:root {
  --primary-bg: #050a18;
  --secondary-bg: #0d1224;
  --accent-color: #3b82f6; /* Deep Blue for Space EO */
  --accent-glow: rgba(59, 130, 246, 0.4);
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --glass-bg: rgba(13, 18, 36, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --font-family: "Outfit", sans-serif;
}

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

body {
  background-color: var(--primary-bg);
  background-image: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 80%);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Background Blobs */
.blob {
  position: fixed;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.3;
}
.blob-1 { top: -25vw; right: -10vw; }
.blob-2 { bottom: -25vw; left: -10vw; }

nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(12px);
  background: rgba(5, 10, 24, 0.8);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
}

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

.logo-container img {
  height: 40px;
  background: white;
  padding: 5px;
  border-radius: 4px;
}

.logo-text {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.5px;
}

.logo-text .accent {
  color: var(--accent-color);
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.breadcrumb-item {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.breadcrumb-link {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: 0.3s;
}

.breadcrumb-link:hover {
  color: var(--accent-color);
}

.breadcrumb-sep {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: 0.3s;
}
.nav-links a:hover { color: var(--accent-color); }

header {
  padding: 8rem 5% 4rem;
  text-align: center;
}

h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(to right, #fff, var(--accent-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto;
}

main {
  padding: 2rem 5% 8rem;
  max-width: 1200px;
  margin: 0 auto;
}

.schedule-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.day-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2rem;
  transition: 0.4s;
  display: flex;
  flex-direction: column;
}

.day-card:hover {
  border-color: var(--accent-color);
  transform: translateY(-5px);
  background: rgba(13, 18, 36, 0.9);
}

.date-badge {
  color: var(--accent-color);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
  display: block;
}

.topic-list {
  list-style: none;
}

.topic-item {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.topic-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.topic-name {
  font-size: 1.2rem;
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

.topic-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  gap: 1rem;
}

.tag {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  background: rgba(255,255,255,0.1);
  text-transform: uppercase;
}

.tag.lecture { border: 1px solid #3b82f6; color: #3b82f6; }
.tag.workshop { border: 1px solid #10b981; color: #10b981; }
.tag.assignment { border: 1px solid #f59e0b; color: #f59e0b; }

.btn-link {
  margin-top: auto;
  padding: 0.75rem 1rem;
  background: var(--accent-color);
  color: white;
  text-align: center;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: 0.3s;
}

.btn-link:hover {
  filter: brightness(1.2);
  transform: scale(1.02);
}

/* Instructor Section */
.instructor-card {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 30px;
  padding: 4rem;
  align-items: center;
  margin-top: 4rem;
}

.instructor-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 20px;
  border: 2px solid var(--accent-color);
  box-shadow: 0 0 30px var(--accent-glow);
}

.instructor-info h3 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.instructor-title {
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 1.5rem;
  display: block;
}

.instructor-bio {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 2rem;
  text-align: justify;
}

.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-link {
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  transition: 0.3s;
}

.social-link:hover {
  background: var(--accent-color);
  color: #fff;
}

@media (max-width: 900px) {
  .instructor-card {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 2rem;
  }
  .instructor-img {
    max-width: 300px;
    margin: 0 auto;
  }
  .social-links {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
}