:root {
  --bg: #0b1020;
  --bg-soft: #131a33;
  --card: #161e3d;
  --line: rgba(148, 163, 255, 0.16);
  --text: #eef1ff;
  --muted: #9aa3c7;
  --accent: #7c8cff;
  --accent-2: #39d0d8;
  --radius: 1rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  background:
    radial-gradient(60rem 30rem at 80% -10%, rgba(124, 140, 255, 0.18), transparent 60%),
    radial-gradient(50rem 26rem at 10% 10%, rgba(57, 208, 216, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ── Nav ─────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem clamp(1rem, 5vw, 3rem);
  background: rgba(11, 16, 32, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.logo {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent-2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s;
}

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

.nav-cta {
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0.45rem 1.1rem;
  color: var(--text) !important;
}

.nav-cta:hover {
  background: var(--accent);
}

/* ── Hero ────────────────────────────────────────────── */
.hero {
  padding: clamp(4rem, 12vw, 7.5rem) 1rem clamp(3rem, 8vw, 5rem);
  text-align: center;
}

.hero-inner {
  max-width: 44rem;
  margin: 0 auto;
}

.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 1rem;
  margin-bottom: 1.25rem;
  background: rgba(57, 208, 216, 0.07);
}

.hero h1 {
  font-size: clamp(2.6rem, 8vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.hero h1 span {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 1.25rem auto 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: clamp(1rem, 2.5vw, 1.15rem);
}

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

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 0.8rem;
  padding: 0.8rem 1.6rem;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(90deg, var(--accent), #5a6df5);
  color: #fff;
  box-shadow: 0 8px 24px rgba(124, 140, 255, 0.35);
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

/* ── Sections ────────────────────────────────────────── */
main section {
  max-width: 60rem;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 0.5rem;
}

.section-tag {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 0.5rem;
}

main h2 {
  font-size: clamp(1.6rem, 4.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-text {
  color: var(--muted);
  max-width: 38rem;
}

/* ── Stats ───────────────────────────────────────────── */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
  margin-top: 1.75rem;
}

.stat {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 900;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat span {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Project grid ────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.card {
  background: linear-gradient(180deg, var(--card), #121838);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform 0.18s, border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 140, 255, 0.45);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.card-tag {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 0.6rem;
}

.card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.card p:last-child {
  color: var(--muted);
  font-size: 0.92rem;
}

/* ── Skills ──────────────────────────────────────────── */
.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.chips li {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: rgba(124, 140, 255, 0.1);
  border: 1px solid var(--line);
}

/* ── Contact ─────────────────────────────────────────── */
.contact {
  text-align: center;
  padding-bottom: 4rem;
}

.contact .section-text {
  margin: 0 auto 1.75rem;
}

/* ── Footer ──────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 1.75rem 1rem 2.25rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links a:not(.nav-cta) {
    display: none;
  }

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

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

  main section {
    padding-top: 2.5rem;
  }
}