:root{--bg: #f7f5ff;--bg-alt: #ffffff;--text: #1e1b2e;--text-muted: #5c5773;--primary: #6c4cff;--primary-dark: #5638e0;--danger: #e5484d;--card-border: #e7e3fb;--radius: 14px;--shadow: 0 8px 24px rgba(108, 76, 255, .1)}[data-theme=dark]{--bg: #14121f;--bg-alt: #1d1a2e;--text: #f2f0ff;--text-muted: #b3aecb;--primary: #8f79ff;--primary-dark: #7a63ff;--danger: #ff6b6b;--card-border: #2b2745;--shadow: 0 8px 24px rgba(0, 0, 0, .4)}*{transition:background-color .2s ease,color .2s ease,border-color .2s ease}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text)}.app{max-width:1100px;margin:0 auto;padding:32px 20px 80px}.app-header{text-align:center;margin-bottom:32px}.app-header h1{font-size:2.2rem;margin-bottom:4px;color:var(--primary)}.app-header p{color:var(--text-muted);margin:0}.app-main{display:grid;grid-template-columns:340px 1fr;gap:28px;align-items:start}@media (max-width: 850px){.app-main{grid-template-columns:1fr}}.note-form,.search-bar{background:var(--bg-alt);border:1px solid var(--card-border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.note-form h2{margin-top:0;font-size:1.1rem}.note-form label{display:block;font-size:.85rem;font-weight:600;color:var(--text-muted);margin-bottom:12px}.note-form input,.note-form textarea,.search-bar input{width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--card-border);border-radius:8px;font-size:.95rem;font-family:inherit;resize:vertical}.note-form input:focus,.note-form textarea:focus,.search-bar input:focus{outline:2px solid var(--primary);outline-offset:1px}.form-error{color:var(--danger);font-size:.85rem;margin:0 0 12px}.form-actions{display:flex;gap:10px}.btn-primary{background:var(--primary);color:#fff;border:none;padding:10px 20px;border-radius:999px;font-weight:600;cursor:pointer;transition:background .2s ease}.btn-primary:hover{background:var(--primary-dark)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:none;border:1px solid var(--card-border);padding:10px 18px;border-radius:999px;cursor:pointer}.search-bar{margin-bottom:20px}.loading-state,.empty-state{text-align:center;color:var(--text-muted);padding:40px 0}.error-banner{background:#ffe5e5;color:var(--danger);padding:10px 14px;border-radius:8px;margin-bottom:16px}.notes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}.note-card{background:var(--bg-alt);border:1px solid var(--card-border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column}.note-card-header{display:flex;justify-content:space-between;align-items:flex-start;gap:8px;margin-bottom:10px}.note-card-header h3{margin:0;font-size:1.05rem}.subject-badge{background:#ece6ff;color:var(--primary-dark);font-size:.75rem;font-weight:600;padding:4px 10px;border-radius:999px;white-space:nowrap}.note-content{color:var(--text-muted);font-size:.9rem;white-space:pre-wrap;margin-bottom:12px}.summary-box{background:#f4f1ff;border-radius:10px;padding:12px 14px;margin-bottom:12px}.summary-label{font-weight:700;font-size:.85rem;margin:0 0 6px}.summary-box ul{margin:0 0 8px;padding-left:18px;font-size:.87rem}.quiz-question{font-size:.85rem;font-style:italic;margin:0}.note-card-actions{margin-top:auto;display:flex;gap:8px;flex-wrap:wrap}.note-card-actions button{border:none;padding:8px 14px;border-radius:999px;font-size:.8rem;font-weight:600;cursor:pointer}.btn-summarize{background:#fff1e0;color:#b5650b}.btn-edit{background:#e6f0ff;color:#1a5fd6}.btn-delete{background:#ffe5e5;color:var(--danger)}.note-card-actions button:disabled{opacity:.6;cursor:not-allowed}.btn-quiz{background:#e6fff0;color:#0a8a4a}.quiz-box{background:#eefaf2;border-radius:10px;padding:12px 14px;margin-bottom:12px}.quiz-question-block{margin-bottom:14px}.quiz-q-text{font-size:.87rem;font-weight:600;margin:0 0 8px}.quiz-options{display:flex;flex-direction:column;gap:6px}.quiz-option{text-align:left;padding:8px 12px;border-radius:8px;border:1px solid var(--card-border);background:#fff;font-size:.85rem;cursor:pointer}.quiz-option:hover:not(:disabled){border-color:var(--primary)}.quiz-option.correct{background:#d4f7de;border-color:#0a8a4a}.quiz-option.incorrect{background:#ffdede;border-color:var(--danger)}.quiz-option:disabled{cursor:default}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.auth-card{background:var(--bg-alt);border:1px solid var(--card-border);border-radius:var(--radius);padding:36px 32px;box-shadow:var(--shadow);width:100%;max-width:380px;text-align:center}.auth-card h1{margin:0 0 4px;color:var(--primary);font-size:1.8rem}.auth-subtitle{color:var(--text-muted);margin:0 0 24px;font-size:.95rem}.auth-card form{text-align:left}.auth-card label{display:block;font-size:.85rem;font-weight:600;color:var(--text-muted);margin-bottom:14px}.auth-card input{width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--card-border);border-radius:8px;font-size:.95rem;font-family:inherit}.auth-card .btn-primary{width:100%;padding:12px;margin-top:6px}.auth-toggle{margin-top:20px;font-size:.85rem;color:var(--text-muted)}.auth-toggle button{background:none;border:none;color:var(--primary);font-weight:600;cursor:pointer;padding:0;font-size:.85rem}.app-header-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}.user-bar{display:flex;align-items:center;gap:12px;font-size:.9rem;color:var(--text-muted)}.btn-logout{background:none;border:1px solid var(--card-border);padding:6px 14px;border-radius:999px;cursor:pointer;font-size:.85rem;color:var(--text)}.btn-logout:hover{border-color:var(--danger);color:var(--danger)}.btn-theme-toggle{background:var(--bg);border:1px solid var(--card-border);border-radius:999px;width:36px;height:36px;cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center}.btn-theme-toggle:hover{border-color:var(--primary)}