:root {
            --primary: #6366f1; 
            --bg-color: #f8fafc; 
            --grid-color: #cbd5e1;
            --node-bg: #ffffff; 
            --text-color: #0f172a; 
            --danger: #f43f5e;
            --success: #10b981; 
            --warning: #f59e0b;
            --glass-shell: rgba(244, 247, 251, 0.55);
            --glass-shell-strong: rgba(255, 255, 255, 0.68);
            --glass-stroke: rgba(255, 255, 255, 0.58);
            --glass-shadow: rgba(15, 23, 42, 0.16);
            --glass-button: rgba(255, 255, 255, 0.34);
            --glass-button-hover: rgba(255, 255, 255, 0.5);
            --glass-button-active: rgba(255, 255, 255, 0.7);
            --liquid-bar-base: rgba(255, 255, 255, 0.14);
            --liquid-bar-edge: rgba(255, 255, 255, 0.5);
            --liquid-bar-shadow: rgba(15, 23, 42, 0.12);
        }

        body, html {
            margin: 0; padding: 0; width: 100%; height: 100%;
            font-family: system-ui, -apple-system, sans-serif;
            overflow: hidden; background-color: var(--bg-color);
        }

        body.canvas-interacting,
        body.canvas-interacting * {
            user-select: none !important;
            -webkit-user-select: none !important;
        }

        #app { display: flex; flex-direction: column; height: 100%; width: 100%; position: relative; }

        #bg-grid {
            position: absolute; top: 0; left: 0; width: 500vw; height: 500vh;
            background-image: radial-gradient(circle, var(--grid-color) 1.5px, transparent 1.5px);
            background-size: 24px 24px; pointer-events: none; transform-origin: 0 0; z-index: 0;
        }

        /* Toolbar */
        #toolbarStack {
            position: absolute; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom));
            transform: translateX(-50%);
            display: flex; flex-direction: column; align-items: center; gap: 12px;
            width: min(1480px, calc(100vw - 24px));
            z-index: 100; pointer-events: none;
        }
        #toolbarStack > * { pointer-events: auto; }
        .floating-bar {
            position: relative;
            display: flex; flex-wrap: wrap; align-items: center; gap: 5px;
            padding: 6px; box-sizing: border-box;
            border-radius: 28px;
            background:
                radial-gradient(circle at 16% 18%, rgba(255, 255, 255, 0.45), transparent 18%),
                radial-gradient(circle at 82% 22%, rgba(255, 255, 255, 0.25), transparent 19%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.48)),
                rgba(248, 250, 252, 0.65);
            -webkit-backdrop-filter: blur(28px) saturate(190%);
            backdrop-filter: blur(28px) saturate(190%);
            border: 1px solid rgba(255, 255, 255, 0.85);
            box-shadow:
                0 12px 32px -4px rgba(15, 23, 42, 0.10),
                0 4px 12px -2px rgba(15, 23, 42, 0.05),
                0 0 0 1px rgba(203, 213, 225, 0.45),
                inset 0 1px 0 rgba(255, 255, 255, 0.95);
            isolation: isolate;
            overflow: hidden;
        }
        .floating-bar::before,
        .floating-bar::after {
            content: "";
            position: absolute;
            pointer-events: none;
            inset: 0;
            border-radius: inherit;
        }
        .floating-bar::before {
            inset: -36% -10%;
            background:
                radial-gradient(circle at 18% 34%, rgba(255, 255, 255, 0.6), transparent 18%),
                radial-gradient(circle at 42% 18%, rgba(255, 255, 255, 0.20), transparent 20%),
                radial-gradient(circle at 74% 30%, rgba(255, 255, 255, 0.20), transparent 22%),
                radial-gradient(circle at 84% 74%, rgba(191, 219, 254, 0.16), transparent 24%);
            opacity: 0.85;
            filter: blur(16px);
            mix-blend-mode: screen;
            animation: toolbarLiquidDrift 16s ease-in-out infinite alternate;
            z-index: -2;
        }
        .floating-bar::after {
            inset: 1px;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.26), rgba(255, 255, 255, 0.04) 42%, rgba(255, 255, 255, 0.08)),
                radial-gradient(140% 90% at 18% 0%, rgba(255, 255, 255, 0.38), transparent 34%),
                radial-gradient(90% 120% at 86% 100%, rgba(191, 219, 254, 0.12), transparent 36%);
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
            z-index: -1;
        }
        #toolbar {
            width: auto;
            max-width: none;
            flex-wrap: nowrap;
            justify-content: center;
            gap: 5px;
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            align-self: center;
        }
        #toolbar::-webkit-scrollbar { display: none; }
        #toolbar > .toolbar-section {
            flex: 0 0 auto;
            width: auto;
            max-width: none;
        }
        #toolbar > .toolbar-section.toolbar-section-wide {
            flex: 0 0 auto;
        }
        #toolbar > .toolbar-section.toolbar-section-save {
            margin-left: 0;
        }
        #toolbar .save-menu-btn {
            width: auto;
        }
        #toolbarStack.delete-drop-ready #toolbar {
            border-color: rgba(251, 113, 133, 0.6);
            box-shadow:
                0 12px 32px rgba(15, 23, 42, 0.10),
                0 0 0 1px rgba(251, 113, 133, 0.35),
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
        }
        #toolbarStack.delete-drop-hover #toolbar {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 228, 230, 0.4)),
                rgba(255, 228, 230, 0.5);
            border-color: rgba(251, 113, 133, 0.8);
            box-shadow:
                0 16px 36px rgba(244, 63, 94, 0.16),
                0 0 0 3px rgba(251, 113, 133, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
        }
        #toolbarStack.delete-drop-hover #toolbar > .toolbar-section {
            background: rgba(255, 228, 230, 0.4);
            border-color: rgba(251, 113, 133, 0.3);
        }
        #connectionTools,
        #colorTools,
        #formatTools,
        #tableTools {
            display: none;
            width: auto; max-width: 100%;
            justify-content: center;
            align-self: center;
            padding: 6px 10px;
        }
        #connectionTools.visible,
        #colorTools.visible,
        #formatTools.visible,
        #tableTools.visible { display: flex; }
        .toolbar-section {
            display: flex; align-items: center; gap: 4px;
            padding: 3px;
            border-radius: 22px;
            background: rgba(255, 255, 255, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.65);
            box-shadow:
                0 1px 2px rgba(15, 23, 42, 0.04),
                0 0 0 1px rgba(203, 213, 225, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
            flex: 0 1 auto;
            max-width: 100%;
        }
        .toolbar-section-compact {
            padding: 2px 4px;
            background: transparent;
            border-color: transparent;
            box-shadow: none;
        }
        .toolbar-section-wide {
            flex: 1 1 320px;
            justify-content: center;
        }
        .toolbar-section-input {
            gap: 10px;
        }
        .toolbar-section-save {
            margin-left: auto;
            flex-shrink: 0;
        }
        .divider {
            width: 1px; align-self: stretch; min-height: 34px;
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(148, 163, 184, 0.32), rgba(255, 255, 255, 0.02));
            flex: 0 0 auto;
            opacity: 0.72;
        }
        .tool-group {
            display: flex; flex-wrap: wrap; gap: 4px; align-items: center; justify-content: center;
            max-width: 100%;
        }
        .rich-format-btn {
            min-width: 48px;
            padding-inline: 12px;
            font-size: 11px;
            letter-spacing: 0.03em;
        }
        .table-tool-btn {
            min-width: 58px;
            padding-inline: 12px;
            font-size: 11px;
            letter-spacing: 0.03em;
        }
        .table-tool-btn.active {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.04)),
                linear-gradient(135deg, rgba(14, 165, 233, 0.82), rgba(37, 99, 235, 0.64));
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.34);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.3),
                0 10px 24px rgba(37, 99, 235, 0.18);
        }
        .connection-type-group {
            gap: 6px;
        }

@keyframes toolbarLiquidDrift {
            0% {
                transform: translate3d(-2%, -2%, 0) scale(0.98);
            }
            50% {
                transform: translate3d(2%, 3%, 0) scale(1.03);
            }
            100% {
                transform: translate3d(-1%, 4%, 0) scale(1);
            }
        }

@media (prefers-reduced-motion: reduce) {
            .floating-bar::before {
                animation: none;
            }
        }

        body.canvas-interacting .floating-bar::before {
            animation: none;
        }
        
        button {
            padding: 10px 16px;
            border: 1px solid rgba(255, 255, 255, 0.55);
            border-radius: 999px;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0.12)),
                rgba(255, 255, 255, 0.18);
            color: #243244; font-weight: 650; font-size: 14px; cursor: pointer; 
            transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
            white-space: nowrap; touch-action: manipulation;
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.75),
                0 2px 6px rgba(15, 23, 42, 0.05);
            position: relative;
            overflow: hidden;
            flex: 0 0 auto;
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            backdrop-filter: blur(18px) saturate(180%);
        }
        button::before {
            content: "";
            position: absolute;
            inset: 1px;
            border-radius: inherit;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0)),
                radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.22), transparent 30%);
            opacity: 0.88;
            pointer-events: none;
        }
        button:hover:not(.save-menu-btn):not(.layout-btn):not(.icon-btn):not(.mini-btn):not(.modal-btn):not(.toast-close):not(.doc-menu-btn):not(.toast-action):not(.swatch) {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.18)),
                rgba(255, 255, 255, 0.24);
            border-color: rgba(255, 255, 255, 0.85);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.9),
                0 4px 12px rgba(15, 23, 42, 0.08);
        }
        button:active:not(.save-menu-btn):not(.layout-btn):not(.icon-btn):not(.mini-btn):not(.modal-btn):not(.toast-close):not(.doc-menu-btn):not(.toast-action):not(.swatch) {
            transform: scale(0.97);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(255, 255, 255, 0.16)),
                rgba(255, 255, 255, 0.2);
        }
        /* Solid-surface buttons must not inherit the glass gloss overlay. */
        .modal-btn::before,
        .toast-close::before,
        .toast-action::before,
        .swatch::before {
            content: none;
        }
        .icon-btn {
            padding: 10px; border-radius: 50%; width: 40px; height: 40px;
            display: flex; align-items: center; justify-content: center;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0.1)),
                rgba(255, 255, 255, 0.16);
            border: 1px solid rgba(255, 255, 255, 0.55);
        }
        .icon-btn,
        .mini-btn {
            background-size: 100% 100%, 180% 180%;
            background-position: 0 0, 0% 50%;
            isolation: isolate;
            transition:
                transform 0.2s ease,
                box-shadow 0.24s ease,
                border-color 0.24s ease,
                color 0.24s ease,
                filter 0.24s ease,
                background-position 0.32s ease;
        }
        .icon-btn::before,
        .mini-btn::before {
            opacity: 0.8;
            transform: translate3d(-10%, 0, 0);
            transition: opacity 0.24s ease, transform 0.32s ease;
        }
        .icon-btn:hover,
        .mini-btn:hover {
            background-position: 0 0, 100% 50%;
            border-color: rgba(255, 255, 255, 0.85);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.9),
                0 4px 12px rgba(15, 23, 42, 0.08);
            transform: translateY(-1px);
            filter: saturate(1.04);
        }
        .icon-btn:hover::before,
        .mini-btn:hover::before {
            opacity: 1;
            transform: translate3d(0, 0, 0);
        }
        .icon-btn:active,
        .mini-btn:active {
            transform: scale(0.97);
            filter: saturate(1);
        }
        button:disabled {
            opacity: 0.45;
            cursor: not-allowed;
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.3),
                0 1px 3px rgba(15, 23, 42, 0.03);
            transform: none !important;
            filter: none !important;
        }
        .icon-btn svg { width: 18px; height: 18px; display: block; flex-shrink: 0; }
        .icon-btn svg line,
        .icon-btn svg circle,
        .icon-btn svg rect,
        .icon-btn svg ellipse,
        .icon-btn svg polygon,
        .icon-btn svg polyline,
        .icon-btn svg path {
            stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; fill: none;
        }
        .toolbar-create-btn {
            cursor: grab;
        }
        .toolbar-create-btn:active {
            cursor: grabbing;
        }
        .toolbar-drag-preview {
            position: fixed;
            left: 0;
            top: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            pointer-events: none;
            z-index: 160;
            transform: translate(-50%, -50%) rotate(-6deg);
            color: #243244;
            border: 1px solid rgba(255, 255, 255, 0.4);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.14)),
                rgba(255, 255, 255, 0.2);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.66),
                0 18px 36px rgba(15, 23, 42, 0.18);
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            backdrop-filter: blur(18px) saturate(180%);
        }
        .toolbar-drag-preview svg {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }
        .toolbar-drag-preview svg line,
        .toolbar-drag-preview svg circle,
        .toolbar-drag-preview svg rect,
        .toolbar-drag-preview svg ellipse,
        .toolbar-drag-preview svg polygon,
        .toolbar-drag-preview svg polyline,
        .toolbar-drag-preview svg path {
            stroke: currentColor;
            stroke-width: 1.8;
            stroke-linecap: round;
            stroke-linejoin: round;
            fill: none;
        }
        
        #connectBtn.active {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.08)),
                rgba(16, 185, 129, 0.68);
            color: white;
            border-color: rgba(255, 255, 255, 0.5);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.44),
                0 0 0 4px rgba(16, 185, 129, 0.16),
                0 14px 28px rgba(16, 185, 129, 0.22);
        }
        .save-menu-btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 10px 16px;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.04)),
                linear-gradient(135deg, rgba(99, 102, 241, 0.88), rgba(79, 70, 229, 0.72));
            background-size: 100% 100%, 180% 180%;
            background-position: 0 0, 0% 50%;
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.45);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.45),
                0 2px 8px rgba(99, 102, 241, 0.2);
            isolation: isolate;
            transition:
                transform 0.2s ease,
                box-shadow 0.24s ease,
                border-color 0.24s ease,
                filter 0.24s ease,
                background-position 0.32s ease;
        }
        .save-menu-btn::after {
            content: "";
            position: absolute;
            inset: 1px;
            border-radius: inherit;
            background:
                radial-gradient(circle at 18% 16%, rgba(255, 255, 255, 0.24), transparent 30%),
                linear-gradient(135deg, rgba(129, 140, 248, 0.92), rgba(79, 70, 229, 0.82));
            opacity: 0;
            transform: translate3d(-10%, 0, 0);
            transition: opacity 0.24s ease, transform 0.32s ease;
            pointer-events: none;
            z-index: 0;
        }
        .save-menu-btn:hover {
            background-position: 0 0, 100% 50%;
            border-color: rgba(255, 255, 255, 0.7);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.6),
                0 4px 14px rgba(99, 102, 241, 0.25);
            transform: translateY(-1px);
            filter: saturate(1.08);
        }
        .save-menu-btn:hover::after {
            opacity: 1;
            transform: translate3d(0, 0, 0);
        }
        .save-menu-btn:active {
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.32),
                0 2px 6px rgba(99, 102, 241, 0.2);
            transform: scale(0.97);
            filter: saturate(1);
        }
        .save-menu-btn svg,
        .save-menu-btn span {
            position: relative;
            z-index: 1;
        }
        .save-menu-btn svg { width: 18px; height: 18px; }
        .save-menu-btn svg line,
        .save-menu-btn svg circle,
        .save-menu-btn svg rect,
        .save-menu-btn svg polyline,
        .save-menu-btn svg path {
            stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; fill: none;
        }
        .save-menu-btn span { font-weight: 700; letter-spacing: 0.02em; }
        .save-menu-btn.active,
        .save-menu-btn[aria-expanded="true"] {
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.34),
                0 0 0 3px rgba(99, 102, 241, 0.2),
                0 6px 18px rgba(99, 102, 241, 0.25);
        }
        .save-menu-btn.active::after,
        .save-menu-btn[aria-expanded="true"]::after {
            opacity: 1;
            transform: translate3d(0, 0, 0);
        }
        .mini-btn {
            padding: 8px 10px; min-width: 36px; height: 36px; border-radius: 14px;
            font-size: 12px; font-weight: 700; display: inline-flex; align-items: center; justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.55);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0.1)),
                rgba(255, 255, 255, 0.16);
        }
        .connection-type-btn {
            min-width: 74px;
            padding-inline: 14px;
        }
        .connection-type-btn.active {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.04)),
                linear-gradient(135deg, rgba(59, 130, 246, 0.78), rgba(37, 99, 235, 0.62));
            color: white;
            border-color: rgba(255, 255, 255, 0.5);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.3),
                0 4px 12px rgba(59, 130, 246, 0.18);
        }
        .accent-btn,
        .layout-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.16)),
                linear-gradient(135deg, rgba(191, 219, 254, 0.45), rgba(147, 197, 253, 0.18));
            background-size: 100% 100%, 180% 180%;
            background-position: 0 0, 0% 50%;
            color: #1e40af;
            border: 1px solid rgba(191, 219, 254, 0.6);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.75),
                0 2px 6px rgba(96, 165, 250, 0.1);
            isolation: isolate;
            transition:
                transform 0.2s ease,
                box-shadow 0.24s ease,
                border-color 0.24s ease,
                color 0.24s ease,
                filter 0.24s ease,
                background-position 0.32s ease;
        }
        .layout-btn::after {
            content: "";
            position: absolute;
            inset: 1px;
            border-radius: inherit;
            background:
                radial-gradient(circle at 18% 16%, rgba(255, 255, 255, 0.22), transparent 32%),
                linear-gradient(135deg, rgba(96, 165, 250, 0.24), rgba(59, 130, 246, 0.08));
            opacity: 0;
            transform: translate3d(-10%, 0, 0);
            transition: opacity 0.24s ease, transform 0.32s ease;
            pointer-events: none;
            z-index: 0;
        }
        .layout-btn:hover {
            background-position: 0 0, 100% 50%;
            color: #1d4ed8;
            border-color: rgba(191, 219, 254, 0.9);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.85),
                0 4px 12px rgba(59, 130, 246, 0.15);
            transform: translateY(-1px);
            filter: saturate(1.06);
        }
        .layout-btn:hover::after {
            opacity: 1;
            transform: translate3d(0, 0, 0);
        }
        .layout-btn:active {
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.52),
                0 2px 6px rgba(59, 130, 246, 0.1);
            transform: scale(0.97);
            filter: saturate(1);
        }
        .layout-btn svg,
        .layout-btn span {
            position: relative;
            z-index: 1;
        }
        .layout-btn span {
            font-weight: 700;
            letter-spacing: 0.01em;
        }
        .layout-btn .toolbar-caret {
            font-size: 12px;
            font-weight: 800;
            letter-spacing: 0;
            line-height: 1;
            opacity: 0.75;
        }
        .layout-btn svg {
            width: 18px;
            height: 18px;
        }
        .layout-btn svg line,
        .layout-btn svg circle,
        .layout-btn svg rect,
        .layout-btn svg polyline,
        .layout-btn svg path {
            stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; fill: none;
        }
        .layout-btn.active,
        .layout-btn[aria-expanded="true"] {
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.56),
                0 0 0 4px rgba(59, 130, 246, 0.14),
                0 16px 30px rgba(59, 130, 246, 0.18);
        }
        .layout-btn.active::after,
        .layout-btn[aria-expanded="true"]::after {
            opacity: 1;
            transform: translate3d(0, 0, 0);
        }
        .layout-btn-icon {
            width: 40px;
            padding-inline: 10px;
            gap: 0;
            flex-shrink: 0;
        }
        .mini-btn svg { width: 18px; height: 18px; display: block; flex-shrink: 0; }
        .mini-btn svg line,
        .mini-btn svg rect {
            stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; fill: none;
        }

        /* Professional Color Palette */
        .tool-label {
            font-size: 11px; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase;
            color: rgba(71, 85, 105, 0.88); margin-right: 4px; flex-shrink: 0;
        }
        .tool-input {
            min-width: 170px;
            height: 38px;
            padding: 0 14px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.08)),
                rgba(255, 255, 255, 0.12);
            color: var(--text-color);
            font: inherit;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.44);
            outline: none;
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            backdrop-filter: blur(18px) saturate(180%);
        }
        .tool-input::placeholder {
            color: #94a3b8;
        }
        .tool-input:focus {
            border-color: rgba(99, 102, 241, 0.45);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.5),
                0 0 0 4px rgba(99, 102, 241, 0.12);
        }
        
        .palette-container { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; justify-content: center; }
        .swatch {
            width: 22px; height: 22px; border-radius: 50%; cursor: pointer;
            border: 2px solid rgba(255, 255, 255, 0.44); transition: transform 0.1s, border-color 0.1s, box-shadow 0.1s;
            box-shadow: 0 6px 14px rgba(148, 163, 184, 0.16);
            flex-shrink: 0;
            padding: 0;
            appearance: none;
            -webkit-appearance: none;
            background-clip: padding-box;
        }
        .swatch:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
        .swatch:hover { transform: scale(1.15); }
        .swatch.active { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.16), 0 8px 18px rgba(99, 102, 241, 0.16); }

        /* Canvas */
        #canvas-viewport { flex-grow: 1; position: absolute; width: 100%; height: 100%; overflow: hidden; touch-action: none; z-index: 1; }
        #canvas-content { position: absolute; top: 0; left: 0; width: 100%; height: 100%; transform-origin: 0 0; z-index: 2;}
        #svg-layer { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible;}
        #selection-box { position: absolute; border: 1px solid var(--primary); background: rgba(99, 102, 241, 0.15); display: none; pointer-events: none; z-index: 50; }
        .connection-label-editor {
            position: absolute;
            display: none;
            left: 0;
            top: 0;
            transform: translate(-50%, -50%);
            min-width: 88px;
            max-width: 320px;
            height: 34px;
            padding: 0 12px;
            border-radius: 999px;
            border: 1px solid rgba(244, 63, 94, 0.34);
            background: rgba(255, 255, 255, 0.96);
            color: #334155;
            font: 700 12px/1.2 system-ui, -apple-system, sans-serif;
            text-align: center;
            outline: none;
            box-shadow:
                0 14px 30px rgba(15, 23, 42, 0.18),
                0 0 0 4px rgba(244, 63, 94, 0.12);
            z-index: 6;
        }
        .connection-label-editor.visible {
            display: block;
        }
        .connection-label-editor::placeholder {
            color: #94a3b8;
            font-weight: 600;
        }

        /* Nodes */
        .node {
            position: absolute; display: flex; flex-direction: column; align-items: center; justify-content: center;
            border: 2px solid #94a3b8; 
            font-size: 14px; font-weight: 600; min-width: 70px; min-height: 36px; padding: 10px 20px;
            cursor: grab; z-index: 2; box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            touch-action: none; user-select: none; transition: box-shadow 0.2s, border-color 0.2s, background-color 0.2s; 
            text-align: center; box-sizing: border-box; outline: none; gap: 8px;
            /* Avoid abs-pos shrink-to-fit width changes as nodes move right. */
            width: max-content;
        }
        
        .node .label {
            outline: none; min-width: 20px; max-width: 100%; word-break: break-word; pointer-events: auto; display: block;
            white-space: normal;
            line-height: 1.35;
            padding: 6px 8px;
            margin: -6px -8px;
            border-radius: 10px;
            user-select: none; -webkit-user-select: none;
        }
        .node .label > :first-child { margin-top: 0; }
        .node .label > :last-child { margin-bottom: 0; }
        .node .label p,
        .node .label div,
        .node .label ul,
        .node .label ol,
        .node.table .label table {
            margin: 0.4em 0;
        }
        .node .label h1,
        .node .label h2,
        .node .label h3 {
            margin: 0.3em 0;
            line-height: 1.15;
            font-weight: 800;
        }
        .node .label h1 { font-size: 1.45em; }
        .node .label h2 { font-size: 1.25em; }
        .node .label h3 { font-size: 1.1em; }
        .node .label a {
            color: var(--primary);
            text-decoration: underline;
            text-decoration-thickness: 1.5px;
        }
        .node .label label {
            display: inline-flex;
            align-items: flex-start;
            gap: 8px;
        }
        .node .label input[type="checkbox"] {
            margin: 0.22em 0 0;
            accent-color: var(--primary);
            flex-shrink: 0;
        }
        .node .label img {
            max-width: min(260px, 100%);
            height: auto;
            display: block;
            margin: 8px auto;
            border-radius: 12px;
            box-shadow: 0 10px 24px rgba(15, 23, 42, 0.14);
        }
        .node-metadata {
            display: grid;
            gap: 6px;
            width: 100%;
            max-width: 220px;
            pointer-events: none;
        }
        .node-metadata[hidden] {
            display: none;
        }
        .node-metadata-item {
            display: grid;
            gap: 3px;
            padding: 8px 10px;
            border-radius: 14px;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0.18)),
                rgba(255, 255, 255, 0.24);
            border: 1px solid rgba(148, 163, 184, 0.28);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.44);
        }
        .node-metadata-key {
            display: block;
            font-size: 10px;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: #64748b;
        }
        .node-metadata-value {
            display: block;
            font-size: 12px;
            font-weight: 800;
            line-height: 1.2;
            color: inherit;
        }
        .node.table .label table {
            width: 100%;
            border-collapse: collapse;
            border-spacing: 0;
            overflow: hidden;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.58);
        }
        .node.table .label th,
        .node.table .label td {
            border: 1px solid rgba(148, 163, 184, 0.32);
            padding: 6px 8px;
            text-align: left;
            vertical-align: top;
        }
        .node.table .label th {
            background: rgba(226, 232, 240, 0.64);
            font-weight: 700;
        }
        .node.editing {
            cursor: text; border-color: var(--primary); box-shadow: inset 0 0 0 2px rgba(99,102,241,0.2);
            user-select: text; -webkit-user-select: text; touch-action: auto;
        }
        .node.editing .label {
            pointer-events: auto; user-select: text; -webkit-user-select: text; cursor: text;
        }
        .node:active:not(.editing) { cursor: grabbing; box-shadow: 0 8px 25px rgba(0,0,0,0.1); }
        .node.selected { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.3); z-index: 3; }

        .node.start { border-radius: 50px; }
        .node.process { border-radius: 8px; }
        .node.group {
            --group-border-color: #94a3b8;
            --group-overlay-top: rgba(239, 246, 255, 0.42);
            --group-overlay-mid: rgba(219, 234, 254, 0.12);
            --group-overlay-bottom: rgba(219, 234, 254, 0.04);
            min-width: 220px;
            min-height: 140px;
            padding: 16px 18px 28px;
            align-items: stretch;
            justify-content: flex-start;
            text-align: left;
            border-style: dashed;
            border-color: var(--group-border-color);
            border-radius: 18px;
            background: transparent;
            background-color: transparent !important;
            box-shadow:
                inset 0 0 0 1px rgba(255, 255, 255, 0.58),
                0 4px 15px rgba(0,0,0,0.05);
            z-index: 1;
            overflow: visible;
        }
        .node.group::before {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: 16px;
            background:
                linear-gradient(180deg, var(--group-overlay-top), var(--group-overlay-mid) 34%, var(--group-overlay-bottom) 100%),
                linear-gradient(90deg, rgba(255, 255, 255, 0.38), rgba(255, 255, 255, 0.06));
            pointer-events: none;
            z-index: 0;
        }
        .node.group > :not(.node-resize-handle):not(.collapse-btn) {
            position: relative;
            z-index: 1;
        }
        .node.group.selected {
            border-color: var(--primary);
            z-index: 1;
        }
        .node.group .label {
            width: 100%;
            min-width: 0;
            margin: 0;
            padding: 0;
            border-radius: 0;
            text-align: left;
        }
        .node.group .node-metadata {
            width: 100%;
            max-width: none;
            margin-top: auto;
        }
        .node.group .node-metadata-item {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.14)),
                rgba(255, 255, 255, 0.12);
        }
        .node.group .collapse-btn {
            z-index: 11;
        }
        .node.group .node-resize-handle {
            position: absolute;
            z-index: 12;
            pointer-events: auto;
            touch-action: none;
        }
        .node.decision {
            clip-path: none;
            border: none;
            background: transparent !important;
            background-color: transparent !important;
            min-width: 70px;
            min-height: 70px;
            padding: 18px;
            isolation: isolate;
            overflow: visible;
            box-shadow: none !important;
            filter: drop-shadow(0 4px 15px rgba(0,0,0,0.05));
        }
        .node.decision::before,
        .node.decision::after {
            content: "";
            position: absolute;
            inset: 0;
            clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
            pointer-events: none;
            transition: background 0.2s;
        }
        .node.decision::before {
            background: #94a3b8;
            z-index: 0;
        }
        .node.decision::after {
            inset: 2.82px;
            background: var(--decision-bg, #ffffff);
            z-index: 0;
        }
        .node.decision .label,
        .node.decision .node-metadata {
            position: relative;
            z-index: 1;
        }
        .node.decision .collapse-btn {
            bottom: -12px;
            z-index: 2;
        }
        .node.decision .node-resize-handle {
            z-index: 2;
        }
        .node.decision.selected::before,
        .node.decision.editing::before {
            background: var(--primary);
        }
        .node.decision.selected {
            filter: drop-shadow(0 4px 15px rgba(0,0,0,0.05)) drop-shadow(0 0 6px rgba(99, 102, 241, 0.24));
            border-color: transparent !important;
            box-shadow: none !important;
        }
        .node.decision.editing {
            border-color: transparent !important;
        }
        .node.floatingText {
            min-width: 160px;
            min-height: 34px;
            padding: 4px 6px;
            justify-content: flex-start;
            align-items: flex-start;
            text-align: left;
            border-color: transparent;
            background: transparent;
            box-shadow: none;
            gap: 6px;
        }
        .node.floatingText .label {
            min-width: 96px;
            max-width: 360px;
            padding: 4px 6px;
            margin: -4px -6px;
            text-align: left;
        }
        .node.floatingText .node-metadata {
            max-width: 240px;
        }
        .node.floatingText .node-metadata-item {
            background: rgba(255, 255, 255, 0.86);
        }
        .node.floatingText.selected,
        .node.floatingText.editing {
            border-color: rgba(99, 102, 241, 0.24);
            background: rgba(255, 255, 255, 0.72);
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.16);
        }
        .node.floatingText .collapse-btn { display: none !important; }

        .canvas-table {
            position: absolute;
            min-width: 260px;
            min-height: 0;
            padding: 0;
            border: 1px solid rgba(148, 163, 184, 0.72);
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.96);
            color: #0f172a;
            box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
            cursor: grab;
            z-index: 2;
            box-sizing: border-box;
            /* Avoid abs-pos shrink-to-fit width changes as tables move right. */
            width: max-content;
            user-select: none;
            touch-action: none;
        }
        .canvas-table .table-hover-actions {
            position: absolute;
            top: calc(100% + 10px);
            right: 0;
            display: flex;
            gap: 6px;
            opacity: 0;
            transform: translateY(-4px) scale(0.98);
            pointer-events: none;
            transition: opacity 0.18s ease, transform 0.18s ease;
            z-index: 7;
        }
        .canvas-table:hover .table-hover-actions,
        .canvas-table.selected .table-hover-actions,
        .canvas-table.editing .table-hover-actions {
            opacity: 1;
            transform: translateY(0) scale(1);
            pointer-events: auto;
        }
        .table-add-btn {
            min-width: 0;
            height: 28px;
            padding: 0 10px;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.04em;
            border-radius: 999px;
            color: #475569;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.94)),
                rgba(255, 255, 255, 0.96);
            border: 1px solid rgba(148, 163, 184, 0.34);
            box-shadow: 0 3px 8px rgba(15, 23, 42, 0.1);
        }
        .table-add-btn::before {
            inset: 0;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0));
            opacity: 0.72;
        }
        .table-add-btn:hover {
            color: #334155;
            border-color: rgba(99, 102, 241, 0.42);
            box-shadow:
                0 6px 12px rgba(99, 102, 241, 0.12),
                0 0 0 2px rgba(99, 102, 241, 0.1);
        }
        .table-add-btn.summary-active {
            color: #0f172a;
            border-color: rgba(14, 165, 233, 0.32);
            background:
                linear-gradient(180deg, rgba(240, 249, 255, 0.98), rgba(224, 242, 254, 0.92)),
                rgba(240, 249, 255, 0.95);
            box-shadow:
                0 6px 16px rgba(14, 165, 233, 0.12),
                inset 0 1px 0 rgba(255, 255, 255, 0.4);
        }
        .table-add-btn.summary-active:hover,
        .table-add-btn.menu-open {
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.22);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04)),
                linear-gradient(135deg, rgba(14, 165, 233, 0.88), rgba(37, 99, 235, 0.74));
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.24),
                0 12px 22px rgba(37, 99, 235, 0.2);
        }
        .table-add-btn:active {
            transform: scale(0.97);
        }
        .canvas-table .table-content {
            position: relative;
            z-index: 1;
            overflow: hidden;
            border-radius: inherit;
        }
        .canvas-table .table-summary-row > td,
        .canvas-table .table-summary-row > th {
            background:
                linear-gradient(180deg, rgba(248, 250, 252, 0.98), rgba(241, 245, 249, 0.96)),
                rgba(241, 245, 249, 0.94);
            border-top: 2px solid rgba(14, 165, 233, 0.22);
            font-weight: 700;
            color: #0f172a;
            vertical-align: middle;
        }
        .canvas-table .table-summary-row > td:first-child,
        .canvas-table .table-summary-row > th:first-child {
            min-width: 118px;
            background:
                linear-gradient(135deg, rgba(224, 242, 254, 0.98), rgba(239, 246, 255, 0.96)),
                rgba(224, 242, 254, 0.94);
        }
        .canvas-table .table-summary-row > td:first-child > div:first-child,
        .canvas-table .table-summary-row > th:first-child > div:first-child {
            margin-bottom: 4px;
        }
        .canvas-table .table-summary-row > td:first-child strong,
        .canvas-table .table-summary-row > th:first-child strong {
            display: inline-block;
            padding: 2px 7px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.78);
            color: #0369a1;
            font-size: 10px;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }
        .canvas-table .table-summary-row > td:first-child > div:last-child,
        .canvas-table .table-summary-row > th:first-child > div:last-child {
            font-size: 12px;
            font-weight: 700;
            color: #1e293b;
        }
        .canvas-table.editing .table-summary-row > td,
        .canvas-table.editing .table-summary-row > th {
            cursor: default;
        }
        .canvas-table .table-filter-menu {
            position: absolute;
            min-width: 244px;
            max-width: min(286px, calc(100vw - 40px));
            padding: 12px;
            border-radius: 16px;
            background:
                radial-gradient(circle at 18% 18%, rgba(255, 255, 255, 0.84), transparent 28%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(244, 248, 252, 0.97)),
                rgba(255, 255, 255, 0.96);
            border: 1px solid rgba(148, 163, 184, 0.2);
            box-shadow:
                0 22px 44px rgba(15, 23, 42, 0.16),
                0 10px 22px rgba(59, 130, 246, 0.08);
            z-index: 16;
            box-sizing: border-box;
        }
        .canvas-table .table-filter-menu[hidden] {
            display: none;
        }
        .canvas-table .table-summary-menu {
            position: absolute;
            min-width: 296px;
            max-width: min(360px, calc(100vw - 40px));
            padding: 14px;
            border-radius: 18px;
            background:
                radial-gradient(circle at 18% 18%, rgba(255, 255, 255, 0.84), transparent 28%),
                linear-gradient(180deg, rgba(255, 255, 255, 0.99), rgba(239, 246, 255, 0.97)),
                rgba(255, 255, 255, 0.98);
            border: 1px solid rgba(125, 211, 252, 0.28);
            box-shadow:
                0 26px 48px rgba(15, 23, 42, 0.16),
                0 12px 24px rgba(14, 165, 233, 0.1);
            z-index: 16;
            box-sizing: border-box;
        }
        .canvas-table .table-summary-menu[hidden] {
            display: none;
        }
        .canvas-table .table-summary-menu-eyebrow {
            margin-bottom: 4px;
            font-size: 10px;
            font-weight: 800;
            color: #0284c7;
            letter-spacing: 0.12em;
            text-transform: uppercase;
        }
        .canvas-table .table-filter-menu-heading {
            margin-bottom: 12px;
            font-size: 13px;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: 0.015em;
        }
        .canvas-table .table-summary-menu-heading {
            margin-bottom: 6px;
            font-size: 15px;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: 0.015em;
        }
        .canvas-table .table-summary-menu-description {
            margin-bottom: 10px;
            font-size: 12px;
            line-height: 1.45;
            color: #475569;
        }
        .canvas-table .table-summary-menu-current {
            margin-bottom: 12px;
            padding: 8px 10px;
            border-radius: 12px;
            background: rgba(248, 250, 252, 0.82);
            border: 1px solid rgba(148, 163, 184, 0.16);
            font-size: 11px;
            color: #475569;
        }
        .canvas-table .table-summary-menu-current strong {
            color: #0f172a;
        }
        .canvas-table .table-filter-menu-section {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }
        .canvas-table .table-filter-menu-field {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .canvas-table .table-filter-menu-label {
            font-size: 11px;
            font-weight: 700;
            color: #64748b;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        .canvas-table .table-filter-sort-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 6px;
        }
        .canvas-table .table-filter-sort-btn {
            min-width: 0;
            height: 34px;
            padding-inline: 10px;
            font-size: 11px;
            justify-content: center;
        }
        .canvas-table .table-filter-sort-btn.active {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04)),
                linear-gradient(135deg, rgba(14, 165, 233, 0.84), rgba(37, 99, 235, 0.68));
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.3);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.26),
                0 10px 22px rgba(37, 99, 235, 0.18);
        }
        .canvas-table .table-filter-menu-divider {
            height: 1px;
            margin: 12px 0;
            background: linear-gradient(90deg, rgba(148, 163, 184, 0.04), rgba(148, 163, 184, 0.34), rgba(148, 163, 184, 0.04));
        }
        .canvas-table .table-filter-menu-input {
            width: 100%;
            min-width: 0;
            height: 34px;
            padding: 0 10px;
            border-radius: 10px;
            border: 1px solid rgba(148, 163, 184, 0.28);
            background: rgba(248, 250, 252, 0.9);
            color: #0f172a;
            font: inherit;
            font-size: 12px;
            box-sizing: border-box;
            outline: none;
            transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
        }
        .canvas-table .table-filter-menu-input::placeholder {
            color: #94a3b8;
        }
        .canvas-table .table-filter-menu-input:focus {
            border-color: rgba(59, 130, 246, 0.48);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.14);
            background: #ffffff;
        }
        .canvas-table .table-filter-menu-actions {
            display: flex;
            justify-content: flex-end;
            gap: 6px;
            margin-top: 12px;
        }
        .canvas-table .table-filter-menu-btn {
            min-width: 68px;
            height: 32px;
            font-size: 11px;
        }
        .canvas-table .table-summary-menu-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 8px;
        }
        .canvas-table .table-summary-menu-option {
            min-width: 0;
            min-height: 84px;
            padding: 10px 12px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: space-between;
            gap: 8px;
            text-align: left;
            border-radius: 14px;
            font-size: 11px;
            line-height: 1.35;
            white-space: normal;
        }
        .canvas-table .table-summary-menu-option-label {
            font-size: 13px;
            font-weight: 800;
            color: #0f172a;
        }
        .canvas-table .table-summary-menu-option-description {
            color: #475569;
        }
        .canvas-table .table-summary-menu-option-state {
            font-size: 10px;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: #0284c7;
        }
        .canvas-table .table-summary-menu-option.active {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04)),
                linear-gradient(135deg, rgba(14, 165, 233, 0.84), rgba(37, 99, 235, 0.68));
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.3);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.26),
                0 10px 22px rgba(37, 99, 235, 0.18);
        }
        .canvas-table .table-summary-menu-option.active .table-summary-menu-option-label,
        .canvas-table .table-summary-menu-option.active .table-summary-menu-option-description,
        .canvas-table .table-summary-menu-option.active .table-summary-menu-option-state {
            color: #ffffff;
        }
        .canvas-table .table-summary-menu-actions {
            display: flex;
            justify-content: flex-end;
            gap: 6px;
            margin-top: 12px;
        }
        .canvas-table .table-summary-menu-btn {
            min-width: 68px;
            height: 32px;
            font-size: 11px;
        }
        .canvas-table.filters-active .table-row-drag-handle {
            opacity: 0;
            pointer-events: none;
        }
        .canvas-table .table-column-handle-layer {
            position: absolute;
            overflow: visible;
            pointer-events: none;
            z-index: 6;
        }
        .canvas-table .table-row-handle-layer {
            position: absolute;
            overflow: visible;
            pointer-events: none;
            z-index: 6;
        }
        .canvas-table:active:not(.editing) {
            cursor: grabbing;
        }
        .canvas-table.selected {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.22);
            z-index: 3;
        }
        .canvas-table.editing {
            cursor: text;
            border-color: var(--primary);
            box-shadow:
                0 0 0 4px rgba(99, 102, 241, 0.18),
                0 10px 26px rgba(15, 23, 42, 0.1);
        }
        .canvas-table table {
            width: 100%;
            border-collapse: collapse;
            border-spacing: 0;
            background: transparent;
            border-radius: inherit;
            overflow: hidden;
        }
        .canvas-table th,
        .canvas-table td {
            border: 1px solid rgba(148, 163, 184, 0.34);
            padding: 6px 8px;
            min-width: 72px;
            text-align: left;
            vertical-align: top;
            user-select: text;
            -webkit-user-select: text;
            outline: none;
            position: relative;
        }
        .canvas-table th:empty::before,
        .canvas-table td:empty::before {
            content: attr(data-placeholder);
            color: #cbd5e1;
            font-style: italic;
            pointer-events: none;
        }
        .canvas-table th:empty::before {
            color: #94a3b8;
        }
        .canvas-table th {
            background:
                linear-gradient(180deg, rgba(248, 250, 252, 0.98), rgba(226, 232, 240, 0.86)),
                rgba(226, 232, 240, 0.72);
            font-weight: 800;
            color: #0f172a;
            letter-spacing: 0.01em;
        }
        .canvas-table tbody tr:nth-child(even) > td {
            background: rgba(248, 250, 252, 0.78);
        }
        .canvas-table tbody tr:hover > td {
            background: rgba(239, 246, 255, 0.78);
        }
        .canvas-table.filters-visible th {
            padding-right: 36px;
        }
        .canvas-table th.table-sort-column {
            background:
                linear-gradient(180deg, rgba(239, 246, 255, 0.98), rgba(219, 234, 254, 0.88)),
                rgba(226, 232, 240, 0.72);
        }
        .canvas-table .table-filter-btn {
            position: absolute;
            top: 50%;
            right: 6px;
            width: 22px;
            height: 22px;
            min-width: 0;
            padding: 0;
            border-radius: 7px;
            border: 1px solid rgba(148, 163, 184, 0.12);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.26)),
                rgba(255, 255, 255, 0.36);
            color: #64748b;
            transform: translateY(-50%);
            box-shadow: 0 4px 10px rgba(15, 23, 42, 0.06);
            opacity: 0.94;
            z-index: 2;
        }
        .canvas-table .table-filter-btn::before {
            content: attr(data-icon);
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            font-weight: 800;
            line-height: 1;
            opacity: 1;
            transform: none;
            background: transparent;
        }
        .canvas-table .table-filter-btn::after {
            content: "";
            position: absolute;
            right: 2px;
            bottom: 2px;
            width: 5px;
            height: 5px;
            border-radius: 999px;
            background: transparent;
            box-shadow: none;
        }
        .canvas-table .table-filter-btn:hover,
        .canvas-table .table-filter-btn.menu-open {
            border-color: rgba(59, 130, 246, 0.26);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(219, 234, 254, 0.54)),
                rgba(255, 255, 255, 0.86);
            color: #2563eb;
            box-shadow: 0 8px 16px rgba(37, 99, 235, 0.14);
            transform: translateY(-50%);
        }
        .canvas-table .table-filter-btn.active {
            border-color: rgba(59, 130, 246, 0.34);
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(219, 234, 254, 0.7)),
                rgba(219, 234, 254, 0.96);
            color: #1d4ed8;
        }
        .canvas-table .table-filter-btn.active::after {
            background: #2563eb;
            box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.92);
        }
        .canvas-table .table-filter-btn.sorted {
            color: #0f4eb3;
        }
        .canvas-table .table-filter-btn:active {
            transform: translateY(-50%) scale(0.96);
        }
        .canvas-table th.table-scope-selected,
        .canvas-table td.table-scope-selected {
            box-shadow: inset 0 0 0 2px rgba(59, 130, 246, 0.2);
        }
        .canvas-table th.table-scope-anchor,
        .canvas-table td.table-scope-anchor {
            box-shadow: inset 0 0 0 2px rgba(29, 78, 216, 0.4);
        }
        .table-structure-handle {
            position: absolute;
            width: 14px;
            height: 14px;
            min-width: 0;
            padding: 0;
            border-radius: 999px;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.94)),
                rgba(255, 255, 255, 0.96);
            border: 1px solid rgba(148, 163, 184, 0.34);
            box-shadow: 0 3px 8px rgba(15, 23, 42, 0.1);
            opacity: 0;
            pointer-events: auto;
            transition: opacity 0.18s ease, transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
            z-index: 5;
            touch-action: none;
        }
        .table-structure-handle::before {
            content: "";
            position: absolute;
            inset: 3px;
            border-radius: 999px;
            background:
                radial-gradient(circle, rgba(71, 85, 105, 0.78) 0.85px, transparent 1.05px) 0 0 / 4px 4px;
            opacity: 0.8;
        }
        .table-col-drag-handle {
            cursor: grab;
            transform: translateX(-50%);
        }
        .table-row-drag-handle {
            cursor: grab;
            transform: translate(-50%, -50%);
        }
        .canvas-table:hover .table-structure-handle,
        .canvas-table.selected .table-structure-handle,
        .canvas-table.editing .table-structure-handle,
        .canvas-table.reordering .table-structure-handle {
            opacity: 1;
        }
        .canvas-table:hover .table-col-drag-handle,
        .canvas-table.selected .table-col-drag-handle,
        .canvas-table.editing .table-col-drag-handle,
        .canvas-table.reordering .table-col-drag-handle {
            transform: translateX(-50%);
        }
        .canvas-table:hover .table-row-drag-handle,
        .canvas-table.selected .table-row-drag-handle,
        .canvas-table.editing .table-row-drag-handle,
        .canvas-table.reordering .table-row-drag-handle {
            transform: translate(-50%, -50%);
        }
        .table-structure-handle:hover,
        .table-structure-handle.scope-selected,
        .canvas-table.reordering .table-structure-handle {
            border-color: rgba(99, 102, 241, 0.55);
            box-shadow:
                0 6px 12px rgba(99, 102, 241, 0.12),
                0 0 0 2px rgba(99, 102, 241, 0.12);
        }
        .table-structure-handle:active {
            cursor: grabbing;
        }
        .canvas-table td.table-drop-target,
        .canvas-table th.table-drop-target {
            box-shadow: inset 0 0 0 2px rgba(99, 102, 241, 0.28);
            background: rgba(224, 231, 255, 0.7);
        }
        .canvas-table tr.table-drop-row-target > td,
        .canvas-table tr.table-drop-row-target > th {
            background: rgba(224, 231, 255, 0.7);
            box-shadow: inset 0 0 0 2px rgba(99, 102, 241, 0.22);
        }
        .canvas-table a {
            color: var(--primary);
            text-decoration: underline;
            text-decoration-thickness: 1.5px;
        }
        .canvas-table.editing th,
        .canvas-table.editing td {
            background: rgba(255, 255, 255, 0.98);
            cursor: text;
        }
        .canvas-table td:focus,
        .canvas-table th:focus {
            box-shadow: inset 0 0 0 2px rgba(99, 102, 241, 0.28);
        }

        .node-resize-handle {
            position: absolute;
            right: 4px;
            bottom: 4px;
            width: 14px;
            height: 14px;
            display: none;
            border-radius: 4px;
            border: 1px solid rgba(148, 163, 184, 0.6);
            background:
                linear-gradient(135deg, transparent 0 42%, rgba(100, 116, 139, 0.92) 42% 50%, transparent 50% 60%, rgba(100, 116, 139, 0.92) 60% 68%, transparent 68% 100%),
                rgba(255, 255, 255, 0.96);
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.16);
            cursor: nwse-resize;
            z-index: 12;
            touch-action: none;
            pointer-events: auto;
            transition: transform 0.15s ease, border-color 0.15s ease;
        }
        .node-resize-handle:hover {
            transform: scale(1.18);
            border-color: var(--primary);
        }
        .node:hover .node-resize-handle,
        .node.selected .node-resize-handle {
            display: block;
        }
        .node.editing .node-resize-handle {
            display: none;
        }
        .collapse-btn {
            position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%);
            width: 16px; height: 16px; background: white; border: 2px solid #94a3b8;
            border-radius: 50%; font-size: 14px; font-weight: bold; line-height: 1;
            color: #64748b; cursor: pointer; display: none; z-index: 10;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1); user-select: none;
            display: flex; align-items: center; justify-content: center;
        }
        .collapse-btn:hover { border-color: var(--primary); color: var(--primary); }

        .straight-line { stroke: #64748b; stroke-width: 2; transition: stroke 0.15s ease, stroke-width 0.15s ease; }
        .straight-line.dependency-line { stroke-dasharray: 10 7; }
        .straight-line.selected-line { stroke: var(--danger); stroke-width: 4; }
        .connection-group { pointer-events: auto; cursor: pointer; }
        .connection-label-group { cursor: text; }
        .connection-label-text {
            fill: #334155;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.01em;
            paint-order: stroke;
            stroke: rgba(255, 255, 255, 0.96);
            stroke-width: 10;
            stroke-linejoin: round;
            stroke-linecap: round;
        }
        .connection-label-text.selected {
            fill: var(--danger);
            stroke: rgba(255, 241, 242, 0.98);
        }

        .menu-panel {
            position: relative;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.86)),
                rgba(248, 250, 252, 0.9);
            -webkit-backdrop-filter: blur(28px) saturate(190%);
            backdrop-filter: blur(28px) saturate(190%);
            border-radius: 18px; padding: 6px;
            border: 1px solid rgba(255, 255, 255, 0.9);
            box-shadow:
                0 18px 40px -6px rgba(15, 23, 42, 0.14),
                0 6px 16px -2px rgba(15, 23, 42, 0.06),
                0 0 0 1px rgba(203, 213, 225, 0.45),
                inset 0 1px 0 rgba(255, 255, 255, 0.95);
            display: none; flex-direction: column; min-width: 240px; max-width: min(320px, calc(100vw - 24px));
            isolation: isolate;
            overflow: hidden;
        }
        .menu-panel::before,
        .menu-panel::after {
            content: "";
            position: absolute;
            pointer-events: none;
            inset: 0;
            border-radius: inherit;
        }
        .menu-panel::before {
            inset: -36% -10%;
            background:
                radial-gradient(circle at 18% 34%, rgba(255, 255, 255, 0.5), transparent 18%),
                radial-gradient(circle at 42% 18%, rgba(255, 255, 255, 0.16), transparent 20%),
                radial-gradient(circle at 74% 30%, rgba(255, 255, 255, 0.16), transparent 22%),
                radial-gradient(circle at 84% 74%, rgba(191, 219, 254, 0.12), transparent 24%);
            opacity: 0.75;
            filter: blur(14px);
            mix-blend-mode: screen;
            z-index: -2;
        }
        .menu-panel::after {
            inset: 1px;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.20), rgba(255, 255, 255, 0.03) 42%, rgba(255, 255, 255, 0.06)),
                radial-gradient(140% 90% at 18% 0%, rgba(255, 255, 255, 0.30), transparent 34%),
                radial-gradient(90% 120% at 86% 100%, rgba(191, 219, 254, 0.10), transparent 36%);
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
            z-index: -1;
        }
        #context-menu { position: absolute; z-index: 1000; }
        .menu-item {
            padding: 10px 12px; font-size: 14px; font-weight: 500; color: #334155;
            cursor: pointer; border-radius: 12px; display: flex; justify-content: space-between;
            transition: background 0.16s ease, color 0.16s ease;
        }
        .menu-item.hidden,
        .menu-separator.hidden { display: none; }
        .menu-item.disabled {
            opacity: 0.48;
            color: #94a3b8;
            pointer-events: none;
        }
        .menu-item:hover,
        .menu-item:focus-visible {
            background: #dbeafe;
            color: #1d4ed8;
        }
        .menu-item.danger:hover,
        .menu-item.danger:focus-visible {
            background: #ffe4e6;
            color: var(--danger);
        }
        .menu-item:hover .menu-shortcut,
        .menu-item:focus-visible .menu-shortcut {
            color: #1d4ed8;
        }
        .menu-item.danger:hover .menu-shortcut,
        .menu-item.danger:focus-visible .menu-shortcut {
            color: var(--danger);
        }
        .menu-shortcut { color: #94a3b8; font-size: 12px; transition: color 0.16s ease; }
        .menu-separator { height: 1px; background: rgba(203, 213, 225, 0.45); margin: 4px 6px; }
        .hidden-input { display: none; }
        #saveMenuPanel {
            position: fixed; z-index: 110;
        }
        #saveMenuPanel.visible { display: flex; }
        #alignMenuPanel {
            position: fixed;
            z-index: 110;
            min-width: 280px;
        }
        #alignMenuPanel.visible { display: flex; }
        #layoutMenuPanel {
            position: fixed;
            z-index: 110;
            min-width: 280px;
        }
        #layoutMenuPanel.visible { display: flex; }
        .align-menu-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 6px;
            padding: 8px;
        }
        .align-menu-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .align-menu-btn {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 8px 4px;
            border-radius: 12px;
            border: 1px solid rgba(226, 232, 240, 0.6);
            background: rgba(255, 255, 255, 0.45);
            color: #334155;
            font-size: 11px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
        }
        .align-menu-btn:hover {
            background: #dbeafe;
            border-color: rgba(59, 130, 246, 0.3);
            color: #1d4ed8;
        }
        .align-menu-btn.active {
            background: #dbeafe;
            border-color: rgba(59, 130, 246, 0.4);
            color: #1d4ed8;
        }
        .align-menu-btn.active svg {
            stroke-width: 2.4;
        }
        .align-menu-btn svg {
            width: 20px;
            height: 20px;
            display: block;
        }
        .align-menu-btn svg line,
        .align-menu-btn svg circle,
        .align-menu-btn svg rect,
        .align-menu-btn svg polyline,
        .align-menu-btn svg path {
            stroke: currentColor;
            stroke-width: 1.8;
            stroke-linecap: round;
            stroke-linejoin: round;
            fill: none;
        }
        .align-menu-btn span {
            line-height: 1;
        }

        #analytics-card {
            position: absolute;
            top: 16px;
            right: 16px;
            z-index: 90;
            width: min(290px, calc(100vw - 32px));
            border-radius: 16px;
            border: 1px solid rgba(226, 232, 240, 0.85);
            background: rgba(255, 255, 255, 0.92);
            -webkit-backdrop-filter: blur(24px) saturate(190%);
            backdrop-filter: blur(24px) saturate(190%);
            box-shadow:
                0 10px 25px -5px rgba(15, 23, 42, 0.08),
                0 4px 10px -2px rgba(15, 23, 42, 0.04),
                inset 0 1px 0 rgba(255, 255, 255, 0.95);
            pointer-events: auto;
            box-sizing: border-box;
            overflow: hidden;
            transition: width 0.22s cubic-bezier(0.16, 1, 0.3, 1),
                        border-radius 0.22s cubic-bezier(0.16, 1, 0.3, 1),
                        box-shadow 0.22s ease;
        }
        #analytics-card.analytics-collapsed {
            width: auto;
            border-radius: 999px;
            box-shadow:
                0 4px 14px -2px rgba(15, 23, 42, 0.08),
                inset 0 1px 0 rgba(255, 255, 255, 0.95);
        }
        #analytics-card.analytics-collapsed .analytics-body {
            display: none;
        }
        #analytics-card.analytics-collapsed .analytics-header {
            padding: 7px 12px;
        }
        .analytics-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding: 10px 14px 8px;
            cursor: pointer;
            user-select: none;
        }
        .analytics-heading {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 11px;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: #64748b;
        }
        .analytics-heading-icon {
            color: var(--primary);
            flex-shrink: 0;
        }
        .analytics-toggle-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 22px;
            height: 22px;
            min-width: 22px;
            padding: 0;
            border-radius: 6px;
            border: 1px solid rgba(203, 213, 225, 0.6);
            background: rgba(248, 250, 252, 0.8);
            color: #64748b;
            cursor: pointer;
            box-shadow: none;
            transition: all 0.15s ease;
        }
        .analytics-toggle-btn:hover {
            background: #ffffff;
            color: var(--text-color);
            border-color: #cbd5e1;
        }
        .analytics-toggle-icon {
            transition: transform 0.2s ease;
        }
        #analytics-card.analytics-collapsed .analytics-toggle-icon {
            transform: rotate(180deg);
        }
        .analytics-body {
            padding: 0 14px 12px;
        }
        .analytics-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-color);
            line-height: 1.3;
            margin-bottom: 8px;
            padding-bottom: 6px;
            border-bottom: 1px solid #f1f5f9;
            word-break: break-word;
        }
        .analytics-empty {
            font-size: 12px;
            line-height: 1.45;
            color: #94a3b8;
            padding: 2px 0 4px;
        }
        .analytics-note {
            font-size: 11px;
            line-height: 1.4;
            color: #94a3b8;
            margin-top: 6px;
        }
        .analytics-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 6px;
            margin-bottom: 8px;
        }
        .analytics-stat {
            padding: 8px 10px;
            border-radius: 10px;
            background: #f8fafc;
            border: 1px solid #f1f5f9;
        }
        .analytics-stat.accent {
            background: #f0fdf4;
            border-color: #dcfce7;
        }
        .analytics-stat.accent .analytics-stat-value {
            color: #16a34a;
        }
        .analytics-stat.accent .analytics-stat-label {
            color: #15803d;
        }
        .analytics-stat-label {
            display: block;
            font-size: 10px;
            font-weight: 600;
            letter-spacing: 0.03em;
            text-transform: uppercase;
            color: #64748b;
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .analytics-stat-value {
            display: block;
            font-size: 18px;
            font-weight: 700;
            font-variant-numeric: tabular-nums;
            color: #0f172a;
            line-height: 1.1;
        }
        .metadata-editor {
            margin-top: 8px;
            padding: 10px;
            border-radius: 12px;
            background: #f8fafc;
            border: 1px solid #f1f5f9;
        }
        .metadata-editor[hidden] {
            display: none;
        }
        .metadata-heading {
            margin-bottom: 8px;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: #64748b;
        }
        .metadata-form {
            display: grid;
            gap: 8px;
        }
        .metadata-field {
            display: grid;
            gap: 4px;
        }
        .metadata-field-label {
            font-size: 10px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: #64748b;
        }
        .metadata-price-row {
            display: grid;
            grid-template-columns: 74px minmax(0, 1fr);
            gap: 6px;
        }
        .metadata-input {
            width: 100%;
            box-sizing: border-box;
            min-width: 0;
            height: 32px;
            padding: 0 8px;
            border-radius: 8px;
            border: 1px solid #cbd5e1;
            background: #ffffff;
            color: var(--text-color);
            font: 500 12px/1.2 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            outline: none;
            transition: border-color 0.15s ease, box-shadow 0.15s ease;
        }
        .metadata-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
        }
        .metadata-select {
            cursor: pointer;
        }
        .metadata-input::-webkit-outer-spin-button,
        .metadata-input::-webkit-inner-spin-button {
            -webkit-appearance: none;
            margin: 0;
        }
        .metadata-input[type="number"] {
            -moz-appearance: textfield;
            appearance: textfield;
        }
        #analytics-card.analytics-compact {
            top: 10px;
            right: 10px;
            width: min(280px, calc(100vw - 20px));
        }

@media (max-width: 960px) {
            #toolbarStack {
                width: calc(100vw - 20px);
                gap: 10px;
                bottom: calc(14px + env(safe-area-inset-bottom));
            }
            .floating-bar {
                border-radius: 26px;
                padding: 10px;
            }
            #toolbar {
                width: 100%;
                justify-content: center;
            }
            .toolbar-section-wide,
            .toolbar-section-save {
                flex: 1 1 100%;
                justify-content: center;
                margin-left: 0;
            }
        }

@media (max-width: 680px) {
            #toolbarStack {
                width: calc(100vw - 16px);
                gap: 8px;
                bottom: calc(10px + env(safe-area-inset-bottom));
            }
            .floating-bar {
                padding: 9px;
                border-radius: 24px;
            }
            #toolbar {
                flex-wrap: wrap;
                overflow-x: visible;
                justify-content: center;
                row-gap: 8px;
            }
            #toolbar > .toolbar-section {
                width: auto;
                flex: 0 1 auto;
                justify-content: center;
            }
            #toolbar > .toolbar-section:first-child {
                width: 100%;
                flex: 1 1 100%;
                flex-wrap: wrap;
                justify-content: center;
            }
            #toolbar > .toolbar-section.toolbar-section-wide,
            #toolbar > .toolbar-section.toolbar-section-save {
                width: 100%;
                flex: 1 1 100%;
            }
            .toolbar-section-compact {
                width: auto;
                max-width: 100%;
            }
            #colorTools,
            #formatTools {
                width: 100%;
            }
            #connectionTools {
                width: 100%;
            }
            #colorTools .toolbar-section-compact,
            #formatTools .toolbar-section-compact {
                flex: 1 1 100%;
            }
            #connectionTools .toolbar-section-input {
                flex: 1 1 100%;
                width: 100%;
            }
            .tool-input {
                min-width: 0;
                width: 100%;
            }
            #toolbar .icon-btn {
                width: 38px;
                height: 38px;
                padding: 9px;
            }
            .divider {
                display: none;
            }
            .save-menu-btn {
                width: 100%;
            }
            #analytics-card {
                top: 10px; left: auto; right: 10px; width: min(280px, calc(100vw - 20px));
            }
            #analytics-card.analytics-collapsed {
                width: auto;
            }
            .metadata-price-row {
                grid-template-columns: 1fr;
            }
        }

/* ===== Toast notifications ===== */
.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 20000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: min(360px, calc(100vw - 32px));
    pointer-events: none;
}
.toast {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 12px;
    background: var(--glass-shell-strong);
    border: 1px solid var(--glass-stroke);
    box-shadow: 0 8px 24px var(--glass-shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-size: 13px;
    color: var(--text-color);
    cursor: pointer;
    animation: toast-in 0.25s ease;
    transition: opacity 0.25s ease, transform 0.25s ease;
}
.toast-leaving {
    opacity: 0;
    transform: translateY(-6px);
}
.toast-icon {
    flex: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    color: #ffffff;
}
.toast-info .toast-icon { background: var(--primary); }
.toast-success .toast-icon { background: var(--success); }
.toast-warning .toast-icon { background: var(--warning); }
.toast-error .toast-icon { background: var(--danger); }
.toast-message {
    flex: 1;
    line-height: 1.35;
    overflow-wrap: anywhere;
}
.toast-close {
    flex: none;
    border: 0;
    background: transparent;
    color: #64748b;
    cursor: pointer;
    font-size: 12px;
    padding: 2px 4px;
    border-radius: 6px;
    box-shadow: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    min-width: 0;
}
.toast-close:hover {
    background: rgba(15, 23, 42, 0.08);
    color: var(--text-color);
}
.toast-action {
    flex: none;
    border: 1px solid var(--glass-stroke);
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary);
    cursor: pointer;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 8px;
    box-shadow: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    min-width: 0;
    white-space: nowrap;
}
.toast-action:hover {
    background: rgba(99, 102, 241, 0.2);
}
.toast-action:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
@keyframes toast-in {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Modal dialogs ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 20000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    background: rgba(15, 23, 42, 0.35);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    animation: modal-fade-in 0.2s ease;
}
.modal-closing {
    opacity: 0;
    transition: opacity 0.25s ease;
}
.modal-dialog {
    width: min(420px, calc(100vw - 48px));
    background: #ffffff;
    border-radius: 14px;
    box-shadow: 0 24px 64px rgba(15, 23, 42, 0.25);
    border: 1px solid var(--glass-stroke);
    animation: modal-pop-in 0.2s ease;
    overflow: hidden;
}
.modal-title {
    padding: 16px 20px 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-color);
}
.modal-form {
    padding: 8px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.modal-input {
    width: 100%;
    box-sizing: border-box;
    padding: 9px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-color);
    background: #ffffff;
    outline: none;
}
.modal-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}
/* Footers placed directly under the dialog (not inside .modal-form)
   still need dialog padding so buttons don't sit flush to the edge. */
.modal-dialog > .modal-actions {
    padding: 12px 20px 16px;
}
.modal-btn {
    padding: 7px 16px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid #cbd5e1;
    background: #ffffff;
    color: var(--text-color);
    cursor: pointer;
    transition: background 0.15s ease;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
}
.modal-btn:hover {
    background: #f1f5f9;
}
.modal-btn:active {
    transform: scale(0.97);
}
.modal-btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
}
.modal-btn-primary:hover {
    background: #4f46e5;
}

/* ===== My Diagrams dialog ===== */
.diagrams-dialog {
    width: min(480px, calc(100vw - 48px));
    display: flex;
    flex-direction: column;
    max-height: min(80vh, 640px);
}
.diagrams-dialog .modal-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 4px;
}
.diagrams-dialog .modal-title > span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.new-doc-btn {
    height: 32px;
    min-width: 0;
    padding: 4px 12px;
    font-size: 12px;
    border-radius: 10px;
    flex-shrink: 0;
}
.diagrams-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 320px;
    overflow-y: auto;
    padding: 12px 20px 4px;
    margin: 0;
}
.diagram-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    background: transparent;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}
.diagram-item:hover {
    border-color: #cbd5e1;
    background: #f8fafc;
}
.diagram-item.active {
    border-color: rgba(99, 102, 241, 0.45);
    background: rgba(99, 102, 241, 0.08);
}
.diagram-info {
    flex: 1 1 auto;
    min-width: 0;
    cursor: pointer;
}
.diagram-name {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.diagram-current {
    color: var(--primary);
    font-size: 11px;
    font-weight: 700;
    margin-left: 6px;
    white-space: nowrap;
}
.diagram-meta {
    font-size: 11px;
    color: #64748b;
    margin-top: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.diagram-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}
.diagram-actions .mini-btn {
    height: 30px;
    min-width: 0;
    padding: 4px 10px;
    font-size: 11px;
}
.diagram-actions .danger-btn {
    color: var(--danger, #f43f5e);
}
@keyframes modal-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes modal-pop-in {
    from { opacity: 0; transform: translateY(10px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== UX polish: zoom readout, status chips, snap grid, guides, help ===== */
.zoom-level-btn {
    font-size: 12px;
    font-weight: 700;
    min-width: 52px;
    padding: 0 8px;
}
.icon-btn:disabled,
.layout-btn:disabled {
    opacity: 0.35;
    cursor: default;
}
.icon-btn:disabled:hover {
    background: var(--glass-button);
}
.autosave-status {
    font-size: 11px;
    font-weight: 600;
    color: #64748b;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--glass-button);
    white-space: nowrap;
}
.selection-status {
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(99, 102, 241, 0.12);
    white-space: nowrap;
    align-self: center;
}
.layout-btn.active {
    background: var(--primary);
    color: #ffffff;
}
.swatch-custom {
    padding: 0;
    overflow: hidden;
}
.swatch-custom input[type="color"] {
    width: 100%;
    height: 100%;
    border: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
}
.swatch-custom input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.swatch-custom input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 8px; }
body.connect-mode-active #canvas-viewport {
    cursor: crosshair;
}
.snap-guide-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 40;
    overflow: hidden;
}
.snap-guide {
    position: absolute;
    background: #6366f1;
    box-shadow: 0 0 0 0.5px rgba(255, 255, 255, 0.8);
    z-index: 40;
    pointer-events: none;
}
.snap-guide-v {
    top: 0;
    bottom: 0;
    width: 1px;
}
.snap-guide-h {
    left: 0;
    right: 0;
    height: 1px;
}
.help-overlay {
    position: fixed;
    inset: 0;
    z-index: 20010;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    animation: modal-fade-in 0.2s ease;
}
.help-closing {
    opacity: 0;
    transition: opacity 0.25s ease;
}
.help-panel {
    width: min(540px, calc(100vw - 48px));
    max-height: min(70vh, 560px);
    overflow-y: auto;
    background: #ffffff;
    border-radius: 14px;
    box-shadow: 0 24px 64px rgba(15, 23, 42, 0.25);
    border: 1px solid var(--glass-stroke);
    animation: modal-pop-in 0.2s ease;
}
.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 8px;
}
.help-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-color);
}
.help-grid {
    display: grid;
    grid-template-columns: 1fr;
    padding: 4px 20px 18px;
    gap: 2px;
}
.help-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    padding: 6px 4px;
    border-bottom: 1px solid #f1f5f9;
    font-size: 13px;
}
.help-row:last-child {
    border-bottom: 0;
}
.help-keys {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    padding: 2px 8px;
    color: #334155;
    white-space: nowrap;
}
.help-label {
            color: #475569;
            text-align: right;
        }

/* ===== Fullscreen mode ===== */
.app-fullscreen #analytics-card {
    display: none !important;
}

/* ===== Print stylesheet ===== */
@media print {
    body, html {
        overflow: visible !important;
        background-color: #ffffff !important;
    }

    #toolbarStack,
    #toolbar,
    #connectionTools,
    #colorTools,
    #formatTools,
    #tableTools,
    #saveMenuPanel,
    #alignMenuPanel,
    #context-menu,
    #analytics-card,
    .toast-container,
    .toast,
    .modal-overlay,
    .help-overlay,
    .snap-guide-overlay,
    #selection-box,
    #connectionLabelEditor,
    .node-resize-handle,
    .collapse-btn {
        display: none !important;
    }

    #canvas-viewport {
        position: static !important;
        width: auto !important;
        height: auto !important;
        overflow: visible !important;
        background-color: #ffffff !important;
    }

    #canvas-content {
        position: static !important;
        width: auto !important;
        height: auto !important;
        transform: none !important;
    }

    #svg-layer {
        position: static !important;
        width: auto !important;
        height: auto !important;
    }

    #bg-grid {
        display: none !important;
    }

    .node {
        box-shadow: none !important;
    }

    .canvas-table {
        box-shadow: none !important;
    }
}

/* Document Header & Switcher */
.doc-header {
    position: absolute;
    top: 14px;
    left: 16px;
    z-index: 90;
}

.doc-menu-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 20px;
    background: var(--glass-shell-strong);
    border: 1px solid var(--glass-stroke);
    box-shadow: 0 4px 14px var(--glass-shadow);
    backdrop-filter: blur(20px) saturate(180%);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.doc-menu-btn:hover {
    background: var(--glass-button-hover);
    transform: translateY(-1px);
}

.doc-menu-btn:active {
    transform: scale(0.97);
}

/* Keep the label above the global glass gloss layer. */
.doc-menu-btn > span {
    position: relative;
    z-index: 1;
}

.doc-app-name {
    font-weight: 700;
    letter-spacing: -0.01em;
}

.doc-separator {
    opacity: 0.4;
    font-weight: 400;
}

.doc-title-label {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Quick-Add Directional Node Handles */
.quick-add-container {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 45;
}

.quick-add-btn {
    position: absolute;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: auto;
    transition: transform 0.15s ease, background 0.15s ease;
    padding: 0;
}

.quick-add-btn:hover {
    transform: scale(1.18);
    background: #4f46e5;
}

.quick-add-btn:active {
    transform: scale(0.95);
}

/* Canvas Find / Search Bar */
.canvas-search-bar {
    position: absolute;
    top: 14px;
    right: 16px;
    z-index: 120;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 24px;
    background: var(--glass-shell-strong);
    border: 1px solid var(--glass-stroke);
    box-shadow: 0 10px 25px -5px var(--glass-shadow);
    backdrop-filter: blur(24px) saturate(180%);
    color: var(--text-color);
    animation: fadeInSlideDown 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInSlideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.canvas-search-input {
    border: none;
    background: transparent;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-color);
    outline: none;
    width: 150px;
}

.canvas-search-count {
    font-size: 11px;
    font-weight: 700;
    color: #64748b;
    min-width: 28px;
    text-align: center;
}

.search-nav-btn, .search-close-btn {
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: var(--text-color);
    cursor: pointer;
    transition: background 0.15s ease;
}

.search-nav-btn:hover, .search-close-btn:hover {
    background: rgba(0, 0, 0, 0.12);
}

.search-highlight {
    outline: 2px solid rgba(99, 102, 241, 0.5) !important;
    outline-offset: 3px;
}

.search-highlight-active {
    outline: 3px solid var(--primary) !important;
    outline-offset: 4px;
    animation: pulseHighlight 1.5s infinite;
}

@keyframes pulseHighlight {
    0%, 100% { outline-color: var(--primary); }
    50% { outline-color: rgba(99, 102, 241, 0.3); }
}

/* Dark Mode Theme */
body.theme-dark {
    --primary: #818cf8;
    --bg-color: #0b0f19;
    --grid-color: #1e293b;
    --node-bg: #1e293b;
    --text-color: #f1f5f9;
    --glass-shell: rgba(15, 23, 42, 0.72);
    --glass-shell-strong: rgba(30, 41, 59, 0.85);
    --glass-stroke: rgba(255, 255, 255, 0.12);
    --glass-shadow: rgba(0, 0, 0, 0.45);
    --glass-button: rgba(255, 255, 255, 0.08);
    --glass-button-hover: rgba(255, 255, 255, 0.16);
    --glass-button-active: rgba(255, 255, 255, 0.24);
    --liquid-bar-base: rgba(15, 23, 42, 0.6);
    --liquid-bar-edge: rgba(255, 255, 255, 0.15);
    --liquid-bar-shadow: rgba(0, 0, 0, 0.35);
}

body.theme-dark .node {
    background-color: #1e293b;
    color: #f1f5f9;
    border-color: #334155;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

body.theme-dark .node.selected,
body.theme-dark .table-wrapper.selected {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 2px var(--primary), 0 8px 24px rgba(0, 0, 0, 0.4) !important;
}

body.theme-dark .node-group {
    background: rgba(30, 41, 59, 0.35) !important;
    border-color: #475569 !important;
}

body.theme-dark .table-wrapper {
    background-color: #1e293b;
    border-color: #334155;
    color: #f1f5f9;
}

body.theme-dark .table-wrapper table th {
    background: #0f172a;
    color: #cbd5e1;
}

body.theme-dark .table-wrapper table td {
    background: #1e293b;
    color: #f1f5f9;
    border-color: #334155;
}

body.theme-dark .table-wrapper table th,
body.theme-dark .table-wrapper table td {
    border-color: #334155;
}

body.theme-dark .floating-bar {
    background: rgba(15, 23, 42, 0.85);
    border-color: rgba(255, 255, 255, 0.12);
    color: #f1f5f9;
}

body.theme-dark .menu-panel {
    background: rgba(15, 23, 42, 0.95);
    border-color: rgba(255, 255, 255, 0.12);
    color: #f1f5f9;
}

body.theme-dark .menu-item {
    color: #e2e8f0;
}

body.theme-dark .menu-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

body.theme-dark .straight-line {
    stroke: #94a3b8;
}

body.theme-dark .straight-line.dependency-line {
    stroke: #f43f5e;
}

body.theme-dark .analytics-card {
    background: rgba(15, 23, 42, 0.85);
    border-color: rgba(255, 255, 255, 0.12);
    color: #f1f5f9;
}

body.theme-dark .analytics-row {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

body.theme-dark .search-nav-btn,
body.theme-dark .search-close-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #f1f5f9;
}

body.theme-dark .search-nav-btn:hover,
body.theme-dark .search-close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

body.theme-dark .connection-label-editor {
    background: #1e293b;
    color: #f1f5f9;
    border-color: #475569;
}

body.theme-dark .node-resize-handle {
    background:
        linear-gradient(135deg, transparent 0 42%, rgba(203, 213, 225, 0.85) 42% 50%, transparent 50% 60%, rgba(203, 213, 225, 0.85) 60% 68%, transparent 68% 100%),
        #1e293b;
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

body.theme-dark .modal-dialog,
body.theme-dark .help-panel {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.12);
    color: #f1f5f9;
}

body.theme-dark .modal-input {
    background: #0f172a;
    border-color: #334155;
    color: #f1f5f9;
}

body.theme-dark .modal-btn {
    background: #0f172a;
    border-color: #334155;
    color: #f1f5f9;
}

body.theme-dark .modal-btn:hover {
    background: #1e293b;
}

body.theme-dark .modal-btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #0b0f19;
}

body.theme-dark .modal-btn-primary:hover {
    background: #a5b4fc;
}

body.theme-dark .diagram-item {
    border-color: #334155;
}

body.theme-dark .diagram-item:hover {
    border-color: #475569;
    background: rgba(255, 255, 255, 0.04);
}

body.theme-dark .diagram-item.active {
    border-color: rgba(129, 140, 248, 0.55);
    background: rgba(129, 140, 248, 0.12);
}

body.theme-dark .diagram-meta {
    color: #94a3b8;
}