:root{
  --bg:#e8e5df;
  --paper:#f4f1ea;
  --ink:#111111;
  --dark:#151515;
  --orange:#ff5a1f;
  --sage:#9bb59a;
  --line:rgba(17,17,17,.18);
  --muted:rgba(17,17,17,.6);
  --head:'Syne',system-ui,sans-serif;
  --body:'Inter',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.55;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
::selection{background:var(--orange);color:#fff}

.progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--orange);z-index:100}

/* Header */
.top{
  position:sticky;top:0;z-index:50;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  padding:16px 4vw;background:rgba(232,229,223,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--head);font-weight:800;font-size:26px;letter-spacing:-.03em}
.dot{width:14px;height:14px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(255,90,31,.25);animation:pulse 2.4s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 9px rgba(255,90,31,0)}}
.top nav{display:flex;gap:30px;font-size:14px;font-weight:500}
.top nav a{position:relative;padding:4px 0}
.top nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--ink);transition:width .25s}
.top nav a:hover::after{width:100%}
.top-cta{justify-self:end;background:var(--ink);color:var(--paper);padding:10px 22px;border-radius:50px;font-weight:600;font-size:14px;transition:background .2s}
.top-cta:hover{background:var(--orange)}

/* Hero */
.hero{padding:90px 4vw 50px;max-width:1400px;margin:0 auto}
.kicker{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.1em}
.kicker span{background:var(--ink);color:var(--paper);padding:3px 10px;border-radius:30px;letter-spacing:.04em}
h1{font-family:var(--head);font-weight:800;font-size:clamp(52px,10.5vw,160px);line-height:.92;letter-spacing:-.05em;margin:26px 0 40px;max-width:11ch}
h1 em{font-style:normal;color:var(--orange)}
.hero-row{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;border-top:1px solid var(--ink);padding-top:24px}
.lead{max-width:46ch;font-size:19px;color:var(--muted)}
.arrow-link{font-weight:600;border-bottom:2px solid var(--ink);padding-bottom:3px;display:inline-flex;gap:10px;transition:gap .2s,color .2s}
.arrow-link:hover{color:var(--orange);border-color:var(--orange);gap:16px}
.arrow-link span{animation:bounce 1.6s infinite}
@keyframes bounce{50%{transform:translateY(4px)}}

/* Laboratorio */
.lab{padding:0 4vw;max-width:1400px;margin:0 auto}
.lab-card{
  background:var(--dark);color:var(--paper);border-radius:32px;padding:clamp(22px,3.5vw,50px);
  display:grid;grid-template-columns:.9fr 1fr 1.05fr;gap:clamp(20px,3vw,50px);align-items:center;
}
.col{min-width:0}
.kettle-col{text-align:center}
#kettle{width:100%;max-width:340px;overflow:visible}
.cap{font-size:13px;color:rgba(244,241,234,.6);margin-top:6px}
.cap b{color:var(--paper)}
#steam{opacity:var(--steam,0);transition:opacity .4s}
.puff{fill:none;stroke:rgba(244,241,234,.7);stroke-width:5;stroke-linecap:round;animation:steam 2.6s ease-in infinite}
.p2{animation-delay:.8s}.p3{animation-delay:1.6s}
@keyframes steam{0%{transform:translateY(16px);opacity:0}30%{opacity:1}100%{transform:translateY(-18px);opacity:0}}
#water{transition:fill .3s}

.dial-col{text-align:center}
#dial{width:100%;max-width:360px;touch-action:none;cursor:grab;outline:none;-webkit-tap-highlight-color:transparent}
#dial:active{cursor:grabbing}
#dial:focus-visible #track{stroke:#555}
.knob-t{fill:#f4f1ea;font-family:var(--head);font-weight:800;font-size:38px}
.knob-s{fill:rgba(244,241,234,.45);font-size:10px;letter-spacing:.25em;font-weight:600}
#ticks line{stroke:rgba(244,241,234,.35);stroke-width:2}
#ticks line.major{stroke:rgba(244,241,234,.8);stroke-width:3}
#labels text{fill:rgba(244,241,234,.65);font-size:11px;font-weight:600}
#needle{transform-origin:150px 150px}
.presets{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:12px}
.presets button{background:transparent;border:1px solid rgba(244,241,234,.3);color:var(--paper);border-radius:40px;padding:7px 14px;font-size:13px;font-weight:600;transition:.2s}
.presets button:hover{border-color:var(--orange);color:var(--orange)}
.presets button.on{background:var(--orange);border-color:var(--orange);color:#fff}

.small{font-size:12px;text-transform:uppercase;letter-spacing:.14em;font-weight:600;color:rgba(244,241,234,.55)}
.read-col h3{font-family:var(--head);font-weight:800;font-size:clamp(36px,4.5vw,60px);letter-spacing:-.04em;line-height:1;margin:6px 0 8px;color:var(--orange)}
.use-desc{color:rgba(244,241,234,.75);min-height:50px;margin-bottom:20px}
.range{display:grid;grid-template-columns:1fr auto;gap:8px;font-size:14px;font-weight:600;margin-bottom:16px}
.range output{color:var(--orange)}
.range input{grid-column:1/-1}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:4px;border-radius:4px;background:rgba(244,241,234,.25);outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--orange);border:3px solid var(--dark);box-shadow:0 0 0 2px var(--orange);cursor:pointer}
input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--orange);border:3px solid var(--dark);cursor:pointer}
.results{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0 14px}
.results div{background:#222;border-radius:16px;padding:14px 12px}
.results small{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:rgba(244,241,234,.5);font-weight:600}
.results b{font-family:var(--head);font-weight:800;font-size:clamp(18px,2vw,26px);letter-spacing:-.02em;white-space:nowrap}
.kwh{display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:600;gap:12px}
.kwh input{width:110px;background:#222;border:1px solid #333;border-radius:10px;padding:7px 10px;color:var(--paper);text-align:right;outline:none}
.kwh input:focus{border-color:var(--orange)}
.note{font-size:12px;color:rgba(244,241,234,.45);margin-top:10px}

/* Bloques */
.block{padding:120px 4vw 10px;max-width:1400px;margin:0 auto}
.head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:34px}
h2{font-family:var(--head);font-weight:800;font-size:clamp(40px,6.5vw,92px);line-height:.95;letter-spacing:-.05em;margin-top:20px}
.arrows{display:flex;gap:10px}
.arrows button{width:54px;height:54px;border-radius:50%;border:1.5px solid var(--ink);background:transparent;font-size:20px;transition:.2s}
.arrows button:hover{background:var(--ink);color:var(--paper)}

/* Carrusel */
.rail{
  display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4vw 30px;margin:0 -4vw;scrollbar-width:none;cursor:grab;
}
.rail::-webkit-scrollbar{display:none}
.rail.drag{cursor:grabbing;scroll-snap-type:none;user-select:none}
.model{
  flex:0 0 min(380px,82vw);scroll-snap-align:start;background:var(--paper);border-radius:28px;padding:22px;display:flex;flex-direction:column;
  border:1px solid var(--line);transition:transform .3s,box-shadow .3s;
}
.model:hover{transform:translateY(-6px);box-shadow:0 26px 50px -26px rgba(17,17,17,.45)}
.m-art{background:var(--c);border-radius:20px;height:240px;display:grid;place-items:center;position:relative;overflow:hidden}
.m-art svg{width:78%;max-width:240px;transition:transform .4s}
.model:hover .m-art svg{transform:rotate(-4deg) scale(1.05)}
.m-art em{position:absolute;top:12px;left:12px;font-style:normal;background:var(--ink);color:var(--paper);font-size:11px;font-weight:600;padding:3px 10px;border-radius:30px;text-transform:uppercase;letter-spacing:.08em}
.model h3{font-family:var(--head);font-weight:800;font-size:30px;letter-spacing:-.03em;margin:18px 0 4px}
.model .tag{color:var(--muted);font-size:14px}
.specs{list-style:none;margin:16px 0;border-top:1px solid var(--line)}
.specs li{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}
.specs span{color:var(--muted)}
.specs b{font-weight:600}
.m-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;gap:10px}
.price{font-family:var(--head);font-weight:800;font-size:30px;letter-spacing:-.04em}
.btn{background:var(--ink);color:var(--paper);border:0;border-radius:50px;padding:13px 26px;font-weight:600;transition:background .2s,transform .2s}
.btn:hover{background:var(--orange);transform:scale(1.04)}

/* Detalles */
.mid{margin-bottom:40px}
.feats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink)}
.feats article{padding:30px 24px 40px 0;border-right:1px solid var(--line);margin-right:24px;transition:.3s;position:relative}
.feats article:last-child{border:0;margin:0}
.feats i{font-style:normal;font-family:var(--head);font-weight:800;font-size:15px;color:var(--orange)}
.feats h3{font-family:var(--head);font-weight:800;font-size:26px;letter-spacing:-.03em;line-height:1.05;margin:60px 0 12px;transition:transform .3s}
.feats p{color:var(--muted);font-size:15px}
.feats article:hover h3{transform:translateX(8px)}

/* FAQ */
.faq{display:grid;grid-template-columns:1fr 1.2fr;gap:60px;align-items:start;padding-bottom:120px}
.acc details{border-bottom:1px solid var(--ink)}
.acc details:first-child{border-top:1px solid var(--ink)}
.acc summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;font-family:var(--head);font-weight:600;font-size:20px;letter-spacing:-.01em}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:"+";font-size:28px;font-weight:400;transition:transform .3s;color:var(--orange)}
.acc details[open] summary::after{transform:rotate(45deg)}
.acc p{padding:0 40px 24px 0;color:var(--muted);animation:fadeIn .4s}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}}

/* Footer */
footer{background:var(--ink);color:var(--paper);padding:60px 4vw 30px;overflow:hidden}
.foot-big{font-family:var(--head);font-weight:800;font-size:clamp(90px,26vw,420px);line-height:.8;letter-spacing:-.07em;color:var(--orange);margin-bottom:40px}
.foot-row{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap;font-size:14px;color:rgba(244,241,234,.65)}
.foot-row a{color:var(--paper);font-weight:600}

/* Modal */
dialog{border:0;border-radius:28px;padding:0;background:var(--paper);color:var(--ink);width:min(440px,92vw);margin:auto;box-shadow:0 40px 80px -20px rgba(0,0,0,.5)}
dialog::backdrop{background:rgba(17,17,17,.6);backdrop-filter:blur(4px)}
dialog[open]{animation:pop .3s}
@keyframes pop{from{opacity:0;transform:translateY(20px) scale(.96)}}
#orderForm{padding:32px;display:grid;gap:16px;position:relative}
#orderForm .small{color:var(--muted)}
#orderForm h3{font-family:var(--head);font-weight:800;font-size:34px;letter-spacing:-.04em;line-height:1}
#orderForm label{display:grid;gap:6px;font-size:13px;font-weight:600}
#orderForm input[type=text],#orderForm input[type=tel]{background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:12px 14px;outline:none;transition:.2s}
#orderForm input:focus{border-color:var(--ink)}
#orderForm input.error{border-color:#d9342b}
.x{position:absolute;top:18px;right:18px;width:36px;height:36px;border-radius:50%;border:1.5px solid var(--line);background:transparent}
.x:hover{background:var(--ink);color:var(--paper)}
.qty{display:flex;align-items:center;gap:14px}
.qty button{width:38px;height:38px;border-radius:50%;border:1.5px solid var(--ink);background:transparent;font-size:18px}
.qty button:hover{background:var(--ink);color:var(--paper)}
.qty output{font-family:var(--head);font-weight:800;font-size:22px;min-width:30px;text-align:center}
.msg{min-height:20px;font-size:14px;font-weight:600;text-align:center}
.msg.err{color:#d9342b}

/* Reveal */
.rv{opacity:0;transform:translateY(40px);transition:opacity .8s,transform .8s}
.rv.in{opacity:1;transform:none}

@media(max-width:1000px){
  .lab-card{grid-template-columns:1fr 1fr}
  .read-col{grid-column:1/-1}
  .feats{grid-template-columns:1fr 1fr}
  .feats article{border-right:0;margin:0;border-bottom:1px solid var(--line)}
  .faq{grid-template-columns:1fr}
}
@media(max-width:640px){
  .top{grid-template-columns:1fr auto}
  .top nav{display:none}
  .lab-card{grid-template-columns:1fr}
  .kettle-col #kettle{max-width:240px}
  .feats{grid-template-columns:1fr}
  .arrows{display:none}
}
@media(prefers-reduced-motion:reduce){
  .dot,.puff,.arrow-link span{animation:none}
  .rv{opacity:1;transform:none;transition:none}
}