:root {
  --ink: #1a262c;
  --blue: #0f617b;
  --steel: #e9edeb;
  --paper: #f6f7f5;
  --line: #53707b;
  --line-soft: #cbd4d4;
  --muted: #587078;
  --signal: #db3b2f;
  --page: min(1260px, calc(100vw - 80px));
  --sans: "Apple SD Gothic Neo", "Noto Sans KR", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.55; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 12px; transform: translateY(-160%); padding: 10px 13px; background: var(--ink); color: #fff; }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }

.corporate-header { position: relative; border-top: 3px solid var(--signal); background: #fff; }
.header-top, .header-main { width: var(--page); margin: auto; }
.header-top { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid var(--line-soft); color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .08em; }
.header-top p { margin: 0; }
.header-main { display: grid; grid-template-columns: 1fr auto 1fr; gap: 30px; align-items: center; min-height: 80px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-size: 25px; font-weight: 800; letter-spacing: -.07em; line-height: 1; }
.brand i { width: 18px; height: 18px; border: 5px solid var(--signal); border-radius: 50%; }
.desktop-nav { display: flex; gap: 26px; font-size: 14px; font-weight: 800; }
.desktop-nav a { padding: 29px 0 26px; border-bottom: 3px solid transparent; }
.desktop-nav a:hover { border-color: var(--signal); }
.header-cta { justify-self: end; padding: 11px 0; color: var(--blue); font-size: 13px; font-weight: 800; }
.header-cta b { margin-left: 8px; color: var(--signal); }
.menu-button, .mobile-menu { display: none; }

.corporate-hero { display: grid; grid-template-columns: 1.05fr 1.08fr .67fr; width: var(--page); min-height: 600px; margin: auto; border-right: 1px solid var(--line-soft); border-left: 1px solid var(--line-soft); }
.hero-heading { padding: 76px 55px 68px 47px; border-bottom: 1px solid var(--line-soft); }
.section-label { margin: 0; color: var(--signal); font-size: 11px; font-weight: 900; letter-spacing: .1em; }
.hero-heading h1, .section-intro h2, .process-title h2, .materials-header h2, .contact-band h2 { margin: 20px 0 0; letter-spacing: -.075em; line-height: 1.12; }
.hero-heading h1 { font-size: clamp(39px, 4vw, 60px); font-weight: 800; }
.hero-heading > p:not(.section-label) { max-width: 31ch; margin: 32px 0 0; color: var(--muted); font-size: 16px; }
.text-link { display: inline-block; margin-top: 42px; padding-bottom: 7px; border-bottom: 2px solid var(--ink); font-size: 14px; font-weight: 800; }
.text-link b { margin-left: 11px; color: var(--signal); font-size: 19px; }
.hero-visual { position: relative; min-height: 600px; margin: 0; overflow: hidden; background: #b8c3c4; }
.hero-visual::after { position: absolute; inset: 0; background: linear-gradient(120deg, rgb(9 32 40 / .14), transparent 70%); content: ""; }
.hero-visual video { display: block; width: 100%; height: 100%; object-fit: cover; filter: saturate(.62) contrast(.96); }
.hero-visual figcaption, .process-image figcaption { position: absolute; right: 16px; bottom: 14px; z-index: 1; padding: 5px 7px; background: rgb(255 255 255 / .9); font-size: 10px; font-weight: 800; letter-spacing: .07em; }
.hero-panel { display: flex; flex-direction: column; justify-content: space-between; padding: 34px 25px 31px; background: var(--ink); color: #fff; }
.hero-panel > p { margin: 0; color: #a8c0c5; font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.hero-panel dl { margin: 40px 0; }
.hero-panel dl div { display: grid; grid-template-columns: 30px 1fr; gap: 10px; padding: 18px 0; border-top: 1px solid rgb(255 255 255 / .19); }
.hero-panel dt { color: var(--signal); font-size: 11px; font-weight: 900; }
.hero-panel dd { margin: 0; }
.hero-panel strong, .hero-panel span { display: block; }
.hero-panel strong { font-size: 15px; }
.hero-panel span { margin-top: 4px; color: #c9d7d9; font-size: 12px; }
.hero-panel > a { font-size: 13px; font-weight: 800; }
.hero-panel > a b { float: right; color: var(--signal); }

.business-section, .process-section, .materials-section { width: var(--page); margin: auto; }
.business-section { display: grid; grid-template-columns: .68fr 1.32fr; gap: 8vw; padding: 112px 0; }
.section-intro h2 { font-size: clamp(32px, 3.3vw, 46px); }
.section-intro > p:not(.section-label) { max-width: 28ch; margin: 25px 0 0; color: var(--muted); font-size: 15px; }
.business-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; border: 1px solid var(--line-soft); background: var(--line-soft); }
.business-card { display: flex; flex-direction: column; min-height: 330px; padding: 27px 25px; background: #fff; transition: background .2s ease, color .2s ease, transform .2s ease; }
.business-card:hover { z-index: 1; transform: translateY(-7px); background: var(--blue); color: #fff; }
.business-card span { color: var(--signal); font-size: 11px; font-weight: 900; }
.business-card h3 { margin: 73px 0 0; font-size: 26px; letter-spacing: -.06em; }
.business-card p { margin: 15px 0 0; font-size: 14px; line-height: 1.6; }
.business-card b { margin-top: auto; padding-top: 30px; font-size: 12px; }

.process-section { display: grid; grid-template-columns: .8fr 1fr 1fr; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.process-title { padding: 54px 34px 55px 0; }
.process-title h2 { font-size: clamp(31px, 3vw, 42px); }
.process-list { margin: 0; padding: 0; list-style: none; border-left: 1px solid var(--line-soft); }
.process-list li { display: grid; grid-template-columns: 56px 1fr; gap: 14px; min-height: 132px; padding: 23px 26px; border-bottom: 1px solid var(--line-soft); }
.process-list li:last-child { border-bottom: 0; }
.process-list span { color: var(--signal); font-size: 11px; font-weight: 900; }
.process-list strong { font-size: 16px; }
.process-list p { margin: 6px 0 0; color: var(--muted); font-size: 13px; }
.process-image { position: relative; min-height: 396px; margin: 0; overflow: hidden; background: #b8c3c4; }
.process-image img { display: block; width: 100%; height: 100%; object-fit: cover; filter: saturate(.55); }

.materials-section { padding: 112px 0 120px; }
.materials-header { display: grid; grid-template-columns: 1fr .65fr; gap: 9vw; }
.materials-header h2 { font-size: clamp(32px, 3.5vw, 48px); }
.materials-header > p { max-width: 28ch; margin: 38px 0 0; color: var(--muted); font-size: 15px; }
.material-tabs { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 60px; }
.material-tabs button { min-height: 39px; padding: 0 11px; border: 1px solid var(--line-soft); background: #fff; color: var(--blue); font-size: 11px; font-weight: 900; }
.material-tabs button:hover, .material-tabs button[aria-pressed="true"] { border-color: var(--signal); background: var(--signal); color: #fff; }
.material-tools { display: flex; align-items: center; justify-content: space-between; margin-top: 42px; font-size: 13px; font-weight: 800; }
.material-tools label { display: flex; align-items: center; gap: 12px; }
.material-tools input { width: 210px; height: 34px; padding: 0 10px; border: 1px solid var(--line-soft); border-radius: 0; background: #fff; }
.material-tools input:focus { border-color: var(--blue); outline: 2px solid rgb(15 97 123 / .16); outline-offset: 2px; }
.material-table { margin-top: 15px; overflow: auto; border: 1px solid var(--line-soft); background: #fff; }
.material-table table { width: 100%; border-collapse: collapse; text-align: left; }
.material-table th, .material-table td { padding: 19px 21px; border-bottom: 1px solid var(--line-soft); font-size: 14px; }
.material-table thead th { background: var(--ink); color: #fff; font-size: 13px; }
.material-table tbody th { width: 25%; color: var(--signal); }
.material-table tbody tr:last-child > * { border-bottom: 0; }
.material-empty td { padding: 35px !important; color: var(--muted); text-align: center; }
.table-footer { display: flex; justify-content: space-between; margin-top: 14px; color: var(--muted); font-size: 12px; }

.contact-band { display: grid; grid-template-columns: 1fr .58fr auto; gap: 8vw; align-items: end; width: var(--page); margin: 0 auto 90px; padding: 53px 48px; border-left: 5px solid var(--signal); background: var(--steel); }
.contact-band h2 { font-size: clamp(30px, 3vw, 42px); }
.contact-band > p { max-width: 30ch; margin: 0; color: var(--muted); font-size: 14px; }
.contact-band > a { padding-bottom: 7px; border-bottom: 2px solid var(--ink); font-size: 14px; font-weight: 900; white-space: nowrap; }
.contact-band > a b { margin-left: 10px; color: var(--signal); }
.corporate-footer { display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; padding: 58px max(40px, calc((100vw - 1260px) / 2)) 26px; background: var(--ink); color: #fff; }
.corporate-footer .brand i { border-color: var(--signal); }
.corporate-footer p { max-width: 40ch; margin: 17px 0 0; color: #b7c7c9; font-size: 12px; }
.corporate-footer nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; color: #d3dfe0; font-size: 13px; }
.corporate-footer small { grid-column: 1 / -1; padding-top: 25px; border-top: 1px solid rgb(255 255 255 / .18); color: #91a8ac; font-size: 10px; letter-spacing: .06em; }

@media (max-width: 1080px) {
  .header-main { grid-template-columns: 1fr auto; }
  .desktop-nav, .header-cta { display: none; }
  .menu-button { display: grid; place-content: center; gap: 6px; width: 48px; height: 48px; border: 0; background: transparent; }
  .menu-button span:not(.sr-only) { width: 23px; height: 2px; background: var(--ink); }
  .mobile-menu:not([hidden]) { display: block; position: absolute; z-index: 20; top: 113px; right: 0; left: 0; padding: 15px 40px 26px; border-bottom: 1px solid var(--line-soft); background: #fff; box-shadow: 0 16px 28px rgb(23 42 51 / .12); }
  .mobile-menu a { display: flex; align-items: center; justify-content: space-between; min-height: 47px; border-bottom: 1px solid var(--line-soft); font-weight: 800; }
  .mobile-menu b { color: var(--signal); font-size: 18px; }
  .mobile-menu .mobile-contact { display: block; margin-top: 18px; border: 0; background: var(--blue); color: #fff; text-align: center; line-height: 47px; }
  .corporate-hero { grid-template-columns: 1fr 1fr; }
  .hero-panel { display: grid; grid-column: 1 / -1; grid-template-columns: .7fr 2fr .7fr; gap: 28px; align-items: center; padding: 25px 34px; }
  .hero-panel dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0; }
  .hero-panel dl div { padding: 0; border-top: 0; }
  .business-section { grid-template-columns: 1fr; gap: 42px; }
  .process-section { grid-template-columns: 1fr 1fr; }
  .process-title { grid-column: 1 / -1; padding-right: 0; }
  .process-list { border-top: 1px solid var(--line-soft); }
  .process-image { min-height: 395px; }
  .contact-band { grid-template-columns: 1fr 1fr; }
  .contact-band > a { justify-self: start; }
}

@media (max-width: 720px) {
  :root { --page: calc(100vw - 48px); }
  .corporate-header { border-top: 0; }
  .header-top { display: none; }
  .header-main { min-height: 66px; }
  .brand { gap: 0; font-size: 18px; letter-spacing: -.06em; }
  .brand i { display: none; }
  .mobile-menu:not([hidden]) { top: 66px; padding: 14px 24px 23px; }
  .corporate-hero { display: block; border-right: 0; border-left: 0; }
  .hero-heading { padding: 42px 0 0; }
  .hero-heading h1 { font-size: 41px; line-height: 1.15; }
  .hero-heading > p:not(.section-label) { margin-top: 24px; font-size: 15px; }
  .text-link { margin-top: 31px; }
  .hero-visual { height: 255px; min-height: 0; }
  .hero-visual video { object-position: 35% center; }
  .hero-visual figcaption { display: none; }
  .hero-panel { display: block; padding: 23px 22px; }
  .hero-panel dl { display: block; margin: 25px 0; }
  .hero-panel dl div { padding: 15px 0; }
  .business-section { padding: 60px 0; }
  .section-intro h2, .process-title h2, .materials-header h2 { font-size: 29px; line-height: 1.16; }
  .business-grid { grid-template-columns: 1fr; margin-top: 0; }
  .business-card { min-height: 184px; padding: 22px 20px; }
  .business-card h3 { margin-top: 9px; font-size: 22px; }
  .business-card p { margin-top: 9px; font-size: 13px; }
  .business-card b { padding-top: 12px; }
  .process-section { display: block; }
  .process-title { padding: 60px 0 26px; }
  .process-list { border-top: 1px solid var(--line-soft); border-left: 0; }
  .process-list li { grid-template-columns: 42px 1fr; min-height: 0; padding: 20px 0; }
  .process-image { min-height: 185px; }
  .materials-section { padding: 60px 0; }
  .materials-header { grid-template-columns: 1fr; gap: 0; }
  .materials-header > p { margin: 21px 0 0; font-size: 15px; }
  .material-tabs { margin-top: 40px; }
  .material-tabs button { min-height: 36px; padding: 0 10px; text-align: center; }
  .material-tools { display: flex; flex-direction: column; align-items: stretch; gap: 12px; margin-top: 24px; }
  .material-tools label { order: -1; justify-content: space-between; margin: 0; }
  .material-tools input { width: 100%; height: 44px; }
  .material-table { margin-right: 0; margin-left: 0; }
  .material-table table { min-width: 0; table-layout: fixed; }
  .material-table th, .material-table td { padding: 13px 14px; vertical-align: top; font-size: 12px; }
  .table-footer { gap: 18px; font-size: 11px; }
  .contact-band { display: block; margin-bottom: 0; padding: 60px 24px; }
  .contact-band h2 { font-size: 31px; line-height: 1.18; }
  .contact-band > p { margin: 22px 0; }
  .corporate-footer { display: block; padding: 31px 24px 32px; }
  .corporate-footer nav, .corporate-footer small { display: none; }
}