:root {
  --bg: #0b1018;
  --bg-2: #0f1622;
  --card: #131c2a;
  --line: rgba(226, 232, 244, .1);
  --text: #e8edf6;
  --muted: #98a3b8;
  --accent: #ffb454;
  --accent-ink: #1a1204;
  --accent-2: #7c9cff;
  --glow: rgba(255, 180, 84, .16);
  --display: "Space Grotesk", system-ui, sans-serif;
  --sans: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 16px;
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #f6f4ef;
  --bg-2: #efece4;
  --card: #ffffff;
  --line: rgba(20, 28, 44, .12);
  --text: #141c2c;
  --muted: #566074;
  --accent: #c25e00;
  --accent-ink: #ffffff;
  --accent-2: #3b4fd8;
  --glow: rgba(194, 94, 0, .12);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
img, svg { max-width: 100%; }
.wrap { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.mono { font-family: var(--mono); }
.skip { position: absolute; left: 1rem; top: -4rem; background: var(--accent); color: var(--accent-ink); padding: .6rem 1rem; border-radius: 8px; z-index: 20; }
.skip:focus { top: 1rem; }

/* ---------- header ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .65rem; font: 700 1.05rem var(--display); letter-spacing: -.01em; }
.brand-mark { width: 34px; height: 34px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font: 700 .95rem var(--display); }
.nav-links { display: flex; align-items: center; gap: .25rem; }
.nav-links a { padding: .45rem .8rem; border-radius: 999px; color: var(--muted); font-size: .92rem; transition: color .2s, background .2s; }
.nav-links a:hover, .nav-links a[aria-current="true"] { color: var(--text); background: var(--line); }
.icon-btn { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line); background: transparent; color: var(--text); cursor: pointer; display: grid; place-items: center; }
.icon-btn:hover { border-color: var(--accent); }
.menu-btn { display: none; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .8rem 1.3rem; border-radius: 999px; font-weight: 600; font-size: .95rem; border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .2s, border-color .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 8px 28px var(--glow); }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); }

/* ---------- hero ---------- */
.hero { padding: clamp(3rem, 8vw, 6.5rem) 0 4rem; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; width: 640px; height: 640px; right: -180px; top: -200px; background: radial-gradient(circle, var(--glow), transparent 65%); pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: 1.25fr .9fr; gap: 3rem; align-items: center; position: relative; }
.eyebrow { display: inline-flex; align-items: center; gap: .6rem; font: 500 .8rem var(--mono); color: var(--accent); text-transform: uppercase; letter-spacing: .08em; }
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 4px rgba(74, 222, 128, .2); }
h1 { font: 700 clamp(2.6rem, 6.5vw, 4.9rem)/1.02 var(--display); letter-spacing: -.035em; margin: 1rem 0 1.2rem; }
h1 .grad { background: linear-gradient(100deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 34rem; margin: 0 0 2rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: .8rem; }
.code-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .5); overflow: hidden; }
.code-bar { display: flex; gap: 6px; padding: .8rem 1rem; border-bottom: 1px solid var(--line); background: var(--bg-2); align-items: center; }
.code-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.code-bar span { margin-left: .6rem; font: 400 .75rem var(--mono); color: var(--muted); }
.code-card pre { margin: 0; padding: 1.2rem 1.3rem; font: 400 .84rem/1.8 var(--mono); overflow-x: auto; color: var(--text); }
.k { color: var(--accent-2); } .s { color: var(--accent); } .c { color: var(--muted); }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-top: 4rem; }
.stat { background: var(--card); padding: 1.4rem 1.2rem; }
.stat b { display: block; font: 700 2.1rem/1.1 var(--display); letter-spacing: -.02em; }
.stat span { color: var(--muted); font-size: .86rem; }

/* ---------- sections ---------- */
section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.sec-head { display: flex; align-items: end; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.4rem; }
.sec-head .eyebrow { margin-bottom: .5rem; }
h2 { font: 700 clamp(1.9rem, 4vw, 2.9rem)/1.1 var(--display); letter-spacing: -.03em; margin: 0; }
h3 { font: 600 1.15rem var(--display); margin: 0; letter-spacing: -.01em; }
.alt { background: var(--bg-2); border-block: 1px solid var(--line); }

.about { display: grid; grid-template-columns: 1fr 1.3fr; gap: 3rem; }
.about p { color: var(--muted); margin: 0 0 1rem; }
.about p:first-child { color: var(--text); font-size: 1.2rem; }

/* skills */
.skills { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
.skill-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem; }
.skill-card h3 { font-size: .8rem; font-family: var(--mono); font-weight: 500; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin-bottom: .8rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip { font: 500 .78rem var(--sans); padding: .3rem .7rem; border-radius: 999px; background: var(--bg-2); border: 1px solid var(--line); color: var(--text); }

/* projects */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; }
.filter { font: 500 .85rem var(--sans); padding: .45rem 1rem; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--muted); cursor: pointer; text-transform: capitalize; }
.filter[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.projects { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.2rem; }
.project { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; display: flex; flex-direction: column; gap: .9rem; transition: transform .2s, border-color .2s, box-shadow .2s; position: relative; }
.project:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 24px 40px -28px var(--glow); }
.project.featured { grid-column: 1 / -1; background: linear-gradient(135deg, var(--card), var(--bg-2)); }
.project .meta { display: flex; justify-content: space-between; font: 500 .72rem var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.project .badge { color: var(--accent); }
.project p { margin: 0; color: var(--muted); font-size: .95rem; flex: 1; }
.project .links { display: flex; gap: 1.2rem; font-weight: 600; font-size: .9rem; }
.project .links a { color: var(--accent); }
.project .links a:hover { text-decoration: underline; text-underline-offset: 4px; }
.project[hidden] { display: none; }
.empty-hint { color: var(--muted); font-size: .9rem; margin-top: 1.5rem; }

/* timeline */
.timeline { display: grid; gap: 1.2rem; }
.job { display: grid; grid-template-columns: 200px 1fr; gap: 2rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem; }
.job-meta .period { font: 500 .8rem var(--mono); color: var(--accent); }
.job-meta .place { color: var(--muted); font-size: .88rem; margin-top: .3rem; }
.job h3 { font-size: 1.3rem; }
.job .co { color: var(--muted); margin: .2rem 0 1rem; }
ul.pts { margin: 0; padding-left: 1.1rem; color: var(--muted); display: grid; gap: .45rem; font-size: .95rem; }
ul.pts li::marker { color: var(--accent); }
.tracks { margin-top: 1.5rem; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.track { border: 1px solid var(--line); border-radius: 12px; padding: 1.1rem; background: var(--bg-2); }
.track h4 { margin: 0 0 .6rem; font: 600 .95rem var(--display); }
.track ul.pts { font-size: .86rem; }
.edu { display: grid; gap: 1rem; margin-top: 1.2rem; }
.edu .job { grid-template-columns: 200px 1fr; }

/* contact */
.contact-box { text-align: center; padding: clamp(2.5rem, 6vw, 4.5rem) 1.5rem; border: 1px solid var(--line); border-radius: 24px; background: radial-gradient(ellipse at top, var(--glow), transparent 60%), var(--card); }
.contact-box h2 { margin-bottom: 1rem; }
.contact-box p { color: var(--muted); max-width: 32rem; margin: 0 auto 2rem; }
.contact-box .cta-row { justify-content: center; }

footer { border-top: 1px solid var(--line); padding: 2rem 0; color: var(--muted); font-size: .88rem; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero-grid, .about { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .job, .edu .job { grid-template-columns: 1fr; gap: .6rem; }
  .menu-btn { display: grid; }
  .nav-links { position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--bg); border-bottom: 1px solid var(--line); padding: .6rem 20px 1rem; display: none; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .8rem; }
}

/* ======================= resume page ======================= */
.resume-bar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1rem 0; flex-wrap: wrap; }
.paper { max-width: 860px; margin: 1rem auto 4rem; background: #fff; color: #141c2c; border-radius: 12px; padding: clamp(1.5rem, 5vw, 3.2rem); box-shadow: 0 30px 70px -30px rgba(0, 0, 0, .5); }
.paper h1 { font-size: 2.5rem; margin: 0; letter-spacing: -.03em; color: #141c2c; }
.paper .role { font: 600 1.05rem var(--display); color: #b45309; margin: .3rem 0 .7rem; }
.paper .contacts { display: flex; flex-wrap: wrap; gap: .3rem 1.2rem; font-size: .88rem; color: #566074; padding-bottom: 1rem; border-bottom: 2px solid #141c2c; }
.paper .contacts a { color: #1d4ed8; }
.paper h2 { font: 700 .85rem var(--mono); text-transform: uppercase; letter-spacing: .12em; color: #141c2c; margin: 1.6rem 0 .7rem; padding-bottom: .3rem; border-bottom: 1px solid #d8dce5; }
.paper p, .paper li { font-size: .92rem; color: #2b3447; }
.paper .r-job { margin-bottom: 1.1rem; break-inside: avoid; }
.paper .r-head { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-weight: 700; font-size: 1rem; color: #141c2c; }
.paper .r-head span:last-child { font: 500 .85rem var(--mono); color: #566074; }
.paper .r-sub { font-size: .86rem; color: #566074; margin-bottom: .4rem; }
.paper h4 { margin: .8rem 0 .3rem; font-size: .92rem; color: #141c2c; }
.paper ul { margin: .2rem 0 0; padding-left: 1.1rem; display: grid; gap: .25rem; }
.paper li::marker { color: #b45309; }
.paper .r-skill { font-size: .88rem; margin: 0 0 .35rem; color: #2b3447; }
.paper .r-skill b { color: #141c2c; }

@media print {
  @page { margin: 12mm; }
  body { background: #fff; }
  .nav, .resume-bar, footer, .skip { display: none !important; }
  .paper { box-shadow: none; border-radius: 0; margin: 0; padding: 0; max-width: none; }
  .paper a { color: inherit; }
}