:root {
  --paper: #fff;
  --ink: #191919;
  --body: #454545;
  --muted: #686868;
  --line: #dededb;
  --soft: #f6f6f4;
  --sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --serif: "DM Serif Display", Georgia, serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.8 var(--sans); word-break: keep-all; overflow-wrap: anywhere; }
a { color: inherit; text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { text-decoration-color: var(--ink); }
button { font: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 5px; }
::selection { background: #e3e3df; }
img { display: block; max-width: 100%; }
code { padding: 2px 4px; background: var(--soft); font: .86em/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; word-break: break-word; }
.serif { font-family: var(--serif); font-weight: 400; }
.skip { position: fixed; top: 12px; left: 16px; z-index: 100; padding: 10px 18px; background: var(--ink); color: white; transform: translateY(-160%); }
.skip:focus { transform: none; }
.shell { max-width: 1280px; padding-inline: 48px; margin-inline: auto; }
.nav { min-height: 96px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--ink); }
.brand { font: 26px/1 var(--serif); text-decoration: none; }
.brand small { font: 12px/1 var(--sans); color: var(--muted); margin-left: 12px; }
.nav-links { display: flex; gap: 28px; margin-left: auto; font-size: 13px; }
.nav-links a, .header-links a { text-decoration: none; }
.nav-links a:hover, .header-links a:hover { text-decoration: underline; }
.header-links { display: flex; gap: 24px; margin-left: 44px; font-size: 13px; }
.header-links span { margin-left: 4px; color: var(--muted); }
.layout { display: grid; grid-template-columns: 154px minmax(0, 1fr); column-gap: 70px; align-items: start; }
.toc { position: sticky; top: 36px; padding-top: 62px; }
.toc-title { margin: 0 0 20px; color: var(--muted); font-size: 11px; letter-spacing: .08em; font-weight: 500; }
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 4px 0; }
.toc a { display: block; padding: 5px 0; color: var(--muted); font-size: 13px; line-height: 1.65; text-decoration: none; }
.toc a.active { color: var(--ink); font-weight: 650; }
.toc a.active::before { content: ""; position: absolute; width: 4px; height: 4px; margin: 9px 0 0 -13px; background: var(--ink); }
.toc a:hover { color: var(--ink); }
.toc .sub { margin: 0; }
.toc .sub a { padding-block: 5px; font-size: 12px; }
.toc .sub + li:not(.sub) { margin-top: 16px; }
.toc .sub span { display: inline-block; margin-right: 7px; font: 11px ui-monospace, monospace; color: var(--muted); }
main { min-width: 0; }
section, article { scroll-margin-top: 30px; }
.about { display: grid; grid-template-columns: minmax(0, 1fr) 210px; gap: 54px; align-items: center; padding: 64px 0 60px; }
.eyebrow { color: var(--muted); font-size: 17px; font-weight: 400; margin: 0 0 18px; }
.about h1 { margin: 0 0 22px; font-size: 64px; line-height: 1.1; letter-spacing: -.045em; font-weight: 650; }
.headline { margin: 0 0 14px; font-size: 20px; line-height: 1.55; letter-spacing: -.025em; font-weight: 500; }
.lead { margin: 0; font-size: 15px; line-height: 1.9; color: var(--body); max-width: 34em; }
.about-links { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 25px; font-size: 13px; }
.about-links a { text-decoration-color: #a6a6a0; }
.portrait { margin: 0; }
.photo { width: 210px; height: 264px; overflow: hidden; background: var(--soft); }
.photo img { width: 100%; height: 100%; object-fit: cover; object-position: 64% 25%; filter: brightness(1.08); }
.portrait figcaption { margin-top: 10px; font-size: 11px; color: var(--muted); }
.sec-title { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding: 28px 0 25px; border-top: 1px solid var(--ink); }
.sec-title h2 { font-size: 28px; letter-spacing: -.03em; line-height: 1.3; font-weight: 600; margin: 0; }
.section-en { font: 20px/1.4 var(--serif); color: var(--muted); }
.case-index { list-style: none; margin: 0; padding: 0 0 28px; }
.case-index a { display: grid; grid-template-columns: 30px minmax(0, 1fr) 110px 20px; gap: 14px; align-items: baseline; padding: 13px 0; text-decoration: none; border-bottom: 1px solid #eeeeeb; }
.case-index a:hover .index-title { text-decoration: underline; text-underline-offset: 5px; }
.index-no { font: 12px/1.5 ui-monospace, monospace; color: var(--muted); }
.index-title { font-size: 15px; line-height: 1.5; font-weight: 500; }
.index-project { font-size: 12px; color: var(--muted); text-align: right; }
.index-arrow { font-size: 16px; text-align: right; color: var(--muted); }
.case { padding: 52px 0 62px; border-top: 1px solid var(--line); }
.case-top { display: flex; align-items: baseline; gap: 12px; font-size: 12px; color: var(--muted); margin-bottom: 18px; }
.case-no { font: 13px/1.5 ui-monospace, monospace; color: var(--ink); }
.proj { font-size: 13px; font-weight: 600; color: var(--ink); }
.case-context { margin-left: auto; text-align: right; }
.case h3 { margin: 0 0 17px; max-width: 24em; font-size: 31px; line-height: 1.45; font-weight: 600; letter-spacing: -.035em; text-wrap: balance; }
.case-deck { margin: 0 0 32px; max-width: 47em; font-size: 15px; line-height: 1.85; color: var(--muted); }
.case figure { margin: 0 0 36px; }
.figure-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 20px; margin-bottom: 12px; font-size: 12px; color: var(--muted); }
.figure-heading .figure-title { margin: 0; font-weight: 500; }
.figure-heading a { font-size: 12px; white-space: nowrap; text-decoration: none; }
.figure-heading a:hover { text-decoration: underline; }
.diagram-link { display: block; border: 1px solid var(--line); padding: 10px; cursor: zoom-in; background: white; }
.diagram-link:hover { border-color: #999; }
.diagram-image { width: 100%; height: auto; }
figcaption { margin: 10px 0 0; font-size: 12px; line-height: 1.7; color: var(--muted); }
.psr { display: grid; gap: 0; }
.psr > div { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 20px; padding: 22px 0; border-top: 1px solid #eaeae7; }
.psr .label { margin: 0; padding-top: 2px; font-size: 13px; font-weight: 600; }
.psr ul { list-style: disc outside; margin: 0; padding-left: 1.15em; max-width: 46em; }
.psr li { color: var(--body); font-size: 15px; line-height: 1.9; }
.psr li::marker { color: var(--muted); font-size: .8em; }
.psr li + li { margin-top: 12px; }
.psr li b { color: var(--ink); font-weight: 600; }
.psr .psr-note { grid-column: 2; margin: 10px 0 0; padding-left: 1.15em; font-size: 13px; line-height: 1.7; color: var(--muted); }
.psr .result { border-top-color: #9d9d98; padding-bottom: 0; }
#projects { margin-top: 36px; }
.project-list { display: grid; }
.project { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 36px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.project:last-child { border-bottom: 0; }
.project h3 { font: 27px/1.3 var(--serif); margin: 0 0 12px; letter-spacing: -.015em; }
.project .pmeta { color: var(--muted); font-size: 12px; line-height: 1.9; }
.project p { font-size: 15px; margin: 0 0 12px; }
.project .pstack { color: var(--muted); font-size: 12px; line-height: 1.8; margin-bottom: 14px; }
.plinks { display: flex; flex-wrap: wrap; gap: 10px 18px; font-size: 12px; }
.plinks a { text-decoration-color: #b0b0ab; }
.project-cases { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 13px; margin-bottom: 16px; }
.project-figure { margin: 4px 0 18px; }
.project-cases a { text-decoration-color: #b0b0ab; }
.resume-section { margin-top: 48px; }
.skill-group { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 32px; padding: 17px 0; border-bottom: 1px solid #eeeeeb; }
.skill-group:last-child { border: 0; }
.skill-group p { margin: 0; font-size: 13px; color: var(--muted); }
.pills { display: flex; flex-wrap: wrap; gap: 4px 22px; list-style: none; margin: 0; padding: 0; }
.pills li { font-size: 15px; color: var(--body); }
.resume-group { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 32px; padding: 22px 0; }
.resume-group + .resume-group { border-top: 1px solid var(--line); }
.resume-group h3 { margin: 2px 0 0; font-size: 13px; font-weight: 500; color: var(--muted); }
.tl { list-style: none; margin: 0; padding: 0; display: grid; gap: 28px; }
.tl b { display: block; font-size: 16px; font-weight: 600; }
.tl span { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }
.tl p, .tl ul { margin: 8px 0 0; font-size: 14px; color: var(--body); }
.tl ul { padding-left: 17px; }
.tl li li + li { margin-top: 5px; }
.tl a { text-decoration-color: #aaa; }
.cert-list { gap: 18px; }
.contact { border-top: 1px solid var(--ink); margin-top: 62px; padding: 34px 0 50px; display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 20px; }
.contact h2 { margin: 0 0 6px; font: 32px/1.3 var(--serif); }
.contact p { color: var(--muted); font-size: 13px; margin: 0; }
.contact-email { font-size: 20px; text-decoration-color: #aaa; }
footer { max-width: 1280px; padding: 28px 48px 40px; margin: 0 auto; display: flex; justify-content: space-between; gap: 20px; font-size: 11px; color: var(--muted); }
.to-top { position: fixed; bottom: 26px; right: 24px; width: 44px; height: 44px; border: 1px solid var(--line); background: white; color: var(--ink); opacity: 0; visibility: hidden; font-size: 19px; }
.to-top.show { opacity: 1; visibility: visible; }
.mobile-tools { display: none; }
.toc-fab { border: 0; background: none; color: var(--ink); padding: 10px 0; font-size: 13px; }
.toc-sheet { display: none; position: fixed; left: 20px; right: 20px; top: 64px; z-index: 24; padding: 18px 24px; border: 1px solid var(--ink); background: white; max-height: 65vh; overflow: auto; }
.toc-sheet.open { display: block; }
.toc-sheet ol { list-style: none; margin: 0; padding: 0; }
.toc-sheet a { display: block; padding: 7px 0; font-size: 14px; text-decoration: none; }
.toc-sheet .sub a { padding-left: 14px; color: var(--muted); font-size: 13px; }
.toc-sheet .sub span { margin-right: 8px; }
.toc-sheet a.active { font-weight: 650; text-decoration: underline; }
.diagram-dialog { border: 1px solid var(--line); padding: 0; width: min(1160px, calc(100% - 48px)); max-width: none; max-height: calc(100dvh - 48px); color: var(--ink); background: white; }
.diagram-dialog::backdrop { background: rgb(20 20 20 / .65); }
.dialog-bar { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 18px 24px; border-bottom: 1px solid var(--line); }
.dialog-bar h2 { font-size: 16px; line-height: 1.5; margin: 0; font-weight: 600; }
.dialog-controls { display: flex; align-items: center; gap: 18px; flex-shrink: 0; font-size: 13px; }
.dialog-controls button { border: 0; background: none; padding: 6px; font-size: 13px; }
.dialog-controls a { text-decoration: none; }
.dialog-controls button:hover, .dialog-controls a:hover { text-decoration: underline; }
.diagram-stage { overflow: auto; max-height: calc(100dvh - 190px); padding: 24px; }
.diagram-stage img { margin: 0 auto; width: 100%; max-width: 1000px; height: auto; }
.diagram-stage.zoomed img { min-width: 1300px; max-width: none; }
.dialog-hint { border-top: 1px solid var(--line); margin: 0; padding: 10px 24px; font-size: 12px; color: var(--muted); }
@media (min-width: 1600px) { .shell, footer { max-width: 1340px; } .layout { column-gap: 92px; } }
@media (max-width: 1100px) {
  .shell { padding-inline: 36px; }
  .layout { grid-template-columns: 130px minmax(0, 1fr); column-gap: 36px; }
  .toc a { font-size: 12px; }
  .toc .sub a { font-size: 11px; }
  .about { grid-template-columns: minmax(0, 1fr) 165px; gap: 28px; }
  .photo { width: 165px; height: 228px; }
  .about h1 { font-size: 54px; }
  .header-links { margin-left: 16px; }
  .project { grid-template-columns: 170px minmax(0, 1fr); gap: 28px; }
}
@media (max-width: 850px) {
  .shell { padding-inline: 32px; }
  .nav { min-height: 78px; }
  .nav-links { display: none; }
  .header-links { margin: 0; }
  .layout { display: block; }
  .toc { display: none; }
  .mobile-tools { position: sticky; top: 0; z-index: 25; display: flex; justify-content: space-between; align-items: center; min-height: 46px; background: white; border-bottom: 1px solid var(--line); }
  .mobile-tools a { font-size: 12px; color: var(--muted); text-decoration: none; }
  .about { grid-template-columns: minmax(0, 1fr) 190px; padding-top: 48px; gap: 40px; }
  .photo { width: 190px; height: 248px; }
  .to-top { display: none; }
  html { scroll-padding-top: 54px; }
  footer { padding: 22px 32px 100px; }
}
@media (max-width: 560px) {
  .shell { padding-inline: 24px; }
  .brand { font-size: 23px; }
  .brand small { display: none; }
  .header-links { gap: 20px; font-size: 12px; }
  .about { grid-template-columns: 1fr; padding: 38px 0 42px; gap: 28px; }
  .about h1 { font-size: 48px; margin-bottom: 20px; }
  .eyebrow { margin-bottom: 14px; }
  .headline { font-size: 19px; }
  .lead { font-size: 14px; }
  .portrait { display: grid; grid-template-columns: 108px minmax(0, 1fr); gap: 16px; align-items: end; }
  .photo { width: 108px; height: 122px; }
  .portrait figcaption { margin: 0 0 2px; font-size: 11px; }
  .sec-title { padding: 22px 0; gap: 14px; }
  .sec-title h2 { font-size: 24px; }
  .section-en { font-size: 16px; }
  .case-index a { grid-template-columns: 24px minmax(0, 1fr) 12px; gap: 10px; padding: 13px 0; }
  .index-title { font-size: 14px; }
  .index-project { display: none; }
  .case { padding: 36px 0 46px; }
  .case-top { flex-wrap: wrap; gap: 5px 10px; margin-bottom: 15px; }
  .case-context { flex-basis: 100%; margin: 0; text-align: left; font-size: 11px; }
  .case h3 { font-size: 25px; }
  .case-deck { font-size: 14px; margin-bottom: 24px; }
  .figure-heading { gap: 12px; font-size: 11px; }
  .figure-heading a { font-size: 11px; }
  .diagram-link { padding: 3px; }
  .case figure { margin-bottom: 24px; }
  .psr > div { grid-template-columns: 1fr; gap: 10px; padding: 20px 0; }
  .psr .psr-note { grid-column: 1; margin-top: 0; }
  .psr li { font-size: 14px; line-height: 1.9; }
  .psr .label { font-size: 13px; }
  .project { grid-template-columns: 1fr; gap: 16px; padding-block: 26px; }
  .project h3 { font-size: 27px; margin-bottom: 6px; }
  .project p { font-size: 14px; }
  .skill-group, .resume-group { grid-template-columns: 1fr; gap: 12px; }
  .pills { gap: 4px 18px; }
  .pills li { font-size: 14px; }
  .tl b { font-size: 15px; }
  .resume-section { margin-top: 36px; }
  .contact { margin-top: 44px; padding-bottom: 30px; }
  .contact-email { font-size: 18px; }
  footer { padding-inline: 24px; }
  .diagram-dialog { width: calc(100% - 20px); max-height: calc(100dvh - 20px); }
  .dialog-bar { padding: 14px 16px; align-items: flex-start; flex-direction: column; gap: 10px; }
  .dialog-controls { width: 100%; justify-content: space-between; }
  .dialog-bar h2 { font-size: 14px; }
  .diagram-stage { padding: 12px; max-height: calc(100dvh - 205px); }
  .diagram-stage.zoomed img { min-width: 1000px; }
  .dialog-hint { padding: 10px 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  .nav, .toc, .mobile-tools, .toc-sheet, .to-top, .about-links, .case-index, .diagram-dialog { display: none !important; }
  .shell { max-width: none; padding: 0; }
  .layout { display: block; }
  .about { padding: 0 0 32px; }
  .case { break-before: page; padding-block: 24px; }
  .case figure, .psr > div, .project, .tl > li { break-inside: avoid; }
  .figure-heading a { display: none; }
  .diagram-link { border: 0; }
  footer { padding: 20px 0; }
}