:root {
  color-scheme: dark;
  --paper: #0e1513;
  --ink: #e6ece5;
  --muted: #a8b8ab;
  --green: #97c5a4;
  --line: #354a3d;
  --surface: #161f1b;
  --surface-raised: #1c2822;
  --surface-input: #111b16;
  --surface-sidebar: #17251e;
  --surface-viewer: #101814;
  --surface-selected: #2b4436;
  --control-border: #5c7b66;
  --on-accent: #102319;
  --focus: #9cbbff;
  --error: #f2aa9d;
  --marker: #29593f;
  --marker-text: #f0f6ef;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Segoe UI", system-ui, sans-serif; }
a { color: var(--green); text-underline-offset: 4px; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: .45; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, .viewer:focus-visible, .chat-messages:focus-visible, summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
[hidden] { display: none !important; }
.page { width: min(1120px, calc(100% - 72px)); margin: 0 auto; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 104px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); font-size: 20px; font-weight: 650; text-decoration: none; letter-spacing: -.7px; }
.brand-mark { display: grid; place-items: center; position: relative; width: 38px; height: 38px; background: var(--green); border-radius: 10px; color: var(--on-accent); font-size: 23px; font-family: Georgia, serif; }
.brand-mark span { position: absolute; right: 5px; top: 1px; color: var(--on-accent); }
nav { display: flex; gap: 30px; font-size: 14px; }
nav a { color: var(--ink); text-decoration: none; }
nav a:hover { text-decoration: underline; }
.intro { padding: 68px 0 46px; }
.eyebrow { margin: 0 0 16px; color: var(--green); font-size: 11px; font-weight: 700; letter-spacing: 1.8px; text-transform: uppercase; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 9px; background: var(--green); border-radius: 50%; }
h1, h2 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
h1 { margin: 0; font-size: clamp(40px, 5.5vw, 68px); line-height: 1.12; letter-spacing: -2.3px; }
h1 em { color: var(--green); font-weight: 400; }
.intro-copy { max-width: 510px; margin: 22px 0 0; color: var(--muted); line-height: 1.7; font-size: 17px; }
.prototype-note { max-width: 650px; margin: 18px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.atlas { overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); scroll-margin-top: 20px; }
.chat-panel { margin-bottom: 34px; padding: 30px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); scroll-margin-top: 20px; }
.chat-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.chat-heading .eyebrow { margin-bottom: 8px; }
.primary-button, .secondary-button { min-height: 44px; padding: 10px 17px; border: 1px solid var(--control-border); border-radius: 8px; font-size: 12px; line-height: 1.5; }
.primary-button { background: var(--green); color: var(--on-accent); border-color: var(--green); font-weight: 600; }
.primary-button:hover:not(:disabled) { background: #b2d6ba; }
.secondary-button { background: transparent; color: var(--ink); }
.model-setup { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; margin-top: 24px; padding: 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface-raised); }
.model-setup h3 { margin: 0 0 7px; font-size: 14px; font-weight: 600; }
.model-setup p { max-width: 680px; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.model-setup p + p { margin-top: 7px; }
.model-actions { display: flex; flex-direction: column; gap: 10px; }
#model-progress { grid-column: 1 / -1; width: 100%; height: 10px; accent-color: var(--green); }
.model-status, .chat-status { margin: 14px 0; color: var(--muted); font-size: 12px; line-height: 1.7; overflow-wrap: anywhere; }
.model-status[data-state="error"] { color: var(--error); }
.chat-messages { display: flex; flex-direction: column; gap: 15px; min-height: 150px; max-height: 520px; margin-top: 20px; padding: 6px 7px 10px 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-color: var(--control-border) var(--surface-input); }
.chat-message { width: min(92%, 810px); padding: 18px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-raised); overflow-wrap: anywhere; }
.user-message { align-self: flex-end; background: var(--surface-selected); }
.message-author { margin: 0 0 8px; color: var(--green); font-size: 11px; font-weight: 650; }
.message-body { margin: 0; color: var(--ink); font-size: 14px; line-height: 1.8; white-space: pre-wrap; }
.message-kind { margin: 12px 0 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
.inline-citation { display: inline-block; margin-left: 3px; padding: 0 5px; border: 1px solid var(--control-border); border-radius: 5px; font-size: 11px; text-decoration: none; white-space: nowrap; }
.chat-evidence { margin-top: 15px; padding-top: 12px; border-top: 1px solid var(--line); }
.chat-evidence summary { width: fit-content; color: var(--green); font-size: 12px; cursor: pointer; }
.chat-evidence ol { margin: 14px 0 0; padding-left: 21px; }
.chat-evidence li + li { margin-top: 18px; }
.chat-evidence h4 { margin: 0 0 5px; color: var(--ink); font-size: 12px; font-weight: 600; }
.chat-evidence p { margin: 0 0 8px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.chat-evidence .explore-result { margin-top: 5px; }
.chat-form { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.chat-form label { display: block; margin-bottom: 10px; font-size: 13px; font-weight: 600; }
.chat-input-row { display: flex; align-items: stretch; gap: 12px; }
#chat-question { flex: 1; min-width: 0; min-height: 78px; max-height: 220px; padding: 12px 14px; resize: vertical; border: 1px solid var(--control-border); border-radius: 8px; background: var(--surface-input); color: var(--ink); font-size: 14px; line-height: 1.6; }
#chat-question::placeholder { color: var(--muted); opacity: 1; }
.chat-send-actions { display: flex; flex-direction: column; justify-content: center; gap: 8px; }
.chat-help { margin: 12px 0 0; color: var(--muted); font-size: 11px; line-height: 1.7; }
.atlas-header { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 25px 30px; border-bottom: 1px solid var(--line); }
.atlas-header .eyebrow { margin-bottom: 8px; }
h2 { margin: 0; font-size: 27px; letter-spacing: -.7px; }
.view-label { padding: 7px 12px; border: 1px solid var(--line); border-radius: 20px; color: var(--muted); font-size: 11px; white-space: nowrap; }
.viewer { height: 430px; overflow: auto; overscroll-behavior: contain; background: var(--surface-viewer); scrollbar-color: var(--control-border) var(--surface-input); }
.image-stage { display: flex; justify-content: center; align-items: center; min-width: 100%; min-height: 100%; width: 100%; }
.image-frame { position: relative; flex: 0 0 auto; width: 400px; }
#brain-image { display: block; width: 100%; height: auto; user-select: none; }
.viewer-controls { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px 30px; border-top: 1px solid var(--line); }
.zoom-group { display: flex; align-items: center; gap: 14px; }
.zoom-group button { width: 38px; height: 38px; border: 1px solid var(--control-border); border-radius: 8px; color: var(--ink); background: transparent; font-size: 22px; }
button:hover:not(:disabled) { background: var(--surface-raised); }
#zoom-range { width: 140px; accent-color: var(--green); cursor: pointer; }
#zoom-value { min-width: 46px; color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.reset-button { min-height: 38px; padding: 0 15px; border: 1px solid var(--control-border); border-radius: 8px; background: transparent; color: var(--ink); font-size: 12px; }
.viewer-help { margin: 0; padding: 0 30px 20px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.image-error { margin: 0; padding: 18px 30px; color: var(--error); font-size: 14px; }
.source-note { display: grid; grid-template-columns: 1fr 1.3fr; gap: 60px; padding: 46px 0; scroll-margin-top: 20px; }
.source-note .eyebrow { margin-bottom: 10px; }
.source-note h2 { font-size: 24px; }
.source-details { min-width: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.source-details > p { margin: 0; }
.source-details h3 { margin: 20px 0 8px; color: var(--ink); font-size: 14px; font-weight: 600; }
.source-details ul { margin: 0; padding-left: 20px; }
.source-details li + li { margin-top: 10px; }
.atlas-layout { display: grid; grid-template-columns: minmax(0, 1fr) 330px; }
.atlas-canvas { min-width: 0; }
.orientation { display: flex; justify-content: space-between; padding: 15px 30px 0; background: var(--surface-viewer); color: var(--muted); font-size: 11px; }
.marker-help { margin: 0; padding: 0 30px 24px; color: var(--muted); font-size: 11px; line-height: 1.6; }
.region-panel { min-width: 0; padding: 26px; border-left: 1px solid var(--line); background: var(--surface-sidebar); }
.region-panel > .eyebrow { margin-bottom: 12px; }
.corpus-status { margin: 0 0 14px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.region-selector { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.region-button { display: flex; align-items: center; gap: 7px; min-height: 46px; padding: 9px; border: 1px solid var(--control-border); border-radius: 8px; color: var(--ink); background: var(--surface); font-size: 12px; text-align: left; line-height: 1.4; }
.region-number { color: var(--muted); font-size: 10px; font-variant-numeric: tabular-nums; }
.region-button[aria-pressed="true"] { border-color: var(--green); background: var(--surface-selected); }
.region-button[aria-pressed="true"]:hover { background: var(--surface-selected); }
.region-markers { position: absolute; inset: 0; pointer-events: none; }
.region-marker { position: absolute; display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 50%; background: transparent; transform: translate(-50%, -50%); pointer-events: auto; }
.region-marker span { display: grid; place-items: center; width: 25px; height: 25px; border: 2px solid var(--marker-text); border-radius: 50%; background: var(--marker); color: var(--marker-text); font-size: 11px; font-weight: 700; box-shadow: 0 0 0 1px var(--marker); }
.region-marker:hover:not(:disabled) { background: #97c5a429; }
.region-marker[aria-pressed="true"] span { width: 31px; height: 31px; background: var(--green); color: var(--on-accent); box-shadow: 0 0 0 3px var(--marker); }
.region-detail { margin-top: 25px; padding-top: 23px; border-top: 1px solid var(--line); }
.region-detail > .eyebrow { margin-bottom: 7px; font-size: 10px; letter-spacing: 1.3px; }
.region-detail > h3 { margin: 0 0 20px; color: var(--ink); font-family: Georgia, "Times New Roman", serif; font-size: 28px; font-weight: 400; letter-spacing: -.6px; }
.anatomy-passage + .anatomy-passage { margin-top: 20px; }
.anatomy-passage h4 { margin: 0 0 7px; font-size: 12px; font-weight: 650; }
.anatomy-passage > p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.anatomy-passage .passage-source { margin-top: 8px; font-size: 10px; line-height: 1.6; }
.anatomy-note { margin: 20px 0 0; padding-top: 15px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.6; }
.retry-button { min-height: 44px; padding: 9px 12px; border: 1px solid var(--control-border); border-radius: 8px; background: var(--surface); color: var(--ink); font-size: 12px; }
.search-panel { margin-top: 34px; padding: 30px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); scroll-margin-top: 20px; }
.search-heading .eyebrow { margin-bottom: 8px; }
.search-heading > p:last-child { margin: 12px 0 24px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.search-form label { display: block; margin-bottom: 10px; font-size: 13px; font-weight: 600; }
.search-input-row { display: flex; align-items: stretch; gap: 10px; }
#search-query { flex: 1; min-width: 0; min-height: 48px; padding: 12px 14px; border: 1px solid var(--control-border); border-radius: 8px; background: var(--surface-input); color: var(--ink); font-size: 14px; }
#search-query::placeholder { color: var(--muted); opacity: 1; }
#search-submit { min-height: 48px; padding: 0 22px; border: 1px solid var(--green); border-radius: 8px; background: var(--green); color: var(--on-accent); font-size: 13px; font-weight: 600; }
#search-submit:hover:not(:disabled) { background: #b2d6ba; }
.search-help, .search-status { margin: 13px 0 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.search-status { color: var(--ink); }
#retry-search { margin-top: 14px; }
.search-results { display: grid; gap: 14px; margin: 22px 0 0; padding: 0; list-style: none; }
.search-result { padding: 21px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface-raised); }
.search-result h3 { margin: 0 0 10px; font-family: Georgia, "Times New Roman", serif; font-size: 21px; font-weight: 400; }
.search-result-text { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.search-match { margin: 10px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; }
.search-result-sources { margin: 10px 0 15px; color: var(--muted); font-size: 11px; line-height: 1.7; }
.explore-result { min-height: 44px; padding: 9px 14px; border: 1px solid var(--control-border); border-radius: 8px; background: transparent; color: var(--ink); font-size: 12px; }
.thesis-panel { margin-top: 34px; padding: 30px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); scroll-margin-top: 20px; }
.thesis-status, .thesis-help { margin: 13px 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.thesis-choices { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 18px; }
.thesis-choice[aria-pressed="true"] { background: var(--surface-selected); border-color: var(--green); color: var(--ink); }
.thesis-choice[aria-pressed="true"]:hover:not(:disabled) { background: var(--surface-selected); }
.thesis-model-summary h3 { margin: 22px 0 10px; font-family: Georgia, "Times New Roman", serif; font-size: 24px; font-weight: 400; }
.thesis-model-summary > p { margin: 10px 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.thesis-facts { display: flex; flex-wrap: wrap; gap: 18px 42px; margin: 23px 0; }
.thesis-facts dt { color: var(--muted); font-size: 11px; }
.thesis-facts dd { margin: 7px 0 0; color: var(--ink); font-size: 14px; font-variant-numeric: tabular-nums; }
.thesis-model-summary > .thesis-verification { color: var(--green); font-size: 12px; }
.thesis-figure { margin: 18px 0 0; }
.thesis-viewer { height: 450px; border: 1px solid var(--line); border-radius: 10px; }
#thesis-image { display: block; width: 100%; height: auto; user-select: none; }
.thesis-viewer-controls { padding: 18px 0 0; border-top: 0; }
#thesis-zoom-range { width: 140px; accent-color: var(--green); cursor: pointer; }
#thesis-zoom-value { min-width: 46px; color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.thesis-error { margin: 16px 0; color: var(--error); font-size: 13px; line-height: 1.7; }
#thesis-caption { margin: 15px 0 0; color: var(--ink); font-size: 13px; line-height: 1.8; }
.thesis-notes { margin-top: 23px; padding-top: 18px; border-top: 1px solid var(--line); }
.thesis-notes summary { width: fit-content; color: var(--green); font-size: 12px; cursor: pointer; }
.thesis-notes p { color: var(--muted); font-size: 12px; line-height: 1.8; overflow-wrap: anywhere; }
footer { display: flex; justify-content: space-between; gap: 18px; padding: 23px 0 30px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.6; }
.skip-link { position: absolute; left: 18px; top: -100px; padding: 12px; background: var(--green); color: var(--on-accent); z-index: 10; }
.skip-link:focus { top: 14px; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 880px) {
  .site-header { flex-wrap: wrap; padding: 20px 0; gap: 18px; }
  nav { width: 100%; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
  .atlas-layout { grid-template-columns: 1fr; }
  .region-panel { border-left: 0; border-top: 1px solid var(--line); }
  .region-selector { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .page { width: calc(100% - 36px); }
  .site-header { min-height: 80px; gap: 16px; flex-wrap: wrap; padding: 20px 0; }
  .brand { font-size: 18px; }
  nav { width: 100%; justify-content: space-between; flex-wrap: wrap; gap: 16px; font-size: 12px; }
  .intro { padding: 42px 0 30px; }
  h1 { font-size: 41px; letter-spacing: -1.5px; }
  .intro-copy { font-size: 15px; }
  .atlas-header { padding: 20px; }
  .view-label { display: none; }
  .viewer { height: 330px; }
  .viewer-controls { flex-wrap: wrap; padding: 16px 20px; }
  .zoom-group { gap: 10px; width: 100%; min-width: 0; }
  .zoom-group button { flex: 0 0 38px; }
  #zoom-range { width: 95px; min-width: 30px; flex: 1; }
  .viewer-help, .image-error { padding-left: 20px; padding-right: 20px; }
  .orientation { padding-left: 20px; padding-right: 20px; }
  .marker-help { padding-left: 20px; padding-right: 20px; }
  .region-panel { padding: 22px 20px; }
  .region-selector { grid-template-columns: 1fr 1fr; }
  .search-panel { padding: 24px 20px; }
  .thesis-panel { padding: 24px 20px; }
  .thesis-viewer { height: 310px; }
  .thesis-viewer-controls { padding: 16px 0 0; }
  #thesis-zoom-range { width: 95px; min-width: 30px; flex: 1; }
  .search-input-row { flex-direction: column; }
  .search-result { padding: 17px; }
  .chat-panel { padding: 24px 20px; }
  .chat-heading { align-items: flex-start; flex-wrap: wrap; }
  .model-setup { grid-template-columns: 1fr; padding: 16px; }
  .model-actions { flex-direction: row; flex-wrap: wrap; }
  .chat-message { width: 100%; padding: 16px; }
  .chat-input-row { flex-direction: column; }
  .chat-send-actions { flex-direction: row; justify-content: flex-start; }
  .source-note { grid-template-columns: 1fr; gap: 20px; padding: 34px 0; }
  footer { flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }