/* Modal Styles */
.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: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

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

.modal-content {
    background: var(--card-color);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-4);
    max-width: 90vw;
    max-height: 90vh;
    width: 600px;
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition);
}

.modal.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--divider-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface-color);
}

.modal-header h2 {
    margin: 0;
    color: var(--text-primary);
    font-weight: 500;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--divider-color);
    color: var(--text-primary);
}

.modal-body {
    padding: 2rem;
    max-height: 70vh;
    overflow-y: auto;
}

/* Tool Interface Styles */
.tool-interface {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.file-upload-area {
    border: 2px dashed var(--divider-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    transition: var(--transition-fast);
    cursor: pointer;
    background: var(--surface-color);
}

.file-upload-area:hover,
.file-upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(25, 118, 210, 0.05);
}

.file-upload-area.dragover {
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    transition: var(--transition-fast);
}

.file-upload-area:hover .upload-icon,
.file-upload-area.dragover .upload-icon {
    color: var(--primary-color);
    transform: scale(1.1);
}

.upload-text {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

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

.file-input {
    display: none;
}

/* File List */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--surface-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--divider-color);
    transition: var(--transition-fast);
}

.file-item:hover {
    border-color: var(--primary-light);
    transform: translateX(4px);
}

.file-icon {
    color: var(--error-color);
    font-size: 1.5rem;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.file-size {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.file-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.file-remove:hover {
    background: var(--error-color);
    color: white;
}

/* Tool Options */
.tool-options {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.option-label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.option-input {
    padding: 0.75rem;
    border: 2px solid var(--divider-color);
    border-radius: var(--border-radius);
    background: var(--card-color);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.option-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.option-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

.option-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.option-checkbox input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--primary-color);
}

.option-range {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--divider-color);
    outline: none;
    appearance: none;
}

.option-range::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-1);
}

.option-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-1);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--divider-color);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    justify-content: center;
    min-width: 120px;
}

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

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

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 2px solid var(--divider-color);
}

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

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

.btn-success:hover {
    background: #45a049;
}

.btn-danger {
    background: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background: #d32f2f;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Progress Modal */
.progress-modal .modal-content {
    width: 400px;
    text-align: center;
}

.progress-content {
    padding: 2rem;
}

.progress-icon {
    margin-bottom: 1rem;
}

.progress-spinner {
    width: 64px;
    height: 64px;
    border: 4px solid var(--divider-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--divider-color);
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-percentage {
    font-weight: 500;
    color: var(--primary-color);
    font-size: 1.125rem;
}

/* Notification System */
.notification-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 400px;
}

.notification {
    background: var(--card-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-3);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transform: translateX(100%);
    transition: var(--transition);
    border-left: 4px solid var(--info-color);
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-left-color: var(--success-color);
}

.notification.warning {
    border-left-color: var(--warning-color);
}

.notification.error {
    border-left-color: var(--error-color);
}

.notification-icon {
    font-size: 1.5rem;
    color: var(--info-color);
}

.notification.success .notification-icon {
    color: var(--success-color);
}

.notification.warning .notification-icon {
    color: var(--warning-color);
}

.notification.error .notification-icon {
    color: var(--error-color);
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.notification-message {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.notification-close:hover {
    background: var(--surface-color);
    color: var(--text-primary);
}

/* Preview Area */
.preview-area {
    border: 2px solid var(--divider-color);
    border-radius: var(--border-radius);
    background: var(--surface-color);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.preview-content {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.preview-placeholder {
    text-align: center;
    color: var(--text-secondary);
}

.preview-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

/* Help Content */
.help-content {
    line-height: 1.6;
}

.help-content h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    margin-top: 2rem;
}

.help-content h3:first-child {
    margin-top: 0;
}

.shortcuts-list {
    list-style: none;
    padding: 0;
}

.shortcuts-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--divider-color);
}

.shortcuts-list li:last-child {
    border-bottom: none;
}

kbd {
    background: var(--surface-color);
    border: 1px solid var(--divider-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-family: monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

/* Responsive Components */
@media (max-width: 768px) {
    .modal-content {
        width: 95vw;
        margin: 1rem;
    }
    
    .modal-header,
    .modal-body {
        padding: 1rem;
    }
    
    .file-upload-area {
        padding: 2rem 1rem;
    }
    
    .upload-icon {
        font-size: 2rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .notification-container {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }
    
    .notification {
        transform: translateY(-100%);
    }
    
    .notification.show {
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .file-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .file-actions {
        align-self: flex-end;
    }
    
    .tool-options {
        gap: 1rem;
    }
    
    .option-group {
        gap: 0.25rem;
    }
}

/* Accessibility Styles */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 10000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 6px;
}

/* Focus Management */
.using-mouse *:focus {
    outline: none;
}

*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.2);
}

.tool-card:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Keyboard Navigation */
.tools-grid .tool-card[tabindex="0"] {
    cursor: pointer;
}

.shortcuts-list {
    text-align: left;
}

.shortcuts-list ul {
    list-style: none;
    padding: 0;
}

.shortcuts-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.shortcuts-list li:last-child {
    border-bottom: none;
}

.shortcuts-list kbd {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: monospace;
    font-size: 0.9em;
    margin-right: 8px;
}

/* Drag and Drop Styles */
.drag-drop-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(33, 150, 243, 0.9);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.drop-content {
    text-align: center;
    color: white;
    max-width: 400px;
    padding: 40px;
}

.drop-icon {
    margin-bottom: 20px;
}

.drop-content h3 {
    margin: 0 0 10px 0;
    font-size: 24px;
    font-weight: 500;
}

.drop-content p {
    margin: 0 0 20px 0;
    opacity: 0.9;
}

.supported-formats {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.format-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
}

/* Drop Zone Styles */
.drop-zone {
    position: relative;
    transition: all 0.3s ease;
}

.drop-zone.drag-over {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.05);
    transform: scale(1.02);
}

.file-upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
    border-style: solid;
}

.file-upload-area.drag-over::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.drag-active .main-content {
    pointer-events: none;
}

/* Tool Suggestions */
.tool-suggestions {
    text-align: left;
}

.suggestions-list {
    margin: 20px 0;
}

.tool-suggestion {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tool-suggestion:hover {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.05);
}

.suggestion-content h4 {
    margin: 0 0 4px 0;
    color: var(--text-primary);
}

.suggestion-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.file-summary {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.file-summary h4 {
    margin: 0 0 10px 0;
}

.file-summary ul {
    margin: 0;
    padding-left: 20px;
}

.file-summary li {
    margin-bottom: 4px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* High Contrast Mode */
.high-contrast {
    --primary-color: #0000ff;
    --secondary-color: #800080;
    --success-color: #008000;
    --warning-color: #ff8c00;
    --error-color: #ff0000;
    --text-primary: #000000;
    --text-secondary: #333333;
    --background-color: #ffffff;
    --surface-color: #f0f0f0;
    --border-color: #000000;
}

.high-contrast .tool-card {
    border: 2px solid var(--border-color);
}

.high-contrast .btn {
    border: 2px solid var(--border-color);
    font-weight: bold;
}

.high-contrast *:focus {
    outline: 3px solid #ff0000;
    outline-offset: 2px;
}

/* Reduced Motion */
.reduced-motion * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
}

.reduced-motion .drag-drop-overlay {
    transition: none;
}

.reduced-motion .tool-card {
    transition: none;
}

.reduced-motion .notification {
    animation: none;
}

/* Batch Processing Indicators */
.batch-mode .file-upload-area {
    border-style: dashed;
    border-width: 2px;
}

.batch-mode .file-upload-area::after {
    content: 'Batch Mode: Drop multiple files';
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--primary-color);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

/* Progress Enhancements */
.progress-modal .progress-details {
    margin-top: 16px;
    padding: 12px;
    background: var(--surface-color);
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-secondary);
}

.progress-modal .progress-status {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.progress-modal .cancel-btn {
    margin-top: 16px;
    background: var(--error-color);
    color: white;
}

/* Notification Enhancements */
.notification.has-actions {
    padding-bottom: 50px;
}

.notification-actions {
    position: absolute;
    bottom: 12px;
    right: 12px;
    display: flex;
    gap: 8px;
}

.notification-actions .btn {
    padding: 4px 12px;
    font-size: 12px;
    min-height: auto;
}

.notification .progress-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 0 0 4px 4px;
    transition: width 0.3s ease;
}

/* Live Region for Screen Readers */
#live-region {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* Footer styles */
.site-footer {
  margin-top: 40px;
  background: #0f172a; /* slate-900 */
  color: #e2e8f0; /* slate-200 */
  border-top: 1px solid rgba(226, 232, 240, 0.15);
}

.site-footer .footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.footer-version {
  color: #94a3b8; /* slate-400 */
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-link {
  color: #cbd5e1; /* slate-300 */
  text-decoration: none;
  font-size: 14px;
}
.footer-link:hover,
.footer-link:focus {
  color: #ffffff;
  text-decoration: underline;
}

.footer-meta {
  text-align: right;
  font-size: 12px;
  color: #94a3b8; /* slate-400 */
}

@media (max-width: 720px) {
  .site-footer .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-meta { text-align: center; }
}