:root{
  --navy:#0B1628;--cobalt:#2563EB;--teal:#0F766E;
  --bg:#FFFFFF;--bg-alt:#F3F6FA;--surface:#FFFFFF;--text:#0B1628;--muted:#44546A;
  --line:#D8E0EA;--accent:#1D4ED8;--accent-2:#0F766E;--on-accent:#FFFFFF;--shadow:0 8px 28px rgba(11,22,40,.08);
  --radius:14px;--maxw:1120px;
}
:root[data-theme="dark"]{
  --bg:#0B1628;--bg-alt:#0F1D33;--surface:#132440;--text:#EAF0F8;--muted:#A9B7CC;
  --line:#243656;--accent:#7AA2FF;--accent-2:#2DD4BF;--on-accent:#0B1628;--shadow:0 8px 28px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR",Roboto,sans-serif;line-height:1.7;font-size:17px;-webkit-text-size-adjust:100%}
img{max-width:100%;display:block}
a{color:var(--accent);text-underline-offset:3px}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px;border-radius:4px}
:root[data-theme="dark"] :focus-visible{outline-color:#9DBBFF}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--navy);color:#fff;padding:10px 16px;border-radius:8px;z-index:100;transition:top .15s}
.skip-link:focus{top:12px}
main:focus{outline:none}

.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-row{display:flex;align-items:center;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:700;margin-right:auto}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--navy);color:#fff;font-size:14px;letter-spacing:.5px}
:root[data-theme="dark"] .brand-mark{background:var(--cobalt)}
.nav ul{display:flex;gap:2px;list-style:none;margin:0;padding:0}
.nav a{display:block;padding:8px 10px;border-radius:8px;color:var(--muted);text-decoration:none;font-size:14.5px;font-weight:600;white-space:nowrap}
.nav a:hover,.nav a.active{color:var(--text);background:var(--bg-alt)}
.nav a.active{box-shadow:inset 0 -2px 0 var(--accent-2)}
.tools{display:flex;align-items:center;gap:8px}
.lang{display:flex;gap:4px}
.chip{font:inherit;font-size:13px;font-weight:700;min-height:40px;min-width:44px;padding:0 10px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer}
.chip[aria-pressed="true"]{background:var(--navy);color:#fff;border-color:var(--navy)}
:root[data-theme="dark"] .chip[aria-pressed="true"]{background:var(--cobalt);border-color:var(--cobalt);color:#fff}
.icon-btn{display:grid;place-items:center;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--text);cursor:pointer}
.icon-btn svg{fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.icon-btn:hover{border-color:var(--accent)}
.i-sun{display:none}
:root[data-theme="dark"] .i-sun{display:inline}
:root[data-theme="dark"] .i-moon{display:none}
.menu-btn{display:none}

.hero{padding:72px 0 48px;background:linear-gradient(180deg,var(--bg-alt),var(--bg))}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow,.kicker{margin:0 0 12px;font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-2)}
h1{margin:0;font-size:clamp(2.4rem,6vw,4rem);line-height:1.1;letter-spacing:-.02em}
.headline{margin:16px 0 0;font-size:clamp(1.15rem,2.4vw,1.5rem);font-weight:600;color:var(--accent);line-height:1.4}
.lead{font-size:1.08rem;color:var(--muted);max-width:60ch}
.hero-text .lead{margin-top:20px}
.portrait-wrap{margin:0;justify-self:end;width:100%;max-width:420px}
.portrait-wrap img{width:100%;height:auto;aspect-ratio:4/5;object-fit:cover;border-radius:24px;box-shadow:var(--shadow);border:1px solid var(--line);background:var(--bg-alt)}
.portrait-wrap.empty{display:none}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--text);font:inherit;font-weight:700;font-size:15px;text-decoration:none;cursor:pointer}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--cobalt);border-color:var(--cobalt);color:#fff}
:root[data-theme="dark"] .btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.about-body{margin-top:56px}
.h-sub{font-size:1.25rem;margin:40px 0 16px}
.about-body .h-sub{margin-top:0}
.prose p{max-width:72ch;margin:0 0 1em;color:var(--text)}

.section{padding:96px 0}
.section.alt{background:var(--bg-alt)}
.sec-head{margin-bottom:36px}
.sec-head h2{margin:0;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.2;letter-spacing:-.01em}
.note{color:var(--muted);font-size:14px;margin-top:20px}

.timeline{list-style:none;margin:0;padding:0 0 0 26px;border-left:2px solid var(--line)}
.tl-item{position:relative;padding:0 0 32px 24px}
.tl-item::before{content:"";position:absolute;left:-34px;top:8px;width:14px;height:14px;border-radius:50%;background:var(--bg);border:3px solid var(--cobalt)}
.tl-item.leadership::before{border-color:var(--accent-2)}
.tl-period{font-size:13px;font-weight:800;letter-spacing:.06em;color:var(--accent-2)}
.tl-item h3{margin:2px 0 0;font-size:1.2rem;line-height:1.4}
.tl-co{margin:0;color:var(--muted);font-weight:600}
.tl-note{margin:8px 0 0;max-width:70ch}
.badge{display:inline-block;margin-left:8px;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700;border:1px solid var(--line);color:var(--muted);vertical-align:middle}

.skill-grid,.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.card-grid.narrow{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px}
.card h3{margin:0;font-size:1.1rem;line-height:1.4}
.card p{margin:0;color:var(--muted);font-size:15.5px}
.card .meta{font-size:13px;font-weight:700;color:var(--accent-2);letter-spacing:.04em}
.card .role{color:var(--text);font-weight:600}
.card .card-link{margin-top:auto;padding-top:8px;font-weight:700}
.tags{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:6px 0 0;padding:0}
.tags li{font-size:12.5px;padding:2px 10px;border-radius:999px;background:var(--bg-alt);border:1px solid var(--line);color:var(--muted)}
.skill-list{margin:4px 0 0;padding-left:18px;color:var(--muted)}
.skill-list li{margin:2px 0}

.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.filters .chip{min-height:44px;padding:0 18px;font-size:14px}

.contact-card{background:var(--navy);color:#EAF0F8;border-radius:20px;padding:40px}
.contact-card .lead{color:#C9D5E6;margin:0}
.contact-card .btn{background:transparent;color:#fff;border-color:#4A6290}
.contact-card .btn.primary{background:var(--cobalt);border-color:var(--cobalt)}
.contact-card .btn:hover{border-color:#fff}
.contact-card :focus-visible{outline-color:#9DBBFF}

.more{margin-top:28px}
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.g-item{padding:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface);cursor:zoom-in;display:block;position:relative}
.g-item img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .3s}
.g-item:hover img{transform:scale(1.04)}
.g-cap{display:block;padding:8px 12px;font-size:13.5px;text-align:left;color:var(--text);font-weight:600}

.lightbox{border:0;padding:0;background:transparent;max-width:min(96vw,1100px);width:100%;color:#fff}
.lightbox::backdrop{background:rgba(5,10,20,.88)}
.lb-inner{position:relative;display:flex;flex-direction:column;align-items:center;gap:12px;padding:12px}
.lb-inner img{max-height:calc(90vh - 180px);width:auto;max-width:100%;object-fit:contain;border-radius:10px}
.lb-close{position:absolute;top:20px;right:20px;background:rgba(11,22,40,.85);color:#fff;border-color:#4A6290}
.lb-bar{display:flex;align-items:center;gap:12px;width:100%;justify-content:space-between}
.lb-cap{margin:0;flex:1;text-align:center;font-size:15px}
.lb-source-row{margin:0;text-align:center}
.lb-bar .btn,.lb-source-row .btn{background:rgba(11,22,40,.85);color:#fff;border-color:#4A6290}
.lightbox :focus-visible{outline-color:#9DBBFF}

.site-footer{border-top:1px solid var(--line);padding:32px 0;color:var(--muted);font-size:14px}
.foot-row{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between}
.foot-row p{margin:0}
.noscript{padding:24px}
.empty-msg{color:var(--muted)}

@media (max-width:1120px){
  .menu-btn{display:grid}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 16px 16px}
  .nav.open{display:block}
  .nav ul{flex-direction:column;gap:0}
  .nav a{padding:12px;font-size:16px}
}
@media (max-width:820px){
  .hero{padding:40px 0 32px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .portrait-wrap{order:-1;justify-self:center;max-width:280px}
  .section{padding:64px 0}
  .contact-card{padding:28px 22px}
}
@media (max-width:420px){
  .wrap{padding:0 16px}
  body{font-size:16px}
  .header-row{gap:8px}
  .brand-name{display:none}
  .chip{min-width:40px;padding:0 8px}
  .skill-grid,.card-grid,.card-grid.narrow{grid-template-columns:1fr}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
  .timeline{padding-left:18px}
  .tl-item{padding-left:18px}
  .tl-item::before{left:-26px}
}