/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast),
              opacity var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: #0d47a1;
  border-color: #0d47a1;
}

.btn-accent {
  background-color: var(--color-correct);
  color: #fff;
  border-color: var(--color-correct);
}

.btn-accent:hover:not(:disabled) {
  background-color: #1b5e20;
  border-color: #1b5e20;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-danger {
  background-color: var(--color-wrong);
  color: #fff;
  border-color: var(--color-wrong);
}

.btn-danger:hover:not(:disabled) {
  background-color: #b71c1c;
  border-color: #b71c1c;
}

.btn-link {
  background: none;
  border-color: transparent;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  padding: var(--space-xs) var(--space-sm);
}

.btn-link:hover:not(:disabled) {
  color: var(--color-primary);
  background: none;
}

.btn-sm {
  font-size: 0.85rem;
  padding: var(--space-xs) var(--space-md);
}

/* ===== Card ===== */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal),
              border-color var(--transition-normal),
              box-shadow var(--transition-normal);
}

/* ===== Progress Bar ===== */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
  min-width: 0;
}

/* ===== Badges ===== */
.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-category {
  background-color: rgba(21, 101, 192, 0.12);
  color: var(--color-primary);
}

.badge-sm {
  font-size: 0.65rem;
  padding: 2px var(--space-xs);
}

/* ===== Number Input ===== */
input[type="number"] {
  width: 5rem;
  padding: var(--space-sm) var(--space-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: 1rem;
  text-align: center;
  transition: border-color var(--transition-fast);
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

input[type="number"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== Count Row (input + max label) ===== */
.count-row {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.count-max {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ===== Input Group & Labels ===== */
.input-group {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.input-label {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* ===== Checkbox Group & Label ===== */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
  font-size: 0.95rem;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: none;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  background-color: rgba(21, 101, 192, 0.06);
}

/* ===== Answer Options (radio / single-select) ===== */
.answer-option {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast);
}

.answer-option:hover:not(.locked) {
  border-color: var(--color-primary);
  background-color: rgba(21, 101, 192, 0.04);
}

.answer-option.selected {
  border-color: var(--color-primary);
  background-color: rgba(21, 101, 192, 0.08);
}

.answer-option.correct {
  border-color: var(--color-correct);
  background-color: var(--color-correct-bg);
}

.answer-option.incorrect {
  border-color: var(--color-wrong);
  background-color: var(--color-wrong-bg);
}

.answer-option.missed {
  border-color: var(--color-correct);
  border-style: dashed;
  background-color: rgba(46, 125, 50, 0.04);
}

.answer-option.locked {
  cursor: default;
  pointer-events: none;
}

/* Answer radio (native, styled with accent-color) */
.answer-radio {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
  margin-top: 2px;
}

.answer-option.locked .answer-radio {
  cursor: default;
}

.answer-text {
  flex: 1;
  line-height: 1.45;
  color: var(--color-text);
}

/* ===== Feedback Banner ===== */
.feedback-banner {
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-top: var(--space-md);
}

.feedback-text {
  flex: 1;
  text-align: center;
}

.feedback-banner .explanation-btn {
  position: absolute;
  right: var(--space-md);
  background: none;
  border: none;
  padding: 0 4px;
  font-size: 0.8rem;
  font-weight: 500;
  color: inherit;
  cursor: pointer;
  opacity: 0.6;
  text-decoration: none;
  transition: opacity var(--transition-fast);
  white-space: nowrap;
}

.feedback-banner .explanation-btn:hover {
  opacity: 1;
}

.feedback-placeholder {
  visibility: hidden;
}

.feedback-correct {
  background-color: var(--color-correct-bg);
  color: var(--color-correct);
  border: 1px solid var(--color-correct);
}

.feedback-incorrect {
  background-color: var(--color-wrong-bg);
  color: var(--color-wrong);
  border: 1px solid var(--color-wrong);
}

/* ===== Overlay ===== */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: var(--color-overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.overlay.hidden {
  display: none;
}

.overlay-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.overlay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-lg) 0;
}

.overlay-header h3 {
  font-size: 1.1rem;
  color: var(--color-text);
  margin: 0;
}

.overlay-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: var(--space-xs);
  line-height: 1;
  transition: color var(--transition-fast);
}

.overlay-close:hover {
  color: var(--color-text);
}

.overlay-body {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  overflow-y: auto;
  max-height: 60vh;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text);
}

.overlay-body ul {
  margin: var(--space-xs) 0;
  padding-left: var(--space-lg);
}

.overlay-body li {
  margin-bottom: 2px;
}

/* ===== Category Chips ===== */
.category-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  border: none;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  opacity: 0.35;
}

.category-chip.active {
  opacity: 1;
}

.category-chip:hover {
  transform: scale(1.03);
}

.category-chip .chip-count {
  font-weight: 400;
  opacity: 0.85;
  font-size: 0.8rem;
}

/* ===== Question Image ===== */
.question-image {
  max-width: 100%;
  width: 360px;
  margin: var(--space-md) auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

/* ===== Answer Content Wrapper ===== */
.answer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

/* ===== Answer Image ===== */
.answer-image {
  max-width: 100%;
  width: 280px;
  margin: var(--space-xs) auto 0;
  border-radius: var(--radius-sm);
}

/* ===== Calculation Answer ===== */
.calc-answer {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.calc-result {
  font-weight: 700;
  min-width: 7rem;
  font-size: 1rem;
}

.calc-rechenweg {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.calc-label {
  white-space: nowrap;
  padding-top: 2px;
}

.calc-columns {
  display: flex;
  gap: var(--space-lg);
}

.calc-column {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-variant-numeric: tabular-nums;
}

.calc-value {
  padding: 1px 0;
  white-space: nowrap;
}

.calc-line {
  width: 100%;
  border-bottom: 2px solid var(--color-text-secondary);
  margin: 2px 0;
}

.calc-sum {
  font-weight: 600;
  color: var(--color-text);
}

/* ===== Result Category Bar ===== */
.result-category-bar {
  position: relative;
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: visible;
  flex: 1;
  min-width: 80px;
}

.result-category-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.result-category-bar-fill.bar-passed {
  background-color: var(--color-correct);
}

.result-category-bar-fill.bar-failed {
  background-color: var(--color-wrong);
}

.result-category-bar-fill.bar-neutral {
  background-color: var(--color-primary);
}

.result-category-bar-threshold {
  position: absolute;
  top: -3px;
  width: 2px;
  height: 14px;
  background-color: var(--color-text);
  border-radius: 1px;
  opacity: 0.5;
}

/* ===== Explanation Button (inline) ===== */
.explanation-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.85rem;
  color: var(--color-primary);
  cursor: pointer;
  margin-top: var(--space-sm);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.explanation-btn:hover {
  border-color: var(--color-primary);
  background-color: rgba(21, 101, 192, 0.04);
}