:root{
  --bg:#f7f6f2;--surface:#ffffff;--ink:#16181d;--muted:#5b6170;--line:#e3e1da;
  --brand:#f2b705;--brand-ink:#1a1400;--accent:#1f4fd1;--ok:#1e8a4c;--no:#c0392b;
  --radius:16px;--shadow:0 10px 30px rgba(20,22,30,.08);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#111318;--surface:#1a1d24;--ink:#eef0f4;--muted:#a3a9b7;--line:#2a2e38;
    --accent:#7aa2ff;--shadow:0 10px 30px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --bg:#111318;--surface:#1a1d24;--ink:#eef0f4;--muted:#a3a9b7;--line:#2a2e38;
  --accent:#7aa2ff;--shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.65;font-size:17px}
img{max-width:100%;display:block}
a{color:var(--accent)}
h1,h2,h3{font-family:"Space Grotesk","Inter",sans-serif;line-height:1.2;letter-spacing:-.01em}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* Aviso superior */
.notice{background:var(--brand);color:var(--brand-ink);font-size:14px;font-weight:600;text-align:center;padding:8px 16px}

/* Navegación */
header.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;text-decoration:none;color:var(--ink);font-family:"Space Grotesk",sans-serif}
.plate{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:var(--brand-ink);border:2px solid var(--brand-ink);border-radius:6px;font-weight:800;font-size:13px;padding:2px 7px;letter-spacing:.06em}
.menu{display:flex;gap:4px;align-items:center}
.menu a{color:var(--ink);text-decoration:none;font-size:15px;padding:8px 12px;border-radius:999px}
.menu a:hover{background:var(--surface)}
.icon-btn{background:var(--surface);border:1px solid var(--line);color:var(--ink);border-radius:999px;width:40px;height:40px;cursor:pointer;font-size:18px}
.burger{display:none}
@media (max-width:860px){
  .burger{display:inline-block}
  .menu{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg);border-bottom:1px solid var(--line);padding:10px 16px;display:none}
  .menu.open{display:flex}
}

/* Hero */
.hero{position:relative;min-height:78vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scale(1.05);transition:transform 1.2s ease}
.hero.loaded img{transform:scale(1)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,12,18,.15) 0%,rgba(10,12,18,.55) 45%,rgba(10,12,18,.92) 100%)}
.hero .wrap{position:relative;z-index:2;padding-bottom:64px;padding-top:120px}
.tag{display:inline-block;background:var(--brand);color:var(--brand-ink);font-weight:700;font-size:13px;padding:4px 12px;border-radius:999px;margin-bottom:16px}
.hero h1{font-size:clamp(36px,6vw,68px);margin:0 0 16px;max-width:820px}
.hero p{font-size:clamp(17px,2vw,20px);max-width:640px;opacity:.92;margin:0 0 28px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:var(--brand-ink);font-weight:700;text-decoration:none;padding:13px 22px;border-radius:999px;border:0;cursor:pointer;font-size:16px}
.btn.ghost{background:transparent;color:inherit;border:1.5px solid currentColor}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
.credit{position:absolute;right:12px;bottom:8px;z-index:2;font-size:11px;opacity:.6}

/* Secciones */
section{padding:84px 0}
.eyebrow{color:var(--accent);font-weight:700;text-transform:uppercase;font-size:13px;letter-spacing:.12em}
.section-title{font-size:clamp(28px,4vw,42px);margin:8px 0 14px}
.lead{color:var(--muted);max-width:720px;font-size:18px}
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media (max-width:900px){.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g3,.g2{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.card h3{margin:10px 0 8px;font-size:20px}
.card p{margin:0;color:var(--muted)}
.emoji{font-size:30px}
.alt{background:var(--surface);border-block:1px solid var(--line)}
.alt .card{background:var(--bg)}

/* Independencia */
.independent{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start;background:linear-gradient(135deg,color-mix(in srgb,var(--brand) 22%,var(--surface)),var(--surface));border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.independent .big{font-size:42px}
@media (max-width:600px){.independent{grid-template-columns:1fr}}

/* Simulador */
.sim{display:grid;grid-template-columns:1.1fr 1fr;gap:24px}
@media (max-width:860px){.sim{grid-template-columns:1fr}}
.digits{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:14px 0 20px}
.digit{aspect-ratio:1;border-radius:12px;border:2px solid var(--line);background:var(--bg);color:var(--ink);font-size:24px;font-weight:800;cursor:pointer;font-family:"Space Grotesk",sans-serif;transition:.15s}
.digit:hover{border-color:var(--accent)}
.digit.on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand-ink);transform:translateY(-2px)}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 18px}
.seg button{border:1.5px solid var(--line);background:var(--bg);color:var(--ink);padding:8px 14px;border-radius:999px;cursor:pointer;font-size:14px}
.seg button.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
label.small{font-weight:600;font-size:14px;color:var(--muted)}
.result{border-radius:var(--radius);padding:26px;text-align:center;border:2px dashed var(--line);min-height:220px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px}
.result .plate-big{font-family:"Space Grotesk",sans-serif;font-size:34px;font-weight:800;background:var(--brand);color:var(--brand-ink);border:3px solid var(--brand-ink);border-radius:10px;padding:8px 18px;letter-spacing:.12em}
.result.ok{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 10%,transparent)}
.result.no{border-color:var(--no);background:color-mix(in srgb,var(--no) 10%,transparent)}
.result strong{font-size:22px}
.week{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-top:14px;width:100%}
.day{border-radius:8px;padding:8px 2px;font-size:12px;text-align:center;background:var(--bg);border:1px solid var(--line)}
.day b{display:block;font-size:15px}
.day.r{background:color-mix(in srgb,var(--no) 18%,var(--bg));border-color:var(--no)}
.day.f{background:color-mix(in srgb,var(--ok) 14%,var(--bg));border-color:var(--ok)}
.disclaimer{font-size:13px;color:var(--muted);margin-top:12px}

/* Línea de tiempo */
.timeline{position:relative;margin-top:30px;padding-left:28px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:3px;background:var(--line);border-radius:3px}
.tl-item{position:relative;margin-bottom:26px}
.tl-item::before{content:"";position:absolute;left:-26px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--brand);border:3px solid var(--bg);box-shadow:0 0 0 2px var(--brand-ink)}
.tl-item h3{margin:0 0 4px;font-size:18px}
.tl-item p{margin:0;color:var(--muted)}

/* Tabs */
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0 18px}
.tabs button{border:1.5px solid var(--line);background:var(--surface);color:var(--ink);padding:10px 18px;border-radius:999px;cursor:pointer;font-weight:600}
.tabs button.on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand-ink)}
.panel{display:none}
.panel.on{display:block;animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.panel ul{margin:10px 0 0;padding-left:20px;color:var(--muted)}

/* Quiz */
.quiz{max-width:760px}
.q-progress{height:6px;background:var(--line);border-radius:6px;overflow:hidden;margin-bottom:20px}
.q-progress span{display:block;height:100%;background:var(--brand);width:0;transition:width .3s}
.q-opts{display:grid;gap:10px;margin-top:16px}
.q-opts button{text-align:left;border:1.5px solid var(--line);background:var(--bg);color:var(--ink);padding:14px 16px;border-radius:12px;cursor:pointer;font-size:16px}
.q-opts button:hover:not(:disabled){border-color:var(--accent)}
.q-opts button.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,var(--bg))}
.q-opts button.wrong{border-color:var(--no);background:color-mix(in srgb,var(--no) 12%,var(--bg))}
.q-exp{margin-top:14px;color:var(--muted);display:none}
.q-foot{display:flex;justify-content:space-between;align-items:center;margin-top:18px;gap:12px;flex-wrap:wrap}

/* FAQ */
details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:4px 20px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::after{content:"+";font-size:22px;line-height:1;transition:.2s}
details[open] summary::after{transform:rotate(45deg)}
details p{color:var(--muted);margin:0 0 16px}

/* Consejos checklist */
.check{display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line);cursor:pointer}
.check input{width:20px;height:20px;margin-top:3px;accent-color:var(--ok)}
.check.done span{text-decoration:line-through;color:var(--muted)}

/* Footer */
footer{background:#0e1015;color:#c9cdd6;padding:56px 0 28px;font-size:15px}
footer a{color:#fff}
footer h4{color:#fff;margin:0 0 12px;font-family:"Space Grotesk",sans-serif}
.foot-grid{display:grid;grid-template-columns:2fr 1.3fr 1fr;gap:30px}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr}}
.foot-bottom{border-top:1px solid #262a33;margin-top:36px;padding-top:20px;font-size:13px;color:#8d93a1}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin-bottom:6px}

/* Páginas legales */
.legal{max-width:820px;margin:0 auto;padding:56px 20px 80px}
.legal h1{font-size:clamp(30px,5vw,44px);margin-bottom:6px}
.legal h2{font-size:22px;margin-top:36px}
.legal .updated{color:var(--muted);font-size:14px}
.legal .box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin:24px 0}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 24px}
.toc ol{margin:6px 0 0;padding-left:20px}

/* Animación al hacer scroll */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.hero img{transition:none}}

.to-top{position:fixed;right:18px;bottom:18px;width:46px;height:46px;border-radius:50%;border:0;background:var(--brand);color:var(--brand-ink);font-size:20px;cursor:pointer;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s;z-index:60}
.to-top.show{opacity:1;pointer-events:auto}
.progress{position:fixed;top:0;left:0;height:3px;background:var(--accent);width:0;z-index:100}

/* Fotos */
.photo{margin:30px 0 0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--surface)}
.photo img{width:100%;aspect-ratio:16/7;object-fit:cover;transition:transform .8s ease}
.photo:hover img{transform:scale(1.03)}
.photo figcaption{padding:12px 18px;font-size:14px;color:var(--muted)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
.split .photo{margin:0}
.split .photo img{aspect-ratio:4/3}
@media (max-width:860px){.split{grid-template-columns:1fr}.photo img{aspect-ratio:16/9}}