/* Educational Platform Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Academic typography for student-friendly experience */
body {
    font-family: 'Inter', 'Open Sans', 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: #FFF6F8;
    color: #212121;
    line-height: 1.6;
    overflow-x: hidden;
    /* Performance optimizations */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    /* Memory optimization */
    contain: layout style;
}

/* High contrast mode support */
body.high-contrast {
    background-color: #000000;
    color: #ffffff;
}

body.high-contrast .header {
    background-color: #000000;
    border-bottom-color: #ffffff;
}


body.high-contrast .message-text {
    background-color: #1a1a1a;
    color: #ffffff;
    border: 1px solid #ffffff;
}

/* Educational App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 100%;
    margin: 0 auto;
    /* Performance optimizations */
    contain: layout style;
    will-change: auto;
}

/* Educational Header */
.header {
    background: #ffffff;
    border-bottom: 2px solid #F48FB1;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(233, 30, 99, 0.1);
    /* Performance optimizations */
    will-change: transform;
    transform: translateZ(0);
    contain: layout style;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}


.logo i {
    font-size: 1.5rem;
    color: #E91E63;
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #212121;
    font-family: 'Inter', sans-serif;
    margin: 0;
}

.institution-name {
    font-size: 0.75rem;
    color: #212121;
    font-weight: 500;
    display: block;
    margin-top: -2px;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Educational Layout Structure */
.main-layout {
    flex: 1;
    overflow: hidden;
}

/* Educational Buttons */
.btn-primary, .btn-secondary, .btn-accessibility {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Inter', sans-serif;
    /* Performance optimizations */
    will-change: transform, background-color;
    transform: translateZ(0);
    contain: layout style;
}

.btn-primary {
    background: #E91E63;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #C2185B;
    transform: translateY(-1px);
}

.btn-primary:disabled {
    background: #F48FB1;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #E91E63;
    color: white;
    border: 1px solid #E91E63;
}

.btn-secondary:hover {
    background: #C2185B;
    color: white;
}

.btn-accessibility {
    background: #FFF6F8;
    color: #212121;
    border: 1px solid #F48FB1;
    padding: 0.75rem;
}

.btn-accessibility:hover {
    background: #FFE4EC;
    color: #E91E63;
}

/* Educational Main Content */
.main-content {
    width: 100%;
    display: flex;
    flex-direction: row;
    overflow: hidden;
    background: #FFF6F8;
    position: relative;
    /* Performance optimizations */
    contain: layout style;
    will-change: auto;
}

/* Chat Layout - Two Column */
.chat-layout {
    flex: 1;
    display: flex;
    flex-direction: row;
    overflow: hidden;
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0; /* Allows flex item to shrink */
    transition: width 0.3s ease, flex 0.3s ease;
    /* Performance optimizations */
    will-change: width;
    contain: layout style;
}

/* Educational Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    max-width: 100%;
    margin: 0 auto;
    width: 100%;
    background: #FFF6F8;
    /* Performance optimizations */
    will-change: scroll-position;
    transform: translateZ(0);
    contain: layout style;
    /* Memory optimization */
    overscroll-behavior: contain;
}

/* Chat History Sidebar */
.chat-history-sidebar {
    width: 320px;
    min-width: 320px;
    background: #ffffff;
    border-left: 2px solid #F48FB1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width 0.3s ease, min-width 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
    opacity: 1;
    /* Performance optimizations */
    will-change: width, transform, opacity;
    contain: layout style;
}

/* Desktop: Hide by removing from layout flow */
.chat-history-sidebar.hidden {
    width: 0;
    min-width: 0;
    opacity: 0;
    overflow: hidden;
    border-left: none;
    padding: 0;
    margin: 0;
}

/* Ensure sidebar content is hidden when sidebar is hidden */
.chat-history-sidebar.hidden .history-content,
.chat-history-sidebar.hidden .history-header {
    display: none;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #F48FB1;
    background: #FFF6F8;
}

.history-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #212121;
    margin: 0;
    font-family: 'Inter', sans-serif;
}

.btn-history-toggle {
    background: transparent;
    border: none;
    color: #212121;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.btn-history-toggle:hover {
    background: #FFE4EC;
    color: #E91E63;
}

.history-content {
    flex: 1;
    overflow-y: auto;
    position: relative;
    /* Performance optimizations */
    will-change: scroll-position;
    contain: layout style;
}

.history-content::-webkit-scrollbar {
    width: 6px;
}

.history-content::-webkit-scrollbar-track {
    background: transparent;
}

.history-content::-webkit-scrollbar-thumb {
    background: #F48FB1;
    border-radius: 3px;
}

.history-content::-webkit-scrollbar-thumb:hover {
    background: #E91E63;
}

.history-loading,
.history-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    color: #212121;
    opacity: 0.7;
    min-height: 200px;
}

.history-loading i,
.history-empty i {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #F48FB1;
}

.history-loading span,
.history-empty p {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #212121;
}

.history-empty span {
    font-size: 0.8rem;
    color: #212121;
    opacity: 0.6;
}

.history-list {
    padding: 0.5rem;
}

.history-item {
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    background: #FFF6F8;
    border: 1px solid #F48FB1;
    cursor: pointer;
    transition: all 0.2s ease;
    /* Performance optimizations */
    will-change: background-color, transform;
    contain: layout style;
}

.history-item:hover {
    background: #FFE4EC;
    border-color: #E91E63;
    transform: translateX(-2px);
}

.history-item.active {
    background: #FFE4EC;
    border-color: #E91E63;
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    position: relative;
}

.history-item-time {
    font-size: 0.75rem;
    color: #212121;
    opacity: 0.6;
    font-weight: 500;
}

.history-item-user {
    font-size: 0.875rem;
    font-weight: 600;
    color: #212121;
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.history-item-bot {
    font-size: 0.8rem;
    color: #212121;
    opacity: 0.7;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.history-item-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: #94a3b8;
}

/* Delete Button for History Items */
.history-item-delete {
    background: transparent;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    opacity: 0.4;
    transition: all 0.2s ease;
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    /* Performance optimizations */
    will-change: opacity, background-color;
    contain: layout style;
}

.history-item:hover .history-item-delete {
    opacity: 0.7;
}

.history-item-delete:hover {
    opacity: 1;
    background: #FFE4EC;
    color: #E91E63;
}

.history-item-delete:active {
    background: #F48FB1;
    transform: scale(0.95);
}

.history-item-delete i {
    font-size: 0.75rem;
    line-height: 1;
}

/* Delete Tooltip */
.delete-tooltip {
    position: absolute;
    bottom: 100%;
    right: 0;
    margin-bottom: 0.5rem;
    padding: 0.375rem 0.625rem;
    background: #1e293b;
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    transform: translateY(4px);
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    /* Performance optimizations */
    will-change: opacity, transform;
    contain: layout style;
}

.delete-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    right: 0.75rem;
    border: 4px solid transparent;
    border-top-color: #1e293b;
    margin-top: -1px;
}

.history-item-delete:hover .delete-tooltip {
    opacity: 1;
    transform: translateY(0);
    pointer-events: none;
}

.chat-container::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb {
    background: #F48FB1;
    border-radius: 3px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: #E91E63;
}

/* Educational Messages */
.message {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.3s ease;
    /* Ultra-optimized hardware acceleration */
    will-change: transform, opacity;
    transform: translateZ(0);
    contain: layout style;
    /* Memory optimization */
    backface-visibility: hidden;
}

/* Ultra-optimized animation with hardware acceleration */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 10px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

.user-message {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.user-message .message-avatar {
    background: #E91E63;
    color: white;
}

.bot-message .message-avatar {
    background: #FFE4EC;
    color: #E91E63;
    border: 2px solid #F48FB1;
}

/* Bot avatar logo image */
.bot-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.message-content {
    flex: 1;
    max-width: calc(100% - 48px);
}

.user-message .message-content {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.message-text {
    background: white;
    padding: 1.5rem 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.1);
    word-wrap: break-word;
    white-space: pre-wrap;
    font-size: 1rem;
    line-height: 1.3;
    /* Educational typography for better readability */
    font-weight: 400;
    letter-spacing: 0.01em;
    font-family: 'Inter', 'Open Sans', sans-serif;
    border: 1px solid #F48FB1;
}

.user-message .message-text {
    background: #ffffff;
    color: #212121;
    border-bottom-right-radius: 6px;
    border: 1px solid #F48FB1;
}

.bot-message .message-text {
    border-bottom-left-radius: 6px;
    background: #FFE4EC;
    color: #212121;
    border: 1px solid #F48FB1;
}

.message-text p {
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.message-text p:last-child {
    margin-bottom: 0;
}

/* Optimized welcome message styling for educational clarity */
.bot-message .message-text h3 {
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
    font-size: 1.1rem;
}

.bot-message .message-text p {
    margin: 0 0 0.4rem 0;
    line-height: 1.4;
    font-size: 0.95rem;
}

.bot-message .message-text ul {
    margin: 0.4rem 0;
    padding-left: 1.5rem;
}

.bot-message .message-text li {
    margin: 0.2rem 0;
    line-height: 1.4;
    font-size: 0.9rem;
}

/* Enhanced typography for better readability */
.message-text h1, .message-text h2, .message-text h3, .message-text h4, .message-text h5, .message-text h6 {
    font-weight: 600;
    margin: 0.75rem 0 0.5rem 0;
    line-height: 1.2;
    color: #212121;
}

.message-text h1 { font-size: 1.5rem; }
.message-text h2 { font-size: 1.3rem; }
.message-text h3 { font-size: 1.2rem; }
.message-text h4 { font-size: 1.1rem; }
.message-text h5 { font-size: 1rem; }
.message-text h6 { font-size: 0.95rem; }

.message-text h1:first-child, .message-text h2:first-child, .message-text h3:first-child, 
.message-text h4:first-child, .message-text h5:first-child, .message-text h6:first-child {
    margin-top: 0;
}

.message-text strong, .message-text b {
    font-weight: 600;
    color: #212121;
}

.message-text em, .message-text i {
    font-style: italic;
    color: #212121;
}

.message-text code {
    background: #FFE4EC;
    color: #E91E63;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Fira Code', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    font-size: 0.9em;
    font-weight: 500;
}

.message-text pre {
    background: #1f2937;
    color: #f9fafb;
    padding: 0.75rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.5rem 0;
    font-family: 'Fira Code', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.3;
    border: 1px solid #374151;
}

.message-text pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
}

.message-text ul, .message-text ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.message-text li {
    margin: 0.25rem 0;
    line-height: 1.3;
}

.message-text blockquote {
    border-left: 4px solid #E91E63;
    padding-left: 1rem;
    margin: 0.5rem 0;
    color: #212121;
    font-style: italic;
    background: #FFE4EC;
    padding: 0.75rem;
    border-radius: 0 8px 8px 0;
}

.message-text table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

.message-text th, .message-text td {
    border: 1px solid #F48FB1;
    padding: 0.75rem;
    text-align: left;
}

.message-text th {
    background: #FFE4EC;
    font-weight: 600;
    color: #212121;
}

.message-text hr {
    border: none;
    height: 1px;
    background: #F48FB1;
    margin: 0.75rem 0;
}

.message-time {
    font-size: 0.75rem;
    color: #212121;
    opacity: 0.6;
    margin-top: 0.5rem;
}

.user-message .message-time {
    text-align: right;
}

/* Single-line Sources Display */
.sources-line {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid #F48FB1;
    font-size: 0.75rem;
    color: #212121;
    opacity: 0.7;
    line-height: 1.4;
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 4px !important;
    align-items: center !important;
    flex-direction: row !important;
}

.sources-line::before {
    content: "Sources: ";
    color: #212121;
    opacity: 0.7;
    font-weight: 500;
    margin-right: 4px;
    flex-shrink: 0;
}

.source-item-inline {
    display: inline-flex !important;
    align-items: center !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    margin-right: 4px !important;
}

.source-item-inline:not(:last-child)::after {
    content: " • ";
    color: #9ca3af;
    margin: 0 2px;
}

.source-title-inline {
    font-weight: 400;
    color: #212121;
    opacity: 0.7;
    display: inline !important;
}

.source-relevance {
    color: #212121;
    opacity: 0.6;
    font-weight: 400;
    margin-left: 2px !important;
    display: inline !important;
}

.sources-more {
    color: #212121;
    opacity: 0.6;
    font-style: italic;
    flex-shrink: 0 !important;
    display: inline !important;
    margin-left: 4px !important;
}

/* Educational Input Container */
.input-container {
    background: white;
    border-top: 2px solid #F48FB1;
    padding: 1rem;
    position: sticky;
    bottom: 0;
    /* Performance optimizations */
    will-change: transform;
    transform: translateZ(0);
    contain: layout style;
}

/* Educational Input Wrapper */
.input-wrapper {
    max-width: 100%;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    background: #FFF6F8;
    border: 2px solid #F48FB1;
    border-radius: 12px;
    padding: 0.75rem;
    transition: all 0.2s ease;
    /* Performance optimizations */
    will-change: border-color, box-shadow;
    transform: translateZ(0);
    contain: layout style;
}

.input-wrapper:focus-within {
    border-color: #E91E63;
    box-shadow: 0 0 0 4px rgba(233, 30, 99, 0.1);
}

.input-wrapper:hover {
    border-color: #F48FB1;
}

#messageInput {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    outline: none;
    font-size: 0.9rem;
    line-height: 1.4;
    min-height: 20px;
    max-height: 100px;
    font-family: inherit;
    color: #343541;
}

#messageInput::placeholder {
    color: #9ca3af;
}

/* Educational Send Button */
.send-button {
    background: #E91E63;
    color: white;
    border: none;
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(233, 30, 99, 0.2);
    /* Performance optimizations */
    will-change: transform, background-color;
    transform: translateZ(0);
    contain: layout style;
}

.send-button:hover:not(:disabled) {
    background: #C2185B;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.3);
}

.send-button:disabled {
    background: #F48FB1;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.input-footer {
    max-width: 100%;
    margin: 1rem auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: #212121;
    opacity: 0.7;
    font-family: 'Inter', sans-serif;
}

.char-count {
    font-weight: 600;
    color: #212121;
}


/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.show {
    display: flex;
}

.loading-spinner {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Ultra-optimized Spinner with hardware acceleration */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #FFE4EC;
    border-top: 3px solid #E91E63;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
    /* Performance optimizations */
    will-change: transform;
    transform: translateZ(0);
    contain: layout style;
}

/* Ultra-optimized spin animation with hardware acceleration */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner p {
    color: #212121;
    font-weight: 500;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #F48FB1;
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #212121;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: #212121;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.modal-close:hover {
    background: #FFE4EC;
}

.modal-body {
    padding: 1.5rem;
}

.modal-body p {
    color: #212121;
    line-height: 1.6;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid #F48FB1;
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Educational Mobile Responsiveness */
@media (max-width: 1024px) {
    .main-content {
        margin-left: 0;
    }
    
    .chat-history-sidebar {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 320px;
        min-width: 320px;
        z-index: 999;
        box-shadow: -4px 0 12px rgba(0, 0, 0, 0.1);
        /* Reset desktop styles for mobile */
        opacity: 1;
        border-left: 2px solid #e2e8f0;
        overflow: hidden;
    }
    
    /* Mobile: Use transform to slide off-screen, but keep width for layout */
    .chat-history-sidebar.hidden {
        transform: translateX(100%);
        /* Keep width on mobile so fixed positioning works */
        width: 320px;
        min-width: 320px;
    }
    
    /* Show sidebar content on mobile even when hidden (for smooth animation) */
    .chat-history-sidebar.hidden .history-content {
        display: flex;
    }
}

@media (max-width: 768px) {
    .chat-history-sidebar {
        width: 100%;
        max-width: 320px;
    }
    
    /* On mobile, sidebar doesn't affect layout when hidden (it's fixed) */
    .chat-main {
        width: 100%;
        flex: 1;
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 0.5rem 1rem;
    }
    
    
    .logo-text h1 {
        font-size: 1.1rem;
    }
    
    .institution-name {
        font-size: 0.65rem;
    }
    
    .chat-container {
        padding: 1.5rem 1rem;
    }
    
    .input-container {
        padding: 0.75rem 1rem;
    }
    
    .message {
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }
    
    .message-avatar {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .message-text {
        padding: 1.25rem 1.5rem;
        font-size: 0.95rem;
        line-height: 1.3;
    }
    
    .message-text h1 { font-size: 1.4rem; }
    .message-text h2 { font-size: 1.3rem; }
    .message-text h3 { font-size: 1.2rem; }
    .message-text h4 { font-size: 1.1rem; }
    .message-text h5 { font-size: 1rem; }
    .message-text h6 { font-size: 0.95rem; }
    
    .sources-line {
        font-size: 0.75rem;
        margin-top: 0.5rem;
        padding-top: 0.5rem;
        gap: 3px;
    }
    
    .input-footer {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
}

@media (max-width: 480px) {
    .header-actions {
        display: none;
    }
    
    
    .logo h1 {
        font-size: 1rem;
    }
    
    .chat-container {
        padding: 0.75rem;
    }
    
    .input-container {
        padding: 0.5rem;
    }
    
    .message {
        margin-bottom: 1rem;
        gap: 0.5rem;
    }
    
    .message-text {
        padding: 0.875rem 1rem;
        font-size: 0.85rem;
        line-height: 1.2;
    }
    
    .message-text h1 { font-size: 1.2rem; }
    .message-text h2 { font-size: 1.1rem; }
    .message-text h3 { font-size: 1rem; }
    .message-text h4 { font-size: 0.95rem; }
    .message-text h5 { font-size: 0.9rem; }
    .message-text h6 { font-size: 0.85rem; }
    
    .sources-line {
        font-size: 0.65rem;
        margin-top: 0.375rem;
        padding-top: 0.375rem;
        gap: 2px;
    }
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #9ca3af;
    font-style: italic;
    font-size: 0.875rem;
}

.typing-dots {
    display: flex;
    gap: 2px;
}

/* Ultra-optimized Typing Dot with hardware acceleration */
.typing-dot {
    width: 4px;
    height: 4px;
    background: #9ca3af;
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
    /* Performance optimizations */
    will-change: transform, opacity;
    transform: translateZ(0);
    contain: layout style;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

/* Ultra-optimized typing animation with hardware acceleration */
@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Educational section styling for better structure */
.edu-section {
    color: #E91E63;
    font-weight: 600;
    font-size: 1rem;
    margin: 1rem 0 0.5rem 0;
    padding: 0.5rem 0;
    border-bottom: 2px solid #F48FB1;
    font-family: 'Inter', sans-serif;
}

.edu-section:first-child {
    margin-top: 0;
}

/* Responsive welcome message typography */
@media (max-width: 768px) {
    .bot-message .message-text h3 {
        font-size: 1rem;
        line-height: 1.3;
    }
    
    .bot-message .message-text p {
        font-size: 0.9rem;
        line-height: 1.3;
    }
    
    .bot-message .message-text li {
        font-size: 0.85rem;
        line-height: 1.3;
    }
    
    .edu-section {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .bot-message .message-text h3 {
        font-size: 0.95rem;
        line-height: 1.2;
    }
    
    .bot-message .message-text p {
        font-size: 0.85rem;
        line-height: 1.2;
    }
    
    .bot-message .message-text li {
        font-size: 0.8rem;
        line-height: 1.2;
    }
    
    .edu-section {
        font-size: 0.9rem;
    }
}