* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #f0f2f5;
}

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

.login-form {
    max-width: 400px;
    margin: 50px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.login-form input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.login-form button {
    width: 100%;
    padding: 10px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.login-form button:hover {
    background: #0056b3;
}

/* Room page */
.tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 2px solid #ddd;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #666;
}

.tab-btn.active {
    color: #007bff;
    border-bottom: 2px solid #007bff;
    margin-bottom: -2px;
}

.tab-content {
    display: none;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

/* Chat area */
#messages {
    list-style: none;
    height: 300px;
    overflow-y: auto;
    border: 1px solid #eee;
    padding: 10px;
    margin-bottom: 10px;
}

#messages li {
    padding: 5px 0;
    border-bottom: 1px solid #f0f0f0;
}

#messageInput {
    width: calc(100% - 80px);
    padding: 8px;
    margin-right: 5px;
}

#sendMessage {
    width: 70px;
    padding: 8px;
}

/* Game board */
#gameBoard {
    display: grid;
    grid-template-columns: repeat(3, 60px);
    gap: 5px;
    margin: 20px 0;
}

.cell {
    width: 60px;
    height: 60px;
    border: 1px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
}

.cell:hover {
    background: #f0f0f0;
}

/* Watch Party */
#videoPlayer {
    width: 100%;
    max-width: 640px;
    margin: 20px 0;
}

.video-controls {
    margin: 10px 0;
}

.video-controls button {
    padding: 8px 15px;
    margin-right: 5px;
}

/* Users list */
#usersList {
    list-style: none;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    max-height: 200px;
    overflow-y: auto;
}