:root {
  --ink: #1e1c21;
  --ink-soft: rgba(30, 28, 33, 0.68);
  --ink-rule: rgba(30, 28, 33, 0.12);
  --mauve-deep: #3d3340;
  --mauve-mid: #8b7881;
  --mauve-pale: #ede9eb;
  --pewter-deep: #404855;
  --pewter-pale: #e8eaed;
  --warm-white: #faf8f8;
  --white: #ffffff;
  --shadow: 0 20px 50px rgba(30, 28, 33, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --page-side: clamp(18px, 4vw, 52px);
}

* { box-sizing: border-box; }

html {
  background: linear-gradient(180deg, var(--warm-white) 0%, var(--pewter-pale) 100%);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(139, 120, 129, 0.16), transparent 34%),
    radial-gradient(circle at bottom right, rgba(64, 72, 85, 0.12), transparent 28%),
    linear-gradient(180deg, var(--warm-white) 0%, #f2f0f1 100%);
  font-family: 'IBM Plex Serif', Georgia, serif;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }

.app-shell {
  min-height: 100vh;
  padding: clamp(18px, 4vh, 34px) var(--page-side) 94px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
  padding: 12px 0 16px;
  background: linear-gradient(180deg, rgba(250,248,248,0.96), rgba(250,248,248,0.74), rgba(250,248,248,0));
  backdrop-filter: blur(10px);
}

.brand { display: grid; gap: 4px; }

.brand__eyebrow,
.eyebrow,
.meta-line,
.status-label,
.panel-link,
.bottom-nav__label,
.signal-open-copy {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 11px;
  color: var(--ink-soft);
}

.brand__title {
  font-family: 'Sora', sans-serif;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.top-nav,
.lens-switcher,
.reaction-row,
.experiment-actions,
.reader-bar__controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.top-nav__link,
.ghost-button,
.lens-button,
.reaction-button {
  border: 1px solid var(--ink-rule);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.78);
  color: var(--ink-soft);
}

.top-nav__link.is-active,
.reaction-button.is-active,
.lens-button.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--warm-white);
}

.page-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}

.panel {
  border: 1px solid var(--ink-rule);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.82);
  box-shadow: var(--shadow);
  padding: 20px;
}

.panel--subtle {
  background: rgba(255,255,255,0.62);
}

.hero {
  background:
    linear-gradient(135deg, rgba(237,233,235,0.96), rgba(255,255,255,0.92)),
    var(--white);
}

.hero__meta,
.panel__header,
.hero__content {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.hero__content { margin-top: 18px; }
.hero__content--home { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.9fr); }
.hero__status { display: grid; gap: 12px; width: 100%; }
.hero__status--compact { align-content: start; }

h1, h2, h3, strong {
  margin: 0;
  font-family: 'Sora', sans-serif;
  font-weight: 800;
  line-height: 1.04;
}

h1 { font-size: clamp(36px, 5vw, 60px); letter-spacing: -0.05em; }
h2 { font-size: clamp(26px, 3vw, 34px); letter-spacing: -0.05em; }
h3 { font-size: 20px; letter-spacing: -0.04em; }

.hero__lede,
.section-intro,
.brief-card p,
.brief-bullet p,
.signal-summary,
.signal-why,
.signal-so-what,
.status-card__body,
.experiment-row__detail p,
.evidence-link span:last-child {
  line-height: 1.65;
}

.hero__lede { margin: 16px 0 0; max-width: 58ch; font-size: clamp(18px, 2vw, 21px); }
.section-intro { margin: 14px 0 0; max-width: 44ch; color: var(--ink-soft); }
.page-title { max-width: 12ch; }

.status-card,
.brief-card {
  border: 1px solid var(--ink-rule);
  border-radius: var(--radius-md);
  background: var(--white);
  padding: 16px;
}

.status-card strong {
  display: block;
  margin-top: 10px;
  font-size: 20px;
  line-height: 1.4;
}

.status-card__body {
  margin: 10px 0 0;
  color: var(--ink-soft);
}

.chip,
.status-pill,
.summary-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.chip {
  border: 1px solid var(--ink-rule);
  padding: 7px 11px;
  background: var(--warm-white);
  color: var(--pewter-deep);
}

.chip--dark {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--warm-white);
}

.chip--warm {
  background: var(--mauve-pale);
  color: var(--mauve-deep);
}

.brief-bullets {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.brief-bullets--compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.brief-bullet {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.brief-bullet__mark {
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--mauve-mid), var(--pewter-deep));
}

.brief-bullet p {
  margin: 0;
  font-size: 16px;
}

.brief-actions {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.brief-action {
  display: grid;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--ink-rule);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.94);
}

.brief-action__topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.brief-action p {
  margin: 0;
  color: var(--ink-soft);
}

.signal-evidence-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.evidence-link {
  display: grid;
  gap: 8px;
  min-height: 100%;
  padding: 14px 16px;
  border: 1px solid var(--ink-rule);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.94);
}

.evidence-link strong {
  font-size: 18px;
  line-height: 1.2;
}

.evidence-link span:last-child {
  color: var(--ink-soft);
  font-size: 14px;
}

.reader-shell {
  position: relative;
  padding: 18px;
  overflow: hidden;
}

.reader-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.reader-bar__primary {
  display: grid;
  gap: 6px;
}

.reader-progress {
  font-family: 'Sora', sans-serif;
  font-size: 24px;
  letter-spacing: -0.05em;
}

.reader-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.titles-list {
  display: grid;
  gap: 8px;
}

.title-link {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--ink-rule);
  border-radius: 16px;
  background: rgba(255,255,255,0.8);
  color: var(--ink-soft);
  text-align: left;
}

.title-link.is-active {
  border-color: var(--ink);
  background: rgba(30,28,33,0.06);
  color: var(--ink);
}

.title-link__count {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
}

.title-link__copy {
  font-size: 14px;
  line-height: 1.45;
}

.signals-viewport {
  height: calc(100dvh - 230px);
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.signals-feed {
  height: 100%;
}

.signal-stage {
  position: relative;
  height: 100%;
}

.signal-slide {
  position: absolute;
  inset: 0;
  padding: 0 0 18px;
  opacity: 0;
  transform: translate3d(0, 0, 0);
  pointer-events: none;
}

.signal-slide.is-current {
  opacity: 1;
  pointer-events: auto;
}

.signal-slide.is-entering--forward {
  transform: translate3d(0, 14%, 0);
}

.signal-slide.is-entering--backward {
  transform: translate3d(0, -14%, 0);
}

.signal-slide.is-leaving--forward {
  transform: translate3d(0, 0, 0);
}

.signal-slide.is-leaving--backward {
  transform: translate3d(0, 0, 0);
}

.signal-slide.is-entering.is-animating,
.signal-slide.is-leaving.is-animating {
  transition:
    transform 320ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.signal-slide.is-entering.is-animating {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  pointer-events: auto;
}

.signal-slide.is-leaving--forward.is-animating {
  opacity: 0;
  transform: translate3d(0, -10%, 0);
}

.signal-slide.is-leaving--backward.is-animating {
  opacity: 0;
  transform: translate3d(0, 10%, 0);
}

.signal-page__inner {
  min-height: calc(100dvh - 248px);
  display: grid;
  align-content: space-between;
  gap: 16px;
  padding: 26px;
  border: 1px solid var(--ink-rule);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.98), rgba(237,233,235,0.82)),
    var(--white);
}

.signal-page__meta,
.signal-page__actions,
.signal-detail-meta,
.experiment-row__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.signal-page__copy {
  display: grid;
  gap: 14px;
  max-width: 60ch;
}

.signal-headline-block {
  display: grid;
  gap: 10px;
}

.signal-kicker {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mauve-mid);
}

.signal-page__count {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mauve-mid);
}

.signal-headline {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 0.98;
  letter-spacing: -0.06em;
  max-width: 11ch;
}

.signal-summary,
.signal-why,
.signal-so-what {
  margin: 0;
  font-size: 17px;
}

.signal-why {
  color: var(--mauve-deep);
}

.signal-so-what-card {
  display: grid;
  gap: 8px;
  max-width: 34rem;
  padding: 14px 16px;
  border: 1px solid var(--ink-rule);
  border-radius: 18px;
  background: rgba(255,255,255,0.72);
}

.signal-so-what {
  color: var(--ink-soft);
}

.signal-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--ink-rule);
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.signal-action--primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--warm-white);
}

.titles-sheet {
  position: absolute;
  inset: 18px;
  display: grid;
  align-content: start;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--ink-rule);
  border-radius: var(--radius-lg);
  background: rgba(250,248,248,0.96);
  backdrop-filter: blur(18px);
  z-index: 20;
}

.titles-sheet[hidden] {
  display: none !important;
}

.titles-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(250, 248, 248, 0.56);
  z-index: 15;
}

.titles-backdrop[hidden] {
  display: none !important;
}

.titles-sheet__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.signal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.signal-tags span {
  background: var(--pewter-pale);
  border-radius: 999px;
  padding: 6px 10px;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.reaction-row--stack {
  display: grid;
}

.detail-link {
  color: var(--mauve-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.detail-link--inline {
  display: inline-block;
  margin-top: 10px;
}

.status-pill,
.summary-pill {
  padding: 6px 10px;
  border: 1px solid var(--ink-rule);
}

.status-pill--queued,
.status-pill--needs-review {
  background: rgba(237,233,235,0.92);
  color: var(--mauve-deep);
}

.status-pill--trying,
.status-pill--verified {
  background: rgba(232,234,237,0.95);
  color: var(--pewter-deep);
}

.status-pill--adopted {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--warm-white);
}

.experiment-summary-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.summary-pill {
  border-radius: 999px;
  background: rgba(255,255,255,0.82);
  color: var(--ink-soft);
}

.experiment-table {
  display: grid;
  gap: 12px;
}

.experiment-table__head,
.experiment-row__summary {
  display: grid;
  grid-template-columns: 130px minmax(0, 1.5fr) minmax(0, 1.2fr) 110px 70px;
  gap: 12px;
  align-items: start;
}

.experiment-table__head {
  padding: 0 0 10px;
  border-bottom: 1px solid var(--ink-rule);
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.experiment-row {
  border-top: 1px solid var(--ink-rule);
  padding-top: 12px;
}

.experiment-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.experiment-row summary {
  list-style: none;
  cursor: pointer;
}

.experiment-row summary::-webkit-details-marker {
  display: none;
}

.experiment-row__title {
  font-family: 'Sora', sans-serif;
  font-size: 16px;
  line-height: 1.25;
}

.experiment-row__detail {
  margin-top: 14px;
  margin-left: 142px;
  padding: 16px;
  border: 1px solid var(--ink-rule);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.9);
}

.experiment-row__detail p {
  margin: 0 0 10px;
}

.bottom-nav {
  position: fixed;
  left: 14px;
  right: 14px;
  bottom: 14px;
  display: none;
  justify-content: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--ink-rule);
  border-radius: 24px;
  background: rgba(250,248,248,0.94);
  backdrop-filter: blur(18px);
  box-shadow: 0 16px 40px rgba(30, 28, 33, 0.12);
  z-index: 50;
}

.bottom-nav__item {
  min-width: 92px;
  display: grid;
  justify-items: center;
  gap: 6px;
  padding: 10px 8px;
  border: 1px solid transparent;
  border-radius: 16px;
  color: var(--ink-soft);
}

.bottom-nav__item.is-active {
  background: transparent;
  border-color: transparent;
  color: var(--ink);
}

.bottom-nav__icon {
  display: block;
  width: 16px;
  height: 16px;
  position: relative;
}

.bottom-nav__item.is-active .bottom-nav__icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--ink);
  color: var(--warm-white);
}

.bottom-nav__item.is-active .bottom-nav__label {
  color: var(--ink);
}

.bottom-nav__icon::before,
.bottom-nav__icon::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1.5px solid currentColor;
  border-radius: 4px;
}

.bottom-nav__icon--signals::after {
  inset: 3px 1px 3px 1px;
  border-top: 0;
  border-left: 0;
  border-right: 0;
  border-radius: 0;
}

.bottom-nav__icon--experiments::before { border-radius: 999px; }
.bottom-nav__icon--experiments::after { inset: 3px; border-radius: 999px; }

.signal-detail-hero {
  background:
    linear-gradient(135deg, rgba(237,233,235,0.92), rgba(255,255,255,0.94)),
    var(--white);
}

.panel--span-12 { grid-column: span 12; }
.panel--span-9 { grid-column: span 9; }
.panel--span-8 { grid-column: span 8; }
.panel--span-7 { grid-column: span 7; }
.panel--span-5 { grid-column: span 5; }
.panel--span-4 { grid-column: span 4; }
.panel--span-3 { grid-column: span 3; }

@media (max-width: 1180px) {
  .signal-evidence-list,
  .brief-bullets--compact {
    grid-template-columns: 1fr 1fr;
  }

  .experiment-table__head,
  .experiment-row__summary {
    grid-template-columns: 110px minmax(0, 1.4fr) minmax(0, 1.1fr) 90px 60px;
  }
}

@media (max-width: 1040px) {
  .hero__content--home,
  .page-grid {
    grid-template-columns: 1fr;
  }

  .panel--span-12,
  .panel--span-9,
  .panel--span-8,
  .panel--span-7,
  .panel--span-5,
  .panel--span-4,
  .panel--span-3 {
    grid-column: span 1;
  }

  .signal-evidence-list,
  .brief-bullets--compact {
    grid-template-columns: 1fr;
  }

  .experiment-row__detail {
    margin-left: 0;
  }
}

@media (max-width: 820px) {
  body[data-page="signals"] {
    overflow: hidden;
  }
  body[data-page="signals"] .app-shell {
    height: 100dvh;
    overflow: hidden;
  }
  body[data-page="signals"] main.page-grid {
    height: calc(100dvh - 142px);
  }
  .app-shell { padding-bottom: 104px; }
  .top-nav { display: none; }
  .bottom-nav { display: flex; }
  .site-header { align-items: start; }
  .brand__title { font-size: 23px; }
  .panel, .hero { padding: 18px; }
  .bottom-nav__label { font-size: 10px; }
  .bottom-nav__item { min-width: 0; flex: 1 1 0; }
  .reader-shell { padding: 14px; }
  .reader-bar { align-items: start; }
  .reader-bar__controls { justify-content: flex-start; }
  .signals-viewport {
    height: calc(100dvh - 246px);
    border-radius: 20px;
  }
  .signal-page__inner {
    min-height: calc(100dvh - 264px);
    padding: 22px;
    border-radius: 20px;
  }
  .signal-page__actions {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
  }
  .signal-headline {
    font-size: clamp(32px, 8vw, 46px);
    max-width: 100%;
  }
  .titles-sheet {
    position: fixed;
    inset: 126px 12px 96px 12px;
    max-height: none;
    overflow-y: auto;
  }
  .titles-backdrop {
    position: fixed;
    inset: 0;
  }
  .experiment-table__head {
    display: none;
  }
  .experiment-row__summary {
    grid-template-columns: 1fr;
  }
  .experiment-row__summary span:last-child {
    display: none;
  }
}