.page-beton {
  max-width: 620px;
  margin: 0 auto;
}

.page-beton .hero {
  margin-bottom: 18px;
}

.page-beton .card-calculator {
  padding: 22px;
}

.page-beton .calc-grid {
  display: grid;
  gap: 14px;
}

.page-beton label {
  font-size: 14px;
  margin-bottom: 4px;
  color: #475569;
}

.page-beton input {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #d0d7e2;
  background: #f8fafc;
}

.page-beton input:focus {
  border-color: #3b82f6;
  background: #ffffff;
  outline: none;
}

.page-beton .result-box {
  margin-top: 18px;
  padding: 20px;
  border-radius: 12px;
  background: linear-gradient(135deg, #eef2f7, #e2e8f0);
  text-align: center;
}

.page-beton #result-volume {
  font-size: 22px;
  font-weight: 700;
}