:root{
  --serif:'Instrument Serif',Georgia,serif;
  --sans:'Familjen Grotesk',system-ui,sans-serif;
}
html[data-mode="hot"]{
  --bg:#f1e8d8;--ink:#2a1710;--accent:#e4572e;--accent-ink:#fff;--soft:#e6d6ba;--card:#fbf5ea;
  --line:rgba(42,23,16,.16);--muted:rgba(42,23,16,.62);--halo:rgba(228,87,46,.28);
}
html[data-mode="cold"]{
  --bg:#0d2231;--ink:#e6f4fa;--accent:#7fd3ee;--accent-ink:#06202e;--soft:#14324a;--card:#12304a;
  --line:rgba(230,244,250,.16);--muted:rgba(230,244,250,.62);--halo:rgba(127,211,238,.26);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.55;overflow-x:hidden;transition:background .6s,color .6s}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
::selection{background:var(--accent);color:var(--accent-ink)}
em{font-family:var(--serif);font-style:italic;font-weight:400}

/* Curvas de nivel */
.topo{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.topo path{fill:none;stroke:var(--line);stroke-width:1.2;transition:stroke .6s}
main,footer{position:relative;z-index:2}

/* Nav */
.nav{
  position:sticky;top:0;z-index:60;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 4vw;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);transition:background .6s;
}
.logo{font-family:var(--serif);font-size:34px;line-height:1;letter-spacing:-.02em}
.logo sup{font-family:var(--sans);font-size:.45em;color:var(--accent);margin-left:2px}
.links{display:flex;gap:28px;font-weight:500;font-size:15px}
.links a{position:relative}
.links a::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:2px;background:var(--accent);transition:width .25s}
.links a:hover::after{width:100%}
.nav-right{display:flex;align-items:center;gap:12px}
.mode{display:flex;background:var(--soft);border-radius:40px;padding:4px;transition:background .6s}
.mode button{background:none;border:0;padding:7px 16px;border-radius:30px;font-weight:600;font-size:14px;transition:.25s}
.mode button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.cart-btn{background:transparent;border:1.5px solid var(--ink);border-radius:40px;padding:7px 16px;font-weight:600;font-size:14px;transition:.2s}
.cart-btn:hover{background:var(--ink);color:var(--bg)}
.cart-btn b{background:var(--accent);color:var(--accent-ink);display:inline-block;min-width:22px;height:22px;line-height:22px;text-align:center;border-radius:50%;font-size:12px;margin-left:4px}
.cart-btn.bump{animation:bump .4s}
@keyframes bump{40%{transform:scale(1.1)}}

/* Botones */
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);border:0;border-radius:50px;padding:15px 30px;font-weight:700;transition:transform .2s,filter .2s;text-align:center}
.btn:hover{transform:translateY(-2px);filter:brightness(1.08)}
.btn.full{display:block;width:100%}
.btn-line{font-weight:600;border-bottom:2px solid currentColor;padding-bottom:2px;transition:color .2s}
.btn-line:hover{color:var(--accent)}

/* Hero */
.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:30px;align-items:center;padding:70px 4vw 60px;min-height:84vh;max-width:1440px;margin:0 auto}
.eyebrow{font-weight:600;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(52px,8.4vw,128px);line-height:.95;letter-spacing:-.03em;margin-bottom:28px}
h1 em{color:var(--accent)}
.lead{max-width:48ch;font-size:19px;color:var(--muted);margin-bottom:30px}
.hero-cta{display:flex;gap:26px;align-items:center;flex-wrap:wrap}

.ticker{display:flex;gap:14px;margin-top:46px;flex-wrap:wrap}
.tk,.tk-time{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:14px 22px;min-width:130px;transition:background .6s}
.tk small,.tk-time small{display:block;font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.tk b{font-family:var(--serif);font-weight:400;font-size:46px;line-height:1.05;color:var(--accent);font-variant-numeric:tabular-nums}
.tk.dim b{color:var(--ink);opacity:.55}
.tk-time{background:transparent;border-style:dashed}
.tk-time b{font-family:var(--serif);font-weight:400;font-size:46px;line-height:1.05;font-variant-numeric:tabular-nums}

.hero-cup{position:relative;display:grid;place-items:center;min-height:520px}
.halo{position:absolute;width:min(480px,90%);aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,var(--halo),transparent 68%);transition:background .6s}
.hero-cup .cup-wrap{position:relative;width:min(300px,62vw);animation:float 6s ease-in-out infinite}
@keyframes float{50%{transform:translateY(-14px) rotate(1.5deg)}}
.tag-float{position:absolute;bottom:14px;right:4%;background:var(--ink);color:var(--bg);padding:7px 16px;border-radius:30px;font-size:13px;font-weight:600;letter-spacing:.04em}
.cup-wrap svg{width:100%;height:auto;display:block;filter:drop-shadow(0 26px 24px rgba(0,0,0,.22))}

/* Efectos vapor / copos */
.fx{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.fx i{position:absolute;bottom:42%;border-radius:50%;opacity:0}
html[data-mode="hot"] .fx i{width:26px;height:26px;background:radial-gradient(circle,rgba(255,255,255,.75),transparent 70%);animation:steam 4.2s ease-out infinite}
html[data-mode="cold"] .fx i{width:7px;height:7px;background:#fff;box-shadow:0 0 8px #bfe9f7;animation:snow 5.5s linear infinite;bottom:auto;top:-10px}
@keyframes steam{0%{transform:translate(0,0) scale(.5);opacity:0}25%{opacity:.8}100%{transform:translate(var(--dx),-210px) scale(2.2);opacity:0}}
@keyframes snow{0%{transform:translate(0,0);opacity:0}10%{opacity:1}100%{transform:translate(var(--dx),540px);opacity:0}}

/* Marquee */
.marquee{border-block:1px solid var(--line);overflow:hidden;white-space:nowrap;background:var(--soft);transition:background .6s}
.marquee-track{display:inline-flex;gap:46px;padding:14px 0;animation:mq 34s linear infinite;font-family:var(--serif);font-size:30px;font-style:italic}
.marquee-track span{flex:none}
.marquee-track span::after{content:"✺";font-style:normal;font-size:20px;color:var(--accent);margin-left:46px}
@keyframes mq{to{transform:translateX(-50%)}}

/* Bloques */
.block{padding:120px 4vw 0;max-width:1440px;margin:0 auto}
.sec-head{margin-bottom:46px;max-width:860px}
h2{font-family:var(--serif);font-weight:400;font-size:clamp(44px,6.6vw,96px);line-height:.98;letter-spacing:-.03em}
h2 em{color:var(--accent)}
.sub{margin-top:20px;max-width:54ch;color:var(--muted);font-size:18px}

/* Simulador */
.sim{display:grid;grid-template-columns:1.7fr 1fr;gap:26px}
.sim-chart,.sim-panel{background:var(--card);border:1px solid var(--line);border-radius:30px;padding:26px;transition:background .6s}
.sim-chart{display:flex;flex-direction:column;gap:14px}
#chart{width:100%;height:380px;display:block}
.legend{display:flex;gap:22px;flex-wrap:wrap;font-size:14px;font-weight:600}
.legend span{display:inline-flex;align-items:center;gap:8px}
.legend i{display:inline-block;width:26px;height:0;border-top:4px solid var(--accent)}
.legend .k2{border-top:3px solid var(--ink);opacity:.5}
.legend .k3{border-top:2px dotted var(--muted)}
.sim-panel{display:flex;flex-direction:column;gap:22px}
label{display:grid;gap:8px;font-weight:600;font-size:14px}
label.range{grid-template-columns:1fr auto}
label.range input{grid-column:1/-1}
output{color:var(--accent);font-weight:700}
select,input[type=text],input[type=email]{background:var(--bg);border:1.5px solid var(--line);border-radius:14px;padding:12px 14px;outline:none;width:100%;transition:border-color .2s,background .6s}
select:focus,input:focus{border-color:var(--accent)}
input.error{border-color:#e5384a}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:6px;background:var(--line);outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;border-radius:50%;background:var(--accent);border:5px solid var(--card);box-shadow:0 0 0 2px var(--accent);cursor:pointer}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--accent);border:4px solid var(--card);cursor:pointer}
.readout{background:var(--bg);border-radius:22px;padding:20px;display:grid;gap:14px;transition:background .6s}
.readout small{display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;color:var(--muted)}
.r-main b{font-family:var(--serif);font-weight:400;font-size:72px;line-height:1;color:var(--accent)}
.r-sub{border-top:1px dashed var(--line);padding-top:12px}
.r-sub b{font-family:var(--serif);font-weight:400;font-size:34px;opacity:.6}
.until{font-size:15px;color:var(--muted)}
.until b{color:var(--ink)}

/* Armador */
.builder{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.preview{position:relative}
.preview-stage{background:var(--soft);border-radius:40px;min-height:560px;display:grid;place-items:end center;padding:40px 20px 0;position:relative;overflow:hidden;transition:background .6s}
.preview-stage::before{content:"";position:absolute;width:80%;aspect-ratio:1;border-radius:50%;background:var(--halo);top:50%;left:50%;transform:translate(-50%,-50%)}
#prevCup{position:relative;width:min(320px,70%);transition:transform .5s cubic-bezier(.3,1.4,.5,1);transform-origin:bottom center;padding-bottom:32px}
.size-tag{position:absolute;top:20px;left:20px;background:var(--ink);color:var(--bg);padding:6px 16px;border-radius:30px;font-weight:700;font-size:14px}
.controls{display:grid;gap:30px}
.field h3{font-size:14px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;margin-bottom:14px}
.field h3 span{color:var(--accent);margin-left:6px;text-transform:none;letter-spacing:0}
.field h3 small{font-weight:500;text-transform:none;letter-spacing:0;color:var(--muted)}
.swatches{display:flex;gap:12px;flex-wrap:wrap}
.sw{width:46px;height:46px;border-radius:50%;border:2px solid var(--ink);background:var(--c);transition:transform .2s;position:relative}
.sw:hover{transform:scale(1.12)}
.sw[aria-checked="true"]{box-shadow:0 0 0 4px var(--bg),0 0 0 6px var(--accent)}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.seg button{background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:14px 8px;text-align:center;font-weight:600;transition:.2s}
.seg button b{display:block;font-family:var(--serif);font-weight:400;font-size:28px;line-height:1}
.seg button small{color:var(--muted);font-size:13px}
.seg button:hover{border-color:var(--accent)}
.seg button[aria-checked="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.seg button[aria-checked="true"] small{color:inherit;opacity:.7}
.buy-row{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;border-top:1px solid var(--ink);padding-top:22px;flex-wrap:wrap}
.buy-row small{display:block;font-weight:600;color:var(--muted)}
.buy-row b{font-family:var(--serif);font-weight:400;font-size:60px;line-height:1}

/* Capas */
.layers{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.cut{width:100%;max-width:460px;margin:0 auto;display:block}
.layer{transition:opacity .3s,transform .3s;transform-origin:150px 200px}
.cut.focus .layer{opacity:.25}
.cut.focus .layer.on{opacity:1;transform:scale(1.02)}
.l-outer{fill:#9aa4ab;stroke:var(--ink);stroke-width:3}
.l-vac{fill:var(--bg);stroke:var(--ink);stroke-width:2;stroke-dasharray:6 6;transition:fill .6s}
.l-inner{fill:#c6ccd1;stroke:var(--ink);stroke-width:3}
.l-liquid{fill:var(--accent);opacity:.9}
.hatch line{stroke:var(--line);stroke-width:2}
.bubbles-cut circle{fill:rgba(255,255,255,.7);animation:rise 3.6s linear infinite}
@keyframes rise{from{transform:translateY(0);opacity:0}20%{opacity:1}to{transform:translateY(-190px);opacity:0}}
.layer-list{list-style:none;display:grid;gap:0;border-top:1px solid var(--ink)}
.layer-list li{border-bottom:1px solid var(--line)}
.layer-list button{width:100%;text-align:left;background:none;border:0;padding:22px 4px;display:grid;grid-template-columns:44px 1fr;gap:14px;transition:padding .3s}
.layer-list button:hover,.layer-list button.on{padding-left:14px}
.layer-list i{font-style:normal;font-family:var(--serif);font-size:30px;color:var(--accent);line-height:1}
.layer-list h3{font-family:var(--serif);font-weight:400;font-size:32px;line-height:1.05;margin-bottom:4px}
.layer-list p{color:var(--muted);font-size:16px;max-height:0;overflow:hidden;opacity:0;transition:max-height .4s,opacity .4s}
.layer-list button.on p,.layer-list button:hover p{max-height:120px;opacity:1}

/* Empresas */
.corp{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;background:var(--ink);color:var(--bg);border-radius:44px;padding:clamp(30px,5vw,70px);transition:background .6s,color .6s}
.corp h2 em{color:var(--accent)}
.corp .sub{color:inherit;opacity:.7}
.corp output{color:var(--accent)}
.corp-left label.range{margin-top:30px}
.corp input[type=range]{background:rgba(255,255,255,.25)}
html[data-mode="cold"] .corp input[type=range]{background:rgba(6,32,46,.25)}
.corp input[type=range]::-webkit-slider-thumb{border-color:var(--ink)}
.tiers{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:20px 0}
.tier{border:1.5px solid rgba(128,128,128,.4);border-radius:14px;padding:10px 6px;text-align:center;font-size:13px;transition:.25s}
.tier b{display:block;font-family:var(--serif);font-weight:400;font-size:26px;line-height:1.1}
.tier.on{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.corp-total{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.corp-total small{display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;opacity:.65}
.corp-total b{font-family:var(--serif);font-weight:400;font-size:clamp(34px,4vw,52px);line-height:1.05}
#corpForm{background:var(--bg);color:var(--ink);border-radius:30px;padding:30px;display:grid;gap:16px;align-self:start;transition:background .6s,color .6s}
#corpForm h3{font-family:var(--serif);font-weight:400;font-size:34px;line-height:1.05}
#corpForm input{background:var(--card)}
.msg{min-height:22px;font-weight:600;font-size:14px;text-align:center;color:var(--accent)}
.msg.err{color:#e5384a}

/* Footer */
footer{margin-top:120px;padding:60px 4vw 30px;border-top:1px solid var(--line)}
.foot-top{display:flex;justify-content:space-between;gap:30px;align-items:flex-end;flex-wrap:wrap;margin-bottom:40px}
.foot-top .logo{font-size:clamp(70px,14vw,200px);line-height:.85;color:var(--accent)}
.foot-top p{max-width:42ch;color:var(--muted);font-size:15px}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:26px;margin-bottom:34px}
.foot-grid h4{font-size:13px;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);margin-bottom:6px}
.copy{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:18px}

/* Carrito */
dialog{border:0;border-radius:28px;padding:0;background:var(--bg);color:var(--ink);width:min(480px,92vw);margin:auto;box-shadow:0 40px 90px -20px rgba(0,0,0,.55)}
dialog::backdrop{background:rgba(0,0,0,.55);backdrop-filter:blur(4px)}
dialog[open]{animation:pop .3s}
@keyframes pop{from{opacity:0;transform:translateY(20px) scale(.96)}}
.dlg{padding:30px;display:grid;gap:16px;position:relative}
.dlg h3{font-family:var(--serif);font-weight:400;font-size:40px;line-height:1}
.x{position:absolute;top:18px;right:18px;width:38px;height:38px;border-radius:50%;border:1.5px solid var(--line);background:none}
.x:hover{background:var(--ink);color:var(--bg)}
.c-item{display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center;padding:12px 0;border-bottom:1px dashed var(--line)}
.c-dot{width:44px;height:44px;border-radius:50%;background:var(--c);border:2px solid var(--ink)}
.c-item h4{font-size:16px;line-height:1.2}
.c-item small{color:var(--muted)}
.c-item button{background:none;border:0;text-decoration:underline;font-size:13px;margin-top:2px}
.empty{padding:34px 0;text-align:center;color:var(--muted)}
.dlg-total{display:flex;justify-content:space-between;align-items:baseline;font-weight:600}
.dlg-total b{font-family:var(--serif);font-weight:400;font-size:42px}
.link{background:none;border:0;text-decoration:underline;font-size:14px;justify-self:center}
.btn.disabled{opacity:.4;pointer-events:none}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,120px);background:var(--ink);color:var(--bg);padding:12px 24px;border-radius:40px;font-weight:600;z-index:120;transition:transform .35s cubic-bezier(.3,1.5,.5,1);white-space:nowrap}
.toast.show{transform:translate(-50%,0)}

/* Reveal */
.rv{opacity:0;transform:translateY(36px);transition:opacity .8s,transform .8s}
.rv.in{opacity:1;transform:none}

@media(max-width:980px){
  .hero{grid-template-columns:1fr;padding-top:40px}
  .hero-cup{min-height:420px}
  .sim,.builder,.layers,.corp{grid-template-columns:1fr}
  .links{display:none}
  .preview-stage{min-height:460px}
  #chart{height:300px}
}
@media(max-width:560px){
  .mode button{padding:7px 11px}
  .nav{padding:12px 4vw}
  .logo{font-size:28px}
  .tiers{grid-template-columns:1fr 1fr}
}
@media(prefers-reduced-motion:reduce){
  .hero-cup .cup-wrap,.marquee-track,.fx i,.bubbles-cut circle{animation:none}
  .rv{opacity:1;transform:none;transition:none}
}