:root {
  --ink: #171915;
  --paper: #f4f1e9;
  --muted: #696b64;
  --line: #c9c6bc;
  --soft: #eae7de;
  --green: #aee635;
  --orange: #ef5b38;
  --mono: "SFMono-Regular", "Cascadia Code", "Liberation Mono", monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--ink);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  line-height: 1.5;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}

a:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.shell {
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: min(1180px, 100%);
  min-height: 100svh;
  margin: 0 auto;
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background:
    linear-gradient(rgba(23, 25, 21, 0.025) 1px, transparent 1px), var(--paper);
  background-size: 100% 32px;
}

header,
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  padding: 0 clamp(22px, 4vw, 48px);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

header {
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
  text-decoration: none;
  text-transform: none;
}

.brand span {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 6px;
  border: 1px solid var(--ink);
  background: var(--green);
}

nav {
  display: flex;
  gap: 24px;
}

nav a {
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

main {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(390px, 0.95fr);
  min-height: 0;
}

.intro,
.reference {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(42px, 6.5vh, 72px) clamp(26px, 5vw, 64px);
}

.intro {
  border-right: 1px solid var(--line);
}

.status {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status span {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--orange);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 700px;
  margin-bottom: 24px;
  font-family: var(--serif);
  font-size: clamp(3.25rem, 6vw, 5.8rem);
  font-weight: 500;
  line-height: 0.92;
  letter-spacing: -0.055em;
  overflow-wrap: anywhere;
}

h1 span {
  display: block;
  color: var(--muted);
  font-size: 0.5em;
  font-style: italic;
  letter-spacing: -0.025em;
}

.summary {
  max-width: 620px;
  margin-bottom: 28px;
  color: #41433e;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.45;
}

.install {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 530px;
  padding: 15px 18px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #f5f2e9;
  box-shadow: 5px 5px 0 var(--green);
  font-size: clamp(0.72rem, 1.4vw, 0.85rem);
  white-space: nowrap;
}

.prompt {
  color: var(--green);
}

.actions {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 30px;
  font-size: 0.73rem;
  font-weight: 700;
}

.actions .primary {
  padding: 10px 14px;
  border: 1px solid var(--ink);
  background: var(--green);
  text-decoration: none;
}

.reference {
  gap: clamp(20px, 3.2vh, 32px);
  background: rgba(234, 231, 222, 0.45);
}

.block h2 {
  margin-bottom: 13px;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.features ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 22px;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.features li {
  position: relative;
  padding: 9px 0 9px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 0.72rem;
}

.features li::before {
  position: absolute;
  left: 0;
  color: var(--orange);
  content: "+";
  font-weight: 700;
}

.modes article {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 16px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.modes article:last-child {
  border-bottom: 1px solid var(--line);
}

.mode {
  color: var(--muted);
  font-size: 0.64rem;
  font-weight: 700;
}

.modes h3 {
  margin-bottom: 3px;
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.2;
}

.modes p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.69rem;
  line-height: 1.45;
}

.rankworker-note {
  margin: 0;
  padding: 14px 16px;
  border-left: 4px solid var(--orange);
  background: var(--soft);
  font-family: var(--serif);
  font-size: 0.9rem;
  line-height: 1.4;
}

footer {
  min-height: 45px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.63rem;
}

@media (max-width: 820px) {
  main {
    grid-template-columns: 1fr;
  }

  .intro {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .intro,
  .reference {
    padding: 54px clamp(22px, 7vw, 56px);
  }
}

@media (max-width: 520px) {
  header,
  footer {
    gap: 18px;
    min-height: 54px;
  }

  .brand {
    font-size: 0;
  }

  .brand span {
    margin: 0;
    font-size: 0.72rem;
  }

  nav {
    gap: 16px;
  }

  h1 {
    font-size: clamp(3rem, 17vw, 4.4rem);
  }

  .install {
    overflow-x: auto;
  }

  .actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 15px;
  }

  .features ul {
    grid-template-columns: 1fr;
  }

  .modes article {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}