:root {
  --bg: #08131d;
  --bg-soft: #0d1c28;
  --panel: #102534;
  --paper: #f3f0e8;
  --paper-alt: #e9e5dc;
  --ink: #14232d;
  --muted: #687983;
  --light: #eef4f5;
  --line-dark: rgba(255,255,255,.12);
  --line-light: rgba(20,35,45,.15);
  --accent: #c7a35a;
  --accent-deep: #9f7d3d;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,19,29,.94);
  border-bottom: 1px solid var(--line-dark);
  backdrop-filter: blur(12px);
}
.nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--light); font-weight: 800; letter-spacing: .02em; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--accent); color: var(--accent); font-size: .84rem; letter-spacing: .1em; }
.brand-text { font-size: 1.15rem; }
.main-nav { display: flex; align-items: center; gap: 25px; color: #cbd6da; font-size: .93rem; }
.main-nav a:hover { color: white; }
.nav-contact { border: 1px solid var(--accent); padding: 8px 13px; color: var(--accent) !important; }
.menu-toggle { display: none; background: transparent; border: 0; color: white; font-size: 1.5rem; }

.hero {
  color: var(--light);
  background:
    linear-gradient(rgba(8,19,29,.94), rgba(8,19,29,.98)),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(255,255,255,.03) 80px),
    repeating-linear-gradient(0deg, transparent 0 79px, rgba(255,255,255,.03) 80px);
  padding: 110px 0 100px;
}
.hero-grid { display: grid; grid-template-columns: 1.5fr .8fr; gap: 80px; align-items: center; }
.eyebrow, .section-kicker { margin: 0 0 18px; text-transform: uppercase; letter-spacing: .18em; font-size: .76rem; font-weight: 800; color: var(--accent-deep); }
.hero .eyebrow { color: var(--accent); }
.hero h1 { margin: 0; font-size: clamp(2.7rem, 6vw, 5.4rem); line-height: .98; letter-spacing: -.045em; max-width: 850px; }
.hero h1 span { color: var(--accent); }
.hero-lead { margin: 34px 0 14px; max-width: 760px; font-size: 1.25rem; color: #d8e1e4; }
.hero-text { max-width: 740px; color: #aebcc2; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; padding: 12px 18px; font-weight: 800; cursor: pointer; transition: .2s ease; }
.button.primary { background: var(--accent); color: #111a20; }
.button.primary:hover { background: #d4b36f; transform: translateY(-1px); }
.button.secondary { border-color: #6f8088; color: white; }
.button.secondary:hover { border-color: var(--accent); color: var(--accent); }
.hero-panel { border: 1px solid var(--line-dark); background: rgba(255,255,255,.025); padding: 25px; box-shadow: 24px 24px 0 rgba(0,0,0,.12); }
.signal-line { display: grid; grid-template-columns: 45px 1fr; border-bottom: 1px solid var(--line-dark); padding: 14px 0; }
.signal-line span { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.signal-line strong { letter-spacing: .04em; }
.panel-footer { margin-top: 25px; color: var(--accent); font-size: .78rem; font-weight: 900; letter-spacing: .16em; }

.section { padding: 95px 0; }
.section-alt { background: var(--paper-alt); border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.two-column { display: grid; grid-template-columns: .85fr 1.35fr; gap: 85px; }
h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.08; letter-spacing: -.035em; }
.prose { font-size: 1.06rem; color: #334852; }
.prose p:first-child { margin-top: 0; }
.section-heading-row { display: grid; grid-template-columns: 1.4fr .8fr; gap: 50px; align-items: end; margin-bottom: 44px; }
.section-heading-row > p { margin: 0; color: var(--muted); max-width: 430px; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { min-height: 260px; background: #f8f6f0; border: 1px solid var(--line-light); padding: 26px; transition: .2s ease; }
.card:hover { transform: translateY(-3px); border-color: rgba(159,125,61,.55); }
.card-index { font-family: ui-monospace, monospace; color: var(--accent-deep); margin-bottom: 42px; }
.card h3 { margin: 0 0 12px; font-size: 1.28rem; }
.card p { margin: 0; color: #586a73; }

.timeline { border-top: 1px solid var(--line-light); }
.timeline-item { display: grid; grid-template-columns: 190px 1fr; gap: 45px; padding: 28px 0; border-bottom: 1px solid var(--line-light); }
.timeline-item time { font-family: ui-monospace, monospace; color: var(--accent-deep); font-weight: 700; }
.timeline-item h3 { margin: 0 0 5px; }
.timeline-item p { margin: 0; color: var(--muted); }
.timeline-item.muted { opacity: .72; }

.download-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.tab { border: 1px solid var(--line-light); background: transparent; padding: 10px 15px; cursor: pointer; font-weight: 800; color: #4e6069; }
.tab.active { background: var(--bg); color: white; border-color: var(--bg); }
.download-panel { display: none; }
.download-panel.active { display: block; }
.download-item { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; background: #f8f6f0; border: 1px solid var(--line-light); padding: 24px; margin-bottom: 12px; }
.download-item h3 { display: inline; margin: 0 0 5px 10px; }
.download-item p { margin: 8px 0 0; color: var(--muted); }
.file-type { display: inline-block; font-family: ui-monospace, monospace; font-size: .72rem; color: var(--accent-deep); font-weight: 900; letter-spacing: .08em; }
.status { white-space: nowrap; border: 1px solid var(--line-light); padding: 7px 10px; font-size: .78rem; color: #65747c; }

.manifesto { background: var(--bg); color: var(--light); padding: 75px 0; }
.manifesto-grid { display: grid; grid-template-columns: .5fr 1.5fr .7fr; gap: 50px; align-items: center; }
.manifesto .section-kicker { color: var(--accent); }
.manifesto blockquote { margin: 0; font-family: Georgia, serif; font-size: clamp(1.8rem, 3.3vw, 3rem); line-height: 1.2; }
.manifesto > p, .manifesto-grid > p:last-child { color: #aebcc2; }

.contact-section { background: #f7f5ef; }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; }
.contact-intro { font-size: 1.08rem; color: var(--muted); max-width: 500px; }
.contact-note { margin-top: 30px; border-left: 3px solid var(--accent); padding-left: 18px; display: grid; gap: 4px; }
.contact-form { display: grid; gap: 18px; }
.contact-form label { display: grid; gap: 7px; font-weight: 800; font-size: .9rem; }
.optional { color: #849299; font-weight: 500; }
input, textarea { width: 100%; border: 1px solid #c9c5bb; background: white; color: var(--ink); padding: 12px; outline: none; }
input:focus, textarea:focus { border-color: var(--accent-deep); box-shadow: 0 0 0 2px rgba(159,125,61,.12); }
textarea { resize: vertical; }
.form-note { margin: -3px 0 0; color: var(--muted); font-size: .82rem; }

.site-footer { background: #061019; color: #aebcc2; border-top: 1px solid var(--line-dark); padding: 42px 0; }
.footer-grid { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.footer-brand { color: white; font-size: 1.2rem; font-weight: 900; }
.site-footer p { margin: 5px 0 0; }
.footer-meta { display: flex; gap: 18px; flex-wrap: wrap; font-family: ui-monospace, monospace; font-size: .78rem; }

@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .main-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #08131d; padding: 18px 20px 26px; flex-direction: column; align-items: stretch; border-bottom: 1px solid var(--line-dark); }
  .main-nav.open { display: flex; }
  .hero-grid, .two-column, .section-heading-row, .contact-grid, .manifesto-grid { grid-template-columns: 1fr; gap: 35px; }
  .hero { padding-top: 75px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 70px 0; }
  .card-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 7px; }
  .download-item { grid-template-columns: 1fr; }
  .status { justify-self: start; }
  .footer-grid { flex-direction: column; align-items: flex-start; }
}

/* ==========================================================================\n   TargetDeLab Web 1.0.03 — DONT_TOUCH logo integration\n   Derived from the frozen 1.0.00 baseline.\n   ========================================================================== */
.brand-mark-image {
  overflow: hidden;
  background: #f3f0e8;
  border-color: rgba(199,163,90,.72);
}
.brand-mark-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.16);
}
.hero-panel {
  padding: 18px;
}
.hero-logo-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  margin-bottom: 18px;
  border: 1px solid rgba(199,163,90,.34);
  background: #f5f0e5;
  box-shadow: 0 14px 34px rgba(0,0,0,.24);
}
.hero-logo-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* Version 1.0.03: the supplied logo artwork is used exactly as provided.
   DONT_TOUCH: no HTML/CSS text overlay or artwork reconstruction. */
.principle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  column-gap: 18px;
}
.principle-grid .signal-line {
  grid-template-columns: 34px 1fr;
  padding: 10px 0;
  font-size: .88rem;
}

@media (max-width: 900px) {
  .hero-logo-card {
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (max-width: 480px) {
  .principle-grid { grid-template-columns: 1fr; }
}

/* Version 1.1.01 — privacy / telemetry UI */
.site-footer a,
.footer-link-button {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}
.footer-link-button {
  border: 0;
  padding: 0;
  background: transparent;
  font: inherit;
  cursor: pointer;
}
.privacy-banner[hidden] { display: none; }
.privacy-banner {
  position: fixed;
  z-index: 1000;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1rem;
  background: rgba(12, 14, 18, 0.97);
  border-top: 1px solid rgba(195, 151, 74, 0.45);
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.28);
}
.privacy-banner-inner {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
}
.privacy-banner strong { color: #fff; }
.privacy-banner p {
  margin: 0.35rem 0 0;
  color: rgba(255,255,255,0.8);
  max-width: 78ch;
}
.privacy-banner a { color: #e0bd73; }
.privacy-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.privacy-actions .button { white-space: nowrap; }
.privacy-page { min-height: 70vh; }
.privacy-copy { max-width: 900px; }
.privacy-copy h1 { margin-bottom: 1.5rem; }
.privacy-copy h2 { margin-top: 2rem; font-size: 1.2rem; }
.privacy-copy p { line-height: 1.75; }
.privacy-copy code { font-size: 0.95em; }
.privacy-nav { margin-left: auto; }

@media (max-width: 760px) {
  .privacy-banner-inner { grid-template-columns: 1fr; }
  .privacy-actions { justify-content: flex-start; }
  .privacy-actions .button { flex: 1 1 12rem; text-align: center; }
}


/* ==========================================================================\n   TargetDeLab Web 1.2.01 — Research & Repository Architecture\n   ========================================================================== */
.lab-index { background:#0d1c28; color:#eef4f5; border-top:1px solid var(--line-dark); border-bottom:1px solid var(--line-dark); }
.lab-index-grid { display:grid; grid-template-columns:repeat(4,1fr); }
.lab-index-grid > div { padding:24px 22px; border-right:1px solid var(--line-dark); display:grid; grid-template-columns:auto 1fr; column-gap:12px; align-items:baseline; }
.lab-index-grid > div:last-child { border-right:0; }
.lab-index-grid span { color:var(--accent); font-family:ui-monospace,monospace; font-size:.75rem; }
.lab-index-grid strong { font-size:1rem; }
.lab-index-grid small { grid-column:2; color:#91a3ab; margin-top:3px; }
.research-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:18px; }
.research-card { border:1px solid var(--line-light); background:#f8f6f0; padding:30px; min-height:285px; display:flex; flex-direction:column; }
.research-card.featured { border-top:4px solid var(--accent-deep); padding-top:27px; }
.research-code { font:800 .72rem/1.2 ui-monospace,monospace; letter-spacing:.08em; color:var(--accent-deep); margin-bottom:35px; }
.research-card h3 { margin:0 0 12px; font-size:1.55rem; }
.research-card p { color:#586a73; margin:0 0 20px; }
.capability-list { display:flex; flex-wrap:wrap; gap:7px; margin:0 0 22px; }
.capability-list span { border:1px solid var(--line-light); background:#fff; padding:6px 9px; font-size:.75rem; line-height:1.25; font-weight:700; color:#40545e; }
.research-card .research-example { font-size:.86rem; line-height:1.55; margin-top:2px; }
.research-links { margin-top:auto; display:flex; gap:18px; flex-wrap:wrap; font-size:.86rem; font-weight:800; }
.research-links a { color:var(--accent-deep); }
.catalogue-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.catalogue-card { background:#f8f6f0; border:1px solid var(--line-light); padding:25px; display:flex; flex-direction:column; min-height:330px; }
.catalogue-meta { display:flex; justify-content:space-between; gap:10px; font:800 .68rem/1.2 ui-monospace,monospace; letter-spacing:.06em; color:var(--accent-deep); }
.catalogue-card h3 { margin:42px 0 12px; font-size:1.45rem; }
.catalogue-card p { color:var(--muted); margin:0 0 25px; }
.catalogue-foot { margin-top:auto; padding-top:16px; border-top:1px solid var(--line-light); display:flex; justify-content:space-between; gap:12px; font-size:.78rem; color:#65747c; }
.catalogue-foot a { color:var(--accent-deep); font-weight:800; }
.resource-toolbar { display:flex; align-items:start; justify-content:space-between; gap:30px; margin-bottom:20px; }
.catalogue-note { margin:7px 0 0; color:var(--muted); font: .75rem/1.5 ui-monospace,monospace; text-align:right; }
.resource-item { display:grid; grid-template-columns:1fr 180px; gap:35px; background:#f8f6f0; border:1px solid var(--line-light); padding:28px; margin-bottom:14px; }
.resource-tags { display:flex; gap:7px; flex-wrap:wrap; margin-bottom:14px; }
.resource-tags span { border:1px solid #c9c5bb; padding:4px 7px; color:var(--accent-deep); font:800 .66rem/1.2 ui-monospace,monospace; letter-spacing:.05em; }
.resource-main h3 { margin:0 0 8px; font-size:1.35rem; }
.resource-main > p { color:var(--muted); margin:0 0 18px; max-width:780px; }
.resource-main dl { margin:0; display:flex; gap:30px; flex-wrap:wrap; }
.resource-main dl div { display:grid; grid-template-columns:auto auto; gap:7px; font-size:.78rem; }
.resource-main dt { font-weight:800; color:#344a55; }.resource-main dd { margin:0; color:#6b7a82; }
.resource-action { border-left:1px solid var(--line-light); padding-left:24px; display:flex; flex-direction:column; align-items:flex-start; justify-content:center; gap:10px; }
.resource-version { color:#7a888f; font: .72rem/1.4 ui-monospace,monospace; }
@media (max-width:1000px){ .main-nav{gap:14px;font-size:.84rem}.catalogue-grid{grid-template-columns:1fr 1fr}.lab-index-grid{grid-template-columns:1fr 1fr}.lab-index-grid>div:nth-child(2){border-right:0}.lab-index-grid>div:nth-child(-n+2){border-bottom:1px solid var(--line-dark)} }
@media (max-width:760px){ .research-grid,.catalogue-grid{grid-template-columns:1fr}.resource-toolbar{display:block}.catalogue-note{text-align:left}.resource-item{grid-template-columns:1fr}.resource-action{border-left:0;border-top:1px solid var(--line-light);padding:18px 0 0}.lab-index-grid{grid-template-columns:1fr}.lab-index-grid>div{border-right:0;border-bottom:1px solid var(--line-dark)!important}.lab-index-grid>div:last-child{border-bottom:0!important} }

/* v1.2.03 — publication profile prototype */
.catalogue-card-book { min-height: 470px; }
.book-card-cover { margin:-25px -25px 22px; height:180px; overflow:hidden; background:#e9e4d8; border-bottom:1px solid var(--line-light); }
.book-card-cover img { width:100%; height:100%; object-fit:cover; object-position:center 18%; display:block; }
.catalogue-card-book h3 { margin:22px 0 12px; }
.catalogue-tags { display:flex; flex-wrap:wrap; gap:6px; margin:0 0 22px; }
.catalogue-tags span,.book-profile-labels span,.theme-cloud span { border:1px solid #c9c1ae; padding:5px 8px; font:800 .64rem/1.2 ui-monospace,monospace; letter-spacing:.05em; }
.book-profile-section { background:#111a20; color:#f7f2e8; }
.book-profile-section .section-kicker { color:var(--accent); }
.book-profile-hero { display:grid; grid-template-columns:310px 1fr; gap:58px; align-items:center; padding:18px 0 62px; border-bottom:1px solid #3d4a50; }
.book-profile-cover { background:#eee6d8; padding:10px; box-shadow:0 24px 60px rgba(0,0,0,.25); }
.book-profile-cover img { display:block; width:100%; height:auto; }
.book-profile-labels { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:24px; }
.book-profile-labels span { border-color:#5c6c73; color:var(--accent); }
.book-profile-intro h2 { font-size:clamp(2.5rem,6vw,5.5rem); line-height:.94; margin:0 0 20px; max-width:820px; }
.book-subtitle { color:#d8c9aa; font-size:1.18rem; max-width:700px; }
.book-hook { font-size:1.3rem; line-height:1.55; max-width:780px; color:#d8dfe1; }
.book-profile-actions { display:flex; flex-wrap:wrap; align-items:center; gap:18px; margin-top:30px; }
.book-button { background:var(--accent); color:#111a20; }
.amazon-pending { color:#93a2a8; font:700 .72rem/1.4 ui-monospace,monospace; }
.book-profile-grid { display:grid; grid-template-columns:1fr 1fr; gap:18px; padding-top:38px; }
.book-profile-wide { grid-column:1/-1; }
.book-profile-block { border:1px solid #3d4a50; padding:30px; background:#172229; }
.profile-index { display:block; color:var(--accent); font:800 .68rem/1.2 ui-monospace,monospace; letter-spacing:.08em; margin-bottom:22px; }
.book-profile-block h3,.book-contents h3 { font-size:1.55rem; margin:0 0 16px; }
.book-profile-block p { color:#c7d0d3; }
.book-profile-block blockquote { margin:28px 0 0; padding-left:18px; border-left:3px solid var(--accent); font-size:1.6rem; font-weight:800; }
.reader-list { list-style:none; margin:0; padding:0; }
.reader-list li { padding:12px 0; border-top:1px solid #344148; display:grid; gap:4px; }
.reader-list li:first-child { border-top:0; }
.reader-list span { color:#aebbc0; font-size:.88rem; }
.book-contents { margin-top:18px; border:1px solid #3d4a50; padding:30px; }
.book-contents-head { display:grid; grid-template-columns:.7fr 1.3fr; gap:30px; align-items:start; }
.parts-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:#3d4a50; margin-top:26px; border:1px solid #3d4a50; }
.parts-grid>div { background:#111a20; padding:20px; display:grid; gap:7px; }
.parts-grid span { color:var(--accent); font:800 .65rem/1 ui-monospace,monospace; }
.parts-grid strong { font-size:1rem; }
.parts-grid small { color:#9eacb2; line-height:1.5; }
.book-profile-lower { padding-top:18px; }
.theme-cloud { display:flex; flex-wrap:wrap; gap:8px; }
.theme-cloud span { border-color:#526168; color:#d6dee0; }
.metadata-block dl { margin:0; }
.metadata-block dl div { display:grid; grid-template-columns:135px 1fr; gap:15px; padding:10px 0; border-top:1px solid #344148; }
.metadata-block dl div:first-child { border-top:0; }
.metadata-block dt { color:#92a1a7; font-size:.78rem; }
.metadata-block dd { margin:0; }
.book-closing { margin-top:18px; padding:36px; background:#f4efe4; color:#172229; }
.book-closing .profile-index { color:var(--accent-deep); }
.book-quotes { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.book-quotes blockquote { margin:0; font-size:clamp(1.5rem,3vw,2.7rem); font-weight:900; }
.book-closing>p { margin:30px 0 0; padding-top:20px; border-top:1px solid #cfc5b1; color:#5d6a70; font-size:.83rem; }
@media (max-width:800px){.book-profile-hero{grid-template-columns:1fr}.book-profile-cover{max-width:330px}.book-profile-grid,.parts-grid,.book-quotes,.book-contents-head{grid-template-columns:1fr}.book-profile-wide{grid-column:auto}.metadata-block dl div{grid-template-columns:1fr;gap:3px}}

/* v1.2.05 — Book 2 technical publication ecosystem */
.book-profile-view[hidden] { display:none !important; }
.control-cover img { object-position:center 8%; }
.study-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin-top:24px; }
.study-grid>div { display:grid; grid-template-columns:42px 1fr; gap:4px 14px; border-top:1px solid #3d4a50; padding:16px 0; }
.study-grid span { grid-row:1/3; color:var(--accent); font:800 .78rem/1.2 ui-monospace,monospace; }
.study-grid strong { color:#f7f2e8; }
.study-grid small { color:#9eacb1; }
.companion-note { margin-top:24px; }
.paper-series { margin-top:18px; padding:34px; background:#f4efe4; color:#172229; }
.paper-series-head { display:grid; grid-template-columns:.6fr 1.4fr; gap:18px 30px; align-items:start; border-bottom:1px solid #cfc5b1; padding-bottom:24px; }
.paper-series-head h3 { margin:0; font-size:1.7rem; }
.paper-series-head p { grid-column:2; margin:0; color:#5d6a70; }
.paper-list { margin-top:8px; }
.paper-item { display:grid; grid-template-columns:64px 1fr; gap:20px; padding:24px 0; border-bottom:1px solid #d8cfbe; }
.paper-item:last-child { border-bottom:0; }
.paper-no { color:var(--accent-deep); font:900 1rem/1 ui-monospace,monospace; padding-top:5px; }
.paper-item h4 { margin:0 0 7px; font-size:1.08rem; }
.paper-item p { margin:0 0 13px; color:#5d6a70; }
.paper-actions { display:flex; flex-wrap:wrap; gap:8px; }
.paper-actions a { border:1px solid #bdb29e; padding:7px 10px; font:800 .7rem/1.2 ui-monospace,monospace; color:#263a44; background:#fbf8f1; }
.paper-actions a:hover { border-color:var(--accent-deep); color:var(--accent-deep); }
@media(max-width:800px){.study-grid{grid-template-columns:1fr}.paper-series-head{grid-template-columns:1fr}.paper-series-head p{grid-column:auto}.paper-item{grid-template-columns:42px 1fr}.paper-series{padding:24px}}


/* v1.2.06 — Book 3 uses the established reusable book-profile system. */


/* v1.2.07 — Book 4 nonlinear handbook and companion-software integration. */
.secondary-book-button { background:transparent; color:var(--accent); border:1px solid var(--accent); }
.secondary-book-button:hover { background:var(--accent); color:#111a20; }

/* v1.2.15: compact project-oriented Engineering Software catalogue */
.resource-intro{color:#536878;margin:0 0 18px}
.resource-selector,.resource-project-selector{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 18px}
.resource-family,.resource-project{font:inherit;text-align:left;cursor:pointer;padding:13px 16px;border:1px solid #cfc9bc;background:#f8f6f0;color:#132634;transition:background .15s,border-color .15s}
.resource-family:hover,.resource-project:hover{border-color:#b28b37}
.resource-family[aria-pressed="true"],.resource-project[aria-pressed="true"]{background:#0b1a24;color:#fff;border-color:#0b1a24}
.resource-family-panel[hidden],.resource-project-panel[hidden]{display:none!important}
.resource-family-panel{padding:12px 0 0}
.resource-project-selector{border-bottom:1px solid #d8d2c7;padding-bottom:18px}
.resource-project-heading{font-size:1.25rem;margin:5px 0 18px;color:#102633}
@media(max-width:760px){.resource-family,.resource-project{width:100%}}

/* v1.2.17: stacked research-family accordion */
.resource-accordion{display:flex;flex-direction:column;gap:10px;margin:0 0 18px}
.resource-accordion-item{border:1px solid #d2cbbf;background:#f8f6f0}
.resource-accordion .resource-family{display:flex;align-items:center;justify-content:space-between;gap:14px;width:100%;border:0;padding:17px 19px;font-weight:650}
.resource-accordion .resource-family::after{content:"+";font-size:1.35rem;line-height:1;font-weight:400}
.resource-accordion .resource-family[aria-expanded="true"]::after{content:"−"}
.resource-accordion .resource-family[aria-expanded="true"]{background:#0b1a24;color:#fff}
.resource-accordion .resource-family-panel{padding:20px 19px 8px;background:#f8f6f0;border-top:1px solid #d2cbbf}
.resource-accordion .resource-project-selector{display:flex;flex-wrap:wrap;gap:9px}
@media(max-width:760px){.resource-accordion .resource-family-panel{padding:14px 12px 6px}}

/* v1.2.18: five-book resource drawers; same visual language as research drawers */
.book-resource-accordion .book-resource-family-panel{padding-bottom:18px}
.book-resource-accordion .book-resource-family-panel .resource-item{margin:18px 0 0}
.book-resource-accordion .book-resource-family-panel>.paper-actions{margin:10px 0 12px}

/* v3.0.00 anti-bot honeypot: visually and interactively hidden */
.contact-honeypot {position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important;}