/* Component Styles */

/* Header */
.header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-logo:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Progress Indicator */
.progress-indicator {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.progress-bar {
  width: 100px;
  height: 4px;
  background-color: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

@media (max-width: 640px) {
  .progress-bar {
    width: 60px;
  }

  .progress-text {
    display: none;
  }
}

/* Theme Toggle Button */
.theme-toggle {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  background-color: var(--border-hover);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: var(--text-primary);
}

/* Navigation Menu Button */
.nav-toggle {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.5rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 44px;
  height: 44px;
  justify-content: center;
  align-items: center;
  transition: all 0.2s ease;
}

.nav-toggle:hover {
  background-color: var(--border-hover);
}

.nav-toggle-line {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all 0.3s ease;
}

.nav-toggle.active .nav-toggle-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .nav-toggle-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Navigation Menu */
.nav-menu {
  position: fixed;
  top: 73px;
  right: 0;
  width: 300px;
  max-width: 90vw;
  height: calc(100vh - 73px);
  background-color: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  z-index: 40;
}

.nav-menu.active {
  transform: translateX(0);
}

.nav-menu-content {
  padding: 1.5rem;
}

.nav-menu-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.nav-menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu-item {
  margin-bottom: 0;
}

.nav-menu-link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
  font-size: 0.9375rem;
}

.nav-menu-link:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-menu-link.active {
  background-color: var(--color-primary);
  color: white;
}

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

/* Overlay for mobile menu */
.nav-overlay {
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 30;
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Footer Navigation */
.footer-nav {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer-nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-nav-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.2s ease;
  min-height: 44px;
  font-weight: 500;
}

.footer-nav-button:hover {
  background-color: var(--border-hover);
  text-decoration: none;
  transform: translateY(-2px);
}

.footer-nav-button.primary {
  background-color: var(--color-primary);
  color: white;
  border: none;
}

.footer-nav-button.primary:hover {
  background-color: var(--color-primary-hover);
}

.footer-nav-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-nav-title {
  font-size: 1rem;
  font-weight: 600;
}

@media (max-width: 640px) {
  .footer-nav-content {
    flex-direction: column;
  }

  .footer-nav-button {
    width: 100%;
    justify-content: center;
  }
}

/* Key Takeaways Section */
.key-takeaways {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--color-primary);
  padding: 1.5rem;
  border-radius: 0.5rem;
  margin: 3rem 0;
}

.key-takeaways h3 {
  color: var(--color-primary);
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.key-takeaways ul {
  list-style: none;
  margin-left: 0;
}

.key-takeaways li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.key-takeaways li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: bold;
}

/* Hero Section (for index page) */
.hero {
  text-align: center;
  padding: 4rem 0 3rem;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
  .hero {
    padding: 2rem 0 1.5rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }
}

/* Presenter Section */
.presenter {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  background-color: var(--bg-secondary);
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  margin: 3rem 0;
}

.presenter-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.presenter-info h3 {
  margin-bottom: 0.25rem;
}

.presenter-title {
  color: var(--color-primary);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.presenter-bio {
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 640px) {
  .presenter {
    flex-direction: column;
    text-align: center;
  }
}

/* Section Grid (for index page) */
.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.section-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
}

.section-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  text-decoration: none;
}

.section-number {
  display: inline-block;
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: white;
  border-radius: 50%;
  text-align: center;
  line-height: 32px;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.section-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.section-card-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}