:root{
  --c-primary:#1a73e8; --c-primary-dark:#1557b0; --c-bg:#f8faff;
  --c-text:#202124; --c-muted:#5f6368; --c-border:#e3e8ef; --c-card:#fff;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:'Roboto',-apple-system,BlinkMacSystemFont,sans-serif;
  background-color:var(--c-bg); color:var(--c-text); line-height:1.75; font-size:17px;
}

/* ── Шапка с логотипом ─────────────────────────────────────── */
.site-head{background:#fff;border-bottom:1px solid var(--c-border);position:sticky;top:0;z-index:10;
  box-shadow:0 2px 12px rgba(26,115,232,.08)}
.head-in{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:860px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand img{width:40px;height:40px;border-radius:50%;display:block}
.brand span{font-family:'Roboto Mono',monospace;font-weight:700;font-size:1.12rem;color:var(--c-primary-dark)}
.nav a{color:var(--c-muted);text-decoration:none;margin-left:18px;font-size:.94rem;font-weight:500}
.nav a:hover{color:var(--c-primary)}
.nav-cta{background:var(--c-primary);color:#fff!important;padding:8px 16px;border-radius:8px}
.nav-cta:hover{background:var(--c-primary-dark)}

/* ── Клетчатый фон как на главной (эффект прозрачности) ────── */
.checker{
  background-color:#fff;
  background-image:
    linear-gradient(45deg,#eee 25%,transparent 25%,transparent 75%,#eee 75%,#eee),
    linear-gradient(45deg,#eee 25%,transparent 25%,transparent 75%,#eee 75%,#eee);
  background-position:0 0,17px 17px;
  background-size:34px 34px;
  padding:34px 0 60px;
  min-height:60vh;
}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}

/* ── Карточка контента (белая поверх клеток) ───────────────── */
.sheet{background:#fff;border-radius:16px;box-shadow:0 10px 40px rgba(0,0,0,.10);
  padding:34px 38px 40px}

h1{font-size:2rem;line-height:1.3;margin-bottom:14px;font-weight:700;letter-spacing:-.01em}
h2{font-size:1.4rem;margin:34px 0 14px;font-weight:700;line-height:1.35}
h3{font-size:1.13rem;margin:24px 0 10px;font-weight:500}
p{margin-bottom:16px}
ul,ol{margin:0 0 18px 24px}
li{margin-bottom:9px}
a{color:var(--c-primary)}
a:hover{color:var(--c-primary-dark)}
code{font-family:'Roboto Mono',monospace;background:#eef3fb;padding:2px 6px;border-radius:4px;font-size:.9em}
.lead{font-size:1.09rem;color:var(--c-muted);margin-bottom:26px;padding-bottom:22px;border-bottom:1px solid var(--c-border)}
.cta-box{background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));color:#fff;
  padding:26px 28px;border-radius:14px;margin:34px 0;text-align:center}
.cta-box h3{color:#fff;margin:0 0 10px;font-size:1.25rem}
.cta-box p{color:rgba(255,255,255,.94);margin-bottom:18px}
.btn{display:inline-block;background:#fff;color:var(--c-primary)!important;font-weight:700;
  padding:12px 28px;border-radius:9px;text-decoration:none;box-shadow:0 4px 6px rgba(0,0,0,.12)}
.btn:hover{background:#f1f6ff}
.related{background:#f8faff;border:1px solid var(--c-border);border-radius:12px;padding:22px 24px;margin:34px 0}
.related h3{margin-top:0}
.related ul{margin-bottom:0}
.related li{font-size:.96rem}

/* ── Карточки статей ───────────────────────────────────────── */
.cards{display:grid;gap:16px;margin:26px 0}
.card{background:#fff;border:1px solid var(--c-border);border-radius:12px;padding:20px 22px;
  display:block;text-decoration:none;transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:0 6px 20px rgba(26,115,232,.14);transform:translateY(-2px)}
.card h3{margin:0 0 7px;color:var(--c-primary-dark)}
.card p{margin:0;color:var(--c-muted);font-size:.93rem;line-height:1.6}

/* ── Пагинация ─────────────────────────────────────────────── */
.pag{display:flex;align-items:center;justify-content:center;gap:8px;margin:32px 0 6px;flex-wrap:wrap}
.pag a,.pag span{display:inline-flex;align-items:center;justify-content:center;
  min-width:42px;height:42px;padding:0 14px;border-radius:10px;font-size:.95rem;font-weight:500;
  text-decoration:none;border:1px solid var(--c-border);background:#fff;color:var(--c-muted)}
.pag a:hover{border-color:var(--c-primary);color:var(--c-primary);background:#f4f8ff}
.pag .cur{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:700}
.pag .dis{opacity:.4;pointer-events:none}
.pag-label{font-size:.9rem;color:var(--c-muted);text-align:center;margin-top:6px}

.table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.95rem;background:#fff;
  border-radius:10px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.table th{background:#eef3fb;text-align:left;padding:11px 14px;font-weight:500;font-size:.9rem;color:var(--c-primary-dark)}
.table td{padding:11px 14px;border-top:1px solid var(--c-border)}
.note{background:#fff8e6;border-left:4px solid #f0a500;padding:14px 18px;border-radius:0 8px 8px 0;margin:20px 0}
.note p:last-child{margin-bottom:0}
.steps{counter-reset:s;list-style:none;margin-left:0}
.steps li{counter-increment:s;position:relative;padding-left:44px;margin-bottom:16px}
.steps li::before{content:counter(s);position:absolute;left:0;top:1px;width:30px;height:30px;
  background:var(--c-primary);color:#fff;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-weight:700;font-size:.9rem}

.site-foot{background:#fff;border-top:1px solid var(--c-border);padding:28px 20px;margin-top:0}
.site-foot p{color:var(--c-muted);font-size:.92rem;margin-bottom:8px;text-align:center}
.site-foot a{text-decoration:none}
.foot-brand{display:flex;align-items:center;justify-content:center;gap:9px;margin-bottom:12px}
.foot-brand img{width:30px;height:30px;border-radius:50%}
.foot-brand span{font-family:'Roboto Mono',monospace;font-weight:700;color:var(--c-primary-dark)}

@media(max-width:640px){
  body{font-size:16px}
  h1{font-size:1.55rem}
  h2{font-size:1.22rem}
  .sheet{padding:24px 20px 30px;border-radius:12px}
  .checker{padding:20px 0 44px}
  .head-in{padding:9px 16px}
  .nav a{margin-left:11px;font-size:.86rem}
  .brand img{width:34px;height:34px}
  .brand span{font-size:1rem}
  .pag a,.pag span{min-width:38px;height:38px;padding:0 11px;font-size:.9rem}
}