body {
    font-family: sans-serif; 
    margin: 0;
    padding: 20px;
    background-color: #1a1a1a; 
    color: #ffffff; 
    line-height: 1.6; 
}

header {
    text-align: center;
    margin-bottom: 30px; 
    padding: 30px; 
    background: linear-gradient(135deg, #2a2a2a 0%, #1a1a1a 100%); 
    border-radius: 12px; 
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1); 
}

header h1 {
    margin: 10px 0;
    font-size: 32px; 
    font-weight: 600; 
    color: #ffffff; 
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5); 
}

header p {
    margin: 0;
    font-weight: 300;
    color: #cccccc; 
}

#logo {
    width: 200px; 
    height: auto;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5); 
    filter: brightness(1.1); 
}

.menu {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
    justify-content: center; 
}

button {
    padding: 14px 24px; 
    background: linear-gradient(135deg, #333333 0%, #666666 100%); 
    color: #ffffff;
    border: 1px solid #999999; 
    border-radius: 30px; 
    cursor: pointer;
    font-size: 16px; 
    font-weight: 500;
    transition: all 0.4s ease; 
    box-shadow: 0 6px 12px rgba(255, 255, 255, 0.1); 
}

button:hover {
    background: linear-gradient(135deg, #666666 0%, #999999 100%); 
    transform: translateY(-3px); 
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.2); 
}

form {
    margin-bottom: 30px;
    display: none; 
    background-color: #2a2a2a; 
    padding: 30px; 
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1); 
    max-width: 550px; 
    margin-left: auto;
    margin-right: auto; 
    border: 1px solid #333333; 
}

form h3 {
    margin-top: 0;
    font-weight: 600;
    color: #ffffff; 
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
}

form div {
    margin-bottom: 20px; 
}

label {
    display: inline-block;
    width: 140px; 
    font-weight: 400;
    color: #cccccc; 
}

input {
    padding: 12px; 
    width: calc(100% - 150px); 
    border: 1px solid #666666; 
    border-radius: 6px;
    font-size: 14px;
    background-color: #333333; 
    color: #ffffff; 
    transition: border-color 0.3s ease; 
}

input:focus {
    outline: none;
    border-color: #cccccc; 
    box-shadow: 0 0 8px rgba(204, 204, 204, 0.3); 
}

#output {
    margin-top: 30px;
    background-color: #2a2a2a; 
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
    border: 1px solid #333333;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    font-size: 14px;
}

th, td {
    border: 1px solid #444444; 
    padding: 15px; 
    text-align: left;
    color: #ffffff;
}

th {
    background-color: #333333; 
    font-weight: 600;
    color: #ffffff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
}

tr:nth-child(even) {
    background-color: #333333; 
}

@media (max-width: 768px) {
    .menu {
        flex-direction: column; 
        align-items: center;
    }
    form {
        padding: 20px;
    }
    label {
        width: 100%; 
        margin-bottom: 5px;
    }
    input {
        width: 100%;
    }
}


.logo-img {
    width: 600px; 
    height: auto;
    filter: brightness(1.2) contrast(1.1); 
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5); 
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #cccccc;
    font-size: 14px;
    background-color: #1a1a1a; 
    border-top: 1px solid #333333; 
}