:root {
  --bg: #0a0a0b;
  --bg-elevated: #111113;
  --bg-card: #161618;
  --border: #232326;
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --accent: #22d3ee;
  --accent-dim: #0891b2;
  --accent-glow: rgba(34, 211, 238, 0.15);
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --radius: 12px;
  --max-width: 860px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

a {
  color: inherit;
  text-decoration: none;
}

/* Navigation */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 500;
}

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

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
}

/* Hero */
.hero {
  position: relative;
  padding-bottom: 4rem;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    var(--bg);
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 2rem 3rem;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: #67e8f9;
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.btn-ghost:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Sections */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section-title {
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: #2e2e32;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-org {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.card-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.card-tech {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-dim);
  margin-bottom: 1rem;
}

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

.card-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.card-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
}

/* Education subsections */
.subsection {
  margin-top: 2rem;
}

.subsection-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.course-grid {
  display: grid;
  gap: 1rem;
}

.course-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.course-block h4 {
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.course-block p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Skills */
.skills-grid {
  display: grid;
  gap: 1.5rem;
}

.skill-group h3 {
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tags span {
  font-size: 0.8125rem;
  padding: 0.375rem 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  transition: border-color 0.2s;
}

.skill-tags span:hover {
  border-color: var(--accent-dim);
}

/* Achievements */
.achievement-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.achievement {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.achievement-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 4rem 2rem;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 2rem;
  margin-bottom: 2rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* Responsive */
@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .card-header {
    flex-direction: column;
  }

  .card-date {
    white-space: normal;
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}