:root {
  --background: #f3f4f6;
  --surface: #ffffff;
  --primary: #172033;
  --accent: #f97316;
  --secondary: #2563eb;
  --text: #172033;
  --muted: #64748b;
  --border: #e5e7eb;
  --soft-blue: #eff6ff;
  --soft-orange: #fff7ed;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", Arial, sans-serif;
  line-height: 1.7;
}

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

.site-header,
footer {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--primary);
  font-size: 19px;
  font-weight: 800;
}

.brand img {
  border-radius: 8px;
}

nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--secondary);
  border-bottom-color: var(--secondary);
}

.hero {
  min-height: 470px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: center;
  gap: 64px;
  padding: 64px max(20px, calc((100vw - var(--max-width)) / 2));
  color: #ffffff;
  background: var(--primary);
}

.hero-inner {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--secondary);
  font-size: 13px;
  font-weight: 800;
}

.hero .eyebrow {
  color: #93c5fd;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 6vw, 60px);
  line-height: 1.18;
}

.hero-copy {
  max-width: 640px;
  margin: 22px 0 0;
  color: #cbd5e1;
  font-size: 18px;
}

.hero-logo {
  width: 220px;
  height: 220px;
  border-radius: 32px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 800;
}

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

.button.secondary {
  color: #ffffff;
  border-color: #64748b;
  background: transparent;
}

.section,
.document-page {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.section {
  padding: 76px 0 88px;
}

.section-heading {
  max-width: 700px;
  margin-bottom: 28px;
}

.section h2,
.document-header h1 {
  margin: 0;
  color: var(--primary);
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.3;
}

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

.feature,
.support-action {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.feature {
  min-height: 220px;
  padding: 28px;
}

.feature strong {
  color: var(--accent);
  font-size: 14px;
}

.feature h3 {
  margin: 32px 0 8px;
  font-size: 21px;
}

.feature p,
.document-header > p:not(.eyebrow),
.document p {
  color: var(--muted);
}

.document-page {
  padding: 56px 0 88px;
}

.document-header {
  max-width: 780px;
  margin-bottom: 28px;
}

.document-header > p:not(.eyebrow) {
  margin: 14px 0 0;
  font-size: 18px;
}

.document-header .updated {
  font-size: 14px;
}

.document {
  padding: 12px 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.document section {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.document section:last-child {
  border-bottom: 0;
}

.document h2 {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 22px;
}

.document p {
  margin: 8px 0;
}

.document ul {
  margin: 14px 0 0;
  padding: 18px 20px 18px 40px;
  border-radius: 8px;
  background: var(--soft-blue);
}

.document li + li {
  margin-top: 6px;
}

.notice {
  margin-top: 14px;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 4px;
  color: #9a3412;
  background: var(--soft-orange);
}

.text-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--secondary);
  font-weight: 800;
}

.support-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.support-action {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 22px 24px;
}

.support-action span {
  color: var(--muted);
  font-size: 14px;
}

.support-action strong {
  color: var(--secondary);
  font-size: 18px;
}

.faq h2 {
  font-size: 20px;
}

footer {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

footer div {
  display: flex;
  gap: 20px;
}

@media (max-width: 760px) {
  .site-header {
    min-height: 68px;
  }

  nav {
    gap: 14px;
    font-size: 14px;
  }

  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 54px;
    padding-bottom: 56px;
  }

  .hero-logo {
    width: 112px;
    height: 112px;
    grid-row: 1;
    border-radius: 22px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .feature-grid,
  .support-actions {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 56px 0 64px;
  }

  .document-page {
    padding: 40px 0 64px;
  }

  .document {
    padding: 4px 20px;
  }
}

@media (max-width: 520px) {
  .site-header,
  footer,
  .section,
  .document-page {
    width: min(100% - 28px, var(--max-width));
  }

  .brand span {
    font-size: 17px;
  }

  nav a:first-child {
    display: none;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 20px 0;
  }
}