/**
 * FOUNDATION.CSS - Core styles for DiscoveringDaVinci.com
 * =======================================================
 * Inspired by itsjustlife.cloud uni-menu aesthetic
 * Renaissance-meets-minimalism design approach
 */

/* CSS Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* ═══ DARK THEME (default — Renaissance aesthetic) ═══ */
  color-scheme: dark;
  --color-background: #0b0d11;
  --color-surface: #11151d;
  --color-surface-elevated: #171c25;
  --color-border: #313847;
  --color-border-subtle: #232936;

  /* Text colors */
  --color-text-primary: #f5efe3;
  --color-text-secondary: #d4ccbe;
  --color-text-tertiary: #9d9484;
  --color-text-disabled: #6c6558;

  /* Accent colors — warm gold Renaissance tones */
  --color-accent-primary: #cda349;
  --color-accent-secondary: #e3c06c;
  --color-accent-tertiary: #8f6a2d;

  /* Interactive states */
  --color-hover: #1a2029;
  --color-active: #242c37;
  --color-focus: #e3c06c;

  /* Typography */
  --font-display: 'Cinzel', serif;
  --font-body: 'Crimson Text', serif;
  --font-ui: 'Inter', sans-serif;
  --font-code: 'Fira Code', monospace;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --content-max-width: 1200px;
  --menu-width: 260px;
  --border-radius: 10px;

  /* Animations */
  --transition-fast: 150ms ease-out;
  --transition-medium: 250ms ease-out;
  --transition-slow: 350ms ease-out;

  /* Z-index scale */
  --z-menu: 100;
  --z-overlay: 90;
  --z-modal: 110;
}

/* ═══ LIGHT THEME (opt-in) ═══ */
[data-theme="light"] {
  color-scheme: light;
  --color-background: #f6f1e7;
  --color-surface: #efe8da;
  --color-surface-elevated: #fffbf3;
  --color-border: #d8ccb6;
  --color-border-subtle: #e7dcc8;

  --color-text-primary: #1f1911;
  --color-text-secondary: #524739;
  --color-text-tertiary: #877863;
  --color-text-disabled: #ada08d;

  --color-accent-primary: #8b6914;
  --color-accent-secondary: #5f4810;
  --color-accent-tertiary: #ab8851;

  --color-hover: #ece2d0;
  --color-active: #e2d4bf;
  --color-focus: #8b6914;
}

/* ═══ DARK THEME explicit (same as :root — kept for compatibility) ═══ */
[data-theme="dark"] {
  color-scheme: dark;
  --color-background: #0b0d11;
  --color-surface: #11151d;
  --color-surface-elevated: #171c25;
  --color-border: #313847;
  --color-border-subtle: #232936;

  --color-text-primary: #f5efe3;
  --color-text-secondary: #d4ccbe;
  --color-text-tertiary: #9d9484;
  --color-text-disabled: #6c6558;

  --color-accent-primary: #cda349;
  --color-accent-secondary: #e3c06c;
  --color-accent-tertiary: #8f6a2d;

  --color-hover: #1a2029;
  --color-active: #242c37;
  --color-focus: #e3c06c;
}

/* Base HTML & Body */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

em {
  font-style: italic;
  color: var(--color-accent-primary);
}

strong {
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Main Layout */
.main-content {
  margin-left: var(--menu-width);
  min-height: 100vh;
  transition: margin-left var(--transition-medium);
}

/* Container */
.container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-xl);
}

/* Sections */
.section {
  display: none;
  min-height: 100vh;
  padding: var(--space-2xl) 0;
}

.section.active {
  display: block;
}

/* Hero Section */
.hero-section {
  display: flex;
  align-items: center;
  background: 
    linear-gradient(135deg, rgba(212, 175, 55, 0.05) 0%, rgba(0, 0, 0, 0.9) 50%),
    radial-gradient(circle at 20% 80%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
    var(--color-background);
}

.hero-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.hero-content {
  max-width: 600px;
}

.hero-title {
  margin-bottom: var(--space-lg);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
}

.title-main {
  display: block;
  color: var(--color-text-primary);
}

.title-sub {
  display: block;
  color: var(--color-accent-primary);
  font-size: 0.8em;
  margin-top: var(--space-xs);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  font-family: var(--font-ui);
  font-weight: 300;
}

.hero-description {
  margin-bottom: var(--space-xl);
}

.hero-description p {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.hero-actions {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* Buttons */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: var(--border-radius);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all var(--transition-medium);
  text-decoration: none;
}

.cta-button.primary {
  background-color: var(--color-accent-primary);
  color: var(--color-background);
}

.cta-button.primary:hover {
  background-color: var(--color-accent-secondary);
  transform: translateY(-1px);
}

.cta-button.secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.cta-button.secondary:hover {
  background-color: var(--color-hover);
  border-color: var(--color-accent-primary);
}

/* Hero Feature Card */
.hero-feature {
  align-self: flex-start;
}

.feature-card {
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  transition: all var(--transition-medium);
}

.feature-card:hover {
  border-color: var(--color-accent-primary);
  transform: translateY(-2px);
}

.feature-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.feature-icon {
  font-size: 1.5rem;
  color: var(--color-accent-primary);
}

.feature-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.feature-content p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.feature-action {
  background: none;
  border: none;
  color: var(--color-accent-primary);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.feature-action:hover {
  color: var(--color-accent-secondary);
}

/* Content Sections */
.content-section .container {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-md);
  color: var(--color-accent-primary);
}

.section-subtitle {
  text-align: center;
  font-family: var(--font-ui);
  font-size: 1.125rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3xl);
}

.content-placeholder {
  background-color: var(--color-surface);
  border: 2px dashed var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-3xl);
  text-align: center;
  color: var(--color-text-tertiary);
  font-family: var(--font-ui);
  font-size: 1.125rem;
}

/* Content Stats Styling */
.content-stats {
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
  text-align: left;
}

.content-stats h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-accent-primary);
  margin-bottom: var(--space-lg);
  text-align: center;
}

.stats-list {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-xl);
}

.stats-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  font-family: var(--font-ui);
  color: var(--color-text-secondary);
}

.stats-list li:last-child {
  border-bottom: none;
}

.stats-list strong {
  color: var(--color-accent-primary);
  font-weight: 600;
  font-family: var(--font-display);
}

.content-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background-color: var(--color-accent-primary);
  color: var(--color-background);
  text-decoration: none;
  border-radius: var(--border-radius);
  font-family: var(--font-ui);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.875rem;
  transition: all var(--transition-medium);
  justify-content: center;
}

.content-link:hover {
  background-color: var(--color-accent-secondary);
  transform: translateY(-1px);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .main-content {
    margin-left: 0;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-2xl);
  }
  
  .hero-title {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: var(--space-lg);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .cta-button {
    padding: var(--space-md) var(--space-lg);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-button {
    width: 100%;
    justify-content: center;
    max-width: 280px;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus styles */
button:focus,
a:focus {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Selection styles */
::selection {
  background-color: var(--color-accent-primary);
  color: var(--color-background);
}

/* Featured Highlight Card */
.feature-card.featured-highlight {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(139, 90, 43, 0.1) 100%);
  border: 1px solid var(--color-accent-primary);
  position: relative;
  margin-top: var(--space-lg);
}

.feature-card.featured-highlight::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
}

.feature-card.featured-highlight .feature-header {
  border-bottom-color: rgba(212, 175, 55, 0.3);
}

.feature-badge {
  font-size: 0.65rem;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: var(--color-background);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-left: auto;
  animation: pulse-badge 2s infinite;
}

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

.feature-card.featured-highlight .feature-action {
  color: var(--color-accent-primary);
  text-decoration: none;
  font-weight: 600;
}

.feature-card.featured-highlight .feature-action:hover {
  color: var(--color-text-primary);
}