* {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}
body {
    background: #100c1c;
    display: flex;
    flex-direction: column;
    min-height: 100vh; 
}
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 10%;
    background: transparent;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}
.logo {
    font-size: 25px;
    color: white;
    font-weight: 800;
}
.navbar a {
    cursor: pointer;
    font-size: 18px;
    color: white;
    font-weight: 600;
    margin-left: 35px;
    transition: all .5s ease;
}
.navbar a:hover {
    color: #00abf0;
}
.navbar a.active {
    color: #00abf0;
    text-decoration: underline;
    text-underline-offset: 1rem;
}
.main-heading {
    text-align: center; 
    font-size: 24px; 
    color: #494eea; 
    margin-bottom: 20px; 
}
.container {
    width: 400px;
    padding: 25px 35px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    border-radius: 10px;
}
.container p {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 8px;
}
.container input {
    width: 100%;
    height: 50px;
    border: 1px solid #494eea;
    outline: 0;
    padding: 10px;
    margin: 10px 0 20px;
    border-radius: 5px;
}
.container button {
    width: 100%;
    height: 50px;
    background: #494eea;
    color: #fff;
    border: 0;
    outline: 0;
    border-radius: 5px;
    box-shadow: 0 10px 10px rgba(0, 0, 0, 0);
    cursor: pointer;
    margin: 20px 0;
    font-weight: 500;
}
#imgBox {
    width: 200px;
    border-radius: 5px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 1s;
}
#imgBox img {
    width: 100%;
    padding: 10px;
}
#imgBox.show-img {
    max-height: 300px;
    margin: 10px auto;
    border: 1px solid #d1d1d1;
}
.error {
    animation: shake 0.1s linear 10;
}
@keyframes shake {
    0% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-2px);
    }
    50% {
        transform: translateX(0);
    }
    75% {
        transform: translateX(2px);
    }
    100% {
        transform: translateX(0);
    }
}
.footer {
    margin-top: auto; 
    text-align: center; 
    padding: 20px 0; 
    background-color: #100c1c; 
    color: white; 
    position: relative; 
}