body {
    margin: 0;
    font-family: "Helvetica Neue", Arial, sans-serif;
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
}

/* Main content */
.main {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Landing screen */
.landing {
    text-align: center;
    margin-top: 15%;
}

.landing h1 {
    font-weight: 500;
    font-size: 22px;
    margin-bottom: 20px;
}

.input-box {
    display: flex;
    align-items: center;
    width: 500px;
    max-width: 90%;
    border: 1px solid #ddd;
    border-radius: 30px;
    padding: 12px 20px;
    background: white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    margin: 0 auto 30px;
}

.input-box input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 15px;
    color: #555;
}

.bottom-banner {
    font-size: 12px;
    color: #555;
    padding: 10px 20px;
    background: #f0f0f0;
    border-radius: 10px;
    display: inline-block;
}

/* Chat Window */
.chat-window {
    flex: 1;
    width: 100%;
    padding: 40px 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message-bubble {
    padding: 16px 20px;
    border-radius: 12px;
    max-width: 80%;
    line-height: 1.6;
    word-wrap: break-word;
    font-size: 15px;
}

/* User (right) */
.user {
    display: flex;
    justify-content: flex-end;
}

.user .message-bubble {
    background-color: #f0f2f5;
    color: #202123;
    border-radius: 12px 12px 0px 12px;
}

/* Bot (left) */
.bot {
    display: flex;
    justify-content: flex-start;
}

.bot .message-bubble {
    background-color: white;
    color: #202123;
    border: 1px solid #eaeaea;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    border-radius: 12px 12px 12px 0px;
}

/* Hidden state */
.hidden {
    display: none;
}