:root{
  --red:#F10104; --red-d:#8a0509; --red-dd:#3a0509;
  --bg:#0b0b0c; --bg2:#121214; --card:#18181b; --line:#2a2a2e;
  --tx:#fff; --mut:#b4b4ba; --wa:#25D366;
  --f-d:'Montserrat',system-ui,sans-serif; --f-b:'Inter',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{background:var(--bg);color:var(--tx);font-family:var(--f-b);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(1180px,92%);margin-inline:auto}
.narrow{width:min(820px,92%)}

h1,h2,h3{font-family:var(--f-d);font-weight:800;line-height:1.05;letter-spacing:-.01em}
h1{font-size:clamp(2.4rem,6vw,4.6rem);font-weight:900;text-transform:uppercase}
h1 em{font-style:normal;color:var(--red)}
h2{font-size:clamp(1.9rem,4vw,3rem);text-transform:uppercase;font-weight:900}
h3{font-size:1.15rem}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:#e6e6ea;max-width:34em}
.hero-copy .lead{margin-top:1.3rem}

/* etiqueta roja, como en la portada */
.tag{display:inline-block;background:var(--red);color:#fff;font-family:var(--f-d);font-weight:700;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;padding:.45em .9em;transform:skew(-8deg);margin-bottom:1.1rem}
.tag{box-shadow:0 6px 24px rgba(241,1,4,.35)}

/* botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;font-family:var(--f-d);font-weight:700;font-size:1rem;padding:.95em 1.6em;border-radius:999px;border:2px solid transparent;transition:transform .15s,background .2s,border-color .2s;cursor:pointer;text-align:center}
.btn:hover{transform:translateY(-2px)}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:#ff2a2d}
.btn-ghost{border-color:#ffffff66;color:#fff}
.btn-ghost:hover{border-color:#fff}
.btn-wa{background:var(--wa);color:#06260f}
.btn-wa:hover{background:#3ae07b}
.btn-sm{padding:.6em 1.2em;font-size:.9rem}
.btn-block{display:flex;width:100%}
.cta-row{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}

/* nav */
.nav{position:fixed;inset:0 0 auto 0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem clamp(1rem,4vw,3rem);transition:background .3s,box-shadow .3s}
.nav.scrolled{background:rgba(11,11,12,.92);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
.brand{background:#fff;border-radius:12px;padding:.35rem .8rem;display:block}
.brand img{height:34px;width:auto}
.nav-links{display:flex;gap:1.6rem;font-size:.92rem;font-weight:500;color:#dcdce0}
.nav-links a:hover{color:#fff}

/* hero */
.hero{position:relative;min-height:min(100svh,860px);display:flex;align-items:center;padding:7rem 0 4rem;overflow:hidden;background:linear-gradient(115deg,#0b0b0c 0%,#1a0507 45%,#6a0409 100%)}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(circle at 78% 40%,rgba(241,1,4,.38),transparent 55%),
  radial-gradient(#ffffff14 1px,transparent 1.5px) 0 0/22px 22px;opacity:.9}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:2rem;align-items:center}
.hero-art img{width:100%;height:auto;border-radius:22px;box-shadow:0 30px 80px rgba(0,0,0,.55);-webkit-mask-image:radial-gradient(ellipse 98% 98% at 50% 50%,#000 78%,transparent 100%);mask-image:radial-gradient(ellipse 98% 98% at 50% 50%,#000 78%,transparent 100%)}
.chips{display:flex;flex-wrap:wrap;gap:.6rem;list-style:none;margin-top:2rem}
.chips li{border:1px solid #ffffff44;border-radius:999px;padding:.35em 1em;font-size:.85rem;color:#f0f0f3;background:#ffffff0d}

/* secciones */
.sec{padding:clamp(4rem,9vw,7rem) 0}
.sec-dark{background:var(--bg2)}
.sec-head{max-width:46rem;margin-bottom:2.8rem}
.sec-head p{color:var(--mut);margin-top:1rem;font-size:1.08rem}

/* calculadora */
.sec-calc{background:linear-gradient(180deg,#0b0b0c,#140506 60%,#0b0b0c)}
.calc{display:grid;grid-template-columns:.85fr 1.15fr;gap:1.6rem;align-items:start}
.calc-in,.calc-out{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:clamp(1.4rem,3vw,2.2rem)}
.calc-in{position:sticky;top:90px}
.field{display:block;border:0;margin-bottom:1.6rem}
.field-l{display:block;font-family:var(--f-d);font-weight:700;margin-bottom:.6rem}
.money{display:flex;align-items:center;gap:.6rem;background:#0f0f11;border:1px solid var(--line);border-radius:14px;padding:.4rem 1rem}
.money span{font-family:var(--f-d);font-weight:800;color:var(--mut);font-size:1.2rem}
.money input{background:none;border:0;color:#fff;font:800 2.2rem var(--f-d);width:100%;outline:0}
input[type=number]{-moz-appearance:textfield}
input[type=number]::-webkit-inner-spin-button{opacity:.4}
.field>input[type=number]{width:100%;background:#0f0f11;border:1px solid var(--line);border-radius:12px;color:#fff;font:600 1.1rem var(--f-b);padding:.7rem 1rem}
input[type=range]{width:100%;margin-top:1rem;accent-color:var(--red);height:6px}
.scale{display:flex;justify-content:space-between;font-size:.78rem;color:var(--mut);margin-top:.3rem}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;text-align:center;padding:.7rem;border:1px solid var(--line);border-radius:12px;cursor:pointer;font-weight:600;transition:.15s;background:#0f0f11}
.seg input:checked+span{background:var(--red);border-color:var(--red)}
.seg input:focus-visible+span{outline:2px solid #fff}
.hint{font-size:.82rem;color:var(--mut);margin-top:.5rem}
.adv summary{cursor:pointer;color:var(--mut);font-weight:600;font-size:.92rem;margin-bottom:1rem}
.adv summary:hover{color:#fff}
.adv .field:last-child{margin-bottom:0}

.kpi-main{background:linear-gradient(120deg,var(--red-d),var(--red));border-radius:16px;padding:1.4rem 1.6rem;margin-bottom:1rem}
.kpi-main strong{display:block;font:900 clamp(2.2rem,5vw,3.4rem)/1.05 var(--f-d)}
.kpi-l{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.07em;font-weight:600;opacity:.82}
.kpi-s{display:block;font-size:.9rem;opacity:.9;margin-top:.3rem}
.kpis{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem;margin-bottom:1.4rem}
.kpis>div{background:#0f0f11;border:1px solid var(--line);border-radius:14px;padding:1rem 1.1rem}
.kpis strong{display:block;font:800 1.6rem/1.15 var(--f-d);margin-top:.15rem}
.kpis small{color:var(--mut);font-size:.8rem}
.chart{margin-bottom:1.4rem}
.chart figcaption{font-size:.85rem;color:var(--mut);margin-bottom:.5rem}
.legend{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.82rem;margin-top:.4rem}
.lg::before{content:"";display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:.45rem;vertical-align:-1px}
.lg-a::before{background:#8c8c93}
.lg-b::before{background:var(--red)}
.fine{font-size:.78rem;color:var(--mut);margin-top:1rem}
#chart text{fill:#9a9aa1;font:11px var(--f-b)}

/* pasos */
.steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:1rem;counter-reset:s}
.steps li{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:1.4rem 1.2rem;position:relative}
.steps .n{font:900 2.4rem var(--f-d);color:var(--red);display:block;line-height:1;margin-bottom:.8rem}
.steps h3{margin-bottom:.5rem}
.steps p{color:var(--mut);font-size:.92rem}
.kit{margin-top:2.4rem;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:1.6rem}
.kit h3{margin-bottom:1rem}
.kit ul{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.kit li b{display:block;font-family:var(--f-d);margin-bottom:.25rem}
.kit li span{color:var(--mut);font-size:.9rem}

/* video */
.video-grid{display:grid;grid-template-columns:1fr auto;gap:3rem;align-items:center}
.video-copy p{color:var(--mut);margin-top:1rem;max-width:30em}
.video-copy .btn{margin-top:1.8rem}
.video-box{width:min(340px,80vw);border-radius:24px;overflow:hidden;border:1px solid var(--line);box-shadow:0 30px 70px rgba(241,1,4,.18)}
.video-box video{width:100%;aspect-ratio:9/16;background:#000;object-fit:cover}

/* faq */
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:1rem;padding:1.25rem 0;font:700 1.08rem var(--f-d)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--red);font-size:1.6rem;line-height:1;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{color:var(--mut);padding:0 2rem 1.3rem 0}

/* tarjetas */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:1.8rem;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--red);transform:translateY(-3px)}
.card svg{width:44px;height:44px;stroke:var(--red);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;margin-bottom:1rem}
.card p{color:var(--mut);margin-top:.5rem}

/* cierre */
.sec-final{background:linear-gradient(115deg,#1a0507,#6a0409 70%,#a30509)}
.final-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:2.5rem;align-items:center}
.final-card{background:#0b0b0ccc;border:1px solid #ffffff22;border-radius:22px;padding:1.8rem}
.final-card ol{margin:1rem 0 1.4rem 1.2rem;color:#e6e6ea}
.final-card li{margin-bottom:.4rem}
.fb{color:#fff;font-weight:600;border-bottom:1px solid #ffffff66}
.fb:hover{border-color:#fff}

.foot{background:#070708;padding:2.4rem 0;color:var(--mut);font-size:.92rem}
.foot-in{display:flex;flex-wrap:wrap;align-items:center;gap:1.2rem 2rem;justify-content:space-between}
.foot-logo{height:34px;width:auto;background:#fff;border-radius:10px;padding:.3rem .7rem}
.small{font-size:.8rem}

.wa-float{position:fixed;right:18px;bottom:18px;width:58px;height:58px;border-radius:50%;background:var(--wa);display:grid;place-items:center;z-index:60;box-shadow:0 8px 28px rgba(0,0,0,.5);transition:transform .15s}
.wa-float:hover{transform:scale(1.07)}
.wa-float svg{width:30px;height:30px;fill:#fff}

/* aparición */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s,transform .6s}
.rv.in{opacity:1;transform:none}

@media (max-width:980px){
  .nav-links{display:none}
  .hero-grid,.calc,.video-grid,.final-grid{grid-template-columns:1fr}
  .calc-in{position:static}
  .hero{padding-top:6rem}
  .steps{grid-template-columns:1fr 1fr}
  .kit ul{grid-template-columns:1fr 1fr}
  .cards{grid-template-columns:1fr}
  .video-box{margin-inline:auto}
}
@media (max-width:560px){
  .steps{grid-template-columns:1fr}
  .kit ul{grid-template-columns:1fr}
  .kpis{grid-template-columns:1fr 1fr}
  .kpis strong{font-size:1.3rem}
  .cta-row .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.rv{opacity:1;transform:none}}