/* ═══════════════════════════════════════════════════════════════════════
   OmniRouteAI Dashboard — Premium Dark Mode Design System
   ═══════════════════════════════════════════════════════════════════════ */

/* ─── CSS Variables / Design Tokens ───────────────────────────────────── */
:root {
  /* Background layers */
  --bg-base: #0a0e1a;
  --bg-surface: #111827;
  --bg-surface-2: #1a2235;
  --bg-elevated: #1f2a40;
  --bg-hover: #253048;

  /* Brand gradient */
  --gradient-brand: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
  --gradient-card: linear-gradient(145deg, rgba(99,102,241,0.08), rgba(139,92,246,0.04));
  --gradient-glow: radial-gradient(ellipse at top, rgba(99,102,241,0.15), transparent);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #a78bfa;

  /* Status colors */
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-error: #f87171;
  --color-info: #60a5fa;

  /* Borders */
  --border-subtle: rgba(148, 163, 184, 0.1);
  --border-default: rgba(148, 163, 184, 0.15);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(99,102,241,0.2);

  /* Sizing */
  --sidebar-width: 240px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Sidebar ──────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  transition: transform var(--transition-normal);
}

.sidebar-brand {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-brand);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-glow);
}

.sidebar-brand h1 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-accent {
  color: var(--text-accent);
}

.sidebar-nav {
  flex: 1;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
  transition: all var(--transition-fast);
}

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

.nav-link.active {
  background: rgba(99,102,241,0.15);
  color: var(--text-accent);
}

.nav-icon {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.health-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.health-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background var(--transition-normal);
}

.health-dot.healthy {
  background: var(--color-success);
  box-shadow: 0 0 8px rgba(52,211,153,0.5);
}

.health-dot.degraded {
  background: var(--color-warning);
  box-shadow: 0 0 8px rgba(251,191,36,0.5);
}

.health-dot.error {
  background: var(--color-error);
  box-shadow: 0 0 8px rgba(248,113,113,0.5);
}

/* ─── Mobile Toggle ────────────────────────────────────────────────────── */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.3rem;
  align-items: center;
  justify-content: center;
}

/* ─── Main Content ─────────────────────────────────────────────────────── */
.main {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 2rem;
  min-height: 100vh;
  background: var(--gradient-glow) no-repeat top center;
  background-size: 100% 400px;
}

/* ─── Pages ────────────────────────────────────────────────────────────── */
.page {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.page-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-actions {
  display: flex;
  gap: 0.5rem;
}

/* ─── Cards ────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* ─── Stat Cards ──────────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-brand);
  opacity: 0.6;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── Tables ───────────────────────────────────────────────────────────── */
.table-container {
  overflow-x: auto;
}

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

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-default);
}

.data-table td {
  padding: 0.7rem 1rem;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.data-table tr:hover td {
  background: var(--bg-hover);
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem;
}

/* ─── Badges ───────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-success {
  background: rgba(52,211,153,0.15);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(251,191,36,0.15);
  color: var(--color-warning);
}

.badge-error {
  background: rgba(248,113,113,0.15);
  color: var(--color-error);
}

.badge-info {
  background: rgba(96,165,250,0.15);
  color: var(--color-info);
}

/* ─── Buttons ──────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.btn-primary {
  background: var(--gradient-brand);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 28px rgba(99,102,241,0.35);
}

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

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

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

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

.btn-danger {
  background: rgba(248,113,113,0.15);
  color: var(--color-error);
  border: 1px solid rgba(248,113,113,0.3);
}

.btn-danger:hover {
  background: rgba(248,113,113,0.25);
}

.btn-sm {
  padding: 0.3rem 0.6rem;
  font-size: 0.78rem;
}

/* ─── Forms ────────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-hint {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.form-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.input {
  background: var(--bg-base);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.85rem;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-family: inherit;
  transition: border-color var(--transition-fast);
  outline: none;
  min-width: 160px;
}

.input:focus {
  border-color: var(--text-accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

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

select.input {
  cursor: pointer;
}

/* ─── Providers Grid ──────────────────────────────────────────────────── */
.providers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

.provider-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  transition: all var(--transition-normal);
}

.provider-card:hover {
  border-color: rgba(99,102,241,0.3);
  box-shadow: var(--shadow-glow);
}

.provider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.provider-name {
  font-size: 1.1rem;
  font-weight: 600;
}

.provider-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.provider-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.provider-meta-value {
  color: var(--text-secondary);
  font-weight: 500;
}

.provider-models {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.model-tag {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-family: 'SF Mono', 'Menlo', monospace;
}

.provider-actions {
  display: flex;
  gap: 0.5rem;
}

/* ─── Actions Grid ─────────────────────────────────────────────────────── */
.actions-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ─── Code Block ───────────────────────────────────────────────────────── */
.code-block {
  background: var(--bg-base);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
  font-size: 0.82rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
  overflow-y: auto;
}

/* ─── Toast Notifications ──────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: slideInRight 0.3s ease;
  max-width: 380px;
}

.toast.success { border-left: 3px solid var(--color-success); }
.toast.error { border-left: 3px solid var(--color-error); }
.toast.warning { border-left: 3px solid var(--color-warning); }
.toast.info { border-left: 3px solid var(--color-info); }

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ─── Responsive ───────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-toggle {
    display: flex;
  }

  .main {
    margin-left: 0;
    padding: 1rem;
    padding-top: 3.5rem;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .form-row {
    flex-direction: column;
    align-items: stretch;
  }

  .input {
    min-width: 100%;
  }

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

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

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-default);
  border-radius: 6px;
}

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

/* ─── Utility ──────────────────────────────────────────────────────────── */
.mono {
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
}

.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-info { color: var(--color-info); }
.text-muted { color: var(--text-muted); }
/* ─── Modals ───────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 450px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}

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

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.modal-body {
  padding: 1.5rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 2rem;
}