/* Class 6 NCERT Q&A hub — GKSchools teal */
:root {
  --c6-teal: #0f766e;
  --c6-teal-dark: #115e59;
  --c6-ink: #0f172a;
  --c6-muted: #64748b;
  --c6-line: #e2e8f0;
  --c6-bg: #f1f5f9;
  --c6-paper: #ffffff;
  --c6-ok: #15803d;
}

.c6-page {
  background: var(--c6-bg);
  color: var(--c6-ink);
  min-height: 100vh;
  font-family: var(--gks-font, Inter, "Segoe UI", system-ui, sans-serif);
  font-size: var(--gks-fs-body, 1.0625rem);
  line-height: 1.65;
}

.c6-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 16px 48px;
}

.c6-hero {
  background: linear-gradient(135deg, #0f766e 0%, #115e59 55%, #134e4a 100%);
  color: #fff;
  border-radius: 16px;
  padding: 28px 24px;
  margin-bottom: 20px;
  box-shadow: 0 10px 28px rgba(15, 118, 110, 0.22);
}

.c6-hero h1 {
  margin: 0 0 8px;
  font-size: var(--gks-fs-h1, clamp(1.875rem, 3vw, 2.75rem));
  line-height: 1.22;
}

.c6-hero p {
  margin: 0;
  opacity: 0.95;
  max-width: 46rem;
  font-size: var(--gks-fs-sub, 1.125rem);
  line-height: 1.55;
}

.c6-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: var(--gks-fs-small, 0.95rem);
  margin-bottom: 14px;
  color: var(--c6-muted);
}

.c6-crumb a {
  color: var(--c6-teal);
  text-decoration: none;
  font-weight: 600;
}

.c6-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}

.c6-tabs a,
.c6-chip,
.c6-filter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--c6-line);
  background: #fff;
  color: var(--c6-ink);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--gks-fs-small, 1rem);
  cursor: pointer;
}

.c6-tabs a.is-on,
.c6-filter.is-on,
.c6-chip.is-on {
  background: var(--c6-teal);
  border-color: var(--c6-teal);
  color: #fff;
}

.c6-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.c6-card {
  background: var(--c6-paper);
  border: 1px solid var(--c6-line);
  border-radius: 14px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  display: block;
}

.c6-card:hover {
  border-color: #99f6e4;
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.12);
}

.c6-card .c6-ico {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.c6-card strong {
  display: block;
  font-size: var(--gks-fs-sub, 1.125rem);
  color: var(--c6-teal-dark);
}

.c6-card p {
  margin: 6px 0 0;
  color: var(--c6-muted);
  font-size: var(--gks-fs-small, 1rem);
  line-height: 1.5;
}

.c6-stat {
  margin-top: 10px;
  font-weight: 800;
  color: var(--c6-teal);
  font-size: var(--gks-fs-small, 1rem);
}

.c6-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.c6-chapters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 16px;
}

.c6-q {
  background: #fff;
  border: 1px solid var(--c6-line);
  border-radius: 12px;
  padding: 14px 16px 12px;
  margin: 0 0 12px;
}

.c6-q[hidden] {
  display: none !important;
}

.c6-q-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
  font-size: var(--gks-fs-small, 0.9rem);
  font-weight: 700;
}

.c6-badge {
  background: #ccfbf1;
  color: #115e59;
  padding: 3px 8px;
  border-radius: 999px;
}

.c6-badge-mcq { background: #dbeafe; color: #1e40af; }
.c6-badge-short { background: #fef3c7; color: #92400e; }
.c6-badge-long { background: #fce7f3; color: #9d174d; }

.c6-q h3 {
  margin: 0 0 10px;
  font-size: var(--gks-fs-sub, 1.125rem);
  line-height: 1.5;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.c6-opts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.c6-opts li {
  margin: 0 0 6px;
  padding: 10px 12px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #f8fafc;
  min-height: 44px;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.c6-ans {
  margin-top: 8px;
  border-top: 1px dashed var(--c6-line);
  padding-top: 8px;
}

.c6-ans summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--c6-teal);
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.c6-ans summary::-webkit-details-marker {
  display: none;
}

.c6-ans .c6-key {
  margin: 8px 0 0;
  color: var(--c6-ok);
  font-weight: 800;
}

.c6-ans p {
  margin: 6px 0 0;
  color: #334155;
  line-height: 1.55;
}

.c6-note {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--c6-line);
  margin-top: 18px;
}

.c6-note h2 {
  margin: 0 0 8px;
  font-size: var(--gks-fs-h3, 1.5rem);
  color: var(--c6-teal-dark);
}

@media (max-width: 640px) {
  .c6-page { overflow-x: clip; }
  .c6-shell { padding: 12px 12px calc(36px + env(safe-area-inset-bottom, 0px)); }
  .c6-hero h1 { font-size: clamp(1.35rem, 6vw, 1.85rem); }
  .c6-hero { padding: 16px 12px; }
  .c6-q { padding: 12px; }
  .c6-tabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
}