* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.5;
}

/* ── Top bar ─────────────────────────────────────────────── */

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.topbar h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.new-task {
  display: flex;
  gap: 8px;
  flex: 1 1 320px;
  max-width: 560px;
}

.new-task input {
  flex: 1;
  min-width: 0;
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font: inherit;
}

.new-task input:focus-visible,
.card:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

button {
  padding: 9px 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}

button:hover { background: var(--color-primary-hover); }

.error {
  margin: 12px 24px 0;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--color-error-bg);
  color: var(--color-error);
  font-size: 14px;
}

/* ── Board ───────────────────────────────────────────────── */

.board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 24px;
  align-items: start;
}

.lane {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
  min-height: 180px;
  transition: background 120ms, border-color 120ms;
}

/* Highlights the lane the card would land in. */
.lane.dragover {
  border-color: var(--color-accent);
  background: var(--color-accent-20);
}

.lane h2 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.count {
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--color-muted-20);
  font-size: 12px;
  letter-spacing: 0;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  min-height: 60px;
}

/* ── Cards ───────────────────────────────────────────────── */

.card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  cursor: grab;
  /* Lets a vertical drag start on touch without the page scrolling away. */
  touch-action: none;
}

.card:hover { background: var(--color-hover); }
.card.dragging { opacity: 0.4; cursor: grabbing; }

/* Marks the slot the card will drop into. */
.card.drop-before { box-shadow: 0 -3px 0 -1px var(--color-accent); }
.card.drop-after  { box-shadow: 0 3px 0 -1px var(--color-accent); }

.lane[data-lane="running"] .card { border-left-color: var(--color-secondary); }
.lane[data-lane="done"] .card    { border-left-color: var(--color-accent); }
.lane[data-lane="done"] .title   { color: var(--color-text-muted); }

.title {
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
}

.delete {
  flex: none;
  padding: 0 4px;
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1.2;
  cursor: pointer;
  opacity: 0;
  transition: opacity 120ms, color 120ms;
}

.card:hover .delete,
.delete:focus-visible { opacity: 1; }

.delete:hover { background: none; color: var(--color-error); }

.empty {
  padding: 14px 4px;
  color: var(--color-text-muted);
  font-size: 13px;
}

/* Touch drag: the card follows the finger. */
.card.touch-drag {
  position: fixed;
  z-index: 10;
  pointer-events: none;
  opacity: 0.9;
  box-shadow: 0 8px 24px var(--color-overlay);
}

@media (max-width: 720px) {
  .board { grid-template-columns: 1fr; }
  .delete { opacity: 1; }
}