*{box-sizing:border-box}body{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-family:Arial,sans-serif;margin:0;padding:0;min-height:100vh}main{padding:2rem 1rem;max-width:100%;margin:0 auto}.quiz-container{background:#fffffff2;border-radius:20px;padding:2rem;box-shadow:0 10px 40px #0003;color:#333}.quiz-nav-links{display:flex;gap:1rem;justify-content:center;margin-bottom:1.5rem;flex-wrap:wrap}.nav-link-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.8rem 1.5rem;border:2px solid #dee2e6;border-radius:50px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-decoration:none;background:#fff;color:#495057;box-shadow:0 2px 8px #0000001a}.nav-link-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.nav-link-btn.back-btn:hover{background:#667eea;color:#fff;border-color:#667eea}.nav-link-btn.home-btn:hover{background:#f5576c;color:#fff;border-color:#f5576c}.nav-icon{font-size:1.2rem}h1{color:#667eea;text-align:center;margin-bottom:.5rem;font-size:2.5rem;text-shadow:2px 2px 4px rgba(0,0,0,.1)}.instructions{text-align:center;color:#666;margin-bottom:1rem;font-size:1.2rem;font-weight:500}.back-link{text-align:center;margin-bottom:2rem}.back-link a{color:#667eea;text-decoration:none;font-weight:600;transition:color .3s ease;font-size:1.1rem}.back-link a:hover{color:#764ba2}.matching-area{display:grid;grid-template-columns:repeat(auto-fit,minmax(510px,1fr));gap:2rem;margin:2rem 0}.column{display:flex;flex-direction:column;gap:1rem}.draggable-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:1rem;width:310%!important}.column-title{text-align:center;font-size:1.3rem;font-weight:700;color:#667eea;margin-bottom:.5rem;padding:.5rem;background:#f0f4ff;border-radius:10px}.line-item{background:#fff;border:3px solid #dee2e6;border-radius:12px;padding:.8rem 1rem;font-size:1rem;font-weight:500;line-height:1.4;cursor:move;transition:all .3s ease;position:relative;min-height:50px;display:flex;align-items:center;user-select:none}.line-item.left-item{background:#f8f9fa;cursor:default}.line-item.draggable{cursor:grab;word-wrap:break-word}.line-item.draggable:hover{transform:translateY(-2px);box-shadow:0 5px 15px #667eea4d;border-color:#667eea}.line-item.dragging{opacity:.5;cursor:grabbing}.drop-zone{background:#fff;border:3px dashed #dee2e6;border-radius:12px;padding:.8rem 1rem;font-size:1rem;min-height:50px;display:flex;align-items:center;transition:all .3s ease}.drop-zone.drag-over{background:#e7f3ff;border-color:#667eea;border-style:solid}.drop-zone.filled{border-style:solid;border-color:#667eea}.drop-zone .placeholder{color:#adb5bd;font-style:italic}.match-row{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-bottom:1rem}.check-button,.reset-button{display:block;width:100%;max-width:300px;margin:2rem auto;padding:1.2rem 2rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:50px;font-size:1.3rem;font-weight:700;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.check-button:hover,.reset-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea99}.check-button:active,.reset-button:active{transform:translateY(0)}.reset-button{background:linear-gradient(135deg,#28a745,#20c997)}.hidden{display:none!important}.result-message{background:#f8f9fa;border-radius:15px;padding:2rem;margin-top:2rem;text-align:center;font-size:1.4rem;font-weight:600}.result-message.success{background:#d4edda;color:#155724;border:2px solid #28a745}.result-message.partial{background:#fff3cd;color:#856404;border:2px solid #ffc107}.feedback-icon{display:inline-block;width:30px;height:30px;border-radius:50%;margin-left:10px;font-size:1.2rem;line-height:30px;text-align:center;font-weight:700}.feedback-icon.correct{background:#28a745;color:#fff}.feedback-icon.incorrect{background:#dc3545;color:#fff}@media(max-width:768px){main{padding:1rem .5rem}.quiz-container{padding:1.5rem 1rem}h1{font-size:2rem}.match-row{grid-template-columns:1fr}.line-item,.drop-zone{font-size:.95rem;padding:.7rem .8rem}.draggable-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.matching-area{grid-template-columns:1fr}}