:root {
  --bg: #050505;
  --ink: #f6f6f4;
  --muted: #9a9a94;
  --line: rgba(255, 255, 255, 0.1);
  --panel: #0d0d0d;
  --cream: #efe7d6;
  --sans: "Instrument Sans", "Noto Sans KR", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
}
html[lang="ko"] body { word-break: keep-all; letter-spacing: 0.01em; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 11px 24px;
  background: var(--cream);
  color: #16140f;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.banner i { font-style: normal; }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 5vw;
  background: rgba(5, 5, 5, 0.78);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
}
.brand img { width: 32px; height: 32px; border-radius: 50%; }

.nav-sheet {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--ink); }

.lang {
  display: flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.lang button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 12px;
}
.lang button.is-on { background: #fff; color: #111; font-weight: 700; }

.menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background:
    linear-gradient(#fff, #fff) 11px 15px / 18px 1.5px no-repeat,
    linear-gradient(#fff, #fff) 11px 20px / 18px 1.5px no-repeat,
    linear-gradient(#fff, #fff) 11px 25px / 18px 1.5px no-repeat,
    transparent;
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-solid { background: #fff; color: #111; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.22); }

.hero {
  padding: 12vh 8vw 10vh;
  max-width: 1280px;
}
.hero h1 {
  margin: 0 0 28px;
  max-width: 16ch;
  font-size: clamp(48px, 8.4vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.045em;
  font-weight: 700;
}
html[lang="ko"] .hero h1 {
  max-width: 10em;
  letter-spacing: -0.03em;
  line-height: 1.12;
}
.lede {
  margin: 0 0 36px;
  max-width: 34em;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.45;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.logos {
  padding: 0 0 80px;
  border-top: 1px solid var(--line);
}
.logos p {
  margin: 36px 8vw 22px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track {
  display: flex;
  gap: 56px;
  width: max-content;
  animation: slide 36s linear infinite;
  color: rgba(255,255,255,0.42);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
@keyframes slide {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.section { padding: 0 8vw 120px; }
.kicker {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.section h2 {
  margin: 0 0 40px;
  max-width: 14em;
  font-size: clamp(32px, 4.6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 700;
}
html[lang="ko"] .section h2 { letter-spacing: -0.02em; line-height: 1.22; }

.is-grid, .start-grid, .biz-grid, .kpis, .steps, .stack {
  list-style: none;
  margin: 0;
  padding: 0;
}

.is-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.is-grid li {
  min-height: 260px;
  padding: 32px 28px;
  background: var(--bg);
}
.is-grid h3 { margin: 0 0 16px; font-size: 22px; letter-spacing: -0.02em; }
.is-grid p { margin: 0; color: var(--muted); }

.kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0 8vw 120px;
  background: var(--line);
  border: 1px solid var(--line);
}
.kpis li { padding: 28px; background: var(--bg); }
.kpis b { display: block; font-size: 32px; letter-spacing: -0.04em; }
.kpis span { color: var(--muted); font-size: 13px; }

.stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.stack li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  min-height: 150px;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.stack i {
  font-style: normal;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
}
.stack h3 { margin: 0 0 10px; font-size: 22px; }
.stack p { margin: 0; color: var(--muted); }

.biz-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.biz-grid article {
  min-height: 240px;
  padding: 36px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.biz-grid h3 { margin: 0 0 16px; font-size: 36px; letter-spacing: -0.03em; }
.biz-grid p { margin: 0; color: var(--muted); font-size: 18px; }

.start-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.start-grid a {
  position: relative;
  min-height: 220px;
  padding: 32px;
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color .2s ease, transform .2s ease;
}
.start-grid a:hover {
  border-color: rgba(255,255,255,0.28);
  transform: translateY(-2px);
}
.start-grid h3 { margin: 0 0 12px; font-size: 28px; letter-spacing: -0.03em; }
.start-grid p { margin: 0; color: var(--muted); max-width: 28em; }
.start-grid span {
  position: absolute;
  right: 28px;
  bottom: 24px;
  color: var(--muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.steps li {
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.steps li.on { border-color: rgba(255,255,255,0.32); }
.steps span { color: var(--muted); font-size: 13px; letter-spacing: 0.06em; }
.steps h3 { margin: 12px 0 10px; font-size: 24px; }
.steps p { margin: 0; color: var(--muted); }

.addr {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  max-width: 920px;
  padding: 12px 12px 12px 20px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.addr code { flex: 1; word-break: break-all; font-size: 15px; }
.note { color: var(--muted); font-size: 14px; }

.foot {
  padding: 56px 8vw 40px;
  border-top: 1px solid var(--line);
}
.foot-top {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.foot-brand strong { font-size: 22px; letter-spacing: 0.14em; }
.foot-brand p, .foot a, .legal { color: var(--muted); }
.foot-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.foot-cols b { display: block; margin-bottom: 14px; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }
.foot-cols a { display: block; margin: 8px 0; }
.legal { font-size: 13px; }

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  color: #111;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 700;
  z-index: 40;
}

@media (max-width: 900px) {
  .menu-btn { display: block; }
  .nav-sheet {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 18px 5vw 24px;
    background: #080808;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-sheet.open { display: flex; }
  .hero { padding: 8vh 6vw 8vh; }
  .section, .kpis { padding-left: 6vw; padding-right: 6vw; }
  .kpis { margin-left: 6vw; margin-right: 6vw; }
  .is-grid, .start-grid, .biz-grid, .kpis, .steps, .stack, .foot-top, .foot-cols {
    grid-template-columns: 1fr;
  }
  .is-grid li, .biz-grid article, .start-grid a { min-height: 0; }
  .biz-grid h3 { font-size: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}