:root {
  --canvas: #eef1f4;
  --paper: #ffffff;
  --ink: #172033;
  --muted: #5c6b7c;
  --line: #e1e6ee;
  --claude: #9d342c;
  --claude-soft: #f8f1ef;
  --codex: #1d4e89;
  --codex-soft: #eef3f9;
  --accent: #9d342c;
  --sans: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color-scheme: light;
}

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

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.75;
  font-weight: 400;
}

body[data-tone="claude"] {
  --accent: var(--claude);
}

body[data-tone="codex"] {
  --accent: var(--codex);
}

body[data-tone="compare"] {
  --accent: var(--ink);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--codex);
  text-underline-offset: 0.16em;
}

a:hover {
  color: #12325c;
}

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

::selection {
  background: #d5e2f2;
  color: var(--ink);
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  background: var(--paper);
  color: var(--ink);
  padding: 0.55rem 0.8rem;
}

.skip:focus {
  top: 0.7rem;
}

.top {
  position: sticky;
  top: 0;
  z-index: 6;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.top-inner,
.layout,
.site-foot {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 4.4rem;
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.mark {
  width: 44px;
  height: 44px;
  object-fit: cover;
  flex: none;
}

.mast-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  line-height: 1.2;
}

.deck {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.4;
}

.tabs {
  display: flex;
  gap: 0.35rem;
  flex: none;
}

.tabs a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 40px;
  padding: 0.3rem 0.85rem;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.tabs a[aria-current="page"] {
  background: var(--ink);
  color: #fff;
}

.dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
}

.dot-claude {
  background: var(--claude);
}

.dot-codex {
  background: #6aa0dc;
}

.tabs a[aria-current="page"] .dot-claude {
  background: #f0b2ab;
}

.tabs a[aria-current="page"] .dot-codex {
  background: #b9d4f2;
}

main,
.panel,
.table-wrap,
.toc,
.figure,
.figure-row {
  min-width: 0;
}

.layout {
  display: grid;
  grid-template-columns: 16.75rem minmax(0, 1fr);
  gap: 1.5rem;
  padding-top: 1.25rem;
  padding-bottom: 3rem;
  align-items: start;
}

.toc {
  position: sticky;
  top: 5.1rem;
  align-self: start;
  max-height: calc(100vh - 6rem);
  overflow: auto;
  padding-right: 0.35rem;
}

.toc-box > summary {
  display: none;
}

.toc-group,
.toc-part {
  margin: 0.95rem 0 0.3rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 650;
  line-height: 1.4;
}

.toc-part {
  padding-top: 0.65rem;
  border-top: 1px solid var(--line);
}

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

.toc a {
  display: block;
  padding: 0.22rem 0.45rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.84rem;
  line-height: 1.4;
  border-radius: 6px;
}

.toc-sections > li > a {
  color: var(--ink);
  font-weight: 600;
  font-size: 0.9rem;
}

.toc-subs {
  margin: 0.05rem 0 0.35rem 0.7rem;
}

.toc a[aria-current="true"] {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, white);
}

.panel[hidden] {
  padding: 0;
  border: 0;
  background: transparent;
}

.panel {
  overflow-anchor: none;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 1.6rem 1.8rem 2.4rem;
}

.kicker {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.panel h1 {
  margin: 0;
  font-size: clamp(1.7rem, 2.6vw, 2.15rem);
  line-height: 1.25;
  font-weight: 680;
  letter-spacing: -0.02em;
}

.dochead {
  margin-bottom: 1.2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.specimen {
  margin: 1rem 0 0.35rem;
  color: var(--ink);
  font-size: clamp(1.28rem, 2vw, 1.6rem);
  line-height: 1.4;
  font-weight: 650;
}

.meta,
.status {
  color: var(--muted);
  font-size: 0.95rem;
}

.meta {
  margin: 0.45rem 0 0;
}

.lead .status {
  margin-top: 0;
}

.part {
  display: block;
  margin: 2.2rem 0 0;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.folio {
  display: none;
}

.section {
  margin-top: 1.8rem;
}

.section h2,
.section h3,
.section p,
.section ul,
.section ol,
.section blockquote,
.lead p {
  max-width: 42rem;
}

h2,
h3,
.panel,
h1 {
  scroll-margin-top: 5.4rem;
}

h2 {
  margin: 0 0 0.65rem;
  font-size: 1.35rem;
  line-height: 1.35;
  font-weight: 680;
}

h3 {
  margin: 1.35rem 0 0.4rem;
  font-size: 1.08rem;
  line-height: 1.4;
  font-weight: 680;
}

p {
  margin: 0.65rem 0;
}

ul,
ol {
  margin: 0.45rem 0 0.85rem;
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.28rem;
}

.quote {
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  background: #f6f8fb;
}

.quote p {
  margin: 0.35rem 0;
}

.quote p:first-child {
  margin-top: 0;
}

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

.sample {
  margin: 1rem 0;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  background: var(--canvas);
  border: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 0.98rem;
  line-height: 1.65;
  white-space: pre-wrap;
}

code {
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.88em;
}

.table-wrap {
  max-width: 100%;
  margin: 0.9rem 0 1.2rem;
  overflow-x: auto;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  min-width: 0;
  border-collapse: collapse;
}

table.score {
  table-layout: fixed;
}

th,
td {
  padding: 0.6rem 0.75rem;
  vertical-align: top;
  text-align: left;
  font-size: 0.92rem;
  line-height: 1.5;
}

th {
  background: #f6f8fb;
  font-weight: 650;
}

tbody tr + tr td,
tbody tr + tr th {
  border-top: 1px solid var(--line);
}

td.yes,
td.mid,
td.no {
  text-align: center;
  font-weight: 700;
}

td.yes {
  color: #1d6b45;
}

td.mid {
  color: #8a5a12;
}

td.no {
  color: var(--claude);
}

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.docref {
  color: var(--muted);
  font-size: 0.92em;
  white-space: nowrap;
}

th:first-child,
td:first-child {
  min-width: 7.5rem;
}

.figure,
.figure-row {
  max-width: 100%;
  margin: 1rem 0 1.2rem;
}

.figure img,
.figure-row img {
  display: block;
  background: var(--canvas);
  border: 1px solid var(--line);
}

.phone img {
  width: min(100%, 260px);
}

.figure-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
}

figcaption {
  margin-top: 0.4rem;
  max-width: 42rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.banks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0.8rem 0 1rem;
}

.bank,
.verdict,
.packet {
  padding: 0.95rem 1rem 1rem;
}

.bank-a {
  background: var(--claude-soft);
}

.bank-b {
  background: var(--codex-soft);
}

.who {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 750;
}

.bank-a .who {
  color: var(--claude);
}

.bank-b .who {
  color: var(--codex);
}

.line {
  margin: 0.3rem 0 0.55rem;
  font-size: 1.18rem;
  line-height: 1.4;
  font-weight: 680;
}

.bank p:last-child,
.verdict p:last-child {
  margin-bottom: 0;
}

.verdict {
  background: #f6f8fb;
}

.verdict h3,
.packet h3 {
  margin-top: 0;
}

.packet {
  margin-top: 0.75rem;
  background: var(--canvas);
}

.candidates {
  padding-left: 0;
  list-style: none;
}

.candidates li {
  margin: 0.55rem 0;
  padding: 0.7rem 0.8rem;
  background: var(--paper);
  border: 1px solid var(--line);
}

.candidates .tag {
  display: block;
  margin-bottom: 0.12rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.site-foot {
  padding-bottom: 2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

html.boot .panel {
  display: none;
}

html.boot[data-initial="proposal"] #proposal,
html.boot[data-initial="research"] #research,
html.boot[data-initial="review"] #review {
  display: block;
}

@media (max-width: 860px) {
  .top-inner {
    align-items: stretch;
    flex-direction: column;
    gap: 0.55rem;
  }

  .tabs {
    overflow-x: auto;
  }

  .layout {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .toc {
    position: static;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }

  .toc-box {
    background: var(--paper);
    border: 1px solid var(--line);
  }

  .toc-box > summary {
    display: block;
    padding: 0.75rem 0.9rem;
    font-weight: 700;
    cursor: pointer;
  }

  .toc-box[open] > summary {
    border-bottom: 1px solid var(--line);
  }

  #toc {
    max-height: 16rem;
    overflow: auto;
    padding: 0.4rem 0.5rem 0.7rem;
  }

  .panel {
    padding: 1.15rem 1rem 1.6rem;
  }

  .banks,
  .figure-row {
    grid-template-columns: 1fr;
  }
}