.breadcrumb { display:flex; align-items:center; gap:10px; padding-top:27px; color:var(--soft); font-size:12px; }
.breadcrumb a { color:var(--muted); text-decoration:none; }
.breadcrumb a:hover { color:var(--text); }
.explainer-hero { max-width:850px; padding:72px 0 76px; }
.explainer-hero h1 { margin:0; font-size:clamp(45px,5.2vw,68px); line-height:1.08; letter-spacing:-.055em; }
.explainer-hero > p:last-child { max-width:730px; margin:23px 0 0; color:#bdcfc0; font-size:18px; }
.diagram-section { padding:35px; border:1px solid #315641; border-radius:26px; background:radial-gradient(circle at 100% 0,rgba(92,190,116,.10),transparent 32rem),#0d1b14; }
.diagram-heading { display:flex; align-items:flex-end; justify-content:space-between; gap:25px; }
.diagram-heading h2 { max-width:700px; margin:0; font-size:clamp(28px,3.5vw,42px); line-height:1.16; letter-spacing:-.04em; }
.step-counter { flex:none; color:var(--accent); font-size:14px; font-weight:700; }
.mode-switch { display:inline-flex; flex-wrap:wrap; gap:4px; margin:31px 0 18px; padding:4px; border:1px solid var(--border); border-radius:11px; background:#09150e; }
.mode-switch button { padding:10px 15px; border:0; border-radius:8px; background:none; color:var(--muted); cursor:pointer; font-size:13px; font-weight:700; }
.mode-switch button.is-active { background:#214b31; color:var(--text); }
.diagram-panel { padding:24px; border:1px solid var(--border); border-radius:18px; background:#08140e; }
.flow-track { display:grid; grid-template-columns:repeat(6,minmax(0,1fr)); gap:7px; }
.flow-track[data-mode="online"] { grid-template-columns:repeat(5,minmax(0,1fr)); }
.flow-node { min-width:0; min-height:98px; padding:13px 10px; border:1px solid #2b4937; border-radius:11px; background:#102019; color:var(--muted); text-align:left; cursor:pointer; }
.flow-node:hover,.flow-node.is-current { border-color:var(--accent); color:var(--text); background:#173222; }
.flow-node.is-past { border-color:#467a55; }
.flow-node-number { display:block; margin-bottom:10px; color:var(--accent); font-size:11px; font-weight:700; }
.flow-node strong { display:block; overflow-wrap:anywhere; font-size:12px; line-height:1.25; }
.flow-detail { display:grid; grid-template-columns:54px 1fr; gap:18px; margin-top:21px; padding:23px; border:1px solid #2b4e38; border-radius:13px; background:#102318; }
.detail-icon { display:grid; place-items:center; width:48px; height:48px; border-radius:12px; background:var(--accent); color:#092013; font-size:15px; font-weight:700; }
.detail-kicker { margin:0 0 5px; color:var(--accent); font-size:11px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; }
.flow-detail h3 { margin:0 0 9px; font-size:22px; letter-spacing:-.025em; }
.flow-detail p:not(.detail-kicker) { max-width:760px; margin:0; color:var(--muted); font-size:14px; }
.visibility { display:flex; flex-wrap:wrap; gap:5px 13px; margin-top:17px; padding-top:13px; border-top:1px solid var(--border); font-size:12px; }
.visibility span { color:var(--soft); }
.visibility strong { color:#d1e7d4; font-weight:600; }
.flow-controls { display:flex; justify-content:space-between; gap:12px; margin-top:18px; }
.flow-controls button { padding:9px 15px; border:1px solid var(--border); border-radius:9px; background:#13261a; color:var(--text); cursor:pointer; font-size:13px; font-weight:700; }
.flow-controls button:hover:not(:disabled) { border-color:var(--accent); }
.flow-controls button:disabled { opacity:.4; cursor:default; }
.diagram-footnote { margin:16px 4px 0; color:var(--soft); font-size:12px; }
.payload-diagram { display:grid; grid-template-columns:1fr 110px 1fr; align-items:stretch; gap:12px; }
.payload-side { min-height:180px; padding:24px; border:1px solid var(--border); border-radius:17px; background:var(--surface); }
.payload-side span,.payload-side strong { display:block; }
.payload-side span { color:var(--accent); font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.07em; }
.payload-side strong { margin:27px 0 10px; font-size:21px; overflow-wrap:anywhere; }
.payload-side p { margin:0; color:var(--muted); font-size:13px; }
.payload-cipher { border-color:#4a694d; background:#13251a; }
.payload-cipher strong { font-family:ui-monospace,SFMono-Regular,Menlo,monospace; font-size:16px; color:#b1e9ba; }
.payload-transform { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:3px; color:var(--accent); }
.payload-transform span { color:var(--muted); font-size:11px; }
.payload-transform b { font-size:30px; font-weight:400; }
.visibility-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.visibility-grid article { padding:21px; border:1px solid var(--border); border-radius:16px; background:var(--surface); }
.visibility-grid article > span { color:var(--accent); font-size:11px; font-weight:700; }
.visibility-grid h3 { margin:17px 0 8px; font-size:17px; }
.visibility-grid p { margin:0; color:var(--muted); font-size:13px; }
.call-diagrams { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.call-diagrams > div { padding:22px; border:1px solid var(--border); border-radius:16px; background:var(--surface); }
.route-label { color:var(--accent); font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.07em; }
.simple-route { display:flex; align-items:center; flex-wrap:wrap; gap:8px; margin:22px 0 15px; }
.simple-route b { padding:9px 10px; border:1px solid #385945; border-radius:8px; font-size:12px; }
.simple-route i { color:var(--accent); font-style:normal; }
.call-diagrams p { margin:0; color:var(--muted); font-size:13px; }
.honesty-callout { margin-top:77px; padding:22px 25px; border-left:3px solid #d4ae6b; border-radius:0 11px 11px 0; background:#211d13; color:#dccdb1; font-size:14px; }
.honesty-callout strong { color:#f2d18b; }
.next-reading { display:flex; align-items:center; justify-content:space-between; gap:30px; margin-top:66px; padding:31px; border:1px solid var(--border); border-radius:18px; background:var(--surface); }
.next-reading h2 { margin:0 0 8px; font-size:26px; letter-spacing:-.03em; }
.next-reading p:last-child { max-width:610px; margin:0; color:var(--muted); font-size:14px; }
.next-reading .button { flex:none; }
.comparison-map { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.comparison-map article { padding:26px; border:1px solid var(--border); border-radius:20px; background:var(--surface); }
.comparison-map .ouo-model { border-color:#4b8157; background:linear-gradient(145deg,#142b1c,#0e1c15); }
.comparison-map h2 { margin:0 0 23px; font-size:22px; }
.comparison-map p { margin:20px 0 0; color:var(--muted); font-size:14px; }
.model-route { display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:9px; min-height:105px; }
.model-route span { display:grid; place-items:center; min-height:54px; padding:10px; border:1px solid #42634d; border-radius:10px; background:#0a170f; text-align:center; font-size:12px; font-weight:700; }
.model-route b { color:var(--accent); font-weight:400; }
.comparison-list { display:grid; gap:12px; }
.comparison-row { display:grid; grid-template-columns:220px 1fr 1fr; gap:16px; padding:22px; border:1px solid var(--border); border-radius:15px; background:var(--surface); }
.comparison-row > strong { font-size:15px; }
.comparison-row div { color:var(--muted); font-size:13px; }
.comparison-row div b { display:block; margin-bottom:6px; color:var(--accent); font-size:11px; letter-spacing:.07em; text-transform:uppercase; }
.comparison-row p { margin:0; }
.tradeoff-grid { display:grid; grid-template-columns:1fr 1fr; gap:13px; }
.tradeoff-grid article { padding:25px; border:1px solid var(--border); border-radius:16px; background:var(--surface); }
.tradeoff-grid h3 { margin:0 0 8px; font-size:18px; }
.tradeoff-grid p { margin:0; color:var(--muted); font-size:14px; }
.architecture-grid { display:grid; grid-template-columns:1fr 1fr; gap:13px; }
.architecture-card { padding:25px; border:1px solid #3d7450; border-radius:18px; background:#10251a; }
.architecture-card.roadmap-card { border-color:#5b5140; background:#1c1d15; }
.architecture-status { display:inline-block; padding:5px 9px; border-radius:999px; background:#285138; color:#bceec7; font-size:11px; font-weight:700; }
.roadmap-card .architecture-status { background:#51442b; color:#eed49a; }
.architecture-card h3 { margin:19px 0; font-size:22px; }
.architecture-route { display:flex; align-items:center; flex-wrap:wrap; gap:7px; }
.architecture-route b { padding:9px; border:1px solid #42634d; border-radius:8px; background:#0a170f; font-size:11px; }
.architecture-route i { color:var(--accent); font-style:normal; }
.architecture-card p { margin:20px 0 0; color:var(--muted); font-size:13px; }
.discovery-note { margin-top:13px; padding:17px 21px; border:1px solid var(--border); border-radius:12px; color:var(--muted); background:var(--surface); font-size:13px; }
.discovery-note strong { color:var(--text); }
.data-map { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.data-map article { padding:21px; border:1px solid var(--border); border-radius:15px; background:var(--surface); }
.data-map span,.layer-map span,.scenario-grid span { color:var(--accent); font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.07em; }
.data-map h3 { margin:18px 0 8px; font-size:17px; }
.data-map p { margin:0; color:var(--muted); font-size:13px; }
.observer-map { display:grid; grid-template-columns:1fr 1fr; gap:13px; }
.observer-map article { padding:25px; border:1px solid var(--border); border-radius:16px; background:var(--surface); }
.observer-map h3 { margin:0 0 15px; font-size:19px; }
.observer-map ul { margin:0; padding-left:20px; color:var(--muted); font-size:14px; }
.observer-map li + li { margin-top:7px; }
.settings-demo { display:grid; grid-template-columns:minmax(240px,.75fr) minmax(0,1.25fr); gap:15px; }
.settings-selector { display:grid; gap:8px; }
.settings-selector button { padding:14px 16px; border:1px solid var(--border); border-radius:11px; background:#0b1811; color:var(--text); text-align:left; cursor:pointer; font-size:14px; font-weight:700; }
.settings-selector button span { display:block; margin-top:3px; color:var(--soft); font-size:11px; font-weight:500; }
.settings-selector button.is-active,.settings-selector button:hover { border-color:var(--accent); background:#173323; }
.settings-impact { padding:26px; border:1px solid #386d48; border-radius:15px; background:#102619; }
.settings-impact h3 { margin:0 0 12px; font-size:25px; }
.settings-impact > p:not(.setting-limit) { margin:0; color:var(--muted); font-size:14px; }
.impact-matrix { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:9px; margin-top:29px; }
.impact-matrix div { padding:14px; border:1px solid var(--border); border-radius:10px; background:#0b1b12; }
.impact-matrix span,.impact-matrix strong { display:block; }
.impact-matrix span { margin-bottom:9px; color:var(--accent); font-size:11px; font-weight:700; }
.impact-matrix strong { font-size:12px; font-weight:600; }
.setting-limit { margin:22px 0 0; padding-top:17px; border-top:1px solid var(--border); color:var(--muted); font-size:13px; }
.setting-limit strong { color:var(--text); }
.layer-map,.scenario-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; }
.layer-map article,.scenario-grid article { padding:23px; border:1px solid var(--border); border-radius:15px; background:var(--surface); }
.layer-map h3,.scenario-grid h3 { margin:19px 0 8px; font-size:18px; }
.layer-map p,.scenario-grid p { margin:0; color:var(--muted); font-size:13px; }
.storage-tabs { display:flex; flex-wrap:wrap; gap:7px; margin:26px 0 16px; }
.storage-tabs button { min-height:42px; padding:9px 17px; border:1px solid var(--border); border-radius:9px; background:#0a170f; color:var(--muted); cursor:pointer; font-size:13px; font-weight:700; }
.storage-tabs button.is-active,.storage-tabs button:hover { border-color:var(--accent); background:#214b31; color:var(--text); }
.storage-detail { padding:29px; border:1px solid #3a6848; border-radius:17px; background:#0a1910; }
.storage-detail-head { max-width:700px; }
.storage-detail-head > span { color:var(--accent); font-size:11px; font-weight:700; letter-spacing:.09em; text-transform:uppercase; }
.storage-detail h3 { margin:12px 0 9px; font-size:27px; }
.storage-detail-head p { margin:0; color:var(--muted); font-size:14px; }
.storage-route { display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:13px; margin:29px 0; padding:25px; border:1px solid var(--border); border-radius:13px; background:#10241a; }
.storage-route span { min-width:160px; padding:17px; border:1px solid #497f56; border-radius:11px; background:#0a1a10; text-align:center; font-size:14px; font-weight:700; }
.storage-route i { color:var(--accent); font-size:24px; font-style:normal; }
.storage-facts { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; }
.storage-facts div { padding:15px; border:1px solid var(--border); border-radius:10px; }
.storage-facts span,.storage-facts strong { display:block; }
.storage-facts span { margin-bottom:7px; color:var(--accent); font-size:11px; font-weight:700; }
.storage-facts strong { font-size:12px; font-weight:600; }
.storage-caveat { margin:20px 0 0; padding-top:17px; border-top:1px solid var(--border); color:var(--muted); font-size:13px; }
.storage-caveat strong { color:var(--text); }
.storage-steps,.storage-types { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; }
.storage-steps article,.storage-types article { padding:23px; border:1px solid var(--border); border-radius:15px; background:var(--surface); }
.storage-steps span,.storage-types span { color:var(--accent); font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.07em; }
.storage-steps h3,.storage-types h3 { margin:18px 0 8px; font-size:17px; }
.storage-steps p,.storage-types p { margin:0; color:var(--muted); font-size:13px; }
.storage-download { margin-top:19px; }
.storage-limits { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; }
.storage-limits p { margin:0; padding:20px; border:1px solid var(--border); border-radius:14px; background:var(--surface); color:var(--muted); font-size:13px; }
.storage-limits strong { color:var(--text); }
.system-hero { max-width:980px; padding:54px 0 56px; }
.system-hero h1 { font-size:clamp(43px,4.45vw,59px); }
.system-hero-links { display:flex; flex-wrap:wrap; gap:10px; margin-top:28px; }
.system-section { scroll-margin-top:28px; }
.system-flow { display:flex; align-items:stretch; gap:7px; }
.system-flow article { flex:1; min-width:0; padding:20px; border:1px solid var(--border); border-radius:13px; background:var(--surface); }
.system-flow article span { display:block; color:var(--accent); font-size:11px; font-weight:700; }
.system-flow article strong,.system-flow article small { display:block; }
.system-flow article strong { margin-top:13px; font-size:16px; }
.system-flow article small { margin-top:6px; color:var(--muted); font-size:12px; }
.system-flow > i { display:grid; place-items:center; flex:none; color:var(--accent); font-size:20px; font-style:normal; }
.system-underflow { max-width:840px; margin:18px 0 0; color:var(--muted); font-size:14px; }
.find-switch { margin-top:4px; }
.find-panel { display:grid; grid-template-columns:72px 1fr; gap:22px; padding:26px; border:1px solid #3d7250; border-radius:15px; background:#0b1a11; }
.find-symbol { display:grid; place-items:center; width:67px; height:67px; border:1px solid #64c783; border-radius:16px; background:#1d4b2d; color:#c6f4d2; font-size:31px; font-weight:700; }
.find-panel h3 { margin:0 0 9px; font-size:24px; }
.find-panel p { margin:0; color:var(--muted); font-size:14px; }
.find-steps { display:flex; align-items:center; flex-wrap:wrap; gap:7px; margin:20px 0; }
.find-steps span { padding:9px 11px; border:1px solid var(--border); border-radius:8px; color:#d4e6d8; font-size:12px; font-weight:700; }
.find-steps i { color:var(--accent); font-style:normal; }
.find-panel .find-limit { padding-top:14px; border-top:1px solid var(--border); color:#b8cdbb; font-size:12px; }
.lookup-diagram { display:grid; grid-template-columns:1fr 245px; gap:14px; align-items:center; padding:25px; border:1px solid var(--border); border-radius:18px; background:var(--surface); }
.lookup-main { display:flex; align-items:center; flex-wrap:wrap; gap:9px; }
.lookup-main span { color:var(--muted); font-size:12px; }
.lookup-main b,.lookup-branch b { padding:13px 15px; border:1px solid #408457; border-radius:9px; background:#142a1b; font-size:13px; }
.lookup-main i { color:var(--accent); font-size:22px; font-style:normal; }
.lookup-branch { display:flex; flex-direction:column; gap:7px; align-items:flex-start; padding:18px; border:1px dashed #658367; border-radius:12px; }
.lookup-branch span,.lookup-branch i { color:var(--muted); font-size:12px; font-style:normal; }
.principle-note { margin-top:13px; padding:17px 20px; border-left:3px solid var(--accent); border-radius:0 10px 10px 0; background:#10231a; color:var(--muted); font-size:13px; }
.principle-note strong { color:var(--text); }
.role-grid,.feature-explain-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; }
.role-grid article,.feature-explain-grid article { display:flex; flex-direction:column; align-items:flex-start; padding:23px; border:1px solid var(--border); border-radius:15px; background:var(--surface); }
.role-grid span,.feature-explain-grid span { color:var(--accent); font-size:11px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; }
.role-grid h3,.feature-explain-grid h3 { margin:19px 0 8px; font-size:18px; }
.role-grid p,.feature-explain-grid p { margin:0; color:var(--muted); font-size:13px; }
.feature-explain-grid a { margin-top:auto; padding-top:23px; color:var(--accent-strong); font-size:12px; font-weight:700; text-decoration:none; }
.outage-list { display:grid; grid-template-columns:1fr 1fr; gap:11px; }
.outage-list > div { padding:20px; border:1px solid var(--border); border-radius:13px; background:var(--surface); }
.outage-list strong { font-size:15px; }
.outage-list p { margin:7px 0 0; color:var(--muted); font-size:13px; }
.client-hero { max-width:940px; }
.client-feature-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.client-feature-grid article,.client-visibility-grid article { min-width:0; padding:24px; border:1px solid var(--border); border-radius:16px; background:var(--surface); }
.client-feature-grid article:nth-child(2) { border-color:#63815b; background:#172419; }
.client-feature-grid article:nth-child(3) { border-color:#53795f; background:#11251a; }
.client-feature-grid span,.client-visibility-grid span { color:var(--accent); font-size:11px; font-weight:700; letter-spacing:.07em; text-transform:uppercase; }
.client-feature-grid h3,.client-visibility-grid h3 { margin:25px 0 10px; font-size:19px; line-height:1.2; }
.client-feature-grid p,.client-visibility-grid p { margin:0; color:var(--muted); font-size:13px; }
.client-intro { padding-top:0; }
.client-visibility-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; }
.client-visibility-note { margin:17px 0 0; padding:17px 20px; border-left:3px solid var(--accent); border-radius:0 10px 10px 0; background:#10231a; color:var(--muted); font-size:13px; }
.client-screens { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:24px; align-items:start; }
.client-screens figure { min-width:0; margin:0; text-align:center; }
.client-screen-frame { max-width:260px; margin:auto; padding:7px; border:1px solid #436b50; border-radius:25px; background:#0d1b13; box-shadow:0 25px 55px rgba(0,0,0,.18); }
.client-screen-frame img { display:block; width:100%; height:auto; border-radius:19px; }
.client-screens figcaption { margin-top:15px; color:var(--muted); font-size:13px; }
@media (max-width:960px) {
  .explainer-hero { padding:49px 0 55px; }
  .diagram-section { padding:22px; }
  .flow-track { grid-template-columns:repeat(3,minmax(0,1fr)); }
  .flow-track[data-mode="online"] { grid-template-columns:repeat(3,minmax(0,1fr)); }
  .visibility-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .payload-diagram { grid-template-columns:1fr; }
  .payload-transform { flex-direction:row; }
  .payload-transform b { transform:rotate(90deg); }
  .call-diagrams,.comparison-map,.tradeoff-grid { grid-template-columns:1fr; }
  .comparison-row { grid-template-columns:1fr 1fr; }
  .comparison-row > strong { grid-column:1/-1; }
  .architecture-grid,.observer-map,.settings-demo { grid-template-columns:1fr; }
  .data-map { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .layer-map,.scenario-grid { grid-template-columns:1fr; }
  .storage-steps,.storage-types,.storage-limits { grid-template-columns:1fr; }
  .system-flow { display:grid; grid-template-columns:1fr; }
  .system-flow > i { transform:rotate(90deg); }
  .lookup-diagram { grid-template-columns:1fr; }
  .role-grid,.feature-explain-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .client-feature-grid,.client-visibility-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media (max-width:480px) {
  .explainer-hero h1 { font-size:42px; }
  .system-hero h1 { font-size:37px; }
  .explainer-hero > p:last-child { font-size:16px; }
  .diagram-section { padding:17px; }
  .diagram-heading { align-items:flex-start; }
  .diagram-heading h2 { font-size:27px; }
  .diagram-panel { padding:12px; }
  .flow-track { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .flow-track[data-mode="online"] { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .flow-node { min-height:75px; }
  .flow-detail { grid-template-columns:1fr; padding:18px; }
  .visibility-grid,.comparison-row { grid-template-columns:1fr; }
  .next-reading { flex-direction:column; align-items:stretch; }
  .next-reading .button { width:100%; }
  .data-map,.impact-matrix { grid-template-columns:1fr; }
  .storage-facts { grid-template-columns:1fr; }
  .storage-detail { padding:19px; }
  .storage-route { padding:16px; gap:8px; }
  .storage-route span { min-width:100%; }
  .storage-route i { transform:rotate(90deg); }
  .find-panel { grid-template-columns:1fr; padding:18px; }
  .find-steps { align-items:stretch; flex-direction:column; }
  .find-steps i { transform:rotate(90deg); align-self:center; }
  .lookup-main { flex-direction:column; align-items:stretch; text-align:center; }
  .lookup-main i { transform:rotate(90deg); }
  .role-grid,.feature-explain-grid,.outage-list { grid-template-columns:1fr; }
  .client-feature-grid,.client-visibility-grid { grid-template-columns:1fr; }
  .client-screens { grid-template-columns:1fr; gap:35px; }
}