/* Guías de memorybrain.ai: mismos tokens que la landing. */
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@media (prefers-color-scheme:dark){:root{
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}}
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.brand img{width:28px;height:28px;border-radius:7px}
.top nav{display:flex;gap:18px;font-size:.95rem;color:var(--ink-dim)}
.top nav a{text-decoration:none;white-space:nowrap}
@media (max-width:520px){.top nav{gap:12px;font-size:.86rem}.brand{font-size:1.05rem}.top nav a[href="/openbrain/"]{display:none}}
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h1{font-size:clamp(2rem,5.4vw,2.9rem);margin:0 0 20px}
h2{font-size:1.6rem;margin:56px 0 14px;padding-top:20px;border-top:1px solid var(--line)}
h3{font-size:1.2rem;margin:28px 0 8px}
.answer{font-size:1.15rem;line-height:1.6;margin:0 0 18px}
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th{font-weight:600;color:var(--ink-dim)}
details{border-bottom:1px solid var(--line);padding:12px 0}
summary{cursor:pointer;font-weight:600}
details p{margin:.5rem 0 0}
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.btn{display:inline-block;background:var(--seal);color:var(--seal-ink);text-decoration:none;font-weight:600;padding:.75rem 1.2rem;border-radius:999px}
.btn:hover{color:var(--seal-ink);filter:brightness(1.05)}
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footer a{text-decoration:none}