:root {
    --card-size: 150px;
    --primary-color: #2980b9;
    --secondary-color: #27ae60;
    --background-color: #ecf0f1;
    --font-color: #2c3e50;
    --card-background: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Heebo', sans-serif;
    background-color: var(--background-color);
    color: var(--font-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

h1 {
    color: var(--primary-color);
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 1px 1px 2px var(--shadow-color);
}

#game-container {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.card-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.card {
    width: var(--card-size);
    height: var(--card-size);
    background-color: var(--card-background);
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--shadow-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 6px solid;
    box-sizing: border-box;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

#letter-card {
    font-size: 5rem;
    font-weight: 700;
    color: var(--primary-color);
}

#category-card {
    background-size: 75%;
    background-repeat: no-repeat;
    background-position: center;
}

.card-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: #7f8c8d;
    margin: 0;
}

#draw-button {
    padding: 15px 30px;
    font-size: 1.2rem;
    font-family: 'Heebo', sans-serif;
    font-weight: 700;
    color: white;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

#draw-button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

#draw-button:active {
    transform: scale(0.98);
}

@media (max-width: 400px) {
    :root {
        --card-size: 120px;
    }
    h1 {
        font-size: 2.5rem;
    }
    #letter-card {
        font-size: 4rem;
    }
    #game-container {
        gap: 20px;
    }
}