:root {
  --bg: #f3f1ec;
  --panel: #ffffff;
  --panel-raised: #ede9e1;
  --viewer: #0e1215;
  --border: #e1dcd1;
  --border-light: #cdc7b9;
  --text: #1c2126;
  --text-dim: #5f6a73;
  --text-faint: #857f72;
  --accent: #1892a6;
  --accent-bright: #5ecbdb;
  --accent-dim: rgba(24, 146, 166, 0.1);
  --amber: #b9791c;
  --amber-dim: rgba(185, 121, 28, 0.1);
  --alert: #b23b2e;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  overflow: hidden;
}

::selection { background: var(--accent-dim); color: var(--text); }

a { color: var(--accent); }

/* Scrollbars */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }

/* ============ SIDEBAR ============ */
#sidebar {
  width: 320px;
  min-width: 320px;
  height: 100vh;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.brand {
  padding: 22px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.brand-mark {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-mark .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-bright);
  box-shadow: 0 0 8px var(--accent-bright);
  display: inline-block;
  margin-right: 2px;
}

.brand h1 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--text);
}

.brand p {
  font-size: 11.5px;
  color: var(--text-dim);
  margin: 6px 0 0;
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.search-wrap {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.search-box {
  position: relative;
}

.search-box input {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 9px 10px 9px 30px;
  outline: none;
  transition: border-color 0.15s;
}

.search-box input:focus { border-color: var(--accent); }
.search-box input::placeholder { color: var(--text-faint); }

.search-box::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  width: 10px;
  height: 10px;
  border: 1.5px solid var(--text-faint);
  border-radius: 50%;
  transform: translateY(-60%);
}
.search-box::after {
  content: "";
  position: absolute;
  left: 18px;
  top: 60%;
  width: 5px;
  height: 1.5px;
  background: var(--text-faint);
  transform: rotate(45deg);
}

#nav {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0 20px;
}

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 10px 20px;
}

.contact-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  padding: 6px 0;
  transition: color 0.15s;
}
.contact-link:hover { color: var(--accent); }

.joint-group { border-bottom: 1px solid var(--border); }
.joint-group:last-child { border-bottom: none; }

.joint-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 20px;
  cursor: pointer;
  user-select: none;
}
.joint-head:hover { background: var(--panel-raised); }

.joint-head .name {
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 600;
}
.joint-head .meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-faint);
  display: block;
  margin-top: 2px;
  font-weight: 400;
}
.joint-head .chevron {
  color: var(--text-faint);
  font-size: 11px;
  transition: transform 0.15s;
}
.joint-group.open .chevron { transform: rotate(90deg); color: var(--accent); }

.joint-body {
  display: none;
  padding-bottom: 8px;
}
.joint-group.open .joint-body { display: block; }

.category-block { margin: 4px 0 10px; }

.coming-soon {
  font-style: italic;
  color: var(--text-faint);
  font-size: 13px;
  padding: 6px 20px 14px 34px;
}

.category-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 6px 20px 6px 34px;
}

.entry-link {
  display: block;
  padding: 7px 20px 7px 34px;
  font-size: 13.5px;
  color: var(--text-dim);
  cursor: pointer;
  border-left: 2px solid transparent;
  line-height: 1.35;
}
.entry-link:hover { color: var(--text); background: var(--panel-raised); }
.entry-link.active {
  color: var(--text);
  border-left-color: var(--accent);
  background: var(--accent-dim);
}
.entry-link .aka {
  display: block;
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 1px;
}

/* ============ MAIN ============ */
#main {
  flex: 1;
  height: 100vh;
  overflow-y: auto;
  position: relative;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 40px;
  background: rgba(243, 241, 236, 0.88);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  letter-spacing: 0.03em;
}
.topbar .sep { color: var(--border-light); }
.topbar .current { color: var(--accent); }

.content { padding: 36px 40px 100px; max-width: 880px; }

#site-footer {
  padding: 20px 40px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
}

.text-block { display: flex; flex-direction: column; gap: 14px; max-width: 640px; }
.text-block p { margin: 0; font-size: 14.5px; line-height: 1.75; color: var(--text); }
.text-block a { color: var(--accent); }

/* Welcome state */
.welcome { padding: 60px 40px 40px; max-width: 780px; }
.welcome .kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.welcome h2 {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 18px;
  max-width: 560px;
}
.welcome p.lead {
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 34px;
}
.stat-row { display: flex; gap: 34px; margin-bottom: 44px; flex-wrap: wrap; }
.stat {
  font-family: var(--font-mono);
}
.stat .num { font-size: 26px; color: var(--accent); font-weight: 600; }
.stat .lbl { font-size: 11px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.05em; }
.welcome-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.welcome-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  background: var(--panel);
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
  min-height: 114px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.welcome-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.welcome-card .jname { font-family: var(--font-display); font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.welcome-card .jblurb { font-size: 12.5px; color: var(--text-dim); line-height: 1.5; }

/* Entry header */
.entry-header { margin-bottom: 22px; }
.entry-name { font-family: var(--font-display); font-size: 30px; font-weight: 600; margin: 0 0 4px; line-height: 1.15; }
.entry-aka { font-family: var(--font-mono); font-size: 13px; color: var(--amber); }

/* Diagram / viewer panel */
.viewer-panel {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 20px 0 28px;
  position: relative;
}
.viewer-panel svg, .viewer-panel img { display: block; width: 100%; height: auto; }
.viewer-panel img { cursor: zoom-in; transition: opacity 0.15s; }
.viewer-panel img:hover { opacity: 0.88; }

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 14, 0.92);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 40px;
  overflow: auto;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  cursor: zoom-in;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  margin: auto;
}
.lightbox img.zoomed {
  max-width: none;
  max-height: none;
  width: auto;
  cursor: zoom-out;
}
.lightbox-close {
  position: fixed;
  top: 20px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  z-index: 101;
  transition: background 0.15s;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.2); }
.viewer-caption {
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
}

.diagram-pending {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 28px 24px;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* Report sections */
.section { padding: 20px 0; border-top: 1px solid var(--border); }
.section:first-of-type { border-top: 1px solid var(--border); }
.section-label {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section.significance .section-label { color: var(--amber); }
.section.pitfalls .section-label { color: var(--alert); }
.section p { margin: 0; font-size: 14.5px; line-height: 1.75; color: var(--text); }
.section.values p { font-family: var(--font-mono); font-size: 13.5px; color: var(--text); background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 12px 14px; line-height: 1.9;}

/* Default bullet list — sits directly on the page, no box, matches body text */
.section ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.section ul li {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
  padding: 0 0 10px 18px;
  position: relative;
}
.section ul li:last-child { padding-bottom: 0; }
.section ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

/* Values — the one section that keeps the boxed "data readout" treatment */
.section.values ul {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 0;
  overflow: hidden;
}
.section.values ul li {
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  padding: 10px 16px 10px 30px;
  border-bottom: 1px solid var(--border);
}
.section.values ul li:last-child { border-bottom: none; padding-bottom: 10px; }
.section.values ul li::before { left: 16px; top: 15px; }

.value-label {
  font-weight: 600;
  color: var(--accent);
}

/* References — subdued italic citations, no box */
.section.references p { font-size: 12.5px; color: var(--text-dim); font-style: italic; }
.section.references ul li {
  font-size: 12.5px;
  color: var(--text-dim);
  font-style: italic;
  line-height: 1.6;
  padding-bottom: 6px;
}
.section.references ul li::before { width: 4px; height: 4px; background: var(--text-faint); top: 7px; }

.entry-footer {
  margin-top: 30px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
}

.contact-btn {
  display: inline-block;
  margin-top: 4px;
  padding: 11px 20px;
  background: var(--accent);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
  align-self: flex-start;
}
.contact-btn:hover { background: var(--accent-bright); }

.contact-form {
  max-width: 480px;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text);
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.15s;
}
.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form textarea:focus { border-color: var(--accent); }

.contact-form textarea {
  resize: vertical;
  min-height: 180px;
  line-height: 1.6;
}

.contact-form fieldset {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px 14px;
  margin: 0;
}

.contact-form legend {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 0 4px;
}

.contact-form .checkbox-row {
  flex-direction: row;
  align-items: center;
  gap: 9px;
  font-family: var(--font-body);
  font-size: 13.5px;
  text-transform: none;
  letter-spacing: normal;
  color: var(--text);
  padding: 5px 0;
}

.contact-form .checkbox-row input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
}

.contact-form button[disabled] { opacity: 0.6; cursor: default; }

.contact-status {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
}
.contact-status.error { color: var(--alert); }

.contact-success {
  max-width: 480px;
  margin-top: 24px;
  padding: 16px 18px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}
.contact-success p { margin: 0; }

/* Search results */
.results-list { display: flex; flex-direction: column; gap: 2px; }
.result-item {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 8px;
}
.result-item:hover { border-color: var(--accent); background: var(--panel); }
.result-item .rname { font-family: var(--font-display); font-size: 15.5px; font-weight: 600; }
.result-item .rpath { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); margin-top: 3px; }
.result-item .rdef { font-size: 13px; color: var(--text-dim); margin-top: 6px; line-height: 1.5; }
.no-results { color: var(--text-faint); font-family: var(--font-mono); font-size: 13px; padding: 30px 0; }

.search-hidden { display: none !important; }

@media (max-width: 900px) {
  #sidebar { width: 100%; position: fixed; z-index: 20; transform: translateX(-100%); transition: transform 0.2s; }
  #sidebar.mobile-open { transform: translateX(0); }
  .content, .welcome { padding-left: 20px; padding-right: 20px; }
  .welcome-grid { grid-template-columns: 1fr; }
  #menu-toggle { display: flex !important; }
}

#menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  margin-right: 4px;
}