:root{--tutor-ink:#191936;--tutor-muted:#77778e;--tutor-subtle:#a1a1b2;--tutor-border:#ececf3;--tutor-paper:#fff;--tutor-canvas:#f8f8fc;--tutor-purple:#6655df;--tutor-purple-dark:#5140c7;--tutor-lavender:#f0edff;--tutor-green:#229a70}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--tutor-canvas);color:var(--tutor-ink);font-family:Arial,Helvetica,sans-serif}button,select,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline-offset:3px;outline:3px solid #aaa0ff}.tutor-app{--sidebar-width:248px;background:radial-gradient(ellipse at 68% -20%, #e7e2ff8f, transparent 40%), var(--tutor-canvas);min-height:100vh;color:var(--tutor-ink);display:flex}.tutor-icon{justify-content:center;align-items:center;line-height:1;display:inline-flex}.tutor-sidebar{z-index:5;width:var(--sidebar-width);border-right:1px solid 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