:root{
  --paper:#f4f1eb;--surface:#fff;--line:#e3ded4;--ink:#1c1b19;--muted:#5f5b54;
  --accent:#0e6b63;--accent-soft:#e3f0ee;--ai:#5b4baf;--ai-soft:#eeebf8;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 'IBM Plex Sans',system-ui,sans-serif}
a{color:var(--accent)}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.hero{padding:64px 0 40px;border-bottom:1px solid var(--line);background:#faf8f4}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
h1{font-family:'Fraunces',Georgia,serif;font-weight:500;font-size:clamp(30px,4.6vw,48px);line-height:1.08;letter-spacing:-.01em;margin:10px 0 16px;max-width:820px}
.lede{font-size:18px;max-width:760px;color:#2a2825;margin:0 0 22px}
.cta{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;height:44px;padding:0 18px;border-radius:10px;background:var(--accent);color:#fff;font-weight:600;text-decoration:none}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid #d5cfc4}
h2{font-family:'Fraunces',Georgia,serif;font-weight:500;font-size:28px;margin:48px 0 12px}
h3{font-size:17px;margin:0 0 6px}
.muted{color:var(--muted)}
.principles ol{padding-left:22px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr));gap:8px 28px;margin:0}
.principles li{padding:6px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(340px,100%),1fr));gap:22px;margin-top:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.preview{display:block;background:#e9e5dd;border-bottom:1px solid var(--line)}
.viewport{overflow:hidden;position:relative}
.viewport iframe{border:0;transform-origin:top left;pointer-events:none;position:absolute;left:0;top:0}
.meta{padding:14px 16px 18px;display:flex;flex-direction:column;gap:4px}
.group{font-size:11.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
.meta h3 a{color:var(--ink);text-decoration:none}
.meta h3 a:hover{text-decoration:underline}
.meta p{margin:0;font-size:14px;color:#3a3833}
.system .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr));gap:32px}
.swatches{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.swatches li{display:flex;align-items:center;gap:10px;font-size:14px}
.swatches span{width:22px;height:22px;border-radius:6px;border:1px solid rgba(0,0,0,.08);flex-shrink:0}
code{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:13px;background:#ebe6dd;padding:1px 6px;border-radius:5px}
.serif{font-family:'Fraunces',Georgia,serif;font-size:19px}
.foot{padding:40px 20px 60px;font-size:14px;color:var(--muted)}

.hero.slim{padding:18px 0}
.hero.slim a{font-weight:600;text-decoration:none}
.prose{max-width:860px;padding-top:32px;padding-bottom:80px}
.prose h1{font-size:clamp(28px,4vw,40px)}
.prose h2{font-size:26px;margin-top:44px}
.prose h3{font-size:18px;margin-top:28px}
.prose p,.prose li{font-size:16px}
.prose a{word-break:break-word}
.prose table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.prose th{background:#faf8f4}
.prose hr{border:0;border-top:1px solid var(--line);margin:36px 0}

.proto-callout{margin-top:40px;padding:22px 24px;border-radius:16px;background:#fff;border:1px solid var(--line);position:relative;overflow:hidden}
.proto-callout::after{content:"";position:absolute;right:22px;top:22px;width:10px;height:10px;border-radius:2px;background:var(--accent);box-shadow:14px 0 0 #cfe3df,0 14px 0 #cfe3df,14px 14px 0 var(--accent-soft)}
.proto-callout h2{margin:6px 0 8px}
.proto-callout p{margin:0 0 16px;max-width:760px;color:#2a2825}
.switch-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:6px 0 4px}
.small{font-size:13px}