/* Archimedes Design System
 * CSS custom properties + component classes
 * Imported alongside Tailwind for the sidebar layout and reusable components
 */

/* ============================================
   CSS Custom Properties
   ============================================ */

:root {
  /* Primary palette */
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-surface: #ffffff;
  --color-surface-hover: #f8fafc;
  --color-border: #e2e8f0;
  --color-border-subtle: #f1f5f9;

  /* Text */
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94a3b8;
  --color-text-inverse: #ffffff;

  /* Accent */
  --color-accent: #4f46e5;
  --color-accent-hover: #4338ca;
  --color-accent-light: #eef2ff;
  --color-accent-text: #4f46e5;

  /* Semantic */
  --color-success: #16a34a;
  --color-success-light: #f0fdf4;
  --color-warning: #d97706;
  --color-warning-light: #fffbeb;
  --color-danger: #dc2626;
  --color-danger-light: #fef2f2;
  --color-info: #2563eb;
  --color-info-light: #eff6ff;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.07), 0 4px 6px -4px rgb(0 0 0 / 0.05);

  /* Sidebar */
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 64px;
  --sidebar-bg: #0f172a;
  --sidebar-text: #cbd5e1;
  --sidebar-text-active: #ffffff;
  --sidebar-hover: rgba(255, 255, 255, 0.08);
  --sidebar-active: rgba(79, 70, 229, 0.3);
  --sidebar-border: rgba(255, 255, 255, 0.08);
}


/* ============================================
   Sidebar
   ============================================ */

.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 40;
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-brand {
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  border-bottom: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.sidebar-logo {
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.sidebar-brand-text {
  color: var(--sidebar-text-active);
  font-weight: 600;
  font-size: 1.125rem;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-sm) 0;
  overflow-y: auto;
}

.sidebar-section {
  padding: 0 var(--space-sm);
}

.sidebar-section-label {
  padding: var(--space-md) var(--space-lg) var(--space-xs);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sidebar-text);
  opacity: 0.5;
}

.sidebar-section-divider {
  height: 1px;
  background: var(--sidebar-border);
  margin: var(--space-sm) var(--space-lg);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.4375rem var(--space-md);
  border-radius: var(--radius-md);
  color: var(--sidebar-text);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s;
  margin: 1px 0;
}

.sidebar-link:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-text-active);
}

.sidebar-link.active {
  background: var(--sidebar-active);
  color: var(--sidebar-text-active);
}

.sidebar-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.7;
}

.sidebar-link.active svg {
  opacity: 1;
}

.sidebar-footer {
  border-top: 1px solid var(--sidebar-border);
  padding: var(--space-sm);
  flex-shrink: 0;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  margin-top: var(--space-xs);
}

.sidebar-user-avatar {
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.6875rem;
  font-weight: 600;
  flex-shrink: 0;
}

.sidebar-user-name {
  color: var(--sidebar-text);
  font-size: 0.8125rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-signout {
  background: none;
  border: none;
  color: var(--sidebar-text);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0;
  opacity: 0.6;
  transition: opacity 0.15s;
}

.sidebar-signout:hover {
  opacity: 1;
}

/* Mobile sidebar overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 35;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
  padding: var(--space-sm);
}

.sidebar-toggle svg {
  width: 24px;
  height: 24px;
}


/* ============================================
   Main Content
   ============================================ */

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.top-bar {
  height: 52px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  position: sticky;
  top: 0;
  z-index: 30;
  flex-shrink: 0;
}

.top-bar-search {
  position: relative;
}

.search-input {
  width: 280px;
  padding: 0.375rem 0.75rem 0.375rem 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 0.8125rem;
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  transition: all 0.15s;
}

.search-input:focus {
  background-color: var(--color-surface);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
  outline: none;
  width: 360px;
}

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

.search-icon {
  position: absolute;
  left: 0.625rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.page-content {
  padding: var(--space-xl);
  flex: 1;
}


/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.card-elevated {
  box-shadow: var(--shadow-sm);
}

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

.card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.card-body {
  padding: var(--space-lg);
}

.card-body-compact {
  padding: var(--space-md);
}

.card-body-flush {
  padding: 0;
}


/* ============================================
   Stats Grid
   ============================================ */

.stats-grid {
  display: grid;
  gap: var(--space-md);
}

.stats-grid-3 { grid-template-columns: repeat(3, 1fr); }
.stats-grid-4 { grid-template-columns: repeat(4, 1fr); }
.stats-grid-5 { grid-template-columns: repeat(5, 1fr); }
.stats-grid-6 { grid-template-columns: repeat(6, 1fr); }

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-top: var(--space-xs);
  line-height: 1.2;
}

.stat-detail {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: var(--space-xs);
}


/* ============================================
   Data Table
   ============================================ */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table thead th {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-weight: 500;
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.data-table tbody td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-text-primary);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background: var(--color-surface-hover);
}

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

.data-table .text-right { text-align: right; }
.data-table .text-center { text-align: center; }


/* ============================================
   Badges
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.badge-green { background: var(--color-success-light); color: var(--color-success); }
.badge-red { background: var(--color-danger-light); color: var(--color-danger); }
.badge-yellow { background: var(--color-warning-light); color: var(--color-warning); }
.badge-blue { background: var(--color-info-light); color: var(--color-info); }
.badge-gray { background: var(--color-bg-tertiary); color: var(--color-text-secondary); }
.badge-indigo { background: var(--color-accent-light); color: var(--color-accent-text); }

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot-green { background: var(--color-success); }
.dot-red { background: var(--color-danger); }
.dot-yellow { background: var(--color-warning); }
.dot-gray { background: var(--color-text-tertiary); }

.dot-pulse {
  animation: pulse 2s infinite;
}


/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  border: 1px solid transparent;
  text-decoration: none;
  line-height: 1.25;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

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

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

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

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

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

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

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

.btn-sm {
  padding: 0.25rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-xs {
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
}


/* ============================================
   Page Header
   ============================================ */

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.page-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-sm);
}

.breadcrumb a {
  color: var(--color-accent-text);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}


/* ============================================
   Tabs
   ============================================ */

.ds-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  gap: 0;
  margin-bottom: var(--space-xl);
}

.ds-tab {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.ds-tab:hover {
  color: var(--color-text-primary);
}

.ds-tab.active {
  color: var(--color-accent-text);
  border-bottom-color: var(--color-accent);
}


/* ============================================
   Flash Messages
   ============================================ */

.flash {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.flash-success {
  background: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid #bbf7d0;
}

.flash-danger {
  background: var(--color-danger-light);
  color: var(--color-danger);
  border: 1px solid #fecaca;
}


/* ============================================
   Forms
   ============================================ */

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  background: var(--color-surface);
  transition: border-color 0.15s;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: var(--space-xs);
}


/* ============================================
   Animations
   ============================================ */

.page-content {
  animation: fadeIn 0.15s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-tertiary) 25%, var(--color-bg-secondary) 50%, var(--color-bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}


/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }

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

  .sidebar-overlay.open {
    display: block;
  }

  .sidebar-toggle {
    display: flex;
  }

  .main-content {
    margin-left: 0;
  }

  .search-input:focus {
    width: 280px;
  }
}

@media (max-width: 767px) {
  .stats-grid-4,
  .stats-grid-5,
  .stats-grid-6 {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-content {
    padding: var(--space-md);
  }
}

@media (max-width: 639px) {
  .stats-grid,
  .stats-grid-3,
  .stats-grid-4,
  .stats-grid-5,
  .stats-grid-6 {
    grid-template-columns: 1fr;
  }
}