:root {
  color-scheme: dark;
  --ink: #f7f3ea;
  --muted: #b8b0a5;
  --quiet: #8d857a;
  --line: rgba(247, 243, 234, .14);
  --panel: rgba(16, 16, 16, .9);
  --panel-2: rgba(34, 33, 31, .74);
  --panel-3: rgba(7, 7, 7, .72);
  --black: #070707;
  --carbon: #111214;
  --steel: #c9c2b8;
  --red: #a80f1a;
  --gold: #b99b5f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 74% 8%, rgba(168, 15, 26, .16), transparent 24%),
    linear-gradient(135deg, #040404 0%, #111214 48%, #070707 100%);
  color: var(--ink);
  font-family: Avenir Next, Helvetica Neue, Arial, sans-serif;
  letter-spacing: 0;
}

button,
a {
  font: inherit;
}

button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.topbar {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px clamp(16px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 7, 7, .88);
  backdrop-filter: blur(16px);
}

.private-mark,
.scope-line,
.panel-head span,
.action-card > span,
.portal article span,
.thread-core span,
.signal-grid span {
  display: block;
  color: var(--gold);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 620px;
  margin-bottom: 0;
  font-family: Georgia, Times New Roman, serif;
  font-size: clamp(22px, 4vw, 42px);
  font-weight: 540;
  line-height: 1.05;
}

h2 {
  margin-bottom: 12px;
  font-family: Georgia, Times New Roman, serif;
  font-size: clamp(34px, 6.4vw, 76px);
  font-weight: 520;
  line-height: .96;
}

h3 {
  margin-bottom: 10px;
  font-size: 17px;
  line-height: 1.18;
}

p,
span,
li {
  line-height: 1.5;
}

p,
li {
  color: var(--muted);
}

main {
  padding-bottom: 54px;
}

.signout {
  flex: 0 0 auto;
  padding: 10px 14px;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, .94fr) minmax(340px, .68fr);
  gap: clamp(22px, 5vw, 70px);
  align-items: stretch;
  min-height: 610px;
  padding: clamp(30px, 6vw, 74px) clamp(16px, 4vw, 48px) 28px;
}

.hero-copy {
  align-self: center;
  max-width: 900px;
}

.hero-copy p:not(.scope-line) {
  max-width: 730px;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary {
  padding: 0 18px;
  color: #fff;
  background: var(--red);
  border-color: rgba(255, 255, 255, .18);
}

.secondary {
  padding: 0 16px;
  color: var(--ink);
  background: rgba(255, 255, 255, .08);
}

.wide {
  width: 100%;
}

.thread-map,
.panel,
.source-strip {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 26px 80px rgba(0, 0, 0, .28);
}

.thread-map {
  position: relative;
  min-height: 470px;
  padding: 28px;
  overflow: hidden;
}

.thread-map:before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(185, 155, 95, .22);
  border-radius: 8px;
  pointer-events: none;
}

.thread-core {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 238px;
  margin: 16px auto 22px;
  padding: 30px;
  text-align: center;
  border: 1px solid rgba(247, 243, 234, .18);
  border-radius: 50%;
  background:
    conic-gradient(from 220deg, rgba(168, 15, 26, .92), rgba(185, 155, 95, .52), rgba(247, 243, 234, .12), rgba(168, 15, 26, .92));
}

.thread-core:after {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: 50%;
  background: #090909;
  border: 1px solid rgba(255, 255, 255, .12);
}

.thread-core > * {
  position: relative;
  z-index: 1;
  max-width: 250px;
}

.thread-core strong {
  display: block;
  margin: 6px 0;
  font-family: Georgia, Times New Roman, serif;
  font-size: clamp(30px, 4vw, 44px);
}

.thread-core p {
  margin-bottom: 0;
  color: var(--steel);
  font-size: 14px;
}

.thread-strands {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.thread-strands span,
.signal-grid article,
.portal article,
.action-card,
.source-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
}

.thread-strands span {
  min-height: 52px;
  display: grid;
  place-items: center;
  padding: 10px;
  color: var(--steel);
  font-size: 12px;
  text-align: center;
}

.signal-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.signal-grid article,
.portal article {
  padding: 16px;
}

.signal-grid strong,
.portal strong {
  display: block;
  margin-top: 6px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.28;
}

.view-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px clamp(16px, 4vw, 48px) 0;
}

.view-hint {
  margin: 0;
  max-width: 60ch;
}

.view-switcher {
  display: inline-flex;
  gap: 4px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
}

.view-switcher .view-btn {
  min-height: 34px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  padding: 6px 16px;
  cursor: pointer;
}

.view-switcher .view-btn.active {
  background: rgba(168, 15, 26, .86);
  color: #fff;
}

/* Immediate hides the longer-horizon rail surfaces; Long term reveals them.
   One CSS reaction off body[data-view], applied app-wide with no re-mount. */
body[data-view="immediate"] [data-detail="advanced"] {
  display: none;
}

.rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 clamp(16px, 4vw, 48px) 18px;
  scrollbar-width: thin;
}

.rail button {
  flex: 0 0 auto;
  padding: 0 14px;
  color: var(--muted);
  background: rgba(255, 255, 255, .05);
}

.rail button.is-active {
  color: #fff;
  background: rgba(168, 15, 26, .86);
  border-color: rgba(255, 255, 255, .2);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(310px, 430px);
  gap: 18px;
  padding: 0 clamp(16px, 4vw, 48px);
}

.panel {
  min-width: 0;
  padding: clamp(18px, 3vw, 28px);
}

.panel-head {
  max-width: 790px;
  margin-bottom: 20px;
}

.panel-head h2 {
  font-size: clamp(28px, 4vw, 52px);
}

.panel-head.compact h3 {
  font-family: Georgia, Times New Roman, serif;
  font-size: 28px;
}

.route-body {
  min-height: 360px;
}

.item-grid,
.source-list {
  display: grid;
  gap: 14px;
}

.item-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.action-card,
.source-panel {
  padding: 18px;
}

.action-card p {
  min-height: 76px;
  margin-bottom: 14px;
}

.wide-card {
  max-width: 760px;
}

.checklist,
.source-list {
  margin: 0;
  padding-left: 18px;
}

.checklist {
  columns: 2;
  column-gap: 28px;
  margin-bottom: 18px;
}

.checklist li,
.source-list li {
  break-inside: avoid;
  margin-bottom: 8px;
}

.checklist li.is-open {
  color: var(--ink);
}

.source-panel {
  margin-top: 14px;
}

.client-preview {
  position: sticky;
  top: 96px;
  align-self: start;
}

.portal {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.copy-state {
  min-height: 22px;
  margin: 12px 0 0;
  color: var(--quiet);
  font-size: 13px;
}

.source-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 22px clamp(16px, 4vw, 48px) 0;
  overflow: hidden;
  background: var(--line);
}

.source-strip div {
  min-height: 120px;
  padding: 18px;
  background: rgba(7, 7, 7, .86);
}

.source-strip strong {
  display: block;
  margin-bottom: 8px;
}

.source-strip span {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .hero,
  .workspace,
  .source-strip {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
  }

  .client-preview {
    position: static;
  }
}

@media (max-width: 620px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .signout {
    width: 100%;
    text-align: center;
  }

  .hero {
    padding-top: 26px;
  }

  .thread-map {
    min-height: 0;
    padding: 20px;
  }

  .thread-core {
    min-height: 210px;
  }

  .thread-strands,
  .signal-grid,
  .item-grid {
    grid-template-columns: 1fr;
  }

  .checklist {
    columns: 1;
  }
}