:root{--cat-vowel: #E78A37;--cat-vowel-soft: rgba(231, 138, 55, .06);--cat-vowel-edge: rgba(231, 138, 55, .18);--cat-consonant: #6949FF;--cat-consonant-soft: rgba(105, 73, 255, .05);--cat-consonant-edge: rgba(105, 73, 255, .16);--cat-rule: #C99800;--cat-rule-soft: rgba(255, 193, 7, .08);--cat-rule-edge: rgba(255, 193, 7, .22);--cat-compare: #1F8A5B;--cat-compare-soft: rgba(31, 138, 91, .06);--cat-compare-edge: rgba(31, 138, 91, .18)}.hub-hero{background:var(--hero-bg);color:#fff;padding:32px 0 80px;position:relative;overflow:hidden}.hub-hero .wrap{position:relative;z-index:1}.hub-hero h1{font-family:var(--font-sans);font-weight:800;font-size:clamp(48px,7.4vw,92px);line-height:.95;letter-spacing:-.035em;color:#fff;margin:18px 0 28px;text-wrap:balance;max-width:920px}.hub-hero h1 .ipa-mark{font-family:var(--font-ipa);font-weight:800;background:#fff;color:var(--brand-ink);padding:0 .16em .04em;border-radius:.12em;display:inline-block;transform:rotate(-1deg);box-shadow:0 6px 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var(--brand-orange))}.why-card[data-cat=vowel]{--c: var(--cat-vowel)}.why-card[data-cat=consonant]{--c: var(--cat-consonant)}.why-card[data-cat=rule]{--c: var(--cat-rule)}.why-card[data-cat=compare]{--c: var(--cat-compare)}.why-card .why-head{display:flex;align-items:baseline;gap:12px;margin-bottom:12px;flex-wrap:wrap}.why-card .why-head h3{font-size:22px;font-weight:800;letter-spacing:-.01em;color:var(--brand-ink);margin:0}.why-card .why-count{font-family:var(--font-sans);font-weight:800;font-size:14px;color:var(--c);background:var(--c-soft, var(--cat-vowel-soft));padding:4px 10px;border-radius:var(--radius-pill);border:1px solid var(--c-edge, var(--cat-vowel-edge))}.why-card[data-cat=vowel] .why-count{background:var(--cat-vowel-soft);border-color:var(--cat-vowel-edge)}.why-card[data-cat=consonant] .why-count{background:var(--cat-consonant-soft);border-color:var(--cat-consonant-edge)}.why-card[data-cat=rule] 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a.method-link:hover{text-decoration:underline}.constellation{position:absolute;bottom:12px;right:24px;width:96px;height:64px;pointer-events:none;opacity:.5}.cat-chip{display:inline-flex;align-items:center;gap:6px;background:var(--c-soft);color:var(--c);border:1px solid var(--c-edge);padding:3px 10px;border-radius:var(--radius-pill);font-size:12px;font-weight:800;letter-spacing:.5px;text-transform:uppercase}.cat-chip[data-cat=vowel]{--c: var(--cat-vowel);--c-soft: var(--cat-vowel-soft);--c-edge: var(--cat-vowel-edge)}.cat-chip[data-cat=consonant]{--c: var(--cat-consonant);--c-soft: var(--cat-consonant-soft);--c-edge: var(--cat-consonant-edge)}.cat-chip[data-cat=rule]{--c: var(--cat-rule);--c-soft: var(--cat-rule-soft);--c-edge: var(--cat-rule-edge)}.cat-chip[data-cat=compare]{--c: var(--cat-compare);--c-soft: var(--cat-compare-soft);--c-edge: 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