* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --text-color: #ffffff;
    --body-gradient-dark: #333333;
    --container-bg: rgba(42, 42, 42, 0.8);
    --container-border: rgba(255, 255, 255, 0.1);
    --container-shadow: rgba(0, 0, 0, 0.5);
    --number-bg: #333333;
    --number-shadow: rgba(0, 0, 0, 0.3);
    --number-inset-shadow: rgba(0, 0, 0, 0.5);
    --heading-shadow: rgba(255, 255, 255, 0.2);
    --primary-btn-bg: #007bff;
    --primary-btn-bg-hover: #0056b3;
    --primary-btn-shadow: rgba(0, 123, 255, 0.4);
    --primary-btn-ring: rgba(0, 123, 255, 0.2);
    --primary-btn-shadow-hover: rgba(0, 123, 255, 0.6);
    --primary-btn-ring-hover: rgba(0, 123, 255, 0.3);
    --form-bg: rgba(0, 0, 0, 0.15);
    --form-border: rgba(255, 255, 255, 0.18);
    --form-placeholder: rgba(255, 255, 255, 0.7);
}

body[data-theme="light"] {
    --text-color: #1d2633;
    --body-gradient-dark: #d5deea;
    --container-bg: rgba(255, 255, 255, 0.85);
    --container-border: rgba(29, 38, 51, 0.12);
    --container-shadow: rgba(40, 61, 84, 0.15);
    --number-bg: #e6edf5;
    --number-shadow: rgba(40, 61, 84, 0.2);
    --number-inset-shadow: rgba(255, 255, 255, 0.7);
    --heading-shadow: rgba(31, 52, 78, 0.15);
    --primary-btn-bg: #0d6efd;
    --primary-btn-bg-hover: #0b5ed7;
    --primary-btn-shadow: rgba(13, 110, 253, 0.35);
    --primary-btn-ring: rgba(13, 110, 253, 0.2);
    --primary-btn-shadow-hover: rgba(13, 110, 253, 0.5);
    --primary-btn-ring-hover: rgba(13, 110, 253, 0.3);
    --form-bg: rgba(255, 255, 255, 0.65);
    --form-border: rgba(29, 38, 51, 0.2);
    --form-placeholder: rgba(29, 38, 51, 0.65);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #1a1a1a;
    color: var(--text-color);
    background-image: linear-gradient(45deg, var(--body-gradient-dark) 25%, transparent 25%), 
                      linear-gradient(-45deg, var(--body-gradient-dark) 25%, transparent 25%), 
                      linear-gradient(45deg, transparent 75%, var(--body-gradient-dark) 75%), 
                      linear-gradient(-45deg, transparent 75%, var(--body-gradient-dark) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    position: relative;
    text-align: center;
    width: min(920px, 94vw);
    padding: 2rem;
    background-color: var(--container-bg);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px var(--container-shadow), 0 0 0 1px var(--container-border);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 10px var(--heading-shadow);
}

.theme-toggle-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.9rem;
    padding: 0.45rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--container-border);
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.theme-toggle-btn:hover {
    transform: translateY(-1px);
    background-color: var(--container-border);
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.number {
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    border-radius: 50%;
    background-color: var(--number-bg);
    color: var(--text-color);
    box-shadow: 0 4px 10px var(--number-shadow), inset 0 2px 4px var(--number-inset-shadow);
    transition: all 0.3s ease;
}

.generate-btn {
    font-size: 1.2rem;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 50px;
    background-color: var(--primary-btn-bg);
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px var(--primary-btn-shadow), 0 0 0 2px var(--primary-btn-ring);
}

.generate-btn:hover {
    background-color: var(--primary-btn-bg-hover);
    box-shadow: 0 8px 25px var(--primary-btn-shadow-hover), 0 0 0 4px var(--primary-btn-ring-hover);
    transform: translateY(-2px);
}

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

.contact-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--container-border);
}

.contact-section h2 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

.contact-form {
    display: grid;
    gap: 0.75rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border-radius: 10px;
    border: 1px solid var(--form-border);
    background-color: var(--form-bg);
    color: var(--text-color);
    font: inherit;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--form-placeholder);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-btn-bg);
    box-shadow: 0 0 0 3px var(--primary-btn-ring);
}

.contact-submit-btn {
    font-size: 1rem;
    padding: 0.75rem 1.1rem;
    border: none;
    border-radius: 10px;
    background-color: var(--primary-btn-bg);
    color: #fff;
    cursor: pointer;
    transition: all 0.25s ease;
}

.contact-submit-btn:hover {
    background-color: var(--primary-btn-bg-hover);
}

.comments-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--container-border);
}

.comments-section h2 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

#disqus_thread {
    text-align: left;
}

.comments-section noscript {
    display: block;
    margin-top: 0.75rem;
    color: var(--form-placeholder);
}

@media (max-width: 600px) {
    .container {
        width: 90%;
    }

    .lotto-numbers {
        flex-wrap: wrap;
    }

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