/* Mathvsmyth.com — sitio oficial v1 */
:root{
  --paper:#faf6ee; --paper2:#fffdf8; --ink:#182234; --muted:#5b6474;
  --accent:#c2570b; --accent-d:#a84a09; --teal:#0e7c6b; --line:#e8e0cd;
  --navy:#0f1830; --navy2:#22345e; --gold:#e8b04b;
  --ok:#15803d; --warn:#b45309; --bad:#b91c1c;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--paper);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:1100px;margin:0 auto;padding:0 24px}
img,svg{max-width:100%}
a{color:var(--accent)}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:50;background:rgba(250,246,238,.95);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:20px;padding:13px 0}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);
  font-family:Georgia,"Times New Roman",serif;font-weight:bold;font-size:22px;white-space:nowrap;margin-right:auto}
.brand em{font-style:normal;color:var(--accent)}
.brand svg{width:28px;height:28px;flex:none}
nav.links{display:flex;align-items:center;gap:4px}
nav.links a{text-decoration:none;color:var(--ink);font-size:15px;font-weight:500;
  padding:8px 13px;border-radius:999px}
nav.links a:hover{background:#f1ead9;color:var(--accent)}
nav.links a.active{background:var(--navy);color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;
  padding:8px 12px;font-size:18px;cursor:pointer;color:var(--ink);line-height:1}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:13px 28px;border-radius:999px;text-decoration:none;
  font-weight:700;font-size:16px;border:none;cursor:pointer;font-family:inherit;line-height:1.3}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-d)}
.btn.ghost{border:1px solid #8a93a8;color:#f5efe2;background:transparent}
.btn.ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn.dark{background:var(--navy);color:#fff}
.btn.dark:hover{background:var(--navy2)}
.btn.small{padding:9px 20px;font-size:14.5px}
.btns{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- hero ---------- */
.hero{background:radial-gradient(1100px 560px at 82% -10%,var(--navy2) 0%,var(--navy) 58%);
  color:#f5efe2;padding:84px 0 72px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(600px 300px at 12% 110%,rgba(194,87,11,.25),transparent 70%)}
.hero .wrap{position:relative;z-index:1}
.eyebrow{text-transform:uppercase;letter-spacing:3px;font-size:12px;color:var(--gold);font-weight:700}
.hero h1{font-family:Georgia,serif;font-size:clamp(36px,5.4vw,60px);line-height:1.08;
  margin:18px 0 18px;max-width:800px}
.hero h1 .vs{color:var(--gold);font-style:italic}
.lead{font-size:19px;max-width:680px;color:#d9d2c2}
.hero.slim{padding:60px 0 52px}

/* ---------- sections ---------- */
section.block{padding:68px 0}
.band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2.sec{font-family:Georgia,serif;font-size:clamp(27px,4vw,38px);line-height:1.15;margin:12px 0 16px}
h2.sub,h3.sub{font-family:Georgia,serif;font-size:23px;margin:38px 0 12px}
.cathead{display:block;max-width:340px;width:100%;height:auto;margin:18px 0 6px;border-radius:16px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.prose{max-width:760px;font-size:17px;color:#2a3448}
.prose p+p{margin-top:14px}
.prose strong{color:var(--ink)}
.center{text-align:center}
.center .prose{margin:0 auto}

/* ---------- cards & grids ---------- */
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:32px}
.grid4{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:32px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.band .card{background:var(--paper2)}
.card .step{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border-radius:50%;background:var(--navy);color:var(--gold);font-weight:800;font-size:17px}
.card h3{font-size:20px;margin:14px 0 8px;font-family:Georgia,serif}
.card p{color:var(--muted);font-size:15.5px}
.card .count{font-size:13px;color:var(--accent);font-weight:700;margin-top:10px}
.card.lift{transition:transform .18s ease,box-shadow .18s ease}
.card.lift:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(24,34,52,.10)}
.note{margin-top:24px;font-size:14.5px;color:var(--muted);max-width:760px}
.note strong{color:var(--ink)}
.quote{font-family:Georgia,serif;font-size:clamp(20px,3vw,27px);line-height:1.45;
  border-left:4px solid var(--accent);padding:6px 0 6px 22px;margin:36px 0;color:var(--ink);max-width:760px}

/* ---------- stats strip ---------- */
.stats{display:flex;gap:0;flex-wrap:wrap;margin-top:36px;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;background:#fff}
.stat{flex:1 1 160px;padding:22px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat .num{font-family:Georgia,serif;font-size:32px;font-weight:bold;color:var(--navy)}
.stat .num em{font-style:normal;color:var(--accent)}
.stat .lbl{font-size:13.5px;color:var(--muted);margin-top:4px}

/* ---------- feed / publications ---------- */
.feeditem{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px 26px;margin-top:16px}
.feeditem h3{font-family:Georgia,serif;font-size:22px;margin:10px 0 6px}
.feeditem h3 a{color:var(--ink);text-decoration:none}
.feeditem h3 a:hover{color:var(--accent)}
.meta{font-size:13.5px;color:var(--muted)}
.hash{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12.5px;color:#6b7280;
  word-break:break-all;background:#f4f1e8;border-radius:6px;padding:6px 10px;margin-top:10px;display:inline-block}
.badge{display:inline-block;font-size:12px;font-weight:700;text-transform:uppercase;
  letter-spacing:1px;border-radius:999px;padding:4px 12px}
.badge.verdad{background:#dcfce7;color:var(--ok)}
.badge.mito{background:#fef3c7;color:var(--warn)}
.badge.pregunta{background:#e0f2fe;color:#0369a1}
.badge.ejemplo{background:#ede9fe;color:#6d28d9}
.validbar{height:8px;background:#f1ead9;border-radius:999px;margin-top:12px;overflow:hidden;max-width:420px}
.validbar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--teal),var(--ok))}
.validbar.low i{background:linear-gradient(90deg,var(--warn),var(--bad))}
.validlbl{font-size:13px;color:var(--muted);margin-top:6px}

/* ---------- forms ---------- */
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;max-width:760px;margin-top:28px}
.field{margin-bottom:22px}
.field label{display:block;font-weight:600;font-size:15px;margin-bottom:7px}
.field input[type=text],.field input[type=email],.field textarea,.field select{
  width:100%;border:1px solid var(--line);border-radius:10px;padding:12px 14px;
  font-size:16px;font-family:inherit;background:var(--paper2);color:var(--ink)}
.field textarea{min-height:130px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.field .hint{font-size:13.5px;color:var(--muted);margin-top:6px}
.radio-row{display:flex;gap:20px;flex-wrap:wrap;margin-top:8px}
.radio-row label{font-weight:400;display:flex;gap:8px;align-items:center;font-size:15.5px;cursor:pointer}
.checkline{display:flex;gap:12px;align-items:flex-start;background:#fff8ef;border:1px dashed var(--accent);
  border-radius:12px;padding:16px 18px;font-size:15px;cursor:pointer}
.checkline input{margin-top:4px;transform:scale(1.25);accent-color:var(--accent)}
.alert{border-radius:12px;padding:15px 19px;margin-top:20px;font-size:15px;display:none}
.alert.show{display:block}
.alert.err{background:#fef2f2;border:1px solid #fecaca;color:#991b1b}
.alert.ok{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534}
.alert.info{background:#eff6ff;border:1px solid #bfdbfe;color:#1e40af}

/* ---------- tables ---------- */
table.plain{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);
  border-radius:12px;overflow:hidden;font-size:15.5px;margin-top:24px}
table.plain th,table.plain td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
table.plain th{background:#f4f1e8;font-size:13px;text-transform:uppercase;letter-spacing:1px}
table.plain tr:last-child td{border-bottom:none}

/* ---------- steps timeline ---------- */
.steps{counter-reset:paso;margin-top:30px;display:grid;gap:16px}
.paso{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px 24px 84px;position:relative}
.paso::before{counter-increment:paso;content:counter(paso);position:absolute;left:24px;top:24px;
  width:42px;height:42px;border-radius:50%;background:var(--navy);color:var(--gold);
  font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center}
.paso h3{font-family:Georgia,serif;font-size:20px;margin-bottom:6px}
.paso p{color:var(--muted);font-size:15.5px}

/* ---------- footer ---------- */
footer.site{padding:52px 0 40px;font-size:14.5px;color:var(--muted);border-top:1px solid var(--line);background:#fff}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:28px}
.foot-grid .brand{margin-bottom:10px}
.foot-grid h4{font-size:13px;text-transform:uppercase;letter-spacing:2px;color:var(--ink);margin-bottom:12px}
.foot-grid nav a{display:block;color:var(--muted);text-decoration:none;padding:4px 0;font-size:14.5px}
.foot-grid nav a:hover{color:var(--accent)}
.origin{border:1px dashed var(--accent);border-radius:12px;padding:18px 20px;margin-top:6px;background:#fff8ef}
.origin p{font-size:13.5px;color:#4a5468}
.fine{margin-top:22px;font-size:12.5px;color:#a39c88;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ---------- misc ---------- */
.pill{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.5px;border-radius:999px;
  padding:5px 14px;background:#fef3c7;color:var(--warn);text-transform:uppercase}
.kicker-list{margin-top:18px;display:grid;gap:10px}
.kicker-list li{list-style:none;display:flex;gap:12px;align-items:flex-start;font-size:16px}
.kicker-list .tick{flex:none;width:26px;height:26px;border-radius:50%;background:#dcfce7;color:var(--ok);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px}
.kicker-list .cross{background:#fef2f2;color:var(--bad)}
.hero-art{position:absolute;right:-40px;top:50%;transform:translateY(-50%);opacity:.16;pointer-events:none}

@media(max-width:860px){
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  nav.links{position:fixed;inset:0 0 0 30%;background:var(--navy);flex-direction:column;
    align-items:flex-start;justify-content:flex-start;padding:90px 32px;gap:6px;
    transform:translateX(100%);transition:transform .25s ease;z-index:60}
  nav.links.open{transform:none;box-shadow:-20px 0 60px rgba(0,0,0,.3)}
  nav.links a{color:#f5efe2;font-size:19px;padding:12px 0;width:100%}
  nav.links a.active{background:none;color:var(--gold)}
  .menu-btn{display:block;margin-left:8px}
  .nav .btn.small{margin-left:auto}
  .hero{padding:60px 0 52px}
  section.block{padding:52px 0}
  .foot-grid{grid-template-columns:1fr}
  .form{padding:24px 20px}
}

/* v2: logo oficial + conmutador de idioma + QR */
.brand .logo{height:36px;width:auto;border-radius:8px;vertical-align:middle}
.lang{font-weight:800;font-size:13px;letter-spacing:.06em;border:1px solid var(--line);border-radius:8px;padding:4px 8px}
.qrbox{display:flex;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-top:22px}
.qrbox img{flex:0 0 auto;border-radius:8px}
.qrbox p{margin:0;font-size:15px}
@media(max-width:640px){.qrbox{flex-direction:column;text-align:center}}

/* v3: accesibilidad — skip link, foco visible, movimiento reducido */
.skip{position:absolute;left:16px;top:-60px;z-index:100;background:var(--navy);color:#fff;
  padding:12px 20px;border-radius:10px;text-decoration:none;font-weight:700;
  transition:top .2s ease;outline:3px solid var(--gold);outline-offset:2px}
.skip:focus,.skip:focus-visible{top:12px;color:#fff}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
nav.links a:focus-visible,.btn:focus-visible{outline-color:var(--gold)}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;scroll-behavior:auto!important}
}

/* v3.9.2 — buscador semillas */
.formula{font-size:1.35em;font-weight:700;color:#0e7c6b;margin:.1em 0 .45em;overflow-wrap:anywhere}
.seedsearch{margin:18px 0 6px}
.seedsearch input[type=search]{width:100%;max-width:560px;padding:12px 14px;font-size:1.05em;border:2px solid #0e7c6b;border-radius:10px;background:#fff;color:#0f1830}
.seedchips{display:flex;gap:8px;margin:12px 0 4px;flex-wrap:wrap}
.seedchip{padding:8px 18px;border-radius:999px;border:2px solid #0e7c6b;background:transparent;color:#0e7c6b;font-weight:700;cursor:pointer;font-size:.95em}
.seedchip.on{background:#0e7c6b;color:#fff}

/* v3.9.4 — tablas con scroll horizontal en móvil */
.tscroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:18px 0}
.tscroll table.plain{min-width:620px}