:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --container-bg: #ffffff;
    --lotto-number-shadow: rgba(0, 0, 0, 0.1);
    --generate-btn-bg: #007bff; /* Distinct color for Generate Numbers button */
    --generate-btn-text: #fff;
    --generate-btn-hover-bg: #0056b3;
    --theme-btn-bg: #6c757d; /* Theme toggle button color */
    --theme-btn-text: #fff;
    --theme-btn-hover-bg: #5a6268;
    --button-shadow: rgba(0, 0, 0, 0.2);
}

body.dark-mode {
    --bg-color: #2c2c2c;
    --text-color: #f0f0f0;
    --container-bg: #3c3c3c;
    --lotto-number-shadow: rgba(0, 0, 0, 0.4);
    --generate-btn-bg: #6a0dad; /* Dark mode distinct color */
    --generate-btn-text: #f0f0f0;
    --generate-btn-hover-bg: #530a8a;
    --theme-btn-bg: #8c9297; /* Dark mode theme toggle button color */
    --theme-btn-text: #f0f0f0;
    --theme-btn-hover-bg: #74797e;
    --button-shadow: rgba(0, 0, 0, 0.4);
}

html {
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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 0.4s ease, color 0.4s ease;
    padding: 20px;
    position: relative; /* For absolute positioning of theme switch */
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px var(--button-shadow);
    transition: background-color 0.4s ease, box-shadow 0.4s ease;
    max-width: 600px; /* Increased max-width for better alignment */
    width: 100%;
}

h1 {
    font-size: 2.2em;
    margin-bottom: 30px;
    color: var(--text-color);
}

.lotto-numbers {
    display: flex;
    flex-wrap: nowrap; /* Ensure single row */
    justify-content: center;
    gap: 10px; /* Adjusted gap for smaller circles */
    margin: 30px 0;
    overflow-x: auto; /* Enable horizontal scrolling if numbers exceed width */
    padding-bottom: 5px; /* Space for scrollbar */
}

.lotto-number {
    flex-shrink: 0; /* Prevent shrinking */
    width: 45px; /* Smaller circles */
    height: 45px;
    border-radius: 50%;
    /* Background and border will be set by specific color classes or default */
    border: 2px solid; /* Border color will be decided by specific class */
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1em; /* Adjusted font size */
    font-weight: bold;
    color: var(--text-color); /* Default text color, overridden by specific classes */
    box-shadow: 0 4px 8px var(--lotto-number-shadow);
    transition: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
}

/* Specific colors for lotto balls based on number ranges */
.lotto-number[data-range="1"] { background-color: #fbc400; border-color: #fbc400; color: #333; } /* 1-10: Yellow */
.lotto-number[data-range="2"] { background-color: #69c8f2; border-color: #69c8f2; color: #333; } /* 11-20: Blue */
.lotto-number[data-range="3"] { background-color: #ff7272; border-color: #ff7272; color: #333; } /* 21-30: Red */
.lotto-number[data-range="4"] { background-color: #aaaaaa; border-color: #aaaaaa; color: #333; } /* 31-40: Grey */
.lotto-number[data-range="5"] { background-color: #b0d840; border-color: #b0d840; color: #333; } /* 41-45: Green */

.buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

#generate-btn {
    padding: 12px 25px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 8px;
    background-color: var(--generate-btn-bg);
    color: var(--generate-btn-text);
    box-shadow: 0 4px 10px var(--button-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
    outline: none;
}

#generate-btn:hover {
    background-color: var(--generate-btn-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--button-shadow);
}

#generate-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px var(--button-shadow);
}

.theme-switch {
    position: absolute;
    top: 20px;
    right: 20px;
    margin-bottom: 0; /* Reset margin */
}

#theme-toggle {
    padding: 8px 15px; /* Smaller padding */
    font-size: 0.9em; /* Smaller font */
    font-weight: 300; /* Thinner font */
    border-radius: 5px;
    background-color: var(--theme-btn-bg);
    color: var(--theme-btn-text);
    box-shadow: 0 2px 5px var(--button-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
    outline: none;
}

#theme-toggle:hover {
    background-color: var(--theme-btn-hover-bg);
    transform: translateY(-1px);
    box-shadow: 0 3px 8px var(--button-shadow);
}

#theme-toggle:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px var(--button-shadow);
}


#contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
    text-align: left;
}

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

.form-group label {
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--text-color);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    padding: 10px;
    border: 1px solid var(--lotto-number-border);
    border-radius: 5px;
    background-color: var(--lotto-number-bg); /* Use similar background for input fields */
    color: var(--text-color);
    font-size: 1em;
    transition: border-color 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    border-color: var(--generate-btn-bg); /* Highlight on focus */
    outline: none;
}

#submit-form-btn {
    padding: 12px 25px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 8px;
    background-color: var(--generate-btn-bg);
    color: var(--generate-btn-text);
    box-shadow: 0 4px 10px var(--button-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
    outline: none;
    align-self: center; /* Center the button within the flex container */
    margin-top: 10px;
}

#submit-form-btn:hover {
    background-color: var(--generate-btn-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--button-shadow);
}

#submit-form-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px var(--button-shadow);
}

#form-status {
    margin-top: 15px;
    font-weight: bold;
    color: var(--text-color);
}