:root{--grad-from:#31004d;--grad-to:#00bcd4;--accent:#ff2e9e;--text:#ffffff}
*{box-sizing:border-box;margin:0;padding:0}
body{
  display:flex;justify-content:center;align-items:center;min-height:100vh;
  background:radial-gradient(circle at 30% 30%,var(--grad-to),var(--grad-from));
  font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);
  padding:2rem;text-align:center;
}
.k4-big2-card{
  width:100%;max-width:20rem;background:rgba(0,0,0,.55);border-radius:1.6rem;
  padding:3.2rem 1.8rem 2.5rem;box-shadow:0 1.5rem 2.5rem rgba(0,0,0,.45);
  backdrop-filter:blur(7px);
}
.k4-big2-avatar{
  width:7rem;height:7rem;border-radius:50%;object-fit:cover;margin-top:-6rem;
  border:4px solid var(--accent);box-shadow:0 0 0 .25rem #000;margin-bottom:1.4rem;
}
h1{font-size:1.8rem;margin-bottom:.4rem}
.k4-big2-tagline{opacity:.85;margin-bottom:2rem;font-size:1rem}
.k4-big2-btn{
  display:inline-flex;justify-content:center;align-items:center;
  padding:1rem 2rem;border-radius:9999px;text-decoration:none;
  font-weight:600;font-size:1rem;transition:transform .15s;
  color:#fff;background:var(--accent);
  box-shadow:0 .5rem 1.2rem rgba(255,46,158,.45);
}
.k4-big2-btn:hover{transform:translateY(-4px)}