/* Общие стили лендинга и блога. Светлая тема по умолчанию, тёмная по системной настройке. */
:root {
  --ink: #0F172A; --ink-2: #334155; --muted: #56677C;
  --ground: #F3F6FA; --surface: #FFFFFF; --raised: #EEF3F8;
  --line: #CBD5E1; --line-soft: #E2E8F0;
  --accent: #0FA99F; --accent-ink: #0B7C75; --accent-soft: rgba(15,169,159,.12);
  --amber: #E8930C; --amber-ink: #A66400; --amber-soft: rgba(232,147,12,.12);
  --crit: #DC2F4B; --warn: #B45309; --info: #2563EB; --ok: #15803D;
  /* кнопка действия: в светлой теме тёмная бирюза с белым, в тёмной яркая бирюза с тёмным текстом */
  --btn-bg: #0B7C75; --btn-ink: #FFFFFF;
  --shadow: 0 1px 2px rgba(15,23,42,.05), 0 10px 30px rgba(15,23,42,.06);
  --f-display: ui-monospace, SFMono-Regular, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --f-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --pad: clamp(1.2rem, 4vw, 4rem);
  --maxw: 1180px;
  /* hero всегда тёмный */
  --hero-bg: #0B1220; --hero-ink: #EAF2FA; --hero-ink-2: #B9C7D6; --hero-muted: #8593A5; --hero-line: rgba(255,255,255,.1);
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #E5EDF5; --ink-2: #B6C2D1; --muted: #8593A5;
    --ground: #0B1220; --surface: #121C2C; --raised: #182436;
    --line: #2A3A50; --line-soft: #1E2B3E;
    --accent: #2DD4BF; --accent-ink: #7EE8D9; --accent-soft: rgba(45,212,191,.14);
    --amber: #F5B342; --amber-ink: #FFD08A; --amber-soft: rgba(245,179,66,.14);
    --crit: #F0587A; --warn: #F5B342; --info: #7AA7F7; --ok: #5FD38D;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.35);
    --btn-bg: #2DD4BF; --btn-ink: #06231F;
  }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } html { scroll-behavior: auto; } }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 60px; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--f-body); font-size: 16px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
p { margin: 0 0 .7rem; }
b, strong { font-weight: 600; }

/* ---------- top rail ---------- */
.rail {
  position: sticky; top: 0; z-index: 40; height: 50px;
  display: flex; align-items: center; gap: 1.2rem; padding: 0 var(--pad);
  background: color-mix(in srgb, var(--ground) 86%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line-soft);
  font-family: var(--f-display); font-size: 11px; letter-spacing: .09em; text-transform: uppercase; color: var(--muted);
}
.rail .mark { color: var(--ink); letter-spacing: .16em; white-space: nowrap; display: flex; align-items: center; gap: .5rem; }
.rail .mark b { color: var(--accent); }
.rail .mark svg { width: 18px; height: 18px; }
.rail nav { display: flex; gap: 1.1rem; overflow-x: auto; scrollbar-width: none; flex: 1; }
.rail nav::-webkit-scrollbar { display: none; }
.rail nav a { text-decoration: none; white-space: nowrap; color: var(--muted); }
.rail nav a:hover, .rail nav a.on { color: var(--ink); }
.rail .cta { text-decoration: none; color: var(--btn-ink); background: var(--btn-bg); border-radius: 4px; padding: .38rem .7rem; white-space: nowrap; font-weight: 700; transition: filter .15s; }
.rail .cta:hover { filter: brightness(1.1); }
.rail.on-hero { background: color-mix(in srgb, var(--hero-bg) 80%, transparent); border-color: var(--hero-line); }
.rail.on-hero .cta { background: #2DD4BF; color: #06231F; }
.rail.on-hero .mark, .rail.on-hero nav a.on { color: var(--hero-ink); }
.rail.on-hero nav a { color: var(--hero-muted); }
.rail.on-hero nav a:hover { color: var(--hero-ink); }

/* ---------- sections ---------- */
section { padding: clamp(2.2rem, 6vh, 4.2rem) var(--pad); }
section + section { border-top: 1px solid var(--line-soft); }
section.alt { background: var(--surface); }
.wrap { max-width: var(--maxw); margin: 0 auto; }
.eyebrow { font-family: var(--f-display); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: .6rem; display: flex; align-items: center; gap: .6rem; }
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--accent); border-radius: 1px; }
h1 { font-family: var(--f-display); font-size: clamp(1.9rem, 5vw, 3.6rem); line-height: 1.05; letter-spacing: -.02em; text-transform: uppercase; text-wrap: balance; margin: 0 0 1.1rem; }
h2 { font-family: var(--f-display); font-size: clamp(1.25rem, 2.4vw, 1.75rem); line-height: 1.18; letter-spacing: -.01em; text-wrap: balance; margin: 0 0 .5rem; font-weight: 700; }
h3 { font-family: var(--f-display); font-size: 11.5px; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); margin: 0 0 .45rem; font-weight: 700; }
.lede { font-size: 1rem; line-height: 1.5; color: var(--ink-2); max-width: 70ch; margin: 0 0 1.3rem; }
.mark-accent { color: var(--accent); }
.mark-amber { color: var(--amber-ink); }

/* ---------- hero ---------- */
.hero {
  background: var(--hero-bg); color: var(--hero-ink); position: relative; overflow: hidden;
  padding-top: clamp(3rem, 9vh, 6rem); padding-bottom: clamp(2.6rem, 7vh, 4.6rem);
  border-bottom: 0;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(45,212,191,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(45,212,191,.07) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.9), transparent 85%);
}
.hero::after {
  content: ""; position: absolute; right: -220px; top: -260px; width: 760px; height: 760px; border-radius: 50%; pointer-events: none;
  background: radial-gradient(closest-side, rgba(45,212,191,.28), transparent);
}
.hero .wrap { position: relative; z-index: 1; }
.hero .eyebrow { color: #7EE8D9; }
.hero .eyebrow::before { background: #2DD4BF; }
.hero h1 { color: var(--hero-ink); }
.hero h1 span { color: #2DD4BF; }
.hero .lede { color: var(--hero-ink-2); font-size: clamp(1.05rem, 1.4vw, 1.2rem); max-width: 62ch; }
.btns { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.3rem 0 2rem; }
.btn { font-family: var(--f-display); font-size: 12px; letter-spacing: .09em; text-transform: uppercase; text-decoration: none; padding: .75rem 1.15rem; border-radius: 5px; border: 1px solid var(--line); color: var(--ink); background: var(--surface); transition: transform .15s, filter .15s, border-color .15s; }
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: #2DD4BF; border-color: #2DD4BF; color: #06231F; font-weight: 700; box-shadow: 0 6px 20px rgba(45,212,191,.28); }
.btn.primary:hover { filter: brightness(1.08); }
.hero .btn.ghost { background: transparent; border-color: rgba(255,255,255,.28); color: var(--hero-ink); }
.hero .btn.ghost:hover { border-color: #fff; }
.stats { display: grid; gap: 1px; background: var(--hero-line); border: 1px solid var(--hero-line); border-radius: 8px; overflow: hidden; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.stat { background: rgba(255,255,255,.04); padding: .95rem 1rem; }
.stat .v { font-family: var(--f-display); font-size: clamp(1.25rem, 2.4vw, 1.7rem); line-height: 1.1; color: var(--hero-ink); }
.stat .v em { font-style: normal; color: #2DD4BF; }
.stat .k { font-family: var(--f-display); font-size: 10px; letter-spacing: .09em; text-transform: uppercase; color: var(--hero-muted); margin-top: .4rem; }

/* ---------- layout helpers ---------- */
.cols { display: grid; gap: clamp(.7rem, 1.3vw, 1.1rem); }
.c2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.c3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.c4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.split { display: grid; gap: clamp(.8rem, 1.7vw, 1.5rem); grid-template-columns: 1fr; }
@media (min-width: 900px) { .split { grid-template-columns: 1.05fr .95fr; } }
.cols > *, .split > * { min-width: 0; }
.card, .pain, .tile, .step { transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease; }
.card:hover, .pain:hover, .tile:hover, .step:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 45%, var(--line-soft)); }
.card { background: var(--surface); border: 1px solid var(--line-soft); border-radius: 8px; padding: .95rem 1.05rem; box-shadow: var(--shadow); }
.card.flat { box-shadow: none; background: transparent; border-color: var(--line); }
.card p:last-child { margin-bottom: 0; }
ul.list { list-style: none; margin: 0; padding: 0; display: grid; gap: .4rem; font-size: .93rem; }
ul.list li { padding-left: 1.05rem; position: relative; color: var(--ink-2); }
ul.list li::before { content: ""; position: absolute; left: 0; top: .62em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
ul.list li b { color: var(--ink); }
.note { font-size: .9rem; color: var(--muted); border-left: 2px solid var(--accent); padding-left: .8rem; max-width: 78ch; }

/* ---------- pains: компактная сетка ---------- */
.pains { display: grid; gap: .7rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.pain { background: var(--surface); border: 1px solid var(--line-soft); border-radius: 8px; padding: .85rem .95rem; box-shadow: var(--shadow); display: grid; gap: .35rem; position: relative; }
.pain .n { font-family: var(--f-display); font-size: 10.5px; letter-spacing: .12em; color: var(--amber-ink); }
.pain .sym { font-weight: 600; color: var(--ink); font-size: .98rem; line-height: 1.3; }
.pain .end { font-size: .88rem; color: var(--ink-2); }
.pain .end::before { content: "→ "; color: var(--amber-ink); font-weight: 700; }
.pain:hover { border-color: color-mix(in srgb, var(--amber) 55%, var(--line-soft)); }

/* ---------- tiles: что делаем ---------- */
.tiles { display: grid; gap: .7rem; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }
.tile { background: var(--surface); border: 1px solid var(--line-soft); border-radius: 8px; padding: .95rem 1.05rem; box-shadow: var(--shadow); display: grid; grid-template-columns: 40px 1fr; gap: .8rem; align-items: start; }
.tile .ic { width: 40px; height: 40px; border-radius: 9px; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; }
.tile .ic svg { width: 22px; height: 22px; }
.tile h3 { font-family: var(--f-body); text-transform: none; letter-spacing: 0; font-size: 1rem; color: var(--ink); margin-bottom: .2rem; }
.tile p { font-size: .9rem; color: var(--ink-2); margin: 0; }

/* ---------- timeline: как начинаем ---------- */
.steps { display: grid; gap: .7rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); counter-reset: step; }
.step { background: var(--surface); border: 1px solid var(--line-soft); border-radius: 8px; padding: .95rem 1.05rem; box-shadow: var(--shadow); position: relative; }
.step::before { counter-increment: step; content: counter(step); position: absolute; top: -.7rem; left: 1rem; width: 1.6rem; height: 1.6rem; border-radius: 50%; background: var(--accent); color: #fff; font-family: var(--f-display); font-weight: 700; font-size: .85rem; display: grid; place-items: center; }
.step.hl { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow); }
.step .t { font-family: var(--f-display); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-ink); margin: .3rem 0 .35rem; }
.step h3 { font-family: var(--f-body); text-transform: none; letter-spacing: 0; font-size: 1.02rem; color: var(--ink); margin-bottom: 0; }
.step p { font-size: .9rem; color: var(--ink-2); margin: 0; }
.step .tag { position: absolute; top: .8rem; right: .9rem; font-family: var(--f-display); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-ink); background: var(--accent-soft); padding: .2rem .45rem; border-radius: 3px; }

/* ---------- tables ---------- */
.tw { overflow-x: auto; border: 1px solid var(--line-soft); border-radius: 8px; background: var(--surface); max-width: 100%; }
table { border-collapse: collapse; width: 100%; min-width: 480px; font-size: .9rem; }
th, td { text-align: left; padding: .5rem .75rem; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
th { font-family: var(--f-display); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); font-weight: 700; background: var(--raised); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
.chip { display: inline-flex; align-items: center; font-family: var(--f-display); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; padding: .2rem .5rem; border-radius: 3px; border: 1px solid currentColor; white-space: nowrap; }
.chip.crit { color: var(--crit); } .chip.warn { color: var(--warn); } .chip.info { color: var(--info); } .chip.ok { color: var(--ok); }

/* ---------- alert mock ---------- */
.msg { background: var(--surface); border: 1px solid var(--line-soft); border-radius: 8px; padding: .95rem 1.05rem; box-shadow: var(--shadow); }
.msg .hd { font-weight: 700; font-size: 1rem; margin-bottom: .5rem; }
.msg .hd .sev { font-family: var(--f-display); letter-spacing: .06em; }
.msg .desc { font-family: var(--f-display); font-size: .8rem; line-height: 1.55; background: var(--raised); border: 1px solid var(--line-soft); border-radius: 5px; padding: .6rem .75rem; color: var(--ink-2); white-space: pre-wrap; margin-bottom: .55rem; }
.msg .fold, .msg .links { font-size: .84rem; font-family: var(--f-display); }
.msg .fold { color: var(--muted); }
.msg .links { color: var(--info); margin-top: .5rem; }

/* ---------- contact ---------- */
.contact { background: var(--hero-bg); color: var(--hero-ink); position: relative; overflow: hidden; }
.contact::after { content: ""; position: absolute; left: -200px; bottom: -300px; width: 640px; height: 640px; border-radius: 50%; pointer-events: none; background: radial-gradient(closest-side, rgba(45,212,191,.22), transparent); }
.contact .wrap { position: relative; z-index: 1; }
.contact .eyebrow { color: #7EE8D9; } .contact .eyebrow::before { background: #2DD4BF; }
.contact h2 { color: var(--hero-ink); }
.contact .lede { color: var(--hero-ink-2); }
.contact .big { font-family: var(--f-display); font-size: clamp(1.05rem, 2vw, 1.4rem); color: var(--hero-ink); text-decoration: none; display: inline-flex; align-items: center; gap: .6rem; margin: 0 1.6rem .6rem 0; padding: .7rem 1rem; border: 1px solid rgba(255,255,255,.22); border-radius: 6px; }
.contact .big { transition: border-color .15s, color .15s, transform .15s; }
.contact .big:hover { border-color: #2DD4BF; color: #2DD4BF; transform: translateY(-1px); }
footer { padding: 1.2rem var(--pad) 2rem; font-family: var(--f-display); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; gap: .6rem 2rem; }

/* ---------- blog ---------- */
.crumbs { font-family: var(--f-display); font-size: 11px; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin-bottom: 1rem; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--ink); }
.post-list { display: grid; gap: .8rem; }
.post-list .card h3 { font-family: var(--f-body); text-transform: none; letter-spacing: 0; font-size: 1.05rem; color: var(--ink); margin-bottom: .3rem; }
.post-list .card h3 a { text-decoration: none; }
.post-list .card h3 a:hover { color: var(--accent-ink); }
.post-list .meta, .article .meta { font-family: var(--f-display); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.post-list .card p { font-size: .93rem; color: var(--ink-2); margin: .4rem 0 0; }
.article { max-width: 76ch; }
.article h1 { text-transform: none; font-size: clamp(1.6rem, 3.6vw, 2.5rem); letter-spacing: -.01em; }
.article h2 { margin-top: 2rem; }
.article h3 { font-family: var(--f-body); text-transform: none; letter-spacing: 0; font-size: 1.05rem; color: var(--ink); margin-top: 1.4rem; }
.article p, .article li { font-size: 1rem; color: var(--ink-2); }
.article ul, .article ol { padding-left: 1.3rem; margin: 0 0 1rem; }
.article li { margin-bottom: .35rem; }
.article pre { margin: 0 0 1rem; padding: .7rem .85rem; overflow-x: auto; background: var(--raised); border: 1px solid var(--line-soft); border-radius: 6px; font-family: var(--f-display); font-size: .82rem; line-height: 1.5; color: var(--ink-2); }
.article code { font-family: var(--f-display); font-size: .88em; background: var(--raised); border: 1px solid var(--line-soft); border-radius: 3px; padding: .06em .34em; }
.article pre code { background: none; border: 0; padding: 0; }
.article table { min-width: 0; }
.article .tw { margin-bottom: 1rem; }
.article blockquote { margin: 1.2rem 0; padding: .8rem 1rem; border-left: 2px solid var(--accent); background: var(--surface); border-radius: 0 6px 6px 0; }
.article blockquote p:last-child { margin-bottom: 0; }
.article img { max-width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--line-soft); }
.article .cta-box { margin-top: 2.4rem; }
.article hr { border: 0; border-top: 1px solid var(--line-soft); margin: 1.6rem 0; }