@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;600;800&display=swap');
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background: #efefef;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.age-container {
  width: 900px;
  padding: 72px 48px;
}
.card {
  background: white;
  border-radius: 18px 18px 160px 18px;
  box-shadow: 0 30px 40px rgba(0,0,0,0.08);
  padding: 0;
  overflow: hidden;
  position: relative;
  margin: 0 auto;
  max-width: 920px;
}
form#age-form {
  background: transparent;
  border-radius: 18px 18px 0 0;
  padding: 28px 36px 6px 36px;
  box-shadow: none;
}
.result-card {
  background: transparent;
  box-shadow: none;
  margin-top: 0;
  padding: 28px 36px 44px 36px;
  border-radius: 0;
}
.input-group { display: inline-flex; flex-direction: column; margin-right: 6px; }
.input-row { display:flex; gap:22px; margin-bottom: 10px; justify-content: flex-start; }
label { font-size: 11px; letter-spacing: 2px; color: #6b6b6b; text-transform: uppercase; margin-left: 6px; }
input[type=number] {
  width: 110px;
  padding: 14px 12px;
  margin-top: 8px;
  border-radius: 8px;
  border: 1px solid #e6e6e6;
  font-weight: 800;
  font-size: 20px;
  background: #fff;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,0.02);
  text-align: center;
}
.round-btn {
  position: absolute;
  right: 40px;
  top: 160px;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: none;
  background: radial-gradient(circle at 30% 30%, #9f6dfb, #7c3aed);
  color: white;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(124,58,237,0.22);
  transform: translateY(0);
  z-index: 10;
}
.round-btn img { width: 40px; height: 40px; filter: invert(1) brightness(2); }
.divider { border: none; border-top: 1px solid #efefef; margin: 18px 0 6px 0; }
.results { padding: 6px 0 6px 8px; }
.result-line { display:flex; align-items: baseline; gap: 18px; margin-bottom: 8px; }
.result-line .value { color: #7c3aed; font-size: 92px; font-weight: 900; line-height: 0.85; margin-left: 4px; }
.result-line .unit { color: #0b0b0b; font-size: 84px; font-weight: 900; font-style: italic; }
.result-line + .result-line { margin-top: -12px; }
input.invalid { border-color: #ff5757; }
small.error { color: #ff5757; font-size: 12px; height: 16px; margin-top: 6px; display: block; }
.attribution { font-size: 11px; text-align: center; margin-top: 18px; color: #8a8a8a; }
.attribution a { color: hsl(228, 45%, 44%); }
@media (max-width: 880px) {
  .age-container { padding: 24px; width: 100%; }
  .result-line .value { font-size: 54px; }
  .result-line .unit { font-size: 40px; }
}