:root{--color-bg:#f6f7fb;--color-surface:#fff;--color-border:#e3e6ee;--color-text:#1f2333;--color-text-muted:#6b7280;--color-primary:#4f46e5;--color-primary-hover:#4338ca;--color-primary-soft:#eef2ff;--color-success:#16a34a;--color-success-soft:#f0fdf4;--color-success-border:#bbf7d0;--color-danger:#dc2626;--color-danger-soft:#fef2f2;--color-danger-border:#fecaca;--color-warning:#d97706;--color-warning-soft:#fffbeb;--color-warning-border:#fde68a;--radius:10px;--shadow-sm:0 1px 2px #1018280f;--shadow-md:0 6px 16px #10182814;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:Segoe UI,system-ui,-apple-system,sans-serif}:root[data-theme=dark]{--color-bg:#10121a;--color-surface:#1a1d29;--color-border:#2c303f;--color-text:#e7e9f0;--color-text-muted:#9aa1b4;--color-primary:#818cf8;--color-primary-hover:#a5b0fb;--color-primary-soft:#23263c;--color-success:#4ade80;--color-success-soft:#4ade801f;--color-success-border:#4ade8059;--color-danger:#f87171;--color-danger-soft:#f871711f;--color-danger-border:#f8717159;--color-warning:#fbbf24;--color-warning-soft:#fbbf241f;--color-warning-border:#fbbf2459;--shadow-sm:0 1px 2px #0006;--shadow-md:0 6px 16px #00000080;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%}body{background:var(--color-bg);color:var(--color-text);margin:0}h1,h2,h3{margin:0 0 .4rem}p{margin:0 0 .5rem;line-height:1.5}a{color:var(--color-primary)}input,textarea,select{border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);border-radius:8px;width:100%;padding:.55rem .75rem;font-family:inherit;font-size:.95rem}textarea{resize:vertical}input:focus,textarea:focus,select:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-soft);outline:none}button{background:var(--color-primary);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:8px;padding:.55rem 1.1rem;font-family:inherit;font-size:.95rem;font-weight:600;transition:background .15s}button:hover:not(:disabled){background:var(--color-primary-hover)}button:disabled{background:var(--color-border);color:var(--color-text-muted);cursor:not-allowed}label{color:var(--color-text-muted);font-size:.85rem;font-weight:500}.topnav{background:var(--color-surface);border-bottom:1px solid var(--color-border);flex-wrap:wrap;align-items:center;gap:1.25rem;padding:.85rem 1.5rem;display:flex}.topnav a{color:var(--color-text-muted);font-size:.92rem;font-weight:500;text-decoration:none}.topnav a:hover{color:var(--color-primary)}.topnav-right{align-items:center;gap:.9rem;margin-left:auto;display:flex}.brand{color:var(--color-text);align-items:center;gap:.4rem;margin-right:.5rem;font-size:1.05rem;font-weight:700;display:flex}.page-container{max-width:880px;margin:0 auto;padding:1.75rem 1.5rem 3rem}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:1.25rem;display:block}.card+.card{margin-top:.9rem}.card-link{transition:box-shadow .15s,transform .15s}.card-link:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.form-stack{flex-direction:column;gap:.65rem;max-width:480px;display:flex}.form-row{flex-wrap:wrap;gap:.6rem;display:flex}.error-text{color:var(--color-danger);font-size:.88rem}.muted-text{color:var(--color-text-muted);font-size:.88rem}.correct-text{color:var(--color-success);font-weight:600}.wrong-text{color:var(--color-danger);font-weight:600}.summary-box,.plan-box,.insight-box{background:var(--color-primary-soft);border-radius:8px;margin-top:.6rem;padding:.9rem 1.1rem;line-height:1.6}.summary-box>:first-child,.plan-box>:first-child,.insight-box>:first-child{margin-top:0}.summary-box>:last-child,.plan-box>:last-child,.insight-box>:last-child{margin-bottom:0}.summary-box h1,.summary-box h2,.summary-box h3,.plan-box h1,.plan-box h2,.plan-box h3,.insight-box h1,.insight-box h2,.insight-box h3{margin:.9rem 0 .4rem;font-size:1.05rem}.summary-box ul,.summary-box ol,.plan-box ul,.plan-box ol,.insight-box ul,.insight-box ol{margin:.4rem 0;padding-left:1.3rem}.summary-box li,.plan-box li,.insight-box li{margin-bottom:.25rem}.summary-box p,.plan-box p,.insight-box p{margin:.5rem 0}.material-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;display:flex}.material-actions{gap:.5rem;display:flex}.auth-page{max-width:360px;margin:3rem auto}.dashboard-grid{flex-wrap:wrap;gap:1rem;margin-top:1.5rem;display:flex}.dashboard-tile{color:inherit;flex:200px;text-decoration:none}.quiz-option{cursor:pointer;margin:.4rem 0;display:block}.quiz-option input{width:auto;margin-right:.5rem}.page-intro{color:var(--color-text-muted);max-width:640px;margin-bottom:1.25rem;font-size:.92rem}.success-banner{background:var(--color-success-soft);color:var(--color-success);border:1px solid var(--color-success-border);border-radius:8px;margin-bottom:.75rem;padding:.55rem .85rem;font-size:.88rem}.field-hint{color:var(--color-text-muted);margin-top:-.3rem;font-size:.8rem}.stat-tiles{flex-wrap:wrap;gap:.9rem;margin-bottom:1.25rem;display:flex}.stat-tile{flex:140px}.stat-tile-value{color:var(--color-text);font-size:1.8rem;font-weight:700;line-height:1.2}.stat-tile-label{color:var(--color-text-muted);margin-top:.15rem;font-size:.82rem}.topic-bar-row{margin-bottom:.9rem}.topic-bar-row:last-child{margin-bottom:0}.topic-bar-label{justify-content:space-between;margin-bottom:.3rem;font-size:.9rem;display:flex}.topic-bar-label .topic-name{font-weight:600}.topic-bar-label .topic-pct{color:var(--color-text-muted)}.topic-bar-track{background:var(--color-bg);border:1px solid var(--color-border);border-radius:999px;height:10px;overflow:hidden}.topic-bar-fill{border-radius:999px;height:100%}.weak-topics-banner{background:var(--color-warning-soft);border:1px solid var(--color-warning-border);border-radius:8px;margin-bottom:1rem;padding:.75rem .9rem;font-size:.9rem}.weak-topics-banner strong{color:var(--color-warning)}.badge-weak{background:var(--color-danger-soft);color:var(--color-danger);border:1px solid var(--color-danger-border);border-radius:999px;padding:.1rem .6rem;font-size:.75rem;font-weight:600}.due-review-card{margin-bottom:1.25rem}.due-review-row{border-bottom:1px solid var(--color-border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;padding:.6rem 0;display:flex}.due-review-row:last-child{border-bottom:none;padding-bottom:0}.due-review-meta{font-size:.85rem}.due-review-btn{background:var(--color-primary);color:#fff;border-radius:var(--radius);white-space:nowrap;padding:.4rem .9rem;font-size:.85rem;font-weight:600;text-decoration:none}.due-review-btn:hover{background:var(--color-primary-hover)}.due-review-alert{background:var(--color-primary-soft);border:1px solid var(--color-primary);border-radius:var(--radius);color:var(--color-text);margin-bottom:1rem;padding:.7rem .9rem;font-size:.9rem;font-weight:600;text-decoration:none;display:block}.due-review-alert:hover{opacity:.9}.theme-toggle-btn{color:var(--color-text-muted);border:1px solid var(--color-border);background:0 0;border-radius:8px;padding:.4rem .65rem;font-size:1rem;line-height:1}.theme-toggle-btn:hover:not(:disabled){background:var(--color-bg);color:var(--color-text);border-color:var(--color-text-muted)}