/* ============================================
   宏冠日志管理后台 - 专业蓝灰配色主题
   Design: Flat Design + Bento Box Grid
   Color Scheme: Professional Slate Blue
   ============================================ */

/* CSS Variables */
:root {
  --primary: #0F172A;
  --primary-light: #1E293B;
  --secondary: #334155;
  --accent: #0369A1;
  --accent-hover: #0284C7;
  --background: #F8FAFC;
  --surface: #FFFFFF;
  --text-primary: #020617;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --success: #10B981;
  --success-bg: #ECFDF5;
  --danger: #EF4444;
  --danger-bg: #FEF2F2;
  --warning: #F59E0B;
  --warning-bg: #FFFBEB;
  --info: #3B82F6;
  --info-bg: #EFF6FF;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.04);
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --transition: 150ms ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Roboto', sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  transition: all var(--transition);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: var(--shadow-sm);
}

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

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

.btn-secondary:hover {
  background: var(--border-light);
  border-color: var(--text-muted);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover {
  background: #059669;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: #DC2626;
}

.btn-warning {
  background: var(--warning);
  color: white;
}

.btn-warning:hover {
  background: #D97706;
}

.btn-info {
  background: var(--info);
  color: white;
}

.btn-info:hover {
  background: #2563EB;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--border-light);
  color: var(--text-primary);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 16px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius);
}

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

/* ============================================
   Cards - Bento Box Style
   ============================================ */
.card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  padding: 24px;
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-header svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
}

/* Stat Card */
.stat-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  padding: 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-card.stat-blue::before { background: var(--accent); }
.stat-card.stat-green::before { background: var(--success); }
.stat-card.stat-orange::before { background: var(--warning); }
.stat-card.stat-purple::before { background: #8B5CF6; }

.stat-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg {
  width: 24px;
  height: 24px;
}

.stat-icon.blue {
  background: var(--info-bg);
  color: var(--info);
}

.stat-icon.green {
  background: var(--success-bg);
  color: var(--success);
}

.stat-icon.orange {
  background: var(--warning-bg);
  color: var(--warning);
}

.stat-icon.purple {
  background: #F3E8FF;
  color: #8B5CF6;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  overflow: hidden;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.table th {
  background: var(--background);
  font-weight: 600;
  font-size: 13px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.table td {
  font-size: 14px;
  color: var(--text-primary);
}

.table tbody tr {
  transition: background var(--transition);
}

.table tbody tr:hover {
  background: var(--border-light);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--surface);
  transition: all var(--transition);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-control:hover {
  border-color: var(--text-muted);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

.form-control:disabled {
  background: var(--background);
  cursor: not-allowed;
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

select.form-control {
  cursor: pointer;
}

/* ============================================
   Badges
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: var(--success-bg);
  color: #047857;
}

.badge-danger {
  background: var(--danger-bg);
  color: #B91C1C;
}

.badge-warning {
  background: var(--warning-bg);
  color: #B45309;
}

.badge-info {
  background: var(--info-bg);
  color: #1D4ED8;
}

.badge-neutral {
  background: var(--border-light);
  color: var(--text-secondary);
}

/* ============================================
   Modal
   ============================================ */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 40px);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: modalIn 200ms ease;
}

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

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  max-height: calc(100vh - 200px);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  background: var(--background);
}

/* ============================================
   Loading
   ============================================ */
.loading {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

.loading-dark {
  border-color: var(--border);
  border-top-color: var(--accent);
}

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

/* ============================================
   Empty State
   ============================================ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  color: var(--text-muted);
}

.empty-state-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .admin-container {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    position: relative;
    height: auto;
  }
  
  .main-content {
    margin-left: 0;
    padding: 16px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 16px;
  }

  .stat-card {
    padding: 16px;
  }
}

/* ============================================
   Tooltip
   ============================================ */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  background: var(--primary);
  color: white;
  text-align: center;
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 12px;
  position: absolute;
  z-index: 100;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity var(--transition);
  white-space: nowrap;
}

.tooltip .tooltiptext::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: var(--primary) transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

/* ============================================
   Notification
   ============================================ */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 300ms ease;
}

@keyframes slideIn {
  from {
    transform: translateX(120%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.notification-success {
  background: var(--success);
  color: white;
}

.notification-error {
  background: var(--danger);
  color: white;
}

.notification-warning {
  background: var(--warning);
  color: white;
}

.notification-info {
  background: var(--info);
  color: white;
}

/* ============================================
   Utility Classes
   ============================================ */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }

.bg-surface { background: var(--surface); }
.bg-background { background: var(--background); }

.border-t { border-top: 1px solid var(--border); }
.border-b { border-bottom: 1px solid var(--border); }

.cursor-pointer { cursor: pointer; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.p-4 { padding: 16px; }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }