:root{--rh-black:#050505;--rh-surface:#0a0a0b;--rh-surface-2:#0f0f11;--rh-line:#ffffff16;--rh-line-soft:#ffffff0e;--rh-text:#f1f1f0;--rh-muted:#89898e;--rh-faint:#5f5f64;--rh-violet:#a78bfa;--rh-violet-2:#c4b5fd}.rh-arena-page,.rh-projects-page,.rh-campaign-page,.rh-stats-page{min-height:100vh;color:var(--rh-text);background:#050505;font-family:Inter,ui-sans-serif,system-ui,sans-serif}.rh-tool-header{border-bottom:1px solid var(--rh-line-soft);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);z-index:50;background:#050505f0;align-items:center;gap:30px;height:64px;padding:0 24px;display:flex;position:sticky;top:0}.rh-tool-brand{color:#fff;letter-spacing:-.04em;white-space:nowrap;align-items:center;gap:9px;font-size:14px;font-weight:760;text-decoration:none;display:flex}.rh-tool-brand img{width:30px;height:30px}.rh-tool-brand span span{color:var(--rh-violet-2)}.rh-tool-header nav{flex:1;gap:20px;display:flex}.rh-tool-header nav a,.rh-tool-account{color:#77777d;padding:7px 0;font-size:10.5px;font-weight:570;text-decoration:none;position:relative}.rh-tool-header nav a:hover,.rh-tool-account:hover,.rh-tool-header nav a.is-active{color:#fff}.rh-tool-header nav a.is-active:after{content:"";background:#d8d2e5;height:1px;position:absolute;bottom:-17px;left:0;right:0}.rh-tool-account{border:1px solid var(--rh-line);border-radius:8px;padding:7px 11px}.rh-arena-hero{border-bottom:1px solid var(--rh-line-soft);grid-template-columns:minmax(0,1fr) minmax(320px,.45fr);align-items:end;gap:60px;width:min(1440px,100% - 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28px);padding:44px 0 24px}.rh-arena-hero h1{font-size:52px}.rh-arena-hero p{font-size:12px}.rh-arena-console,.rh-arena-results,.rh-arena-notice{width:calc(100% - 20px)}.rh-arena-input{padding:16px}.rh-arena-input-foot{flex-direction:column;align-items:stretch}.rh-arena-input-foot select{max-width:none}.rh-model-grid{grid-template-columns:1fr}.rh-model-choice{border-right:0!important}.rh-result-grid{grid-template-columns:1fr!important}.rh-arena-card-media{aspect-ratio:4/5}}