/* Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Accessibility - Skip to Content */
.skip-to-content {
  position: absolute;
  left: -9999px;
  z-index: 9999;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--accent);
  color: var(--white);
  text-decoration: none;
  border-radius: 0;
  font-weight: var(--font-weight-medium);
}

.skip-to-content:focus {
  left: 50%;
  top: var(--spacing-md);
  transform: translateX(-50%);
}

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

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-light);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-y: auto;
  overflow-x: hidden;
  height: auto;
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Vertical Scrolling Container */
.horizontal-container {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: auto;
}

.section {
  width: 100vw;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--spacing-2xl);
  padding-bottom: 60px; /* Space for minimal footer */
}

/* Navigation */
.nav {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1000;
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.nav-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--gray-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.nav-dot:hover {
  transform: scale(1.2);
  background-color: var(--accent);
}

.nav-dot.active {
  background-color: var(--accent);
  border-color: var(--accent);
  transform: scale(1.3);
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: var(--spacing-lg);
  left: var(--spacing-lg);
  z-index: 1000;
  background: none;
  border: 2px solid var(--text-primary);
  color: var(--text-primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  transition: all var(--transition-fast);
}

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

/* Typography */
h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-light);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-light);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-normal);
  margin-bottom: var(--spacing-sm);
}

p {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--text-secondary);
}

/* Accent Text */
.accent-text {
  color: var(--accent);
  font-weight: var(--font-weight-medium);
}

.accent-text-secondary {
  color: var(--accent-secondary);
  font-weight: var(--font-weight-medium);
}

/* Buttons */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border: 2px solid var(--accent);
  background-color: transparent;
  color: var(--accent);
  cursor: pointer;
  transition: all var(--transition-fast);
  border-radius: 0;
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  background-color: var(--accent);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Content Box */
.content-box {
  max-width: 800px;
  padding: var(--spacing-xl);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  right: var(--spacing-xl);
  bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.scroll-indicator::after {
  content: '↓';
  font-size: var(--font-size-xl);
}

/* Responsive Design - Mobile */
@media (max-width: 768px) {
  .section {
    padding: 80px var(--spacing-lg) var(--spacing-2xl);
  }

  /* Typography scaling */
  h1 {
    font-size: var(--font-size-3xl);
  }

  h2 {
    font-size: var(--font-size-2xl);
  }

  h3 {
    font-size: var(--font-size-xl);
  }

  p {
    font-size: var(--font-size-base);
  }

  .content-box {
    padding: var(--spacing-md);
    max-width: 100%;
  }

  /* Hide scroll indicators on mobile */
  .scroll-indicator {
    display: none;
  }

  /* Navigation dots - hide on mobile */
  .nav {
    display: none;
  }

  /* Theme toggle */
  .theme-toggle {
    top: var(--spacing-md);
    left: var(--spacing-md);
    width: 45px;
    height: 45px;
  }

  /* Footer - make it static on mobile for better UX */
  .footer {
    position: static;
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg) var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
  }
}

/* Loading Animation */
.fade-in {
  animation: fadeIn 1s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Footer */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100vw;
  background-color: transparent;
  padding: var(--spacing-sm) var(--spacing-lg);
  z-index: 1001;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  font-size: var(--font-size-xs);
  transition: background-color var(--transition-normal);
  box-sizing: border-box;
}

.footer span {
  color: var(--text-secondary);
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
}

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

.footer-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.footer-icon svg {
  display: block;
  transition: transform var(--transition-fast);
}

.footer-icon:hover svg {
  transform: translateY(-2px);
}