/* ============================================
   ZIYO INTERNATIONAL - MAIN STYLESHEET
   Netflix/Hollywood Elite World Standard
   Version: 1.0 | January 2026
   ============================================ */

/* ============================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */
:root {
  /* Primary Colors - Copper Theme */
  --copper-gold: #B87333;
  --copper-light: #CD853F;
  --copper-dark: #8B4513;
  --copper-gradient: linear-gradient(135deg, #B87333 0%, #CD853F 50%, #DAA520 100%);

  /* Accent Colors */
  --accent-blue: #1E90FF;
  --accent-teal: #008B8B;
  --accent-emerald: #50C878;
  --accent-gold: #FFD700;

  /* Dark Theme Colors */
  --dark-primary: #0A0A0A;
  --dark-secondary: #141414;
  --dark-tertiary: #1F1F1F;
  --dark-card: #262626;
  --dark-card-hover: #333333;
  --dark-border: #333333;

  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #B3B3B3;
  --text-muted: #737373;
  --text-copper: #CD853F;

  /* Gradients */
  --gradient-dark: linear-gradient(180deg, #0A0A0A 0%, #1F1F1F 100%);
  --gradient-radial: radial-gradient(ellipse at center, #1F1F1F 0%, #0A0A0A 100%);
  --gradient-hero: linear-gradient(180deg, rgba(10,10,10,0.3) 0%, rgba(10,10,10,0.9) 100%);
  --gradient-card: linear-gradient(180deg, rgba(38,38,38,0) 0%, rgba(38,38,38,0.95) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-chinese: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* Fluid Typography Scale */
  --text-6xl: clamp(3.5rem, 3rem + 5vw, 7rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 6rem);
  --text-4xl: clamp(2.5rem, 1.8rem + 3.5vw, 4rem);
  --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
  --text-base: 1rem;
  --text-sm: 0.875rem;
  --text-xs: 0.75rem;

  /* 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;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Section Padding */
  --section-padding: clamp(60px, 10vw, 120px);
  --section-padding-sm: clamp(40px, 8vw, 80px);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
  --shadow-copper: 0 10px 40px rgba(184, 115, 51, 0.3);
  --shadow-glow: 0 0 60px rgba(184, 115, 51, 0.2);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-slower: 0.8s ease;
  --transition-bounce: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background-color: var(--dark-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Chinese Font Support */
html[lang="zh"] body,
html[lang="zh-CN"] body {
  font-family: var(--font-chinese);
}

/* Selection Styling */
::selection {
  background-color: var(--copper-gold);
  color: var(--dark-primary);
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--copper-gold);
  outline-offset: 2px;
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

.display-title {
  font-size: var(--text-6xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  max-width: 600px;
}

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

.text-gradient {
  background: var(--copper-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

a:hover {
  color: var(--copper-gold);
}

/* ============================================
   4. LAYOUT UTILITIES
   ============================================ */
.container-fluid {
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

@media (min-width: 992px) {
  .container-fluid {
    padding-left: var(--space-2xl);
    padding-right: var(--space-2xl);
  }
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-sm {
  padding: var(--section-padding-sm) 0;
}

.section-dark {
  background: var(--dark-secondary);
}

.section-gradient {
  background: var(--gradient-dark);
}

/* ============================================
   5. NAVBAR STYLES
   ============================================ */
.navbar-ziyo {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  padding: var(--space-lg) 0;
  transition: all var(--transition-base);
  background: transparent;
}

.navbar-ziyo.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-md) 0;
  box-shadow: var(--shadow-md);
}

.navbar-brand-ziyo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary) !important;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.navbar-brand-ziyo .brand-icon {
  width: 40px;
  height: 40px;
  background: var(--copper-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark-primary);
  font-weight: 800;
}

.nav-link-ziyo {
  color: var(--text-secondary) !important;
  font-weight: 500;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-sm) var(--space-md) !important;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link-ziyo:hover,
.nav-link-ziyo.active {
  color: var(--copper-gold) !important;
}

.nav-link-ziyo::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-md);
  right: var(--space-md);
  height: 2px;
  background: var(--copper-gradient);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-link-ziyo:hover::after,
.nav-link-ziyo.active::after {
  transform: scaleX(1);
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-full);
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-toggle:hover {
  border-color: var(--copper-gold);
}

.lang-toggle .lang-text {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

/* Mobile Navigation */
.navbar-toggler-ziyo {
  border: none;
  background: transparent;
  padding: var(--space-sm);
  cursor: pointer;
}

.navbar-toggler-ziyo .toggler-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 6px 0;
  transition: all var(--transition-fast);
}

/* ============================================
   6. HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.hero-background::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
}

.hero-3d-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  padding: var(--space-xl);
}

.hero-title {
  font-size: var(--text-6xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: var(--text-sm);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ============================================
   7. BUTTONS
   ============================================ */
.btn-ziyo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 16px 32px;
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-bounce);
  text-decoration: none;
}

.btn-copper {
  background: var(--copper-gradient);
  color: var(--dark-primary);
}

.btn-copper:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-copper);
  color: var(--dark-primary);
}

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

.btn-outline-copper:hover {
  background: var(--copper-gold);
  color: var(--dark-primary);
  transform: translateY(-3px);
}

.btn-dark {
  background: var(--dark-card);
  color: var(--text-primary);
  border: 1px solid var(--dark-border);
}

.btn-dark:hover {
  background: var(--dark-card-hover);
  border-color: var(--copper-gold);
  color: var(--text-primary);
}

.btn-lg {
  padding: 20px 40px;
  font-size: var(--text-base);
}

.btn-sm {
  padding: 10px 20px;
  font-size: var(--text-xs);
}

/* ============================================
   8. CARDS
   ============================================ */
.card-ziyo {
  background: var(--dark-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-bounce);
  border: 1px solid transparent;
}

.card-ziyo:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--dark-border);
}

/* Netflix Style Project Card */
.project-card {
  position: relative;
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-bounce);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-card);
  z-index: 1;
}

.project-card:hover {
  transform: scale(1.05);
  z-index: 10;
  box-shadow: var(--shadow-xl);
}

.project-card-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card-bg {
  transform: scale(1.1);
}

.project-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-lg);
  z-index: 2;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-base);
}

.project-card:hover .project-card-content {
  transform: translateY(0);
  opacity: 1;
}

.project-card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.project-card-meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.project-card-badge {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: var(--copper-gradient);
  color: var(--dark-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  z-index: 2;
}

/* Metric Card */
.metric-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--dark-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--dark-border);
  transition: all var(--transition-base);
}

.metric-card:hover {
  border-color: var(--copper-gold);
  transform: translateY(-4px);
}

.metric-card-value {
  font-size: var(--text-4xl);
  font-weight: 800;
  background: var(--copper-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

.metric-card-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Feature Card */
.feature-card {
  padding: var(--space-2xl);
  background: var(--dark-card);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
  border: 1px solid var(--dark-border);
}

.feature-card:hover {
  border-color: var(--copper-gold);
}

.feature-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background: var(--copper-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--dark-primary);
}

.feature-card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.feature-card-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ============================================
   9. METRICS TICKER
   ============================================ */
.metrics-ticker {
  background: var(--dark-secondary);
  padding: var(--space-3xl) 0;
  border-top: 1px solid var(--dark-border);
  border-bottom: 1px solid var(--dark-border);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .metrics-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.metric-item {
  text-align: center;
  padding: var(--space-lg);
}

.metric-value {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.metric-value .counter {
  background: var(--copper-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ============================================
   10. TIMELINE
   ============================================ */
.timeline {
  position: relative;
  padding: var(--space-2xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--dark-border);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  padding: var(--space-xl) 0;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  padding-right: var(--space-3xl);
  text-align: right;
}

.timeline-item:nth-child(even) {
  padding-left: var(--space-3xl);
  margin-left: 50%;
}

.timeline-dot {
  position: absolute;
  width: 20px;
  height: 20px;
  background: var(--copper-gradient);
  border-radius: 50%;
  top: var(--space-xl);
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -10px;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -10px;
}

.timeline-year {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--copper-gold);
  margin-bottom: var(--space-sm);
}

.timeline-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.timeline-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Mobile Timeline */
@media (max-width: 767.98px) {
  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: 100%;
    padding-left: var(--space-3xl);
    padding-right: 0;
    text-align: left;
    margin-left: 0;
  }

  .timeline-item .timeline-dot,
  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 10px;
    right: auto;
  }
}

/* ============================================
   11. FOOTER
   ============================================ */
.footer {
  background: var(--dark-secondary);
  padding: var(--space-4xl) 0 var(--space-2xl);
  border-top: 1px solid var(--dark-border);
}

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

.footer-brand-name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.footer-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 300px;
}

.footer-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: var(--text-muted);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--copper-gold);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.footer-contact-item i {
  color: var(--copper-gold);
  width: 20px;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark-card);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--copper-gradient);
  color: var(--dark-primary);
}

.footer-bottom {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--dark-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal a {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ============================================
   12. FORMS
   ============================================ */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.form-control-ziyo {
  width: 100%;
  padding: 16px 20px;
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-control-ziyo:focus {
  outline: none;
  border-color: var(--copper-gold);
  box-shadow: 0 0 0 3px rgba(184, 115, 51, 0.2);
}

.form-control-ziyo::placeholder {
  color: var(--text-muted);
}

textarea.form-control-ziyo {
  min-height: 150px;
  resize: vertical;
}

.form-select-ziyo {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23B3B3B3' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 20px center;
  padding-right: 50px;
}

/* Form States */
.form-control-ziyo.is-invalid {
  border-color: #ff6b6b;
}

.form-control-ziyo.is-valid {
  border-color: #50C878;
}

.error-message {
  color: #ff6b6b;
  font-size: var(--text-sm);
  margin-top: var(--space-xs);
}

/* Form Loading State */
.loading .form-control-ziyo {
  pointer-events: none;
  opacity: 0.7;
}

/* Alert Styles */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.alert-success {
  background-color: rgba(80, 200, 120, 0.15);
  border: 1px solid rgba(80, 200, 120, 0.3);
  color: #50C878;
}

.alert-danger {
  background-color: rgba(255, 107, 107, 0.15);
  border: 1px solid rgba(255, 107, 107, 0.3);
  color: #ff6b6b;
}

/* ============================================
   13. ANIMATIONS
   ============================================ */
/* Fade Up */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: all var(--transition-slower);
}

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

/* Fade In */
.fade-in {
  opacity: 0;
  transition: opacity var(--transition-slower);
}

.fade-in.visible {
  opacity: 1;
}

/* Scale In */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: all var(--transition-slow);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Slide Left */
.slide-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: all var(--transition-slower);
}

.slide-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide Right */
.slide-right {
  opacity: 0;
  transform: translateX(60px);
  transition: all var(--transition-slower);
}

.slide-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger Animation Delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ============================================
   14. UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.flex-column { flex-direction: column; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.mb-0 { margin-bottom: 0 !important; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

.mt-auto { margin-top: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

.w-100 { width: 100%; }
.max-w-600 { max-width: 600px; }
.max-w-800 { max-width: 800px; }
.max-w-1000 { max-width: 1000px; }

.position-relative { position: relative; }
.overflow-hidden { overflow: hidden; }

.bg-dark-primary { background: var(--dark-primary); }
.bg-dark-secondary { background: var(--dark-secondary); }
.bg-dark-card { background: var(--dark-card); }

/* Dividers */
.divider {
  height: 1px;
  background: var(--dark-border);
  margin: var(--space-3xl) 0;
}

.divider-copper {
  height: 4px;
  width: 60px;
  background: var(--copper-gradient);
  border-radius: var(--radius-full);
}

/* ============================================
   15. RESPONSIVE STYLES
   ============================================ */
@media (max-width: 575.98px) {
  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  .btn-ziyo {
    padding: 14px 24px;
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (min-width: 576px) and (max-width: 767.98px) {
  .hero-title {
    font-size: var(--text-4xl);
  }
}

@media (min-width: 768px) and (max-width: 991.98px) {
  .hero-title {
    font-size: var(--text-4xl);
  }
}

@media (min-width: 992px) {
  .hero-title {
    font-size: var(--text-5xl);
  }
}

@media (min-width: 1200px) {
  .hero-title {
    font-size: var(--text-6xl);
  }
}

/* ============================================
   16. PRINT STYLES
   ============================================ */
@media print {
  .navbar-ziyo,
  .footer,
  .scroll-indicator,
  .hero-3d-container {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    padding: 20px 0;
  }
}

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

  html {
    scroll-behavior: auto;
  }
}