/* ═══════════════════════════════════════════════════════════════
   Optional Subject Selector — quiz styles
═══════════════════════════════════════════════════════════════ */

.oss-quiz {
  max-width: 720px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: 14px;
  padding: var(--space-6);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

/* Progress bar */
.oss-progress-bar {
  height: 6px;
  background: var(--color-bg-alt);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 10px;
}

.oss-progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0%, #b8860b 100%);
  border-radius: 3px;
  transition: width 0.4s ease;
}

.oss-progress-text {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-5);
}

/* Question */
.oss-question {
  display: none;
}

.oss-question--active {
  display: block;
  animation: ossFadeIn 0.3s ease;
}

@keyframes ossFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.oss-question__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-brand);
  margin-bottom: 6px;
}

.oss-question__sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}

.oss-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.oss-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg);
  cursor: pointer;
  transition: all 0.15s;
}

.oss-option:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-text-muted);
}

.oss-option input[type="radio"],
.oss-option input[type="checkbox"] {
  accent-color: var(--color-accent);
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.oss-option:has(input:checked) {
  background: rgba(212,160,23,0.08);
  border-color: var(--color-accent);
}

.oss-option__text {
  flex: 1;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
}

.oss-option__sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
  font-weight: normal;
}

/* Navigation */
.oss-nav {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.oss-nav .calc-btn {
  width: auto;
  flex: 1;
  margin: 0;
  max-width: 200px;
}

/* Result cards */
.oss-result-hero {
  background: linear-gradient(135deg, var(--color-brand) 0%, #0d4031 100%);
  color: #fff;
  border-radius: 14px;
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  text-align: center;
}

.oss-result-hero__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.7;
  margin-bottom: 8px;
}

.oss-result-hero__name {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.1;
}

.oss-result-hero__group {
  font-size: var(--text-sm);
  opacity: 0.85;
}

.oss-result-hero__score {
  display: inline-block;
  margin-top: 14px;
  padding: 6px 14px;
  background: rgba(255,255,255,0.15);
  border-radius: 16px;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

/* Ranked list */
.oss-ranked {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: var(--space-4);
}

.oss-ranked-item {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 14px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: 10px;
}

.oss-ranked-item--top {
  background: linear-gradient(90deg, #fefce8 0%, #fef9c3 100%);
  border-color: #fde047;
}

.oss-ranked-item__rank {
  width: 30px; height: 30px;
  background: var(--color-bg-alt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.oss-ranked-item--top .oss-ranked-item__rank {
  background: #facc15;
  color: #713f12;
}

.oss-ranked-item__info {
  min-width: 0;
}

.oss-ranked-item__name {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: 2px;
}

.oss-ranked-item__why {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.oss-ranked-item__score {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-brand);
}

.oss-ranked-item__score-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: var(--font-semibold);
  text-align: right;
}

/* Subject detail expansion */
.oss-detail-toggle {
  background: transparent;
  border: none;
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  cursor: pointer;
  padding: 4px 0;
  text-decoration: none;
}

.oss-detail-toggle:hover {
  text-decoration: underline;
}

/* Tags / chips */
.oss-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: var(--font-semibold);
  margin-right: 4px;
  margin-top: 4px;
}

.oss-tag--high { background: #dcfce7; color: #15803d; }
.oss-tag--medium { background: #fef9c3; color: #a16207; }
.oss-tag--low { background: #fee2e2; color: #b91c1c; }
.oss-tag--info { background: #dbeafe; color: #1d4ed8; }