:root {
            --bg: #0f172a;
            /* slate-900 */
            --bg-muted: #0b1228;
            --card: #111827;
            /* gray-900 */
            --card-2: #0b132a;
            --text: #e5e7eb;
            /* gray-200 */
            --text-muted: #9ca3af;
            /* gray-400 */
            --primary: #7c3aed;
            /* violet-600 */
            --primary-2: #8b5cf6;
            /* violet-500 */
            --accent: #22d3ee;
            /* cyan-400 */
            --success: #34d399;
            /* emerald-400 */
            --danger: #ef4444;
            /* red-500 */
            --warning: #f59e0b;
            /* amber-500 */
            --border: #1f2937;
            /* gray-800 */
            --shadow: 0 8px 30px rgba(0, 0, 0, .35);
            --radius: 14px;
            --radius-sm: 10px;
            --ring: 0 0 0 3px color-mix(in oklab, var(--primary) 35%, transparent);
            color-scheme: dark;
        }

        [data-theme="light"] {
            --bg: #f8fafc;
            /* slate-50 */
            --bg-muted: #f1f5f9;
            /* slate-100 */
            --card: #ffffff;
            /* white */
            --card-2: #f8fafc;
            --text: #0f172a;
            /* slate-900 */
            --text-muted: #475569;
            /* slate-600 */
            --primary: #6d28d9;
            /* violet-700 */
            --primary-2: #7c3aed;
            /* violet-600 */
            --accent: #0ea5e9;
            /* sky-500 */
            --success: #059669;
            /* emerald-600 */
            --danger: #dc2626;
            /* red-600 */
            --warning: #d97706;
            /* amber-600 */
            --border: #e5e7eb;
            /* gray-200 */
            --shadow: 0 8px 30px rgba(2, 6, 23, .08);
            color-scheme: light;
        }

        * {
            box-sizing: border-box
        }

        html,
        body {
            height: 100%
        }

        body {
            margin: 0;
            font: 16px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
            background:
                radial-gradient(1200px 600px at 10% -10%, color-mix(in oklab, var(--primary) 12%, transparent), transparent 60%),
                radial-gradient(1000px 500px at 120% 10%, color-mix(in oklab, var(--accent) 10%, transparent), transparent 70%),
                var(--bg);
            color: var(--text);
        }

        .app {
            max-width: 900px;
            margin: 0 auto;
            padding: 24px;
        }

        header.app-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 18px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo {
            width: 36px;
            height: 36px;
            display: grid;
            place-items: center;
            border-radius: 10px;
            background: linear-gradient(145deg, color-mix(in oklab, var(--primary) 45%, transparent), color-mix(in oklab, var(--accent) 30%, transparent));
            box-shadow: var(--shadow);
        }

        h1 {
            font-size: 22px;
            margin: 0;
            letter-spacing: .2px;
        }

        .badge {
            color: var(--text-muted);
            border: 1px solid var(--border);
            background: var(--card);
            padding: 2px 8px;
            border-radius: 999px;
            font-size: 12px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        button.icon {
            display: inline-grid;
            place-items: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            color: var(--text);
            border: 1px solid var(--border);
            background: linear-gradient(180deg, var(--card), color-mix(in oklab, var(--card) 80%, #000 20%));
            transition: transform .15s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
            cursor: pointer;
        }

        button.icon:hover {
            transform: translateY(-1px);
            border-color: color-mix(in oklab, var(--border) 40%, var(--primary) 60%);
        }

        button.icon:active {
            transform: translateY(0);
        }

        button.icon:focus-visible {
            outline: none;
            box-shadow: var(--ring);
        }

        /* Controls */
        .controls {
            background: linear-gradient(180deg, var(--card), color-mix(in oklab, var(--card) 80%, #000 20%));
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px;
            box-shadow: var(--shadow);
        }

        form#addForm {
            display: grid;
            grid-template-columns: 1fr auto auto auto;
            gap: 10px;
        }

        @media (max-width: 720px) {
            form#addForm {
                grid-template-columns: 1fr 1fr auto;
            }

            .hide-mobile {
                display: none
            }
        }

        .input,
        .date,
        .select,
        .btn {
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--card-2);
            color: var(--text);
            padding: 12px 12px;
            font-size: 15px;
            transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
        }

        .input::placeholder {
            color: var(--text-muted)
        }

        .input:focus,
        .date:focus,
        .select:focus {
            outline: none;
            border-color: color-mix(in oklab, var(--border) 30%, var(--primary) 70%);
            box-shadow: var(--ring);
        }

        .btn {
            cursor: pointer;
            background: linear-gradient(145deg, var(--primary), var(--primary-2));
            border-color: transparent;
            font-weight: 600;
        }

        .btn:hover {
            filter: saturate(1.08) brightness(1.03)
        }

        .btn:active {
            transform: translateY(1px)
        }

        .btn.secondary {
            background: transparent;
            border: 1px solid var(--border);
        }

        .filters {
            margin-top: 12px;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 10px;
            align-items: center;
        }

        .left,
        .right {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .tabs {
            display: flex;
            gap: 6px;
        }

        .tab {
            padding: 8px 12px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: var(--card-2);
            color: var(--text);
            font-size: 14px;
            cursor: pointer;
        }

        .tab.active {
            background: color-mix(in oklab, var(--primary) 28%, var(--card-2) 72%);
            border-color: color-mix(in oklab, var(--border) 25%, var(--primary) 75%);
        }

        .count {
            color: var(--text-muted);
            font-size: 14px;
        }

        .search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .search svg {
            position: absolute;
            left: 10px;
            width: 16px;
            height: 16px;
            color: var(--text-muted);
        }

        #searchInput {
            padding-left: 32px;
        }

        /* List */
        ul#todoList {
            list-style: none;
            margin: 16px 0 0 0;
            padding: 0;
            display: grid;
            gap: 10px;
        }

        li.todo {
            display: grid;
            grid-template-columns: auto 1fr auto;
            align-items: center;
            gap: 10px;
            padding: 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: linear-gradient(180deg, var(--card), color-mix(in oklab, var(--card) 80%, #000 20%));
            transition: border-color .2s ease, transform .15s ease, background .2s ease;
        }

        li.todo:hover {
            border-color: color-mix(in oklab, var(--border) 40%, var(--primary) 60%);
        }

        li.todo.dragging {
            opacity: .9;
            transform: scale(.995) rotate(-.2deg);
            border-style: dashed;
        }

        .drag {
            display: inline-grid;
            place-items: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            border: 1px dashed var(--border);
            background: transparent;
            color: var(--text-muted);
            cursor: grab;
        }

        .drag:active {
            cursor: grabbing
        }

        .checkbox {
            position: relative;
            width: 22px;
            height: 22px;
        }

        .checkbox input {
            appearance: none;
            width: 22px;
            height: 22px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--card-2);
            display: grid;
            place-items: center;
            cursor: pointer;
            transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
        }

        .checkbox input:focus-visible {
            outline: none;
            box-shadow: var(--ring)
        }

        .checkbox input:checked {
            background: linear-gradient(145deg, var(--success), color-mix(in oklab, var(--success) 60%, var(--accent) 40%));
            border-color: transparent;
        }

        .checkbox input:checked::after {
            content: "";
            width: 10px;
            height: 6px;
            border: 2px solid #0b111d;
            border-top: none;
            border-right: none;
            transform: rotate(-45deg);
            margin-top: -1px;
        }

        .content {
            display: grid;
            gap: 2px;
        }

        .title {
            outline: none;
            padding: 6px 8px;
            border-radius: 8px;
            transition: background .15s ease, box-shadow .2s ease;
        }

        .title[contenteditable="true"]:focus {
            background: var(--bg-muted);
            box-shadow: var(--ring);
        }

        .completed .title {
            text-decoration: line-through;
            color: var(--text-muted);
        }

        .meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .due {
            font-size: 12px;
            padding: 6px 8px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: var(--card-2);
            color: var(--text);
            width: 140px;
        }

        .due.overdue:not(:focus) {
            border-color: color-mix(in oklab, var(--danger) 60%, var(--border) 40%);
            background: color-mix(in oklab, var(--danger) 12%, var(--card-2) 88%);
        }

        .due:focus {
            box-shadow: var(--ring);
            outline: none;
        }

        .chip {
            padding: 4px 8px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: var(--card-2);
        }

        .actions {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .delete {
            display: inline-grid;
            place-items: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: transparent;
            color: var(--text-muted);
            cursor: pointer;
            transition: border-color .2s ease, background .2s ease, color .2s ease, transform .15s ease;
        }

        .delete:hover {
            border-color: color-mix(in oklab, var(--danger) 70%, var(--border) 30%);
            color: var(--danger);
            transform: translateY(-1px)
        }

        .delete:active {
            transform: translateY(0)
        }

        .empty {
            margin: 18px 0 0 0;
            padding: 24px;
            border-radius: var(--radius);
            border: 1px dashed var(--border);
            color: var(--text-muted);
            text-align: center;
            background: linear-gradient(180deg, var(--card), color-mix(in oklab, var(--card) 80%, #000 20%));
        }

        .hint {
            color: var(--text-muted);
            font-size: 12px;
            margin-top: 8px;
        }

        /* Small shake on invalid */
        @keyframes shake {

            10%,
            90% {
                transform: translateX(-1px)
            }

            20%,
            80% {
                transform: translateX(2px)
            }

            30%,
            50%,
            70% {
                transform: translateX(-4px)
            }

            40%,
            60% {
                transform: translateX(4px)
            }
        }

        .shake {
            animation: shake .35s cubic-bezier(.36, .07, .19, .97) both;
        }