/**
 * LA CHEVELURE D'OR - Styles
 * Architecture: BEM-like naming, CSS Custom Properties
 * Theme: Western Mystique / Golden Hour
 */

/* ========================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ======================================== */
:root {
  /* Primary Palette - Gold & Bronze */
  --color-gold-bright: #ffd700;
  --color-gold-primary: #daa520;
  --color-gold-dark: #b8860b;
  --color-bronze: #c19a6b;
  --color-sand: #f5deb3;
  --color-sand-light: #fff8dc;
  --color-khaki: #f0e68c;
  
  /* Neutral Palette */
  --color-slate-dark: #1a252f;
  --color-slate: #2c3e50;
  --color-slate-light: #34495e;
  --color-white: #ffffff;
  --color-off-white: #f9f9f9;
  --color-gray: #555555;
  
  /* Semantic Colors */
  --color-text-primary: var(--color-slate);
  --color-text-secondary: var(--color-gray);
  --color-text-light: var(--color-white);
  --color-text-gold: var(--color-gold-bright);
  
  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Crimson Text', Georgia, serif;
  --font-accent: 'Cinzel', serif;
  
  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease-out;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.25);
  --shadow-gold: 0 4px 20px rgba(218, 165, 32, 0.3);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 50px;
  
  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 500;
  --z-modal: 1000;
  --z-tooltip: 2000;
}

/* ========================================
   RESET & BASE
   ======================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-primary);
  background: linear-gradient(135deg, var(--color-sand) 0%, var(--color-gold-primary) 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: 0.05em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--color-bronze);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 3px solid var(--color-gold-primary);
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100px;
  height: 3px;
  background: var(--color-gold-bright);
}

h3 {
  font-size: 1.5rem;
  color: var(--color-bronze);
  margin-bottom: var(--space-sm);
}

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

strong {
  color: var(--color-gold-dark);
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll Animation Classes */
.fade-init {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-init.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays for children */
.stagger-children > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.4s; }

/* Translation fade */
[data-i18n] {
  transition: opacity var(--transition-fast);
}

/* ========================================
   LANGUAGE SWITCHER
   ======================================== */
.lang-switcher {
  position: fixed;
  top: var(--space-md);
  right: var(--space-md);
  z-index: var(--z-tooltip);
  display: flex;
  gap: var(--space-xs);
  background: rgba(26, 37, 47, 0.95);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
}

.lang-btn {
  background: transparent;
  border: 2px solid var(--color-gold-bright);
  color: var(--color-gold-bright);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  transition: all var(--transition-base);
}

.lang-btn:hover {
  background: var(--color-gold-bright);
  color: var(--color-slate);
  transform: scale(1.05);
}

.lang-btn:focus-visible {
  outline: 2px solid var(--color-gold-bright);
  outline-offset: 2px;
}

.lang-btn.active {
  background: var(--color-gold-bright);
  color: var(--color-slate);
}

/* ========================================
   HEADER
   ======================================== */
.header {
  background: 
    linear-gradient(to bottom, rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.5)),
    linear-gradient(135deg, var(--color-slate-dark) 0%, var(--color-bronze) 100%);
  color: var(--color-white);
  text-align: center;
  padding: 8rem var(--space-md) 5rem;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 30% 20%, rgba(255, 215, 0, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(218, 165, 32, 0.1) 0%, transparent 40%);
  pointer-events: none;
}

.header__title {
  color: var(--color-gold-bright);
  text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.7);
  margin-bottom: var(--space-xs);
  position: relative;
  animation: fadeInUp 1s ease-out;
}

.header__tome {
  font-family: var(--font-accent);
  font-size: 1.3rem;
  color: var(--color-khaki);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 1s ease-out 0.2s both;
}

.header__subtitle {
  font-size: 1.3rem;
  font-style: italic;
  color: var(--color-khaki);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  animation: fadeInUp 1s ease-out 0.4s both;
}

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  background: rgba(26, 37, 47, 0.98);
  padding: var(--space-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

.nav__list {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.nav__link {
  color: var(--color-gold-bright);
  text-decoration: none;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  font-weight: 600;
  font-size: 0.95rem;
}

.nav__link:hover {
  background: var(--color-gold-bright);
  color: var(--color-slate);
  transform: translateY(-2px);
}

.nav__link:focus-visible {
  outline: 2px solid var(--color-gold-bright);
  outline-offset: 2px;
}

/* ========================================
   MAIN CONTAINER
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  background: var(--color-white);
  margin: var(--space-xl) 0;
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.section:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.section__icon {
  display: inline-block;
  font-size: 1.5rem;
  margin-right: var(--space-xs);
}

/* ========================================
   HIGHLIGHT BOX
   ======================================== */
.highlight-box {
  background: linear-gradient(135deg, var(--color-sand-light) 0%, var(--color-khaki) 100%);
  padding: var(--space-lg);
  border-left: 5px solid var(--color-gold-primary);
  margin: var(--space-lg) 0;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.highlight-box__title {
  color: var(--color-bronze);
  margin-bottom: var(--space-sm);
  font-size: 1.3rem;
}

/* ========================================
   QUOTE
   ======================================== */
.quote {
  font-style: italic;
  font-size: 1.15rem;
  color: var(--color-gray);
  padding: var(--space-md);
  border-left: 4px solid var(--color-bronze);
  margin: var(--space-lg) 0;
  background: var(--color-off-white);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ========================================
   FEATURES GRID
   ======================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

.feature-card {
  background: linear-gradient(135deg, var(--color-off-white) 0%, #e8e8e8 100%);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.feature-card:hover {
  border-color: var(--color-gold-primary);
  transform: scale(1.03);
  box-shadow: var(--shadow-gold);
}

.feature-card__icon {
  font-size: 3rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.feature-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-bronze);
  margin-bottom: var(--space-xs);
}

.feature-card__desc {
  font-size: 1rem;
  color: var(--color-gray);
}

/* ========================================
   HISTORY TIMELINE
   ======================================== */
.timeline {
  position: relative;
  padding-left: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-gold-bright), var(--color-bronze));
  border-radius: 2px;
}

.timeline__item {
  position: relative;
  margin-bottom: var(--space-xl);
  padding-left: var(--space-md);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-xl) - 6px);
  top: 0.5rem;
  width: 15px;
  height: 15px;
  background: var(--color-gold-bright);
  border-radius: 50%;
  border: 3px solid var(--color-white);
  box-shadow: var(--shadow-sm);
}

.timeline__title {
  font-size: 1.3rem;
  color: var(--color-bronze);
  margin-bottom: var(--space-xs);
}

/* ========================================
   SCIENCE CARDS
   ======================================== */
.science-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.science-card {
  background: var(--color-off-white);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border-top: 4px solid var(--color-gold-primary);
  transition: transform var(--transition-base);
}

.science-card:hover {
  transform: translateY(-5px);
}

.science-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.science-card__title {
  font-size: 1.2rem;
  color: var(--color-bronze);
  margin-bottom: var(--space-xs);
}

/* ========================================
   THEMES SECTION
   ======================================== */
.themes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.theme-card {
  background: linear-gradient(135deg, var(--color-sand-light) 0%, var(--color-white) 100%);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-gold-primary);
}

.theme-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.theme-card__title {
  font-size: 1.2rem;
  color: var(--color-bronze);
  margin-bottom: var(--space-sm);
}

.theme-card__list {
  font-size: 1rem;
  color: var(--color-gray);
  line-height: 1.8;
}

/* ========================================
   AUDIENCE TAGS
   ======================================== */
.audience-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin: var(--space-lg) 0;
}

.audience-tag {
  background: var(--color-bronze);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  transition: all var(--transition-base);
  font-size: 0.95rem;
}

.audience-tag:hover {
  background: var(--color-gold-primary);
  transform: scale(1.08);
  box-shadow: var(--shadow-gold);
}

.audience-recommendations {
  margin-top: var(--space-xl);
}

.audience-recommendations__list {
  list-style: none;
  display: grid;
  gap: var(--space-sm);
}

.audience-recommendations__item {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-off-white);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-gold-primary);
}

.audience-warning {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--color-gold-dark);
}

/* ========================================
   GALLERY
   ======================================== */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.gallery__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base);
  aspect-ratio: 3/4;
}

.gallery__item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-xl);
}

.gallery__item:hover .gallery__overlay {
  opacity: 1;
}

.gallery__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.gallery__item:hover .gallery__image {
  transform: scale(1.1);
}

.gallery__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85), transparent);
  padding: var(--space-lg) var(--space-md) var(--space-md);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.gallery__caption {
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 1.1rem;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

/* ========================================
   SUMMARY
   ======================================== */
.summary {
  text-align: justify;
  line-height: 1.9;
}

.summary__tagline {
  text-align: center;
  font-size: 1.4rem;
  color: var(--color-bronze);
  margin-bottom: var(--space-xl);
  font-family: var(--font-display);
}

.summary__paragraph {
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
}

.summary__paragraph:last-of-type {
  text-align: center;
  font-size: 1.2rem;
  margin-top: var(--space-xl);
}

/* ========================================
   CTA BUTTONS
   ======================================== */
.cta-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: linear-gradient(135deg, var(--color-gold-primary) 0%, var(--color-gold-bright) 100%);
  color: var(--color-slate);
  padding: 1rem 2.5rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl), var(--shadow-gold);
  background: linear-gradient(135deg, var(--color-gold-bright) 0%, #ffed4e 100%);
}

.cta-button:focus-visible {
  outline: 3px solid var(--color-slate);
  outline-offset: 3px;
}

.cta-button--secondary {
  background: transparent;
  border: 2px solid var(--color-gold-primary);
  color: var(--color-slate);
}

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

/* ========================================
   AUTHOR SECTION
   ======================================== */
.author-section {
  display: flex;
  justify-content: center;
  margin-top: 80px;
  padding: var(--space-md);
}

.author-container {
  background: rgba(26, 20, 16, 0.85);
  border-radius: 20px;
  padding: 40px 30px;
  text-align: center;
  max-width: 700px;
  width: 100%;
  box-shadow: 
    0 15px 50px rgba(0, 0, 0, 0.6),
    inset 0 0 40px rgba(255, 215, 0, 0.1);
  border: 2px solid rgba(139, 105, 20, 0.5);
}

.author-tagline {
  font-family: var(--font-display);
  font-size: 1.3em;
  color: var(--color-gold-bright);
  font-style: italic;
  margin-bottom: 20px;
  text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.8);
}

.author-photo {
  width: 180px;
  height: auto;
  margin: 0 auto 25px;
  display: block;
  filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.3));
}

.author-name {
  font-family: var(--font-display);
  font-size: 2.2em;
  color: var(--color-gold-bright);
  margin-bottom: 20px;
  text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.9);
  letter-spacing: 1px;
  border-bottom: none;
  padding-bottom: 0;
}

.author-name::after {
  display: none;
}

.author-contact-btn {
  display: inline-block;
  padding: 12px 25px;
  background: linear-gradient(135deg, var(--color-gold-bright) 0%, var(--color-gold-dark) 100%);
  color: var(--color-slate-dark);
  text-decoration: none;
  border-radius: 25px;
  font-weight: bold;
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.author-contact-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

.trilogy-link {
  display: block;
  margin-top: var(--space-md);
  color: var(--color-gold-bright);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 1.1rem;
  transition: all var(--transition-base);
  opacity: 0.9;
}

.trilogy-link:hover {
  opacity: 1;
  text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
  transform: scale(1.05);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
}

.footer__copyright {
  font-size: 0.95rem;
  color: rgba(26, 20, 16, 0.8);
  margin: 0;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  :root {
    --space-2xl: 2.5rem;
  }
  
  .header {
    padding: 6rem var(--space-sm) 3rem;
  }
  
  .section {
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
  }
  
  .nav__list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
  }
  
  .lang-switcher {
    top: var(--space-xs);
    right: var(--space-xs);
    padding: var(--space-xs);
  }
  
  .lang-btn {
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
  }
  
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .timeline {
    padding-left: var(--space-lg);
  }
  
  .timeline__item::before {
    left: calc(-1 * var(--space-lg) - 6px);
  }
  
  .cta-container {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-button {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .gallery {
    grid-template-columns: 1fr;
  }
  
  .features-grid,
  .science-grid,
  .themes-grid {
    grid-template-columns: 1fr;
  }
  
  .audience-tags {
    flex-direction: column;
    align-items: center;
  }
  
  .audience-tag {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.text-gold {
  color: var(--color-gold-bright);
}

.mt-lg {
  margin-top: var(--space-lg);
}

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