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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #fff;
}

.container {
    text-align: center;
    padding: 20px;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

h2 {
    font-size: 1.8em;
    margin-bottom: 20px;
}

.menu {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

.btn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    border: none;
    padding: 12px 30px;
    margin: 10px;
    font-size: 16px;
    border-radius: 25px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    font-weight: bold;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(0);
}

#multiplayerOptions {
    margin-top: 20px;
}

#roomId {
    padding: 10px 15px;
    font-size: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    margin: 10px;
    width: 250px;
}

#roomId::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

#gameContainer {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

#gameInfo {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 1.2em;
    font-weight: bold;
}

#gameCanvas {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    background: linear-gradient(180deg, #1e3c72 0%, #2a5298 100%);
    display: block;
    margin: 0 auto;
}

#controls {
    margin-top: 15px;
}

#playerList {
    margin-top: 20px;
    text-align: left;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.player-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    margin: 5px 0;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
}

.hidden {
    display: none !important;
}

@media (max-width: 850px) {
    #gameCanvas {
        width: 100%;
        max-width: 800px;
        height: auto;
    }
    
    h1 {
        font-size: 2em;
    }
}