/* ============================================================
   Liceo BYS — CSS compartido de landings
   IDENTIDAD: NAVY oscuro + VERDE FLUOR (#24725B) + CELESTE FLUOR (#3E96B8)
   Header como el sitio original. Logo = isotipo + texto blanco (sin chip).
   ============================================================ */
:root{
  --bg:#07141d;          /* navy muy oscuro (base) */
  --bg-2:#0a1c28;
  --surface:#0e2130;     /* tarjeta navy */
  --ink:#eaf4f2;
  --muted:#9fb6b6;
  --muted-2:#6b8189;
  --line:rgba(120,200,220,.12);
  --green:#24725B;       /* verde esmeralda (sueter de Amparo) */
  --lima:#43A585;        /* esmeralda claro (acentos de texto) */
  --cyan:#3E96B8;        /* celeste sereno (familia del header original) */
  --navy-a:#114467;      /* azul header original (inicio) */
  --navy-b:#16607C;      /* azul header original (fin) */
  --green-soft:rgba(36,114,91,.12);
  --cyan-soft:rgba(62,150,184,.14);
  --navy:#0b2038;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
.serif{font-family:'Playfair Display',Georgia,serif}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* Botones */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:700;padding:15px 30px;border-radius:9999px;text-decoration:none;font-size:1.05rem;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s}
.btn-green{background:var(--green);color:#fff;box-shadow:0 8px 30px rgba(36,114,91,.35)}
.btn-green:hover{transform:translateY(-2px);box-shadow:0 14px 44px rgba(36,114,91,.55)}
.btn-cyan{background:linear-gradient(120deg,var(--navy-b),var(--cyan));color:#fff;box-shadow:0 8px 30px rgba(62,150,184,.35)}
.btn-cyan:hover{transform:translateY(-2px);box-shadow:0 14px 44px rgba(62,150,184,.55)}
.btn-ghost{background:transparent;color:var(--cyan);border:1px solid rgba(62,150,184,.5)}
.btn-ghost:hover{background:var(--cyan-soft);border-color:var(--cyan)}
.btn-sm{padding:9px 20px;font-size:.9rem}

/* Nav — como el header original: navy con toque celeste, logo isotipo + texto blanco */
nav.nav{position:sticky;top:0;z-index:50;background:linear-gradient(100deg,var(--navy-a) 0%,var(--navy-b) 100%);border-bottom:1px solid rgba(62,150,184,.25)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none}
.brand .brand-mark{height:44px;width:auto}
.brand .brand-txt{display:flex;flex-direction:column;line-height:1.1}
.brand .brand-txt b{font-family:'Playfair Display',serif;color:#fff;font-size:1.4rem;letter-spacing:1px;font-weight:800}
.brand .brand-txt em{font-style:normal;color:var(--cyan);font-size:.6rem;letter-spacing:2.5px;text-transform:uppercase;margin-top:2px}

/* VIDEO HORIZONTAL — a todo el ancho arriba */
.hero-video{width:100%;background:radial-gradient(70% 90% at 50% 45%,#0a1f2c 0%,#050e15 100%);aspect-ratio:16/9;max-height:560px;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);text-align:center;border-bottom:1px solid rgba(62,150,184,.18);overflow:hidden}
.hero-video::after{content:'';position:absolute;inset:0;background:radial-gradient(45% 60% at 42% 45%,rgba(36,114,91,.16),transparent 70%),radial-gradient(45% 60% at 62% 60%,rgba(62,150,184,.18),transparent 70%);pointer-events:none}
.hero-video .play{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,var(--green),var(--cyan));display:flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 10px 46px rgba(62,150,184,.45);position:relative;z-index:1}
.hero-video .play::after{content:'';border-left:24px solid #fff;border-top:15px solid transparent;border-bottom:15px solid transparent;margin-left:6px}
.hero-video small{position:relative;z-index:1;font-size:.86rem;letter-spacing:1px;text-transform:uppercase}
.hero-video video{width:100%;height:100%;object-fit:cover;position:relative;z-index:2;background:#000;display:block}

/* Hero (contenido bajo el video) */
.hero{padding:52px 0 40px;text-align:center}
.hero h1{font-size:3rem;line-height:1.1;font-weight:800;letter-spacing:-.5px;margin-bottom:20px;max-width:900px;margin-left:auto;margin-right:auto}
.hero h1 .accent{color:var(--lima);font-style:italic}
.hero h1 .accent-cy{color:var(--cyan);font-style:italic}
.hero .lead{font-size:1.2rem;color:var(--muted);margin-bottom:30px;max-width:620px;margin-left:auto;margin-right:auto}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}

/* Badge (celeste) */
.badge{display:inline-flex;align-items:center;gap:8px;background:var(--cyan-soft);color:var(--cyan);border:1px solid rgba(62,150,184,.35);padding:6px 16px;border-radius:9999px;font-size:.8rem;font-weight:700;letter-spacing:.5px;text-transform:uppercase;margin:0 auto 22px}

/* Íconos elegantes de línea (verde) */
.ico{width:56px;height:56px;border-radius:14px;background:var(--green-soft);border:1px solid rgba(36,114,91,.25);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.ico svg{width:28px;height:28px;stroke:var(--lima);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
/* alterna una tarjeta a celeste para balance */
.card:nth-child(2) .ico{background:var(--cyan-soft);border-color:rgba(62,150,184,.3)}
.card:nth-child(2) .ico svg{stroke:var(--cyan)}

/* Secciones */
section{padding:60px 0}
.eyebrow{text-align:center;color:var(--cyan);font-weight:700;letter-spacing:1.5px;text-transform:uppercase;font-size:.8rem;margin-bottom:10px}
h2.sec{font-size:2.3rem;font-weight:800;text-align:center;letter-spacing:-.5px;margin-bottom:14px}
.sub{text-align:center;color:var(--muted);max-width:640px;margin:0 auto 48px;font-size:1.06rem}

/* Tarjetas */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:32px 26px;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-6px);border-color:rgba(62,150,184,.45)}
.card h3{font-size:1.22rem;font-weight:700;margin-bottom:8px}
.card p{color:var(--muted);font-size:.97rem}

/* Historia (split) */
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:26px;padding:44px}
.split .foto{aspect-ratio:1;border-radius:18px;background:linear-gradient(135deg,#0b2038,#050e15);border:1px solid rgba(62,150,184,.2);display:flex;align-items:center;justify-content:center;color:var(--muted-2);text-align:center;font-size:.9rem;padding:20px}
.split h3{font-size:1.7rem;font-weight:800;margin-bottom:14px}
.split h3 .accent{color:var(--cyan)}
.split p{color:var(--muted);margin-bottom:12px}

/* Datos (alterna verde/celeste) */
.datos{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.dato{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px 16px;text-align:center}
.dato .n{font-size:1.8rem;font-weight:800;color:var(--lima);display:block;font-family:'Playfair Display',serif}
.dato:nth-child(even) .n{color:var(--cyan)}
.dato .t{font-size:.84rem;color:var(--muted);margin-top:4px}

/* Oferta (glow verde + celeste) */
.oferta{background:linear-gradient(135deg,#0b2030,#07141d);border:1px solid rgba(62,150,184,.25);border-radius:26px;padding:52px;text-align:center;position:relative;overflow:hidden}
.oferta::before{content:'';position:absolute;top:-40%;right:-8%;width:360px;height:360px;background:radial-gradient(circle,rgba(36,114,91,.22),transparent 70%)}
.oferta::after{content:'';position:absolute;bottom:-40%;left:-8%;width:340px;height:340px;background:radial-gradient(circle,rgba(62,150,184,.22),transparent 70%)}
.oferta h2{font-size:2.1rem;font-weight:800;margin-bottom:10px;position:relative}
.oferta p{color:var(--muted);font-size:1.08rem;margin-bottom:8px;position:relative}
.oferta .destacado{font-size:2.4rem;font-weight:900;margin:16px 0 26px;position:relative;font-family:'Playfair Display',serif;background:linear-gradient(120deg,var(--lima),var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* Formulario */
.form-box{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:44px;max-width:560px;margin:0 auto}
.form-box h2{text-align:center;font-size:1.7rem;font-weight:800;margin-bottom:8px}
.form-box .sub{margin-bottom:26px}
.form-box input{width:100%;padding:15px 16px;margin-bottom:14px;border-radius:12px;border:1px solid var(--line);background:var(--bg-2);color:var(--ink);font-size:1rem;font-family:inherit}
.form-box input::placeholder{color:var(--muted-2)}
.form-box input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(62,150,184,.15)}
.form-box button{width:100%;margin-top:4px}
#form-msg{text-align:center;margin-top:14px;font-weight:600}

/* Footer */
footer{background:#050e15;color:var(--muted);padding:44px 0;text-align:center;border-top:1px solid rgba(62,150,184,.15)}
.fbrand{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.fbrand img{height:40px}
.fbrand span{font-family:'Playfair Display',serif;color:#fff;font-size:1.2rem;letter-spacing:1px;font-weight:800}
footer .lema{color:var(--lima);font-weight:700;margin-bottom:10px;font-family:'Playfair Display',serif;font-size:1.05rem}
footer p{font-size:.88rem}

/* WhatsApp flotante */
.wa-float{position:fixed;bottom:24px;right:24px;background:#25D366;width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(37,211,102,.5);z-index:99;text-decoration:none;transition:transform .2s}
.wa-float svg{width:32px;height:32px;fill:#fff}
.wa-float:hover{transform:scale(1.08)}

@media(max-width:860px){
  .hero-video{aspect-ratio:16/9;max-height:none}
  .hero{padding:36px 0 24px}
  .hero h1{font-size:2.1rem}
  .brand .brand-txt em{display:none}
  .split{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .datos{grid-template-columns:repeat(2,1fr)}
  .split,.oferta,.form-box{padding:30px}
  h2.sec{font-size:1.8rem}
}

/* Chips de materias */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:780px;margin:0 auto}
.chip{background:var(--surface);border:1px solid var(--line);border-radius:9999px;padding:10px 20px;font-size:.92rem;color:var(--ink);font-weight:600}
.chip:nth-child(even){border-color:rgba(62,150,184,.3)}

/* Familia de policías */
.family{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.fam{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 24px}
.fam .rank{color:var(--cyan);font-weight:800;font-size:.74rem;text-transform:uppercase;letter-spacing:1.2px}
.fam h4{font-size:1.08rem;margin:3px 0 5px;font-weight:700}
.fam p{color:var(--muted);font-size:.92rem}

/* Ejemplos IA en clase */
.explain{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.ex{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 24px}
.ex .k{color:var(--lima);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}
.ex:nth-child(even) .k{color:var(--cyan)}
.ex p{color:var(--muted);font-size:.95rem}

@media(max-width:860px){.family,.explain{grid-template-columns:1fr}}