:root {
  --paper: #f4f1ea;
  --ink: #1c1915;
  --body: #3a342c;
  --muted: #6d655b;
  --line: #ddd6c8;
  --card: #fffdf8;
  --accent: #8c3d22;
  --max: 1080px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: "Cascadia Mono", "Sarasa Mono SC", Consolas, "Source Han Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  color: var(--body);
  background: var(--paper);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

img { display: block; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(244, 241, 234, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.top__bar {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand strong { font-size: 16px; font-weight: 700; letter-spacing: 0.01em; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 12px; }

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
}

.nav a:hover { color: var(--accent); }

.nav__go {
  padding: 8px 12px;
  border: 1px solid var(--ink);
  border-radius: 4px;
}

.nav__go:hover {
  background: var(--ink);
  color: var(--paper);
}

.menu {
  display: none;
  margin-left: auto;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  border-radius: 4px;
  padding: 6px 12px;
  font: inherit;
  font-size: 14px;
}

.hero { padding: 72px 0 36px; }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 48px;
  align-items: end;
}

.kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 0.04em;
}

h1, h2, h3 { color: var(--ink); font-weight: 700; }

h1 {
  margin: 0;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.lead {
  max-width: 38em;
  margin: 22px 0 0;
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 16px;
  border-radius: 4px;
  text-decoration: none;
  font-size: 15px;
}

.btn--solid { background: var(--ink); color: #f7f4ee; }
.btn--solid:hover { background: #000; }
.btn--line { border: 1px solid var(--ink); color: var(--ink); }
.btn--line:hover { background: #ebe6dc; }

.aside {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.aside a { color: var(--ink); }

.board {
  margin: 0;
  padding: 22px 22px 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.board__label {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.board ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.board li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.board li span {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
}

.board b { display: block; color: var(--ink); font-size: 16px; }
.board p { margin: 4px 0 0; font-size: 14px; line-height: 1.6; }

.band { padding: 72px 0; }
.band--plain { background: #ebe6dc; }

.head { max-width: 40em; margin-bottom: 28px; }
.head h2 { margin: 0; font-size: clamp(28px, 3vw, 36px); letter-spacing: -0.03em; line-height: 1.2; }
.head p { margin: 10px 0 0; }

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin: 0;
  padding: 28px 0 0;
  border-top: 1px solid var(--line);
}

.steps span {
  display: block;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.steps h3 { margin: 10px 0 8px; font-size: 20px; }
.steps p { margin: 0; font-size: 15px; }

.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}

.specs article {
  padding: 22px 28px 22px 0;
  border-bottom: 1px solid var(--line);
}

.specs article:nth-child(odd) { padding-right: 36px; }
.specs article:nth-child(even) {
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.specs h3 { margin: 0 0 6px; font-size: 18px; }
.specs p { margin: 0; font-size: 15px; }

.entries { display: grid; gap: 12px; }

.entries a {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px 18px;
  text-decoration: none;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.entries a:hover { border-color: var(--ink); }
.entries span { color: var(--accent); font-size: 14px; }
.entries strong { color: var(--ink); font-size: 17px; font-weight: 600; }
.entries em { font-style: normal; font-size: 14px; color: var(--ink); }

.packs { display: grid; gap: 12px; }

.packs article {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.packs h3 { margin: 0; font-size: 20px; }
.packs p { margin: 4px 0; font-size: 15px; }
.packs code {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}

.fine { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
.fine a, .foot a { color: var(--ink); }

.foot {
  border-top: 1px solid var(--line);
  padding: 22px 0 32px;
  color: var(--muted);
  font-size: 14px;
}

.foot__row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.foot p { margin: 0; display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .brand { margin-right: 12px; }
  .menu { display: inline-flex !important; flex: none; }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 72px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 16px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }

  .top.is-open .nav { display: flex; }

  .nav a {
    padding: 12px 0;
    border-top: 1px solid var(--line);
  }

  .nav__go {
    margin-top: 8px;
    text-align: center;
  }

  .hero { padding-top: 40px; }
  .hero__grid,
  .steps,
  .specs { grid-template-columns: 1fr; }

  .specs article,
  .specs article:nth-child(odd),
  .specs article:nth-child(even) {
    padding: 18px 0;
    border-left: 0;
  }

  .entries a,
  .packs article {
    grid-template-columns: 1fr;
    display: grid;
    align-items: start;
  }

  .wrap { width: min(var(--max), calc(100% - 32px)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}