@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  }

  :root {
    --paper: #efead9;
    --paper-2: #e6e0cc;
    --card: #fbfaf4;
    --card-border: rgba(34, 38, 31, 0.14);
    --sage-900: #33493f;
    --sage-800: #46685f;
    --sage-700: #5b7f76;
    --sage-500: #8aa89d;
    --ink: #22261f;
    --ink-soft: #5b6155;
    --ink-on-sage: #f3f0e4;
    --ink-on-sage-soft: rgba(243, 240, 228, 0.72);
    --accent: #c6853a;
    --accent-ink: #2a1b08;
    --accent-hover: #b0762f;
    --rule: rgba(34, 38, 31, 0.14);
    --rule-on-sage: rgba(243, 240, 228, 0.22);
    --shadow: 0 24px 48px -24px rgba(34, 38, 31, 0.4);
    --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
    --font-body: Charter, "Iowan Old Style", Palatino, Georgia, "Times New Roman", serif;
    --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  }

  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --paper: #181f1b;
      --paper-2: #121712;
      --card: #1f2721;
      --card-border: rgba(237, 234, 221, 0.12);
      --sage-900: #0d1310;
      --sage-800: #17221c;
      --sage-700: #3e5850;
      --sage-500: #7fa095;
      --ink: #ece8d9;
      --ink-soft: #b3b7a8;
      --ink-on-sage: #f0eddf;
      --ink-on-sage-soft: rgba(240, 237, 223, 0.72);
      --accent: #e0a25c;
      --accent-ink: #241505;
      --accent-hover: #eab271;
      --rule: rgba(237, 234, 221, 0.14);
      --rule-on-sage: rgba(240, 237, 223, 0.18);
      --shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.65);
    }
  }

  :root[data-theme="dark"] {
    --paper: #181f1b;
    --paper-2: #121712;
    --card: #1f2721;
    --card-border: rgba(237, 234, 221, 0.12);
    --sage-900: #0d1310;
    --sage-800: #17221c;
    --sage-700: #3e5850;
    --sage-500: #7fa095;
    --ink: #ece8d9;
    --ink-soft: #b3b7a8;
    --ink-on-sage: #f0eddf;
    --ink-on-sage-soft: rgba(240, 237, 223, 0.72);
    --accent: #e0a25c;
    --accent-ink: #241505;
    --accent-hover: #eab271;
    --rule: rgba(237, 234, 221, 0.14);
    --rule-on-sage: rgba(240, 237, 223, 0.18);
    --shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.65);
  }

  * { box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    background-image:
      radial-gradient(circle at 1px 1px, rgba(34, 38, 31, 0.05) 1px, transparent 0);
    background-size: 22px 22px;
  }

  img { max-width: 100%; height: auto; display: block; }

  a { color: inherit; }

  .lang-toggle-btn:focus-visible,
  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 3px;
  }

  html[data-lang="ru"] .en { display: none; }
  html[data-lang="en"] .ru { display: none; }

  .wrap {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 32px;
  }

  /* ---------- nav ---------- */
  .nav {
    position: sticky;
    top: 0;
    z-index: 40;
    background: var(--sage-900);
    color: var(--ink-on-sage);
    border-bottom: 1px solid var(--rule-on-sage);
  }
  .nav .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding-top: 16px;
    padding-bottom: 16px;
  }
  .brand {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
    text-decoration: none;
    color: var(--ink-on-sage);
  }
  .brand .wordmark {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.32rem;
    letter-spacing: 0.02em;
  }
  .brand .slug {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    color: var(--ink-on-sage-soft);
    margin-top: 2px;
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    font-size: 0.92rem;
  }
  .nav-links a {
    text-decoration: none;
    color: var(--ink-on-sage-soft);
    white-space: nowrap;
  }
  .nav-links a:hover { color: var(--ink-on-sage); }
  @media (max-width: 860px) {
    .nav-links { display: none; }
  }
  .nav-right { display: flex; align-items: center; gap: 16px; }

  .lang-toggle {
    display: inline-flex;
    border: 1px solid var(--rule-on-sage);
    border-radius: 999px;
    padding: 3px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
  }
  .lang-toggle-btn {
    border: none;
    background: transparent;
    color: var(--ink-on-sage-soft);
    padding: 5px 12px;
    border-radius: 999px;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    letter-spacing: inherit;
  }
  .lang-toggle-btn[aria-pressed="true"] {
    background: var(--ink-on-sage);
    color: var(--sage-900);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.04em;
    text-decoration: none;
    padding: 11px 20px;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
  }
  .btn-accent {
    background: var(--accent);
    color: var(--accent-ink);
  }
  .btn-accent:hover { background: var(--accent-hover); }
  .btn-ghost-onsage {
    border-color: var(--rule-on-sage);
    color: var(--ink-on-sage);
  }
  .btn-ghost-onsage:hover { border-color: var(--ink-on-sage-soft); }
  .btn-outline {
    border-color: var(--rule);
    color: var(--ink);
  }
  .btn-outline:hover { border-color: var(--ink-soft); }
  .nav-cta { display: none; }
  @media (min-width: 900px) { .nav-cta { display: inline-flex; } }

  /* ---------- hero ---------- */
  .hero {
    background: var(--sage-900);
    color: var(--ink-on-sage);
    padding: 64px 0 96px;
    position: relative;
    overflow: hidden;
  }
  .hero .wrap {
    display: grid;
    grid-template-columns: 1fr;
    gap: 56px;
    align-items: center;
  }
  @media (min-width: 980px) {
    .hero .wrap { grid-template-columns: 1.05fr 1fr; }
  }
  .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 14px;
  }
  .eyebrow.onsage { color: #d9b98a; }
  .hero-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2.1rem, 4vw, 3rem);
    line-height: 1.14;
    margin: 0 0 22px;
    text-wrap: balance;
    letter-spacing: -0.005em;
  }
  .hero-title .path { color: var(--accent); }
  .hero-sub {
    font-size: 1.08rem;
    color: var(--ink-on-sage-soft);
    max-width: 46ch;
    margin: 0 0 32px;
  }
  .hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
  .tag-row { display: flex; flex-wrap: wrap; gap: 10px; }
  .tag-chip {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-on-sage-soft);
    border: 1px solid var(--rule-on-sage);
    border-radius: 999px;
    padding: 5px 11px;
  }

  .hero-frame {
    transform: rotate(-1.6deg);
    transition: transform 0.4s ease;
  }
  .hero-frame:hover { transform: rotate(0deg); }
  .hero-frame .plate {
    background: var(--card);
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 10px;
    padding: 10px;
    box-shadow: var(--shadow);
  }
  .hero-frame img {
    border-radius: 5px;
    display: block;
  }
  /* ---------- section shell ---------- */
  section { padding: 88px 0; }
  .section-head { max-width: 640px; margin: 0 0 48px; }
  .section-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.7rem, 2.6vw, 2.2rem);
    margin: 0;
    text-wrap: balance;
  }

  /* ---------- process ---------- */
  .process-path {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--rule);
    border-radius: 10px;
    overflow: hidden;
    background: var(--card);
  }
  .process-step {
    flex: 1 1 260px;
    padding: 30px 28px;
    position: relative;
  }
  .process-step + .process-step { border-top: 1px solid var(--rule); }
  @media (min-width: 860px) {
    .process-step + .process-step { border-top: none; border-left: 1px solid var(--rule); }
  }
  .process-step .num {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--accent);
    display: block;
    margin-bottom: 10px;
  }
  .process-step h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin: 0 0 10px;
  }
  .process-step p { margin: 0; color: var(--ink-soft); font-size: 0.98rem; }
  .process-arrow {
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
    color: var(--ink-soft);
    font-family: var(--font-mono);
  }
  @media (min-width: 860px) {
    .process-path { align-items: center; }
    .process-arrow { display: flex; }
  }

  /* ---------- features ---------- */
  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
  }
  .feature-card {
    position: relative;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 26px 24px 24px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
  }
  .feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 30px -20px rgba(34,38,31,0.35);
  }
  .feature-card::before {
    content: "";
    position: absolute;
    top: 18px;
    left: -7px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--paper);
    border: 1px solid var(--card-border);
  }
  .feature-card .eyebrow { margin-bottom: 10px; color: var(--sage-700); }
  .feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.16rem;
    margin: 0 0 10px;
  }
  .feature-card p { margin: 0; color: var(--ink-soft); font-size: 0.96rem; }

  /* ---------- tech / install ---------- */
  .tech {
    background: var(--sage-900);
    color: var(--ink-on-sage);
  }
  .tech .wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }
  @media (min-width: 940px) {
    .tech .wrap { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); align-items: center; }
  }
  .tech h2 { color: var(--ink-on-sage); }
  .tech-copy p { color: var(--ink-on-sage-soft); max-width: 46ch; }
  .tech-note {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--ink-on-sage-soft);
    margin-top: 18px;
  }
  .code-plate {
    background: var(--sage-800);
    border: 1px solid var(--rule-on-sage);
    border-radius: 8px;
    overflow: hidden;
  }
  .code-plate .bar {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--rule-on-sage);
  }
  .code-plate .bar span {
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--rule-on-sage);
  }
  .code-plate pre {
    margin: 0;
    padding: 20px 22px 24px;
    font-family: var(--font-mono);
    font-size: 0.84rem;
    line-height: 1.75;
    overflow-x: auto;
    color: var(--ink-on-sage);
  }
  .code-plate .c { color: var(--ink-on-sage-soft); font-style: italic; }
  .code-plate .k { color: var(--accent); }
  .code-plate[hidden] { display: none; }

  .run-toggle {
    display: inline-flex;
    border: 1px solid var(--rule-on-sage);
    border-radius: 999px;
    padding: 3px;
    margin-bottom: 14px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.04em;
  }
  .run-toggle-btn {
    border: none;
    background: transparent;
    color: var(--ink-on-sage-soft);
    padding: 6px 16px;
    border-radius: 999px;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    letter-spacing: inherit;
  }
  .run-toggle-btn[aria-pressed="true"] {
    background: var(--ink-on-sage);
    color: var(--sage-900);
  }

  /* ---------- cta band ---------- */
  .cta-band {
    text-align: center;
  }
  .cta-band .wrap { max-width: 680px; }
  .cta-band h2 { margin: 0 0 16px; }
  .cta-band p { color: var(--ink-soft); margin: 0 0 32px; }
  .cta-band .hero-ctas { justify-content: center; }
  .cta-band .tag-row { justify-content: center; margin-top: 28px; }
  .cta-band .tag-chip { color: var(--ink-soft); border-color: var(--rule); }

  /* ---------- footer ---------- */
  footer {
    background: var(--sage-900);
    color: var(--ink-on-sage-soft);
    padding: 48px 0 40px;
    font-size: 0.9rem;
  }
  footer .wrap {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 24px;
  }
  footer .foot-brand { color: var(--ink-on-sage-soft); }
  footer .foot-links { display: flex; gap: 22px; flex-wrap: wrap; }
  footer .foot-links a { text-decoration: none; color: var(--ink-on-sage-soft); }
  footer .foot-links a:hover { color: var(--ink-on-sage); }