.date-calculator{max-width:800px;margin:20px auto;padding:25px;background-color:#fff;border-radius:12px;box-shadow:0 2px 15px rgb(0 0 0 / .1)}.date-calculator h2{text-align:center;color:#2c3e50;margin-bottom:30px;font-size:24px}.calculator-section{background-color:#f8f9fa;padding:25px;border-radius:8px;margin-bottom:25px}.calc-select{width:100%;padding:12px;margin-bottom:20px;border:2px solid #e0e0e0;border-radius:6px;font-size:16px;color:#2c3e50;background-color:#fff}.input-group{margin-bottom:20px}.input-group label{display:block;margin-bottom:8px;color:#34495e;font-weight:600}.input-group input,.input-group select{width:100%;padding:12px;border:2px solid #e0e0e0;border-radius:6px;font-size:16px;transition:all 0.3s ease}.input-group input:focus,.input-group select:focus{border-color:#3498db;outline:none;box-shadow:0 0 5px rgb(52 152 219 / .3)}.calc-button{width:100%;padding:14px;background-color:#3498db;color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:700;cursor:pointer;transition:background-color 0.3s;margin-top:20px}.calc-button:hover{background-color:#2980b9}.results-section{margin-top:30px}.result-box{background-color:#f8f9fa;padding:20px;border-radius:8px;margin-bottom:25px}.result-box h3{color:#2c3e50;margin-bottom:15px;font-size:20px}#date-result{font-size:24px;color:#2c3e50;font-weight:700;text-align:center;margin-bottom:15px}#detailed-result{color:#34495e;line-height:1.6}.holidays-section{background-color:#fff;padding:15px;border-radius:6px;margin-top:20px}.holidays-section h4{color:#2c3e50;margin-bottom:15px;font-size:16px}.holiday-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}.holiday-item{display:flex;align-items:center;gap:8px}.holiday-item input[type="checkbox"]{width:18px;height:18px}.holiday-item label{color:#34495e;font-size:14px}.calc-section{margin-top:20px}@media (max-width:768px){.date-calculator{margin:10px;padding:15px}.holiday-list{grid-template-columns:1fr}}