/* =====================================================================
   1. CSS — variables and theming
   Light + dark themes; toggle persists in settings.
   ===================================================================== */

:root,
[data-theme="light"] {
  --bg:            #f7f8fa;
  --bg-elev:       #ffffff;
  --bg-elev-2:     #f1f3f5;
  --border:        #e1e4e8;
  --border-strong: #c8cdd4;
  --text:          #1f2328;
  --text-muted:    #57606a;
  --text-faint:    #8b949e;
  --accent:        #2563eb;
  --accent-hover:  #1d4ed8;
  --danger:        #dc2626;
  --success:       #059669;
  --warning:       #d97706;

  --p-h-bg:        #fee2e2;
  --p-h-fg:        #991b1b;
  --p-m-bg:        #ffedd5;
  --p-m-fg:        #9a3412;
  --p-l-bg:        #e5e7eb;
  --p-l-fg:        #374151;

  --amber-h:       #b45309;
  --amber-m:       #d97706;
  --amber-l:       #fbbf24;

  --shadow-1:      0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.04);
  --shadow-2:      0 4px 12px rgba(0,0,0,.08);
  --radius:        8px;
  --radius-sm:     6px;
  --radius-lg:     12px;
}

[data-theme="dark"] {
  --bg:            #0d1117;
  --bg-elev:       #161b22;
  --bg-elev-2:     #1c2128;
  --border:        #30363d;
  --border-strong: #444c56;
  --text:          #e6edf3;
  --text-muted:    #9da7b3;
  --text-faint:    #6e7681;
  --accent:        #4493f8;
  --accent-hover:  #2f81f7;
  --danger:        #f85149;
  --success:       #3fb950;
  --warning:       #d29922;

  --p-h-bg:        #4a1d1d;
  --p-h-fg:        #ff8a8a;
  --p-m-bg:        #4a3119;
  --p-m-fg:        #ffb27a;
  --p-l-bg:        #2d333b;
  --p-l-fg:        #adbac7;

  --amber-h:       #92400e;
  --amber-m:       #b45309;
  --amber-l:       #d97706;

  --shadow-1:      0 1px 2px rgba(0,0,0,.4);
  --shadow-2:      0 6px 16px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* Layout: three-pane grid */
.app {
  display: grid;
  grid-template-columns: 240px 1fr 320px;
  grid-template-rows: 48px 1fr;
  height: 100vh;
}
.app.calendar-collapsed { grid-template-columns: 240px 1fr 0; }
.app.calendar-collapsed .calendar-pane { display: none; }  /* v1.3.3: no sliver, no scrollbar */
.app.sidebar-collapsed  { grid-template-columns: 56px 1fr 320px; }

.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  z-index: 5;
}
.topbar .brand {
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--accent);
  font-size: 20px;
}
.topbar .brand-version {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  margin-left: 6px;
  letter-spacing: 0;
}
.topbar .spacer { flex: 1; }
.topbar button { margin-left: 4px; }
/* F7: the three banner action buttons share a subtle accent tint (A2), theme-aware via color-mix.
   In lilac/lilac-dark the [data-theme] .topbar button rule (higher specificity) keeps its own look. */
.topbar .bn-action {
  background: color-mix(in srgb, var(--accent) 14%, var(--bg-elev));
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  color: color-mix(in srgb, var(--accent) 55%, var(--text));
  font-weight: 500;
}
.topbar .bn-action:hover {
  background: color-mix(in srgb, var(--accent) 22%, var(--bg-elev));
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
}

.sidebar {
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 8px 0;
}

.main {
  overflow-y: auto;
  padding: 16px 24px;
}

.calendar-pane {
  background: var(--bg-elev);
  border-left: 1px solid var(--border);
  overflow-y: auto;
}

/* Buttons */
button, .btn {
  font: inherit;
  color: var(--text);
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  transition: background .12s, border-color .12s;
}
button:hover, .btn:hover { background: var(--border); }
button.primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
button.danger { color: var(--danger); }
button.icon { padding: 4px 8px; line-height: 1; }
button.ghost { background: transparent; border-color: transparent; }
button.ghost:hover { background: var(--bg-elev-2); }

/* Sidebar nav */
.nav-section { padding: 8px 0; }
.nav-section h4 {
  margin: 0;
  padding: 4px 16px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-faint);
  letter-spacing: .05em;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  cursor: pointer;
  border-left: 3px solid transparent;
  font-size: 13.5px;
  color: var(--text);
  user-select: none;
}
.nav-item:hover { background: var(--bg-elev-2); }
.nav-item.active {
  background: var(--bg-elev-2);
  border-left-color: var(--accent);
  font-weight: 600;
}
.nav-item .count {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-elev-2);
  padding: 1px 7px;
  border-radius: 10px;
}
.nav-item.active .count { background: var(--bg-elev); }
.list-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Main pane */
.view-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.view-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}
.view-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
select, input[type=text], input[type=date], input[type=time], input[type=number] {
  font: inherit;
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 8px;
}
input[type=text]:focus, select:focus, input[type=date]:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

/* Task tree */
.task-list { display: flex; flex-direction: column; gap: 4px; }
.task {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
  min-height: 32px;
}
.task .body { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.task .title-row { flex: 1; min-width: 200px; }
.task .meta { margin-top: 0; }
.task.subtask { margin-left: 28px; background: var(--bg-elev-2); }
.task.completed { opacity: 0.6; }
.task.completed .title { text-decoration: line-through; }
.task .tickbox { margin-top: 2px; cursor: pointer; }
.task .body { flex: 1; min-width: 0; }
.task .title-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.task .title { font-weight: 500; min-width: 0; flex: 0 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.task .title-cluster { display: flex; align-items: center; gap: 8px; flex-wrap: nowrap; min-width: 0; flex: 1 1 auto; }
.task .meta {
  display: flex;
  gap: 6px;
  margin-top: 4px;
  font-size: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.task .description {
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 13px;
  white-space: pre-wrap;
}
.task .actions { display: flex; gap: 4px; }
.task .chevron {
  cursor: pointer;
  color: var(--text-muted);
  user-select: none;
  width: 18px;
  text-align: center;
}
.task .chevron.placeholder { visibility: hidden; }

/* Pills */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 8px;
  font-size: 11.5px;
  border-radius: 10px;
  font-weight: 500;
  white-space: nowrap;
}
.pill.list-pill { background: var(--bg-elev-2); color: var(--text-muted); }
.pill.list-pill .list-dot { width: 8px; height: 8px; }
.pill.priority-H { background: var(--p-h-bg); color: var(--p-h-fg); }
.pill.priority-M { background: var(--p-m-bg); color: var(--p-m-fg); }
.pill.priority-L { background: var(--p-l-bg); color: var(--p-l-fg); }
.pill.due { background: var(--bg-elev-2); color: var(--text-muted); cursor: pointer; }
.pill.due.overdue-H { background: var(--amber-h); color: white; }
.pill.due.overdue-M { background: var(--amber-m); color: white; }
.pill.due.overdue-L { background: var(--amber-l); color: #3a2a05; }
.pill.recurring { background: var(--bg-elev-2); color: var(--accent); }
.pill.tag {
  background: var(--bg-elev-2);
  color: var(--accent);
  font-size: 11px;
  padding: 1px 8px;
  border: 1px dashed var(--accent);
}
.pill.gc {
  background: var(--bg-elev-2);
  color: var(--text-faint);
  font-size: 10px;
  padding: 0 6px;
}
.pill.gc.synced { color: var(--success); }
.pill.gc.pending { color: var(--warning); }
.pill.gc.error { color: var(--danger); }

/* Calendar pane */
.cal-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.cal-header h3 { margin: 0; font-size: 14px; }
.cal-day {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}
.cal-day h5 {
  margin: 0 0 6px 0;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--text-faint);
  letter-spacing: .04em;
}
.cal-event {
  font-size: 12.5px;
  padding: 4px 6px;
  border-radius: 4px;
  background: var(--bg-elev-2);
  margin-bottom: 4px;
  border-left: 3px solid var(--accent);
}
.cal-event .time { color: var(--text-muted); font-size: 11px; }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.modal {
  background: var(--bg-elev);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 620px;
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2);
}
.modal h2 { margin-top: 0; }
.modal label {
  display: block;
  margin: 12px 0 4px 0;
  font-weight: 500;
  font-size: 13px;
  color: var(--text-muted);
}
.modal input, .modal select, .modal textarea {
  width: 100%;
  font: inherit;
}
.modal textarea {
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  resize: vertical;
  min-height: 60px;
}
.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* Context menu */
.context-menu {
  position: absolute;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 0;
  min-width: 180px;
  box-shadow: var(--shadow-2);
  z-index: 50;
}
.context-menu button {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  border-radius: 0;
  padding: 6px 14px;
  font-size: 13px;
}
.context-menu button:hover { background: var(--bg-elev-2); }
.context-menu hr { border: none; border-top: 1px solid var(--border); margin: 4px 0; }

/* Toast / banner — fixed-position so it always floats above the .app grid */
#banner-root {
  position: fixed;
  top: 56px;
  right: 16px;
  z-index: 200;
  max-width: 480px;
  pointer-events: none;
}
#banner-root .banner {
  pointer-events: auto;
  margin-bottom: 6px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-2);
  animation: bannerSlide .18s ease-out;
}
@keyframes bannerSlide { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
.banner {
  padding: 8px 16px;
  background: var(--bg-elev-2);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.banner.error { background: var(--p-h-bg); color: var(--p-h-fg); }
.banner.warning { background: var(--p-m-bg); color: var(--p-m-fg); }
.banner.success { background: var(--p-l-bg); color: var(--success); }

/* Empty states */
.empty {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-muted);
}

/* Admin panel */
.admin-section { margin-bottom: 24px; }
.admin-section h3 { font-size: 14px; margin: 0 0 8px 0; color: var(--accent); }
.admin-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 8px 16px;
  align-items: center;
}
.admin-grid label { color: var(--text-muted); font-size: 13px; }
.admin-stats { font-family: ui-monospace, monospace; font-size: 12.5px; color: var(--text-muted); }

/* Admin tabs */
.admin-tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
  overflow-x: auto;
}
.admin-tab {
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  padding: 10px 16px;
  cursor: pointer;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  margin-bottom: -1px;
}
.admin-tab:hover { color: var(--text); background: var(--bg-elev-2); }
.admin-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

/* Floating action button */
.fab {
  position: fixed;
  bottom: 24px;
  right: 344px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-size: 26px;
  border: none;
  box-shadow: var(--shadow-2);
  cursor: pointer;
}
.fab:hover { background: var(--accent-hover); }

/* Utility */
.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }
.flex-row { display: flex; gap: 8px; align-items: center; }
.flex-col { display: flex; flex-direction: column; gap: 4px; }
.right { text-align: right; }

/* =====================================================================
   v1.3.0 — Lilac theme variants, date dividers, drag-reorder, history
   ===================================================================== */

/* Lilac (light) theme — deeper lilac topbar, pale lilac main backdrop */
[data-theme="lilac"] {
  --bg:            #f7f3fb;
  --bg-elev:       #ffffff;
  --bg-elev-2:     #efe7f6;
  --border:        #ddd0e8;
  --border-strong: #c4b3d4;
  --text:          #2a1f38;
  --text-muted:    #5b4773;
  --text-faint:    #8a7da0;
  --accent:        #7c4dbf;
  --accent-hover: #5e349a;
  --danger:        #c63b3b;
  --success:       #3f8c52;
  --warning:       #c97a1a;

  --p-h-bg:        #ffd9d9;
  --p-h-fg:        #871818;
  --p-m-bg:        #ffe6cc;
  --p-m-fg:        #8a4814;
  --p-l-bg:        #e7defa;
  --p-l-fg:        #3b2658;

  --amber-h:       #ad5b00;
  --amber-m:       #d97706;
  --amber-l:       #fbbf24;

  /* Lilac brand colours used by overrides below */
  --lilac-deep:    #b8a3d4;
  --lilac-pale:    #f3edfa;
  --lilac-deep-fg: #2a1f38;
}

/* Lilac (dark) theme */
[data-theme="lilac-dark"] {
  --bg:            #181321;
  --bg-elev:       #221a30;
  --bg-elev-2:     #2c2240;
  --border:        #3b2f53;
  --border-strong: #574071;
  --text:          #ece4f7;
  --text-muted:    #b9a8d3;
  --text-faint:    #80739a;
  --accent:        #c8a8ff;
  --accent-hover:  #b48cff;
  --danger:        #ff7d7d;
  --success:       #6fd086;
  --warning:       #ffc870;

  --p-h-bg:        #4a1e2c;
  --p-h-fg:        #ffa6a6;
  --p-m-bg:        #4a3416;
  --p-m-fg:        #ffc890;
  --p-l-bg:        #2a2240;
  --p-l-fg:        #d8c9f3;

  --amber-h:       #c47900;
  --amber-m:       #d29922;
  --amber-l:       #f5c060;

  --lilac-deep:    #6e4ea0;
  --lilac-pale:    #1d162b;
  --lilac-deep-fg: #f3edfa;
}

/* Topbar override for lilac themes — deeper-lilac strip with appropriate text colour */
[data-theme="lilac"] .topbar,
[data-theme="lilac-dark"] .topbar {
  background: var(--lilac-deep);
  border-bottom-color: var(--border-strong);
}
[data-theme="lilac"] .topbar .brand,
[data-theme="lilac-dark"] .topbar .brand {
  color: var(--lilac-deep-fg);
}
[data-theme="lilac"] .topbar .brand-version,
[data-theme="lilac-dark"] .topbar .brand-version {
  color: rgba(42,31,56,.7);
}
[data-theme="lilac-dark"] .topbar .brand-version {
  color: rgba(243,237,250,.7);
}
[data-theme="lilac"] .topbar button,
[data-theme="lilac-dark"] .topbar button {
  background: rgba(255,255,255,.18);
  color: var(--lilac-deep-fg);
  border-color: rgba(255,255,255,.3);
}
[data-theme="lilac"] .topbar button:hover,
[data-theme="lilac-dark"] .topbar button:hover {
  background: rgba(255,255,255,.32);
}

/* Main pane: pale lilac background + left accent bar.
   v1.3.2: bar weight + colour are now driven by CSS vars set from settings
   (accentBarWeight / accentBarColour). List views override --list-active per render
   to use the active list's own colour. Setting weight to 0 hides the bar entirely. */
[data-theme="lilac"] .main,
[data-theme="lilac-dark"] .main {
  background: var(--lilac-pale);
}
.main {
  border-left: var(--accent-bar-weight, 2px) solid var(--list-active, transparent);
  transition: border-left-color .15s ease, border-left-width .15s ease;
}

/* Date divider (v1.3.0) — separates date groups in multi-day views */
.date-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 0 6px 0;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-muted);
}
.date-divider .label {
  background: var(--bg-elev-2);
  padding: 3px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  white-space: nowrap;
}
.date-divider .rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}
.date-divider.overdue .label { background: var(--p-h-bg); color: var(--p-h-fg); }
.date-divider.today    .label { background: var(--accent); color: white; }
.date-divider.future   .label { background: var(--bg-elev-2); }

/* Drag-and-drop visual cues for subtask reorder */
.task[draggable="true"] { cursor: grab; }
.task.dragging { opacity: .5; }
.task.drag-over { outline: 2px dashed var(--accent); outline-offset: -2px; }

/* Task History view */
.history-section .history-heading:hover { filter: brightness(0.97); }
.history-section .chevron { width: 14px; display: inline-block; }
/* ============================================================
   v1.7.0 — Notes
   ============================================================ */
/* Note cards in the Notes views */
.note-card {
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: background 0.15s;
}
.note-card:hover { background: var(--bg-elev-2); }
.note-card-title { color: var(--text); }
.note-card-body { line-height: 1.45; }
.note-card-menu {
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
}

/* Nested sidebar sub-sections (Tasks > Task Views / Task Lists) */
.nav-section.nested {
  margin-top: 6px;
  margin-bottom: 0;
  padding-left: 8px;
  border-left: 1px solid var(--border);
}
.nav-section.nested h4 {
  margin: 4px 0 4px 0;
}

/* ============================================================
   v1.8.0 — Dependencies
   ============================================================ */
.dep-badge {
  padding: 1px 0;
  user-select: none;
}
.dep-badge span[onclick],
.dep-badge span[style*="cursor:pointer"] {
  transition: color 0.15s;
}
.dep-badge span[title]:hover {
  color: var(--text);
}

/* ============================================================
   v1.9.0 — Progress
   ============================================================ */
.progress-pill {
  user-select: none;
  cursor: default;
}
.progress-track {
  border: 1px solid var(--border);
  box-sizing: border-box;
}
.progress-fill {
  /* width set inline; transition for visual feedback on update */
}

/* ============================================================
   v2.0 — Polish
   ============================================================ */
/* + Add subtask button now carries a coloured frame (set inline per row).
   This hover rule lifts the affordance without overriding the inline border. */
.add-subtask-btn:hover {
  filter: brightness(1.1);
  transform: scale(1.05);
  transition: transform 0.1s, filter 0.1s;
}