/* Reset & base */
* { box-sizing: border-box; }
body {
  font-family: 'Segoe UI', Tahoma, sans-serif;
  margin: 0;
  background: #f2f6fb;
  color: #222;
  -webkit-font-smoothing: antialiased;
}
.container {
  max-width: 520px;
  margin: 18px auto;
  padding: 18px;
}
.card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 8px 28px rgba(8,35,64,0.06);
}
h2 { color: #0d47a1; margin: 0 0 10px 0; font-weight: 700; }
h3 { color: #1565c0; margin: 10px 0; font-weight: 600; }

/* Fields */
.field { margin-top: 12px; }
label { display:block; font-size:0.95rem; color:#444; margin-bottom:6px; }

select, input[type="number"] {
  width:100%;
  padding:10px 12px;
  border-radius:10px;
  border:1.25px solid #d7e9ff;
  font-size:1rem;
  outline:none;
}
select:focus, input[type="number"]:focus { border-color:#1976d2; }

/* Add area inputs */
.input-row { display:flex; gap:10px; margin-top:8px; }
.input-col { flex:1; min-width:0; }

/* Buttons */
.controls { display:flex; gap:10px; margin-top:10px; }
.btn { border:none; border-radius:10px; padding:10px; font-weight:700; cursor:pointer; color:white; }
.btn-primary { background:#1976d2; }
.btn-primary:hover { background:#1565c0; }
.btn-neutral { background:#9e9e9e; }
.btn-neutral:hover { background:#616161; }
.btn-danger { background:#e53935; padding:8px 10px; }

/* List */
.list { list-style:none; padding:0; margin:0; }
.list li {
  background:#eaf4ff;
  border-radius:10px;
  padding:10px;
  margin-bottom:8px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  font-weight:600;
}
.wall-meta { color:#0d47a1; }

/* Output */
.result-wrapper { margin-top:14px; }
.output {
  margin-top:8px;
  border-radius:12px;
  padding:12px;
  background: linear-gradient(180deg,#1565c0,#0d47a1);
  color:white;
  text-align:center;
  font-weight:700;
  box-shadow:0 8px 20px rgba(13,71,161,0.18);
}

/* Note */
.note {
  margin-top:12px;
  background:#fffbe6;
  padding:10px;
  border-radius:8px;
  color:#5d4037;
  font-size:0.95rem;
  line-height:1.4;
}

/* Responsive */
@media (max-width:420px){
  .input-row { flex-direction:column; }
  .controls { flex-direction:column; }
}