:root {
  --bg: #0b1220;
  --bg-2: #0f172a;
  --card: #111a2e;
  --border: #1f2a44;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #34d399;
  --accent-2: #38bdf8;
  --danger: #f87171;
  --radius: 12px;
  --mono: 'JetBrains Mono', ui-monospace, Consolas, monospace;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, #12324a 0%, transparent 60%), var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--sans);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 5vw, 64px);
  background: rgba(11, 18, 32, .85); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { color: var(--text); font-weight: 700; font-family: var(--mono); }
.brand .prompt { color: var(--accent); }
.nav nav { display: flex; gap: 22px; }
.nav nav a { color: var(--muted); font-size: 14px; }
.nav nav a:hover { color: var(--accent); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 4px 10px; font-size: 18px; cursor: pointer; }

main { max-width: 1100px; margin: 0 auto; padding: 0 clamp(16px, 5vw, 48px); }
.banner { margin: 24px 0; padding: 14px 18px; border: 1px solid var(--danger); border-radius: var(--radius); color: var(--danger); }

/* Hero */
.hero {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center;
  min-height: calc(100vh - 64px); padding: 48px 0;
}
.eyebrow { color: var(--accent); font-family: var(--mono); margin: 0; }
h1 { font-size: clamp(40px, 6vw, 68px); line-height: 1.05; margin: 8px 0 16px; letter-spacing: -0.02em; }
.headline { color: var(--muted); font-size: 19px; margin: 0 0 28px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 10px;
  border: 1px solid var(--border); color: var(--text); background: var(--bg-2);
  font: 600 15px var(--sans); cursor: pointer; transition: transform .15s, border-color .15s;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #052e1f; }
.btn:disabled { opacity: .6; cursor: wait; }

/* Terminal */
.terminal {
  background: #060b16; border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .45); font-family: var(--mono); font-size: 14px; overflow: hidden;
}
.term-bar { display: flex; align-items: center; gap: 7px; padding: 10px 14px; background: #0d1526; border-bottom: 1px solid var(--border); }
.term-bar span { width: 11px; height: 11px; border-radius: 50%; background: #f87171; }
.term-bar span:nth-child(2) { background: #fbbf24; }
.term-bar span:nth-child(3) { background: #34d399; }
.term-bar em { margin-left: 10px; color: var(--muted); font-style: normal; font-size: 12px; }
.term-body { height: 300px; overflow-y: auto; padding: 14px 16px 4px; white-space: pre-wrap; word-break: break-word; }
.term-body .cmd { color: var(--accent-2); }
.term-body .ok { color: var(--accent); }
.term-body .err { color: var(--danger); }
.term-body .dim { color: var(--muted); }
.term-input { display: flex; gap: 8px; padding: 8px 16px 14px; }
.term-input label { color: var(--accent); white-space: nowrap; }
.term-input input { flex: 1; min-width: 0; background: transparent; border: 0; outline: 0; color: var(--text); font: inherit; caret-color: var(--accent); }

/* Sections */
.section { padding: 80px 0 24px; }
h2 { font-size: 28px; margin: 0 0 28px; display: flex; align-items: center; gap: 12px; }
h2::after { content: ''; flex: 1; height: 1px; background: var(--border); max-width: 320px; }
.num { color: var(--accent); font-family: var(--mono); font-size: 20px; }
.lead { color: #cbd5e1; font-size: 18px; max-width: 760px; }
.facts { list-style: none; padding: 0; display: flex; gap: 16px; flex-wrap: wrap; margin-top: 28px; }
.facts li { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 20px; color: var(--muted); }
.facts strong { display: block; color: var(--text); font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }

/* Skills */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.chip { background: var(--bg-2); color: var(--muted); border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; font: 500 14px var(--sans); cursor: pointer; }
.chip:hover { color: var(--text); }
.chip.active { background: var(--accent); color: #052e1f; border-color: var(--accent); }
.skill-grid { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 10px; }
.skill { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; display: flex; flex-direction: column; transition: opacity .2s, transform .2s; }
.skill small { color: var(--muted); font-family: var(--mono); font-size: 11px; }
.skill.hidden { display: none; }

/* Timeline */
.timeline { list-style: none; padding: 0 0 0 24px; margin: 0; border-left: 2px solid var(--border); }
.tl-item { position: relative; padding: 0 0 36px 18px; }
.tl-item::before { content: ''; position: absolute; left: -32px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--bg); }
.tl-item.work::before { background: var(--accent-2); }
.tl-meta { display: flex; gap: 12px; align-items: center; color: var(--muted); font-size: 14px; font-family: var(--mono); }
.tag { border: 1px solid var(--border); border-radius: 6px; padding: 1px 8px; font-size: 12px; }
.tl-item h3 { margin: 6px 0 2px; font-size: 20px; }
.org { color: var(--accent); margin: 0 0 8px; }
.tl-item ul { margin: 0; padding-left: 18px; color: #cbd5e1; }

/* Coursework */
.stats strong { font-size: 28px; text-transform: none; letter-spacing: 0; color: var(--accent); font-family: var(--mono); }
.course-area { margin-top: 32px; }
.area-title { font-size: 18px; margin: 0 0 12px; display: flex; align-items: baseline; gap: 10px; }
.area-title small { color: var(--muted); font: 400 13px var(--mono); }
.course-list { display: grid; gap: 8px; }
.course { background: var(--card); border: 1px solid var(--border); border-radius: 10px; transition: border-color .2s; }
.course[open], .course:hover { border-color: var(--accent); }
.course summary {
  display: grid; grid-template-columns: 90px 1fr auto; gap: 14px; align-items: center;
  padding: 12px 16px; cursor: pointer; list-style: none;
}
.course summary::-webkit-details-marker { display: none; }
.course summary::after { content: '+'; grid-column: 4; color: var(--accent); font-family: var(--mono); }
.course[open] summary::after { content: '−'; }
.code { font-family: var(--mono); color: var(--accent-2); font-size: 14px; }
.ctitle { font-weight: 600; }
.term { color: var(--muted); font: 13px var(--mono); white-space: nowrap; }
.course-body { padding: 0 16px 16px 120px; color: #cbd5e1; }
.course-body p { margin: 0 0 10px; }
.topics { margin: 0; padding-left: 18px; columns: 2 280px; column-gap: 32px; }
.topics li { break-inside: avoid; margin-bottom: 4px; }

/* Cards */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; transition: border-color .2s, transform .2s; }
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { color: #cbd5e1; margin: 0 0 12px; }
.card time { color: var(--muted); font-family: var(--mono); font-size: 13px; }
.cert-icon { width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; background: rgba(52, 211, 153, .12); color: var(--accent); margin-bottom: 12px; font-weight: 700; }
.tags { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tags li { font-family: var(--mono); font-size: 12px; color: var(--accent-2); background: rgba(56, 189, 248, .1); border-radius: 6px; padding: 2px 8px; }
.link { display: inline-block; margin-top: 12px; }

.how { margin-top: 28px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 22px; }
.how summary { cursor: pointer; font-weight: 600; color: var(--accent); }
.how ul { color: #cbd5e1; margin: 14px 0 0; }
.how li { margin-bottom: 6px; }

/* Resume viewer */
.resume-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.resume-panel { margin-top: 24px; }
.resume-panel iframe {
  display: block; width: 100%; max-width: 900px; aspect-ratio: 8.5 / 11; height: auto;
  border: 1px solid var(--border); border-radius: var(--radius); background: #525659;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .45);
}
.resume-fallback { color: var(--muted); font-size: 14px; margin: 12px 0 0; }

/* Contact */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-links { list-style: none; padding: 0; }
.contact-links li { margin-bottom: 8px; font-family: var(--mono); }
.contact-form { display: grid; gap: 14px; }
.contact-form label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.contact-form input, .contact-form textarea {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); padding: 11px 13px; font: 15px var(--sans); resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.contact-form .invalid { border-color: var(--danger); }
.field-error { color: var(--danger); font-size: 13px; }
.form-status { margin: 0; min-height: 1.5em; }
.form-status.ok { color: var(--accent); }
.form-status.err { color: var(--danger); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.footer { text-align: center; color: var(--muted); font-size: 14px; padding: 60px 16px 40px; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Mobile */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; min-height: auto; gap: 32px; }
  .contact-wrap { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .nav nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--bg); border-bottom: 1px solid var(--border); }
  .nav nav.open { display: flex; }
  .nav nav a { padding: 14px 16px; border-top: 1px solid var(--border); }
  .term-body { height: 240px; }
  .course summary { grid-template-columns: 1fr auto; gap: 2px 12px; }
  .course summary .code { grid-column: 1; }
  .course summary .ctitle { grid-column: 1; grid-row: 2; }
  .course summary .term { grid-column: 1; grid-row: 3; }
  .course summary::after { grid-column: 2; grid-row: 1 / span 3; }
  .course-body { padding-left: 16px; }
}
@media (max-width: 1000px) and (min-width: 861px) { .nav nav { gap: 14px; } }