:root {
  --paper: #f5f1e8;
  --paper-deep: #ece7da;
  --ink: #262a22;
  --dim: #82867a;
  --moss: #2e6b41;
  --hair: rgba(38, 42, 34, 0.14);
  --pad: clamp(20px, 4vw, 56px);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scrollbar-width: thin; background: var(--paper); scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Newsreader", Georgia, serif;
  font-size: 18px;
  line-height: 1.72;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 90% 55% at 50% -10%, rgba(46, 107, 65, 0.05), transparent),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='0.028'/%3E%3C/svg%3E");
}
::selection { background: rgba(46, 107, 65, 0.18); }
a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--hair); transition: color 0.25s, border-color 0.25s; }
a:hover { color: var(--moss); border-color: var(--moss); }

.kanji {
  position: fixed; top: 50%; right: clamp(14px, 2.6vw, 40px); translate: 0 -50%;
  writing-mode: vertical-rl; font-family: "Noto Serif JP", serif;
  font-size: clamp(16px, 1.8vw, 22px); letter-spacing: 0.55em;
  color: rgba(46, 107, 65, 0.22); pointer-events: none; z-index: 1;
}
@media (max-width: 720px) { .kanji { display: none; } }

header {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: clamp(18px, 3.5vh, 36px) var(--pad);
}
.brand, .nav { font-family: "IBM Plex Mono", monospace; font-size: 11px; letter-spacing: 0.24em; }
.brand { font-weight: 500; }
.brand a, .nav a { border-bottom: none; }
.brand em { color: var(--moss); font-style: normal; }
.brand span { color: var(--dim); font-weight: 400; }
.nav { display: flex; gap: 22px; color: var(--dim); text-transform: uppercase; font-size: 10px; flex-wrap: wrap; }
.nav .langs { display: flex; gap: 10px; }
.nav a.active { color: var(--moss); }

main { max-width: 680px; margin: 0 auto; padding: 0 var(--pad) 14vh; position: relative; z-index: 2; }

.reveal { opacity: 0; transform: translateY(14px); animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards; animation-delay: var(--d, 0s); }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .reveal { animation: none; opacity: 1; transform: none; } }

.label { font-family: "IBM Plex Mono", monospace; font-size: 10.5px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--moss); margin: 7vh 0 2.5vh; }

/* ---------- hero ---------- */
.hero { margin: 8vh 0 0; }
/* opsz зажат вниз — на display-опсайзе тонкие штрихи Bodoni исчезают */
.hero h1 { font-family: "Bodoni Moda", serif; font-weight: 650; font-variation-settings: "opsz" 16; font-size: clamp(46px, 8vw, 88px); line-height: 1.02; letter-spacing: 0.015em; }
.hero h1 em { font-style: italic; font-weight: 520; color: var(--moss); }
.hero .lede { font-size: 19px; color: #4a4e44; margin-top: 3vh; max-width: 32em; }
.hero .tuned { font-family: "IBM Plex Mono", monospace; font-size: 11.5px; letter-spacing: 0.04em; line-height: 2.3; color: var(--dim); margin-top: 2.6vh; }
.hero .tuned b { font-weight: 500; color: var(--ink); background: var(--paper-deep); border: 1px solid var(--hair); border-radius: 3px; padding: 0.28em 0.6em; white-space: nowrap; }
.hero .meta { font-family: "IBM Plex Mono", monospace; font-size: 11px; letter-spacing: 0.12em; color: var(--dim); margin-top: 2.2vh; }
.hero .meta b { color: var(--moss); font-weight: 500; }

/* ---------- статы ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--hair); border: 1px solid var(--hair); border-radius: 5px; overflow: hidden; margin: 6vh 0 0; }
.stats div { background: var(--paper); padding: 16px 16px 13px; }
.stats b { display: block; font-family: "Bodoni Moda", serif; font-weight: 650; font-variation-settings: "opsz" 16; font-size: 30px; line-height: 1.1; }
.stats div:last-child b { font-family: "IBM Plex Mono", monospace; font-size: 15px; font-weight: 500; color: var(--moss); line-height: 2.2; }
.stats span { font-family: "IBM Plex Mono", monospace; font-size: 9.5px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--dim); }
@media (max-width: 560px) { .stats { grid-template-columns: 1fr 1fr; } }

/* ---------- флоу ---------- */
.flow { display: flex; align-items: center; gap: 10px 12px; flex-wrap: wrap; margin: 5vh 0 0; }
.flow .step { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: 0.04em; border: 1px solid var(--hair); background: var(--paper-deep); border-radius: 4px; padding: 9px 14px; }
.flow .step:first-child { border-color: rgba(46, 107, 65, 0.55); color: var(--moss); font-weight: 500; }
.flow .arr { font-style: normal; color: var(--moss); font-family: "IBM Plex Mono", monospace; font-size: 13px; }

/* ---------- curl ---------- */
.curl {
  display: flex; align-items: center; gap: 14px; margin: 0;
  background: var(--paper-deep); border: 1px solid var(--hair); border-radius: 4px;
  padding: 13px 18px; font-family: "IBM Plex Mono", monospace; font-size: 13px;
  overflow-x: auto;
}
.curl code { white-space: nowrap; }
.curl code::before { content: "$ "; color: var(--moss); }
.curl button {
  margin-left: auto; flex-shrink: 0; cursor: pointer;
  font-family: inherit; font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--dim); background: none; border: 1px solid var(--hair); border-radius: 3px;
  padding: 5px 11px; transition: color 0.25s, border-color 0.25s;
}
.curl button:hover { color: var(--moss); border-color: var(--moss); }

/* ---------- карточки разделов ---------- */
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 0; }
.card { border: 1px solid var(--hair); border-radius: 5px; padding: 18px 20px 16px; transition: border-color 0.25s; }
.card:hover { border-color: rgba(46, 107, 65, 0.45); }
.card .top { display: flex; align-items: center; justify-content: space-between; }
.card svg { width: 21px; height: 21px; color: var(--moss); }
.card .num { font-family: "IBM Plex Mono", monospace; font-size: 10px; letter-spacing: 0.18em; color: var(--dim); }
.card h3 { font-family: "Bodoni Moda", serif; font-weight: 700; font-size: 18.5px; line-height: 1.2; margin-top: 12px; }
.card p { font-size: 14.5px; line-height: 1.55; color: #4a4e44; margin-top: 5px; }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }

/* ---------- полный текст ---------- */
details.full { border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); margin-top: 7vh; }
details.full summary {
  cursor: pointer; list-style: none; padding: 20px 2px;
  font-family: "IBM Plex Mono", monospace; font-size: 10.5px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--moss);
  display: flex; align-items: baseline; gap: 14px;
}
details.full summary::-webkit-details-marker { display: none; }
details.full summary::before { content: "▸"; transition: rotate 0.25s; }
details.full[open] summary::before { rotate: 90deg; }
details.full summary .hint { margin-left: auto; color: var(--dim); letter-spacing: 0.12em; text-transform: none; }
details.full summary .hint a { border-bottom: 1px solid var(--hair); }
details.full .prose { padding: 1vh 2px 6vh; }

.prose > * + * { margin-top: 1.35em; }
.prose h2 { font-family: "Bodoni Moda", serif; font-weight: 700; font-size: 27px; line-height: 1.2; margin-top: 2.4em; scroll-margin-top: 3vh; }
.prose h2::before { content: "## "; font-family: "IBM Plex Mono", monospace; font-size: 13px; color: rgba(46, 107, 65, 0.5); vertical-align: 0.35em; letter-spacing: 0; }
.prose h3 { font-family: "Bodoni Moda", serif; font-weight: 700; font-size: 21px; margin-top: 2em; scroll-margin-top: 3vh; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.45em; }
.prose li::marker { color: var(--moss); }
.prose code { font-family: "IBM Plex Mono", monospace; font-size: 0.82em; background: var(--paper-deep); border: 1px solid var(--hair); border-radius: 3px; padding: 0.12em 0.42em; }
.prose pre { background: var(--paper-deep); border: 1px solid var(--hair); border-radius: 4px; padding: 18px 22px; overflow-x: auto; line-height: 1.55; }
.prose pre code { background: none; border: none; padding: 0; font-size: 13px; }
.prose strong { font-weight: 600; }
.prose hr { border: none; text-align: center; margin: 3em 0; }
.prose hr::after { content: "· · ·"; color: var(--dim); letter-spacing: 0.6em; font-size: 14px; }

.post-end { text-align: center; font-family: "Noto Serif JP", serif; color: rgba(46, 107, 65, 0.35); font-size: 22px; margin-top: 9vh; }

footer.colophon {
  max-width: 680px; margin: 0 auto; padding: 0 var(--pad) 8vh;
  font-family: "IBM Plex Mono", monospace; font-size: 10.5px; letter-spacing: 0.14em; color: var(--dim);
  display: flex; gap: 20px; flex-wrap: wrap; border-top: 1px solid var(--hair); padding-top: 26px;
}
footer.colophon a { border-bottom: none; }

.err404 { margin: 16vh 0; }
.err404 h1 { font-family: "Bodoni Moda", serif; font-weight: 800; font-size: clamp(60px, 12vw, 130px); line-height: 1; }
.err404 p { font-family: "IBM Plex Mono", monospace; font-size: 12px; color: var(--dim); margin-top: 3vh; letter-spacing: 0.12em; }