body { font-family: Arial, sans-serif; margin: 0; padding: 0; text-align: center; }
    .container { max-width: 900px; margin: 20px auto; padding: 20px; background-color: #fff; border-radius: 10px; box-shadow: 0 0 10px rgba(0, 0, 0, 0.1); position: relative; text-align: center; }
    .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 15px; padding: 10px; justify-content: center; }
    .square { border: 1px solid #ddd; border-radius: 10px; padding: 15px; text-align: center; cursor: pointer; transition: 0.3s; white-space: pre-wrap; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); }
    .square:hover { transform: scale(1.05); }
    .bottom-sheet { position: fixed; bottom: -100%; left: 50%; transform: translateX(-50%); width: 60%; background-color: #fff; box-shadow: 0 -2px 15px rgba(0, 0, 0, 0.3); transition: 0.5s; max-height: 80%; overflow-y: auto; border-radius: 15px; }
    .bottom-sheet.show { bottom: 20px; }
    .bottom-sheet-content { padding: 20px; text-align: center; }
    .country-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; justify-content: center; }
    .country-square { padding: 10px; border: 1px solid #ddd; border-radius: 8px; text-align: center; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); margin: 5px; }
    .call-time { position: absolute; top: 10px; right: 20px; font-size: 14px; color: #555; background-color: #e8f4fa; padding: 5px 10px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); }
    .call-btn { background: linear-gradient(135deg, #3498db, #2980b9); color: #fff; border: none; padding: 10px 30px; border-radius: 8px; cursor: pointer; transition: 0.3s; margin-top: 20px; font-size: 20px; font-weight: bold; display: inline-block; }
    .call-btn:hover { background: linear-gradient(135deg, #2980b9, #3498db); }
    .close-btn { background-color: #3498db; color: #fff; border: none; padding: 5px 15px; cursor: pointer; border-radius: 5px; transition: 0.3s; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); }
    .close-btn:hover { background-color: #2980b9; }
    h2 { font-weight: bold; color: #3498db; }
    .tab { cursor: pointer; padding: 5px 10px; margin: 0 5px; display: inline-block; background-color: #e8f4fa; border-radius: 5px; transition: 0.3s; }
    .tab.active { background-color: #3498db; color: #fff; }
    .tab-content { display: none; }
    .tab-content.active { display: block; }
    .info-card { margin: 10px 0; padding: 10px; background-color: #f0f8ff; border-radius: 10px; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); }
    .tab-button { padding: 5px 15px; cursor: pointer; margin: 5px; border-radius: 5px; border: none; background: linear-gradient(135deg, #3498db, #2980b9); color: #fff; transition: 0.3s; }
    .tab-button:hover { transform: scale(1.05); }
    .tab-button.active { background-color: #2980b9; }
    .info-card { margin: 10px 0; padding: 15px; background-color: #f0f8ff; border-left: 5px solid #3498db; border-radius: 10px; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); font-size: 16px; line-height: 1.6; text-align: left; }
    .info-card strong { color: #2c3e50; font-weight: bold; }
    .hidden { display: none; }
    #loadingContainer { margin-top: 20px; }
    .loader { border: 4px solid #f3f3f3; border-top: 4px solid #3498db; border-radius: 50%; width: 40px; height: 40px; animation: spin 1s linear infinite; margin: 0 auto; }
    @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }