/*
  Flow Kanban - Modern Trello-style CSS
*/
:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #1f2937;
  --bg-card-hover: #2d3748;
  --border-color: #374151;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --p0-red: #ef4444;
  --p0-bg: rgba(239, 68, 68, 0.15);
  --p1-yellow: #f59e0b;
  --p1-bg: rgba(245, 158, 11, 0.15);
  --p2-blue: #3b82f6;
  --p2-bg: rgba(59, 130, 246, 0.15);
  --success-green: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --column-bg: #131b2e;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Header & Navbar */
header {
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  cursor: pointer;
}

.brand-badge {
  font-size: 0.65rem;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 9999px;
  background: rgba(96, 165, 250, 0.2);
  color: #93c5fd;
  -webkit-text-fill-color: initial;
  font-weight: 700;
  letter-spacing: 0.5px;
}

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

.search-bar {
  background: #1e293b;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 14px;
  color: var(--text-primary);
  font-size: 0.875rem;
  width: 220px;
  transition: all 0.2s;
}

.search-bar:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
  width: 280px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  background: #1f2937;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #374151;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: #1e293b;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
  background: #8b5cf6;
}

/* Board Sub-header / Filter Bar */
.board-header {
  background: #0f172a;
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.board-title-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.board-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-btn.active, .filter-btn:hover {
  background: #1e293b;
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

/* Kanban Board Container */
.board-container {
  flex: 1;
  display: flex;
  gap: 18px;
  padding: 20px 24px;
  overflow-x: auto;
  align-items: flex-start;
}

/* Kanban Column */
.column {
  background: var(--column-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 320px;
  min-width: 320px;
  max-height: calc(100vh - 170px);
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.column-header {
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.column-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
}

.task-count {
  background: #1e293b;
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 600;
}

.cards-container {
  padding: 12px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 120px;
}

.cards-container.drag-over {
  background: rgba(59, 130, 246, 0.08);
  border: 2px dashed var(--accent-blue);
  border-radius: 8px;
}

/* Task Card */
.task-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 10px;
  padding: 14px;
  cursor: grab;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  position: relative;
  user-select: none;
}

.task-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-card-hover);
}

.task-card.dragging {
  opacity: 0.5;
  transform: scale(0.98);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
  gap: 6px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 7px;
  border-radius: 6px;
  letter-spacing: 0.3px;
}

.badge-p0 {
  background: var(--p0-bg);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-p1 {
  background: var(--p1-bg);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-p2 {
  background: var(--p2-bg);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-cat {
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
}

.card-title {
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.card-notes {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 10px;
}

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

.due-date {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
}

.due-date.urgent {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  font-weight: 700;
}

.assignee {
  display: flex;
  align-items: center;
  gap: 6px;
}

.avatar-sm {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 0.65rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.quick-complete-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  transition: color 0.15s;
  padding: 2px;
}

.quick-complete-btn:hover {
  color: var(--success-green);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 100;
  padding: 16px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  width: 100%;
  max-width: 520px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

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

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
}

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

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input, .form-select, .form-textarea {
  background: #1f2937;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: inherit;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.5);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 200;
}

.toast {
  background: #1e293b;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-blue);
  color: white;
  padding: 12px 18px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.25s ease-out;
}

.toast.success {
  border-left-color: var(--success-green);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .board-container {
    padding: 12px;
    gap: 12px;
  }
  .column {
    width: 280px;
    min-width: 280px;
  }
  .search-bar {
    display: none;
  }
}