:root { --ink:#171816; --paper:#f3efe6; --panel:#faf8f2; --line:#d7d1c5; --muted:#716e67; --coral:#ff6b4a; --cyan:#9de3e0; --olive:#c9d4a7; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:var(--paper); color:var(--ink); font-family:"Geist",Arial,sans-serif; }
button,input { font:inherit; } button { cursor:pointer; }
.topbar { height:72px; padding:0 4.5vw; display:flex; align-items:center; justify-content:space-between; border-bottom:1px solid var(--line); position:sticky; top:0; z-index:20; background:color-mix(in srgb,var(--paper) 92%,transparent); backdrop-filter:blur(16px); }
.brand { display:flex; align-items:center; gap:11px; color:inherit; text-decoration:none; font-size:20px; font-weight:720; letter-spacing:-.04em; }
.brand-mark { width:32px; height:32px; border-radius:50%; display:inline-grid; place-items:center; background:var(--ink); color:var(--cyan); font:italic 13px Georgia,serif; letter-spacing:-.04em; }
.nav-actions { display:flex; align-items:center; gap:12px; }
.portal-back { display:inline-flex; align-items:center; gap:7px; padding:9px 12px; border:1px solid var(--line); border-radius:30px; color:inherit; background:var(--panel); text-decoration:none; font-size:11px; font-weight:650; }
.portal-back span { color:var(--coral); font-size:15px; }
.system-badge { border:1px solid var(--line); padding:8px 13px; border-radius:30px; font:600 10px "Geist Mono",monospace; text-transform:uppercase; letter-spacing:.08em; }
.system-badge i { display:inline-block; width:7px; height:7px; border-radius:50%; background:#7ca274; margin-right:7px; box-shadow:0 0 0 3px #dce5ce; }
.text-button,.example-button { border:0; background:transparent; color:var(--ink); padding:9px 10px; font-weight:600; }.text-button:hover,.example-button:hover { color:var(--coral); }
.print-button { border:0; border-radius:7px; background:var(--ink); color:white; padding:10px 17px; font-weight:650; }
.page-shell { width:min(1420px,91vw); margin:0 auto; }
.hero { display:grid; grid-template-columns:1.6fr .7fr; align-items:end; gap:7vw; padding:42px 0 34px; }
.hero h1 { max-width:850px; margin:13px 0 0; font-size:clamp(32px,4.3vw,66px); line-height:.96; letter-spacing:-.065em; }.hero h1 i { color:var(--coral); font-family:Georgia,serif; font-weight:400; }
.kicker,.eyebrow { display:block; color:var(--muted); font:650 9px/1.2 "Geist Mono",monospace; text-transform:uppercase; letter-spacing:.12em; }
.hero-note { border-top:1px solid var(--ink); padding-top:14px; display:grid; grid-template-columns:35px 1fr; gap:16px; }.hero-note>span { font:600 10px "Geist Mono",monospace; }.hero-note p { margin:0; color:var(--muted); font-size:13px; line-height:1.55; }
.workspace { display:grid; grid-template-columns:minmax(0,1.03fr) minmax(430px,.97fr); border:1px solid var(--ink); border-radius:12px; overflow:hidden; box-shadow:0 20px 70px rgba(48,43,34,.08); }
.inputs-panel { padding:28px; background:var(--panel); }
.section-title { display:flex; align-items:center; justify-content:space-between; gap:18px; }.section-title>div,.result-header,.method>div,.vector-heading>div,.vector-heading>div>div { display:flex; align-items:center; gap:13px; }
.section-index { width:28px; height:28px; border:1px solid var(--ink); border-radius:50%; display:inline-grid; place-items:center; flex:0 0 auto; font:600 9px "Geist Mono",monospace; }.section-index.light { border-color:rgba(255,255,255,.4); color:var(--cyan); }
.section-title h2,.result-header h2,.method h2 { margin:0; font-size:17px; letter-spacing:-.025em; }.example-button { border-bottom:1px solid var(--ink); padding:5px 0; font-size:12px; }
.section-intro { margin:15px 0 22px 41px; color:var(--muted); font-size:12px; line-height:1.5; }
.rx-card,.transpose-card,.meridian-control,.vector-rx { border:1px solid var(--line); border-radius:9px; padding:18px; background:#fffdfa; }.transpose-card,.meridian-control { margin-top:12px; }
.rx-heading,.control-topline { display:flex; align-items:center; justify-content:space-between; padding-bottom:13px; border-bottom:1px solid var(--line); }
.rx-badge { min-width:30px; height:22px; padding:0 7px; display:grid; place-items:center; border-radius:20px; background:var(--olive); font:700 9px "Geist Mono",monospace; }.rx-badge.coral { background:#ffd4ca; }.rx-badge.cyan { background:var(--cyan); }
.rx-grid { display:grid; grid-template-columns:1fr 1fr .8fr; gap:9px; margin-top:14px; }.rx-grid label { position:relative; color:var(--muted); font:600 9px "Geist Mono",monospace; text-transform:uppercase; letter-spacing:.07em; }.rx-grid label>span { float:right; }.rx-grid input { width:100%; margin-top:7px; border:1px solid var(--line); border-radius:6px; background:var(--paper); padding:10px; outline:0; font-size:18px; font-weight:650; color:var(--ink); }.rx-grid input:focus,.exact-meridian input:focus { border-color:var(--coral); box-shadow:0 0 0 3px rgba(255,107,74,.12); }
.compact-result { display:flex; align-items:center; justify-content:space-between; gap:12px; margin-top:10px; }.compact-result strong { font-size:20px; letter-spacing:-.04em; }.compact-result button { flex:0 0 auto; border:0; border-bottom:1px solid var(--ink); padding:5px 0; background:transparent; font-size:10px; font-weight:650; }.transpose-card p { margin:9px 0 0; color:var(--muted); font-size:10px; }
.control-topline strong { color:var(--coral); font-size:14px; }.range { appearance:none; width:100%; height:5px; margin:24px 0 8px; border-radius:5px; background:linear-gradient(90deg,var(--coral),#ffd5cb); }.range::-webkit-slider-thumb { appearance:none; width:20px; height:20px; border:5px solid var(--ink); border-radius:50%; background:white; box-shadow:0 0 0 2px white; }.range-labels { display:flex; justify-content:space-between; color:var(--muted); font:500 8px "Geist Mono",monospace; }.exact-meridian { display:flex; align-items:center; justify-content:flex-end; gap:7px; margin-top:13px; color:var(--muted); font-size:9px; }.exact-meridian input { width:67px; border:1px solid var(--line); border-radius:5px; background:var(--paper); padding:7px 8px; font-weight:650; outline:0; }
.result-panel { position:relative; overflow:hidden; padding:28px; background:var(--ink); color:white; }.result-panel::after { content:""; position:absolute; width:330px; height:330px; border:1px solid rgba(157,227,224,.07); border-radius:50%; right:-170px; top:-150px; pointer-events:none; }.result-panel>p { margin:15px 0 0 41px; color:#aaa9a4; font-size:11px; line-height:1.5; }
.optical-cross { min-height:270px; display:grid; place-items:center; }.cross-ring { width:220px; height:220px; position:relative; border:1px solid rgba(255,255,255,.25); border-radius:50%; background:repeating-radial-gradient(circle,transparent 0 24%,rgba(255,255,255,.055) 24.5% 25%); }.cross-ring::before,.cross-ring::after { content:""; position:absolute; background:rgba(255,255,255,.1); }.cross-ring::before { width:100%; height:1px; top:50%; }.cross-ring::after { height:100%; width:1px; left:50%; }.cross-ring>em { position:absolute; width:8px; height:8px; left:calc(50% - 4px); top:calc(50% - 4px); border-radius:50%; background:white; z-index:3; }
.cross-axis { position:absolute; width:184px; height:1px; left:18px; top:calc(50% - .5px); transform-origin:center; background:rgba(157,227,224,.8); z-index:2; }.cross-axis.principal-two { background:rgba(255,255,255,.55); }.cross-axis.explored { height:3px; background:var(--coral); box-shadow:0 0 16px rgba(255,107,74,.35); z-index:1; }.cross-axis b,.cross-axis i { position:absolute; display:block; padding:5px 7px; border-radius:20px; background:var(--cyan); color:var(--ink); font:650 8px "Geist Mono",monospace; white-space:nowrap; transform:translate(-50%,-50%); }.cross-axis b { left:0; top:50%; }.cross-axis i { left:100%; top:50%; background:var(--panel); font-style:normal; }
.meridian-result { padding:17px 0; border-top:1px solid #393a36; border-bottom:1px solid #393a36; }.meridian-result>span { color:#aaa9a4; font-size:10px; }.meridian-result>span b { color:var(--coral); }.meridian-result>strong { display:block; margin:4px 0 3px; font-size:clamp(38px,4vw,56px); letter-spacing:-.07em; }.meridian-result>strong i { color:var(--coral); font:italic 18px Georgia,serif; }.meridian-result small { color:#858680; font-size:9px; }
.metric-grid { display:grid; grid-template-columns:1fr 1fr 1.1fr; margin-top:17px; }.metric-grid>div { padding-right:10px; }.metric-grid>div+div { padding-left:10px; border-left:1px solid #393a36; }.metric-grid span,.metric-grid strong { display:block; }.metric-grid span { min-height:25px; color:#858680; font-size:8px; text-transform:uppercase; letter-spacing:.07em; }.metric-grid strong { margin-top:5px; font-size:11px; }
.copy-main { width:100%; height:41px; display:flex; align-items:center; justify-content:space-between; margin-top:20px; border:0; border-radius:6px; padding:0 14px; background:var(--coral); color:var(--ink); font-weight:700; }.copy-main span { font-size:18px; }
.vector-section { padding:70px 0; }.vector-heading { display:flex; align-items:end; justify-content:space-between; gap:40px; margin-bottom:25px; }.vector-heading h2 { margin:4px 0 0; font-size:clamp(28px,3.2vw,48px); letter-spacing:-.055em; }.vector-heading>p { max-width:460px; margin:0; color:var(--muted); font-size:12px; line-height:1.55; }
.vector-workspace { display:grid; grid-template-columns:1.45fr .55fr; border:1px solid var(--ink); border-radius:12px; overflow:hidden; }.vector-inputs { display:grid; grid-template-columns:1fr 38px 1fr; align-items:center; gap:0; padding:25px; background:var(--panel); }.plus-sign { display:grid; place-items:center; color:var(--coral); font:italic 30px Georgia,serif; }.vector-values { display:grid; grid-template-columns:repeat(3,1fr); margin-top:15px; padding-top:12px; border-top:1px solid var(--line); }.vector-values span { color:var(--muted); font:500 8px "Geist Mono",monospace; }.vector-values b { display:block; margin-top:4px; color:var(--ink); font-size:10px; }
.sum-result { min-width:0; padding:25px; background:var(--olive); }.sum-result>div:first-child { display:flex; align-items:center; justify-content:space-between; }.sum-mark { width:32px; height:32px; display:grid; place-items:center; border-radius:50%; background:var(--ink); color:var(--cyan); font:italic 18px Georgia,serif; }.sum-result>strong { display:block; overflow-wrap:anywhere; margin:37px 0 7px; font-size:clamp(27px,3vw,42px); line-height:1.03; letter-spacing:-.06em; }.sum-result>p { min-height:28px; margin:0; color:#5e6550; font-size:10px; }.sum-components { display:grid; grid-template-columns:repeat(3,1fr); margin-top:26px; padding:14px 0; border-top:1px solid #aeb994; border-bottom:1px solid #aeb994; }.sum-components span { color:#687057; font:600 8px "Geist Mono",monospace; }.sum-components b { display:block; margin-top:4px; color:var(--ink); font-size:10px; }.sum-result button { width:100%; display:flex; align-items:center; justify-content:space-between; margin-top:20px; border:0; border-radius:6px; padding:11px 13px; background:var(--ink); color:white; font-size:11px; font-weight:650; }.sum-result button span { color:var(--coral); font-size:17px; }
.method { padding:46px 0; display:grid; grid-template-columns:.32fr 1fr; align-items:center; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }.method-flow { display:grid; grid-template-columns:auto 1fr auto 1fr auto 1fr auto; align-items:center; gap:13px; }.method-flow span { color:var(--muted); font-size:9px; line-height:1.45; }.method-flow b { display:block; color:var(--coral); font:600 8px "Geist Mono",monospace; margin-bottom:5px; }.method-flow i { height:1px; position:relative; background:var(--line); }.method-flow i::after { content:""; position:absolute; right:0; top:-2px; width:5px; height:5px; border-radius:50%; background:var(--coral); }
footer { min-height:116px; display:grid; grid-template-columns:.5fr 1fr auto; align-items:center; gap:6vw; }.footer-brand { display:flex; align-items:center; gap:10px; }.footer-brand strong { letter-spacing:-.03em; } footer p { max-width:650px; margin:0; color:var(--muted); font-size:10px; line-height:1.5; } footer>span { color:var(--muted); font:600 9px "Geist Mono",monospace; }
@media(max-width:1050px){.hero{grid-template-columns:1fr;gap:25px}.workspace{grid-template-columns:1fr}.result-panel{min-height:700px}.vector-workspace{grid-template-columns:1fr}.sum-result>strong{margin-top:25px}.method{grid-template-columns:1fr;gap:24px}}
@media(max-width:720px){.topbar{height:68px;padding:0 18px}.system-badge,.text-button{display:none}.portal-back{font-size:0;padding:9px}.portal-back span{font-size:16px}.page-shell{width:calc(100% - 28px)}.hero{padding:28px 0}.hero h1{font-size:39px}.inputs-panel,.result-panel{padding:21px 17px}.section-intro{margin-left:0}.compact-result{align-items:flex-start;flex-direction:column}.vector-heading{align-items:flex-start;flex-direction:column}.vector-inputs{grid-template-columns:1fr;padding:16px}.plus-sign{height:45px}.rx-grid{grid-template-columns:1fr 1fr}.rx-grid label:last-child{grid-column:1/-1}.metric-grid{grid-template-columns:1fr;gap:12px}.metric-grid>div+div{padding:12px 0 0;border-left:0;border-top:1px solid #393a36}.metric-grid span{min-height:0}.method-flow{grid-template-columns:1fr 1fr;gap:22px}.method-flow i{display:none}footer{grid-template-columns:1fr;gap:12px;padding:28px 0}}
@media print{.topbar,.hero,.example-button,.compact-result button,.range,.range-labels,.exact-meridian,.copy-main,.sum-result button,.method{display:none!important}body{background:white}.page-shell{width:100%}.workspace,.vector-workspace{border-radius:0;break-inside:avoid}.vector-section{padding:28px 0}.result-panel{-webkit-print-color-adjust:exact;print-color-adjust:exact}.sum-result{-webkit-print-color-adjust:exact;print-color-adjust:exact}footer{min-height:70px}.inputs-panel{padding:20px}.optical-cross{min-height:230px}}