:root{--bg:#f3f6fb;--surface:#fff;--surface-soft:#f7f9fc;--text:#172033;--muted:#697386;--border:#d9e1ec;--primary:#1f6feb;--primary-dark:#185abc;--danger-bg:#fff1f1;--danger-text:#b42318;--shadow:0 18px 50px #1720331f;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.7}a{color:inherit}h1,h2,p{margin:0}h1{font-size:clamp(2rem,4vw,3.25rem);line-height:1.05}h2{font-size:1.125rem;line-height:1.3}#app{min-height:100vh}.auth-page,.dashboard-page,.knowledge-page{min-height:100vh;padding:32px}.auth-page{place-items:center;display:grid}.auth-card{border:1px solid 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