:root{
  --navy:#0a2c66;
  --navy-deep:#06183b;
  --gold:#c9a45c;
  --soft:rgba(255,255,255,.78);
  --line:rgba(255,255,255,.16);
}
*{box-sizing:border-box;margin:0;padding:0}
html{background-color:#06183b;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  color:#fff;line-height:1.6;-webkit-font-smoothing:antialiased;
  min-height:100vh;display:flex;flex-direction:column;
  background:
    radial-gradient(900px 500px at 50% -10%, rgba(255,255,255,.10), transparent 60%),
    radial-gradient(1100px 700px at 50% 120%, rgba(201,164,92,.12), transparent 60%),
    linear-gradient(160deg, #0c3372 0%, var(--navy) 45%, var(--navy-deep) 100%);
  background-attachment:fixed;
  position:relative;overflow-x:hidden;
}
/* iOS Safari no soporta background-attachment:fixed correctamente */
@supports (-webkit-touch-callout:none){
  body{background-attachment:scroll;}
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(circle at 50% 40%, #000 30%, transparent 80%);
  -webkit-mask-image:radial-gradient(circle at 50% 40%, #000 30%, transparent 80%);
}
main{
  position:relative;z-index:1;flex:1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;
  padding:clamp(32px, 6vw, 56px) clamp(16px, 5vw, 40px);
  max-width:640px;margin:0 auto;width:100%;
}
.logo{
  width:clamp(140px, 38vw, 230px);
  height:auto;margin-bottom:clamp(20px, 4vw, 34px);
  filter:drop-shadow(0 8px 30px rgba(0,0,0,.35));
}
.lede{
  font-size:clamp(15px, 2.8vw, 20px);
  color:var(--soft);
  max-width:430px;margin:0 auto clamp(18px, 3vw, 26px);
}
.rule{
  width:54px;height:2px;background:var(--gold);
  border:0;margin:0 auto clamp(18px, 3vw, 26px);border-radius:2px;
}
.license{
  font-size:clamp(12.5px, 2vw, 13.5px);
  color:var(--soft);max-width:460px;margin:0 auto clamp(24px, 4vw, 36px);
  padding:clamp(10px, 2vw, 14px) clamp(14px, 3vw, 20px);
  border:1px solid var(--line);border-radius:12px;
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.btn{
  display:inline-block;text-decoration:none;font-weight:600;
  font-size:clamp(14px, 2vw, 15px);
  letter-spacing:.3px;
  padding:clamp(12px, 2vw, 14px) clamp(24px, 5vw, 34px);
  border-radius:10px;
  background:#fff;color:var(--navy);
  transition:transform .15s ease,box-shadow .2s ease;
  box-shadow:0 8px 24px rgba(0,0,0,.25);
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.32)}
.btn:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(0,0,0,.2)}
footer{
  position:relative;z-index:1;text-align:center;
  padding:clamp(14px, 2.5vw, 22px) clamp(16px, 4vw, 24px);
  font-size:clamp(11px, 1.8vw, 12.5px);
  color:rgba(255,255,255,.55);border-top:1px solid var(--line);
}
footer a{color:rgba(255,255,255,.7);text-decoration:none}
footer a:hover{color:#fff}

/* Tablet vertical (768px) */
@media(max-width:768px){
  body::before{background-size:36px 36px;}
}

/* Móvil (480px) */
@media(max-width:480px){
  footer{word-spacing:.5px;}
}

/* Pantallas muy pequeñas (320px) */
@media(max-width:340px){
  .logo{width:120px;}
  .btn{width:100%;text-align:center;}
}