/* PDF Editor - PHP Version Styles */

:root {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e5e5e5;
    --text-primary: #171717;
    --text-secondary: #404040;
    --text-muted: #737373;
    --border-color: #e5e5e5;
    --accent-color: #4f46e5;
    --accent-hover: #4338ca;
    --danger-color: #dc2626;
    --danger-hover: #b91c1c;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.dark {
    --bg-primary: #171717;
    --bg-secondary: #262626;
    --bg-tertiary: #404040;
    --text-primary: #f5f5f5;
    --text-secondary: #d4d4d4;
    --text-muted: #a3a3a3;
    --border-color: #404040;
    --accent-color: #818cf8;
    --accent-hover: #6366f1;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    transition: background-color 0.3s, color 0.3s;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header Styles */
.header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 100;
    gap: 0.75rem;
    transition: background-color 0.3s, border-color 0.3s;
}

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

.app-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: none;
}

@media (min-width: 640px) {
    .app-title {
        display: block;
    }
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    background: transparent;
    border: none;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.icon-btn:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
}

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

.icon {
    width: 18px;
    height: 18px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--bg-tertiary);
    padding: 0.25rem;
    border-radius: 0.5rem;
}

.nav-control,
.zoom-control {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.page-indicator,
.zoom-indicator {
    font-size: 0.875rem;
    font-weight: 500;
    min-width: 3rem;
    text-align: center;
    color: var(--text-primary);
}

.zoom-indicator {
    min-width: 2.5rem;
}

/* Toolbar Controls */
.toolbar-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
}

@media (min-width: 640px) {
    .toolbar-controls {
        width: auto;
    }
}

.tools-group {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background-color: var(--bg-tertiary);
    padding: 0.25rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    max-width: 100%;
}

.tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    background: transparent;
    border: none;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    flex-shrink: 0;
}

.tool-btn:hover {
    background-color: rgba(255, 255, 255, 0.5);
}

.dark .tool-btn:hover {
    background-color: rgba(64, 64, 64, 0.5);
}

.tool-btn.active {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
    color: var(--accent-color);
}

.tool-btn.danger:hover {
    background-color: rgba(220, 38, 38, 0.1);
    color: var(--danger-color);
}

.dark .tool-btn.danger:hover {
    background-color: rgba(220, 38, 38, 0.2);
}

.tool-divider {
    width: 1px;
    height: 1.5rem;
    background-color: var(--border-color);
    margin: 0 0.5rem;
    flex-shrink: 0;
}

#colorPicker {
    width: 1.5rem;
    height: 1.5rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    background: transparent;
    padding: 0;
    flex-shrink: 0;
}

#brushSize {
    width: 4rem;
    height: 1.5rem;
    accent-color: var(--accent-color);
    flex-shrink: 0;
}

@media (min-width: 640px) {
    #brushSize {
        width: 6rem;
    }
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s;
    white-space: nowrap;
}

.btn span {
    display: none;
}

@media (min-width: 640px) {
    .btn span {
        display: inline;
    }
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
}

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

/* Main Container */
.main-container {
    flex: 1;
    overflow: hidden;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    touch: none;
    transition: background-color 0.3s;
}

/* Upload Section */
.upload-section {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 2rem;
}

.upload-box {
    width: 100%;
    max-width: 28rem;
}

.upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 16rem;
    border: 2px dashed var(--border-color);
    border-radius: 1rem;
    background-color: var(--bg-secondary);
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    box-shadow: var(--shadow-sm);
}

.upload-label:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-color);
}

.upload-icon {
    width: 3rem;
    height: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.upload-subtext {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Editor Section */
.editor-section {
    width: 100%;
    height: 100%;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.canvas-container {
    position: relative;
    box-shadow: var(--shadow-xl);
    border-radius: 0.5rem;
    background-color: white;
    transform-origin: center center;
    transition: transform 0.1s ease-out;
}

.canvas-container.is-dragging,
.canvas-container.is-pinning {
    transition: none;
}

#pdfCanvas,
#drawCanvas {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
}

#drawCanvas {
    touch-action: none;
    cursor: crosshair;
}

#drawCanvas.cursor-pan {
    cursor: grab;
}

#drawCanvas.cursor-panning {
    cursor: grabbing;
}

#drawCanvas.cursor-text {
    cursor: text;
}

#overlayContainer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* Overlay Elements */
.overlay-element {
    position: absolute;
    pointer-events: auto;
    border: 1px dashed transparent;
    transition: border-color 0.2s;
}

.overlay-element.selected {
    border: 1px dashed var(--accent-color);
    background-color: rgba(79, 70, 229, 0.05);
}

.overlay-element .action-bar {
    position: absolute;
    top: -2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    gap: 0.25rem;
    background-color: var(--bg-secondary);
    padding: 0.25rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    z-index: 100;
    align-items: center;
}

.overlay-element.selected .action-bar {
    display: flex;
}

/* Resize handles for interact.js */
.overlay-element.selected::after {
    content: '';
    position: absolute;
    right: -4px;
    bottom: -4px;
    width: 12px;
    height: 12px;
    background-color: var(--accent-color);
    border: 2px solid white;
    border-radius: 50%;
    cursor: se-resize;
    z-index: 100;
}

.overlay-element .action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.375rem;
    background: transparent;
    border: none;
    border-radius: 0.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.2s;
}

.overlay-element .action-btn:hover {
    background-color: var(--bg-tertiary);
}

.overlay-element .action-btn.delete:hover {
    background-color: rgba(220, 38, 38, 0.1);
    color: var(--danger-color);
}

.overlay-element .font-size-control {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0 0.5rem;
    border-left: 1px solid var(--border-color);
    margin-left: 0.25rem;
}

.overlay-element .font-size-control label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.overlay-element .font-size-control input {
    width: 3rem;
    padding: 0.25rem;
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

.overlay-text {
    width: 100%;
    height: 100%;
    padding: 2px;
    margin: 0;
    border: none;
    background: transparent;
    outline: none;
    resize: none;
    font-family: Helvetica, Arial, sans-serif;
    line-height: 1.2;
    overflow: hidden;
    cursor: text;
    pointer-events: auto;
    touch-action: none;
    position: relative;
    z-index: 10;
}

.overlay-text-edit-btn {
    position: absolute;
    bottom: -0.75rem;
    right: -0.75rem;
    display: none;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: background-color 0.2s;
}

.overlay-element.selected .overlay-text-edit-btn {
    display: flex;
}

.overlay-text-edit-btn:hover {
    background-color: var(--accent-hover);
}

.overlay-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
}

/* Modal Styles */
.modal {
    display: none !important;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex !important;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
    padding: 1.5rem;
    width: 100%;
    max-width: 28rem;
    max-height: 90vh;
    overflow: auto;
    margin: auto;
    position: relative;
}

.modal-content h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.modal-content.signature-modal {
    max-width: 42rem;
    width: 90%;
    height: 80vh;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    margin: auto;
    position: relative;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin-bottom: 0;
    font-size: 1rem;
}

.signature-canvas-container {
    flex: 1;
    background-color: var(--bg-primary);
    padding: 0.5rem;
    overflow: hidden;
}

#signatureCanvas {
    width: 100%;
    height: 100%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
    touch-action: none;
}

.signature-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.signature-controls label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

#signatureColor {
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    padding: 0;
    background: transparent;
}

.modal-content .modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border-color);
}

.modal-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.error-message {
    font-size: 0.875rem;
    color: var(--danger-color);
    margin-top: 0.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.loading-spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
    .header {
        padding: 0.5rem;
    }
    
    .editor-section {
        padding: 1rem;
    }
    
    .modal-content {
        max-height: 95vh;
    }
    
    .modal-content.signature-modal {
        height: 90vh;
    }
}

/* Resize handle styles for interact.js */
.interact-resize-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: var(--accent-color);
    border: 2px solid white;
    border-radius: 50%;
}

.interact-resize-handle.se {
    right: -5px;
    bottom: -5px;
    cursor: se-resize;
}

.interact-resize-handle.sw {
    left: -5px;
    bottom: -5px;
    cursor: sw-resize;
}

.interact-resize-handle.ne {
    right: -5px;
    top: -5px;
    cursor: ne-resize;
}

.interact-resize-handle.nw {
    left: -5px;
    top: -5px;
    cursor: nw-resize;
}