:root{color:#172033;background:#f6f7fb;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-height:100vh;margin:0}button,input,textarea{font:inherit}button{cursor:pointer}header{z-index:10;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe6;border-bottom:1px solid #e8eaf1;justify-content:space-between;align-items:center;height:72px;padding:0 max(24px,50vw - 540px);display:flex;position:sticky;top:0}nav,.actions,.ai-actions{align-items:center;gap:12px;display:flex}.brand{letter-spacing:-.6px;cursor:pointer;font-size:22px;font-weight:800}.container{max-width:1080px;margin:0 auto;padding:54px 24px 80px}.hero-row{justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px;display:flex}h1{letter-spacing:-2px;margin:8px 0 14px;font-size:clamp(36px,5vw,56px);line-height:1}h2{margin-top:40px}.muted{color:#70788b}.eyebrow{letter-spacing:1.5px;color:#6b5cff;margin:0;font-size:12px;font-weight:800}.primary,.secondary,.ghost,.danger{border:0;border-radius:12px;padding:14px 18px;font-weight:700}.primary{color:#fff;background:#172033}.secondary{color:#fff;background:#6b5cff}.ghost{color:#31394c;background:#eef0f6}.danger{color:#b42318;background:#fff0f0}.compact{padding:12px 16px}.panel{background:#fff;border:1px solid #e5e7ef;border-radius:20px;padding:26px;box-shadow:0 12px 35px #232b440d}.form-panel{gap:14px;margin-bottom:26px;display:grid}input,textarea{background:#fff;border:1px solid #dfe2eb;border-radius:12px;outline:none;width:100%;padding:14px}input:focus,textarea:focus{border-color:#6b5cff;box-shadow:0 0 0 3px #6b5cff1a}textarea{resize:vertical;min-height:240px}.note-grid{grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;display:grid}.note-card{text-align:left;background:#fff;border:1px solid #e5e7ef;border-radius:20px;min-height:210px;padding:24px;transition:all .2s}.note-card:hover{transform:translateY(-3px);box-shadow:0 16px 40px #232b4414}.note-card h3{margin:24px 0 8px;font-size:21px}.note-card p,.note-card small{color:#7b8293}.note-icon{color:#6b5cff;background:#efedff;border-radius:12px;place-items:center;width:40px;height:40px;display:inline-grid}.open-label{margin-top:28px;font-weight:700;display:block}.auth-shell{background:radial-gradient(circle at top,#ebe8ff,#f6f7fb 45%);place-items:center;min-height:100vh;padding:24px;display:grid}.auth-card{background:#fff;border:1px solid #e5e7ef;border-radius:24px;width:min(440px,100%);padding:36px;box-shadow:0 24px 70px #232b441a}.auth-card h1{margin-top:34px;font-size:38px}.auth-card form{gap:10px;margin-top:28px;display:grid}.auth-card label{font-size:13px;font-weight:700}.link-button,.back{color:#6b5cff;background:0 0;border:0;padding:12px 0;font-weight:700}.link-button{width:100%;margin-top:10px}.error{color:#b42318;background:#fff0f0;border-radius:10px;padding:12px 14px}.note-content{white-space:pre-wrap;min-height:180px;line-height:1.7}.ai-actions{margin:22px 0}.generated{margin-top:24px}.summary-text{white-space:pre-wrap;margin-top:18px;line-height:1.7}.history{gap:10px;display:grid}.history-item{text-align:left;background:#fff;border:1px solid #e5e7ef;border-radius:14px;justify-content:space-between;align-items:center;width:100%;padding:16px 18px;display:flex}.history-item small{color:#7b8293}.quiz-question{margin:18px 0}.option{cursor:pointer;border:1px solid #e2e5ed;border-radius:12px;margin:9px 0;padding:13px;display:block}.option.selected{background:#f3f1ff;border-color:#6b5cff}.option input{width:auto;margin-right:10px}.score{color:#fff;background:#172033;border-radius:18px;margin-top:20px;padding:24px;font-size:28px;font-weight:800}.score-small{font-size:20px;font-weight:800}@media (width<=650px){.hero-row,.ai-actions{flex-direction:column;align-items:stretch}h1{letter-spacing:-1.4px}}