/* Common styles for all calculators */
.wpcalc-calculator {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  color: #333;
  line-height: 1.6;
}

.wpcalc-calculator h1 {
  color: #1a365d;
  margin-bottom: 15px;
  font-size: 28px;
}

.wpcalc-calculator .small {
  font-size: 0.9em;
  color: #666;
  margin-bottom: 20px;
}

.wpcalc-calculator .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.wpcalc-calculator .card {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  border: 1px solid #e2e8f0;
}

.wpcalc-calculator .label {
  margin: 15px 0 5px;
  font-weight: 500;
  color: #4a5568;
}

.wpcalc-calculator .row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.wpcalc-calculator input[type="range"] {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: #e2e8f0;
  -webkit-appearance: none;
}

.wpcalc-calculator input[type="number"],
.wpcalc-calculator input[type="text"] {
  width: 120px;
  padding: 8px 12px;
  border: 1px solid #cbd5e0;
  border-radius: 4px;
  font-size: 14px;
}

.wpcalc-calculator .btn {
  background: #4299e1;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.2s;
}

.wpcalc-calculator .btn:hover {
  background: #3182ce;
}

.wpcalc-calculator .btn.outline {
  background: transparent;
  border: 1px solid #4299e1;
  color: #4299e1;
}

.wpcalc-calculator .kv {
  display: flex;
  justify-content: space-between;
  margin: 8px 0;
  padding: 8px 0;
  border-bottom: 1px solid #edf2f7;
}

.wpcalc-calculator .kv.total {
  border-top: 2px solid #e2e8f0;
  margin-top: 15px;
  padding-top: 12px;
  font-weight: 600;
}

.wpcalc-calculator .num {
  color: #2b6cb0;
  font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .wpcalc-calculator .grid {
    grid-template-columns: 1fr;
  }
  
  .wpcalc-calculator .row {
    flex-direction: column;
    align-items: stretch;
  }
  
  .wpcalc-calculator input[type="number"],
  .wpcalc-calculator input[type="text"] {
    width: 100%;
    box-sizing: border-box;
  }
}

/* Accessibility improvements */
.wpcalc-calculator input:focus {
  outline: 2px solid #4299e1;
  outline-offset: 2px;
}

.wpcalc-calculator .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}