#card-game-container {
    max-width: 800px;
    margin: 0 auto;
    background: #1a1a1a;
    color: white;
    padding: 20px;
    border-radius: 10px;
    font-family: Arial, sans-serif;
}

#login-screen, #game-register-form {
    text-align: center;
    padding: 20px;
}

#login-screen input, #game-register-form input, #game-register-form select {
    display: block;
    margin: 10px auto;
    padding: 10px;
    width: 80%;
    max-width: 300px;
    border-radius: 5px;
    border: none;
}

#login-screen button, #game-register-form button {
    padding: 10px 20px;
    margin: 10px;
    border-radius: 5px;
    border: none;
    background: #4CAF50;
    color: white;
    cursor: pointer;
}

#main-game-screen {
    display: none;
}

.player-info {
    background: #333;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-around;
}

.battle-interface {
    text-align: center;
    margin-bottom: 20px;
}

.battle-interface button {
    padding: 15px 30px;
    margin: 10px;
    background: #f44336;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

.inventory {
    background: #222;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.item-card {
    border: 2px solid;
    border-radius: 5px;
    padding: 10px;
    text-align: center;
    cursor: pointer;
}

.item-card.common { border-color: gray; }
.item-card.uncommon { border-color: green; }
.item-card.rare { border-color: blue; }
.item-card.epic { border-color: purple; }
.item-card.legendary { border-color: orange; }
.item-card.mythic { border-color: red; }

.social-features {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.social-features button {
    padding: 10px 15px;
    background: #2196F3;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#battle-result {
    margin-top: 20px;
    padding: 15px;
    background: #333;
    border-radius: 5px;
    text-align: center;
}