@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  --navy-950: #0d2247;
  --navy-900: #133261;
  --navy-800: #1c437c;
  --navy-ink: #0a1a33;
  --paper: #f4efe4;
  --paper-dim: #e9e2d2;
  --rule: #c9bfa8;
  --rule-on-navy: rgba(244, 239, 228, 0.28);
  --orange: #eb652e;
  --orange-deep: #c74c1c;
  --ink: #201b12;
  --ink-soft: #55503f;
  --on-navy: #f4efe4;
  --on-navy-soft: #b9c3d6;

  --serif: "Noto Serif KR", "Source Han Serif", Georgia, serif;
  --sans: "Noto Sans KR", "Source Han Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --measure: 68ch;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: break-word;
}

img { max-width: 100%; display: block; }

::selection { background: var(--orange); color: var(--on-navy); }

a { color: inherit; }

/* language toggle visibility — hides the inactive language only, so each
   element keeps whatever display value its own component rule already gives it */
html[data-lang="ko"] [data-lang="en"], html[data-lang="ko"] [data-lang="zh"] { display: none !important; }
html[data-lang="en"] [data-lang="ko"], html[data-lang="en"] [data-lang="zh"] { display: none !important; }
html[data-lang="zh"] [data-lang="ko"], html[data-lang="zh"] [data-lang="en"] { display: none !important; }

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 64px);
}

/* ---------- masthead ---------- */
.masthead {
  background: var(--navy-900);
  color: var(--on-navy);
  border-bottom: 1px solid var(--rule-on-navy);
}
.masthead__row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding: 18px 0;
}
.masthead__brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-right: auto;
}
.masthead__logo-plate {
  background: var(--paper);
  padding: 8px 12px;
  display: inline-flex;
  align-items: center;
  flex: none;
}
.masthead__logo { height: 26px; width: auto; }
.masthead__firm {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--on-navy-soft);
  border-left: 1px solid var(--rule-on-navy);
  padding-left: 14px;
  line-height: 1.35;
}
.masthead__firm b { color: var(--on-navy); font-weight: 500; }

.masthead__id {
  text-align: right;
  font-family: var(--serif);
}
.masthead__name { font-size: 1.05rem; font-weight: 600; }
.masthead__title { font-family: var(--sans); font-size: 0.82rem; color: var(--on-navy-soft); margin-top: 2px; }

.langtoggle {
  display: inline-flex;
  border: 1px solid var(--rule-on-navy);
  border-radius: 2px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  flex: none;
}
.langtoggle button {
  background: transparent;
  color: var(--on-navy-soft);
  border: none;
  padding: 7px 12px;
  cursor: pointer;
  font: inherit;
}
.langtoggle button[aria-pressed="true"] {
  background: var(--orange);
  color: var(--navy-ink);
  font-weight: 600;
}

/* ---------- cover exhibit ---------- */
.cover {
  background: var(--navy-900);
  color: var(--on-navy);
  padding: clamp(56px, 9vw, 108px) 0 clamp(48px, 7vw, 84px);
  position: relative;
}
.cover::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--rule-on-navy) 12%, var(--rule-on-navy) 88%, transparent);
}
.cover__grid {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.plate {
  border: 1px solid var(--rule-on-navy);
  padding: 14px;
}
.plate__frame {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--navy-950);
}
.plate__frame img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 18%; filter: grayscale(0.12) contrast(1.04); }
.plate__caption {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--rule-on-navy);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--on-navy-soft);
  line-height: 1.6;
}
.plate__caption b { color: var(--on-navy); font-weight: 500; display: block; font-family: var(--serif); font-size: 0.95rem; margin-bottom: 4px; }

.cover__head {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.9rem, 3.6vw, 3.1rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 22px;
  max-width: 16ch;
}
.cover__thesis {
  max-width: var(--measure);
  color: var(--on-navy-soft);
  font-size: 1.02rem;
  line-height: 1.75;
  margin: 0 0 30px;
}
.cover__thesis strong { color: var(--on-navy); font-weight: 600; }

.chips { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--rule-on-navy); }
.chip { border-bottom: 1px solid var(--rule-on-navy); }
.chip summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 0;
  font-size: 0.95rem;
}
.chip summary::-webkit-details-marker { display: none; }
.chip summary .seal { flex: none; margin-top: 2px; }
.chip summary .label { flex: 1; }
.chip summary .chevron { flex: none; color: var(--on-navy-soft); font-family: var(--mono); font-size: 0.75rem; transition: transform 0.2s ease; margin-top: 3px; }
.chip[open] summary .chevron { transform: rotate(90deg); }
.chip .note {
  margin: 0 0 16px 34px;
  color: var(--on-navy-soft);
  font-size: 0.88rem;
  line-height: 1.65;
  max-width: 56ch;
  border-left: 2px solid var(--orange);
  padding-left: 14px;
}
.note p { margin: 0 0 12px; }
.note p:last-child { margin-bottom: 0; }
.note-list { list-style: none; margin: 12px 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.note-list__item { display: grid; grid-template-columns: 26px 1fr; gap: 10px; }
.note-list__num { font-family: var(--mono); font-size: 0.78rem; color: var(--orange); padding-top: 1px; }
.note-list__item b { color: var(--on-navy); font-weight: 600; }

.seal {
  width: 20px; height: 20px;
  color: var(--orange);
}

/* ---------- exhibit sections (paper) ---------- */
.exhibit {
  background: var(--paper);
  padding: clamp(52px, 8vw, 96px) 0;
  border-bottom: 1px solid var(--rule);
}
.exhibit--navy {
  background: var(--navy-900);
  color: var(--on-navy);
  border-bottom: 1px solid var(--rule-on-navy);
}
.exhibit__kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  color: var(--orange-deep);
  margin: 0 0 10px;
}
.exhibit--navy .exhibit__kicker { color: var(--orange); }
.exhibit__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  margin: 0 0 34px;
  max-width: 24ch;
}

/* ledger */
.ledger { border-top: 1px solid var(--rule); }
.ledger__row {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}
.ledger__period {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  padding-top: 3px;
}
.ledger__org { font-family: var(--serif); font-weight: 600; font-size: 1.14rem; margin: 0 0 3px; }
.ledger__title { font-size: 0.92rem; color: var(--ink-soft); margin: 0 0 10px; }
.ledger__desc { font-size: 0.95rem; line-height: 1.7; max-width: var(--measure); margin: 0; }
.proof { margin-top: 28px; }
.proof__headline {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.1rem;
  line-height: 1.5;
  max-width: 62ch;
  margin: 0 0 18px;
}
.proof__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.proof__card {
  position: relative;
  padding: 20px 20px 18px;
  background: var(--paper-dim);
  border-top: 2px solid var(--orange);
}
.proof__seal { position: absolute; top: 18px; right: 18px; color: var(--orange-deep); width: 17px; height: 17px; }
.proof__label {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--orange-deep);
  margin: 0 0 6px;
}
.proof__sub {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 0.98rem;
  margin: 0 0 10px;
  padding-right: 24px;
}
.proof__text { font-size: 0.9rem; line-height: 1.65; color: var(--ink-soft); margin: 0; }
.proof__note {
  margin-top: 14px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--ink-soft);
}
.proof__note b { color: var(--ink); font-weight: 600; }

.evidence-row {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 16px;
  padding: 14px;
  background: var(--paper-dim);
}
.evidence-row img { width: 74px; height: 74px; object-fit: cover; flex: none; }
.evidence-row__text { font-size: 0.86rem; line-height: 1.55; color: var(--ink-soft); }
.evidence-row__text b { color: var(--ink); font-weight: 600; }

.dealtypes {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}
.dealtypes span { border: 1px solid var(--rule); padding: 5px 11px; }

/* practical wisdom + education */
.wisdom__quote {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  line-height: 1.5;
  max-width: 20ch;
  margin: 0 0 26px;
}
.wisdom__body {
  max-width: var(--measure);
  color: var(--on-navy-soft);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0;
}

.edu {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--rule-on-navy);
}
.edu__title {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  color: var(--orange);
  margin: 0 0 22px;
}
.edu__list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 22px 40px; }
.edu__item { border-top: 1px solid var(--rule-on-navy); padding-top: 14px; }
.edu__org { font-family: var(--serif); font-weight: 600; font-size: 1.02rem; margin: 0 0 4px; }
.edu__degree { font-size: 0.88rem; color: var(--on-navy-soft); line-height: 1.6; }
.edu__degree em { color: var(--orange); font-style: normal; }

/* services */
.services { border-top: 1px solid var(--rule); }
.service-row {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}
.service-row__num { font-family: var(--mono); font-size: 0.85rem; color: var(--orange-deep); padding-top: 4px; }
.service-row__name { font-family: var(--serif); font-weight: 600; font-size: 1.16rem; margin: 0 0 6px; }
.service-row__desc { font-size: 0.94rem; color: var(--ink-soft); line-height: 1.65; margin: 0; max-width: 56ch; }

/* closing + contact */
.closing {
  background: var(--navy-900);
  color: var(--on-navy);
  padding: clamp(56px, 9vw, 104px) 0 0;
}
.closing__quote {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.55;
  max-width: 42ch;
  margin: 0 0 clamp(48px, 7vw, 80px);
  padding-bottom: clamp(48px, 7vw, 80px);
  border-bottom: 1px solid var(--rule-on-navy);
}

.signoff {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  padding-bottom: clamp(48px, 7vw, 80px);
}
.signoff > * { min-width: 0; }
.signoff__brand {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 0 6px;
}
.signoff__name { font-size: 1rem; margin: 0 0 2px; }
.signoff__title { font-size: 0.88rem; color: var(--on-navy-soft); margin: 0 0 26px; }

.addr { margin: 0 0 18px; font-size: 0.92rem; line-height: 1.7; }
.addr b { display: block; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; color: var(--orange); margin-bottom: 5px; }

.reach { list-style: none; margin: 0; padding: 0; }
.reach li { display: grid; grid-template-columns: 92px 1fr; gap: 10px; padding: 9px 0; border-top: 1px solid var(--rule-on-navy); font-size: 0.92rem; }
.reach li:last-child { border-bottom: 1px solid var(--rule-on-navy); }
.reach span { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.05em; color: var(--on-navy-soft); padding-top: 2px; }
.reach a { text-decoration: none; border-bottom: 1px solid var(--rule-on-navy); }
.reach a:hover, .reach a:focus-visible { border-bottom-color: var(--orange); color: var(--orange); }

.foot {
  border-top: 1px solid var(--rule-on-navy);
  padding: 18px 0;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--on-navy-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* focus ring, tabular nums */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}
.ledger__period, .reach span, .masthead__firm, time { font-variant-numeric: tabular-nums; }

/* motion: one authored reveal on scroll */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .reveal.is-visible { opacity: 1; transform: translateY(0); }
}

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .masthead__row { padding: 14px 0; }
  .masthead__firm { display: none; }
  .masthead__brand { margin-right: 0; }
  .langtoggle { order: 2; margin-left: auto; }
  .masthead__id { order: 3; width: 100%; text-align: left; margin-top: 2px; }
  .cover__grid { grid-template-columns: 1fr; }
  .plate { max-width: 240px; }
  .edu__list { grid-template-columns: 1fr; }
  .ledger__row { grid-template-columns: 1fr; gap: 6px; }
  .proof__grid { grid-template-columns: 1fr; }
  .signoff { grid-template-columns: 1fr; }
  .reach li { grid-template-columns: 78px 1fr; }
  .service-row { grid-template-columns: 32px 1fr; }
}