.notice-board {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 600px;
    padding: 15px 20px;
    background-color: #008000;
    color: #ffffff;
    border-radius: 5px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    animation: slideDown 0.5s ease;
    z-index: 9999;
}

@keyframes slideDown {
    from {
        top: -100px;
        opacity: 0;
    }
    to {
        top: 20px;
        opacity: 1;
    }
}

.notice-board-icon {
    font-size: 24px;
    margin-right: 10px;
}

.notice-board-text {
    flex: 1;
    font-size: 16px;
    line-height: 1.5;
}

.close-btn {
    background: none;
    border: none;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    transition: color 0.3s;
}

.close-btn:hover {
    color: #fdd;
}

@media (max-width: 400px) {
    .notice-board {
        padding: 10px 15px;
    }
    .notice-board-text {
        font-size: 14px;
    }
    .notice-board-icon {
        font-size: 20px;
    }
}