:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --card-border: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-emerald: #10b981;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;
  --danger: #ef4444;
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
}

/* Navbar */
.navbar {
  background: rgba(30, 41, 59, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 24px;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.brand-icon {
  font-size: 2rem;
  color: #38bdf8;
}

.brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #f8fafc;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* User Profile & Buttons */
.user-profile-section {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #334155;
  padding: 6px 14px;
  border-radius: 30px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-lid {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.btn-lid:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-secondary { background: #334155; color: #f8fafc; }
.btn-secondary:hover { background: #475569; }

.btn-success { background: var(--accent-emerald); color: #fff; }
.btn-success:hover { background: #059669; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-lg { padding: 12px 24px; font-size: 1.05rem; }

/* Main Container */
.app-container {
  max-width: 1400px;
  margin: 24px auto;
  padding: 0 24px;
}

/* Guest Hero Card */
.auth-guest-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 60px 40px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  margin-top: 40px;
}

.hero-content h2 {
  font-size: 2rem;
  margin-bottom: 16px;
  color: #38bdf8;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Quota & Stats Grid */
.stats-quota-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 1024px) {
  .stats-quota-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 18px 20px;
}

.quota-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.quota-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.quota-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: #38bdf8;
}

.quota-badge {
  font-size: 0.85rem;
  background: #334155;
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 700;
}

.progress-bar-container {
  height: 10px;
  background: #0f172a;
  border-radius: 6px;
  overflow: hidden;
  margin: 8px 0;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #3b82f6);
  border-radius: 6px;
  transition: width 0.4s ease;
}

.progress-bar-fill.warning { background: linear-gradient(90deg, #f59e0b, #ef4444); }
.progress-bar-fill.danger { background: var(--danger); }

.quota-footer {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.mini-stat {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mini-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.icon-blue { background: rgba(37, 99, 235, 0.2); color: #60a5fa; }
.icon-emerald { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.icon-purple { background: rgba(139, 92, 246, 0.2); color: #a78bfa; }

.stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f8fafc;
}

.stat-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Tabs Nav */
.tab-nav {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 20px;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 12px 20px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s ease;
}

.tab-btn:hover { color: #f8fafc; }
.tab-btn.active {
  color: #38bdf8;
  border-bottom-color: #38bdf8;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Filter Card */
.filter-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 20px;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.filter-search {
  grid-column: span 2;
}

@media (max-width: 768px) {
  .filter-search { grid-column: span 1; }
}

.filter-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  background: #0f172a;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  color: #f8fafc;
  font-family: inherit;
  font-size: 0.9rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
}

/* Data Tables */
.table-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  background: #0f172a;
  padding: 12px 16px;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--card-border);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  font-size: 0.9rem;
}

.data-table tr:hover {
  background: rgba(51, 65, 85, 0.3);
}

.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-info { background: rgba(37, 99, 235, 0.2); color: #60a5fa; }
.badge-success { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-icon { font-size: 3rem; margin-bottom: 12px; color: #475569; }

/* Upload Area */
.upload-container-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.drop-zone {
  border: 2px dashed #3b82f6;
  border-radius: 12px;
  padding: 50px 20px;
  text-align: center;
  background: rgba(59, 130, 246, 0.05);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 16px;
}

.drop-zone:hover, .drop-zone.dragover {
  background: rgba(59, 130, 246, 0.15);
  border-color: #60a5fa;
}

.drop-icon {
  font-size: 3.5rem;
  color: #3b82f6;
  margin-bottom: 12px;
}

.hidden-file-input { display: none; }

.alert {
  padding: 14px 18px;
  border-radius: 8px;
  margin-top: 16px;
  font-size: 0.9rem;
}
.alert-info { background: rgba(37, 99, 235, 0.15); border: 1px solid #2563eb; color: #93c5fd; }

.spin {
  display: inline-block;
  animation: spin 1s infinite linear;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Header Action */
.card-header-action {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.modal-large {
  max-width: 950px;
  height: 85vh;
  display: flex;
  flex-direction: column;
}

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

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-body { padding: 20px; }
.preview-body { flex: 1; padding: 0; overflow: hidden; }

.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.preview-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #fff;
}

.hidden { display: none !important; }