:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --btn-bg: #6200ee;
    --btn-hover: #7f39fb;
    --btn-shadow: rgba(0, 0, 0, 0.2);
    --btn-glow: rgba(127, 57, 251, 0.4);
    --bg-pattern-opacity: 0.02;
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #ffffff;
    --btn-shadow: rgba(0, 0, 0, 0.5);
    --btn-glow: rgba(127, 57, 251, 0.7);
    --bg-pattern-opacity: 0.05;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4'%3E%3Cpath fill='%23888888' fill-opacity='0.05' d='M0 2h2V0h2v4H0V2zm0 2h2v-2H0v2z'/%3E%3C/svg%3E");
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    text-align: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 500px;
    width: 100%;
    padding: 2rem;
}

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
}

#theme-btn {
    background: none;
    border: 2px solid var(--text-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

#generate-btn {
    background-color: var(--btn-bg);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px var(--btn-shadow);
}

#generate-btn:hover {
    background-color: var(--btn-hover);
    box-shadow: 0 0 20px var(--btn-glow);
}

lotto-numbers {
    display: block;
    margin-top: 2rem;
}

.contact-form {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--text-color);
    text-align: left;
}

.contact-form h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--text-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
    box-sizing: border-box;
}

#submit-btn {
    width: 100%;
    background-color: var(--btn-bg);
    color: white;
    border: none;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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