/**
 * RustyTorch++ Landing Page Styles
 */

/* CSS Variables */
:root {
  --landing-primary: #FF6B35;
  --landing-primary-dark: #E55A2B;
  --landing-secondary: #1A1A2E;
  --landing-accent: #4ECDC4;
  --landing-bg: #0F0F1A;
  --landing-card-bg: #1E1E2E;
  --landing-card-hover: #2A2A3E;
  --landing-text: #FFFFFF;
  --landing-text-muted: #B0B0B0;
  --landing-border: #2E2E3E;
  --landing-success: #22C55E;
  --landing-warning: #F59E0B;
}

/* Landing Page Container */
.landing-page {
  min-height: 100vh;
  background: var(--landing-bg);
  color: var(--landing-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
}

/* ===== HERO SECTION ===== */
.hero-header {
  position: relative;
  padding: 4rem 2rem;
  text-align: center;
  background: linear-gradient(180deg, var(--landing-secondary) 0%, var(--landing-bg) 100%);
  overflow: hidden;
}

.hero-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(255, 107, 53, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(78, 205, 196, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-logo {
  font-size: 4rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
  background: linear-gradient(135deg, var(--landing-primary) 0%, var(--landing-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.5rem;
  color: var(--landing-text);
  margin: 0 0 1rem;
  font-weight: 500;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--landing-text-muted);
  margin: 0;
}

.hero-subtitle span {
  margin: 0 0.5rem;
}

.hero-divider {
  color: var(--landing-primary);
}

/* ===== FEATURES GRID ===== */
.features-section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 2rem;
  color: var(--landing-text);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--landing-card-bg);
  border: 1px solid var(--landing-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--landing-primary);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--landing-text);
}

.feature-description {
  font-size: 0.95rem;
  color: var(--landing-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* ===== PERFORMANCE SECTION ===== */
.performance-section {
  padding: 4rem 2rem;
  background: var(--landing-secondary);
}

.performance-content {
  max-width: 900px;
  margin: 0 auto;
}

.performance-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.performance-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.performance-label {
  font-size: 1rem;
  font-weight: 500;
  color: var(--landing-text);
  margin-bottom: 0.25rem;
}

.performance-bar-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.performance-bar-wrapper {
  flex: 1;
  height: 24px;
  background: var(--landing-bg);
  border-radius: 4px;
  overflow: hidden;
}

.performance-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 1s ease-out;
}

.performance-bar.pytorch {
  background: linear-gradient(90deg, #EE4C2C, #FF6B35);
}

.performance-bar.rustytorch {
  background: linear-gradient(90deg, var(--landing-accent), var(--landing-primary));
}

.performance-value {
  min-width: 100px;
  font-size: 0.9rem;
  color: var(--landing-text-muted);
  text-align: right;
}

.performance-speedup {
  font-weight: 700;
  color: var(--landing-success);
  font-size: 1rem;
  min-width: 60px;
  text-align: center;
}

.performance-framework-label {
  font-size: 0.85rem;
  color: var(--landing-text-muted);
  min-width: 80px;
}

/* ===== DEMO GALLERY ===== */
.demo-gallery {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.category-section {
  margin-bottom: 3rem;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--landing-border);
}

.category-icon {
  font-size: 1.5rem;
}

.category-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0;
  color: var(--landing-text);
}

.demo-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* Demo Card */
.demo-card {
  background: var(--landing-card-bg);
  border: 1px solid var(--landing-border);
  border-radius: 12px;
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}

.demo-card.live:hover {
  transform: translateY(-4px);
  border-color: var(--landing-primary);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.15);
}

.demo-card.coming-soon {
  opacity: 0.7;
  cursor: default;
}

.demo-card.coming-soon:hover {
  opacity: 0.8;
}

.demo-thumbnail {
  width: 100%;
  height: 120px;
  background: var(--landing-bg);
  border-radius: 8px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.demo-thumbnail-placeholder {
  font-size: 3rem;
  opacity: 0.3;
}

.demo-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.demo-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--landing-text);
}

.demo-card-description {
  font-size: 0.9rem;
  color: var(--landing-text-muted);
  margin: 0 0 1rem;
  line-height: 1.4;
  flex: 1;
}

.demo-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.status-badge {
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  font-weight: 500;
}

.status-badge.live {
  background: rgba(34, 197, 94, 0.15);
  color: var(--landing-success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.status-badge.coming-soon {
  background: rgba(245, 158, 11, 0.15);
  color: var(--landing-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.launch-button {
  background: var(--landing-primary);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.launch-button:hover {
  background: var(--landing-primary-dark);
}

/* ===== FOOTER ===== */
.landing-footer {
  padding: 2rem;
  text-align: center;
  border-top: 1px solid var(--landing-border);
  color: var(--landing-text-muted);
  font-size: 0.9rem;
}

.landing-footer a {
  color: var(--landing-primary);
  text-decoration: none;
}

.landing-footer a:hover {
  text-decoration: underline;
}

/* ===== BACK BUTTON (for demo pages) ===== */
.back-button {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  background: var(--landing-card-bg);
  border: 1px solid var(--landing-border);
  color: var(--landing-text);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
}

.back-button:hover {
  background: var(--landing-card-hover);
  border-color: var(--landing-primary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero-logo {
    font-size: 2.5rem;
  }

  .hero-tagline {
    font-size: 1.2rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-subtitle span {
    display: block;
    margin: 0.25rem 0;
  }

  .hero-divider {
    display: none;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .demo-cards-grid {
    grid-template-columns: 1fr;
  }

  .performance-bar-container {
    flex-wrap: wrap;
  }

  .performance-value {
    min-width: auto;
    width: 100%;
    text-align: left;
    margin-top: 0.25rem;
  }
}