/* CSS Secrets - Common Styles */

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-header: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-link: #0d6efd;
  --text-link-hover: #0a58ca;
  --text-chapter: #0d6efd;
  --border-color: #dee2e6;
  --shadow-color: rgba(0, 0, 0, 0.08);
  --chapter-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --row-highlight: rgba(13, 110, 253, 0.04);
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-header: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-link: #0d6efd;
  --text-link-hover: #0a58ca;
  --text-chapter: #0d6efd;
  --border-color: #dee2e6;
  --shadow-color: rgba(0, 0, 0, 0.08);
  --chapter-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --row-highlight: rgba(13, 110, 253, 0.04);
}

[data-theme="dark"] {
  --bg-primary: #212529;
  --bg-secondary: #2b3035;
  --bg-header: #343a40;
  --text-primary: #f8f9fa;
  --text-secondary: #adb5bd;
  --text-link: #6ea8fe;
  --text-link-hover: #9ec5fe;
  --text-chapter: #6ea8fe;
  --border-color: #495057;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --chapter-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --row-highlight: rgba(110, 168, 254, 0.08);
}

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --bg-primary: #212529;
    --bg-secondary: #2b3035;
    --bg-header: #343a40;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-link: #6ea8fe;
    --text-link-hover: #9ec5fe;
    --text-chapter: #6ea8fe;
    --border-color: #495057;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --chapter-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --row-highlight: rgba(110, 168, 254, 0.08);
  }
}

* {
  box-sizing: border-box;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: background 0.3s ease, color 0.3s ease;
  min-height: 100vh;
}

/* Navbar */
.navbar {
  background: rgba(248, 249, 250, 0.8) !important;
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
}

[data-theme="dark"] .navbar,
[data-theme="auto"] .navbar {
  background: rgba(43, 48, 53, 0.8) !important;
}

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] .navbar {
    background: rgba(43, 48, 53, 0.8) !important;
  }
}

@media (prefers-color-scheme: light) {
  [data-theme="auto"] .navbar {
    background: rgba(248, 249, 250, 0.8) !important;
  }
}

.navbar-brand {
  color: var(--text-primary) !important;
  font-weight: 600;
  transition: transform 0.2s ease;
}

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

.navbar-brand .bi {
  transition: transform 0.3s ease;
}

.navbar-brand:hover .bi {
  transform: rotate(-10deg);
}

/* Theme Buttons */
.btn-group .btn {
  background: var(--bg-secondary);
  border-color: var(--border-color);
  color: var(--text-secondary);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn-group .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn-group .btn:hover::before {
  left: 100%;
}

.btn-group .btn:hover {
  background: var(--bg-header);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-group .btn.active {
  background: var(--text-link) !important;
  border-color: var(--text-link) !important;
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(13, 110, 253, 0.3);
}

/* Card */
.card {
  background: var(--bg-primary);
  border-color: var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
  box-shadow: 0 8px 30px var(--shadow-color);
}

/* Icons */
.bi {
  font-size: 1rem;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: fadeInUp 0.5s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Mobile */
@media (max-width: 576px) {
  .navbar .container {
    flex-wrap: nowrap;
  }

  .navbar-brand {
    font-size: 0.95rem;
  }

  .btn-group .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }

  .btn-group .btn .bi {
    margin-right: 0 !important;
  }

  .btn-group .btn span {
    display: none;
  }
}

/* Demo Page Specific */
.demo-container {
  padding: 2rem;
}

.demo-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.demo-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.demo-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.code-block {
  background: var(--bg-header);
  border-radius: 6px;
  padding: 1rem;
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-size: 0.875rem;
  overflow-x: auto;
}

/* Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: var(--text-link-hover);
}

.back-link .bi {
  transition: transform 0.2s ease;
}

.back-link:hover .bi {
  transform: translateX(-3px);
}