:root {
    --bg-color: #f0f2f5;
    --container-bg: #fff;
    --text-color: #333;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

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

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    background-color: var(--container-bg);
    color: var(--text-color);
    box-shadow: 0 4px 8px var(--shadow);
    transition: all 0.3s ease;
}

.container {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow);
    text-align: center;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

h1 {
    color: var(--text-color);
    margin-bottom: 30px;
}

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

.number {
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 50%;
    background-color: #4CAF50;
    color: white;
    font-size: 24px;
    font-weight: bold;
    margin: 0 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

#generate-btn {
    background-color: #008CBA;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#generate-btn:hover {
    background-color: #005f7a;
}

.contact-section {
    margin-top: 40px;
    padding-top: 20px;
}

hr {
    border: 0;
    border-top: 1px solid var(--shadow);
    margin-bottom: 25px;
}

h3 {
    color: var(--text-color);
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    background-color: var(--container-bg);
    color: var(--text-color);
    box-sizing: border-box; /* Important for padding */
}

.form-group textarea {
    height: 100px;
    resize: none;
}

.submit-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #45a049;
}