/*
 * Plasmid Portal - Custom Design System
 * Aesthetic: Scientific Precision - Clean, laboratory-inspired design
 * Created: 2026-01-04
 */

/* ============================================
   DESIGN TOKENS - CSS VARIABLES
   ============================================ */

:root {
  /* Primary Palette - Scientific Blue Theme */
  --color-primary: #0A3161;
  --color-primary-light: #164887;
  --color-primary-dark: #061F3D;
  --color-primary-subtle: rgba(10, 49, 97, 0.08);

  /* Secondary Palette - Teal Accent */
  --color-secondary: #0D9488;
  --color-secondary-light: #14B8A6;
  --color-secondary-subtle: rgba(13, 148, 136, 0.1);

  /* Neutral Scale */
  --color-neutral-50: #FAFAFA;
  --color-neutral-100: #F5F5F5;
  --color-neutral-200: #E5E5E5;
  --color-neutral-300: #D4D4D4;
  --color-neutral-400: #A3A3A3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;

  /* Semantic Colors */
  --color-success: #059669;
  --color-success-bg: rgba(5, 150, 105, 0.1);
  --color-warning: #D97706;
  --color-warning-bg: rgba(217, 119, 6, 0.1);
  --color-error: #DC2626;
  --color-error-bg: rgba(220, 38, 38, 0.1);
  --color-info: #0284C7;
  --color-info-bg: rgba(2, 132, 199, 0.1);

  /* Status Colors */
  --status-pending: #F59E0B;
  --status-pending-bg: rgba(245, 158, 11, 0.15);
  --status-approved: #06B6D4;
  --status-approved-bg: rgba(6, 182, 212, 0.15);
  --status-in-progress: #3B82F6;
  --status-in-progress-bg: rgba(59, 130, 246, 0.15);
  --status-completed: #10B981;
  --status-completed-bg: rgba(16, 185, 129, 0.15);
  --status-rejected: #EF4444;
  --status-rejected-bg: rgba(239, 68, 68, 0.15);
  --status-expired: #9CA3AF;
  --status-expired-bg: rgba(156, 163, 175, 0.15);

  /* Typography */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;
}

/* ============================================
   BASE STYLES
   ============================================ */

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=JetBrains Mono:wght@400;500&family=Source+Sans+3:wght@300;400;500;600;700&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-neutral-700);
  background: linear-gradient(135deg, #FAFAFA 0%, #F5F5F5 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

h1, .h1 { font-size: var(--text-4xl); letter-spacing: -0.02em; }
h2, .h2 { font-size: var(--text-3xl); letter-spacing: -0.015em; }
h3, .h3 { font-size: var(--text-2xl); letter-spacing: -0.01em; }
h4, .h4 { font-size: var(--text-xl); }
h5, .h5 { font-size: var(--text-lg); }
h6, .h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary-light);
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-neutral-200);
  padding: var(--space-3) 0;
  box-shadow: var(--shadow-sm);
}

.navbar-brand img {
  transition: transform var(--transition-base);
}

.navbar-brand img:hover {
  transform: scale(1.03);
}

.nav-link {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
  padding: var(--space-2) var(--space-4) !important;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary) !important;
  background: var(--color-primary-subtle);
}

.nav-link.text-primary {
  color: var(--color-primary) !important;
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: #FFFFFF;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-neutral-200);
  padding: var(--space-5) var(--space-6);
  font-family: var(--font-display);
  font-weight: 600;
}

.card-body {
  padding: var(--space-6);
}

.card.border-0 {
  border: none;
}

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

/* Auth Card */
.auth-card {
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  background: #FFFFFF;
  transition: all var(--transition-base);
}

.auth-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.12);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  font-family: var(--font-display);
  font-weight: 500;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  border: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  box-shadow: 0 2px 4px rgba(10, 49, 97, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
  box-shadow: 0 4px 8px rgba(10, 49, 97, 0.3);
  transform: translateY(-1px);
}

.btn-outline-primary {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn-outline-primary:hover {
  background: var(--color-primary);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-success {
  background: var(--color-success);
}

.btn-success:hover {
  background: #047857;
}

.btn-outline-success {
  border: 2px solid var(--color-success);
  color: var(--color-success);
  background: transparent;
}

.btn-outline-success:hover {
  background: var(--color-success);
  color: #FFFFFF;
}

.btn-outline-secondary {
  border: 2px solid var(--color-neutral-300);
  color: var(--color-neutral-600);
  background: transparent;
}

.btn-outline-secondary:hover {
  background: var(--color-neutral-100);
  border-color: var(--color-neutral-400);
}

.btn-outline-info {
  border: 2px solid var(--color-info);
  color: var(--color-info);
  background: transparent;
}

.btn-outline-info:hover {
  background: var(--color-info);
  color: #FFFFFF;
}

.btn-outline-warning {
  border: 2px solid var(--color-warning);
  color: var(--color-warning);
  background: transparent;
}

.btn-outline-warning:hover {
  background: var(--color-warning);
  color: #FFFFFF;
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

/* ============================================
   FORMS
   ============================================ */

.form-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--color-neutral-700);
  margin-bottom: var(--space-2);
}

.form-control,
.form-select {
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  background: #FFFFFF;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px var(--color-secondary-subtle);
  outline: none;
}

.form-control::placeholder {
  color: var(--color-neutral-400);
}

.input-group-text {
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-lg);
  color: var(--color-neutral-500);
}

/* Input Groups */
.input-group .form-control:focus,
.input-group .form-control {
  border-radius: var(--radius-lg);
}

.input-group .input-group-text {
  border-right: none;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group .form-control {
  border-left: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* ============================================
   TABLES
   ============================================ */

.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--color-neutral-700);
}

.table thead th {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-neutral-500);
  background: var(--color-neutral-50);
  border-bottom: 2px solid var(--color-neutral-200);
  padding: var(--space-4) var(--space-4);
}

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

.table-hover tbody tr:hover {
  background: var(--color-primary-subtle);
}

.table td {
  padding: var(--space-4);
  vertical-align: middle;
}

/* ============================================
   STATUS BADGES
   ============================================ */

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-pending {
  background: var(--status-pending-bg);
  color: #92400E;
}

.status-approved {
  background: var(--status-approved-bg);
  color: #0E7490;
}

.status-in_progress {
  background: var(--status-in-progress-bg);
  color: #1D4ED8;
}

.status-completed {
  background: var(--status-completed-bg);
  color: #047857;
}

.status-rejected {
  background: var(--status-rejected-bg);
  color: #B91C1C;
}

.status-expired {
  background: var(--status-expired-bg);
  color: #4B5563;
}

/* Bootstrap Badge Overrides */
.badge {
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}

.badge.bg-success { background: var(--color-success) !important; }
.badge.bg-primary { background: var(--color-primary) !important; }
.badge.bg-secondary { background: var(--color-neutral-500) !important; }
.badge.bg-warning { background: var(--color-warning) !important; }
.badge.bg-danger { background: var(--color-error) !important; }
.badge.bg-info { background: var(--color-info) !important; }

/* ============================================
   ALERTS
   ============================================ */

.alert {
  border: none;
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  border-left: 4px solid currentColor;
}

.alert-success {
  background: var(--color-success-bg);
  color: #065F46;
  border-left-color: var(--color-success);
}

.alert-info {
  background: var(--color-info-bg);
  color: #0C4A6E;
  border-left-color: var(--color-info);
}

.alert-warning {
  background: var(--color-warning-bg);
  color: #92400E;
  border-left-color: var(--color-warning);
}

.alert-danger,
.alert-error {
  background: var(--color-error-bg);
  color: #991B1B;
  border-left-color: var(--color-error);
}

/* ============================================
   FOOTER
   ============================================ */

.university-footer {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-neutral-50) 100%);
  border-top: 1px solid var(--color-neutral-200);
  padding: var(--space-8) 0;
  margin-top: var(--space-12);
}

/* ============================================
   BRAND ELEMENTS
   ============================================ */

.brand-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-4xl);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.03em;
}

.brand-tagline {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-neutral-500);
  font-weight: 400;
}

/* ============================================
   LIST GROUPS
   ============================================ */

.list-group-item {
  border: none;
  border-bottom: 1px solid var(--color-neutral-200);
  padding: var(--space-4) 0;
  transition: background var(--transition-fast);
}

.list-group-item:hover {
  background: var(--color-neutral-50);
}

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

/* ============================================
   UTILITIES
   ============================================ */

.auth-link {
  color: var(--color-primary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.auth-link:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

.text-muted {
  color: var(--color-neutral-500) !important;
}

.bg-light {
  background-color: var(--color-neutral-100) !important;
}

/* Icon spacing */
i + span,
i + a {
  margin-left: var(--space-1);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

@keyframes pulse-subtle {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.loading {
  animation: pulse-subtle 1.5s ease-in-out infinite;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  :root {
    --text-4xl: 1.75rem;
    --text-3xl: 1.5rem;
  }

  .card-body {
    padding: var(--space-4);
  }

  .btn {
    padding: var(--space-2) var(--space-4);
  }

  .table-responsive {
    border-radius: var(--radius-lg);
  }
}

/* ============================================
   DARK MODE SUPPORT
   ============================================ */

/* Prevent flash on page load */
body.no-transition {
  transition: none !important;
}

/* Smooth theme transitions */
body,
.card,
.btn,
.form-control,
.form-select,
.navbar {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Dark Mode Theme Variables */
[data-theme="dark"] {
  /* Background Colors */
  --color-bg-primary: #0F172A;
  --color-bg-secondary: #1E293B;
  --color-bg-tertiary: #334155;

  /* Text Colors */
  --color-text-primary: #F1F5F9;
  --color-text-secondary: #94A3B8;
  --color-text-muted: #64748B;

  /* Primary Color - Lighter variant for dark mode visibility */
  --color-primary: #3B82F6;
  --color-primary-light: #60A5FA;
  --color-primary-dark: #2563EB;
  --color-primary-subtle: rgba(59, 130, 246, 0.15);

  /* Secondary Palette - Brighter for dark mode */
  --color-secondary: #22D3EE;
  --color-secondary-light: #67E8F9;
  --color-secondary-subtle: rgba(34, 211, 238, 0.15);

  /* Neutral Scale for Dark Mode */
  --color-neutral-50: #0F172A;
  --color-neutral-100: #1E293B;
  --color-neutral-200: #334155;
  --color-neutral-300: #475569;
  --color-neutral-400: #64748B;
  --color-neutral-500: #94A3B8;
  --color-neutral-600: #CBD5E1;
  --color-neutral-700: #E2E8F0;
  --color-neutral-800: #F1F5F9;
  --color-neutral-900: #F8FAFC;

  /* Card Background */
  --color-card-bg: #1E293B;
  --color-card-border: #334155;

  /* Input Background */
  --color-input-bg: #1E293B;
  --color-input-border: #334155;

  /* Table Colors */
  --color-table-header: #1E293B;
  --color-table-hover: rgba(13, 148, 136, 0.1);
  --color-table-stripe: rgba(255, 255, 255, 0.02);

  /* Navbar Colors */
  --color-navbar-bg: linear-gradient(135deg, #0A1628 0%, #1A2845 100%);
  --color-navbar-accent-glow: 0 0 10px rgba(13, 148, 136, 0.5), 0 0 20px rgba(34, 211, 238, 0.3);

  /* Footer Colors */
  --color-footer-bg: linear-gradient(180deg, #1E293B 0%, #0F172A 100%);
  --color-footer-pattern: radial-gradient(circle at 25% 25%, rgba(34, 211, 238, 0.08) 2px, transparent 2px),
                           radial-gradient(circle at 75% 75%, rgba(13, 148, 136, 0.08) 2px, transparent 2px);

  /* Enhanced Status Colors for Dark Mode */
  --status-pending: #F59E0B;
  --status-pending-bg: rgba(245, 158, 11, 0.2);
  --status-approved: #22D3EE;
  --status-approved-bg: rgba(34, 211, 238, 0.2);
  --status-in-progress: #60A5FA;
  --status-in-progress-bg: rgba(96, 165, 250, 0.2);
  --status-completed: #34D399;
  --status-completed-bg: rgba(52, 211, 153, 0.2);
  --status-rejected: #F87171;
  --status-rejected-bg: rgba(248, 113, 113, 0.2);
  --status-expired: #6B7280;
  --status-expired-bg: rgba(107, 114, 128, 0.2);

  /* Semantic Colors for Dark Mode */
  --color-success-bg: rgba(52, 211, 153, 0.15);
  --color-warning-bg: rgba(251, 191, 36, 0.15);
  --color-error-bg: rgba(248, 113, 113, 0.15);
  --color-info-bg: rgba(96, 165, 250, 0.15);
}

/* Dark Mode Body */
[data-theme="dark"] body {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  color: var(--color-text-primary);
}

/* Dark Mode Cards */
[data-theme="dark"] .card {
  background: var(--color-card-bg);
  border-color: var(--color-card-border);
}

[data-theme="dark"] .card-header {
  background: var(--color-card-bg);
  border-color: var(--color-card-border);
}

/* Dark Mode Auth Card */
[data-theme="dark"] .auth-card {
  background: var(--color-card-bg);
  border-color: var(--color-card-border);
}

/* Dark Mode Forms */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background: var(--color-input-bg);
  border-color: var(--color-input-border);
  color: var(--color-text-primary);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
  background: var(--color-input-bg);
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.2);
}

[data-theme="dark"] .form-control::placeholder {
  color: var(--color-text-muted);
}

[data-theme="dark"] .input-group-text {
  background: var(--color-bg-tertiary);
  border-color: var(--color-input-border);
  color: var(--color-text-secondary);
}

/* Dark Mode Tables */
[data-theme="dark"] .table thead th {
  background: var(--color-table-header);
  color: var(--color-text-secondary);
  border-color: var(--color-card-border);
}

[data-theme="dark"] .table-hover tbody tr:hover {
  background: var(--color-table-hover);
}

[data-theme="dark"] .table-striped tbody tr:nth-of-type(odd) {
  background: var(--color-table-stripe);
}

/* Dark Mode Typography */
[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3,
[data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6,
[data-theme="dark"] .h1, [data-theme="dark"] .h2, [data-theme="dark"] .h3,
[data-theme="dark"] .h4, [data-theme="dark"] .h5, [data-theme="dark"] .h6 {
  color: var(--color-text-primary);
}

/* Dark Mode Alerts */
[data-theme="dark"] .alert-success {
  background: var(--color-success-bg);
  color: #6EE7B7;
  border-left-color: #34D399;
}

[data-theme="dark"] .alert-info {
  background: var(--color-info-bg);
  color: #7DD3FC;
  border-left-color: #38BDF8;
}

[data-theme="dark"] .alert-warning {
  background: var(--color-warning-bg);
  color: #FCD34D;
  border-left-color: #FBBF24;
}

[data-theme="dark"] .alert-danger,
[data-theme="dark"] .alert-error {
  background: var(--color-error-bg);
  color: #FCA5A5;
  border-left-color: #F87171;
}

/* Dark Mode alert-light - Used for Sample Status */
[data-theme="dark"] .alert-light {
  background: var(--color-card-bg) !important;
  color: var(--color-text-primary) !important;
  border: 1px solid var(--color-card-border) !important;
}

[data-theme="dark"] .alert-light .text-muted {
  color: var(--color-text-secondary) !important;
}

[data-theme="dark"] .alert-light small {
  color: var(--color-text-secondary);
}

[data-theme="dark"] .alert-light strong {
  color: var(--color-text-primary);
}

/* Dark Mode Utilities */
[data-theme="dark"] .text-muted {
  color: var(--color-text-muted) !important;
}

[data-theme="dark"] .bg-light {
  background-color: var(--color-bg-tertiary) !important;
}

[data-theme="dark"] .border-secondary {
  border-color: var(--color-card-border) !important;
}

/* Dark Mode Modals */
[data-theme="dark"] .modal-content {
  background: var(--color-card-bg);
  border-color: var(--color-card-border);
  color: var(--color-text-primary);
}

[data-theme="dark"] .modal-header {
  background: var(--color-bg-secondary);
  border-color: var(--color-card-border);
  color: var(--color-text-primary);
}

[data-theme="dark"] .modal-title {
  color: var(--color-text-primary);
}

[data-theme="dark"] .modal-body {
  background: var(--color-card-bg);
  color: var(--color-text-primary);
}

[data-theme="dark"] .modal-footer {
  background: var(--color-bg-secondary);
  border-color: var(--color-card-border);
  color: var(--color-text-primary);
}

[data-theme="dark"] .form-text {
  color: var(--color-text-muted) !important;
}

[data-theme="dark"] .form-label {
  color: var(--color-text-primary);
}

[data-theme="dark"] .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}

/* ============================================
   GLASSMORPHIC NAVBAR
   ============================================ */

/* Main Navbar Container */
.navbar-glass {
  background: var(--color-navbar-bg, linear-gradient(135deg, rgba(10, 49, 97, 0.95) 0%, rgba(22, 72, 135, 0.92) 100%));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: none;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.1);
  padding: var(--space-3) 0;
}

/* Accent Bar at Top */
.navbar-accent-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--color-secondary) 0%,
    #22D3EE 50%,
    var(--color-primary) 100%);
  z-index: 10;
}

/* Accent Bar Glow in Dark Mode */
[data-theme="dark"] .navbar-accent-bar {
  box-shadow: 0 0 10px var(--color-secondary),
              0 0 20px rgba(34, 211, 238, 0.5);
}

/* Subtle Glow Effect */
.navbar-glow {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(13, 148, 136, 0.3) 50%,
    transparent 100%);
}

/* Navbar Brand with Glow */
.navbar-glass .navbar-brand img {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  transition: all var(--transition-base);
}

[data-theme="dark"] .navbar-glass .navbar-brand img {
  filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.3));
}

.navbar-glass .navbar-brand img:hover {
  transform: scale(1.02);
}

/* Nav Links with Animated Underlines */
.navbar-glass .nav-link {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.9);
  padding: var(--space-3) var(--space-4) !important;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
}

.navbar-glass .nav-link:hover {
  color: #FFFFFF !important;
  background: rgba(255, 255, 255, 0.1);
}

.navbar-glass .nav-link.text-primary {
  color: #FFFFFF !important;
}

/* Animated Link Indicator */
.nav-link-animated {
  position: relative;
}

.nav-link-indicator {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #22D3EE, var(--color-secondary));
  transform: translateX(-50%);
  transition: width var(--transition-base) ease-out;
  border-radius: var(--radius-full) var(--radius-full) 0 0;
}

[data-theme="dark"] .nav-link-indicator {
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
}

.nav-link-animated:hover .nav-link-indicator {
  width: 80%;
}

/* Logout Link Button */
.nav-link-logout {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.9) !important;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.nav-link-logout:hover {
  color: #FFFFFF !important;
  background: rgba(255, 255, 255, 0.1);
}

/* Mobile Navbar Toggler */
.navbar-glass .navbar-toggler {
  border-color: rgba(255, 255, 255, 0.2);
}

.navbar-glass .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

[data-theme="dark"] .navbar-glass .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2322D3EE' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */

.btn-theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  padding: 0;
}

.btn-theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 0 15px rgba(13, 148, 136, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-theme-toggle:active {
  transform: scale(1.05);
}

[data-theme="dark"] .btn-theme-toggle {
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
  border-color: rgba(34, 211, 238, 0.4);
  background: rgba(34, 211, 238, 0.1);
}

[data-theme="dark"] .btn-theme-toggle:hover {
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
}

/* Theme Toggle Icons */
.theme-icon-sun,
.theme-icon-moon {
  position: absolute;
  font-size: 1.25rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-icon-sun {
  color: #FCD34D;
}

.theme-icon-moon {
  color: #22D3EE;
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
  transform: rotate(180deg) scale(0);
}

[data-theme="light"] .theme-icon-moon {
  opacity: 0;
  transform: rotate(-180deg) scale(0);
}

/* ============================================
   LANGUAGE TOGGLE BUTTON
   ============================================ */

.btn-language-toggle {
  width: 50px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: white;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  overflow: hidden;
  cursor: pointer;
  padding: 0;
}

.btn-language-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 0 15px rgba(13, 148, 136, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.2);
}

.btn-language-toggle:active {
  transform: scale(1.05);
}

[data-theme="dark"] .btn-language-toggle {
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
  border-color: rgba(34, 211, 238, 0.4);
  background: rgba(34, 211, 238, 0.1);
}

[data-theme="dark"] .btn-language-toggle:hover {
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
}

#language-form {
  margin: 0;
  margin-left: 10px;
}

#current-lang {
  position: relative;
  display: inline-block;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-language-toggle:hover #current-lang {
  transform: scale(1.1);
}

/* ============================================
   FOOTER REDESIGN
   ============================================ */

.university-footer {
  background:
    var(--color-footer-pattern, radial-gradient(circle, #CBD5E1 1px, transparent 1px)),
    var(--color-footer-bg, linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%));
  background-size: 40px 40px, 100% 100%;
  border-top: none;
  padding: var(--space-3) 0;
  margin-top: var(--space-12);
  position: relative;
  overflow: hidden;
}

/* Footer Accent Border */
.university-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--color-secondary) 0%,
    #22D3EE 50%,
    var(--color-primary) 100%);
  z-index: 1;
}

/* Dark Mode Footer Pattern */
[data-theme="dark"] .university-footer::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 25% 25%, rgba(34, 211, 238, 0.03) 2px, transparent 2px),
              radial-gradient(circle at 75% 75%, rgba(13, 148, 136, 0.03) 2px, transparent 2px);
  background-size: 40px 40px, 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* Footer Content Container */
.university-footer .container {
  position: relative;
  z-index: 1;
}

/* Footer Logo */
.footer-logo {
  height: 55px;
  margin-top: -5px;
  margin-bottom: -5px;
  margin-right: var(--space-3);
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  transition: all var(--transition-base);
}

.footer-logo:hover {
  transform: scale(1.03);
}

[data-theme="dark"] .footer-logo {
  filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.2));
}

/* Footer Typography */
.footer-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-primary);
  margin-bottom: 0;
}

.footer-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.footer-copyright {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.footer-link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* Dark Mode Footer Typography */
[data-theme="dark"] .footer-title {
  color: #22D3EE;
}

[data-theme="dark"] .footer-subtitle {
  color: var(--color-text-secondary);
}

[data-theme="dark"] .footer-copyright {
  color: var(--color-text-muted);
}

[data-theme="dark"] .footer-link {
  color: var(--color-text-muted);
}

[data-theme="dark"] .footer-link:hover {
  color: #22D3EE;
}

/* ============================================
   DARK MODE NAVBAR FALLBACK
   ============================================ */

/* For browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(12px)) {
  .navbar-glass {
    background: linear-gradient(135deg,
      rgba(10, 49, 97, 0.98) 0%,
      rgba(22, 72, 135, 0.95) 100%);
  }

  [data-theme="dark"] .navbar-glass {
    background: linear-gradient(135deg, #0A1628 0%, #1A2845 100%);
  }
}

/* ============================================
   ADDITIONAL DARK MODE ENHANCEMENTS
   ============================================ */

/* Dark Mode Status Badges */
[data-theme="dark"] .status-pending {
  background: var(--status-pending-bg);
  color: #FBBF24;
}

[data-theme="dark"] .status-approved {
  background: var(--status-approved-bg);
  color: #22D3EE;
}

[data-theme="dark"] .status-in_progress {
  background: var(--status-in-progress-bg);
  color: #60A5FA;
}

[data-theme="dark"] .status-completed {
  background: var(--status-completed-bg);
  color: #34D399;
}

[data-theme="dark"] .status-rejected {
  background: var(--status-rejected-bg);
  color: #F87171;
}

[data-theme="dark"] .status-expired {
  background: var(--status-expired-bg);
  color: #9CA3AF;
}

/* Dark Mode List Groups */
[data-theme="dark"] .list-group-item {
  border-color: var(--color-card-border);
}

[data-theme="dark"] .list-group-item:hover {
  background: var(--color-bg-tertiary);
}

/* ============================================
   DARK MODE CARD HEADERS & LIST ITEMS
   ============================================ */

/* Card Headers - Dark mode friendly gradient */
[data-theme="dark"] .card-header {
  background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-card-bg) 100%) !important;
  border-color: var(--color-card-border) !important;
  color: var(--color-text-primary) !important;
}

/* List Group Items - Dark mode */
[data-theme="dark"] .list-group-item {
  background: var(--color-card-bg) !important;
  border-color: var(--color-card-border) !important;
  color: var(--color-text-primary);
}

[data-theme="dark"] .list-group-item:hover {
  background: var(--color-bg-tertiary) !important;
}

/* ============================================
   DARK MODE SAMPLE CARDS & STATUS
   ============================================ */

/* Sample Cards */
[data-theme="dark"] .sample-card {
  background: var(--color-card-bg) !important;
  border-color: var(--color-card-border) !important;
  color: var(--color-text-primary);
}

[data-theme="dark"] .sample-card .sample-name {
  color: var(--color-text-primary) !important;
}

[data-theme="dark"] .sample-card .sample-concentration {
  color: var(--color-text-secondary) !important;
}

/* Sample Status Badge */
[data-theme="dark"] .badge-custom {
  background: var(--color-bg-tertiary) !important;
  color: var(--color-text-secondary) !important;
}

/* ============================================
   DARK MODE FILTER CARDS
   ============================================ */

/* Filter Card - Remove white gradient */
[data-theme="dark"] .filter-card {
  background: var(--color-card-bg) !important;
  border: 1px solid var(--color-card-border) !important;
  color: var(--color-text-primary);
}

/* ============================================
   DARK MODE BUTTONS FIX
   ============================================ */

/* Outline buttons in dark mode - use lighter colors */
[data-theme="dark"] .btn-outline-primary {
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
}

[data-theme="dark"] .btn-outline-primary:hover {
  background: var(--color-primary) !important;
  color: #FFFFFF !important;
}

/* Auth links in dark mode */
[data-theme="dark"] .auth-link {
  color: var(--color-primary) !important;
}

[data-theme="dark"] .auth-link:hover {
  color: var(--color-primary-light) !important;
}

/* Text-primary in dark mode */
[data-theme="dark"] .text-primary {
  color: var(--color-primary) !important;
}

/* Primary button gradient enhancement in dark mode */
[data-theme="dark"] .btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%) !important;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

[data-theme="dark"] .btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%) !important;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}