* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
header {
    cursor: pointer;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #e1f5fe, #ffffff);
    color: #333;
}
header {
    cursor: pointer;
    background-color: #0288d1;
    color: white;
    padding: 20px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    display:fixed
}
.header_box {
    display: flex;
    align-items: center;
    gap: 20px;
    text-align: center;
}
.child_1 {
    width: 100px;
    height: 90px;
    object-fit: cover;
}
.child_2 {
    font-size: 1.3rem;
    font-weight: bold;
    color: white;
}
.centered {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 140px);
    padding: 40px 20px;
}
.content {
    max-width: 700px;
    background-color: #fff;
    padding: 50px 60px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    text-align: center;
}
.content h2 {
    font-size: 30px;
    color: #0277bd;
    margin-bottom: 25px;
    border-bottom: 2px solid #81d4fa;
    display: inline-block;
    padding-bottom: 5px;
}
.space {
    font-size: 18px;
    color: #444;
    line-height: 1.8;
    margin: 12px 0;
}
@media (max-width: 768px) {
    .child_1 {
        width: 80px;
        height: 70px;
    }
    .child_2 {
        font-size: 1.1rem;
        text-align: center;
    }
    .content {
        padding: 30px 20px;
    }
    .content h2 {
        font-size: 26px;
    }
    .space {
        font-size: 16px;
    }
    .header_box {
        flex-direction: column;
        gap: 10px;
    }
    header {
        padding: 15px 10px;
    }
}