:root {
  /* Colors */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-accent: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-gold: #fbbf24;
  --accent-gold-hover: #f59e0b;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  
  /* Spacing */
  --section-padding: 5rem;
  --container-width: 1100px;
  
  /* Typography */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Montserrat', sans-serif;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

/* Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  padding: 2rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-gold);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--accent-gold);
  border-radius: 2px;
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: all 0.3s ease;
}

header.scrolled {
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  border-bottom: 1px solid var(--glass-border);
}

nav ul {
  display: flex;
  justify-content: flex-end;
  list-style: none;
  gap: 2rem;
}

nav a:hover {
  color: var(--accent-gold);
}

/* Hero Section */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: radial-gradient(circle at top right, rgba(251, 191, 36, 0.05), transparent 40%),
              radial-gradient(circle at bottom left, rgba(30, 41, 59, 1), transparent 50%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 4.5rem;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-text .subtitle {
  font-size: 1.5rem;
  color: var(--accent-gold);
  margin-bottom: 2rem;
  font-weight: 500;
}

.hero-text .profile-brief {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 500px;
}

.hero-image {
  position: relative;
  justify-self: center;
}

.hero-image img {
  width: 400px;
  height: 500px;
  object-fit: cover;
  border-radius: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--glass-border);
}

.hero-image::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--accent-gold);
  border-radius: 2rem;
  z-index: -1;
}

/* Experience Section */
#experience {
  padding: var(--section-padding) 0;
}

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

.experience-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
}

.exp-date {
  font-weight: 600;
  color: var(--accent-gold);
  padding-top: 2rem;
}

.exp-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.exp-company {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-weight: 600;
}

.exp-details {
  list-style: none;
}

.exp-details li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.exp-details li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-gold);
}

/* Dual Column Content (Projects / Honors) */
.dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 4rem;
}

.feature-img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 1rem;
  margin-bottom: 1.5rem;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.skill-tag {
  background: var(--bg-accent);
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  text-align: center;
  border: 1px solid var(--glass-border);
}

/* Footer */
footer {
  padding: 4rem 0;
  border-top: 1px solid var(--glass-border);
  text-align: center;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 968px) {
  nav ul {
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-text h1 {
    font-size: 3rem;
  }
  
  .experience-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .exp-date {
    padding-top: 0;
  }
  
  .dual-grid {
    grid-template-columns: 1fr;
  }
}