:root{--bg:#ffffff;--bg-soft:#f5f7fa;--bg-sunk:#eef2f6;--surface:#ffffff;--fg:#0f172a;--fg-2:#334155;--muted:#5b6675;--border:#e3e8ef;--border-strong:#cfd8e3;--accent:#0d9488;--accent-strong:#0f766e;--accent-2:#4f46e5;--accent-soft:#e6f6f4;--link:#0b7a70;--code-bg:#f1f4f8;--c-schematic:#2563eb;--c-boardview:#7c3aed;--c-bios:#c2410c;--c-document:#475569;--c-archive:#475569;--c-diagnostics:#e11d48;--c-power:#ca8a04;--c-tools:#0891b2;--c-brands:#4f46e5;--c-components:#059669;--pcb:#0f4d45;--pcb-dot:rgba(255,255,255,.07);--trace:#d6a84f;--silk:#e9f5f1;--chip:#0f172a;--shadow-sm:0 1px 2px rgba(15,23,42,.06);--shadow:0 1px 2px rgba(15,23,42,.05),0 4px 16px rgba(15,23,42,.06);--shadow-lg:0 10px 40px rgba(15,23,42,.12);--radius:14px;--radius-sm:9px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Text","Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;--mono:ui-monospace,"SF Mono","Cascadia Code","Segoe UI Mono",Menlo,Consolas,"Liberation Mono",monospace;color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#0b1120;--bg-soft:#0f172a;--bg-sunk:#0a0f1c;--surface:#111a2e;--fg:#e5ebf3;--fg-2:#c3cdda;--muted:#94a3b8;--border:#1f2a40;--border-strong:#2c3a55;--accent:#2dd4bf;--accent-strong:#5eead4;--accent-2:#818cf8;--accent-soft:#0d2b2a;--link:#5eead4;--code-bg:#162036;--c-schematic:#7aa7ff;--c-boardview:#b39dff;--c-bios:#fb923c;--c-document:#9aa7b8;--c-archive:#9aa7b8;--c-diagnostics:#fb7185;--c-power:#facc15;--c-tools:#22d3ee;--c-brands:#a5b4fc;--c-components:#34d399;--pcb:#0d3b36;--pcb-dot:rgba(255,255,255,.06);--trace:#c99a45;--silk:#d7ece6;--chip:#060b16;--shadow-sm:none;--shadow:0 1px 0 rgba(255,255,255,.03);--shadow-lg:0 10px 40px rgba(0,0,0,.45);color-scheme:dark}}:root[data-theme="dark"]{--bg:#0b1120;--bg-soft:#0f172a;--bg-sunk:#0a0f1c;--surface:#111a2e;--fg:#e5ebf3;--fg-2:#c3cdda;--muted:#94a3b8;--border:#1f2a40;--border-strong:#2c3a55;--accent:#2dd4bf;--accent-strong:#5eead4;--accent-2:#818cf8;--accent-soft:#0d2b2a;--link:#5eead4;--code-bg:#162036;--c-schematic:#7aa7ff;--c-boardview:#b39dff;--c-bios:#fb923c;--c-document:#9aa7b8;--c-archive:#9aa7b8;--c-diagnostics:#fb7185;--c-power:#facc15;--c-tools:#22d3ee;--c-brands:#a5b4fc;--c-components:#34d399;--pcb:#0d3b36;--pcb-dot:rgba(255,255,255,.06);--trace:#c99a45;--silk:#d7ece6;--chip:#060b16;--shadow-sm:none;--shadow:0 1px 0 rgba(255,255,255,.03);--shadow-lg:0 10px 40px rgba(0,0,0,.45);color-scheme:dark}*,*::before,*::after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:76px}body{margin:0;background:var(--bg);color:var(--fg);font:16.5px/1.65 var(--font);overflow-wrap:break-word;-webkit-font-smoothing:antialiased}a{color:var(--link);text-underline-offset:.18em;text-decoration-thickness:1px}a:hover{color:var(--accent-strong)}img,svg{max-width:100%}code,kbd,pre{font-family:var(--mono);font-size:.9em}code{background:var(--code-bg);padding:.12em .4em;border-radius:6px;border:1px solid var(--border)}pre{background:var(--code-bg);padding:1rem;border-radius:var(--radius-sm);overflow-x:auto;border:1px solid var(--border)}pre code{background:none;padding:0;border:0}h1,h2,h3{line-height:1.2;margin:1.8em 0 .6em;letter-spacing:-.02em;font-weight:750}h1{font-size:1.9rem;margin-top:.3em}h2{font-size:1.4rem}h3{font-size:1.12rem;letter-spacing:-.01em}hr{border:0;border-top:1px solid var(--border);margin:2rem 0}::selection{background:color-mix(in srgb,var(--accent) 30%,transparent)}.container{width:100%;max-width:1180px;margin:0 auto;padding:0 16px}.muted{color:var(--muted)}.small{font-size:.875rem}.sr-only{position:absolute !important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:.5rem 1rem;z-index:50}.skip:focus{left:8px;top:8px}.icon{width:1.1em;height:1.1em;vertical-align:-.18em;flex:none}.icon-lg{width:1.7rem;height:1.7rem}.h-icon{margin-right:.45rem;color:var(--accent)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.site-header{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid var(--border)}.header-row{display:flex;align-items:center;gap:10px;padding-top:10px;padding-bottom:8px}.logo{display:inline-flex;align-items:center;gap:9px;font-weight:800;color:var(--fg);text-decoration:none;font-size:1.08rem;letter-spacing:-.02em;white-space:nowrap}.logo-icon{width:30px;height:30px;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));border-radius:9px;padding:4px}.logo-text{display:flex;flex-direction:column;line-height:1.1}.logo-name{font-weight:800;font-size:1.14rem;letter-spacing:-.025em}.logo-name em{font-style:normal;background:linear-gradient(100deg,var(--accent) 10%,var(--accent-2) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}.logo-tag{margin-top:2px;font-size:.62rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.site-header .logo .logo-text{display:none}.header-row .search{flex:1;min-width:0}.theme-toggle{flex:none;width:40px;height:40px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--fg);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:border-color .2s}.theme-toggle:hover{border-color:var(--accent)}.theme-toggle .i-sun{display:none}:root[data-theme="dark"] .theme-toggle .i-sun{display:block}:root[data-theme="dark"] .theme-toggle .i-moon{display:none}@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .theme-toggle .i-sun{display:block}:root:not([data-theme="light"]) .theme-toggle .i-moon{display:none}}.main-nav ul{display:flex;gap:2px;list-style:none;margin:0;padding:0 0 8px;overflow-x:auto;scrollbar-width:none}.main-nav ul::-webkit-scrollbar{display:none}.main-nav a{display:block;padding:6px 11px;border-radius:8px;color:var(--fg-2);text-decoration:none;font-size:.94rem;font-weight:500;white-space:nowrap;transition:background .15s,color .15s}.main-nav a:hover{background:var(--bg-soft);color:var(--fg)}.main-nav a[aria-current="page"]{color:var(--accent-strong);background:var(--accent-soft);font-weight:650}.search{position:relative;display:flex;align-items:center}.search .s-icon{position:absolute;left:12px;color:var(--muted);pointer-events:none}.search input{width:100%;min-width:0;height:40px;padding:0 38px 0 38px;font:inherit;font-size:.95rem;color:var(--fg);background:var(--bg-soft);border:1px solid var(--border);border-radius:10px;transition:border-color .15s,box-shadow .15s,background .15s}.search input::placeholder{color:var(--muted)}.search input:focus{outline:none;border-color:var(--accent);background:var(--surface);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent)}.s-kbd{position:absolute;right:9px;font-size:.75rem;color:var(--muted);border:1px solid var(--border-strong);border-radius:5px;padding:0 6px;line-height:1.5;background:var(--surface)}.search-big input{height:56px;font-size:1.05rem;padding-left:46px;padding-right:110px;border-radius:14px;background:var(--surface);box-shadow:var(--shadow)}.search-big .s-icon{left:16px;width:1.25rem;height:1.25rem}.s-btn{position:absolute;right:6px;top:6px;bottom:6px;padding:0 18px;border:0;border-radius:10px;font:inherit;font-weight:650;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-strong));cursor:pointer}:root[data-theme="dark"] .s-btn{color:#04221f}.search-pop{position:absolute;left:0;right:0;top:calc(100% + 6px);z-index:40;background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow-lg);max-height:70vh;overflow-y:auto}.search-pop a,.search-results a{display:flex;flex-direction:column;padding:9px 14px;text-decoration:none;color:var(--fg);border-bottom:1px solid var(--border)}.search-pop a:last-child{border-bottom:0}.search-pop a:hover,.search-pop a[aria-selected="true"],.search-results a:hover{background:var(--accent-soft)}.sr-title{font-weight:650}.sr-sub{font-size:.82rem;color:var(--muted)}.sr-more{font-size:.88rem;color:var(--link) !important;font-weight:600}.search-results{margin-top:1rem;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface)}.search-results:empty{display:none}.search-results p{margin:0;padding:14px}.crumbs ol{display:flex;flex-wrap:wrap;list-style:none;margin:16px 0 0;padding:0;font-size:.85rem;color:var(--muted)}.crumbs li + li::before{content:"›";margin:0 .5em;opacity:.7}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--link);text-decoration:underline}.page-head{margin:10px 0 1.2rem}.page-head h1{margin-bottom:.35em}.eyebrow,.overline{margin:1rem 0 .2rem;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-strong)}.eyebrow a{color:inherit;text-decoration:none}.eyebrow a:hover{text-decoration:underline}.overline{margin:0 0 .3rem}.lead{font-size:1.1rem;color:var(--fg-2);margin:0 0 1rem;max-width:72ch;line-height:1.6}.byline{color:var(--muted);font-size:.9rem;margin:0}.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);background:radial-gradient(900px 420px at 85% -10%,color-mix(in srgb,var(--accent-2) 16%,transparent),transparent 60%),radial-gradient(700px 380px at -5% 10%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 60%),var(--bg-soft)}.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(color-mix(in srgb,var(--fg) 10%,transparent) 1px,transparent 1px);background-size:22px 22px;mask-image:linear-gradient(to bottom,#000,transparent 85%);-webkit-mask-image:linear-gradient(to bottom,#000,transparent 85%);pointer-events:none}.hero-grid{position:relative;display:grid;gap:2rem;padding-top:2.2rem;padding-bottom:1.4rem;align-items:center}.kicker{display:inline-flex;align-items:center;gap:8px;margin:0 0 1rem;padding:5px 12px 5px 10px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-size:.82rem;font-weight:600;color:var(--fg-2);box-shadow:var(--shadow-sm)}.kicker .icon{color:var(--accent)}.hero h1{font-size:2.15rem;line-height:1.1;margin:0 0 .9rem;letter-spacing:-.035em;font-weight:800}.grad{background:linear-gradient(100deg,var(--accent) 10%,var(--accent-2) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}.hint{color:var(--muted);font-size:.88rem;margin-top:.8rem;display:flex;flex-wrap:wrap;align-items:center;gap:6px}.code-chip{font-family:var(--mono);font-size:.8rem;padding:3px 9px;border-radius:7px;background:var(--surface);border:1px solid var(--border);color:var(--fg-2);text-decoration:none}.code-chip:hover{border-color:var(--accent);color:var(--accent-strong)}.hero-visual{display:none}.hero-art{width:100%;height:auto;display:block;filter:drop-shadow(0 18px 40px rgba(15,23,42,.18))}.hero-caption{margin:.6rem 0 0;text-align:center;font-size:.82rem;color:var(--muted)}.hb-pcb{fill:var(--pcb)}.hb-dot{fill:var(--pcb-dot)}.hb-hole{fill:var(--bg-soft);stroke:var(--trace);stroke-width:3}.hb-traces path{fill:none;stroke:var(--trace);stroke-width:3;stroke-linecap:round;stroke-linejoin:round;opacity:.75}.hb-signal path{fill:none;stroke:#fff;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:14 260;animation:hb-flow 3.2s linear infinite;opacity:.9}.hb-signal path:nth-child(2){animation-delay:1.1s}.hb-signal path:nth-child(3){animation-delay:2.1s}@keyframes hb-flow{from{stroke-dashoffset:274}to{stroke-dashoffset:0}}.hb-chip{fill:var(--chip);stroke:color-mix(in srgb,var(--trace) 50%,transparent);stroke-width:1.5}.hb-bios{stroke:var(--trace);stroke-width:2}.hb-label{fill:#cbd5e1;font:700 15px var(--mono);text-anchor:middle;dominant-baseline:middle;letter-spacing:.05em}.hb-small{font-size:12px}.hb-ind rect{fill:#3f4652;stroke:#6b7280;stroke-width:1.5}.hb-caps rect{fill:#c8a165}.hb-tp circle{fill:var(--trace)}.hb-silk{fill:var(--silk);font:700 13px var(--mono);letter-spacing:.06em}.hb-tiny{font-size:9px;font-weight:600}.hb-conn{fill:#e5e7eb;opacity:.85}.hb-mark{fill:none;stroke:#fde68a;stroke-width:2;stroke-dasharray:6 4}.hero-stats{position:relative;display:grid;grid-template-columns:repeat(2,1fr);gap:10px;padding-bottom:1.6rem}.hero-stats div{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:10px 14px;box-shadow:var(--shadow-sm)}.hero-stats b{display:block;font-size:1.35rem;letter-spacing:-.02em}.hero-stats span{font-size:.82rem;color:var(--muted)}.home-section{margin-top:2.6rem}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:1rem;margin-bottom:1rem}.section-head h2{margin:0}.section-lead{color:var(--fg-2);max-width:75ch;margin:-.3rem 0 1rem}.more{display:inline-flex;align-items:center;gap:6px;font-size:.9rem;font-weight:600;white-space:nowrap;text-decoration:none}.more:hover{text-decoration:underline}.sub-h{font-size:1rem;margin:1.6rem 0 .7rem;color:var(--fg-2)}.type-cards{display:grid;grid-template-columns:1fr;gap:12px}.type-card{position:relative;display:flex;flex-direction:column;gap:6px;padding:18px 18px 16px;border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;background:var(--surface);box-shadow:var(--shadow);transition:transform .18s,border-color .18s,box-shadow .18s;overflow:hidden}.type-card::after{content:"";position:absolute;inset:auto -40px -60px auto;width:160px;height:160px;border-radius:50%;background:currentColor;opacity:.06}.type-card:hover{transform:translateY(-2px);border-color:currentColor;box-shadow:var(--shadow-lg)}.tc-icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:color-mix(in srgb,currentColor 12%,transparent)}.tc-name{font-weight:750;font-size:1.15rem;color:var(--fg)}.tc-text{color:var(--fg-2);font-size:.93rem}.tc-n{display:inline-flex;align-items:center;gap:6px;font-weight:650;font-size:.9rem;margin-top:4px}.type-schematic,.kind-schematic{color:var(--c-schematic)}.type-boardview,.kind-boardview{color:var(--c-boardview)}.type-bios,.kind-bios{color:var(--c-bios)}.kind-document,.kind-archive{color:var(--c-document)}.steps{list-style:none;margin:0;padding:0;display:grid;gap:12px;counter-reset:step}.steps li{position:relative;padding:16px 16px 14px 64px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}.step-n{position:absolute;left:16px;top:16px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2))}.steps h3{margin:0 0 .25rem;font-size:1.02rem}.steps p{margin:0;color:var(--fg-2);font-size:.93rem}.mark{--mk:#4b5563;display:inline-grid;place-items:center;flex:none;width:36px;height:36px;border-radius:10px;font:800 .8rem/1 var(--font);letter-spacing:-.02em;color:#fff;background:linear-gradient(145deg,var(--mk),color-mix(in srgb,var(--mk) 70%,#000));box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 2px 6px color-mix(in srgb,var(--mk) 35%,transparent)}.mark-xs{width:20px;height:20px;border-radius:6px;font-size:.58rem;margin-right:6px;vertical-align:-5px;box-shadow:none}.mark-sm{width:30px;height:30px;border-radius:8px;font-size:.7rem}.mark-lg{width:46px;height:46px;border-radius:12px;font-size:.95rem}.mark-xl{width:58px;height:58px;border-radius:15px;font-size:1.15rem}.brand-tiles{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr;gap:10px}.brand-tiles a{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);text-decoration:none;color:var(--fg);height:100%;transition:transform .18s,border-color .18s,box-shadow .18s}.brand-tiles a:hover{transform:translateY(-2px);border-color:var(--border-strong);box-shadow:var(--shadow-lg)}.bt-body{display:flex;flex-direction:column;min-width:0}.bt-name{font-weight:750}.bt-n{font-size:.82rem;color:var(--muted)}.bt-series{font-size:.8rem;color:var(--fg-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badges{display:inline-flex;flex-wrap:wrap;gap:5px}.badge{display:inline-flex;align-items:center;gap:4px;font-size:.74rem;font-weight:650;line-height:1;padding:4px 8px;border-radius:999px;color:var(--c);background:color-mix(in srgb,var(--c) 11%,transparent);border:1px solid color-mix(in srgb,var(--c) 28%,transparent);white-space:nowrap}.badge .icon{width:13px;height:13px}.badge-schematic{--c:var(--c-schematic)}.badge-boardview{--c:var(--c-boardview)}.badge-bios{--c:var(--c-bios)}.badge-document,.badge-archive{--c:var(--c-document)}.chips{display:flex;flex-wrap:wrap;gap:7px;list-style:none;margin:0;padding:0}.chips a,.chip-static{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--border);border-radius:999px;font-size:.9rem;text-decoration:none;color:var(--fg);background:var(--surface);transition:border-color .15s,background .15s}.chips a:hover{border-color:var(--accent);background:var(--accent-soft)}.chip-n{font-size:.75rem;color:var(--muted);font-weight:600;background:var(--bg-soft);border-radius:999px;padding:1px 7px}.chips a.chip-schematic .icon{color:var(--c-schematic)}.chips a.chip-boardview .icon{color:var(--c-boardview)}.chips a.chip-bios .icon{color:var(--c-bios)}.chip-group{margin:1.4rem 0}.h-small{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 .6rem;font-weight:700}.card-grid{display:grid;grid-template-columns:1fr;gap:12px;list-style:none;margin:0;padding:0}.card a{display:flex;flex-direction:column;gap:8px;height:100%;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;color:var(--fg);background:var(--surface);box-shadow:var(--shadow);transition:transform .18s,border-color .18s,box-shadow .18s}.card a:hover{transform:translateY(-2px);border-color:var(--border-strong);box-shadow:var(--shadow-lg)}.bc-top{display:flex;align-items:center;gap:8px}.bc-brand{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.card-title{font-weight:700;line-height:1.3}.card-meta{font-size:.82rem;color:var(--muted)}.board-list{list-style:none;margin:0;padding:0;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface)}.board-list + .board-list{margin-top:12px}.board-list li + li{border-top:1px solid var(--border)}.board-list a{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;align-items:center;padding:11px 14px;text-decoration:none;color:var(--fg);transition:background .12s}.board-list a:hover{background:var(--bg-soft)}.board-list .mark{grid-row:span 2}.bl-main{display:flex;flex-direction:column;min-width:0}.bl-title{font-weight:650}.bl-models{font-size:.82rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bl-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font-size:.8rem;color:var(--muted)}.code-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr;gap:10px}.code-grid a{display:flex;flex-direction:column;gap:4px;padding:14px 16px;border-radius:var(--radius);text-decoration:none;color:var(--fg);background:linear-gradient(160deg,var(--surface),var(--bg-soft));border:1px solid var(--border);transition:border-color .18s,transform .18s}.code-grid a:hover{border-color:var(--accent);transform:translateY(-2px)}.code-grid code{align-self:flex-start;font-size:.95rem;font-weight:700;color:var(--accent-strong);background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 25%,transparent)}.cg-name{font-weight:650;font-size:.95rem}.cg-n{font-size:.8rem;color:var(--muted)}.cat-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr;gap:10px}.cat-grid a{display:grid;grid-template-columns:auto 1fr;gap:2px 12px;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);text-decoration:none;color:var(--fg);transition:border-color .18s,transform .18s}.cat-grid a:hover{border-color:var(--cc,var(--accent));transform:translateY(-2px)}.cat-icon{grid-row:span 3;width:42px;height:42px;border-radius:11px;display:grid;place-items:center;color:var(--cc,var(--accent));background:color-mix(in srgb,var(--cc,var(--accent)) 12%,transparent)}.cat-icon .icon{width:1.35rem;height:1.35rem}.cat-name{font-weight:700}.cat-desc{font-size:.86rem;color:var(--fg-2);line-height:1.45}.cat-n{font-size:.78rem;color:var(--muted);font-weight:600}.cat-reading-schematics{--cc:var(--c-schematic)}.cat-boardview{--cc:var(--c-boardview)}.cat-bios{--cc:var(--c-bios)}.cat-diagnostics{--cc:var(--c-diagnostics)}.cat-power-circuits{--cc:var(--c-power)}.cat-tools{--cc:var(--c-tools)}.cat-brands{--cc:var(--c-brands)}.cat-components{--cc:var(--c-components)}.cat-multimeter{--cc:#d97706}:root[data-theme="dark"] .cat-multimeter{--cc:#fbbf24}@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .cat-multimeter{--cc:#fbbf24}}.guide-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}.guide-card{position:relative;padding:16px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);transition:border-color .18s,transform .18s}.guide-card:hover{border-color:var(--border-strong);transform:translateY(-2px)}.guide-card h3{margin:.35rem 0 .4rem;font-size:1.1rem}.guide-card h3 a{color:var(--fg);text-decoration:none}.guide-card h3 a::after{content:"";position:absolute;inset:0}.guide-card h3 a:hover{color:var(--link)}.guide-card p{margin:0 0 .45rem;color:var(--fg-2);font-size:.93rem}.gc-cat{position:relative;z-index:1;display:inline-flex;align-items:center;gap:6px;font-size:.74rem;font-weight:750;text-transform:uppercase;letter-spacing:.07em;text-decoration:none;color:var(--cc,var(--accent))}.gc-meta{display:flex;align-items:center;gap:5px;font-size:.8rem !important;color:var(--muted) !important}.guide-mini{list-style:none;margin:0;padding:0;display:grid;gap:8px}.guide-mini a{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--border);border-radius:12px;text-decoration:none;color:var(--fg);background:var(--surface);transition:border-color .15s}.guide-mini a:hover{border-color:var(--cc,var(--accent))}.gm-icon{flex:none;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;color:var(--cc,var(--accent));background:color-mix(in srgb,var(--cc,var(--accent)) 12%,transparent)}.gm-title{display:block;font-weight:650;line-height:1.3}.gm-cat{display:block;font-size:.8rem;color:var(--muted)}.link-list{margin:0;padding-left:1.2rem}.link-list li{margin:.3rem 0}.link-list.cols{columns:2 180px}.explain-grid{display:grid;gap:12px}.explain-grid article{padding:18px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);border-top:3px solid currentColor}.explain-grid h3{display:flex;align-items:center;gap:8px;margin:0 0 .5rem}.explain-grid p{color:var(--fg-2);font-size:.95rem;margin:0 0 .6rem}.explain-grid a{font-weight:650;font-size:.9rem;color:inherit}.faq{margin:2.4rem 0}.faq h2{display:flex;align-items:center}.faq details{border:1px solid var(--border);border-radius:12px;background:var(--surface);margin-bottom:8px;transition:border-color .15s}.faq details[open]{border-color:var(--border-strong)}.faq summary{cursor:pointer;padding:13px 44px 13px 16px;font-weight:650;list-style:none;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);font-size:1.3rem;color:var(--accent);font-weight:400}.faq details[open] summary::after{content:"−"}.faq-a{padding:0 16px 14px;color:var(--fg-2)}.faq-a p{margin:0}.about-strip{margin-top:2.6rem;display:grid;gap:1rem;padding:1.4rem;border-radius:var(--radius);border:1px solid var(--border);background:radial-gradient(600px 220px at 100% 0%,color-mix(in srgb,var(--accent-2) 10%,transparent),transparent 70%),var(--bg-soft)}.about-strip h2{margin:.1rem 0 .6rem}.about-strip .author-box{margin:0;align-self:center}.landing-head{margin-bottom:1rem}.lh-top{display:flex;align-items:center;gap:14px}.lh-top h1{margin:.1em 0 .2em}.lh-top .eyebrow{margin-top:.4rem}.lh-icon{width:58px;height:58px;border-radius:15px;display:grid;place-items:center;flex:none;background:color-mix(in srgb,currentColor 12%,transparent)}.lh-code code{font-size:1rem;font-weight:800;padding:.5em .7em;color:var(--accent-strong);background:var(--accent-soft)}.stat-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:.8rem}.stat{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:var(--bg-soft);border:1px solid var(--border);font-size:.86rem;color:var(--fg-2)}.stat b{color:var(--fg)}.t-schematic{color:var(--c-schematic)}.t-boardview{color:var(--c-boardview)}.t-bios{color:var(--c-bios)}.stat.t-schematic b,.stat.t-boardview b,.stat.t-bios b{color:inherit}.landing-intro{margin-bottom:1rem}.author-head{display:flex;flex-wrap:wrap;align-items:flex-start;gap:18px 24px;margin:14px 0 1rem}.author-head>div{flex:1 1 280px;min-width:0}.author-head h1{margin:.1em 0 .1em}.ah-photo{width:112px;height:112px;border-radius:50%;flex:none;border:3px solid var(--surface);box-shadow:0 0 0 2px var(--accent),var(--shadow)}.ah-role{margin:0 0 .6rem;font-weight:650;color:var(--accent-strong)}.ah-actions{display:flex;flex-wrap:wrap;gap:10px;margin:0}.author-stats{margin:0 0 1.4rem}.author-grid{display:grid;grid-template-columns:1fr;gap:8px 32px}.author-side section{margin-bottom:1.2rem}.author-side .chips{margin:0}.check-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}.check-list li{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;font-size:.95rem;color:var(--fg-2);line-height:1.5}.check-list .icon{color:var(--accent);margin-top:3px}.author-topics{margin:1.6rem 0}.author-note{margin-top:2rem}@media (min-width: 900px){.author-grid{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr)}}.new-icon{color:var(--accent)}.new-day{margin:1.4rem 0}.new-day-h{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;font-size:1.15rem;margin:0 0 .6rem}.new-day-n{font-size:.82rem;font-weight:500;color:var(--muted)}.new-n{font-weight:700;color:var(--accent-strong)}.new-feed{display:flex;align-items:center;gap:6px;margin-top:1.4rem}.stat-last{border-color:color-mix(in srgb,var(--accent) 40%,var(--border));background:var(--accent-soft);color:var(--fg)}.update-log{margin:2rem 0 1rem;scroll-margin-top:80px}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}.table-wrap table{margin:0}.table-wrap td,.table-wrap th{white-space:nowrap}.tips{margin:1.4rem 0;padding:14px 18px;border-radius:var(--radius);background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent);max-width:80ch}.tips h2{display:flex;align-items:center;font-size:1rem;margin:0 0 .5rem}.tips ul{margin:0;padding-left:1.2rem}.tips li{margin:.25rem 0;color:var(--fg-2)}.tips-board{background:color-mix(in srgb,var(--c-power) 9%,var(--surface));border-color:color-mix(in srgb,var(--c-power) 30%,transparent)}.tips-board .h-icon{color:var(--c-power)}.list-section h2{margin-top:1.6rem}.family-list{display:grid;gap:14px}.family-card{padding:18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.fc-head{display:flex;align-items:center;gap:14px}.fc-head h2{margin:0;font-size:1.2rem}.fc-head p{margin:0}.fc-code{font-size:.95rem;font-weight:800;color:var(--accent-strong);background:var(--accent-soft);padding:.45em .65em}.family-card .prose{margin-top:.8rem}.spec-card{position:relative;margin:14px 0 1.2rem;padding:18px;border-radius:var(--radius);border:1px solid var(--border);background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 7%,transparent),transparent 55%),var(--surface);box-shadow:var(--shadow);overflow:hidden}.spec-card::after{content:"";position:absolute;right:-30px;top:-30px;width:160px;height:160px;background-image:radial-gradient(color-mix(in srgb,var(--accent) 35%,transparent) 1.5px,transparent 1.5px);background-size:12px 12px;opacity:.5;mask-image:radial-gradient(circle,#000 30%,transparent 70%);-webkit-mask-image:radial-gradient(circle,#000 30%,transparent 70%);pointer-events:none}.spec-top{display:flex;gap:14px;align-items:flex-start}.spec-title h1{margin:.15em 0 .4em;font-size:1.6rem}.spec-title .eyebrow{margin-top:.2rem}.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:1rem 0 0}.facts div{background:var(--bg-soft);border:1px solid var(--border);border-radius:10px;padding:8px 11px}.facts dt{font-size:.7rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:650}.facts dd{margin:0;font-weight:650;overflow-wrap:anywhere}.facts code{border:0;background:none;padding:0;color:var(--accent-strong);font-weight:750}.jump{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.jump a{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;font-size:.86rem;font-weight:600;text-decoration:none;color:var(--c);background:color-mix(in srgb,var(--c) 10%,transparent);border:1px solid color-mix(in srgb,var(--c) 25%,transparent)}.jump a b{color:var(--fg)}.jump-schematic{--c:var(--c-schematic)}.jump-boardview{--c:var(--c-boardview)}.jump-bios{--c:var(--c-bios)}.jump-document,.jump-archive{--c:var(--c-document)}.summary p{margin:0 0 .85rem;color:var(--fg-2)}.summary strong{color:var(--fg)}.files-section{scroll-margin-top:80px}.kind-head{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin:1.6rem 0 .7rem;scroll-margin-top:80px}.kh-icon{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;background:color-mix(in srgb,currentColor 12%,transparent)}.kind-head .count{font-size:.78rem;padding:2px 9px;border-radius:999px;background:var(--bg-soft);color:var(--muted);border:1px solid var(--border)}.kind-more{margin-left:auto;font-size:.82rem;font-weight:600;text-decoration:none}.files{list-style:none;margin:0;padding:0;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface)}.file{display:grid;grid-template-columns:auto 1fr;gap:10px 12px;padding:13px 14px;align-items:start}.file + .file{border-top:1px solid var(--border)}.file-icon{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:color-mix(in srgb,currentColor 11%,transparent)}.file-main{display:flex;flex-direction:column;gap:3px;min-width:0}.file-name{font-family:var(--mono);font-size:.86rem;word-break:break-all;color:var(--fg);font-weight:550}.file-meta{display:flex;flex-wrap:wrap;gap:3px 12px;font-size:.8rem;color:var(--muted)}.fm-rev{color:var(--fg-2);font-weight:600}.fmt{font-family:var(--mono);color:var(--c-boardview);font-weight:600}.file-alt{font-size:.8rem;color:var(--muted)}.file .btn{grid-column:1 / -1}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:10px;border:1px solid transparent;background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;font:inherit;font-size:.9rem;font-weight:650;text-decoration:none;cursor:pointer;white-space:nowrap;box-shadow:0 2px 8px color-mix(in srgb,var(--accent) 30%,transparent);transition:transform .15s,box-shadow .15s}.btn:hover{color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px color-mix(in srgb,var(--accent) 35%,transparent)}:root[data-theme="dark"] .btn,:root[data-theme="dark"] .btn:hover{color:#04221f}@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .btn,:root:not([data-theme="light"]) .btn:hover,:root:not([data-theme="light"]) .s-btn{color:#04221f}}.btn-ghost{background:var(--surface);color:var(--fg) !important;border-color:var(--border-strong);box-shadow:none}.btn-ghost:hover{border-color:var(--accent);box-shadow:none}.notes{padding-left:1.2rem;color:var(--fg-2)}.author-box{display:flex;gap:14px;align-items:flex-start;margin:2rem 0 1rem;padding:16px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-sm)}.author-box img{border-radius:50%;flex:none;background:var(--bg-sunk);border:2px solid var(--surface);box-shadow:0 0 0 2px var(--accent)}.author-box p{margin:0}.ab-kicker{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:700}.ab-name{font-weight:700}.ab-bio{font-size:.92rem;color:var(--fg-2);margin-top:2px !important}.ad{position:relative;min-height:280px;margin:2rem 0;padding-top:18px;display:flex;flex-direction:column;justify-content:center;background:var(--bg-soft);border-radius:12px;overflow:hidden}.ad-list_inline{min-height:250px;margin:12px 0}.ad-multiplex{min-height:320px}.ad-label{position:absolute;top:4px;left:10px;font-size:.66rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.read-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:60;pointer-events:none}.read-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.guide-head{margin:14px 0 1.6rem;max-width:820px}.guide-head h1{font-size:2rem;margin:.6rem 0 .5rem;line-height:1.15;letter-spacing:-.03em}.cat-pill{display:inline-flex;align-items:center;gap:6px;padding:5px 12px 5px 10px;border-radius:999px;font-size:.8rem;font-weight:700;text-decoration:none;color:var(--cc,var(--accent));background:color-mix(in srgb,var(--cc,var(--accent)) 11%,transparent);border:1px solid color-mix(in srgb,var(--cc,var(--accent)) 25%,transparent)}.byline-row{display:flex;align-items:center;gap:12px;margin-top:1rem}.byline-row img{border-radius:50%;background:var(--bg-sunk)}.byline a{font-weight:650;color:var(--fg);text-decoration:none}.byline .icon{margin-left:2px}.cat-tabs{display:flex;gap:6px;overflow-x:auto;padding-bottom:6px;margin:0 0 1.4rem;scrollbar-width:thin}.cat-tabs a{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:999px;border:1px solid var(--border);background:var(--surface);text-decoration:none;color:var(--fg-2);font-size:.9rem;font-weight:600;white-space:nowrap}.cat-tabs a .icon{color:var(--cc,var(--accent))}.cat-tabs a:hover{border-color:var(--cc,var(--accent))}.cat-tabs a[aria-current="page"]{background:var(--fg);color:var(--bg);border-color:var(--fg)}.cat-tabs a[aria-current="page"] .icon{color:inherit}.empty{padding:1.2rem;background:var(--bg-soft);border-radius:var(--radius);border:1px dashed var(--border-strong)}.prose{max-width:72ch}.prose p,.prose ul,.prose ol{margin:0 0 1.05rem}.prose li{margin:.3rem 0}.prose li::marker{color:var(--accent)}.prose h2{margin-top:2.3rem;padding-top:.2rem;scroll-margin-top:80px}.prose h3{scroll-margin-top:80px;margin-top:1.6rem}.article-body>p:first-child{font-size:1.08rem;color:var(--fg)}.prose blockquote{margin:1.4rem 0;padding:.8rem 1.1rem;border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 12px 12px 0;color:var(--fg-2)}.prose blockquote p:last-child{margin-bottom:0}.prose .callout-warn{border-left-color:var(--c-diagnostics);background:color-mix(in srgb,var(--c-diagnostics) 8%,var(--surface))}.prose .callout-tip{border-left-color:var(--c-components);background:color-mix(in srgb,var(--c-components) 8%,var(--surface))}.prose .callout-note{border-left-color:var(--c-schematic);background:color-mix(in srgb,var(--c-schematic) 7%,var(--surface))}.prose figure{margin:1.6rem 0}.prose figure svg{display:block;width:100%;height:auto;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);color:var(--fg)}.prose figcaption{font-size:.85rem;color:var(--muted);margin-top:.5rem;text-align:center}.table-wrap{overflow-x:auto;margin:0 0 1.3rem;border:1px solid var(--border);border-radius:12px;background:var(--surface)}table{border-collapse:collapse;width:100%;font-size:.92rem}th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--border);vertical-align:top}th{background:var(--bg-soft);font-weight:650;font-size:.85rem}tr:last-child td{border-bottom:0}tbody tr:hover td{background:color-mix(in srgb,var(--accent) 4%,transparent)}.guide-layout{display:block}.toc{margin:0 0 1.4rem;font-size:.92rem;max-width:72ch}.toc details{border:1px solid var(--border);border-radius:12px;padding:10px 16px;background:var(--surface)}.toc summary{cursor:pointer;font-weight:700;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.toc ol{margin:.6rem 0 .2rem;padding-left:1.2rem}.toc li{margin:.3rem 0}.toc a{color:var(--fg-2);text-decoration:none}.toc a:hover,.toc a.active{color:var(--accent-strong)}.toc a.active{font-weight:650}.guide-foot{max-width:900px}.prev-next{display:grid;gap:10px;margin:2rem 0 1rem}.prev-next a{display:flex;flex-direction:column;gap:4px;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;background:var(--surface);transition:border-color .15s}.prev-next a:hover{border-color:var(--accent)}.pn-label{font-size:.78rem;color:var(--muted);font-weight:600}.pn-title{color:var(--fg);font-weight:700}.pn-next{text-align:right}.pager{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;margin:1.6rem 0}.pg-pages{display:flex;flex-wrap:wrap;gap:4px}.pager a,.pg-cur,.pg-gap{display:inline-block;min-width:38px;padding:7px 11px;text-align:center;border:1px solid var(--border);border-radius:10px;text-decoration:none;font-size:.9rem;background:var(--surface)}.pager a:hover{border-color:var(--accent)}.pg-cur{background:var(--fg);border-color:var(--fg);color:var(--bg);font-weight:750}.pg-gap{border-color:transparent;background:none}.contact-form{display:grid;gap:12px;max-width:540px;margin:0 0 1rem}.contact-form label{display:grid;gap:5px;font-weight:650;font-size:.92rem}.contact-form input,.contact-form textarea,.contact-form select{font:inherit;font-weight:400;padding:10px 12px;color:var(--fg);background:var(--surface);border:1px solid var(--border-strong);border-radius:10px}.contact-form input:focus,.contact-form textarea:focus,.contact-form select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent)}.contact-form button{justify-self:start}.sitemap-cols,.nf-cols{display:grid;gap:1rem 2rem}.sitemap-cols ul ul{margin:.2rem 0 .4rem;padding-left:1rem;font-size:.92rem}.static-page .prose h2{font-size:1.25rem}.site-footer{margin-top:4rem;border-top:1px solid var(--border);background:var(--bg-soft);padding:2.2rem 0 1.6rem;font-size:.92rem}.footer-grid{display:grid;gap:1.6rem}.footer-about p{color:var(--fg-2);max-width:46ch}.footer-note{font-size:.85rem;color:var(--muted) !important}.site-footer h2{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 .7rem}.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}.site-footer nav a{color:var(--fg-2);text-decoration:none}.site-footer nav a:hover{color:var(--link);text-decoration:underline}.copy{color:var(--muted);margin:1.6rem 0 0;padding-top:1rem;border-top:1px solid var(--border);font-size:.85rem}.topic-electrical-basics{--cc:var(--c-power);color:var(--c-power)}.topic-passive-components{--cc:var(--c-components);color:var(--c-components)}.topic-semiconductors{--cc:var(--c-bios);color:var(--c-bios)}.topic-power{--cc:var(--c-diagnostics);color:var(--c-diagnostics)}.topic-signals-and-buses{--cc:var(--c-schematic);color:var(--c-schematic)}.topic-board-anatomy{--cc:var(--c-boardview);color:var(--c-boardview)}.topic-firmware{--cc:var(--c-brands);color:var(--c-brands)}.topic-tools-and-measurement{--cc:var(--c-tools);color:var(--c-tools)}.topic-grid a{color:var(--fg)}.az-nav{position:sticky;top:64px;z-index:5;display:flex;flex-wrap:wrap;gap:4px;margin:1.6rem 0 1rem;padding:8px;border-radius:12px;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(8px);border:1px solid var(--border)}.az-nav a{min-width:32px;text-align:center;padding:4px 8px;border-radius:8px;text-decoration:none;font-weight:700;font-size:.9rem;color:var(--fg-2)}.az-nav a:hover{background:var(--accent-soft);color:var(--accent-strong)}.az-group{scroll-margin-top:130px}.az-letter{font-size:1.6rem;margin:1.6rem 0 .6rem;color:var(--accent-strong);font-family:var(--mono)}.az-group ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}.az-group a{display:flex;flex-direction:column;padding:9px 12px;border-radius:10px;border:1px solid var(--border);background:var(--surface);text-decoration:none;color:var(--fg);transition:border-color .15s}.az-group a:hover{border-color:var(--accent)}.az-term{font-weight:700}.az-short{font-size:.85rem;color:var(--muted)}.term-cards{list-style:none;margin:0;padding:0;display:grid;gap:10px}.term-cards a{display:flex;flex-direction:column;gap:4px;height:100%;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);text-decoration:none;color:var(--fg);box-shadow:var(--shadow-sm);transition:border-color .15s,transform .15s}.term-cards a:hover{border-color:var(--accent);transform:translateY(-2px)}.tcard-term{font-weight:750}.tcard-short{font-size:.88rem;color:var(--fg-2);line-height:1.45}.term-def{font-size:1.15rem;line-height:1.55;color:var(--fg);margin:.4rem 0 1rem;padding:14px 18px;border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 12px 12px 0;max-width:72ch}.term-facts{display:flex;flex-wrap:wrap;gap:8px;margin:0}.term-facts div{padding:6px 12px;border-radius:10px;background:var(--bg-soft);border:1px solid var(--border)}.term-facts dt{font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:700}.term-facts dd{margin:0;font-weight:650;font-size:.92rem}.tcat-electrical{--cc:var(--c-schematic)}.tcat-components{--cc:var(--c-components)}.tcat-power{--cc:var(--c-power)}.tcat-battery{--cc:var(--c-tools)}.tcat-firmware{--cc:var(--c-bios)}.tcat-pcb{--cc:var(--c-boardview)}.tool-cards{list-style:none;margin:0;padding:0;display:grid;gap:10px}.tool-cards a{display:flex;gap:12px;align-items:flex-start;height:100%;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);text-decoration:none;color:var(--fg);box-shadow:var(--shadow-sm);transition:border-color .15s,transform .15s}.tool-cards a:hover{border-color:var(--cc,var(--accent));transform:translateY(-2px)}.tool-cards a.tc-electrical{--cc:var(--c-schematic)}.tool-cards a.tc-components{--cc:var(--c-components)}.tool-cards a.tc-power{--cc:var(--c-power)}.tool-cards a.tc-battery{--cc:var(--c-tools)}.tool-cards a.tc-firmware{--cc:var(--c-bios)}.tool-cards a.tc-pcb{--cc:var(--c-boardview)}.tc-icon{flex:none;display:grid;place-items:center;width:38px;height:38px;border-radius:11px;color:var(--cc,var(--accent));background:color-mix(in srgb,var(--cc,var(--accent)) 12%,transparent)}.tc-icon .icon{width:20px;height:20px}.tc-body{display:flex;flex-direction:column;gap:3px;min-width:0}.tc-title{font-weight:720;line-height:1.3}.tc-short{font-size:.87rem;color:var(--fg-2);line-height:1.45}.tool-cat{margin:0 0 2.2rem;scroll-margin-top:90px}.tool-cat .section-head p{margin:.2rem 0 0}.tool-note{margin-top:2.5rem}.calc{--cc:var(--accent);margin:0 0 2rem;max-width:900px;border:1px solid var(--border);border-top:4px solid var(--cc);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);overflow:hidden}.calc-form{padding:18px 18px 6px}.calc-fields{display:grid;gap:14px 16px;grid-template-columns:1fr}.calc-field{display:flex;flex-direction:column;gap:6px;min-width:0}.calc-field[hidden]{display:none}.calc-field label{font-size:.85rem;font-weight:680;color:var(--fg-2)}.calc-input{display:flex;min-width:0}.calc-field input[type="text"],.calc-field select,.calc-field textarea{width:100%;min-width:0;height:44px;padding:0 12px;font:inherit;font-size:1rem;color:var(--fg);background:var(--bg-soft);border:1px solid var(--border-strong);border-radius:10px;transition:border-color .15s,box-shadow .15s}.calc-field textarea{height:auto;min-height:80px;padding:10px 12px;resize:vertical;font-family:var(--mono);font-size:.92rem}.calc-field input[type="file"]{font:inherit;font-size:.9rem;padding:10px;border:1px dashed var(--border-strong);border-radius:10px;background:var(--bg-soft);width:100%}.calc-input.has-unit input{border-radius:10px 0 0 10px}.calc-input select,.calc-unit{flex:none;width:auto;max-width:42%;border-radius:0 10px 10px 0 !important;border-left:0 !important;background:var(--bg-sunk) !important;font-weight:650}.calc-unit{display:inline-flex;align-items:center;padding:0 12px;border:1px solid var(--border-strong);color:var(--fg-2);font-size:.95rem}.calc-field input:focus,.calc-field select:focus,.calc-field textarea:focus{outline:none;border-color:var(--cc);box-shadow:0 0 0 3px color-mix(in srgb,var(--cc) 20%,transparent)}.calc-field input[aria-invalid="true"]{border-color:var(--c-diagnostics)}.calc-help{font-size:.78rem;color:var(--muted);line-height:1.4}.calc-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding:14px 0 10px}.btn-sm{padding:7px 12px;font-size:.85rem}.calc-privacy{display:inline-flex;align-items:center;gap:6px;font-size:.8rem;color:var(--muted)}.calc-privacy .icon{width:15px;height:15px;color:var(--c-components)}.calc-results{padding:16px 18px 18px;background:color-mix(in srgb,var(--cc) 6%,var(--bg-soft));border-top:1px solid var(--border);transition:opacity .15s}.calc-results.is-busy{opacity:.55}.calc-h{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:0 0 .7rem}.calc-out{display:grid;grid-template-columns:1fr;gap:8px;margin:0}.calc-out>div{padding:10px 12px;border-radius:10px;background:var(--surface);border:1px solid var(--border);min-width:0}.calc-out dt{font-size:.74rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.calc-out dd{margin:2px 0 0;font-size:1.15rem;font-weight:750;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.calc-note{margin:.8rem 0 0;padding:9px 12px;border-radius:10px;font-size:.9rem;color:var(--fg-2);background:var(--surface);border-left:3px solid var(--cc)}.calc-results.is-warn .calc-note{border-left-color:var(--c-diagnostics);background:color-mix(in srgb,var(--c-diagnostics) 8%,var(--surface));color:var(--fg)}.calc-extra:empty{display:none}.calc-extra{margin-top:.9rem}.calc-extra .table-wrap{margin:0}.calc-table td,.calc-table th{white-space:nowrap}.calc-table tr.hl td{background:color-mix(in srgb,var(--cc) 14%,transparent);font-weight:700}.calc-sub{font-size:.8rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin:.8rem 0 .4rem}.calc-links{list-style:none;margin:0;padding:0;display:grid;gap:4px;font-size:.92rem}.calc-formula{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:baseline;margin:0;padding:12px 18px;border-top:1px solid var(--border);font-size:.9rem}.calc-formula span{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.calc-formula code{font-family:var(--mono);background:none;padding:0;color:var(--fg);overflow-wrap:anywhere}.calc-noscript{margin:0;padding:12px 18px;color:var(--c-diagnostics)}.resistor-pic{padding:14px 0 4px}.rp-body{display:inline-flex;gap:9px;align-items:stretch;height:44px;padding:0 24px;border-radius:22px;background:#d9c09a;box-shadow:inset 0 -6px 10px rgba(0,0,0,.12);position:relative}.rp-body::before,.rp-body::after{content:"";position:absolute;top:50%;width:30px;height:3px;background:#9aa1a8}.rp-body::before{right:100%}.rp-body::after{left:100%}.rp-band{width:10px;border-left:1px solid rgba(0,0,0,.12);border-right:1px solid rgba(0,0,0,.12)}.rp-gap{margin-left:16px}.tool-body{margin-top:.5rem}@media (min-width: 560px){.tool-cards{grid-template-columns:repeat(2,1fr)}.calc-fields{grid-template-columns:repeat(2,1fr)}.calc-field.calc-wide{grid-column:1 / -1}.calc-out{grid-template-columns:repeat(2,1fr)}.hero-stats{grid-template-columns:repeat(5,1fr)}.brand-tiles{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:repeat(2,1fr)}.code-grid{grid-template-columns:repeat(2,1fr)}.cat-grid{grid-template-columns:repeat(2,1fr)}.facts{grid-template-columns:repeat(3,1fr)}.prev-next{grid-template-columns:1fr 1fr}.term-cards{grid-template-columns:repeat(2,1fr)}.az-group ul{grid-template-columns:repeat(2,1fr)}}@media (min-width: 760px){h1{font-size:2.2rem}.site-header .logo .logo-text{display:flex}.hero h1{font-size:2.8rem}.type-cards{grid-template-columns:repeat(3,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.explain-grid{grid-template-columns:repeat(3,1fr)}.board-list a{grid-template-columns:auto 1fr auto}.board-list .mark{grid-row:auto}.bl-meta{justify-content:flex-end;flex-wrap:nowrap}.file{grid-template-columns:auto 1fr auto;align-items:center}.file .btn{grid-column:auto}.sitemap-cols,.nf-cols{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}.about-strip{grid-template-columns:1.4fr 1fr;padding:2rem}.spec-card{padding:24px}.spec-title h1{font-size:2rem}.guide-head h1{font-size:2.5rem}}@media (min-width: 980px){.header-row .search{max-width:480px;margin-left:auto}.hero-grid{grid-template-columns:1.1fr .9fr;padding-top:3.2rem}.hero-visual{display:block}.hero h1{font-size:3.2rem}.brand-tiles{grid-template-columns:repeat(3,1fr)}.card-grid{grid-template-columns:repeat(3,1fr)}.code-grid{grid-template-columns:repeat(4,1fr)}.cat-grid{grid-template-columns:repeat(4,1fr)}.steps{grid-template-columns:repeat(4,1fr)}.steps li{padding:62px 16px 16px}.facts{grid-template-columns:repeat(6,1fr)}.guide-list{grid-template-columns:repeat(2,1fr)}.term-cards{grid-template-columns:repeat(3,1fr)}.term-cards-sm{grid-template-columns:repeat(2,1fr)}.az-group ul{grid-template-columns:repeat(3,1fr)}.tool-cards{grid-template-columns:repeat(3,1fr)}.guide-foot .tool-cards{grid-template-columns:repeat(2,1fr)}.calc-out{grid-template-columns:repeat(3,1fr)}.guide-layout.has-toc{display:grid;grid-template-columns:minmax(0,72ch) 250px;gap:3rem;align-items:start}.guide-layout.has-toc .toc{order:2;position:sticky;top:90px;max-height:calc(100vh - 110px);overflow-y:auto;margin:0}.guide-layout.has-toc .toc details{border:0;background:none;padding:0 0 0 16px;border-left:2px solid var(--border);border-radius:0}.guide-layout.has-toc .prose{order:1}}@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation:none !important;transition:none !important;scroll-behavior:auto !important}.hb-signal{display:none}}@media print{.site-header,.site-footer,.ad,.toc,.btn,.search,.read-progress{display:none !important}}