/* ==========================================
   LANDING PAGE STYLES
   ========================================== */

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 900px;
  padding: var(--spacing-md);
}

.hero-title {
  font-size: clamp(3rem, 10vw, 6rem);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, #fff 0%, #a8c0ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.2); }
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--star-glow);
  margin-bottom: var(--spacing-sm);
  font-weight: 300;
  letter-spacing: 2px;
}

.hero-author {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
  letter-spacing: 1px;
  font-style: italic;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.1rem;
  padding: 1.2rem 2.5rem;
}

/* Starfield Background */
#starfield {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* Planet Grid */
.planet-grid {
  position: relative;
  z-index: 10;
  padding: var(--spacing-xl) var(--spacing-md);
}

.planet-grid-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  font-size: clamp(2.5rem, 6vw, 4rem);
}

.planets-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

/* Planet Card */
.planet-card {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: var(--spacing-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-medium);
  backdrop-filter: blur(10px);
}

.planet-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-medium);
  pointer-events: none;
}

.planet-card:hover {
  transform: translateY(-10px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
}

.planet-card:hover::before {
  opacity: 1;
}

/* Planet Card Colors */
.planet-card[data-planet="hd189733b"] {
  border-color: var(--hd189733b-primary);
  box-shadow: 0 10px 40px rgba(0, 71, 171, 0.3);
}

.planet-card[data-planet="wasp76b"] {
  border-color: var(--wasp76b-primary);
  box-shadow: 0 10px 40px rgba(255, 107, 53, 0.3);
}

.planet-card[data-planet="cancri"] {
  border-color: var(--cancri-primary);
  box-shadow: 0 10px 40px rgba(255, 69, 0, 0.3);
}

.planet-card[data-planet="kepler16b"] {
  border-color: var(--kepler-primary);
  box-shadow: 0 10px 40px rgba(212, 165, 116, 0.3);
}

.planet-card[data-planet="tres2b"] {
  border-color: var(--tres2b-secondary);
  box-shadow: 0 10px 40px rgba(139, 0, 0, 0.3);
}

.planet-card-image {
  width: 100%;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 16px;
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.planet-icon {
  font-size: 5rem;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.planet-card-content {
  position: relative;
  z-index: 2;
}

.planet-card-name {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-xs);
  color: var(--star-white);
}

.planet-card-type {
  color: var(--star-glow);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

.planet-card-fact {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  min-height: 3em;
}

.planet-card-link {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid currentColor;
  border-radius: 30px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.planet-card-link:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(5px);
}

/* Responsive */
@media (max-width: 768px) {
  .planets-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .planet-card-image {
    height: 150px;
  }
  
  .planet-icon {
    font-size: 4rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .planet-card {
    padding: var(--spacing-sm);
  }
  
  .planet-card-name {
    font-size: 1.5rem;
  }
}