:root{color-scheme:light;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f7f7fb;color:#1f2937}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:linear-gradient(180deg,#eef2ff,#fff)}button,input,textarea{font:inherit}button{cursor:pointer}.auth-page,.subject-page{display:flex;flex-direction:column;align-items:center;padding:40px 16px}.auth-card,.note-form-card{width:min(520px,100%);background:#fff;border:1px solid #e5e7eb;border-radius:24px;box-shadow:0 18px 50px #0f172a14;padding:32px;margin-bottom:24px}.auth-card h1,.subject-header h1{margin:0 0 8px;font-size:clamp(2rem,2.5vw,2.6rem)}.auth-card p,.subject-header p{margin:0;color:#6b7280}.auth-form,.note-form{display:grid;gap:16px;margin-top:24px}.auth-form label,.note-form input,.note-form textarea{display:block;width:100%}.auth-form input,.note-form input,.note-form textarea{border:1px solid #d1d5db;border-radius:14px;padding:14px 16px;background:#f8fafc;color:#111827}.auth-form input:focus,.note-form input:focus,.note-form textarea:focus{outline:2px solid #6366f1;outline-offset:2px}.note-form textarea{min-height:140px;resize:vertical}.primary-button,.secondary-button{border:none;border-radius:14px;padding:14px 18px;font-weight:600}.primary-button{background:#4338ca;color:#fff}.secondary-button{background:#eef2ff;color:#4338ca}.text-button{border:none;background:transparent;color:#4338ca;font-weight:600;padding:0}.form-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:12px;padding:12px 16px}.subject-header{width:min(980px,100%);display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px}.notes-grid{width:min(980px,100%);display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.empty-state{width:100%;padding:32px;border:2px dashed #c7d2fe;border-radius:20px;text-align:center;color:#4b5563}.note-card{background:#fff;border:1px solid #e5e7eb;border-radius:22px;padding:20px;box-shadow:0 10px 30px #0f172a0f}.note-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:16px}.note-subject{font-size:.9rem;font-weight:700;color:#4338ca}.note-card h3{margin:0 0 10px}.note-card p{margin:0;color:#374151;line-height:1.7}.delete-button{border:none;background:#fee2e2;color:#991b1b;border-radius:999px;padding:8px 12px}@media (max-width: 640px){.auth-card,.note-form-card,.subject-header,.notes-grid{width:100%}.subject-header{flex-direction:column;align-items:stretch}}