:root {
  --bg: #f6f5f0;
  --surface: #fff;
  --surface-alt: #eef2ed;
  --surface-hover: #e5ebe3;
  --border: #d8ddd5;
  --border-hover: #a6b9a7;
  --text: #17251e;
  --text-secondary: #516057;
  --text-tertiary: #68766d;
  --accent: #176a46;
  --accent-hover: #0d5133;
  --success: #176a46;
  --error: #b94037;
  --warning: #9c6b18;
  --bg-rgb: 246, 245, 240;
  --accent-rgb: 23, 106, 70;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  line-height: 1.75;
  letter-spacing: 0.02em;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
a {
  outline-offset: 4px;
}
a:focus-visible {
  outline: 3px solid var(--accent);
}
.wrap {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}
.skip-link {
  position: absolute;
  top: -5rem;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--surface);
  z-index: 10;
}
.skip-link:focus {
  top: 1rem;
}
.header {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 1.1rem;
}
.brand-mark {
  display: block;
  width: 31px;
  height: 31px;
  flex: none;
}
.header nav {
  display: flex;
  gap: 1.8rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  font-weight: 600;
}
.header nav a,
.text-link,
.footer a {
  transition: color 0.2s;
}
.header nav a:hover,
.text-link:hover,
.footer a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: 5%;
  min-height: 650px;
  padding-top: 70px;
  padding-bottom: 88px;
}
.hero-copy {
  animation: arrive 0.65s ease both;
}
.eyebrow {
  margin: 0 0 1.3rem;
  color: var(--accent);
  font:
    700 0.73rem ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  letter-spacing: 0.12em;
}
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1,
h2 {
  letter-spacing: -0.065em;
  line-height: 1.13;
}
h1 {
  font-size: clamp(3.8rem, 6.2vw, 5.5rem);
  font-weight: 750;
  margin-bottom: 1.5rem;
}
h1 em {
  font-style: normal;
  color: var(--accent);
}
.lead {
  max-width: 35rem;
  color: var(--text-secondary);
  font-size: 1.08rem;
  line-height: 1.85;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 2rem 0 1.2rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 48px;
  padding: 0.65rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: 100px;
  font-size: 0.91rem;
  font-weight: 700;
  transition:
    transform 0.2s,
    background 0.2s,
    border-color 0.2s,
    color 0.2s;
}
.button:hover {
  transform: translateY(-2px);
}
.button:active {
  transform: translateY(0);
}
.primary {
  background: var(--accent);
  color: var(--surface);
}
.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.secondary {
  background: transparent;
  color: var(--accent);
}
.secondary:hover {
  background: var(--surface-hover);
}
.hero-note {
  color: var(--text-tertiary);
  font-size: 0.78rem;
}
.terminal {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border-hover);
  border-radius: 16px;
  background: var(--text);
  color: var(--surface);
  box-shadow: 14px 16px 0 var(--surface-alt);
  animation: arrive 0.8s 0.12s ease both;
}
.terminal-top,
.terminal-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.1rem;
  border-bottom: 1px solid rgba(var(--bg-rgb), 0.15);
  color: #b6c8ba;
  font:
    12px ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
}
.terminal-dots {
  color: #a4bca7;
  letter-spacing: 0.15em;
}
.terminal-body {
  padding: 1.45rem 1.2rem;
  font:
    13px/1.8 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  overflow-wrap: anywhere;
}
.terminal-body p {
  margin-bottom: 0.65rem;
}
.terminal-muted {
  color: #a7bcae;
}
.prompt {
  color: #9fdfb3;
}
.terminal-diff {
  margin: 1rem 0 !important;
  padding: 0.55rem 0.75rem;
  border-left: 2px solid #81c993;
  background: rgba(var(--accent-rgb), 0.35);
  color: #dbf7e1;
}
.terminal-done {
  color: #9fdfb3;
}
.terminal-foot {
  border-bottom: 0;
  border-top: 1px solid rgba(var(--bg-rgb), 0.15);
  font-size: 11px;
}
.rule {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 1rem;
  align-items: center;
  padding: 1.8rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.rule p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.91rem;
}
.rule strong {
  font-size: 0.87rem;
}
.section {
  padding-top: 110px;
  padding-bottom: 110px;
}
.section-heading {
  max-width: 670px;
  margin-bottom: 3rem;
}
.section-heading h2,
.install-grid h2,
.closing h2 {
  font-size: clamp(2.4rem, 4.2vw, 3.6rem);
  font-weight: 700;
  margin-bottom: 1rem;
}
.section-heading > p:last-child,
.install-grid > div:first-child > p:not(.eyebrow),
.closing > p:not(.eyebrow) {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}
.concept-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}
.concept {
  padding-top: 1.25rem;
  border-top: 2px solid var(--accent);
}
.concept span,
.flow-number {
  color: var(--accent);
  font: 700 0.75rem ui-monospace, SFMono-Regular, Consolas, monospace;
}
.concept h3,
.flow-list h3 {
  margin: 0.5rem 0;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
}
.concept p,
.flow-list p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}
.flow-section {
  padding-block: 100px;
  background: var(--surface-alt);
  border-block: 1px solid var(--border);
}
.flow-list {
  max-width: 860px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.flow-list li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1.1rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border-hover);
}
.flow-list li:last-child {
  border-bottom: 1px solid var(--border-hover);
}
.flow-list code {
  display: inline-block;
  margin-top: 0.65rem;
  color: var(--accent);
  font-size: 0.78rem;
  overflow-wrap: anywhere;
}
.flow-note {
  max-width: 860px;
  margin: 1.5rem 0 0;
  font-weight: 600;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.feature {
  min-width: 0;
  padding: 1.65rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  transition:
    border-color 0.2s,
    transform 0.2s;
}
.feature:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.feature-number {
  color: var(--accent);
  font:
    700 0.7rem ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  letter-spacing: 0.1em;
}
.feature h3 {
  font-size: 1.3rem;
  letter-spacing: -0.03em;
  margin: 1rem 0 0.6rem;
}
.feature p {
  min-height: 6.3rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}
.feature a {
  color: var(--accent);
  font:
    12px ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  overflow-wrap: anywhere;
}
.feature a:hover,
.reading-list a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.constraint {
  margin: 1.4rem 0 0;
  color: var(--text-tertiary);
  font-size: 0.82rem;
}
.reading {
  padding-top: 0;
}
.reading-list {
  max-width: 860px;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--border);
}
.reading-list li {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.reading-list span {
  color: var(--text-secondary);
}
.reading-list a {
  color: var(--accent);
  font-weight: 700;
}
.install-section {
  background: var(--surface-alt);
  border-block: 1px solid var(--border);
}
.install-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 8%;
  padding-top: 100px;
  padding-bottom: 100px;
}
.install-grid > div:first-child > p:not(.eyebrow) {
  max-width: 27rem;
}
.text-link {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
}
.install-steps {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border-hover);
}
.install-steps > div {
  display: grid;
  gap: 0.5rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border-hover);
}
.install-steps span {
  color: var(--text-tertiary);
  font:
    700 0.73rem ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
}
.install-steps code {
  display: block;
  padding: 0.7rem 0.9rem;
  border-radius: 6px;
  background: var(--text);
  color: #d9f3df;
  font:
    13px/1.7 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  overflow-wrap: anywhere;
}
.install-steps small {
  color: var(--text-secondary);
}
.install-steps > p {
  margin: 1rem 0 0;
  color: var(--text-tertiary);
  font-size: 0.78rem;
}
.install-steps > p code {
  display: inline;
  padding: 0;
  background: none;
  color: var(--accent);
  font-size: inherit;
}
.closing {
  max-width: 760px;
  padding-top: 112px;
  padding-bottom: 112px;
  text-align: center;
}
.closing p:not(.eyebrow) {
  margin: 0 auto 1.8rem;
  max-width: 610px;
}
.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--text-tertiary);
  font-size: 0.8rem;
}
@keyframes arrive {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (max-width: 760px) {
  .wrap {
    width: min(100% - 36px, 560px);
  }
  .header {
    min-height: 76px;
    flex-wrap: wrap;
    padding-block: 1rem;
  }
  .header nav {
    gap: 1rem;
    font-size: 0.77rem;
  }
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    gap: 2rem;
    padding-top: 64px;
    padding-bottom: 70px;
  }
  h1 {
    font-size: clamp(3.4rem, 12vw, 4.5rem);
  }
  .terminal {
    box-shadow: 7px 8px 0 var(--surface-alt);
  }
  .rule {
    grid-template-columns: 1fr 1fr;
  }
  .rule p {
    grid-column: 1/-1;
  }
  .section {
    padding-top: 75px;
    padding-bottom: 75px;
  }
  .concept-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .flow-section {
    padding-block: 75px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .feature p {
    min-height: 0;
  }
  .reading {
    padding-top: 0;
  }
  .install-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 75px;
    padding-bottom: 75px;
  }
  .closing {
    padding-top: 80px;
    padding-bottom: 80px;
  }
}
@media (max-width: 420px) {
  h1 {
    font-size: 2.75rem;
  }
  .header {
    align-items: flex-start;
  }
  .header nav {
    width: 100%;
  }
  .hero-actions .button {
    flex: 1;
  }
  .rule {
    gap: 0.75rem;
  }
  .rule strong {
    font-size: 0.8rem;
  }
  .terminal-body {
    font-size: 12px;
  }
  .footer {
    flex-wrap: wrap;
  }
  .concept-grid {
    grid-template-columns: 1fr;
  }
  .reading-list li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}