/* ==========================================================================
   숨결 — 색상·서체·간격은 아래 변수만 바꾸면 사이트 전체에 적용됩니다.
   ========================================================================== */
:root {
  --deep: #16302b;
  --forest: #10241e;
  --moss: #2c4c3f;
  --sage: #8fa68e;
  --sage-deep: #4d6552;
  --sage-soft: #dfe4d4;
  --ivory: #f6f2e8;
  --paper: #fbf9f3;
  --ink: #1b2a24;
  --ink-soft: #4b5b53;
  --on-deep: #f6f2e8;
  --on-deep-soft: rgba(246, 242, 232, .8);
  --line: rgba(22, 48, 43, .16);
  --line-light: rgba(246, 242, 232, .22);

  --font-serif: "Noto Serif KR", "AppleMyungjo", "Batang", serif;
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;

  --gutter: clamp(1.5rem, 5vw, 5rem);
  --section: clamp(5rem, 11vw, 10rem);
  --ease: cubic-bezier(.2, .7, .2, 1);
  --header-h: 76px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.8;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }
main:focus { outline: 0; }

.wrap { width: 100%; max-width: 1480px; margin-inline: auto; padding-inline: var(--gutter); }
.sprite { position: absolute; }
.skip-link { position: fixed; top: -100px; left: 1rem; z-index: 200; padding: .6rem 1rem; background: var(--paper); color: var(--deep); }
.skip-link:focus { top: 1rem; }

/* Type ------------------------------------------------------------------ */
.display {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.8rem, 3.5vw, 3.2rem);
  line-height: 1.38;
  letter-spacing: -.025em;
}
.display--xl { font-size: clamp(1.95rem, 4.4vw, 4.1rem); line-height: 1.32; }
.eyebrow {
  display: flex;
  align-items: baseline;
  gap: .9rem;
  margin-bottom: clamp(1.25rem, 2.5vw, 2rem);
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--ink-soft);
}
.eyebrow__no { font-family: var(--font-serif); color: var(--sage-deep); }
.lead { max-width: 34em; margin-top: clamp(1.25rem, 2.5vw, 2rem); font-size: clamp(1.0625rem, 1.4vw, 1.2rem); color: var(--ink-soft); }
.prose { max-width: 36em; margin-top: clamp(1.5rem, 3vw, 2.5rem); color: var(--ink-soft); }
.prose p + p { margin-top: 1.25em; }
.subhead { font-family: var(--font-serif); font-weight: 400; font-size: clamp(1.35rem, 2vw, 1.7rem); letter-spacing: -.015em; line-height: 1.5; }

.tag {
  display: inline-block;
  flex: none;
  padding: .28em .85em;
  border: 1px solid var(--moss);
  border-radius: 99px;
  font-size: .8125rem;
  font-weight: 500;
  line-height: 1.5;
  white-space: nowrap;
  color: var(--moss);
}
.tag--plan { border-color: var(--sage); color: var(--sage-deep); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .6em 1.75em;
  border: 1px solid transparent;
  border-radius: 99px;
  background: none;
  color: inherit;
  font: inherit;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn[hidden] { display: none; }
.btn--light { background: var(--ivory); color: var(--deep); }
.btn--light:hover { background: var(--sage-soft); }
.btn--ghost { border-color: var(--on-deep-soft); color: var(--on-deep); }
.btn--ghost:hover { background: var(--ivory); border-color: var(--ivory); color: var(--deep); }

/* Header ---------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  color: var(--on-deep);
  transition: background .3s var(--ease), color .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.is-scrolled { background: var(--ivory); color: var(--deep); box-shadow: 0 1px 0 var(--line); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: .6rem; }
.brand__mark { flex: none; width: 28px; height: 28px; }
.brand__name { font-family: var(--font-serif); font-size: 1.4rem; font-weight: 500; letter-spacing: .04em; }
.brand__latin { font-size: .75rem; font-weight: 500; letter-spacing: .16em; }
.site-nav { display: flex; align-items: center; gap: clamp(1.25rem, 2.4vw, 2.5rem); font-size: .95rem; }
.site-nav a { position: relative; padding-block: .3rem; }
.site-nav a:not(.site-nav__cta)::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.site-nav a:hover::after, .site-nav a[aria-current]::after { transform: scaleX(1); }
.site-nav__cta { padding: .45rem 1.15rem !important; border: 1px solid currentColor; border-radius: 99px; }
.site-nav__cta:hover { opacity: .7; }
.nav-toggle { display: none; min-width: 48px; min-height: 48px; padding: 0 .2rem; border: 0; background: none; color: inherit; font: inherit; font-size: 1rem; text-align: right; cursor: pointer; }

/* Hero ------------------------------------------------------------------ */
.hero { position: relative; display: flex; align-items: flex-end; min-height: 100vh; min-height: 100svh; overflow: hidden; background: var(--forest); color: var(--on-deep); }
.hero__media { position: absolute; inset: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; object-position: 79% 58%; }
.hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(16, 36, 30, .8) 0%, rgba(16, 36, 30, .62) 50%, rgba(16, 36, 30, 0) 76%),
              linear-gradient(0deg, rgba(16, 36, 30, .82) 0%, rgba(16, 36, 30, 0) 42%);
}
.hero__content { position: relative; padding-block: calc(var(--header-h) + 2.5rem) clamp(2rem, 3.5vw, 3rem); }
.hero__eyebrow { color: var(--on-deep); }
.hero__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.2rem, 5.4vw, 5.2rem);
  line-height: 1.26;
  letter-spacing: -.03em;
}
.hero__lead { max-width: 37em; margin-top: clamp(1.25rem, 2.2vw, 2rem); font-size: clamp(1.0625rem, 1.35vw, 1.2rem); line-height: 1.75; color: var(--on-deep); }
.hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: .85rem; margin-top: clamp(1.5rem, 2.8vw, 2.5rem); }
.hero__facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  margin-top: clamp(2.5rem, 5vw, 4.5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-light);
  font-size: .95rem;
  line-height: 1.6;
}
.hero__facts strong { display: block; font-weight: 600; }
.hero__facts span { display: block; color: var(--on-deep-soft); }

/* Sections -------------------------------------------------------------- */
.section { padding-block: var(--section); }
.section--deep { background: var(--deep); color: var(--on-deep); }
.section--deep .eyebrow, .section--deep .lead { color: var(--on-deep-soft); }
.section--deep .eyebrow__no { color: var(--sage); }
.section--sage { background: var(--sage-soft); }

.media { position: relative; overflow: hidden; background: var(--sage-soft); }
.media img { width: 100%; height: 100%; object-fit: cover; }
.media--portrait { aspect-ratio: 4 / 5; }
.media--wide { aspect-ratio: 4 / 3; }
.media--band { aspect-ratio: 24 / 7; }

/* About */
.about__grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gutter); align-items: end; }
.about__text { grid-column: 1 / span 7; }
.about__media { grid-column: 9 / -1; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(2rem, 4vw, 4rem); margin-top: clamp(3.5rem, 7vw, 6.5rem); }
.principles li { padding-top: 1.5rem; border-top: 1px solid var(--line); }
.principles h3 { font-family: var(--font-serif); font-size: 1.25rem; font-weight: 500; letter-spacing: -.01em; line-height: 1.5; }
.principles p { margin-top: .75rem; color: var(--ink-soft); }

/* Problem */
.problem__grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gutter); align-items: start; }
.problem__aside { grid-column: 1 / span 6; }
.problem__media { margin-top: clamp(2.5rem, 5vw, 4rem); background: var(--moss); }
.issues { grid-column: 8 / -1; }
.issues li { padding-block: clamp(2rem, 3.5vw, 3rem); border-top: 1px solid var(--line-light); }
.issues li:last-child { border-bottom: 1px solid var(--line-light); }
.issues__no, .step__no { font-family: var(--font-serif); font-size: .95rem; }
.issues__no { color: var(--sage); }
.issues h3 { margin-top: .6rem; font-family: var(--font-serif); font-size: clamp(1.3rem, 2vw, 1.7rem); font-weight: 400; letter-spacing: -.015em; line-height: 1.45; }
.issues p { margin-top: .8rem; color: var(--on-deep-soft); }

/* Solution */
.solution__grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gutter); align-items: center; }
.solution__media { grid-column: 1 / span 5; }
.solution__text { grid-column: 7 / -1; }
.approach { margin-top: clamp(2rem, 3.5vw, 3rem); }
.approach li { display: grid; grid-template-columns: 7.5rem 1fr; gap: 1rem; padding-block: 1.1rem; border-top: 1px solid var(--line); }
.approach strong { font-family: var(--font-serif); font-weight: 500; }
.approach span { color: var(--ink-soft); }
.paths__head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 3rem; margin-top: clamp(4.5rem, 8vw, 7.5rem); padding-bottom: 1.5rem; border-bottom: 1px solid var(--deep); }
.status-note { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .9rem; font-size: .95rem; color: var(--ink-soft); }
.paths { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(2rem, 4vw, 4rem); margin-top: clamp(2rem, 3.5vw, 3rem); }
.paths__icon { display: block; }
.paths__icon svg { width: 44px; height: 44px; fill: none; stroke: var(--moss); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.paths h4 { margin-top: 1.25rem; font-family: var(--font-serif); font-size: 1.3rem; font-weight: 500; letter-spacing: -.01em; line-height: 1.5; }
.paths p { margin-top: .7rem; color: var(--ink-soft); }

/* Process */
.process__head { max-width: 46rem; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); }
.process__grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gutter); align-items: start; }
.ring-wrap { grid-column: 1 / span 6; position: sticky; top: calc(var(--header-h) + 4vh); }
.ring { width: 100%; max-height: calc(100vh - var(--header-h) - 8vh); overflow: visible; }
.ring__track, .ring__progress { fill: none; stroke-width: 1.5; }
.ring__track { stroke: rgba(22, 48, 43, .25); }
.ring__progress { stroke: var(--deep); stroke-width: 2.5; stroke-dasharray: 100; stroke-dashoffset: 0; stroke-linecap: round; transition: stroke-dashoffset .6s var(--ease); }
.ring__node circle { fill: var(--sage-soft); stroke: var(--deep); stroke-width: 1.5; transition: fill .3s var(--ease); }
.ring__node text { font-family: var(--font-sans); font-size: 15px; font-weight: 500; fill: var(--deep); transition: fill .3s var(--ease); }
.ring__node.is-done circle { fill: var(--deep); }
.ring__node.is-done text { fill: var(--ivory); }
.ring__no { font-family: var(--font-serif); font-size: 58px; font-weight: 400; letter-spacing: -.02em; fill: var(--deep); }
.ring__label { font-family: var(--font-sans); font-size: 20px; fill: var(--ink-soft); }
.steps { grid-column: 8 / -1; }
.step { padding-block: clamp(1.75rem, 3.5vw, 2.75rem); border-top: 1px solid var(--line); }
.step__no { color: var(--sage-deep); }
.step h3 { margin-top: .4rem; font-family: var(--font-serif); font-size: clamp(1.4rem, 2.3vw, 1.95rem); font-weight: 400; letter-spacing: -.02em; line-height: 1.4; }
.step p { margin-top: .75rem; max-width: 31em; color: var(--ink-soft); }

/* R&D */
.rnd { background: var(--paper); }
.rnd__intro { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gutter); align-items: end; margin-bottom: clamp(3.5rem, 7vw, 6rem); }
.rnd__intro > div { grid-column: 1 / span 7; }
.rnd__media { grid-column: 8 / -1; }
.board + .board { margin-top: clamp(3.5rem, 6vw, 5rem); }
.board .subhead { padding-bottom: 1.25rem; border-bottom: 1px solid var(--deep); }
.board__list li {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 6fr) 9rem;
  gap: .5rem clamp(1.5rem, 4vw, 4rem);
  align-items: baseline;
  padding-block: clamp(1.4rem, 2.3vw, 1.9rem);
  border-bottom: 1px solid var(--line);
}
.board__list h4 { font-family: var(--font-serif); font-size: clamp(1.15rem, 1.6vw, 1.3rem); font-weight: 500; letter-spacing: -.01em; line-height: 1.5; }
.board__list p { color: var(--ink-soft); }
.board__list .tag { justify-self: end; }
.disclosure { margin-top: clamp(2rem, 3.5vw, 3rem); font-size: .95rem; color: var(--ink-soft); }

/* Vision */
.vision { overflow: hidden; }
.vision__media { position: relative; margin-top: clamp(1rem, 2vw, 2rem); }
.vision__media img { width: 100%; height: clamp(240px, 40vw, 620px); object-fit: cover; }
.vision__media::before, .vision__media::after { content: ""; position: absolute; left: 0; right: 0; height: 18%; pointer-events: none; }
.vision__media::before { top: 0; background: linear-gradient(180deg, var(--deep), transparent); }
.vision__media::after { bottom: 0; background: linear-gradient(0deg, var(--deep), transparent); }
.vision__note { margin-top: clamp(1.5rem, 3vw, 2.5rem); color: var(--on-deep-soft); }
.commitments { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(2rem, 4vw, 4rem); margin-top: clamp(1.75rem, 3vw, 2.5rem); }
.commitments li { padding-top: 1.5rem; border-top: 1px solid var(--line-light); }
.commitments h3 { font-family: var(--font-serif); font-size: clamp(1.4rem, 2.2vw, 1.8rem); font-weight: 400; line-height: 1.4; }
.commitments p { margin-top: .7rem; color: var(--on-deep-soft); }

/* Contact */
.contact { padding-bottom: 0; }
.contact__grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gutter); align-items: start; }
.contact__text { grid-column: 1 / span 6; }
.partners { margin-top: clamp(2rem, 3.5vw, 3rem); }
.partners li { display: grid; grid-template-columns: 9.5rem 1fr; gap: 1rem; padding-block: .95rem; border-top: 1px solid var(--line); }
.partners strong { font-weight: 600; }
.partners span { color: var(--ink-soft); }
.contact-card { grid-column: 8 / -1; padding: clamp(1.75rem, 3.5vw, 3rem); background: var(--deep); color: var(--on-deep); }
.contact-card__label { font-size: .95rem; font-weight: 500; color: var(--on-deep-soft); }
.contact-card__label--sub { margin-top: clamp(1.5rem, 3vw, 2.25rem); padding-top: clamp(1.5rem, 3vw, 2.25rem); border-top: 1px solid var(--line-light); }
.contact-card__email {
  display: block;
  margin-top: .4rem;
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.1vw, 1.85rem);
  line-height: 1.5;
  overflow-wrap: anywhere;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}
.contact-card__actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
.contact-card__status { min-height: 1.6em; margin-top: .6rem; font-size: .95rem; color: var(--on-deep-soft); }
.contact-card__list { margin-top: .75rem; }
.contact-card__list li { padding-block: .3rem; }
.contact__media { margin-top: var(--section); }

/* Footer */
.site-footer { padding-block: clamp(2.5rem, 4vw, 3.5rem); background: var(--forest); color: var(--on-deep-soft); font-size: .95rem; }
.site-footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem 2.5rem; }
.site-footer__brand { display: flex; align-items: center; gap: .55rem; font-family: var(--font-serif); font-size: 1.2rem; color: var(--on-deep); }
.site-footer__brand .brand__latin { font-family: var(--font-sans); }
.site-footer a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .22em; }
.site-footer a:hover { color: var(--on-deep); }

/* 404 */
.error-page { display: flex; flex-direction: column; justify-content: center; min-height: 100vh; min-height: 100svh; background: var(--deep); color: var(--on-deep); }
.error-page .eyebrow { color: var(--on-deep-soft); }
.error-page .lead { color: var(--on-deep-soft); }
.error-page .btn { margin-top: 2rem; }

.br-wide { display: inline; }

/* Scroll animation — JS가 동작할 때만 숨기므로 JS가 꺼져도 내용은 그대로 보입니다. */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }
.js .hero__content { animation: fade .8s var(--ease) both; }
@keyframes fade { from { opacity: 0; } }

/* 이미지 위치 확인 모드: 주소 끝에 ?slots=1 */
.show-slots [data-slot] { outline: 2px dashed #fff; outline-offset: -8px; }
.show-slots [data-slot]::before {
  content: attr(data-slot);
  position: absolute;
  z-index: 5;
  top: 16px;
  left: 16px;
  padding: .2em .7em;
  background: #fff;
  color: #000;
  font: 600 14px/1.6 monospace;
}
.show-slots .hero__media::before { top: calc(var(--header-h) + 8px); }

/* Responsive ------------------------------------------------------------ */
@media (max-width: 1000px) {
  :root { --header-h: 64px; }
  .site-nav {
    position: fixed;
    inset: 0;
    z-index: -1;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: .5rem;
    padding-inline: var(--gutter);
    overflow-y: auto;
    background: var(--deep);
    color: var(--on-deep);
    font-family: var(--font-serif);
    font-size: 1.5rem;
    visibility: hidden;
    opacity: 0;
    transition: opacity .25s var(--ease), visibility .25s;
  }
  .site-nav.is-open { opacity: 1; visibility: visible; }
  .site-nav a { padding-block: .4rem; }
  .site-nav__cta { margin-top: .75rem; font-size: 1.05rem; font-family: var(--font-sans); }
  .nav-toggle { display: block; position: relative; z-index: 1; }
  .nav-open .site-header { background: transparent; color: var(--on-deep); box-shadow: none; }

  /* 좁은 화면에서는 이미지를 글자 위쪽에 두고, 글자 뒤에 어두운 막을 깔아 대비를 확보합니다. */
  .hero__media img { height: 62%; }
  .hero__media::after { background: linear-gradient(0deg, var(--forest) 38%, rgba(16, 36, 30, 0) 62%); }
  .hero__content { isolation: isolate; }
  .hero__content::before {
    content: "";
    position: absolute;
    inset: calc(var(--header-h) - 2.5rem) 0 0;
    z-index: -1;
    background: linear-gradient(0deg, rgba(16, 36, 30, .9) calc(100% - 5rem), rgba(16, 36, 30, 0));
  }

  .about__text, .about__media, .problem__aside, .issues, .solution__media, .solution__text,
  .ring-wrap, .steps, .rnd__intro > div, .rnd__media, .contact__text, .contact-card { grid-column: 1 / -1; }
  .about__media { order: -1; }
  .about__media, .solution__media { aspect-ratio: 16 / 10; }
  .issues { margin-top: .5rem; }

  /* 좁은 화면에서는 순환 다이어그램을 전체 상태로 고정합니다. */
  .ring-wrap { position: static; width: 100%; max-width: 380px; margin-inline: auto; }
  .ring { max-height: none; }
  .ring__progress { stroke-dashoffset: 0 !important; }
  .ring__node circle { fill: var(--deep); }
  .ring__node text { fill: var(--ivory); font-size: 19px; }
  .ring__label { font-size: 25px; }
}

@media (max-width: 720px) {
  body { font-size: 1rem; }
  .br-wide { display: none; }
  .brand__latin { display: none; }
  .site-footer__brand .brand__latin { display: inline; }
  .hero__media img { height: 45%; }
  .hero__media::after { background: linear-gradient(0deg, var(--forest) 55%, rgba(16, 36, 30, 0) 72%); }
  .hero__content::before { inset: calc(var(--header-h) - .5rem) 0 0; background: linear-gradient(0deg, rgba(16, 36, 30, .9) calc(100% - 3rem), rgba(16, 36, 30, 0)); }
  .hero__facts { grid-template-columns: 1fr; gap: .7rem; margin-top: 2rem; padding-top: 1rem; }
  .hero__facts li { display: grid; grid-template-columns: 6.5rem 1fr; gap: .5rem; }
  .hero__actions .btn { flex: 1 1 9rem; padding-inline: 1em; }
  .principles, .paths, .commitments { grid-template-columns: 1fr; }
  .board__list li { grid-template-columns: 1fr; gap: .35rem; }
  .board__list .tag { justify-self: start; margin-top: .4rem; }
  .approach li, .partners li { grid-template-columns: 1fr; gap: .1rem; }
  .media--band { aspect-ratio: 16 / 7; }
  .contact-card__actions .btn { flex: 1 1 100%; }
  .site-footer__inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}