/* ==========================================================================
   Utilísimo — hoja de estilos
   ========================================================================== */

:root{
  color-scheme:light dark;
  --bg:#f5f7fb; --surface:#ffffff; --surface-2:#f1f5f9;
  --text:#0f172a; --text-2:#334155; --muted:#556074;
  --border:#e2e8f0; --border-2:#cbd5e1;
  --btn:#2563eb; --btn-h:#1d4ed8; --link:#1d4ed8; --ring:rgba(37,99,235,.22); --focus:#2563eb;
  --primary-soft:#eef4ff; --primary-line:#c7dafd; --primary-ink:#1e3a8a;
  --ok:#15803d; --bad:#b91c1c;
  --header-bg:rgba(255,255,255,.88);
  --hero-glow:rgba(37,99,235,.10);
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 1px 3px rgba(15,23,42,.06),0 10px 28px -14px rgba(15,23,42,.14);
  --shadow-lg:0 18px 40px -18px rgba(15,23,42,.35);
  --t-calc-bg:#e6efff; --t-calc:#1d4ed8;
  --t-util-bg:#daf5ee; --t-util:#0f766e;
  --t-fun-bg:#eee7ff;  --t-fun:#6d28d9;
  --tile-correct:#15803d; --tile-present:#b45309; --tile-absent:#64748b;
  --brand:#ffc93c; --brand-h:#f5b700; --brand-ink:#131722; --eyebrow-ink:#6b4e00;
  --r:14px; --r-sm:10px;
  --chev:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0b1120; --surface:#111a2e; --surface-2:#172136;
    --text:#e8edf6; --text-2:#c3cee0; --muted:#9aa8bf;
    --border:#243049; --border-2:#33425f;
    --btn:#3a6df0; --btn-h:#5580f3; --link:#93b4ff; --ring:rgba(120,160,255,.28); --focus:#93b4ff;
    --primary-soft:rgba(88,132,255,.14); --primary-line:rgba(120,160,255,.30); --primary-ink:#c4d6ff;
    --ok:#4ade80; --bad:#f87171;
    --header-bg:rgba(11,17,32,.85);
    --hero-glow:rgba(88,132,255,.16);
    --eyebrow-ink:#ffd970;
    --shadow-sm:none;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 28px -14px rgba(0,0,0,.6);
    --shadow-lg:0 18px 40px -18px rgba(0,0,0,.7);
    --t-calc-bg:rgba(88,132,255,.18); --t-calc:#a9c2ff;
    --t-util-bg:rgba(45,212,191,.16); --t-util:#5eead4;
    --t-fun-bg:rgba(167,139,250,.18); --t-fun:#c4b5fd;
    --tile-absent:#3b465c;
  }
}

/* Base ---------------------------------------------------------------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--text);
  font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
main{flex:1 0 auto;width:100%}
img,svg{max-width:100%}
h1,h2,h3{line-height:1.2}
a{color:var(--link);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:8px}
.skip:focus{left:12px;background:var(--brand);color:var(--brand-ink);padding:10px 14px;border-radius:8px;z-index:100}
[hidden]{display:none!important}

/* Iconos -------------------------------------------------------------- */
.i{width:1.25em;height:1.25em;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.2em}
.ic{flex:none;width:46px;height:46px;border-radius:12px;display:grid;place-items:center}
.ic .i{width:24px;height:24px;vertical-align:0}
.ic.lg{width:56px;height:56px;border-radius:15px}
.ic.lg .i{width:28px;height:28px}
.ic-calc{background:var(--t-calc-bg);color:var(--t-calc)}
.ic-util{background:var(--t-util-bg);color:var(--t-util)}
.ic-fun{background:var(--t-fun-bg);color:var(--t-fun)}

/* Cabecera ------------------------------------------------------------ */
.site-header{position:sticky;top:0;z-index:50;background:var(--header-bg);
  -webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border)}
.hbar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:800;font-size:1.25rem;letter-spacing:-.025em}
.brand img{display:block;height:44px;width:auto}
.nav{display:flex;align-items:center;gap:2px}
.nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem;padding:8px 13px;border-radius:9px}
.nav a:hover{color:var(--text);background:var(--surface-2)}
.nav a[aria-current]{color:var(--link);background:var(--primary-soft)}
.nav .nav-cta{margin-left:8px;background:var(--brand);color:var(--brand-ink);font-weight:700}
.nav a.nav-cta:hover{background:var(--brand-h);color:var(--brand-ink)}
.menu-btn{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--border-2);border-radius:10px;background:var(--surface);color:var(--text);cursor:pointer}
.menu-btn .i{width:22px;height:22px;vertical-align:0}
@media (max-width:820px){
  .menu-btn{display:inline-flex}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--surface);border-bottom:1px solid var(--border);padding:10px 16px 16px;box-shadow:var(--shadow-lg)}
  .nav.open{display:flex}
  .nav a{padding:13px 12px;font-size:1rem}
  .nav .nav-cta{margin:8px 0 0;text-align:center}
}

/* Portada ------------------------------------------------------------- */
.hero{padding:68px 0 44px;background:radial-gradient(520px 260px at 96% 0%,rgba(255,201,60,.20),transparent 70%),radial-gradient(900px 340px at 12% -8%,var(--hero-glow),transparent 65%),var(--bg);border-bottom:1px solid var(--border)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 20px;padding:6px 14px;border-radius:999px;font-size:.84rem;font-weight:650;
  color:var(--eyebrow-ink);background:rgba(255,201,60,.22);border:1px solid rgba(219,165,0,.45)}
.hero h1{font-size:clamp(2.1rem,5.4vw,3.6rem);line-height:1.07;letter-spacing:-.038em;font-weight:800;margin:0 0 18px;max-width:19ch}
.hero-sub{font-size:1.15rem;color:var(--muted);max-width:56ch;margin:0 0 30px}
.search{position:relative;max-width:600px}
.search .i{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none;width:22px;height:22px;vertical-align:0}
.search input[type=search]{width:100%;height:58px;font:inherit;font-size:1.05rem;padding:0 18px 0 52px;border:1px solid var(--border-2);border-radius:15px;background:var(--surface);color:var(--text);box-shadow:var(--shadow)}
.search input[type=search]:focus{border-color:var(--btn);box-shadow:0 0 0 4px var(--ring)}
.search input::placeholder{color:var(--muted)}
.chips{list-style:none;margin:28px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:10px 26px;color:var(--muted);font-size:.93rem;font-weight:550}
.chips li{display:inline-flex;align-items:center;gap:8px}
.chips .i{color:var(--ok)}

.feature{display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;margin:36px 0 0;padding:26px 30px;border-radius:20px;
  text-decoration:none;color:#fff;background:linear-gradient(120deg,#0f172a 0%,#1e3a8a 100%);box-shadow:var(--shadow-lg)}
.feature .tiles{display:flex;gap:6px}
.feature .tiles i{width:42px;height:42px;display:grid;place-items:center;font-style:normal;font-weight:800;font-size:1.1rem;border-radius:9px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22)}
.feature .tiles i.g{background:#15803d;border-color:#15803d}
.feature .tiles i.y{background:#b45309;border-color:#b45309}
.feature .kick{display:block;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);margin-bottom:4px}
.feature h2{margin:0 0 4px;font-size:1.45rem;letter-spacing:-.02em}
.feature p{margin:0;color:#cbd5e1}
.feature .go{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:var(--brand-ink);font-weight:700;padding:12px 20px;border-radius:11px;white-space:nowrap}
.feature .go .i{transition:transform .15s}
.feature:hover .go .i{transform:translateX(3px)}
@media (max-width:820px){.feature{grid-template-columns:1fr;gap:16px;padding:22px}.feature .go{justify-self:start}}

/* Secciones y tarjetas ------------------------------------------------ */
section.block{padding:44px 0 0}
section.block>h2,.side>h2{font-size:1.5rem;letter-spacing:-.02em;margin:0 0 16px}
.sec-head{display:flex;align-items:center;gap:14px;margin:0 0 22px}
.sec-head h2{margin:0;font-size:1.55rem;letter-spacing:-.025em}
.sec-head .sub{margin:2px 0 0;color:var(--muted)}
.cat{scroll-margin-top:84px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px}
.tool{display:flex;align-items:flex-start;gap:14px;padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);
  color:var(--text);text-decoration:none;box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s,border-color .15s}
.tool:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--primary-line)}
.tool .tt{flex:1;min-width:0}
.tool h3{margin:1px 0 4px;font-size:1.04rem;letter-spacing:-.01em}
.tool p{margin:0;color:var(--muted);font-size:.9rem;line-height:1.45}
.tool .go{align-self:center;width:18px;height:18px;color:var(--muted);opacity:.55;transition:transform .15s,opacity .15s}
.tool:hover .go{transform:translateX(3px);opacity:1;color:var(--link)}
.empty{color:var(--muted);padding:28px 0 0;text-align:center}

.fact{display:flex;align-items:flex-start;gap:18px;padding:22px 24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-sm);color:var(--text);text-decoration:none}
.fact:hover{border-color:var(--primary-line);box-shadow:var(--shadow)}
.fact .kicker,.kicker{display:block;font-size:.78rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.fact strong{display:block;font-size:1.12rem;line-height:1.45;font-weight:650}
.fact .more{display:inline-flex;align-items:center;gap:6px;margin-top:10px;color:var(--link);font-weight:650;font-size:.92rem}

/* Páginas de herramienta --------------------------------------------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:.88rem;color:var(--muted);padding:26px 0 0}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--link);text-decoration:underline}
.crumbs .i{width:14px;height:14px;vertical-align:0;opacity:.7}
.crumbs [aria-current]{color:var(--text);font-weight:600}
.page-head{display:flex;align-items:flex-start;gap:18px;margin:18px 0 30px}
.page-title{font-size:clamp(1.75rem,4.2vw,2.5rem);letter-spacing:-.03em;line-height:1.12;margin:2px 0 8px;font-weight:800}
.lead{color:var(--muted);font-size:1.08rem;max-width:64ch;margin:0}

.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:44px;padding-bottom:8px}
.content{min-width:0}
.content>*+*{margin-top:24px}
.content>.prose,.content>.faq{margin-top:44px}
.content>.sharebar{margin-top:16px}
@media (min-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr) 300px;gap:44px}
  .side{position:sticky;top:88px;align-self:start}
  .side>h2{font-size:1.05rem;margin-bottom:12px}
  .side .grid{grid-template-columns:1fr;gap:10px}
  .side .tool{padding:12px 14px;align-items:center;gap:12px}
  .side .ic{width:38px;height:38px;border-radius:10px}
  .side .ic .i{width:20px;height:20px}
  .side .tool h3{margin:0;font-size:.95rem}
  .side .tool p,.side .tool .go{display:none}
}
@media (max-width:1023px){.side{padding-top:8px;border-top:1px solid var(--border)}.side>h2{margin-top:32px}}

.panel{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:26px;box-shadow:var(--shadow)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.mini{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px;box-shadow:var(--shadow-sm)}
.mini h2,.panel h2{font-size:1.05rem;margin:0 0 14px;letter-spacing:-.01em}
@media (max-width:560px){.panel{padding:18px;border-radius:16px}}

/* Formularios --------------------------------------------------------- */
label{display:block;font-weight:600;font-size:.9rem;margin:0 0 6px;color:var(--text)}
.field{margin-bottom:16px}
.field:last-child{margin-bottom:0}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row>span{color:var(--muted);font-weight:600}
input[type=number],input[type=text],input[type=date],input[type=search],select,textarea{
  width:100%;font:inherit;font-size:1rem;min-height:46px;padding:10px 13px;border:1px solid var(--border-2);border-radius:var(--r-sm);background:var(--surface);color:var(--text);
  transition:border-color .12s,box-shadow .12s}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:.85}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--btn);box-shadow:0 0 0 4px var(--ring)}
select{appearance:none;-webkit-appearance:none;padding-right:38px;cursor:pointer;
  background-image:var(--chev);background-repeat:no-repeat;background-position:right 12px center;background-size:16px}
.row input,.row select{flex:1;min-width:110px;width:auto}
textarea{min-height:170px;resize:vertical;line-height:1.55}
input[type=range]{width:100%;accent-color:var(--btn);height:28px}
input[type=checkbox]{width:20px;height:20px;accent-color:var(--btn);flex:none}
.checks{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;margin-top:8px}
.check{display:flex;gap:12px;align-items:center;font-weight:550;margin:0;padding:11px 14px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--surface);cursor:pointer}
.check:hover{background:var(--surface-2)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:650;font-size:1rem;min-height:46px;padding:0 20px;
  background:var(--btn);color:#fff;border:1px solid transparent;border-radius:var(--r-sm);cursor:pointer;text-decoration:none;
  transition:background .12s,transform .06s,border-color .12s}
.btn:hover{background:var(--btn-h)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.ghost{background:var(--surface);color:var(--text);border-color:var(--border-2)}
.btn.ghost:hover{background:var(--surface-2)}
.btn.small{min-height:40px;padding:0 14px;font-size:.92rem}
.btn.icon-btn{padding:0;width:46px;flex:none}
.btn.done{background:var(--ok);border-color:transparent;color:#fff}
.btn.ghost.done{background:var(--ok);color:#fff}

/* Resultados ---------------------------------------------------------- */
.result{margin-top:16px;padding:16px 18px;background:var(--primary-soft);border:1px solid var(--primary-line);border-radius:12px;font-size:1.05rem;min-height:56px}
.result b,.result .num{font-size:1.6rem;letter-spacing:-.02em;color:var(--primary-ink);line-height:1.3}
.result small{color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-top:16px}
.stat{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:13px 15px}
.stat small{display:block;color:var(--muted);font-weight:600;font-size:.82rem;margin-bottom:2px}
.stat b{font-size:1.3rem;letter-spacing:-.02em;line-height:1.3}
.err{color:var(--bad);font-weight:600}
.note{font-size:.88rem;color:var(--muted);margin:14px 0 0}
.copyrow{display:flex;gap:12px;align-items:center;justify-content:space-between;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--r-sm);padding:10px 12px 10px 14px;margin-bottom:8px}
.copyrow>span{font-size:1.08rem;overflow-wrap:anywhere;min-width:0}
.copyrow.mono>span{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.copytxt{display:flex;flex-direction:column;min-width:0}
.copytxt small{color:var(--muted);font-size:.78rem;font-weight:650;margin-bottom:1px}
.copytxt span{font-size:1.1rem;overflow-wrap:anywhere}
.pwbox{padding:14px 14px 14px 16px;margin-bottom:0}
.pw{font:600 1.35rem/1.35 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow-wrap:anywhere;min-width:0}
.meter{height:8px;background:var(--surface-2);border:1px solid var(--border);border-radius:5px;overflow:hidden;margin:14px 0 6px}
.meter i{display:block;height:100%;width:0;background:var(--bad);transition:width .2s,background .2s}
.big-out{font-size:clamp(1.6rem,5vw,2.3rem);font-weight:800;letter-spacing:-.03em;overflow-wrap:anywhere;color:var(--text)}
.big-out .i{width:.85em;height:.85em;vertical-align:-.08em;color:var(--link)}

/* IMC */
.bar{height:12px;border-radius:6px;background:linear-gradient(90deg,#3b82f6 0 14%,#16a34a 14% 40%,#f59e0b 40% 60%,#dc2626 60% 100%);position:relative;margin:26px 0 12px}
.bar i{position:absolute;top:-6px;width:4px;height:24px;background:var(--text);border:2px solid var(--surface);border-radius:4px;box-sizing:content-box;transform:translateX(-50%);transition:left .3s}
.legend{display:flex;flex-wrap:wrap;gap:6px 20px;font-size:.84rem;color:var(--muted);margin-bottom:6px}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend .dot{width:10px;height:10px;border-radius:50%;flex:none}

/* Tablas y detalles */
table{border-collapse:collapse;width:100%;font-size:.92rem;font-variant-numeric:tabular-nums}
th,td{padding:9px 12px;text-align:right;border-bottom:1px solid var(--border)}
th{position:sticky;top:0;background:var(--surface-2);font-weight:650;color:var(--muted);font-size:.82rem}
th:first-child,td:first-child{text-align:left}
tbody tr:nth-child(even) td,tr:nth-child(even) td{background:transparent}
.tscroll{overflow:auto;max-height:360px;border:1px solid var(--border);border-radius:var(--r-sm);margin-top:12px}
details{margin-top:18px}
details>summary{cursor:pointer;font-weight:650;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px}
details>summary::-webkit-details-marker{display:none}
details>summary::after{content:"";flex:none;width:18px;height:18px;background:currentColor;opacity:.6;-webkit-mask:var(--chev) center/contain no-repeat;mask:var(--chev) center/contain no-repeat;transition:transform .2s}
details[open]>summary::after{transform:rotate(180deg)}

/* Pestañas */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.tabs button{font:inherit;font-weight:600;font-size:.93rem;border:1px solid var(--border-2);background:var(--surface);color:var(--text);border-radius:999px;padding:8px 16px;cursor:pointer;transition:background .12s}
.tabs button:hover{background:var(--surface-2)}
.tabs button[aria-pressed=true]{background:var(--btn);border-color:var(--btn);color:#fff}

/* Conversor */
.conv-row{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:end;margin-bottom:0}
.conv-row .icon-btn{margin-bottom:16px}
.conv-row .field{margin-bottom:16px}
@media (max-width:560px){.conv-row{grid-template-columns:1fr}.conv-row .icon-btn{width:100%;margin:0 0 16px;order:2}.conv-row .field:last-child{order:3}}
.eq-list{margin-top:12px;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.eq{display:flex;flex-direction:column;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--r-sm);padding:10px 13px}
.eq span{color:var(--muted);font-size:.8rem;font-weight:600}
.eq b{font-size:1.05rem;overflow-wrap:anywhere}

/* Dato del día */
.fact-text{font-size:clamp(1.25rem,3.6vw,1.75rem);line-height:1.4;font-weight:700;letter-spacing:-.015em;margin:4px 0 22px}
.hist{padding:16px 0;border-bottom:1px solid var(--border)}
.hist:last-child{border-bottom:0}
.hist small{display:block;color:var(--muted);font-weight:650;font-size:.82rem;margin-bottom:3px;text-transform:capitalize}
.hist p{margin:0}

/* Contenido editorial ------------------------------------------------- */
.prose h2,.faq h2{font-size:1.4rem;letter-spacing:-.02em;margin:34px 0 10px}
.prose>h2:first-child,.faq>h2:first-child{margin-top:0}
.prose p,.prose li{color:var(--text-2)}
.prose ul{padding-left:22px}
.prose li{margin:5px 0}
.doc{max-width:760px;padding-bottom:16px}
.doc .meta{color:var(--muted);font-size:.9rem;margin:0 0 20px}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:0;margin:0 0 10px;box-shadow:var(--shadow-sm)}
.faq summary{padding:16px 18px}
.faq details[open]{border-color:var(--primary-line)}
.faq details p{margin:0;padding:0 18px 16px;color:var(--text-2)}
.sharebar{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.ad-slot{margin:32px 0;text-align:center;min-height:100px}
.ad-slot::before{content:"Publicidad";display:block;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}

.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin:28px 0 8px}
.feat{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px;box-shadow:var(--shadow-sm)}
.feat h3{margin:14px 0 4px;font-size:1.02rem}
.feat p{margin:0;font-size:.92rem;color:var(--muted)}
.contact-card{display:flex;align-items:center;gap:16px;padding:20px 22px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);text-decoration:none;color:var(--text);max-width:520px}
.contact-card:hover{border-color:var(--primary-line)}
.contact-card small{display:block;color:var(--muted);font-weight:600;font-size:.82rem}
.contact-card strong{font-size:1.1rem;overflow-wrap:anywhere}
.notfound{text-align:center;padding:72px 0 40px}
.nf-logo{display:block;margin:0 auto 18px}
.notfound .code{font-size:clamp(4.5rem,18vw,8rem);font-weight:800;letter-spacing:-.05em;line-height:1;color:var(--text);margin:0}
.notfound h1{font-size:clamp(1.5rem,4vw,2rem);margin:10px 0 8px;letter-spacing:-.02em}
.notfound p{color:var(--muted);margin:0 0 26px}

/* Juego ---------------------------------------------------------------- */
.game{max-width:440px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:18px 16px 20px;box-shadow:var(--shadow)}
.toast{min-height:36px;display:flex;align-items:center;justify-content:center;font-weight:650;text-align:center}
.board{display:grid;grid-template-rows:repeat(6,1fr);gap:6px;margin:6px auto 18px;width:min(100%,320px)}
.brow{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.tile{aspect-ratio:1;border:2px solid var(--border-2);border-radius:8px;display:grid;place-items:center;font-size:clamp(1.5rem,7vw,2rem);font-weight:800;text-transform:uppercase;background:var(--surface);color:var(--text)}
.tile.filled{border-color:var(--text)}
.tile.correct{background:var(--tile-correct);border-color:var(--tile-correct);color:#fff}
.tile.present{background:var(--tile-present);border-color:var(--tile-present);color:#fff}
.tile.absent{background:var(--tile-absent);border-color:var(--tile-absent);color:#fff}
@media (prefers-reduced-motion:no-preference){
  .tile.pop{animation:pop .1s}
  .tile.flip{animation:flip .45s both}
  .brow.shake{animation:shake .4s}
}
@keyframes pop{50%{transform:scale(1.08)}}
@keyframes flip{0%{transform:rotateX(0)}50%{transform:rotateX(90deg)}100%{transform:rotateX(0)}}
@keyframes shake{20%,60%{transform:translateX(-6px)}40%,80%{transform:translateX(6px)}}
.kb{display:flex;flex-direction:column;gap:6px}
.kbrow{display:flex;gap:5px;justify-content:center}
.key{flex:1;max-width:44px;height:54px;border:0;border-radius:8px;background:var(--surface-2);color:var(--text);font-weight:700;font-size:.95rem;font-family:inherit;text-transform:uppercase;cursor:pointer;padding:0;display:grid;place-items:center;border-bottom:2px solid var(--border-2)}
.key:hover{background:var(--border)}
.key .i{width:20px;height:20px;vertical-align:0}
.key.wide{flex:1.6;max-width:76px;font-size:.7rem;letter-spacing:.02em}
.key.correct{background:var(--tile-correct);color:#fff;border-color:transparent}
.key.present{background:var(--tile-present);color:#fff;border-color:transparent}
.key.absent{background:var(--tile-absent);color:#fff;border-color:transparent}
.endbox{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--r);padding:18px;margin-top:18px;text-align:center}
.dist{display:grid;grid-template-columns:20px 1fr;gap:4px 8px;align-items:center;text-align:left;margin-top:14px}
.dist i{display:block;background:var(--tile-absent);color:#fff;font-style:normal;padding:0 7px;min-width:24px;text-align:right;border-radius:4px;font-weight:700;font-size:.85rem}
.dist i.hl{background:var(--tile-correct)}
.game .note{text-align:center}

/* Pie de página ------------------------------------------------------- */
.site-footer{margin-top:72px;border-top:4px solid var(--brand);background:#0b1220;color:#94a3b8;padding:56px 0 30px;font-size:.93rem}
.site-footer a{color:#cbd5e1;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer .brand{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:36px 32px}
.foot-brand p{margin:14px 0 0;max-width:34ch;line-height:1.6}
.foot-grid h2{font-size:.78rem;letter-spacing:.09em;text-transform:uppercase;color:#e2e8f0;margin:0 0 14px;font-weight:700}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.foot-bottom{margin-top:44px;padding-top:22px;border-top:1px solid #1e293b;display:flex;gap:8px 32px;flex-wrap:wrap;justify-content:space-between;font-size:.86rem}
.foot-bottom p{margin:0}
@media (max-width:980px){.foot-grid{grid-template-columns:repeat(2,1fr)}.foot-brand{grid-column:1/-1}}
@media (max-width:480px){.foot-grid{grid-template-columns:1fr 1fr;gap:30px 20px}}

::selection{background:var(--brand);color:var(--brand-ink)}
@media (max-width:480px){.brand img{height:36px}}

/* Composición decorativa del hero (portada) */
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:40px;align-items:center}
.hero-art{position:relative;height:340px}
.hero-art .big{position:absolute;right:26px;top:14px;width:214px;height:auto;transform:rotate(6deg);filter:drop-shadow(0 22px 28px rgba(15,23,42,.28))}
.ha-card{position:absolute;display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg)}
.ha-card small{display:block;color:var(--muted);font-size:.74rem;font-weight:600;line-height:1.2}
.ha-card b{display:block;font-size:1.35rem;letter-spacing:-.02em;line-height:1.2}
.ha-a{left:-6px;top:38px}
.ha-b{left:34px;bottom:14px;gap:5px;padding:12px}
.ha-b i{width:32px;height:32px;display:grid;place-items:center;font-style:normal;font-weight:800;font-size:.95rem;border-radius:7px;color:#fff;background:var(--tile-absent)}
.ha-b i.g{background:var(--tile-correct)}
.ha-b i.y{background:var(--tile-present)}
.ha-c{right:0;bottom:38px;flex-direction:column;align-items:flex-start;gap:6px}
@media (prefers-reduced-motion:no-preference){
  .hero-art .big{animation:floaty 7s ease-in-out infinite}
  .ha-a{animation:floaty 6s ease-in-out -2s infinite}
  .ha-b{animation:floaty 8s ease-in-out -4s infinite}
  .ha-c{animation:floaty 7s ease-in-out -1s infinite}
}
@keyframes floaty{50%{transform:translateY(-9px)}}
.hero-art .big{--r:6deg}
@media (max-width:1000px){.hero-grid{grid-template-columns:1fr}.hero-art{display:none}}
.ha-c .badge{display:inline-flex;padding:3px 12px;border-radius:999px;font-size:.8rem;font-weight:700;background:rgba(22,163,74,.14);color:#15803d;border:1px solid rgba(22,163,74,.35)}
@media (prefers-color-scheme:dark){.ha-c .badge{color:#6ee7a0}}

/* Enlaces a conversiones de monedas (portada y páginas de monedas) */
.pair-group h3{font-size:.95rem;margin:22px 0 10px;color:var(--muted);letter-spacing:-.005em}
.pair-links{display:flex;flex-wrap:wrap;gap:8px}
.pair-links a{display:inline-block;padding:7px 14px;border:1px solid var(--border-2);border-radius:999px;background:var(--surface);color:var(--text);text-decoration:none;font-size:.9rem;font-weight:600;transition:border-color .12s,color .12s,background .12s}
.pair-links a:hover{border-color:var(--btn);color:var(--link);background:var(--primary-soft)}
section.block>.sub{color:var(--muted);margin:-8px 0 16px}
.prose h3{font-size:1.1rem;letter-spacing:-.01em;margin:24px 0 6px}