:root{
  --ink:#0d1f14; --ink-2:#2c4a37; --muted:#5f7566;
  --g1:#7ab929; --g2:#2e8b3a; --g3:#0f5a2c;
  --bg:#ffffff; --tint:#f1f7ec; --dark:#0b2216;
  --r:18px;
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth}
body{font:17px/1.65 Inter,system-ui,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--g2)}
h1,h2,h3,h4{font-family:Sora,Inter,sans-serif;line-height:1.15;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(1.9rem,4.2vw,3.3rem);font-weight:700}
h1.h2,h2{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:700}
h3{font-size:1.15rem;font-weight:600;margin-bottom:.5rem}
.wrap{width:min(1120px,100% - 40px);margin-inline:auto}
.narrow{width:min(760px,100% - 40px)}
.muted{color:var(--muted)}
.lead{font-size:1.2rem;color:var(--ink-2)}
.eyebrow{font:600 .8rem/1 Sora,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--g2);margin-bottom:1rem}

/* cabecera */
.top{position:fixed;inset:0 0 auto 0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:10px max(20px,calc((100% - 1120px)/2));background:rgba(255,255,255,.92);backdrop-filter:blur(14px)}
.brand img{width:52px;height:auto}
.top nav{display:flex;align-items:center;gap:30px}
.top nav a{font:500 .95rem Inter,sans-serif;color:var(--ink);text-decoration:none;position:relative;padding:6px 0}
.top nav a:not(.cta)[aria-current]{color:var(--g2)}
.top nav a:not(.cta):hover{color:var(--g2)}
.cta{background:var(--ink);color:#fff!important;padding:10px 22px!important;border-radius:999px;transition:background .2s}
.cta:hover{background:var(--g2)}
.m,.burger{display:none}

/* hero */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;color:#fff;isolation:isolate;padding:120px 0 80px}
.hero.short{min-height:56vh}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:-2}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(100deg,rgba(6,24,14,.88) 0%,rgba(6,24,14,.62) 55%,rgba(6,24,14,.35) 100%)}
.hero h1{color:#fff;max-width:20em;font-size:clamp(1.8rem,3.6vw,3rem)}
.hero.short h1{max-width:22em}
.hero em{font-style:normal;color:var(--g1)}
.hero .eyebrow{color:var(--g1)}
.hero p{margin-top:2rem}
.btn{display:inline-block;background:var(--g1);color:var(--dark);font:600 .95rem Sora,sans-serif;padding:15px 30px;border-radius:999px;text-decoration:none;transition:transform .2s,background .2s}
.btn:hover{background:#fff;transform:translateY(-2px)}
.btn.dark{background:var(--ink);color:#fff}
.btn.dark:hover{background:var(--g2)}
.link{font-weight:600;text-decoration:none}

/* secciones */
.sec{padding:clamp(64px,9vw,120px) 0}
.sec.first{padding-top:clamp(120px,14vw,170px)}
.tint{background:var(--tint)}
.dark{background:var(--dark);color:#e8f3ea}
.dark h2,.dark h3{color:#fff}
.dark .eyebrow{color:var(--g1)}
.split{display:grid;grid-template-columns:1fr 1.3fr;gap:clamp(32px,6vw,90px);align-items:center}
.sec h2{margin-bottom:1.2rem}
.prose p+p{margin-top:1.1rem}
.photo img{border-radius:var(--r);width:100%;aspect-ratio:4/3;object-fit:cover}
.phone img{max-height:560px;width:auto;margin-inline:auto;border-radius:28px;box-shadow:0 30px 70px rgba(0,0,0,.35)}
.stat{background:var(--ink);color:#fff;border-radius:var(--r);padding:clamp(28px,4vw,48px);font:600 clamp(1.1rem,1.8vw,1.4rem)/1.5 Sora,sans-serif}

/* tarjetas */
.cards{display:grid;gap:22px;margin-top:2rem}
.cards.three{grid-template-columns:repeat(3,1fr)}
.cards.two{grid-template-columns:repeat(2,1fr)}
.cards.one{grid-template-columns:1fr;margin-top:0}
.card{background:#fff;border-radius:var(--r);padding:30px;box-shadow:0 1px 2px rgba(13,31,20,.06),0 12px 32px rgba(13,31,20,.06)}
.tint .card{box-shadow:0 12px 32px rgba(13,31,20,.07)}
.card p{color:var(--ink-2)}
.card p+p{margin-top:.4rem}
.card .ic{margin-bottom:1rem}
.card.price .n{font:700 2.8rem/1 Sora,sans-serif;color:var(--g2);margin-bottom:1rem}
.card.price small{font-size:1.1rem;color:var(--muted);font-weight:500}
.contact h2{margin-bottom:.6rem}
.contact a{font-weight:600}

/* hidrógeno */
.feats{display:grid;grid-template-columns:repeat(5,1fr);gap:28px}
.feat img{margin-bottom:1rem;width:56px;height:56px}
.feat p{font-size:.95rem;color:var(--ink-2)}

/* pasos */
.steps{list-style:none;padding:0;display:grid;gap:26px}
.steps li{display:flex;gap:20px}
.steps span{flex:none;width:42px;height:42px;border-radius:50%;background:var(--g1);color:var(--dark);display:grid;place-items:center;font:700 1rem Sora,sans-serif}
.steps p{color:var(--ink-2)}
.gp{margin-top:1.4rem;border-radius:8px;width:170px;height:auto}

/* legales */
.legal{padding:130px 0 80px}
.legal h1{font-size:2.2rem;margin-bottom:1.4rem}
.legal h2,.legal h3{font-size:1.25rem;margin:2.2rem 0 .8rem}
.legal h4{margin:1.4rem 0 .5rem}
.legal p,.legal li{margin-top:.9rem;color:var(--ink-2);font-size:.97rem}
.legal ul,.legal ol{padding-left:1.4rem}
.legal table{border-collapse:collapse;width:100%;margin:1.4rem 0;font-size:.9rem}
.legal td,.legal th{padding:10px 12px;text-align:left;background:var(--tint);vertical-align:top}
.legal th{background:var(--g2);color:#fff}

/* pie */
.foot{background:var(--dark);color:#b9cfc0;padding:70px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px}
.foot h4{color:#fff;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:1rem}
.foot a{color:#d7e8dc;text-decoration:none}
.foot a:hover{color:var(--g1)}
.foot p{font-size:.95rem}
.foot img{margin-bottom:1rem}
.soc{margin-top:1rem}.soc a{margin-right:16px}
.copy{margin-top:50px;padding-top:24px;font-size:.85rem;color:#7d9a87}

@media(max-width:900px){
  .split,.cards.three,.cards.two,.foot-grid{grid-template-columns:1fr}
  .feats{grid-template-columns:repeat(2,1fr)}
  .burger{display:block;width:44px;height:44px;cursor:pointer;position:relative}
  .burger span,.burger span::before,.burger span::after{position:absolute;left:10px;width:24px;height:2px;background:var(--ink);content:"";transition:.25s}
  .burger span{top:21px}.burger span::before{top:-7px;left:0}.burger span::after{top:7px;left:0}
  .top nav{position:fixed;inset:68px 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;background:#fff;padding:10px 24px 26px;transform:translateY(-130%);transition:transform .3s;max-height:calc(100vh - 68px)}
  .top nav a{padding:14px 0;width:100%;font-size:1.1rem}
  .cta{text-align:center;margin-top:12px}
  .m:checked~nav{transform:none}
  .m:checked~.burger span{background:transparent}
  .m:checked~.burger span::before{top:0;transform:rotate(45deg)}
  .m:checked~.burger span::after{top:0;transform:rotate(-45deg)}
  .phone img{max-height:440px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* ---- modernización ---- */
.top{transition:box-shadow .3s,background .3s}
.top.scrolled{box-shadow:0 8px 30px rgba(13,31,20,.08);background:rgba(255,255,255,.96)}
.lang{display:flex;gap:2px;background:var(--tint);border-radius:999px;padding:3px}
.top nav .lang a{font:600 .72rem/1 Sora,sans-serif;padding:7px 10px;border-radius:999px;letter-spacing:.06em;color:var(--ink-2)}
.top nav .lang a[aria-current]{background:var(--ink);color:#fff}
.hero{background:var(--dark)}
.hero::after{background:
  radial-gradient(60% 80% at 15% 100%,rgba(122,185,41,.28),transparent 60%),
  linear-gradient(100deg,rgba(6,24,14,.9) 0%,rgba(6,24,14,.6) 55%,rgba(6,24,14,.3) 100%)}
.hero h1{font-size:clamp(2rem,4.4vw,3.6rem);letter-spacing:-.03em}
.hero em{background:linear-gradient(90deg,var(--g1),#c4e86b);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-bg{transform:scale(1.06);animation:kb 22s ease-out forwards}
@keyframes kb{to{transform:scale(1)}}
.btn{box-shadow:0 10px 30px rgba(122,185,41,.35)}
.btn.dark{box-shadow:0 10px 30px rgba(13,31,20,.25)}
.card{border-radius:24px;transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 60px rgba(13,31,20,.12)}
.tint{background:linear-gradient(180deg,#f3f9ee,#eaf4e1)}
.dark{background:radial-gradient(70% 90% at 90% 0%,#15432a,var(--dark) 60%)}
.photo img,.stat{border-radius:28px}
.photo img{box-shadow:0 30px 70px rgba(13,31,20,.18)}
.feat{background:#fff;border-radius:24px;padding:26px;box-shadow:0 12px 32px rgba(13,31,20,.07);transition:transform .3s}
.feat:hover{transform:translateY(-6px)}
.stat{background:linear-gradient(135deg,var(--g3),var(--ink));position:relative;overflow:hidden}
.stat::after{content:"";position:absolute;right:-60px;top:-60px;width:200px;height:200px;border-radius:50%;background:rgba(122,185,41,.25);filter:blur(10px)}
.card.price .n{background:linear-gradient(90deg,var(--g3),var(--g1));-webkit-background-clip:text;background-clip:text;color:transparent}
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}
.card.rv.in:hover,.feat.rv.in:hover{transform:translateY(-6px)}
@media(max-width:900px){
  .lang{margin:10px 0}
  .top nav .lang a{width:auto;font-size:.8rem;padding:9px 14px}
  .feat{padding:20px}
}

/* selector de idioma neutro */
.lang{background:none;padding:0;gap:14px}
.top nav .lang a{padding:4px 0;border-radius:0;background:none!important;color:#8a8f8c;font-weight:500;letter-spacing:.08em}
.top nav .lang a:hover{color:var(--ink)}
.top nav .lang a[aria-current]{color:var(--ink);font-weight:700}
@media(max-width:900px){.top nav .lang a{padding:9px 0;font-size:.85rem}.lang{gap:20px}}