/* ===== /how-to · backsplash leaf — Owner's manual editorial ===== */

.ht {
  --htink: var(--ink);
  --htsoft: var(--ink-soft);
  --htmute: var(--ink-mute);
  --htrule: var(--rule);
  --htaccent: #C8A164;        /* brass — same family as install-kitchen */
  --htpaper: #15130F;
  --htpaper-soft: #1A1813;
}

/* ===== Masthead band — small, owner's-manual ===== */
.ht-mast {
  background: var(--bg, #100E0B);
  border-bottom: 1px solid var(--rule);
  position: relative;
  z-index: 5;
}
.ht-mast-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 56px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.ht-mast-l { display: flex; gap: 18px; }
.ht-mast-l .vol { color: var(--terracotta); }
.ht-mast-c { display: flex; gap: 10px; align-items: center; justify-content: center; color: var(--ink-mute); }
.ht-mast-c a { color: var(--ink-soft); text-decoration: none; border-bottom: 1px dotted var(--rule); }
.ht-mast-c a:hover { color: var(--ink); border-bottom-color: var(--terracotta); }
.ht-mast-c .cur { color: var(--htaccent); font-style: italic; font-family: "Playfair Display", serif; font-size: 13px; letter-spacing: 0.04em; text-transform: none; }
.ht-mast-r { display: flex; gap: 12px; justify-content: flex-end; align-items: center; }
.ht-mast-r .dot { color: var(--terracotta); font-size: 8px; }

/* ===== Folio rule — small repeating section header ===== */
.ht-folio {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0 0 10px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--rule);
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.ht-folio .left { color: var(--terracotta); }
.ht-folio .right { color: var(--ink-mute); letter-spacing: 0.32em; }

/* ===== Opener — type only, no hero image ===== */
.ht-opener {
  padding: 60px 0 80px;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.ht-opener-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-opener-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: end;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--rule);
}
.ht-opener-side {
  display: flex; flex-direction: column;
  gap: 32px;
  position: relative;
}
.ht-opener-side .kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--terracotta);
  display: flex;
  align-items: center;
  gap: 14px;
}
.ht-opener-side .kicker::before {
  content: "";
  display: inline-block;
  width: 28px; height: 1px;
  background: var(--terracotta);
}

/* The "field manual" stamp — looks like a passport stamp */
.manual-stamp {
  display: inline-flex;
  align-items: stretch;
  border: 2px solid var(--htaccent);
  border-radius: 2px;
  padding: 14px 18px;
  background: rgba(200, 161, 100, 0.04);
  width: fit-content;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.18em;
  color: var(--htaccent);
  text-transform: uppercase;
  position: relative;
  transform: rotate(-1.5deg);
}
.manual-stamp::after {
  content: "";
  position: absolute;
  inset: -4px;
  border: 1px solid var(--htaccent);
  opacity: 0.4;
  border-radius: 4px;
  pointer-events: none;
}
.manual-stamp .ms-l {
  font-size: 13px;
  line-height: 1.05;
  display: inline-block;
  padding-right: 14px;
  border-right: 1px solid rgba(200,161,100,0.5);
  font-weight: 500;
}
.manual-stamp .ms-r {
  display: flex; flex-direction: column;
  padding-left: 14px;
  justify-content: center;
}
.manual-stamp .ms-num {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 22px;
  letter-spacing: 0.02em;
  text-transform: none;
  line-height: 1;
  margin-bottom: 4px;
}
.manual-stamp .ms-cat {
  font-size: 10px;
  letter-spacing: 0.32em;
}

/* The big headline */
.ht-opener-main h1 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(56px, 6.6vw, 104px);
  line-height: 0.94;
  letter-spacing: -0.022em;
  margin: 0 0 28px;
  color: var(--ink);
  max-width: 16ch;
}
.ht-opener-main h1 em {
  font-style: italic;
  color: var(--htaccent);
}
.ht-opener-main .standfirst {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: clamp(19px, 1.4vw, 22px);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 64ch;
  margin: 0 0 26px;
  padding-left: 18px;
  border-left: 2px solid rgba(200,161,100,0.5);
}
.ht-opener-main .byline {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: center;
}
.ht-opener-main .byline em {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 14px;
  color: var(--ink);
  letter-spacing: 0.02em;
  text-transform: none;
}
.ht-opener-main .byline .bar { color: var(--rule); }

/* Stat stripe — six cells */
.ht-opener-stripe {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
}
.ht-opener-stripe .cell {
  padding: 18px 18px 20px;
  border-right: 1px solid var(--rule);
  display: flex; flex-direction: column;
  gap: 4px;
  background: var(--bg);
}
.ht-opener-stripe .cell:last-child { border-right: none; }
.ht-opener-stripe .cell .k {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.ht-opener-stripe .cell .v {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 22px;
  color: var(--ink);
  letter-spacing: 0.005em;
  margin: 2px 0 4px;
}
.ht-opener-stripe .cell .m {
  font-family: "DM Sans", sans-serif;
  font-size: 11px;
  color: var(--ink-mute);
  line-height: 1.4;
}
.ht-opener-stripe .cell .dots {
  display: inline-flex; gap: 4px;
  margin-top: 4px;
}
.ht-opener-stripe .cell .dots i {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: rgba(239,229,207,0.18);
}
.ht-opener-stripe .cell .dots i.on {
  background: var(--htaccent);
}

/* ===== Index of contents ===== */
.ht-toc {
  padding: 80px 0;
  background: var(--htpaper);
  border-bottom: 1px solid var(--rule);
}
.ht-toc-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-toc-head {
  margin: 0 0 36px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: end;
  gap: 48px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.ht-toc-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(48px, 5vw, 76px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}
.ht-toc-head p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
  max-width: 48ch;
}
.ht-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 56px;
  border-top: 1px solid var(--rule);
}
.ht-toc-list li {
  border-bottom: 1px solid var(--rule);
}
.ht-toc-list a {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding: 16px 0;
  text-decoration: none;
  color: var(--ink);
  transition: padding 0.2s, color 0.2s;
}
.ht-toc-list a:hover { padding-left: 8px; color: var(--htaccent); }
.ht-toc-list .n {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--terracotta);
}
.ht-toc-list .t {
  font-family: "Playfair Display", serif;
  font-size: 19px;
  letter-spacing: 0.005em;
}
.ht-toc-list .dots-line {
  display: none;
}
.ht-toc-list .m {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  white-space: nowrap;
}

/* ===== Lede / set-up ===== */
.ht-lede {
  padding: 90px 0 100px;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.ht-lede-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-lede-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 80px;
  align-items: start;
  margin-top: 16px;
}
.ht-lede-side {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.ht-margin-note {
  border-left: 2px solid var(--htaccent);
  padding: 10px 0 10px 18px;
  background: rgba(200,161,100,0.04);
  padding-right: 16px;
  border-radius: 0 2px 2px 0;
}
.ht-margin-note .mn-label {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--htaccent);
  margin-bottom: 8px;
}
.ht-margin-note p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
}
.ht-lede-body {
  font-family: "Playfair Display", serif;
  font-size: 19px;
  line-height: 1.65;
  color: var(--ink);
  max-width: 64ch;
}
.ht-lede-body p { margin: 0 0 22px; }
.ht-lede-body p.dropcap::first-letter {
  font-size: 84px;
  font-style: italic;
  font-weight: 500;
  float: left;
  line-height: 0.88;
  padding: 6px 16px 0 0;
  color: var(--htaccent);
  font-family: "Playfair Display", serif;
}
.ht-lede-body em { color: var(--htaccent); font-style: italic; }
.ht-lede-body p.callout {
  font-style: italic;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.4;
  border-top: 1px solid rgba(200,161,100,0.4);
  border-bottom: 1px solid rgba(200,161,100,0.4);
  padding: 18px 0;
  margin: 28px 0;
  text-align: center;
}

/* ===== Bill of materials ===== */
.ht-bom {
  padding: 90px 0;
  background: var(--htpaper);
  border-bottom: 1px solid var(--rule);
}
.ht-bom-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-bom-head {
  margin: 0 0 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.ht-bom-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 4.4vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.018em;
  margin: 0 0 10px;
  color: var(--ink);
}
.ht-bom-head p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
  max-width: 56ch;
}
.ht-bom-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
}
.ht-bom-col {
  border-top: 1px solid var(--rule);
}
.ht-bom-coltitle {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 14px 0 12px;
  border-bottom: 1px solid var(--rule);
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
.ht-bom-coltitle .lbl { color: var(--terracotta); }
.ht-bom-coltitle .ct { color: var(--ink-mute); }

.ht-bom-table {
  width: 100%;
  border-collapse: collapse;
  font-family: "DM Sans", sans-serif;
  font-size: 14px;
}
.ht-bom-table th {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 400;
  text-align: left;
  padding: 12px 14px 10px 0;
  border-bottom: 1px solid var(--rule);
}
.ht-bom-table th:last-child { text-align: right; }
.ht-bom-table td {
  padding: 12px 14px 12px 0;
  border-bottom: 1px dashed var(--rule);
  vertical-align: baseline;
  color: var(--ink);
}
.ht-bom-table td:last-child { text-align: right; }
.ht-bom-table td.item {
  font-family: "Playfair Display", serif;
  font-size: 16px;
  color: var(--ink);
}
.ht-bom-table td.qty {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--htaccent);
  white-space: nowrap;
}
.ht-bom-table td.note {
  font-size: 12px;
  color: var(--ink-mute);
  font-style: italic;
}
.ht-bom-table td.price {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.ht-bom-table tr.total td {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 16px;
  color: var(--ink);
  padding-top: 18px;
  border-bottom: none;
  border-top: 1px solid var(--rule);
}
.ht-bom-table tr.total td.price {
  font-family: "Playfair Display", serif;
  font-size: 20px;
  color: var(--htaccent);
}

.ht-tool-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.ht-tool-list li {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dashed var(--rule);
  font-family: "DM Sans", sans-serif;
  color: var(--ink);
}
.ht-tool-list .check {
  font-family: "JetBrains Mono", monospace;
  color: var(--ink-mute);
  font-size: 13px;
}
.ht-tool-list li.own .check {
  color: var(--htaccent);
}
.ht-tool-list li .item {
  font-family: "Playfair Display", serif;
  font-size: 16px;
  color: var(--ink);
}
.ht-tool-list li .sub {
  font-size: 11px;
  font-style: italic;
  color: var(--ink-mute);
  font-family: "Playfair Display", serif;
}

/* ===== Steps ===== */
.ht-steps {
  padding: 90px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.ht-steps-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-steps-head {
  margin: 0 0 48px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.ht-steps-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 12px;
  color: var(--ink);
}
.ht-steps-head p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
}
.ht-steps-list {
  display: flex;
  flex-direction: column;
}
.ht-step {
  display: grid;
  grid-template-columns: 220px 1fr 360px;
  gap: 40px;
  padding: 56px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.ht-step:last-child { border-bottom: none; }

.ht-step-meta {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 80px;
}
.ht-step-meta .phase {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--terracotta);
}
.ht-step-meta .num {
  font-family: "Playfair Display", serif;
  font-size: 96px;
  font-style: italic;
  line-height: 0.85;
  color: var(--htaccent);
  letter-spacing: -0.025em;
  display: flex;
  align-items: baseline;
}
.ht-step-meta .num span {
  font-size: 36px;
  margin-right: 6px;
  color: var(--ink-mute);
  font-style: normal;
  font-family: "Playfair Display", serif;
}
.ht-step-meta .rule {
  width: 60px;
  height: 1px;
  background: var(--htaccent);
}
.ht-step-meta .time {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.ht-step-body h3 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(30px, 3.2vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 18px;
  color: var(--ink);
  max-width: 22ch;
}
.ht-step-body p {
  font-family: "Playfair Display", serif;
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0 0 22px;
}
.ht-step-body em { color: var(--htaccent); font-style: italic; }

.ht-step-tip {
  border: 1px solid rgba(200,161,100,0.4);
  border-left: 3px solid var(--htaccent);
  padding: 16px 18px;
  background: rgba(200,161,100,0.04);
  margin-top: 16px;
}
.ht-step-tip .lbl {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--htaccent);
  margin-bottom: 8px;
}
.ht-step-tip p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  margin: 0;
}

/* Figure with corner crosses */
.ht-step-fig {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 80px;
}
.fig-frame {
  position: relative;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--rule);
  background: var(--htpaper);
  overflow: hidden;
}
.fig-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.05) sepia(0.08);
}
.fig-frame::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(239,229,207,0.08) 0%, rgba(239,229,207,0.18) 100%),
    radial-gradient(ellipse at center, transparent 55%, rgba(16,14,11,0.18) 100%);
  pointer-events: none;
  mix-blend-mode: multiply;
}
.fig-label {
  position: absolute;
  top: 10px;
  left: 12px;
  padding: 3px 8px;
  background: rgba(16,14,11,0.78);
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--htpaper);
  z-index: 2;
}
.fig-corner {
  position: absolute;
  font-family: "JetBrains Mono", monospace;
  color: var(--htaccent);
  font-size: 14px;
  opacity: 0.95;
  text-shadow: 0 0 6px rgba(16,14,11,0.6);
  z-index: 2;
}
.fig-corner.tl { top: 6px; left: 8px; }
.fig-corner.tr { top: 6px; right: 8px; }
.fig-corner.bl { bottom: 6px; left: 8px; }
.fig-corner.br { bottom: 6px; right: 8px; }
.ht-step-fig figcaption {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 13px;
  color: var(--ink-mute);
  text-align: center;
  line-height: 1.4;
  padding: 0 8px;
}

/* ===== Troubleshooting ===== */
.ht-trouble {
  padding: 90px 0;
  background: var(--htpaper);
  border-bottom: 1px solid var(--rule);
}
.ht-trouble-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-trouble-head {
  margin: 0 0 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.ht-trouble-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 4.4vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.018em;
  margin: 0 0 10px;
  color: var(--ink);
}
.ht-trouble-head p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0;
  max-width: 60ch;
}
.ht-trouble-grid {
  border-top: 1px solid var(--rule);
}
.ht-trouble-row {
  display: grid;
  grid-template-columns: 60px 1fr 1.4fr;
  gap: 32px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.ht-trouble-row .num {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 32px;
  color: var(--htaccent);
  line-height: 1;
}
.ht-trouble-row .prob,
.ht-trouble-row .ans {
  font-family: "Playfair Display", serif;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
}
.ht-trouble-row .prob strong,
.ht-trouble-row .ans strong {
  font-family: "JetBrains Mono", monospace;
  font-style: normal;
  font-weight: 400;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--terracotta);
  display: inline-block;
  margin-right: 8px;
}
.ht-trouble-row .ans strong { color: var(--htaccent); }
.ht-trouble-row .ans { color: var(--ink-soft); }

/* ===== Reader notes ===== */
.ht-notes {
  padding: 90px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.ht-notes-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-notes-head {
  margin: 0 0 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.ht-notes-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 4.4vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.018em;
  margin: 0 0 10px;
  color: var(--ink);
}
.ht-notes-head p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0;
  max-width: 60ch;
}
.ht-notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.ht-note {
  background: var(--bg);
  padding: 22px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 200px;
}
.ht-note .meta {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--rule);
}
.ht-note .meta .who { color: var(--htaccent); font-family: "Playfair Display", serif; font-style: italic; font-size: 14px; letter-spacing: 0.02em; text-transform: none; }
.ht-note .meta .when { color: var(--terracotta); }
.ht-note p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  margin: 0;
}

/* ===== Sideways block ===== */
.ht-sideways {
  padding: 90px 0;
  background: var(--htpaper);
  border-bottom: 1px solid var(--rule);
}
.ht-sideways-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}
.ht-sideways-head {
  margin: 0 0 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.ht-sideways-head h2 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(40px, 4.6vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.018em;
  margin: 0 0 10px;
  color: var(--ink);
}
.ht-sideways-head p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 17px;
  color: var(--ink-soft);
  margin: 0;
  max-width: 70ch;
}
.ht-sideways-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 56px;
}
.ht-side-block .kicker {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}
.ht-side-block.back .kicker { color: var(--htaccent); }
.ht-side-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.ht-side-list li {
  border-bottom: 1px solid var(--rule);
}
.ht-side-list a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  text-decoration: none;
  color: var(--ink);
  transition: padding 0.2s, color 0.2s;
}
.ht-side-list a:hover { padding-left: 6px; }
.ht-side-list .t {
  font-family: "Playfair Display", serif;
  font-size: 18px;
  line-height: 1.25;
  color: var(--ink);
}
.ht-side-list a:hover .t { color: var(--htaccent); font-style: italic; }
.ht-side-block.back .ht-side-list a:hover .t { color: var(--terracotta); }
.ht-side-list .m {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ===== End / colophon ===== */
.ht-end {
  padding: 100px 0 0;
  background: var(--bg);
}
.ht-end-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--rule);
}
.ht-end-cred {
  border-top: 1px solid var(--rule);
  padding-top: 8px;
}
.ht-end-cred .line {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--rule);
  font-family: "DM Sans", sans-serif;
  font-size: 14px;
}
.ht-end-cred .k {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.ht-end-cred .v {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 15px;
  color: var(--ink);
}
.ht-end-cta h3 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
  color: var(--ink);
  max-width: 14ch;
}
.ht-end-cta h3 em { font-style: italic; color: var(--htaccent); }
.ht-end-cta p {
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 28px;
  max-width: 50ch;
}
.ht-end-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.ht-end-btns .btn {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 16px 24px;
  border: 1px solid;
  transition: background 0.2s, color 0.2s;
}
.ht-end-btns .btn.primary {
  border-color: var(--terracotta);
  color: var(--terracotta);
}
.ht-end-btns .btn.primary:hover { background: var(--terracotta); color: #FFF7E5; }
.ht-end-btns .btn.ghost {
  border-color: var(--rule);
  color: var(--ink-soft);
}
.ht-end-btns .btn.ghost:hover { color: var(--ink); border-color: var(--htaccent); }

.ht-end-bottom {
  text-align: center;
  padding: 36px 0;
  font-family: "Playfair Display", serif;
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .ht-mast-inner { grid-template-columns: 1fr; gap: 6px; padding: 12px 24px; text-align: center; }
  .ht-mast-l, .ht-mast-c, .ht-mast-r { justify-content: center; }
  .ht-opener-grid { grid-template-columns: 1fr; gap: 36px; }
  .ht-opener-stripe { grid-template-columns: repeat(2, 1fr); }
  .ht-opener-stripe .cell { border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
  .ht-opener-stripe .cell:nth-child(2n) { border-right: none; }
  .ht-toc-list { grid-template-columns: 1fr; }
  .ht-toc-head { grid-template-columns: 1fr; gap: 16px; }
  .ht-lede-grid { grid-template-columns: 1fr; }
  .ht-lede-side { position: static; flex-direction: row; flex-wrap: wrap; }
  .ht-margin-note { flex: 1 1 280px; }
  .ht-bom-grid { grid-template-columns: 1fr; gap: 40px; }
  .ht-step { grid-template-columns: 1fr; gap: 24px; }
  .ht-step-meta, .ht-step-fig { position: static; }
  .ht-step-meta { flex-direction: row; align-items: baseline; flex-wrap: wrap; gap: 18px; }
  .ht-step-meta .num { font-size: 64px; }
  .ht-trouble-row { grid-template-columns: 40px 1fr; }
  .ht-trouble-row .ans { grid-column: 2; }
  .ht-notes-grid { grid-template-columns: 1fr; }
  .ht-sideways-grid { grid-template-columns: 1fr; gap: 36px; }
  .ht-end-wrap { grid-template-columns: 1fr; gap: 48px; }
}
@media (max-width: 640px) {
  .ht-opener-wrap, .ht-toc-wrap, .ht-lede-wrap, .ht-bom-wrap,
  .ht-steps-wrap, .ht-trouble-wrap, .ht-notes-wrap, .ht-sideways-wrap, .ht-end-wrap {
    padding-left: 20px;
    padding-right: 20px;
  }
  .ht-opener-stripe { grid-template-columns: repeat(2, 1fr); }
  .ht-step-meta .num { font-size: 48px; }
}