/* Basic reset */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  color:#fff;
  font:500 16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  overflow-x:hidden;
  /* Mobile Safari address-bar-friendly viewport */
  min-height:calc(var(--vh, 1vh) * 100);
}

/* Adaptive background layer */
.bg{
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    radial-gradient(1100px 700px at 30% 20%, rgba(255,255,255,.09), transparent 55%),
    radial-gradient(900px 600px at 80% 30%, rgba(155,80,255,.10), transparent 60%),
    radial-gradient(900px 800px at 50% 90%, rgba(80,200,255,.08), transparent 55%),
    url("assets/background_4k.jpg");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  transform:translateZ(0);
}

/* Use portrait-optimized image on narrow screens (faster + better crop) */
@media (max-width: 700px){
  .bg{
    background-image:
      radial-gradient(900px 700px at 30% 15%, rgba(255,255,255,.10), transparent 55%),
      radial-gradient(800px 600px at 80% 25%, rgba(155,80,255,.12), transparent 60%),
      radial-gradient(900px 800px at 50% 85%, rgba(80,200,255,.10), transparent 55%),
      url("assets/bg-1080x1920.jpg");
  }
}

/* Soft vignette for readability */
body::before{
  content:"";
  position:fixed;
  inset:-2px;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(1200px 700px at 50% 20%, rgba(0,0,0,.35), transparent 60%),
    radial-gradient(1400px 900px at 50% 95%, rgba(0,0,0,.55), transparent 65%),
    linear-gradient(to bottom, rgba(0,0,0,.35), rgba(0,0,0,.25));
}

/* Layout */
.wrap{
  padding: max(18px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right))
           max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  min-height:calc(var(--vh, 1vh) * 100);
  display:grid;
  place-items:center;
}

.card{
  width:min(720px, 100%);
  border-radius:22px;
  padding:22px 18px;
  background:rgba(15, 14, 28, .55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:
    0 16px 70px rgba(0,0,0,.55),
    0 0 0 1px rgba(255,255,255,.04) inset;
}

.badge{
  display:inline-block;
  padding:6px 10px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.2px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.10);
}

h1{
  margin:12px 0 8px;
  font-size:clamp(22px, 3.2vw, 36px);
  line-height:1.1;
  text-shadow: 0 6px 22px rgba(0,0,0,.55);
}

p{margin:0 0 16px; color:rgba(255,255,255,.82)}
.mono{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;}

.actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.btn{
  appearance:none;
  border:1px solid rgba(255,255,255,.14);
  color:#fff;
  text-decoration:none;
  padding:12px 14px;
  border-radius:14px;
  background:rgba(255,255,255,.06);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover{
  transform: translateY(-1px);
  background:rgba(255,255,255,.09);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.btn:active{transform: translateY(0px) scale(.99);}

.btn.primary{
  border-color: rgba(170,120,255,.35);
  background:
    linear-gradient(135deg, rgba(170,120,255,.35), rgba(90,210,255,.18));
  box-shadow: 0 12px 35px rgba(120,100,255,.18);
}