* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #0b1220;
  color: #eaf0ff;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

.header {
  margin-bottom: 18px;
}
.header h1 {
  margin: 0 0 6px 0;
  font-size: 28px;
}
.header p {
  margin: 0;
  opacity: 0.85;
}

.card {
  background: #121a2c;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.form .grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: 16px;
}

label span {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
}

input {
  width: 100%;
  padding: 12px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.12);
  background: #0b1220;
  color: #eaf0ff;
  outline: none;
}

input:focus {
  border-color: rgba(120, 170, 255, 0.7);
}

small {
  display: block;
  margin-top: 6px;
  opacity: 0.75;
}

.btn {
  width: 100%;
  padding: 12px 14px;
  border: 0;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  background: #3b82f6;
  color: #fff;
}

.btn:hover {
  filter: brightness(1.06);
}

.results {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.results h2 {
  margin: 0 0 12px 0;
  font-size: 18px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.10);
}

.result-row.total {
  border-bottom: 0;
  margin-top: 8px;
  padding-top: 14px;
  font-size: 20px;
  font-weight: 900;
}

.val {
  font-variant-numeric: tabular-nums;
}

.note {
  margin-top: 12px;
  opacity: 0.85;
}

.footer {
  margin-top: 16px;
  opacity: 0.7;
  font-size: 13px;
  text-align: center;
}