:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--secondary-color: #10b981;--background-start: #f1f5f9;--background-end: #e2e8f0;--surface-color: rgba(255, 255, 255, .85);--surface-color-solid: #ffffff;--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #94a3b8;--text-inverse: #ffffff;--border-color: #e2e8f0;--error-color: #ef4444;--error-bg: #fef2f2;--success-color: #22c55e;--success-bg: #f0fdf4;--warning-color: #eab308;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1.25rem;--radius-xl: 2rem;--shadow-sm: 0 1px 3px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 10px -2px rgb(0 0 0 / .05), 0 2px 4px -2px rgb(0 0 0 / .02);--shadow-lg: 0 15px 25px -5px rgb(0 0 0 / .08), 0 8px 10px -6px rgb(0 0 0 / .04);--shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, .05);--shadow-focus: 0 0 0 4px rgba(79, 70, 229, .15)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;color:var(--text-primary);background:linear-gradient(135deg,var(--background-start) 0%,var(--background-end) 100%);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{display:flex;flex-direction:column;min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text-primary)}h1{font-size:2.25rem}h2{font-size:1.875rem}h3{font-size:1.5rem}p{line-height:1.5;color:var(--text-secondary)}.glass-panel{background:var(--surface-color);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.4);border-radius:var(--radius-lg);box-shadow:var(--shadow-glass)}.container{max-width:1000px;margin:0 auto;padding:2rem;width:100%}.flex-center{display:flex;align-items:center;justify-content:center}.flex-between{display:flex;align-items:center;justify-content:space-between}.grid-cols-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;border-radius:var(--radius-md);border:none;cursor:pointer;transition:all .2s ease;font-family:inherit}.btn-primary{background-color:var(--primary-color);color:var(--text-inverse);box-shadow:0 4px 14px #6366f163}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 20px #6366f173}.btn-secondary{background-color:transparent;color:var(--primary-color);border:1px solid var(--primary-color)}.btn-secondary:hover{background-color:#6366f10d}.btn-danger{background-color:var(--error-color);color:var(--text-inverse)}.btn-danger:hover{background-color:#dc2626}.btn-ghost{background-color:transparent;color:var(--text-secondary)}.btn-ghost:hover{background-color:#0f172a0d;color:var(--text-primary)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important;box-shadow:none!important}.form-group{margin-bottom:1.5rem}.form-label{display:block;font-weight:500;margin-bottom:.5rem;color:var(--text-primary)}.form-input,.form-textarea,.form-select{width:100%;padding:.75rem 1rem;border-radius:var(--radius-md);border:1px solid var(--border-color);background-color:var(--surface-color-solid);font-family:inherit;font-size:1rem;color:var(--text-primary);transition:all .2s}.form-input:focus,.form-textarea:focus,.form-select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f126}.form-textarea{resize:vertical;min-height:100px}.card{background:var(--surface-color-solid);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:1.5rem;transition:transform .2s,box-shadow .2s;border:1px solid var(--border-color)}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.badge{display:inline-flex;align-items:center;padding:.25rem .75rem;border-radius:9999px;font-size:.875rem;font-weight:500}.badge-success{background-color:var(--success-bg);color:var(--success-color);border:1px solid var(--success-color)}.badge-error{background-color:var(--error-bg);color:var(--error-color);border:1px solid var(--error-color)}@keyframes fadeIn{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.animate-fade-in{animation:fadeIn .5s cubic-bezier(.16,1,.3,1) forwards}.animate-slide-in{animation:slideInRight .4s cubic-bezier(.16,1,.3,1) forwards}.quiz-option{display:flex;align-items:center;padding:1.25rem 1.5rem;border-radius:var(--radius-lg);border:2px solid var(--border-color);background:var(--surface-color-solid);cursor:pointer;transition:all .25s cubic-bezier(.16,1,.3,1);font-size:1.125rem;font-weight:500;color:var(--text-primary);margin-bottom:1rem;position:relative;overflow:hidden}.quiz-option:hover{transform:translateY(-2px);border-color:#cbd5e1;box-shadow:var(--shadow-md);background:var(--background-start)}.quiz-option.selected{border-color:var(--primary-color);background:#4f46e50a;box-shadow:var(--shadow-focus)}.quiz-option.selected:hover{transform:translateY(0)}.quiz-option-indicator{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;border:2px solid #cbd5e1;margin-right:1.25rem;flex-shrink:0;transition:all .2s ease;background:var(--surface-color-solid)}.quiz-option.selected .quiz-option-indicator{border-color:var(--primary-color);background:var(--primary-color);color:#fff}.quiz-option.checkbox .quiz-option-indicator{border-radius:6px}.progress-container{width:100%;height:8px;background:var(--border-color);border-radius:8px;overflow:hidden}.progress-bar{height:100%;background:var(--primary-color);border-radius:8px;transition:width .6s cubic-bezier(.16,1,.3,1);position:relative}.progress-bar:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:progressPulse 2s infinite linear}@keyframes progressPulse{0%{transform:translate(-100%)}to{transform:translate(100%)}}.app-header{background:var(--surface-color);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.4);padding:1rem 2rem;position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center}.app-logo{font-size:1.5rem;font-weight:800;color:var(--primary-color);text-decoration:none;display:flex;align-items:center;gap:.5rem}