body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0b0f14;
    color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    text-align: center;
    max-width: 600px;
    padding: 20px;
}

.subtitle {
    color: #aaa;
}

.card {
    background: #121821;
    padding: 25px;
    border-radius: 12px;
    margin-top: 20px;
}

.code-box {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 15px 0;
}

.code-box span {
    background: #000;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: bold;
    letter-spacing: 2px;
}

button {
    background: #00e0b8;
    border: none;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
}

.join-btn {
    display: inline-block;
    margin-top: 15px;
    padding: 12px 20px;
    background: #00e0b8;
    color: #000;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
}

footer {
    margin-top: 40px;
    color: #777;
}