/* ¿Qué BMS lleva mi batería? — guía técnica para clientes aprobados.
   Layout: banco de pruebas — un simulador vivo arriba, la calculadora de taller abajo, reglas al final */
:root{
  --bg:#f3f5f8; --surface:#ffffff; --ink:#16202c; --muted:#5a6676; --line:#d5dbe3;
  --accent:#1f4fd1; --copper:#c0622a; --ok:#1d8a4e; --warn:#b7791f; --bad:#c43333;
  --cell:#2b3a4d; --cell-top:#8fa0b5;
  --f-display:"Bricolage Grotesque", "Arial Narrow", system-ui, sans-serif;
  --f-body:"Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono:"JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --bg:#0f141b; --surface:#171e28; --ink:#e7ecf3; --muted:#9aa6b6; --line:#2a3442;
  --accent:#7d9cff; --copper:#e58a52; --ok:#4cc483; --warn:#e3a94a; --bad:#ff6b6b;
  --cell:#3a4b61; --cell-top:#a9b8cb; color-scheme:dark } }
:root[data-theme="dark"]{
  --bg:#0f141b; --surface:#171e28; --ink:#e7ecf3; --muted:#9aa6b6; --line:#2a3442;
  --accent:#7d9cff; --copper:#e58a52; --ok:#4cc483; --warn:#e3a94a; --bad:#ff6b6b;
  --cell:#3a4b61; --cell-top:#a9b8cb; color-scheme:dark }

*{box-sizing:border-box}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.55;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:28px 48px}
img{max-width:100%}
[hidden]{display:none!important}
.wrap{max-width:1040px;margin:0 auto;display:flex;flex-direction:column;gap:56px}
h1,h2,h3{font-family:var(--f-display);text-wrap:balance;margin:0;line-height:1.08;color:var(--ink)}
h1{font-size:clamp(2rem,5.4vw,3.6rem);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3.4vw,2.1rem);font-weight:800;letter-spacing:-.01em}
h3{font-size:1.15rem;font-weight:600}
p{margin:0;max-width:65ch}
.eyebrow{font-family:var(--f-mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--copper);font-weight:700}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
header{display:flex;flex-direction:column;gap:14px}
.volver{align-self:flex-start;font-size:.85rem;font-weight:600;color:var(--accent);text-decoration:none}
.volver:hover{text-decoration:underline}
.lede{font-size:1.15rem;color:var(--muted)}
.lede strong{color:var(--ink)}

/* Simulador */
.sim{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.sim canvas{display:block;width:100%;height:300px}
.controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;padding:20px;border-top:1px solid var(--line)}
@media (max-width:900px){.controls{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.controls{grid-template-columns:1fr}.sim canvas{height:250px}}
.ctl{display:flex;flex-direction:column;gap:8px;min-width:0}
.ctl label{font-weight:600;font-size:.95rem;display:flex;justify-content:space-between;gap:8px}
.ctl label .mono{color:var(--accent)}
.ctl small{color:var(--muted);font-size:.82rem}
input[type=range]{width:100%;accent-color:var(--accent)}
select,input[type=number]{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:9px 10px;width:100%}
select:focus-visible,input:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.verdict{display:flex;gap:14px;align-items:flex-start;padding:16px 20px;border-top:1px solid var(--line)}
.pill{font-family:var(--f-mono);font-weight:700;font-size:.8rem;padding:4px 10px;border-radius:999px;white-space:nowrap;color:#fff}
.pill.ok{background:var(--ok)}.pill.warn{background:var(--warn)}.pill.bad{background:var(--bad)}
.verdict p{max-width:none}
.note{padding:0 20px 18px;color:var(--muted);font-size:.92rem}
.note.flash{color:var(--accent)}

/* Calculadora */
.calc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px}
@media (max-width:820px){.calc{grid-template-columns:1fr}}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form .full{grid-column:1/-1}
@media (max-width:460px){.form{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font-weight:600;font-size:.92rem}
.field small{color:var(--muted);font-size:.8rem}
.result{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;flex-direction:column;gap:18px;min-width:0}
.big{display:flex;flex-direction:column;gap:4px}
.big .val{font-family:var(--f-display);font-weight:800;font-size:clamp(2rem,6vw,2.8rem);line-height:1;color:var(--accent)}
.rows{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.row{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.95rem}
.row span:first-child{color:var(--muted)}
.row span:last-child{text-align:right}
.row.key span:last-child{color:var(--ink);font-weight:700}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.95rem}
.check .pill{margin-top:2px}
.cellnote{font-size:.85rem;color:var(--muted)}

/* Reglas */
.rules{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
@media (max-width:820px){.rules{grid-template-columns:1fr}}
.rule{display:flex;flex-direction:column;gap:8px;padding-top:14px;border-top:3px solid var(--copper)}
.rule p{color:var(--muted);font-size:.96rem}
.myth{display:flex;flex-direction:column;gap:10px}
.myth .wrong{text-decoration:line-through;text-decoration-color:var(--bad);color:var(--muted)}
footer{color:var(--muted);font-size:.85rem;border-top:1px solid var(--line);padding-top:16px}
section{display:flex;flex-direction:column;gap:20px}

/* Cartel de registro mayorista (visitantes y clientes no aprobados) */
.cta{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;background:#ffc93c;color:#1a1300;border-radius:14px;padding:16px 20px}
.cta div{display:flex;flex-direction:column;gap:2px;flex:1 1 320px;min-width:0}
.cta strong{font-family:var(--f-display);font-size:1.2rem;font-weight:800}
.cta span{font-size:.95rem}
.cta-btn{background:#1a1300;color:#ffc93c;font-weight:700;text-decoration:none;padding:11px 18px;border-radius:8px;white-space:nowrap}
.cta-btn:hover{background:#000}
@media (max-width:560px){.cta-btn{flex:1 1 100%;text-align:center}}