body {
    font-family: 'Roboto', sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    width: 100%;
    max-width: 600px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#character-selection {
    padding: 40px;
    text-align: center;
}

#character-selection h1 {
    font-size: 1.8em;
    color: #333;
    margin-bottom: 10px;
}

#character-selection p {
    color: #666;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

select {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    font-size: 1em;
}

button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background-color: #007bff;
    color: white;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #0056b3;
}

.hidden {
    display: none;
}

#chat-container {
    height: 80vh;
    max-height: 700px;
}

.chat-header {
    background-color: #007bff;
    color: white;
    padding: 15px;
    text-align: center;
    font-size: 1.1em;
}

#chat-box {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    border-bottom: 1px solid #ddd;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    padding: 10px 15px;
    border-radius: 18px;
    max-width: 75%;
    line-height: 1.4;
}

.user-message {
    background-color: #007bff;
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.agent-message {
    background-color: #e9e9eb;
    color: #333;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.emotion-tag {
    font-size: 0.8em;
    margin-top: 5px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 500;
}

.emotion-tag.self-reported {
    color: #d1e7ff;
    background-color: rgba(0, 123, 255, 0.2);
    text-align: right;
}

.emotion-tag.detected {
    color: #fff3cd;
    background-color: rgba(255, 193, 7, 0.2);
    text-align: right;
}

.emotion-tag.target {
    color: #d4edda;
    background-color: rgba(40, 167, 69, 0.2);
    text-align: left;
    margin-left: 0;
}

#message-form {
    padding: 15px;
    background-color: #f9f9f9;
}

.input-area {
    display: flex;
    gap: 10px;
    align-items: center;
}

#message-input {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1em;
}

.emotion-reporter {
    display: flex;
    align-items: center;
    gap: 5px;
}

.emotion-reporter label {
    font-size: 0.9em;
    color: #555;
}

#emotion-select {
    width: auto;
    padding: 8px;
}

#message-form button {
    width: auto;
    padding: 10px 20px;
}

.loading-message {
    opacity: 0.7;
    background-color: #f0f0f0;
}

.loading-text {
    font-size: 1.2em;
    letter-spacing: 2px;
    animation: loadingDots 1.5s infinite;
}

@keyframes loadingDots {
    0%, 20% {
        opacity: 0.3;
    }
    50% {
        opacity: 1;
    }
    80%, 100% {
        opacity: 0.3;
    }
}