/* ============================================================
   JOOYEONG KWAG — résumé site
   Direction C "The Statement", elevated to hi-fi.
   Palette + type carried over from the wireframe tokens.
   ============================================================ */

:root{
  --paper:#f4f2ec;
  --card:#faf9f5;
  --ink:#17150f;
  --muted:#8c877c;
  --faint:#bdb8ac;
  --line:rgba(23,21,15,.16);
  --line-strong:rgba(23,21,15,.9);
  --orange:#e85d18;
  --mono:'Space Mono', ui-monospace, Menlo, monospace;
  --sans:'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --pad:clamp(22px, 5vw, 64px);
  --maxw:1080px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3{ font-weight:700; letter-spacing:-.025em; line-height:1.02; }
em{ font-style:italic; }
a{ color:inherit; text-decoration:none; }

/* shared bits */
.eyebrow{
  font-family:var(--mono); font-size:11px; font-weight:400;
  letter-spacing:.18em; text-transform:uppercase; color:var(--muted);
}
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:13px; letter-spacing:.03em;
  border:1.5px solid var(--ink); border-radius:10px; padding:12px 20px;
  color:var(--ink); background:transparent;
  transition:transform .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
}
.btn:hover{ transform:translateY(-2px); }
.btn--solid{ background:var(--ink); color:var(--paper); }
.btn--solid:hover{ background:#000; }
.btn--acc{ background:var(--orange); border-color:var(--orange); color:#fff; }
.btn--acc:hover{ background:#cf4f10; }

.chip{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:12px; letter-spacing:.02em; color:var(--ink);
  border:1.5px solid var(--line); border-radius:22px; padding:8px 15px; background:var(--card);
}
.chip-dot{ width:6px; height:6px; border-radius:50%; background:var(--orange); }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:60;
  display:flex; align-items:center; justify-content:space-between;
  padding:16px var(--pad);
  background:color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1.5px solid var(--line);
}
.brand{ font-weight:700; letter-spacing:-.02em; font-size:15px; }
.nav{ display:flex; align-items:center; gap:clamp(14px, 2.2vw, 30px); }
.nav a{ font-family:var(--mono); font-size:12px; letter-spacing:.04em; color:var(--muted); transition:color .2s; }
.nav a:hover{ color:var(--ink); }
.nav-cta{ color:var(--ink) !important; border:1.5px solid var(--line); border-radius:8px; padding:8px 13px; transition:border-color .2s, background .2s; }
.nav-cta:hover{ border-color:var(--ink); background:var(--ink); color:var(--paper) !important; }
.nav-toggle{ display:none; }

/* ---------- Section scaffolding ---------- */
main > section, .contact{
  max-width:var(--maxw); margin:0 auto;
  padding:clamp(56px, 9vw, 120px) var(--pad);
}
.sec-head{ display:flex; align-items:baseline; justify-content:space-between; gap:20px; margin-bottom:clamp(24px,4vw,44px); }
.sec-meta{ font-family:var(--mono); font-size:12px; color:var(--muted); }

/* ---------- Hero ---------- */
.hero{ text-align:center; padding-top:clamp(60px,11vw,140px); padding-bottom:clamp(40px,6vw,70px); }
.hero .eyebrow{ display:block; margin-bottom:26px; }
.hero-title{ font-size:clamp(40px, 7.6vw, 92px); letter-spacing:-.04em; line-height:.98; max-width:15ch; margin:0 auto; }
.hero-title em{ color:var(--orange); }
.hero-sub{ max-width:54ch; margin:30px auto 0; color:var(--muted); font-size:clamp(16px,1.5vw,19px); }
.hero-cta{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-top:36px; }

/* ---------- Metric grid ---------- */
.metrics{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:1.5px; background:var(--line);
  border:1.5px solid var(--ink); border-radius:14px; overflow:hidden;
  padding:0 !important; /* override section padding */
  margin-top:0;
}
/* re-apply outer margins lost by padding override */
.metrics{ max-width:var(--maxw); margin-inline:auto; margin-bottom:0; }
.metric{ background:var(--card); padding:clamp(26px,3.4vw,42px) clamp(18px,2.2vw,28px); text-align:center; }
.metric b{ display:block; font-size:clamp(34px,4.6vw,58px); font-weight:700; letter-spacing:-.04em; line-height:1; font-variant-numeric:tabular-nums; }
.metric span{ display:block; margin-top:12px; font-family:var(--mono); font-size:11px; line-height:1.5; letter-spacing:.04em; text-transform:uppercase; color:var(--muted); }

/* ---------- About ---------- */
.about .eyebrow{ display:block; margin-bottom:28px; }
.about-grid{ display:grid; grid-template-columns:1.5fr 1fr; gap:clamp(30px,5vw,70px); align-items:start; }
.about-body p{ font-size:clamp(18px,2vw,24px); line-height:1.5; letter-spacing:-.01em; }
.about-body p + p{ margin-top:1em; color:var(--muted); }
.strengths{ list-style:none; border-top:1.5px solid var(--line); }
.strengths li{ display:flex; gap:14px; align-items:baseline; padding:18px 0; border-bottom:1.5px solid var(--line); font-size:18px; font-weight:600; letter-spacing:-.01em; }
.s-no{ font-family:var(--mono); font-size:12px; font-weight:400; color:var(--orange); }

/* ---------- Experience timeline ---------- */
.timeline{ list-style:none; }
.tl-row{ display:grid; grid-template-columns:130px 1fr; gap:clamp(20px,4vw,44px); padding:clamp(22px,3vw,34px) 0; border-top:1.5px solid var(--line); }
.tl-row:last-child{ border-bottom:1.5px solid var(--line); }
.tl-year{ font-family:var(--mono); font-size:13px; color:var(--muted); padding-top:5px; }
.tl-body h3{ font-size:clamp(20px,2.6vw,28px); }
.tl-co{ font-family:var(--mono); font-size:13px; color:var(--orange); margin-top:7px; letter-spacing:.02em; }
.tl-desc{ margin-top:12px; max-width:60ch; color:var(--muted); font-size:16px; }

/* ---------- Achievements ---------- */
.achievements .eyebrow{ display:block; margin-bottom:28px; }
.ach-grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(18px,2.4vw,26px); }
.ach-card{ position:relative; border:1.5px solid var(--line); border-radius:14px; padding:clamp(24px,3vw,36px); background:var(--card); transition:border-color .3s var(--ease), transform .3s var(--ease); }
.ach-card:hover{ border-color:var(--ink); transform:translateY(-3px); }
.ach-no{ font-family:var(--mono); font-size:12px; color:var(--orange); }
.ach-card h3{ font-size:clamp(20px,2.4vw,26px); margin:14px 0 12px; }
.ach-card p{ color:var(--muted); font-size:16px; }

/* ---------- Toolkit + Education ---------- */
.toolkit{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(30px,5vw,70px); border-top:1.5px solid var(--line); }
.tk-col .eyebrow{ display:block; margin-bottom:18px; }
.chips{ display:flex; flex-wrap:wrap; gap:9px; }
.edu{ padding:14px 0; border-bottom:1.5px solid var(--line); }
.edu:first-of-type{ border-top:1.5px solid var(--line); }
.edu h3{ font-size:19px; }
.edu-meta{ font-family:var(--mono); font-size:12px; color:var(--muted); margin-top:6px; }

/* ---------- Contact / footer ---------- */
.contact{ text-align:center; border-top:1.5px solid var(--ink); }
.contact .eyebrow{ display:block; margin-bottom:22px; }
.contact-title{ font-size:clamp(34px,6vw,72px); letter-spacing:-.04em; }
.contact-title em{ color:var(--orange); }
.contact-cta{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-top:34px; }
.contact-meta{ display:flex; gap:clamp(14px,3vw,30px); justify-content:center; flex-wrap:wrap; margin-top:40px; font-family:var(--mono); font-size:13px; color:var(--muted); }
.contact-meta a:hover{ color:var(--ink); }
.colophon{ font-family:var(--mono); font-size:11px; color:var(--faint); margin-top:46px; letter-spacing:.04em; }

/* ---------- Reveal animation ---------- */
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in{ opacity:1; transform:none; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .reveal{ opacity:1 !important; transform:none !important; transition:none; }
  .btn, .ach-card{ transition:none; }
}

/* ---------- Responsive ---------- */
@media (max-width:860px){
  .metrics{ grid-template-columns:repeat(2,1fr); }
  .about-grid{ grid-template-columns:1fr; gap:34px; }
  .ach-grid{ grid-template-columns:1fr; }
  .toolkit{ grid-template-columns:1fr; gap:40px; }
}
@media (max-width:620px){
  .nav{ position:fixed; inset:60px 0 auto 0; flex-direction:column; align-items:flex-start; gap:0;
    background:var(--paper); border-bottom:1.5px solid var(--line); padding:8px var(--pad) 18px;
    transform:translateY(-130%); transition:transform .35s var(--ease); }
  .nav.open{ transform:none; }
  .nav a{ width:100%; padding:13px 0; font-size:14px; border-bottom:1px solid var(--line); }
  .nav-cta{ border:1.5px solid var(--line) !important; width:auto; margin-top:12px; padding:10px 16px; }
  .nav-toggle{ display:inline-flex; flex-direction:column; gap:5px; width:34px; height:34px; align-items:center; justify-content:center;
    background:none; border:1.5px solid var(--line); border-radius:8px; cursor:pointer; }
  .nav-toggle span{ width:16px; height:1.6px; background:var(--ink); transition:.25s var(--ease); }
  .nav-toggle[aria-expanded="true"] span:first-child{ transform:translateY(3.3px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child{ transform:translateY(-3.3px) rotate(-45deg); }
  .tl-row{ grid-template-columns:1fr; gap:8px; }
  .tl-year{ padding-top:0; }
}