/* Calculator Base Styles */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text, #1a1a2e);
  background: var(--color-bg, #ffffff);
}

.calculator {
  max-width: 800px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Header */
.calc-header {
  margin-bottom: 1.5rem;
}

.calc-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--color-text, #1a1a2e);
}

.calc-description {
  margin: 0;
  color: var(--color-text-muted, #6b7280);
}

/* Inputs */
.calc-inputs {
  margin-bottom: 1.5rem;
}

.input-group {
  margin-bottom: 1rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
}

.calc-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-family: var(--font-mono, 'SF Mono', 'Fira Code', monospace);
  font-size: 0.9375rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 6px;
  background: var(--color-bg, #ffffff);
  color: var(--color-text, #1a1a2e);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.calc-input:focus {
  outline: none;
  border-color: var(--color-primary, #2563eb);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.calc-input::placeholder {
  color: var(--color-text-muted, #9ca3af);
}

/* Input layouts */
.input-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.input-row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 480px) {
  .input-row,
  .input-row-3 {
    grid-template-columns: 1fr;
  }
}

/* Buttons */
.calc-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  background: var(--color-primary, #2563eb);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.calc-button:hover {
  background: var(--color-primary-hover, #1d4ed8);
}

.calc-button:active {
  transform: scale(0.98);
}

.calc-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.calc-button-secondary {
  background: var(--color-bg-alt, #f3f4f6);
  color: var(--color-text, #1a1a2e);
}

.calc-button-secondary:hover {
  background: var(--color-border, #e5e7eb);
}

/* Results */
.calc-results {
  margin-top: 1.5rem;
}

.calc-results h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
}

.calc-results h2:first-child {
  margin-top: 0;
}

.calc-result {
  padding: 1rem;
  background: var(--color-bg-alt, #f8f9fa);
  border-radius: 8px;
  overflow-x: auto;
}

.calc-result-math {
  font-size: 1.125rem;
  text-align: center;
  padding: 1.25rem;
}

/* Tables */
.calc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.calc-table th,
.calc-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border, #e5e7eb);
}

.calc-table th {
  font-weight: 600;
  background: var(--color-bg-alt, #f8f9fa);
}

.calc-table td {
  font-family: var(--font-mono, monospace);
}

/* Error display */
.calc-error {
  padding: 0.875rem 1rem;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 6px;
  color: #dc2626;
  font-size: 0.875rem;
  margin-top: 1rem;
}

/* Select */
.calc-select {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 6px;
  background: var(--color-bg, #ffffff);
  color: var(--color-text, #1a1a2e);
  cursor: pointer;
}

.calc-select:focus {
  outline: none;
  border-color: var(--color-primary, #2563eb);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Slider */
.calc-slider {
  width: 100%;
  margin: 0.5rem 0;
}

.slider-value {
  display: inline-block;
  min-width: 3rem;
  text-align: center;
  font-family: var(--font-mono, monospace);
  font-size: 0.875rem;
  color: var(--color-text-muted, #6b7280);
}

/* Steps display */
.calc-steps {
  padding: 1rem;
  background: var(--color-bg-alt, #f8f9fa);
  border-radius: 8px;
}

.calc-step {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border, #e5e7eb);
}

.calc-step:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.calc-step-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted, #6b7280);
  margin-bottom: 0.25rem;
}

/* Hidden state */
[hidden] {
  display: none !important;
}