:root{
  --card:#ffffff;
  --text:#1f1f1f;
  --yes:#22c55e;
  --no:#ef4444;
  --border:#e9e9e9;
}

*{ box-sizing:border-box; }

body{
  margin:0;
  min-height:100vh;
  display:grid;
  place-items:center;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color:var(--text);
  background:#fff; /* white background */
}

.card{
  width:min(560px, 92vw);
  background:var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 24px 20px;
  text-align:center;
  box-shadow: 0 18px 50px #00000012;
  transform-origin: center;
}

h1{
  margin: 14px 0 10px;
  font-size: clamp(18px, 3.2vw, 28px);
  line-height: 1.2;
}

.subtitle{
  margin: 0 0 16px;
  opacity:.75;
}

.hint{
  margin: 14px 0 0;
  font-size: 14px;
  opacity:.7;
}

.gif-wrap{
  display:grid;
  place-items:center;
}

.gif-wrap img{
  width: min(360px, 82vw);
  border-radius: 18px;
  border: 1px solid var(--border);
}

.btn-row{
  display:flex;
  gap: 14px;
  justify-content:center;
  align-items:center;
  margin-top: 8px;
}

.btn{
  border:0;
  padding: 14px 18px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 16px;
  cursor:pointer;
  transition: transform .12s ease, filter .12s ease, opacity .15s ease;
  min-width: 120px;
}

.btn:active{ transform: scale(0.98); }
.btn:hover{ filter: brightness(1.03); transform: translateY(-1px); }

.yes{ background: var(--yes); color:white; }
.no{ background: var(--no); color:white; }

.card.shrink{
  transition: transform 160ms ease;
}