/* Luthier Hub V4. Page-scoped editorial composition, no new fonts or assets. */
.hub-v4{--hub-paper:#f0ede4;--hub-muted:#b7b4a8;--hub-gold:#c9ad74;--hub-rule:#393a32;background:#141511;color:var(--hub-paper);overflow-wrap:anywhere}.hub-wrap{width:min(1380px,calc(100% - 80px));margin-inline:auto;box-sizing:border-box}.hub-v4 :is(h1,h2,h3){font-family:var(--sans,'Space Grotesk',sans-serif);font-weight:500;letter-spacing:-.045em;color:var(--hub-paper);max-width:none;border:0;padding:0}.hub-v4 h1{font-size:clamp(48px,5.6vw,88px);line-height:1.02;margin:26px 0 30px}.hub-v4 h2{font-size:clamp(34px,4vw,60px);line-height:1.08;margin:18px 0 24px}.hub-v4 h3{font-size:25px;line-height:1.25;margin:12px 0 18px}.hub-v4 em{font-style:normal;color:var(--hub-gold)}.hub-v4 p{font-size:15px;line-height:1.8;color:var(--hub-muted)}.hub-v4 .hub-kicker{font:11px/1.7 var(--mono,'JetBrains Mono',monospace);color:var(--hub-gold);letter-spacing:.12em;text-transform:uppercase;margin:0}.hub-v4 a{color:inherit;text-decoration:none;text-underline-offset:5px}.hub-v4 a:focus-visible,.hub-v4 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0}.hub-learning-path li{counter-increment:hub-step;display:grid;grid-template-columns:25px minmax(0,1fr);gap:9px;align-items:center;border-top:1px solid var(--hub-rule)}.hub-learning-path li::before{content:counter(hub-step,decimal-leading-zero);font:10px var(--mono,monospace);color:var(--hub-gold)}.hub-learning-path li a{min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;line-height:1.6;padding:8px 0}.hub-learning-path li a:hover{text-decoration:underline}.hub-path-tool a{display:inline-flex;align-items:center;min-height:44px;color:var(--hub-gold);text-decoration:underline;font-size:13px}.hub-tools-strip{padding-block:62px;border-block:1px solid var(--hub-rule);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:70px}.hub-tools-strip>.hub-kicker{grid-column:1/-1}.hub-tools-strip h2{font-size:clamp(30px,3.6vw,52px)}.hub-tools-strip>p:not(.hub-kicker){align-self:center;max-width:47ch}.hub-tools-strip p a{color:var(--hub-gold);text-decoration:underline;display:inline-block;min-height:44px;line-height:44px}.hub-tools-strip>.hub-link{grid-column:2;justify-self:start}.hub-library{border-top:0}.hub-library h2{font-size:clamp(32px,3.5vw,48px);margin:0 0 28px}.hub-library .hub-search{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:10px 24px;max-width:none;background:none;border:0;padding:0}.hub-search label{color:var(--hub-muted);font-size:12px}.hub-search label[for=hub-search]{grid-column:1;grid-row:1}.hub-search #hub-search{grid-column:1;grid-row:2}.hub-search label[for=hub-topic]{grid-column:2;grid-row:1}.hub-search #hub-topic{grid-column:2;grid-row:2}.hub-search :is(input,select){width:100%;min-width:0;min-height:48px;border:1px solid #5c5e4f;border-radius:0;background:#1b1e17;color:var(--hub-paper);padding:12px;font:14px var(--sans,sans-serif)}.hub-library #hub-count{font:11px var(--mono,monospace);margin:18px 0 26px;color:var(--hub-muted)}.hub-library-rows{display:block}.hub-library .hub-card{display:grid;grid-template-columns:175px minmax(0,1fr) minmax(0,1fr);align-items:center;gap:16px 35px;padding:22px 0;background:none;border:0;border-top:1px solid var(--hub-rule);border-radius:0;box-shadow:none}.hub-library .hub-card .eyebrow{margin:0;font:10px/1.7 var(--mono,monospace);letter-spacing:.04em;color:var(--hub-gold)}.hub-library .hub-card h3{font-size:18px;letter-spacing:-.02em;margin:0}.hub-library .hub-card h3 a{display:flex;align-items:center;min-height:44px}.hub-library .hub-card h3 a:hover{text-decoration:underline}.hub-library .hub-card>p:last-child{font-size:13px;margin:0}.hub-closing{border-top:1px solid var(--hub-rule);padding-block:50px 80px}.hub-closing>p:last-child{font-size:clamp(28px,3vw,44px);letter-spacing:-.03em;line-height:1.3;color:var(--hub-paper);margin:18px 0 0}
@media(max-width:1024px){.hub-wrap{width:calc(100% - 48px)}.hub-hero{gap:20px;min-height:580px;padding-block:48px}.hub-v4 h1{font-size:clamp(48px,6.7vw,72px)}.hub-section-heading{gap:0 35px}.hub-learning-paths{gap:24px;grid-template-columns:repeat(3,minmax(0,1fr))}.hub-learning-path h3{font-size:21px}.hub-intent-body{gap:28px;padding-right:25px}.hub-library .hub-card{grid-template-columns:120px minmax(0,1fr);gap:8px 25px}.hub-library .hub-card>p:last-child{grid-column:2}.hub-signal-panels section,.hub-tools-strip{column-gap:35px}.hub-section,.hub-signal-section{padding-block:64px}}
@media(max-width:768px){.hub-wrap{width:calc(100% - 40px)}.hub-hero{grid-template-columns:minmax(0,1fr);padding-block:36px 48px;gap:32px;min-height:0}.hub-v4 h1{font-size:clamp(48px,9vw,70px);margin:20px 0 24px}.hub-hero-art{max-width:520px;justify-self:center;width:100%}.hub-component-study{max-height:360px}.hub-section-heading{grid-template-columns:minmax(0,1fr);gap:20px}.hub-section-heading h2{margin:0}.hub-section-heading>p:last-child{margin:0}.hub-v4 h2{font-size:clamp(34px,7vw,48px)}.hub-intent>summary{grid-template-columns:24px minmax(0,1fr) 22px;gap:12px;min-height:98px;padding:20px 0}.hub-intent-name{font-size:24px}.hub-intent-name small{font-size:12px}.hub-intent-body{grid-template-columns:minmax(0,1fr);gap:18px;padding:0 0 24px 36px}.hub-section,.hub-signal-section{padding-block:48px}.hub-signal-steps{grid-template-columns:repeat(3,minmax(0,1fr));border-bottom:0}.hub-signal-steps a{font-size:12px;padding:10px 8px;min-height:64px;border-bottom:1px solid #4a4d3c}.hub-signal-steps a:nth-child(3){border-right:0}.hub-signal-drawing{margin:10px 0 24px;min-width:0}.hub-signal-panels section{grid-template-columns:minmax(0,1fr);gap:0}.hub-signal-links{grid-column:1;grid-row:auto;margin-top:20px}.hub-signal-panels.is-enhanced{min-height:360px}.hub-learning-paths{grid-template-columns:minmax(0,1fr);gap:40px}.hub-learning-path h3{font-size:26px}.hub-learning-path>p:not(.hub-kicker){min-height:0}.hub-learning-path li a{min-height:52px}.hub-tools-strip{grid-template-columns:minmax(0,1fr);padding-block:46px;gap:0}.hub-tools-strip>.hub-link{grid-column:1}.hub-library .hub-card{grid-template-columns:minmax(0,1fr);gap:5px;padding-block:20px}.hub-library .hub-card>p:last-child{grid-column:1}.hub-library .hub-search{gap:10px;grid-template-columns:minmax(0,1fr)}.hub-search label[for=hub-topic]{grid-column:1;grid-row:3;margin-top:10px}.hub-search #hub-topic{grid-column:1;grid-row:4}.hub-closing{padding-block:36px 60px}}
@media(max-width:390px){.hub-wrap{width:calc(100% - 32px)}.hub-v4 h1{font-size:48px;letter-spacing:-.055em}.hub-intent-name{font-size:21px}.hub-signal-panels.is-enhanced{min-height:405px}.hub-hero .hub-lede{font-size:15px}.hub-component-study{max-height:280px}}
@media(prefers-reduced-motion:reduce){.hub-v4 *, .hub-v4 *::before, .hub-v4 *::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.hub-link:hover span{transform:none}.hub-signal-panels{min-height:0!important}}
@media print{.hub-v4{background:#fff;color:#111}.hub-v4 :is(h1,h2,h3,p,a){color:#111}.hub-wrap{width:100%}.hub-hero{min-height:0}.hub-hero-art{display:none}.hub-signal-panels [hidden],.hub-intent-body{display:block!important}.hub-signal-panels{min-height:0!important}.hub-section,.hub-signal-section{padding-block:24px}.hub-signal-steps,.hub-search{display:none!important}}

/* Hero V4.1: separate physical studies; labels never scale with the artwork. */
.hero-v41 .hub-study-heading{padding:4px 0 20px}.hero-v41 .hub-study-parts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px}.hero-v41 .hub-study-part{min-width:0;border-top:1px solid var(--hub-rule);padding:14px 0 10px;display:flex;flex-direction:column;justify-content:space-between}.hero-v41 [data-study-part=pickup]{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);align-items:center;gap:20px;padding-block:18px 24px}.hero-v41 .hub-study-label{font:11px/1.6 var(--mono,monospace);letter-spacing:.04em;color:var(--hub-gold)}.hero-v41 .hub-study-label small{display:block;font:11px/1.6 var(--sans,sans-serif);letter-spacing:0;color:var(--hub-muted);margin-top:5px}.hero-v41 .hub-study-object{height:142px;max-height:none;max-width:100%;margin:12px auto 0;overflow:visible}.hero-v41 [data-study-part=pickup] .hub-study-object{height:145px;margin:0}.hero-v41 :is([data-study-part=capacitor],[data-study-part=output]) .hub-study-object{height:95px}.hero-v41 .blade-lever-pointer{fill:#e3c686;stroke:#697063}.hero-v41 .hub-study-object .part-value{font-size:12px}.hero-v41 .pickup-cable{display:none}.hero-v41 figcaption{margin-top:10px}
@media(max-width:1024px) and (min-width:769px){.hero-v41 .hub-study-parts{gap:0 16px}.hero-v41 [data-study-part=pickup]{grid-template-columns:minmax(0,1fr);gap:12px}.hero-v41 [data-study-part=pickup] .hub-study-object{height:120px}.hero-v41 .hub-study-object{height:125px}}
@media(max-width:390px){.hero-v41 .hub-study-parts{gap:0 16px}.hero-v41 [data-study-part=pickup]{grid-template-columns:minmax(0,1fr);gap:12px}.hero-v41 [data-study-part=pickup] .hub-study-object{height:130px}.hero-v41 .hub-study-object{height:130px}.hero-v41 .hub-study-label{font-size:11px}}
/* Shared physical vocabulary, reduced detail for educational recognition. */
.hub-component-study :is(.metal,.blade-frame,.blade-mounting-ear,.blade-lever,.blade-spindle){fill:#b8b6ad;stroke:#5e625e;stroke-width:1.8}
.hub-component-study :is(.board,.blade-wafer){fill:#463d31;stroke:#88734d;stroke-width:1.8}
.hub-component-study :is(.blade-lug,.switch-lug,.switch-leaf){fill:#b29964;stroke:#6e5934;stroke-width:1.6}
.hub-component-study .lug-hole{fill:#22251f;stroke:#8b784e;stroke-width:1}
.hub-component-study :is(.rim,.blade-wafer-detail,.blade-lever-slot,.blade-wafer-seam,.resistor-band){fill:none;stroke:#707368;stroke-width:1.5}
.hub-component-study .common-lug{stroke-width:3}
.hub-component-study :is(.micro,.coil-label,.terminal-label,.blade-terminal-label,.blade-bank-label,.blade-caption,.blade-orientation){display:none}
.hub-study-part{transition:background .18s ease}.hub-study-part:hover,.hub-study-part:focus-within{background:#ffffff08}
.hub-intent summary:focus-visible,.hub-guide a:focus-visible,.hub-study-part a:focus-visible{outline:2px solid #c5ab77;outline-offset:4px}
@media(prefers-reduced-motion:reduce){.hub-study-part{transition:none}}
/* V2 study scale: meaningful component size without changing editorial hierarchy. */
.hero-v41 .hub-study-object{--art-paper:#22251f;--art-metal:#b8bdb2}.hero-v41 [data-study-part=capacitor] .hub-study-object{height:128px}.hero-v41 [data-study-part=output] .hub-study-object{height:128px}.hero-v41 [data-study-part=selector] .hub-study-object{height:150px}.hero-v41 .hub-study-object .part-value{fill:#d8caac;font-size:12px}
@media(max-width:390px){.hero-v41 :is([data-study-part=capacitor],[data-study-part=output]) .hub-study-object{height:112px}}

/* SHARED ARTWORK V2 START */
[data-artwork-system="v2"] .metal,[data-artwork-system="v2"] .blade-frame,[data-artwork-system="v2"] .switch-frame{fill:var(--art-metal,#c7cbc4);stroke:#646c62;stroke-width:1.8}[data-artwork-system="v2"] .pickup-base{fill:var(--art-metal,#c7cbc4);stroke:#646c62;stroke-width:1.8}[data-artwork-system="v2"] .bobbin-dark{fill:#303632;stroke:#687165;stroke-width:1.8}[data-artwork-system="v2"] .bobbin-light{fill:#c9b68d;stroke:#80714e;stroke-width:1.8}[data-artwork-system="v2"] .screw{fill:#b6beb3;stroke:#646c62;stroke-width:1.3}[data-artwork-system="v2"] .screw-slot{stroke:#4d554b;stroke-width:1.5}[data-artwork-system="v2"] .lead{fill:none;stroke:#858c81;stroke-width:2.5}[data-artwork-system="v2"] .cap-body{fill:#bc7643;stroke:#825638;stroke-width:1.8}[data-artwork-system="v2"] .resistor-body{fill:#cbbb98;stroke:#857558;stroke-width:1.8}[data-artwork-system="v2"] .rim{fill:none;stroke:#87917f;stroke-width:1.4}[data-artwork-system="v2"] .jack-hole,[data-artwork-system="v2"] .lug-hole{fill:var(--art-paper,#f3f1eb);stroke:#747f6c;stroke-width:1}[data-artwork-system="v2"] .switch-leaf{fill:none;stroke:#858c81;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}[data-artwork-system="v2"] .switch-lug{fill:var(--art-metal,#c7cbc4);stroke:#80714f;stroke-width:1.8}[data-artwork-system="v2"] .board{fill:#b29b72;stroke:#80714f;stroke-width:1.8}[data-artwork-system="v2"] .blade-stationary-contacts{stroke-width:2}[data-artwork-system="v2"] .blade-wiper{stroke-width:4.5}[data-artwork-system="v2"] .blade-lever{stroke-width:1.8}[data-artwork-mode="editorial"] .blade-lug{fill:#b29967;stroke:#80714f;stroke-width:1.8}[data-artwork-mode="editorial"] :is(.blade-lever,.blade-pivot-arm){fill:#a8afa1;stroke:#646c62;stroke-width:1.8}[data-artwork-mode="editorial"] .blade-lever-pointer{fill:#a18e66;stroke:#80714f;stroke-width:1.4}[data-artwork-mode="editorial"] :is(.blade-wafer-detail,.blade-wafer-seam,.blade-lever-slot){fill:none;stroke:#968464;stroke-width:1.4}
/* SHARED ARTWORK V2 END */
/* Additive V1 category access. Preserve the interactive V4 presentation above. */
.hub-v4 .hub-knowledge-access{padding-block:40px;border-top:1px solid var(--hub-rule);background:var(--ui-bg);color:var(--ui-ink)}
.hub-v4 .hub-knowledge-access ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:16px 32px}
.hub-v4 .hub-knowledge-access a{display:inline-block;min-height:44px;padding-block:10px;color:var(--hub-gold)}
.hub-v4 .hub-knowledge-access p{max-width:76ch;line-height:1.8;color:var(--hub-muted)}