:root {
  --bg: #0b1120;
  --surface: #111a2e;
  --border: #1f2c47;
  --text: #dbe4f3;
  --muted: #8b9ab5;
  --accent: #38d6a8;
  --accent-dim: rgba(56, 214, 168, 0.12);
  --sans: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

#topology {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.55;
}

a { color: inherit; text-decoration: none; }
.mono { font-family: var(--mono); }
.accent { color: var(--accent); }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem clamp(1rem, 5vw, 3rem);
  background: rgba(11, 17, 32, 0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.logo { display: flex; align-items: center; gap: 0.65rem; }
.logo-mark {
  width: 38px;
  height: 28px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  overflow: visible;
}
.logo-mark circle { fill: var(--bg); transition: fill 0.2s; }
.logo:hover .logo-mark circle { fill: var(--accent); }
.logo-text { font-family: "Sora", var(--sans); font-size: 1rem; font-weight: 600; letter-spacing: -0.01em; }

@media (max-width: 480px) {
  .logo-text { display: none; }
}
.nav nav { display: flex; gap: 1.5rem; }
.nav nav a { color: var(--muted); font-size: 0.95rem; transition: color 0.2s; }
.nav nav a:hover { color: var(--accent); }

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 3rem);
}

/* Hero */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
}
.kicker { color: var(--accent); font-size: 0.9rem; margin-bottom: 1rem; }
.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.tagline {
  font-size: clamp(1.15rem, 3vw, 1.6rem);
  color: var(--muted);
  margin-top: 0.5rem;
}
.arrow { color: var(--accent); }
.lede { max-width: 560px; margin-top: 1.5rem; color: var(--muted); }
.cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.btn {
  display: inline-block;
  padding: 0.7rem 1.3rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.9rem;
  transition: background 0.2s;
}
.btn:hover { background: var(--accent-dim); }
.btn.primary { background: var(--accent); color: var(--bg); }
.btn.primary:hover { background: #5ee6bd; }

/* Sections */
.section { padding: 5rem 0; }
.section h2 {
  font-size: 1.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 2rem;
}
.section h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
  margin-left: 1rem;
}
.num { color: var(--accent); font-size: 1.1rem; font-weight: 400; }

.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.5rem;
}
.about-grid p { color: var(--muted); margin-bottom: 1rem; }
.skills h3 { font-size: 0.85rem; color: var(--accent); font-weight: 500; margin-bottom: 0.6rem; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.tags li {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
}

/* Projects */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: transform 0.2s, border-color 0.2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card .label { font-family: var(--mono); font-size: 0.75rem; color: var(--accent); margin-bottom: 0.5rem; }
.card h3 { font-size: 1.2rem; margin-bottom: 0.6rem; }
.card p { color: var(--muted); font-size: 0.95rem; flex: 1; }
.card .tags { margin: 1rem 0 0; }
.card .tags li { font-size: 0.72rem; }
.card .card-links { display: flex; gap: 1rem; margin-top: 1rem; font-family: var(--mono); font-size: 0.85rem; }
.card .card-links a { color: var(--accent); }
.card .card-links a:hover { text-decoration: underline; }

.contact { text-align: center; }
.contact h2::after { display: none; }
.contact h2 { justify-content: center; }
.contact p { color: var(--muted); margin-bottom: 2rem; }
.links { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.75rem; }

.footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; }
  .nav nav { gap: 1rem; }
  .section { padding: 3.5rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card { transition: none; }
}