body {
    background: #0a0a0a;
    font-family: 'Arial', sans-serif;
    color: white;
    margin: 0;
    padding: 0;
}

.container {
    width: 90%;
    max-width: 800px;
    margin: 40px auto;
    background: #111;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(255, 0, 255, 0.7);
    border: 2px solid;
    border-image: linear-gradient(45deg, #ff00ff, #00ffff, #ffcc00) 1;
}

h1 {
    color: #00ffff;
    text-align: center;
    text-shadow: 0 0 10px rgba(255, 0, 255, 0.7);
}

#chat-box {
    height: 300px;
    overflow-y: auto;
    background: #0a0a0a;
    padding: 10px;
    border: 1px solid #ff00ff;
    border-radius: 5px;
    margin-bottom: 10px;
}

input, textarea {
    width: calc(100% - 22px);
    padding: 10px;
    background: #1a1a1a;
    border: 1px solid #ff00ff;
    color: white;
    border-radius: 5px;
    margin-bottom: 10px;
}

button {
    width: 100%;
    padding: 10px;
    background: linear-gradient(45deg, #ff00ff, #00ffff);
    border: none;
    color: white;
    font-size: 16px;
    margin-top: 5px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    box-shadow: 0 0 10px rgba(255, 0, 255, 0.5);
}

button:hover {
    background: linear-gradient(45deg, #00ffff, #ffcc00);
}

.message {
    background: linear-gradient(90deg, #1a1a2e, #16213e);
    padding: 10px;
    margin: 8px 0;
    border-left: 4px solid #00ffff;
    border-radius: 0 5px 5px 0;
    box-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

.message b {
    color: #ff00ff;
    font-weight: bold;
}

.message .heure {
    color: #ffcc00;
    font-size: 0.8em;
    margin-left: 5px;
}
.heure {
    color: #ffcc00;
    font-size: 0.9em;
    font-weight: bold;
}