/* ===================================================================
   ESTUDIANDO CON FELIPE — Estilos
   Paleta Toro Taxes: Toro Red #FF0009, degradados #BB0007 / #750004,
   negro #000, blanco #fff, beige #CAC1B7. (Rojo viejo #ED3237 NO se usa.)
   Tipografía: Mont (se carga abajo si subes los .woff2 a /fonts).
   =================================================================== */

/* ---- Mont — fuente oficial de marca, self-hosted (Brand Book 2025). ---- */
@font-face{font-family:"Mont";src:url("/fonts/Mont-Regular.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Mont";src:url("/fonts/Mont-Italic.woff2") format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Mont";src:url("/fonts/Mont-SemiBold.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"Mont";src:url("/fonts/Mont-Bold.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:"Mont";src:url("/fonts/Mont-Heavy.woff2") format("woff2");font-weight:800;font-style:normal;font-display:swap}

:root{
  --red:#FF0009;
  --red-deep:#BB0007;
  --red-dark:#750004;
  --red-text:#BB0007;
  --beige:#CAC1B7;

  --bg:#FAF7F4;
  --bg-soft:#F2ECE6;
  --surface:#FFFFFF;
  --ink:#15110F;
  --ink-soft:#5C544E;
  --line:#E4DBD2;
  --line-strong:#D6Cabf;
  --shadow:0 1px 2px rgba(20,17,15,.04), 0 12px 30px -18px rgba(20,17,15,.22);
  --shadow-lg:0 30px 60px -30px rgba(117,0,4,.28);

  --font:"Mont", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --maxw:1080px;
  --radius:18px;
  --radius-sm:12px;
}
[data-theme="dark"]{
  --bg:#0E0D0C;
  --bg-soft:#181613;
  --surface:#181613;
  --red-text:#FF0009;
  --ink:#F4EFEA;
  --ink-soft:#A89E95;
  --line:#2A2522;
  --line-strong:#3A332E;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 16px 40px -22px rgba(0,0,0,.8);
  --shadow-lg:0 40px 70px -34px rgba(255,0,9,.35);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);
  line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* keyboard focus visible everywhere (WCAG 2.1 AA / ADA) */
:focus-visible{outline:3px solid var(--red);outline-offset:2px;border-radius:6px}
/* skip link */
.skip{position:absolute;left:-9999px;top:8px;z-index:200;background:var(--red);color:#fff;padding:10px 16px;border-radius:10px;font-weight:700}
.skip:focus{left:12px}

/* ---------------------------- HEADER ---------------------------- */
.site-head{
  position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line);
}
.site-head .bar{display:flex;align-items:center;gap:16px;height:66px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand .logo{height:42px;width:auto;display:block}
.brand .logo.dark{display:none}
[data-theme="dark"] .brand .logo.light{display:none}
[data-theme="dark"] .brand .logo.dark{display:block}
.brand .tag-sep{width:1px;height:26px;background:var(--line-strong);margin:0 2px}
.brand .study{font-weight:700;letter-spacing:-.01em;font-size:.95rem;line-height:1;color:var(--ink)}
.brand .study small{display:block;font-weight:600;font-size:.6rem;letter-spacing:.14em;color:var(--ink-soft);text-transform:uppercase;margin-top:3px}
.head-actions{margin-left:auto;display:flex;align-items:center;gap:6px}
.icon-btn{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;color:var(--ink-soft);transition:.18s}
.icon-btn:hover{background:var(--bg-soft);color:var(--ink)}
.icon-btn svg{width:20px;height:20px}

/* ---------------------------- HERO ------------------------------ */
.hero{padding:54px 0 30px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 120% at 88% -10%,rgba(255,0,9,.10),transparent 60%);
}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.72rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--red-text);}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red);display:inline-block}
.hero h1{
  font-size:clamp(2.5rem,7vw,4.4rem);line-height:.98;letter-spacing:-.035em;font-weight:800;
  margin:.35em 0 .28em;
}
.hero h1 em{font-style:normal;color:var(--red)}
.lead{font-size:clamp(1.02rem,2.4vw,1.22rem);color:var(--ink-soft);max-width:60ch;margin:0}

/* --------------------------- PART CARDS ------------------------- */
.parts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:38px 0 6px}
.part-card{
  position:relative;display:flex;flex-direction:column;gap:10px;padding:26px 24px 22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  transition:transform .22s cubic-bezier(.2,.7,.2,1),box-shadow .22s,border-color .22s;
  overflow:hidden;min-height:210px;
}
.part-card::after{content:"";position:absolute;left:0;top:0;height:100%;width:4px;background:linear-gradient(var(--red),var(--red-dark));transform:scaleY(0);transform-origin:top;transition:transform .25s}
.part-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--line-strong)}
.part-card:hover::after{transform:scaleY(1)}
.part-card .num{font-size:2.4rem;font-weight:800;letter-spacing:-.04em;color:var(--beige);line-height:1}
[data-theme="dark"] .part-card .num{color:var(--line-strong)}
.part-card h2{font-size:1.28rem;letter-spacing:-.02em;margin:2px 0 0;font-weight:700}
.part-card .en{font-size:.74rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--red-text)}
.part-card p{margin:0;color:var(--ink-soft);font-size:.93rem}
.part-card .go{margin-top:auto;display:inline-flex;align-items:center;gap:7px;font-weight:700;font-size:.9rem;color:var(--ink)}
.part-card .go svg{width:16px;height:16px;transition:transform .2s}
.part-card:hover .go svg{transform:translateX(4px)}

/* --------------------------- METHOD BAND ------------------------ */
.method{margin:46px 0 8px;padding:30px;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius)}
.method h3{margin:0 0 4px;font-size:1.08rem;letter-spacing:-.01em}
.method .sub{color:var(--ink-soft);font-size:.92rem;margin:0 0 20px}
.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.m-item{display:flex;gap:13px;align-items:flex-start}
.m-item .n{flex:0 0 auto;width:30px;height:30px;border-radius:9px;background:var(--surface);border:1px solid var(--line-strong);display:grid;place-items:center;color:var(--red-text);font-weight:800;font-size:.9rem}
.m-item b{display:block;font-size:.96rem}
.m-item span{font-size:.86rem;color:var(--ink-soft)}

/* ----------------------- REPASO (spaced rep) -------------------- */
.repaso{margin:34px 0 0;padding:24px 26px;border:1px dashed var(--line-strong);border-radius:var(--radius);background:var(--surface)}
.repaso h3{margin:0 0 3px;font-size:1.05rem;display:flex;align-items:center;gap:9px}
.repaso h3 .dot{width:9px;height:9px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px rgba(255,0,9,.15)}
.repaso .empty{color:var(--ink-soft);font-size:.92rem;margin:6px 0 0}
.repaso-list{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}
.repaso-list li{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:var(--radius-sm);background:var(--bg-soft);border:1px solid var(--line)}
.repaso-list li.due{border-color:var(--red-text);background:color-mix(in srgb,var(--red) 7%,var(--surface))}
.repaso-list .when{font-size:.76rem;font-weight:700;letter-spacing:.04em;padding:3px 9px;border-radius:999px;background:var(--surface);border:1px solid var(--line-strong);color:var(--ink-soft);white-space:nowrap}
.repaso-list li.due .when{background:var(--red);color:#fff;border-color:var(--red-text)}
.repaso-list .t-name{font-weight:600;font-size:.93rem;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.repaso-list .rm{color:var(--ink-soft);font-size:1.3rem;line-height:1;padding:0 4px}
.repaso-list .rm:hover{color:var(--red-text)}

/* ----------------------------- PART VIEW ------------------------ */
.crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:.84rem;color:var(--ink-soft);padding:26px 0 0}
.crumbs a{font-weight:600}.crumbs a:hover{color:var(--red-text)}
.crumbs .sep{opacity:.5}
.section-head{padding:14px 0 4px}
.section-head .en{font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--red-text)}
.section-head h1{font-size:clamp(1.9rem,5vw,2.8rem);letter-spacing:-.03em;margin:.2em 0 .15em;line-height:1.02}
.section-head p{color:var(--ink-soft);max-width:60ch;margin:0}

.topic-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:26px 0 60px}
.topic-card{
  position:relative;display:flex;flex-direction:column;gap:8px;padding:22px 22px 20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s,border-color .2s;
}
.topic-card:not(.soon):hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--line-strong)}
.topic-card h2{margin:0;font-size:1.15rem;letter-spacing:-.01em}
.topic-card p{margin:0;color:var(--ink-soft);font-size:.9rem}
.topic-card .meta{margin-top:auto;display:flex;align-items:center;gap:10px;padding-top:8px}
.tag{font-size:.68rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:4px 9px;border-radius:999px}
.tag.ready{color:var(--red-text);background:color-mix(in srgb,var(--red) 10%,transparent)}
.tag.soon{color:var(--ink-soft);background:var(--bg-soft);border:1px solid var(--line)}
.topic-card.soon{opacity:.72;cursor:default}
.topic-card .arrow{margin-left:auto;color:var(--ink-soft)}
.topic-card .arrow svg{width:18px;height:18px;transition:transform .2s}
.topic-card:not(.soon):hover .arrow svg{transform:translateX(4px);color:var(--red-text)}
.empty-state{margin:30px 0 60px;padding:40px 30px;text-align:center;border:1px dashed var(--line-strong);border-radius:var(--radius);color:var(--ink-soft)}
.empty-state b{color:var(--ink);display:block;font-size:1.1rem;margin-bottom:6px}

/* ----------------------------- TOPIC VIEW ----------------------- */
.topic{padding-bottom:70px}
.topic .head-row{display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap;padding:12px 0 0}
.topic h1{font-size:clamp(1.8rem,4.6vw,2.6rem);letter-spacing:-.03em;line-height:1.05;margin:.1em 0 0;flex:1;min-width:260px}
.updated{font-size:.72rem;font-weight:700;letter-spacing:.06em;color:var(--ink-soft);padding:6px 12px;border:1px solid var(--line-strong);border-radius:999px;white-space:nowrap}

.block{margin:30px 0 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.block > .b-head{display:flex;align-items:center;gap:13px;padding:18px 22px;border-bottom:1px solid var(--line)}
.block > .b-head .b-ic{width:34px;height:34px;border-radius:10px;flex:0 0 auto;display:grid;place-items:center;background:linear-gradient(135deg,var(--red),var(--red-dark));color:#fff}
.block > .b-head .b-ic svg{width:18px;height:18px}
.block > .b-head .b-ic.plain{background:var(--bg-soft);color:var(--red-text);border:1px solid var(--line-strong)}
.block > .b-head h2{margin:0;font-size:1.12rem;letter-spacing:-.01em}
.block > .b-head .b-sub{font-size:.76rem;color:var(--ink-soft);font-weight:600;letter-spacing:.04em}
.block .b-body{padding:20px 22px}
.block .b-body > :first-child{margin-top:0}
.block .b-body > :last-child{margin-bottom:0}
.block p{margin:0 0 12px}
.feynman p{font-size:1.04rem}

ol.keys{margin:0;padding:0;list-style:none;counter-reset:k}
ol.keys li{position:relative;padding:11px 0 11px 44px;border-bottom:1px solid var(--line);counter-increment:k}
ol.keys li:last-child{border-bottom:none}
ol.keys li::before{content:counter(k);position:absolute;left:0;top:9px;width:28px;height:28px;border-radius:8px;background:var(--bg-soft);border:1px solid var(--line-strong);color:var(--red-text);font-weight:800;font-size:.82rem;display:grid;place-items:center}

.faqs{display:flex;flex-direction:column}
.qa{border-bottom:1px solid var(--line)}
.qa:last-child{border-bottom:none}
.qa .q{width:100%;text-align:left;display:flex;align-items:center;gap:12px;padding:15px 0;font-weight:600;font-size:1rem}
.qa .q .chev{margin-left:auto;color:var(--ink-soft);transition:transform .22s;flex:0 0 auto}
.qa .q .chev svg{width:18px;height:18px;display:block}
.qa.open .q .chev{transform:rotate(180deg)}
.qa .a{max-height:0;overflow:hidden;transition:max-height .28s ease;color:var(--ink-soft)}
.qa .a .inner{display:block;padding:0 0 16px}

.recall .qa .q{color:var(--ink)}
.recall .reveal{display:inline-flex;align-items:center;gap:7px;margin:2px 0 16px;padding:9px 15px;border-radius:10px;background:var(--red-deep);color:#fff;font-weight:700;font-size:.85rem;transition:.18s}
.recall .reveal:hover{background:var(--red-dark)}
.recall .ans{margin:0 0 16px;padding:13px 15px;border-left:3px solid var(--red);background:var(--bg-soft);border-radius:0 10px 10px 0;color:var(--ink)}
.recall .ans[hidden]{display:none}

/* audio */
.audio-row{display:flex;flex-direction:column;gap:14px}
.audio-row audio{width:100%}
.audio-soon{display:flex;align-items:center;gap:11px;color:var(--ink-soft);font-size:.94rem}
.audio-dl{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:.88rem;color:var(--red-text)}
.audio-dl svg{width:16px;height:16px}

/* resources */
.res-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.res-list a{display:flex;align-items:center;gap:11px;padding:12px 0;border-bottom:1px solid var(--line);font-weight:600;font-size:.95rem;transition:.15s}
.res-list a:last-child{border-bottom:none}
.res-list a:hover{color:var(--red-text);padding-left:6px}
.res-list a .ext{margin-left:auto;color:var(--ink-soft)}
.res-list a .ext svg{width:15px;height:15px}

/* repaso buttons on topic */
.repaso-cta{margin:34px 0 0;padding:22px;background:var(--bg-soft);border:1px solid var(--line-strong);border-radius:var(--radius)}
.repaso-cta b{display:block;margin-bottom:3px}
.repaso-cta .hint{font-size:.86rem;color:var(--ink-soft);margin:0 0 14px}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{padding:9px 15px;border-radius:999px;border:1px solid var(--line-strong);background:var(--surface);font-weight:700;font-size:.85rem;transition:.16s}
.chip:hover{border-color:var(--red-text);color:var(--red-text)}
.chip.active{background:var(--red-deep);color:#fff;border-color:var(--red-deep)}
.chip.clear{border-style:dashed}

.topic-nav{display:flex;justify-content:space-between;gap:14px;margin:40px 0 0}
.topic-nav a{display:inline-flex;align-items:center;gap:9px;padding:12px 18px;border-radius:12px;border:1px solid var(--line);background:var(--surface);font-weight:600;font-size:.9rem;box-shadow:var(--shadow);transition:.18s}
.topic-nav a:hover{border-color:var(--red-text);color:var(--red-text)}
.back-all{display:inline-flex;align-items:center;gap:8px;margin:8px 0 0;font-weight:700;font-size:.9rem;color:var(--red-text)}

/* ---------------------------- SEARCH ---------------------------- */
.search-overlay{position:fixed;inset:0;z-index:100;background:rgba(20,17,15,.45);backdrop-filter:blur(4px);display:none;align-items:flex-start;justify-content:center;padding:84px 18px}
.search-overlay.open{display:flex}
.search-panel{width:100%;max-width:600px;background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius);box-shadow:var(--shadow-lg);overflow:hidden;animation:pop .22s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{opacity:0;transform:translateY(-10px) scale(.98)}to{opacity:1;transform:none}}
.search-panel .field{display:flex;align-items:center;gap:11px;padding:16px 18px;border-bottom:1px solid var(--line)}
.search-panel .field svg{width:20px;height:20px;color:var(--ink-soft);flex:0 0 auto}
.search-panel input{flex:1;border:none;outline:none;background:none;color:var(--ink);font-size:1.05rem;font-family:inherit}
.search-panel input::placeholder{color:var(--ink-soft)}
.search-panel kbd{font-size:.7rem;font-weight:700;color:var(--ink-soft);border:1px solid var(--line-strong);border-radius:6px;padding:2px 7px}
.search-results{max-height:54vh;overflow:auto;padding:8px}
.search-results a{display:block;padding:12px 14px;border-radius:11px;transition:.13s}
.search-results a:hover,.search-results a.cursor{background:var(--bg-soft)}
.search-results .r-part{font-size:.7rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--red-text)}
.search-results .r-title{font-weight:600;margin:1px 0}
.search-results .r-sum{font-size:.85rem;color:var(--ink-soft);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.search-results .none{padding:26px 14px;text-align:center;color:var(--ink-soft);font-size:.92rem}

/* ---------------------------- FOOTER ---------------------------- */
.site-foot{border-top:1px solid var(--line);margin-top:30px;padding:30px 0;color:var(--ink-soft);font-size:.86rem}
.site-foot .row{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;justify-content:space-between}
.site-foot a:hover{color:var(--red-text)}
.disc{margin:14px 0 0;font-size:.78rem;line-height:1.55;max-width:80ch}

/* --------------------------- HERO PORTRAIT ---------------------- */
.hero-grid{display:flex;align-items:center;gap:40px}
.hero-copy{flex:1;min-width:0}
.hero-portrait{flex:0 0 auto;position:relative}
.hero-portrait img{width:210px;height:210px;border-radius:50%;object-fit:cover;border:5px solid var(--red);box-shadow:var(--shadow-lg)}
.hero-portrait figcaption{margin-top:12px;text-align:center;font-size:.82rem;color:var(--ink-soft);font-weight:600}
.hero-portrait figcaption b{display:block;color:var(--ink);font-size:.92rem}

/* free badge */
.free-pill{display:inline-flex;align-items:center;gap:7px;margin-top:18px;padding:8px 14px;border-radius:999px;background:color-mix(in srgb,var(--red) 9%,transparent);color:var(--red-text);font-weight:700;font-size:.82rem;border:1px solid color-mix(in srgb,var(--red) 22%,transparent)}
.free-pill svg{width:15px;height:15px}

/* ----------------------------- PROSE / LEGAL -------------------- */
.prose{padding:8px 0 70px;max-width:74ch}
.prose h1{font-size:clamp(1.8rem,4.6vw,2.5rem);letter-spacing:-.03em;line-height:1.05;margin:.2em 0 .1em}
.prose .lede{color:var(--ink-soft);font-size:1.05rem;margin:0 0 8px}
.prose h2{font-size:1.18rem;letter-spacing:-.01em;margin:30px 0 8px}
.prose p{margin:0 0 14px;color:var(--ink)}
.prose ul{margin:0 0 14px;padding-left:20px;color:var(--ink)}
.prose li{margin:0 0 8px}
.prose a{color:var(--red-text);font-weight:600}
.prose a:hover{text-decoration:underline}
.prose .note{padding:16px 18px;border-left:3px solid var(--red);background:var(--bg-soft);border-radius:0 12px 12px 0;color:var(--ink-soft);font-size:.92rem;margin:0 0 16px}
.lang-tag{font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--red-text);display:block;margin:2px 0}

/* ---------------------------- FOOTER ECOSYSTEM ------------------ */
.foot-grid{display:flex;flex-wrap:wrap;gap:26px 48px;align-items:flex-start}
.foot-brand{flex:1;min-width:220px}
.foot-brand .logo{height:36px;width:auto;margin-bottom:12px}
.foot-brand .logo.dark{display:none}
[data-theme="dark"] .foot-brand .logo.light{display:none}
[data-theme="dark"] .foot-brand .logo.dark{display:block}
.foot-col h2{margin:0 0 10px;font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink)}
.foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:7px}
.foot-col a{font-size:.88rem}
.foot-tel{font-weight:700;color:var(--ink)}
.fade-up{animation:fadeUp .5s cubic-bezier(.2,.7,.2,1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.stagger > *{animation:fadeUp .5s cubic-bezier(.2,.7,.2,1) both}
.stagger > *:nth-child(1){animation-delay:.04s}
.stagger > *:nth-child(2){animation-delay:.10s}
.stagger > *:nth-child(3){animation-delay:.16s}
.stagger > *:nth-child(4){animation-delay:.22s}
.stagger > *:nth-child(5){animation-delay:.28s}
.stagger > *:nth-child(6){animation-delay:.34s}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}}

/* --------------------------- RESPONSIVE ------------------------- */
@media (max-width:860px){
  .parts{grid-template-columns:1fr;gap:14px}
  .part-card{min-height:auto}
  .method-grid{grid-template-columns:1fr;gap:18px}
  .topic-list{grid-template-columns:1fr}
  .hero-grid{flex-direction:column-reverse;align-items:flex-start;gap:24px}
  .hero-portrait{align-self:center}
  .hero-portrait img{width:150px;height:150px}
}
@media (max-width:640px){
  .brand .study,.brand .tag-sep{display:none}
  .brand .logo{height:38px}
}
@media (max-width:560px){
  .hero{padding:38px 0 22px}
  .topic-nav{flex-direction:column}
  .topic-nav a{justify-content:center}
  .search-overlay{padding:64px 12px}
}

/* --------------------------- UTILITIES / FIXES ------------------ */
.sr-head{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.vspace{height:40px}
.empty-state h1{color:var(--ink);font-size:1.4rem;letter-spacing:-.01em;margin:0 0 8px}
.empty-state p{margin:0 0 20px}
.empty-state.nf{margin-top:60px}
.faqs .q{margin:0}
.recall .q,.recall .recall-q{cursor:default}

/* ===================== ECOSISTEMA + FAB (v2.1) ===================== */
/* Header: navegación del ecosistema */
.eco-nav{display:flex;align-items:center;gap:2px;margin-right:4px}
.eco-nav a{padding:8px 9px;border-radius:8px;font-size:.85rem;font-weight:600;color:var(--ink-soft);white-space:nowrap;transition:.15s}
.eco-nav a:hover{color:var(--red-text);background:var(--bg-soft)}
.head-tel{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 13px;border-radius:999px;font-size:.85rem;font-weight:700;color:var(--red-text);border:1.5px solid var(--line-strong);white-space:nowrap;transition:.15s}
.head-tel svg{width:16px;height:16px}
.head-tel:hover{border-color:var(--red-text)}
@media(max-width:1080px){.eco-nav{display:none}}
@media(max-width:820px){.head-tel span{display:none}.head-tel{padding:0;width:44px;justify-content:center;border-radius:11px}}
@media(max-width:560px){.head-tel{display:none}}

/* Footer: NAP (dirección, Maps, Waze) */
.foot-nap{margin-top:12px;font-size:.9rem;line-height:1.95}
.foot-nap .foot-tel{display:inline-flex;align-items:center;gap:6px;color:var(--red-text);font-weight:700}
.foot-nap .foot-tel svg{width:15px;height:15px}
.nap-addr{display:inline-flex;align-items:flex-start;gap:6px;color:var(--ink-soft)}
.nap-addr svg{width:15px;height:15px;flex:0 0 auto;margin-top:3px;color:var(--ink-soft)}
.foot-nap a:not(.foot-tel){color:var(--red-text);font-weight:600}

/* Botones flotantes */
.fab{position:fixed;right:18px;z-index:40;border:none;cursor:pointer;border-radius:999px;display:inline-flex;align-items:center;gap:9px;font-family:inherit;font-weight:700;transition:.2s;box-shadow:0 10px 26px -8px rgba(0,0,0,.45)}
.fab-wa{bottom:18px;background:#25D366;color:#073d1e;padding:0 18px;height:52px;font-size:.92rem}
.fab-wa svg{width:22px;height:22px;flex:0 0 auto}
.fab-wa:hover{transform:translateY(-2px);filter:brightness(1.04)}
.fab-top{bottom:82px;width:46px;height:46px;background:var(--red-deep);color:#fff;justify-content:center;opacity:0;pointer-events:none}
.fab-top svg{width:20px;height:20px}
.fab-top.show{opacity:1;pointer-events:auto}
.fab-top:hover{transform:translateY(-2px);background:var(--red-dark)}
@media(max-width:520px){.fab-wa .fab-txt{display:none}.fab-wa{padding:0;width:52px;justify-content:center}}
@media (prefers-reduced-motion:reduce){.fab:hover{transform:none}}

@media(max-width:640px){
  .foot-grid{gap:22px 26px}
  .foot-brand{flex:1 1 100%}
  .foot-col{flex:1 1 40%}
}

/* ===================== PÁGINA DE FUENTES ===================== */
.src-index{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 30px}
.src-chip{display:inline-flex;align-items:center;padding:7px 13px;border-radius:999px;font-size:.82rem;font-weight:600;color:var(--ink);background:var(--bg-soft);border:1px solid var(--line);transition:.15s}
.src-chip:hover{border-color:var(--red-text);color:var(--red-text)}
.src-cat{margin:0 0 30px;scroll-margin-top:86px}
.src-cat h2{font-size:1.08rem;letter-spacing:-.01em;margin:0 0 6px}
.src-note{color:var(--ink-soft);font-size:.9rem;line-height:1.6;margin:10px 0 0}

/* pilares de la guía + CTA del home */
.src-pillar{margin:0 0 34px;scroll-margin-top:86px}
.src-pillar>h2{font-size:1.18rem;letter-spacing:-.01em;margin:0 0 2px}
.src-pillar-intro{color:var(--ink-soft);font-size:.92rem;margin:0 0 14px}
.src-cat-h{font-size:.98rem;font-weight:700;margin:16px 0 2px;color:var(--ink)}
.guia-cta{margin:8px 0 0;border-radius:18px;background:linear-gradient(135deg,var(--red) 0%,#BB0007 55%,#750004 100%);color:#fff;padding:34px 30px;box-shadow:0 12px 30px rgba(187,0,7,.22)}
.guia-inner{max-width:640px}
.guia-cta .eyebrow{color:#fff;opacity:.9}
.guia-cta h2{color:#fff;font-size:1.45rem;line-height:1.2;letter-spacing:-.02em;margin:6px 0 10px}
.guia-cta p{color:#fff;opacity:.95;font-size:1rem;line-height:1.6;margin:0 0 18px}
.guia-cta p strong{color:#fff}
.guia-btn{display:inline-flex;align-items:center;gap:9px;background:#fff;color:#BB0007;font-weight:700;font-size:.98rem;padding:13px 22px;border-radius:11px;transition:.16s}
.guia-btn:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(0,0,0,.18)}
.guia-btn svg{width:17px;height:17px}
@media(max-width:640px){.guia-cta{padding:26px 20px}.guia-cta h2{font-size:1.22rem}}

/* ===================== GUÍA: PILARES + ACORDEÓN (abanico) ===================== */
.src-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between;margin:6px 0 26px}
.src-controls .src-index{margin:0;flex:1 1 auto}
.toggle-all{display:inline-flex;align-items:center;gap:7px;flex:0 0 auto;padding:8px 15px;border-radius:999px;border:1.5px solid var(--red);background:transparent;color:var(--red-text);font-weight:700;font-size:.84rem;cursor:pointer;transition:.16s}
.toggle-all:hover{background:var(--red);color:#fff}
.toggle-all svg{width:15px;height:15px;transition:transform .2s}
.toggle-all[aria-expanded="true"] svg{transform:rotate(180deg)}

.src-pillar{background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;margin:0 0 16px;box-shadow:0 1px 3px rgba(0,0,0,.04);scroll-margin-top:86px}
.pillar-head{padding:17px 22px;background:var(--bg-soft);border-left:4px solid var(--red)}
.pillar-head h2{font-size:1.12rem;letter-spacing:-.01em;margin:0;color:var(--ink)}
.src-pillar-intro{color:var(--ink-soft);font-size:.9rem;line-height:1.5;margin:5px 0 0}
.acc-wrap{padding:2px 22px 8px}

details.src-acc{border-bottom:1px solid var(--line)}
details.src-acc:last-child{border-bottom:none}
details.src-acc>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;padding:15px 0;font-weight:700;font-size:.96rem;color:var(--ink);transition:color .15s}
details.src-acc>summary::-webkit-details-marker{display:none}
details.src-acc>summary:hover{color:var(--red-text)}
.acc-t{flex:1 1 auto}
.acc-n{flex:0 0 auto;min-width:22px;height:22px;padding:0 7px;border-radius:999px;background:var(--bg-soft);border:1px solid var(--line);color:var(--ink-soft);font-size:.72rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center}
details.src-acc>summary .chev{flex:0 0 auto;width:18px;height:18px;color:var(--ink-soft);transition:transform .2s}
details.src-acc[open]>summary .chev{transform:rotate(180deg);color:var(--red-text)}
details.src-acc[open]>summary{color:var(--red-text)}
details.src-acc .res-list{padding:0 0 12px}
details.src-acc .res-list a{padding:11px 0}

/* robustez cross-browser del acordeón (fila interna) */
details.src-acc>summary{display:block;list-style:none;cursor:pointer;padding:0;gap:0}
details.src-acc>summary::-webkit-details-marker{display:none}
.acc-row{display:flex;align-items:center;gap:12px;padding:15px 0;font-weight:700;font-size:.96rem;color:var(--ink);transition:color .15s}
details.src-acc>summary:hover .acc-row{color:var(--red-text)}
details.src-acc[open]>summary .acc-row{color:var(--red-text)}
.acc-row .chev{flex:0 0 auto;width:18px;height:18px;color:var(--ink-soft);transition:transform .2s}
details.src-acc[open]>summary .acc-row .chev{transform:rotate(180deg);color:var(--red-text)}

/* ===================== RED DE SEGURIDAD DE ÍCONOS (fix chevron gigante) ===================== */
/* Todo SVG de ícono se dimensiona; las reglas específicas (más arriba) lo afinan. */
.acc-row .chev{display:inline-flex;align-items:center;flex:0 0 auto}
.acc-row .chev svg{width:18px;height:18px;display:block}
/* default seguro: cualquier ícono inline sin regla propia no se dispara a 300px */
svg:not([width]){width:1em;height:1em}