.reasoning-page main {
  margin: 0 auto;
  max-width: 1720px;
  min-height: 100vh;
  padding: 24px 2.5vw 84px;
}

.reasoning-header {
  align-items: end;
  border-bottom: 2px solid var(--ink);
  display: flex;
  gap: 48px;
  justify-content: space-between;
  padding: 38px 0 26px;
}
.reasoning-header h1 {
  font-family: var(--serif);
  font-size: clamp(52px, 7vw, 96px);
  font-weight: 400;
  letter-spacing: -.065em;
  line-height: .86;
  margin: 16px 0 20px;
}
.reasoning-header p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  max-width: 680px;
}
.case-counter {
  align-items: end;
  display: grid;
  flex: 0 0 auto;
  gap: 12px;
  justify-items: end;
}
.case-counter > b {
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 400;
}
.case-counter > div { display: flex; gap: 6px; }
.case-counter button {
  border-radius: 50%;
  font-size: 18px;
  height: 42px;
  padding: 0;
  width: 42px;
}

.mode-summary {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.mode-summary article {
  border-left: 1px solid var(--line);
  display: grid;
  gap: 11px;
  padding: 18px 20px;
}
.mode-summary article:first-child { border-left: 0; }
.mode-summary header {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
}
.mode-summary h3 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 500;
  margin: 0;
  text-transform: capitalize;
}
.mode-summary small {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.summary-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 14px;
}
.summary-metrics span {
  color: var(--muted);
  font-size: 10px;
}
.summary-metrics b { color: var(--ink); font-weight: 750; }

.reasoning-question {
  border-bottom: 1px solid var(--line);
  padding: 24px 0 22px;
}
.reasoning-question > div {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
}
.human-signal {
  color: var(--muted);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
}
.reasoning-question h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 54px);
  font-weight: 400;
  letter-spacing: -.045em;
  line-height: 1;
  margin: 12px 0 0;
}
.reasoning-question p {
  color: var(--muted);
  font-size: 11px;
  margin: 10px 0 0;
}
.reasoning-question p:empty { display: none; }

.reasoning-grid {
  align-items: stretch;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 12px;
}
.experiment-section { margin-top: 12px; }
.experiment-heading {
  align-items: end;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 18px 0 14px;
}
.experiment-heading h2 {
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 400;
  letter-spacing: -.04em;
  line-height: 1;
  margin: 8px 0 0;
}
.experiment-heading h2 i {
  color: var(--muted);
  font-size: .72em;
  font-weight: 400;
}
.experiment-heading > p {
  color: var(--muted);
  font-size: 10px;
  margin: 0;
  max-width: 360px;
  text-align: right;
}
.model-comparison-grid {
  align-items: stretch;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 12px;
}
.reasoning-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 4px solid #747a72;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.reasoning-card[data-level="low"] { border-top-color: #62d3a0; }
.reasoning-card[data-level="medium"] { border-top-color: #d9ad4a; }
.reasoning-card[data-level="high"] { border-top-color: #788ee8; }
.reasoning-card[data-model="pro"] { border-top-color: #788ee8; }
.reasoning-card[data-model="flash"] { border-top-color: #62d3a0; }
.reasoning-card > header {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 12px;
  min-height: 96px;
  padding: 16px 18px;
}
.mode-title {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
}
.mode-title strong {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 500;
  text-transform: capitalize;
}
.mode-title small {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.case-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.case-metrics span {
  background: color-mix(in srgb, var(--paper) 72%, transparent);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 9px;
  padding: 5px 7px;
  white-space: nowrap;
}
.case-metrics b { color: var(--ink); font-weight: 750; }
.reasoning-answer {
  flex: 1;
  font-size: 13px;
  line-height: 1.66;
  min-height: 380px;
  padding: clamp(20px, 2.2vw, 34px);
}

.reference-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 12px;
}
.reference-grid details {
  background: var(--card);
  border: 1px solid var(--line);
}
.reference-grid summary {
  cursor: pointer;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .07em;
  padding: 16px 18px;
  text-transform: uppercase;
}
.reference-grid details > div {
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.6;
  padding: 24px;
}

.loading-card {
  color: var(--muted);
  grid-column: 1 / -1;
  padding: 48px 0;
  text-align: center;
}

@media (max-width: 1100px) {
  .mode-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mode-summary article:nth-child(3) { border-top: 1px solid var(--line); }
  .reasoning-grid { grid-template-columns: 1fr; }
  .reasoning-answer { min-height: auto; }
}

@media (max-width: 760px) {
  .reasoning-header {
    align-items: stretch;
    flex-direction: column;
    gap: 24px;
  }
  .case-counter {
    align-items: center;
    display: flex;
    justify-content: space-between;
  }
  .mode-summary { grid-template-columns: 1fr; }
  .mode-summary article {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .mode-summary article:first-child { border-top: 0; }
  .reference-grid { grid-template-columns: 1fr; }
  .model-comparison-grid { grid-template-columns: 1fr; }
  .experiment-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
  .experiment-heading > p { text-align: left; }
}

@media (max-width: 520px) {
  .reasoning-page main { padding-left: 4vw; padding-right: 4vw; }
  .reasoning-question > div {
    align-items: flex-start;
    flex-direction: column;
  }
}