/* =============================================
   Marking Scheme Guide
   ============================================= */

.ms-wrap {
  padding-top: 36px;
  padding-bottom: 80px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── SUBJECT PICKER ROW ── */
.ms-subject-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.ms-subject-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-md);
  background: var(--white);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-600);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.ms-subject-btn:hover:not([disabled]) {
  border-color: var(--green-400);
  color: var(--green-700);
}

.ms-subject-btn.active {
  background: var(--green-600);
  border-color: var(--green-600);
  color: white;
}

.ms-subject-soon {
  opacity: 0.5;
  cursor: not-allowed;
}

.ms-subject-emoji { font-size: 1rem; }

.ms-soon-badge {
  font-size: 0.65rem;
  font-weight: 800;
  background: var(--gray-200);
  color: var(--gray-500);
  padding: 2px 6px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

[data-theme="dark"] .ms-subject-btn {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.1);
  color: #94a3b8;
}

[data-theme="dark"] .ms-subject-btn.active {
  background: var(--green-600);
  border-color: var(--green-600);
  color: white;
}

/* ── LAYOUT ── */
.ms-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  align-items: start;
  min-height: 600px;
}

/* ── TOPIC NAV (left) ── */
.ms-topic-nav {
  background: var(--white);
  border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 88px;
  max-height: calc(100vh - 120px);
}

[data-theme="dark"] .ms-topic-nav {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
}

.ms-topic-nav-header {
  padding: 14px 16px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-100);
  flex-shrink: 0;
}

[data-theme="dark"] .ms-topic-nav-header {
  border-bottom-color: rgba(255,255,255,0.06);
}

.ms-topic-search {
  margin: 8px 10px;
  padding: 8px 12px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: 0.85rem;
  color: var(--gray-800);
  background: var(--gray-50);
  flex-shrink: 0;
  transition: border-color var(--transition);
}

.ms-topic-search:focus {
  outline: none;
  border-color: var(--green-400);
}

[data-theme="dark"] .ms-topic-search {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
  color: #e2e8f0;
}

.ms-topic-list {
  overflow-y: auto;
  flex: 1;
  padding: 4px 0 10px;
}

.ms-strand-group { margin-bottom: 4px; }

.ms-strand-label {
  padding: 8px 14px 4px;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--gray-400);
}

.ms-topic-item {
  padding: 9px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #374151;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all var(--transition);
  line-height: 1.35;
}

[data-theme="dark"] .ms-topic-item { color: #94a3b8; }

.ms-topic-item:hover {
  background: var(--green-50);
  border-left-color: var(--green-300);
  color: var(--green-800);
}

[data-theme="dark"] .ms-topic-item:hover {
  background: rgba(22,163,74,0.1);
  border-left-color: var(--green-500);
  color: #86efac;
}

.ms-topic-item.active {
  background: var(--green-50);
  border-left-color: var(--green-600);
  color: var(--green-800);
  font-weight: 600;
}

[data-theme="dark"] .ms-topic-item.active {
  background: rgba(22,163,74,0.15);
  border-left-color: var(--green-400);
  color: #4ade80;
}

.ms-no-results {
  padding: 16px 14px;
  font-size: 0.83rem;
  color: var(--gray-400);
}

/* ── DETAIL PANEL (right) ── */
.ms-detail-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 500px;
}

.ms-detail-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  background: var(--white);
  border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-xl);
  text-align: center;
  color: var(--gray-400);
  font-size: 0.92rem;
}

[data-theme="dark"] .ms-detail-empty {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.07);
}

/* ── DETAIL CONTENT ── */
#msDetailContent {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ms-detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 4px;
}

.ms-detail-strand {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--green-700);
  margin-bottom: 6px;
}

[data-theme="dark"] .ms-detail-strand { color: #4ade80; }

.ms-detail-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -0.4px;
  line-height: 1.2;
}

[data-theme="dark"] .ms-detail-title { color: #f1f5f9; }

/* Overview card */
.ms-overview-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
}

[data-theme="dark"] .ms-overview-card {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
}

.ms-section-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 1px; }

.ms-overview-text {
  font-size: 0.92rem;
  color: #374151;
  line-height: 1.65;
}

[data-theme="dark"] .ms-overview-text { color: #cbd5e1; }

/* Section headers */
.ms-section { display: flex; flex-direction: column; gap: 12px; }

.ms-section-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ms-section-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-phrase  { background: #6366f1; }
.dot-full    { background: var(--green-500); }
.dot-partial { background: #f59e0b; }
.dot-mistake { background: #ef4444; }

.ms-section-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.2px;
}

[data-theme="dark"] .ms-section-title { color: #f1f5f9; }

/* Key phrases */
.ms-phrases {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ms-phrase-pill {
  display: inline-block;
  padding: 5px 12px;
  background: #eef2ff;
  color: #4338ca;
  border: 1px solid #c7d2fe;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  font-style: italic;
}

[data-theme="dark"] .ms-phrase-pill {
  background: rgba(99,102,241,0.12);
  color: #a5b4fc;
  border-color: rgba(99,102,241,0.25);
}

/* Two-column layout */
.ms-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* Cards */
.ms-card {
  background: var(--white);
  border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 20px;
}

[data-theme="dark"] .ms-card {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
}

.ms-card-full    { border-top: 3px solid var(--green-500); }
.ms-card-partial { border-top: 3px solid #f59e0b; }
.ms-card-mistakes { border-top: 3px solid #ef4444; }

/* Checklist */
.ms-check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.ms-check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  line-height: 1.55;
  color: #374151;
}

[data-theme="dark"] .ms-check-item { color: #cbd5e1; }

.ms-check-icon {
  font-size: 0.82rem;
  font-weight: 800;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.ms-check-full    .ms-check-icon { background: var(--green-100); color: var(--green-700); }
.ms-check-partial .ms-check-icon { background: #fef3c7; color: #92400e; }
.ms-check-mistake .ms-check-icon { background: #fee2e2; color: #b91c1c; }

[data-theme="dark"] .ms-check-full    .ms-check-icon { background: rgba(22,163,74,0.15); color: #86efac; }
[data-theme="dark"] .ms-check-partial .ms-check-icon { background: rgba(245,158,11,0.15); color: #fbbf24; }
[data-theme="dark"] .ms-check-mistake .ms-check-icon { background: rgba(239,68,68,0.15); color: #fca5a5; }

/* Exam tip */
.ms-tip-card {
  background: #fffbeb;
  border: 1.5px solid #fde68a;
  border-radius: var(--radius-lg);
  padding: 18px 20px;
}

[data-theme="dark"] .ms-tip-card {
  background: rgba(245,158,11,0.07);
  border-color: rgba(245,158,11,0.25);
}

.ms-tip-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #92400e;
  margin-bottom: 10px;
}

[data-theme="dark"] .ms-tip-label { color: #fbbf24; }

.ms-tip-text {
  font-size: 0.9rem;
  color: #78350f;
  line-height: 1.65;
}

[data-theme="dark"] .ms-tip-text { color: #fde68a; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .ms-layout {
    grid-template-columns: 1fr;
  }
  .ms-topic-nav {
    position: static;
    max-height: 300px;
  }
  .ms-two-col {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .ms-subject-btn span:not(.ms-subject-emoji):not(.ms-soon-badge) { display: none; }
  .ms-subject-btn { padding: 10px 14px; }
}