/* ============================================================
   styles.css  –  Social Bookmarking Application
   Theme switching: set data-theme="light|dark|forest" on <html>
   ============================================================ */

/* ── Theme: light (default) ─────────────────────────────────── */
:root,
:root[data-theme="light"] {
  --bg-app:        #E8EBF0;
  --bg-canvas:     #F0F2F5;
  --bg-toolbar:    #FFFFFF;
  --bg-tray:       #FFFFFF;
  --bg-card:       #FFFFFF;
  --bg-container:  #FFFFFF;
  --bg-modal:      #FFFFFF;
  --bg-input:      #F7F8FA;
  --bg-overlay:    rgba(0,0,0,0.45);

  --text-primary:   #1A1D23;
  --text-secondary: #6B7280;
  --text-muted:     #a6aab3;
  --text-on-accent: #FFFFFF;

  --border:         #E5E7EB;
  --border-focus:   #4F8EF7;
  --shadow-card:    0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-modal:   0 20px 60px rgba(0,0,0,0.18);

  --accent:         #4F8EF7;
  --accent-hover:   #3B7DE8;
  --danger:         #EF4444;
  --danger-hover:   #DC2626;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ── Theme: dark ─────────────────────────────────────────────── */
:root[data-theme="dark"] {
  --bg-app:        #0F0F1A;
  --bg-canvas:     #1A1A2E;
  --bg-toolbar:    #12122A;
  --bg-tray:       #16213E;
  --bg-card:       #16213E;
  --bg-container:  #16213E;
  --bg-modal:      #1E2A45;
  --bg-input:      #0F1929;
  --bg-overlay:    rgba(0,0,0,0.65);

  --text-primary:   #E8EDF5;
  --text-secondary: #8FA3BF;
  --text-muted:     #a3b6d3;
  --text-on-accent: #FFFFFF;

  --border:         #243352;
  --border-focus:   #5B9CF6;
  --shadow-card:    0 2px 8px rgba(0,0,0,0.4);
  --shadow-modal:   0 20px 60px rgba(0,0,0,0.5);

  --accent:         #5B9CF6;
  --accent-hover:   #4A8AE8;
  --danger:         #F87171;
  --danger-hover:   #EF4444;
}

/* ── Theme: forest ───────────────────────────────────────────── */
:root[data-theme="forest"] {
  --bg-app:        #1C3015;
  --bg-canvas:     #2D4A22;
  --bg-toolbar:    #243D1A;
  --bg-tray:       #3A5C2E;
  --bg-card:       #3A5C2E;
  --bg-container:  #3A5C2E;
  --bg-modal:      #3E6030;
  --bg-input:      #2D4A22;
  --bg-overlay:    rgba(0,0,0,0.55);

  --text-primary:   #E8F5E0;
  --text-secondary: #A8C898;
  --text-muted:     #6A9058;
  --text-on-accent: #FFFFFF;

  --border:         #4A6E38;
  --border-focus:   #7EC850;
  --shadow-card:    0 2px 8px rgba(0,0,0,0.35);
  --shadow-modal:   0 20px 60px rgba(0,0,0,0.45);

  --accent:         #7EC850;
  --accent-hover:   #6AB840;
  --danger:         #F87171;
  --danger-hover:   #EF4444;
}

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

html, body {
  height: 100%;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-app);
}

button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: var(--font);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--border-focus);
}

/* ── Auth Screen ─────────────────────────────────────────────── */
#auth-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.auth-card {
  background: var(--bg-modal);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 400px;
  padding: 32px;
}

.auth-card h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.auth-card p.subtitle {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 13px;
}

.auth-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border);
}

.auth-tab {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
}

.auth-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.auth-form { display: none; }
.auth-form.active { display: block; }

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.auth-error {
  color: var(--danger);
  font-size: 13px;
  margin-bottom: 12px;
  min-height: 18px;
}

/* ── Button Styles ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background 0.15s, opacity 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-on-accent);
  width: 100%;
  justify-content: center;
  padding: 10px;
  font-size: 14px;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}

.btn-danger:hover { background: var(--danger); color: #fff; }

.btn-icon {
  padding: 5px 7px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1;
}

.btn-icon:hover { background: var(--bg-input); color: var(--text-primary); }

/* ── Board View ──────────────────────────────────────────────── */
#board-view {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ── Toolbar ─────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.toolbar-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin-right: 8px;
}

.toolbar-spacer { flex: 1; }

.toolbar-welcome {
  font-size: 13px;
  color: var(--text-secondary);
}

.theme-select {
  width: auto;
  padding: 5px 8px;
  font-size: 13px;
}

/* ── Scrollable main area ────────────────────────────────────── */
.board-body {
  flex: 1;
  overflow: auto;
  padding: 16px;
  box-sizing: border-box;
  min-height: 0;
}

/* ── Unassigned Tray ─────────────────────────────────────────── */
.tray {
  background: var(--bg-tray);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}

.tray-header {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
}

.tray-count {
  background: var(--bg-input);
  border-radius: 10px;
  padding: 1px 7px;
  font-size: 11px;
}

.tray-body {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px 12px;
  min-height: 56px;
}

.tray-body.drag-over {
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-tray));
  outline: 2px dashed var(--accent);
  outline-offset: -4px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.tray-empty {
  color: var(--text-muted);
  font-size: 13px;
  align-self: center;
  font-style: italic;
}

/* ── Canvas ──────────────────────────────────────────────────── */
#canvas {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 14px;
  height: 100%;
  /* overflow: visible (default) — tall topics and wide column sets both
     propagate to board-body, which handles all scrolling via overflow: auto */
}

/* ── Topic Container ─────────────────────────────────────────── */
.topic-container {
  background: var(--bg-container);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: 320px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.15s;
}

.topic-container.drag-source {
  opacity: 0.4;
}

.topic-container.drop-before {
  box-shadow: -4px 0 0 0 var(--accent), var(--shadow-card);
}

.topic-container.drop-after {
  box-shadow: 4px 0 0 0 var(--accent), var(--shadow-card);
}

.topic-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  height: 40px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border-bottom: 3px solid var(--topic-accent, #4F8EF7);
  cursor: grab;
  user-select: none;
}

.topic-header:active { cursor: grabbing; }

.grip {
  color: var(--text-muted);
  font-size: 16px;
  flex-shrink: 0;
}

.topic-name {
  flex: 1;
  font-size: 14px;
  font-weight: 800;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topic-meta {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.topic-actions {
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.15s;
}

.topic-header:hover .topic-actions,
.topic-container:focus-within .topic-actions {
  opacity: 1;
}

.topic-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  min-height: 60px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.topic-body.body-collapsed {
  display: none;
}

.unassigned-container {
  cursor: default;
}

.unassigned-container .topic-header {
  cursor: default;
}

.topic-body.drag-over {
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-container));
  outline: 2px dashed var(--accent);
  outline-offset: -4px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* ── Bookmark Card ───────────────────────────────────────────── */
.bookmark-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 300px;
  height: 30px;
  padding: 0 10px;
  box-shadow: var(--shadow-card);
  cursor: pointer;
  position: relative;
  transition: box-shadow 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.bookmark-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.bookmark-card.dragging {
  opacity: 0.4;
}

.bookmark-favicon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 3px;
  object-fit: contain;
}

.card-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-primary);
}

.card-edit-btn {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-secondary);
  opacity: 0;
  transition: opacity 0.15s, background 0.15s;
  background: var(--bg-input);
}

.bookmark-card:hover .card-edit-btn { opacity: 1; }
.card-edit-btn:hover { background: var(--accent); color: #fff; }

/* Drop position indicators for bookmark reordering */
.bookmark-card.drop-before-bm { box-shadow: 0 -3px 0 0 var(--accent), var(--shadow-card); }
.bookmark-card.drop-after-bm  { box-shadow: 0  3px 0 0 var(--accent), var(--shadow-card); }

/* Dead / unreachable bookmark */
.bookmark-card.dead {
  opacity: 0.42;
}
.bookmark-card.dead .card-title {
  font-style: italic;
  color: var(--text-muted);
}
.bookmark-card.dead .bookmark-favicon {
  filter: grayscale(1);
  opacity: 0.6;
}

/* Toolbar toggle: active state (e.g. Hide dead pressed) */
.btn.active {
  background: color-mix(in srgb, var(--accent) 15%, var(--bg-input));
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Modals ──────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg-modal);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 48px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 600;
}

.modal-close {
  font-size: 20px;
  color: var(--text-secondary);
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.modal-close:hover { background: var(--bg-input); color: var(--text-primary); }

.modal-body {
  padding: 16px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-footer {
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  flex-shrink: 0;
}

.modal-url-display {
  font-size: 12px;
  color: var(--text-secondary);
  word-break: break-all;
  background: var(--bg-input);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.modal-meta {
  font-size: 12px;
  color: var(--text-muted);
}

.modal-meta span {
  background: var(--bg-input);
  border-radius: 10px;
  padding: 2px 8px;
}

textarea {
  resize: vertical;
  min-height: 80px;
}

select option { background: var(--bg-input); color: var(--text-primary); }

.modal-description {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  border-left: 3px solid var(--border);
  padding: 4px 10px;
  font-style: italic;
}

/* ── Tags input ──────────────────────────────────────────────── */
.tags-input-wrapper {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.15s;
}

.tags-input-wrapper:focus-within { border-color: var(--border-focus); }

.tags-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: color-mix(in srgb, var(--accent) 15%, var(--bg-input));
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: 12px;
  padding: 2px 8px 2px 10px;
  font-size: 12px;
  font-weight: 500;
}

.tag-remove {
  font-size: 14px;
  line-height: 1;
  color: var(--accent);
  opacity: 0.6;
  padding: 0 1px;
  border-radius: 50%;
}

.tag-remove:hover { opacity: 1; background: color-mix(in srgb, var(--accent) 20%, transparent); }

.tags-input-row {
  position: relative;
}

.tags-input-row input {
  background: transparent;
  border: none;
  padding: 2px 4px;
  font-size: 13px;
  width: 100%;
}

.tags-input-row input:focus { border: none; }

.tags-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--bg-modal);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-modal);
  z-index: 200;
  max-height: 180px;
  overflow-y: auto;
}

.tags-suggestion {
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background 0.1s;
}

.tags-suggestion:hover { background: color-mix(in srgb, var(--accent) 10%, var(--bg-modal)); }

/* ── Public toggle ───────────────────────────────────────────── */
.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  color: var(--text-primary);
}

.toggle-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-switch {
  display: inline-block;
  position: relative;
  vertical-align: middle;
  width: 38px;
  height: 20px;
  padding: 0px 20px;
  background: var(--border);
  border-radius: 11px;
  flex-shrink: 0;
  transition: background 0.2s;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
}

.toggle-input:checked + .toggle-switch { background: var(--accent); }
.toggle-input:checked + .toggle-switch::after { transform: translateX(16px); }

/* ── Public badge on card ────────────────────────────────────── */
.favicon-wrap {
  position: relative;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.public-dot {
  position: absolute;
  bottom: -2px;
  right: -3px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  border: 1px solid var(--bg-card);
}

/* ── Import Modal ────────────────────────────────────────────── */
.imp-drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 28px 20px 20px;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
  cursor: default;
}

.imp-drop-zone.drag-active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-modal));
}

.imp-drop-icon {
  font-size: 32px;
  line-height: 1;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.imp-drop-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.imp-drop-or {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.imp-file-label {
  cursor: pointer;
  width: auto;
  display: inline-flex;
}

.imp-file-label input[type="file"] {
  display: none;
}

.imp-drop-hint {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 10px;
}

.imp-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.imp-stat-cell {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 10px;
  text-align: center;
}

.imp-stat-num {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.imp-stat-accent .imp-stat-num { color: var(--accent); }
.imp-stat-muted  .imp-stat-num { color: var(--text-muted); }

.imp-stat-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 3px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.imp-hint {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.imp-progress-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.imp-progress-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.imp-progress-track {
  flex: 1;
  height: 8px;
  background: var(--bg-input);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.imp-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.12s linear;
}

.imp-progress-pct {
  font-size: 12px;
  color: var(--text-secondary);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.imp-progress-url {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: 16px;
  margin-bottom: 12px;
}

.imp-mini-stats {
  display: flex;
  gap: 16px;
  font-size: 12px;
}

.imp-mini-success { color: #34C759; }
.imp-mini-skip    { color: var(--text-muted); }
.imp-mini-err     { color: var(--danger); }

.imp-result-check {
  font-size: 40px;
  text-align: center;
  color: #34C759;
  line-height: 1;
  margin-bottom: 6px;
}

.imp-result-title {
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.imp-result-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.imp-result-row {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--text-secondary);
}

.imp-r-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.imp-r-success { background: #34C759; }
.imp-r-muted   { background: var(--text-muted); }
.imp-r-danger  { background: var(--danger); }

/* ── Utility ─────────────────────────────────────────────────── */
.hidden { display: none !important; }

.error-msg {
  color: var(--danger);
  font-size: 12px;
  margin-top: 4px;
}
