:root {
    --demo-bg: #eef5ff;
    --demo-panel: #ffffff;
    --demo-panel-soft: #f7fbff;
    --demo-text: #19212b;
    --demo-muted: #5f7386;
    --demo-line: #d7e4ee;
    --demo-accent: var(--suite-accent);
    --demo-accent-strong: var(--suite-accent-strong);
    --demo-shadow: 0 18px 36px rgba(19, 48, 73, 0.1);
    --bg: var(--demo-bg);
    --panel: var(--demo-panel);
    --ink: var(--demo-text);
    --muted: var(--demo-muted);
    --line: var(--demo-line);
    --accent: var(--demo-accent);
    --accent-strong: var(--demo-accent-strong);
    --accent-soft: var(--demo-accent-soft);
    --accent-surface: var(--demo-accent-surface);
    --accent-surface-strong: var(--demo-accent-surface-strong);
    --accent-text: var(--demo-accent-text);
    --todo: color-mix(in srgb, #b45309 72%, var(--accent) 28%);
    --in-progress: color-mix(in srgb, var(--accent) 82%, var(--ink) 18%);
    --review: color-mix(in srgb, var(--accent-strong) 70%, #a21caf 30%);
    --done: color-mix(in srgb, #15803d 80%, var(--accent) 20%);
    --danger: #b91c1c;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--ink);
    font: 15px/1.45 "Inter", "Trebuchet MS", sans-serif;
    background:
    radial-gradient(1300px 560px at -10% -10%, color-mix(in srgb, var(--accent) 12%, transparent) 0%, transparent 50%),
    radial-gradient(1000px 530px at 110% -20%, color-mix(in srgb, var(--accent-strong) 12%, transparent) 0%, transparent 52%),
    radial-gradient(700px 220px at 50% 0%, color-mix(in srgb, var(--accent) 8%, white) 0%, transparent 70%),
        var(--bg);
}

.hero {
    margin-bottom: 20px;
}

h1 {
    letter-spacing: -0.02em;
}

.reset-chip {
    margin-bottom: 12px;
}

.reset-chip strong {
    letter-spacing: 0.03em;
    font-variant-numeric: tabular-nums;
}

.card,
.column,
dialog {
    background: linear-gradient(180deg, var(--accent-surface), var(--panel));
}

.metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 14px;
}

.metric {
    padding: 13px;
    transform: translateY(0);
    transition: transform 180ms ease, box-shadow 180ms ease;
}

.metric:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 22px var(--demo-accent-glow);
}

.metric.total .value,
.metric.due .value {
    color: var(--accent-text);
}

.metric.review .value {
    color: var(--review);
}

.metric .label { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.metric .value { font-size: 30px; font-weight: 700; }
.metric.overdue .value { color: var(--danger); }

.filters { padding: 12px; margin-bottom: 14px; }
.filters .row { display: flex; flex-wrap: wrap; gap: 8px; align-items: end; }
.filters label { display: grid; gap: 4px; font-size: 13px; }
select, input[type="text"], input[type="datetime-local"], textarea {
    width: 100%;
}

select:focus,
input[type="text"]:focus,
input[type="datetime-local"]:focus,
textarea:focus {
    outline: none;
}

.timeline-wrap { margin-top: 12px; }
.timeline-wrap h3 { margin: 0 0 8px; font-size: 14px; }
.timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(85px, 1fr));
    gap: 6px;
}
.timeline-cell {
    border: 1px dashed color-mix(in srgb, var(--accent) 28%, transparent);
    border-radius: 8px;
    padding: 6px;
    text-align: center;
    background: var(--accent-surface);
}
.timeline-cell .day { font-size: 12px; }
.timeline-cell .count { font-weight: 700; color: var(--accent-text); }

.board {
    display: grid;
    grid-template-columns: repeat(4, minmax(240px, 1fr));
    gap: 12px;
}

.column {
    min-height: 360px;
    padding: 10px;
    background:
        linear-gradient(180deg, var(--accent-surface), var(--panel)),
        repeating-linear-gradient(0deg, color-mix(in srgb, var(--accent) 10%, transparent), color-mix(in srgb, var(--accent) 10%, transparent) 1px, transparent 1px, transparent 18px);
    animation: riseIn 420ms ease both;
}

.column.drop-target {
    outline: 2px dashed var(--accent);
    outline-offset: 2px;
    transform: translateY(-2px);
}

.column.todo-col { border-top: 4px solid var(--todo); }
.column.in-progress-col { border-top: 4px solid var(--in-progress); }
.column.review-col { border-top: 4px solid var(--review); }
.column.done-col { border-top: 4px solid var(--done); }

.column-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.column-title { margin: 0; font-size: 15px; }
.column-count {
    font-size: 12px;
    border-radius: 999px;
    padding: 3px 8px;
}

.cards { min-height: 240px; display: grid; gap: 8px; }

.cards.empty::after {
    content: 'Drop cards here';
    color: var(--muted);
    border: 1px dashed color-mix(in srgb, var(--accent) 24%, transparent);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
    background: color-mix(in srgb, var(--accent) 8%, var(--panel));
}

.item {
    border-radius: 10px;
    border-left: 5px solid #9ca3af;
    border: 1px solid var(--demo-line);
    background: linear-gradient(180deg, var(--panel), var(--accent-surface-strong));
    padding: 10px;
    cursor: grab;
    transform: translateY(0);
    transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
    animation: cardIn 320ms ease both;
    animation-delay: calc(var(--stagger, 0) * 30ms);
}

.item.todo { border-left-color: var(--todo); }
.item.in_progress { border-left-color: var(--in-progress); }
.item.review { border-left-color: var(--review); }
.item.done { border-left-color: var(--done); }
.item.overdue { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--danger) 70%, transparent); }
.item:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px var(--demo-accent-glow);
}
.item:active { cursor: grabbing; }

.item.is-dragging {
    opacity: 0.55;
    transform: scale(0.98);
}

.item h4 { margin: 0 0 8px; font-size: 15px; }
.meta { display: flex; flex-wrap: wrap; gap: 6px; font-size: 12px; color: var(--muted); }
.badge {
    padding: 1px 8px;
}
.assignee-dot {
    display: inline-block;
    width: 9px;
    height: 9px;
    border-radius: 999px;
    margin-right: 5px;
    vertical-align: middle;
}

.btn {
    transition: transform 120ms ease, box-shadow 120ms ease, background-color 120ms ease;
}
.btn-primary {
    background: linear-gradient(180deg, var(--accent), var(--accent-strong));
}

.status { min-height: 22px; margin-top: 10px; font-weight: 600; }

dialog {
    width: min(760px, 95vw);
    padding: 0;
}

dialog::backdrop {
    background:
    radial-gradient(circle at 20% 10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 42%),
        rgba(7, 19, 35, 0.58);
}

.item-form { padding: 14px; display: grid; gap: 10px; }
.item-form h2 { margin: 0; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.color-row { display: flex; gap: 8px; align-items: center; }
.color-row input[type="color"] {
    width: 42px;
    height: 34px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 0;
    background: var(--panel);
}

.modal-panel {
    border-radius: 10px;
    padding: 8px;
    background: linear-gradient(180deg, var(--accent-surface-strong), var(--accent-surface));
}
.modal-panel h3 { margin: 2px 0 8px; font-size: 14px; }
.security-note {
    margin: 0 0 8px;
    padding: 8px 10px;
    border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent);
    border-radius: 8px;
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    color: var(--accent-text);
    font-size: 13px;
}
.inline-form { display: grid; grid-template-columns: 1fr auto; gap: 6px; }
.list {
    margin: 8px 0 0;
    padding-left: 16px;
    max-height: 150px;
    overflow: auto;
}
.list li { margin-bottom: 6px; font-size: 14px; }

.status {
    color: var(--accent-text);
}

menu {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin: 6px 0 0;
    padding: 0;
}

@keyframes cardIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes riseIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1024px) {
    .board { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
    .hero { flex-direction: column; align-items: start; }
    .board { grid-template-columns: 1fr; }
    .metrics { grid-template-columns: 1fr; }
    .two-col { grid-template-columns: 1fr; }
    .inline-form { grid-template-columns: 1fr; }
    .hero-actions { margin-top: 0.8rem; }
}