:root {
    --main-bg-color: #f0f0f0;
    --number-bg-color: #ffffff;
    --number-text-color: #333333;
    --button-bg-color: #4CAF50;
    --button-text-color: white;
    --button-hover-bg-color: #45a049;
    --glow-color: rgba(76, 175, 80, 0.7);
    --form-bg-color: #ffffff;
    --form-text-color: #333333;
    --input-bg-color: #f0f0f0;
    --input-border-color: #ccc;
    --input-focus-border-color: #4CAF50;
}

body {
    font-family: 'Helvetica Neue', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    background-color: var(--main-bg-color);
    background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"%3E%3Cfilter id="noise"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="4" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%" height="100%" filter="url(%23noise)" opacity="0.05"/%3E%3C/svg%3E');
    gap: 20px;
}

.container {
    text-align: center;
    background: var(--form-bg-color);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1), 0 6px 6px rgba(0,0,0,0.05);
    width: 100%;
    max-width: 500px;
}

h1, h2 {
    font-size: 2.5rem;
    color: var(--form-text-color);
    margin-bottom: 30px;
}

h2 {
    font-size: 2rem;
}

.numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.number {
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background-color: var(--number-bg-color);
    color: var(--number-text-color);
    font-size: 1.8rem;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, background-color 0.3s;
}


button,
#generate,
#toggle-dark-mode {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s, transform 0.2s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

button:hover,
#generate:hover,
#toggle-dark-mode:hover {
    background-color: var(--button-hover-bg-color);
    box-shadow: 0 0 20px 5px var(--glow-color);
    transform: translateY(-2px);
}

button:active,
#generate:active,
#toggle-dark-mode:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

#toggle-dark-mode {
    margin-left: 10px;
}


/* Contact Form */
#contact-form form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#contact-form label {
    font-size: 1rem;
    font-weight: bold;
    color: var(--form-text-color);
    text-align: left;
}

#contact-form input,
#contact-form textarea {
    padding: 15px;
    border-radius: 10px;
    border: 1px solid var(--input-border-color);
    background-color: var(--input-bg-color);
    font-size: 1rem;
    color: var(--form-text-color);
    transition: border-color 0.3s;
}

#contact-form input:focus,
#contact-form textarea:focus {
    outline: none;
    border-color: var(--input-focus-border-color);
}

#contact-form textarea {
    min-height: 150px;
    resize: vertical;
}

/* Dark Mode */
body.dark-mode {
    --main-bg-color: #121212;
    --number-bg-color: #1e1e1e;
    --number-text-color: #ffffff;
    --button-bg-color: #bb86fc;
    --button-text-color: #000000;
    --button-hover-bg-color: #a063f0;
    --glow-color: rgba(187, 134, 252, 0.7);
    --form-bg-color: #1e1e1e;
    --form-text-color: #ffffff;
    --input-bg-color: #2a2a2a;
    --input-border-color: #444;
    --input-focus-border-color: #bb86fc;
}

body.dark-mode .container {
    background: var(--form-bg-color);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1), 0 6px 6px rgba(255, 255, 255, 0.05);
}

body.dark-mode h1,
body.dark-mode h2 {
    color: var(--form-text-color);
}


/* Responsive Design */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1, h2 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    .number {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .numbers {
        gap: 10px;
    }
}