:root {
    --bg-color: #f7f7f7;
    --container-bg: white;
    --text-color: #333;
    --h1-color: #333;
    --btn-grad-1: #007BFF;
    --btn-grad-2: #0056b3;
    --btn-shadow: rgba(0, 123, 255, 0.4);
    --container-shadow: rgba(0, 0, 0, 0.1);
    --number-text-color: white;
    --form-label-color: #555;
    --form-input-bg: #f0f0f0;
    --form-input-border: #ccc;
    --form-input-focus-border: #007BFF;
}

html[data-theme='dark'] {
    --bg-color: #1a1a1a;
    --container-bg: #2a2a2a;
    --text-color: #f0f0f0;
    --h1-color: #f0f0f0;
    --btn-grad-1: #0089ff;
    --btn-grad-2: #0061c2;
    --btn-shadow: rgba(0, 137, 255, 0.4);
    --container-shadow: rgba(0, 0, 0, 0.4);
    --number-text-color: white;
    --form-label-color: #bbb;
    --form-input-bg: #3a3a3a;
    --form-input-border: #555;
    --form-input-focus-border: #0089ff;
}

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

.container {
    position: relative;
    text-align: center;
    background-color: var(--container-bg);
    padding: 30px 40px;
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--container-shadow);
    transition: background-color 0.3s;
}

h1 {
    color: var(--h1-color);
    margin-bottom: 20px;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    min-height: 60px;
}

.number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--number-text-color);
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease-in-out, background-color 0.3s;
}

#generate-btn {
    background: linear-gradient(145deg, var(--btn-grad-1), var(--btn-grad-2));
    color: white;
    padding: 14px 28px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    border-radius: 12px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px var(--btn-shadow);
}

#generate-btn:hover {
    box-shadow: 0 6px 20px var(--btn-shadow);
    transform: translateY(-2px);
}

#generate-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px var(--btn-shadow);
}

/* Theme Switch Styles */
.theme-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 28px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--btn-grad-1);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* Form Styles */
h2 {
    color: var(--h1-color);
    margin-top: 30px;
    margin-bottom: 20px;
}

.contact-form {
    text-align: left;
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    border-radius: 8px;
    background-color: var(--container-bg); /* Use container background for form area */
}

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

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

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: calc(100% - 20px); /* Adjust for padding */
    padding: 10px;
    border: 1px solid var(--form-input-border);
    border-radius: 4px;
    background-color: var(--form-input-bg);
    color: var(--text-color);
    font-size: 16px;
    transition: border-color 0.3s, background-color 0.3s;
}

.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form textarea:focus {
    border-color: var(--form-input-focus-border);
    outline: none;
}

#submit-form-btn {
    background: linear-gradient(145deg, #28a745, #218838); /* Green gradient for submit */
    color: white;
    padding: 12px 25px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    border-radius: 8px;
    transition: all 0.3s;
    box-shadow: 0 4px 10px rgba(40, 167, 69, 0.4);
    width: 100%;
}

#submit-form-btn:hover {
    box-shadow: 0 6px 15px rgba(40, 167, 69, 0.5);
    transform: translateY(-2px);
}

#submit-form-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.4);
}