/* ============ FORM STYLES ============ */

/* Section containers */
.section {
  margin-bottom: 25px;
  padding: 20px;
  text-align: left;
  background: var(--card-bg);
  border-radius: 8px;
  border-left: 4px solid var(--secondary);
  transition: background-color 0.3s ease;
}

.section-title {
  font-size: 1.15em;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Form grid layout */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

.form-group {
  margin-bottom: 10px;
}

.form-group.full {
  grid-column: 1 / -1;
}

/* Labels */
label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  font-size: 0.9em;
}

/* Inputs and selects */
input[type='number'],
input[type='text'],
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--input-bg);
  color: var(--text);
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

input[type='number']:focus,
input[type='text']:focus,
select:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(66, 165, 245, 0.2);
}

input[type='number']:disabled,
input[type='text']:disabled,
select:disabled {
  background: var(--input-bg);
  opacity: 0.6;
  cursor: not-allowed;
}

/* Hints */
.hint {
  font-size: 0.8em;
  color: var(--text-muted);
  margin-top: 4px;
}

.hint-formula {
  font-weight: 500;
  color: var(--text);
}

/* Checkbox and radio groups */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0;
}

.checkbox-group input[type='checkbox'],
.checkbox-group input[type='radio'] {
  width: auto;
  margin: 0;
}

.checkbox-group label {
  margin-bottom: 0;
  cursor: pointer;
}

/* Tip box */
.tip-box {
  background: #e3f2fd;
  padding: 15px;
  border-radius: 6px;
  border-left: 4px solid var(--info);
  margin: 15px 0;
  font-size: 0.9em;
}

[data-theme='dark'] .tip-box {
  background: #1a2a3a;
}

.tip-box ul {
  padding-left: 1.5em;
  margin-left: 0;
}

details.before-starting summary span {
  transition: transform 0.2s;
  display: inline-block;
  font-size: 0.85em;
}

details.before-starting[open] summary span {
  transform: rotate(90deg);
}

details.before-starting summary::-webkit-details-marker,
details.before-starting summary::marker {
  display: none;
  content: "";
}

/* Tab navigation */
.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 20px;
  background: #e0e0e0;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

[data-theme='dark'] .tab-btn {
  background: #333333;
  color: #f5f5f5;
}

.tab-btn.active {
  background: var(--secondary);
  color: white;
}

.tab-btn:hover:not(.active) {
  background: #d0d0d0;
}

.tab-btn:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
}

[data-theme='dark'] .tab-btn:hover:not(.active) {
  background: #444444;
}

/* Tab content */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  width: 100%;
  text-align: left;
}

#calcForm {
  width: 100%;
}

.contribution-input {
  display: flex;
  align-items: center;
  gap: 8px;
}

.contribution-input input[type='number'] {
  flex: 1;
  min-width: 0;
}

.contribution-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  font-size: 0.8em;
  color: var(--text-muted);
  cursor: pointer;
  margin-bottom: 0;
}

.contribution-toggle input[type='checkbox'] {
  width: auto;
  margin: 0;
}