/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #1a1b26;
  --surface: #24283b;
  --surface-hover: #2a2e42;
  --border: #3b4261;
  --text: #c0caf5;
  --text-dim: #565f89;
  --text-bright: #e0e6ff;
  --accent: #7aa2f7;
  --danger: #f7768e;
  --warning: #e0af68;
  --radius: 8px;
  --card-radius: 6px;
}

html, body {
  height: 100%;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* ── Password Overlay ── */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.overlay.hidden { display: none; }

.overlay-content {
  text-align: center;
  max-width: 320px;
  width: 100%;
  padding: 0 20px;
}

.overlay-content h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 8px;
}

.overlay-content p {
  color: var(--text-dim);
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.overlay-content form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.overlay-content input {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.overlay-content input:focus {
  border-color: var(--accent);
}

.overlay-content button {
  padding: 12px;
  border-radius: var(--radius);
  border: none;
  background: var(--accent);
  color: #1a1b26;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.2s;
}

.overlay-content button:hover { opacity: 0.85; }

.error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 8px;
}

.error.hidden { display: none; }

/* ── Header ── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-bright);
}

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

.header-actions button {
  padding: 6px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.header-actions button:hover {
  background: var(--surface-hover);
  color: var(--text);
}

/* ── Board ── */
#board {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
  overflow-x: auto;
  overflow-y: hidden;
  height: calc(100vh - 65px);
  scroll-snap-type: x proximity;
}

#board::-webkit-scrollbar { height: 8px; }
#board::-webkit-scrollbar-track { background: transparent; }
#board::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

/* ── Column ── */
.column {
  min-width: 300px;
  max-width: 300px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  scroll-snap-align: start;
}

.column-header {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0 4px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.column-header .count {
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 10px;
}

.column-cards {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 4px 2px 20px;
  min-height: 40px;
}

.column-cards::-webkit-scrollbar { width: 4px; }
.column-cards::-webkit-scrollbar-track { background: transparent; }
.column-cards::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* ── Card ── */
.card {
  background: var(--surface);
  border-radius: var(--card-radius);
  border-left: 3px solid var(--accent);
  padding: 12px 14px;
  cursor: pointer;
  transition: background 0.15s;
  user-select: none;
  position: relative;
}

.card:hover { background: var(--surface-hover); }

.card-summary {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.card-top-row {
  display: flex;
  align-items: center;
  gap: 0;
}

.card-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-bright);
  flex: 1;
  min-width: 0;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
  flex-shrink: 0;
}

.card-link-btn {
  font-size: 0.7rem;
  opacity: 0;
  cursor: pointer;
  transition: opacity 0.15s;
  padding: 2px;
  line-height: 1;
}

.card:hover .card-link-btn {
  opacity: 0.5;
}

.card-link-btn:hover {
  opacity: 1 !important;
}

.card-delete-btn {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dim);
  opacity: 0;
  cursor: pointer;
  transition: opacity 0.15s, color 0.15s;
  padding: 0 4px;
  line-height: 1;
}

.card:hover .card-delete-btn {
  opacity: 0.5;
}

.card-delete-btn:hover {
  opacity: 1 !important;
  color: var(--danger) !important;
}

/* ── Delete Confirmation ── */
.card-delete-confirm {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0 4px;
  font-size: 0.78rem;
  color: var(--danger);
}

.card-delete-confirm.hidden { display: none; }

.card-delete-confirm button {
  padding: 2px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.72rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
}

.card-delete-confirm .confirm-yes {
  border-color: var(--danger);
  color: var(--danger);
}

.card-delete-confirm .confirm-yes:hover {
  background: rgba(247, 118, 142, 0.15);
}

.card-delete-confirm .confirm-no:hover {
  background: var(--surface-hover);
}

/* ── Date Pills ── */
.card-date-row {
  padding: 2px 0 0;
}

.date-pill {
  font-size: 0.65rem;
  font-weight: 500;
  padding: 1px 7px;
  border-radius: 8px;
  display: inline-block;
  line-height: 1.5;
}

.date-overdue {
  background: rgba(247, 118, 142, 0.2);
  color: var(--danger);
}

.date-soon {
  background: rgba(224, 175, 104, 0.2);
  color: var(--warning);
}

.date-later {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-dim);
}

.date-age {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-dim);
}

.date-stale {
  background: rgba(224, 175, 104, 0.2);
  color: var(--warning);
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.card-next {
  font-size: 0.78rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.card-remaining {
  font-size: 0.7rem;
  color: var(--text-dim);
  background: rgba(255,255,255,0.05);
  padding: 2px 7px;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

.card-remaining.all-done {
  background: rgba(158, 206, 106, 0.15);
  color: #9ece6a;
}

/* ── Card Expanded Tasks ── */
.card-tasks {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.2s ease, margin-top 0.2s ease;
  margin-top: 0;
}

.card.expanded .card-tasks {
  max-height: 800px;
  opacity: 1;
  margin-top: 10px;
}

.card-tasks-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 8px;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 4px;
  border-radius: 4px;
  font-size: 0.82rem;
  cursor: default;
  transition: background 0.15s;
}

.task-item:hover {
  background: rgba(255,255,255,0.03);
}

.task-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--border);
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: background 0.15s, border-color 0.15s;
}

.task-item input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.task-item input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid #1a1b26;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.task-text { color: var(--text); }

.task-item.done .task-text {
  text-decoration: line-through;
  color: var(--text-dim);
}

/* ── Add Task ── */
.add-task-row {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.add-task-input {
  flex: 1;
  padding: 6px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.78rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.add-task-input:focus {
  border-color: var(--accent);
}

.add-task-input::placeholder {
  color: var(--text-dim);
}

.add-task-btn {
  padding: 6px 12px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.75rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.add-task-btn:hover {
  background: var(--accent);
  color: #1a1b26;
  border-color: var(--accent);
}

/* ── Drag Ghosts ── */
.sortable-ghost {
  opacity: 0.4;
}

.sortable-chosen {
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.sortable-drag {
  opacity: 0.9;
}

.task-item.sortable-ghost {
  opacity: 0.3;
}

/* ── Drag Handle ── */
.task-handle {
  cursor: grab;
  color: var(--text-dim);
  font-size: 0.7rem;
  opacity: 0;
  transition: opacity 0.15s;
  flex-shrink: 0;
  line-height: 1;
}

.task-item:hover .task-handle {
  opacity: 1;
}

.card-drag-handle {
  cursor: grab;
  color: var(--text-dim);
  font-size: 0.75rem;
  opacity: 0;
  transition: opacity 0.15s;
  margin-right: 6px;
  line-height: 1;
  flex-shrink: 0;
}

.card:hover .card-drag-handle {
  opacity: 0.6;
}

.card-drag-handle:hover {
  opacity: 1 !important;
}

/* ── Mobile ── */
@media (max-width: 768px) {
  header { padding: 12px 16px; }

  #board {
    padding: 12px 16px;
    gap: 12px;
    height: calc(100vh - 57px);
  }

  .column {
    min-width: 260px;
    max-width: 260px;
  }

  .card { padding: 10px 12px; }

  .card-delete-btn,
  .card-link-btn {
    opacity: 0.5;
  }
}

@media (max-width: 480px) {
  .column {
    min-width: 85vw;
    max-width: 85vw;
  }

  #board { scroll-snap-type: x mandatory; }
}