:root {
    --bg-color: #f0f2f5;
    --container-bg: #ffffff;
    --text-color: #333333;
    --btn-primary: #008CBA;
    --btn-hover: #005f7a;
    --ball-bg: #4CAF50;
    --ball-text: #ffffff;
    --shadow: rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-color: #f0f2f5;
    --btn-primary: #00a8e8;
    --btn-hover: #007ea7;
    --ball-bg: #45a049;
    --shadow: rgba(0,0,0,0.5);
}

body {
    font-family: sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 40px 0;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 8px var(--shadow);
    transition: background-color 0.3s, box-shadow 0.3s;
    position: relative;
    width: 100%;
    max-width: 500px;
}

.theme-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 10px;
}

.theme-btn {
    background-color: var(--container-bg);
    color: var(--text-color);
    border: 1px solid var(--text-color);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.theme-btn:hover {
    background-color: var(--text-color);
    color: var(--container-bg);
}

.quote-container {
    margin-top: 20px;
    margin-bottom: 20px;
    font-style: italic;
    font-size: 18px;
    color: var(--text-color);
    min-height: 1.5em;
}

h1 {
    margin-bottom: 30px;
    margin-top: 40px;
}

.numbers-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.number {
    width: 50px;
    height: 50px;
    background-color: var(--ball-bg);
    color: var(--ball-text);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 24px;
    font-weight: bold;
}

#generate-btn {
    background-color: var(--btn-primary);
    color: white;
    padding: 15px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
    width: 100%;
}

#generate-btn:hover {
    background-color: var(--btn-hover);
}

.divider {
    margin: 40px 0;
    border: 0;
    border-top: 1px solid var(--text-color);
    opacity: 0.2;
}

.contact-section {
    margin-top: 20px;
    text-align: left;
}

.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: 10px;
    border: 1px solid var(--text-color);
    border-radius: 5px;
    background-color: var(--container-bg);
    color: var(--text-color);
    font-size: 14px;
    width: 100%;
    box-sizing: border-box;
}

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

.submit-btn {
    background-color: var(--btn-primary);
    color: white;
    padding: 12px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background-color 0.3s;
    width: 100%;
}

.submit-btn:hover {
    background-color: var(--btn-hover);
}