/* Kanban Board - Sophisticated Dark Aesthetic
 * Typography: DM Sans + JetBrains Mono
 * Color Palette: Deep navy base with warm amber accents
 */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================
   CSS Variables - Kanban Theme
   ============================================ */

/* Light mode (default) */
:root {
  /* Base colors */
  --kb-bg-deep: #f8fafc;
  --kb-bg-surface: #ffffff;
  --kb-bg-elevated: #f1f5f9;
  --kb-bg-hover: #e2e8f0;

  /* Text colors */
  --kb-text-primary: #1e293b;
  --kb-text-secondary: #64748b;
  --kb-text-muted: #94a3b8;

  /* Accent colors */
  --kb-accent-amber: #d97706;
  --kb-accent-amber-soft: rgba(217, 119, 6, 0.12);
  --kb-accent-violet: #7c3aed;
  --kb-accent-violet-soft: rgba(124, 58, 237, 0.12);

  /* Priority colors */
  --kb-priority-urgent: #dc2626;
  --kb-priority-urgent-bg: rgba(220, 38, 38, 0.1);
  --kb-priority-high: #ea580c;
  --kb-priority-high-bg: rgba(234, 88, 12, 0.1);
  --kb-priority-medium: #2563eb;
  --kb-priority-medium-bg: rgba(37, 99, 235, 0.1);
  --kb-priority-low: #16a34a;
  --kb-priority-low-bg: rgba(22, 163, 74, 0.1);

  /* Borders & shadows */
  --kb-border: rgba(0, 0, 0, 0.08);
  --kb-border-strong: rgba(0, 0, 0, 0.15);
  --kb-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --kb-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --kb-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --kb-shadow-glow: 0 0 20px rgba(217, 119, 6, 0.1);

  /* Typography */
  --kb-font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --kb-font-mono: 'JetBrains Mono', monospace;

  /* Transitions */
  --kb-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --kb-transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --kb-transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode */
[data-theme="dark"] {
  /* Base colors */
  --kb-bg-deep: #0f0f14;
  --kb-bg-surface: #16161d;
  --kb-bg-elevated: #1e1e27;
  --kb-bg-hover: #252530;

  /* Text colors */
  --kb-text-primary: #f4f4f5;
  --kb-text-secondary: #a1a1aa;
  --kb-text-muted: #71717a;

  /* Accent colors */
  --kb-accent-amber: #f59e0b;
  --kb-accent-amber-soft: rgba(245, 158, 11, 0.15);
  --kb-accent-violet: #8b5cf6;
  --kb-accent-violet-soft: rgba(139, 92, 246, 0.15);

  /* Priority colors */
  --kb-priority-urgent: #ef4444;
  --kb-priority-urgent-bg: rgba(239, 68, 68, 0.12);
  --kb-priority-high: #f97316;
  --kb-priority-high-bg: rgba(249, 115, 22, 0.12);
  --kb-priority-medium: #3b82f6;
  --kb-priority-medium-bg: rgba(59, 130, 246, 0.12);
  --kb-priority-low: #22c55e;
  --kb-priority-low-bg: rgba(34, 197, 94, 0.12);

  /* Borders & shadows */
  --kb-border: rgba(255, 255, 255, 0.06);
  --kb-border-strong: rgba(255, 255, 255, 0.12);
  --kb-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --kb-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --kb-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --kb-shadow-glow: 0 0 20px rgba(245, 158, 11, 0.15);
}

/* ============================================
   Board Page Layout
   ============================================ */
.board-page {
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--kb-bg-deep);
  font-family: var(--kb-font-sans);
}

.board-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--kb-text-muted);
  font-size: 15px;
  letter-spacing: 0.02em;
  background: var(--kb-bg-deep);
}

.board-loading::before {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--kb-border-strong);
  border-top-color: var(--kb-accent-amber);
  border-radius: 50%;
  margin-right: 12px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   Board Header
   ============================================ */
.board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--kb-bg-surface);
  border-bottom: 1px solid var(--kb-border);
  flex-shrink: 0;
}

.board-header-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.board-title-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--kb-border);
  color: var(--kb-text-secondary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.back-btn:hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-border-strong);
  color: var(--kb-text-primary);
}

.back-btn svg {
  width: 14px;
  height: 14px;
}

.board-header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  color: var(--kb-text-primary);
  letter-spacing: -0.02em;
}

.board-description {
  margin: 0;
  color: var(--kb-text-muted);
  font-size: 13px;
  font-weight: 400;
}

.board-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Online Users */
.online-users {
  display: flex;
  margin-right: 8px;
}

.online-user {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  border: 2px solid var(--kb-bg-surface);
  margin-left: -8px;
  position: relative;
  transition: transform var(--kb-transition-fast);
}

.online-user:first-child {
  margin-left: 0;
}

.online-user:hover {
  transform: translateY(-2px);
  z-index: 1;
}

.online-user::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  background: #22c55e;
  border-radius: 50%;
  border: 2px solid var(--kb-bg-surface);
}

/* Header Buttons */
.members-btn,
.share-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.members-btn {
  background: transparent;
  border: 1px solid var(--kb-border);
  color: var(--kb-text-secondary);
}

.members-btn:hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-border-strong);
  color: var(--kb-text-primary);
}

.share-btn {
  background: linear-gradient(135deg, var(--kb-accent-amber) 0%, #d97706 100%);
  border: none;
  color: #000;
  font-weight: 600;
}

.share-btn:hover {
  box-shadow: var(--kb-shadow-glow);
  transform: translateY(-1px);
}

.members-btn svg,
.share-btn svg {
  width: 14px;
  height: 14px;
}

/* ============================================
   Priority Filter Bar
   ============================================ */
.priority-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--kb-bg-surface);
  border-bottom: 1px solid var(--kb-border);
  flex-shrink: 0;
}

.priority-filters {
  display: flex;
  gap: 6px;
}

.priority-filter-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 20px;
  border: 1px solid var(--kb-border);
  background: transparent;
  color: var(--kb-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.priority-filter-btn:hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-border-strong);
}

.priority-filter-btn.active {
  background: var(--kb-accent-amber-soft);
  border-color: var(--kb-accent-amber);
  color: var(--kb-accent-amber);
}

.priority-filter-btn .priority-icon {
  font-size: 12px;
}

.priority-filter-btn .filter-label {
  font-weight: 500;
}

.priority-filter-btn .filter-count {
  font-family: var(--kb-font-mono);
  font-size: 11px;
  padding: 2px 6px;
  background: var(--kb-bg-elevated);
  border-radius: 10px;
  color: var(--kb-text-muted);
}

.priority-filter-btn.active .filter-count {
  background: rgba(245, 158, 11, 0.2);
  color: var(--kb-accent-amber);
}

/* Priority-specific colors */
.priority-filter-btn.priority-urgent.active {
  background: var(--kb-priority-urgent-bg);
  border-color: var(--kb-priority-urgent);
  color: var(--kb-priority-urgent);
}

.priority-filter-btn.priority-urgent.active .filter-count {
  background: rgba(239, 68, 68, 0.2);
  color: var(--kb-priority-urgent);
}

.priority-filter-btn.priority-high.active {
  background: var(--kb-priority-high-bg);
  border-color: var(--kb-priority-high);
  color: var(--kb-priority-high);
}

.priority-filter-btn.priority-high.active .filter-count {
  background: rgba(249, 115, 22, 0.2);
  color: var(--kb-priority-high);
}

.priority-filter-btn.priority-medium.active {
  background: var(--kb-priority-medium-bg);
  border-color: var(--kb-priority-medium);
  color: var(--kb-priority-medium);
}

.priority-filter-btn.priority-medium.active .filter-count {
  background: rgba(59, 130, 246, 0.2);
  color: var(--kb-priority-medium);
}

.priority-filter-btn.priority-low.active {
  background: var(--kb-priority-low-bg);
  border-color: var(--kb-priority-low);
  color: var(--kb-priority-low);
}

.priority-filter-btn.priority-low.active .filter-count {
  background: rgba(34, 197, 94, 0.2);
  color: var(--kb-priority-low);
}

/* Sort Toggle */
.sort-toggle-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--kb-border);
  background: transparent;
  color: var(--kb-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.sort-toggle-btn:hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-border-strong);
}

.sort-toggle-btn.active {
  background: var(--kb-accent-violet-soft);
  border-color: var(--kb-accent-violet);
  color: var(--kb-accent-violet);
}

.sort-toggle-btn svg {
  width: 14px;
  height: 14px;
}

/* ============================================
   Board Content & Columns
   ============================================ */
.board-content {
  flex: 1;
  overflow-x: auto;
  padding: 24px;
  background: var(--kb-bg-deep);
  background-image:
    radial-gradient(circle at 20% 50%, rgba(139, 92, 246, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.03) 0%, transparent 50%);
}

.columns-container {
  display: flex;
  gap: 20px;
  height: 100%;
  align-items: flex-start;
  padding-bottom: 20px;
}

/* ============================================
   Kanban Column
   ============================================ */
.kanban-column {
  min-width: 320px;
  max-width: 320px;
  background: var(--kb-bg-surface);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 240px);
  flex-shrink: 0;
  border: 1px solid var(--kb-border);
  box-shadow: var(--kb-shadow-md);
  transition: all var(--kb-transition-normal);
}

.kanban-column:hover {
  border-color: var(--kb-border-strong);
}

.kanban-column.drag-over {
  background: var(--kb-accent-amber-soft);
  border: 2px dashed var(--kb-accent-amber);
  transform: scale(1.01);
}

.kanban-column.column-drag-over {
  border-left: 3px solid var(--kb-accent-violet);
}

.kanban-column.column-dragging {
  opacity: 0.5;
  transform: rotate(2deg);
}

/* Column Header */
.column-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px;
  border-bottom: 1px solid var(--kb-border);
  cursor: grab;
  transition: background var(--kb-transition-fast);
}

.column-header:hover {
  background: var(--kb-bg-hover);
}

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

.column-header h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--kb-text-primary);
  flex: 1;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 6px;
  transition: background var(--kb-transition-fast);
  letter-spacing: -0.01em;
}

.column-header h3:hover {
  background: var(--kb-bg-elevated);
}

.card-count {
  font-family: var(--kb-font-mono);
  font-size: 12px;
  color: var(--kb-text-muted);
  background: var(--kb-bg-elevated);
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 500;
}

/* Column Menu */
.column-menu {
  position: relative;
}

.menu-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--kb-text-muted);
  font-size: 16px;
  transition: all var(--kb-transition-fast);
}

.menu-btn:hover {
  background: var(--kb-bg-elevated);
  color: var(--kb-text-primary);
}

.menu-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--kb-bg-elevated);
  border-radius: 10px;
  box-shadow: var(--kb-shadow-lg);
  min-width: 160px;
  z-index: 10;
  border: 1px solid var(--kb-border-strong);
  overflow: hidden;
}

.menu-dropdown button {
  width: 100%;
  padding: 12px 16px;
  border: none;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-size: 13px;
  color: var(--kb-text-secondary);
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.menu-dropdown button:hover {
  background: var(--kb-bg-hover);
  color: var(--kb-priority-urgent);
}

/* Column Cards Container */
.column-cards {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.column-cards::-webkit-scrollbar {
  width: 6px;
}

.column-cards::-webkit-scrollbar-track {
  background: transparent;
}

.column-cards::-webkit-scrollbar-thumb {
  background: var(--kb-border-strong);
  border-radius: 3px;
}

.column-cards::-webkit-scrollbar-thumb:hover {
  background: var(--kb-text-muted);
}

/* ============================================
   Kanban Card
   ============================================ */
.kanban-card {
  background: var(--kb-bg-elevated);
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
  border: 1px solid var(--kb-border);
  transition: all var(--kb-transition-fast);
  position: relative;
}

.kanban-card:hover {
  border-color: var(--kb-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--kb-shadow-md);
}

.kanban-card.dragging {
  opacity: 0.6;
  transform: rotate(3deg) scale(1.02);
  box-shadow: var(--kb-shadow-lg);
}

.kanban-card.drag-over {
  border-top: 3px solid var(--kb-accent-amber);
  margin-top: -3px;
}

/* Priority-based card accents */
.kanban-card.priority-urgent {
  border-left: 3px solid var(--kb-priority-urgent);
}

.kanban-card.priority-high {
  border-left: 3px solid var(--kb-priority-high);
}

.kanban-card.priority-medium {
  border-left: 3px solid var(--kb-priority-medium);
}

.kanban-card.priority-low {
  border-left: 3px solid var(--kb-priority-low);
}

/* Blocked card */
.kanban-card.blocked {
  background: linear-gradient(135deg, var(--kb-bg-elevated) 0%, rgba(239, 68, 68, 0.08) 100%);
}

/* Card Top Row */
.card-top-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.priority-badge {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 6px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
}

.priority-badge.priority-urgent {
  background: var(--kb-priority-urgent-bg);
  color: var(--kb-priority-urgent);
}

.priority-badge.priority-high {
  background: var(--kb-priority-high-bg);
  color: var(--kb-priority-high);
}

.priority-badge.priority-medium {
  background: var(--kb-priority-medium-bg);
  color: var(--kb-priority-medium);
}

.priority-badge.priority-low {
  background: var(--kb-priority-low-bg);
  color: var(--kb-priority-low);
}

.blocked-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 4px 8px;
  background: var(--kb-priority-urgent);
  color: white;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: var(--kb-font-mono);
}

/* Card Content */
.card-title {
  font-size: 14px;
  color: var(--kb-text-primary);
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 4px;
}

.card-description {
  font-size: 12px;
  color: var(--kb-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

/* Card Footer */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--kb-border);
}

.card-footer:empty {
  display: none;
}

.card-assignee {
  display: flex;
  align-items: center;
  gap: 8px;
}

.assignee-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  color: white;
}

.assignee-name {
  font-size: 12px;
  color: var(--kb-text-secondary);
  font-weight: 500;
}

/* ============================================
   Add Column
   ============================================ */
.add-column {
  min-width: 320px;
  flex-shrink: 0;
}

.add-column-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  background: transparent;
  border: 2px dashed var(--kb-border);
  border-radius: 16px;
  color: var(--kb-text-muted);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--kb-transition-normal);
  font-family: var(--kb-font-sans);
}

.add-column-btn:hover {
  border-color: var(--kb-accent-amber);
  color: var(--kb-accent-amber);
  background: var(--kb-accent-amber-soft);
}

.add-column-btn svg {
  width: 18px;
  height: 18px;
}

/* Add Column Form */
.add-column-form {
  background: var(--kb-bg-surface);
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--kb-border);
  box-shadow: var(--kb-shadow-md);
}

.add-column-form input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--kb-border);
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 12px;
  box-sizing: border-box;
  background: var(--kb-bg-elevated);
  color: var(--kb-text-primary);
  font-family: var(--kb-font-sans);
  transition: all var(--kb-transition-fast);
}

.add-column-form input:focus {
  outline: none;
  border-color: var(--kb-accent-amber);
  box-shadow: 0 0 0 3px var(--kb-accent-amber-soft);
}

.add-column-form input::placeholder {
  color: var(--kb-text-muted);
}

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

.add-column-actions button {
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.add-column-actions button[type="submit"] {
  background: linear-gradient(135deg, var(--kb-accent-amber) 0%, #d97706 100%);
  border: none;
  color: #000;
}

.add-column-actions button[type="submit"]:hover {
  box-shadow: var(--kb-shadow-glow);
  transform: translateY(-1px);
}

.add-column-actions button[type="submit"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.add-column-actions button[type="button"] {
  background: transparent;
  border: 1px solid var(--kb-border);
  color: var(--kb-text-secondary);
}

.add-column-actions button[type="button"]:hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-border-strong);
}

/* ============================================
   Add Card
   ============================================ */
.add-card-btn {
  width: 100%;
  padding: 10px;
  background: transparent;
  border: 1px dashed var(--kb-border);
  border-radius: 10px;
  color: var(--kb-text-muted);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.add-card-btn:hover {
  border-color: var(--kb-accent-amber);
  color: var(--kb-accent-amber);
  background: var(--kb-accent-amber-soft);
}

.add-card-form {
  background: var(--kb-bg-elevated);
  border-radius: 10px;
  padding: 12px;
  border: 1px solid var(--kb-border);
}

.add-card-form textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--kb-border);
  border-radius: 8px;
  font-size: 13px;
  resize: none;
  box-sizing: border-box;
  background: var(--kb-bg-surface);
  color: var(--kb-text-primary);
  font-family: var(--kb-font-sans);
  transition: all var(--kb-transition-fast);
}

.add-card-form textarea:focus {
  outline: none;
  border-color: var(--kb-accent-amber);
  box-shadow: 0 0 0 3px var(--kb-accent-amber-soft);
}

.add-card-form textarea::placeholder {
  color: var(--kb-text-muted);
}

.add-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.add-card-actions button {
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.add-card-actions button[type="submit"] {
  background: linear-gradient(135deg, var(--kb-accent-amber) 0%, #d97706 100%);
  border: none;
  color: #000;
}

.add-card-actions button[type="submit"]:hover {
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.3);
}

.add-card-actions button[type="button"] {
  background: transparent;
  border: 1px solid var(--kb-border);
  color: var(--kb-text-secondary);
}

.add-card-actions button[type="button"]:hover {
  background: var(--kb-bg-hover);
}

/* ============================================
   Edit Title Form
   ============================================ */
.edit-title-form {
  flex: 1;
}

.edit-title-form input {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--kb-accent-amber);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  box-sizing: border-box;
  background: var(--kb-bg-elevated);
  color: var(--kb-text-primary);
  font-family: var(--kb-font-sans);
}

.edit-title-form input:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--kb-accent-amber-soft);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  .board-header {
    flex-direction: column;
    gap: 16px;
    padding: 16px;
  }

  .board-header-left,
  .board-header-right {
    width: 100%;
    justify-content: space-between;
  }

  .priority-filter-bar {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .priority-filters {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .board-content {
    padding: 16px;
  }

  .kanban-column {
    min-width: 280px;
    max-width: 280px;
    max-height: calc(100vh - 320px);
  }

  .add-column {
    min-width: 280px;
  }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.kanban-column {
  animation: fadeIn 0.3s ease-out;
}

.kanban-card {
  animation: fadeIn 0.2s ease-out;
}

/* Subtle pulse for urgent items */
@keyframes urgentPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
  50% { box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.15); }
}

.kanban-card.priority-urgent {
  animation: urgentPulse 3s infinite;
}

/* ============================================
   Card Modal Enhancements
   ============================================ */
.card-modal {
  max-width: 560px;
  background: var(--kb-bg-surface);
  border: 1px solid var(--kb-border);
  color: var(--kb-text-primary);
}

.card-modal .modal-header {
  border-bottom: 1px solid var(--kb-border);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.card-modal .modal-header h2 {
  color: var(--kb-text-primary);
}

.card-modal .close-btn {
  color: var(--kb-text-muted);
}

.card-modal .close-btn:hover {
  color: var(--kb-text-primary);
}

.card-modal .form-group {
  margin-bottom: 20px;
}

.card-modal .form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--kb-text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.card-modal input[type="text"],
.card-modal textarea,
.card-modal select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--kb-border);
  border-radius: 10px;
  font-size: 14px;
  background: var(--kb-bg-elevated);
  color: var(--kb-text-primary);
  font-family: var(--kb-font-sans);
  transition: all var(--kb-transition-fast);
  box-sizing: border-box;
}

.card-modal input[type="text"]:focus,
.card-modal textarea:focus,
.card-modal select:focus {
  outline: none;
  border-color: var(--kb-accent-amber);
  box-shadow: 0 0 0 3px var(--kb-accent-amber-soft);
}

.card-modal input::placeholder,
.card-modal textarea::placeholder {
  color: var(--kb-text-muted);
}

.card-modal select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

/* Priority Selector in Modal */
.priority-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.priority-option {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--kb-border);
  background: var(--kb-bg-elevated);
  color: var(--kb-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.priority-option:hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-border-strong);
}

.priority-option.selected {
  border-width: 2px;
}

.priority-option[data-priority="urgent"].selected {
  background: var(--kb-priority-urgent-bg);
  border-color: var(--kb-priority-urgent);
  color: var(--kb-priority-urgent);
}

.priority-option[data-priority="high"].selected {
  background: var(--kb-priority-high-bg);
  border-color: var(--kb-priority-high);
  color: var(--kb-priority-high);
}

.priority-option[data-priority="medium"].selected {
  background: var(--kb-priority-medium-bg);
  border-color: var(--kb-priority-medium);
  color: var(--kb-priority-medium);
}

.priority-option[data-priority="low"].selected {
  background: var(--kb-priority-low-bg);
  border-color: var(--kb-priority-low);
  color: var(--kb-priority-low);
}

.priority-option .priority-icon {
  font-size: 12px;
}

/* Checkbox Group */
.card-modal .checkbox-group {
  background: var(--kb-bg-elevated);
  border-radius: 10px;
  padding: 14px;
  border: 1px solid var(--kb-border);
}

.card-modal .checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.card-modal .checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--kb-accent-amber);
  cursor: pointer;
}

.card-modal .checkbox-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--kb-text-primary);
}

.card-modal .checkbox-hint {
  display: block;
  font-size: 12px;
  color: var(--kb-text-muted);
  margin-top: 6px;
  margin-left: 28px;
}

/* Modal Actions */
.card-modal .modal-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--kb-border);
  margin-top: 24px;
}

.card-modal .modal-actions button {
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.card-modal .delete-btn {
  background: transparent;
  border: 1px solid var(--kb-priority-urgent);
  color: var(--kb-priority-urgent);
}

.card-modal .delete-btn:hover {
  background: var(--kb-priority-urgent-bg);
}

.card-modal .modal-actions-right button:not(.primary) {
  background: transparent;
  border: 1px solid var(--kb-border);
  color: var(--kb-text-secondary);
}

.card-modal .modal-actions-right button:not(.primary):hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-border-strong);
}

.card-modal .modal-actions button.primary {
  background: linear-gradient(135deg, var(--kb-accent-amber) 0%, #d97706 100%);
  border: none;
  color: #000;
}

.card-modal .modal-actions button.primary:hover {
  box-shadow: var(--kb-shadow-glow);
  transform: translateY(-1px);
}

/* Comments Section */
.card-modal .comments-section {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--kb-border);
}

.card-modal .comments-section h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--kb-text-primary);
  margin: 0 0 16px;
}

.card-modal .comments-list {
  max-height: 250px;
  overflow-y: auto;
  margin-bottom: 16px;
}

.card-modal .comment {
  background: var(--kb-bg-elevated);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 10px;
  border: 1px solid var(--kb-border);
}

.card-modal .comment-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.card-modal .comment-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  color: white;
}

.card-modal .comment-author {
  font-size: 13px;
  font-weight: 600;
  color: var(--kb-text-primary);
}

.card-modal .comment-date {
  font-size: 11px;
  color: var(--kb-text-muted);
  margin-left: auto;
}

.card-modal .comment-delete-btn {
  background: none;
  border: none;
  color: var(--kb-text-muted);
  cursor: pointer;
  font-size: 16px;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all var(--kb-transition-fast);
}

.card-modal .comment-delete-btn:hover {
  background: var(--kb-priority-urgent-bg);
  color: var(--kb-priority-urgent);
}

.card-modal .comment-content {
  font-size: 13px;
  color: var(--kb-text-secondary);
  line-height: 1.5;
}

.card-modal .no-comments {
  font-size: 13px;
  color: var(--kb-text-muted);
  text-align: center;
  padding: 20px;
}

.card-modal .comment-form textarea {
  margin-bottom: 10px;
}

.card-modal .comment-form button {
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: var(--kb-bg-elevated);
  border: 1px solid var(--kb-border);
  color: var(--kb-text-secondary);
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.card-modal .comment-form button:hover {
  background: var(--kb-bg-hover);
  border-color: var(--kb-accent-amber);
  color: var(--kb-accent-amber);
}

/* ============================================
   Board List Page Enhancements
   ============================================ */
.board-list-page {
  background: var(--kb-bg-deep);
  padding: 0;
  min-height: 100%;
}

.board-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.board-list-header h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 600;
  color: var(--kb-text-primary);
  letter-spacing: -0.02em;
  font-family: var(--kb-font-sans);
}

.create-board-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--kb-accent-amber) 0%, #d97706 100%);
  color: #000;
  border: none;
  padding: 12px 20px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all var(--kb-transition-fast);
  font-family: var(--kb-font-sans);
}

.create-board-btn:hover {
  box-shadow: var(--kb-shadow-glow);
  transform: translateY(-1px);
}

.boards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.board-card {
  background: var(--kb-bg-surface);
  border: 1px solid var(--kb-border);
  border-radius: 16px;
  padding: 24px;
  cursor: pointer;
  transition: all var(--kb-transition-normal);
}

.board-card:hover {
  border-color: var(--kb-accent-amber);
  box-shadow: var(--kb-shadow-md), 0 0 20px rgba(245, 158, 11, 0.1);
  transform: translateY(-4px);
}

.board-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--kb-text-primary);
  letter-spacing: -0.01em;
  font-family: var(--kb-font-sans);
}

.board-card p {
  margin: 0 0 16px;
  color: var(--kb-text-muted);
  font-size: 14px;
  line-height: 1.5;
}

.board-meta {
  display: flex;
  gap: 8px;
}

.board-role {
  font-size: 11px;
  padding: 4px 10px;
  background: var(--kb-bg-elevated);
  border-radius: 6px;
  color: var(--kb-text-secondary);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  font-family: var(--kb-font-mono);
}

.connecting-message,
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--kb-text-muted);
  font-size: 15px;
}