/* Reset some default styles */
body, h1, h2, p, ul, li, form, input, label, textarea, button {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

/* Basic styles */
body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

header h1 {
    margin-bottom: 10px;
}

main {
    width: 90%;
    max-width: 800px;
}

section {
    margin-bottom: 20px;
}

footer {
    text-align: center;
    margin-top: 20px;
}

button {
    cursor: pointer;
    padding: 10px 20px;
    margin-top: 10px;
}

/* Form styles */
form {
    display: flex;
    flex-direction: column;
}

label {
    margin-top: 10px;
}

input, textarea {
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

/* Day/Night mode styles */
:root {
    --bg-color: #fff;
    --text-color: #000;
}

body.night {
    --bg-color: #2c3e50;
    --text-color: #ecf0f1;
}

/* Responsive styles */
@media (min-width: 600px) {
    main {
        width: 80%;
    }
}

@media (min-width: 900px) {
    main {
        width: 70%;
    }
}