:root {
  color-scheme: light dark;
  --surface-page: #fafafa;
  --surface-soft: #f0f0f0;
  --surface-hover: #e9e9e9;
  --text-primary: #101010;
  --text-secondary: #626262;
  --text-tertiary: #707070;
  --border-default: #c9c9c9;
  --border-subtle: #e0e0e0;
  --accent-primary: #101010;
  --focus-ring: #3068d5;
  --on-accent: #fafafa;
  --font-body: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --font-display: Arial, Helvetica, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, monospace;
  --type-size-label: .75rem;
  --type-size-small: .875rem;
  --type-size-body: 1rem;
  --type-size-large: 1.125rem;
  --type-size-project: clamp(1.5rem, 3vw, 2.5rem);
  --type-size-section: clamp(2rem, 4vw, 3.5rem);
  --type-size-title: clamp(2.5rem, 4.8vw, 4.5rem);
  --type-size-contact: clamp(2rem, 5vw, 4rem);
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --leading-body: 1.65;
  --leading-tight: 1.1;
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --page-inset: var(--space-10);
  --content-width: 76rem;
  --motion-reveal-distance: 24px;
  --motion-reveal-duration: 800ms;
  --motion-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --motion-feedback-duration: 200ms;
  --motion-feedback-distance: 2px;
}
@media (prefers-color-scheme: dark) {
  :root { --surface-page: #151515; --surface-soft: #202020; --surface-hover: #2b2b2b; --text-primary: #f5f5f5; --text-secondary: #b5b5b5; --text-tertiary: #a5a5a5; --border-default: #484848; --border-subtle: #333333; --accent-primary: #f5f5f5; --on-accent: #151515; --focus-ring: #91b8ff; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body { margin: 0; background: var(--surface-page); color: var(--text-primary); font: var(--weight-regular) var(--type-size-body)/var(--leading-body) var(--font-body); word-break: keep-all; -webkit-font-smoothing: antialiased; }
h1,h2,h3,p,figure { margin: 0; }
h1,h2 { text-wrap: balance; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: .25em; }
a:hover { text-decoration: underline; }
a:focus-visible,summary:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 4px; }
a > span[aria-hidden="true"] { display: inline-block; transition: transform var(--motion-feedback-duration) var(--motion-ease); }
@media (prefers-reduced-motion: no-preference) {
  a:is(:hover, :focus-visible) > span[aria-hidden="true"] { transform: translate(var(--motion-feedback-distance), calc(-1 * var(--motion-feedback-distance))); }
}
@media (prefers-reduced-motion: reduce) {
  a > span[aria-hidden="true"] { transition: none; }
}
.page-shell { width: min(calc(100% - var(--page-inset) * 2),var(--content-width)); margin-inline: auto; }
.skip-link { position: absolute; z-index: 2; top: var(--space-3); left: var(--space-3); padding: var(--space-3); background: var(--surface-page); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-5); }
.site-brand { display: inline-flex; align-items: center; min-width: 44px; min-height: 44px; text-decoration: none; }
.brand-name { font-size: var(--type-size-small); font-weight: var(--weight-medium); }
.brand-name small { margin-left: var(--space-3); color: var(--text-secondary); font-size: var(--type-size-label); font-weight: var(--weight-regular); }
.site-nav { display: flex; flex-wrap: wrap; gap: var(--space-8); font-size: var(--type-size-small); }
.site-nav a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; text-decoration: none; }
.site-nav a:hover { text-decoration: underline; }
.eyebrow { color: var(--text-secondary); font: var(--weight-regular) var(--type-size-label)/var(--leading-body) var(--font-mono); }
.hero { padding-block: var(--space-10) var(--space-6); border-top: 1px solid var(--border-subtle); }
.hero-title { margin-top: var(--space-6); font-size: var(--type-size-title); font-weight: var(--weight-medium); line-height: 1.2; letter-spacing: -.065em; }
.hero-bottom { display: flex; justify-content: space-between; align-items: end; gap: var(--space-8); margin-top: var(--space-6); }
.hero-bottom p { color: var(--text-secondary); font-size: var(--type-size-small); }
.hero-bottom a { display: inline-flex; align-items: center; gap: var(--space-8); min-height: 44px; font-size: var(--type-size-small); text-decoration: none; border-bottom: 1px solid var(--border-default); }
.feature > *,.contact > * { min-width: 0; }
.section-count { display: inline-block; margin-left: var(--space-4); vertical-align: top; font: var(--weight-regular) var(--type-size-small)/1.5 var(--font-mono); color: var(--text-secondary); letter-spacing: 0; }
#projects { padding-top: var(--space-8); }
#projects .section-heading { margin-bottom: var(--space-6); }
.section-block { padding-top: var(--space-20); scroll-margin-top: var(--space-6); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: var(--space-8); margin-bottom: var(--space-12); }
.section-heading h2 { margin-top: var(--space-3); font-size: var(--type-size-section); font-weight: var(--weight-medium); letter-spacing: -.06em; line-height: var(--leading-tight); }
.section-heading > p { color: var(--text-secondary); font-size: var(--type-size-small); text-align: right; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16) var(--space-10); }
.feature-wide { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 2.1fr) minmax(0, 1fr); gap: var(--space-10); align-items: center; }
.feature-wide .feature-index { grid-column: 1 / -1; margin-bottom: calc(-1 * var(--space-6)); }
.feature-wide .feature-copy { padding-top: 0; }
.feature { position: relative; min-width: 0; padding-bottom: var(--space-10); scroll-margin-top: var(--space-6); }
.feature-index { display: block; margin-bottom: var(--space-5); font: var(--weight-regular) var(--type-size-small)/1 var(--font-mono); color: var(--text-secondary); }
.feature-figure { display: flex; align-items: center; aspect-ratio: 16 / 11; background: var(--surface-soft); padding: var(--space-5); border: 1px solid var(--border-subtle); }
.project-image { width: 100%; max-height: 100%; object-fit: contain; }
.feature-wide .feature-figure { aspect-ratio: 16 / 10; }
.feature-copy { padding-top: var(--space-6); }
summary { cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
.feature-detail summary { display: flex; flex-direction: column; align-items: start; }
.project-meta { font-size: var(--type-size-label); color: var(--text-secondary); }
.feature-title { margin-top: var(--space-2); font-size: var(--type-size-project); line-height: 1.25; font-weight: var(--weight-medium); letter-spacing: -.04em; }
.feature-summary { margin-top: var(--space-3); font-size: var(--type-size-small); color: var(--text-secondary); }
.disclosure-label { display: inline-flex; align-items: center; min-height: 44px; gap: var(--space-8); margin-top: var(--space-4); border-bottom: 1px solid var(--border-default); font-size: var(--type-size-small); }
.disclosure-label span { font-size: 0; }
.disclosure-label span::after { content: "+"; font-size: var(--type-size-body); }
details[open] .disclosure-label span::after { content: "−"; }
.detail-content { padding-top: var(--space-4); font-size: var(--type-size-small); color: var(--text-secondary); }
.detail-content p { max-width: 42rem; }
.detail-content a { display: inline-block; min-height: 44px; padding-block: var(--space-3); color: var(--text-primary); }
.archive-grid { border-top: 1px solid var(--border-default); }
.archive-group { display: grid; grid-template-columns: 1fr 3fr; gap: var(--space-10); padding-block: var(--space-8); border-bottom: 1px solid var(--border-default); }
.archive-group h3 { font-size: var(--type-size-large); font-weight: var(--weight-medium); letter-spacing: -.03em; }
.archive-group h3::before { display: block; color: var(--text-primary); font: var(--weight-regular) var(--type-size-section)/1 var(--font-display); margin-bottom: var(--space-4); letter-spacing: -.06em; }
.archive-group:nth-child(1) h3::before { content: "01"; }
.archive-group:nth-child(2) h3::before { content: "02"; }
.archive-group:nth-child(3) h3::before { content: "03"; }
.archive-list { list-style: none; margin: 0; padding: 0; }
.archive-entry { border-bottom: 1px solid var(--border-subtle); }
.archive-entry:last-child { border-bottom: 0; }
.archive-entry summary { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.45fr) var(--space-5); gap: var(--space-5); align-items: start; min-height: 44px; padding: var(--space-4) var(--space-2); font-size: var(--type-size-small); }
.archive-entry summary:hover { background: var(--surface-hover); }
.archive-entry strong { font-weight: var(--weight-medium); }
.archive-teaser,.disclosure-mark { color: var(--text-secondary); }
.disclosure-mark { text-align: center; font-family: var(--font-mono); }
.disclosure-mark::after { content: "+"; }
details[open] .disclosure-mark::after { content: "−"; }
.archive-entry .detail-content { padding: 0 var(--space-8) var(--space-5) var(--space-2); }
.contact { display: grid; grid-template-columns: 1.2fr 1fr; align-items: end; gap: var(--space-10); margin-top: var(--space-20); padding-block: var(--space-16); border-top: 1px solid var(--border-subtle); }
.contact h2 { margin-top: var(--space-6); font-size: var(--type-size-contact); line-height: 1.2; font-weight: var(--weight-medium); letter-spacing: -.06em; }
.contact p:last-child { margin-top: var(--space-5); color: var(--text-secondary); font-size: var(--type-size-small); }
.contact-links { display: flex; flex-direction: column; align-items: start; gap: var(--space-3); }
.contact-links a { display: flex; align-items: center; min-height: 44px; gap: var(--space-5); font-size: var(--type-size-small); overflow-wrap: anywhere; }
.contact-links .contact-email { font-size: var(--type-size-project); letter-spacing: -.035em; }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); border-top: 1px solid var(--border-subtle); padding-block: var(--space-5); color: var(--text-secondary); font-size: var(--type-size-label); }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
@media(max-width: 900px) {
  .feature-figure { padding: var(--space-4); }
  .archive-group { grid-template-columns: 1fr 3.5fr; gap: var(--space-6); }
}
@media(max-width: 700px) {
  :root { --page-inset: var(--space-5); }
  .brand-name small { display: none; }
  .site-header { padding-block: var(--space-3); }
  .site-nav { gap: var(--space-4); }
  .hero { padding-top: var(--space-8); padding-bottom: var(--space-12); }
  .hero-title { margin-top: var(--space-5); font-size: clamp(2.2rem, 8vw, 3.5rem); }
  .hero-bottom { flex-direction: column; align-items: start; gap: var(--space-5); margin-top: var(--space-6); }
  .hero-bottom p br { display: none; }
  .feature-wide { display: block; grid-column: auto; }
  .feature-wide .feature-index { margin-bottom: var(--space-5); }
  .feature-wide .feature-copy { padding-top: var(--space-6); }
  .section-block { padding-top: var(--space-12); }
  .section-heading { flex-direction: column; align-items: start; gap: var(--space-4); margin-bottom: var(--space-8); }
  .section-heading > p { text-align: left; }
  .feature-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .feature-figure { min-height: 0; }
  .archive-group { grid-template-columns: 1fr; gap: var(--space-6); }
  .archive-entry summary { grid-template-columns: minmax(0,1fr) var(--space-5); gap: var(--space-1) var(--space-3); }
  .archive-teaser { grid-row: 2; grid-column: 1; }
  .disclosure-mark { grid-row: 1; grid-column: 2; }
  .contact { grid-template-columns: 1fr; gap: var(--space-8); margin-top: var(--space-12); padding-block: var(--space-12); }
}