:root{
  --rojo:#e50914;
  --rojo-hover:#c40812;
  --fondo:#eef0f3;
  --tarjeta:#ffffff;
  --borde:#e3e5ea;
  --texto:#1b1c1f;
  --tenue2:#6c7078;
  --campo:#f6f7f9;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:radial-gradient(1000px 520px at 50% -10%, #ffffff 0%, var(--fondo) 70%);
  color:var(--texto);
  min-height:100vh;
  min-height:100dvh;
  display:flex;
  flex-direction:column;
  padding:20px;
}
.card{
  margin:auto;
  width:100%;max-width:440px;
  background:var(--tarjeta);
  border:1px solid var(--borde);
  border-radius:22px;
  padding:34px 28px;
  box-shadow:0 14px 40px rgba(20,20,45,.10);
}
/* Marca: ícono rojo + nombre en texto (se ve bien sobre blanco) */
.brand{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:8px}
.brand-icon{width:56px;height:56px;object-fit:contain}
.brand-name{font-size:27px;font-weight:800;letter-spacing:.3px;color:var(--texto)}
.brand-name b{color:var(--rojo);font-weight:800}
.badge{
  display:inline-block;margin:2px auto 0;padding:4px 12px;border-radius:999px;
  background:rgba(229,9,20,.08);border:1px solid rgba(229,9,20,.28);
  color:var(--rojo);font-size:11px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;
}
h1{font-size:24px;text-align:center;margin-top:16px;font-weight:800;letter-spacing:-.3px}
.sub{text-align:center;color:var(--tenue2);font-size:15px;margin-top:10px;line-height:1.5}
form{margin-top:26px}
label{display:block;font-size:13px;color:var(--tenue2);margin-bottom:8px;font-weight:600}
.field{position:relative;display:flex}
input[type=email]{
  flex:1;width:100%;
  background:var(--campo);
  border:1.5px solid var(--borde);
  color:var(--texto);
  padding:16px 46px 16px 18px; /* espacio a la derecha para la X */
  border-radius:14px;
  font-size:17px;
  outline:none;
  transition:border-color .15s, box-shadow .15s;
}
/* Botón "X" para borrar — minimalista, sin fondo. Se scopea con .field para
   ganar especificidad a los estilos globales de <button> (si no, se volvía rojo). */
.field .clear-btn{
  position:absolute;top:50%;right:12px;transform:translateY(-50%);
  width:26px;height:26px;min-width:0;margin:0;padding:0;
  display:flex;align-items:center;justify-content:center;
  background:transparent;color:#b3b8bf;
  border:none;border-radius:0;
  font-size:22px;font-weight:300;line-height:1;
  cursor:pointer;
}
.field .clear-btn:hover{background:transparent;color:#6c7078}
.field .clear-btn[hidden]{display:none}
input[type=email]::placeholder{color:#a6acb5}
input[type=email]:focus{border-color:var(--rojo);box-shadow:0 0 0 3px rgba(229,9,20,.12)}
button{
  width:100%;
  margin-top:16px;
  background:var(--rojo);
  color:#fff;border:none;
  padding:17px;
  border-radius:14px;
  font-size:17px;font-weight:800;
  cursor:pointer;
  transition:background .15s, transform .05s;
}
button:hover:not(:disabled){background:var(--rojo-hover)}
button:active:not(:disabled){transform:scale(.99)}
button:disabled{opacity:.6;cursor:not-allowed}
.spinner{
  display:inline-block;width:19px;height:19px;
  border:3px solid rgba(255,255,255,.5);
  border-top-color:#fff;border-radius:50%;
  animation:spin .7s linear infinite;vertical-align:middle;
}
@keyframes spin{to{transform:rotate(360deg)}}
#resultado{margin-top:24px}
.box{
  border-radius:16px;padding:20px;font-size:15px;line-height:1.55;
  border:1px solid var(--borde);background:#fbfcfd;
}
.box.ok{background:#edfaf1;border-color:#c5e9d2}
.box.warn{background:#fff6e6;border-color:#f2dca6}
.box.err{background:#fdeced;border-color:#f4c5c8}
.box h3{font-size:17px;margin-bottom:6px}
.box.ok h3{color:#127a38}
.box.warn h3{color:#9a6a10}
.box.err h3{color:#c0202a}
.box .meta{color:var(--tenue2);font-size:13.5px;margin-top:4px}
.cta{
  display:block;text-align:center;text-decoration:none;
  background:var(--rojo);color:#fff;font-weight:800;font-size:17px;
  padding:17px;border-radius:14px;margin-top:16px;
}
.cta:hover{background:var(--rojo-hover)}
.code{
  font-size:46px;font-weight:800;letter-spacing:10px;text-align:center;
  background:#f4f6f8;border:2px dashed #d3d7dd;border-radius:14px;
  padding:20px 10px;margin:16px 0 4px;color:#111;
  word-break:break-all;
}
.hint{color:var(--tenue2);font-size:13px;text-align:center;margin-top:20px;line-height:1.5}
.hidden{display:none}