/* Self-hosted Inter variable font (weights 100-900) */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/fonts/InterVariable.woff2') format('woff2');
}

/* ==================== CSS Reset & Variables ==================== */
:root {
  /* Primary - Deep Blue */
  --primary: #1e3a5f;
  --primary-light: #2563eb;
  --primary-dark: #0f2440;
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-600: #1d4ed8;
  --primary-700: #1e40af;
  --primary-800: #1e3a8a;

  /* Accent - Gold */
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --accent-dark: #d97706;

  /* Semantic */
  --success: #059669;
  --success-light: #d1fae5;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;

  /* Gray Scale */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  /* Surfaces */
  --surface: #ffffff;
  --surface-glass: rgba(255,255,255,0.8);
  --surface-dark: #0f172a;
  --surface-dark-lighter: #1e293b;

  /* Border */
  --border: #e2e8f0;
  --border-light: #f1f5f9;

  /* Radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 50px -12px rgba(0,0,0,0.15);
  --shadow-glow: 0 0 20px rgba(37,99,235,0.15);

  /* Transition */
  --transition-fast: all 0.15s ease;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--gray-800);
  background: var(--gray-50);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary-light); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--primary); }

img { max-width: 100%; height: auto; }

/* ==================== Utilities ==================== */
.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  letter-spacing: 0.01em;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: var(--transition-fast);
  pointer-events: none;
}

.btn:active::after {
  background: rgba(255,255,255,0.1);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-700));
  color: white;
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}
.btn-primary:hover {
  box-shadow: 0 4px 16px rgba(37,99,235,0.4);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  box-shadow: 0 2px 8px rgba(5,150,105,0.3);
}
.btn-success:hover {
  box-shadow: 0 4px 16px rgba(5,150,105,0.4);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  box-shadow: 0 2px 8px rgba(220,38,38,0.3);
}
.btn-danger:hover {
  box-shadow: 0 4px 16px rgba(220,38,38,0.4);
  transform: translateY(-1px);
}

.btn-outline {
  background: white;
  color: var(--gray-700);
  border: 1.5px solid var(--gray-300);
  box-shadow: var(--shadow-xs);
}
.btn-outline:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
  box-shadow: var(--shadow-sm);
}

.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: var(--radius-sm); }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: var(--radius-lg); }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ==================== Card ==================== */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

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

.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--gray-50);
}

.card-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-800);
}

.card-body {
  padding: 24px;
}

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

.form-label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-600);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--gray-800);
  background: white;
  transition: var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.1);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--gray-400);
}

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

/* ==================== Grid ==================== */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 16px; }
}

@media (max-width: 480px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ==================== Badge ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.badge-primary { background: var(--primary-100); color: var(--primary-light); }
.badge-success { background: var(--success-light); color: var(--success); }

/* ==================== Modal ==================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: white;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 16px;
  color: var(--gray-800);
}

.modal-body { padding: 24px; }

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--gray-400);
  transition: var(--transition-fast);
  padding: 4px;
  border-radius: var(--radius-sm);
}
.modal-close:hover {
  color: var(--gray-600);
  background: var(--gray-100);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ==================== Loading ==================== */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
}

.loading-spinner::after {
  content: '';
  width: 36px;
  height: 36px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary-light);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ==================== Toast ==================== */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 14px 24px;
  border-radius: var(--radius);
  background: var(--gray-800);
  color: white;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toastSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 380px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ==================== Pagination ==================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 24px 0;
}

.pagination button {
  min-width: 38px;
  height: 38px;
  border: 1.5px solid var(--gray-200);
  background: white;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  transition: var(--transition);
}

.pagination button:hover:not(:disabled) {
  background: var(--gray-50);
  border-color: var(--gray-300);
}

.pagination button.active {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-700));
  color: white;
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ==================== Empty State ==================== */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--gray-400);
}

.empty-state svg {
  width: 72px;
  height: 72px;
  margin-bottom: 20px;
}

.empty-state p {
  font-size: 15px;
  font-weight: 500;
}

/* ==================== Data Table ==================== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 700;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--gray-50);
  border-bottom: 2px solid var(--border);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

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

.data-table tbody tr:hover {
  background: var(--primary-50);
}

/* ==================== Progress Bar ==================== */
.progress-bar {
  height: 10px;
  background: var(--gray-100);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-light), var(--primary-600));
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-full);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-400);
}