/* Public site (STU-30). From docs/mockups/STU-30-landing-page.html. */
:root{--bg:#0d0e11;--panel:#15171c;--panel2:#1b1e24;--line:#262a32;--line2:#353b47;--text:#f3efe6;--muted:#a3a9b4;--dim:#6f7682;--accent:#f5a524;--ink:#1a1204;--ok:#3ccf8e}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 Sora,system-ui,sans-serif}
a{color:inherit;text-decoration:none}
.wrap{max-width:1760px;margin:0 auto;padding:0 clamp(16px,3vw,56px)}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:10px;padding:12px 18px;font-weight:700;font-size:15px;border:1px solid var(--line2);background:var(--panel2);color:var(--text);cursor:pointer;font-family:inherit}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.btn.sm{padding:8px 13px;font-size:14px}
/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(13,14,17,.88);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:26px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:21px;letter-spacing:-.03em}
.logo b{color:var(--accent);font-weight:800}
.nav .links{display:flex;gap:22px;font-size:14px;color:var(--muted)}
.nav .links a:hover{color:var(--text)}
.nav .sp{flex:1}
/* hero */
.hero{padding:76px 0 40px;text-align:center;background:radial-gradient(900px 380px at 50% -60px,rgba(245,165,36,.16),transparent 70%)}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--accent);border:1px solid rgba(245,165,36,.4);border-radius:30px;padding:5px 12px;margin-bottom:20px}
h1{font-size:clamp(34px,5.4vw,60px);line-height:1.06;letter-spacing:-.035em;margin:0 auto 18px;max-width:880px;font-weight:800}
h1 em{font-style:normal;color:var(--accent)}
.sub{color:var(--muted);font-size:18px;max-width:660px;margin:0 auto 28px}
.wait{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;max-width:520px;margin:0 auto}
.wait input{flex:1;min-width:220px;background:#0f1115;border:1px solid var(--line2);border-radius:10px;padding:12px 14px;color:var(--text);font:inherit;font-size:15px}
.fine{color:var(--dim);font-size:13px;margin-top:12px}
.ok{display:none;color:var(--ok);font-weight:600;margin-top:14px}
/* demo */
.demo{margin:46px auto 0;max-width:1400px;border:1px solid var(--line2);border-radius:16px;overflow:hidden;background:var(--panel);box-shadow:0 40px 120px -50px rgba(245,165,36,.35)}
.art{position:relative;overflow:hidden;background:var(--g)}
.art::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(0,0,0,.35) 1px,transparent 1.4px);background-size:5px 5px;mix-blend-mode:multiply;opacity:.55}
.g1{--g:linear-gradient(170deg,#140d06,#3b250f 50%,#c77d2a)}
.g2{--g:linear-gradient(170deg,#0b1626,#24364f 55%,#5d6f8a)}
.g3{--g:linear-gradient(170deg,#1d1030,#7a3550 50%,#e0803a)}
.g4{--g:linear-gradient(170deg,#5a4630,#b48a58 55%,#e7c58e)}
.g5{--g:linear-gradient(170deg,#06120f,#0f3a35 50%,#5fd3c4)}
.g6{--g:linear-gradient(170deg,#121316,#2c2f36 60%,#5b616c)}
.demo .art{aspect-ratio:16/9;display:grid;place-items:center}
.play{position:relative;z-index:2;width:84px;height:84px;border-radius:50%;background:var(--accent);display:grid;place-items:center;color:var(--ink);font-size:30px;padding-left:6px}
.demo .cap{position:absolute;left:18px;bottom:14px;z-index:2;font-size:13px;color:#fff;background:rgba(0,0,0,.55);padding:4px 10px;border-radius:6px}
/* sections */
section{padding:74px 0}
.kicker{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--accent);margin-bottom:10px}
h2{font-size:clamp(26px,3.4vw,38px);letter-spacing:-.03em;line-height:1.12;margin:0 0 14px;font-weight:800}
.lead{color:var(--muted);max-width:640px;margin:0 0 34px}
.grid{display:grid;gap:16px}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g-5{grid-template-columns:repeat(5,minmax(0,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}
.card h3{margin:0 0 6px;font-size:17px;letter-spacing:-.01em}
.card p{margin:0;color:var(--muted);font-size:14.5px}
/* problem */
.vs{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:14px}
.strip .art{aspect-ratio:4/3;border-radius:8px}
.tag{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.08em;padding:3px 9px;border-radius:20px}
.tag.bad{background:rgba(242,95,92,.14);color:#f58a88}
.tag.good{background:rgba(60,207,142,.14);color:var(--ok)}
/* steps */
.step .n{width:34px;height:34px;border-radius:50%;background:var(--accent);color:var(--ink);font-weight:800;display:grid;place-items:center;margin-bottom:12px}
.step h3{font-size:15.5px}
.step p{font-size:13.5px}
/* examples */
.ex .art{aspect-ratio:16/9;border-radius:10px;margin-bottom:10px;display:grid;place-items:center}
.ex .play{width:46px;height:46px;font-size:17px;padding-left:3px}
.ex small{color:var(--dim)}
/* pricing */
.price{display:grid;grid-template-columns:1.1fr 1fr;gap:16px;align-items:stretch}
.price .big{font-size:46px;font-weight:800;letter-spacing:-.03em}
.price .big span{font-size:16px;color:var(--muted);font-weight:400;letter-spacing:0}
.price ul{list-style:none;padding:0;margin:14px 0 20px;color:var(--muted);font-size:14.5px}
.price li{padding:5px 0 5px 24px;position:relative}
.price li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:700}
.hl{border-color:rgba(245,165,36,.5);box-shadow:0 0 0 1px rgba(245,165,36,.25)}
/* faq */
details{border-bottom:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::after{content:"+";color:var(--accent);font-size:20px;line-height:1}
details[open] summary::after{content:"–"}
details p{color:var(--muted);margin:10px 0 0;max-width:760px;font-size:15px}
/* cta + footer */
.cta{text-align:center;background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
footer{padding:34px 0 90px;color:var(--dim);font-size:13.5px}
footer .wrap{display:flex;gap:24px;flex-wrap:wrap;align-items:center}
footer a:hover{color:var(--text)}
@media (max-width:820px){
  .nav .links{display:none}
  .g-2,.g-3,.vs,.price{grid-template-columns:1fr}
  .g-5{grid-template-columns:repeat(2,minmax(0,1fr))}
  section{padding:54px 0}
  
}

/* additions to the mockup: real form states and small pieces */
.wait select{background:#0f1115;border:1px solid var(--line2);border-radius:10px;padding:12px 14px;color:var(--muted);font:inherit;font-size:15px;flex-basis:100%}
.wait .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.ok.show{display:block}
.err{color:#f58a88;font-weight:600;margin-top:14px}
.fine a{text-decoration:underline}
.logo img{height:34px;width:auto;display:block}
footer .logo img{height:26px}
.g-steps{grid-template-columns:repeat(var(--n,5),minmax(0,1fr))}
.soonchip{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.06em;color:var(--accent);border:1px solid rgba(245,165,36,.4);border-radius:20px;padding:1px 8px;margin-left:6px;vertical-align:middle}
@media (max-width:820px){.g-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* help page */
.dl{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.guide{padding:36px 0}
.steps{margin:0;padding-left:22px;color:var(--muted);columns:2 420px;column-gap:64px}       /* uses the page's width: two columns on wide screens */
.steps li{padding:6px 0;break-inside:avoid}
.guide .lead{max-width:980px}
.steps b{color:var(--text)}
code{background:var(--panel2);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:.9em}
.prompt{white-space:pre-wrap;background:#0f1115;border:1px solid var(--line);border-radius:10px;padding:14px;margin:10px 0 0;color:var(--text);font:13.5px/1.55 ui-monospace,Consolas,monospace}

/* legal pages */
.legal{max-width:1080px}                     /* guides and legal pages: one centred column, wide enough to fill the page without lines too long to read */
.legal h2{font-size:24px;margin:34px 0 10px}
.legal h3,.legal h4{font-size:19px;margin:24px 0 8px}
.legal p,.legal li{color:var(--muted);font-size:17px;line-height:1.7}
.legal ul,.legal ol{padding-left:22px}
.legal b{color:var(--text)}