body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    position: relative;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.logo {
    width: 30%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.input-wrapper {
    position: absolute;
    top: calc(50% + 1px);
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 20;
}

input {
    padding: 20px;
    width: 155px;
    height: 20px;
    font-size: 20px;
    border-radius: 30px;
    font-weight: bold;
    color: #FFFFFF;
    border: none;
    outline: none;
    background-color: #FF0000;
    text-align: center;
    box-shadow: none;
    position: relative;
    z-index: 10;
}

input::placeholder {
    color: #FFFFFF;
    font-size: 33px;
    font-weight: bold;
    transform: translateY(3px);
}

.proteur-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 48px;
    font-weight: bold;
    color: #FFFFFF;
    z-index: 100;
    display: none;
}

.hidden {
    display: none;
}

/* 반응형 디자인 */
@media (max-width: 450px) {
    body { background-size: contain; }
    .logo { width: 140%; }
}

@media (max-width: 768px) and (min-width: 451px) {
    body { background-size: contain; }
    .logo { width: 110%; }
}

@media (max-width: 1024px) and (min-width: 769px) {
    body { background-size: contain; }
    .logo { width: 40%; }
}