#tiai-chat {

    width: 100%;
    max-width: 420px;

    height: 620px;

    border: 1px solid #ddd;

    border-radius: 18px;

    overflow: hidden;

    background: #ffffff;

    box-shadow:
        0 10px 40px
        rgba(0,0,0,0.12);

    font-family:
        Arial,
        sans-serif;

    display: flex;

    flex-direction: column;

}

#tiai-header {

    padding: 18px;

    background: #123b66;

    color: #fff;

    display: flex;

    flex-direction: column;

    gap: 5px;

}

#tiai-header span {

    font-size: 12px;

    opacity: 0.8;

}

#tiai-messages {

    flex: 1;

    padding: 18px;

    overflow-y: auto;

    background: #f7f8fa;

}

.tiai-message {

    max-width: 82%;

    padding: 11px 14px;

    margin-bottom: 12px;

    border-radius: 14px;

    line-height: 1.5;

    font-size: 14px;

    white-space: pre-wrap;

}

.tiai-message.ai {

    background: #ffffff;

    border: 1px solid #e5e5e5;

}

.tiai-message.user {

    margin-left: auto;

    background: #123b66;

    color: #fff;

}

.tiai-message.typing {

    opacity: 0.6;

}

#tiai-input-area {

    display: flex;

    padding: 12px;

    border-top: 1px solid #ddd;

    background: #fff;

}

#tiai-input {

    flex: 1;

    border: 1px solid #ddd;

    border-radius: 10px;

    padding: 12px;

    outline: none;

}

#tiai-send {

    margin-left: 8px;

    border: 0;

    border-radius: 10px;

    padding: 0 18px;

    background: #123b66;

    color: white;

    cursor: pointer;

}

#tiai-send:disabled {

    opacity: 0.5;

    cursor: not-allowed;

}