*{box-sizing:border-box}
body{margin:0;font-family:var(--fuente),system-ui,sans-serif;color:var(--txt);background:#fff}

.split{display:flex;min-height:100vh}

/* ---- panel azul ---- */
.lado-azul{flex:1;position:relative;overflow:hidden;color:#fff;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(160deg,#083a80 0,var(--c1) 45%,var(--c2) 100%);padding:3rem 2rem}
.lado-azul::before{content:"";position:absolute;top:-120px;right:-140px;width:420px;height:420px;border-radius:50%;
  border:60px solid rgba(255,255,255,.06)}
.lado-azul::after{content:"";position:absolute;bottom:-160px;left:-120px;width:380px;height:380px;border-radius:50%;
  border:50px solid rgba(255,255,255,.06)}
.lado-in{position:relative;z-index:1;max-width:430px;text-align:center}
.logo{height:130px;margin-bottom:1.5rem}
.lado-in h1{margin:0;font-size:2.1rem;font-weight:800;line-height:1.2}
.lado-in h1 span{color:var(--c3)}
.lado-in hr{width:64px;height:3px;border:0;background:var(--c3);margin:1.7rem auto}
.lado-in p{margin:0;font-size:1.05rem;line-height:1.6;opacity:.92}
.lado-in h2{font-size:.95rem;letter-spacing:.12em;text-transform:uppercase;margin:0 0 1.2rem;opacity:.9}
.pasos{list-style:none;margin:0;padding:0;text-align:left}
.pasos li{display:flex;align-items:center;gap:.9rem;margin-bottom:.9rem}
.pasos b{flex:0 0 38px;height:38px;border-radius:50%;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  color:var(--c3);display:flex;align-items:center;justify-content:center}

/* ---- lado del formulario ---- */
.lado-blanco{flex:1;background:#f6f9fd;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem 1.5rem}
.tarjeta-login{width:100%;max-width:460px;background:#fff;border-radius:22px;padding:2.6rem 2.4rem;
  box-shadow:0 10px 40px rgba(5,74,155,.12)}
.tarjeta-login h2{margin:0;font-size:1.9rem;font-weight:800;color:#0f172a}
.sub{margin:.4rem 0 1.6rem;color:#6b7280}

label{display:block;font-weight:600;font-size:.9rem;margin:1.1rem 0 .45rem;color:#0f172a}
.campo{position:relative}
.campo svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:20px;height:20px;stroke:#9aa5b8;fill:none;stroke-width:1.7;pointer-events:none}
.campo input{width:100%;padding:.95rem 2.8rem .95rem 2.9rem;font:inherit;font-size:1rem;background:#f8fafd;
  border:1.5px solid #e2e8f2;border-radius:12px;transition:.15s}
.campo input:focus{outline:0;background:#fff;border-color:var(--c1);box-shadow:0 0 0 4px rgba(5,74,155,.12)}
.ojo{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:0;padding:6px;cursor:pointer;display:flex}
.ojo svg{position:static;transform:none;stroke:#9aa5b8}
.ojo:hover svg{stroke:var(--c1)}

.btn{display:flex;align-items:center;justify-content:center;gap:.6rem;width:100%;margin-top:1.7rem;padding:1rem;
  font:inherit;font-size:1.05rem;font-weight:700;color:#fff;background:var(--c1);border:0;border-radius:12px;cursor:pointer;
  box-shadow:0 8px 20px rgba(5,74,155,.28);transition:.15s}
.btn:hover{transform:translateY(-2px);filter:brightness(1.1)}

.alerta{padding:.8rem 1rem;border-radius:12px;margin-bottom:.5rem;background:#fde8e6;color:#b42318;font-weight:600;font-size:.9rem;
  border-left:4px solid #d92d20}
.alerta.ok{background:#d1f2dc;color:#0b6b2d;border-left-color:#16a34a}
.nota{margin:1.6rem 0 0;padding-top:1.3rem;border-top:1px solid #e8edf5;text-align:center;font-size:.88rem;color:#6b7280}

.pie{margin-top:1.5rem;color:#8a94a6;font-size:.78rem;text-align:center;max-width:460px}

/* ---- móvil ---- */
@media(max-width:900px){
  .split{flex-direction:column}
  .lado-azul{flex:none;padding:2rem 1.5rem}
  .logo{height:80px;margin-bottom:1rem}
  .lado-in h1{font-size:1.5rem}
  .lado-in hr,.lado-in h2,.pasos{display:none}
  .lado-in p{font-size:.9rem}
  .tarjeta-login{padding:2rem 1.5rem}
}