/* ============================================
   PDF Power Suite - Free Online PDF Tools
   Compress PDF | JPG to PDF | PDF to Word | Edit PDF
   GoForTool.com - iLovePDF Alternative
   ============================================ */

/* ============================================
   1. CSS CUSTOM PROPERTIES EXTENSION
   ============================================ */

:root {
    --color-pdf: #ef4444;
    --color-pdf-hover: #dc2626;
    --color-pdf-subtle: rgba(239, 68, 68, 0.08);
    --color-pdf-glow: rgba(239, 68, 68, 0.25);
    --color-word: #2563eb;
    --color-image: #8b5cf6;
}

[data-theme="dark"] {
    --color-pdf: #f87171;
    --color-pdf-hover: #fca5a5;
    --color-pdf-subtle: rgba(248, 113, 113, 0.12);
    --color-pdf-glow: rgba(248, 113, 113, 0.3);
    --color-word: #60a5fa;
    --color-image: #a78bfa;
}

/* ============================================
   2. TOOL PAGE HEADER
   ============================================ */

.tool-page-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) var(--space-6);
    position: sticky;
    top: 0;
    z-index: 100;
}

.tool-page-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tool-page-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: var(--text-lg);
}

.tool-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-pdf-subtle);
    color: var(--color-pdf);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.back-button:hover {
    background: var(--color-pdf);
    color: white;
}

/* Theme Toggle */
.theme-toggle {
    padding: var(--space-2);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-bg);
    color: var(--color-text-primary);
}

[data-theme="light"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }

/* Language Selector */
.lang-selector { position: relative; }

.lang-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: transparent;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    background: var(--color-bg);
    color: var(--color-text-primary);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-2);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    z-index: 200;
}

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

.lang-dropdown a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.lang-dropdown a:hover,
.lang-dropdown a.active {
    background: var(--color-bg);
    color: var(--color-text-primary);
}

/* ============================================
   3. AD CONTAINER
   ============================================ */

.ad-container {
    max-width: 1400px;
    margin: var(--space-4) auto;
    padding: 0 var(--space-6);
}

.ad-leaderboard { display: flex; justify-content: center; }

.ad-placeholder {
    background: var(--color-surface);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

@media (max-width: 768px) {
    .ad-leaderboard { display: none; }
}

/* ============================================
   4. TOOL PAGE MAIN CONTAINER
   ============================================ */

.tool-page-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    min-height: calc(100vh - 72px);
}

@media (max-width: 1024px) {
    .tool-page-main { padding: var(--space-6) var(--space-4); }
}

@media (max-width: 768px) {
    .tool-page-main {
        padding: var(--space-4);
        padding-bottom: calc(var(--space-16) + 60px);
    }
}

.tool-container { width: 100%; }

/* ============================================
   5. TOOL HEADER SECTION
   ============================================ */

.tool-header { margin-bottom: var(--space-6); }

.tool-header-content {
    display: flex;
    gap: var(--space-6);
    align-items: flex-start;
    margin-bottom: var(--space-5);
}

@media (max-width: 768px) {
    .tool-header-content {
        flex-direction: column;
        gap: var(--space-4);
    }
}

.tool-icon-large {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    border-radius: var(--radius-lg);
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

.tool-icon-pdf {
    background: var(--color-pdf-subtle);
    color: var(--color-pdf);
    border-color: var(--color-pdf);
}

[data-theme="dark"] .tool-icon-pdf {
    background: rgba(248, 113, 113, 0.15);
}

@media (max-width: 768px) {
    .tool-icon-large { width: 64px; height: 64px; }
}

.tool-header-info { flex: 1; }

.tool-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.025em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

@media (max-width: 768px) {
    .tool-title { font-size: var(--text-xl); }
}

.tool-subtitle {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.625;
    margin-bottom: var(--space-4);
}

@media (max-width: 768px) {
    .tool-subtitle { font-size: var(--text-sm); }
}

.tool-badges { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.badge {
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.badge-new { background: rgba(16, 185, 129, 0.15); color: var(--color-success); }
.badge-popular { background: rgba(99, 102, 241, 0.15); color: var(--color-accent); }
.badge-free { background: rgba(245, 158, 11, 0.15); color: var(--color-warning); }

/* ============================================
   6. PRIVACY BADGE
   ============================================ */

.privacy-badge {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), transparent);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-left: 4px solid var(--color-success);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.privacy-badge svg { color: var(--color-success); flex-shrink: 0; }
.privacy-badge strong { color: var(--color-text-primary); }

/* ============================================
   7. TOOL DEFINITION (AI Search Optimized)
   ============================================ */

.tool-definition {
    background: linear-gradient(135deg, var(--color-pdf-subtle), transparent);
    border-left: 4px solid var(--color-pdf);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-6);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.tool-definition strong { color: var(--color-text-primary); font-weight: 600; }

/* ============================================
   8. TOOL TABS NAVIGATION
   ============================================ */

.tool-tabs {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-2);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tool-tab {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: transparent;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
    transition: all var(--transition-fast);
    flex: 1;
    justify-content: center;
    min-width: max-content;
    border: none;
    cursor: pointer;
}

.tool-tab:hover {
    background: var(--color-bg);
    color: var(--color-text-primary);
}

.tool-tab.active {
    background: var(--color-pdf);
    color: white;
    box-shadow: var(--shadow-md);
}

.tool-tab svg { flex-shrink: 0; }

@media (max-width: 640px) {
    .tool-tabs { gap: var(--space-1); }
    .tool-tab { padding: var(--space-2) var(--space-3); font-size: var(--text-xs); }
    .tool-tab span { display: none; }
    .tool-tab svg { width: 20px; height: 20px; }
}

/* Edit PDF Page Thumbnails */
#pdf-pages-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-4);
}

.pdf-page-thumb {
    position: relative;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    cursor: move;
    transition: all var(--transition-fast);
}

.pdf-page-thumb:hover {
    border-color: var(--color-pdf);
    box-shadow: var(--shadow-md);
}

.pdf-page-thumb img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-fast);
}

.pdf-page-thumb .page-num {
    display: block;
    text-align: center;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
}

.pdf-page-thumb .page-actions {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    display: flex;
    gap: var(--space-1);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.pdf-page-thumb:hover .page-actions {
    opacity: 1;
}

.pdf-page-thumb .rotate-btn,
.pdf-page-thumb .delete-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.pdf-page-thumb .rotate-btn {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
}

.pdf-page-thumb .rotate-btn:hover {
    background: var(--color-accent);
    color: white;
}

.pdf-page-thumb .delete-btn {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

.pdf-page-thumb .delete-btn:hover {
    background: var(--color-error);
    color: white;
}

/* ============================================
   9. TOOL PANELS
   ============================================ */

.tool-panels { position: relative; }

.tool-panel { display: none; }

.tool-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   10. UPLOAD ZONE
   ============================================ */

.upload-zone {
    position: relative;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-12) var(--space-6);
    background: var(--color-surface);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: var(--space-6);
}

.upload-zone:hover,
.upload-zone:focus-within {
    border-color: var(--color-pdf);
    background: var(--color-pdf-subtle);
}

.upload-zone.drag-over {
    border-color: var(--color-pdf);
    background: var(--color-pdf-subtle);
    transform: scale(1.01);
    box-shadow: 0 0 0 4px var(--color-pdf-glow);
}

.upload-zone-content { pointer-events: none; }

.upload-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--color-pdf-subtle);
    border-radius: var(--radius-full);
    color: var(--color-pdf);
    margin-bottom: var(--space-4);
}

.pulse-animation { animation: pulse 2s ease-in-out infinite; }

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

.upload-text-main {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.upload-text-sub {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
}

.upload-hint { font-size: var(--text-xs); color: var(--color-text-muted); }

.file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* ============================================
   11. FILE LIST (Sortable Images)
   ============================================ */

.file-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.file-list:empty { display: none; }

.file-item {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: grab;
    transition: all var(--transition-fast);
}

.file-item:hover {
    border-color: var(--color-pdf);
    box-shadow: var(--shadow-md);
}

.file-item.dragging { opacity: 0.5; cursor: grabbing; }

.file-item-preview {
    aspect-ratio: 1;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.file-item-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-item-info {
    padding: var(--space-2) var(--space-3);
    border-top: 1px solid var(--color-border);
}

.file-item-name {
    font-size: var(--text-xs);
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-1);
}

.file-item-size { font-size: 10px; color: var(--color-text-muted); }

.file-item-remove {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    width: 24px;
    height: 24px;
    background: rgba(0, 0, 0, 0.6);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-fast);
}

.file-item:hover .file-item-remove { opacity: 1; }
.file-item-remove:hover { background: var(--color-error); }

.file-item-order {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    width: 24px;
    height: 24px;
    background: var(--color-pdf);
    border-radius: var(--radius-full);
    color: white;
    font-size: 11px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   12. FILE INFO CARD
   ============================================ */

.file-info-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.file-icon {
    width: 56px;
    height: 56px;
    background: var(--color-pdf-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-pdf);
    flex-shrink: 0;
}

.file-details { flex: 1; min-width: 0; }

.file-name {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-1);
}

.file-size { font-size: var(--text-sm); color: var(--color-text-secondary); }

.btn-icon {
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover { background: var(--color-bg); color: var(--color-error); }

/* ============================================
   13. OPTIONS PANEL
   ============================================ */

.options-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.options-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-5);
}

@media (max-width: 640px) {
    .options-grid { grid-template-columns: 1fr; }
}

.option-group { display: flex; flex-direction: column; gap: var(--space-2); }

.option-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* Radio Group */
.radio-group { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.radio-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.radio-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    position: relative;
    transition: all var(--transition-fast);
}

.radio-option input:checked + .radio-custom { border-color: var(--color-pdf); }

.radio-option input:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--color-pdf);
    border-radius: var(--radius-full);
}

.radio-option:hover .radio-custom { border-color: var(--color-pdf); }

/* Select Input */
.select-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    padding-right: var(--space-10);
}

.select-input:focus {
    outline: none;
    border-color: var(--color-pdf);
    box-shadow: 0 0 0 3px var(--color-pdf-glow);
}

/* Toggle Switch */
.option-toggle {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    cursor: pointer;
    padding: var(--space-3);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.option-toggle:hover { background: var(--color-bg); }

.option-toggle input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    flex-shrink: 0;
    transition: background var(--transition-fast);
}

.toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.option-toggle input:checked + .toggle-slider { background: var(--color-pdf); }
.option-toggle input:checked + .toggle-slider::after { transform: translateX(20px); }

.toggle-label { display: flex; flex-direction: column; gap: var(--space-1); }
.toggle-label strong { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-primary); }
.toggle-label small { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ============================================
   14. COMPRESSION OPTIONS
   ============================================ */

.compression-levels {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

@media (max-width: 768px) {
    .compression-levels { grid-template-columns: 1fr; }
}

.compression-option { cursor: pointer; }

.compression-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.compression-card {
    position: relative;
    padding: var(--space-5);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-fast);
}

.compression-option input:checked + .compression-card {
    border-color: var(--color-pdf);
    background: var(--color-pdf-subtle);
}

.compression-option:hover .compression-card { border-color: var(--color-pdf); }
.compression-card.recommended { border-color: var(--color-pdf); }

.recommended-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-1) var(--space-3);
    background: var(--color-pdf);
    color: white;
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.compression-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-3);
    background: var(--color-surface);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-pdf);
}

.compression-card strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.compression-card span {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.compression-ratio {
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
    font-weight: 600 !important;
    color: var(--color-success) !important;
}

/* ============================================
   15. NOTICE BOX
   ============================================ */

.notice-box {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
}

.notice-box svg { color: var(--color-info); flex-shrink: 0; margin-top: 2px; }
.notice-box p { font-size: var(--text-sm); color: var(--color-text-secondary); line-height: 1.6; }
.notice-box strong { color: var(--color-text-primary); }

/* ============================================
   16. PREVIEW GRID
   ============================================ */

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.preview-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.preview-item-image {
    aspect-ratio: 3/4;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-item-image canvas,
.preview-item-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.preview-item-footer {
    padding: var(--space-2) var(--space-3);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-align: center;
}

/* ============================================
   17. ACTION BUTTONS
   ============================================ */

.action-buttons {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
    flex-wrap: wrap;
}

@media (max-width: 480px) {
    .action-buttons { flex-direction: column; }
    .action-buttons .btn { width: 100%; justify-content: center; }
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary { background: var(--color-pdf); color: white; }
.btn-primary:hover { background: var(--color-pdf-hover); box-shadow: var(--shadow-md); }

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

.btn-secondary:hover {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-text-muted);
}

.btn-convert { padding: var(--space-4) var(--space-8); }
.btn-download { background: var(--color-success); }
.btn-download:hover { background: #059669; }

/* ============================================
   18. PROGRESS OVERLAY
   ============================================ */

.progress-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.progress-content {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: var(--shadow-xl);
}

.progress-spinner {
    width: 56px;
    height: 56px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-pdf);
    border-radius: 50%;
    margin: 0 auto var(--space-4);
    animation: spin 1s linear infinite;
}

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

.progress-text {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-3);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-pdf) 0%, #f97316 100%);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.progress-detail { font-size: var(--text-sm); color: var(--color-text-muted); }

/* ============================================
   19. RESULT SECTION
   ============================================ */

.result-section { margin-top: var(--space-6); }

.result-card {
    padding: var(--space-8);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.result-card.success {
    border-color: var(--color-success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), transparent);
}

.result-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-4);
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-success);
}

.result-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.result-info {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.result-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--color-bg);
    border-radius: var(--radius-md);
}

.result-stat { text-align: center; }

.result-stat-value {
    font-size: var(--text-2xl);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-text-primary);
}

.result-stat-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* ============================================
   20. SEO CONTENT SECTION
   ============================================ */

.seo-content {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.seo-content h2 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    margin-top: var(--space-8);
}

.seo-content h2:first-child { margin-top: 0; }

.seo-content p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-4);
}

.seo-content ul {
    margin: var(--space-4) 0;
    padding-left: var(--space-6);
}

.seo-content li {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-2);
}

.seo-content strong { color: var(--color-text-primary); font-weight: 600; }

/* ============================================
   21. FAQ SECTION
   ============================================ */

.faq-section {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.faq-section h2 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
}

.faq-list { display: flex; flex-direction: column; gap: var(--space-3); }

.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text-primary);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-fast);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    font-size: var(--text-xl);
    font-weight: 400;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { background: var(--color-bg); }

.faq-item p {
    padding: 0 var(--space-5) var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   22. RELATED TOOLS SECTION
   ============================================ */

.related-tools-section {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.related-tools-section h2 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.related-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
}

.related-tool-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    text-decoration: none;
    transition: all var(--transition-fast);
    display: block;
}

.related-tool-card:hover {
    border-color: var(--color-pdf);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.related-tool-card h3 {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.related-tool-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

/* ============================================
   23. LAST UPDATED
   ============================================ */

.last-updated {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-6);
    padding: var(--space-2) var(--space-3);
    background: var(--color-pdf-subtle);
    border-radius: var(--radius-md);
}

.last-updated svg { color: var(--color-pdf); }

/* ============================================
   24. FOOTER (Aligned with Main Site)
   ============================================ */

/* Footer styles inherit from style.css - only PDF-specific overrides here */

.footer-list a:hover {
    color: var(--color-pdf);
}

.social-link:hover {
    background: var(--color-pdf-subtle);
    color: var(--color-pdf);
}

/* ============================================
   25. TOAST NOTIFICATION
   ============================================ */

.toast {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text-primary);
    color: var(--color-bg);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast.success { background: var(--color-success); color: white; }
.toast.error { background: var(--color-error); color: white; }

@media (max-width: 768px) {
    .toast {
        bottom: calc(var(--space-6) + 60px);
        width: calc(100% - var(--space-8));
        justify-content: center;
    }
}

/* ============================================
   26. UTILITY CLASSES
   ============================================ */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.desktop-only { display: inline; }

@media (max-width: 768px) {
    .desktop-only { display: none !important; }
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-pdf);
    color: white;
    padding: var(--space-2) var(--space-4);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus { top: 0; }

/* ============================================
   27. DARK MODE ADJUSTMENTS
   ============================================ */

[data-theme="dark"] .upload-zone { background: var(--color-surface-elevated); }
[data-theme="dark"] .upload-zone:hover,
[data-theme="dark"] .upload-zone:focus-within { background: rgba(248, 113, 113, 0.08); }
[data-theme="dark"] .compression-card { background: var(--color-surface-elevated); }
[data-theme="dark"] .compression-option input:checked + .compression-card { background: rgba(248, 113, 113, 0.1); }
[data-theme="dark"] .faq-item { background: var(--color-surface-elevated); }
[data-theme="dark"] .related-tool-card { background: var(--color-surface-elevated); }
[data-theme="dark"] .result-card { background: var(--color-surface-elevated); }
[data-theme="dark"] .progress-content { background: var(--color-surface-elevated); }