:root {
  color-scheme: dark;
  --ink: #f0f3ec;
  --muted: #9ba49e;
  --muted-strong: #bdc4bf;
  --canvas: #0c0f0e;
  --canvas-raised: #101412;
  --panel: #151a17;
  --panel-soft: #181e1a;
  --line: #2b332e;
  --line-strong: #424d46;
  --acid: #c8ff63;
  --acid-deep: #99cc3d;
  --oxide: #ff855f;
  --cyan: #61d8dd;
  --error: #ff806f;
  --warning: #ffc75c;
  --success: #a9e85c;
  --radius: 18px;
  --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 78% 4%, rgb(97 216 221 / 8%), transparent 24rem),
    radial-gradient(circle at 5% 26%, rgb(200 255 99 / 5%), transparent 28rem),
    var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
select,
textarea {
  font: inherit;
}

a {
  color: inherit;
}

button,
select {
  touch-action: manipulation;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: 7px;
  background: var(--acid);
  color: #10140d;
  font-weight: 750;
  transform: translateY(-180%);
}

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

.site-header,
.hero,
.playground,
.project-note,
.site-footer,
.offline-notice {
  width: min(100% - 40px, 1440px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  min-height: 86px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background:
    linear-gradient(135deg, transparent 46%, rgb(200 255 99 / 25%) 47% 52%,
    transparent 53%),
    var(--panel);
  box-shadow: inset 0 0 0 3px var(--canvas);
  color: var(--acid);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 800;
}

.brand-name {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-name span {
  color: var(--oxide);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.build-chip {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted-strong);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.build-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgb(97 216 221 / 10%);
}

.github-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted-strong);
  font-size: 0.83rem;
  font-weight: 650;
  text-decoration: none;
}

.github-link span {
  color: var(--acid);
}

.github-link:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  min-height: 610px;
  grid-template-columns: minmax(0, 1.6fr) minmax(250px, 0.55fr);
  align-items: end;
  gap: clamp(3rem, 8vw, 9rem);
  padding: clamp(5rem, 10vw, 9.5rem) 0 clamp(4.5rem, 8vw, 7.5rem);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0 0 1.8rem;
  color: var(--acid);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 1px;
  background: currentColor;
  content: "";
}

.pre-parity {
  padding: 0.2rem 0.45rem;
  border: 1px solid rgb(255 133 95 / 45%);
  border-radius: 4px;
  color: var(--oxide);
  letter-spacing: 0.08em;
}

.hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(3.7rem, 8.6vw, 8.6rem);
  font-weight: 680;
  letter-spacing: -0.07em;
  line-height: 0.84;
}

.hero h1 span {
  color: transparent;
  -webkit-text-stroke: 1px var(--muted);
}

.hero-summary {
  max-width: 660px;
  margin: 2.25rem 0 0;
  color: var(--muted-strong);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  line-height: 1.7;
}

.hero-facts {
  margin: 0;
  border-top: 1px solid var(--line);
}

.hero-facts div {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.hero-facts dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 650;
}

.offline-notice {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding: 0.8rem 1rem;
  border: 1px solid rgb(255 199 92 / 38%);
  border-radius: 10px;
  background: rgb(255 199 92 / 8%);
  color: #ffe0a0;
  font-size: 0.83rem;
}

.offline-notice[hidden] {
  display: none;
}

.offline-icon {
  display: grid;
  width: 1.5rem;
  height: 1.5rem;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--warning);
  color: #271a00;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 900;
}

.playground {
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    linear-gradient(135deg, rgb(255 255 255 / 2%), transparent 32%),
    var(--canvas-raised);
  box-shadow: 0 38px 100px rgb(0 0 0 / 32%);
}

.playground-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.section-index,
.panel-kicker {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.playground-heading h2,
.project-note h2 {
  margin: 0.45rem 0 0;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 630;
  letter-spacing: -0.04em;
}

.engine-status {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgb(0 0 0 / 16%);
  color: var(--muted-strong);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.status-light {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
}

.status-light.is-loading {
  background: var(--warning);
  box-shadow: 0 0 0 4px rgb(255 199 92 / 10%);
  animation: status-pulse 1.5s ease-in-out infinite;
}

.status-light.is-ready {
  background: var(--success);
  box-shadow: 0 0 0 4px rgb(169 232 92 / 10%);
}

.status-light.is-running {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgb(97 216 221 / 10%);
  animation: status-pulse 0.8s ease-in-out infinite;
}

.status-light.is-error {
  background: var(--error);
  box-shadow: 0 0 0 4px rgb(255 128 111 / 10%);
}

@keyframes status-pulse {
  50% {
    opacity: 0.42;
  }
}

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.panel {
  min-width: 0;
  background: var(--panel);
}

.panel-header {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem 0.9rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.panel-title-group h3 {
  margin: 0.15rem 0 0;
  font-family: var(--mono);
  font-size: 0.79rem;
  font-weight: 650;
}

.example-picker {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.example-picker select {
  max-width: 175px;
  min-height: 38px;
  padding: 0.42rem 2rem 0.42rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  outline: 0;
  background: var(--panel-soft);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0;
  text-transform: none;
}

.example-picker select:focus-visible {
  border-color: var(--acid);
  box-shadow: 0 0 0 3px rgb(200 255 99 / 14%);
}

.editor-shell {
  position: relative;
  display: grid;
  min-height: 430px;
  grid-template-columns: 50px minmax(0, 1fr);
  background:
    linear-gradient(90deg, rgb(255 255 255 / 1.5%) 1px, transparent 1px) 0 0 /
    4rem 4rem,
    #111512;
}

.editor-gutter {
  display: flex;
  justify-content: center;
  padding-top: 1.2rem;
  border-right: 1px solid var(--line);
  color: #637068;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
}

#source-editor {
  width: 100%;
  min-height: 430px;
  resize: vertical;
  padding: 1.15rem 1.25rem;
  border: 0;
  outline: 0;
  background: transparent;
  color: #e8eee9;
  caret-color: var(--acid);
  font-family: var(--mono);
  font-size: clamp(0.78rem, 1.1vw, 0.88rem);
  line-height: 1.75;
  tab-size: 2;
}

#source-editor:focus-visible {
  box-shadow: inset 0 0 0 1px var(--acid);
}

.panel-footer {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1rem 0.65rem 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.61rem;
}

.editor-footer p {
  display: flex;
  align-items: center;
  gap: 0.24rem;
  margin: 0;
}

kbd {
  min-width: 1.3rem;
  padding: 0.1rem 0.28rem;
  border: 1px solid var(--line-strong);
  border-bottom-color: #59655e;
  border-radius: 4px;
  background: #1d231f;
  color: var(--muted-strong);
  font: inherit;
  text-align: center;
}

.result-state {
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.result-state.is-idle {
  color: var(--muted);
}

.result-state.is-running {
  border-color: rgb(97 216 221 / 35%);
  color: var(--cyan);
}

.result-state.is-success {
  border-color: rgb(169 232 92 / 35%);
  color: var(--success);
}

.result-state.is-error {
  border-color: rgb(255 128 111 / 35%);
  color: var(--error);
}

.result-region {
  min-height: 430px;
  padding: clamp(1.25rem, 3vw, 2rem);
  background:
    radial-gradient(circle at 100% 0, rgb(200 255 99 / 4%), transparent 17rem),
    var(--panel-soft);
}

.result-empty {
  display: grid;
  min-height: 350px;
  place-content: center;
  justify-items: center;
  color: var(--muted);
  text-align: center;
}

.result-empty p {
  max-width: 240px;
  margin: 1rem 0 0;
  font-size: 0.78rem;
  line-height: 1.6;
}

.prompt-glyph {
  color: var(--line-strong);
  font-family: var(--mono);
  font-size: 2.4rem;
  font-weight: 500;
}

.result-content {
  min-width: 0;
}

.result-label {
  margin: 0 0 1rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.result-value {
  min-height: 118px;
  max-height: 190px;
  overflow: auto;
  margin: 0;
  color: var(--acid);
  font-family: var(--mono);
  font-size: clamp(1.15rem, 2.2vw, 1.8rem);
  font-weight: 600;
  line-height: 1.35;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.result-content.is-error .result-label,
.result-content.is-error .result-value {
  color: var(--error);
}

.result-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 1.5rem 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.result-meta div {
  padding: 0.8rem 0;
}

.result-meta div + div {
  padding-left: 1rem;
  border-left: 1px solid var(--line);
}

.result-meta dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-meta dd {
  margin: 0.2rem 0 0;
  color: var(--muted-strong);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.result-details {
  margin-top: 1rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
}

.result-details summary {
  width: max-content;
  min-height: 32px;
  cursor: pointer;
  list-style-position: outside;
  line-height: 32px;
}

.result-details pre {
  max-height: 110px;
  overflow: auto;
  margin: 0.35rem 0 0;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgb(0 0 0 / 18%);
  color: var(--muted-strong);
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.output-footer span:last-child::before {
  color: var(--line-strong);
  content: "·";
  margin-right: 0.55rem;
}

.playground-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 1.25rem;
}

.playground-actions > p {
  max-width: 550px;
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
}

.action-buttons {
  display: flex;
  flex: 0 0 auto;
  gap: 0.65rem;
}

.button {
  min-height: 46px;
  padding: 0.68rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 740;
}

.button:focus-visible,
.github-link:focus-visible,
.brand:focus-visible,
.site-footer a:focus-visible {
  outline: 2px solid var(--acid);
  outline-offset: 3px;
}

.button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.button-secondary {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--muted-strong);
}

.button-secondary:hover:not(:disabled) {
  border-color: var(--muted);
  color: var(--ink);
}

.button-primary {
  display: inline-flex;
  min-width: 136px;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  border: 1px solid var(--acid);
  background: var(--acid);
  color: #11150d;
  box-shadow: 0 8px 25px rgb(200 255 99 / 8%);
}

.button-primary:hover:not(:disabled) {
  background: #d5ff85;
}

.button-key {
  font-family: var(--mono);
  font-size: 0.65rem;
  opacity: 0.58;
}

.project-note {
  padding: clamp(6rem, 12vw, 11rem) 0;
}

.project-note-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(300px, 1fr);
  gap: clamp(3rem, 10vw, 10rem);
  margin-top: 1.8rem;
}

.project-note h2 {
  max-width: 470px;
  margin: 0;
  font-size: clamp(2.7rem, 5.5vw, 5.8rem);
  line-height: 0.95;
}

.project-note-copy {
  padding-top: 0.4rem;
  border-top: 1px solid var(--line);
}

.project-note-copy p {
  margin: 0;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted-strong);
  line-height: 1.75;
}

.site-footer {
  display: flex;
  min-height: 110px;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted-strong);
  text-decoration: none;
}

.site-footer a span {
  color: var(--acid);
}

@media (max-width: 900px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    align-items: initial;
    gap: 4rem;
    padding-top: 6rem;
  }

  .hero-facts {
    max-width: 520px;
  }

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

  .output-panel {
    border-top: 1px solid var(--line);
  }

  .project-note-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .project-note-copy {
    max-width: 650px;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .playground,
  .project-note,
  .site-footer,
  .offline-notice {
    width: min(100% - 24px, 1440px);
  }

  .site-header {
    min-height: 72px;
  }

  .build-chip {
    display: none;
  }

  .github-link {
    font-size: 0.75rem;
  }

  .hero {
    gap: 3rem;
    padding: 5rem 0 4.5rem;
  }

  .hero h1 {
    font-size: clamp(3.25rem, 17vw, 5rem);
    line-height: 0.9;
  }

  .hero-summary {
    margin-top: 1.75rem;
    font-size: 0.95rem;
  }

  .playground {
    width: 100%;
    padding: 1rem 0;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .playground-heading,
  .playground-actions {
    padding-inline: 1rem;
  }

  .playground-heading {
    align-items: start;
    flex-direction: column;
    gap: 1rem;
  }

  .workbench {
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .panel-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .example-picker {
    width: 100%;
    justify-content: space-between;
  }

  .example-picker select {
    max-width: min(70vw, 260px);
  }

  .editor-shell {
    min-height: 350px;
    grid-template-columns: 38px minmax(0, 1fr);
  }

  #source-editor {
    min-height: 350px;
    padding: 1rem;
  }

  .result-region {
    min-height: 350px;
  }

  .result-empty {
    min-height: 270px;
  }

  .panel-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }

  .output-footer {
    flex-direction: row;
  }

  .playground-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 1rem;
  }

  .action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .button {
    justify-content: center;
  }

  .project-note {
    padding-block: 6rem;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0.4rem;
  }
}

@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;
  }
}