/* ===== /repair/bathroom + /bathroom/repair — Repair × Bathroom L3 intersection ===== */
/* Primary accent: Repair rust #B85A2A · Secondary accent: Bathroom slate-blue #6B8AA8 */

.rb {
  --rbrust:  #B85A2A;
  --rbslate: #6B8AA8;
  --rbporcl: #D4E3EE;
}

/* ===== Hero ===== */
.rb-hero {
  position: relative;
  height: 92vh;
  min-height: 760px;
  margin: 0 24px;
  border-radius: 4px;
  overflow: hidden;
  isolation: isolate;
}
.rb-hero .img {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  animation: rbhero 26s ease-in-out infinite alternate;
}
@keyframes rbhero {
  from { transform: scale(1.0); }
  to   { transform: scale(1.10) translate(-1.5%, -1%); }
}
.rb-hero::after {
  content: "";
  position: absolute; inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(12,14,18,0.58) 0%, rgba(12,14,18,0.07) 28%, rgba(12,14,18,0.94) 100%);
}

.rb-mast {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  padding: 22px 36px 16px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(212,227,238,0.85);
  border-bottom: 1px solid rgba(107,138,168,0.28);
}
.rb-mast .crumb a {
  color: rgba(212,227,238,0.85);
  text-decoration: none;
  border-bottom: 1px dotted rgba(107,138,168,0.55);
}
.rb-mast .ctr { color: var(--rbrust); }
.rb-mast .right { letter-spacing: 0.32em; }

.rb-cover {
  position: absolute;
  z-index: 3;
  left: 0; right: 0; bottom: 0;
  padding: 56px 56px 64px;
  color: var(--ink);
  display: grid;
  grid-template-columns: 1.45fr 1fr;
  gap: 60px;
  align-items: end;
}
.rb-cover .eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--rbrust);
  margin-bottom: 24px;
  display: flex; align-items: center; gap: 14px;
}
.rb-cover .eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px; height: 1px;
  background: var(--rbrust);
}
.rb-cover h1 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(64px, 8.2vw, 132px);
  line-height: 0.9;
  letter-spacing: -0.025em;
  margin: 0 0 8px;
  color: #EEF4F8;
  text-shadow: 0 2px 30px rgba(0,0,0,0.45);
  max-width: 13ch;
}
.rb-cover h1 em {
  font-style: italic;
  color: var(--rbslate);
}
.rb-cover .deck {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-weight: 400;
  font-size: clamp(20px, 1.5vw, 24px);
  line-height: 1.5;
  color: rgba(212,227,238,0.92);
  max-width: 38ch;
  margin: 0;
  padding-left: 18px;
  border-left: 2px solid rgba(107,138,168,0.55);
}
.rb-cover .meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px 28px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(107,138,168,0.28);
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(212,227,238,0.7);
}
.rb-cover .meta .k { color: rgba(212,227,238,0.45); display: block; margin-bottom: 4px; font-size: 9px; }
.rb-cover .meta .v { color: var(--ink); font-family: "Playfair Display", serif; font-style: italic; font-size: 16px; letter-spacing: 0.02em; text-transform: none; }

/* ===== TOP 5 ===== */
.rb-top5 {
  padding: 110px 0 100px;
  background: #141519;
  border-bottom: 1px solid var(--rule);
}
.rb-top5-wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 56px;
}
.rb-top5-head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 32px;
  margin: 36px 0 56px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.rb-top5-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(48px, 5.4vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--ink);
  max-width: 18ch;
}
.rb-top5-head h2 em { font-style: italic; color: var(--rbslate); }
.rb-top5-head .deck {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 44ch;
  margin: 0;
}
.rb-top5-head .legend {
  display: flex; flex-direction: column; gap: 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px; letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.rb-top5-head .legend span { display: inline-flex; align-items: center; gap: 10px; }
.rb-top5-head .legend .dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }

.rb-top5-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule);
}
.rb-top5-row {
  display: grid;
  grid-template-columns: 80px 1.4fr 1fr;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
  position: relative;
}
.rb-top5-row .rank {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 56px;
  line-height: 1;
  color: var(--rbslate);
  letter-spacing: -0.01em;
}
.rb-top5-row .query h3 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(28px, 2.6vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
  color: var(--ink);
  max-width: 24ch;
}
.rb-top5-row .query p {
  font-family: "DM Sans", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0 0 18px;
  max-width: 56ch;
}
.rb-top5-row .read {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--rbrust);
  text-decoration: none;
  border-bottom: 1px solid rgba(184,90,42,0.4);
  padding-bottom: 4px;
  transition: color 0.2s, border-color 0.2s;
}
.rb-top5-row .read:hover { color: #EEF4F8; border-bottom-color: var(--rbrust); }
.rb-top5-row .stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 28px;
  align-self: start;
  padding-left: 32px;
  border-left: 1px solid var(--rule);
}
.rb-top5-row .stat {
  display: flex; flex-direction: column;
  padding: 10px 0;
  border-bottom: 1px dashed var(--rule);
}
.rb-top5-row .stat .k {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 4px;
}
.rb-top5-row .stat .v {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 22px;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.rb-top5-row:hover .rank { color: var(--rbrust); }

/* ===== Essay ===== */
.rb-essay {
  padding: 90px 0 110px;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.rb-essay-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 56px;
}
.rb-essay-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 80px;
  align-items: start;
  margin-top: 48px;
}
.rb-essay-side { position: sticky; top: 80px; }
.rb-essay-side h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 4.4vw, 64px);
  line-height: 1.0;
  margin: 0 0 20px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.rb-essay-side h2 em { font-style: italic; color: var(--rbslate); }
.rb-essay-side .by {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 24px;
}
.rb-essay-side .stat-list {
  border-top: 1px solid var(--rule);
  padding-top: 18px;
  margin-top: 20px;
}
.rb-essay-side .stat-list .row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed var(--rule);
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.rb-essay-side .stat-list .row strong {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 18px;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--rbslate);
  font-weight: 400;
}
.rb-essay-body {
  font-family: "Playfair Display", serif;
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink);
  max-width: 62ch;
}
.rb-essay-body p { margin: 0 0 22px; }
.rb-essay-body p.dropcap::first-letter {
  font-size: 78px;
  font-style: italic;
  font-weight: 500;
  float: left;
  line-height: 0.88;
  padding: 6px 14px 0 0;
  color: var(--rbrust);
}
.rb-essay-body em { color: var(--rbslate); }
.rb-essay-body .pull {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 28px;
  line-height: 1.3;
  color: var(--rbrust);
  border-top: 1px solid rgba(184,90,42,0.4);
  border-bottom: 1px solid rgba(184,90,42,0.4);
  padding: 22px 0;
  margin: 32px 0;
}

/* ===== Tool kit ===== */
.rb-tools {
  padding: 100px 0;
  background: #141519;
  border-bottom: 1px solid var(--rule);
}
.rb-tools-wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 56px;
}
.rb-tools-head {
  margin: 36px 0 56px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  align-items: end;
}
.rb-tools-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(44px, 4.8vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
  max-width: 16ch;
}
.rb-tools-head h2 em { font-style: italic; color: var(--rbrust); }
.rb-tools-head .deck {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
  max-width: 42ch;
}
.rb-tools-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.rb-tool {
  background: var(--bg);
  padding: 26px 22px 28px;
  min-height: 220px;
  display: flex; flex-direction: column;
  transition: background 0.3s;
}
.rb-tool:hover { background: #1A1E25; }
.rb-tool .head {
  display: flex; justify-content: space-between; align-items: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}
.rb-tool .head .n { color: var(--rbrust); }
.rb-tool .head .req { color: var(--rbslate); font-style: italic; font-family: "Playfair Display", serif; font-size: 12px; letter-spacing: 0.04em; text-transform: none; }
.rb-tool h4 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: 22px;
  line-height: 1.15;
  margin: 0 0 12px;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.rb-tool p {
  font-family: "DM Sans", sans-serif;
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

/* ===== Categories ===== */
.rb-categories {
  padding: 100px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.rb-categories-wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 56px;
}
.rb-categories-head {
  margin: 36px 0 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.rb-categories-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(48px, 5.2vw, 80px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--ink);
  max-width: 18ch;
}
.rb-categories-head h2 em { font-style: italic; color: var(--rbslate); }
.rb-categories-head .deck {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
  max-width: 58ch;
}
.rb-categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.rb-category {
  background: var(--bg);
  padding: 32px 28px 36px;
  min-height: 260px;
  display: flex; flex-direction: column;
  transition: background 0.3s;
}
.rb-category:hover { background: #1A1E25; }
.rb-category .cat-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}
.rb-category .cat-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--rbrust);
}
.rb-category .cat-count {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 14px;
  color: var(--rbslate);
}
.rb-category h4 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: 24px;
  line-height: 1.12;
  letter-spacing: -0.005em;
  margin: 0 0 14px;
  color: var(--ink);
}
.rb-category p {
  font-family: "DM Sans", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

/* ===== Mistakes ===== */
.rb-mistakes {
  padding: 100px 0;
  background: #141519;
  border-bottom: 1px solid var(--rule);
}
.rb-mistakes-wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 56px;
}
.rb-mistakes-head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  margin: 36px 0 48px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
  gap: 40px;
}
.rb-mistakes-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(44px, 4.8vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
  max-width: 16ch;
}
.rb-mistakes-head h2 em { font-style: italic; color: var(--rbrust); }
.rb-mistakes-head .num {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.rb-mistakes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.rb-mistake {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  padding: 28px 32px 28px 28px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.rb-mistake .n {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 38px;
  color: var(--rbrust);
  line-height: 1;
}
.rb-mistake h4 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: 22px;
  line-height: 1.18;
  margin: 0 0 8px;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.rb-mistake p {
  font-family: "DM Sans", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

/* ===== Sequence ===== */
.rb-sequence {
  padding: 100px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.rb-sequence-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 56px;
}
.rb-sequence-head {
  margin: 36px 0 48px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.rb-sequence-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(44px, 4.8vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--ink);
  max-width: 16ch;
}
.rb-sequence-head h2 em { font-style: italic; color: var(--rbslate); }
.rb-sequence-head .deck {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
  max-width: 56ch;
}
.rb-sequence-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule);
}
.rb-sequence-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.rb-sequence-item .n {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 32px;
  color: var(--rbslate);
  line-height: 1;
}
.rb-sequence-item .text {
  font-family: "Playfair Display", serif;
  font-size: 20px;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.rb-sequence-item .sub {
  font-family: "DM Sans", sans-serif;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-mute);
  margin-top: 4px;
}
.rb-sequence-item:hover .n { color: var(--rbrust); }

/* ===== FAQ ===== */
.rb-faq {
  padding: 100px 56px 110px;
  background: #141519;
  border-bottom: 1px solid var(--rule);
  max-width: 1100px;
  margin: 0 auto;
}
.rb-faq-head {
  margin: 36px 0 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.rb-faq-head .label {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--rbrust);
  display: block;
  margin-bottom: 14px;
}
.rb-faq-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 4.4vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--ink);
  max-width: 18ch;
}
.rb-faq-head h2 em { font-style: italic; color: var(--rbslate); }
.rb-faq-list { border-top: 1px solid var(--rule); }
.rb-faq-item {
  border-bottom: 1px solid var(--rule);
  padding: 22px 0;
  cursor: pointer;
}
.rb-faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  font-family: "Playfair Display", serif;
  font-size: 22px;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.rb-faq-item.open .rb-faq-q { color: var(--rbslate); }
.rb-faq-q .toggle {
  flex-shrink: 0;
  font-family: "JetBrains Mono", monospace;
  font-size: 22px;
  color: var(--rbrust);
  font-weight: 300;
  transition: transform 0.3s;
}
.rb-faq-item.open .rb-faq-q .toggle { transform: rotate(45deg); }
.rb-faq-a {
  font-family: "DM Sans", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, margin-top 0.3s ease;
}
.rb-faq-item.open .rb-faq-a {
  max-height: 480px;
  margin-top: 16px;
}

/* ===== Techniques ===== */
.rb-techniques {
  padding: 100px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.rb-techniques-wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 56px;
}
.rb-techniques-head {
  margin: 36px 0 56px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: end;
}
.rb-techniques-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(44px, 4.8vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
  max-width: 18ch;
}
.rb-techniques-head h2 em { font-style: italic; color: var(--rbslate); }
.rb-techniques-head .num {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.rb-techniques-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.rb-technique {
  background: var(--bg);
  padding: 40px 36px 44px;
  transition: background 0.3s;
}
.rb-technique:hover { background: #1A1E25; }
.rb-technique .badge {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--rbrust);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(184,90,42,0.3);
  display: inline-block;
  padding-right: 18px;
}
.rb-technique h4 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: 28px;
  line-height: 1.12;
  letter-spacing: -0.005em;
  margin: 0 0 16px;
  color: var(--ink);
}
.rb-technique p {
  font-family: "DM Sans", sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 0;
}

/* ===== Related cross-links ===== */
.rb-related {
  padding: 100px 0;
  background: #141519;
  border-bottom: 1px solid var(--rule);
}
.rb-related-wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}
.rb-related-col h3 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(34px, 3.6vw, 52px);
  line-height: 1;
  letter-spacing: -0.015em;
  margin: 0 0 28px;
  color: var(--ink);
}
.rb-related-col h3 em { font-style: italic; color: var(--rbslate); }
.rb-related-list { border-top: 1px solid var(--rule); }
.rb-related-list .row {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 18px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  transition: padding 0.2s, color 0.2s;
}
.rb-related-list .row:hover { padding-left: 8px; }
.rb-related-list .row .n {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink-mute);
}
.rb-related-list .row .t {
  font-family: "Playfair Display", serif;
  font-size: 22px;
  line-height: 1.2;
  color: var(--ink);
  letter-spacing: 0.005em;
}
.rb-related-list .row .ct {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  white-space: nowrap;
}
.rb-related-list .row:hover .t { color: var(--rbslate); font-style: italic; }
.rb-related-list .row.current .t { color: var(--rbrust); font-style: italic; }
.rb-related-list .row.current .ct { color: var(--rbrust); }

/* ===== Colophon ===== */
.rb-colophon {
  padding: 110px 56px 130px;
  background: var(--bg);
  text-align: center;
  border-bottom: 1px solid var(--rule);
}
.rb-colophon h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(48px, 5.2vw, 80px);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  color: var(--ink);
}
.rb-colophon h2 em { font-style: italic; color: var(--rbslate); }
.rb-colophon p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 auto 32px;
}
.rb-colophon .go {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--rbrust);
  text-decoration: none;
  border: 1px solid var(--rbrust);
  padding: 18px 32px;
  transition: background 0.2s, color 0.2s;
}
.rb-colophon .go:hover { background: var(--rbrust); color: #EEF4F8; }

/* ===== Dots helper ===== */
.rb-dots { display: inline-flex; gap: 5px; }
.rb-dots .d { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }

/* ===== section-folio helper ===== */
.section-folio {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 36px;
}
.section-folio .pg { color: var(--rbslate); }

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .rb-cover { grid-template-columns: 1fr; gap: 28px; padding: 36px; }
  .rb-cover .meta { grid-template-columns: repeat(2, 1fr); }
  .rb-top5-head { grid-template-columns: 1fr; }
  .rb-top5-row { grid-template-columns: 60px 1fr; }
  .rb-top5-row .stats { grid-column: 1 / -1; padding-left: 0; border-left: none; border-top: 1px solid var(--rule); padding-top: 16px; }
  .rb-essay-grid { grid-template-columns: 1fr; gap: 40px; }
  .rb-essay-side { position: static; }
  .rb-tools-grid { grid-template-columns: repeat(2, 1fr); }
  .rb-tools-head { grid-template-columns: 1fr; }
  .rb-categories-grid { grid-template-columns: repeat(2, 1fr); }
  .rb-mistakes-grid { grid-template-columns: 1fr; }
  .rb-techniques-grid { grid-template-columns: 1fr; }
  .rb-techniques-head { grid-template-columns: 1fr; }
  .rb-related-wrap { grid-template-columns: 1fr; gap: 48px; }
  .rb-faq { padding-left: 24px; padding-right: 24px; }
}

@media (max-width: 640px) {
  .rb-mast { padding: 16px 20px 12px; }
  .rb-mast .right { display: none; }
  .rb-cover { padding: 24px 24px 40px; }
  .rb-cover .meta { grid-template-columns: 1fr 1fr; }
  .rb-top5-wrap, .rb-tools-wrap, .rb-categories-wrap,
  .rb-mistakes-wrap, .rb-sequence-wrap, .rb-techniques-wrap, .rb-related-wrap { padding: 0 24px; }
  .rb-essay-wrap { padding: 0 24px; }
  .rb-tools-grid { grid-template-columns: 1fr; }
  .rb-categories-grid { grid-template-columns: 1fr; }
  .rb-mistakes-grid { grid-template-columns: 1fr; }
  .rb-colophon { padding: 80px 24px 100px; }
}