/* General Styles */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    color: #fff;
    font-size: 16px;
}

body {
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    background-image: url('ervo_lehre.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: -1;
}

/* Header Styling */
header {
    background-color: rgba(0, 0, 0, 0.5);
    color: #fff;
    text-align: center;
    padding: 1rem;
    border-bottom: 2px solid #fff;
}

nav ul {
    padding: 0;
    list-style-type: none;
}

nav ul li {
    display: inline-block;
    margin-right: 15px;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease-in-out;
}

nav a:hover {
    color: #ccc;
}

/* Main Content Styling */
main {
    flex: 1;
    padding: 20px;
    margin-top: 20px;
}

section {
    margin-bottom: 40px;
}

h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

h2 {
    color: #fff;
    border-bottom: 2px solid #fff;
    padding-bottom: 10px;
    font-size: 1.5rem;
}

/* Form Styling */
form {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    border: 1px solid #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(255, 255, 255, 0.1);
}

label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
    color: #fff;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
input[type="number"] {
    width: 100%;
    padding: 12px;
    margin-top: 8px;
    border: 1px solid #fff;
    border-radius: 4px;
    box-sizing: border-box;
    background-color: rgba(51, 51, 51, 0.5);
    color: #fff;
    transition: border-color 0.3s ease-in-out;
}

input:focus {
    border-color: #fff;
    outline: none;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.2);
}

/* Button Styling */
button {
    background-color: #fff;
    color: #000;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 20px;
    width: 100%;
    font-size: 1rem;
    transition: background-color 0.3s ease-in-out;
}

button:hover {
    background-color: #ccc;
    color: #000;
}

/* Footer Styling */
footer {
    background-color: rgba(0, 0, 0, 0.5);
    color: #fff;
    text-align: center;
    padding: 1rem;
    border-top: 2px solid #fff;
}

/* Smooth Transition Effects */
* {
    transition: all 0.3s ease-in-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    header {
        padding: 0.5rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.2rem;
    }

    nav ul {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        display: block;
        margin-bottom: 10px;
        margin-right: 0;
    }

    main {
        padding: 10px;
    }

    form {
        width: 100%;
        padding: 15px;
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="date"],
    input[type="number"] {
        padding: 10px;
    }

    button {
        padding: 10px 15px;
    }

    footer {
        padding: 0.5rem;
    }
}

/* Additional adjustments for very small screens */
@media (max-width: 480px) {
    body {
        font-size: 12px;
    }

    h1 {
        font-size: 1.2rem;
    }

    h2 {
        font-size: 1rem;
    }

    main {
        padding: 5px;
    }

    form {
        padding: 10px;
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="date"],
    input[type="number"] {
        padding: 8px;
    }

    button {
        padding: 8px 12px;
    }
}