:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --panel: #151922;
  --panel-2: #1f2633;
  --ink: #f8fafc;
  --muted: #aab4c3;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #f2b84b;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.05), transparent 32rem),
    linear-gradient(180deg, #0b0d12 0%, #121620 52%, #0b0d12 100%);
  color: var(--ink);
  font-family:
    Pretendard,
    "Noto Sans KR",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 13, 18, 0.88);
  backdrop-filter: blur(16px);
}

.brand,
.nav,
.hero-actions,
.contact-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--accent);
  color: #10131a;
  font-weight: 950;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  justify-content: center;
  gap: clamp(12px, 2vw, 28px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.nav a:hover,
.header-call:hover {
  color: var(--accent);
}

.header-call {
  color: var(--accent);
  font-weight: 900;
  white-space: nowrap;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.78fr);
  align-items: center;
  gap: clamp(28px, 6vw, 86px);
  padding: clamp(68px, 9vw, 120px) 5vw;
}

.hero-copy {
  order: 1;
}

.hero-media {
  order: 2;
  min-height: min(54vw, 560px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 34%, transparent), transparent 54%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 18px),
    #171c25;
  box-shadow: var(--shadow);
  display: grid;
  place-items: end start;
  padding: clamp(22px, 4vw, 44px);
}

.glass-tile {
  min-width: min(100%, 310px);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(8, 10, 14, 0.64);
  backdrop-filter: blur(12px);
}

.glass-tile span,
.glass-tile strong {
  display: block;
}

.glass-tile span {
  color: var(--muted);
  font-weight: 800;
}

.glass-tile strong {
  color: var(--accent);
  font-size: clamp(58px, 10vw, 118px);
  line-height: 0.92;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 950;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2 {
  margin: 0;
  line-height: 1.08;
}

h1 {
  max-width: 860px;
  font-size: clamp(42px, 7vw, 86px);
}

.hero-copy > p:not(.eyebrow) {
  max-width: 690px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions,
.contact-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 950;
  white-space: nowrap;
}

.button.primary {
  background: var(--accent);
  color: #10131a;
}

.button.secondary,
.button.dark {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--line);
}

.button.dark {
  background: #10131a;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.signal-strip span {
  min-height: 66px;
  display: grid;
  place-items: center;
  padding: 14px;
  color: var(--muted);
  border-right: 1px solid var(--line);
  font-weight: 900;
  text-align: center;
}

.signal-strip span:last-child {
  border-right: 0;
}

.section {
  padding: clamp(58px, 8vw, 106px) 5vw;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.section-heading h2,
.contact h2 {
  font-size: clamp(30px, 5vw, 58px);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article {
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  box-shadow: var(--shadow);
}

.feature-grid span {
  color: var(--accent);
  font-weight: 950;
}

.feature-grid h3 {
  margin: 12px 0 8px;
  font-size: 22px;
}

.feature-grid p,
.contact p {
  margin: 0;
  color: var(--muted);
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword-list span {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
  font-weight: 850;
}

.faq {
  background: rgba(255, 255, 255, 0.025);
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 920px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  box-shadow: var(--shadow);
}

.faq-list summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--ink);
  font-weight: 950;
}

.faq-list p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.contact {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  border-top: 1px solid var(--line);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 5vw;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer strong {
  color: var(--ink);
}

@media (max-width: 920px) {
  .topbar,
  .hero,
  .feature-grid,
  .signal-strip {
    grid-template-columns: 1fr;
  }

  .topbar {
    gap: 12px;
    padding-block: 16px;
  }

  .nav {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .hero-media {
    order: 1;
    min-height: 360px;
  }

  .hero-copy {
    order: 2;
  }

  .signal-strip span {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .signal-strip span:last-child {
    border-bottom: 0;
  }

  .contact,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 540px) {
  .hero-actions,
  .contact-actions,
  .button {
    width: 100%;
  }
}