/* General Body and Layout */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden; /* Prevent global scrollbar */
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1a1a2e; /* Dark background */
    color: #e0e0e0; /* Light text */
    display: flex; /* This flex is still useful for the container */
    min-height: 100vh; /* Ensure body takes full height */
    /* Removed overflow-y: scroll; from here */
}

.container {
    display: flex;
    width: 100%;
    height: 100vh; /* Make container fill viewport height */
}

/* Sidebar Styling */
.sidebar {
    width: 300px;
    background-color: #16213e; /* Slightly darker than body */
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    position: fixed; /* Changed from sticky to fixed */
    top: 0;
    left: 0; /* Align to the left edge */
    height: 100vh; /* Full viewport height */
    overflow-y: auto; /* Scrollable if content overflows */
    box-sizing: border-box; /* Include padding in width */
    z-index: 100; /* Ensure sidebar is above main content if any overlap */
}

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

.sidebar-header .logo {
    width: 50px;
    height: auto;
    margin-right: 10px;
}

.sidebar h2 {
    color: #e0e0e0;
    margin: 0;
    font-size: 1.5em;
}

.sidebar h3 {
    color: #e0e0e0;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.sidebar-link {
    display: block;
    padding: 10px 15px;
    margin-bottom: 5px;
    color: #90b8f8; /* Light blue for links */
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.sidebar-link:hover {
    background-color: #0f3460; /* Darker blue on hover */
}

.sidebar hr {
    border: none;
    border-top: 1px solid #0f3460;
    margin: 20px 0;
}

/* Folder Management */
.folder-management .expander summary {
    cursor: pointer;
    padding: 10px 0;
    color: #90b8f8;
    font-weight: bold;
}

.folder-management .expander[open] summary {
    color: #e0e0e0; /* Change color when open */
}

.folder-management input[type="text"] {
    width: calc(100% - 20px);
    padding: 8px 10px;
    margin-top: 10px;
    border: 1px solid #0f3460;
    border-radius: 4px;
    background-color: #2c3e50;
    color: #e0e0e0;
}

.folder-selector-form {
    margin-top: 15px;
}

.folder-radio-group {
    margin-bottom: 10px;
}

.folder-radio-group label {
    display: block;
    margin-bottom: 5px;
    cursor: pointer;
    font-size: 0.9em;
    color: #c0c0c0;
}

.folder-radio-group input[type="radio"] {
    margin-right: 8px;
}

/* Chat Actions */
.chat-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.chat-history-sidebar {
    max-height: 300px; /* Fixed height for sidebar chat history */
    overflow-y: auto;
    border: 1px solid #0f3460;
    border-radius: 5px;
    padding: 10px;
    background-color: #2c3e50;
    font-size: 0.85em;
}

.chat-history-sidebar .chat-message {
    margin-bottom: 8px;
    padding: 5px;
    border-radius: 4px;
}

.chat-history-sidebar .chat-message.user {
    background-color: #0f3460;
    text-align: left;
}

.chat-history-sidebar .chat-message.assistant {
    background-color: #3e2c50;
    text-align: left;
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    margin-left: 300px; /* Offset for the fixed sidebar */
    padding: 20px 40px;
    box-sizing: border-box;
    /* Removed max-width: calc(100% - 300px); as it's redundant with flex-grow and margin-left */
    padding-bottom: 100px; /* Add padding to prevent content from being hidden by sticky footer */
    overflow-y: auto; /* Make main content scrollable */
    height: 100vh; /* Ensure it takes full height for overflow to work */
}

/* Home Screen Specific */
.home-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 40px); /* Adjust for main-content padding */
    text-align: center;
}

.centered-content {
    display: flex; /* Make it a flex container */
    flex-direction: column; /* Stack children vertically */
    align-items: center; /* Center children horizontally */
    width: 100%;
    max-width: 600px;
}

.centered-text {
    color: #e0e0e0;
    font-size: 2.5em;
    margin-bottom: 30px;
}

.initial-search-form {
    display: flex;
    justify-content: center;
    width: 100%; /* Ensure it takes full width for centering */
}

.initial-search-input {
    width: 80%;
    padding: 15px 20px;
    border: 2px solid #90b8f8;
    border-radius: 30px;
    background-color: #2c3e50;
    color: #e0e0e0;
    font-size: 1.2em;
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.initial-search-input::placeholder {
    color: #a0a0a0;
}

.initial-search-input:focus {
    border-color: #0f3460;
    box-shadow: 0 0 10px rgba(144, 184, 248, 0.5);
}

/* Chat Interface */
.chat-interface {
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative; /* Needed for loading overlay positioning */
}

/* Sticky Chat Input Container */
.chat-input-container {
    position: sticky;
    bottom: 0;
    /* Removed 'left: 0;' as it's redundant for a sticky element within a flow */
    width: 100%;
    background-color: #1a1a2e; /* Match body background */
    padding: 20px 0; /* Add vertical padding */
    box-sizing: border-box;
    z-index: 1000; /* Ensure it stays on top */
    border-top: 1px solid #0f3460; /* Optional: a subtle border */
}

.chat-input-form {
    display: flex;
    gap: 10px;
    max-width: 900px; /* Limit width to match content */
    margin: 0 auto; /* Center the form within its container */
    padding: 0 20px; /* Horizontal padding */
}

.chat-input-form input[type="text"] {
    flex-grow: 1;
    padding: 12px 15px;
    border: 1px solid #0f3460;
    border-radius: 25px;
    background-color: #2c3e50;
    color: #e0e0e0;
    font-size: 1em;
}

.chat-input-form button {
    padding: 12px 25px;
    background-color: #90b8f8;
    color: #1a1a2e;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease;
}

.chat-input-form button:hover {
    background-color: #7a9fd8;
}

/* Search Results and Library Items */
.search-result-card, .library-item-card {
    background-color: #2c3e50;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);

    /* Animation properties for search result cards */
    opacity: 0; /* Start hidden */
    transform: translateY(20px); /* Start slightly below */
    animation: fade-in-slide-up 0.5s ease-out forwards; /* Apply animation, delay set by JS */
}

.search-result-card h3, .library-item-card h3 {
    margin-top: 0;
    color: #90b8f8;
    font-size: 1.3em;
}

.search-result-card h3 a, .library-item-card h3 a {
    color: #90b8f8;
    text-decoration: none;
}

.search-result-card h3 a:hover, .library-item-card h3 a:hover {
    text-decoration: underline;
}

.caption {
    font-size: 0.9em;
    color: #b0b0b0;
    margin-bottom: 5px;
}

.snippet {
    margin-top: 15px;
    margin-bottom: 15px;
    line-height: 1.6;
    color: #c0c0c0;
}

.link-button {
    display: inline-block;
    padding: 5px 10px;
    background-color: #0f3460;
    color: #e0e0e0;
    text-decoration: none;
    border-radius: 5px;
    margin-right: 10px;
    font-size: 0.9em;
    transition: background-color 0.3s ease;
}

.link-button:hover {
    background-color: #1a1a2e;
}

.action-buttons {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap; /* Allow buttons to wrap */
    gap: 10px; /* Space between buttons */
    align-items: center;
}

.action-buttons button {
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
    transition: background-color 0.3s ease;
    background-color: #4a5d7a; /* Default button color */
    color: #e0e0e0;
}

.action-buttons button:hover:not(:disabled) {
    background-color: #5b7294;
}

.action-buttons button:disabled {
    background-color: #3a4a5c;
    color: #808080;
    cursor: not-allowed;
}

.button-save {
    background-color: #28a745; /* Green for save */
}

.button-save:hover:not(:disabled) {
    background-color: #218838;
}

.button-delete {
    background-color: #dc3545; /* Red for delete */
}

.button-delete:hover:not(:disabled) {
    background-color: #c82333;
}

.button-small {
    padding: 6px 12px;
    font-size: 0.85em;
    background-color: #4a5d7a;
    color: #e0e0e0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.button-small:hover {
    background-color: #5b7294;
}


.save-folder-select {
    padding: 7px 10px;
    border: 1px solid #0f3460;
    border-radius: 5px;
    background-color: #2c3e50;
    color: #e0e0e0;
    font-size: 0.9em;
    margin-right: 5px;
    cursor: pointer;
}

.save-folder-select option {
    background-color: #2c3e50;
    color: #e0e0e0;
}

/* Expander (details/summary) styling */
details.expander {
    margin-top: 15px;
    background-color: #3a4a5c; /* Slightly lighter than card for contrast */
    border-radius: 5px;
    padding: 10px 15px;
}

details.expander summary {
    cursor: pointer;
    font-weight: bold;
    color: #e0e0e0;
    outline: none; /* Remove default outline on focus */
}

details.expander summary::-webkit-details-marker {
    display: none; /* Hide default arrow */
}

details.expander summary:before {
    content: '▶'; /* Custom arrow */
    margin-right: 10px;
    transition: transform 0.2s;
    display: inline-block;
}

details.expander[open] summary:before {
    content: '▼'; /* Custom arrow when open */
    transform: rotate(0deg);
}

.summary-content, .annotation-content, .snippet-content {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #4a5d7a;
    color: #c0c0c0;
    line-height: 1.6;
    white-space: pre-wrap; /* Preserve line breaks from |linebreaksbr */
}

.citations-block {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #4a5d7a;
    color: #c0c0c0;
    line-height: 1.6;
}

.citations-block p {
    margin-bottom: 5px;
}

.citations-block strong {
    color: #90b8f8;
}

/* Messages (Django messages framework) */
.messages {
    list-style: none;
    padding: 0;
    margin: 0 0 20px 0;
}

.messages li {
    padding: 10px 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    font-weight: bold;
    color: #1a1a2e; /* Dark text for messages */
}

.messages .success {
    background-color: #d4edda; /* Light green */
    color: #155724; /* Dark green text */
    border: 1px solid #c3e6cb;
}

.messages .info {
    background-color: #d1ecf1; /* Light blue */
    color: #0c5460; /* Dark blue text */
    border: 1px solid #bee5eb;
}

.messages .warning {
    background-color: #fff3cd; /* Light yellow */
    color: #856404; /* Dark yellow text */
    border: 1px solid #ffeeba;
}

.messages .error {
    background-color: #f8d7da; /* Light red */
    color: #721c24; /* Dark red text */
    border: 1px solid #f5c6cb;
}

/* Utility classes */
.centered-text {
    text-align: center;
}

.info-message {
    background-color: #2c3e50;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    color: #c0c0c0;
    margin-top: 20px;
}

/* Local Loading Indicator for Home Screen */
.local-loading-indicator {
    padding: 15px 40px; /* Adjust padding to match image */
    background-color: #3e5060; /* Dark blue-grey, similar to image */
    color: #e0e0e0;
    border: none; /* No border as per image */
    border-radius: 25px; /* Rounded corners */
    font-size: 1.5em; /* Larger text for visibility */
    font-weight: bold;
    /* Updated box-shadow for subtle blue glow */
    box-shadow: 0 0 10px 2px rgba(144, 184, 248, 0.3); 
    animation: pulse 1.5s infinite ease-in-out; /* Pulsing animation */
    
    /* Positioning for the home screen specific loading indicator */
    margin-top: 30px; /* Space below search input */
    display: inline-block; /* To allow margin auto for centering */
    opacity: 0; /* Start hidden */
    visibility: hidden; /* Start hidden */
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.local-loading-indicator.active {
    opacity: 1;
    visibility: visible;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Keyframes for fade-in and slide-up animation */
@keyframes fade-in-slide-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: relative; /* No longer fixed on small screens, allow scrolling with content */
        height: auto;
        max-height: 400px; /* Limit sidebar height on mobile */
        margin-left: 0; /* Remove fixed margin on mobile */
    }

    .main-content {
        max-width: 100%;
        padding: 15px;
        padding-bottom: 100px; /* Adjust padding for sticky footer */
        margin-left: 0; /* Remove fixed margin on mobile */
        height: auto; /* Allow height to adjust on mobile */
        overflow-y: visible; /* Allow content to push height on mobile */
    }

    .home-screen {
        min-height: auto;
        padding: 20px 0;
    }

    .initial-search-input {
        width: 90%;
        font-size: 1em;
    }

    .chat-message {
        max-width: 95%;
    }

.chat-input-form {
    display: flex;
    gap: 10px;
    /* Removed max-width and margin auto to allow the form to stretch */
    /* max-width: 900px; */
    /* margin: 0 auto; */
    padding: 0 20px; /* This padding now defines the inner spacing, aligning with card content */
}

    .chat-input-form input[type="text"] {
        width: calc(100% - 30px); /* Adjust for padding */
    }

    .chat-input-form button {
        width: 100%;
    }

    .action-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .action-buttons button, .save-folder-select {
        width: 100%;
        margin-right: 0 !important;
    }
}