:root {
  --navy-950: #040a12;
  --navy-900: #0b1829;
  --navy-800: #122640;
  --text-primary: #e4eaef;
  --text-secondary: #a3b4c4;
  --text-tertiary: #7d92a8;
  --text-muted: #5a7088;
  --amber-500: #d9a54e;
  --amber-400: #e8bc6a;
  --blue-300: #7fbfdb;
  --border-soft: rgba(228, 234, 239, 0.08);
  --border-medium: rgba(228, 234, 239, 0.16);
  --surface-soft: rgba(228, 234, 239, 0.035);
  --font-display: "Pretendard Variable", Pretendard, system-ui, -apple-system,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  background:
    radial-gradient(circle at 50% -20%, rgba(74, 158, 197, 0.11), transparent 42rem),
    var(--navy-900);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.72;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: break-word;
}

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

.no-break {
  white-space: nowrap;
}

.svg-definitions {
  position: absolute;
}

a:focus-visible {
  border-radius: 4px;
  outline: 2px solid var(--amber-400);
  outline-offset: 4px;
}

::selection {
  background: var(--amber-500);
  color: var(--navy-900);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 20;
  padding: 8px 12px;
  border-radius: 6px;
  background: var(--amber-500);
  color: var(--navy-950);
  font-weight: 700;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding-inline: 32px;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(11, 24, 41, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.nav__inner {
  display: flex;
  min-height: 56px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
}

.brand__mark {
  width: 18px;
  height: 14px;
}

.brand__wordmark {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.2em;
}

.nav__context {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.document {
  padding-block: 80px 112px;
}

.document__header {
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-medium);
}

.document__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  color: var(--amber-500);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.document__eyebrow::before {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber-500);
  box-shadow: 0 0 10px var(--amber-500);
  content: "";
}

.document h1 {
  max-width: 680px;
  margin: 0 0 16px;
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 560;
  letter-spacing: -0.035em;
  line-height: 1.14;
  text-wrap: balance;
}

.document__lead {
  max-width: 680px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 16px;
}

.document__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 28px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
}

.summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-block: 48px 16px;
  padding: 0;
  border: 1px solid var(--border-medium);
  border-radius: 8px;
  background: linear-gradient(135deg, var(--surface-soft), transparent);
  list-style: none;
}

.summary__item {
  min-width: 0;
  padding: 20px;
}

.summary__item + .summary__item {
  border-left: 1px solid var(--border-soft);
}

.summary__label {
  display: block;
  margin-bottom: 8px;
  color: var(--amber-500);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.summary__value {
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.55;
}

.document__section {
  padding-block: 40px;
  border-bottom: 1px solid var(--border-soft);
}

.document__section h2 {
  margin: 0 0 16px;
  color: var(--text-primary);
  font-size: 21px;
  font-weight: 620;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.document__section p,
.document__section ul {
  max-width: 720px;
  margin-block: 0 14px;
  color: var(--text-secondary);
}

.document__section p:last-child,
.document__section ul:last-child {
  margin-bottom: 0;
}

.document__section ul {
  padding-left: 20px;
}

.document__section li + li {
  margin-top: 8px;
}

.text-link {
  color: var(--blue-300);
  text-decoration: underline;
  text-decoration-color: rgba(127, 191, 219, 0.45);
  text-underline-offset: 3px;
  transition: color 150ms ease, text-decoration-color 150ms ease;
}

.text-link:hover {
  color: var(--amber-400);
  text-decoration-color: var(--amber-400);
}

.notice {
  margin-top: 48px;
  padding: 24px;
  border-left: 2px solid var(--amber-500);
  background: var(--surface-soft);
  color: var(--text-secondary);
}

.notice strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.footer {
  padding-block: 36px;
  border-top: 1px solid var(--border-soft);
  color: var(--text-tertiary);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
}

.footer a[aria-current="page"] {
  color: var(--text-secondary);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--amber-500);
  text-underline-offset: 4px;
}

.footer a:hover {
  color: var(--amber-500);
}

@media (max-width: 680px) {
  .container {
    padding-inline: 20px;
  }

  .document {
    padding-block: 56px 80px;
  }

  .document__header {
    padding-bottom: 36px;
  }

  .summary {
    grid-template-columns: 1fr;
    margin-top: 36px;
  }

  .summary__item + .summary__item {
    border-top: 1px solid var(--border-soft);
    border-left: 0;
  }

  .document__section {
    padding-block: 32px;
  }
}

@media (prefers-contrast: more) {
  :root {
    --text-secondary: #c5d0da;
    --text-tertiary: #a9bac9;
    --border-soft: rgba(228, 234, 239, 0.22);
    --border-medium: rgba(228, 234, 239, 0.38);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}