* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #111;
    color: #eee;
    font-family: Arial, sans-serif;
}

.card {
    width: min(90%, 380px);
    padding: 32px;
    background: #1c1c1c;
    border: 1px solid #444;
    border-radius: 12px;
    text-align: center;
}

h1 {
    margin: 0;
    font-size: 42px;
    letter-spacing: 5px;
}

.subtitle {
    margin: 5px 0 30px;
    color: #999;
    letter-spacing: 3px;
}

.status {
    margin-bottom: 20px;
    padding: 10px;
    border-radius: 6px;
    font-weight: bold;
}

.disconnected {
    background: #3a1d1d;
}

.connected {
    background: #17351f;
}

label {
    display: block;
    margin: 25px 0 8px;
    color: #aaa;
    font-size: 13px;
    letter-spacing: 2px;
}

input {
    width: 100%;
    padding: 15px;
    margin-bottom: 12px;
    background: #111;
    color: white;
    border: 1px solid #555;
    border-radius: 6px;
    font-size: 28px;
    text-align: center;
    letter-spacing: 8px;
}

button {
    width: 100%;
    padding: 14px;
    border: 0;
    border-radius: 6px;
    background: #eee;
    color: #111;
    font-weight: bold;
    cursor: pointer;
}

button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

#message {
    min-height: 20px;
    margin-top: 20px;
    color: #aaa;
    font-size: 14px;
}