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

:root {
  --bg: #0b0b0d;
  --bg-elevated: #141418;
  --bg-card: #18181c;
  --border: #2a2a32;
  --border-subtle: #1f1f26;
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.12);
  --accent-glow: rgba(59, 130, 246, 0.25);
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
  --max-width: 1080px;
  --header-height: 64px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  display: block;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(11, 11, 13, 0.85);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.brand span {
  color: var(--accent);
}

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

.nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text);
}

/* Hero */

.hero {
  position: relative;
  padding: 5rem 0 4.5rem;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-glow {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-title {
  margin: 0.75rem 0 0;
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text-muted);
  font-weight: 500;
}

.hero-tagline {
  margin: 1.25rem 0 0;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn-primary:hover {
  background: #2563eb;
}

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

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

/* Sections */

.section {
  padding: 4rem 0;
}

.section-head {
  margin-bottom: 2rem;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
}

/* Projects */

.projects-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
  box-shadow: var(--shadow);
  transition: border-color 0.2s, transform 0.2s;
}

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

.project-card h3 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.project-card p {
  margin: 0.75rem 0 0;
  flex: 1;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.tag {
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.card-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}

.card-link:hover {
  text-decoration: underline;
}

.card-link-muted {
  color: var(--text-muted);
}

/* Contact */

.section-contact {
  padding-bottom: 5rem;
}

.contact-card {
  display: grid;
  gap: 1.25rem;
  padding: 1.75rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  background: var(--bg-card);
  max-width: 32rem;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.contact-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.contact-item a {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--accent);
}

.contact-item a:hover {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 1.5rem 0 2rem;
}

.footer-inner p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Responsive */

@media (max-width: 640px) {
  .hero {
    padding-top: 3.5rem;
  }

  .nav {
    gap: 1rem;
  }

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