/* Modern UI Theme with Calming Colors */
:root {
    /* Primary color scheme - Calming blues and purples */
    --primary-light: #8B9FFF;
    --primary: #637AEE;
    --primary-dark: #4C62D6;
    --secondary-light: #B6C2FF;
    --secondary: #A3B1FF;
    --secondary-dark: #8A99FF;
    --accent-primary: #6A7EE8;
    --accent-secondary: #A4B4FF;
    
    /* Gradients */
    --accent-gradient: linear-gradient(135deg, #637AEE, #8B9FFF);
    --accent-gradient-hover: linear-gradient(135deg, #7289FF, #99ACFF);
    --bg-gradient: linear-gradient(180deg, #f5f7ff, #eef1ff);
    
    /* Light theme colors */
    --bg-primary-light: #F8F9FF;
    --bg-secondary-light: #EFF2FF;
    --bg-tertiary-light: #E6EBFF;
    --text-primary-light: #3A3E59;
    --text-secondary-light: #6C7593;
    --border-color-light: rgba(99, 122, 238, 0.1);
    --bubble-user-light: #637AEE;
    --bubble-ai-light: #F0F4FF;
    --shadow-color-light: rgba(99, 122, 238, 0.1);
    
    /* Dark theme colors */
    --bg-primary-dark: #1A1B25;
    --bg-secondary-dark: #222331;
    --bg-tertiary-dark: #2A2C3D;
    --text-primary-dark: #E2E8FF;
    --text-secondary-dark: #B6C0E0;
    --border-color-dark: rgba(99, 122, 238, 0.2);
    --bubble-user-dark: #637AEE;
    --bubble-ai-dark: #2A2C3D;
    --shadow-color-dark: rgba(0, 0, 0, 0.2);
    
    /* Default to dark theme */
    --bg-primary: var(--bg-primary-dark);
    --bg-secondary: var(--bg-secondary-dark);
    --bg-tertiary: var(--bg-tertiary-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --border-color: var(--border-color-dark);
    --bubble-user: var(--bubble-user-dark);
    --bubble-ai: var(--bubble-ai-dark);
    --shadow-color: var(--shadow-color-dark);
    
    /* Visual feedback colors */
    --success: #5CDB95;
    --warning: #FFC857;
    --danger: #FF5A5A;
    --info: #64C7FF;
}

/* Apply theme */
[data-theme="light"] {
    --bg-primary: var(--bg-primary-light);
    --bg-secondary: var(--bg-secondary-light);
    --bg-tertiary: var(--bg-tertiary-light);
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --border-color: var(--border-color-light);
    --bubble-user: var(--bubble-user-light);
    --bubble-ai: var(--bubble-ai-light);
    --shadow-color: var(--shadow-color-light);
}

/* Base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body, html {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100%;
    width: 100%;
    overflow: hidden;
    overscroll-behavior: none;
    position: fixed;
}

/* Main container layout */
.app-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    background-color: var(--bg-primary);
    position: relative;
}

/* Sidebar styling - modern and sleek */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    height: 100%;
    overflow-y: auto;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 10;
    box-shadow: 5px 0 20px rgba(0, 0, 0, 0.05);
}

.profile-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    animation: fadeIn 1s ease;
}

.profile-image {
    position: relative;
    width: 120px;
    height: 120px;
    border-radius: 30px;
    background: var(--accent-gradient);
    padding: 3px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(99, 122, 238, 0.3);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.profile-image:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: 0 15px 35px rgba(99, 122, 238, 0.4);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 28px;
}

.profile-status {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--success);
    border: 3px solid var(--bg-secondary);
    bottom: 5px;
    right: 5px;
    animation: pulse 2s infinite;
}

.profile-name {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: slideUp 0.7s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.profile-title {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
    animation: slideUp 0.7s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation-delay: 0.1s;
    opacity: 0;
    animation-fill-mode: forwards;
}

/* Chat section layout and styling */
.chat-section {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: relative;
    z-index: 2;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.header-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-avatar {
    width: 48px;
    height: 48px;
    border-radius: 15px;
    background: var(--accent-gradient);
    padding: 2px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.2);
    transition: all 0.3s ease;
}

.header-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 13px;
}

.header-info {
    display: flex;
    flex-direction: column;
}

.header-name {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    display: inline-block;
    animation: pulse 2s infinite;
}

/* Menu styling */
.menu-dropdown {
    position: absolute;
    top: 80px;
    right: 25px;
    width: 220px;
    background: var(--bg-tertiary);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow-color);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.menu-dropdown.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 1.2rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.menu-item:last-child {
    border-bottom: none;
}

.menu-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-gradient);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.menu-item:hover {
    background: rgba(99, 122, 238, 0.08);
    padding-left: 1.5rem;
}

.menu-item:hover::before {
    transform: translateX(0);
}

.menu-item:active {
    transform: scale(0.98);
}

.menu-item i {
    font-size: 1.1rem;
    color: var(--accent-primary);
    transition: transform 0.3s ease;
}

.menu-item:hover i {
    transform: translateX(3px);
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    scroll-behavior: smooth;
    min-height: 100px;
    position: relative;
    background-attachment: fixed;
    background-image: radial-gradient(var(--bg-tertiary) 1px, transparent 1px);
    background-size: 25px 25px;
    padding-bottom: 1.5rem;
}

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

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

.messages-container::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 10px;
    opacity: 0.5;
}

.messages-container::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* Enhanced Input Area - Redesigned */
.input-area {
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 5;
    box-shadow: 0 -10px 20px rgba(0, 0, 0, 0.05);
}

.input-container {
    background: var(--bg-tertiary);
    border-radius: 24px;
    padding: 0.8rem 1rem 0.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    max-width: 100%;
    transform: translateY(0);
}

.input-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 122, 238, 0.05), transparent);
    transform: translateX(-100%);
    animation: shimmer 5s infinite;
    pointer-events: none;
}

.input-container:focus-within {
    box-shadow: 0 8px 30px rgba(99, 122, 238, 0.15);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
}

.input-wrapper {
    width: 100%;
    background: transparent;
    min-width: 0;
    overflow-x: hidden;
}

textarea {
    width: 100%;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1.05rem;
    resize: none;
    outline: none;
    max-height: 120px;
    min-height: 24px;
    padding: 0.3rem 0 0.1rem;
    line-height: 1.5;
    transition: all 0.3s;
    overflow-x: hidden;
    font-family: inherit;
}

textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

textarea:focus::placeholder {
    opacity: 0.4;
}

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding-top: 0.1rem;
}

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

.input-image-button,
.input-send-button {
    width: 45px;
    height: 45px;
    border-radius: 14px;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    position: relative;
}

.input-image-button::after,
.input-send-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: var(--accent-gradient);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 0;
}

.input-image-button:hover::after,
.input-send-button:hover::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.1;
    border-radius: 14px;
}

.input-image-button:hover,
.input-send-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(99, 122, 238, 0.15);
}

.input-image-button:active,
.input-send-button:active {
    transform: translateY(-2px) scale(0.97);
    box-shadow: 0 4px 10px rgba(99, 122, 238, 0.1);
}

.input-image-button i,
.input-send-button i {
    position: relative;
    z-index: 1;
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.input-image-button:hover i {
    transform: scale(1.1);
}

.input-send-button {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.25);
}

.input-send-button:hover {
    box-shadow: 0 8px 25px rgba(99, 122, 238, 0.35);
}

.input-send-button i {
    transition: transform 0.3s ease;
}

.input-send-button:hover i {
    transform: translateX(3px);
}

/* Thinking Toggle Button - Modern & Interactive */
.thinking-toggle-button {
    display: flex !important;
    align-items: center;
    gap: 0.4rem;
    height: 45px;
    padding: 0 1rem !important;
    border-radius: 14px;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    width: auto !important;
}

.thinking-toggle-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: var(--accent-gradient);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 0;
}

.thinking-toggle-button:hover::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.1;
    border-radius: 14px;
}

.thinking-toggle-button.active {
    background: rgba(99, 122, 238, 0.15);
    color: var(--accent-primary);
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.2);
}

.thinking-toggle-button.active i {
    animation: pulse 2s infinite;
    color: var(--accent-primary);
}

.thinking-toggle-button i {
    position: relative;
    z-index: 1;
    font-size: 1rem;
    transition: transform 0.3s ease, color 0.3s ease;
}

.thinking-toggle-button span {
    position: relative;
    z-index: 1;
    display: inline !important;
}

.thinking-toggle-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(99, 122, 238, 0.15);
}

.thinking-toggle-button:active {
    transform: translateY(-2px) scale(0.97);
    box-shadow: 0 4px 10px rgba(99, 122, 238, 0.1);
}

/* Thinking status indicator */
.thinking-status {
    position: absolute;
    top: 5px;
    right: 5px;
    padding: 0.4rem 0.8rem;
    border-radius: 12px;
    background: var(--bg-tertiary);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 100;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.thinking-status.active {
    opacity: 1;
    transform: translateY(0);
}

.thinking-status i {
    color: var(--accent-primary);
}

.thinking-status.enabled i {
    animation: pulse 2s infinite;
}

/* Message Styles - Modern & Clean */
.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: fadeIn 0.5s ease-out;
    position: relative;
}

.message.user {
    align-self: flex-end;
}

.message-content {
    border-radius: 24px;
    padding: 0.2rem;
    position: relative;
    transition: all 0.3s ease;
    max-width: 100%;
}

.message-content:hover {
    transform: translateY(-2px);
}

.user .message-content {
    background: var(--accent-gradient);
    color: white;
    border-bottom-right-radius: 5px;
    align-self: flex-end;
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.2);
}

.ai .message-content {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-bottom-left-radius: 5px;
    align-self: flex-start;
    box-shadow: 0 5px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.message-content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem 1.2rem;
    border-radius: inherit;
}

.message-image {
    max-width: 250px;
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.message-image:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.user .message-image {
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.ai .message-image {
    border: 2px solid var(--border-color);
}

.message-text {
    font-size: 1rem;
    line-height: 1.5;
    font-weight: 400;
    overflow-wrap: break-word;
    word-break: break-word;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.user .message-text {
    color: white;
}

.ai .message-text code {
    background: rgba(0, 0, 0, 0.2);
    padding: 2px 5px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
}

/* Loading Animation - More Modern */
.loading-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 24px;
    border-bottom-left-radius: 5px;
    margin-bottom: 1rem;
    width: fit-content;
    animation: fadeIn 0.3s ease-out;
    box-shadow: 0 5px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.loading-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid rgba(99, 122, 238, 0.1);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spinner 1s linear infinite;
}

.loading-text {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* Image Preview Styles - Enhanced */
.preview-container {
    padding: 1.2rem;
    background: var(--bg-tertiary);
    border-radius: 18px;
    margin: 1rem;
    margin-bottom: 0;
    display: none;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 5px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.preview-container.active {
    display: block;
}

.preview-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem;
    background: var(--bg-secondary);
    border-radius: 14px;
    border: 1px solid var(--border-color);
}

.preview-image {
    width: 100px;
    height: 100px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid var(--border-color);
}

.preview-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.preview-info {
    flex: 1;
}

.preview-name {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.preview-size {
    color: var(--text-secondary);
    font-size: 0.85rem;
    opacity: 0.8;
}

.preview-remove {
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 3px 10px rgba(229, 62, 62, 0.3);
}

.preview-remove:hover {
    transform: scale(1.1) rotate(90deg);
    background: #C53030;
    box-shadow: 0 5px 15px rgba(229, 62, 62, 0.4);
}

/* Thinking Message Styles - Improved */
.message.thinking {
    max-width: 85%;
    margin-left: 25px;
    opacity: 0.9;
    animation: thinkingPulse 2s infinite alternate;
}

.thinking .message-content {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-bottom-left-radius: 5px;
    border-left: 3px solid var(--accent-primary);
    font-style: italic;
    padding: 1rem 1.2rem;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.thinking-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--accent-primary);
}

.thinking-indicator i {
    font-size: 0.85rem;
    animation: pulse 1.5s infinite;
}

[data-theme="light"] .thinking .message-content {
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent-primary);
}

[data-theme="light"] .thinking .message-text {
    color: var(--text-secondary);
}

/* Image Placeholder for messages that once had images */
.image-placeholder {
    background: var(--bg-secondary);
    border: 1px dashed var(--accent-primary);
    border-radius: 14px;
    padding: 12px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
    transition: all 0.3s ease;
}

.image-placeholder:hover {
    background: rgba(99, 122, 238, 0.05);
    transform: translateY(-2px);
}

.image-placeholder i {
    color: var(--accent-primary);
    font-size: 1.2rem;
}

.user .image-placeholder {
    background: rgba(99, 122, 238, 0.1);
    border: 1px dashed rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.8);
}

.user .image-placeholder i {
    color: white;
}

/* Storage indicator - Subtle and modern */
.storage-indicator {
    position: absolute;
    bottom: 10px;
    left: 10px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.7;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 10;
    pointer-events: none;
    padding: 0.4rem 0.8rem;
    background: var(--bg-tertiary);
    border-radius: 12px;
    box-shadow: 0 3px 10px var(--shadow-color);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--border-color);
    transform: translateY(0);
}

.storage-indicator i {
    font-size: 0.9rem;
    color: var(--accent-primary);
}

.storage-indicator.saving i {
    animation: pulse 1s infinite;
}

.storage-indicator:hover {
    opacity: 0.9;
    transform: translateY(-3px);
}

/* Welcome Popup - Modern and Interactive */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 1rem;
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background: var(--bg-tertiary);
    max-width: 400px;
    width: 100%;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px var(--shadow-color);
    transform: translateY(30px) scale(0.95);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--border-color);
    will-change: transform, opacity;
    backface-visibility: hidden;
    z-index: 10001;
    pointer-events: auto;
}

.popup-overlay.active .popup-content {
    transform: translateY(0) scale(1);
    opacity: 1;
    box-shadow: 0 25px 50px var(--shadow-color);
}

.popup-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.popup-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transform: translateX(-10px);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: 0.1s;
}

.popup-overlay.active .popup-header h3 {
    transform: translateX(0);
    opacity: 1;
}

.popup-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.popup-close:hover {
    background: rgba(99, 122, 238, 0.2);
    transform: rotate(90deg);
}

.popup-close i {
    font-size: 1.1rem;
}

.popup-body {
    padding: 1.2rem;
}

.popup-feature {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1.2rem;
    align-items: flex-start;
    transform: translateX(-20px);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform, opacity;
}

.popup-overlay.active .popup-feature:nth-child(1) {
    transition-delay: 0.2s;
    transform: translateX(0);
    opacity: 1;
}

.popup-overlay.active .popup-feature:nth-child(2) {
    transition-delay: 0.3s;
    transform: translateX(0);
    opacity: 1;
}

.popup-overlay.active .popup-feature:nth-child(3) {
    transition-delay: 0.4s;
    transform: translateX(0);
    opacity: 1;
}

.popup-overlay.active .popup-feature:nth-child(4) {
    transition-delay: 0.5s;
    transform: translateX(0);
    opacity: 1;
}

.popup-feature:last-child {
    margin-bottom: 0;
}

.popup-icon {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: var(--accent-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.25);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    will-change: transform;
    position: relative;
    overflow: hidden;
}

.popup-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0) 100%);
    top: 0;
    left: -100%;
    transition: all 0.5s ease;
}

.popup-feature:hover .popup-icon::after {
    left: 100%;
}

.popup-feature:hover .popup-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 20px rgba(99, 122, 238, 0.35);
}

.popup-text h4 {
    font-size: 1rem;
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    font-weight: 600;
}

.popup-text p {
    font-size: 0.9rem;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

.popup-button {
    position: relative;
    z-index: 9999;
    display: block;
    width: calc(100% - 2.4rem);
    margin: 0 1.2rem 1.2rem;
    padding: 1rem;
    border-radius: 14px;
    background: var(--accent-gradient);
    color: white;
    font-weight: 600;
    text-align: center;
    border: none;
    cursor: pointer !important;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    font-size: 1rem;
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.3);
    transform: translateY(20px);
    opacity: 0;
    will-change: transform, opacity, box-shadow;
    pointer-events: auto !important;
    overflow: hidden;
}

.popup-button::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0) 100%);
    top: 0;
    left: -100%;
    transition: all 0.5s ease;
}

.popup-overlay.active .popup-button {
    transform: translateY(0);
    opacity: 1;
    transition-delay: 0.5s;
    pointer-events: auto !important;
}

.popup-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(99, 122, 238, 0.5);
}

.popup-button:hover::after {
    left: 100%;
}

.popup-button:active {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(99, 122, 238, 0.4);
}

/* Customization Popup - More modern */
.customization-popup .popup-content {
    max-width: 450px;
}

.customize-section {
    margin-bottom: 1.5rem;
}

.customize-section label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.customize-section input[type="text"],
.customize-section textarea {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 0.9rem 1rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
    transition: all 0.3s ease;
    resize: none;
    box-shadow: 0 3px 8px var(--shadow-color);
}

.customize-section textarea {
    min-height: 100px;
}

.customize-section input[type="text"]:focus,
.customize-section textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(99, 122, 238, 0.2);
    outline: none;
    transform: translateY(-2px);
}

.suggestion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.suggestion-chip {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.suggestion-chip::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var (--accent-gradient);
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.suggestion-chip:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.2);
    border-color: transparent;
}

.suggestion-chip:hover::after {
    opacity: 1;
}

.popup-actions {
    display: flex;
    justify-content: space-between;
    padding: 0 1.2rem 1.2rem;
    gap: 1rem;
}

.popup-button.primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 5px 15px rgba(99, 122, 238, 0.3);
    flex: 2;
}

.popup-button.secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px var(--shadow-color);
    flex: 1;
}

.popup-button.secondary:hover {
    background: rgba(99, 122, 238, 0.1);
    border-color: var(--accent-primary);
}

/* Notification Styles - More modern and interactive */
.notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 10px 25px var(--shadow-color);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 10000;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.notification.active {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.notification i {
    color: var(--accent-primary);
    font-size: 1.2rem;
    animation: pulse 2s infinite;
}

.notification span {
    color: var(--text-primary);
    font-weight: 500;
}

/* Enhanced typing animation */
.typing-animation {
    min-height: 1.2em;
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background-color: var(--accent-primary);
    vertical-align: middle;
    margin-left: 1px;
    animation: blink 0.7s infinite;
    position: relative;
    top: 2px;
}

/* Make AI messages with typing animation look more natural */
.message.ai .message-content {
    min-width: 40px;
}

/* Improved Hamburger Button Styles */
.hamburger-menu-button {
    padding: 10px;
    display: inline-block;
    cursor: pointer;
    transition-property: opacity, filter;
    transition-duration: 0.15s;
    transition-timing-function: linear;
    background-color: transparent;
    border: 0;
    margin: 0;
    overflow: visible;
    position: relative;
    z-index: 1001;
    border-radius: 12px;
}

.hamburger-menu-button:hover {
    background-color: rgba(99, 122, 238, 0.1);
}

.hamburger-box {
    width: 24px;
    height: 20px;
    display: inline-block;
    position: relative;
}

.hamburger-inner {
    display: block;
    top: 50%;
    margin-top: -2px;
}

.hamburger-inner, 
.hamburger-inner::before, 
.hamburger-inner::after {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 4px;
    position: absolute;
    transition-property: transform;
    transition-duration: 0.15s;
    transition-timing-function: ease;
}

.hamburger-inner::before, 
.hamburger-inner::after {
    content: "";
    display: block;
}

.hamburger-inner::before {
    top: -8px;
}

.hamburger-inner::after {
    bottom: -8px;
}

/* Hamburger Animation */
.hamburger-menu-button.is-active .hamburger-inner {
    transform: rotate(45deg);
    background-color: var(--accent-primary);
}

.hamburger-menu-button.is-active .hamburger-inner::before {
    top: 0;
    opacity: 0;
}

.hamburger-menu-button.is-active .hamburger-inner::after {
    bottom: 0;
    transform: rotate(-90deg);
    background-color: var(--accent-primary);
}

.hamburger-menu-button.is-active:hover {
    background-color: rgba(99, 122, 238, 0.15);
}

/* Make sure menu dropdown appears properly with the button */
.menu-dropdown {
    /* ...existing menu-dropdown styles... */
    z-index: 1000;
}

/* Enhanced animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(20px); 
    }
    to { 
        opacity: 1;
        transform: translateY(0); 
    }
}

@keyframes slideDown {
    from { 
        opacity: 0;
        transform: translateY(-20px); 
    }
    to { 
        opacity: 1;
        transform: translateY(0); 
    }
}

@keyframes pulse {
    0% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
    100% { opacity: 0.6; transform: scale(1); }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes spinner {
    to { transform: rotate(360deg); }
}

@keyframes thinkingPulse {
    0% { opacity: 0.85; }
    100% { opacity: 1; }
}

@keyframes blink {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
    100% { transform: translateY(0px); }
}

@keyframes wave {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(10deg); }
    50% { transform: rotate(0deg); }
    75% { transform: rotate(-10deg); }
    100% { transform: rotate(0deg); }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 250px 1fr;
    }

    .profile-image {
        width: 100px;
        height: 100px;
    }
    
    .message {
        max-width: 85%;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 15px;
    }

    .app-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: none;
        position: fixed;
        width: 270px;
        z-index: 1000;
        height: 100%;
    }

    .header-avatar {
        width: 42px;
        height: 42px;
        border-radius: 12px;
    }

    .chat-header {
        padding: 1rem;
    }
    
    .header-name {
        font-size: 1rem;
    }
    
    .header-status {
        font-size: 0.8rem;
    }

    .message {
        max-width: 90%;
    }

    .menu-dropdown {
        top: 70px;
        right: 15px;
    }

    .messages-container {
        padding: 1.2rem;
    }

    .input-area {
        padding: 1.2rem;
    }

    .input-container {
        padding: 0.7rem 0.8rem 0.5rem;
        gap: 0.25rem;
    }

    .input-image-button,
    .input-send-button,
    .thinking-toggle-button {
        width: 40px;
        height: 40px;
        border-radius: 12px;
    }
    
    .thinking-toggle-button {
        height: 40px;
        padding: 0 0.8rem !important;
        font-size: 0.85rem;
        border-radius: 12px;
    }
    
    .thinking-toggle-button i {
        font-size: 0.9rem;
    }
    
    textarea {
        font-size: 1rem;
        padding: 0.4rem;
    }
    
    .message-content {
        padding: 0.2rem;
    }
    
    .message-content-wrapper {
        padding: 0.8rem 1rem;
    }
    
    .menu-button {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: var(--bg-tertiary);
        color: var(--accent-primary);
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
    }
    
    .menu-dropdown {
        top: 70px;
        right: 15px;
    }

    .hamburger-menu-button {
        padding: 8px;
    }
    
    .hamburger-box {
        width: 20px;
        height: 16px;
    }
    
    .hamburger-inner, 
    .hamburger-inner::before, 
    .hamburger-inner::after {
        width: 20px;
    }
    
    .hamburger-inner::before {
        top: -6px;
    }
    
    .hamburger-inner::after {
        bottom: -6px;
    }
}

@media (max-width: 480px) {
    .message {
        max-width: 95%;
    }
    
    .profile-image {
        width: 90px;
        height: 90px;
        border-radius: 25px;
    }
    
    .header-avatar {
        width: 38px;
        height: 38px;
        border-radius: 10px;
    }
    
    .menu-button {
        width: 38px;
        height: 38px;
        border-radius: 10px;
    }
    
    .input-image-button,
    .input-send-button,
    .thinking-toggle-button {
        width: 36px;
        height: 36px;
        border-radius: 10px;
    }
    
    .message-image {
        max-width: 220px;
    }
    
    .preview-container {
        padding: 0.8rem;
    }
    
    .preview-image {
        width: 80px;
        height: 80px;
    }
    
    .message-content-wrapper {
        padding: 0.8rem 1rem;
    }
    
    .thinking-indicator {
        font-size: 0.85rem;
    }
    
    .messages-container {
        gap: 1rem;
        padding: 1rem;
    }
    
    .chat-header {
        padding: 0.8rem;
    }
    
    .app-container {
        display: flex;
        flex-direction: column;
        height: 100vh;
        height: calc(var(--real-vh, 1vh) * 100);
        width: 100%;
        overflow: hidden;
        padding-top: env(safe-area-inset-top, 0);
    }
    
    .chat-section {
        flex: 1;
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }
    
    .input-container {
        padding: 0.6rem 0.7rem 0.4rem;
        gap: 0.2rem;
    }
    
    .input-left-actions {
        gap: 0.3rem;
    }

    .thinking-toggle-button {
        height: 36px;
        padding: 0 0.6rem !important;
        font-size: 0.78rem;
        border-radius: 10px;
        min-width: 90px;
    }
    
    .thinking-toggle-button i {
        font-size: 0.85rem;
    }
    
    .thinking-status {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }
    
    .input-area {
        width: 100%;
        flex-shrink: 0;
        padding: 0.8rem;
        padding-bottom: calc(0.8rem + env(safe-area-inset-bottom, 0));
    }

    .input-actions {
        padding-bottom: env(safe-area-inset-bottom, 0);
    }
    
    .popup-content {
        max-width: 100%;
        margin: 0 1rem;
    }
            
    .popup-header h3 {
        font-size: 1.3rem;
    }
    
    .popup-feature {
        gap: 0.8rem;
    }
    
    .popup-icon {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }
    
    .popup-text h4 {
        font-size: 1rem;
    }
    
    .popup-text p {
        font-size: 0.9rem;
    }

    .hamburger-menu-button {
        padding: 6px;
    }
}

/* PDF Library Section in Sidebar */
.pdf-library-section {
    margin-top: 2rem;
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 1.2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
    animation: fadeIn 1s ease;
    transition: all 0.3s ease;
}

.pdf-library-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pdf-library-title::before {
    content: '\f1c1';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.pdf-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.pdf-list::-webkit-scrollbar {
    width: 4px;
}

.pdf-list::-webkit-scrollbar-track {
    background: transparent;
}

.pdf-list::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 10px;
    opacity: 0.5;
}

.pdf-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    position: relative;
}

.pdf-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 122, 238, 0.15);
    border-color: var(--accent-primary);
}

.pdf-item-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    flex-shrink: 0;
}

.pdf-item-info {
    flex: 1;
    min-width: 0;
}

.pdf-item-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.2rem;
}

.pdf-item-size {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.pdf-item-actions {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.pdf-item:hover .pdf-item-actions {
    opacity: 1;
}

.pdf-action-button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.3rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pdf-action-button:hover {
    color: var(--text-primary);
    background: rgba(99, 122, 238, 0.1);
}

.empty-pdf-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    text-align: center;
}

.empty-pdf-list i {
    font-size: 2rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.empty-pdf-list p {
    font-size: 0.9rem;
}

/* PDF Preview Container */
.pdf-preview-container {
    padding: 1.2rem;
    background: var(--bg-tertiary);
    border-radius: 18px;
    margin: 1rem;
    margin-bottom: 0;
    display: none;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 5px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.pdf-preview-container.active {
    display: block;
}

.pdf-preview-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem;
    background: var(--bg-secondary);
    border-radius: 14px;
    border: 1px solid var(--border-color);
}

.pdf-preview-thumbnail {
    width: 90px;
    height: 120px;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.pdf-preview-thumbnail canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pdf-preview-thumbnail::after {
    content: '\f1c1';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    color: var(--accent-primary);
    opacity: 0.2;
    z-index: 0;
}

.pdf-preview-thumbnail:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.pdf-preview-info {
    flex: 1;
}

.pdf-preview-name {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.3rem;
    font-weight: 500;
}

.pdf-preview-size {
    color: var(--text-secondary);
    font-size: 0.85rem;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.pdf-preview-pages {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    background: var(--bg-primary);
    padding: 0.3rem 0.6rem;
    border-radius: 12px;
    width: fit-content;
}

.pdf-preview-pages i {
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.pdf-preview-remove {
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 3px 10px rgba(229, 62, 62, 0.3);
}

.pdf-preview-remove:hover {
    transform: scale(1.1) rotate(90deg);
    background: #C53030;
    box-shadow: 0 5px 15px rgba(229, 62, 62, 0.4);
}

/* PDF Upload Button */
.input-pdf-button {
    width: 45px;
    height: 45px;
    border-radius: 14px;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    position: relative;
}

.input-pdf-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: var(--accent-gradient);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 0;
}

.input-pdf-button:hover::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.1;
    border-radius: 14px;
}

.input-pdf-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(99, 122, 238, 0.15);
}

.input-pdf-button:active {
    transform: translateY(-2px) scale(0.97);
    box-shadow: 0 4px 10px rgba(99, 122, 238, 0.1);
}

.input-pdf-button i {
    position: relative;
    z-index: 1;
    font-size: 1.1rem;
    transition: transform 0.3s ease;
    color: #e34c4c;
}

.input-pdf-button:hover i {
    transform: scale(1.1);
}

/* PDF Message Styles */
.pdf-message-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: var(--bg-secondary);
    border-radius: 14px;
    margin-bottom: 0.8rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.pdf-message-container:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.pdf-message-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.pdf-message-info {
    flex: 1;
    min-width: 0;
}

.pdf-message-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.2rem;
}

.pdf-message-meta {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.pdf-message-pages, .pdf-message-size {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.pdf-message-pages i, .pdf-message-size i {
    font-size: 0.8rem;
    color: var(--accent-primary);
}

/* PDF Management Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 1rem;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-tertiary);
    max-width: 500px;
    width: 100%;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px var(--shadow-color);
    transform: translateY(30px) scale(0.95);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--border-color);
    will-change: transform, opacity;
    backface-visibility: hidden;
    z-index: 10001;
    pointer-events: auto;
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
    box-shadow: 0 25px 50px var(--shadow-color);
}

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

.modal-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-close:hover {
    background: rgba(99, 122, 238, 0.2);
    transform: rotate(90deg);
}

.modal-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.pdf-upload-area {
    margin-bottom: 1.5rem;
}

.pdf-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 2rem 1.5rem;
    text-align: center;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    cursor: pointer;
    background: var(--bg-secondary);
}

.pdf-dropzone:hover {
    border-color: var(--accent-primary);
    background: rgba(99, 122, 238, 0.05);
}

.pdf-dropzone.dragover {
    border-color: var(--accent-primary);
    background: rgba(99, 122, 238, 0.1);
    transform: scale(1.01);
}

.pdf-dropzone i {
    font-size: 2.5rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
    opacity: 0.8;
}

.pdf-dropzone p {
    font-size: 1rem;
    margin: 0;
}

.pdf-list-container h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.pdf-management-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    max-height: 300px;
    overflow-y: auto;
}

.pdf-management-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 14px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.pdf-management-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.pdf-item-thumbnail {
    width: 45px;
    height: 60px;
    border-radius: 6px;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.pdf-item-thumbnail canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pdf-item-thumbnail::after {
    content: '\f1c1';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    color: var (--accent-primary);
    opacity: 0.2;
    z-index: 0;
}

.pdf-management-info {
    flex: 1;
    min-width: 0;
}

.pdf-management-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pdf-management-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.pdf-management-size,
.pdf-management-pages,
.pdf-management-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.pdf-management-size i,
.pdf-management-pages i,
.pdf-management-date i {
    font-size: 0.85rem;
    color: var(--accent-primary);
}

.pdf-management-actions {
    display: flex;
    gap: 0.5rem;
}

.pdf-management-button {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.pdf-management-button:hover {
    transform: translateY(-2px);
    color: var(--text-primary);
    background: rgba(99, 122, 238, 0.1);
}

.pdf-management-button.delete-button {
    color: var(--danger);
}

.pdf-management-button.delete-button:hover {
    background: rgba(229, 62, 62, 0.1);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
    gap: 1rem;
    border-top: 1px solid var(--border-color);
}

.modal-button {
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.modal-button.primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 122, 238, 0.2);
}

.modal-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 122, 238, 0.3);
}

.modal-button.secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.modal-button.secondary:hover {
    background: rgba(99, 122, 238, 0.1);
    transform: translateY(-2px);
}

/* Loading PDF Indicator */
.pdf-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
}

.pdf-loading-icon {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(99, 122, 238, 0.1);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spinner 1s linear infinite;
}

.pdf-loading-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* PDF Message in Chat */
.ai .pdf-reference {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 0.8rem;
    margin-bottom: 0.8rem;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.3s ease;
}

.ai .pdf-reference:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.pdf-reference-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
}

.pdf-reference-info {
    flex: 1;
}

.pdf-reference-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.pdf-reference-pages {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.pdf-reference-pages i {
    color: var(--accent-primary);
    font-size: 0.85rem;
}

/* Make all new elements responsive */
@media (max-width: 768px) {
    .pdf-library-section {
        display: none; /* Hide PDF library in sidebar on mobile */
    }
    
    .input-pdf-button {
        width: 40px;
        height: 40px;
        border-radius: 12px;
    }
    
    .pdf-preview-thumbnail {
        width: 70px;
        height: 90px;
    }
    
    .modal-content {
        max-width: 95%;
    }
    
    .pdf-dropzone {
        padding: 1.5rem 1rem;
    }
    
    .pdf-dropzone i {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .input-pdf-button {
        width: 36px;
        height: 36px;
        border-radius: 10px;
    }
    
    .input-pdf-button i {
        font-size: 1rem;
    }
    
    .pdf-preview-thumbnail {
        width: 60px;
        height: 80px;
    }
    
    .pdf-management-item {
        padding: 0.8rem;
    }
    
    .pdf-item-thumbnail {
        width: 36px;
        height: 48px;
    }
    
    .pdf-management-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .modal-header {
        padding: 1rem;
    }
    
    .modal-button {
        padding: 0.7rem 1rem;
    }
    
    /* Reduce popup size on mobile */
    .popup-content {
        max-width: 92% !important;
        width: 92% !important;
        border-radius: 16px;
    }
    
    /* Make customization UI more compact */
    .customization-popup .popup-content {
        max-width: 92% !important;
    }
    
    .popup-header h3 {
        font-size: 1.2rem;
    }
    
    .popup-body {
        padding: 0.8rem;
    }
    
    .customize-section label {
        font-size: 0.9rem;
        margin-bottom: 0.3rem;
    }
    
    .customize-section input[type="text"],
    .customize-section textarea {
        padding: 0.7rem;
        font-size: 0.9rem;
        margin-bottom: 0.6rem;
        border-radius: 12px;
    }
    
    .customize-section textarea {
        min-height: 80px;
    }
    
    .suggestion-chip {
        font-size: 0.8rem;
        padding: 0.3rem 0.6rem;
        border-radius: 12px;
    }
    
    .popup-button {
        padding: 0.8rem;
        font-size: 0.9rem;
        border-radius: 12px;
    }
    
    .popup-actions {
        padding: 0 0.8rem 0.8rem;
    }
    
    /* Make welcome popup more compact */
    .popup-feature {
        margin-bottom: 0.8rem;
    }
    
    .popup-icon {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
    
    .popup-text h4 {
        font-size: 0.9rem;
        margin-bottom: 0.3rem;
    }
    
    .popup-text p {
        font-size: 0.8rem;
    }
}

@media (max-height: 600px) {
    .profile-image {
        width: 80px;
        height: 80px;
        border-radius: 20px;
    }
    
    .profile-name {
        font-size: 1.5rem;
    }
    
    .profile-title {
        font-size: 0.9rem;
    }
    
    .message-content-wrapper {
        padding: 0.7rem 0.9rem;
    }
    
    .input-area {
        padding: 0.8rem;
    }
}