/* Страница «Сборка»: интерактивная схема подключения. Всё под .sb, чтобы не задевать главную. */
.sb{
  --fg:var(--ink); --copper2:var(--acc-2); --f-disp:var(--f-display);
  --f-mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --pcb:#17332c;
  --w-s:#ecc53c; --w-v:#e4523f; --w-g:#7b828c; --w-b:#4b8ff0; --w-gr:#45c06e; --w-r:#ff6a5c; --w-5v:#ff8a3d;
  --warn:#e8b04a;
  padding-bottom:clamp(40px,6vw,80px);
}
.sb section{padding-block:clamp(28px,4vw,48px)}
.sb-head{padding:clamp(16px,3vw,40px) 0 8px;display:grid;gap:16px}
.sb-head h1{font-size:clamp(2rem,4.6vw,3.4rem);line-height:1.06}
.sb-head h1 em{font-style:normal;background:linear-gradient(90deg,var(--acc),var(--acc-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.sb-head .lead{margin-top:0;max-width:44em}
.sb-actions{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center}

.sb-modes{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.sb-seg{font:inherit;font-weight:600;font-size:.95rem;color:var(--ink);background:var(--card);border:1px solid var(--line-2);border-radius:999px;padding:10px 18px;min-height:44px;cursor:pointer}
.sb-seg[aria-pressed="true"]{background:linear-gradient(135deg,var(--acc),var(--acc-2));color:var(--on-acc);border-color:transparent}

.sb-stage{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px;align-items:start}
@media (max-width:1050px){.sb-stage{grid-template-columns:minmax(0,1fr)}}
.sb-board,.sb-side,.sb-card{background:linear-gradient(180deg,var(--card-2),var(--card));border:1px solid var(--line);border-radius:18px;box-shadow:inset 0 1px 0 rgba(255,255,255,.05),0 30px 60px -40px rgba(0,0,0,.9);min-width:0}
.sb-board{padding:12px}
.sb-scroll{overflow-x:auto}
#sbSch{display:block;width:100%;min-width:760px;height:auto}
.sb-chips{display:flex;flex-wrap:wrap;gap:6px;padding:4px 4px 10px}
.sb-chip{font:inherit;font-size:.92rem;color:var(--ink);background:var(--bg-2);border:1px solid var(--line-2);border-radius:999px;padding:7px 13px;min-height:40px;display:inline-flex;align-items:center;gap:8px;cursor:pointer}
.sb-chip i{width:10px;height:10px;border-radius:50%;display:inline-block}
.sb-chip[aria-pressed="true"]{border-color:var(--acc);background:color-mix(in srgb,var(--acc) 18%,var(--card))}
.sb-opt{font-size:.72rem;color:var(--mute)}

.sb-side{padding:20px;display:flex;flex-direction:column;gap:14px;position:sticky;top:12px}
@media (max-width:1050px){.sb-side{position:static}}
.sb-side h2{font-size:1.35rem}
.sb-side p{color:var(--txt2)}
.sb-tag{display:inline-block;font:600 .7rem var(--f-body);letter-spacing:.08em;text-transform:uppercase;padding:3px 8px;border-radius:6px;border:1px solid var(--line-2);white-space:nowrap}
.sb-tag.req{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 40%,transparent)}
.sb-tag.opt{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 40%,transparent)}
.sb table{border-collapse:collapse;width:100%}
.sb-conn td{padding:8px 6px;border-top:1px solid var(--line);vertical-align:top;font-size:.95rem}
.sb-conn td:first-child{white-space:nowrap}
.sb-to{font-family:var(--f-mono);color:var(--acc-2);white-space:nowrap}
.sb-dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:8px}
.sb-tips{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px;color:var(--txt2);font-size:.95rem}
.sb-stepnav{display:flex;justify-content:space-between;gap:10px}
.sb-navb{font:inherit;font-weight:600;color:var(--ink);background:var(--bg-2);border:1px solid var(--line-2);border-radius:999px;padding:9px 18px;min-height:44px;cursor:pointer}
.sb-navb.pri{background:linear-gradient(135deg,var(--acc),var(--acc-2));color:var(--on-acc);border-color:transparent}
.sb-navb:disabled{opacity:.4;cursor:default}
.sb-stepno{font-size:.85rem;color:var(--mute)}
.sb-mut{color:var(--mute)}
.sb-prog{height:4px;background:var(--bg-2);border-radius:2px;overflow:hidden}
.sb-prog b{display:block;height:100%;background:linear-gradient(90deg,var(--acc),var(--acc-2));transition:width .3s}

/* svg */
.sb-wire{fill:none;stroke-width:3.2;stroke-linejoin:round;stroke-linecap:round;transition:opacity .25s}
.sb-wire.dash{stroke-dasharray:7 6}
.grp{transition:opacity .25s}
#sbSch.focus .grp{opacity:.13}
#sbSch.focus .grp.on{opacity:1}
#sbSch.focus .sb-wire.on{stroke-width:4.2}
.sb-pin{transition:opacity .25s}
#sbSch.focus .sb-pin{opacity:.35}
#sbSch.focus .sb-pin.on{opacity:1}
.sb-pin.on circle{stroke:var(--acc-2);stroke-width:3}
#sbSch .lbl{font-family:var(--f-body);fill:var(--ink);font-size:14px}
#sbSch .lbl.sm{font-size:12px;fill:var(--mute)}
#sbSch .lbl.mono{font-family:var(--f-mono)}
#sbSch .clk{cursor:pointer}
@keyframes sbflow{to{stroke-dashoffset:-26}}
.sb-wire.pulse{stroke-dasharray:9 4;animation:sbflow .9s linear infinite}
@media (prefers-reduced-motion:reduce){.sb-wire.pulse{animation:none}.sb-prog b{transition:none}}

/* разделы ниже схемы */
.sb-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,440px),1fr));gap:20px}
.sb-card{padding:clamp(18px,2.4vw,28px);display:flex;flex-direction:column;gap:14px}
.sb-card h2{font-size:clamp(1.3rem,2.2vw,1.7rem)}
.sb-card p{color:var(--txt2);max-width:68ch}
.sb-card ol,.sb-card ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px;color:var(--txt2)}
.sb-card b{color:var(--ink)}
.sb-wide{grid-column:1/-1}
.sb-tbl{overflow-x:auto}
.sb-tbl th,.sb-tbl td{padding:10px 8px;border-top:1px solid var(--line);text-align:left;vertical-align:top;font-size:.95rem}
.sb-tbl thead th{border-top:0;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--mute);font-weight:600}
.sb-tbl tbody th{font-weight:600;color:var(--ink);min-width:150px}
.sb-tbl td.sb-n{font-variant-numeric:tabular-nums;white-space:nowrap}
.sb code,.sb kbd{font-family:var(--f-mono);font-size:.9em;background:var(--bg-2);border:1px solid var(--line-2);border-radius:6px;padding:1px 6px;color:var(--ink)}
.sb-warn{border:1px solid color-mix(in srgb,var(--warn) 45%,transparent);background:color-mix(in srgb,var(--warn) 9%,var(--card));border-radius:12px;padding:12px 14px;color:var(--txt2)}
.sb-legend{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--txt2);font-size:.92rem}
.sb-legend span{display:inline-flex;align-items:center}