:root {
  color-scheme: light;
  --paper: #fffefb;
  --paper-warm: #f6f2eb;
  --ink: #24211d;
  --muted: #655f57;
  --line: rgba(55, 47, 38, .16);
  --accent: #176b5b;
  --accent-dark: #0d5144;
  --accent-soft: #e5f2ed;
  --focus: #006fc9;
  --header-bg: rgba(255,254,251,.97);
  --card-bg: #fff;
  --image-bg: #e9e4db;
  --button-bg: #0d5144;
  --button-ink: #fff;
  --skip-bg: #fff;
  --max: 1120px;
  --reading: 760px;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-rounded, "Avenir Next", Avenir, "Segoe UI", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}
a { color: var(--accent-dark); text-underline-offset: .18em; }
a:hover { color: var(--accent); }
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 4px;
}
.skip-link { position: absolute; left: -999px; top: 8px; z-index: 10; }
.skip-link:focus { left: 12px; background: var(--skip-bg); padding: 10px 14px; }
.site-header { border-bottom: 1px solid var(--line); background: var(--header-bg); }
.nav-wrap { max-width: var(--max); margin: 0 auto; padding: 14px 22px; display: flex; gap: 24px; align-items: center; justify-content: space-between; }
.brand { color: var(--ink); font-weight: 800; text-decoration: none; letter-spacing: -.02em; white-space: nowrap; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 18px; align-items: center; }
.site-nav a { color: var(--ink); font-size: .92rem; font-weight: 650; text-decoration: none; padding: 8px 0; }
.site-nav a[aria-current="page"] { color: var(--accent-dark); text-decoration: underline; text-decoration-thickness: 2px; }
main { min-height: 65vh; }
.hero, .page-head { max-width: var(--max); margin: 0 auto; padding: clamp(64px, 9vw, 116px) 22px 64px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(250px, .55fr); gap: 48px; align-items: end; }
.eyebrow { color: var(--accent-dark); font-size: .78rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.12; text-wrap: balance; }
h1 { max-width: 850px; margin: 10px 0 22px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.7rem, 7vw, 5.8rem); font-weight: 600; letter-spacing: -.045em; }
.page-head h1 { font-size: clamp(2.55rem, 6vw, 4.8rem); }
h2 { margin: 0 0 16px; font-size: clamp(1.8rem, 4vw, 3rem); letter-spacing: -.025em; }
h3 { margin: 0 0 8px; font-size: 1.25rem; }
.lede { max-width: 720px; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.28rem); }
.meta { color: var(--muted); font-size: .91rem; }
.section { padding: 72px 22px; }
.section.alt { background: var(--paper-warm); }
.section-inner { max-width: var(--max); margin: 0 auto; }
.section-intro { max-width: 720px; margin-bottom: 34px; color: var(--muted); }
.topic-list { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.topic { grid-column: span 6; min-height: 220px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); display: flex; flex-direction: column; justify-content: space-between; }
.topic.wide { grid-column: span 8; }
.topic.narrow { grid-column: span 4; }
.topic.full { grid-column: span 12; min-height: 180px; }
.topic p { color: var(--muted); }
.topic a.stretched { font-weight: 750; }
.tag { display: inline-block; align-self: start; margin-bottom: 38px; padding: 3px 9px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-dark); font-size: .75rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.reading { max-width: var(--reading); margin: 0 auto; padding: 0 22px 80px; }
.reading section { padding: 28px 0; border-top: 1px solid var(--line); }
.reading h2 { font-size: clamp(1.55rem, 3vw, 2.1rem); }
.reading ul { padding-left: 1.3em; }
.notice { margin: 24px 0; padding: 20px 22px; background: var(--accent-soft); border-radius: 10px; }
.network-diagram { margin: 34px 0 0; }
.network-diagram img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); }
.network-diagram figcaption { margin-top: 10px; color: var(--muted); font-size: .9rem; }
.network-flow { display: none; }
.network-step { position: relative; padding: 22px 22px 22px 70px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); }
.network-step > span { position: absolute; left: 20px; top: 22px; color: var(--accent-dark); font-size: .78rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.network-step p { margin-bottom: 0; color: var(--muted); }
.network-step.gate { border: 2px solid var(--accent); background: var(--accent-soft); }
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.project-grid-two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.project-card { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--card-bg); }
.app-screen-card { margin: 0; }
.app-screen { display: block; width: 100%; height: auto; background: var(--image-bg); }
.automation-gallery .app-screen { height: clamp(420px, 55vw, 620px); object-fit: contain; }
.app-screen-grid-two { max-width: 780px; margin: 0 auto; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.project-photo { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; background: var(--image-bg); }
.project-image { min-height: 190px; display: grid; place-items: center; padding: 24px; background: var(--image-bg); color: var(--muted); text-align: center; font-weight: 700; }
.project-copy { padding: 22px; }
.trip-list { display: grid; gap: 28px; }
.trip-card { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); box-shadow: var(--shadow); }
.trip-card-image { display: block; min-height: 310px; }
.trip-card-image img { width: 100%; height: 100%; min-height: 310px; object-fit: cover; display: block; }
.trip-card-copy { padding: clamp(26px, 5vw, 54px); align-self: center; }
.trip-card-copy h3 { margin: 10px 0 14px; font-family: Georgia, 'Times New Roman', serif; font-size: clamp(1.5rem, 3vw, 2.2rem); line-height: 1.15; }
.trip-card-copy h3 a { color: var(--ink); text-decoration: none; }
.trip-card-copy h3 a:hover { color: var(--accent-dark); }
.trip-hero { max-width: var(--max); margin: 0 auto; padding: 0 22px 58px; }
.trip-hero img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; display: block; border-radius: var(--radius); box-shadow: var(--shadow); }
.eclipse-hero img { aspect-ratio: auto; object-fit: contain; }
.event-hero { text-align: center; }
.event-hero img { width: min(100%, 720px); margin-inline: auto; aspect-ratio: auto; object-fit: contain; background: var(--image-bg); }
.event-hero figcaption { max-width: 720px; margin-inline: auto; text-align: left; }
.event-gallery { align-items: start; }
.trip-gallery.event-gallery img { height: auto; aspect-ratio: auto; object-fit: contain; }
.trip-hero figcaption, .trip-gallery figcaption { color: var(--muted); font-size: .9rem; line-height: 1.4; }
.trip-hero figcaption { margin-top: 9px; }
.trip-story p { font-size: 1.08rem; line-height: 1.82; }
.trip-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 24px; }
.trip-gallery figure { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); box-shadow: var(--shadow); }
.trip-gallery img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; display: block; background: var(--image-bg); }
.trip-gallery figcaption { padding: 12px 14px 14px; }
.printer-hero { text-align: center; }
.printer-hero img { width: min(100%, 620px); margin-inline: auto; aspect-ratio: auto; object-fit: contain; background: var(--image-bg); }
.printer-hero figcaption { max-width: 620px; margin-inline: auto; text-align: left; }
.printer-timeline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin: 28px 0 8px; }
.printer-timeline article { min-width: 0; padding: 20px; border-top: 3px solid var(--accent); background: var(--paper-warm); }
.printer-timeline span { color: var(--accent-dark); font-size: .8rem; font-weight: 800; letter-spacing: .08em; }
.printer-timeline h3 { margin: 7px 0 8px; font-size: 1.15rem; }
.printer-timeline p { margin: 0; color: var(--muted); font-size: .92rem; line-height: 1.55; }
.printer-gallery { align-items: start; }
.printer-gallery img { height: auto; aspect-ratio: auto; object-fit: contain; }
.printer-feature { margin: 28px 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); box-shadow: var(--shadow); }
.printer-feature img { display: block; width: 100%; height: auto; background: var(--image-bg); }
.printer-feature figcaption { padding: 12px 14px 14px; color: var(--muted); font-size: .9rem; line-height: 1.4; }
.result-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 28px; }
.result-gallery figure { min-width: 0; margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); box-shadow: var(--shadow); }
.result-gallery img { display: block; width: 100%; height: auto; background: var(--image-bg); }
.result-gallery figcaption { padding: 12px 14px 14px; color: var(--muted); font-size: .9rem; line-height: 1.4; }
.trip-back { margin: 32px 0 0; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button { display: inline-block; min-height: 44px; padding: 9px 15px; border: 1px solid var(--button-bg); border-radius: 6px; color: var(--button-ink); background: var(--button-bg); font-weight: 750; text-decoration: none; }
.button.secondary { color: var(--accent-dark); background: transparent; }
.empty { padding: 28px; border: 1px dashed var(--line); border-radius: var(--radius); color: var(--muted); }
.ai-project-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.ai-project-card { min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); display: flex; flex-direction: column; }
.ai-project-mark { min-height: 150px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent-dark); font-family: Georgia, "Times New Roman", serif; font-size: clamp(3rem, 7vw, 5rem); font-weight: 700; letter-spacing: -.06em; }
.ai-project-copy { padding: 26px; }
.ai-project-copy .tag { margin-bottom: 22px; }
.ai-project-copy p, .ai-facts { color: var(--muted); }
.ai-facts { margin: 20px 0 0; padding-left: 1.15em; font-size: .94rem; }
.ai-facts li + li { margin-top: 10px; }
.ai-facts strong { color: var(--ink); }
.principle-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.principle-grid article { padding: 24px; border-top: 3px solid var(--accent); background: var(--paper-warm); }
.principle-grid article > span { display: block; margin-bottom: 28px; color: var(--accent-dark); font-size: .78rem; font-weight: 800; letter-spacing: .1em; }
.principle-grid p { margin-bottom: 0; color: var(--muted); }
.stats-callout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: clamp(28px, 6vw, 72px); align-items: center; }
.stats-callout .notice { margin: 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.stat-card { min-width: 0; padding: 28px 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card-bg); }
.stat-card strong { display: block; color: var(--accent-dark); font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1; letter-spacing: -.04em; }
.stat-card span { display: block; margin-top: 14px; color: var(--ink); font-weight: 800; }
.stat-card p { margin: 10px 0 0; color: var(--muted); font-size: .9rem; }
.stats-period { margin: 28px 0; color: var(--muted); }
.contact { font-style: normal; }
.site-footer { border-top: 1px solid var(--line); background: var(--paper-warm); }
.footer-wrap { max-width: var(--max); margin: 0 auto; padding: 32px 22px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 30px; }
.footer-wrap nav { display: flex; flex-wrap: wrap; gap: 12px 20px; }
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #171917;
    --paper-warm: #20231f;
    --ink: #f3efe8;
    --muted: #bdb6ac;
    --line: rgba(243,239,232,.18);
    --accent: #65c5aa;
    --accent-dark: #91dbc8;
    --accent-soft: #18372f;
    --focus: #72b8ff;
    --header-bg: rgba(23,25,23,.97);
    --card-bg: #20231f;
    --image-bg: #2b2e2a;
    --button-bg: #71cdb4;
    --button-ink: #10231d;
    --skip-bg: #20231f;
  }
}
@media (max-width: 850px) {
  .nav-wrap { align-items: flex-start; flex-direction: column; gap: 4px; }
  .hero { grid-template-columns: 1fr; gap: 18px; }
  .topic, .topic.wide, .topic.narrow { grid-column: span 12; min-height: auto; }
  .project-grid { grid-template-columns: 1fr; }
  .app-screen-grid-two { grid-template-columns: 1fr; }
  .ai-project-grid { grid-template-columns: 1fr; }
  .principle-grid, .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats-callout { grid-template-columns: 1fr; }
  .trip-card { grid-template-columns: 1fr; }
  .trip-card-image, .trip-card-image img { min-height: 240px; }
  .trip-gallery { grid-template-columns: 1fr; }
  .printer-timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .result-gallery { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .network-diagram { display: none; }
  .network-flow { display: grid; gap: 14px; margin-top: 30px; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .site-nav { gap: 0 14px; }
  .hero, .page-head { padding-top: 48px; }
  .section { padding-block: 52px; }
  .principle-grid, .stats-grid, .printer-timeline { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }


/* ROOTKEEPER-ROLE-IDENTITY-V1 */
.brand { display: grid; gap: 0; line-height: 1.05; }
.brand span { font-size: 1rem; }
.brand small { margin-top: 5px; color: var(--accent-dark); font-size: .64rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.identity-hero { align-items: center; grid-template-columns: minmax(0, 1.28fr) minmax(300px, .72fr); }
.identity-hero h1 { font-size: clamp(2.7rem, 6.5vw, 5.4rem); }
.agent-card { padding: clamp(24px, 4vw, 34px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-warm); box-shadow: 0 18px 45px rgba(39, 34, 27, .08); }
.agent-card-head { display: flex; gap: 16px; align-items: center; }
.agent-card-head > div { display: grid; gap: 2px; }
.agent-card-head strong { font-size: 1.18rem; }
.agent-card-head span:not(.rk-monogram) { color: var(--muted); font-size: .86rem; }
.rk-monogram, .rk-seal { display: grid; place-items: center; flex: 0 0 auto; background: var(--accent-dark); color: var(--button-ink); font-family: Georgia, "Times New Roman", serif; font-weight: 700; letter-spacing: -.05em; }
.rk-monogram { width: 66px; height: 66px; border-radius: 50%; font-size: 1.65rem; }
.rk-seal { width: 48px; height: 48px; border-radius: 50%; font-size: 1.08rem; }
.agent-card > p { margin: 26px 0; color: var(--muted); }
.agent-card dl { margin: 0; border-top: 1px solid var(--line); }
.agent-card dl div { display: grid; grid-template-columns: 92px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.agent-card dt { color: var(--muted); font-size: .8rem; font-weight: 800; text-transform: uppercase; }
.agent-card dd { margin: 0; font-weight: 700; }
.collaboration-section { border-top: 1px solid var(--line); }
.section-kicker { margin-bottom: 10px; color: var(--accent-dark); font-size: .78rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.role-layout { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: 18px; margin-top: 34px; }
.role-card { display: grid; grid-template-columns: auto 1fr; gap: 22px; min-height: 260px; padding: clamp(26px, 4vw, 42px); border: 1px solid var(--line); background: var(--card-bg); }
.role-card.operator-role { border-radius: var(--radius) 4px 4px var(--radius); }
.role-card.engineer-role { border-radius: 4px var(--radius) var(--radius) 4px; background: var(--accent-soft); }
.role-index { color: var(--accent-dark); font-size: .76rem; font-weight: 800; letter-spacing: .1em; }
.role-card h3 { margin: 8px 0 18px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.9rem, 4vw, 3rem); }
.role-card p { margin: 0; color: var(--muted); }
.identity-page-head { padding-bottom: 54px; }
.profile-layout { display: grid; gap: 22px; }
.profile { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: clamp(24px, 5vw, 58px); padding: clamp(30px, 6vw, 64px); border: 1px solid var(--line); background: var(--card-bg); }
.profile.operator-profile { margin-right: 10%; border-radius: var(--radius) var(--radius) 4px var(--radius); }
.profile.agent-profile { margin-left: 10%; border-radius: 4px var(--radius) var(--radius) var(--radius); background: var(--accent-soft); }
.profile-mark { display: grid; place-items: center; width: 94px; height: 94px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); font-family: Georgia, "Times New Roman", serif; font-size: 2rem; font-weight: 700; }
.profile-mark.rk { border-color: var(--accent-dark); background: var(--accent-dark); color: var(--button-ink); }
.profile h2 { margin-top: 8px; }
.plain-list { margin: 22px 0 0; padding-left: 1.2em; color: var(--muted); }
.plain-list li + li { margin-top: 8px; }
.workflow-section { display: grid; grid-template-columns: minmax(240px, .72fr) minmax(0, 1.28fr); gap: clamp(34px, 7vw, 88px); }
.workflow-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.workflow-steps article { padding: 26px; background: var(--paper); }
.workflow-steps span { color: var(--accent-dark); font-size: .76rem; font-weight: 800; letter-spacing: .1em; }
.workflow-steps h3 { margin-top: 24px; }
.workflow-steps p { margin-bottom: 0; color: var(--muted); }
.boundary-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(30px, 7vw, 90px); }
.contact-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(300px, 1.15fr); gap: 18px; }
.contact-primary, .contact-agent { padding: clamp(28px, 5vw, 52px); border: 1px solid var(--line); background: var(--card-bg); }
.contact-primary { border-radius: var(--radius) 4px 4px var(--radius); }
.contact-agent { display: grid; grid-template-columns: auto 1fr; gap: 24px; border-radius: 4px var(--radius) var(--radius) 4px; background: var(--accent-soft); }
.contact-mail { font-size: clamp(1.15rem, 3vw, 1.7rem); font-weight: 750; }
.responsibility-note, .provenance-inner { display: flex; gap: 20px; align-items: flex-start; }
.responsibility-note { margin-top: 32px; padding: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.responsibility-note p { margin: 4px 0 0; color: var(--muted); }
.provenance { padding: 0 22px 72px; }
.provenance-inner { max-width: var(--reading); margin: 0 auto; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--accent-soft); }
.provenance-label { margin: 0 0 4px; color: var(--accent-dark); font-size: .76rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.provenance p:last-child { margin: 0; color: var(--muted); font-size: .94rem; }
.footer-identity { display: grid; gap: 3px; }
.footer-identity span { color: var(--muted); font-size: .9rem; }
.footer-identity a { font-weight: 750; }
@media (prefers-color-scheme: dark) { .agent-card { box-shadow: none; } }
@media (max-width: 850px) { .identity-hero, .role-layout, .workflow-section, .contact-layout { grid-template-columns: 1fr; } .profile.operator-profile, .profile.agent-profile { margin-inline: 0; } .role-card.operator-role, .role-card.engineer-role, .contact-primary, .contact-agent { border-radius: var(--radius); } }
@media (max-width: 620px) { .profile { grid-template-columns: 1fr; } .profile-mark { width: 72px; height: 72px; font-size: 1.55rem; } .workflow-steps, .boundary-grid { grid-template-columns: 1fr; } .contact-agent { grid-template-columns: 1fr; } .provenance-inner, .responsibility-note { align-items: flex-start; } }