:root {
  --bg: #e3e5e4;
  --fg: #48494b;
  --fg-soft: rgba(72, 73, 75, 0.68);
  --fg-faint: rgba(72, 73, 75, 0.16);
  --fg-quiet: rgba(72, 73, 75, 0.08);
  --bg-rgb: 227, 229, 228;
  --fg-rgb: 72, 73, 75;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: "Courier New", Courier, monospace;
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  image-rendering: pixelated;
}

button,
code {
  font: inherit;
}

button {
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  display: flex;
  min-height: 100dvh;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--fg-faint);
  background: rgba(var(--bg-rgb), 0.88);
  padding: 0 24px;
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  image-rendering: pixelated;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--fg-faint);
  padding: 8px 10px;
  color: var(--fg-soft);
  font-size: 12px;
}

.language-switch button {
  border: 0;
  background: transparent;
  cursor: pointer;
  opacity: 0.55;
  padding: 0;
}

.language-switch button:hover,
.language-switch button.active {
  opacity: 1;
}

.landing-page {
  width: min(800px, 100%);
  margin: 0 auto;
  padding: 44px 24px 72px;
}

.landing-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 42px 0 34px;
  text-align: center;
}

.subtitle {
  margin: 0 0 18px;
  color: var(--fg-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.landing-hero h1 {
  margin: 0 0 18px;
  font-size: 72px;
  line-height: 0.95;
  letter-spacing: 0;
}

.description {
  max-width: 560px;
  margin: 0 auto;
  color: var(--fg-soft);
  font-size: 15px;
  line-height: 1.75;
}

.copy-panel-button {
  border: 1px solid var(--fg);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
  transition: background-color 150ms ease, color 150ms ease, opacity 150ms ease;
}

.copy-panel-button:hover {
  background: var(--fg);
  color: var(--bg);
}

.landing-section {
  border-top: 1px solid var(--fg-faint);
  padding: 56px 0;
}

.landing-section h2 {
  margin: 0 0 18px;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: 0;
}

.landing-section > p {
  max-width: 640px;
  margin: 0 0 24px;
  color: var(--fg-soft);
  font-size: 14px;
  line-height: 1.75;
}

.copy-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
  border: 1px solid var(--fg);
  background: rgba(var(--fg-rgb), 0.03);
}

.copy-panel code {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  gap: 0;
  overflow-wrap: anywhere;
  padding: 18px;
  color: var(--fg);
  font-size: 13px;
  line-height: 1.65;
}

.skill-url {
  overflow-wrap: anywhere;
}

.copy-panel-button {
  min-width: 116px;
  border-width: 0 0 0 1px;
  padding: 0 18px;
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.steps-list li {
  min-height: 184px;
  border: 1px solid var(--fg-faint);
  padding: 22px;
}

.step-index {
  display: block;
  margin-bottom: 28px;
  color: var(--fg-soft);
  font-size: 12px;
}

.steps-list h3 {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: 0;
}

.steps-list p {
  margin: 0;
  color: var(--fg-soft);
  font-size: 13px;
  line-height: 1.65;
}

.faq-list {
  display: grid;
  border-top: 1px solid var(--fg-faint);
}

.faq-list details {
  border-bottom: 1px solid var(--fg-faint);
}

.faq-list summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  float: right;
  content: "+";
  padding-left: 16px;
}

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

.faq-list p {
  max-width: 680px;
  margin: 0;
  padding: 0 0 22px;
  color: var(--fg-soft);
  font-size: 14px;
  line-height: 1.75;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--fg-faint);
  padding: 24px;
  color: var(--fg-soft);
  font-size: 12px;
}

@media (max-width: 760px) {
  .topbar {
    min-height: 60px;
    padding: 0 16px;
  }

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

  .landing-page {
    padding: 28px 16px 56px;
  }

  .landing-hero {
    padding: 32px 0 34px;
  }

  .landing-hero h1 {
    font-size: 46px;
  }

  .description {
    font-size: 14px;
  }

  .landing-section {
    padding: 44px 0;
  }

  .copy-panel {
    grid-template-columns: 1fr;
  }

  .copy-panel-button {
    min-height: 46px;
    border-width: 1px 0 0;
  }

  .steps-list {
    grid-template-columns: 1fr;
  }

  .steps-list li {
    min-height: 0;
  }

  .step-index {
    margin-bottom: 18px;
  }

  .site-footer {
    flex-direction: column;
  }
}