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

:root {
  --bg-primary: #fafbfc;
  --bg-card: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;

  /* Candy colors */
  --candy-pink: #ff6b9d;
  --candy-purple: #c084fc;
  --candy-blue: #60a5fa;
  --candy-cyan: #22d3ee;
  --candy-green: #4ade80;
  --candy-yellow: #fbbf24;
  --candy-orange: #fb923c;
  --candy-red: #f87171;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
  --shadow-glow-pink: 0 0 20px rgba(255,107,157,0.3);
  --shadow-glow-blue: 0 0 20px rgba(96,165,250,0.3);
  --shadow-glow-purple: 0 0 20px rgba(192,132,252,0.3);
  --shadow-glow-green: 0 0 20px rgba(74,222,128,0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

/* Login Screen */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  background: var(--bg-card);
  padding: 48px;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-logo {
  width: 72px;
  height: 72px;
  background: #ffa0a0;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: var(--shadow-glow-pink);
}

.login-logo svg {
  width: 40px;
  height: 40px;
  fill: white;
}

.login-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
}

.login-subtitle {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.input-group {
  margin-bottom: 24px;
}

.input-group input {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 16px;
  transition: all 0.2s;
  background: var(--bg-primary);
}

.input-group input:focus {
  outline: none;
  border-color: var(--candy-purple);
  box-shadow: 0 0 0 4px rgba(192,132,252,0.1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, #ff9cbd, #ffaa96);
  color: white;
  width: 100%;
  box-shadow: var(--shadow-md), var(--shadow-glow-pink);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(255,107,157,0.4);
}

.error-message {
  color: var(--candy-red);
  font-size: 14px;
  margin-top: 12px;
}

/* Dashboard Layout */
.dashboard {
  display: none;
}

.dashboard.active {
  display: block;
}

.header {
  background: var(--bg-card);
  padding: 16px 32px;
  box-shadow: var(--shadow-md);
  border-bottom: 2px solid #f3f4f6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-logo {
  width: 40px;
  height: 40px;
  background: #ffa0a0;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow-pink);
}

.header-logo svg {
  width: 24px;
  height: 24px;
  fill: white;
}

.header-title {
  font-size: 20px;
  font-weight: 600;
}

.btn-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  padding: 0;
  transition: all 0.2s;
}

.btn-logout:hover {
  background: #f3f4f6;
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-logout svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

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

.github-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  transition: all 0.2s;
  text-decoration: none;
}

.github-link:hover {
  background: #f3f4f6;
  color: var(--text-primary);
  transform: translateY(-2px);
}

.github-link svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* Navigation */
.nav-tabs {
  display: flex;
  gap: 8px;
  padding: 20px 32px;
  background: var(--bg-card);
  border-bottom: 1px solid #f3f4f6;
  overflow-x: auto;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
  white-space: nowrap;
}

.nav-tab:hover {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.nav-tab.active {
  background: linear-gradient(135deg, #ff9cbd, #ffaa96);
  color: white;
  box-shadow: var(--shadow-md), var(--shadow-glow-pink);
}

.nav-tab svg {
  width: 18px;
  height: 18px;
}

/* Main Content */
.main-content {
  padding: 32px;
  max-width: 1600px;
  margin: 0 auto;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  padding: 24px;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.stat-icon.pink { background: linear-gradient(135deg, var(--candy-pink), #ff8fab); box-shadow: var(--shadow-glow-pink); }
.stat-icon.blue { background: linear-gradient(135deg, var(--candy-blue), #93c5fd); box-shadow: var(--shadow-glow-blue); }
.stat-icon.purple { background: linear-gradient(135deg, var(--candy-purple), #d8b4fe); box-shadow: var(--shadow-glow-purple); }
.stat-icon.green { background: linear-gradient(135deg, var(--candy-green), #86efac); box-shadow: var(--shadow-glow-green); }
.stat-icon.cyan { background: linear-gradient(135deg, var(--candy-cyan), #67e8f9); }
.stat-icon.yellow { background: linear-gradient(135deg, var(--candy-yellow), #fcd34d); }
.stat-icon.orange { background: linear-gradient(135deg, var(--candy-orange), #fdba74); }

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

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

/* Tables */
.card {
  background: var(--bg-card);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  margin-bottom: 24px;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid #f3f4f6;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
}

.search-input {
  padding: 10px 16px;
  border: 2px solid #e5e7eb;
  border-radius: 10px;
  font-size: 14px;
  width: 260px;
  background: var(--bg-primary);
}

.search-input:focus {
  outline: none;
  border-color: var(--candy-purple);
}

.table-container {
  overflow-x: auto;
}

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

th {
  text-align: left;
  padding: 14px 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--bg-primary);
  border-bottom: 1px solid #e5e7eb;
}

td {
  padding: 16px 20px;
  font-size: 14px;
  border-bottom: 1px solid #f3f4f6;
}

tr:hover {
  background: #fafbfc;
}

.badge {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.badge-active {
  background: rgba(74,222,128,0.15);
  color: #16a34a;
}

.badge-disabled {
  background: rgba(248,113,113,0.15);
  color: #dc2626;
}

.badge-expired {
  background: rgba(156,163,175,0.15);
  color: #6b7280;
}

.badge-admin {
  background: rgba(192,132,252,0.15);
  color: #9333ea;
}

.badge-user {
  background: rgba(96,165,250,0.15);
  color: #2563eb;
}

/* Progress Bars */
.progress-bar {
  height: 8px;
  background: #e5e7eb;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 8px;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s;
}

.progress-fill.low { background: linear-gradient(90deg, var(--candy-green), #86efac); }
.progress-fill.medium { background: linear-gradient(90deg, var(--candy-yellow), #fcd34d); }
.progress-fill.high { background: linear-gradient(90deg, var(--candy-orange), #fdba74); }
.progress-fill.critical { background: linear-gradient(90deg, var(--candy-red), #fca5a5); }

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 20px;
}

.page-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.page-btn:hover:not(:disabled) {
  background: #e5e7eb;
  color: var(--text-primary);
}

.page-btn.active {
  background: linear-gradient(135deg, #ff9cbd, #ffaa96);
  color: white;
  box-shadow: var(--shadow-md), var(--shadow-glow-pink);
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-info {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0 16px;
}

.page-ellipsis {
  color: var(--text-secondary);
  font-size: 14px;
  width: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Charts placeholder */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
}

.chart-card {
  background: var(--bg-card);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  padding: 24px;
}

.chart-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

/* Usage list items */
.usage-item {
  display: flex;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid #f3f4f6;
}

.usage-item:last-child {
  border-bottom: none;
}

.usage-model {
  font-weight: 500;
  color: var(--text-primary);
  min-width: 180px;
}

.usage-tokens {
  color: var(--text-secondary);
  font-size: 13px;
  min-width: 140px;
  text-align: center;
}

.usage-cost {
  font-weight: 600;
  color: var(--candy-purple);
  min-width: 100px;
  margin-left: auto;
  text-align: right;
}

.usage-time {
  color: var(--text-muted);
  font-size: 13px;
  margin-left: auto;
}

/* Model stats specific widths */
#model-stats-container .usage-model {
  flex: 0 0 40%;
  max-width: 40%;
  min-width: 0;
}

#model-stats-container .usage-tokens {
  flex: 0 0 25%;
  max-width: 25%;
  min-width: 0;
  text-align: left;
}

#model-stats-container .usage-cost {
  flex: 0 0 35%;
  max-width: 35%;
  min-width: 0;
  margin-left: 0;
}

/* Loading state */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: var(--text-secondary);
}

.spinner {
  width: 32px;
  height: 32px;
  min-width: 32px;
  min-height: 32px;
  border: 3px solid #e5e7eb;
  border-top-color: var(--candy-purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 12px;
  flex-shrink: 0;
}

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

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  fill: #e5e7eb;
  margin-bottom: 16px;
}

/* Quota cards */
.quota-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quota-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

.quota-label {
  color: var(--text-secondary);
}

.quota-value {
  font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
  .main-content {
    padding: 16px;
  }

  .header {
    padding: 12px 16px;
    box-shadow: var(--shadow-md);
  }

  .header-left {
    gap: 10px;
  }

  .header-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
  }

  .header-logo svg {
    width: 20px;
    height: 20px;
  }

  .header-title {
    display: block;
    font-size: 15px;
    font-weight: 600;
  }

  .header-right {
    gap: 10px;
  }

  .lang-select {
    width: auto;
    min-width: unset;
    padding: 8px 24px 8px 8px;
    font-size: 16px;
    height: 36px;
    line-height: 1;
    background-position: right 6px center;
  }

  .lang-select option {
    font-size: 15px;
  }

  .github-link {
    width: 36px;
    height: 36px;
  }

  .github-link svg {
    width: 18px;
    height: 18px;
  }

  .btn-logout {
    width: 36px;
    height: 36px;
  }

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

  .nav-tabs {
    padding: 12px 16px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-card {
    padding: 16px;
  }

  .stat-value {
    font-size: 24px;
  }

  .charts-grid {
    grid-template-columns: 1fr;
  }
}

/* Hidden class */
.hidden {
  display: none !important;
}

/* Initial loading overlay */
.initial-loading {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.3s ease;
}

.initial-loading.fade-out {
  opacity: 0;
  pointer-events: none;
}

/* Language Selector */
.lang-selector {
  position: relative;
}

.lang-select {
  padding: 10px 28px 10px 10px;
  border: 2px solid #e5e7eb;
  border-radius: 10px;
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  transition: all 0.2s;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  min-width: unset;
  width: auto;
  height: 40px;
  display: inline-flex;
  align-items: center;
}

.lang-select:hover {
  border-color: var(--candy-purple);
  background-color: white;
  transform: translateY(-1px);
}

.lang-select:focus {
  outline: none;
  border-color: var(--candy-purple);
  box-shadow: 0 0 0 3px rgba(192,132,252,0.1);
}

.lang-select option {
  padding: 8px;
  font-size: 14px;
}