:root {
  color-scheme: light;
  --ink: #101010;
  --paper: #fff;
  --off-white: #f4f4f2;
  --subtle: #60605d;
  --line: #deded9;
  --dark-line: #333330;
  --sans: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --display: "Arial Black", "Helvetica Neue", Arial, var(--sans);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-height: 74px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); word-break: keep-all; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
button, textarea { font: inherit; }
button, summary { cursor: pointer; }
button { color: inherit; }
p, h1, h2, h3, dl, dd { margin: 0; }
:focus-visible { outline: 2px solid currentColor; outline-offset: 5px; }
main:focus, section:focus { outline: none; }
.frame { width: min(1220px, calc(100% - 112px)); margin-inline: auto; }
.label { font: 700 11px/1.45 var(--mono); letter-spacing: .13em; }
.skip {
  position: fixed; z-index: 20; top: 12px; left: 12px; padding: 12px 18px;
  background: white; color: var(--ink); transform: translateY(-170%);
}
.skip:focus { transform: none; }

.site-header { position: sticky; top: 0; z-index: 10; background: var(--ink); color: white; border-bottom: 1px solid var(--dark-line); }
.header-inner { min-height: var(--header-height); display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; gap: 11px; align-items: center; min-height: 44px; flex-shrink: 0; }
.brand-symbol, .board-mark { background: currentColor; mask: url("assets/monogram.svg") center / contain no-repeat; }
.brand-symbol { width: 32px; height: 20px; }
.brand-wordmark { width: 83px; height: auto; filter: invert(1); }
.navigation { display: flex; align-items: center; gap: clamp(19px, 3.1vw, 46px); }
.navigation a { min-height: 44px; display: inline-flex; align-items: center; gap: 14px; font-size: 13px; font-weight: 700; color: #deded9; }
.navigation a:hover { color: white; text-decoration: underline; text-underline-offset: 5px; }
.navigation .nav-contact { color: white; border: 1px solid #565652; padding: 0 15px; }
.navigation .nav-contact:hover { text-decoration: none; background: white; color: var(--ink); }
.menu-toggle { display: none; }

.hero { background: var(--ink); color: white; }
.hero-body { padding: 82px 0 77px; display: grid; grid-template-columns: 1.25fr 1fr; align-items: center; gap: clamp(28px, 5vw, 78px); }
.hero-copy { min-width: 0; }
.hero-label { display: flex; align-items: center; gap: 10px; color: #bebeb8; }
.square { width: 7px; height: 7px; background: white; }
.hero h1 {
  margin: 23px 0 26px; font: 900 clamp(42px, 7.3vw, 104px)/.98 var(--display);
  letter-spacing: -.086em; white-space: nowrap;
}
.hero h1 span { color: #9e9e98; }
.hero-tagline { font-size: clamp(17px, 1.88vw, 25px); line-height: 1.5; font-weight: 800; letter-spacing: -.045em; }
.hero-description { color: #b9b9b3; font-size: 15px; line-height: 1.72; margin-top: 13px; }
.hero-actions { display: flex; align-items: center; gap: clamp(17px, 3vw, 36px); margin-top: 31px; flex-wrap: wrap; }
.button { min-height: 51px; display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 18px; border: 1px solid transparent; font-size: 14px; font-weight: 800; }
.button-light { background: white; color: var(--ink); }
.button-light:hover { background: #dcdcd6; }
.button-light:focus-visible { outline-color: white; }
.text-link, .back-top { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; font-size: 13px; font-weight: 700; }
.text-link:hover, .back-top:hover { text-decoration: underline; text-underline-offset: 5px; }
.text-link span { color: #b9b9b3; }

.identity-board {
  aspect-ratio: 1.08; min-width: 0; display: grid; grid-template-rows: auto 1fr auto;
  background: #151515; border: 1px solid #40403d; padding: clamp(16px, 2.4vw, 33px);
}
.board-top, .board-bottom { display: flex; justify-content: space-between; gap: 8px; color: #9d9d96; font-size: 10px; }
.board-inner {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10%; margin: 15px 0; color: #fafaf8;
  background-image: linear-gradient(to right, #ffffff0e 1px, transparent 1px), linear-gradient(to bottom, #ffffff0e 1px, transparent 1px);
  background-size: 12.5% 16.6667%; border-right: 1px solid #ffffff0e; border-bottom: 1px solid #ffffff0e;
}
.board-mark { width: 41%; aspect-ratio: 1.64; }
.board-wordmark { display: block; width: 61%; height: auto; filter: invert(1); }
.corner { width: 13px; height: 13px; position: absolute; border: solid #95958c; border-width: 0; }
.top-left { top: 0; left: 0; border-top-width: 1px; border-left-width: 1px; }
.top-right { top: 0; right: 0; border-top-width: 1px; border-right-width: 1px; }
.bottom-left { bottom: 0; left: 0; border-bottom-width: 1px; border-left-width: 1px; }
.bottom-right { bottom: 0; right: 0; border-bottom-width: 1px; border-right-width: 1px; }
.hero-index { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--dark-line); color: #bdbdb7; }
.hero-index span { padding: 20px 0; }
.hero-index span + span { border-left: 1px solid var(--dark-line); padding-left: 21px; }
.hero-index b { margin-right: 9px; color: #f3f3f1; }

.section { padding-block: clamp(70px, 8.3vw, 124px); }
.section-grid { display: grid; grid-template-columns: minmax(157px, 1fr) minmax(0, 3.2fr); gap: 32px; }
.section-index { padding-top: 12px; color: var(--subtle); }
.section-index span { color: var(--ink); }
.section h2 { font-size: clamp(36px, 5.5vw, 76px); line-height: 1.13; font-weight: 900; letter-spacing: -.075em; }
.intro { margin-top: 24px; max-width: 670px; color: var(--subtle); font-size: clamp(16px, 1.45vw, 20px); line-height: 1.78; letter-spacing: -.024em; }
.intro + .intro { margin-top: 14px; }

.capabilities { background: var(--off-white); border-block: 1px solid var(--line); }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid #cfcfc9; margin-top: 47px; }
.capability { padding: clamp(19px, 2.75vw, 38px); }
.capability + .capability { border-left: 1px solid #cfcfc9; }
.capability-top { display: flex; align-items: start; justify-content: space-between; gap: 12px; color: var(--subtle); }
.capability-top svg { width: 53px; height: 53px; fill: none; stroke: var(--ink); stroke-width: 2.25; stroke-linejoin: round; stroke-linecap: square; }
.capability h3, .partner-card h3 { font-size: clamp(20px, 2.45vw, 34px); letter-spacing: -.055em; line-height: 1.2; margin: 32px 0 12px; }
.capability p, .partner-card p { color: var(--subtle); font-size: 15px; line-height: 1.73; letter-spacing: -.02em; }

.partner-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 44px; }
.partner-card { display: flex; flex-direction: column; background: #f7f7f6; border: 1px solid var(--line); padding: clamp(23px, 3.3vw, 43px); }
.partner-card:nth-child(2) { background: var(--ink); border-color: var(--ink); color: white; }
.partner-card:nth-child(2) p { color: #c7c7c1; }
.partner-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.partner-top span:last-child { opacity: .65; }
.partner-card h3 { margin-top: 30px; }
.partner-card p { margin-bottom: 25px; }
.partner-example { margin-top: auto; padding-top: 15px; border-top: 1px solid var(--line); display: flex; gap: 11px; font-size: 13px; line-height: 1.6; }
.partner-example .label { flex-shrink: 0; letter-spacing: 0; padding-top: 2px; }
.partner-card:nth-child(2) .partner-example { border-color: #444440; }
.process { padding: 0; margin: 37px 0 0; list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.process li { border-top: 1px solid #999993; padding-top: 15px; }
.process .label { color: var(--subtle); }
.process h3 { margin: 13px 0 5px; font-size: 17px; letter-spacing: -.035em; }
.process p { color: var(--subtle); font-size: 13px; line-height: 1.55; }

.contact { background: var(--ink); color: white; }
.contact .section-index { color: #b8b8b2; }
.contact .section-index span { color: white; }
.contact .intro { color: #c6c6c1; }
.contact-content { min-width: 0; }
.contact-panel { border: 1px solid #4a4a46; background: #171717; max-width: 670px; margin-top: 35px; padding: clamp(16px, 3vw, 29px); }
.email-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.email-row .label { color: #b8b8b2; }
.email-row h3 { margin-top: 8px; font-size: 19px; letter-spacing: -.025em; }
.status { border: 1px solid #62625d; color: #e1e1dc; padding: 7px 11px; font-size: 12px; font-weight: 700; }
.email-link { text-decoration: underline; text-underline-offset: 4px; overflow-wrap: anywhere; }
#contact-note { color: #c6c6c1; font-size: 14px; line-height: 1.65; margin: 16px 0; }
.inquiry-details { border-top: 1px solid #4a4a46; }
.inquiry-details summary { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 49px; padding-top: 4px; list-style: none; font-size: 14px; font-weight: 800; }
.inquiry-details summary::-webkit-details-marker { display: none; }
.inquiry-details summary:hover { text-decoration: underline; text-underline-offset: 4px; }
.inquiry-details summary span::before { content: "+"; font: 400 22px/1 var(--mono); }
.inquiry-details[open] summary span::before { content: "−"; }
.inquiry-body { display: grid; justify-items: start; gap: 12px; }
.inquiry-body label { font-size: 13px; color: #c6c6c1; }
.inquiry-body textarea { width: 100%; padding: 13px; border: 1px solid #575751; border-radius: 0; background: #101010; color: white; line-height: 1.55; resize: vertical; word-break: normal; }
#copy-status { font-size: 13px; color: #e3e3df; line-height: 1.55; }
#copy-status:empty { margin-top: -12px; }

.site-footer { color: white; background: var(--ink); border-top: 1px solid var(--dark-line); }
.footer-inner { min-height: 100px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.site-footer p { color: #b8b8b2; }

@media (max-width: 1050px) {
  .frame { width: calc(100% - 72px); }
  .hero-body { padding-block: 70px; }
}
@media (max-width: 760px) {
  :root { --header-height: 62px; }
  .frame { width: calc(100% - 40px); }
  .header-inner { flex-wrap: wrap; gap: 0 12px; }
  .menu-toggle { display: inline-flex; gap: 10px; align-items: center; justify-content: center; min-height: 44px; min-width: 64px; padding: 0 2px 0 8px; border: 0; background: none; color: white; font-size: 13px; font-weight: 800; }
  .menu-icon { position: relative; width: 17px; height: 14px; }
  .menu-icon::before, .menu-icon::after { content: ""; position: absolute; left: 0; top: 3px; width: 100%; height: 1px; background: white; }
  .menu-icon::after { top: 10px; }
  .menu-toggle[aria-expanded="true"] .menu-icon::before { top: 7px; transform: rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-icon::after { top: 7px; transform: rotate(-45deg); }
  .navigation { width: 100%; display: grid; gap: 0; padding-bottom: 12px; }
  .navigation a, .navigation .nav-contact { border: 0; border-top: 1px solid var(--dark-line); min-height: 48px; padding: 0 6px; }
  .hero-body { grid-template-columns: 1fr; gap: 34px; padding: 55px 0 29px; }
  .hero h1 { font-size: clamp(36px, 12vw, 85px); margin: 20px 0 22px; }
  .hero-tagline { font-size: 19px; }
  .hero-description { font-size: 14px; margin-top: 11px; }
  .desktop-break { display: none; }
  .hero-actions { margin-top: 23px; }
  .identity-board { width: 100%; max-width: 520px; aspect-ratio: 1.44; }
  .board-mark { width: 31%; }
  .board-wordmark { width: 49%; }
  .hero-index { grid-template-columns: 1.03fr .97fr 1fr; letter-spacing: .02em; font-size: 9px; }
  .hero-index span { padding: 12px 2px 12px 0; }
  .hero-index span + span { padding-left: 8px; }
  .hero-index b { display: block; margin: 0 0 3px; }
  .section { padding-block: 66px; }
  .section-grid { grid-template-columns: 1fr; gap: 15px; }
  .section-index { padding-top: 0; }
  .intro { margin-top: 16px; }
  .capability-grid { grid-template-columns: 1fr; margin-top: 28px; }
  .capability + .capability { border-left: 0; border-top: 1px solid #cfcfc9; }
  .capability h3 { margin-top: 7px; }
  .capability-top svg { width: 43px; height: 43px; }
  .partner-grid { grid-template-columns: 1fr; margin-top: 28px; }
  .process { grid-template-columns: 1fr 1fr; row-gap: 23px; margin-top: 28px; }
  .contact-panel { margin-top: 23px; }
  .footer-inner { min-height: 92px; flex-wrap: wrap; gap: 0 14px; padding-block: 10px; }
  .site-footer p { order: 3; width: 100%; margin-bottom: 8px; }
}
@media (max-width: 370px) {
  .frame { width: calc(100% - 32px); }
  .hero-tagline { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}