:root {
  --bg: #0b0e14;
  --bg-alt: #10141d;
  --panel: #151a24;
  --line: #232a37;
  --txt: #e6e9ef;
  --muted: #97a0b0;
  --accent: #5eead4;
  --accent-2: #818cf8;
  --str: #a5d6a7;
  --radius: 16px;
  --max: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Space Grotesk", system-ui, sans-serif;
  background: var(--bg);
  color: var(--txt);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.mono { font-family: "JetBrains Mono", monospace; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

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

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

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  background: rgba(11, 14, 20, 0.6);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-color: var(--line); background: rgba(11, 14, 20, 0.85); }
.brand { font-weight: 700; font-size: 1.15rem; display: flex; align-items: center; gap: 8px; }
.brand-mark { color: var(--accent); font-family: "JetBrains Mono", monospace; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--muted); font-size: .95rem; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--txt); }
.nav-cta {
  background: var(--accent); color: #06231f !important; padding: 8px 18px;
  border-radius: 999px; font-weight: 600;
}
.nav-cta:hover { background: #7ff3e1; }
.nav-toggle { display: none; background: none; border: none; color: var(--txt); font-size: 1.5rem; cursor: pointer; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(600px 400px at 75% 20%, rgba(129, 140, 248, .22), transparent 60%),
    radial-gradient(500px 400px at 15% 80%, rgba(94, 234, 212, .16), transparent 60%);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px; opacity: .15;
  mask-image: radial-gradient(circle at 50% 40%, #000 30%, transparent 80%);
}
.hero-inner { position: relative; z-index: 1; padding-top: 100px; padding-bottom: 60px; }
.eyebrow { color: var(--muted); font-size: 1.05rem; margin-bottom: 12px; }
.hero h1 { font-size: clamp(2.6rem, 8vw, 5rem); line-height: 1.05; font-weight: 700; letter-spacing: -1px; }
.role { font-family: "JetBrains Mono", monospace; color: var(--muted); font-size: clamp(1rem, 3vw, 1.4rem); margin: 18px 0 22px; }
.role .mono { color: var(--accent-2); }
.role .str { color: var(--str); }
.lead { max-width: 620px; color: var(--muted); font-size: 1.12rem; }
.lead strong { color: var(--txt); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 32px 0 28px; }
.btn { display: inline-block; padding: 14px 26px; border-radius: 999px; font-weight: 600; font-size: 1rem; transition: transform .15s, background .2s, border-color .2s; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #06231f; }
.btn-primary:hover { background: #7ff3e1; }
.btn-ghost { border: 1px solid var(--line); color: var(--txt); }
.btn-ghost:hover { border-color: var(--accent); }
.hero-badges { display: flex; flex-wrap: wrap; gap: 12px; }
.badge { font-size: .85rem; color: var(--muted); background: var(--panel); border: 1px solid var(--line); padding: 6px 14px; border-radius: 999px; }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.kicker { font-family: "JetBrains Mono", monospace; color: var(--accent); font-size: .9rem; letter-spacing: 1px; margin-bottom: 12px; }
.section h2 { font-size: clamp(1.8rem, 5vw, 2.6rem); letter-spacing: -.5px; margin-bottom: 22px; }
.section p { color: var(--muted); max-width: 640px; margin-bottom: 16px; }
.section p strong { color: var(--txt); }

/* About */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-card { min-width: 0; }
.term { background: #0d1017; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: 0 30px 60px -30px rgba(0,0,0,.7); }
.term-bar { display: flex; gap: 8px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.term-bar span { width: 12px; height: 12px; border-radius: 50%; background: #2a3242; }
.term-bar span:nth-child(1){ background:#ff5f56; } .term-bar span:nth-child(2){ background:#ffbd2e; } .term-bar span:nth-child(3){ background:#27c93f; }
.term-body { padding: 22px; font-family: "JetBrains Mono", monospace; font-size: .92rem; line-height: 1.9; overflow-x: auto; color: #cdd3de; }
.term-body .cmt { color: #5b6675; } .term-body .kw { color: var(--accent-2); } .term-body .str { color: var(--str); } .term-body .bool { color: #f0a35e; }

/* Skills */
.skills { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 40px; margin: 32px 0 56px; }
.skill-head { display: flex; justify-content: space-between; margin-bottom: 8px; font-weight: 500; }
.skill-head em { font-style: normal; color: var(--muted); font-family: "JetBrains Mono", monospace; font-size: .85rem; }
.bar { height: 8px; background: var(--panel); border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width 1.1s cubic-bezier(.2,.8,.2,1); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; transition: transform .2s, border-color .2s; }
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-ico { font-size: 1.8rem; margin-bottom: 14px; }
.card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card p { font-size: .95rem; margin: 0; }

/* Certificate */
.cert-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.cert-visual { display: flex; justify-content: center; }
.cert-card {
  width: 100%; max-width: 360px; aspect-ratio: 4 / 3;
  background: linear-gradient(145deg, #151a24, #0d1017);
  border: 1px solid var(--line); border-radius: 20px;
  padding: 30px; text-align: center; position: relative;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  box-shadow: 0 30px 60px -30px rgba(94,234,212,.25);
}
.cert-seal {
  width: 78px; height: 78px; border-radius: 50%;
  background: radial-gradient(circle, var(--accent), var(--accent-2));
  color: #06231f; font-weight: 700; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; box-shadow: 0 0 0 6px rgba(94,234,212,.12);
}
.cert-name { font-size: 1.3rem; font-weight: 700; }
.cert-sub { color: var(--muted); font-size: .9rem; margin-top: 4px; }
.cert-line { width: 60px; height: 3px; background: var(--accent); border-radius: 3px; margin: 16px 0; }
.cert-note { color: var(--accent); font-size: .85rem; font-family: "JetBrains Mono", monospace; }
.cert-list { list-style: none; margin-top: 20px; }
.cert-list li { color: var(--muted); padding: 8px 0 8px 28px; position: relative; }
.cert-list li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* Contact */
.contact-lead { font-size: 1.1rem; }
.contact-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 32px; }
.contact-item { display: flex; align-items: center; gap: 14px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; transition: transform .2s, border-color .2s; }
.contact-item:hover { transform: translateY(-4px); border-color: var(--accent); }
.ci-ico { font-size: 1.5rem; }
.contact-item em { display: block; font-style: normal; color: var(--muted); font-size: .8rem; margin-bottom: 2px; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 28px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: .9rem; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: flex-start; gap: 18px;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg-alt); border-bottom: 1px solid var(--line); padding: 24px;
  }
  .nav-toggle { display: block; }
  .about-grid, .cert-grid { grid-template-columns: 1fr; gap: 32px; }
  .skills { grid-template-columns: 1fr; }
  .cards, .contact-links { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
}