.burnbills-calculator {
  font-family: Arial, sans-serif;
  max-width: 980px;
  margin: 0 auto;
  padding: 30px 20px;
  color: #1f2937;
}

.burnbills-calculator .bb-hero {
  text-align: center;
  margin-bottom: 30px;
}

.burnbills-calculator h1 {
  font-size: 36px;
  margin-bottom: 10px;
  color: #111827;
  line-height: 1.2;
}

.burnbills-calculator .bb-subtitle {
  font-size: 18px;
  color: #4b5563;
  max-width: 730px;
  margin: 0 auto;
  line-height: 1.5;
}

.burnbills-calculator .bb-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  padding: 28px;
  margin-bottom: 28px;
}

.burnbills-calculator .bb-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.burnbills-calculator label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
  color: #111827;
}

.burnbills-calculator input {
  width: 100%;
  padding: 14px 14px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 16px;
  box-sizing: border-box;
  background: #ffffff;
  color: #111827;
}

.burnbills-calculator input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.burnbills-calculator .bb-help {
  font-size: 13px;
  color: #6b7280;
  margin-top: 6px;
  line-height: 1.4;
}

.burnbills-calculator button,
.burnbills-calculator .bb-calculate-button {
  width: 100%;
  margin-top: 24px;
  padding: 16px 20px;
  font-size: 18px;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  background: #ef4444;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
}

.burnbills-calculator button:hover,
.burnbills-calculator .bb-calculate-button:hover {
  background: #dc2626;
  transform: translateY(-1px);
}

.burnbills-calculator .bb-results {
  display: none;
}

.burnbills-calculator .bb-results h2 {
  margin-top: 0;
  color: #111827;
}

.burnbills-calculator .bb-results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.burnbills-calculator .bb-result-box {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 20px;
  text-align: center;
}

.burnbills-calculator .bb-result-label {
  font-size: 14px;
  color: #6b7280;
  margin-bottom: 8px;
  line-height: 1.3;
}

.burnbills-calculator .bb-result-value {
  font-size: 24px;
  font-weight: 800;
  color: #111827;
  line-height: 1.2;
}

.burnbills-calculator .bb-highlight {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
}

.burnbills-calculator .bb-highlight .bb-result-value {
  color: #047857;
}

.burnbills-calculator .bb-warning {
  display: none;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
  padding: 16px;
  border-radius: 12px;
  margin-top: 18px;
  line-height: 1.5;
  font-weight: 600;
}

.burnbills-calculator .bb-summary {
  font-size: 17px;
  line-height: 1.6;
  color: #374151;
  margin-top: 22px;
  background: #f3f4f6;
  padding: 18px;
  border-radius: 12px;
}

.burnbills-calculator .bb-next-steps {
  line-height: 1.7;
  color: #374151;
}

.burnbills-calculator .bb-next-steps h2,
.burnbills-calculator .bb-faq h2 {
  color: #111827;
  margin-top: 0;
}

.burnbills-calculator .bb-next-steps ul {
  padding-left: 22px;
}

.burnbills-calculator .bb-disclaimer {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.5;
  margin-top: 20px;
}

.burnbills-calculator .bb-note {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e3a8a;
  padding: 16px;
  border-radius: 12px;
  margin-top: 18px;
  line-height: 1.5;
  font-size: 14px;
}

@media (max-width: 768px) {
  .burnbills-calculator {
    padding: 22px 14px;
  }

  .burnbills-calculator h1 {
    font-size: 29px;
  }

  .burnbills-calculator .bb-subtitle {
    font-size: 16px;
  }

  .burnbills-calculator .bb-grid,
  .burnbills-calculator .bb-results-grid {
    grid-template-columns: 1fr;
  }

  .burnbills-calculator .bb-card {
    padding: 22px;
  }

  .burnbills-calculator .bb-result-value {
    font-size: 22px;
  }
}