/* ============================================================
   PLATAFORMA TÉRMICA · Sistema de diseño
   Identidad: laboratorio de física de edificios + revista científica premium + tropical
   Dark-first, técnico, sobrio. Calor = ámbar/rojo · Enfriamiento = cian/azul
   ============================================================ */

:root{
  /* Grounds */
  --bg:#0A0E13;
  --bg-1:#0E141B;
  --bg-2:#121A23;
  --bg-3:#18222E;
  --bg-glass:rgba(18,26,35,.66);
  --line:rgba(150,170,190,.13);
  --line-2:rgba(150,170,190,.22);
  /* Ink */
  --ink:#EEF3F6;
  --ink-soft:#AAB6C2;
  --muted:#6E7B88;
  --metal:#9DAAB8;
  /* Heat */
  --heat:#FF6A2B;
  --heat-hi:#FF9A48;
  --heat-deep:#E01F2B;
  --heat-soft:rgba(255,106,43,.14);
  --heat-line:rgba(255,106,43,.42);
  /* Cool */
  --cool:#2FCDE6;
  --cool-2:#3E86FF;
  --cool-soft:rgba(47,205,230,.13);
  --cool-line:rgba(47,205,230,.40);
  /* Trust */
  --t-strong:#37D399;
  --t-mod:#F6C544;
  --t-indirect:#57A9FF;
  --t-insuf:#8A94A0;
  /* Fonts */
  --f-display:"Archivo","Archivo Expanded",system-ui,sans-serif;
  --f-body:"Archivo",system-ui,-apple-system,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,monospace;
  --f-edit:"Fraunces",Georgia,serif;
  /* Metrics */
  --maxw:1200px;
  --pad:clamp(18px,5vw,40px);
  --radius:16px;
  --radius-s:10px;
  --shadow:0 2px 8px rgba(0,0,0,.35),0 24px 60px rgba(0,0,0,.42);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{animation-duration:.001ms!important;transition-duration:.001ms!important}}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--f-body);font-size:16.5px;line-height:1.6;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
/* ambient technical grid + heat aura */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1100px 700px at 82% -8%, rgba(255,106,43,.10), transparent 60%),
    radial-gradient(900px 700px at 0% 108%, rgba(47,205,230,.07), transparent 62%),
    var(--bg);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 78%);
          mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 78%);
}
img{max-width:100%;display:block}
a{color:var(--cool);text-decoration:none}
a:hover{color:var(--cool-2)}
:focus-visible{outline:2.5px solid var(--cool);outline-offset:3px;border-radius:6px}

/* ---------- Typography ---------- */
h1,h2,h3,h4{font-family:var(--f-display);font-weight:700;line-height:1.05;letter-spacing:-.02em;margin:0;text-wrap:balance;color:var(--ink)}
.edit{font-family:var(--f-edit);font-weight:400;font-style:italic;letter-spacing:0}
.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--metal)}
.eyebrow .dot{color:var(--heat)}
p{margin:0 0 1.05em;color:var(--ink-soft)}
strong{color:var(--ink);font-weight:600}
.lead{font-size:clamp(1.05rem,2.3vw,1.32rem);color:var(--ink-soft);line-height:1.5}
.mono{font-family:var(--f-mono)}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}
.narrow{max-width:760px}
section{padding-block:clamp(48px,8vw,92px)}
.sec-num{font-family:var(--f-mono);font-size:12px;letter-spacing:.16em;color:var(--heat)}

/* ---------- Top nav ---------- */
.nav{position:sticky;top:0;z-index:80;background:linear-gradient(var(--bg),rgba(10,14,19,.62));backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav .row{display:flex;align-items:center;gap:20px;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--f-display);font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.brand .mk{width:26px;height:26px;border-radius:7px;background:conic-gradient(from 210deg,var(--heat),var(--heat-hi),var(--cool),var(--heat));box-shadow:0 0 18px rgba(255,106,43,.5)}
.brand small{font-family:var(--f-mono);font-size:10px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;font-weight:400}
.nav-links{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav-links a{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);padding:9px 12px;border-radius:8px}
.nav-links a:hover{color:var(--ink);background:var(--bg-2)}
.nav-links a.cta{color:var(--bg);background:linear-gradient(100deg,var(--heat),var(--heat-hi));font-weight:600}
.nav-links a.cta:hover{color:var(--bg);filter:brightness(1.08)}
.lang-guia{margin-left:6px;display:inline-flex;gap:2px;border:1px solid var(--line-2);border-radius:20px;overflow:hidden;flex:none}
.lang-guia a{padding:6px 11px !important;font-size:11px !important;font-weight:600}
.lang-guia a.on{background:linear-gradient(100deg,var(--heat),var(--heat-hi));color:var(--bg)}
.lang-guia a.on:hover{color:var(--bg) !important;background:linear-gradient(100deg,var(--heat),var(--heat-hi)) !important}
.hamb{display:none;margin-left:auto;background:var(--bg-2);border:1px solid var(--line-2);color:var(--ink);width:42px;height:42px;border-radius:10px;font-size:18px;cursor:pointer}
@media(max-width:900px){
  .nav-links{display:none}
  .hamb{display:inline-flex;align-items:center;justify-content:center}
}
/* mobile sheet */
.msheet{position:fixed;inset:0;z-index:90;background:rgba(6,9,13,.82);backdrop-filter:blur(6px);display:none}
.msheet.open{display:block}
.msheet .panel{position:absolute;top:0;right:0;bottom:0;width:min(84vw,340px);background:var(--bg-1);border-left:1px solid var(--line-2);padding:20px;overflow:auto;display:flex;flex-direction:column;gap:6px}
.msheet .panel a{font-family:var(--f-mono);font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);padding:13px 12px;border-radius:10px;border:1px solid transparent}
.msheet .panel a:hover{background:var(--bg-2);color:var(--ink)}
.msheet .panel a.cta{background:linear-gradient(100deg,var(--heat),var(--heat-hi));color:var(--bg);font-weight:600;text-align:center;margin-top:8px}
.msheet .grp{font-family:var(--f-mono);font-size:10px;letter-spacing:.2em;color:var(--muted);text-transform:uppercase;margin:14px 6px 2px}

/* mobile bottom bar */
.botbar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;background:var(--bg-glass);backdrop-filter:blur(12px);border-top:1px solid var(--line-2)}
.botbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 4px;color:var(--ink-soft);font-family:var(--f-mono);font-size:9.5px;letter-spacing:.05em;text-transform:uppercase}
.botbar a .ic{font-size:17px}
.botbar a.cta{color:var(--heat-hi)}
@media(max-width:900px){.botbar{display:flex}body{padding-bottom:60px}}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--f-mono);font-size:13px;letter-spacing:.05em;text-transform:uppercase;font-weight:500;padding:14px 22px;border-radius:12px;border:1px solid var(--line-2);color:var(--ink);background:var(--bg-2);cursor:pointer;transition:.2s var(--ease);text-decoration:none}
.btn:hover{border-color:var(--line-2);transform:translateY(-1px);color:var(--ink)}
.btn.heat{background:linear-gradient(100deg,var(--heat),var(--heat-hi));color:#1a0d06;border-color:transparent;font-weight:600}
.btn.heat:hover{filter:brightness(1.08);color:#1a0d06}
.btn.cool{background:linear-gradient(100deg,var(--cool-2),var(--cool));color:#04121a;border-color:transparent;font-weight:600}
.btn.ghost{background:transparent}
.btn .arw{transition:transform .2s}
.btn:hover .arw{transform:translateX(3px)}

/* ---------- Hero ---------- */
.hero{position:relative;padding-block:clamp(30px,6vw,64px) clamp(30px,6vw,60px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,52px);align-items:center}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr;gap:28px}}
.hero h1{font-size:clamp(2.35rem,6.6vw,4.5rem);letter-spacing:-.03em}
.hero h1 .hl{background:linear-gradient(100deg,var(--heat-hi),var(--heat) 60%,var(--heat-deep));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{margin-top:18px;max-width:560px}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero .trust-row{display:flex;gap:18px;flex-wrap:wrap;margin-top:26px;font-family:var(--f-mono);font-size:11.5px;color:var(--muted);letter-spacing:.04em}
.hero .trust-row b{color:var(--ink)}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:16px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:860px){.g-3,.g-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g-2,.g-3,.g-4{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,var(--bg-2),var(--bg-1));border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.25s var(--ease)}
.card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.card h3{font-size:1.16rem;margin-bottom:8px}
.card p{font-size:14.5px;margin-bottom:0}
.card .kw{font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--heat);margin-bottom:12px;display:block}
a.card{color:inherit;display:block}
a.card .go{margin-top:14px;font-family:var(--f-mono);font-size:12px;color:var(--cool);text-transform:uppercase;letter-spacing:.06em}

/* stat tiles */
.stat{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.stat .n{font-family:var(--f-display);font-weight:700;font-size:clamp(1.9rem,4vw,2.6rem);line-height:1;letter-spacing:-.02em}
.stat.heat .n{color:var(--heat-hi)}.stat.cool .n{color:var(--cool)}
.stat .n small{font-size:.5em;color:var(--muted);font-weight:500}
.stat .lb{font-size:13.5px;color:var(--ink-soft);margin-top:10px}
.stat .src{font-family:var(--f-mono);font-size:10.5px;color:var(--muted);margin-top:8px}

/* ---------- Trust chips ---------- */
.trust{display:inline-flex;align-items:center;gap:7px;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;padding:3px 9px 3px 7px;border-radius:99px;border:1px solid;font-weight:500;white-space:nowrap;vertical-align:middle}
.trust .d{width:8px;height:8px;border-radius:50%}
.trust.strong{color:var(--t-strong);border-color:color-mix(in srgb,var(--t-strong) 45%,transparent)}.trust.strong .d{background:var(--t-strong);box-shadow:0 0 8px var(--t-strong)}
.trust.mod{color:var(--t-mod);border-color:color-mix(in srgb,var(--t-mod) 45%,transparent)}.trust.mod .d{background:var(--t-mod)}
.trust.indirect{color:var(--t-indirect);border-color:color-mix(in srgb,var(--t-indirect) 45%,transparent)}.trust.indirect .d{background:var(--t-indirect)}
.trust.insuf{color:var(--t-insuf);border-color:color-mix(in srgb,var(--t-insuf) 40%,transparent)}.trust.insuf .d{background:var(--t-insuf)}

/* ---------- Source cite / evidence popover ---------- */
.cite{color:var(--cool);border-bottom:1px dotted var(--cool-line);cursor:pointer;font-style:normal}
.cite:hover{color:var(--cool-2)}
.evbtn{display:inline-flex;align-items:center;gap:7px;font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--cool);background:var(--cool-soft);border:1px solid var(--cool-line);border-radius:8px;padding:6px 11px;cursor:pointer;margin-top:6px}
.evbtn:hover{color:var(--ink)}
.popover{position:fixed;z-index:120;max-width:min(92vw,420px);background:var(--bg-3);border:1px solid var(--line-2);border-radius:14px;box-shadow:var(--shadow);padding:18px;display:none}
.popover.open{display:block}
.popover .pt{font-family:var(--f-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--heat);margin-bottom:6px}
.popover h4{font-size:1rem;margin-bottom:6px}
.popover p{font-size:13px;margin-bottom:8px}
.popover .apa{font-family:var(--f-mono);font-size:11.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:8px;word-break:break-word}
.popover .x{position:absolute;top:10px;right:10px;background:var(--bg-2);border:1px solid var(--line);color:var(--ink-soft);width:26px;height:26px;border-radius:7px;cursor:pointer}

/* ---------- Quick answer / callouts ---------- */
.answer{border:1px solid var(--line-2);border-left:4px solid var(--cool);background:linear-gradient(100deg,var(--cool-soft),transparent 70%);border-radius:14px;padding:20px 22px}
.answer .h{font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--cool);margin-bottom:8px}
.answer p{font-size:1.02rem;color:var(--ink);margin-bottom:0}
.callout{border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:20px 0;font-size:15px}
.callout.heat{border-left:4px solid var(--heat)}
.callout.warn{border-left:4px solid var(--t-mod)}
.callout .h{font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.callout p:last-child{margin-bottom:0}

/* ---------- Tables ---------- */
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;margin:20px 0}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:14px}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{font-family:var(--f-mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--metal);background:var(--bg-2);font-weight:500}
tbody tr:hover{background:var(--bg-2)}
td.num,th.num{text-align:right;font-family:var(--f-mono);font-variant-numeric:tabular-nums}
tbody tr:last-child td{border-bottom:none}
caption{caption-side:top;text-align:left;font-family:var(--f-mono);font-size:11.5px;color:var(--muted);padding:0 4px 10px}

/* ---------- FAQ ---------- */
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{width:100%;text-align:left;background:none;border:0;color:var(--ink);font-family:var(--f-display);font-weight:600;font-size:1.05rem;padding:18px 40px 18px 0;cursor:pointer;position:relative}
.faq-q::after{content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);color:var(--heat);font-family:var(--f-mono);font-size:1.3rem;transition:.2s}
.faq-q[aria-expanded="true"]::after{content:"\2013"}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a .inner{padding:0 0 18px;font-size:14.5px;color:var(--ink-soft)}

/* ---------- Steps (funnel / process) ---------- */
.steps{counter-reset:st;display:grid;gap:14px}
.step{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;border:1px solid var(--line);border-radius:14px;padding:18px 20px;background:var(--bg-1)}
.step::before{counter-increment:st;content:"0" counter(st);font-family:var(--f-mono);font-size:1.1rem;color:var(--heat);font-weight:600}
.step h4{font-size:1.05rem;margin-bottom:4px}
.step p{font-size:14px;margin-bottom:0}

/* ---------- CTA band ---------- */
.ctaband{position:relative;overflow:hidden;border:1px solid var(--heat-line);border-radius:22px;padding:clamp(26px,5vw,48px);background:linear-gradient(120deg,rgba(255,106,43,.12),rgba(224,31,43,.06) 60%,transparent);margin:8px 0}
.ctaband::before{content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(255,106,43,.28),transparent 70%);pointer-events:none}
.ctaband h2{font-size:clamp(1.5rem,4vw,2.3rem);max-width:640px}
.ctaband p{margin-top:10px;max-width:560px}
.ctaband .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;position:relative}

/* ---------- Footer ---------- */
footer.site{border-top:1px solid var(--line);margin-top:40px;padding-block:44px 30px;background:var(--bg-1)}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
@media(max-width:760px){footer.site .cols{grid-template-columns:1fr 1fr}}
@media(max-width:460px){footer.site .cols{grid-template-columns:1fr}}
footer.site h5{font-family:var(--f-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
footer.site a{display:block;color:var(--ink-soft);font-size:13.5px;padding:4px 0}
footer.site a:hover{color:var(--ink)}
footer.site .fine{margin-top:30px;border-top:1px solid var(--line);padding-top:18px;font-family:var(--f-mono);font-size:11px;color:var(--muted);line-height:1.7}

/* ---------- breadcrumb ---------- */
.crumb{font-family:var(--f-mono);font-size:11px;letter-spacing:.05em;color:var(--muted);padding-top:18px}
.crumb a{color:var(--ink-soft)}.crumb a:hover{color:var(--cool)}

/* =========================================================
   INTERACTIVE TOOLS
   ========================================================= */
.tool{background:linear-gradient(180deg,var(--bg-2),var(--bg-1));border:1px solid var(--line-2);border-radius:20px;padding:clamp(18px,3vw,28px);box-shadow:var(--shadow)}
.tool .tag{font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--heat)}
.tool h3{font-size:clamp(1.2rem,3vw,1.6rem);margin:8px 0 4px}
.tool .sub{color:var(--ink-soft);font-size:14.5px;margin-bottom:18px}

/* Hero house (SVG) */
.house-stage{position:relative;border:1px solid var(--line-2);border-radius:20px;overflow:hidden;background:radial-gradient(120% 120% at 70% 0%,#12202c,#0a1017)}
.house-stage svg{display:block;width:100%;height:auto}
.hs-hint{position:absolute;left:14px;bottom:12px;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.hs-panel{margin-top:14px;border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:var(--bg-2);min-height:96px}
.hs-panel .pt{font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--heat);margin-bottom:6px}
.hs-panel h4{font-size:1.1rem;margin-bottom:6px}
.hs-panel p{font-size:14px;margin-bottom:0}
.hotspot{cursor:pointer}
.hotspot circle.ring{fill:rgba(255,106,43,.14);stroke:var(--heat);stroke-width:1.4}
.hotspot.active circle.ring{fill:rgba(255,106,43,.32)}
.hotspot text{font-family:var(--f-mono);font-size:11px;fill:var(--ink);text-anchor:middle;pointer-events:none}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.chip-btn{font-family:var(--f-mono);font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-soft);background:var(--bg-3);border:1px solid var(--line);border-radius:99px;padding:8px 13px;cursor:pointer}
.chip-btn.active,.chip-btn:hover{color:var(--bg);background:linear-gradient(100deg,var(--heat),var(--heat-hi));border-color:transparent;font-weight:600}

/* Simulator */
.sim-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:820px){.sim-grid{grid-template-columns:1fr}}
.field{margin-bottom:14px}
.field label{display:block;font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--metal);margin-bottom:6px}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{font-size:13px;color:var(--ink-soft);background:var(--bg-3);border:1px solid var(--line);border-radius:9px;padding:8px 12px;cursor:pointer;font-family:var(--f-body)}
.seg button.on{color:var(--bg);background:var(--cool);border-color:transparent;font-weight:600}
.seg button.on.heaty{background:var(--heat-hi)}
.gauge{border:1px solid var(--line-2);border-radius:16px;padding:20px;background:var(--bg-1)}
.gauge .index{font-family:var(--f-display);font-weight:700;font-size:3.2rem;line-height:1;letter-spacing:-.02em}
.gauge .barouter{height:14px;border-radius:99px;background:linear-gradient(90deg,var(--cool),#7fd66b,var(--t-mod),var(--heat),var(--heat-deep));position:relative;margin:14px 0 6px;overflow:visible}
.gauge .marker{position:absolute;top:-5px;width:6px;height:24px;border-radius:3px;background:#fff;box-shadow:0 0 0 3px var(--bg-1),0 0 14px rgba(255,255,255,.6);transition:left .5s var(--ease)}
.gauge .scalelab{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.gauge .verdict{margin-top:14px;font-size:14px;color:var(--ink-soft)}
.crit-list{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}
.crit-list li{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-soft);border:1px solid var(--line);border-radius:10px;padding:9px 12px}
.crit-list li .bt{margin-left:auto;font-family:var(--f-mono);font-size:11px}
.toggle-row{display:flex;align-items:center;gap:10px;margin:14px 0}
.switch{--w:52px;position:relative;width:var(--w);height:28px;border-radius:99px;background:var(--bg-3);border:1px solid var(--line-2);cursor:pointer;flex:none}
.switch::after{content:"";position:absolute;top:2px;left:2px;width:22px;height:22px;border-radius:50%;background:var(--metal);transition:.22s var(--ease)}
.switch.on{background:linear-gradient(100deg,var(--cool-2),var(--cool))}
.switch.on::after{left:calc(var(--w) - 24px);background:#fff}

/* Myths */
.myth{border:1px solid var(--line);border-radius:16px;padding:20px;background:var(--bg-1);cursor:pointer;transition:.2s var(--ease)}
.myth:hover{border-color:var(--line-2);transform:translateY(-2px)}
.myth .claim{font-family:var(--f-display);font-weight:600;font-size:1.06rem;margin-bottom:12px}
.myth .verdict-tag{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:99px;display:inline-block;font-weight:600}
.myth .verdict-tag.falso{color:#ff8a7a;background:rgba(224,31,43,.14);border:1px solid rgba(224,31,43,.4)}
.myth .verdict-tag.parcial{color:var(--t-mod);background:rgba(246,197,68,.12);border:1px solid rgba(246,197,68,.4)}
.myth .verdict-tag.verdad{color:var(--t-strong);background:rgba(55,211,153,.12);border:1px solid rgba(55,211,153,.4)}
.myth .exp{font-size:14px;color:var(--ink-soft);margin-top:12px;max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.myth.open .exp{max-height:340px}
.myth .rev{font-family:var(--f-mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-top:12px}

/* Roof builder */
.roof-stage{border:1px solid var(--line-2);border-radius:16px;background:radial-gradient(120% 120% at 50% 0%,#122430,#0a1017);padding:20px;min-height:230px;display:flex;flex-direction:column;justify-content:center;gap:5px}
.roof-layer{height:26px;border-radius:7px;display:flex;align-items:center;padding:0 12px;font-family:var(--f-mono);font-size:11px;letter-spacing:.04em;color:#0a1017;font-weight:600;opacity:.25;transition:.25s var(--ease);transform:translateX(-8px)}
.roof-layer.on{opacity:1;transform:none}
.roof-sun{align-self:flex-end;font-size:22px;margin-bottom:6px}
.rl-lamina{background:linear-gradient(90deg,#c9d3dd,#9daab8)}
.rl-camara{background:repeating-linear-gradient(90deg,#1a2732,#1a2732 8px,#223140 8px,#223140 16px);color:var(--ink)}
.rl-barrera{background:linear-gradient(90deg,#e6e9ee,#c7ccd6)}
.rl-aislante{background:linear-gradient(90deg,#ffd27f,#ffb454);}
.rl-cielo{background:linear-gradient(90deg,#e8e2d6,#d8cdb8)}
.roof-toggles{display:flex;flex-direction:column;gap:8px;margin-top:14px}
.roof-toggles .rt{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:11px;padding:10px 12px;cursor:pointer}
.roof-toggles .rt .fn{font-size:13px;color:var(--ink-soft)}
.roof-toggles .rt b{font-size:14px}
.protbar{margin-top:16px}
.protbar .track{height:12px;border-radius:99px;background:var(--bg-3);overflow:hidden;border:1px solid var(--line)}
.protbar .fill{height:100%;width:8%;border-radius:99px;background:linear-gradient(90deg,var(--cool),#7fd66b,var(--t-mod),var(--heat));transition:width .35s var(--ease)}
.protbar .lab{font-family:var(--f-mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-top:8px;display:flex;justify-content:space-between}

/* Before/After slider */
.ba{position:relative;border:1px solid var(--line-2);border-radius:16px;overflow:hidden;user-select:none;touch-action:none;background:#0a1017}
.ba svg{display:block;width:100%;height:auto}
.ba .after{position:absolute;inset:0;clip-path:inset(0 0 0 50%)}
.ba .handle{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;box-shadow:0 0 12px rgba(255,255,255,.6);cursor:ew-resize}
.ba .knob{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:44px;height:44px;border-radius:50%;background:var(--bg-3);border:2px solid #fff;display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--f-mono);font-size:14px;cursor:ew-resize}
.ba .lbl{position:absolute;top:12px;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;padding:5px 10px;border-radius:99px;background:rgba(10,16,23,.7);backdrop-filter:blur(4px)}
.ba .lbl.l{left:12px;color:var(--heat-hi)}.ba .lbl.r{right:12px;color:var(--cool)}

/* Comparator */
.cmp-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.cmp-tabs button{font-family:var(--f-mono);font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-soft);background:var(--bg-3);border:1px solid var(--line);border-radius:10px;padding:9px 13px;cursor:pointer}
.cmp-tabs button.on{color:var(--bg);background:var(--cool);border-color:transparent;font-weight:600}
.cmp-out{display:grid;gap:12px}

/* Calculator */
.calc-out{border:1px solid var(--line-2);border-radius:16px;padding:22px;background:var(--bg-1)}
.calc-out .rng{font-family:var(--f-display);font-weight:700;font-size:clamp(1.6rem,4vw,2.3rem);color:var(--cool);letter-spacing:-.02em}
.calc-note{font-size:12.5px;color:var(--muted);margin-top:10px}

/* Symptom diagnostic */
.sym-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media(max-width:560px){.sym-grid{grid-template-columns:1fr}}
.sym{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;background:var(--bg-1);transition:.2s}
.sym:hover{border-color:var(--heat-line)}
.sym.on{border-color:var(--heat);background:var(--heat-soft)}
.sym .em{font-size:20px}
.sym span{font-size:14px;color:var(--ink)}
.sym-result{margin-top:18px;border:1px solid var(--line-2);border-radius:16px;padding:20px;background:var(--bg-1);display:none}
.sym-result.show{display:block}

/* data-viz bars */
.vbars{display:flex;flex-direction:column;gap:12px;margin:18px 0}
.vbar{display:grid;grid-template-columns:120px 1fr 52px;gap:12px;align-items:center;font-size:14px}
.vbar .t{height:24px;background:var(--bg-3);border:1px solid var(--line);border-radius:7px;overflow:hidden}
.vbar .f{height:100%;border-radius:6px}
.vbar .v{font-family:var(--f-mono);text-align:right;color:var(--ink)}
@media(max-width:520px){.vbar{grid-template-columns:92px 1fr 44px;gap:8px;font-size:12.5px}}

/* timeline */
.timeline{display:flex;gap:0;overflow-x:auto;padding-bottom:8px;margin:18px 0}
.tl-node{flex:1;min-width:130px;border-left:1px solid var(--line);padding:0 16px}
.tl-node .yr{font-family:var(--f-mono);font-size:12px;color:var(--heat)}
.tl-node .val{font-family:var(--f-display);font-weight:700;font-size:1.5rem;margin:6px 0 2px}
.tl-node .cap{font-size:12px;color:var(--muted)}

.hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.tagrow{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.pill{font-family:var(--f-mono);font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft);border:1px solid var(--line);border-radius:99px;padding:5px 11px}
.reveal{opacity:1}