:root{--primary-color:#8e44ad;--secondary-color:#6c757d;--success-color:#28a745;--danger-color:#dc3545;--light-color:#f8f9fa;--dark-color:#343a40;--active-nav-bg:#f3e5f5;--active-nav-color:#6c3483}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background-color:#f4f7f9;line-height:1.6}.header,.footer{width:100%;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.05);height:auto}.exam-header-details{text-align:center;padding:1rem 0;border-bottom:3px double var(--primary-color);margin-bottom:1rem;position:relative}.exam-header-details h1{font-size:2rem;margin-bottom:.5rem;color:var(--primary-color)}.exam-meta{display:flex;justify-content:center;gap:2rem;margin-top:1rem;font-size:1.1rem}.header-nav-bar{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid #eee;margin-bottom:15px}.back-link{color:var(--secondary-color);text-decoration:none;font-weight:600;display:inline-flex;align-items:center;gap:5px;transition:color .3s}.back-link:hover{color:var(--primary-color)}.footer{text-align:center;padding:2rem 0;margin-top:3rem;background-color:#fff;border-top:1px solid #eee}.footer p{margin:.5rem 0;color:#666}.footer a{color:var(--primary-color);text-decoration:none;font-weight:600}.container{max-width:1200px;margin:2rem auto;padding:0 15px}.test-paper-container{display:flex;gap:20px;margin-top:20px}.sidebar{flex:0 0 220px;background-color:#fff;padding:20px;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.08)}.sidebar h3{margin-top:0;color:var(--dark-color);border-bottom:2px solid var(--primary-color);padding-bottom:10px;margin-bottom:15px;font-size:1.2em}.section-nav{display:flex;flex-direction:column}.nav-button{background-color:var(--light-color);border:none;padding:12px 15px;margin-bottom:8px;text-align:left;cursor:pointer;border-radius:5px;transition:all .3s ease;font-size:1rem;color:var(--dark-color);box-shadow:0 1px 3px rgba(0,0,0,.05)}.nav-button:hover{background-color:var(--active-nav-bg);color:var(--active-nav-color);transform:translateX(3px)}.nav-button.active{background-color:var(--primary-color);color:white;font-weight:bold;box-shadow:0 2px 8px rgba(0,123,255,.2)}.test-content{flex-grow:1;background-color:#fff;padding:30px;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.08)}.question-section{display:none;animation:fadeIn .5s ease-in-out}.question-section.active{display:block}.question-section h2{color:var(--primary-color);margin-bottom:20px;padding-bottom:10px;border-bottom:2px solid var(--primary-color);font-size:1.8em;text-align:center}.general-instructions{background:#fff3cd;border:1px solid #ffeeba;padding:15px;border-radius:8px;margin-bottom:20px;color:#856404}.question-block{margin-bottom:30px;padding:20px;border:1px solid #e0e0e0;border-radius:8px;background-color:#fdfdfd;box-shadow:0 1px 5px rgba(0,0,0,.05)}.question-block p{margin-bottom:15px;line-height:1.7;color:#333;font-size:1.05em}.question-block strong{color:var(--dark-color)}.question-block label{display:block;margin-bottom:8px;font-size:1rem;color:#444;cursor:pointer}.question-block input[type=radio]{margin-right:10px;transform:scale(1.1);accent-color:var(--primary-color)}.question-block textarea{width:calc(100% - 20px);padding:10px;border:1px solid #ccc;border-radius:5px;min-height:100px;font-size:1rem;line-height:1.5;margin-top:10px;resize:vertical;box-shadow:inset 0 1px 3px rgba(0,0,0,.05)}.submit-test-btn{display:inline-block;width:auto;margin:0;padding:12px 25px;font-size:1.2rem;background-color:var(--success-color);color:white;border:none;border-radius:30px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 10px rgba(40,167,69,.2)}.submit-test-btn:hover{background-color:#218838;transform:translateY(-3px);box-shadow:0 6px 15px rgba(40,167,69,.3)}.test-actions{display:flex;justify-content:center;align-items:center;gap:20px;margin-top:40px;flex-wrap:wrap}.next-section-btn{padding:12px 25px;font-size:1.2rem;border-radius:30px;background-color:var(--primary-color);color:white;border:none;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 10px rgba(142,68,173,.2)}.next-section-btn:hover{background-color:#6c3483;transform:translateY(-3px)}.solutions-section{padding-top:30px;border-top:2px dashed #e0e0e0;margin-top:50px}.solutions-section h2{color:var(--danger-color);border-bottom-color:var(--danger-color)}.solution-block{margin-bottom:25px;padding:15px;border:1px solid #f0f0f0;border-left:5px solid var(--danger-color);border-radius:8px;background-color:#fff9f9;box-shadow:0 1px 5px rgba(0,0,0,.05)}.solution-block h3{color:var(--danger-color);margin-top:0;margin-bottom:10px;font-size:1.3em}.solution-block p{margin-bottom:10px;color:#555;line-height:1.6}.solution-block strong{color:var(--dark-color)}.solution-block .explanation{font-style:italic;color:#666;border-top:1px dashed #f0f0f0;padding-top:10px;margin-top:15px}.btn{padding:12px 28px;font-size:1.1em;border-radius:25px;border:none;cursor:pointer;transition:all .3s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:#0056b3;transform:translateY(-2px);box-shadow:0 4px 15px rgba(0,123,255,.3)}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-secondary:hover{background-color:#5a6268}.btn:disabled{background-color:#e9ecef;cursor:not-allowed;transform:none;box-shadow:none}.sidebar-toggle{display:none;position:fixed;right:0;top:50%;transform:translateY(-50%);background:var(--primary-color);color:white;border:none;padding:12px 15px;border-radius:10px 0 0 10px;cursor:pointer;z-index:1001;box-shadow:-2px 0 8px rgba(0,0,0,.15);font-size:1.2rem}@media (max-width:992px){.test-paper-container{flex-direction:column}.sidebar-toggle{display:block}.sidebar{position:fixed;right:-280px;top:50%;transform:translateY(-50%);width:260px;max-height:80vh;overflow-y:auto;z-index:1000;transition:right .3s cubic-bezier(.4,0,.2,1);border:1px solid #eee;border-right:none}.sidebar.active{right:0;max-height:none;overflow-y:visible}.section-nav{flex-direction:column}.exam-header-details{display:block!important;text-align:center;padding:10px 0}.exam-header-details h1{font-size:1.5rem;margin-bottom:.3rem}.exam-header-details h2{font-size:1rem;margin-bottom:.5rem}.exam-meta{flex-direction:column;gap:.5rem;font-size:.9rem}.header .container{padding:0 15px}}@media (max-width:768px){.container{margin:1rem auto}.test-content{padding:20px}.test-actions{flex-direction:column;width:100%;gap:15px}}@media (max-width:480px){body{font-size:14px}.test-content{padding:15px}.submit-test-btn,.next-section-btn{width:100%;padding:12px;font-size:1.1rem}.question-section h2{font-size:1.5em}.question-block p{font-size:1em}}