*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

body{
  max-width:680px;
  margin:0 auto;
  padding:40px 28px 28px;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:15px;
  line-height:1.6;
  color:#1a1a1a;
  background:#fff;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  -webkit-font-smoothing:antialiased;
}

main{flex:1}

/* ---- header ---- */
header{margin-bottom:32px}
h1{font-size:22px;font-weight:600;letter-spacing:-0.3px;color:#0d0d0d}
.subtitle{font-size:14px;color:#6b6b6b;margin-top:6px}

/* ---- card ---- */
.card{
  background:#f9f9f9;
  border:1px solid #ededed;
  border-radius:8px;
  padding:20px 24px;
  margin-bottom:12px;
}
.card h2{font-size:14px;font-weight:600;color:#0d0d0d;margin-bottom:10px}
.card-header{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.card-header h2{margin-bottom:0}

.badge{
  font-size:11px;
  font-weight:500;
  color:#6b6b6b;
  background:#eee;
  padding:2px 8px;
  border-radius:4px;
}

/* ---- price ---- */
.price{font-size:32px;font-weight:700;color:#0d0d0d;letter-spacing:-1px}
.price-unit{font-size:14px;font-weight:400;color:#8f8f8f;letter-spacing:0}

/* ---- button ---- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:36px;
  padding:0 20px;
  margin-top:14px;
  font-size:13px;
  font-weight:500;
  color:#fff;
  background:#0d0d0d;
  border:none;
  border-radius:6px;
  text-decoration:none;
  cursor:pointer;
  transition:background .15s;
}
.btn:hover{background:#333}

/* ---- feature list ---- */
.card ul{list-style:none}
.card li{
  padding:5px 0;
  font-size:14px;
  color:#444;
  display:flex;
  align-items:center;
  gap:8px;
}
.card li::before{
  content:"";
  display:inline-block;
  width:6px;height:6px;
  border-radius:50%;
  background:#0d0d0d;
  flex-shrink:0;
}

/* ---- muted text ---- */
.muted{font-size:14px;color:#6b6b6b}

/* ---- footer ---- */
footer{
  margin-top:28px;
  padding-top:16px;
  text-align:center;
  font-size:13px;
  color:#adadad;
}
footer a{color:#8f8f8f;text-decoration:none;transition:color .15s}
footer a:hover{color:#0d0d0d}
.dot{margin:0 6px}

/* ---- mobile ---- */
@media(max-width:480px){
  body{padding:24px 16px 20px}
  .card{padding:16px 18px}
}