/* Quiet, dense, neutral: zinc greys, hairline borders, one accent used sparingly. */
:root {
  --bg: #fafafa;
  --col: #f4f4f5;
  --card: #ffffff;
  --card-hover: #fafafa;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --fg: #18181b;
  --fg-2: #52525b;
  --muted: #a1a1aa;
  --accent: #5e6ad2;
  --accent-soft: rgba(94, 106, 210, .12);
  --star: #e2a516;
  --danger: #e5484d;
  --ok: #30a46c;
  --shadow: 0 1px 2px rgba(0, 0, 0, .04);
  --shadow-lift: 0 8px 24px rgba(0, 0, 0, .12), 0 1px 3px rgba(0, 0, 0, .08);
  --scrim: rgba(9, 9, 11, .28);
  --r: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0b;
    --col: #111113;
    --card: #18181b;
    --card-hover: #1e1e22;
    --border: #232327;
    --border-strong: #2e2e33;
    --fg: #ededef;
    --fg-2: #a1a1aa;
    --muted: #63636b;
    --accent: #7c85e0;
    --accent-soft: rgba(124, 133, 224, .16);
    --star: #e8b33a;
    --shadow: none;
    --shadow-lift: 0 12px 32px rgba(0, 0, 0, .5), 0 0 0 1px #2e2e33;
    --scrim: rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--fg); font: 13px/1.45 var(--font);
  -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent;
  display: flex; flex-direction: column; overflow: hidden;
}
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; flex: none; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* Top bar */
.bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  height: 48px; padding: 0 16px; padding-top: env(safe-area-inset-top); box-sizing: content-box;
  border-bottom: 1px solid var(--border); flex: none;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; letter-spacing: -.01em; }
.mark { width: 20px; height: 20px; }
.mark rect { fill: var(--fg); stroke: none; }
.mark path { stroke: var(--bg); stroke-width: 2.4; }
.bar-right { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  width: 30px; height: 30px; display: grid; place-items: center; border-radius: 6px; color: var(--fg-2);
}
.icon-btn:hover { background: var(--col); color: var(--fg); }
.icon-btn[aria-pressed="true"] { color: var(--star); background: var(--col); }
.icon-btn[aria-pressed="true"] svg { fill: currentColor; }
.sync { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; padding: 0 4px; }
.sync::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--ok); opacity: .8; }
.sync.pending::before { background: var(--muted); }
.sync.busy::before { background: var(--accent); animation: pulse 1s ease-in-out infinite; }
.sync.offline::before { background: transparent; box-shadow: inset 0 0 0 1.5px var(--muted); }
.sync.error::before { background: var(--danger); }
@keyframes pulse { 50% { opacity: .25; } }

/* Board */
.board {
  flex: 1; display: flex; gap: 12px; padding: 16px; overflow-x: auto; overflow-y: hidden; align-items: flex-start;
}
.col {
  width: 272px; flex: none; max-height: 100%; display: flex; flex-direction: column;
  background: var(--col); border: 1px solid var(--border); border-radius: 10px;
}
.col-head { display: flex; align-items: center; gap: 8px; padding: 10px 8px 6px 12px; }
.col-name { font-weight: 600; font-size: 13px; letter-spacing: -.005em; }
.count { color: var(--muted); font-variant-numeric: tabular-nums; }
.col-head .spacer { flex: 1; }
.col-head .icon-btn { width: 26px; height: 26px; color: var(--muted); }
.col-head .icon-btn:hover { color: var(--fg); background: var(--border); }
.col-head .icon-btn.on { color: var(--accent); }
.col-scroll { overflow-y: auto; padding: 2px 8px 8px; display: flex; flex-direction: column; gap: 6px; min-height: 0; }
.cards { display: flex; flex-direction: column; gap: 6px; min-height: 8px; }
.empty { color: var(--muted); padding: 8px 4px; font-size: 12px; }

.add {
  width: 100%; border: 1px solid var(--accent); border-radius: var(--r); background: var(--card);
  padding: 9px 10px; outline: none; box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Card */
.card {
  display: grid; grid-template-columns: 18px 1fr auto; gap: 2px 10px; align-items: start;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r);
  padding: 9px 8px 9px 10px; box-shadow: var(--shadow); cursor: pointer; user-select: none; -webkit-user-select: none;
  -webkit-touch-callout: none; transition: opacity .2s, transform .2s;
}
.card:hover { background: var(--card-hover); border-color: var(--border-strong); }
.card .title { grid-column: 2; grid-row: 1; overflow-wrap: anywhere; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card .meta { grid-column: 2; grid-row: 2; display: flex; align-items: center; gap: 8px; min-width: 0; color: var(--fg-2); font-size: 12px; }
.card .meta:empty { display: none; }
.card .note { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.due { display: inline-flex; align-items: center; gap: 4px; flex: none; font-variant-numeric: tabular-nums; }
.due svg { width: 12px; height: 12px; }
.due.today { color: var(--fg); font-weight: 600; }
.due.over { color: var(--danger); }
.check {
  grid-column: 1; grid-row: 1; width: 16px; height: 16px; margin-top: 1.5px; border-radius: 50%;
  border: 1.5px solid var(--border-strong); display: grid; place-items: center; color: transparent;
}
.check svg { width: 10px; height: 10px; stroke-width: 3; }
.check:hover { border-color: var(--fg-2); color: var(--fg-2); }
.check.cycle { border: 0; color: var(--muted); }
.check.cycle svg { width: 14px; height: 14px; stroke-width: 2; }
.check.cycle:hover { color: var(--accent); }
.check.spin svg { animation: spin .5s ease; }
@keyframes spin { to { transform: rotate(360deg); } }
.star { grid-column: 3; grid-row: 1; color: var(--muted); opacity: 0; width: 20px; height: 20px; display: grid; place-items: center; margin: -1px -2px 0 0; }
.star svg { width: 14px; height: 14px; }
.card:hover .star, .star.on { opacity: 1; }
.star.on { color: var(--star); }
.star.on svg { fill: currentColor; }
.card.leaving { opacity: 0; transform: translateX(8px); }

.done .card { background: transparent; box-shadow: none; }
.done .card .title { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--border-strong); }
.done .check { background: var(--fg-2); border-color: var(--fg-2); color: var(--card); }
.done-toggle {
  display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; padding: 6px 4px 2px; width: 100%;
}
.done-toggle:hover { color: var(--fg-2); }
.done-toggle svg { width: 12px; height: 12px; transition: transform .15s; }
.done-toggle[aria-expanded="true"] svg { transform: rotate(90deg); }

/* Dragging */
.sortable-ghost { opacity: .35; }
.sortable-chosen { cursor: grabbing; }
.sortable-drag, .sortable-fallback { box-shadow: var(--shadow-lift) !important; transform: rotate(1.5deg); opacity: 1 !important; }

/* Details panel */
.scrim { position: fixed; inset: 0; background: var(--scrim); z-index: 10; animation: fade .15s; }
.panel {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(440px, 100vw); z-index: 11;
  background: var(--card); border-left: 1px solid var(--border); box-shadow: var(--shadow-lift);
  display: flex; flex-direction: column; animation: slide .18s cubic-bezier(.2, .8, .2, 1);
  padding-top: env(safe-area-inset-top);
}
@keyframes fade { from { opacity: 0; } }
@keyframes slide { from { transform: translateX(24px); opacity: 0; } }
.panel-head { display: flex; align-items: center; gap: 4px; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.panel-head .where { flex: 1; color: var(--fg-2); font-size: 12px; padding-left: 4px; }
.panel-body { flex: 1; overflow-y: auto; padding: 18px 20px 24px; display: flex; flex-direction: column; gap: 14px; }
.p-title, .p-notes {
  width: 100%; border: 0; background: none; resize: none; outline: none; padding: 0; overflow: hidden;
}
.p-title { font-size: 18px; font-weight: 600; letter-spacing: -.015em; line-height: 1.35; }
.p-notes { min-height: 80px; color: var(--fg); line-height: 1.55; }
.p-notes::placeholder, .p-title::placeholder { color: var(--muted); }
.links { display: flex; flex-direction: column; gap: 4px; margin-top: -6px; }
.links a { color: var(--accent); text-decoration: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12px; }
.links a:hover { text-decoration: underline; }
.props { display: grid; grid-template-columns: 84px 1fr; gap: 6px 8px; align-items: center; border-top: 1px solid var(--border); padding-top: 14px; }
.props > label { color: var(--muted); font-size: 12px; }
.row { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; min-height: 30px; }
.field, .chip {
  height: 28px; border: 1px solid var(--border); border-radius: 6px; background: var(--card); padding: 0 8px;
}
.field:hover, .chip:hover { border-color: var(--border-strong); }
select.field { padding-right: 4px; }
input.field[type="date"] { width: 124px; padding: 0 6px; }
.props .row:has(input[type="date"]) { flex-wrap: nowrap; }
input.num { width: 52px; }
.chip { display: inline-flex; align-items: center; gap: 6px; color: var(--fg-2); font-size: 12px; }
.chip.on { color: var(--star); }
.chip.on svg { fill: currentColor; }
.chip svg { width: 13px; height: 13px; }
.panel-foot { display: flex; gap: 8px; padding: 12px 20px calc(12px + env(safe-area-inset-bottom)); border-top: 1px solid var(--border); }
.btn {
  height: 30px; padding: 0 12px; border-radius: 6px; border: 1px solid var(--border); display: inline-flex; align-items: center; gap: 6px;
  color: var(--fg-2); font-weight: 500;
}
.btn:hover { background: var(--col); color: var(--fg); }
.btn.danger:hover { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.btn svg { width: 14px; height: 14px; }
.panel-foot .spacer { flex: 1; }

.locked { position: fixed; inset: 0; display: grid; place-content: center; justify-items: center; gap: 10px; color: var(--muted); background: var(--bg); }
.locked svg { width: 22px; height: 22px; }

/* Phone: one list at a time, tabs on top */
.tabs { display: none; }
.fab { display: none; }
@media (max-width: 760px) {
  body { font-size: 15px; }
  .bar { height: 44px; }
  .tabs {
    display: flex; gap: 4px; padding: 8px 12px; overflow-x: auto; flex: none; scrollbar-width: none;
    border-bottom: 1px solid var(--border);
  }
  .tabs::-webkit-scrollbar { display: none; }
  .tab {
    flex: none; height: 32px; padding: 0 12px; border-radius: 16px; display: flex; align-items: center; gap: 6px;
    color: var(--fg-2); font-weight: 500; font-size: 14px; white-space: nowrap; border: 1px solid transparent;
  }
  .tab .count { font-size: 12px; }
  .tab.on { background: var(--card); border-color: var(--border); color: var(--fg); box-shadow: var(--shadow); }
  .tab.drop { border-color: var(--accent); background: var(--accent-soft); color: var(--fg); }
  .tab .card { display: none; }
  .board { padding: 0; overflow: hidden; }
  .col { width: 100%; height: 100%; max-height: none; border: 0; border-radius: 0; background: transparent; }
  .col:not(.on) { display: none; }
  .col-head { padding: 12px 12px 4px 16px; }
  .col-head .col-name, .col-head .count { display: none; }
  .col-head .add-btn { display: none; }
  .col-scroll { padding: 4px 12px calc(96px + env(safe-area-inset-bottom)); }
  .card { padding: 12px 10px 12px 12px; gap: 3px 12px; grid-template-columns: 20px 1fr auto; }
  .check { width: 19px; height: 19px; margin-top: 1px; }
  .star { opacity: 1; width: 28px; height: 24px; color: var(--border-strong); }
  .star svg { width: 16px; height: 16px; }
  .card .meta { font-size: 13px; }
  .add, .field, .p-notes, .p-title, select.field { font-size: 16px; }
  .p-title { font-size: 20px; }
  .field, .chip { height: 34px; }
  .fab {
    display: grid; place-items: center; position: fixed; right: 18px; bottom: calc(18px + env(safe-area-inset-bottom));
    width: 52px; height: 52px; border-radius: 50%; background: var(--fg); color: var(--bg); box-shadow: var(--shadow-lift); z-index: 5;
  }
  .fab svg { width: 22px; height: 22px; stroke-width: 2; }
  .panel { width: 100vw; border-left: 0; animation: rise .22s cubic-bezier(.2, .8, .2, 1); }
  @keyframes rise { from { transform: translateY(24px); opacity: 0; } }
  .props { grid-template-columns: 72px 1fr; }
}