/* PDF Editor Styles */
:root {
    --primary-color: #ff4757;
    --primary-dark: #e73c5e;
    --secondary-color: #2f3542;
    --text-primary: #2f3542;
    --text-secondary: #747d8c;
    --text-light: #a4b0be;
    --bg-primary: #ffffff;
    --bg-secondary: #f1f2f6;
    --bg-dark: #2f3542;
    --border-color: #dfe4ea;
    --shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 30px rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #ff4757 0%, #ff6b7a 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

/* Header */
.editor-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    position: relative;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.brand {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.brand i {
    margin-right: 0.5rem;
    font-size: 1.5rem;
}

.document-name {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.header-center {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.page-controls, .zoom-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-info, .zoom-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 60px;
    text-align: center;
}

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

/* Buttons */
.btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    background: var(--bg-secondary);
}

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

.btn-primary {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.btn-primary:hover {
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

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

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Editor Container */
.editor-container {
    display: flex;
    height: calc(100vh - 60px);
}

/* Sidebars */
.sidebar {
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    width: 250px;
    display: flex;
    flex-direction: column;
}

.left-sidebar {
    border-right: 1px solid var(--border-color);
}

.right-sidebar {
    border-left: 1px solid var(--border-color);
    border-right: none;
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.sidebar-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

/* Page Thumbnails */
.page-thumbnails {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.page-thumbnail {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    background: white;
}

.page-thumbnail:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.page-thumbnail.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.2);
}

.page-thumbnail canvas {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.page-number {
    position: absolute;
    bottom: 0.25rem;
    right: 0.25rem;
    background: var(--text-primary);
    color: white;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

/* Main Editor */
.editor-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Toolbar */
.toolbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem;
    display: flex;
    gap: 1rem;
    align-items: center;
    overflow-x: auto;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding-right: 1rem;
    border-right: 1px solid var(--border-color);
}

.tool-group:last-child {
    border-right: none;
}

.tool-btn {
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
}

.tool-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
}

.tool-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* PDF Container */
.pdf-container {
    flex: 1;
    overflow: auto;
    padding: 2rem;
    background: var(--bg-secondary);
    display: flex;
    justify-content: center;
}

.pdf-viewer {
    position: relative;
    background: white;
    box-shadow: var(--shadow);
    border-radius: 8px;
    overflow: hidden;
}

#pdf-canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

.annotation-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.annotation-layer.active {
    pointer-events: all;
    cursor: crosshair;
}

/* Draggable Elements */
.draggable {
    position: absolute;
    cursor: move;
    user-select: none;
    z-index: 10;
}

.text-element {
    background: transparent;
    border: 1px dashed transparent;
    padding: 4px;
    min-width: 50px;
    min-height: 20px;
}

.text-element:focus {
    outline: 2px solid var(--primary-color);
    border-color: var(--primary-color);
}

.image-element {
    border: 1px dashed transparent;
}

.signature-element {
    border: 1px dashed transparent;
}

.draggable.selected {
    border-color: var(--primary-color) !important;
}

.resize-handle {
    position: absolute;
    background: var(--primary-color);
    border: 1px solid white;
    width: 8px;
    height: 8px;
    z-index: 11;
}

.resize-handle.nw { top: -4px; left: -4px; cursor: nw-resize; }
.resize-handle.ne { top: -4px; right: -4px; cursor: ne-resize; }
.resize-handle.sw { bottom: -4px; left: -4px; cursor: sw-resize; }
.resize-handle.se { bottom: -4px; right: -4px; cursor: se-resize; }
.resize-handle.n { top: -4px; left: 50%; margin-left: -4px; cursor: n-resize; }
.resize-handle.s { bottom: -4px; left: 50%; margin-left: -4px; cursor: s-resize; }
.resize-handle.w { left: -4px; top: 50%; margin-top: -4px; cursor: w-resize; }
.resize-handle.e { right: -4px; top: 50%; margin-top: -4px; cursor: e-resize; }

/* Properties Panel */
.no-selection {
    text-align: center;
    color: var(--text-light);
    font-style: italic;
    margin-top: 2rem;
}

.property-group {
    margin-bottom: 2rem;
}

.property-group h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.property-control {
    margin-bottom: 1rem;
}

.property-control label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.property-control input,
.property-control select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.85rem;
    background: var(--bg-primary);
}

.property-control input:focus,
.property-control select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(255, 71, 87, 0.2);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-primary);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-hover);
}

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

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s ease;
}

.close-modal:hover {
    background: var(--bg-secondary);
}

.modal-body {
    padding: 1.5rem;
    flex: 1;
    overflow-y: auto;
}

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

/* Tab Container */
.tab-container {
    margin-bottom: 2rem;
}

.tab-buttons {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    background: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* Signature Canvas */
#signature-canvas {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: crosshair;
    background: white;
    width: 100%;
    height: 150px;
}

.signature-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
}

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

.color-picker input[type="color"] {
    width: 40px;
    height: 30px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    background: var(--bg-primary);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.1);
}

/* Signature Preview */
.signature-preview {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
    text-align: center;
    font-size: 1.5rem;
    font-family: 'Dancing Script', cursive;
    background: white;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Upload Signature */
.upload-signature {
    text-align: center;
    padding: 2rem;
}

.upload-label {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-label:hover {
    border-color: var(--primary-color);
    background: rgba(255, 71, 87, 0.05);
}

.upload-label i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: block;
}

/* Convert Options */
.convert-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.convert-option {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.convert-option:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.convert-option.selected {
    border-color: var(--primary-color);
    background: rgba(255, 71, 87, 0.1);
}

.convert-option i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: block;
}

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

/* Checkbox Group */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
}

.checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 3px;
    appearance: none;
    cursor: pointer;
    position: relative;
    background: var(--bg-primary);
}

.checkbox input[type="checkbox"]:checked {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}

.loading-content {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-hover);
}

.loading-content i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.loading-content p {
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .editor-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 200px;
    }
    
    .left-sidebar {
        order: 1;
    }
    
    .editor-main {
        order: 2;
        flex: 1;
    }
    
    .right-sidebar {
        order: 3;
    }
    
    .header-center {
        display: none;
    }
    
    .toolbar {
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .toolbar::-webkit-scrollbar {
        display: none;
    }
    
    .modal-content {
        width: 95%;
    }
}

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

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

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}