:root {
    --bg-color: #f0f0f0;
    --container-bg: #fff;
    --text-color: #333;
    --btn-bg: #007bff;
    --btn-text: #fff;
    --shadow: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-color: #f0f0f0;
    --btn-bg: #0056b3;
    --btn-text: #fff;
    --shadow: rgba(0, 0, 0, 0.5);
}

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

.container {
    position: relative;
    text-align: center;
    padding: 3rem 2rem 2rem;
    background-color: var(--container-bg);
    border-radius: 10px;
    box-shadow: 0 0 10px var(--shadow);
    transition: background-color 0.3s, box-shadow 0.3s;
    width: 100%;
    max-width: 400px;
    margin: 20px;
}

#theme-toggle {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 5px 10px;
    font-size: 0.8rem;
    cursor: pointer;
    border: 1px solid var(--text-color);
    background: transparent;
    color: var(--text-color);
    border-radius: 5px;
}

#generate-btn {
    padding: 0.7rem 1.5rem;
    font-size: 1.1rem;
    cursor: pointer;
    border: none;
    background-color: var(--btn-bg);
    color: var(--btn-text);
    border-radius: 5px;
    transition: background-color 0.2s;
}

#generate-btn:hover {
    filter: brightness(1.1);
}

#result {
    margin-top: 1.5rem;
    font-size: 1.8rem;
    font-weight: bold;
    letter-spacing: 2px;
}

.contact-section {
    margin-top: 2rem;
    text-align: left;
}

.contact-section h3 {
    margin-bottom: 1rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

input[type="email"],
textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--text-color);
    background-color: var(--container-bg);
    color: var(--text-color);
    border-radius: 5px;
    box-sizing: border-box;
    font-family: inherit;
    font-size: 0.9rem;
}

textarea {
    height: 100px;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 0.7rem;
    background-color: var(--btn-bg);
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: opacity 0.2s;
    font-size: 1rem;
}

.submit-btn:hover {
    opacity: 0.8;
}