/* ============================================================
   WatioListo — Sistema de diseño
   Tema: ahorro y eficiencia energética del hogar (España)
   Pure CSS, sin librerías. Robusto y rápido.
   ============================================================ */

:root{
  --bg:#FBFAF6;
  --surface:#FFFFFF;
  --surface-2:#F4F6F2;
  --ink:#0E1A24;
  --ink-soft:#46606E;
  --line:rgba(14,26,36,.10);
  --line-2:rgba(14,26,36,.06);

  --brand:#0E8A5F;
  --brand-deep:#0B5C45;
  --brand-soft:#E4F4EC;
  --spark:#F4B53F;
  --spark-deep:#D8920F;
  --danger:#D2553F;

  --shadow-sm:0 1px 2px rgba(14,26,36,.06), 0 4px 12px rgba(14,26,36,.05);
  --shadow-md:0 10px 30px rgba(14,26,36,.10);
  --shadow-lg:0 30px 70px rgba(11,92,69,.18);

  --radius:18px;
  --radius-sm:12px;
  --maxw:1140px;

  --font-display:"Sora","Segoe UI",system-ui,-apple-system,sans-serif;
  --font-body:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  font-size:17px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.1;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(2.4rem,6vw,4.4rem)}
h2{font-size:clamp(1.9rem,4vw,3rem)}
h3{font-size:clamp(1.25rem,2.4vw,1.7rem)}
p{color:var(--ink-soft)}
strong{color:var(--ink);font-weight:600}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:clamp(64px,9vw,120px) 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-display);font-weight:600;font-size:.8rem;
  text-transform:uppercase;letter-spacing:.14em;color:var(--brand-deep);
  background:var(--brand-soft);padding:7px 14px;border-radius:100px;
}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);max-width:60ch}

/* ---------- Defensive split-text rule (gotcha A.4.5) ---------- */
.reveal[data-split]{opacity:1;transform:none}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}
.reveal.d2{transition-delay:.16s}
.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--font-display);font-weight:600;font-size:1rem;
  padding:15px 26px;border-radius:100px;border:1px solid transparent;
  cursor:pointer;transition:transform .25s ease,box-shadow .25s ease,background .2s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(14,138,95,.28)}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 16px 34px rgba(14,138,95,.34)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--surface);border-color:var(--brand);color:var(--brand-deep)}
.btn-spark{background:var(--spark);color:#3a2a05;box-shadow:0 10px 24px rgba(244,181,63,.35)}
.btn-spark:hover{background:var(--spark-deep);color:#3a2a05}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(160%) blur(14px);
  background:rgba(251,250,246,.82);
  border-bottom:1px solid transparent;
  transition:border-color .3s ease,box-shadow .3s ease,background .3s ease;
}
.nav.scrolled{border-color:var(--line);box-shadow:0 6px 24px rgba(14,26,36,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:1.25rem;letter-spacing:-.02em}
.brand .spark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff;box-shadow:0 6px 16px rgba(14,138,95,.35)}
.brand b{color:var(--spark-deep)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-weight:500;color:var(--ink-soft);font-size:.97rem;transition:color .2s ease}
.nav-links a:hover{color:var(--brand-deep)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto;border-radius:2px;transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;padding:clamp(54px,8vw,96px) 0 clamp(40px,6vw,72px);overflow:hidden}
.hero-mesh{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-mesh::before,.hero-mesh::after{content:"";position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;animation:float 16s ease-in-out infinite}
.hero-mesh::before{width:540px;height:540px;background:radial-gradient(circle at 30% 30%,#7fe3b8,transparent 70%);top:-160px;right:-120px}
.hero-mesh::after{width:460px;height:460px;background:radial-gradient(circle at 30% 30%,#ffe19a,transparent 70%);bottom:-180px;left:-120px;animation-delay:-6s}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-26px,22px) scale(1.06)}}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center}
.hero h1{margin:18px 0 0}
.hero h1 .hl{color:var(--brand-deep);position:relative;white-space:nowrap}
.hero h1 .hl::after{content:"";position:absolute;left:0;right:0;bottom:.08em;height:.28em;background:var(--spark);opacity:.45;border-radius:4px;z-index:-1}
.hero .lead{margin:22px 0 30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-trust{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap}
.hero-trust div{display:flex;flex-direction:column}
.hero-trust .num{font-family:var(--font-display);font-weight:800;font-size:1.7rem;color:var(--ink)}
.hero-trust .lbl{font-size:.85rem;color:var(--ink-soft)}

/* Hero visual card */
.hero-card{
  background:var(--surface);border:1px solid var(--line);border-radius:24px;
  box-shadow:var(--shadow-lg);padding:26px;position:relative;
}
.hero-card .hc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.hero-card .hc-top span{font-family:var(--font-display);font-weight:700}
.hero-card .pill{font-size:.72rem;font-weight:600;color:var(--brand-deep);background:var(--brand-soft);padding:5px 11px;border-radius:100px}
.bar-row{display:grid;grid-template-columns:90px 1fr 64px;align-items:center;gap:12px;margin:13px 0;font-size:.9rem}
.bar-row .nm{color:var(--ink-soft)}
.bar-track{height:11px;background:var(--surface-2);border-radius:100px;overflow:hidden}
.bar-fill{height:100%;border-radius:100px;background:linear-gradient(90deg,var(--brand),#48c594);transform-origin:left;animation:grow 1.2s cubic-bezier(.2,.8,.2,1) both}
.bar-fill.warm{background:linear-gradient(90deg,var(--spark-deep),var(--spark))}
.bar-row .vl{text-align:right;font-weight:700;font-family:var(--font-display);color:var(--ink)}
@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.hero-card .total{display:flex;align-items:baseline;justify-content:space-between;margin-top:20px;padding-top:18px;border-top:1px dashed var(--line)}
.hero-card .total b{font-family:var(--font-display);font-size:1.5rem;color:var(--brand-deep)}

/* ---------- Logos / trust strip ---------- */
.strip{border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);background:var(--surface)}
.strip-inner{display:flex;align-items:center;justify-content:center;gap:clamp(20px,5vw,60px);flex-wrap:wrap;padding:22px 0;color:var(--ink-soft);font-size:.92rem}
.strip-inner span{display:inline-flex;align-items:center;gap:9px;font-weight:500}

/* ---------- Feature cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow-sm);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(14,138,95,.3)}
.card .ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand-deep);margin-bottom:18px}
.card .ico.warm{background:#FDF1D6;color:var(--spark-deep)}
.card h3{margin-bottom:10px}
.card p{font-size:.98rem}

/* section heads */
.sec-head{max-width:680px;margin-bottom:48px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head h2{margin:16px 0 14px}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:s}
.step{position:relative;padding:30px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-18px;left:26px;width:42px;height:42px;display:grid;place-items:center;font-family:var(--font-display);font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-deep));border-radius:12px;box-shadow:0 8px 18px rgba(14,138,95,.32)}
.step h3{margin:14px 0 8px;font-size:1.2rem}
.step p{font-size:.95rem}

/* ---------- CTA band ---------- */
.cta-band{position:relative;border-radius:28px;overflow:hidden;background:linear-gradient(135deg,var(--brand-deep),#0f7350 55%,#127a55);color:#fff;padding:clamp(40px,6vw,68px);text-align:center}
.cta-band::after{content:"";position:absolute;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(244,181,63,.4),transparent 70%);top:-140px;right:-80px;filter:blur(30px)}
.cta-band h2{color:#fff;position:relative}
.cta-band p{color:rgba(255,255,255,.85);position:relative;max-width:54ch;margin:14px auto 28px}
.cta-band .btn-spark{position:relative}

/* ---------- Calculator ---------- */
.calc{display:grid;grid-template-columns:1.25fr .9fr;gap:30px;align-items:start}
.calc-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:26px}
.calc-panel h3{font-size:1.2rem;margin-bottom:6px}
.calc-sub{font-size:.92rem;color:var(--ink-soft);margin-bottom:18px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:7px;color:var(--ink)}
.field input,.field select{
  width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px;
  font-family:var(--font-body);font-size:1rem;background:var(--surface-2);color:var(--ink);transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(14,138,95,.12);background:#fff}
.row-3{display:grid;grid-template-columns:1fr 88px 96px 40px;gap:10px;align-items:end}
.appl-row{display:grid;grid-template-columns:1fr 78px 86px 40px;gap:10px;align-items:center;padding:11px 0;border-bottom:1px solid var(--line-2)}
.appl-row .a-name{font-weight:600;font-size:.93rem}
.appl-row .a-name small{display:block;font-weight:400;color:var(--ink-soft);font-size:.78rem}
.appl-row input{padding:9px 8px;text-align:center;font-size:.92rem}
.icon-btn{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2);cursor:pointer;display:grid;place-items:center;color:var(--ink-soft);transition:.2s}
.icon-btn:hover{border-color:var(--danger);color:var(--danger);background:#fff}
.add-row{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:14px}
.price-box{display:flex;align-items:center;gap:12px;background:var(--brand-soft);border-radius:12px;padding:12px 14px;margin-top:8px}
.price-box label{font-weight:600;font-size:.9rem;margin:0;flex:1}
.price-box input{width:100px;text-align:center}

/* results */
.result{position:sticky;top:96px;background:linear-gradient(160deg,#0e1a24,#13303f);color:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-lg)}
.result h3{color:#fff;font-size:1.1rem;margin-bottom:4px}
.result .r-sub{color:rgba(255,255,255,.6);font-size:.85rem;margin-bottom:22px}
.result .big{font-family:var(--font-display);font-weight:800;font-size:3rem;line-height:1;color:var(--spark);margin-bottom:4px}
.result .big-lbl{color:rgba(255,255,255,.7);font-size:.9rem;margin-bottom:22px}
.result .r-split{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:22px}
.result .r-split div{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:14px}
.result .r-split .n{font-family:var(--font-display);font-weight:700;font-size:1.3rem;color:#fff}
.result .r-split .l{font-size:.78rem;color:rgba(255,255,255,.65)}
.result .r-top{font-size:.85rem;color:rgba(255,255,255,.8);line-height:1.7}
.result .r-top b{color:var(--spark)}
.result-tips{margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12)}
.result-tips li{display:flex;gap:10px;font-size:.86rem;color:rgba(255,255,255,.85);margin-bottom:10px;line-height:1.5}
.result-tips li svg{flex-shrink:0;margin-top:3px;color:var(--spark)}
.result-tips a{color:var(--spark);text-decoration:underline;text-underline-offset:2px}

.disclaimer{font-size:.82rem;color:var(--ink-soft);background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:20px}

/* ---------- Article / guide ---------- */
.article{max-width:760px;margin:0 auto}
.article .meta{display:flex;gap:14px;align-items:center;color:var(--ink-soft);font-size:.88rem;margin:18px 0 30px;flex-wrap:wrap}
.article .meta .tag{background:var(--brand-soft);color:var(--brand-deep);padding:4px 12px;border-radius:100px;font-weight:600}
.article h2{margin:42px 0 16px;font-size:clamp(1.5rem,3vw,2rem)}
.article h3{margin:30px 0 12px}
.article p{margin-bottom:18px;font-size:1.06rem;color:#2c3e48}
.article ul.bul{margin:0 0 20px;padding-left:0}
.article ul.bul li{position:relative;padding-left:30px;margin-bottom:11px;color:#2c3e48}
.article ul.bul li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:4px;background:var(--brand-soft);border:2px solid var(--brand)}
.callout{background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:0 14px 14px 0;padding:20px 24px;margin:26px 0}
.callout p{margin:0;color:var(--brand-deep)}
.callout strong{color:var(--brand-deep)}

/* affiliate product card */
.prod{display:grid;grid-template-columns:96px 1fr auto;gap:20px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:22px 0;box-shadow:var(--shadow-sm);transition:.3s}
.prod:hover{box-shadow:var(--shadow-md);border-color:rgba(14,138,95,.3)}
.prod .pimg{width:96px;height:96px;border-radius:14px;background:var(--surface-2);display:grid;place-items:center;color:var(--brand)}
.prod h4{font-family:var(--font-display);font-size:1.15rem;margin-bottom:6px}
.prod .stars{color:var(--spark-deep);font-size:.9rem;margin-bottom:8px}
.prod p{font-size:.92rem;margin:0}
.prod .pact{display:flex;flex-direction:column;gap:8px;align-items:flex-end}
.prod .pbadge{font-size:.72rem;font-weight:700;color:var(--brand-deep);background:var(--brand-soft);padding:4px 10px;border-radius:100px;white-space:nowrap}

.aff-note{font-size:.82rem;color:var(--ink-soft);font-style:italic;background:var(--surface-2);border-radius:10px;padding:10px 14px;margin:18px 0}

.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;margin:0 0 34px;box-shadow:var(--shadow-sm)}
.toc strong{font-family:var(--font-display);display:block;margin-bottom:10px}
.toc a{display:block;color:var(--ink-soft);padding:5px 0;font-size:.96rem;transition:.2s}
.toc a:hover{color:var(--brand-deep);padding-left:6px}

/* ---------- FAQ ---------- */
.faq-item{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;background:var(--surface);overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:20px 24px;font-family:var(--font-display);font-weight:600;font-size:1.05rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--ink)}
.faq-q .chev{transition:transform .3s;flex-shrink:0;color:var(--brand)}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding-bottom:20px;font-size:.98rem}

/* ---------- Footer ---------- */
.footer{background:#0e1a24;color:rgba(255,255,255,.7);padding:64px 0 30px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;margin-bottom:44px}
.footer .brand{color:#fff;margin-bottom:14px}
.footer .brand b{color:var(--spark)}
.footer p{color:rgba(255,255,255,.6);font-size:.93rem;max-width:34ch}
.footer h5{font-family:var(--font-display);color:#fff;font-size:.95rem;margin-bottom:16px;text-transform:uppercase;letter-spacing:.08em}
.footer-grid a{display:block;color:rgba(255,255,255,.62);padding:6px 0;font-size:.93rem;transition:.2s}
.footer-grid a:hover{color:var(--spark)}
.footer-bot{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.84rem;color:rgba(255,255,255,.5)}
.footer-bot a{color:rgba(255,255,255,.5)}
.footer-bot a:hover{color:var(--spark)}

/* page hero (interior) */
.page-hero{padding:clamp(48px,7vw,86px) 0 clamp(20px,3vw,36px);position:relative;overflow:hidden}
.page-hero .hero-mesh::before{width:420px;height:420px;opacity:.4}
.page-hero .hero-mesh::after{width:360px;height:360px;opacity:.4}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:38px}
  .hero-card{max-width:480px}
  .grid-3,.steps{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .calc{grid-template-columns:1fr}
  .result{position:static}
}
@media(max-width:720px){
  body{font-size:16px}
  .nav-links,.nav-cta .btn-ghost{display:none}
  .nav-toggle{display:block}
  .nav.open .nav-links{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;background:var(--surface);padding:20px 24px;gap:6px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-md)}
  .nav.open .nav-links a{padding:12px 0;width:100%;border-bottom:1px solid var(--line-2)}
  .grid-3,.grid-2,.steps,.footer-grid,.r-split{grid-template-columns:1fr!important}
  .prod{grid-template-columns:64px 1fr;gap:14px}
  .prod .pimg{width:64px;height:64px}
  .prod .pact{grid-column:1/-1;flex-direction:row;align-items:center;justify-content:space-between}
  .hero-trust{gap:18px}
  .row-3,.appl-row{grid-template-columns:1fr 60px 70px 36px}
}

/* respeta reduced-motion solo para lo intrusivo (no micro-interacciones) */
@media(prefers-reduced-motion:reduce){
  .hero-mesh::before,.hero-mesh::after{animation:none}
  .hero-mesh{transform:none!important}
}

/* ============================================================
   MODO NOCHE  (detección automática + toggle manual)
   ============================================================ */

/* Transición suave al cambiar de modo */
html.theme-ready,
html.theme-ready body,
html.theme-ready .nav,
html.theme-ready .card,
html.theme-ready .prod,
html.theme-ready .step,
html.theme-ready .faq-item,
html.theme-ready .toc{
  transition:background-color .4s ease,color .4s ease,border-color .4s ease;
}

/* Variables del modo oscuro */
:root[data-theme="dark"]{
  --bg:#0A1117;
  --surface:#111E27;
  --surface-2:#18262F;
  --ink:#E8F1EF;
  --ink-soft:#9FB4BF;
  --line:rgba(255,255,255,.11);
  --line-2:rgba(255,255,255,.05);

  --brand:#22C088;
  --brand-deep:#5FE0AD;
  --brand-soft:rgba(34,192,136,.15);
  --spark:#F4B53F;
  --spark-deep:#FFCB5C;

  --shadow-sm:0 1px 2px rgba(0,0,0,.45), 0 6px 18px rgba(0,0,0,.35);
  --shadow-md:0 14px 40px rgba(0,0,0,.5);
  --shadow-lg:0 30px 70px rgba(0,0,0,.62);
}
/* Fallback sin JavaScript: respeta el sistema si no hay elección manual */
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0A1117; --surface:#111E27; --surface-2:#18262F;
    --ink:#E8F1EF; --ink-soft:#9FB4BF;
    --line:rgba(255,255,255,.11); --line-2:rgba(255,255,255,.05);
    --brand:#22C088; --brand-deep:#5FE0AD; --brand-soft:rgba(34,192,136,.15);
    --spark:#F4B53F; --spark-deep:#FFCB5C;
    --shadow-sm:0 1px 2px rgba(0,0,0,.45), 0 6px 18px rgba(0,0,0,.35);
    --shadow-md:0 14px 40px rgba(0,0,0,.5);
    --shadow-lg:0 30px 70px rgba(0,0,0,.62);
  }
}

/* Ajustes de elementos con color fijo en modo oscuro */
:root[data-theme="dark"] .nav{background:rgba(10,17,23,.72)}
:root[data-theme="dark"] .article p,
:root[data-theme="dark"] .article ul.bul li{color:#C3D2DA}
:root[data-theme="dark"] .field input:focus,
:root[data-theme="dark"] .field select:focus{background:var(--surface)}
:root[data-theme="dark"] .icon-btn:hover{background:var(--surface)}
:root[data-theme="dark"] .btn-primary:hover{background:var(--brand);filter:brightness(1.12)}
:root[data-theme="dark"] .footer{background:#0C1620}
:root[data-theme="dark"] .cta-band{background:linear-gradient(135deg,#0E8A5F,#0C5C45 60%,#0A4636)}
:root[data-theme="dark"] .hero h1 .hl{color:var(--brand-deep)}

/* ============================================================
   TOQUES FUTURISTAS  (ligeros, sin penalizar velocidad)
   ============================================================ */

/* Botón de modo claro/oscuro */
.theme-toggle{
  display:inline-grid;place-items:center;width:44px;height:44px;
  border-radius:12px;border:1px solid var(--line);background:var(--surface);
  color:var(--ink-soft);cursor:pointer;flex-shrink:0;
  transition:color .2s ease,border-color .2s ease,transform .2s ease,background .2s ease;
}
.theme-toggle:hover{color:var(--brand-deep);border-color:var(--brand);transform:translateY(-2px)}
.theme-toggle svg{width:20px;height:20px}
.theme-toggle .ic-sun{display:none}
.theme-toggle .ic-moon{display:block}
:root[data-theme="dark"] .theme-toggle .ic-sun{display:block}
:root[data-theme="dark"] .theme-toggle .ic-moon{display:none}

/* Parallax/zoom del fondo del hero (lo controla main.js) */
.hero-mesh{will-change:transform;transition:transform .1s linear}

/* Glow sutil al pasar el ratón (más marcado en oscuro = look futurista) */
.card:hover,.prod:hover{border-color:rgba(34,192,136,.5)}
:root[data-theme="dark"] .card:hover,
:root[data-theme="dark"] .prod:hover{
  border-color:var(--brand);
  box-shadow:0 0 0 1px rgba(34,192,136,.35), 0 18px 50px rgba(34,192,136,.14);
}
:root[data-theme="dark"] .btn-primary{box-shadow:0 8px 26px rgba(34,192,136,.30)}
:root[data-theme="dark"] .brand .spark{box-shadow:0 0 20px rgba(34,192,136,.45)}

/* Mesh un punto más vivo y con un tercer foco de luz */
.hero-mesh::before{opacity:.6}
:root[data-theme="dark"] .hero-mesh::before{background:radial-gradient(circle at 30% 30%,#1eff9f,transparent 70%);opacity:.28}
:root[data-theme="dark"] .hero-mesh::after{background:radial-gradient(circle at 30% 30%,#ffd36b,transparent 70%);opacity:.22}

/* En móvil el botón de tema se mantiene visible junto al menú */
@media(max-width:720px){
  .theme-toggle{width:42px;height:42px}
}