/* =================================================================== */
/* Taskboard — Trello-style Kanban with glassmorphic columns and cards. */
/* =================================================================== */

/* Page shell — full-width so the board can scroll horizontally.
   width:100% + min-width:0 prevent the kanban's intrinsic content width
   from forcing this <main> wider than its flex-column parent. On wide
   PCs (.app-shell caps at 1280 px), this resolves to ≤1216 px just like
   before — visual layout is unchanged. On smaller viewports it stops the
   shell from claiming its full 1400 px max-width and overflowing. */
.taskboard-shell {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 6rem;  /* bottom padding clears floating dock */
}

/* Header bar (Title + actions) */
.taskboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  margin-bottom: 1rem;
}
.taskboard-header-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.taskboard-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}
.taskboard-actions {
  display: flex;
  gap: 0.5rem;
}

/* ── Board: horizontal flex of columns ─────────────────────────────── */
.tb-board {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  overflow-x: auto;
  overflow-y: visible;
  padding: 0.5rem 0.25rem 1rem;
  scroll-snap-type: x proximity;
}
.tb-board::-webkit-scrollbar { height: 10px; }
.tb-board::-webkit-scrollbar-track { background: transparent; }
.tb-board::-webkit-scrollbar-thumb {
  background: var(--border, rgba(255,255,255,0.08));
  border-radius: 8px;
}

/* ── Column: glassmorphic surface, color-coded accent ─────────────── */
.tb-column {
  flex: 0 0 290px;
  max-height: calc(100vh - 240px);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  border-radius: 14px;
  background: var(--surface, rgba(255,255,255,0.04));
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  box-shadow: var(--shadow-mid, 0 8px 24px rgba(0,0,0,0.18));
  scroll-snap-align: start;
  position: relative;
  overflow: hidden;
}
[data-theme="dark"] .tb-column,
[data-page="taskboard"][data-theme="dark"] .tb-column {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

/* Accent strip at the top of each column (uses --tb-accent inline var) */
.tb-column::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--tb-accent, var(--accent, #006FE0));
  opacity: 0.95;
}

/* Column header */
.tb-col-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.875rem 1rem 0.625rem;
  border-bottom: 1px solid var(--border, rgba(255,255,255,0.06));
}
.tb-col-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.tb-col-title .tb-col-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tb-accent, var(--accent, #006FE0));
  box-shadow: 0 0 8px var(--tb-accent, var(--accent, #006FE0));
}
.tb-col-count {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted, #86868b);
  background: var(--accent-light, rgba(255,255,255,0.06));
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
}
.tb-col-actions {
  display: flex;
  gap: 0.25rem;
}
.tb-col-action {
  background: none;
  border: none;
  color: var(--text-muted, #86868b);
  font-size: 0.95rem;
  line-height: 1;
  padding: 0.25rem 0.4rem;
  border-radius: 6px;
  cursor: pointer;
}
.tb-col-action:hover {
  color: var(--text, #1d1d1f);
  background: var(--accent-light, rgba(255,255,255,0.06));
}
.tb-col-action.danger:hover {
  color: var(--danger, #ef4444);
}

/* Column body — scrollable list of cards */
.tb-col-body {
  flex: 1;
  overflow-y: auto;
  padding: 0.625rem 0.625rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 60px;
}
.tb-col-body.is-drop-target {
  background: var(--accent-light, rgba(255,255,255,0.04));
}

/* Footer: Add card */
.tb-col-footer {
  padding: 0.5rem 0.75rem 0.75rem;
}
.tb-add-card {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px dashed var(--border, rgba(255,255,255,0.1));
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted, #86868b);
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}
.tb-add-card:hover {
  background: var(--accent-light, rgba(255,255,255,0.05));
  border-color: var(--tb-accent, var(--accent, #006FE0));
  color: var(--text, #1d1d1f);
}

/* ── Card ──────────────────────────────────────────────────────────── */
.tb-card {
  position: relative;
  background: var(--surface-elevated, rgba(255,255,255,0.06));
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-left: 3px solid var(--tb-accent, var(--accent, #006FE0));
  border-radius: 10px;
  padding: 0.5rem 0.625rem 0.5rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  cursor: grab;
  user-select: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease;
}
.tb-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.18), 0 0 0 1px var(--tb-accent, var(--accent));
}
.tb-card.is-dragging {
  opacity: 0.45;
  cursor: grabbing;
}
.tb-card.is-drop-above { box-shadow: inset 0 2px 0 0 var(--tb-accent, var(--accent)); }
.tb-card.is-drop-below { box-shadow: inset 0 -2px 0 0 var(--tb-accent, var(--accent)); }
.tb-card.is-done {
  opacity: 0.55;
}
.tb-card.is-done .tb-card-title {
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

/* Cover image (optional) */
.tb-card-cover {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 0.125rem;
  background: var(--accent-light, rgba(255,255,255,0.06));
}

/* Top row: type pill + status check */
.tb-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}
.tb-type-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 0.0625rem 0.4rem;
  border-radius: 4px;
  background: var(--accent-light, rgba(255,255,255,0.06));
  color: var(--text-muted, #86868b);
}
.tb-card-check {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1.5px solid var(--border, rgba(255,255,255,0.18));
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: transparent;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
  padding: 0;
  line-height: 1;
}
.tb-card-check:hover {
  border-color: var(--tb-accent, var(--accent));
}
.tb-card-check.is-done {
  background: #22c55e;
  border-color: #22c55e;
  color: #ffffff;
}

/* Title + (optional) description */
.tb-card-title {
  font-weight: 500;
  font-size: 0.875rem;
  margin: 0;
  line-height: 1.35;
  color: var(--text, #1d1d1f);
  word-break: break-word;
}
.tb-card-desc {
  color: var(--text-muted, #86868b);
  font-size: 0.78rem;
  margin: 0;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Meta row: subtask count + attachments + actions */
.tb-card-meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.75rem;
  color: var(--text-muted, #86868b);
}
.tb-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}
.tb-card-actions {
  margin-left: auto;
  display: inline-flex;
  gap: 0.125rem;
}
.tb-card-action {
  background: none;
  border: none;
  color: var(--text-muted, #86868b);
  font-size: 0.85rem;
  line-height: 1;
  padding: 0.125rem 0.3rem;
  border-radius: 4px;
  cursor: pointer;
}
.tb-card-action:hover {
  color: var(--text, #1d1d1f);
  background: var(--accent-light, rgba(255,255,255,0.06));
}
.tb-card-action.danger:hover { color: var(--danger, #ef4444); }

/* ── Empty state on Issues column when nothing exists ────────────── */
.tb-empty-row {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted, #86868b);
  padding: 1.25rem 0.5rem;
}

/* ── Bottom dock ──────────────────────────────────────────────────── */
.tb-bottom-dock {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem;
  border-radius: 999px;
  z-index: 30;
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
}
.tb-dock-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.875rem;
  border-radius: 999px;
  background: transparent;
  border: none;
  color: var(--text-muted, #86868b);
  cursor: pointer;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.12s, color 0.12s;
}
.tb-dock-btn:hover {
  background: var(--accent-light, rgba(255,255,255,0.06));
  color: var(--text, #1d1d1f);
}
.tb-dock-btn.is-active {
  background: var(--accent, #006FE0);
  color: #ffffff;
}
.tb-dock-icon { font-size: 0.95rem; line-height: 1; }
@media (max-width: 560px) {
  .tb-dock-label { display: none; }
}

/* ── Modal ────────────────────────────────────────────────────────── */
.tb-modal {
  border: none;
  border-radius: 16px;
  padding: 0;
  max-width: 520px;
  width: 92vw;
  background: transparent;
  box-shadow: none;
}
.tb-modal::backdrop {
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px);
}
.tb-modal .modal-card {
  padding: 1.25rem;
}
.tb-modal .modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.tb-modal .modal-header h2 {
  margin: 0;
  font-size: 1.125rem;
}
.tb-modal .icon-btn {
  background: none;
  border: none;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--text-muted, #86868b);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
}
.tb-modal .icon-btn:hover {
  color: var(--text, #1d1d1f);
  background: var(--accent-light, rgba(255,255,255,0.06));
}
.tb-modal .modal-body {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  margin-bottom: 1.25rem;
}
.tb-modal .field-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text, #1d1d1f);
}
.tb-modal .text-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border-radius: 10px;
  border: 1px solid var(--border, rgba(0,0,0,0.08));
  background: var(--surface-elevated, rgba(255,255,255,0.92));
  color: var(--text, #1d1d1f);
  font-size: 0.9375rem;
  outline: none;
  font-family: inherit;
}
.tb-modal .text-input:focus {
  border-color: var(--accent, #006FE0);
  box-shadow: 0 0 0 3px var(--accent-glow, rgba(0,111,224,0.25));
}
.tb-modal .modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}
.tb-modal-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.5rem;
}
.tb-modal-col {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

/* Color swatches */
.tb-color-swatches {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.tb-color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  outline: none;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.06);
  transition: transform 0.1s, border-color 0.1s;
}
.tb-color-swatch:hover { transform: scale(1.08); }
.tb-color-swatch.is-selected {
  border-color: var(--text, #1d1d1f);
}

/* =================================================================== */
/* Responsive: tablet + mobile.                                        */
/* Desktop (>1023 px) is left unchanged. Below that we follow Trello's */
/* mobile pattern — bigger touch targets, near-full-width columns with */
/* horizontal swipe-snap, stacked header, dvh-aware column heights.    */
/* =================================================================== */

/* ── Tablet (≤1024 px — covers iPad landscape exactly) ─────────────── */
@media (max-width: 1024px) {
  .taskboard-shell {
    /* Without width:100% the <main>'s `max-width: 1400px` becomes its
       intrinsic width on flex-column parents, blowing the layout past the
       viewport. min-width:0 lets the flex column compress on narrow screens. */
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    padding: 1.25rem 1rem 6.5rem;
  }
  .taskboard-header {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }
  .tb-board {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }
  .taskboard-header {
    padding: 0.875rem 1.125rem;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .taskboard-header-text {
    flex: 1 1 auto;
    min-width: 0;
  }
  .taskboard-actions {
    flex-wrap: wrap;
  }

  /* Columns: slightly wider so reading area is comfortable on iPad. */
  .tb-column {
    flex: 0 0 320px;
    /* dvh first so iOS Safari address-bar shrink doesn't crop content */
    max-height: calc(100dvh - 220px);
    /* fallback for browsers that don't support dvh */
    max-height: calc(100vh - 220px);
  }
  .tb-board {
    -webkit-overflow-scrolling: touch;
  }
  .tb-col-body {
    -webkit-overflow-scrolling: touch;
  }

  /* Touch-friendly hit areas without changing visual size. */
  .tb-card-action,
  .tb-col-action {
    min-width: 36px;
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .tb-color-swatch {
    width: 36px;
    height: 36px;
  }
}

/* ── Phone + small tablet portrait (≤720 px) ─────────────────────── */
@media (max-width: 720px) {
  .taskboard-shell {
    padding: 1rem 0.75rem 6.5rem;
  }
  .taskboard-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.625rem;
    padding: 1rem 1rem 0.875rem;
  }
  .taskboard-title {
    font-size: 1.375rem;
  }
  .taskboard-actions {
    width: 100%;
    gap: 0.5rem;
  }
  .taskboard-actions .btn {
    flex: 1 1 0;
    /* WCAG-style 44 px hit target on touch */
    min-height: 44px;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    white-space: nowrap;
  }

  /* Trello-style mobile board — each column ≈ 88 vw, swipe to navigate.
     scroll-snap-type already set on .tb-board (line 44); we just tighten
     the column flex-basis and keep snap-align: start. */
  .tb-board {
    gap: 0.75rem;
    padding: 0.5rem 1rem 1rem;
    scroll-padding-left: 1rem;
  }
  .tb-column {
    flex: 0 0 min(88vw, 340px);
    max-height: calc(100dvh - 200px);
    max-height: calc(100vh - 200px);
  }

  /* Slightly bigger card text + tap-friendly checkbox */
  .tb-card {
    padding: 0.625rem 0.75rem 0.625rem 0.875rem;
    gap: 0.5rem;
  }
  .tb-card-title { font-size: 0.9375rem; line-height: 1.4; }
  .tb-card-desc  { font-size: 0.8125rem; line-height: 1.4; }
  .tb-card-check {
    width: 22px;
    height: 22px;
    font-size: 0.875rem;
  }

  /* Long unbreakable strings (URLs, formulas) shouldn't blow the column */
  .tb-card-title,
  .tb-card-desc {
    overflow-wrap: anywhere;
  }

  /* The horizontal scrollbar is unhelpful on touch — momentum scroll only */
  .tb-board::-webkit-scrollbar { height: 0; }

  /* Make the "+ Add a card" CTA tap-friendly */
  .tb-add-card {
    min-height: 44px;
    padding: 0.6875rem 0.875rem;
    font-size: 0.875rem;
  }

  /* Modal: stack the 3-up sub-task / attachments row to single column */
  .tb-modal-row {
    grid-template-columns: 1fr;
  }
  .tb-modal {
    max-width: none;
    width: calc(100vw - 16px);
  }
  .tb-modal .modal-card {
    padding: 1rem;
  }

  /* Bottom dock: full-width tab bar, anchored to safe area */
  .tb-bottom-dock {
    left: 0.5rem;
    right: 0.5rem;
    bottom: max(0.5rem, env(safe-area-inset-bottom, 0.5rem));
    transform: none;
    width: calc(100% - 1rem);
    justify-content: space-around;
    padding: 0.375rem 0.5rem;
  }
  .tb-dock-btn {
    flex: 1 1 0;
    justify-content: center;
    min-height: 44px;
    padding: 0.5rem 0.5rem;
  }
}

/* ── Small phone (≤420 px) — keep dock icon-only and shrink swatches ─ */
@media (max-width: 420px) {
  .tb-column {
    flex: 0 0 min(90vw, 320px);
  }
  .tb-color-swatches {
    gap: 0.625rem;
  }
}