/* Root Variables for Light and Dark Modes */
:root {
    --background-color: #f4f4f4;
    --text-color: #333;
    --header-background: #0072c6;
    --header-text-color: #fff;
    --button-background: #0072c6;
    --button-hover-background: #005a9e;
    --card-background: #fff;
    --card-border: #ddd;
}

body.dark-mode {
    --background-color: #121212;
    --text-color: #e0e0e0;
    --header-background: #1e1e1e;
    --header-text-color: #fff;
    --button-background: #1e88e5;
    --button-hover-background: #1565c0;
    --card-background: #1e1e1e;
    --card-border: #333;
}

/* General Styles */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: var(--header-background);
    color: var(--header-text-color);
    padding: 1em 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    margin: 0;
    font-size: 1.8em;
}

nav {
    margin-top: 0.5em;
}

nav a {
    color: var(--header-text-color);
    text-decoration: none;
    margin: 0 1em;
    font-weight: bold;
    transition: color 0.3s;
}

nav a:hover {
    color: #ffcc00;
}

main {
    max-width: 900px;
    margin: 2em auto;
    padding: 2em;
    background: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--card-border);
    transition: background-color 0.3s, border-color 0.3s;
}

h2 {
    color: var(--header-background);
    margin-bottom: 1em;
}

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

ul li {
    margin-bottom: 1em;
    padding: 1em;
    background: var(--card-background);
    border: 1px solid var(--card-border);
    border-radius: 4px;
    transition: background-color 0.3s, border-color 0.3s;
}

button {
    display: inline-block;
    padding: 0.7em 1.5em;
    background-color: var(--button-background);
    color: var(--header-text-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s;
}

button:hover {
    background-color: var(--button-hover-background);
}

/* Admin Dashboard Styling */
header {
    background-color: #0072c6;
    color: white;
    padding: 1em;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    margin: 0;
    font-size: 1.8em;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 1em;
    font-weight: bold;
    transition: color 0.3s;
}

nav a:hover {
    color: #ffcc00;
}

main {
    max-width: 900px;
    margin: 2em auto;
    padding: 2em;
    background: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    border: 1px solid #ddd;
}

h2, h3 {
    color: #0072c6;
}

form {
    margin-top: 1em;
}

form label {
    display: block;
    margin: 0.5em 0 0.2em;
    font-weight: bold;
}

form input, form textarea, form button {
    width: 100%;
    padding: 0.7em;
    margin-bottom: 1em;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1em;
}

form button {
    background-color: #0072c6;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

form button:hover {
    background-color: #005a9e;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    top: 1em;
    right: 1em;
    background: var(--button-background);
    color: var(--header-text-color);
    border: none;
    padding: 0.5em 1em;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.dark-mode-toggle:hover {
    background: var(--button-hover-background);
}

/* Responsive Design */
@media (max-width: 768px) {
    main {
        padding: 1em;
    }

    header h1 {
        font-size: 1.5em;
    }

    nav a {
        margin: 0 0.5em;
        font-size: 0.9em;
    }
}