/* ========================================
   Main Layout & Page Styles
   ======================================== */

/* ========== Container ========== */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

/* ========== Sections ========== */
section {
  padding: var(--space-20) 0;
  position: relative;
}

section:nth-child(even) {
  background: rgba(255, 255, 255, 0.01);
}

/* ========== Header / Navigation ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: rgba(10, 14, 39, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.1);
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(10, 14, 39, 0.95);
  box-shadow: var(--shadow-lg);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: var(--font-extrabold);
  color: var(--color-primary);
  text-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-link:hover {
  color: var(--color-primary);
}

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

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: var(--space-4); /* Increased hit area */
  position: relative;
  z-index: 1001; /* Ensure it's above other elements */
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.menu-toggle span {
  width: 30px;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

/* ========== Hero Section ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 1000px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: var(--z-base);
}

.hero-title {
  font-size: var(--text-6xl);
  font-weight: var(--font-extrabold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-6);
  line-height: 1.2;
  animation: fadeInUp var(--transition-slow) ease-out;
}

.hero-subtitle {
  font-size: var(--text-2xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  animation: fadeInUp var(--transition-slow) ease-out 0.2s backwards;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-tertiary);
  max-width: 700px;
  margin: 0 auto var(--space-10);
  line-height: var(--leading-relaxed);
  animation: fadeInUp var(--transition-slow) ease-out 0.4s backwards;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  animation: fadeInUp var(--transition-slow) ease-out 0.6s backwards;
}

/* ========== Features Section ========== */
.features {
  background: var(--color-bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
}

.feature-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
  color: var(--color-primary-light);
}

.feature-description {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ========== Versions Section ========== */
.versions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
}

.version-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.version-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  box-shadow: var(--shadow-glow);
}

.version-name {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-2);
}

.version-tagline {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.version-features {
  margin: var(--space-6) 0;
}

.version-feature {
  display: flex;
  align-items: start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
}

.version-feature::before {
  content: '✓';
  color: var(--color-accent);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  flex-shrink: 0;
}

.version-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
}

.version-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.version-info strong {
  color: var(--color-text-secondary);
}

/* ========== FAQ Section ========== */
.faq {
  background: var(--color-bg-primary);
}

.faq-grid {
  max-width: 900px;
  margin: 0 auto;
}

/* ========== Footer ========== */
.footer {
  background: var(--color-bg-secondary);
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid rgba(212, 175, 55, 0.1);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-section h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.footer-section p,
.footer-section a {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  display: block;
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-primary-light);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.social-links {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  font-size: var(--text-xl);
  transition: all var(--transition-base);
}

.social-link:hover {
  background: var(--gradient-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--color-text-tertiary);
}

/* ========== Responsive Design ========== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: var(--text-5xl);
  }
  
  .section-title {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 768px) {
  /* Mobile Menu */
  .menu-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-8);
    gap: var(--space-6);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  /* Hero */
  .hero {
    min-height: auto;
    padding: var(--space-20) 0;
  }
  
  .hero-title {
    font-size: var(--text-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--text-xl);
  }
  
  .hero-description {
    font-size: var(--text-base);
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  /* Sections */
  section {
    padding: var(--space-12) 0;
  }
  
  .section-title {
    font-size: var(--text-2xl);
  }
  
  /* Grids */
  .features-grid,
  .versions-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: var(--space-3);
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .btn-lg {
    width: 100%;
  }
}

/* ========== Utility Classes ========== */
.text-center {
  text-align: center;
}

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

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

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.hidden {
  display: none;
}

.visible {
  display: block;
}