:root {
    --bg-color: #f8f9fa;
    --text-color: #333;
    --button-bg: #4CAF50;
    --button-text: white;
    --card-bg: #ffffff;
    --shadow-color: rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --button-bg: #388E3C;
    --button-text: #ffffff;
    --card-bg: #1e1e1e;
    --shadow-color: rgba(0,0,0,0.5);
}

body {
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

h1 {
    color: var(--text-color);
    margin-bottom: 40px;
}

button {
    background-color: var(--button-bg);
    color: var(--button-text);
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border: none;
    border-radius: 8px;
    box-shadow: 0 4px 8px 0 var(--shadow-color);
    transition: 0.3s;
}

button:hover {
    box-shadow: 0 8px 16px 0 var(--shadow-color);
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
}

.contact-section {
    margin-top: 60px;
    width: 100%;
    max-width: 500px;
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow-color);
    margin-bottom: 40px;
}

.contact-section h2 {
    text-align: center;
    margin-bottom: 20px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-size: 14px;
    font-weight: bold;
}

.form-group input, 
.form-group textarea {
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
    transition: border-color 0.3s;
}

[data-theme="dark"] .form-group input, 
[data-theme="dark"] .form-group textarea {
    border-color: #444;
}

.form-group input:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--button-bg);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}