body {
    background: radial-gradient(circle at top, #111, #000);
    color: #0f0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

body::before {
    content: "♠ ♥ Welcome to Gambling API ♦ ♣";
    font-size: 24px;
    color: #0f0;
    margin-bottom: 40px;
    display: block;
    text-shadow: 0 0 5px #0f0, 0 0 10px #0f0;
}

button {
    background-color: #0f0;
    color: #000;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 0 10px #0f0, 0 0 5px #0f0 inset;
    transition: background 0.2s ease-in-out, transform 0.2s;
}

button:hover {
    background-color: #1f1;
    transform: scale(1.05);
}

button.logout {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    font-size: 14px;
}

.balance {
    margin-top: 20px;
    color: #0f0;
    text-shadow: 0 0 5px #0f0, 0 0 10px #0f0;
}

.lobby-buttons {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.lobby-room {
    background: rgba(0, 0, 0, 0.7);
    border: 2px solid #0f0;
    border-radius: 12px;
    padding: 30px;
    margin-top: 40px;
    width: 400px;
    text-align: center;
    box-shadow: 0 0 10px #0f0;
}

.lobby-room h2 {
    color: #0f0;
    font-size: 20px;
    margin-bottom: 20px;
    text-shadow: 0 0 5px #0f0;
}

#player-list {
    color: #fff;
}

.hidden {
    display: none;
}

#join-form {
    margin-top: 20px;
    gap: 10px;
    display: none; /* default hidden */
}

#join-form:not(.hidden) {
    display: flex;
}

#join-form input {
    padding: 10px;
    border-radius: 8px;
    border: 2px solid #0f0;
    background-color: #111;
    color: #0f0;
    font-size: 16px;
    box-shadow: 0 0 5px #0f0 inset;
    width: 200px;
}

#join-form button {
    background-color: #0f0;
    color: #000;
    font-weight: bold;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: 0.2s;
}

.error-message {
    color: red;
    margin-top: 10px;
    font-weight: bold;
    text-shadow: 0 0 3px red;
}

.hidden {
    display: none;
}

#matrix-canvas {
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
    width: 100vw;
    height: 100vh;
    background: transparent;
    pointer-events: none;
}

.leaderboard {
    position: absolute;
    top: 100px;
    left: 20px;
    background: rgba(0, 0, 0, 0.7);
    border: 2px solid #0f0;
    border-radius: 10px;
    padding: 20px;
    width: 200px;
    color: #0f0;
    font-family: monospace;
    box-shadow: 0 0 10px #0f0;
    z-index: 1;
}

.leaderboard h3 {
    margin-top: 0;
    font-size: 18px;
    text-align: center;
    text-shadow: 0 0 5px #0f0;
}

.leaderboard ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.leaderboard li {
    margin: 5px 0;
    font-size: 14px;
    text-shadow: 0 0 3px #0f0;
}

.leaderboard li.you {
    font-weight: bold;
    color: #ff0;
    text-shadow: 0 0 5px #ff0;
}

.your-rank {
    margin-top: 10px;
    font-size: 14px;
    color: #fff;
    text-align: center;
    text-shadow: 0 0 3px #0f0;
}