:root {
  --bg: #fafafb; --bg-alt: #f0f1f4; --surface: #ffffff; --line: #e1e2e7;
  --text: #1a1a1c; --text-2: #5c5c62; --text-3: #77777d;
  --blue: #2466f2; --blue-text: #1c58d8; --on-blue: #ffffff;
  --shadow: 0 18px 50px rgba(20, 24, 40, .16);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f2126; --bg-alt: #18191d; --surface: #292c33; --line: #34373f;
    --text: #ededed; --text-2: #a1a1a1; --text-3: #8c8c8c;
    --blue: #3d7aff; --blue-text: #7ba4ff; --on-blue: #ffffff;
    --shadow: 0 18px 60px rgba(0, 0, 0, .55);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", sans-serif; word-break: keep-all; -webkit-text-size-adjust: 100%; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue-text); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: 4px; }
main:focus { outline: none; }
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 20; }
.skip-link:focus { left: 16px; }

.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 58px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); text-decoration: none; }
.brand img { border-radius: 6px; }
.site-header nav { display: flex; gap: 20px; font-size: 14px; }
.site-header nav a { color: var(--text-2); text-decoration: none; }
.site-header nav a:hover, .site-header nav a[aria-current] { color: var(--text); }
.site-header nav .nav-strong { color: var(--text); font-weight: 600; }

.hero { padding: 72px 0 0; overflow: hidden; }
.hero-text { text-align: center; }
.eyebrow { margin: 0 0 12px; color: var(--text-3); font-size: 14px; }
h1 { margin: 0; font-size: clamp(32px, 5.6vw, 56px); line-height: 1.22; letter-spacing: -.02em; font-weight: 800; }
.lead { max-width: 600px; margin: 20px auto 0; color: var(--text-2); font-size: clamp(16px, 2vw, 19px); }
.actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 28px; }
.button { display: inline-block; padding: 11px 20px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px; }
.button:hover { border-color: var(--text-3); }
.button.primary { background: var(--blue); border-color: var(--blue); color: var(--on-blue); }
.button.primary:hover { filter: brightness(1.08); }
.hero-shot { margin-top: 48px; margin-bottom: -28px; }
.hero-shot img, .shot { border-radius: 12px; box-shadow: var(--shadow); border: 1px solid var(--line); }

.features { padding-top: 96px; }
.feature { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; align-items: center; padding: 44px 0; }
.feature > * { min-width: 0; }
.feature.flip .feature-text { order: 2; }
.feature h2 { margin: 0 0 12px; font-size: clamp(24px, 3vw, 32px); line-height: 1.3; letter-spacing: -.01em; }
.feature p { margin: 0; color: var(--text-2); }
.feature ul { margin: 16px 0 0; padding: 0; list-style: none; color: var(--text-2); font-size: 15px; }
.feature li { padding: 6px 0 6px 18px; position: relative; }
.feature li::before { content: ""; position: absolute; left: 0; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.shot.sheet { width: 100%; max-width: 480px; justify-self: center; }
.shot.small { width: 100%; max-width: 360px; justify-self: center; }

.band { margin-top: 56px; background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.promises { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; padding-top: 52px; padding-bottom: 52px; }
.promises h3 { margin: 0 0 8px; font-size: 18px; }
.promises p { margin: 0; color: var(--text-2); font-size: 15px; }

.section { padding-top: 72px; }
.section h2 { margin: 0 0 16px; font-size: clamp(24px, 3vw, 32px); letter-spacing: -.01em; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--line); }
tr:last-child th, tr:last-child td { border-bottom: 0; }
thead th { font-size: 14px; color: var(--text); }
tbody th { font-weight: 500; }
td { color: var(--text-2); white-space: nowrap; }
.muted { color: var(--text-3); font-size: 14px; margin-top: 12px; }
pre { margin: 12px 0; padding: 16px; overflow-x: auto; background: var(--bg-alt); border: 1px solid var(--line); border-radius: 10px; font-size: 14px; line-height: 1.6; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92em; }
.faq { padding-bottom: 88px; }
details { border-bottom: 1px solid var(--line); }
summary { padding: 15px 0; cursor: pointer; font-weight: 600; }
details p { margin: 0 0 16px; color: var(--text-2); }

.document-main { max-width: 780px; padding-top: 44px; padding-bottom: 88px; }
.document-content h1 { font-size: clamp(28px, 4vw, 38px); margin-bottom: 20px; }
.document-content h2 { margin-top: 44px; font-size: 24px; line-height: 1.35; }
.document-content h3 { margin-top: 28px; font-size: 18px; }
.document-content li { margin: 4px 0; }
.document-content table { display: block; overflow-x: auto; }
.document-content td { white-space: normal; }

.site-footer { border-top: 1px solid var(--line); background: var(--bg-alt); padding: 28px 0; font-size: 14px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 14px 24px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.site-footer nav a { color: var(--text-2); text-decoration: none; }
.site-footer nav a:hover { color: var(--text); }
.footer-note { margin-top: 14px; color: var(--text-3); font-size: 13px; }

@media (max-width: 820px) {
  .hero { padding-top: 48px; }
  .hero-shot { margin-top: 36px; margin-bottom: -16px; }
  .features { padding-top: 56px; }
  .feature { grid-template-columns: minmax(0, 1fr); gap: 24px; padding: 32px 0; }
  .feature.flip .feature-text { order: 0; }
  .promises { grid-template-columns: 1fr; gap: 24px; padding-top: 40px; padding-bottom: 40px; }
  .section { padding-top: 56px; }
  .site-header nav { gap: 14px; }
}
@media (max-width: 520px) {
  th, td { padding: 10px 12px; font-size: 14px; }
  tbody th { min-width: 150px; }
  td { white-space: normal; }
}
@media (max-width: 420px) {
  .container { padding: 0 16px; }
  .site-header nav a:not(.nav-strong):not([href*="guide"]) { display: none; }
}