:root{
  --plate:#ffd21f;--plate-d:#e0b400;--red:#ff4040;--amber:#ffb020;--green:#22d98f;--blue:#3aa0ff;
  --ink:#fbf9f2;--muted:#cfcabb;--asphalt:#0d0f12;--glass:rgba(12,13,16,.78);--glass-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.13);--radius:20px;--shadow:0 22px 55px rgba(0,0,0,.5);
  --mono:ui-monospace,"SFMono-Regular","Roboto Mono",Menlo,Consolas,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--asphalt);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.65;font-size:17px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--plate)}
h1,h2,h3,h4{line-height:1.15;letter-spacing:-.02em;margin-top:0}

/* Fondo fijo: muro de placas */
.bg{position:fixed;inset:-20px;z-index:-2;background:#0d0f12 url("fondo-placas.jpg") center/cover no-repeat;filter:blur(2px) saturate(1.15)}
@supports (background-image:url("x.webp")){.bg{background-image:url("fondo-placas.webp"),url("fondo-placas.jpg")}}
.shade{position:fixed;inset:0;z-index:-1;pointer-events:none;background:
  radial-gradient(1000px 600px at 80% 0%,rgba(255,210,31,.16),transparent 60%),
  radial-gradient(900px 700px at 0% 100%,rgba(255,64,64,.14),transparent 60%),
  linear-gradient(180deg,rgba(8,9,11,.68),rgba(8,9,11,.84))}

.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.notice{background:var(--plate);color:#1b1600;font-size:14px;font-weight:800;text-align:center;padding:8px 16px;border-bottom:3px solid #1b1600}

/* Barra de semáforo */
.lights{display:flex;gap:5px}
.lights i{width:10px;height:10px;border-radius:50%;background:#333;transition:.3s}
.lights i.r{background:var(--red);box-shadow:0 0 10px var(--red)}
.lights i.a{background:var(--amber);box-shadow:0 0 10px var(--amber)}
.lights i.g{background:var(--green);box-shadow:0 0 10px var(--green)}

header.nav{position:sticky;top:0;z-index:50;background:rgba(10,11,13,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:12px}
.logo{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;font-weight:900;font-size:19px}
.mini-plate{font-family:var(--mono);background:var(--plate);color:#111;border:2.5px solid #111;border-radius:7px;padding:2px 8px;font-size:14px;letter-spacing:.08em;box-shadow:0 0 0 2px var(--plate)}
.menu{display:flex;gap:2px}
.menu a{color:#f3f0e6;text-decoration:none;font-size:15px;padding:8px 12px;border-radius:999px;transition:.2s}
.menu a:hover{background:rgba(255,210,31,.16);color:#fff}
.burger{display:none;background:var(--glass-2);border:1px solid var(--line);color:#fff;border-radius:12px;width:42px;height:42px;font-size:18px;cursor:pointer}
@media (max-width:980px){
  .burger{display:block}
  .menu{position:absolute;top:70px;left:0;right:0;flex-direction:column;background:rgba(10,11,13,.97);border-bottom:1px solid var(--line);padding:10px 16px;display:none}
  .menu.open{display:flex}
}

/* Hero */
.hero{padding:70px 0 60px}
.hero .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr}.hero{padding-top:44px}}
.chip{display:inline-flex;align-items:center;gap:10px;background:rgba(255,210,31,.12);border:1px solid rgba(255,210,31,.45);color:var(--plate);font-weight:800;font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:clamp(38px,6.2vw,74px);margin:0 0 18px;color:#fff;text-shadow:0 6px 30px rgba(0,0,0,.6)}
.hero h1 em{font-style:normal;color:var(--plate)}
.hero p.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);margin:0 0 26px;max-width:620px}

/* Placa gigante interactiva */
.big-plate{display:inline-flex;flex-direction:column;align-items:center;background:linear-gradient(180deg,#ffe04d,var(--plate) 40%,var(--plate-d));color:#111;border:5px solid #111;border-radius:16px;padding:12px 26px 8px;box-shadow:0 0 0 5px var(--plate),0 25px 60px rgba(0,0,0,.6);position:relative;margin-bottom:22px;max-width:100%}
.big-plate .chars{display:flex;gap:6px;font-family:var(--mono);font-weight:900;font-size:clamp(40px,8vw,74px);line-height:1;letter-spacing:.02em}
.big-plate .chars span{display:inline-block;min-width:.62em;text-align:center}
.big-plate .chars .sep{min-width:.35em}
.big-plate .chars .last{color:#c40000;text-shadow:0 0 0 #000;position:relative}
.big-plate .chars .last::after{content:"";position:absolute;left:-4px;right:-4px;bottom:-8px;height:5px;border-radius:4px;background:#c40000}
.big-plate .city{font-weight:900;font-size:14px;letter-spacing:.3em;margin-top:8px}
.big-plate .bolt{position:absolute;top:9px;width:9px;height:9px;border-radius:50%;background:#7a6a00;box-shadow:inset 0 1px 2px rgba(0,0,0,.5)}
.big-plate .bolt.l{left:10px}.big-plate .bolt.r{right:10px}
.spin{animation:spin .12s linear infinite}
@keyframes spin{0%{transform:translateY(-6px);opacity:.4}100%{transform:translateY(6px);opacity:1}}
.plate-msg{min-height:56px;color:var(--muted);font-size:16px;margin-bottom:22px}
.plate-msg b{color:#fff}

.btn{display:inline-flex;align-items:center;gap:8px;font-weight:800;text-decoration:none;padding:14px 24px;border-radius:999px;border:0;cursor:pointer;font-size:16px;font-family:inherit;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn.yellow{background:var(--plate);color:#1b1600;box-shadow:0 10px 30px rgba(255,210,31,.35)}
.btn.green{background:var(--green);color:#03261a;box-shadow:0 10px 30px rgba(34,217,143,.3)}
.btn.red{background:var(--red);color:#fff;box-shadow:0 10px 30px rgba(255,64,64,.3)}
.btn.ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}

.hero-img{position:relative;max-width:380px;margin:0 auto;width:100%}
.hero-img .frame{border-radius:26px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow),0 0 70px rgba(255,64,64,.25)}
.hero-img img{aspect-ratio:3/4;object-fit:cover;width:100%;object-position:left center}
.hero-img .tag{position:absolute;right:-14px;top:22px;background:rgba(10,11,13,.9);border:1px solid var(--line);border-radius:14px;padding:10px 14px;font-weight:800;font-size:14px;box-shadow:var(--shadow);animation:bob 4s ease-in-out infinite}
.hero-img .tag.t2{top:auto;bottom:26px;left:-14px;right:auto;animation-delay:-2s}
@keyframes bob{50%{transform:translateY(-9px)}}
@media (max-width:520px){.hero-img .tag{right:4px}.hero-img .tag.t2{left:4px}}

section{padding:78px 0}
.kicker{display:inline-flex;align-items:center;gap:10px;font-weight:900;text-transform:uppercase;font-size:13px;letter-spacing:.14em;color:var(--plate)}
.kicker .n{font-family:var(--mono);background:var(--plate);color:#111;border-radius:6px;padding:1px 7px;letter-spacing:0}
.section-title{font-size:clamp(30px,4.6vw,48px);margin:10px 0 14px;color:#fff}
.lead{color:var(--muted);max-width:760px;font-size:18px}
.panel{background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--line);border-radius:28px;padding:clamp(22px,4vw,46px);box-shadow:var(--shadow)}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
@media (max-width:960px){.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g3,.g2{grid-template-columns:1fr}}
.card{background:rgba(12,13,16,.72);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .25s,border-color .25s}
.card:hover{transform:translateY(-4px);border-color:rgba(255,210,31,.55)}
.card h3{color:#fff;font-size:19px;margin:12px 0 8px}
.card p{color:var(--muted);margin:0;font-size:15.5px}
.ico{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;font-size:24px;background:rgba(255,210,31,.14);border:1px solid rgba(255,210,31,.35)}

.independent{display:grid;grid-template-columns:auto 1fr;gap:22px;border-color:rgba(255,210,31,.5)}
.independent .big{font-size:40px}
@media (max-width:600px){.independent{grid-template-columns:1fr}}

/* Anatomía de la placa */
.anat{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center}
@media (max-width:900px){.anat{grid-template-columns:1fr}}
.plate-lab{display:flex;flex-direction:column;align-items:center;gap:18px}
.demo-plate{position:relative;border:5px solid #111;border-radius:16px;padding:14px 22px 10px;box-shadow:0 20px 50px rgba(0,0,0,.55);transition:background .4s,color .4s;text-align:center;width:min(100%,430px)}
.demo-plate.yellow{background:linear-gradient(180deg,#ffe04d,var(--plate));color:#111}
.demo-plate.white{background:linear-gradient(180deg,#fff,#e9e9e9);color:#111}
.demo-plate.blue{background:linear-gradient(180deg,#2f6fd8,#1a4fae);color:#fff;border-color:#0b2a66}
.demo-plate .row{display:flex;justify-content:center;gap:10px;font-family:var(--mono);font-weight:900;font-size:clamp(40px,7vw,64px);line-height:1}
.hot{cursor:pointer;border-radius:8px;padding:0 6px;transition:background .2s,outline .2s;outline:3px dashed transparent;outline-offset:3px}
.hot:hover,.hot.on{outline-color:var(--red);background:rgba(255,64,64,.12)}
.demo-plate .city{display:inline-block;margin-top:8px;font-weight:900;letter-spacing:.28em;font-size:14px}
.seg{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.seg button{border:1.5px solid var(--line);background:var(--glass-2);color:#fff;padding:9px 16px;border-radius:999px;cursor:pointer;font-size:14px;font-weight:700;font-family:inherit}
.seg button.on{background:var(--plate);color:#111;border-color:var(--plate)}
.explain{border-left:4px solid var(--plate);background:rgba(255,255,255,.05);border-radius:0 16px 16px 0;padding:18px 20px;min-height:150px}
.explain h3{color:#fff;margin-bottom:6px}
.explain p{color:var(--muted);margin:0}
.hint{font-size:13px;color:var(--muted);text-align:center}

/* Simulador de vía */
.road-wrap{border-radius:20px;overflow:hidden;border:1px solid var(--line);background:#16181c}
canvas#road{width:100%;height:240px;display:block}
.sim-ctrl{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:18px;margin-top:20px;align-items:center}
@media (max-width:760px){.sim-ctrl{grid-template-columns:1fr}}
.sim-ctrl label{font-weight:800;display:flex;justify-content:space-between}
.sim-ctrl label span{color:var(--plate)}
input[type=range]{width:100%;accent-color:var(--plate);margin-top:8px}
.stat{background:var(--glass-2);border:1px solid var(--line);border-radius:16px;padding:14px 16px}
.stat small{color:var(--muted);display:block;font-size:13px}
.stat b{font-size:26px;color:#fff;font-family:var(--mono)}
.meter{height:8px;border-radius:8px;background:rgba(255,255,255,.1);overflow:hidden;margin-top:6px}
.meter i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--red),var(--amber),var(--green));transition:width .4s}
.disclaimer{font-size:13px;color:var(--muted)}

/* Fotos */
.split{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
@media (max-width:900px){.split{grid-template-columns:1fr}}
.photo{margin:0;position:relative;border-radius:24px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.photo img{width:100%;object-fit:cover;aspect-ratio:4/5;transition:transform 1.1s}
.photo:hover img{transform:scale(1.05)}
.photo figcaption{position:absolute;left:0;right:0;bottom:0;padding:44px 18px 14px;background:linear-gradient(transparent,rgba(0,0,0,.88));font-size:14px;color:#eee}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.duo .photo img{aspect-ratio:3/4.4}
.cities{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.cities span{font-family:var(--mono);font-weight:800;font-size:13px;background:var(--plate);color:#111;border:2px solid #111;border-radius:6px;padding:3px 9px;letter-spacing:.08em}
.facts{list-style:none;padding:0;margin:0}
.facts li{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.facts li b{color:#fff}
.facts .dot{flex:none;width:12px;height:12px;border-radius:50%;margin-top:7px}

/* Planificador */
.planner{display:grid;grid-template-columns:1fr 1fr;gap:26px}
@media (max-width:900px){.planner{grid-template-columns:1fr}}
.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:10px}
@media (max-width:480px){.modes{grid-template-columns:repeat(2,1fr)}}
.mode{border:2px solid var(--line);background:var(--glass-2);color:#fff;border-radius:16px;padding:14px 8px;cursor:pointer;text-align:center;font-family:inherit;font-weight:700;font-size:14px;transition:.2s}
.mode .e{font-size:28px;display:block;margin-bottom:4px}
.mode.on{border-color:var(--green);background:rgba(34,217,143,.14);transform:translateY(-3px)}
.result-box{display:flex;flex-direction:column;justify-content:center;gap:12px}
.big-num{font-family:var(--mono);font-size:clamp(44px,7vw,72px);font-weight:900;color:var(--green);line-height:1}
.tree-row{font-size:26px;letter-spacing:4px;min-height:38px}
.tip{background:rgba(255,210,31,.1);border:1px solid rgba(255,210,31,.35);border-radius:14px;padding:12px 14px;color:#f5eccb;font-size:15px}

/* Mitos y realidades */
.myth-stage{display:flex;flex-direction:column;align-items:center;gap:20px}
.myth-card{width:min(100%,560px);min-height:200px;border-radius:24px;padding:30px;background:linear-gradient(145deg,rgba(255,255,255,.1),rgba(255,255,255,.03));border:1px solid var(--line);box-shadow:var(--shadow);text-align:center;display:flex;flex-direction:column;justify-content:center;transition:transform .45s,opacity .45s,border-color .3s}
.myth-card .q{font-size:clamp(20px,2.6vw,26px);font-weight:800;color:#fff}
.myth-card .a{margin-top:14px;color:var(--muted);display:none}
.myth-card.ok{border-color:var(--green);box-shadow:0 0 40px rgba(34,217,143,.25)}
.myth-card.bad{border-color:var(--red);box-shadow:0 0 40px rgba(255,64,64,.25)}
.myth-card.out-l{transform:translateX(-60px) rotate(-6deg);opacity:0}
.myth-card.out-r{transform:translateX(60px) rotate(6deg);opacity:0}
.myth-btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.dots{display:flex;gap:6px}
.dots i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.2)}
.dots i.ok{background:var(--green)}.dots i.bad{background:var(--red)}.dots i.cur{outline:2px solid var(--plate);outline-offset:2px}

/* Mundo */
.world{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
@media (max-width:1000px){.world{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.world{grid-template-columns:1fr}}
.wcard{position:relative;border-radius:20px;padding:22px 18px;background:rgba(12,13,16,.75);border:1px solid var(--line);cursor:pointer;transition:.3s;overflow:hidden;min-height:210px}
.wcard .flag{font-size:34px}
.wcard h3{color:#fff;font-size:18px;margin:10px 0 2px}
.wcard .name{color:var(--plate);font-weight:800;font-size:14px}
.wcard .more{color:var(--muted);font-size:14.5px;margin-top:10px;max-height:0;overflow:hidden;transition:max-height .45s}
.wcard.on{border-color:var(--plate);background:rgba(30,26,6,.85)}
.wcard.on .more{max-height:260px}
.wcard .plus{position:absolute;top:14px;right:16px;color:var(--plate);font-size:22px;transition:.3s}
.wcard.on .plus{transform:rotate(45deg)}

/* Quiz semáforo */
.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.tl-big{display:flex;gap:8px;background:#111;border-radius:999px;padding:8px 12px;border:1px solid #333}
.tl-big i{width:22px;height:22px;border-radius:50%;background:#2a2a2a;transition:.3s}
.tl-big i.r{background:var(--red);box-shadow:0 0 16px var(--red)}
.tl-big i.a{background:var(--amber);box-shadow:0 0 16px var(--amber)}
.tl-big i.g{background:var(--green);box-shadow:0 0 16px var(--green)}
.q-opts{display:grid;gap:10px;margin-top:16px}
.q-opts button{text-align:left;border:1.5px solid var(--line);background:var(--glass-2);color:#fff;padding:14px 16px;border-radius:14px;cursor:pointer;font-size:16px;font-family:inherit;transition:.2s}
.q-opts button:hover:not(:disabled){border-color:var(--plate)}
.q-opts button.right{border-color:var(--green);background:rgba(34,217,143,.16)}
.q-opts button.wrong{border-color:var(--red);background:rgba(255,64,64,.16)}
.q-exp{margin-top:14px;color:var(--muted);display:none}
.q-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:18px;color:var(--muted)}
.road-progress{display:flex;gap:4px;flex:1;min-width:160px}
.road-progress i{flex:1;height:8px;border-radius:4px;background:rgba(255,255,255,.12)}
.road-progress i.ok{background:var(--green)}.road-progress i.bad{background:var(--red)}

details{background:rgba(12,13,16,.72);border:1px solid var(--line);border-radius:16px;padding:4px 22px;margin-bottom:10px}
details[open]{border-color:rgba(255,210,31,.5)}
summary{cursor:pointer;font-weight:800;padding:15px 0;list-style:none;display:flex;justify-content:space-between;gap:12px;color:#fff}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:24px;line-height:1;color:var(--plate);transition:.25s}
details[open] summary::after{transform:rotate(45deg)}
details p{color:var(--muted);margin:0 0 16px}

footer{background:rgba(8,9,11,.92);backdrop-filter:blur(10px);border-top:3px solid var(--plate);padding:56px 0 28px;font-size:15px;color:var(--muted);margin-top:40px}
footer h4{color:#fff;margin-bottom:12px}
footer a{color:var(--plate)}
.foot-grid{display:grid;grid-template-columns:2fr 1.4fr 1fr;gap:30px}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr}}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin-bottom:6px}
.foot-bottom{border-top:1px solid var(--line);margin-top:34px;padding-top:20px;font-size:13px}

.legal{max-width:860px;margin:50px auto 30px;padding:0 20px}
.legal h1{font-size:clamp(30px,5vw,46px);margin-bottom:6px;color:#fff}
.legal h2{font-size:21px;margin:34px 0 10px;color:var(--plate)}
.legal p,.legal li{color:#e8e4d8}
.legal .updated{color:var(--muted);font-size:14px}
.legal .box{background:var(--glass-2);border:1px solid var(--line);border-radius:16px;padding:18px 22px;margin:22px 0}
.legal .box.hl{border-color:rgba(255,210,31,.6)}
.toc{background:var(--glass-2);border:1px solid var(--line);border-radius:16px;padding:16px 22px}
.toc ol{margin:6px 0 0;padding-left:20px}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.hero-img .tag{animation:none}}
.progress{position:fixed;top:0;left:0;height:4px;width:0;background:linear-gradient(90deg,var(--red),var(--amber),var(--green));z-index:100}
.to-top{position:fixed;right:18px;bottom:18px;width:50px;height:50px;border-radius:14px;border:3px solid #111;background:var(--plate);color:#111;font-size:20px;font-weight:900;cursor:pointer;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s;z-index:60}
.to-top.show{opacity:1;pointer-events:auto}