:root{--bg-primary: #0a0a0f;--bg-card: #16161f;--bg-card-hover: #1e1e2a;--bg-input: #1a1a25;--text-primary: #e8e8ed;--text-secondary: #8888a0;--text-muted: #555566;--accent: #6c5ce7;--accent-light: #a29bfe;--success: #00b894;--success-bg: rgba(0, 184, 148, .1);--error: #e17055;--error-bg: rgba(225, 112, 85, .1);--warning: #fdcb6e;--border: rgba(255, 255, 255, .06);--radius: 16px;--radius-sm: 10px;--shadow: 0 4px 24px rgba(0, 0, 0, .3)}body{background:var(--bg-primary);color:var(--text-primary);min-height:100dvh;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.app{max-width:900px;margin:0 auto;padding:20px 24px;min-height:100dvh}h1{font-size:2rem;font-weight:700;letter-spacing:-.02em}h2{font-size:1.5rem;font-weight:600;letter-spacing:-.01em}h3{font-size:1.15rem;font-weight:600}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:16px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 28px;border:none;border-radius:var(--radius-sm);font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-light)}.btn-primary:active{transform:scale(.97)}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg-card-hover);color:var(--text-primary)}.nav{display:flex;gap:12px;margin-bottom:24px}.nav-link{padding:10px 20px;border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-secondary);text-decoration:none;font-weight:500;font-size:.9rem;transition:all .2s;border:1px solid var(--border)}.nav-link:hover,.nav-link.active{background:var(--accent);color:#fff;border-color:var(--accent)}.progress-bar{height:6px;background:var(--bg-input);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-light));border-radius:3px;transition:width .5s ease}.question-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:20px;transition:border-color .3s}.question-number{display:inline-block;background:var(--accent);color:#fff;width:32px;height:32px;border-radius:50%;text-align:center;line-height:32px;font-size:.85rem;font-weight:700;margin-bottom:16px}.question-content{font-size:1.1rem;line-height:1.7;margin-bottom:20px}.options{display:flex;flex-direction:column;gap:10px}.option-btn{display:flex;align-items:center;padding:16px 20px;background:var(--bg-input);border:2px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1rem;cursor:pointer;transition:all .2s;text-align:left;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.option-btn:hover{border-color:var(--accent);background:var(--bg-card-hover)}.option-btn:active{transform:scale(.98)}.option-btn.selected{border-color:var(--accent);background:#6c5ce726}.option-btn.correct{border-color:var(--success);background:var(--success-bg)}.option-btn.wrong{border-color:var(--error);background:var(--error-bg)}.blank-input{width:100%;padding:14px 18px;background:var(--bg-input);border:2px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1.1rem;outline:none;transition:border-color .2s}.blank-input:focus{border-color:var(--accent)}.blank-input.correct{border-color:var(--success)}.blank-input.wrong{border-color:var(--error)}.feedback-toast{position:fixed;bottom:40px;left:50%;transform:translate(-50%);padding:16px 28px;border-radius:var(--radius);font-size:1rem;font-weight:500;z-index:100;animation:toastIn .4s ease,toastOut .4s ease 3s forwards;max-width:80%;text-align:center}.feedback-toast.success{background:var(--success);color:#fff}.feedback-toast.error{background:var(--error-bg);color:var(--error);border:1px solid var(--error)}.feedback-toast.info{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--accent)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes toastOut{0%{opacity:1}to{opacity:0;transform:translate(-50%) translateY(-10px)}}.dashboard-parent-brief{background:linear-gradient(135deg,#6c5ce72e,#16161f 55%,#101018);border-color:#6c5ce759;box-shadow:0 18px 40px #00000038}.dashboard-brief-kicker{color:var(--accent-light);font-size:.82rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-bottom:12px}.dashboard-brief-headline{font-size:1.35rem;line-height:1.55;font-weight:700;color:var(--text-primary)}.dashboard-brief-subline{margin-top:10px;color:#e8e8ede0;line-height:1.7}.dashboard-brief-action{margin-top:16px;padding:14px 16px;background:#0a0a0f52;border:1px solid rgba(255,255,255,.08);border-radius:14px;line-height:1.7}.dashboard-secondary-section{opacity:.92}.dashboard-report{white-space:pre-line;font-size:.96rem;line-height:1.8;color:var(--text-secondary)}.mini-stat-card{background:var(--bg-input);border:1px solid var(--border);border-radius:14px;padding:14px 16px}.mini-stat-label{color:var(--text-secondary);font-size:.82rem;margin-bottom:8px}.mini-stat-value{color:var(--text-primary);font-size:1rem;font-weight:700;line-height:1.4}.parent-digest-item{padding:14px 0}.source-badge{display:inline-flex;align-items:center;justify-content:center;min-width:74px;padding:4px 10px;border-radius:999px;font-size:.78rem;font-weight:700;letter-spacing:.02em}.source-badge.mimo{background:#6c5ce729;color:var(--accent-light);border:1px solid rgba(108,92,231,.35)}.source-badge.fallback{background:#fdcb6e1f;color:var(--warning);border:1px solid rgba(253,203,110,.3)}.solution{margin-top:16px;padding:16px;background:var(--bg-input);border-radius:var(--radius-sm);border-left:3px solid var(--accent);font-size:.95rem;line-height:1.6;color:var(--text-secondary)}.loading{display:flex;align-items:center;justify-content:center;min-height:200px;color:var(--text-muted);font-size:1rem}.loading:after{content:"";width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;margin-left:12px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(orientation:landscape)and (max-height:800px){.app{padding:12px 32px}.question-card{padding:20px}h1{font-size:1.6rem}}.handwrite-pad-stack{display:flex;flex-direction:column;gap:16px}.handwrite-pad-shell{display:flex;flex-direction:column;gap:8px}.handwrite-pad-card{background:linear-gradient(180deg,#ffffff05,#fff0);border:1px solid var(--border);border-radius:16px;padding:14px}.handwrite-pad-card.active{border-color:#6c5ce78c;box-shadow:0 0 0 1px #6c5ce740,0 12px 32px #00000038}.handwrite-pad-toolbar{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}.handwrite-pad-canvas{display:block;width:100%}@media(max-width:768px){.handwrite-pad-card{padding:12px}}