:root {
  --cb-ink: #1c1917;
  --cb-muted: #57534e;
  --cb-line: #e7e5e4;
  --cb-paper: #fffdf8;
  --cb-cream: #f4efe6;
  --cb-accent: #0f766e;
  --cb-accent-2: #c2410c;
  --cb-soft: #ccfbf1;
  --cb-shadow: 0 14px 36px rgba(28, 25, 23, .08);
  --cb-radius: 18px;
}
.cb-page {
  background: var(--cb-cream);
  color: var(--cb-ink);
  font-family: "Source Serif 4", Georgia, "Noto Serif", serif;
}
.cb-page .header-actions .gks-lang-switch,
.cb-page .gks-lang-drawer .gks-lang-switch { display: none; }
.cb-wrap { width: min(1180px, calc(100% - 24px)); margin: 0 auto; padding: 12px 0 72px; }
.cb-crumb {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  font-family: Inter, "Segoe UI", sans-serif; font-size: 13px; color: #78716c; margin: 8px 0 18px;
}
.cb-crumb a { color: var(--cb-accent); font-weight: 700; text-decoration: none; }
.cb-kicker {
  margin: 0 0 8px; font-family: Inter, sans-serif; font-size: 12px; font-weight: 800;
  letter-spacing: .08em; text-transform: uppercase; color: var(--cb-accent-2);
}
.cb-page h1 { margin: 0 0 12px; font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 1.22; }
.cb-dek { font-size: 1.12rem; line-height: 1.65; color: #44403c; margin: 0 0 18px; }
.cb-note {
  background: #fff7ed; border: 1px solid #fed7aa; border-radius: 14px;
  padding: 12px 14px; font-family: Inter, sans-serif; font-size: 14px; line-height: 1.55; margin: 0 0 22px;
}
.cb-hi-bridge {
  font-family: Inter, sans-serif; font-size: 15px; line-height: 1.55;
  background: #ecfdf5; border: 1px solid #a7f3d0; border-radius: 12px;
  padding: 10px 12px; margin: 0 0 16px;
}
.cb-hi-bridge a { font-weight: 800; color: #047857; }
.cb-syll-sub { margin: 0 0 22px; }
.cb-syll-sub h3 { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; }
.cb-syll-list { padding-left: 22px; margin: 10px 0 0; }
.cb-syll-list li { margin: 0 0 8px; }
.cb-syll-card { min-height: auto; margin: 0 0 14px; display: block; }
.cb-paper-secs { padding-left: 18px; margin: 8px 0; line-height: 1.5; }
.cb-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px;
}
.cb-class-card, .cb-sub-card, .cb-ch-card, .cb-type-card {
  display: flex; flex-direction: column; gap: 6px; text-decoration: none; color: inherit;
  background: var(--cb-paper); border: 1px solid var(--cb-line); border-radius: var(--cb-radius);
  padding: 16px 14px; box-shadow: var(--cb-shadow); min-height: 120px;
  transition: transform .15s ease, border-color .15s;
}
.cb-class-card:hover, .cb-sub-card:hover, .cb-ch-card:hover, .cb-type-card:hover {
  transform: translateY(-3px); border-color: var(--cb-accent);
}
.cb-class-card .cb-ico { font-size: 1.6rem; }
.cb-class-card strong, .cb-sub-card strong, .cb-ch-card strong { font-size: 1.15rem; }
.cb-meta { font-family: Inter, sans-serif; font-size: 12px; color: var(--cb-muted); }
.cb-hero {
  background: var(--cb-paper); border: 1px solid var(--cb-line); border-radius: 24px;
  padding: 22px 20px; margin: 0 0 22px; box-shadow: var(--cb-shadow);
  background-image:
    radial-gradient(circle at 100% 0, color-mix(in srgb, var(--cb-accent) 18%, transparent), transparent 46%),
    radial-gradient(circle at 0 100%, color-mix(in srgb, var(--cb-accent-2) 12%, transparent), transparent 40%);
}
.cb-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.cb-chip {
  font-family: Inter, sans-serif; font-size: 12px; font-weight: 700;
  background: #fff; border: 1px solid var(--cb-line); border-radius: 999px; padding: 5px 10px;
}
.cb-sec { margin: 28px 0; }
.cb-sec h2 { font-size: 1.35rem; margin: 0 0 12px; }
.cb-type-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px;
}
.cb-type-card { min-height: 72px; padding: 12px; font-family: Inter, sans-serif; font-size: 14px; font-weight: 700; }
.cb-q {
  background: var(--cb-paper); border: 1px solid var(--cb-line); border-radius: 16px;
  padding: 14px 16px; margin: 0 0 12px; scroll-margin-top: 90px;
}
.cb-q-top {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  font-family: Inter, sans-serif; font-size: 12px; margin-bottom: 8px;
}
.cb-q h3 { margin: 0 0 10px; font-size: 1.05rem; line-height: 1.45; font-weight: 650; }
.cb-opts { list-style: none; padding: 0; margin: 0 0 10px; font-family: Inter, sans-serif; }
.cb-opts li {
  border: 1px solid var(--cb-line); border-radius: 10px; padding: 8px 10px; margin: 0 0 6px; background: #fff;
}
.cb-reveal {
  font-family: Inter, sans-serif; font-weight: 800; border: 0; border-radius: 999px;
  background: var(--cb-accent); color: #fff; padding: 8px 14px; cursor: pointer;
}
.cb-ans { display: none; margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--cb-line); }
.cb-q.is-open .cb-ans,
.cb-exam-q.is-open .cb-ans,
details.cb-reveal-box[open] .cb-ans { display: block; }
.cb-q.is-open .cb-reveal { background: #44403c; }
.cb-ans b { font-family: Inter, sans-serif; display: block; margin: 8px 0 4px; font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--cb-accent); }
.cb-ans p, .cb-ans pre { margin: 0 0 8px; white-space: pre-wrap; font-family: inherit; }
.cb-filters {
  position: sticky; top: 8px; z-index: 5; background: color-mix(in srgb, var(--cb-cream) 88%, transparent);
  backdrop-filter: blur(8px); padding: 8px 0; margin: 0 0 14px;
  display: flex; flex-wrap: wrap; gap: 8px;
}
.cb-filters button {
  font-family: Inter, sans-serif; font-size: 13px; font-weight: 700;
  border: 1px solid var(--cb-line); background: #fff; border-radius: 999px; padding: 6px 12px; cursor: pointer;
}
.cb-filters button.is-on { background: var(--cb-accent); color: #fff; border-color: var(--cb-accent); }
.cb-progress {
  font-family: Inter, sans-serif; font-size: 13px; font-weight: 700; color: var(--cb-accent);
}
.cb-faq details {
  background: var(--cb-paper); border: 1px solid var(--cb-line); border-radius: 12px;
  padding: 10px 14px; margin: 0 0 8px;
}
.cb-faq summary { font-weight: 700; cursor: pointer; }
.cb-links { display: flex; flex-wrap: wrap; gap: 10px; }
.cb-links a {
  font-family: Inter, sans-serif; font-weight: 700; color: var(--cb-accent); text-decoration: none;
  background: #fff; border: 1px solid var(--cb-line); border-radius: 999px; padding: 8px 12px;
}
.cb-hero-cta, .cb-links a.cb-hero-cta {
  font-family: Inter, "Segoe UI", sans-serif; font-weight: 800; font-size: 13px;
  text-decoration: none; color: #fff; background: var(--cb-accent);
  border-radius: 999px; padding: 8px 14px; display: inline-block; border-color: var(--cb-accent);
}
.cb-two { display: grid; grid-template-columns: 1.4fr .8fr; gap: 18px; align-items: start; }
.cb-side {
  background: var(--cb-paper); border: 1px solid var(--cb-line); border-radius: 16px; padding: 14px;
  position: sticky; top: 12px;
}
.cb-side h2 { font-size: 1rem; margin: 0 0 10px; }
.cb-side a { display: block; font-family: Inter, sans-serif; font-size: 14px; color: var(--cb-accent); text-decoration: none; padding: 5px 0; }
.cb-formulas { font-family: Inter, sans-serif; background: #ecfeff; border-radius: 12px; padding: 10px 12px; margin: 0 0 14px; }
@media (max-width: 860px) {
  .cb-two { grid-template-columns: 1fr; }
  .cb-side { position: static; }
  .cb-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.cb-page.cb-child { font-size: 1.05rem; }
.cb-page.cb-child .cb-q h3 { font-size: 1.12rem; }
.cb-empty { padding: 20px; background: #fff; border-radius: 14px; }
.cb-toc { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 16px; }
.cb-toc a { font-family: Inter, sans-serif; font-size: 12px; color: var(--cb-muted); text-decoration: none; }
.cb-page .gks-ads-top:not(:has(iframe)) { display: none; }