:root {
  color-scheme: dark;
  --ink: #e8eef5;
  --muted: #a8b7c7;
  --line: #263648;
  --panel: #101b29;
  --panel-soft: #152437;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --shadow: 0 18px 60px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #08111d; color: var(--ink); font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: #bae6fd; }
code { color: #d5f3ff; background: #0b2133; border: 1px solid #1b3d54; border-radius: .35rem; padding: .08rem .35rem; }
.hero { background: radial-gradient(circle at 80% 10%, rgba(14, 116, 144, .23), transparent 42%), linear-gradient(145deg, #08111d 0%, #0c1d31 100%); border-bottom: 1px solid var(--line); }
.nav, .hero-grid, .section, .footer { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 0; }
.brand { color: var(--ink); font-size: 1.2rem; font-weight: 750; text-decoration: none; letter-spacing: -.02em; }
.nav-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: .92rem; }
.hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 72px; padding: 88px 0 104px; align-items: center; }
.eyebrow, .card-kicker { color: var(--accent); font-size: .76rem; font-weight: 750; letter-spacing: .14em; margin: 0 0 15px; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -.035em; margin: 0 0 18px; }
h1 { font-size: clamp(2.55rem, 6vw, 5.15rem); max-width: 790px; }
h2 { font-size: clamp(1.75rem, 3vw, 2.6rem); }
h3 { font-size: 1.35rem; }
.lede { color: #d6e3ef; font-size: 1.16rem; max-width: 690px; margin: 0 0 14px; }
.lede-ko { color: var(--muted); max-width: 690px; margin: 0; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 13px; margin-top: 30px; }
.quick-scan { background: rgba(16, 27, 41, .76); border: 1px solid #31536c; border-radius: .9rem; margin-top: 30px; max-width: 840px; padding: 18px; }
.quick-scan label { display: block; color: var(--muted); font-size: .86rem; font-weight: 700; margin-bottom: 8px; }
.quick-scan-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 10px; }
.quick-scan input, .quick-scan select { background: #071321; border: 1px solid #44617b; border-radius: .55rem; color: var(--ink); font: inherit; min-height: 48px; padding: .68rem .8rem; }
.quick-scan input:focus, .quick-scan select:focus, .quick-scan button:focus { outline: 3px solid var(--accent); outline-offset: 2px; }
.quick-scan-status { color: var(--muted); font-size: .82rem; margin: 10px 0 0; }
.quick-scan-status[data-state="failure"] { color: #fda4af; }
.quick-scan-status[data-state="accepted"] { color: #86efac; }
.button { border: 1px solid transparent; border-radius: .65rem; display: inline-block; font-weight: 720; padding: .78rem 1.05rem; text-decoration: none; }
.button.primary { background: var(--accent-strong); color: #062032; }
.button.primary:hover { background: #7dd3fc; color: #041a2a; }
.button.secondary { border-color: #44617b; color: var(--ink); background: rgba(13, 31, 50, .5); }
.text-link { padding: .75rem .25rem; }
.trust-card, .path-card, .result-card { background: rgba(16, 27, 41, .86); border: 1px solid var(--line); border-radius: 1rem; box-shadow: var(--shadow); }
.trust-card { padding: 30px; }
.trust-card h2 { font-size: 1.55rem; }
.trust-card ul { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.trust-card li + li { margin-top: 9px; }
.section { padding: 94px 0; }
.section + .section { border-top: 1px solid var(--line); }
.path-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.path-card { padding: 28px; }
.path-card p:not(.card-kicker) { color: var(--muted); min-height: 78px; }
.arrow-link { font-weight: 700; }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 30px; }
.signal { background: var(--panel-soft); border: 1px solid var(--line); border-radius: .75rem; padding: 19px; }
.signal strong, .signal span { display: block; }
.signal strong { font-size: .8rem; color: var(--accent); letter-spacing: .07em; }
.signal span { color: var(--muted); font-size: .9rem; margin-top: 8px; }
.note { color: var(--muted); font-size: .92rem; margin: 23px 0 0; max-width: 840px; }
.example { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 44px; }
.example p:not(.eyebrow) { color: var(--muted); }
.result-card { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; overflow: hidden; }
.result-card > div { background: var(--panel-soft); min-height: 130px; padding: 22px; }
.result-card span, .result-card small { color: var(--muted); display: block; font-size: .75rem; letter-spacing: .07em; }
.result-card b { display: block; font-size: 2.15rem; line-height: 1; margin: 12px 0 6px; }
.compact { max-width: 760px; }
pre { background: #06101b; border: 1px solid var(--line); border-radius: .7rem; overflow-x: auto; padding: 18px; margin: 25px 0; }
pre code { background: none; border: 0; padding: 0; color: #d6e3ef; }
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px 25px; }
.link-grid a { background: var(--panel); border: 1px solid var(--line); border-radius: .6rem; padding: 13px 15px; text-decoration: none; }
.footer { border-top: 1px solid var(--line); color: var(--muted); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 15px; padding: 28px 0 42px; font-size: .9rem; }
.footer p { margin: 0; }
@media (max-width: 780px) {
  .nav, .hero-grid, .section, .footer { width: min(100% - 28px, 640px); }
  .nav { align-items: flex-start; flex-direction: column; padding: 20px 0; }
  .hero-grid, .example { grid-template-columns: 1fr; gap: 36px; padding: 64px 0 74px; }
  .section { padding: 68px 0; }
  .path-grid, .signal-grid { grid-template-columns: 1fr; }
  .quick-scan-row { grid-template-columns: 1fr; }
  .path-card p:not(.card-kicker) { min-height: 0; }
  .link-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 440px) {
  .nav-links { gap: 10px 14px; }
  h1 { font-size: 2.65rem; }
  .actions, .button { width: 100%; }
  .text-link { text-align: center; }
  .link-grid { grid-template-columns: 1fr; }
}