/* ============================================
   📐 Layout & Structure
   Header, Footer, Navigation, Sections
   ============================================ */

/* ===== Base Layout ===== */
body {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Animated Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ===== Skip Link for Accessibility ===== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-2) var(--spacing-4);
  z-index: 100;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* ===== Focus Styles for Accessibility ===== */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .animate-float,
  .animate-pulse {
    animation: none;
  }
}

/* ===== Header & Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

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

.nav-brand {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  background: var(--color-primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.nav-brand:hover {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  list-style: none;
}

.nav-link {
  padding: var(--spacing-2) var(--spacing-4);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-primary-gradient);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
  background: var(--color-surface);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

/* Navigation Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

/* Theme Toggle */
.theme-toggle {
  padding: var(--spacing-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.theme-toggle:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-primary);
  transform: rotate(180deg);
}



/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition-base);
}

.mobile-menu-toggle:hover {
  background: var(--color-surface-hover);
}

/* Mobile Menu Open State */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Main Content ===== */
main {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-8) 0;
}

/* ===== Sections ===== */
.section {
  padding: var(--spacing-16) 0;
}

.section-sm {
  padding: var(--spacing-8) 0;
}

.section-lg {
  padding: var(--spacing-24) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.section-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-4);
  background: var(--color-primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Hero Section ===== */
.hero {
  min-height: calc(100vh - 100px);
  display: flex;
  align-items: center;
  padding: var(--spacing-8) 0;
}

.hero > .container > .hero {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--spacing-8);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  width: fit-content;
  padding: var(--spacing-2) var(--spacing-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.2;
  margin: 0;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  margin-top: var(--spacing-2);
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  margin-top: -5rem;
}

.hero-image-wrapper {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-3);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-image img {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-xl);
  width: 200px;
  height: 260px;
  object-fit: cover;
  object-position: top center;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-12) 0 var(--spacing-6);
  margin-top: var(--spacing-20);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

.footer-section h4 {
  margin-bottom: var(--spacing-4);
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  list-style: none;
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  text-decoration: none;
}

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

.footer-bottom {
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-divider);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.social-links {
  display: flex;
  gap: var(--spacing-3);
  justify-content: center;
  margin-top: var(--spacing-4);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
  text-decoration: none;
}

.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  .hero > .container > .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-6);
  }
  
  .hero-badge,
  .hero-actions {
    justify-content: center;
  }
  
  .hero-image {
    order: -1;
  }
  
  .hero-image img {
    width: 220px;
    height: 280px;
  }
  
  .hero-title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur-strong);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-4);
    gap: var(--spacing-2);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .nav-link {
    width: 100%;
    text-align: center;
  }
  
  .section-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-title {
    font-size: clamp(2rem, 8vw, 3rem);
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 var(--spacing-4);
  }
  
  .section {
    padding: var(--spacing-12) 0;
  }
  
  .hero {
    padding: var(--spacing-8) 0;
    min-height: auto;
  }
}