:root {
  color-scheme: dark;
  --ink: #101512;
  --ink-soft: #18211b;
  --ink-lift: #202c24;
  --paper: #e7e4d8;
  --paper-dim: #b8bdb2;
  --line: #425149;
  --line-soft: rgba(185, 205, 191, 0.16);
  --teal: #7fe0cf;
  --amber: #e9b76d;
  --coral: #e18c78;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html { background: var(--ink); }

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(90deg, transparent 0, transparent calc(50% - 600px), rgba(127, 224, 207, 0.035) calc(50% - 600px), transparent calc(50% - 599px)),
    var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
}

button, a { font: inherit; }

a { color: inherit; }

.site-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.topbar {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--teal);
  color: var(--teal);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.brand-name, .brand-subtitle { display: block; }
.brand-name { color: var(--paper); font-weight: 700; letter-spacing: 0.03em; }
.brand-subtitle { color: var(--paper-dim); font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; }
.host-status { color: var(--paper-dim); font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 12px rgba(127, 224, 207, 0.7); }

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 720px) minmax(250px, 1fr);
  align-items: start;
  gap: 44px;
  padding: 34px 0 38px;
}
.eyebrow, .signal-label, .index-heading, .post-kicker, .post-meta, .section-label, .revision-heading, .story-map-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.eyebrow { margin: 0 0 20px; color: var(--teal); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 700px; margin-bottom: 16px; color: var(--paper); font-family: var(--serif); font-size: clamp(38px, 4vw, 54px); font-weight: 400; letter-spacing: -0.045em; line-height: 0.98; }
.dek { max-width: 630px; margin-bottom: 0; color: var(--paper-dim); font-size: 16px; }
.current-signal { margin-top: 28px; border-left: 1px solid var(--amber); padding: 6px 0 6px 16px; }
.signal-label { color: var(--amber); }
.signal-title { margin: 16px 0 8px; color: var(--paper); font-family: var(--serif); font-size: 25px; line-height: 1.05; }
.signal-meta { color: var(--paper-dim); font-family: var(--mono); font-size: 11px; }

.cadence-tabs { display: flex; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.cadence-tab { position: relative; padding: 17px 24px 15px 0; margin-right: 28px; border: 0; background: transparent; color: var(--paper-dim); cursor: pointer; font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }
.cadence-tab::after { position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; background: transparent; content: ""; }
.cadence-tab:hover, .cadence-tab:focus-visible { color: var(--paper); }
.cadence-tab:focus-visible, .post-link:focus-visible { outline: 2px solid var(--amber); outline-offset: 4px; }
.cadence-tab.is-active { color: var(--teal); }
.cadence-tab.is-active::after { background: var(--teal); }
.cadence-tab span { color: var(--paper-dim); }

.workspace { display: grid; grid-template-columns: 310px minmax(0, 1fr); min-height: 620px; }
.post-index { border-right: 1px solid var(--line); padding: 29px 30px 50px 0; }
.index-heading { display: flex; align-items: center; gap: 13px; color: var(--paper-dim); }
.index-rule { display: block; flex: 1; height: 1px; background: var(--line); }
.post-list { margin-top: 18px; }
.post-link { display: block; width: 100%; padding: 19px 0 19px 15px; border: 0; border-left: 2px solid transparent; background: transparent; color: var(--paper-dim); cursor: pointer; text-align: left; }
.post-link + .post-link { border-top: 1px solid var(--line-soft); }
.post-link:hover { color: var(--paper); }
.post-link.is-selected { border-left-color: var(--teal); color: var(--paper); background: linear-gradient(90deg, rgba(127, 224, 207, 0.09), transparent); }
.post-link-date { display: block; margin-bottom: 6px; color: var(--teal); font-family: var(--mono); font-size: 11px; letter-spacing: 0.05em; }
.post-link-title { display: block; color: inherit; font-family: var(--serif); font-size: 21px; line-height: 1.08; }
.post-link-meta { display: block; margin-top: 9px; color: #87938a; font-family: var(--mono); font-size: 10px; letter-spacing: 0.04em; }
.revision-note { display: flex; gap: 10px; margin-top: 35px; padding-top: 18px; border-top: 1px solid var(--line); color: #97a39a; font-size: 13px; }
.revision-note p { margin: 0; }
.revision-note strong { color: var(--paper); font-weight: 600; }
.revision-icon { color: var(--amber); font-size: 20px; line-height: 1; }

.post-detail { min-width: 0; padding: 46px 0 80px 62px; }
.loading-line, .empty-line, .error-line { color: var(--paper-dim); font-family: var(--mono); font-size: 12px; }
.post-header { max-width: 720px; padding-bottom: 31px; border-bottom: 1px solid var(--line); }
.post-kicker { margin-bottom: 17px; color: var(--amber); }
.post-title { margin-bottom: 18px; color: var(--paper); font-family: var(--serif); font-size: clamp(36px, 5vw, 60px); font-weight: 400; letter-spacing: -0.04em; line-height: 0.98; }
.post-summary { margin-bottom: 22px; color: var(--paper-dim); font-size: 18px; }
.why-this-matters { max-width: 620px; margin: -4px 0 23px; padding-left: 14px; border-left: 2px solid var(--amber); color: #c4c9c0; font-size: 14px; }
.why-this-matters strong { color: var(--amber); font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; }
.post-meta { display: flex; flex-wrap: wrap; gap: 12px 22px; color: #96a399; font-size: 10px; letter-spacing: 0.06em; }
.meta-accent { color: var(--teal); }
.post-body { max-width: 720px; }
.story-map { margin: 31px 0 2px; padding: 14px 0 17px; border-bottom: 1px solid var(--line-soft); }
.story-map-label { display: block; margin-bottom: 11px; color: var(--paper-dim); }
.story-map ol { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; counter-reset: story-beat; }
.story-map-item { color: #9da99f; font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; }
.story-map-item + .story-map-item::before { margin: 0 8px 0 1px; color: var(--line); content: "→"; }
.story-map-aim { color: var(--teal); }
.story-map-snag { color: var(--amber); }
.story-map-fix { color: var(--teal); }
.story-map-realization { color: var(--coral); }
.story-map-proof { color: var(--paper-dim); }
.story-map-next { color: var(--amber); }
.section-block { margin: 23px 0 0; padding: 20px 0 4px 20px; border-left: 2px solid var(--line); }
.story-beat-aim { border-left-color: var(--teal); }
.story-beat-snag { border-left-color: var(--amber); }
.story-beat-fix { border-left-color: var(--teal); }
.story-beat-realization { border-left-color: var(--coral); }
.story-beat-proof { border-left-color: var(--line); }
.story-beat-next { border-left-color: var(--amber); }
.section-label { margin-bottom: 12px; color: var(--teal); }
.story-beat-snag .section-label { color: var(--amber); }
.story-beat-realization .section-label { color: var(--coral); }
.story-beat-next .section-label { color: var(--amber); }
.section-block p { color: #c4c9c0; font-size: 16px; }
.evidence-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.evidence-list li { position: relative; padding-left: 18px; color: #c4c9c0; }
.evidence-list li::before { position: absolute; top: 0.66em; left: 0; width: 6px; height: 6px; background: var(--teal); content: ""; }
.section-visual { margin: 24px 0 8px; }
.section-visual img { display: block; width: 100%; height: auto; background: #07131a; }
.section-visual figcaption { padding-top: 9px; color: #9eaa9f; font-size: 12px; }
.lead-visual { min-width: 0; }
.post-hero { max-width: 720px; margin: 0; border-bottom: 1px solid var(--line); }
.post-hero figure { margin: 0; }
.post-hero img { display: block; width: 100%; height: auto; object-fit: contain; background: #07131a; }
.post-hero figcaption { padding: 14px 0 16px; color: #aeb8ad; font-size: 13px; }
.visual-disclosure { display: block; margin-top: 5px; color: var(--amber); font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; }
.visual-policy { display: inline-block; margin-top: 7px; color: #91a59a; font-family: var(--mono); font-size: 10px; text-underline-offset: 3px; }
.visual-policy:hover, .visual-policy:focus-visible { color: var(--teal); }
.dev-chat { margin: 30px 0 4px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.chat-header { display: flex; align-items: end; justify-content: space-between; gap: 20px; padding: 18px 0 15px; }
.chat-eyebrow, .chat-disclosure, .chat-byline span, .chat-note { font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; }
.chat-eyebrow { display: block; margin-bottom: 5px; color: var(--teal); }
.chat-header h3 { margin: 0; color: var(--paper); font-family: var(--serif); font-size: 25px; font-weight: 400; letter-spacing: -0.02em; }
.chat-disclosure { flex: 0 0 auto; color: var(--amber); }
.dev-chat ol { margin: 0; padding: 0; list-style: none; }
.chat-message { display: grid; grid-template-columns: 60px minmax(0, 1fr); gap: 15px; min-width: 0; padding: 13px 0; border-top: 1px solid var(--line-soft); }
.chat-avatar { position: relative; display: grid; place-items: center; width: 60px; height: 60px; overflow: hidden; border: 1px solid var(--line); background: #172019; color: var(--paper-dim); font-family: var(--mono); font-size: 11px; }
.chat-avatar img { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: cover; }
.chat-copy { min-width: 0; }
.chat-byline { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; margin-bottom: 4px; }
.chat-byline strong { color: var(--paper); font-size: 13px; }
.chat-byline span { color: #859289; }
.chat-copy p { margin: 0; color: #c4c9c0; font-size: 15px; overflow-wrap: anywhere; }
.chat-accent-cyan .chat-avatar { border-color: rgba(127, 224, 207, 0.62); }
.chat-accent-amber .chat-avatar { border-color: rgba(233, 183, 109, 0.72); }
.chat-accent-paper .chat-avatar { border-color: rgba(231, 228, 216, 0.46); }
.chat-result { margin: 0; padding: 14px 0; border-top: 1px solid var(--line); color: #cbd1c8; font-size: 14px; }
.chat-result strong { color: var(--teal); font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; }
.chat-note { margin: 0; padding: 13px 0 16px; border-top: 1px solid var(--line-soft); color: #849187; line-height: 1.6; text-transform: none; }
.revision-history { margin-top: 42px; padding-top: 21px; border-top: 1px solid var(--line); }
.revision-heading { margin-bottom: 13px; color: var(--paper-dim); }
.revision-entry { border-top: 1px solid var(--line-soft); }
.revision-row {
  display: grid;
  grid-template-columns: 20px 38px 138px minmax(0, 1fr) max-content;
  grid-template-areas: "marker revision time text action";
  column-gap: 12px;
  align-items: start;
  min-width: 0;
  padding: 11px 0;
  color: #aab4aa;
  font-size: 13px;
  cursor: pointer;
  list-style: none;
}
.revision-row::-webkit-details-marker { display: none; }
.revision-row::before { grid-area: marker; color: var(--amber); content: "＋"; font-family: var(--mono); font-size: 12px; }
.revision-entry[open] .revision-row::before { content: "−"; }
.revision-number, .revision-time { font-family: var(--mono); font-size: 11px; }
.revision-number { grid-area: revision; color: var(--teal); }
.revision-time { grid-area: time; color: #7e8c82; white-space: nowrap; }
.revision-text { grid-area: text; min-width: 0; line-height: 1.45; overflow-wrap: anywhere; }
.revision-action { grid-area: action; color: var(--amber); font-family: var(--mono); font-size: 10px; letter-spacing: 0.05em; line-height: 1.45; text-transform: uppercase; white-space: nowrap; }
.revision-row:focus-visible { outline: 2px solid var(--amber); outline-offset: 4px; }
.revision-detail { margin: 4px 0 18px 32px; padding: 16px 18px 2px; border-left: 1px solid var(--line); background: rgba(127, 224, 207, 0.03); }
.revision-summary-copy { max-width: 620px; color: var(--paper-dim); }
.revision-section { margin: 18px 0; }
.revision-section p { max-width: 620px; color: #b4beb4; font-size: 14px; }
.revision-visual { max-width: 620px; margin: 0 0 16px; }
.revision-visual img { display: block; width: 100%; height: auto; object-fit: contain; background: #07131a; }
.revision-visual figcaption { padding-top: 9px; color: #9eaa9f; font-size: 12px; }
.closing-visual { margin: 48px 0 0; padding-top: 24px; border-top: 1px solid var(--line); }
.closing-visual img { display: block; width: 100%; height: auto; background: #07131a; }
.closing-visual figcaption { padding: 12px 0 0; color: #aeb8ad; font-size: 13px; }

.footer { display: flex; flex-wrap: wrap; gap: 8px 30px; padding: 23px 0 34px; border-top: 1px solid var(--line); color: #7f8d82; font-family: var(--mono); font-size: 10px; letter-spacing: 0.04em; }
.footer strong { color: var(--paper-dim); font-weight: 500; }

@media (max-width: 820px) {
  .site-shell { width: min(100% - 28px, 700px); }
  .topbar { min-height: 68px; }
  .host-status { display: none; }
  .masthead { display: flex; flex-direction: column; gap: 28px; padding: 22px 0 30px; }
  .lead-visual { order: -1; width: 100%; }
  h1 { font-size: clamp(38px, 11vw, 56px); }
  .dek { font-size: 17px; }
  .current-signal { margin-top: 25px; }
  .workspace { display: block; min-height: 0; }
  .post-index { border-right: 0; padding: 27px 0 0; }
  .post-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 0 18px; }
  .post-link { padding-left: 11px; }
  .revision-note { margin-bottom: 12px; }
  .post-detail { padding: 44px 0 65px; }
  .post-title { font-size: clamp(38px, 11vw, 56px); }
  .revision-row {
    grid-template-columns: 20px 42px minmax(0, 1fr) max-content;
    grid-template-areas:
      "marker revision text text"
      ". time time action";
    row-gap: 5px;
    padding: 13px 0;
  }
  .revision-detail { margin-left: 20px; }
}

@media (max-width: 500px) {
  .cadence-tab { margin-right: 17px; padding-right: 0; font-size: 11px; }
  .post-list { display: block; }
  .post-link { padding-left: 10px; }
  .post-meta { display: block; line-height: 1.9; }
  .post-meta span { display: block; }
  .story-map-item + .story-map-item::before { margin-right: 5px; }
  .section-block { padding-left: 14px; }
  .chat-header { align-items: start; }
  .chat-disclosure { max-width: 110px; text-align: right; }
  .chat-message { grid-template-columns: 48px minmax(0, 1fr); gap: 12px; }
  .chat-avatar { width: 48px; height: 48px; }
  .revision-row {
    grid-template-columns: 20px minmax(0, 1fr);
    grid-template-areas:
      "marker revision"
      ". text"
      ". time"
      ". action";
    row-gap: 6px;
  }
  .revision-detail { margin-left: 20px; padding-right: 8px; padding-left: 14px; }
  .footer { display: block; }
  .footer div + div { margin-top: 8px; }
}

@media (prefers-reduced-motion: no-preference) {
  .post-detail { animation: reveal 360ms ease-out both; }
  @keyframes reveal { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
}