:root {
  font-family: Arial, Helvetica, sans-serif;
  color: #242c42;
  background: #f8f9fc;
  font-synthesis: none;
  scroll-behavior: smooth;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: inherit;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button:focus-visible,
a:focus-visible,
pre:focus-visible {
  outline: 3px solid #6762eb;
  outline-offset: 4px;
}
button {
  font: inherit;
}
.topbar,
main,
footer {
  max-width: 1280px;
  margin: auto;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 32px;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 28px;
  letter-spacing: -1.5px;
  text-decoration: none;
}
.tag {
  font: 9px monospace;
  letter-spacing: 0.12em;
  color: #858a9b;
  border-left: 1px solid #cdd0d9;
  margin-left: 10px;
  padding-left: 20px;
}
.stones {
  display: flex;
  width: 25px;
  height: 28px;
  flex-direction: column-reverse;
  align-items: center;
  gap: 2px;
}
.stones i {
  display: block;
  height: 7px;
  background: #6058d3;
  border-radius: 60% 40% 30% 35%;
  width: 24px;
}
.stones i:nth-child(2) {
  width: 18px;
  transform: rotate(-8deg);
}
.stones i:nth-child(3) {
  width: 11px;
  transform: rotate(12deg);
}
nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 12px;
}
nav a {
  text-decoration: none;
}
.outline {
  border: 1px solid #d3d6e1;
  border-radius: 6px;
  padding: 12px 16px;
}
main {
  padding: 0 32px;
}
.intro {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 75px 0 55px;
}
.eyebrow,
.mono {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
}
.eyebrow {
  color: #6d7390;
  margin: 0 0 28px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #7c74db;
}
.intro h1 {
  font-size: clamp(60px, 6.7vw, 90px);
  line-height: 1.02;
  letter-spacing: -5px;
  font-weight: 500;
  margin: 0;
}
.intro h1 span {
  color: #7974cc;
}
.intro-copy {
  max-width: 410px;
  padding-top: 45px;
}
.intro-copy > p:first-child {
  font-size: 22px;
  line-height: 1.4;
  letter-spacing: -0.4px;
}
.secondary {
  font-size: 15px;
  line-height: 1.8;
  color: #727888;
}
.text-link {
  display: inline-flex;
  gap: 50px;
  font-size: 13px;
  text-decoration: none;
  border-bottom: 1px solid #a9a5d7;
  padding: 14px 0 10px;
  color: #5951b6;
}
.intent-strip {
  border: 1px solid #dfe1ed;
  background: #eeedf8;
  border-radius: 8px;
  display: flex;
  align-items: center;
  padding: 19px 22px;
  gap: 28px;
}
.intent-strip > .mono {
  color: #7b729f;
  flex-shrink: 0;
}
.intent-strip p {
  font-size: 15px;
  margin: 0;
  flex: 1;
}
.pill {
  font: 9px monospace;
  letter-spacing: 0.05em;
  color: #7c7799;
  border: 1px solid #d6d2e8;
  padding: 7px 8px;
  border-radius: 4px;
  white-space: nowrap;
}
.section-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 52px 0 22px;
  gap: 16px;
}
.section-top h2 {
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.4px;
}
.record-label {
  font: 9px monospace;
  letter-spacing: 0.08em;
  color: #72788c;
  display: flex;
  align-items: center;
  gap: 7px;
}
.workspace {
  display: grid;
  grid-template-columns: 250px 1fr;
  border: 1px solid #dce0e9;
  border-radius: 10px;
  overflow: hidden;
  background: white;
}
.chapters {
  padding: 26px 18px;
  border-right: 1px solid #e1e4ec;
}
.chapters > .mono {
  margin: 0 12px 20px;
}
.chapter {
  display: flex;
  gap: 12px;
  align-items: center;
  width: 100%;
  text-align: left;
  border: 0;
  background: none;
  color: #777e91;
  padding: 15px 12px;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 5px;
  font-size: 12px;
  line-height: 1.5;
}
.chapter span {
  font: 10px monospace;
  opacity: 0.7;
}
.chapter:hover {
  background: #f4f3fa;
}
.chapter.active {
  color: #5048aa;
  background: #eeecfa;
  font-weight: 600;
}
.stage-note {
  margin: 25px 12px 0;
  border-top: 1px solid #e2e4ed;
  padding-top: 22px;
}
.stage-note .mono {
  color: #989caf;
  font-size: 9px;
}
.stage-note p {
  font-size: 12px;
  line-height: 1.8;
  color: #798093;
}
.viewer {
  min-width: 0;
  background: #f2f3f6;
  display: flex;
  flex-direction: column;
}
.browser-bar {
  height: 42px;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 18px;
  background: #f6f7fa;
  border-bottom: 1px solid #e2e5ed;
  color: #8c91a1;
}
.browser-bar > .mono:nth-child(2) {
  flex: 1;
  text-align: center;
  font-size: 9px;
  letter-spacing: 0;
}
.browser-bar > .mono:last-child {
  font-size: 8px;
}
.traffic {
  display: flex;
  gap: 5px;
}
.traffic i {
  width: 7px;
  height: 7px;
  background: #dadde5;
  border-radius: 50%;
}
.screen {
  flex: 1;
  position: relative;
  display: grid;
  place-items: center;
  background: #f6f4ec;
  min-height: 300px;
}
.screen img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 6/5;
  object-fit: cover;
  object-position: top;
}
.screen p {
  color: #777;
  font-size: 13px;
  padding: 32px;
}
.transport {
  min-height: 47px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  background: #fff;
  border-top: 1px solid #e2e5ed;
}
.transport button {
  background: #f5f6fa;
  border: 1px solid #e1e4eb;
  border-radius: 4px;
  width: 28px;
  height: 27px;
  color: #72768a;
  cursor: pointer;
}
.transport button:disabled {
  opacity: 0.35;
  cursor: default;
}
.transport > .mono {
  font-size: 10px;
  color: #808596;
}
#frame-caption {
  margin-left: 6px;
  color: #687087;
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.evidence {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}
.code-panel,
.result-panel {
  border: 1px solid #dce0e9;
  border-radius: 8px;
  padding: 19px 22px;
  background: white;
  min-width: 0;
}
.code-panel {
  background: #24283d;
  color: #c3c8dd;
  border-color: #24283d;
}
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.panel-heading > .mono {
  font-size: 9px;
  color: #8c92aa;
}
.panel-heading a {
  font-size: 10px;
  color: #9496b3;
  text-decoration: none;
}
pre {
  font:
    12px/1.75 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  margin: 20px 0 0;
}
.code-panel pre {
  max-height: 205px;
  overflow: auto;
  color: #ddd9fc;
}
.verdict {
  font-size: 17px;
  margin: 23px 0;
  color: #34775e;
  letter-spacing: -0.2px;
}
.verdict.failure {
  color: #b16c37;
}
.metrics {
  display: flex;
  gap: 38px;
  padding-bottom: 17px;
  border-bottom: 1px solid #eceef3;
}
.metrics div {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.metrics strong {
  font-weight: 500;
  font-size: 25px;
  letter-spacing: -1px;
}
.metrics span {
  font-size: 10px;
  color: #8c92a1;
}
.muted {
  color: #838a9b;
}
.result-panel > p {
  font-size: 11px;
  line-height: 1.7;
  margin-bottom: 0;
}
.provenance {
  color: #8b91a2;
  font: 9px/1.8 monospace;
  margin: 14px 0;
}
.takeaway {
  padding: 70px 0;
  max-width: 720px;
  margin: auto;
  text-align: center;
}
.takeaway > .mono {
  color: #7e77b5;
  font-size: 9px;
}
.takeaway h2 {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: -1px;
}
.takeaway p {
  font-size: 14px;
  line-height: 1.9;
  color: #7c8394;
  max-width: 570px;
  margin: auto;
}
.reproduce {
  border-top: 1px solid #dde0e9;
  padding: 45px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.reproduce .eyebrow {
  font-size: 9px;
  margin-bottom: 15px;
}
.reproduce h2 {
  font-size: 27px;
  font-weight: 400;
  letter-spacing: -0.6px;
  margin: 0 0 15px;
}
.reproduce p {
  font-size: 13px;
  line-height: 1.9;
  color: #808799;
}
.reproduce pre {
  margin: 0;
  background: #eeeff6;
  padding: 24px;
  border-radius: 7px;
  font-size: 11px;
  color: #646984;
}
.links {
  display: flex;
  gap: 25px;
  flex-wrap: wrap;
}
.links a {
  font-size: 11px;
  color: #6760b3;
  text-decoration: none;
}
.limits {
  font-size: 11px;
  line-height: 1.8;
  color: #9298a7;
  padding-bottom: 35px;
  max-width: 890px;
}
footer {
  border-top: 1px solid #dfe2ea;
  padding: 25px 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
footer .wordmark {
  font-size: 23px;
}
footer span,
footer > a:last-child {
  font-size: 10px;
  color: #858c9b;
  text-decoration: none;
}
.empty {
  padding: 70px 30px;
  text-align: center;
  border: 1px solid #dce0e9;
  border-radius: 8px;
  color: #737b8f;
  background: #fff;
}
.empty p {
  font-size: 14px;
  line-height: 1.8;
}
[hidden] {
  display: none !important;
}
@media (min-width: 1500px) {
  .intro {
    padding-top: 90px;
  }
}
@media (max-width: 850px) {
  .intro {
    gap: 30px;
    padding-top: 45px;
  }
  .intro h1 {
    font-size: 65px;
    letter-spacing: -4px;
  }
  .intro-copy > p:first-child {
    font-size: 18px;
  }
  .workspace {
    grid-template-columns: 200px 1fr;
  }
  .chapters {
    padding: 20px 10px;
  }
  .chapter {
    font-size: 11px;
    padding: 12px 8px;
  }
  .stage-note {
    margin: 20px 8px;
  }
  .metrics {
    gap: 22px;
  }
  .metrics strong {
    font-size: 22px;
  }
  .intent-strip {
    gap: 16px;
  }
  .pill {
    display: none;
  }
  .tag {
    display: none;
  }
  .screen {
    min-height: 260px;
  }
}
@media (max-width: 620px) {
  main {
    padding: 0 18px;
  }
  .topbar {
    padding: 22px 18px;
  }
  nav {
    gap: 14px;
    font-size: 11px;
  }
  .outline {
    padding: 10px;
  }
  .intro {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 42px 0 32px;
  }
  .intro h1 {
    font-size: 68px;
  }
  .intro-copy {
    padding-top: 14px;
  }
  .intro-copy .secondary {
    font-size: 14px;
  }
  .intent-strip {
    display: block;
    padding: 18px;
  }
  .intent-strip p {
    margin-top: 10px;
    line-height: 1.6;
    font-size: 14px;
  }
  .section-top {
    display: block;
    margin-top: 32px;
  }
  .section-top h2 {
    font-size: 18px;
  }
  .record-label {
    margin: 14px 0;
  }
  .workspace {
    grid-template-columns: 1fr;
  }
  .chapters {
    padding: 16px;
    border-right: 0;
    border-bottom: 1px solid #e1e4ec;
  }
  .chapters > .mono {
    margin: 0 0 12px;
  }
  #chapters {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
  }
  .chapter {
    font-size: 11px;
    padding: 10px 7px;
    margin: 0;
  }
  .stage-note {
    margin: 13px 0 0;
    padding-top: 10px;
  }
  .stage-note p {
    margin: 7px 0 0;
  }
  .screen {
    min-height: 0;
  }
  .evidence {
    grid-template-columns: 1fr;
  }
  .code-panel pre {
    max-height: 170px;
  }
  .result-panel {
    padding-bottom: 24px;
  }
  .takeaway {
    padding: 48px 0;
  }
  .takeaway h2 {
    font-size: 25px;
  }
  .reproduce {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 30px 0;
  }
  .reproduce h2 {
    font-size: 25px;
  }
  footer {
    padding: 24px 18px;
    flex-wrap: wrap;
  }
  footer span {
    display: none;
  }
  .eyebrow {
    font-size: 9px;
  }
}