/* Blindfold Edu — shared styles (sibling of blindfoldtax.com) */
:root{
  --ink:#0a1726; --navy-deep:#0d2137; --navy:#1a3a5c; --blue:#2c5282; --blue-light:#e6edf5;
  --gold:#d4a84b; --gold-dark:#6b4f10; --gold-muted:#6b5a1f; --gold-cream:#f0ead6;
  --cream:#f8f5ed; --white:#fff; --border:#e0dbd0; --border-heavy:#d6cdb5;
  --text:#3d3d3a; --muted:#5f5f59; --ok:#1a7a4f; --bad:#b83030;
  --f-display:'DM Serif Display',Georgia,serif;
  --f-body:'Manrope',system-ui,-apple-system,'Segoe UI',sans-serif;
  --f-mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  --r:8px; --r-lg:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--cream);color:var(--text);font-family:var(--f-body);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--gold);color:var(--ink);padding:8px 14px;border-radius:var(--r);font-weight:700;z-index:99}
.skip:focus{left:12px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}
h1,h2,h3{font-family:var(--f-display);font-weight:400;color:var(--navy-deep);line-height:1.12;margin:0;text-wrap:balance}
h1{font-size:clamp(2.3rem,5.4vw,4rem)}
h2{font-size:clamp(1.8rem,3.6vw,2.6rem)}
h3{font-size:1.35rem}
p{margin:0}
.eyebrow{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-muted);font-weight:500}
.dark .eyebrow{color:var(--gold)}
.lead{font-size:1.18rem;color:var(--muted);max-width:640px}
.stack>*+*{margin-top:18px}
.top{position:sticky;top:0;z-index:50;background:rgba(10,23,38,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(212,168,75,.18)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-block:14px}
.brand{display:flex;align-items:center;gap:10px;color:var(--cream);text-decoration:none;font-family:var(--f-display);font-size:1.35rem}
.brand small{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;color:var(--gold);border:1px solid rgba(212,168,75,.5);border-radius:99px;padding:2px 8px}
.mark{width:30px;height:30px}
.links{display:flex;gap:22px;align-items:center;font-size:.93rem;font-weight:600}
.links a{color:#c9d3df;text-decoration:none}
.links a:hover,.links a[aria-current]{color:var(--gold)}
@media (max-width:820px){.links a:not(.btn){display:none}}
@media (max-width:420px){.brand small{display:none}.links .btn{padding:7px 12px;font-size:.85rem}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:700;font-size:.95rem;padding:12px 22px;border-radius:var(--r);border:1px solid transparent;text-decoration:none;cursor:pointer;white-space:nowrap;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px)}
.btn-gold{background:var(--gold);color:var(--ink)}
.btn-gold:hover{box-shadow:0 8px 24px rgba(212,168,75,.35)}
.btn-ghost{border-color:rgba(240,234,214,.4);color:var(--cream)}
.btn-navy{background:var(--navy-deep);color:var(--cream)}
.links .btn,.links .btn[aria-current]{padding:8px 16px;color:var(--ink)}
.dark{background:radial-gradient(1200px 600px at 80% -10%,#173556 0%,var(--ink) 60%);color:#c9d3df}
.dark h1,.dark h2,.dark h3{color:var(--cream)}
.dark .lead{color:#aebccb}
.hero{padding:84px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr}}
.hero h1 em{font-style:normal;color:var(--gold)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.chips{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:26px;font-size:.88rem;color:#9fb0c2}
.chips span::before{content:"\25C6  ";color:var(--gold);font-size:.7em}
.sheet{background:#0f2238;border:1px solid rgba(212,168,75,.25);border-radius:var(--r-lg);box-shadow:0 30px 80px rgba(0,0,0,.45);overflow:hidden}
.sheet-head{display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.08);font-family:var(--f-mono);font-size:.78rem;color:#9fb0c2}
.seg{display:inline-flex;background:rgba(255,255,255,.06);border-radius:99px;padding:3px}
.seg button{white-space:nowrap;font:inherit;font-size:.74rem;border:0;background:none;color:#c9d3df;padding:5px 11px;border-radius:99px;cursor:pointer}
.seg button[aria-pressed=true]{background:var(--gold);color:var(--ink);font-weight:600}
.sheet table{width:100%;border-collapse:collapse;font-family:var(--f-mono);font-size:.8rem}
.sheet th{color:var(--gold);font-weight:500;text-align:left;padding:9px 14px;border-bottom:1px solid rgba(255,255,255,.08);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase}
.sheet td{padding:9px 14px;border-bottom:1px solid rgba(255,255,255,.05);color:#dfe6ee;white-space:nowrap}
.tok{color:var(--gold);background:rgba(212,168,75,.12);border-radius:4px;padding:1px 5px}
.pii{color:#ffd9d0}
.sheet-foot{padding:10px 16px;font-size:.78rem;color:#9fb0c2}
section{padding:88px 0}
.band-white{background:var(--white)}
.band-cream{background:var(--cream)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
@media (max-width:860px){.split{grid-template-columns:1fr}}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:40px}
.card{background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);padding:26px}
.band-white .card{background:var(--cream)}
.card .num{font-family:var(--f-mono);color:var(--gold-muted);font-size:.8rem}
.card h3{margin:8px 0 10px}
.card p{color:var(--muted);font-size:.98rem}
.film-sec{padding:72px 0}
.film{position:relative;border-radius:var(--r-lg);overflow:hidden;background:var(--ink);box-shadow:0 30px 90px rgba(10,23,38,.35);aspect-ratio:16/9}
.film-ctl{display:flex;align-items:center;gap:12px;margin-top:14px;flex-wrap:wrap}
.film-ctl button{font:inherit;font-weight:600;font-size:.88rem;border:1px solid var(--border-heavy);background:var(--white);color:var(--navy-deep);border-radius:var(--r);padding:8px 14px;cursor:pointer}
.film-ctl button.primary{background:var(--navy-deep);color:var(--cream);border-color:var(--navy-deep)}
.scrub{flex:1;min-width:160px;accent-color:var(--gold)}
.time{font-family:var(--f-mono);font-size:.82rem;color:var(--muted);min-width:92px}
.chapters{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chapters button{font:inherit;font-size:.82rem;border:1px solid var(--border);background:var(--cream);color:var(--text);border-radius:99px;padding:6px 12px;cursor:pointer}
.chapters button[aria-current=true]{background:var(--gold);border-color:var(--gold);color:var(--ink);font-weight:700}
details.transcript{margin-top:18px;background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);padding:14px 18px}
details.transcript summary{cursor:pointer;font-weight:700;color:var(--navy-deep)}
details.transcript ol{margin:12px 0 0;padding-left:20px;color:var(--muted)}
.map{background:var(--ink);border-radius:var(--r-lg);padding:26px;color:#c9d3df}
.map svg{width:100%;height:auto;display:block}
.node{cursor:pointer}
.node rect{fill:#13294a;stroke:rgba(212,168,75,.35);stroke-width:1.5;transition:fill .2s}
.node:hover rect,.node:focus rect,.node[aria-pressed=true] rect{fill:#1d3a63;stroke:var(--gold)}
.node text{fill:var(--cream);font-family:var(--f-body);font-size:15px;font-weight:600}
.node .sub{fill:#9fb0c2;font-size:11.5px;font-weight:500;font-family:var(--f-mono)}
.wire{stroke:rgba(212,168,75,.45);stroke-width:2;fill:none;stroke-dasharray:6 6}
.wire.live{stroke:var(--gold);animation:dash 1.2s linear infinite}
@keyframes dash{to{stroke-dashoffset:-24}}
.map-note{margin-top:18px;background:rgba(255,255,255,.05);border-left:3px solid var(--gold);padding:14px 18px;border-radius:0 var(--r) var(--r) 0;min-height:110px}
.map-note h3{color:var(--cream);font-size:1.15rem;margin-bottom:6px}
.calc{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);padding:30px;margin-top:36px}
@media (max-width:820px){.calc{grid-template-columns:1fr}}
.calc label{display:flex;justify-content:space-between;font-weight:600;font-size:.92rem;color:var(--navy-deep);margin-top:16px}
.calc input[type=range]{width:100%;accent-color:var(--gold)}
.out{background:var(--ink);color:var(--cream);border-radius:var(--r-lg);padding:26px;display:flex;flex-direction:column;justify-content:center;gap:6px}
.out .big{font-family:var(--f-display);font-size:3.2rem;color:var(--gold);line-height:1}
.out small{color:#9fb0c2}
.steps{counter-reset:s;display:grid;gap:18px;margin-top:36px}
.step{display:grid;grid-template-columns:56px 1fr;gap:18px;background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px}
.step::before{counter-increment:s;content:counter(s);font-family:var(--f-display);font-size:2rem;color:var(--gold-muted);line-height:1}
.form{background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);padding:30px;display:grid;gap:16px}
.form label{font-weight:700;font-size:.92rem;color:var(--navy-deep);display:block;margin-bottom:6px}
.form input,.form select{font:inherit;font-size:1rem;width:100%;padding:11px 13px;border:1px solid var(--border-heavy);border-radius:var(--r);background:var(--white);color:var(--text)}
.req{color:var(--bad)}
.msg{padding:14px 16px;border-radius:var(--r);font-weight:600}
.msg.ok{background:rgba(26,122,79,.1);color:var(--ok)}
.msg.err{background:rgba(184,48,48,.08);color:var(--bad)}
.prose h2{margin:48px 0 14px;font-size:1.8rem}
.prose ul{padding-left:22px}
.prose li+li{margin-top:8px}
.prose code{font-family:var(--f-mono);background:var(--gold-cream);padding:1px 6px;border-radius:4px;font-size:.9em}
.callout{background:var(--white);border:1px solid var(--border);border-left:4px solid var(--gold);border-radius:var(--r);padding:18px 20px;margin:22px 0}
.band-white .callout{background:var(--cream)}
.page-hero{padding:70px 0 50px}
.closer{text-align:center;padding:96px 0}
.closer .lead{margin:16px auto 0}
.closer .cta-row{justify-content:center}
footer{background:var(--ink);color:#8fa0b3;font-size:.88rem;padding:36px 0;border-top:1px solid rgba(255,255,255,.06)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
footer a{color:#c9d3df;text-decoration:none;margin-right:18px}
footer a:hover{color:var(--gold)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}