body {
    font-family: Arial, sans-serif;
    background: #1a1a1a;
    color: #fff;
    margin: 0;
    padding: 0;
}

.login-container {
    max-width: 400px;
    margin: 50px auto;
    padding: 20px;
    background: #2a2a2a;
    border-radius: 8px;
    text-align: center;
}

.login-container input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: none;
    border-radius: 4px;
}

.login-container button {
    background: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.error-message {
    color: red;
    margin-top: 10px;
}

.player-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.tabs {
    display: flex;
    margin-bottom: 20px;
}

.tab-button {
    padding: 10px 20px;
    background: #333;
    color: white;
    border: none;
    cursor: pointer;
}

.tab-button.active {
    background: #4CAF50;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.content-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.content-list button {
    background: #333;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 4px;
    cursor: pointer;
    text-align: left;
}

.content-list button:hover {
    background: #4CAF50;
}