/*! Research Visual System v1.3.0
 * Skin entry point: edit the semantic tokens in :root and html[data-theme="dim"].
 * Components and responsive behavior below consume those tokens.
 */

:root {
      --page: #eaf0ef;
      --surface: #fbfdfc;
      --surface-muted: #f1f6f4;
      --surface-strong: #e0ebe8;
      --ink: #18302d;
      --ink-soft: #536966;
      --ink-faint: #71827f;
      --line: #c8d7d3;
      --line-strong: #9eb5b0;
      --accent: #006e60;
      --accent-strong: #005449;
      --accent-soft: #d7ebe6;
      --amber: #805600;
      --amber-soft: #f3ead5;
      --danger: #8b3f42;
      --danger-soft: #f3e2e2;
      --focus: #b85600;
      --white: #ffffff;
      --shadow: 0 12px 36px rgba(24, 48, 45, 0.08);
      --body-size: 1rem;
      --content-width: 48rem;
      --header-height: 4rem;
      --radius-sm: 0.25rem;
      --radius-md: 0.75rem;
      --radius-lg: 1.25rem;
      --font-display: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", serif;
      --font-body: "MiSans", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      --font-data: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
    }

    html[data-theme="dim"] {
      --page: #0f1a18;
      --surface: #152320;
      --surface-muted: #1b2d29;
      --surface-strong: #243a35;
      --ink: #e8f1ef;
      --ink-soft: #b4c7c3;
      --ink-faint: #8fa6a1;
      --line: #344a45;
      --line-strong: #526c66;
      --accent: #76d3c0;
      --accent-strong: #9ee3d4;
      --accent-soft: #1e443c;
      --amber: #f0c46b;
      --amber-soft: #3a301d;
      --danger: #f0a1a3;
      --danger-soft: #40282a;
      --focus: #ffb15e;
      --white: #152320;
      --shadow: 0 12px 36px rgba(0, 0, 0, 0.24);
    }

    html[data-font="large"] {
      --body-size: 1.125rem;
      --content-width: 50rem;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: calc(var(--header-height) + 1.5rem);
      background: var(--page);
    }

    body {
      margin: 0;
      min-width: 20rem;
      color: var(--ink);
      background: var(--page);
      font-family: var(--font-body);
      font-size: var(--body-size);
      line-height: 1.82;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }

    button,
    input,
    select {
      font: inherit;
    }

    button,
    select,
    input[type="range"] {
      accent-color: var(--accent);
    }

    button {
      color: inherit;
    }

    a {
      color: var(--accent-strong);
      text-decoration-thickness: 0.08em;
      text-underline-offset: 0.18em;
    }

    a:hover {
      text-decoration-thickness: 0.14em;
    }

    :focus-visible {
      outline: 0.2rem solid var(--focus);
      outline-offset: 0.2rem;
      border-radius: var(--radius-sm);
    }

    ::selection {
      color: var(--ink);
      background: var(--accent-soft);
    }

    .skip-link {
      position: fixed;
      z-index: 1000;
      top: 0.75rem;
      left: 0.75rem;
      padding: 0.65rem 0.9rem;
      color: var(--surface);
      background: var(--ink);
      transform: translateY(-180%);
      transition: transform 160ms ease;
    }

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

    .reading-progress {
      position: fixed;
      z-index: 999;
      inset: 0 auto auto 0;
      width: 100%;
      height: 0.2rem;
      pointer-events: none;
      background: transparent;
    }

    .reading-progress span {
      display: block;
      width: 0;
      height: 100%;
      background: var(--accent);
      transition: width 80ms linear;
    }

    .site-header {
      position: sticky;
      z-index: 100;
      top: 0;
      min-height: var(--header-height);
      border-bottom: 1px solid var(--line);
      background: var(--surface);
      background: color-mix(in srgb, var(--surface) 92%, transparent);
      backdrop-filter: blur(12px);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: min(100% - 2rem, 90rem);
      min-height: var(--header-height);
      margin-inline: auto;
      gap: 1rem;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 0.65rem;
      color: var(--ink);
      font-size: 0.875rem;
      font-weight: 700;
      line-height: 1.2;
      text-decoration: none;
      letter-spacing: 0.04em;
    }

    .brand-mark {
      display: grid;
      width: 1.8rem;
      height: 1.8rem;
      place-items: center;
      color: var(--surface);
      background: var(--accent);
      border-radius: 50%;
      font-family: var(--font-display);
      font-size: 1rem;
    }

    .header-tools {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .control-group {
      display: inline-flex;
      align-items: center;
      padding: 0.2rem;
      border: 1px solid var(--line);
      background: var(--surface-muted);
      border-radius: 999px;
    }

    .control-label {
      margin-inline: 0.55rem 0.25rem;
      color: var(--ink-faint);
      font-size: 0.75rem;
      white-space: nowrap;
    }

    .tool-button,
    .language-link {
      min-height: 2rem;
      padding: 0.35rem 0.7rem;
      border: 0;
      color: var(--ink-soft);
      background: transparent;
      border-radius: 999px;
      cursor: pointer;
      font-size: 0.78rem;
      font-weight: 700;
      line-height: 1.3;
      text-decoration: none;
      white-space: nowrap;
    }

    .tool-button[aria-pressed="true"],
    .language-link[aria-current="page"] {
      color: var(--surface);
      background: var(--accent);
    }

    .language-link[aria-current="false"]:hover {
      color: var(--ink);
      background: var(--surface);
    }

    .icon-button {
      display: inline-grid;
      min-width: 2.6rem;
      min-height: 2.6rem;
      padding: 0.45rem;
      place-items: center;
      border: 1px solid var(--line);
      color: var(--ink-soft);
      background: var(--surface);
      border-radius: 50%;
      cursor: pointer;
    }

    .menu-button {
      display: none;
    }

    .layout {
      display: grid;
      grid-template-columns: 14rem minmax(0, var(--content-width));
      width: min(100% - 2rem, 70rem);
      margin-inline: auto;
      gap: 4rem;
      align-items: start;
    }

    .side-nav {
      position: sticky;
      top: calc(var(--header-height) + 1.5rem);
      max-height: calc(100vh - var(--header-height) - 3rem);
      padding-block: 2rem;
      overflow: auto;
      scrollbar-width: thin;
    }

    .side-nav-title {
      margin: 0 0 0.75rem;
      color: var(--ink-faint);
      font-size: 0.72rem;
      font-weight: 800;
      letter-spacing: 0.14em;
      text-transform: uppercase;
    }

    .nav-close {
      display: none;
      width: 100%;
      min-height: 2.6rem;
      margin-bottom: 1rem;
      border: 1px solid var(--line-strong);
      color: var(--accent-strong);
      background: var(--surface-muted);
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-weight: 800;
    }

    .side-nav ol {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .side-nav li + li {
      margin-top: 0.18rem;
    }

    .side-nav a {
      display: grid;
      grid-template-columns: 1.6rem 1fr;
      align-items: baseline;
      padding: 0.45rem 0.5rem;
      color: var(--ink-soft);
      border-left: 0.15rem solid transparent;
      font-size: 0.82rem;
      line-height: 1.45;
      text-decoration: none;
    }

    .side-nav a span {
      color: var(--ink-faint);
      font-family: var(--font-data);
      font-size: 0.68rem;
    }

    .side-nav a:hover {
      color: var(--ink);
      background: var(--surface-muted);
    }

    .side-nav a[aria-current="true"] {
      color: var(--accent-strong);
      border-left-color: var(--accent);
      background: var(--accent-soft);
      font-weight: 700;
    }

    .nav-note {
      margin-top: 1.5rem;
      padding: 0.8rem 0 0 0.65rem;
      border-top: 1px solid var(--line);
      color: var(--ink-faint);
      font-size: 0.72rem;
      line-height: 1.65;
    }

    .nav-backdrop {
      display: none;
    }

    main {
      min-width: 0;
      padding-bottom: 8rem;
    }

    .hero {
      min-height: min(43rem, calc(100vh - var(--header-height)));
      padding: clamp(4rem, 9vw, 7rem) 0 4rem;
      border-bottom: 1px solid var(--line-strong);
    }

    .eyebrow {
      display: flex;
      align-items: center;
      gap: 0.65rem;
      margin: 0 0 1.5rem;
      color: var(--accent-strong);
      font-family: var(--font-data);
      font-size: 0.72rem;
      font-weight: 800;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .eyebrow::before {
      width: 2.4rem;
      height: 1px;
      content: "";
      background: var(--accent);
    }

    h1,
    h2,
    h3 {
      color: var(--ink);
      font-family: var(--font-display);
      font-weight: 700;
      text-wrap: balance;
    }

    h1 {
      max-width: 13ch;
      margin: 0;
      font-size: clamp(2.5rem, 7vw, 4.8rem);
      line-height: 1.12;
      letter-spacing: -0.045em;
    }

    .hero-lead {
      max-width: 40rem;
      margin: 1.75rem 0 0;
      color: var(--ink-soft);
      font-size: clamp(1rem, 2vw, 1.2rem);
      line-height: 1.8;
    }

    .hero-ledger {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      max-width: 38rem;
      margin-top: 2.5rem;
      padding: 1rem 1.25rem;
      border: 1px solid var(--line);
      border-left: 0.3rem solid var(--accent);
      background: var(--surface);
      box-shadow: var(--shadow);
    }

    .ledger-row {
      display: contents;
    }

    .ledger-row dt,
    .ledger-row dd {
      margin: 0;
      padding: 0.75rem 0;
      border-bottom: 1px dashed var(--line);
    }

    .ledger-row:last-child dt,
    .ledger-row:last-child dd {
      border-bottom: 0;
    }

    .ledger-row dt {
      color: var(--ink-soft);
      font-size: 0.88rem;
    }

    .ledger-row dd {
      padding-left: 2rem;
      color: var(--ink);
      font-family: var(--font-data);
      font-weight: 800;
      text-align: right;
      white-space: nowrap;
    }

    .ledger-row.unknown dd {
      color: var(--danger);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      margin-top: 2rem;
      gap: 0.75rem;
    }

    .button-link {
      display: inline-flex;
      min-height: 2.8rem;
      align-items: center;
      justify-content: center;
      padding: 0.6rem 1rem;
      border: 1px solid var(--accent);
      color: var(--surface);
      background: var(--accent);
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 800;
      text-decoration: none;
    }

    .button-link.secondary {
      color: var(--accent-strong);
      background: transparent;
    }

    .reading-state {
      margin: 1.25rem 0 0;
      color: var(--ink-faint);
      font-size: 0.78rem;
    }

    .section {
      padding: clamp(4rem, 8vw, 6rem) 0;
      border-bottom: 1px solid var(--line-strong);
    }

    .section-head {
      display: grid;
      grid-template-columns: 3rem minmax(0, 1fr);
      margin-bottom: 2.25rem;
      gap: 1rem;
    }

    .section-number {
      padding-top: 0.35rem;
      color: var(--accent);
      font-family: var(--font-data);
      font-size: 0.75rem;
      font-weight: 800;
    }

    h2 {
      margin: 0;
      font-size: clamp(1.85rem, 4vw, 2.6rem);
      line-height: 1.2;
      letter-spacing: -0.025em;
    }

    .section-intro {
      max-width: 42rem;
      margin: 0.8rem 0 0;
      color: var(--ink-soft);
      font-size: 1.02em;
    }

    h3 {
      margin: 3rem 0 1rem;
      font-size: clamp(1.25rem, 2.5vw, 1.55rem);
      line-height: 1.35;
    }

    p,
    ul,
    ol {
      max-width: 44rem;
    }

    p {
      margin: 0 0 1.15rem;
    }

    ul,
    ol {
      padding-left: 1.35rem;
    }

    li + li {
      margin-top: 0.45rem;
    }

    strong {
      color: var(--ink);
      font-weight: 800;
    }

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

    .answer {
      display: grid;
      grid-template-columns: minmax(8rem, 0.7fr) minmax(0, 1.8fr);
      padding: 1.5rem 0;
      border-bottom: 1px solid var(--line);
      gap: 2rem;
    }

    .answer h3 {
      margin: 0;
      font-family: var(--font-body);
      font-size: 0.85rem;
      line-height: 1.5;
    }

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

    .answer strong {
      color: var(--accent-strong);
    }

    .evidence-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      margin: 2.5rem 0;
      border-block: 1px solid var(--line-strong);
    }

    .evidence-point {
      padding: 1.4rem 1.2rem;
      border-right: 1px solid var(--line);
    }

    .evidence-point:last-child {
      border-right: 0;
    }

    .evidence-value {
      display: block;
      color: var(--ink);
      font-family: var(--font-data);
      font-size: clamp(1.45rem, 4vw, 2.25rem);
      font-weight: 800;
      line-height: 1.2;
    }

    .evidence-label {
      display: block;
      margin-top: 0.45rem;
      color: var(--ink-faint);
      font-size: 0.75rem;
      line-height: 1.5;
    }

    .callout {
      margin: 2rem 0;
      padding: 1.25rem 1.4rem;
      border-left: 0.25rem solid var(--accent);
      background: var(--accent-soft);
    }

    .callout.warning {
      border-left-color: var(--amber);
      background: var(--amber-soft);
    }

    .callout.danger {
      border-left-color: var(--danger);
      background: var(--danger-soft);
    }

    .callout-title {
      display: block;
      margin-bottom: 0.35rem;
      font-size: 0.82rem;
      font-weight: 800;
    }

    .callout p:last-child {
      margin-bottom: 0;
    }

    .definition-table {
      display: grid;
      margin: 2rem 0;
      border-top: 1px solid var(--line-strong);
    }

    .definition-row {
      display: grid;
      grid-template-columns: minmax(7rem, 0.7fr) minmax(0, 2fr);
      padding: 1rem 0;
      border-bottom: 1px solid var(--line);
      gap: 1.5rem;
    }

    .definition-row dt,
    .definition-row dd {
      margin: 0;
    }

    .definition-row dt {
      font-weight: 800;
    }

    .definition-row dd {
      color: var(--ink-soft);
    }

    .formula {
      margin: 2rem 0;
      padding: 1.25rem;
      overflow: auto;
      color: var(--ink);
      border: 1px solid var(--line);
      background: var(--surface-muted);
      font-family: var(--font-data);
      font-size: 0.82rem;
      line-height: 1.85;
      white-space: pre;
    }

    .calculator {
      margin: 2.5rem 0;
      border: 1px solid var(--line-strong);
      background: var(--surface);
      box-shadow: var(--shadow);
    }

    .calculator-head {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      padding: 1.25rem 1.4rem;
      border-bottom: 1px solid var(--line);
      gap: 1rem;
    }

    .calculator-head h3 {
      margin: 0;
      font-family: var(--font-body);
      font-size: 1rem;
    }

    .calculator-head p {
      margin: 0.25rem 0 0;
      color: var(--ink-faint);
      font-size: 0.78rem;
    }

    .calculator-total {
      min-width: 8.5rem;
    }

    .calculator-total label {
      display: block;
      color: var(--ink-faint);
      font-size: 0.72rem;
      font-weight: 800;
    }

    .calculator-total input {
      width: 100%;
      margin-top: 0.3rem;
      padding: 0.45rem 0.55rem;
      border: 1px solid var(--line-strong);
      color: var(--ink);
      background: var(--surface-muted);
      border-radius: var(--radius-sm);
      font-family: var(--font-data);
    }

    .cost-controls {
      padding: 0.5rem 1.4rem;
    }

    .cost-row {
      display: grid;
      grid-template-columns: minmax(8rem, 1fr) minmax(8rem, 1.5fr) 3.6rem;
      align-items: center;
      padding: 0.75rem 0;
      border-bottom: 1px dashed var(--line);
      gap: 1rem;
    }

    .cost-row:last-child {
      border-bottom: 0;
    }

    .cost-row label {
      color: var(--ink-soft);
      font-size: 0.82rem;
    }

    .cost-row input[type="range"] {
      width: 100%;
      min-height: 2rem;
    }

    .cost-row output {
      color: var(--ink);
      font-family: var(--font-data);
      font-size: 0.82rem;
      font-weight: 800;
      text-align: right;
    }

    .calculator-result {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      border-top: 1px solid var(--line-strong);
      background: var(--surface-muted);
    }

    .result-cell {
      padding: 1.1rem 1.4rem;
      border-right: 1px solid var(--line);
    }

    .result-cell:last-child {
      border-right: 0;
    }

    .result-cell small {
      display: block;
      color: var(--ink-faint);
      font-size: 0.7rem;
      font-weight: 800;
    }

    .result-cell output,
    .result-cell strong {
      display: block;
      margin-top: 0.25rem;
      color: var(--ink);
      font-family: var(--font-data);
      font-size: 1.1rem;
    }

    .result-cell strong[data-state="healthy"] {
      color: var(--accent-strong);
    }

    .result-cell strong[data-state="thin"] {
      color: var(--amber);
    }

    .result-cell strong[data-state="loss"] {
      color: var(--danger);
    }

    .rank-list {
      margin: 2rem 0;
      border-top: 1px solid var(--line-strong);
    }

    .rank-item {
      display: grid;
      grid-template-columns: 3.5rem minmax(0, 1fr);
      padding: 1.35rem 0;
      border-bottom: 1px solid var(--line);
      gap: 1.25rem;
    }

    .grade {
      display: grid;
      width: 2.6rem;
      height: 2.6rem;
      place-items: center;
      border: 1px solid var(--line-strong);
      color: var(--accent-strong);
      background: var(--accent-soft);
      border-radius: 50%;
      font-family: var(--font-data);
      font-size: 0.75rem;
      font-weight: 800;
    }

    .grade.caution {
      color: var(--amber);
      background: var(--amber-soft);
    }

    .grade.risk {
      color: var(--danger);
      background: var(--danger-soft);
    }

    .rank-item h3 {
      margin: 0;
      font-family: var(--font-body);
      font-size: 1rem;
    }

    .rank-item p {
      margin: 0.35rem 0 0;
      color: var(--ink-soft);
      font-size: 0.92rem;
    }

    .catalog-list {
      margin: 2rem 0;
      border-top: 1px solid var(--line-strong);
    }

    .catalog-card {
      padding: clamp(1.75rem, 4vw, 2.75rem) 0;
      border-bottom: 1px solid var(--line-strong);
    }

    .catalog-meta {
      display: flex;
      max-width: none;
      flex-wrap: wrap;
      margin: 0 0 0.85rem;
      gap: 0.45rem 1rem;
      color: var(--ink-faint);
      font-family: var(--font-data);
      font-size: 0.72rem;
      font-weight: 800;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .catalog-meta span + span::before {
      margin-right: 1rem;
      color: var(--line-strong);
      content: "/";
    }

    .catalog-card h3 {
      max-width: 34ch;
      margin: 0;
      font-size: clamp(1.45rem, 3.4vw, 2rem);
      line-height: 1.32;
    }

    .catalog-card h3 a {
      color: inherit;
      text-decoration-color: var(--accent);
      text-decoration-thickness: 0.08em;
      text-underline-offset: 0.18em;
    }

    .catalog-card > p:not(.catalog-meta) {
      margin: 1rem 0 0;
      color: var(--ink-soft);
    }

    .catalog-card .hero-actions {
      margin-top: 1.5rem;
    }

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

    .principle-card {
      min-width: 0;
      padding: 1.35rem;
      border: 1px solid var(--line);
      background: var(--surface);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow);
    }

    .principle-card p {
      margin: 0.65rem 0 0;
      color: var(--ink-soft);
      font-size: 0.92rem;
    }

    .method-steps {
      display: grid;
      margin: 0;
      padding: 0;
      counter-reset: method-step;
      list-style: none;
      gap: 0;
    }

    .method-steps li {
      position: relative;
      margin: 0;
      padding: 1.15rem 0 1.15rem 3.25rem;
      border-bottom: 1px solid var(--line);
      counter-increment: method-step;
    }

    .method-steps li::before {
      position: absolute;
      top: 1.15rem;
      left: 0;
      display: grid;
      width: 2rem;
      height: 2rem;
      place-items: center;
      color: var(--accent-strong);
      background: var(--accent-soft);
      border-radius: 50%;
      content: counter(method-step, decimal-leading-zero);
      font-family: var(--font-data);
      font-size: 0.68rem;
      font-weight: 800;
    }

    .prompt-box {
      display: grid;
      margin: 2rem 0 0;
      padding: 1.15rem 1.25rem;
      border: 1px solid var(--line-strong);
      border-left: 0.3rem solid var(--accent);
      background: var(--surface);
      box-shadow: var(--shadow);
      gap: 0.6rem;
    }

    .prompt-label {
      color: var(--ink-faint);
      font-family: var(--font-data);
      font-size: 0.68rem;
      font-weight: 800;
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }

    .prompt-box code {
      overflow-wrap: anywhere;
      color: var(--ink);
      font-family: var(--font-data);
      font-size: 0.9rem;
      line-height: 1.7;
    }

    .error-shell {
      width: min(100% - 2rem, 58rem);
      margin-inline: auto;
      padding: clamp(4rem, 12vw, 8rem) 0;
    }

    .error-code {
      margin: 0 0 0.75rem;
      color: var(--accent);
      font-family: var(--font-data);
      font-size: 0.78rem;
      font-weight: 800;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .error-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      margin-top: 2.5rem;
      border-block: 1px solid var(--line-strong);
    }

    .error-panel {
      min-width: 0;
      padding: 1.75rem 0;
    }

    .error-panel + .error-panel {
      padding-left: 1.75rem;
      border-left: 1px solid var(--line-strong);
    }

    .error-panel h2 {
      font-size: clamp(1.45rem, 3vw, 2rem);
    }

    details {
      margin: 1rem 0;
      border-block: 1px solid var(--line);
      background: var(--surface);
    }

    details + details {
      margin-top: -1px;
    }

    summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 3.4rem;
      padding: 0.7rem 0.85rem;
      cursor: pointer;
      font-weight: 800;
      list-style: none;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    summary::after {
      color: var(--accent);
      content: "＋";
      font-family: var(--font-data);
      font-size: 1rem;
    }

    details[open] summary::after {
      content: "－";
    }

    .details-body {
      padding: 0 0.85rem 1.25rem;
      color: var(--ink-soft);
    }

    .details-body > :last-child {
      margin-bottom: 0;
    }

    .table-wrap {
      margin: 1.5rem 0;
      overflow-x: auto;
      border-block: 1px solid var(--line-strong);
      background: var(--surface);
      scrollbar-color: var(--line-strong) var(--surface-muted);
    }

    .scroll-hint {
      display: none;
      margin: 0 0 -0.75rem;
      color: var(--ink-faint);
      font-size: 0.72rem;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.84rem;
      line-height: 1.65;
    }

    caption {
      padding: 0.8rem 0;
      color: var(--ink-faint);
      font-size: 0.72rem;
      text-align: left;
    }

    th,
    td {
      padding: 0.9rem 0.8rem;
      border-bottom: 1px solid var(--line);
      vertical-align: top;
      text-align: left;
    }

    th {
      color: var(--ink);
      background: var(--surface-muted);
      font-size: 0.75rem;
      letter-spacing: 0.02em;
    }

    td {
      color: var(--ink-soft);
    }

    tbody tr:last-child td {
      border-bottom: 0;
    }

    .snapshot {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      margin: 2rem 0;
      border: 1px solid var(--line);
      background: var(--surface);
    }

    .snapshot div {
      padding: 1rem;
      border-right: 1px solid var(--line);
    }

    .snapshot div:last-child {
      border-right: 0;
    }

    .snapshot dt {
      color: var(--ink-faint);
      font-size: 0.72rem;
      font-weight: 800;
    }

    .snapshot dd {
      margin: 0.35rem 0 0;
      color: var(--ink);
      font-weight: 800;
    }

    .flow {
      display: grid;
      margin: 2rem 0;
      border-block: 1px solid var(--line-strong);
    }

    .flow-step {
      display: grid;
      grid-template-columns: 2.6rem minmax(0, 1fr);
      padding: 0.9rem 0;
      border-bottom: 1px solid var(--line);
      gap: 1rem;
    }

    .flow-step:last-child {
      border-bottom: 0;
    }

    .flow-step span {
      color: var(--accent);
      font-family: var(--font-data);
      font-size: 0.72rem;
      font-weight: 800;
    }

    .flow-step p {
      margin: 0;
    }

    .filter-bar {
      display: flex;
      flex-wrap: wrap;
      margin: 1.5rem 0 0.75rem;
      gap: 0.45rem;
    }

    .filter-button {
      min-height: 2.35rem;
      padding: 0.4rem 0.75rem;
      border: 1px solid var(--line-strong);
      color: var(--ink-soft);
      background: var(--surface);
      border-radius: 999px;
      cursor: pointer;
      font-size: 0.75rem;
      font-weight: 800;
    }

    .filter-button[aria-pressed="true"] {
      color: var(--surface);
      border-color: var(--accent);
      background: var(--accent);
    }

    .filter-status {
      min-height: 1.4rem;
      margin: 0;
      color: var(--ink-faint);
      font-size: 0.72rem;
    }

    tr[hidden] {
      display: none;
    }

    .decision-tool {
      margin: 2rem 0;
      border: 1px solid var(--line-strong);
      background: var(--surface);
    }

    .decision-row {
      display: grid;
      grid-template-columns: minmax(7rem, 0.8fr) minmax(0, 1.6fr);
      align-items: center;
      padding: 0.9rem 1.1rem;
      border-bottom: 1px solid var(--line);
      gap: 1rem;
    }

    .decision-row label {
      font-weight: 800;
    }

    .decision-row select {
      width: 100%;
      min-height: 2.7rem;
      padding: 0.4rem 2.2rem 0.4rem 0.65rem;
      border: 1px solid var(--line-strong);
      color: var(--ink);
      background: var(--surface-muted);
      border-radius: var(--radius-sm);
    }

    .decision-result {
      display: grid;
      grid-template-columns: auto 1fr;
      align-items: center;
      padding: 1.25rem 1.1rem;
      background: var(--surface-muted);
      gap: 1.25rem;
    }

    .score {
      display: grid;
      width: 4.6rem;
      height: 4.6rem;
      place-items: center;
      color: var(--surface);
      background: var(--accent);
      border-radius: 50%;
      font-family: var(--font-data);
      font-size: 1.2rem;
      font-weight: 800;
    }

    .decision-result h3 {
      margin: 0;
      font-family: var(--font-body);
      font-size: 1rem;
    }

    .decision-result p {
      margin: 0.25rem 0 0;
      color: var(--ink-soft);
      font-size: 0.82rem;
    }

    .timeline {
      margin: 2rem 0;
      border-left: 1px solid var(--line-strong);
    }

    .timeline-item {
      position: relative;
      padding: 0 0 2.2rem 1.6rem;
    }

    .timeline-item:last-child {
      padding-bottom: 0;
    }

    .timeline-item::before {
      position: absolute;
      top: 0.45rem;
      left: -0.35rem;
      width: 0.65rem;
      height: 0.65rem;
      content: "";
      border: 0.15rem solid var(--page);
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 0 1px var(--accent);
    }

    .timeline-item time {
      color: var(--accent-strong);
      font-family: var(--font-data);
      font-size: 0.72rem;
      font-weight: 800;
    }

    .timeline-item h3 {
      margin: 0.2rem 0 0.45rem;
      font-family: var(--font-body);
      font-size: 1rem;
    }

    .timeline-item ul {
      margin: 0;
      color: var(--ink-soft);
      font-size: 0.9rem;
    }

    .sources {
      columns: 2 18rem;
      column-gap: 2.5rem;
      margin: 1.5rem 0 0;
      padding: 0;
      list-style: none;
    }

    .sources li {
      break-inside: avoid;
      margin: 0 0 0.8rem;
      padding-bottom: 0.8rem;
      border-bottom: 1px solid var(--line);
      font-size: 0.8rem;
      line-height: 1.55;
    }

    .source-type {
      display: block;
      color: var(--ink-faint);
      font-family: var(--font-data);
      font-size: 0.65rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .footer {
      padding: 3rem 0 0;
      color: var(--ink-faint);
      font-size: 0.74rem;
    }

    .footer p {
      max-width: 100%;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem 1.25rem;
    }

    .footer-links a {
      color: var(--ink-soft);
      font-weight: 800;
    }

    .footer-links a[aria-current="page"] {
      color: var(--ink);
      text-decoration: none;
    }

    .brief-only {
      display: block;
    }

    .no-js[data-reading="brief"] .detail-layer {
      display: block;
    }

    html[data-reading="full"] .brief-only {
      display: none;
    }

    html[data-reading="brief"] .detail-layer {
      display: none;
    }

    .mode-notice {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin: 1.5rem 0;
      padding: 0.8rem 1rem;
      border: 1px solid var(--line);
      color: var(--ink-soft);
      background: var(--surface-muted);
      gap: 1rem;
      font-size: 0.78rem;
    }

    .mode-notice button {
      border: 0;
      color: var(--accent-strong);
      background: transparent;
      cursor: pointer;
      font-weight: 800;
      text-decoration: underline;
      text-underline-offset: 0.18em;
      white-space: nowrap;
    }

    .noscript {
      padding: 0.75rem 1rem;
      color: var(--ink);
      background: var(--amber-soft);
      border-bottom: 1px solid var(--line);
      text-align: center;
      font-size: 0.82rem;
    }

    @media (max-width: 64rem) {
      .layout {
        grid-template-columns: minmax(0, var(--content-width));
        width: min(100% - 2.5rem, var(--content-width));
        justify-content: center;
      }

      .side-nav {
        position: fixed;
        z-index: 120;
        top: var(--header-height);
        bottom: 0;
        left: 0;
        width: min(20rem, calc(100vw - 3rem));
        max-height: none;
        padding: 1.5rem;
        background: var(--surface);
        box-shadow: var(--shadow);
        transform: translateX(-105%);
        transition: transform 180ms ease;
      }

      .nav-close {
        display: block;
      }

      body.nav-open {
        overflow: hidden;
      }

      body.nav-open .side-nav {
        transform: translateX(0);
      }

      .nav-backdrop {
        position: fixed;
        z-index: 110;
        inset: var(--header-height) 0 0;
        display: none;
        border: 0;
        background: rgba(10, 24, 22, 0.48);
      }

      body.nav-open .nav-backdrop {
        display: block;
      }

      .menu-button {
        display: inline-grid;
      }
    }

    @media (max-width: 48rem) {
      :root {
        --header-height: 3.6rem;
      }

      .header-inner {
        width: min(100% - 1rem, 90rem);
      }

      .brand span:last-child {
        display: none;
      }

      .control-label,
      .font-controls {
        display: none;
      }

      .layout {
        width: min(100% - 1.5rem, var(--content-width));
      }

      .principle-grid {
        grid-template-columns: 1fr;
      }

      .error-grid {
        grid-template-columns: 1fr;
      }

      .error-panel + .error-panel {
        padding-left: 0;
        border-top: 1px solid var(--line-strong);
        border-left: 0;
      }

      .hero {
        min-height: auto;
        padding-block: 3.5rem 3rem;
      }

      h1 {
        font-size: clamp(2.35rem, 12vw, 3.7rem);
      }

      .section {
        padding-block: 3.5rem;
      }

      .section-head {
        grid-template-columns: 2rem minmax(0, 1fr);
        gap: 0.6rem;
      }

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

      .evidence-strip,
      .calculator-result,
      .snapshot {
        grid-template-columns: 1fr;
      }

      .evidence-point,
      .result-cell,
      .snapshot div {
        border-right: 0;
        border-bottom: 1px solid var(--line);
      }

      .evidence-point:last-child,
      .result-cell:last-child,
      .snapshot div:last-child {
        border-bottom: 0;
      }

      .calculator-head {
        display: grid;
      }

      .calculator-total {
        width: 100%;
      }

      .cost-row {
        grid-template-columns: 1fr 3.2rem;
        gap: 0.45rem 0.75rem;
      }

      .cost-row input[type="range"] {
        grid-column: 1 / -1;
        grid-row: 2;
      }

      .definition-row,
      .decision-row {
        grid-template-columns: 1fr;
        gap: 0.45rem;
      }

      .scroll-hint {
        display: block;
      }

      table {
        min-width: 44rem;
      }

      .decision-result {
        align-items: start;
      }

      .mode-notice {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    @media (max-width: 30rem) {
      .hero-ledger {
        display: block;
        padding: 0.55rem 1rem;
      }

      .ledger-row {
        display: grid;
        grid-template-columns: 1fr;
        padding: 0.75rem 0;
        border-bottom: 1px dashed var(--line);
      }

      .ledger-row:last-child {
        border-bottom: 0;
      }

      .ledger-row dt,
      .ledger-row dd {
        padding: 0;
        border-bottom: 0;
      }

      .ledger-row dd {
        padding-top: 0.15rem;
        padding-left: 0;
        text-align: left;
        white-space: normal;
      }
    }

    @media (max-width: 23rem) {
      .tool-button,
      .language-link {
        padding-inline: 0.5rem;
      }

      .header-tools {
        gap: 0.25rem;
      }

      .control-group {
        padding: 0.12rem;
      }

      .icon-button {
        min-width: 2.25rem;
        min-height: 2.25rem;
      }

    }

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

    @media print {
      :root {
        --page: #ffffff;
        --surface: #ffffff;
        --surface-muted: #f4f4f4;
        --ink: #111111;
        --ink-soft: #333333;
        --ink-faint: #555555;
        --line: #cccccc;
        --line-strong: #999999;
        --accent: #111111;
        --accent-strong: #111111;
        --accent-soft: #eeeeee;
      }

      html[data-reading="brief"] .detail-layer {
        display: block;
      }

      .site-header,
      .reading-progress,
      .side-nav,
      .nav-backdrop,
      .hero-actions,
      .mode-notice,
      .filter-bar,
      .filter-status,
      .calculator input[type="range"] {
        display: none !important;
      }

      body {
        font-size: 10.5pt;
        background: #ffffff;
      }

      .layout {
        display: block;
        width: auto;
        margin: 0;
      }

      main {
        padding: 0;
      }

      .hero {
        min-height: 0;
        padding-top: 1cm;
      }

      .section {
        break-before: page;
      }

      .calculator,
      .hero-ledger {
        box-shadow: none;
      }

      a {
        color: #111111;
      }

      details {
        display: block;
      }

      details > * {
        display: block;
      }

      summary::after {
        display: none;
      }
    }