/* Reset basic CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 1. UNIVERSAL BODY STYLE (Basic) */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f7f7f8;
    color: #1f2328;
    /* display: flex; */
    /* height: 100vh; */
    /* overflow: hidden; Preventing body scroll */
}

/* 2. SPECIAL BODY STYLE FOR CHAT PAGE */
/* This selector ensures that the style only applies if the body is NOT a landing page */
body:not(.landing-page) { 
    display: flex;
    height: 100vh;
    overflow: hidden; /* Preventing body scroll */
}

/* --- 3. STYLE FOR LANDING PAGE (index.html) --- */

.landing-page { /* Using the class added in index.html */
    display: flex;
    align-items: center; 
    justify-content: center; 
    text-align: center; 
    height: 100vh;
}

/* --- Style untuk Landing Page (index.html) --- */
body.landing-page {
    background-color: #f0f2f5; /* Warna abu-abu yang bersih */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: auto; /* Mengganti overflow:hidden dari body utama */
}

.landing-container { 
    max-width: 600px; 
    padding: 20px; 
}
.landing-container h1 { 
    font-size: 2.5em; 
    margin-bottom: 20px; 
}
.landing-container p { 
    font-size: 1.2em; 
    margin-bottom: 30px; 
    color: #555; 
}
.start-chat-btn {
    display: inline-block;
    padding: 15px 30px;
    background-color: #4a4aef;
    color: white;
    text-decoration: none;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 8px;
    /* Add hover or other styles if needed */
}

/* --- 1. Sidebar (Left) --- */
.sidebar {
    width: 260px;
    background-color: #ffffff;
    border-right: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    padding: 16px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.new-chat-btn {
    flex-grow: 1;
    padding: 12px;
    background-color: #4a4aef; 
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.95em;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    text-decoration: none; /* Added so that the link is not underlined */
}

.new-chat-btn i {
    margin-right: 8px;
}

.search-btn {
    padding: 10px 12px;
    border: 1px solid #ccc;
    background-color: #fff;
    border-radius: 8px;
    cursor: pointer;
}

.chat-history {
    flex-grow: 1; /* Filling the remaining space with history */
    overflow-y: auto; /* Scroll if history is full */
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding: 0 8px;
}

.history-header h3 {
    font-size: 0.8em;
    color: #6c757d;
    font-weight: 600;
}

.history-header .clear-all {
    font-size: 0.8em;
    color: #6c757d;
    text-decoration: none;
}

.chat-history ul {
    list-style: none;
}

.chat-history li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-history li:hover,
.chat-history li.active {
    background-color: #f0f0f0;
}

.chat-history li i {
    color: #6c757d;
}

.sidebar-footer {
    border-top: 1px solid #e0e0e0;
    padding-top: 16px;
}

.sidebar-footer ul {
    list-style: none;
}

.sidebar-footer li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
}

.sidebar-footer li:hover {
    background-color: #f0f0f0;
}

.sidebar-footer .avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: #ddd;
}

/* --- 2. Chat Area (Right) --- */
.chat-area {
    flex-grow: 1; /* Filling the remaining space */
    display: flex;
    flex-direction: column;
    background-color: #ffffff;
    height: 100vh;
}

.chat-header {
    padding: 20px;
    border-bottom: 1px solid #e0e0e0;
    font-size: 1.1em;
    font-weight: 600;
    flex-shrink: 0; /* Preventing headers from shrinking */
}

.chat-log {
    flex-grow: 1; /* Filling the center space */
    overflow-y: auto; /* This is a scrollable chat area. */
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px; /* Distance between messages */
}

/* --- STYLE FOR EMPTY STATE --- */
.empty-chat-placeholder {
    flex-grow: 1; /* Ensuring placeholders fill the chat log space */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #aaa;
}

.empty-chat-placeholder i {
    font-size: 4em;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-chat-placeholder h2 {
    font-size: 1.5em;
    font-weight: 500;
}
/* ------------------------------- */


/* Styling for each message (Saved for later when you add a chat) */
.chat-message {
    display: flex;
    gap: 16px;
    max-width: 90%; /* So that it is not too wide */
}

.chat-message .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.chat-message.user .avatar {
    background-color: #cce5ff;
}

.chat-message.bot .avatar {
    background-color: #d1e7dd;
}

.message-content {
    padding-top: 8px;
}

.message-content strong { /* For title Enviro Education Tools Chatbot */
    display: block;
    margin-bottom: 4px;
    font-size: 1.05em;
}

.message-content p, 
.message-content ol {
    line-height: 1.6;
}

.message-content ol {
    padding-left: 20px; /* Indentation for ordered lists */
    margin-top: 10px;
}

.message-content li {
    margin-bottom: 8px;
}

/* Input Area Below */
.chat-input-area {
    padding: 24px;
    border-top: 1px solid #e0e0e0;
    background-color: #fff;
    flex-shrink: 0; /* Preventing the input area from shrinking */
}

.input-wrapper {
    display: flex;
    position: relative;
    max-width: 900px; /* Limit input width */
    margin: 0 auto;
}

.chat-input-area input {
    flex-grow: 1;
    padding: 16px 50px 16px 20px; /* Make space for the send button */
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1em;
}

.chat-input-area input:focus {
    outline: none;
    border-color: #4a4aef;
    box-shadow: 0 0 0 2px #4a4aef30;
}

.send-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background-color: #4a4aef;
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%; /* Make a circle */
    font-size: 1.1em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* The “Upgrade” tab on the right side */
.upgrade-tab {
    position: fixed;
    top: 50%;
    right: -60px; /* Adjust the position so that it sticks out slightly. */
    transform: translateY(-50%) rotate(-90deg);
    background-color: #4a4aef;
    color: white;
    padding: 10px 20px;
    font-size: 0.9em;
    font-weight: bold;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    cursor: pointer;
    z-index: 10;
}