body {
    font-family: "Helvetica", Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: #f0f2f5;
    /* background-image:url("https://www.nasachina.cn/wp-content/uploads/2025/03/NGC1672B_Hubble_4000.jpg"); */
    background-size: cover;
}
footer {
  text-align: center;
  padding: 5px;
  background-color: #dce7e7;
  color: #000;
}
.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

#chat-title {
    padding: 12px 24px;
    background:#6f42c1;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    font-size: 36px;
    width:326px;
}

#chat-box {
    height: 480px;
    width :50%;
    overflow-y: auto;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(76, 147, 197, 0.1);
}

#chat-box-full {
    height: 480px;
    width :100%;
    overflow-y: auto;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(76, 147, 197, 0.1);
}

#idea-box {
    height: 480px;
    width: 50%;
    overflow-y: auto;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(120, 160, 213, 0.1);
}

.user-msg, .bot-msg {
    margin: 10px 0;
    padding: 15px;
    border-radius: 8px;
    max-width: 100%;
}

.user-msg {
    background: #e3f2fd;
    margin-left: auto;
}

.bot-msg {
    background: #f5f5f5;
    margin-right: auto;
}

.input-area {
    display: flex;
    padding: 20px;
    border-top: 1px solid #eee;
}

.section-area {
    display: flex;
    justify-content: center;
    padding: 0px;
    border-top: 1px solid #eee;
}

input {
    flex: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin-right: 10px;
}

button {
    padding: 6px 48px;
    background: #51a5f4;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    /* width: 17%; */
}

button:hover {
    color: black;
    background: #a3ff40;
}