@layer reset, base, components, utilities;

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body,
  h1,
  h2,
  h3,
  h4,
  p,
  dl,
  dd,
  ol,
  ul {
    margin: 0;
  }

  ol,
  ul {
    padding: 0;
  }

  button,
  input {
    font: inherit;
  }

  button,
  a,
  summary {
    -webkit-tap-highlight-color: transparent;
  }

  img,
  svg {
    display: block;
    max-width: 100%;
  }

  [hidden] {
    display: none !important;
  }
}

@layer base {
  :root {
    color-scheme: dark;
    --bg: #08080b;
    --bg-soft: #0c0c11;
    --surface: #111116;
    --surface-raised: #16161c;
    --surface-hover: #1b1a22;
    --ink: #f4f0e9;
    --ink-soft: #cfcbc4;
    --muted: #96929d;
    --muted-strong: #b2adb7;
    --line: rgba(244, 240, 233, 0.11);
    --line-strong: rgba(244, 240, 233, 0.2);
    --violet: #b99bff;
    --violet-soft: #d2c1ff;
    --violet-deep: #7056b6;
    --acid: #dcff78;
    --amber: #ffc56f;
    --red: #ff8e87;
    --green: #78e6ad;
    --serif: Georgia, "Times New Roman", serif;
    --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Consolas, monospace;
    --page: min(1180px, calc(100% - 48px));
    --reading: 72ch;
  }

  html {
    min-width: 320px;
    background: var(--bg);
    scroll-padding-top: 96px;
  }

  body {
    min-width: 320px;
    min-height: 100vh;
    background:
      radial-gradient(circle at 82% 7%, rgba(112, 86, 182, 0.15), transparent 31rem),
      radial-gradient(circle at 8% 38%, rgba(220, 255, 120, 0.035), transparent 28rem),
      var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.58;
    text-rendering: optimizeLegibility;
  }

  body::before {
    position: fixed;
    z-index: -1;
    inset: 0;
    background-image:
      linear-gradient(rgba(255, 255, 255, 0.014) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, 0.012) 1px, transparent 1px);
    background-size: 64px 64px;
    content: "";
    mask-image: linear-gradient(to bottom, black, transparent 88%);
    pointer-events: none;
  }

  ::selection {
    background: var(--violet);
    color: #0a0910;
  }

  :focus-visible {
    outline: 2px solid var(--acid);
    outline-offset: 4px;
  }

  a {
    color: inherit;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.22em;
  }

  code,
  time,
  dd,
  .claim-value,
  .comparison-value {
    font-variant-numeric: tabular-nums;
  }
}

@layer components {
  .page {
    width: var(--page);
    margin-inline: auto;
  }

  .skip-link {
    position: fixed;
    z-index: 100;
    top: 12px;
    left: 12px;
    padding: 0.65rem 1rem;
    transform: translateY(-160%);
    border-radius: 4px;
    background: var(--acid);
    color: #09090c;
    font-weight: 780;
    text-decoration: none;
  }

  .skip-link:focus {
    transform: translateY(0);
  }

  .topbar {
    position: sticky;
    z-index: 20;
    top: 0;
    display: grid;
    width: var(--page);
    min-height: 76px;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    margin: 0 auto;
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg) 86%, transparent);
    backdrop-filter: blur(18px) saturate(125%);
  }

  .brand {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    width: fit-content;
    gap: 0.65rem;
    color: var(--ink);
    font-size: 0.78rem;
    font-weight: 780;
    letter-spacing: 0.17em;
    text-decoration: none;
  }

  .brand-mark {
    position: relative;
    display: grid;
    width: 28px;
    height: 28px;
    flex: 0 0 auto;
    place-items: center;
    transform: rotate(45deg);
    border: 1px solid var(--violet);
  }

  .brand-mark::after {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--acid);
    box-shadow: 0 0 12px rgba(220, 255, 120, 0.55);
    content: "";
  }

  .brand-mark i {
    position: absolute;
    background: rgba(185, 155, 255, 0.5);
  }

  .brand-mark i:first-child {
    width: 1px;
    height: 100%;
  }

  .brand-mark i:last-child {
    width: 100%;
    height: 1px;
  }

  .brand-divider {
    color: var(--muted);
  }

  .brand-depth {
    color: var(--violet-soft);
  }

  .topnav {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2.2vw, 2rem);
  }

  .topnav a,
  .header-link {
    color: var(--muted-strong);
    font-size: 0.75rem;
    font-weight: 680;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition: color 160ms ease;
  }

  .topnav a:hover,
  .header-link:hover {
    color: var(--ink);
  }

  .header-link {
    justify-self: end;
    color: var(--violet-soft);
    white-space: nowrap;
  }

  .button {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    border: 1px solid transparent;
    border-radius: 4px;
    padding: 0.7rem 1rem;
    cursor: pointer;
    font-size: 0.76rem;
    font-weight: 760;
    letter-spacing: 0.035em;
    text-align: center;
    text-decoration: none;
    transition:
      background 160ms ease,
      border-color 160ms ease,
      color 160ms ease;
  }

  .button:disabled {
    cursor: wait;
    opacity: 0.62;
  }

  .button-primary {
    background: var(--violet);
    color: #0d0b12;
  }

  .button-primary:hover:not(:disabled) {
    background: var(--violet-soft);
  }

  .button-ghost {
    border-color: var(--line-strong);
    background: rgba(255, 255, 255, 0.02);
    color: var(--ink);
  }

  .button-ghost:hover:not(:disabled) {
    border-color: rgba(185, 155, 255, 0.55);
    background: rgba(185, 155, 255, 0.06);
  }

  .eyebrow,
  .card-kicker {
    color: var(--muted-strong);
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .eyebrow b {
    margin-right: 0.7rem;
    color: var(--acid);
    font-weight: 500;
  }

  .eyebrow.amber {
    color: var(--amber);
  }

  .eyebrow.red {
    color: var(--red);
  }

  .briefing {
    min-width: 0;
    padding: 3rem 0 1rem;
  }

  .briefing-header {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
    gap: 1rem;
  }

  .briefing-title-block,
  .briefing-thesis,
  .signal-board,
  .attention-console {
    min-width: 0;
    border: 1px solid var(--line-strong);
    background: var(--surface);
  }

  .briefing-title-block {
    padding: clamp(1.3rem, 3vw, 2rem);
    background:
      radial-gradient(circle at 4% 0, rgba(220, 255, 120, 0.045), transparent 38%),
      var(--surface);
  }

  .briefing h1 {
    max-width: 760px;
    margin: 0.85rem 0 0.7rem;
    overflow-wrap: anywhere;
    font-family: var(--serif);
    font-size: clamp(3.35rem, 5.6vw, 5.2rem);
    font-weight: 400;
    letter-spacing: -0.055em;
    line-height: 0.92;
  }

  .briefing-subtitle {
    max-width: 670px;
    color: var(--ink-soft);
    font-family: var(--serif);
    font-size: clamp(0.95rem, 1.4vw, 1.14rem);
    line-height: 1.5;
  }

  .briefing-meta {
    display: grid;
    grid-template-columns: 1.15fr 1.6fr 0.65fr 0.65fr;
    gap: 0;
    margin-top: 1.35rem;
    border-top: 1px solid var(--line);
  }

  .briefing-meta > div {
    min-width: 0;
    padding: 0.75rem 0.7rem 0 0;
  }

  .briefing-meta dt {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .briefing-meta dd {
    margin-top: 0.15rem;
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.68rem;
  }

  .briefing-thesis {
    position: relative;
    padding: clamp(1.3rem, 3vw, 2rem);
    background:
      radial-gradient(circle at 95% 0, rgba(185, 155, 255, 0.14), transparent 54%),
      var(--surface-raised);
  }

  .briefing-thesis::before {
    position: absolute;
    top: -1px;
    left: -1px;
    width: 45%;
    height: 2px;
    background: linear-gradient(90deg, var(--violet), transparent);
    content: "";
  }

  .briefing-thesis h2 {
    margin: 0.55rem 0 0.6rem;
    font-family: var(--serif);
    font-size: clamp(1.4rem, 2.2vw, 2rem);
    font-weight: 400;
    letter-spacing: -0.035em;
    line-height: 1.05;
  }

  .briefing-thesis > p {
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-family: var(--serif);
    font-size: 0.92rem;
    line-height: 1.52;
  }

  .briefing-thesis-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.7rem;
  }

  .confidence-label {
    display: inline-flex;
    min-height: 27px;
    align-items: center;
    border: 1px solid rgba(185, 155, 255, 0.3);
    border-radius: 99px;
    padding: 0.2rem 0.55rem;
    color: var(--violet-soft);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.045em;
    text-transform: uppercase;
  }

  .briefing-thesis > a {
    display: inline-flex;
    margin-top: 0.8rem;
    color: var(--violet-soft);
    font-family: var(--mono);
    font-size: 0.65rem;
  }

  .briefing-core {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(340px, 0.8fr);
    align-items: start;
    gap: 1rem;
    margin-top: 1rem;
  }

  .signal-board,
  .attention-console {
    padding: clamp(1.15rem, 2.2vw, 1.6rem);
  }

  .briefing-section-head {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(240px, 1.1fr);
    align-items: end;
    gap: 1.2rem;
  }

  .briefing-section-head h2,
  .attention-console h2 {
    margin-top: 0.35rem;
    font-family: var(--serif);
    font-size: clamp(1.35rem, 2.2vw, 1.95rem);
    font-weight: 400;
    letter-spacing: -0.035em;
    line-height: 1.05;
  }

  .briefing-section-head > p {
    color: var(--muted-strong);
    font-size: 0.7rem;
    line-height: 1.55;
  }

  .signal-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 1.1rem;
    border: 1px solid var(--line);
  }

  .signal-card {
    display: flex;
    min-width: 0;
    min-height: 145px;
    flex-direction: column;
    border-right: 1px solid var(--line);
    padding: 0.9rem;
    background: rgba(255, 255, 255, 0.012);
    text-decoration: none;
    transition:
      opacity 160ms ease,
      background 160ms ease,
      border-color 160ms ease;
  }

  .signal-card:last-child {
    border-right: 0;
  }

  .signal-card:hover {
    background: rgba(185, 155, 255, 0.055);
  }

  .signal-label {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
  }

  .signal-card strong {
    margin: auto 0 0.45rem;
    overflow-wrap: anywhere;
    color: var(--ink);
    font-family: var(--serif);
    font-size: clamp(1.2rem, 1.8vw, 1.65rem);
    font-weight: 400;
    letter-spacing: -0.035em;
    line-height: 1;
  }

  .signal-caption {
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-size: 0.62rem;
    line-height: 1.35;
  }

  .signal-meta {
    margin-top: 0.5rem;
    overflow-wrap: anywhere;
    color: var(--acid);
    font-family: var(--mono);
    font-size: 0.53rem;
    line-height: 1.35;
    text-transform: uppercase;
  }

  .signal-placeholder {
    color: var(--muted);
  }

  .attention-console {
    background:
      radial-gradient(circle at 100% 100%, rgba(220, 255, 120, 0.035), transparent 46%),
      var(--surface);
  }

  .lens-controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
    margin-top: 0.9rem;
  }

  .lens-controls button {
    min-width: 0;
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 3px;
    padding: 0.5rem 0.45rem;
    cursor: pointer;
    overflow-wrap: anywhere;
    background: rgba(255, 255, 255, 0.015);
    color: var(--muted-strong);
    font-family: var(--mono);
    font-size: 0.61rem;
    text-transform: uppercase;
  }

  .lens-controls button[aria-pressed="true"] {
    border-color: rgba(220, 255, 120, 0.58);
    background: rgba(220, 255, 120, 0.09);
    color: var(--acid);
    box-shadow: inset 0 -2px 0 var(--acid);
  }

  .lens-controls button:disabled {
    cursor: wait;
    opacity: 0.5;
  }

  .lens-description {
    min-height: 3.1em;
    margin-top: 0.8rem;
    color: var(--muted-strong);
    font-size: 0.68rem;
    line-height: 1.5;
  }

  .lens-focus-list {
    display: grid;
    gap: 0;
    margin-top: 0.7rem;
    border-top: 1px solid var(--line);
    list-style: none;
  }

  .lens-focus-item {
    min-width: 0;
    border-bottom: 1px solid var(--line);
  }

  .lens-focus-item a {
    display: grid;
    min-width: 0;
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 0 0.7rem;
    padding: 0.65rem 0.25rem;
    text-decoration: none;
  }

  .lens-focus-role {
    grid-row: 1 / span 2;
    color: var(--violet-soft);
    font-family: var(--mono);
    font-size: 0.55rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .lens-focus-item p {
    min-width: 0;
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-family: var(--serif);
    font-size: 0.72rem;
    line-height: 1.35;
  }

  .lens-focus-item small {
    margin-top: 0.22rem;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.5rem;
    text-transform: uppercase;
  }

  .lens-focus-item a:hover p {
    color: var(--ink);
  }

  .lens-evidence-link {
    display: inline-flex;
    margin-top: 0.8rem;
    color: var(--acid);
    font-family: var(--mono);
    font-size: 0.62rem;
  }

  .causal-rail {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    margin-top: 1rem;
    border: 1px solid var(--line-strong);
    list-style: none;
  }

  .causal-rail li {
    position: relative;
    display: flex;
    min-width: 0;
    min-height: 62px;
    flex-direction: column;
    justify-content: center;
    border-right: 1px solid var(--line);
    padding: 0.65rem 0.8rem;
  }

  .causal-rail li:last-child {
    border-right: 0;
  }

  .causal-rail li:not(:last-child)::after {
    position: absolute;
    z-index: 1;
    top: 50%;
    right: -0.42rem;
    width: 0.85rem;
    transform: translateY(-50%);
    background: var(--bg);
    color: var(--violet);
    content: "→";
    font-size: 0.68rem;
    text-align: center;
  }

  .causal-rail span {
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-family: var(--serif);
    font-size: 0.84rem;
  }

  .causal-rail small {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.52rem;
  }

  .briefing-trust {
    display: grid;
    min-width: 0;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    border: 1px solid rgba(255, 197, 111, 0.25);
    padding: 0.7rem 0.85rem;
    background: rgba(255, 197, 111, 0.035);
  }

  .briefing-trust p {
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-size: 0.67rem;
  }

  .briefing-trust code {
    max-width: 190px;
    overflow: hidden;
    color: var(--amber);
    font-family: var(--mono);
    font-size: 0.58rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  body:not([data-active-lens="overview"]) .claim-card[data-lens-match="false"],
  body:not([data-active-lens="overview"]) .signal-card[data-lens-match="false"] {
    opacity: 0.34;
  }

  body:not([data-active-lens="overview"]) .claim-card[data-lens-match="true"] {
    border-color: rgba(185, 155, 255, 0.52);
    box-shadow: inset 3px 0 0 var(--violet);
  }

  body:not([data-active-lens="overview"]) .signal-card[data-lens-match="true"] {
    background: rgba(185, 155, 255, 0.07);
  }

  .boundary-section {
    padding-top: 2.5rem;
  }

  .boundary-disclosure {
    border: 1px solid var(--line-strong);
    background: var(--surface);
  }

  .boundary-disclosure > summary {
    display: flex;
    min-height: 68px;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem 1.2rem;
    cursor: pointer;
    list-style: none;
  }

  .boundary-disclosure > summary::-webkit-details-marker {
    display: none;
  }

  .boundary-disclosure > summary::after {
    color: var(--violet-soft);
    content: "+";
    font-family: var(--mono);
  }

  .boundary-disclosure[open] > summary::after {
    content: "−";
  }

  .boundary-disclosure > summary span {
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .boundary-disclosure > summary b {
    margin-right: 0.7rem;
    color: var(--acid);
    font-weight: 500;
  }

  .boundary-disclosure > summary small {
    margin-left: auto;
    color: var(--muted);
    font-size: 0.63rem;
  }

  .boundary-content {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 2rem;
    border-top: 1px solid var(--line);
    padding: clamp(1.2rem, 3vw, 2rem);
  }

  .boundary-content h2 {
    margin: 0.45rem 0 0.7rem;
    font-family: var(--serif);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 400;
    letter-spacing: -0.035em;
  }

  .boundary-content p {
    color: var(--muted-strong);
    font-size: 0.76rem;
  }

  .interpretation-notice {
    margin-top: 1rem;
    border-left: 2px solid var(--violet);
    padding-left: 0.9rem;
  }

  .boundary-walls {
    min-width: 0;
    border-left: 1px solid var(--line);
    padding-left: 2rem;
  }

  .boundary-walls ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 0.6rem;
    list-style: none;
  }

  .boundary-walls li {
    position: relative;
    min-width: 0;
    border-top: 1px solid var(--line);
    padding: 0.7rem 0.7rem 0.7rem 1rem;
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-size: 0.67rem;
  }

  .boundary-walls li::before {
    position: absolute;
    top: 1.02rem;
    left: 0.1rem;
    width: 5px;
    height: 5px;
    transform: rotate(45deg);
    background: var(--violet);
    content: "";
  }

  .hero {
    display: grid;
    min-height: 690px;
    grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.7fr);
    align-items: center;
    gap: clamp(3rem, 8vw, 8rem);
    padding: 6.5rem 0 5.5rem;
  }

  .hero-copy,
  .thesis-card,
  .section-heading,
  .method-copy {
    min-width: 0;
  }

  .hero-kicker {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.9rem 1.2rem;
  }

  .status-pill {
    display: inline-flex;
    min-height: 30px;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--line);
    border-radius: 99px;
    padding: 0.25rem 0.65rem;
    color: var(--muted-strong);
    font-family: var(--mono);
    font-size: 0.64rem;
    letter-spacing: 0.035em;
    text-transform: uppercase;
  }

  .status-pill i {
    width: 7px;
    height: 7px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: var(--amber);
    box-shadow: 0 0 0 4px rgba(255, 197, 111, 0.08);
  }

  .status-pill[data-state="ready"] i {
    background: var(--green);
    box-shadow: 0 0 0 4px rgba(120, 230, 173, 0.08);
  }

  .status-pill[data-state="error"] i {
    background: var(--red);
    box-shadow: 0 0 0 4px rgba(255, 142, 135, 0.08);
  }

  .hero h1,
  .section-heading h2,
  .method-copy h2 {
    font-family: var(--serif);
    font-weight: 400;
    letter-spacing: -0.052em;
  }

  .hero h1 {
    max-width: 860px;
    margin: 1.2rem 0 1.5rem;
    overflow-wrap: anywhere;
    font-size: clamp(4.4rem, 8.3vw, 7.7rem);
    line-height: 0.91;
  }

  .hero-subtitle {
    max-width: 650px;
    color: var(--ink-soft);
    font-family: var(--serif);
    font-size: clamp(1.12rem, 1.7vw, 1.42rem);
    line-height: 1.5;
  }

  .hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2.2rem;
    margin-top: 2rem;
  }

  .hero-meta p {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
  }

  .hero-meta span {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.64rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .hero-meta time {
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.75rem;
  }

  .thesis-card {
    position: relative;
    padding: clamp(1.5rem, 4vw, 2.8rem);
    border: 1px solid var(--line-strong);
    background:
      radial-gradient(circle at 90% 0, rgba(185, 155, 255, 0.13), transparent 48%),
      var(--surface);
    box-shadow: 0 28px 90px rgba(0, 0, 0, 0.3);
  }

  .thesis-card::before {
    position: absolute;
    top: -1px;
    left: -1px;
    width: 42%;
    height: 2px;
    background: linear-gradient(90deg, var(--violet), transparent);
    content: "";
  }

  .thesis-card h2 {
    margin: 0.75rem 0 1.2rem;
    font-family: var(--serif);
    font-size: clamp(1.65rem, 3vw, 2.35rem);
    font-weight: 400;
    letter-spacing: -0.035em;
    line-height: 1.08;
  }

  .thesis-card > p:not(.thesis-note) {
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-family: var(--serif);
    font-size: 1.05rem;
    line-height: 1.65;
  }

  .thesis-note {
    margin-top: 1.5rem;
    border-top: 1px solid var(--line);
    padding-top: 1rem;
    color: var(--muted);
    font-size: 0.74rem;
  }

  .causal-section {
    padding: 2rem 0 3.5rem;
  }

  .section-heading {
    max-width: 670px;
  }

  .section-heading h2,
  .method-copy h2 {
    margin: 0.85rem 0 1rem;
    font-size: clamp(3rem, 5.5vw, 5.4rem);
    line-height: 0.96;
  }

  .section-heading > p,
  .horizontal-heading > p,
  .method-copy > p {
    max-width: var(--reading);
    color: var(--muted-strong);
    font-family: var(--serif);
    font-size: 1.04rem;
    line-height: 1.65;
  }

  .compact-heading {
    max-width: 780px;
  }

  .compact-heading h2 {
    font-size: clamp(2.7rem, 4.7vw, 4.5rem);
  }

  .horizontal-heading {
    display: grid;
    max-width: none;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 440px);
    align-items: end;
    gap: 2.5rem;
  }

  .causal-chain {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    margin-top: 3rem;
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
    list-style: none;
  }

  .causal-chain li {
    position: relative;
    display: flex;
    min-width: 0;
    min-height: 155px;
    flex-direction: column;
    justify-content: center;
    border-right: 1px solid var(--line);
    padding: 1rem;
  }

  .causal-chain li:last-child {
    border-right: 0;
  }

  .causal-chain li::after {
    position: absolute;
    z-index: 1;
    top: 50%;
    right: -0.55rem;
    display: grid;
    width: 1.1rem;
    height: 1.1rem;
    place-items: center;
    transform: translateY(-50%);
    background: var(--bg);
    color: var(--violet);
    content: "→";
    font-size: 0.8rem;
  }

  .causal-chain li:last-child::after {
    display: none;
  }

  .causal-chain span {
    color: var(--acid);
    font-family: var(--mono);
    font-size: 0.64rem;
  }

  .causal-chain strong {
    margin: 0.7rem 0 0.25rem;
    overflow-wrap: anywhere;
    font-family: var(--serif);
    font-size: 1.14rem;
    font-weight: 500;
  }

  .causal-chain small {
    color: var(--muted);
    font-size: 0.7rem;
    line-height: 1.45;
  }

  .trust-banner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 1.2rem;
    margin-top: 2rem;
    border: 1px solid rgba(255, 197, 111, 0.27);
    padding: 1.3rem 1.45rem;
    background: linear-gradient(90deg, rgba(255, 197, 111, 0.075), rgba(255, 197, 111, 0.02));
  }

  .trust-mark {
    display: grid;
    width: 40px;
    height: 40px;
    place-items: center;
    border: 1px solid rgba(255, 197, 111, 0.5);
    border-radius: 50%;
    color: var(--amber);
    font-family: var(--serif);
    font-style: italic;
  }

  .trust-banner h2 {
    margin: 0.12rem 0 0.2rem;
    font-family: var(--serif);
    font-size: 1.16rem;
    font-weight: 500;
  }

  .trust-banner p {
    max-width: 820px;
    color: var(--muted-strong);
    font-size: 0.77rem;
  }

  .trust-banner code {
    max-width: 180px;
    overflow: hidden;
    color: var(--amber);
    font-family: var(--mono);
    font-size: 0.66rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .load-panel,
  .error-panel {
    display: grid;
    min-height: 300px;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 2rem;
    margin-top: 4rem;
    border: 1px solid var(--line-strong);
    padding: clamp(1.5rem, 5vw, 4rem);
    background: var(--surface);
  }

  .load-panel h2,
  .error-panel h2 {
    margin: 0.5rem 0;
    font-family: var(--serif);
    font-size: clamp(2rem, 4vw, 3.4rem);
    font-weight: 400;
    letter-spacing: -0.04em;
  }

  .load-panel p,
  .error-panel p {
    max-width: 620px;
    color: var(--muted-strong);
  }

  .loading-symbol {
    position: relative;
    width: 78px;
    height: 78px;
    transform: rotate(45deg);
    border: 1px solid rgba(185, 155, 255, 0.45);
  }

  .loading-symbol::after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    animation: breathe 1.5s ease-in-out infinite;
    background: var(--acid);
    box-shadow: 0 0 18px rgba(220, 255, 120, 0.65);
    content: "";
  }

  .loading-symbol i {
    position: absolute;
    background: rgba(185, 155, 255, 0.35);
  }

  .loading-symbol i:first-child {
    top: 0;
    left: 50%;
    width: 1px;
    height: 100%;
  }

  .loading-symbol i:last-child {
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
  }

  .error-panel {
    border-color: rgba(255, 142, 135, 0.3);
    background: linear-gradient(90deg, rgba(255, 142, 135, 0.055), var(--surface));
  }

  .error-glyph {
    display: grid;
    width: 70px;
    height: 70px;
    place-items: center;
    border: 1px solid rgba(255, 142, 135, 0.42);
    color: var(--red);
    font-family: var(--serif);
    font-size: 1.5rem;
  }

  .error-actions,
  .method-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: 1.5rem;
  }

  .orientation,
  .analysis-section,
  .disagreement-section,
  .evidence-section,
  .falsifier-section,
  .method-section {
    padding: 6rem 0 1rem;
  }

  .orientation {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
    gap: 4.5rem;
  }

  .dossier-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 1px solid var(--line-strong);
    border-left: 1px solid var(--line-strong);
  }

  .dossier-stats > div {
    display: flex;
    min-height: 112px;
    flex-direction: column;
    justify-content: center;
    gap: 0.4rem;
    border-right: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
    padding: 1rem 1.2rem;
    background: rgba(255, 255, 255, 0.012);
  }

  .dossier-stats dt {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .dossier-stats dd {
    overflow-wrap: anywhere;
    font-family: var(--mono);
    font-size: 1.05rem;
  }

  .walls-card {
    grid-column: 1 / -1;
    border: 1px solid var(--line-strong);
    padding: clamp(1.5rem, 4vw, 2.5rem);
    background:
      radial-gradient(circle at 100% 0, rgba(185, 155, 255, 0.1), transparent 36%),
      var(--surface);
  }

  .walls-card h3 {
    margin: 0.55rem 0 1.4rem;
    font-family: var(--serif);
    font-size: clamp(1.7rem, 3vw, 2.5rem);
    font-weight: 400;
    letter-spacing: -0.03em;
  }

  .walls-card ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    list-style: none;
  }

  .walls-card li {
    position: relative;
    min-width: 0;
    border-top: 1px solid var(--line);
    padding: 1rem 1rem 1rem 1.6rem;
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-size: 0.82rem;
  }

  .walls-card li::before {
    position: absolute;
    top: 1.35rem;
    left: 0.2rem;
    width: 6px;
    height: 6px;
    transform: rotate(45deg);
    background: var(--violet);
    content: "";
  }

  .chapters {
    display: grid;
    gap: 2rem;
    margin-top: 4rem;
  }

  .chapter {
    display: grid;
    grid-template-columns: minmax(210px, 0.42fr) minmax(0, 1fr);
    gap: clamp(1.5rem, 5vw, 4.5rem);
    border-top: 1px solid var(--line-strong);
    padding-top: 2rem;
  }

  .chapter-heading {
    min-width: 0;
  }

  .chapter-number {
    color: var(--acid);
    font-family: var(--mono);
    font-size: 0.65rem;
  }

  .chapter-heading h3 {
    margin: 0.65rem 0 0.8rem;
    overflow-wrap: anywhere;
    font-family: var(--serif);
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    font-weight: 400;
    letter-spacing: -0.035em;
    line-height: 1.06;
  }

  .chapter-heading p {
    color: var(--muted-strong);
    font-family: var(--serif);
    font-size: 0.96rem;
  }

  .claim-stack {
    display: grid;
    min-width: 0;
    gap: 1rem;
  }

  .claim-card {
    min-width: 0;
    border: 1px solid var(--line-strong);
    background: var(--surface);
  }

  .claim-card:target {
    border-color: var(--violet);
    box-shadow: 0 0 0 3px rgba(185, 155, 255, 0.08);
  }

  .claim-card-main {
    padding: clamp(1.25rem, 3vw, 2rem);
  }

  .claim-card-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem;
  }

  .claim-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
  }

  .claim-kind,
  .evidence-state,
  .tag,
  .source-kind {
    display: inline-flex;
    min-height: 27px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 99px;
    padding: 0.2rem 0.55rem;
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.045em;
    text-transform: uppercase;
  }

  .claim-kind[data-kind*="observ"] {
    border-color: rgba(120, 230, 173, 0.3);
    color: var(--green);
  }

  .claim-kind[data-kind*="deriv"] {
    border-color: rgba(220, 255, 120, 0.3);
    color: var(--acid);
  }

  .claim-kind[data-kind*="infer"],
  .claim-kind[data-kind*="interpret"] {
    border-color: rgba(185, 155, 255, 0.34);
    color: var(--violet-soft);
  }

  .claim-id {
    max-width: 25ch;
    overflow: hidden;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.65rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .claim-statement {
    max-width: var(--reading);
    margin-top: 1.25rem;
    overflow-wrap: anywhere;
    font-family: var(--serif);
    font-size: clamp(1.2rem, 2vw, 1.55rem);
    line-height: 1.48;
  }

  .claim-value,
  .comparison-value {
    margin-top: 1.2rem;
    overflow-wrap: anywhere;
    color: var(--violet-soft);
    font-family: var(--mono);
    font-size: clamp(1.25rem, 2.5vw, 1.8rem);
  }

  .claim-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
    margin-top: 1.4rem;
    border-top: 1px solid var(--line);
    padding-top: 1rem;
  }

  .claim-meta > div,
  .source-meta > div {
    min-width: 0;
  }

  .claim-meta dt,
  .source-meta dt {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.61rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
  }

  .claim-meta dd,
  .source-meta dd {
    margin-top: 0.2rem;
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.69rem;
  }

  .claim-sources {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.4rem 0.7rem;
    margin-top: 1rem;
    color: var(--muted);
    font-size: 0.7rem;
  }

  .claim-sources > span {
    font-family: var(--mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }

  .claim-sources a {
    color: var(--violet-soft);
  }

  .claim-trace {
    border-top: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.13);
  }

  .claim-trace summary,
  .source-limitations summary {
    display: flex;
    min-height: 48px;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1.25rem;
    cursor: pointer;
    color: var(--violet-soft);
    font-family: var(--mono);
    font-size: 0.69rem;
    list-style: none;
  }

  .claim-trace summary::-webkit-details-marker,
  .source-limitations summary::-webkit-details-marker {
    display: none;
  }

  .claim-trace summary::after,
  .source-limitations summary::after {
    color: var(--muted);
    content: "+";
    font-size: 1rem;
  }

  .claim-trace[open] summary::after,
  .source-limitations[open] summary::after {
    content: "−";
  }

  .trace-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--line);
  }

  .trace-block {
    min-width: 0;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 1.2rem;
  }

  .trace-block:nth-child(2n) {
    border-right: 0;
  }

  .trace-block h4 {
    margin-bottom: 0.55rem;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.64rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .trace-block p,
  .trace-block li {
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-size: 0.76rem;
  }

  .trace-block ul {
    display: grid;
    gap: 0.45rem;
    padding-left: 1rem;
  }

  .trace-block code {
    display: block;
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-size: 0.66rem;
    word-break: break-all;
  }

  .trace-block a,
  .claim-reference {
    color: var(--violet-soft);
  }

  .calculation-block {
    grid-column: 1 / -1;
  }

  .calculation-expression {
    display: block;
    margin-top: 0.75rem;
    border: 1px solid var(--line);
    padding: 0.85rem;
    overflow-x: auto;
    color: var(--acid);
    background: rgba(220, 255, 120, 0.025);
    white-space: nowrap;
  }

  .calculation-meta {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.6rem;
    margin-top: 0.85rem;
  }

  .calculation-meta dt {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .calculation-meta dd {
    margin-top: 0.2rem;
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-family: var(--mono);
    font-size: 0.7rem;
  }

  .calculation-inputs {
    margin-top: 0.85rem;
  }

  .recompute-action {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem;
    margin-top: 1rem;
  }

  .recompute-result {
    margin: 0;
    color: var(--muted-strong);
    font-family: var(--mono);
    font-size: 0.68rem;
  }

  .recompute-result[data-state="match"] {
    color: var(--green);
  }

  .recompute-result[data-state="mismatch"],
  .recompute-result[data-state="error"] {
    color: var(--red);
  }

  .claim-reference {
    display: block;
    border: 1px dashed var(--line-strong);
    padding: 0.9rem 1rem;
    overflow-wrap: anywhere;
    font-size: 0.76rem;
  }

  .empty-note {
    border: 1px dashed var(--line-strong);
    padding: 1rem;
    color: var(--muted);
    font-size: 0.78rem;
  }

  .comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 3.5rem;
  }

  .comparison-card {
    display: flex;
    min-width: 0;
    min-height: 310px;
    flex-direction: column;
    border: 1px solid var(--line-strong);
    padding: clamp(1.3rem, 3vw, 2rem);
    background: var(--surface);
  }

  .comparison-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.64rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .comparison-card h3 {
    margin: 1rem 0 0.7rem;
    overflow-wrap: anywhere;
    font-family: var(--serif);
    font-size: clamp(1.3rem, 2.4vw, 1.8rem);
    font-weight: 400;
    line-height: 1.35;
  }

  .comparison-card > p:not(.comparison-value) {
    margin-top: auto;
    border-top: 1px solid var(--line);
    padding-top: 1rem;
    color: var(--muted-strong);
    font-size: 0.75rem;
  }

  .comparison-card a {
    color: var(--violet-soft);
  }

  .comparison-missing {
    justify-content: center;
    border-style: dashed;
    color: var(--muted);
  }

  .source-ledger {
    display: grid;
    margin-top: 3.5rem;
    border-top: 1px solid var(--line-strong);
    list-style: none;
  }

  .source-entry {
    display: grid;
    min-width: 0;
    grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
    gap: clamp(1.5rem, 4vw, 4rem);
    border-bottom: 1px solid var(--line-strong);
    padding: 1.8rem 0;
  }

  .source-entry:target {
    background: rgba(185, 155, 255, 0.035);
  }

  .source-title-row {
    display: flex;
    min-width: 0;
    align-items: flex-start;
    gap: 0.9rem;
  }

  .source-index {
    flex: 0 0 auto;
    color: var(--acid);
    font-family: var(--mono);
    font-size: 0.64rem;
  }

  .source-title-row h3 {
    overflow-wrap: anywhere;
    font-family: var(--serif);
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 1.35;
  }

  .source-title-row h3 a {
    color: var(--ink);
    text-decoration-color: rgba(185, 155, 255, 0.55);
  }

  .source-publisher {
    margin-top: 0.45rem;
    color: var(--muted-strong);
    font-size: 0.74rem;
  }

  .source-body {
    min-width: 0;
  }

  .source-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }

  .source-usage,
  .source-coverage {
    margin-top: 1rem;
    overflow-wrap: anywhere;
    color: var(--muted-strong);
    font-size: 0.76rem;
  }

  .source-usage span,
  .source-coverage span {
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .source-limitations {
    margin-top: 0.8rem;
    border: 1px solid var(--line);
  }

  .source-limitations ul {
    display: grid;
    gap: 0.45rem;
    border-top: 1px solid var(--line);
    padding: 1rem 1rem 1rem 2rem;
    color: var(--muted-strong);
    font-size: 0.74rem;
  }

  .falsifier-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 3.5rem;
  }

  .falsifier-card {
    min-width: 0;
    border-left: 2px solid var(--amber);
    padding: 1.15rem 1.25rem;
    background: rgba(255, 197, 111, 0.045);
  }

  .falsifier-card a,
  .falsifier-card span {
    color: var(--amber);
    font-family: var(--mono);
    font-size: 0.63rem;
  }

  .falsifier-card p {
    margin-top: 0.6rem;
    overflow-wrap: anywhere;
    color: var(--ink-soft);
    font-family: var(--serif);
    font-size: 1rem;
    line-height: 1.55;
  }

  .method-section {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.62fr);
    gap: clamp(3rem, 8vw, 7rem);
    padding-bottom: 8rem;
  }

  .claim-legend {
    border-top: 1px solid var(--line-strong);
  }

  .claim-legend > div {
    display: grid;
    grid-template-columns: minmax(90px, 0.35fr) minmax(0, 1fr);
    gap: 1rem;
    border-bottom: 1px solid var(--line);
    padding: 1rem 0;
  }

  .claim-legend dt {
    color: var(--violet-soft);
    font-family: var(--mono);
    font-size: 0.68rem;
    text-transform: uppercase;
  }

  .claim-legend dd {
    color: var(--muted-strong);
    font-size: 0.76rem;
  }

  .footer {
    display: grid;
    min-height: 130px;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.69rem;
  }

  .footer-brand {
    transform: scale(0.86);
    transform-origin: left center;
  }

  .footer p {
    font-family: var(--serif);
    font-size: 0.82rem;
  }

  .footer > div {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
  }

  .load-panel {
    min-height: 108px;
    gap: 1rem;
    margin-top: 1rem;
    padding: 1rem 1.2rem;
  }

  .load-panel .loading-symbol {
    width: 44px;
    height: 44px;
  }

  .load-panel h2 {
    margin: 0.15rem 0;
    font-size: 1.35rem;
  }

  .load-panel p {
    font-size: 0.72rem;
  }

  .noscript-notice {
    position: fixed;
    z-index: 80;
    right: 1rem;
    bottom: 1rem;
    left: 1rem;
    border: 1px solid var(--amber);
    padding: 1rem;
    background: #1a1611;
    color: var(--ink);
    font-size: 0.8rem;
    text-align: center;
  }

  @keyframes breathe {
    0%,
    100% {
      opacity: 0.45;
    }
    50% {
      opacity: 1;
    }
  }
}

@layer utilities {
  @media (max-width: 980px) {
    :root {
      --page: min(100% - 36px, 900px);
    }

    .topbar {
      grid-template-columns: 1fr auto;
    }

    .topnav {
      display: none;
    }

    .hero {
      min-height: auto;
      grid-template-columns: minmax(0, 1fr) minmax(300px, 0.7fr);
      gap: 2.5rem;
      padding-top: 5rem;
    }

    .hero h1 {
      font-size: clamp(4rem, 9.5vw, 6.4rem);
    }

    .causal-chain {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .causal-chain li:nth-child(3) {
      border-right: 0;
    }

    .causal-chain li:nth-child(-n + 3) {
      border-bottom: 1px solid var(--line);
    }

    .causal-chain li:nth-child(3)::after {
      display: none;
    }

    .orientation {
      gap: 2.5rem;
    }
  }

  @media (max-width: 760px) {
    :root {
      --page: calc(100% - 30px);
    }

    .hero {
      grid-template-columns: 1fr;
      padding: 4.5rem 0 3.5rem;
    }

    .briefing {
      padding-top: 2rem;
    }

    .briefing-header,
    .briefing-core,
    .boundary-content {
      grid-template-columns: 1fr;
    }

    .briefing h1 {
      font-size: clamp(3rem, 10vw, 4.7rem);
    }

    .briefing-section-head {
      grid-template-columns: minmax(0, 0.8fr) minmax(220px, 1.2fr);
    }

    .causal-rail {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .causal-rail li:nth-child(3) {
      border-right: 0;
    }

    .causal-rail li:nth-child(-n + 3) {
      border-bottom: 1px solid var(--line);
    }

    .causal-rail li:nth-child(3)::after {
      display: none;
    }

    .boundary-walls {
      border-top: 1px solid var(--line);
      border-left: 0;
      padding-top: 1.2rem;
      padding-left: 0;
    }

    .thesis-card {
      max-width: 620px;
    }

    .horizontal-heading,
    .orientation,
    .method-section {
      grid-template-columns: 1fr;
    }

    .horizontal-heading {
      gap: 0.4rem;
    }

    .orientation,
    .analysis-section,
    .disagreement-section,
    .evidence-section,
    .falsifier-section,
    .method-section {
      padding-top: 6.5rem;
    }

    .trust-banner {
      grid-template-columns: auto 1fr;
    }

    .trust-banner code {
      grid-column: 2;
      max-width: 100%;
    }

    .walls-card ul,
    .comparison-grid,
    .falsifier-list {
      grid-template-columns: 1fr;
    }

    .chapter,
    .source-entry {
      grid-template-columns: 1fr;
      gap: 1.3rem;
    }

    .chapter-heading {
      max-width: 650px;
    }

    .method-section {
      gap: 3rem;
    }

    .footer {
      grid-template-columns: 1fr auto;
    }

    .footer p {
      display: none;
    }
  }

  @media (max-width: 520px) {
    :root {
      --page: calc(100% - 24px);
    }

    html {
      scroll-padding-top: 78px;
    }

    .topbar {
      min-height: 66px;
      gap: 0.7rem;
    }

    .brand {
      gap: 0.45rem;
      font-size: 0.66rem;
      letter-spacing: 0.12em;
    }

    .brand-mark {
      width: 23px;
      height: 23px;
    }

    .brand-divider {
      display: none;
    }

    .header-link {
      min-height: 40px;
      display: inline-flex;
      align-items: center;
      border: 1px solid var(--line);
      padding: 0.35rem 0.6rem;
      font-size: 0.65rem;
    }

    .hero {
      padding-top: 3.8rem;
    }

    .briefing {
      padding-top: 1.2rem;
    }

    .briefing-title-block,
    .briefing-thesis,
    .signal-board,
    .attention-console {
      padding: 1rem;
    }

    .briefing h1 {
      margin-top: 0.75rem;
      font-size: clamp(2.55rem, 13vw, 3.65rem);
      line-height: 0.94;
    }

    .briefing-meta {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      row-gap: 0.45rem;
    }

    .briefing-section-head {
      grid-template-columns: 1fr;
      gap: 0.5rem;
    }

    .briefing-section-head > p {
      max-height: none;
    }

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

    .signal-card {
      min-height: 132px;
      border-bottom: 1px solid var(--line);
    }

    .signal-card:nth-child(2) {
      border-right: 0;
    }

    .signal-card:nth-child(n + 3) {
      border-bottom: 0;
    }

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

    .lens-focus-list {
      max-height: none;
    }

    .lens-focus-item a {
      grid-template-columns: 68px minmax(0, 1fr);
    }

    .causal-rail span {
      font-size: 0.74rem;
    }

    .briefing-trust {
      grid-template-columns: 1fr;
      gap: 0.35rem;
    }

    .briefing-trust code {
      max-width: 100%;
    }

    .boundary-disclosure > summary {
      align-items: flex-start;
    }

    .boundary-disclosure > summary small {
      display: none;
    }

    .boundary-walls ul {
      grid-template-columns: 1fr;
    }

    .hero h1 {
      margin-top: 1rem;
      font-size: clamp(2.8rem, 15vw, 4.4rem);
      line-height: 0.96;
    }

    .hero-subtitle {
      font-size: 1.04rem;
    }

    .hero-meta {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1rem;
    }

    .causal-section {
      padding-top: 1rem;
    }

    .section-heading h2,
    .method-copy h2,
    .compact-heading h2 {
      font-size: clamp(2.5rem, 13vw, 3.6rem);
    }

    .causal-chain {
      grid-template-columns: 1fr;
    }

    .causal-chain li,
    .causal-chain li:nth-child(-n + 3) {
      min-height: 108px;
      border-right: 0;
      border-bottom: 1px solid var(--line);
      padding: 1rem 0.9rem;
    }

    .causal-chain li:last-child {
      border-bottom: 0;
    }

    .causal-chain li::after,
    .causal-chain li:nth-child(3)::after {
      top: auto;
      right: 1rem;
      bottom: -0.55rem;
      display: grid;
      transform: rotate(90deg);
    }

    .causal-chain li:last-child::after {
      display: none;
    }

    .trust-banner {
      grid-template-columns: 1fr;
      padding: 1.15rem;
    }

    .trust-mark {
      display: none;
    }

    .trust-banner code {
      grid-column: 1;
    }

    .load-panel,
    .error-panel {
      grid-template-columns: 1fr;
      gap: 1.3rem;
    }

    .loading-symbol,
    .error-glyph {
      width: 54px;
      height: 54px;
    }

    .error-actions,
    .method-links {
      display: grid;
      grid-template-columns: 1fr;
    }

    .dossier-stats {
      grid-template-columns: 1fr;
    }

    .dossier-stats > div {
      min-height: 80px;
    }

    .walls-card {
      padding: 1.2rem;
    }

    .claim-card-main {
      padding: 1.1rem;
    }

    .claim-card-head {
      align-items: flex-start;
      flex-direction: column;
    }

    .claim-id {
      max-width: 100%;
    }

    .claim-meta,
    .source-meta,
    .trace-grid,
    .calculation-meta {
      grid-template-columns: 1fr;
    }

    .claim-meta {
      gap: 0.75rem;
    }

    .trace-block,
    .trace-block:nth-child(2n) {
      border-right: 0;
    }

    .source-entry {
      padding: 1.4rem 0;
    }

    .claim-legend > div {
      grid-template-columns: 1fr;
      gap: 0.35rem;
    }

    .footer {
      min-height: 108px;
    }

    .footer-brand .brand-depth,
    .footer-brand .brand-divider {
      display: none;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      scroll-behavior: auto !important;
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }

  @media (prefers-contrast: more) {
    :root {
      --line: rgba(244, 240, 233, 0.28);
      --line-strong: rgba(244, 240, 233, 0.46);
      --muted: #b9b4bf;
      --muted-strong: #d0cbd4;
    }
  }

  @media print {
    :root {
      color-scheme: light;
      --bg: #fff;
      --surface: #fff;
      --ink: #111;
      --ink-soft: #222;
      --muted: #555;
      --muted-strong: #333;
      --line: rgba(0, 0, 0, 0.18);
      --line-strong: rgba(0, 0, 0, 0.34);
    }

    body {
      background: #fff;
    }

    body::before,
    .topbar,
    .load-panel,
    .button,
    .footer,
    .status-pill {
      display: none !important;
    }

    .hero {
      min-height: auto;
      padding-top: 1rem;
    }

    .claim-card,
    .comparison-card,
    .walls-card,
    .thesis-card {
      break-inside: avoid;
      box-shadow: none;
    }

    .claim-trace:not([open]) > *:not(summary),
    .source-limitations:not([open]) > *:not(summary) {
      display: block;
    }
  }
}