/* ════════════════════════════════════════════
   VARIANT E — Swiss Minimal
   Müller-Brockmann grid / Takuya Onuki silence
   Pure White · Ink Black · Single Red accent
   ════════════════════════════════════════════ */

:root {
  --bg: #ffffff;
  --ink: #000000;
  --ink-soft: #1a1a1a;
  --ink-mute: #7a7a7a;
  --ink-faint: #b8b8b8;
  --red: #e63946;
  --rule: #000000;

  --sans: "Work Sans", "Inter", "Noto Sans KR", "Pretendard", sans-serif;
  --mono: "Work Sans", monospace;

  --max: 1440px;
  --gutter: clamp(24px, 4vw, 72px);
  --col-gap: clamp(16px, 2vw, 32px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: transparent; }

/* ─────────────────────────────────────────── */
/* NAV                                         */
/* ─────────────────────────────────────────── */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 24px var(--gutter);
  background: var(--bg);
  border-bottom: 1px solid var(--ink);
}
.nav__brand {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
}
.nav__brand sup { color: var(--red); font-size: 0.5em; margin-left: 2px; vertical-align: top; }
.nav__links {
  display: flex;
  gap: 2px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.nav__links a {
  padding: 6px 14px;
  border: 1px solid transparent;
}
.nav__links a:hover { color: var(--red); }
.nav__links a.is-active { border-color: var(--ink); }
.nav__meta {
  justify-self: end;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
@media (max-width: 860px) {
  .nav { grid-template-columns: 1fr auto; }
  .nav__meta { display: none; }
  .nav__links a { padding: 4px 8px; font-size: 10px; }
}

/* ─────────────────────────────────────────── */
/* GRID CONTAINER                              */
/* ─────────────────────────────────────────── */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
}
@media (max-width: 860px) {
  .grid-12 { grid-template-columns: repeat(6, 1fr); }
}

/* ─────────────────────────────────────────── */
/* HERO                                        */
/* ─────────────────────────────────────────── */
.hero {
  padding: 140px 0 80px;
}
.hero__ix {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  padding: 10px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.hero__ix span { padding: 0 4px; }
.hero__ix .red { color: var(--red); }

.hero__title {
  margin: 64px 0 0;
  font-weight: 700;
  font-size: clamp(64px, 12vw, 220px);
  line-height: 0.92;
  letter-spacing: -0.045em;
}
.hero__title .r { color: var(--red); }

.hero__bottom {
  margin-top: 64px;
}
.hero__bottom .col-1 {
  grid-column: 1 / span 2;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.hero__bottom .col-2 {
  grid-column: 3 / span 5;
  font-size: 18px;
  line-height: 1.5;
  max-width: 44ch;
}
.hero__bottom .col-3 {
  grid-column: 9 / span 4;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 860px) {
  .hero__bottom .col-1,
  .hero__bottom .col-2,
  .hero__bottom .col-3 { grid-column: 1 / -1; }
  .hero__bottom .col-3 { margin-top: 24px; }
}
.fact {
  border-top: 1px solid var(--ink);
  padding-top: 12px;
}
.fact .k {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.fact .v {
  font-weight: 700;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.02em;
}
.fact .v sup { color: var(--red); font-size: 0.55em; }
.fact .v .unit { color: var(--ink-mute); font-size: 0.4em; font-weight: 500; margin-left: 4px; }

/* ─────────────────────────────────────────── */
/* SECTION                                     */
/* ─────────────────────────────────────────── */
.section {
  padding: clamp(72px, 9vw, 140px) 0;
  border-top: 1px solid var(--ink);
}
.sec-head {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
  margin-bottom: 56px;
}
.sec-head .idx {
  grid-column: 1 / span 2;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--red);
  text-transform: uppercase;
}
.sec-head .title {
  grid-column: 3 / span 7;
  margin: 0;
  font-weight: 700;
  font-size: clamp(36px, 5vw, 72px);
  line-height: 1;
  letter-spacing: -0.03em;
}
.sec-head .meta {
  grid-column: 10 / span 3;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  align-self: end;
  text-align: right;
}
@media (max-width: 860px) {
  .sec-head { grid-template-columns: repeat(6, 1fr); gap: 12px; }
  .sec-head .idx { grid-column: 1 / -1; }
  .sec-head .title { grid-column: 1 / -1; }
  .sec-head .meta { grid-column: 1 / -1; text-align: left; }
}

/* ─────────────────────────────────────────── */
/* PROCESS GRID                                */
/* ─────────────────────────────────────────── */
.proc {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
  border-top: 1px solid var(--ink);
}
.proc article {
  grid-column: span 4;
  padding: 32px 0;
  border-bottom: 1px solid var(--ink);
}
@media (max-width: 860px) {
  .proc article { grid-column: 1 / -1; }
}
.proc .num {
  font-weight: 700;
  font-size: 56px;
  line-height: 1;
  margin-bottom: 24px;
}
.proc .num .r { color: var(--red); }
.proc h3 {
  font-weight: 700;
  font-size: 22px;
  line-height: 1.1;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.proc p {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 36ch;
}
.proc .rows {
  display: grid;
  gap: 6px;
  font-size: 12px;
  border-top: 1px solid var(--ink);
  padding-top: 14px;
}
.proc .rows .row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
}
.proc .rows .k {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ─────────────────────────────────────────── */
/* STATS BAR                                   */
/* ─────────────────────────────────────────── */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.stats > div {
  padding: 40px 20px;
  border-right: 1px solid var(--ink);
}
.stats > div:last-child { border-right: 0; }
@media (max-width: 860px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .stats > div:nth-child(2n) { border-right: 0; }
  .stats > div:nth-child(-n+2) { border-bottom: 1px solid var(--ink); }
}
.stats .k {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 18px;
}
.stats .v {
  font-weight: 700;
  font-size: clamp(44px, 5vw, 72px);
  line-height: 1;
  letter-spacing: -0.04em;
}
.stats .v sup { color: var(--red); font-size: 0.55em; }
.stats .v .unit { color: var(--ink-mute); font-size: 0.35em; font-weight: 500; margin-left: 4px; }

/* ─────────────────────────────────────────── */
/* MATERIALS (simple list)                     */
/* ─────────────────────────────────────────── */
.mats {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
  border-top: 1px solid var(--ink);
}
.mats li {
  grid-column: span 3;
  padding: 18px 0;
  border-bottom: 1px solid var(--ink);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-weight: 500;
}
.mats li .n {
  font-size: 11px;
  color: var(--red);
  font-weight: 500;
  letter-spacing: 0.2em;
}
.mats li .name {
  font-size: 18px;
  letter-spacing: -0.01em;
}
@media (max-width: 860px) {
  .mats li { grid-column: span 6; }
}
@media (max-width: 520px) {
  .mats li { grid-column: 1 / -1; }
}

/* ─────────────────────────────────────────── */
/* PLACEHOLDER                                 */
/* ─────────────────────────────────────────── */
.ph {
  border: 1px solid var(--ink);
  background: #fafafa;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  aspect-ratio: 4 / 3;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  position: relative;
}
.ph::before {
  content: "";
  position: absolute;
  inset: 50%;
  width: 1px;
  height: 1px;
  background: var(--ink-faint);
  box-shadow:
    -20px 0 0 var(--ink-faint),
    20px 0 0 var(--ink-faint),
    0 -20px 0 var(--ink-faint),
    0 20px 0 var(--ink-faint);
}
.ph__head { display: flex; justify-content: space-between; }
.ph__head .id { color: var(--red); }
.ph__foot { display: flex; justify-content: space-between; }
.ph--wide { aspect-ratio: 16 / 9; }
.ph--sq { aspect-ratio: 1 / 1; }
.ph--tall { aspect-ratio: 3 / 4; }

/* ─────────────────────────────────────────── */
/* TIMELINE                                    */
/* ─────────────────────────────────────────── */
.timeline {
  border-top: 1px solid var(--ink);
}
.tl-row {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
  padding: 28px 0;
  border-bottom: 1px solid var(--ink);
}
.tl-row .year {
  grid-column: 1 / span 2;
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  letter-spacing: -0.02em;
}
.tl-row .year sup { color: var(--red); font-size: 0.5em; font-weight: 500; }
.tl-row h4 {
  grid-column: 3 / span 4;
  margin: 0;
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.tl-row p {
  grid-column: 7 / span 6;
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}
@media (max-width: 860px) {
  .tl-row { grid-template-columns: repeat(6, 1fr); }
  .tl-row .year { grid-column: 1 / span 2; }
  .tl-row h4 { grid-column: 3 / span 4; }
  .tl-row p { grid-column: 1 / -1; }
}

/* ─────────────────────────────────────────── */
/* CLIENT / CERT                               */
/* ─────────────────────────────────────────── */
.grid-cells {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 1px solid var(--ink);
}
.grid-cells > div {
  aspect-ratio: 3 / 2;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.grid-cells > div:nth-child(6n) { border-right: 0; }
.grid-cells > div:nth-last-child(-n+6) { border-bottom: 0; }
.grid-cells > div strong {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--ink);
}
@media (max-width: 860px) {
  .grid-cells { grid-template-columns: repeat(3, 1fr); }
  .grid-cells > div { border-right: 1px solid var(--ink); }
  .grid-cells > div:nth-child(3n) { border-right: 0; }
  .grid-cells > div:nth-last-child(-n+3) { border-bottom: 0; }
}

/* ─────────────────────────────────────────── */
/* PAGE HEAD                                   */
/* ─────────────────────────────────────────── */
.pagehead {
  padding: 140px 0 60px;
}
.pagehead__meta {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
  padding: 10px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.pagehead__meta .left { grid-column: 1 / span 6; }
.pagehead__meta .right { grid-column: 7 / span 6; text-align: right; color: var(--ink-mute); }
@media (max-width: 860px) {
  .pagehead__meta .left, .pagehead__meta .right { grid-column: 1 / -1; text-align: left; }
}
.pagehead__title {
  margin: 56px 0 0;
  font-weight: 700;
  font-size: clamp(56px, 9vw, 160px);
  line-height: 0.92;
  letter-spacing: -0.045em;
}
.pagehead__title .r { color: var(--red); }
.pagehead__lede {
  margin-top: 32px;
  max-width: 48ch;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ─────────────────────────────────────────── */
/* TWO-COL ARTICLE                             */
/* ─────────────────────────────────────────── */
.article {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
  margin-top: 40px;
}
.article__left {
  grid-column: 1 / span 3;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
}
.article__right {
  grid-column: 4 / span 7;
}
.article__right h3 {
  font-weight: 700;
  font-size: 22px;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.article__right p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 58ch;
}
.article__right p + p { margin-top: 14px; }
@media (max-width: 860px) {
  .article__left, .article__right { grid-column: 1 / -1; }
}

/* ─────────────────────────────────────────── */
/* EQUIPMENT TABLE                             */
/* ─────────────────────────────────────────── */
.eq {
  border-top: 1px solid var(--ink);
}
.eq-row {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
  padding: 28px 0;
  border-bottom: 1px solid var(--ink);
}
.eq-row .id {
  grid-column: 1 / span 2;
  font-weight: 700;
  font-size: 44px;
  line-height: 1;
  letter-spacing: -0.03em;
}
.eq-row .id .r { color: var(--red); }
.eq-row h4 {
  grid-column: 3 / span 3;
  margin: 0;
  font-weight: 500;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.eq-row ul {
  grid-column: 6 / span 5;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--ink-soft);
}
.eq-row ul li {
  padding: 4px 0;
  border-bottom: 1px dashed var(--ink-faint);
}
.eq-row ul li:last-child { border-bottom: 0; }
.eq-row .status {
  grid-column: 11 / span 2;
  justify-self: end;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--ink);
  height: fit-content;
}
.eq-row .status.new { color: var(--red); border-color: var(--red); }
@media (max-width: 860px) {
  .eq-row { grid-template-columns: repeat(6, 1fr); }
  .eq-row .id { grid-column: 1 / span 2; }
  .eq-row h4 { grid-column: 3 / span 4; }
  .eq-row ul { grid-column: 1 / -1; }
  .eq-row .status { grid-column: 1 / span 2; justify-self: start; }
}

/* ─────────────────────────────────────────── */
/* FORM                                        */
/* ─────────────────────────────────────────── */
.form {
  display: grid;
  gap: 18px;
}
.form label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.form input, .form textarea, .form select {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ink);
  padding: 10px 0 12px;
  font: inherit;
  color: inherit;
  font-weight: 500;
  font-size: 18px;
}
.form textarea { resize: vertical; min-height: 110px; font-size: 16px; }
.form input:focus, .form textarea:focus, .form select:focus { outline: 0; border-bottom-color: var(--red); }
.form .submit {
  justify-self: start;
  margin-top: 8px;
  padding: 14px 28px;
  background: var(--ink);
  color: var(--bg);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  transition: background 0.2s ease;
}
.form .submit:hover { background: var(--red); }

/* ─────────────────────────────────────────── */
/* CTA                                         */
/* ─────────────────────────────────────────── */
.cta {
  padding: clamp(80px, 10vw, 160px) 0;
  border-top: 1px solid var(--ink);
}
.cta h2 {
  margin: 0;
  font-weight: 700;
  font-size: clamp(40px, 6vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 16ch;
}
.cta h2 .r { color: var(--red); }
.cta__row {
  margin-top: 40px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 16px 26px;
  border: 1px solid var(--ink);
  background: transparent;
}
.btn:hover { background: var(--ink); color: var(--bg); }
.btn--solid { background: var(--ink); color: var(--bg); }
.btn--solid:hover { background: var(--red); border-color: var(--red); }

/* ─────────────────────────────────────────── */
/* FOOTER                                      */
/* ─────────────────────────────────────────── */
.foot {
  border-top: 1px solid var(--ink);
  padding: 80px var(--gutter) 40px;
}
.foot__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--col-gap);
}
.foot__brand-col { grid-column: 1 / span 4; }
.foot__col { grid-column: span 2; }
.foot__col:first-of-type { grid-column: 5 / span 3; }
@media (max-width: 860px) {
  .foot__brand-col, .foot__col { grid-column: 1 / -1; }
}
.foot__brand {
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.foot__brand sup { color: var(--red); font-size: 0.5em; }
.foot p, .foot li { font-size: 13px; line-height: 1.7; color: var(--ink-soft); }
.foot ul { list-style: none; padding: 0; margin: 0; }
.foot h5 {
  margin: 0 0 14px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.foot a:hover { color: var(--red); }
.foot__bottom {
  max-width: var(--max);
  margin: 56px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}