@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --background-color: #f0f2f5;
    --text-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --container-background-color: #ffffff;
    --button-text-color: #ffffff;
    --toggle-background-color: #e6ecf5;
    --toggle-text-color: #1f2a37;
}

body[data-theme='dark'] {
    --primary-color: #6aa9ff;
    --secondary-color: #ffb74d;
    --background-color: #0f172a;
    --text-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.45);
    --container-background-color: #1e293b;
    --button-text-color: #0f172a;
    --toggle-background-color: #334155;
    --toggle-text-color: #f8fafc;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-image: url("data:image/svg+xml,%3Csvg width='42' height='44' viewBox='0 0 42 44' xmlns='http://www.w3.org/2000/svg'%3E%3Cg id='Page-1' fill='none' fill-rule='evenodd'%3E%3Cg id='brick-wall' fill='%239C92AC' fill-opacity='0.4'%3E%3Cpath d='M0 0h42v44H0V0zm1 1h40v20H1V1zM0 23h20v20H0V23zm22 0h20v20H22V23z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

body[data-theme='dark'] {
    background-image: url("data:image/svg+xml,%3Csvg width='42' height='44' viewBox='0 0 42 44' xmlns='http://www.w3.org/2000/svg'%3E%3Cg id='Page-1' fill='none' fill-rule='evenodd'%3E%3Cg id='brick-wall' fill='%23334155' fill-opacity='0.4'%3E%3Cpath d='M0 0h42v44H0V0zm1 1h40v20H1V1zM0 23h20v20H0V23zm22 0h20v20H22V23z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.container {
    text-align: center;
    background: var(--container-background-color);
    padding: 2rem 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px var(--shadow-color);
    max-width: 500px;
    width: 90%;
    container-type: inline-size;
    position: relative;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

lotto-display {
    display: block;
    margin: 2rem 0;
}

#generate-btn {
    background-color: var(--primary-color);
    color: var(--button-text-color);
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

#generate-btn:hover {
    background-color: #357abd;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

#theme-toggle-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    border: none;
    border-radius: 999px;
    background-color: var(--toggle-background-color);
    color: var(--toggle-text-color);
    padding: 0.45rem 0.85rem;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

#theme-toggle-btn:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

@container (max-width: 400px) {
    h1 {
        font-size: 2rem;
    }

    #generate-btn {
        font-size: 1rem;
        padding: 0.8rem 1.5rem;
    }

    #theme-toggle-btn {
        top: 12px;
        right: 12px;
        font-size: 0.8rem;
    }
}