@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--radius-md:.375rem;--radius-lg:.5rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color 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components;@layer utilities{.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.container{width:100%}@media(min-width:40rem){.container{max-width:40rem}}@media(min-width:48rem){.container{max-width:48rem}}@media(min-width:64rem){.container{max-width:64rem}}@media(min-width:80rem){.container{max-width:80rem}}@media(min-width:96rem){.container{max-width:96rem}}.hidden{display:none}}:root{--color-bg-primary:#fff;--color-bg-secondary:#f8fafc;--color-bg-accent-soft:#eff6ff;--color-text-primary:#0f172a;--color-text-secondary:#64748b;--color-text-muted:#94a3b8;--color-accent:#2563eb;--color-accent-hover:#1d4ed8;--color-success:#15803d;--color-danger:#b91c1c;--color-border:#e2e8f0;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-2xl:48px;--spacing-3xl:72px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--font-sans:Inter, "Noto Sans SC", "PingFang SC", 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var(--color-border);z-index:20;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffff5;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;min-height:72px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:10px;font-size:21px;font-weight:700;display:inline-flex}.brand-mark{background:var(--color-accent);color:#fff;letter-spacing:-.04em;border-radius:9px;place-items:center;width:34px;height:34px;font-size:12px;font-weight:800;display:grid}.primary-nav{align-items:center;gap:34px;font-size:15px;font-weight:550;display:flex}.primary-nav a{color:var(--color-text-secondary)}.primary-nav a:hover,.primary-nav a[aria-current=page]{color:var(--color-text-primary)}.primary-nav .nav-login{color:var(--color-accent)}.home-hero{text-align:center;padding:72px 0 36px}.home-hero h1,.tool-heading h1,.purchase-heading h1{letter-spacing:-.045em;margin:0;font-size:clamp(36px,5vw,52px);line-height:1.15}.home-hero p,.tool-heading 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var(--color-border);color:var(--color-text-secondary);font-size:13px}.footer-inner{justify-content:space-between;align-items:center;gap:24px;min-height:74px;display:flex}@media(max-width:760px){.container{width:min(100% - 32px,1120px)}.header-inner{min-height:62px}.brand-mark{display:none}.brand{font-size:19px}.primary-nav{gap:20px}.primary-nav a:first-child,.primary-nav a:nth-child(2){display:none}.home-hero{padding:44px 0 26px}.home-hero h1,.tool-heading h1,.purchase-heading h1{font-size:32px}.home-hero p,.tool-heading p,.purchase-heading p{font-size:15px}.category-tabs{justify-content:flex-start;gap:28px}.tool-list{grid-template-columns:1fr}.tool-row{grid-template-columns:36px 1fr 20px;gap:12px;min-height:82px}.tool-row>a{color:#0000;width:20px;overflow:hidden}.tool-row>a:after{content:"›";color:var(--color-text-secondary);font-size:24px}.api-referral{flex-direction:column;align-items:flex-start;margin:52px 0;padding:26px 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