/* v0.4: one introduction, working area, then the complete reading surface. */
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin: 15px 5px 20px; color: var(--body); font: 11px/1.5 var(--label-font); text-transform: uppercase; }
.breadcrumb a { display: inline-flex; align-items: center; min-height: 32px; text-decoration: underline; text-underline-offset: 4px; }
.detail-main { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(315px, .85fr); grid-template-areas: "overview bench" "chapters bench"; grid-template-rows: auto 1fr; align-items: start; gap: 13px; margin-top: 13px; }
.detail-main > .reading-intro { grid-area: overview; margin: 0; }
.detail-main > .workbench { grid-area: bench; align-self: start; min-width: 0; }
.detail-main > .detail-chapters { grid-area: chapters; min-width: 0; }
.reading-panel { position: relative; min-width: 0; margin-bottom: 13px; padding: clamp(27px, 3.3vw, 43px); border-radius:var(--radius); }
.reading-panel .eyebrow { margin-bottom: 22px; font-size: 11px; line-height: 1.5; }
.reading-panel .reading-kicker { display: flex; align-items: baseline; gap: 14px; margin-bottom: 16px; color: #5d656a; font-size: 10px; }
.reading-kicker .chapter-number { color: var(--ink); font-size: 13px; }
.reading-panel h2 { margin: 0 0 18px; font-size: clamp(31px, 3.1vw, 44px); text-transform: lowercase; overflow-wrap: break-word; }
.reading-panel h3 { margin-bottom: 18px; font-size: clamp(21px, 2.2vw, 32px); text-transform: lowercase; }
.reading-prose { max-width: 800px; }
.reading-panel p { margin: 0 0 19px; font-size: clamp(15px, 1.32vw, 18px); line-height: 1.62; letter-spacing: -.012em; overflow-wrap: break-word; }
.reading-panel p:last-child { margin-bottom: 0; }
.reading-panel ul, .reading-panel ol { margin: 18px 0 0; padding-left: 23px; }
.reading-panel li { margin-bottom: 12px; padding-left: 4px; font-size: clamp(14px, 1.18vw, 17px); line-height: 1.6; overflow-wrap: break-word; }
.reading-panel[id], #workbench { scroll-margin-top: 0; } /* Header clearance is owned by html scroll-padding. */
.reader-steps { display: grid; gap: 8px; padding: 0 !important; list-style: none; }
.reader-steps li { display: grid; grid-template-columns: 60px minmax(0, 1fr); gap: 16px; margin: 0; padding: 15px 0 5px; border-top: 1px solid var(--line); font-size: 16px; }
.reader-steps .stepno { font: 12px/1.5 var(--label-font); }
.reading-intro { container-type:inline-size; padding:clamp(24px,2.4vw,34px); }
.tool-identity { display:flex; align-items:baseline; justify-content:flex-start; flex-wrap:wrap; gap:5px 7px; color:var(--body); font:400 11px/1.45 var(--label-font); text-transform:uppercase; }
.tool-ident-meta { display:inline-flex; align-items:baseline; flex-wrap:wrap; min-width:0; gap:5px 7px; }
.tool-code { padding:0; border:0; border-radius:0; font:inherit; color:inherit; }
.reading-intro .intro-small-label { margin:0; color:var(--body); font:400 11px/1.45 var(--label-font); text-transform:uppercase; letter-spacing:0; }
.reading-intro .tool-intro-name { margin:14px 0 0; font-size:clamp(32px,6cqw,44px); line-height:1.08; letter-spacing:-.05em; text-transform:none; overflow-wrap:break-word; text-wrap:balance; }
.reading-intro .tool-intro-promise { max-width:690px; margin:0; font-size:20px; line-height:1.35; letter-spacing:-.025em; text-wrap:pretty; }
.intro-description { margin-top:20px; }
.reading-intro .intro-summary { max-width:68ch; margin:0; font-size:16px; line-height:20px; letter-spacing:-.01em; }
.reading-intro .tool-tagline { margin:9px 0 0; color:var(--body); font-size:14px; line-height:1.5; }
.intro-features { margin-top:20px; }
.reading-intro .intro-description h2, .reading-intro .intro-features h2 { margin:0 0 10px; font:700 13px/1.4 var(--label-font); color:var(--ink); letter-spacing:.025em; text-transform:uppercase; }
.reading-panel .version-line { font: 10px/1.6 var(--label-font); }
.essence-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; margin-top: 27px; }
.essence-card { min-width: 0; padding: 20px 19px; border: 1px solid var(--line); border-radius:var(--radius); background: #ffffff9e; }
.essence-card .eyebrow { margin-bottom: 16px; }
.essence-card p { margin: 0; font-size: 14px; line-height: 1.48; }
.reading-intro .essence-grid { display:grid; grid-template-columns:minmax(0,1fr); gap:4px; margin:0; }
.reading-intro .essence-card { display:grid; grid-template-columns:5px minmax(0,1fr); align-items:baseline; gap:10px; padding:0; border:0; border-radius:0; background:none; }
.reading-intro .essence-card::before { content:""; width:4px; height:4px; background:var(--body); border-radius:50%; align-self:start; margin-top:8px; }
.reading-intro .essence-card .eyebrow { display: block; margin: 0 0 8px; font-size: 10px; }
.reading-intro .essence-card p { margin:0; font-size:14px; line-height:1.5; letter-spacing:-.008em; }
.intro-actions { display:flex; align-items:center; flex-wrap:wrap; gap:10px; margin-top:21px; }
.intro-actions .btn { min-height:44px; padding:10px 13px; font-size:10px; }
.intro-index { margin-top:22px; padding-top:16px; border-top:1px solid #20212440; }
.reading-intro .intro-index .eyebrow { margin:0 0 4px; color:var(--body); font-size:10px; }
.chapter-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 22px; }
.chapter-link { display: flex; align-items: baseline; gap: 10px; min-width: 0; min-height: 44px; padding: 12px 0; border-bottom: 1px solid #20212440; font-size: 13px; line-height: 1.4; }
.chapter-link:hover, .chapter-link[aria-current="location"] { color: #183f53; }
.chapter-link[aria-current="location"] { text-decoration: underline; text-underline-offset: 3px; }
.chapter-link > span:not(.chapter-index) { min-width: 0; overflow-wrap: break-word; }
.chapter-index { flex: none; color: #39434a; font: 11px/1.45 var(--label-font); }
.surface-medium .chapter-index { color: var(--body); }
.chapter-link .chevron { align-self: center; width: 14px; height: 14px; margin-left: auto; }
.cover-bottom { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 35px; }
.start-last { margin-bottom: 0; }
.workbench { position: sticky; top: 91px; max-height: calc(100dvh - 110px); overflow: auto; border: 1px solid var(--ink); border-radius:var(--radius); background: var(--ink); color: var(--almost); scrollbar-width: thin; scrollbar-color: #a8adb2 #202124; }
.workbench :focus-visible { outline-color: var(--accent); }
.worktop { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 49px; padding: 12px 18px; border-bottom: 1px solid #67696b; background: #171819; color: #d1d6d9; font: 10px/1.5 var(--label-font); text-transform: uppercase; }
.worktop .num { color: var(--accent); }
.worktop .chevron { width: 12px; height: 12px; }
.work-content { padding: 20px; }
.work-content h2, .work-content h3 { margin: 0 0 12px; font-size: clamp(23px, 2vw, 32px); letter-spacing: -.05em; text-transform: lowercase; }
.work-content p { color: #c7cccf; font-size: 13px; line-height: 1.52; }
.bench-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 3px; margin: 18px 0 21px; border-bottom: 1px solid #747777; }
.bench-tabs button { min-width: 0; min-height: 44px; padding: 9px 4px 11px; border: 0; background: transparent; color: #b8bfc1; font: 10px/1.4 var(--label-font); text-transform: uppercase; }
.bench-tabs button[aria-selected="true"] { box-shadow: inset 0 -3px var(--accent); color: var(--accent); }
.bench-label, .work-content .bench-label { display: block; margin-bottom: 8px; color: #bcc2c4; font: 11px/1.5 var(--label-font); text-transform: uppercase; }
.bench-pick { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 15px; }
.bench-pick button { min-height: 36px; padding: 8px 10px; border: 1px solid #686c6e; border-radius:var(--radius); background: transparent; color: #e3e5e6; font: 10px/1.3 var(--label-font); text-align: left; }
.bench-pick button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent); color: var(--ink); }
.workbench textarea { display: block; width: 100%; min-height: 128px; resize: vertical; padding: 13px; border: 1px solid #85898c; border-radius:var(--radius); background: #2e3133; color: #f5f5f5; font-size: 13px; line-height: 1.53; }
.workbench textarea::placeholder { color: #b0b7ba; }
.workbench .form-error { margin: 10px 0; color: #ffd2c9; font-size: 13px; }
.benchbtn { width: 100%; min-height: 52px; margin-top: 13px; font-size: 11px; }
.output-panel { margin-top: 17px; padding-top: 18px; border-top: 1px solid #63696b; }
.output-panel pre { max-height: 310px; overflow: auto; margin: 12px 0; padding: 14px; border: 1px solid #666b6e; border-radius:var(--radius); background: #292b2d; color: #e8e9e8; font: 12px/1.55 Arial, Helvetica, sans-serif; white-space: pre-wrap; overflow-wrap: anywhere; }
.output-panel .btn { width: 100%; min-height: 43px; padding: 10px 12px; font-size: 10px; }
.bench-steps { padding: 0; margin: 16px 0 0; list-style: none; }
.bench-steps li { display: flex; gap: 12px; padding: 11px 0; border-top: 1px solid #565d5f; font-size: 13px; line-height: 1.5; }
.bench-steps .num { flex: none; color: var(--accent); font-size: 10px; }
.bench-steps + h3 { margin-top: 24px; }
.bench-example { border-top: 1px solid #5e6264; padding: 10px 0; }
.bench-example summary { min-height: 44px; padding: 10px 0; cursor: pointer; font-size: 14px; line-height: 1.5; }
.bench-example p { margin-top: 12px; }
.bench-example-link { gap: 9px; margin-top: 8px; font-size: 10px; }
.bench-example-link .chevron { width: 14px; height: 14px; }
.format-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 9px; padding: 12px 0; border-top: 1px solid #5e6264; }
.format-row b { font-size: 13px; font-weight: 400; }
.format-row span { display: block; color: #adb5b8; font: 10px/1.4 var(--label-font); }
.format-row button { display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 8px 11px; border: 1px solid #e0e1e2; border-radius:var(--radius); background: transparent; color: var(--paper); font: 10px/1.4 var(--label-font); }
.format-row button .chevron { width: 13px; height: 13px; }
.bench-matrix { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; padding: 12px 0 16px; }
.bench-matrix button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; min-width: 0; min-height: 54px; padding: 7px 2px; border: 1px solid #717677; border-radius:var(--radius); background: #2d3032; color: #e6e7e8; font-size: 11px; text-align: center; }
.bench-matrix button span { color: #c6cacc; font: 9px/1.3 var(--label-font); }
.bench-matrix button.selected, .bench-matrix button[aria-pressed="true"] { border-color: var(--accent); background: #52513b; color: var(--paper); }
.bench-matrix button.selected span, .bench-matrix button[aria-pressed="true"] span { color: var(--accent); }
.triad-fields { min-width: 0; margin: 0; padding: 0; border: 0; }
.triad-fields legend { padding: 0; }
.matrix-route { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; min-height: 38px; padding: 6px 0 12px; color: var(--accent); font: 11px/1.4 var(--label-font); overflow-wrap: anywhere; }
.matrix-route .chevron { width: 12px; height: 12px; }
.bench-hint { margin-top: 10px; color: #adb5b8; font: 11px/1.55 Arial, Helvetica, sans-serif; }
.bench-hint strong { color: #e8e8e8; font-weight: 400; }
.modal-dialog { width: min(660px, calc(100% - 28px)); max-height: calc(100dvh - 28px); padding: 0; border: 0; border-radius:var(--radius); background: var(--paper); color: var(--ink); box-shadow: 0 26px 85px #0006; overscroll-behavior: contain; }
.modal-dialog::backdrop { background: #17181bcc; backdrop-filter: blur(5px); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 19px 26px; border-bottom: 1px solid #d1d3d4; }
.dialog-head .eyebrow { margin: 0; }
.dialog-head button { display: flex; align-items: center; flex: none; gap: 10px; min-height: 44px; padding: 5px 0; border: 0; background: none; font: 12px/1.4 var(--label-font); text-transform: uppercase; }
.dialog-main { max-height: 72dvh; overflow: auto; padding: 26px; }
.dialog-main h2 { margin-bottom: 14px; font-size: clamp(29px, 3vw, 44px); text-transform: lowercase; overflow-wrap: break-word; }
.dialog-main p { margin-bottom: 18px; color: var(--body); font-size: 14px; line-height: 1.5; }
.modal-options { display: grid; gap: 9px; margin-top: 20px; }
.modal-options button { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 50px; padding: 16px 17px; border: 1px solid #b3b9bd; border-radius:var(--radius); background: var(--almost); font: 12px/1.4 var(--label-font); text-transform: uppercase; text-align: left; }
.modal-options button:hover { background: var(--accent); }
.modal-options button small { color: var(--body); font: 11px/1.4 Arial, Helvetica, sans-serif; }
.modal-note { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 12px !important; }
.toast { pointer-events: none; position: fixed; z-index: 300; right: 26px; bottom: 22px; max-width: min(390px, calc(100vw - 32px)); padding: 13px 20px; border: 1px solid var(--paper); border-radius:var(--radius); background: var(--ink); color: var(--paper); box-shadow: 0 12px 20px #0002; font: 12px/1.45 var(--label-font); }
@media (max-width: 1240px) {
  .detail-main { grid-template-columns: minmax(0, 1.25fr) 312px; }
}
@media (max-width: 1060px) {
  .detail-main { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto; grid-template-areas: "overview" "bench" "chapters"; }
  .detail-main > .workbench { position: static; max-height: none; overflow: visible; }
  .bench-tabs { max-width: 560px; }
  .bench-pick { max-width: 640px; }
  .workbench { overflow: hidden; }
  .bench-pick button, .format-row button { min-height: 44px; }
}
@media (max-width: 760px) {
  .essence-grid { grid-template-columns: minmax(0, 1fr); }
  .reading-intro .tool-intro-name { font-size:clamp(30px,7cqw,38px); }
  .intro-actions { gap: 9px; }
  .intro-actions .btn { flex: 1 1 auto; }
  .chapter-links { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 650px) {
  .reading-panel { padding: 28px 23px; }
  .reading-panel h2 { font-size: 34px; }
  .reading-panel p { font-size: 16px; }
  .reading-intro .intro-summary { font-size: 16px; }
  .reading-intro { padding:24px 20px; }
  .reading-intro .tool-intro-promise { font-size:19px; }
  .reader-steps li { grid-template-columns: 40px minmax(0, 1fr); font-size: 15px; }
  .work-content { padding: 20px 16px; }
  .workbench { border-radius:var(--radius); }
  .cover-bottom .btn { width: 100%; min-height: 49px; }
  .dialog-head { padding: 14px 20px; }
  .dialog-head .eyebrow { font-size: 10px; }
  .dialog-head button { font-size: 10px; }
  .dialog-main { padding: 24px 20px; }
  .toast { right: 16px; bottom: 16px; }
}
@media (max-width: 470px) {
  .intro-actions .btn { width: 100%; }
  .tool-identity { font-size: 10px; }
}

/* Author direction, 15.10.2026: one compact reading surface after the intro.
   Keep chapter nodes and anchors intact for routes and manual reordering. */
.reading-chapter {
  display:grid; grid-template-columns:32px minmax(0,1fr); gap:11px 10px;
  margin:0; padding:23px 28px; border:1px solid #20212425;
  border-top:0; border-bottom:0; border-radius:0;
}
.reading-chapter:first-child { border-top:1px solid #20212425; border-radius:var(--radius) var(--radius) 0 0; }
.reading-chapter + .reading-chapter::before {
  content:""; position:absolute; left:28px; right:28px; top:0; border-top:1px solid #20212425;
}
.reading-chapter:has(+ .tool-delivery) { border-bottom:1px solid #20212425; border-radius:0 0 var(--radius) var(--radius); }
.reading-chapter .reading-kicker { grid-column:1; margin:0; line-height:1.4; }
.reading-chapter .chapter-number { font:700 16px/1.4 var(--label-font); color:var(--ink); }
.reading-chapter h2 { grid-column:2; margin:0; font-size:19px; line-height:1.25; font-weight:700; letter-spacing:-.025em; text-transform:none; }
.reading-chapter .reading-prose { grid-column:1/-1; max-width:800px; }
.reading-chapter .reading-prose p { margin:0 0 10px; font-size:15px; line-height:1.55; letter-spacing:-.008em; }
.reading-chapter .reading-prose p:last-child { margin-bottom:0; }
.reading-chapter .reading-prose ul { margin:10px 0 0; padding-left:20px; }
.reading-chapter .reading-prose li { margin:0 0 6px; padding-left:2px; font-size:15px; line-height:1.5; }
.reading-chapter .reading-prose li:last-child { margin-bottom:0; }

.tool-delivery { margin:13px 0; padding:22px 28px; border-radius:var(--radius); }
.tool-delivery h2 { margin:0 0 9px; font-size:19px; line-height:1.3; text-transform:none; letter-spacing:-.025em; }
.tool-delivery p { margin:0; font-size:14px; line-height:1.5; }
.tool-delivery .cover-bottom { gap:8px; margin-top:15px; }
.tool-delivery .btn { min-height:40px; padding:9px 12px; font-size:10px; }
.delivery-meta { display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:5px 15px; margin-top:10px; color:var(--body); font:10px/1.5 var(--label-font); }
.delivery-meta a { display:inline-flex; align-items:center; gap:6px; min-height:32px; text-decoration:underline; text-underline-offset:3px; }
.delivery-meta .chevron { width:13px; height:13px; }

.tool-guide { margin:0; padding:24px 28px; border:1px solid #20212425; border-radius:var(--radius); }
.guide-heading { display:flex; align-items:baseline; flex-wrap:wrap; gap:8px 14px; }
.tool-guide h2 { margin:0; font-size:22px; line-height:1.2; text-transform:none; letter-spacing:-.03em; }
.guide-stage, .guide-draft { font:10px/1.5 var(--label-font); color:var(--body); }
.tool-guide .guide-lead { margin:9px 0 17px; font-size:14px; line-height:1.5; color:var(--body); }
.tool-guide .tool-guide-steps { list-style:none; margin:0; padding:0; }
.tool-guide-steps > li { display:grid; grid-template-columns:22px minmax(0,1fr); gap:12px; margin:0; padding:16px 0; border-top:1px solid #20212425; }
.guide-step-number { font:700 13px/1.6 var(--label-font); color:var(--ink); }
.tool-guide h3 { margin:0 0 7px; font-size:16px; line-height:1.35; text-transform:none; letter-spacing:-.018em; }
.tool-guide p { margin:0 0 8px; font-size:14px; line-height:1.5; }
.tool-guide .guide-check { margin-top:8px; font-size:12.5px; color:var(--body); }
.guide-check strong { font-weight:600; }
.guide-help { margin-top:8px; }
.guide-help summary { min-height:32px; padding:5px 0; font-size:13px; line-height:1.5; cursor:pointer; }
.guide-help summary:hover { color:#244f70; }
.guide-help[open] summary { margin-bottom:5px; }
.guide-help p { padding-left:12px; border-left:2px solid var(--blue); }
.guide-action { display:inline-flex; align-items:center; gap:7px; min-height:36px; margin-top:6px; font-size:13px; text-decoration:underline; text-underline-offset:3px; }
.guide-action .chevron { width:14px; height:14px; }
.guide-action:hover { color:#244f70; }
.guide-install { margin-top:4px; padding-top:13px; border-top:1px solid #20212440; }
.guide-install summary { display:flex; align-items:baseline; flex-wrap:wrap; gap:5px 12px; min-height:36px; padding:5px 0; font-size:14px; font-weight:600; cursor:pointer; }
.guide-install summary::before { content:"+"; font:16px/1 var(--label-font); }
.guide-install[open] summary::before { content:"−"; }
.guide-install[open] summary { margin-bottom:9px; }
.guide-install .guide-draft { font-weight:400; }
.guide-install p { color:var(--body); font-size:13px; }
@media(max-width:650px) {
  .reading-chapter { padding:20px 19px; grid-template-columns:29px minmax(0,1fr); gap:10px 8px; }
  .reading-chapter + .reading-chapter::before { left:19px; right:19px; }
  .reading-chapter h2 { font-size:18px; }
  .reading-chapter .chapter-number { font-size:15px; }
  .tool-delivery, .tool-guide { padding:20px 19px; }
  .tool-delivery .cover-bottom .btn { width:auto; flex:1 1 auto; }
}