:root {
    --bg-color: #f0f0f0;
    --container-bg: #ffffff;
    --text-color: #333333;
    --muted-bg: #eeeeee;
    --border-color: #d0d7de;
    --field-bg: #ffffff;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg-color);
    margin: 0;
    padding: 2rem 1rem;
    color: var(--text-color);
    transition: background-color 0.25s ease, color 0.25s ease;
}

body.dark-mode {
    --bg-color: #10141a;
    --container-bg: #1b2330;
    --text-color: #f1f4f8;
    --muted-bg: #273346;
    --border-color: #36465f;
    --field-bg: #141c27;
    --accent-color: #4ea5ff;
    --accent-hover: #2b8ef7;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    width: min(720px, 100%);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

.toolbar {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.toolbar-btn {
    padding: 0.4rem 0.75rem;
    font-size: 0.9rem;
    border: 1px solid rgba(128, 128, 128, 0.35);
    border-radius: 6px;
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.toolbar-btn:hover {
    background-color: rgba(128, 128, 128, 0.15);
}

h1 {
    margin-bottom: 2rem;
    color: var(--text-color);
}

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

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--muted-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
    animation: fadeIn 0.5s ease-in-out;
}

#generate-btn {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    color: white;
    background-color: var(--accent-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

.partner-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: left;
}

.partner-section h2 {
    margin: 0 0 0.5rem 0;
}

.partner-section p {
    margin: 0 0 1rem 0;
    opacity: 0.9;
}

#partner-form {
    display: grid;
    gap: 0.6rem;
}

#partner-form label {
    font-size: 0.92rem;
    font-weight: 600;
}

#partner-form input,
#partner-form textarea {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.7rem 0.8rem;
    background-color: var(--field-bg);
    color: var(--text-color);
    font-size: 0.95rem;
}

#partner-form textarea {
    resize: vertical;
    min-height: 120px;
}

#inquiry-submit-btn {
    margin-top: 0.5rem;
    padding: 0.8rem 1.1rem;
    font-size: 0.95rem;
    color: white;
    background-color: var(--accent-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

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

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

@media (max-width: 640px) {
    .container {
        padding: 1.25rem;
    }

    .lotto-numbers {
        gap: 0.5rem;
        flex-wrap: wrap;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}