:root{color-scheme:light;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}html{scroll-padding-top:env(safe-area-inset-top,0px)}body{margin:0;padding:0;font:14px -apple-system,BlinkMacSystemFont,sans-serif;background:#fff;color:#000}img{max-width:100%}[hidden]:not([hidden=until-found i]){display:none!important}

/* Layout: editorial single column, wide hero statement, news list, Geometria tier band, approach sequence, footer. Post pages share the shell via #hash. */
:root {
  --bg: #F2F3F5;
  --surface: #E6E8EC;
  --ink: #151720;
  --muted: #5A606C;
  --line: #D2D5DB;
  --luna: #AEB5BE;
  --luna-ink: #6E7682;
  --terra: #2E8760;
  --sol: #B88A12;
  --sol-mark: #F5C84B;
  --uni: #151720;
  --uni-mark: #151720;
  --f-display: "Noto Serif KR", "Nanum Myeongjo", Georgia, serif;
  --f-body: "IBM Plex Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --wrap: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151720; --surface: #1D2030; --ink: #E7E9EE; --muted: #9CA2AE; --line: #2C3044;
    --luna: #AEB5BE; --luna-ink: #AEB5BE; --terra: #4DB283; --sol: #F5C84B; --sol-mark: #F5C84B;
    --uni: #E7E9EE; --uni-mark: #C9CCE0; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #151720; --surface: #1D2030; --ink: #E7E9EE; --muted: #9CA2AE; --line: #2C3044;
  --luna: #AEB5BE; --luna-ink: #AEB5BE; --terra: #4DB283; --sol: #F5C84B; --sol-mark: #F5C84B;
  --uni: #E7E9EE; --uni-mark: #C9CCE0; color-scheme: dark;
}
* { box-sizing: border-box; }
body { background: var(--bg); color: var(--ink); font-family: var(--f-body); font-size: 16px; line-height: 1.7; word-break: keep-all; overflow-wrap: break-word; }
a { color: inherit; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
h1, h2, h3 { font-family: var(--f-display); font-weight: 700; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
.label { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
:focus-visible { outline: 2px solid var(--terra); outline-offset: 3px; border-radius: 2px; }

/* header */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg); }
header.site { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: var(--bg); border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--f-display); font-weight: 700; font-size: 20px; letter-spacing: 0.01em; }
.brand svg { width: 22px; height: 22px; }
nav.main { display: flex; gap: 22px; flex-wrap: wrap; font-size: 14px; }
nav.main a { text-decoration: none; color: var(--muted); }
nav.main a:hover { color: var(--ink); }

/* hero */
.hero { padding-block: clamp(56px, 10vw, 120px) clamp(40px, 7vw, 80px); }
.hero h1 { font-size: clamp(36px, 6.4vw, 76px); line-height: 1.18; max-width: 15em; }
.hero h1 em { font-style: normal; color: var(--terra); }
.hero p { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 36em; margin: 28px 0 0; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 36px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 999px; font-size: 15px; font-weight: 500; text-decoration: none; border: 1px solid var(--ink); }
.btn.solid { background: var(--ink); color: var(--bg); }
.btn:hover { opacity: 0.85; }

section.block { padding-block: clamp(48px, 7vw, 88px); border-top: 1px solid var(--line); }
.block-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }
.block-head h2 { font-size: clamp(26px, 3.2vw, 38px); }

/* news */
.news { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; }
.news .side { display: grid; gap: 24px; }
.post-card { display: flex; flex-direction: column; gap: 14px; text-decoration: none; padding: 28px; background: var(--surface); border-radius: 6px; min-width: 0; transition: transform .2s ease; }
.post-card:hover { transform: translateY(-2px); }
.post-card .art { aspect-ratio: 16 / 9; max-width: 100%; border-radius: 4px; display: grid; place-items: center; background: var(--bg); }
.post-card .art svg { width: 38%; height: auto; }
.post-card h3 { font-size: 24px; line-height: 1.35; }
.side .post-card h3 { font-size: 20px; }
.post-card p { margin: 0; color: var(--muted); font-size: 15px; }
.meta { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.chip { font-family: var(--f-mono); font-size: 11.5px; letter-spacing: 0.04em; padding: 3px 9px; border-radius: 999px; border: 1px solid currentColor; }
.chip.dev { color: var(--sol); }
.chip.ok { color: var(--terra); }
.chip:not(.dev):not(.ok) { color: var(--muted); }
.date { font-family: var(--f-mono); font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; }

/* tiers */
.tiers { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); }
.tier { padding: 28px 22px 32px 0; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.tier + .tier { padding-left: 22px; border-left: 1px solid var(--line); }
.tier svg { width: 56px; height: 56px; margin-bottom: 10px; }
.tier h3 { font-size: 28px; }
.tier .sym { font-family: var(--f-mono); font-size: 13px; color: var(--muted); }
.tier .scale { font-family: var(--f-mono); font-size: 14px; font-variant-numeric: tabular-nums; }
.tier p { margin: 0; color: var(--muted); font-size: 14.5px; }
.tier .status { margin-top: auto; padding-top: 10px; font-size: 13px; font-weight: 600; }
.tier.active .status { color: var(--sol); }
.tier .status.plan { color: var(--muted); font-weight: 500; }
.note { margin-top: 24px; font-size: 13.5px; color: var(--muted); max-width: 52em; }

/* approach */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; counter-reset: step; }
.step { min-width: 0; }
.step .n { font-family: var(--f-mono); font-size: 13px; color: var(--terra); }
.step h3 { font-size: 22px; margin: 10px 0 10px; }
.step p { margin: 0; color: var(--muted); }

.about { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: start; }
.about h2 { font-size: clamp(26px, 3.2vw, 38px); }
.about p { margin: 0 0 16px; max-width: 38em; }

footer { border-top: 1px solid var(--line); padding-block: 40px 56px; font-size: 13.5px; color: var(--muted); }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* article */
article.post { padding-block: clamp(40px, 7vw, 80px) 72px; }
article.post .inner { max-width: 44rem; margin: 0 auto; }
.back { display: inline-flex; gap: 6px; font-size: 14px; color: var(--muted); text-decoration: none; margin-bottom: 40px; }
.back:hover { color: var(--ink); }
article.post h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.25; margin: 18px 0 22px; }
article.post .lede { font-size: 19px; color: var(--muted); margin: 0 0 40px; }
article.post .figure { aspect-ratio: 21 / 9; max-width: 100%; background: var(--surface); border-radius: 6px; display: grid; place-items: center; margin-bottom: 44px; }
article.post .figure svg { width: 22%; height: auto; }
article.post h2 { font-size: 24px; margin: 44px 0 14px; }
article.post p { margin: 0 0 20px; font-size: 17px; line-height: 1.85; }
article.post ul { margin: 0 0 20px; padding-left: 1.2em; font-size: 17px; line-height: 1.85; }
article.post table { border-collapse: collapse; width: 100%; font-size: 15px; margin-bottom: 24px; }
article.post th, article.post td { text-align: left; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; }
article.post th { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.tbl { overflow-x: auto; }
.sign { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }

@media (max-width: 860px) {
  .news, .about { grid-template-columns: 1fr; }
  .tiers { grid-template-columns: 1fr 1fr; }
  .tier:nth-child(3) { padding-left: 0; border-left: 0; }
  .tier:nth-child(n+3) { border-top: 1px solid var(--line); }
  .steps { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 520px) {
  nav.main { display: none; }
  .tiers { grid-template-columns: 1fr; }
  .tier, .tier + .tier { padding-left: 0; border-left: 0; }
  .tier + .tier { border-top: 1px solid var(--line); }
  .post-card { padding: 22px; }
}
@media (prefers-reduced-motion: reduce) { .post-card { transition: none; } }

pre{overflow:auto;padding:20px;background:var(--surface);border-radius:8px}code{font-family:var(--f-mono)}.news-empty{padding:24px}.admin-link{font-size:13px}.symbol-library{position:absolute}.meta{flex-wrap:wrap}