/* =====================
   GLOBAL RESET
===================== */
*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

body{
  min-height:100vh;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont;
  background:
    radial-gradient(circle at top,#1e293b,#020617 60%);
  color:#e5e7eb;
  display:flex;
  justify-content:center;
  align-items:center;
  padding:16px;
}

.price-box{
  margin-top:16px;
  padding:14px;
  border-radius:14px;
  background:#020617;
  border:1px solid #1e293b;
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.price-box span{
  font-size:.9rem;
  color:#94a3b8;
}

.price-box strong{
  font-size:1.1rem;
  font-weight:800;
  color:#22d3ee;
}

/* =====================
   CARD CONTAINER
===================== */
.card{
  width:100%;
  max-width:420px;
  background:linear-gradient(180deg,#020617,#0f172a);
  padding:26px 24px;
  border-radius:20px;
  box-shadow:
    0 20px 50px rgba(0,0,0,.55),
    inset 0 0 0 1px rgba(255,255,255,.04);
  animation:fadeUp .6s ease;
}

/* =====================
   TITLE
===================== */
.card h2,
.card h3{
  font-size:1.35rem;
  font-weight:700;
  text-align:center;
  margin-bottom:14px;
  letter-spacing:.3px;
}

.card p{
  text-align:center;
  font-size:.9rem;
  color:#94a3b8;
  margin-top:6px;
}

/* =====================
   FORM ELEMENT
===================== */
input,
select{
  width:100%;
  padding:13px 14px;
  margin-top:14px;
  border-radius:12px;
  background:#020617;
  border:1px solid #1e293b;
  color:#fff;
  font-size:.95rem;
  transition:.25s ease;
}

input::placeholder{
  color:#64748b;
}

input:focus,
select:focus{
  outline:none;
  border-color:#6366f1;
  box-shadow:0 0 0 3px rgba(99,102,241,.15);
}

/* =====================
   BUTTON
===================== */
button{
  width:100%;
  margin-top:18px;
  padding:14px;
  border-radius:14px;
  border:none;
  font-size:1rem;
  font-weight:700;
  color:#fff;
  cursor:pointer;
  background:
    linear-gradient(135deg,#6366f1,#22d3ee);
  box-shadow:
    0 10px 30px rgba(34,211,238,.35);
  transition:.25s ease;
}

button:hover{
  transform:translateY(-2px);
  box-shadow:
    0 16px 40px rgba(34,211,238,.45);
}

button:active{
  transform:scale(.98);
}

/* =====================
   QR BOX
===================== */
#qrcode{
  margin:18px auto;
  padding:14px;
  background:#fff;
  border-radius:14px;
  width:max-content;
}

/* =====================
   ANIMATION
===================== */
@keyframes fadeUp{
  from{
    opacity:0;
    transform:translateY(15px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}

/* =====================
   MOBILE SMALL DEVICE
===================== */
@media (max-width:360px){
  .card{
    padding:20px;
  }
  .card h2{
    font-size:1.2rem;
  }
}

/* =====================
   DESKTOP ENHANCEMENT
===================== */
@media (min-width:768px){
  body{
    background:
      radial-gradient(circle at top left,#1e293b,#020617 55%);
  }
}