/* =========================
   CSS Section Menu
   1. CSS Variables (Theme Colors, Spacing, etc.)
   2. Layout Containers
   3. Card Component Styling
   4. Mode Selection Styling
   5. Fieldset Styling
   6. Form Grid & Group Styling
   7. Tooltip Styling
   ========================= */

/* =========================
   CSS Variables (Theme Colors, Spacing, etc.)
   ========================= */
:root {
  --primary-color: #007bff;
  --primary-hover-color: #0056b3;
  --secondary-color: #6c757d;
  --secondary-hover-color: #545b62;
  --accent-color: #28a745;
  --accent-color-alt: #ffc107;
  --error-color: #dc3545;
  --light-gray-color: #f8f9fa;
  --medium-gray-color: #e9ecef;
  --dark-gray-color: #343a40;
  --text-color: #212529;
  --text-muted-color: #6c757d;
  --border-radius: 0.375rem;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* =========================
   Layout Containers
   ========================= */
.container {
  width: 100%;
  max-width: 100%;
}

/* =========================
   Card Component Styling
   ========================= */
.card {
  background-color: #ffffff;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  overflow: hidden;
  border: 1px solid var(--medium-gray-color);
}

.card-header {
  padding: 1.5rem 2rem;
  text-align: center;
  border-bottom: 1px solid var(--medium-gray-color);
  background-color: #fdfdff;
}

.card-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 0 0 0.5rem 0;
  color: var(--dark-gray-color);
}

.card-description {
  color: var(--text-muted-color);
  font-size: 0.95rem;
  margin: 0;
}

.card-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem; /* Reduced gap slightly */
}

/* =========================
   Mode Selection Styling
   ========================= */
.mode-selection-fieldset {
  border: 1px solid var(--primary-color); /* Highlight mode selection */
  background-color: #f0f7ff; /* Light blue background */
}
.mode-selection-fieldset legend {
  color: var(--primary-color);
}
.mode-selection {
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 0.5rem 0;
}
.mode-selection label {
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.mode-selection input[type="radio"] {
  accent-color: var(--primary-color);
  width: 1.2em;
  height: 1.2em;
}

/* =========================
   Fieldset Styling
   ========================= */
fieldset {
  border: 1px solid var(--medium-gray-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin: 0;
}

fieldset legend {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark-gray-color); /* Default legend color */
  padding: 0 0.5rem;
  margin-left: 0.5rem;
}

/* =========================
   Form Grid & Group Styling
   ========================= */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.input-with-icon {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted-color);
  font-size: 0.9em;
  pointer-events: none;
}

.form-group input[type="number"],
.form-group select {
  width: 100%;
  padding: 0.75rem;
  padding-left: 2.2rem;
  border: 1px solid #ced4da;
  border-radius: var(--border-radius);
  box-sizing: border-box;
  font-size: 1rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}
.form-group select {
  padding-left: 0.75rem;
}

.form-group input[type="number"]:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* =========================
   Tooltip Styling
   ========================= */
.tooltip {
  position: relative;
  cursor: help;
  font-size: 0.8em;
  color: var(--text-muted-color);
  border: 1px solid var(--text-muted-color);
  border-radius: 50%;
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 4px;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--dark-gray-color);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  white-space: pre-line;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  z-index: 10;
  min-width: 200px;
  max-width: 320px;
  box-sizing: border-box;
  word-break: break-word;
  pointer-events: none;
}
@media (max-width: 400px) {
  .tooltip::after {
    min-width: 120px;
    max-width: 90vw;
    left: 0;
    right: 0;
    transform: none;
  }
}
.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* Error Message & Loading Indicator */
.error-message {
  background-color: #f8d7da;
  color: var(--error-color);
  padding: 1rem;
  border: 1px solid #f5c6cb;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
}
.error-message::before {
  content: "⚠️";
  margin-right: 0.5rem;
  font-size: 1.25rem;
}

.loading-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  font-size: 1rem;
  color: var(--primary-color);
}

.spinner {
  border: 4px solid rgba(0, 0, 0, 0.1);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border-left-color: var(--primary-color);
  animation: spin 1s ease infinite;
  margin-right: 0.75rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Button Group & Buttons */
.button-group {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.primary-button,
.secondary-button {
  flex-grow: 1;
  font-size: 1.05rem;
  font-weight: 500;
  padding: 0.85rem 1rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color 0.2s, box-shadow 0.2s;
  text-align: center;
}

.primary-button {
  background-color: var(--primary-color);
  color: #ffffff;
}
.primary-button:hover {
  background-color: var(--primary-hover-color);
  box-shadow: 0 2px 8px rgba(0, 123, 255, 0.3);
}

.secondary-button {
  background-color: var(--secondary-color);
  color: #ffffff;
}
.secondary-button:hover {
  background-color: var(--secondary-hover-color);
  box-shadow: 0 2px 8px rgba(108, 117, 125, 0.3);
}

/* Results Section */
.results-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--medium-gray-color);
}

.results-title {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--dark-gray-color);
}

.results-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); /* Adjusted minmax for basic */
  gap: 1rem; /* Adjusted gap */
  margin-bottom: 1.5rem; /* Adjusted margin */
  text-align: center;
}

.summary-item {
  background-color: var(--light-gray-color);
  padding: 1.25rem; /* Adjusted padding */
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.summary-item .label {
  font-size: 0.85rem; /* Adjusted font size */
  color: var(--text-muted-color);
  margin-bottom: 0.4rem; /* Adjusted margin */
  display: block;
}

.summary-item .value {
  font-size: 1.5rem; /* Adjusted font size */
  font-weight: 700;
}
.summary-item .value.positive {
  color: var(--accent-color);
}
.summary-item .value.neutral {
  color: var(--primary-color);
}
.summary-item .value.negative {
  /* For unmet payback */
  color: var(--error-color);
}

.results-details-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 768px) {
  .results-details-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.detail-item {
  background-color: #fff;
  border: 1px solid var(--medium-gray-color);
  padding: 1rem;
  border-radius: var(--border-radius);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.detail-item.payback-comparison .value {
  font-weight: normal; /* Make comparison text less bold */
}
.detail-item.payback-comparison .status-met {
  color: var(--accent-color);
  font-weight: 600;
}
.detail-item.payback-comparison .status-not-met {
  color: var(--error-color);
  font-weight: 600;
}

.detail-item .label {
  font-size: 0.95rem;
  color: var(--text-muted-color);
}

.detail-item .value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-color);
}

/* Card Footer */
.card-footer {
  padding: 1.5rem 2rem;
  background-color: var(--light-gray-color);
  border-top: 1px solid var(--medium-gray-color);
}

.disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted-color);
  text-align: center;
  margin: 0;
}

/* Hide advanced inputs container by default if needed via JS, or initially hide if basic is default */
#advanced-inputs-container.hidden {
  display: none;
}

/* Add this if you want the "Desired Payback Period" to take full width in the grid */
.form-grid .full-width-group {
  grid-column: 1 / -1; /* Span all columns */
}