:root {
  --font-title: 'Gowun Batang', 'Nanum Myeongjo', serif;
  --font-body: 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  --ink-strong: #193247;
  --ink-soft: #53687a;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: rgba(247, 243, 235, 0.9);
  --line-soft: rgba(36, 58, 78, 0.16);
  --line-strong: rgba(36, 58, 78, 0.24);
  --accent: #1e7f73;
  --accent-soft: rgba(30, 127, 115, 0.12);
  --gold: #b8732c;
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-body);
  line-height: 1.68;
  color: var(--ink-strong);
  background:
    radial-gradient(circle at 10% 10%, rgba(255, 172, 102, 0.4), transparent 30%),
    radial-gradient(circle at 92% 12%, rgba(62, 182, 166, 0.28), transparent 28%),
    radial-gradient(circle at 82% 76%, rgba(255, 212, 164, 0.2), transparent 22%),
    linear-gradient(165deg, #fbf3e7 0%, #eef4f1 48%, #fbf8f2 100%);
}

a {
  color: #1a627d;
  text-underline-offset: 2px;
  overflow-wrap: anywhere;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.92em;
}

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(1rem, 2vw, 1.6rem);
  display: grid;
  gap: 1rem;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.85fr);
  gap: 1rem;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 1.4rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.75), rgba(252, 249, 243, 0.48)),
    var(--surface-strong);
  box-shadow: 0 20px 40px rgba(19, 30, 43, 0.12);
  padding: clamp(1.1rem, 2.2vw, 1.6rem);
}

.hero::after {
  content: '';
  position: absolute;
  inset: auto -12% -28% auto;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 190, 121, 0.26), rgba(255, 190, 121, 0));
  pointer-events: none;
}

.hero-copy,
.hero-facts {
  position: relative;
  z-index: 1;
}

.hero-copy {
  display: grid;
  gap: 0.7rem;
  align-content: start;
}

.hero-facts {
  display: grid;
  gap: 0.7rem;
  align-content: start;
}

.brand,
.eyebrow,
.section-kicker,
.fact-label {
  margin: 0;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
}

.brand {
  text-transform: uppercase;
  color: #597184;
}

.eyebrow,
.section-kicker,
.fact-label {
  color: var(--gold);
}

h1 {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.1;
}

.summary {
  margin: 0;
  max-width: 58ch;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.meta {
  margin: 0;
  font-size: 0.88rem;
  color: #617b90;
}

.hero-actions,
.jump-links,
.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.chip-link,
.jump-links a,
.links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.55rem 0.88rem;
  border: 1px solid rgba(33, 57, 78, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #214f69;
  font-weight: 700;
  text-decoration: none;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease;
}

.chip-link:hover,
.jump-links a:hover,
.links a:hover,
.cta-card:hover,
.home-link:hover {
  transform: translateY(-1px);
  border-color: rgba(30, 127, 115, 0.34);
  background: rgba(30, 127, 115, 0.1);
  box-shadow: 0 14px 24px rgba(25, 49, 69, 0.09);
}

.fact {
  border: 1px solid rgba(35, 57, 77, 0.14);
  border-radius: 1.1rem;
  background: rgba(255, 255, 255, 0.68);
  padding: 0.95rem 1rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.46);
}

.fact strong {
  display: block;
  margin-top: 0.25rem;
  font-size: 1.02rem;
  line-height: 1.35;
}

.fact p:last-child {
  margin-top: 0.32rem;
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.jump-links {
  padding: 0.1rem 0;
}

.card {
  border: 1px solid var(--line-soft);
  border-radius: 1.2rem;
  background: var(--surface);
  box-shadow: 0 16px 28px rgba(20, 34, 49, 0.08);
  padding: clamp(1rem, 2vw, 1.35rem);
}

.card.callout {
  background:
    linear-gradient(135deg, rgba(255, 244, 223, 0.9), rgba(242, 250, 248, 0.82)),
    var(--surface);
}

.card.warning {
  background:
    linear-gradient(135deg, rgba(255, 238, 226, 0.92), rgba(255, 249, 243, 0.86)),
    var(--surface);
}

h2 {
  margin: 0.18rem 0 0.65rem;
  font-size: 1.14rem;
  line-height: 1.35;
  color: #204058;
}

p,
li {
  margin: 0;
  color: #324a5f;
}

ul,
ol {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.42rem;
}

.cta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.cta-card {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
  border: 1px solid rgba(34, 57, 78, 0.16);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.72);
  padding: 0.95rem 1rem;
  color: inherit;
  text-decoration: none;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease;
}

.cta-card strong {
  font-size: 1.02rem;
  color: #18384d;
}

.cta-card p {
  color: var(--ink-soft);
}

.inline-note {
  margin-top: 0.75rem;
  color: var(--ink-soft);
}

.mono-block {
  margin-top: 0.75rem;
  border: 1px solid rgba(36, 59, 78, 0.18);
  border-radius: 0.95rem;
  background: rgba(248, 251, 252, 0.9);
  padding: 0.82rem 0.9rem;
  overflow-x: auto;
  color: #23455c;
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.84rem;
  line-height: 1.6;
}

.home-link {
  width: fit-content;
  text-decoration: none;
  border: 1px solid rgba(36, 59, 78, 0.24);
  border-radius: 999px;
  padding: 0.72rem 1rem;
  background: rgba(255, 255, 255, 0.76);
  color: #1b5169;
  font-weight: 800;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .cta-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page {
    padding: 0.9rem;
  }

  .hero,
  .card {
    border-radius: 1rem;
  }

  .chip-link,
  .jump-links a,
  .links a,
  .home-link {
    width: 100%;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink-strong: #e5eff9;
    --ink-soft: #b9cadc;
    --surface: rgba(13, 24, 37, 0.76);
    --surface-strong: rgba(15, 28, 42, 0.88);
    --line-soft: rgba(141, 164, 189, 0.22);
    --line-strong: rgba(141, 164, 189, 0.3);
    --accent-soft: rgba(95, 212, 198, 0.14);
    color-scheme: dark;
  }

  body {
    background:
      radial-gradient(circle at 10% 10%, rgba(232, 138, 68, 0.3), transparent 30%),
      radial-gradient(circle at 92% 12%, rgba(44, 151, 139, 0.22), transparent 28%),
      radial-gradient(circle at 82% 76%, rgba(182, 124, 58, 0.16), transparent 22%),
      linear-gradient(165deg, #0d1723 0%, #102030 48%, #0b1622 100%);
  }

  a {
    color: #97d9fb;
  }

  .hero {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.34);
  }

  .chip-link,
  .jump-links a,
  .links a,
  .fact,
  .cta-card,
  .home-link {
    border-color: rgba(135, 159, 184, 0.24);
    background: rgba(15, 27, 40, 0.7);
    color: #d2e5f7;
  }

  .chip-link:hover,
  .jump-links a:hover,
  .links a:hover,
  .cta-card:hover,
  .home-link:hover {
    border-color: rgba(95, 212, 198, 0.44);
    background: rgba(24, 59, 62, 0.45);
    box-shadow: 0 14px 24px rgba(0, 0, 0, 0.24);
  }

  h2,
  .cta-card strong {
    color: #e3eef9;
  }

  p,
  li,
  .fact p:last-child,
  .cta-card p,
  .inline-note {
    color: #c7d9ea;
  }

  .meta {
    color: #9db3c9;
  }

  .mono-block {
    border-color: rgba(135, 159, 184, 0.24);
    background: rgba(15, 27, 40, 0.78);
    color: #d2e2f2;
  }

  .card.callout {
    background:
      linear-gradient(135deg, rgba(88, 63, 23, 0.34), rgba(18, 49, 50, 0.4)),
      var(--surface);
  }

  .card.warning {
    background:
      linear-gradient(135deg, rgba(92, 38, 24, 0.42), rgba(38, 31, 28, 0.36)),
      var(--surface);
  }
}