/* AI Guide Site Styles - Standardized */
:root {
  /* Standardized Variables */
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --secondary-hover: #2980b9;
  --accent-color: #e74c3c;
  --success-color: #2ecc71;
  --warning-color: #f1c40f;

  /* UI Colors */
  --background-color: #f8f9fa;
  --bg-card: #ffffff;
  --text-color: #333;
  --text-light: #666;
  --border-color: #e9ecef;
  --bg-header: rgba(255, 255, 255, 0.95);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.025);
  --card-shadow: var(--shadow-sm);
  --card-hover-shadow: var(--shadow-lg);

  /* Layout & Spacing */
  --container-width: 1200px;
  --header-height: 70px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition-speed: 0.2s;
}

/* Dark Mode Variables */
@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #f9fafb;
    --text-light: #d1d5db;
    --background-color: #111827;
    --bg-card: #1f2937;
    --bg-header: rgba(17, 24, 39, 0.95);
    --border-color: #374151;
    --secondary-color: #3b82f6;
    --secondary-hover: #60a5fa;
    --primary-color: #e2e8f0; /* Light text for dark mode primary headers if needed */
  }
}

:root.dark {
  --text-color: #f9fafb;
  --text-light: #d1d5db;
  --background-color: #111827;
  --bg-card: #1f2937;
  --bg-header: rgba(17, 24, 39, 0.95);
  --border-color: #374151;
  --secondary-color: #3b82f6;
  --secondary-hover: #60a5fa;
  --primary-color: #e2e8f0;
}

/* Base Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--secondary-color); text-decoration: none; transition: color var(--transition-speed); }
a:hover { color: var(--secondary-hover); text-decoration: underline; }

/* Navigation */
nav {
    background-color: var(--bg-card);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: var(--bg-header);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none !important;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links li.divider {
    color: var(--border-color);
    font-size: 1.2rem;
    user-select: none;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
}

.nav-links a.active {
    color: var(--secondary-color);
}

:root.dark .logo { color: var(--text-color); }

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color var(--transition-speed) ease;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

.lang-switcher {
    margin-left: 1rem;
}

.lang-switcher select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-color);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color var(--transition-speed) ease;
}

.lang-switcher select:hover {
    border-color: var(--secondary-color);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.mobile-menu span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: var(--transition-speed);
}

/* Header Section (Hero) */
.hero-header {
    background: linear-gradient(135deg, #2c3e50 0%, #2980b9 100%);
    color: white;
    text-align: center;
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
    margin-bottom: 2rem;
}

.hero-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjAiIGhlaWdodD0iMjAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGNpcmNsZSBjeD0iMSIgY3k9IjEiIHI9IjEiIGZpbGw9InJnYmEoMjU1LDI1NSwyNTUsMC4wNSkiLz48L3N2Zz4=');
    mask-image: linear-gradient(to bottom, black, transparent);
}

.hero-header h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    position: relative;
    color: white;
}

.hero-header p {
    font-size: 1.4rem;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
    font-weight: 300;
    position: relative;
    color: white;
}

/* Legacy Layout Support */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  min-height: calc(100vh - 160px);
}

.old-header { display: none; }

/* Hero Section (Legacy/Internal) */
.hero {
  background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(41, 128, 185, 0.1));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  margin-bottom: 32px;
}
.hero h1 { margin: 0 0 16px; color: var(--text-color); font-size: 2.25rem; font-weight: 800; letter-spacing: -0.02em; }
.hero p { margin: 0 auto; max-width: 700px; color: var(--text-light); font-size: 1.1rem; }

/* Grid & Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--secondary-color);
}

.card h2 { margin: 0 0 12px; color: var(--text-color); font-size: 1.25rem; font-weight: 700; }
.card p { margin: 0 0 20px; color: var(--text-light); flex-grow: 1; font-size: 0.95rem; }

.actions { margin-top: auto; }
.actions a {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--secondary-color);
}
.actions a:hover {
  color: var(--secondary-hover);
}

/* Content Sections */
.section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}
.section h2 { margin-top: 0; color: var(--text-color); border-bottom: 2px solid var(--border-color); padding-bottom: 12px; margin-bottom: 20px; }
.section h3 { margin: 24px 0 12px; color: var(--text-color); font-size: 1.25rem; }
.section p, .section li { color: var(--text-light); margin-bottom: 12px; }

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  background: rgba(52, 152, 219, 0.1);
  color: var(--secondary-color);
  border: 1px solid rgba(52, 152, 219, 0.2);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-right: 8px;
  margin-bottom: 8px;
}

/* Footer - Home Style */
footer {
    background-color: #2c3e50; /* Keep dark footer like home */
    color: white;
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}
:root.dark footer { background-color: var(--bg-card); border-top: 1px solid var(--border-color); }

.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

.footer-section ul li a:hover {
    color: white;
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Utilities */
pre {
  background: #1e293b;
  color: #e2e8f0;
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
}

.table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.table th, .table td { border: 1px solid var(--border-color); padding: 12px; text-align: left; }
.table th { background: rgba(0,0,0,0.03); color: var(--text-color); font-weight: 600; }
:root.dark .table th { background: rgba(255,255,255,0.05); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-size: 0.95rem;
}
.btn-primary {
  background: var(--secondary-color);
  color: white;
  box-shadow: 0 2px 4px rgba(52, 152, 219, 0.3);
}
.btn-primary:hover {
  background: var(--secondary-hover);
  box-shadow: 0 4px 6px rgba(52, 152, 219, 0.4);
  color: white; text-decoration: none;
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--secondary-color);
  color: var(--secondary-color);
}
.btn-outline:hover {
  background: var(--secondary-color);
  color: white; text-decoration: none;
}

/* Prompt Page Specifics */
.prompt-example {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--secondary-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 16px 0;
}
.prompt-text {
  background: rgba(0,0,0,0.03);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-family: monospace;
  margin: 8px 0;
  color: var(--text-color);
}
:root.dark .prompt-text { background: rgba(255,255,255,0.05); }

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        gap: 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: 1rem;
    }

    .mobile-menu {
        display: flex;
    }

    .hero-header h1 {
        font-size: 2.5rem;
    }

    .hero-header p {
        font-size: 1.1rem;
        padding: 0 1rem;
    }
    
    .grid { grid-template-columns: 1fr; }
}

/* Dark Mode Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-light);
  font-size: 1.2rem;
  margin-left: 12px;
  padding: 8px;
  border-radius: 50%;
  transition: background 0.2s;
}
.theme-toggle:hover { background: rgba(0,0,0,0.1); color: var(--text-color); }
:root.dark .theme-toggle:hover { background: rgba(255,255,255,0.1); }