body {
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #e0e0e0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 30px;
    background-color: #1e1e1e;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

h1, h2 {
    text-align: center;
    color: #00e5ff;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #aaa;
    margin-bottom: 30px;
}

/* Flash Messages */
.flash-message {
    background-color: #b71c1c;
    color: #ffdada;
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 5px;
    text-align: center;
    font-weight: bold;
}

/* Login Form */
.login-form label {
    font-size: 15px;
    color: #cccccc;
    margin-top: 15px;
}

.login-form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-form .form-group {
    width: 90%;
    max-width: 400px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

.login-form label {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 8px;
}

.login-form input,
.login-form select {
    padding: 12px;
    background-color: #2a2a2a;
    border: 1px solid #444;
    color: #fff;
    border-radius: 5px;
    font-size: 16px;
}

.flag {
    color: #d32f2f;
    background: none;
    padding: 0;
    font-weight: bold;
    border: none;
    font-size: 1rem;
}


/* Chat Messages */
.message {
    margin-bottom: 15px;
    padding: 15px;
    border-radius: 8px;
    background-color: #2c2c2c;
}

.message.user {
    border-left: 5px solid #00e5ff;
}

.message.assistant {
    border-left: 5px solid #4caf50;
}

/* Chat form input */
textarea {
    width: 100%;
    padding: 15px;
    background-color: #2a2a2a;
    border: 1px solid #444;
    color: #fff;
    border-radius: 5px;
    resize: vertical;
    font-size: 16px;
    margin-bottom: 15px;
}

/* Buttons */
button {
    padding: 10px 20px;
    background-color: #00e5ff;
    border: none;
    color: black;
    font-weight: bold;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #00bcd4;
}

/* Loading message */
.loading {
    background-color: #333;
    color: #00e5ff;
    padding: 10px;
    margin-top: 20px;
    border-left: 5px solid #00e5ff;
    border-radius: 5px;
    font-style: italic;
    font-size: 16px;
}

/* Logout link */
.logout-link {
    display: block;
    text-align: center;
    margin-top: 30px;
    color: #00e5ff;
    text-decoration: none;
    font-weight: bold;
}

.logout-link:hover {
    color: #00bcd4;
    text-decoration: underline;
}