:root {
    --primary-color: #6a11cb;
    --secondary-color: #2575fc;
    --background-color: #f0f2f5;
    --card-background-color: #ffffff;
    --text-color: #333;
    --light-text-color: #666;
    --white-color: #fff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --font-family: 'Poppins', sans-serif;
}

/* Theme Toggle Button Styles */
.theme-toggle-container {
    position: fixed;
    top: 20px;
    right: 20px;
}

#theme-toggle {
    background-color: var(--card-background-color);
    color: var(--text-color);
    border: 1px solid var(--light-text-color);
    border-radius: 20px; /* Adjust border-radius for text */
    padding: 8px 15px; /* Add padding for text */
    font-size: 16px; /* Adjust font size for text */
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 2px 10px var(--shadow-color);
    width: auto; /* Allow width to adjust to text */
    height: auto; /* Allow height to adjust to text */
}

#theme-toggle:hover {
    background-color: var(--background-color);
    transform: translateY(-2px);
}

/* Dark Mode Variables */
body.dark-mode {
    --primary-color: #3f0071;
    --secondary-color: #1a1a2e;
    --background-color: #1a1a2e;
    --card-background-color: #2e0249;
    --text-color: #e0e0e0;
    --light-text-color: #a0a0a0;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

body {
    font-family: var(--font-family);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: background-color 0.3s ease;
}

.card {
    width: 90%;
    max-width: 400px;
    background-color: var(--card-background-color);
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-color);
    /* overflow: hidden; Removed as it might interfere with flex expansion */
    text-align: center;
    transition: transform 0.3s ease;
    display: flex; /* Added for flex layout */
    flex-direction: column; /* Added for vertical stacking */
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    padding: 30px 20px;
    background-color: var(--card-background-color);
}

.card-header h1 {
    margin: 0;
    font-size: 28px;
    color: var(--text-color);
    font-weight: 700;
}

.card-header p {
    margin: 10px 0 0;
    color: var(--light-text-color);
    font-size: 16px;
}

.card-body {
    padding: 20px;
    flex-grow: 1; /* Allow card-body to grow and take available space */
    display: flex; /* Added for centering lotto numbers */
    justify-content: center; /* Added for centering lotto numbers */
    align-items: center; /* Added for centering lotto numbers */
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    perspective: 1000px;
    min-height: 60px; /* Ensure consistent height */
    align-items: center; /* Center numbers vertically within their container */
}

.number-placeholder,
.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 24px;
    font-weight: 600;
    transition: all 0.5s ease;
}

.number-placeholder {
    background-color: #eee;
}

.number {
    color: var(--white-color);
    box-shadow: 0 4px 15px var(--shadow-color);
    transform-style: preserve-3d;
    animation: flipIn 0.8s forwards;
}

@keyframes flipIn {
    from {
        transform: rotateY(90deg) scale(0.8);
    }
    to {
        transform: rotateY(0deg) scale(1);
    }
}

.card-footer {
    padding: 30px 20px;
}

#generate-btn {
    padding: 15px 30px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white-color);
    box-shadow: 0 5px 15px rgba(37, 117, 252, 0.3);
    transition: all 0.3s ease;
}

#generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(37, 117, 252, 0.5);
}

#generate-btn:active {
    transform: translateY(0);
    box-shadow: 0 5px 15px rgba(37, 117, 252, 0.3);
}