:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--ms-blue: #0078D4;--ms-blue-hover: #106ebe;--bg-grey: #F3F2F1;--text-dark: #242424;--text-muted: #605E5C;--success-bg: #DFF6DD;--success-border: #0B6A0B;--success-text: #0B6A0B;--error-bg: #FDE7E9;--error-border: #D13438;--error-text: #A80000;--card-shadow: 0 2px 8px rgba(0, 0, 0, .08);--card-shadow-hover: 0 4px 16px rgba(0, 0, 0, .12)}*{box-sizing:border-box}body{background-color:var(--bg-grey);color:var(--text-dark);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;margin:0;min-height:100vh}.container{max-width:1200px;width:100%;margin:0 auto;padding:20px 20px 120px;min-height:100vh;display:flex;flex-direction:column;align-items:center}header{background:linear-gradient(135deg,var(--ms-blue) 0%,#005a9e 100%);color:#fff;padding:1.5rem 2rem;border-radius:12px;display:flex;justify-content:space-between;align-items:center;margin:0 auto 2rem;box-shadow:var(--card-shadow);width:100%;max-width:900px}header h1{margin:0;font-size:1.5rem;font-weight:600}.badge{background:#fff3;padding:.5rem 1rem;border-radius:20px;font-size:.875rem;font-weight:500}.btn-restart-header{background:#fff3;color:#fff;border:1px solid rgba(255,255,255,.3);padding:.5rem 1rem;border-radius:20px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease}.btn-restart-header:hover{background:#ffffff4d;border-color:#ffffff80}.loader-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;gap:1rem}.loader-spinner{width:50px;height:50px;border:4px solid rgba(0,120,212,.1);border-top-color:var(--ms-blue);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.progress-section{margin:0 auto 2rem;width:100%;max-width:900px}.progress-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.progress-text{font-weight:600;color:var(--text-dark);font-size:1.125rem}.progress-answered{color:var(--text-muted);font-size:.875rem}.progress-bar{height:8px;background:#e1dfdd;border-radius:10px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--ms-blue) 0%,#00bcf2 100%);border-radius:10px;transition:width .4s cubic-bezier(.4,0,.2,1)}.question-container{flex:1;display:flex;align-items:flex-start;justify-content:center;margin-bottom:2rem;width:100%}.question-card{background:#fff;border-radius:12px;box-shadow:var(--card-shadow);width:100%;max-width:900px;margin:0 auto;transition:box-shadow .3s ease}.question-card:hover{box-shadow:var(--card-shadow-hover)}.question-content{padding:2.5rem}.question-title{margin:0 0 1.5rem;color:var(--ms-blue);font-size:1.25rem;font-weight:600}.question-scenario{font-size:1.125rem;line-height:1.6;color:var(--text-dark);margin-bottom:2rem}.options-container{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.option-btn{display:flex;align-items:center;justify-content:space-between;width:100%;padding:1rem 1.25rem;border:2px solid #E1DFDD;border-radius:8px;background:#fff;color:var(--text-dark);cursor:pointer;text-align:left;font-size:1rem;line-height:1.5;transition:all .2s ease;position:relative}.option-btn:hover:not(:disabled){background:#f8f8f8;border-color:var(--ms-blue);transform:translateY(-1px)}.option-btn:disabled{cursor:default}.option-btn.selected{border-color:var(--ms-blue);background:#f0f6ff}.option-btn.correct{background:var(--success-bg)!important;border-color:var(--success-border)!important;color:var(--success-text)!important}.option-btn.wrong{background:var(--error-bg)!important;border-color:var(--error-border)!important;color:var(--error-text)!important}.option-text{flex:1;padding-right:1rem}.option-icon{font-size:1.25rem;font-weight:700;min-width:24px;text-align:center}.explanation{margin-top:1.5rem;padding:1.5rem;background:linear-gradient(135deg,#f0f6ff,#e8f4ff);border-left:4px solid var(--ms-blue);border-radius:8px;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.explanation-header{color:var(--ms-blue);margin-bottom:.75rem;font-size:1rem}.explanation p{margin:0 0 .75rem;line-height:1.6;color:var(--text-dark)}.source-link{color:var(--text-muted);font-size:.875rem;display:block;margin-top:.5rem}.navigation-footer{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:900px;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 2rem;background:#fff;border-top:2px solid #E1DFDD;box-shadow:0 -4px 20px #00000014;z-index:100;border-radius:12px 12px 0 0}.btn-primary,.btn-secondary{padding:.75rem 2rem;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap}.btn-primary{background:var(--ms-blue);color:#fff}.btn-primary:hover:not(:disabled){background:var(--ms-blue-hover);transform:translateY(-1px);box-shadow:0 4px 8px #0078d44d}.btn-secondary{background:#fff;color:var(--text-dark);border:2px solid #E1DFDD}.btn-secondary:hover:not(:disabled){background:#f8f8f8;border-color:var(--ms-blue);transform:translateY(-1px)}.btn-primary:disabled,.btn-secondary:disabled{opacity:.4;cursor:not-allowed;transform:none}.nav-dots{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center;align-items:center;max-width:400px}.nav-dot{width:10px;height:10px;border-radius:50%;background:#e1dfdd;border:none;cursor:pointer;transition:all .2s ease;padding:0}.nav-dot:hover{transform:scale(1.3);background:var(--ms-blue)}.nav-dot.active{width:12px;height:12px;background:var(--ms-blue);box-shadow:0 0 0 3px #0078d433}.nav-dot.answered{background:var(--success-border)}.nav-dot.answered.active{background:var(--ms-blue)}.review-container{animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.score-card{background:#fff;border-radius:12px;box-shadow:var(--card-shadow);padding:3rem 2rem;text-align:center;margin-bottom:2rem}.score-circle{width:150px;height:150px;border-radius:50%;background:linear-gradient(135deg,var(--ms-blue) 0%,#00bcf2 100%);display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 2rem;box-shadow:0 8px 24px #0078d44d}.score-percentage{font-size:3rem;font-weight:700;color:#fff}.score-label{font-size:.875rem;color:#ffffffe6;text-transform:uppercase;letter-spacing:1px}.score-card h2{margin:0 0 1rem;color:var(--text-dark);font-size:2rem}.score-details{color:var(--text-muted);font-size:1.125rem;margin-bottom:2rem}.score-actions{margin-top:2rem}.btn-large{padding:1rem 2.5rem;font-size:1.125rem}.review-list{margin-top:2rem}.review-list h3{margin-bottom:1.5rem;color:var(--text-dark);font-size:1.5rem}.review-item{background:#fff;border-radius:12px;box-shadow:var(--card-shadow);padding:2rem;margin-bottom:1.5rem;border-left:4px solid #E1DFDD}.review-item.review-correct{border-left-color:var(--success-border)}.review-item.review-wrong{border-left-color:var(--error-border)}.review-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.review-number{font-weight:600;color:var(--text-dark)}.review-status{padding:.375rem .875rem;border-radius:20px;font-size:.875rem;font-weight:600}.status-correct{background:var(--success-bg);color:var(--success-text)}.status-wrong{background:var(--error-bg);color:var(--error-text)}.review-question{font-size:1.125rem;line-height:1.6;margin-bottom:1rem;color:var(--text-dark)}.review-answer{padding:.75rem 1rem;border-radius:6px;margin-bottom:.75rem;line-height:1.5}.wrong-answer{background:var(--error-bg);color:var(--error-text);border-left:3px solid var(--error-border)}.correct-answer{background:var(--success-bg);color:var(--success-text);border-left:3px solid var(--success-border)}.review-explanation{background:#f8f8f8;padding:1rem;border-radius:6px;margin-top:1rem;line-height:1.6;color:var(--text-dark)}@media(max-width:768px){.container{padding:15px 15px 100px}header{flex-direction:column;gap:1rem;text-align:center;padding:1rem}header h1{font-size:1.25rem}.question-content{padding:1.5rem}.question-scenario{font-size:1rem}.navigation-footer{flex-wrap:wrap;gap:.75rem;padding:1rem 1.5rem;max-width:100%}.btn-primary,.btn-secondary{padding:.625rem 1.25rem;font-size:.875rem}.nav-dots{order:-1;width:100%;max-width:100%}.score-circle{width:120px;height:120px}.score-percentage{font-size:2.5rem}.score-card{padding:2rem 1.5rem}.review-item{padding:1.5rem}}