/**
 * AI PDF Tutor - Frontend Styles
 * 
 * @package AI_PDF_Tutor
 */

/* ==========================================================================
   CSS Variables
   ========================================================================== */

:root {
    --ai-pdf-primary: #2563eb;
    --ai-pdf-primary-hover: #1d4ed8;
    --ai-pdf-primary-light: #dbeafe;
    --ai-pdf-secondary: #64748b;
    --ai-pdf-success: #10b981;
    --ai-pdf-success-light: #d1fae5;
    --ai-pdf-warning: #f59e0b;
    --ai-pdf-warning-light: #fef3c7;
    --ai-pdf-error: #ef4444;
    --ai-pdf-error-light: #fee2e2;
    --ai-pdf-background: #f8fafc;
    --ai-pdf-surface: #ffffff;
    --ai-pdf-border: #e2e8f0;
    --ai-pdf-text: #1e293b;
    --ai-pdf-text-secondary: #64748b;
    --ai-pdf-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --ai-pdf-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --ai-pdf-radius: 8px;
    --ai-pdf-radius-lg: 12px;
    --ai-pdf-transition: 0.2s ease;
}

/* ==========================================================================
   Standalone Template Base
   ========================================================================== */

body.ai-pdf-tutor-standalone {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--ai-pdf-background);
}

body.ai-pdf-tutor-standalone #wpadminbar {
    display: none !important;
}

body.ai-pdf-tutor-standalone.admin-bar {
    margin-top: 0 !important;
}

/* Archive Page Standalone */
body.ai-pdf-tutor-archive-page {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--ai-pdf-background);
    min-height: 100vh;
}

body.ai-pdf-tutor-archive-page #wpadminbar {
    display: none !important;
}

body.ai-pdf-tutor-archive-page.admin-bar {
    margin-top: 0 !important;
}

.ai-pdf-tutor-archive-wrapper {
    min-height: 100vh;
}

/* Archive Top Bar */
.ai-pdf-tutor-archive-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 60px;
    background: var(--ai-pdf-surface);
    border-bottom: 1px solid var(--ai-pdf-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.ai-pdf-tutor-archive-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--ai-pdf-text);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: color var(--ai-pdf-transition);
}

.ai-pdf-tutor-archive-logo:hover {
    color: var(--ai-pdf-primary);
}

.ai-pdf-tutor-archive-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.ai-pdf-tutor-nav-link {
    padding: 8px 16px;
    color: var(--ai-pdf-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--ai-pdf-radius);
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-nav-link:hover {
    background: var(--ai-pdf-primary-light);
    color: var(--ai-pdf-primary);
}

/* ==========================================================================
   Main Container & Layout
   ========================================================================== */

.ai-pdf-tutor-container {
    width: 100vw;
    height: 100vh;
    max-width: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.ai-pdf-tutor-layout {
    display: flex;
    height: 100vh;
    width: 100%;
    background: var(--ai-pdf-background);
}

/* ==========================================================================
   PDF Panel (Left - 50% default, resizable)
   ========================================================================== */

.ai-pdf-tutor-layout {
    --pdf-panel-width: 50%;
    --chat-panel-width: 50%;
}

.ai-pdf-tutor-pdf-panel {
    width: var(--pdf-panel-width);
    display: flex;
    flex-direction: column;
    border-right: none;
    background: var(--ai-pdf-surface);
    overflow: hidden;
    min-width: 30%;
    max-width: 80%;
}

.ai-pdf-tutor-pdf-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 20px;
    background: var(--ai-pdf-surface);
    border-bottom: 1px solid var(--ai-pdf-border);
    height: 56px;
    flex-shrink: 0;
}

/* Back Button */
.ai-pdf-tutor-back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--ai-pdf-background);
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    color: var(--ai-pdf-text);
    text-decoration: none;
    transition: all var(--ai-pdf-transition);
    flex-shrink: 0;
}

.ai-pdf-tutor-back-btn:hover {
    background: var(--ai-pdf-primary);
    border-color: var(--ai-pdf-primary);
    color: white;
}

.ai-pdf-tutor-pdf-header h1 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--ai-pdf-text);
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

/* ==========================================================================
   PDF Viewer
   ========================================================================== */

.ai-pdf-tutor-pdf-viewer {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #404040;
}

.ai-pdf-tutor-post-viewer {
    flex: 1;
    overflow: auto;
    background: var(--ai-pdf-background);
    padding: 24px;
}

.ai-pdf-tutor-post-content {
    max-width: 820px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius-lg);
    padding: 28px 32px;
    color: var(--ai-pdf-text);
    line-height: 1.7;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
}

.ai-pdf-tutor-post-content > *:first-child {
    margin-top: 0;
}

.ai-pdf-tutor-post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--ai-pdf-radius);
}

.ai-pdf-tutor-post-content figure {
    margin: 0 0 1.2em;
}

.ai-pdf-tutor-post-content figcaption {
    color: var(--ai-pdf-text-light);
    font-size: 13px;
}

.ai-pdf-tutor-pdf-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 10px 16px;
    background: #2d2d2d;
    border-bottom: 1px solid #1a1a1a;
    flex-shrink: 0;
}

.ai-pdf-tutor-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 10px;
    background: #4a4a4a;
    color: #ffffff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background var(--ai-pdf-transition);
    text-decoration: none;
}

.ai-pdf-tutor-btn:hover {
    background: #5a5a5a;
}

.ai-pdf-tutor-btn:active {
    background: #3a3a3a;
}

.ai-pdf-tutor-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#pdf-page-info {
    color: #ffffff;
    font-size: 13px;
    font-weight: 500;
    min-width: 100px;
    text-align: center;
}

.ai-pdf-tutor-zoom-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
    padding-left: 12px;
    border-left: 1px solid #4a4a4a;
}

#pdf-zoom-value {
    color: #ffffff;
    font-size: 13px;
    min-width: 45px;
    text-align: center;
}

/* Canvas Container - Critical for zoom */
.ai-pdf-tutor-canvas-container {
    flex: 1;
    overflow: auto;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 20px;
    background: #525659;
    position: relative; /* For loading overlay positioning */
}

#pdf-canvas {
    display: block;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    background: white;
    /* Don't constrain dimensions - let PDF.js control them */
    max-width: none !important;
    max-height: none !important;
}

.ai-pdf-tutor-no-pdf {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #999;
    text-align: center;
    padding: 40px;
}

.ai-pdf-tutor-no-pdf svg {
    margin-bottom: 16px;
    opacity: 0.5;
}

/* ==========================================================================
   Resizable Divider
   ========================================================================== */

.ai-pdf-tutor-resizer {
    width: 6px;
    background: var(--ai-pdf-border);
    cursor: col-resize;
    flex-shrink: 0;
    position: relative;
    transition: background var(--ai-pdf-transition);
    z-index: 10;
}

.ai-pdf-tutor-resizer::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 40px;
    background: var(--ai-pdf-secondary);
    border-radius: 2px;
    opacity: 0.4;
    transition: opacity var(--ai-pdf-transition), height var(--ai-pdf-transition);
}

.ai-pdf-tutor-resizer:hover {
    background: var(--ai-pdf-primary-light);
}

.ai-pdf-tutor-resizer:hover::before {
    opacity: 0.8;
    height: 60px;
    background: var(--ai-pdf-primary);
}

.ai-pdf-tutor-resizer.resizing {
    background: var(--ai-pdf-primary-light);
}

.ai-pdf-tutor-resizer.resizing::before {
    opacity: 1;
    height: 80px;
    background: var(--ai-pdf-primary);
}

/* Prevent text selection during resize */
.ai-pdf-tutor-layout.resizing {
    user-select: none;
    -webkit-user-select: none;
    cursor: col-resize;
}

.ai-pdf-tutor-layout.resizing iframe,
.ai-pdf-tutor-layout.resizing canvas {
    pointer-events: none;
}

/* ==========================================================================
   Chat Panel (Right - 50% default, resizable)
   ========================================================================== */

.ai-pdf-tutor-chat-panel {
    width: var(--chat-panel-width);
    display: flex;
    flex-direction: column;
    background: var(--ai-pdf-surface);
    overflow: hidden;
    min-width: 20%;
    max-width: 70%;
    position: relative;
}

.ai-pdf-tutor-chat-header {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 10px 20px 8px;
    background: var(--ai-pdf-surface);
    border-bottom: none;
    flex-shrink: 0;
}

.ai-pdf-tutor-profile-card {
    padding: 0 20px 8px;
    background: var(--ai-pdf-surface);
    flex-shrink: 0;
}

.ai-pdf-tutor-header-main {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1;
    border: 1px solid var(--ai-pdf-border);
    border-radius: 10px;
    background: #f9fafb;
    padding: 10px 12px;
}

.ai-pdf-tutor-header-avatar {
    width: 44px;
    height: 44px;
    border-radius: 999px;
    overflow: hidden;
    background: var(--ai-pdf-primary-light);
    border: 1px solid var(--ai-pdf-border);
    flex-shrink: 0;
}

.ai-pdf-tutor-header-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.ai-pdf-tutor-header-avatar-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--ai-pdf-primary);
    text-transform: uppercase;
}

.ai-pdf-tutor-header-copy {
    min-width: 0;
    flex: 1;
}

.ai-pdf-tutor-chat-header h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--ai-pdf-text);
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ai-pdf-tutor-header-copy p {
    margin: 2px 0 0;
    color: var(--ai-pdf-text-secondary);
    font-size: 12px;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ai-pdf-tutor-header-info-wrap {
    position: relative;
    flex-shrink: 0;
}

.ai-pdf-tutor-header-info-btn {
    width: 22px;
    height: 22px;
    border-radius: 999px;
    border: 1px solid var(--ai-pdf-border);
    background: var(--ai-pdf-background);
    color: var(--ai-pdf-text-secondary);
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    padding: 0;
    cursor: pointer;
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-header-info-btn:hover {
    border-color: var(--ai-pdf-primary);
    color: var(--ai-pdf-primary);
    background: var(--ai-pdf-primary-light);
}

.ai-pdf-tutor-header-info-btn:focus-visible {
    outline: 2px solid var(--ai-pdf-primary);
    outline-offset: 1px;
}

.ai-pdf-tutor-header-tooltip {
    position: absolute;
    top: 28px;
    right: 0;
    width: 240px;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--ai-pdf-border);
    background: #111827;
    color: #f9fafb;
    font-size: 12px;
    line-height: 1.45;
    box-shadow: var(--ai-pdf-shadow-lg);
    opacity: 0;
    transform: translateY(-2px);
    pointer-events: none;
    transition: opacity var(--ai-pdf-transition), transform var(--ai-pdf-transition);
    z-index: 20;
}

.ai-pdf-tutor-header-info-wrap:hover .ai-pdf-tutor-header-tooltip,
.ai-pdf-tutor-header-info-btn:focus-visible + .ai-pdf-tutor-header-tooltip {
    opacity: 1;
    transform: translateY(0);
}

.ai-pdf-tutor-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.ai-pdf-tutor-status-ready {
    background: var(--ai-pdf-success-light);
    color: var(--ai-pdf-success);
}

/* Reset Conversation Button */
.ai-pdf-tutor-reset-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--ai-pdf-background);
    color: var(--ai-pdf-text-secondary);
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-reset-btn:hover {
    background: var(--ai-pdf-error-light);
    border-color: var(--ai-pdf-error);
    color: var(--ai-pdf-error);
}

.ai-pdf-tutor-reset-btn:active {
    transform: scale(0.98);
}

.ai-pdf-tutor-reset-btn svg {
    transition: transform var(--ai-pdf-transition);
}

.ai-pdf-tutor-reset-btn:hover svg {
    transform: rotate(-45deg);
}

/* Reset confirmation toast */
.ai-pdf-tutor-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--ai-pdf-text);
    color: white;
    padding: 12px 24px;
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--ai-pdf-shadow-lg);
    z-index: 10000;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.ai-pdf-tutor-toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ==========================================================================
   Chat Messages
   ========================================================================== */

.ai-pdf-tutor-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 12px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Instructions Section */
.ai-pdf-tutor-instructions {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #bae6fd;
    border-radius: var(--ai-pdf-radius-lg);
    overflow: hidden;
    margin-bottom: 8px;
}

.ai-pdf-tutor-instructions-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(14, 165, 233, 0.1);
    border-bottom: 1px solid #bae6fd;
    font-weight: 600;
    font-size: 13px;
    color: #0369a1;
}

.ai-pdf-tutor-instructions-content {
    padding: 16px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--ai-pdf-text);
}

.ai-pdf-tutor-instructions-content p {
    margin: 0 0 12px 0;
}

.ai-pdf-tutor-instructions-content p:last-child {
    margin-bottom: 0;
}

.ai-pdf-tutor-instructions-content ul,
.ai-pdf-tutor-instructions-content ol {
    margin: 0 0 12px 0;
    padding-left: 20px;
}

.ai-pdf-tutor-instructions-content li {
    margin-bottom: 6px;
}

/* Chat Notice */
.ai-pdf-tutor-chat-notice {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px;
    background: var(--ai-pdf-warning-light);
    border: 1px solid var(--ai-pdf-warning);
    border-radius: var(--ai-pdf-radius-lg);
    color: #92400e;
}

.ai-pdf-tutor-chat-notice svg {
    margin-bottom: 12px;
    color: var(--ai-pdf-warning);
}

.ai-pdf-tutor-chat-notice p {
    margin: 0;
    font-size: 14px;
    line-height: 1.5;
}

/* Chat Messages */
.ai-pdf-tutor-message {
    max-width: 90%;
    padding: 12px 16px;
    border-radius: var(--ai-pdf-radius-lg);
    font-size: 14px;
    line-height: 1.6;
    word-wrap: break-word;
    animation: messageSlide 0.3s ease;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-pdf-tutor-message-user {
    align-self: flex-end;
    background: var(--ai-pdf-primary);
    color: white;
    border-bottom-right-radius: 4px;
}

.ai-pdf-tutor-message-assistant {
    align-self: flex-start;
    background: var(--ai-pdf-background);
    color: var(--ai-pdf-text);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--ai-pdf-border);
}

.ai-pdf-tutor-message code {
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
    font-size: 13px;
}

.ai-pdf-tutor-message-user code {
    background: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   Markdown Message Formatting
   ========================================================================== */

.ai-pdf-tutor-message-assistant .ai-pdf-message-paragraph {
    margin: 0 0 8px 0;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-paragraph:last-child {
    margin-bottom: 0;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-header {
    margin: 16px 0 8px 0;
    font-weight: 600;
    line-height: 1.3;
    color: var(--ai-pdf-text);
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-header:first-child {
    margin-top: 0;
}

.ai-pdf-tutor-message-assistant h3.ai-pdf-message-header {
    font-size: 1.1em;
}

.ai-pdf-tutor-message-assistant h4.ai-pdf-message-header {
    font-size: 1.05em;
}

.ai-pdf-tutor-message-assistant h5.ai-pdf-message-header,
.ai-pdf-tutor-message-assistant h6.ai-pdf-message-header {
    font-size: 1em;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-list {
    margin: 8px 0;
    padding-left: 24px;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-list li {
    margin-bottom: 4px;
    line-height: 1.5;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-list li:last-child {
    margin-bottom: 0;
}

.ai-pdf-tutor-message-assistant ol.ai-pdf-message-list {
    list-style-type: decimal;
}

.ai-pdf-tutor-message-assistant ul.ai-pdf-message-list {
    list-style-type: disc;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-code {
    background: rgba(0, 0, 0, 0.08);
    border-radius: 6px;
    padding: 12px;
    margin: 8px 0;
    overflow-x: auto;
    font-family: "SF Mono", Monaco, "Cascadia Code", Consolas, monospace;
    font-size: 13px;
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-code code {
    background: transparent;
    padding: 0;
    font-size: inherit;
}

.ai-pdf-tutor-message-assistant .ai-pdf-message-hr {
    border: none;
    border-top: 1px solid var(--ai-pdf-border);
    margin: 12px 0;
}

.ai-pdf-tutor-message-assistant a {
    color: var(--ai-pdf-primary);
    text-decoration: underline;
}

.ai-pdf-tutor-message-assistant a:hover {
    color: var(--ai-pdf-primary-hover);
}

.ai-pdf-tutor-message-assistant strong {
    font-weight: 600;
}

.ai-pdf-tutor-message-assistant em {
    font-style: italic;
}

/* Typing Indicator */
.ai-pdf-tutor-typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 0;
}

.ai-pdf-tutor-typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--ai-pdf-primary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.ai-pdf-tutor-typing-indicator span:nth-child(1) {
    animation-delay: -0.32s;
}

.ai-pdf-tutor-typing-indicator span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ==========================================================================
   Chat Input
   ========================================================================== */

.ai-pdf-tutor-chat-input-container {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 16px 20px;
    background: var(--ai-pdf-surface);
    border-top: 1px solid var(--ai-pdf-border);
    flex-shrink: 0;
    box-sizing: border-box;
}

.ai-pdf-tutor-chat-input {
    flex: 1;
    min-height: 44px;
    max-height: 120px;
    padding: 10px 16px;
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    font-family: inherit;
    line-height: 1.4;
    color: var(--ai-pdf-text);
    background: var(--ai-pdf-surface);
    transition: border-color var(--ai-pdf-transition), box-shadow var(--ai-pdf-transition);
    box-sizing: border-box;
    resize: none;
    overflow-y: auto;
}

.ai-pdf-tutor-chat-input:focus {
    outline: none;
    border-color: var(--ai-pdf-primary);
    box-shadow: 0 0 0 3px var(--ai-pdf-primary-light);
}

.ai-pdf-tutor-chat-input:disabled {
    background: var(--ai-pdf-background);
    cursor: not-allowed;
}

.ai-pdf-tutor-chat-input::placeholder {
    color: var(--ai-pdf-text-secondary);
}

.ai-pdf-tutor-chat-send {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--ai-pdf-primary);
    color: white;
    border: none;
    border-radius: var(--ai-pdf-radius);
    cursor: pointer;
    transition: background var(--ai-pdf-transition), transform var(--ai-pdf-transition);
    flex-shrink: 0;
}

.ai-pdf-tutor-chat-send:hover:not(:disabled) {
    background: var(--ai-pdf-primary-hover);
    transform: scale(1.05);
}

.ai-pdf-tutor-chat-send:disabled {
    background: var(--ai-pdf-secondary);
    cursor: not-allowed;
}

/* ==========================================================================
   Microphone Button
   ========================================================================== */

.ai-pdf-tutor-mic-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--ai-pdf-background);
    color: var(--ai-pdf-text-secondary);
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    cursor: pointer;
    transition: all var(--ai-pdf-transition);
    flex-shrink: 0;
    position: relative;
}

.ai-pdf-tutor-mic-btn:hover:not(:disabled) {
    background: var(--ai-pdf-primary-light);
    border-color: var(--ai-pdf-primary);
    color: var(--ai-pdf-primary);
}

.ai-pdf-tutor-mic-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.ai-pdf-tutor-mic-btn.listening {
    background: var(--ai-pdf-error);
    border-color: var(--ai-pdf-error);
    color: white;
    animation: micPulse 1.5s ease-in-out infinite;
}

.ai-pdf-tutor-mic-btn.listening:hover {
    background: #dc2626;
    border-color: #dc2626;
    color: white;
}

@keyframes micPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
    }
}

.ai-pdf-tutor-mic-btn.tts-active {
    background: var(--ai-pdf-success);
    border-color: var(--ai-pdf-success);
    color: white;
    animation: ttsPulse 1s ease-in-out infinite;
}

@keyframes ttsPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Voice Session States */
.ai-pdf-tutor-mic-btn.voice-connecting {
    background: var(--ai-pdf-primary);
    border-color: var(--ai-pdf-primary);
    color: white;
    animation: voiceConnecting 1s ease-in-out infinite;
    cursor: wait;
}

@keyframes voiceConnecting {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.ai-pdf-tutor-mic-btn.voice-active {
    background: var(--ai-pdf-success);
    border-color: var(--ai-pdf-success);
    color: white;
    animation: voiceActivePulse 2s ease-in-out infinite;
}

.ai-pdf-tutor-mic-btn.voice-active:hover {
    background: #dc2626;
    border-color: #dc2626;
}

@keyframes voiceActivePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
}

.ai-pdf-tutor-mic-btn.voice-active.agent-speaking {
    animation: agentSpeaking 0.8s ease-in-out infinite;
}

@keyframes agentSpeaking {
    0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
}

.ai-pdf-tutor-mic-btn.voice-active.user-speaking {
    background: var(--ai-pdf-error);
    border-color: var(--ai-pdf-error);
    animation: micPulse 1.5s ease-in-out infinite;
}

/* Voice message indicator */
.ai-pdf-tutor-message-voice::before {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpath d='M12 1a3 3 0 0 0-3 3v8a3 3 0 0 0 6 0V4a3 3 0 0 0-3-3z'/%3E%3Cpath d='M19 10v2a7 7 0 0 1-14 0v-2'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    margin-right: 4px;
    vertical-align: middle;
    flex-shrink: 0;
}

/* TTS Stop Button */
.ai-pdf-tutor-tts-stop {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--ai-pdf-error);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-tts-stop:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* ==========================================================================
   Error Modal
   ========================================================================== */

.ai-pdf-tutor-error-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ai-pdf-tutor-error-modal-visible {
    opacity: 1;
}

.ai-pdf-tutor-error-content {
    background: var(--ai-pdf-surface);
    padding: 32px;
    border-radius: var(--ai-pdf-radius-lg);
    max-width: 400px;
    text-align: center;
    box-shadow: var(--ai-pdf-shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.ai-pdf-tutor-error-modal-visible .ai-pdf-tutor-error-content {
    transform: scale(1);
}

.ai-pdf-tutor-error-icon {
    margin-bottom: 16px;
    color: var(--ai-pdf-error);
}

.ai-pdf-tutor-error-content h3 {
    margin: 0 0 12px 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--ai-pdf-text);
}

.ai-pdf-tutor-error-content p {
    margin: 0 0 24px 0;
    color: var(--ai-pdf-text-secondary);
    line-height: 1.5;
}

.ai-pdf-tutor-error-close {
    padding: 10px 24px;
    background: var(--ai-pdf-primary);
    color: white;
    border: none;
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--ai-pdf-transition);
}

.ai-pdf-tutor-error-close:hover {
    background: var(--ai-pdf-primary-hover);
}

/* ==========================================================================
   Archive Page
   ========================================================================== */

.ai-pdf-tutor-archive {
    max-width: 1280px;
    margin: 0 auto;
    padding: 40px 24px;
}

.ai-pdf-tutor-archive-header {
    text-align: center;
    margin-bottom: 40px;
}

.ai-pdf-tutor-archive-title {
    margin: 0 0 12px 0;
    font-size: 36px;
    font-weight: 700;
    color: var(--ai-pdf-text);
}

.ai-pdf-tutor-archive-description {
    margin: 0;
    font-size: 18px;
    color: var(--ai-pdf-text-secondary);
}

/* Filters */
.ai-pdf-tutor-archive-filters {
    background: var(--ai-pdf-surface);
    padding: 24px;
    border-radius: var(--ai-pdf-radius-lg);
    box-shadow: var(--ai-pdf-shadow);
    margin-bottom: 32px;
}

.ai-pdf-tutor-filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-end;
}

.ai-pdf-tutor-filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-pdf-tutor-filter-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ai-pdf-text);
}

.ai-pdf-tutor-select,
.ai-pdf-tutor-search-input {
    padding: 10px 14px;
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    color: var(--ai-pdf-text);
    background: var(--ai-pdf-surface);
    min-width: 180px;
    transition: border-color var(--ai-pdf-transition);
}

.ai-pdf-tutor-select:focus,
.ai-pdf-tutor-search-input:focus {
    outline: none;
    border-color: var(--ai-pdf-primary);
}

.ai-pdf-tutor-search-group {
    flex: 1;
    min-width: 200px;
}

.ai-pdf-tutor-search-input {
    width: 100%;
}

.ai-pdf-tutor-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--ai-pdf-primary);
    color: white;
    border: none;
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--ai-pdf-transition);
}

.ai-pdf-tutor-filter-btn:hover {
    background: var(--ai-pdf-primary-hover);
}

.ai-pdf-tutor-clear-btn {
    padding: 10px 20px;
    background: transparent;
    color: var(--ai-pdf-text-secondary);
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    text-decoration: none;
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-clear-btn:hover {
    background: var(--ai-pdf-background);
    color: var(--ai-pdf-text);
}

/* Posts Grid */
.ai-pdf-tutor-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.ai-pdf-tutor-archive-item {
    background: var(--ai-pdf-surface);
    border-radius: var(--ai-pdf-radius-lg);
    box-shadow: var(--ai-pdf-shadow);
    overflow: hidden;
    transition: transform var(--ai-pdf-transition), box-shadow var(--ai-pdf-transition);
}

.ai-pdf-tutor-archive-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--ai-pdf-shadow-lg);
}

.ai-pdf-tutor-item-thumbnail {
    position: relative;
    aspect-ratio: 16 / 10;
    background: var(--ai-pdf-background);
    overflow: hidden;
}

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

.ai-pdf-tutor-item-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--ai-pdf-text-secondary);
    background: linear-gradient(135deg, #f0f4f8 0%, #d9e2ec 100%);
}

.ai-pdf-tutor-item-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ai-pdf-tutor-badge-ready {
    background: var(--ai-pdf-success);
    color: white;
}

.ai-pdf-tutor-item-content {
    padding: 20px;
}

.ai-pdf-tutor-item-title {
    margin: 0 0 12px 0;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
}

.ai-pdf-tutor-item-title a {
    color: var(--ai-pdf-text);
    text-decoration: none;
    transition: color var(--ai-pdf-transition);
}

.ai-pdf-tutor-item-title a:hover {
    color: var(--ai-pdf-primary);
}

.ai-pdf-tutor-item-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--ai-pdf-text-secondary);
}

.ai-pdf-tutor-item-date {
    display: flex;
    align-items: center;
    gap: 6px;
}

.ai-pdf-tutor-item-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.ai-pdf-tutor-item-category {
    padding: 4px 10px;
    background: var(--ai-pdf-primary-light);
    color: var(--ai-pdf-primary);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-item-category:hover {
    background: var(--ai-pdf-primary);
    color: white;
}

.ai-pdf-tutor-item-excerpt {
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--ai-pdf-text-secondary);
}

.ai-pdf-tutor-item-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--ai-pdf-primary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: gap var(--ai-pdf-transition);
}

.ai-pdf-tutor-item-link:hover {
    gap: 10px;
}

/* No Posts */
.ai-pdf-tutor-no-posts {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    text-align: center;
    background: var(--ai-pdf-surface);
    border-radius: var(--ai-pdf-radius-lg);
    box-shadow: var(--ai-pdf-shadow);
}

.ai-pdf-tutor-no-posts svg {
    margin-bottom: 24px;
    color: var(--ai-pdf-text-secondary);
    opacity: 0.5;
}

.ai-pdf-tutor-no-posts h3 {
    margin: 0 0 8px 0;
    font-size: 24px;
    font-weight: 600;
    color: var(--ai-pdf-text);
}

.ai-pdf-tutor-no-posts p {
    margin: 0 0 24px 0;
    color: var(--ai-pdf-text-secondary);
}

.ai-pdf-tutor-archive-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--ai-pdf-primary);
    color: white;
    border: none;
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background var(--ai-pdf-transition);
}

.ai-pdf-tutor-archive-btn:hover {
    background: var(--ai-pdf-primary-hover);
    color: white;
}

/* Pagination */
.ai-pdf-tutor-pagination {
    margin-top: 40px;
}

.ai-pdf-tutor-pagination ul {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.ai-pdf-tutor-pagination li {
    margin: 0;
}

.ai-pdf-tutor-pagination a,
.ai-pdf-tutor-pagination span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    background: var(--ai-pdf-surface);
    color: var(--ai-pdf-text);
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    text-decoration: none;
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-pagination a:hover {
    background: var(--ai-pdf-primary);
    border-color: var(--ai-pdf-primary);
    color: white;
}

.ai-pdf-tutor-pagination .current {
    background: var(--ai-pdf-primary);
    border-color: var(--ai-pdf-primary);
    color: white;
}

/* ==========================================================================
   Header Action Buttons (Copy / Download)
   ========================================================================== */

.ai-pdf-tutor-header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 0;
    flex-shrink: 0;
}

.ai-pdf-tutor-header-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background: var(--ai-pdf-background);
    color: var(--ai-pdf-text-secondary);
    border: 1px solid var(--ai-pdf-border);
    border-radius: var(--ai-pdf-radius);
    cursor: pointer;
    transition: all var(--ai-pdf-transition);
}

.ai-pdf-tutor-header-btn:hover {
    background: var(--ai-pdf-primary-light);
    border-color: var(--ai-pdf-primary);
    color: var(--ai-pdf-primary);
}

.ai-pdf-tutor-header-btn:active {
    transform: scale(0.95);
}

/* ==========================================================================
   Scroll-to-Bottom Button
   ========================================================================== */

.ai-pdf-tutor-scroll-bottom {
    display: none;
    position: absolute;
    bottom: 84px;
    right: 20px;
    z-index: 10;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    background: var(--ai-pdf-surface);
    color: var(--ai-pdf-text-secondary);
    border: 1px solid var(--ai-pdf-border);
    border-radius: 50%;
    box-shadow: var(--ai-pdf-shadow);
    cursor: pointer;
    transition: all var(--ai-pdf-transition);
    opacity: 0;
    transform: translateY(8px);
}

.ai-pdf-tutor-scroll-bottom.visible {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.ai-pdf-tutor-scroll-bottom:hover {
    background: var(--ai-pdf-primary);
    border-color: var(--ai-pdf-primary);
    color: white;
    box-shadow: var(--ai-pdf-shadow-lg);
}

/* ==========================================================================
   Message Timestamps on Hover
   ========================================================================== */

.ai-pdf-tutor-msg-time {
    display: none;
    font-size: 11px;
    color: var(--ai-pdf-text-secondary);
    margin-top: 6px;
    font-weight: 400;
    opacity: 0.7;
}

.ai-pdf-tutor-message:hover .ai-pdf-tutor-msg-time {
    display: block;
}

.ai-pdf-tutor-message-user .ai-pdf-tutor-msg-time {
    color: rgba(255, 255, 255, 0.7);
    text-align: right;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 1024px) {
    .ai-pdf-tutor-layout {
        flex-direction: column;
        height: auto;
        min-height: 100vh;
        --pdf-panel-width: 100% !important;
        --chat-panel-width: 100% !important;
    }
    
    .ai-pdf-tutor-pdf-panel,
    .ai-pdf-tutor-chat-panel {
        width: 100% !important;
        min-width: 100% !important;
        max-width: 100% !important;
    }
    
    .ai-pdf-tutor-pdf-panel {
        border-bottom: 1px solid var(--ai-pdf-border);
        height: 60vh;
        min-height: 400px;
    }
    
    .ai-pdf-tutor-chat-panel {
        height: 40vh;
        min-height: 300px;
    }
    
    /* Hide resizer on mobile - stacked layout */
    .ai-pdf-tutor-resizer {
        display: none;
    }
}

@media (max-width: 768px) {
    .ai-pdf-tutor-pdf-controls {
        flex-wrap: wrap;
        gap: 8px;
        padding: 8px 12px;
    }
    
    .ai-pdf-tutor-zoom-controls {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
    }
    
    .ai-pdf-tutor-pdf-header {
        padding: 12px 16px;
    }
    
    .ai-pdf-tutor-pdf-header h1 {
        font-size: 16px;
    }

    .ai-pdf-tutor-post-viewer {
        padding: 12px;
    }

    .ai-pdf-tutor-post-content {
        padding: 18px;
    }

    .ai-pdf-tutor-chat-header {
        padding: 10px 14px 6px;
        gap: 8px;
    }

    .ai-pdf-tutor-profile-card {
        padding: 0 14px 8px;
    }

    .ai-pdf-tutor-header-avatar {
        width: 38px;
        height: 38px;
    }

    .ai-pdf-tutor-chat-header h3 {
        font-size: 14px;
    }

    .ai-pdf-tutor-header-copy p {
        font-size: 11px;
    }

    .ai-pdf-tutor-header-tooltip {
        width: 200px;
        right: -12px;
    }
    
    .ai-pdf-tutor-archive {
        padding: 24px 16px;
    }
    
    .ai-pdf-tutor-archive-title {
        font-size: 28px;
    }
    
    .ai-pdf-tutor-filter-form {
        flex-direction: column;
    }
    
    .ai-pdf-tutor-filter-group {
        width: 100%;
    }
    
    .ai-pdf-tutor-select {
        width: 100%;
    }
    
    .ai-pdf-tutor-posts-grid {
        grid-template-columns: 1fr;
    }
    
    .ai-pdf-tutor-filter-btn,
    .ai-pdf-tutor-clear-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .ai-pdf-tutor-message {
        max-width: 95%;
    }
    
    .ai-pdf-tutor-chat-input-container {
        padding: 12px;
    }
    
    .ai-pdf-tutor-back-btn {
        width: 38px;
        height: 38px;
    }

    .ai-pdf-tutor-chat-header {
        align-items: stretch;
        justify-content: flex-end;
    }

    .ai-pdf-tutor-header-actions {
        margin-top: 0;
        align-self: flex-end;
    }
}

/* ==========================================================================
   PDF Loading Overlay
   ========================================================================== */

.pdf-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(82, 86, 89, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.pdf-loading-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.pdf-loading-content {
    text-align: center;
    color: #fff;
    padding: 40px;
    max-width: 320px;
}

.pdf-loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: #fff;
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: pdfSpinner 1s linear infinite;
}

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

.pdf-loading-text {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.9);
}

.pdf-loading-progress-container {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.pdf-loading-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--ai-pdf-primary), var(--ai-pdf-success));
    border-radius: 3px;
    width: 0%;
    transition: width 0.3s ease;
}

.pdf-loading-percent {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
}

/* ==========================================================================
   PDF Error Overlay
   ========================================================================== */

.pdf-error-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(82, 86, 89, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.pdf-error-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.pdf-error-content {
    text-align: center;
    color: #fff;
    padding: 40px;
    max-width: 360px;
}

.pdf-error-icon {
    color: var(--ai-pdf-error);
    margin-bottom: 16px;
}

.pdf-error-message {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 24px;
    color: rgba(255, 255, 255, 0.9);
}

.pdf-error-message small {
    display: block;
    margin-top: 8px;
    font-size: 13px;
    opacity: 0.7;
}

.pdf-retry-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    background: var(--ai-pdf-primary);
    color: #fff;
    border: none;
    border-radius: var(--ai-pdf-radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--ai-pdf-transition), transform var(--ai-pdf-transition);
}

.pdf-retry-button:hover {
    background: var(--ai-pdf-primary-hover);
    transform: scale(1.05);
}

.pdf-retry-button:active {
    transform: scale(0.98);
}