static/style.css

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: #1a1a2e;
    color: #333;
    height: 100vh;
    overflow: hidden;
}

/* Main App Container - Two Column Layout */
.app-container {
    display: flex;
    height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Left Panel - Controls */
.left-panel {
    width: 45%;
    min-width: 500px;
    background: #f8f9fa;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}

.left-panel header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.left-panel header h1 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.subtitle {
    font-size: 0.9rem;
    opacity: 0.9;
}

.controls-section {
    padding: 20px;
    flex: 1;
}

/* Right Panel - Results & History */
.right-panel {
    flex: 1;
    background: #2d2d2d;
    color: white;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.history-header {
    background: #1a1a2e;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #444;
}

.history-header h2 {
    font-size: 1.3rem;
    color: white;
}

.history-controls {
    display: flex;
    gap: 10px;
}

.history-btn {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.history-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

/* Tabs */
.history-tabs {
    display: flex;
    background: #242438;
    border-bottom: 1px solid #444;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    background: transparent;
    color: #aaa;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.3s;
    border-bottom: 2px solid transparent;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: white;
    border-bottom-color: #764ba2;
    background: rgba(118, 75, 162, 0.1);
}

.tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

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

/* Results Grid - Large images for current generation */
.results-grid {
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
}

.results-grid .generation-item {
    width: 100%;
    max-width: 800px;
    min-height: 400px;
}

.results-grid .generation-item img {
    width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: contain;
}

/* History Grid - Smaller thumbnails */
.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
}

.history-grid .generation-item {
    max-height: 250px;
}

.history-grid .generation-item img {
    max-height: 200px;
    object-fit: cover;
}

.generation-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background: #1a1a2e;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.generation-item:hover {
    transform: scale(1.03);
    border-color: #764ba2;
    box-shadow: 0 4px 12px rgba(118, 75, 162, 0.3);
}

.generation-item img {
    width: 100%;
    height: auto;
    display: block;
}

.generation-meta {
    padding: 8px;
    background: rgba(0, 0, 0, 0.7);
    font-size: 0.75rem;
    color: #ccc;
}

.generation-meta .timestamp {
    display: block;
    margin-bottom: 4px;
}

.generation-meta .prompt-preview {
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0.8;
}

.use-as-input-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s;
}

.generation-item:hover .use-as-input-btn {
    opacity: 1;
}

.use-as-input-btn:hover {
    transform: scale(1.1);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px;
    color: #666;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #999;
}

.empty-state small {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* Generation Info */
.generation-info {
    background: #1a1a2e;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 0.85rem;
    color: #ccc;
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.card-header.clickable {
    cursor: pointer;
    user-select: none;
}

.card-header h2 {
    color: #764ba2;
    margin: 0;
    font-size: 1.2rem;
}

.card.collapsed .settings-content {
    display: none;
}

.card.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.toggle-icon {
    color: #764ba2;
    transition: transform 0.3s;
    font-size: 0.8rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: #555;
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 8px 10px;
    border: 2px solid #e1e8ed;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #764ba2;
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
}

.form-group input[type="file"] {
    padding: 8px;
    background: #f7f9fc;
    border: 2px dashed #d1d9e6;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
}

.help-text {
    display: block;
    margin-top: 4px;
    font-size: 0.75rem;
    color: #666;
}

.help-text a {
    color: #764ba2;
    text-decoration: none;
}

.help-text a:hover {
    text-decoration: underline;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

/* Image Preview */
.image-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.image-preview-item {
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    background: #f7f9fc;
    aspect-ratio: 1;
    border: 2px solid #e1e8ed;
    transition: all 0.3s ease;
}

.image-preview-item.uploading {
    border-color: #007bff;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.1);
}

.image-preview-item.uploaded {
    border-color: #28a745;
    box-shadow: 0 0 0 2px rgba(40, 167, 69, 0.1);
}

.image-preview-item.upload-failed {
    border-color: #dc3545;
    box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.1);
}

.image-preview-item:hover {
    border-color: #764ba2;
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(118, 75, 162, 0.2);
}

.image-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.image-preview-item:hover img {
    opacity: 0.95;
}

.image-preview-item .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(255, 59, 48, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: background 0.3s;
}

.image-preview-item .remove-btn:hover {
    background: rgba(255, 59, 48, 1);
    transform: scale(1.1);
}

/* Individual image upload status */
.image-upload-status {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    padding: 4px;
    font-size: 10px;
    text-align: center;
    transition: opacity 0.3s ease;
    z-index: 3;
}

.upload-progress-mini {
    height: 3px;
    background: #e9ecef;
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 2px;
}

.upload-progress-mini-bar {
    height: 100%;
    background: linear-gradient(90deg, #007bff, #0056b3);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0;
}

.uploaded .upload-progress-mini-bar {
    background: linear-gradient(90deg, #28a745, #218838);
}

.upload-failed .upload-progress-mini-bar {
    background: linear-gradient(90deg, #dc3545, #c82333);
}

.upload-status-text {
    display: block;
    color: #495057;
    font-weight: 500;
}

.uploaded .upload-status-text {
    color: #28a745;
}

.upload-failed .upload-status-text {
    color: #dc3545;
}

/* Loading Preview */
.loading-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f2f5;
    border: 2px dashed #d1d9e6;
}

.loading-placeholder {
    text-align: center;
    padding: 10px;
}

.loading-placeholder .spinner {
    width: 24px;
    height: 24px;
    margin: 0 auto 6px;
    border: 2px solid rgba(118, 75, 162, 0.2);
    border-top-color: #764ba2;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-placeholder p {
    font-size: 0.7rem;
    color: #666;
    margin: 0;
    word-break: break-all;
    max-width: 90px;
}

/* Buttons */
.generate-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(118, 75, 162, 0.3);
}

.generate-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.clear-all-btn {
    padding: 5px 10px;
    background: #ff4444;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.clear-all-btn:hover {
    background: #cc0000;
    transform: translateY(-1px);
}

/* Status Messages */
.status-message {
    margin-top: 15px;
    padding: 12px;
    border-radius: 6px;
    display: none;
    font-size: 0.85rem;
}

.status-message.info {
    background: #e3f2fd;
    color: #1565c0;
    border-left: 4px solid #1565c0;
    display: block;
}

.status-message.success {
    background: #e8f5e9;
    color: #2e7d32;
    border-left: 4px solid #2e7d32;
    display: block;
}

.status-message.error {
    background: #ffebee;
    color: #c62828;
    border-left: 4px solid #c62828;
    display: block;
}

.status-message.warning {
    background: #fff3e0;
    color: #e65100;
    border-left: 4px solid #e65100;
    display: block;
}

/* Progress Logs */
.progress-logs {
    margin-top: 10px;
    padding: 10px;
    background: #f5f7fa;
    border-radius: 6px;
    max-height: 150px;
    overflow-y: auto;
    display: none;
    font-size: 0.75rem;
}

.progress-logs.active {
    display: block;
}

.progress-logs .log-entry {
    padding: 3px 0;
    color: #666;
    border-bottom: 1px solid #e1e8ed;
}

.progress-logs .log-entry:last-child {
    border-bottom: none;
}

/* Spinner Animation */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Flash Animation */
@keyframes flash {
    0% {
        background-color: rgba(118, 75, 162, 0.1);
    }
    50% {
        background-color: rgba(118, 75, 162, 0.2);
        border-color: #764ba2;
    }
    100% {
        background-color: rgba(118, 75, 162, 0.1);
    }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .left-panel {
        width: 50%;
        min-width: 400px;
    }
}

@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
    }
    
    .left-panel {
        width: 100%;
        min-width: auto;
        height: 50vh;
        border-right: none;
        border-bottom: 2px solid #ddd;
    }
    
    .right-panel {
        height: 50vh;
    }
    
    .results-grid, .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

@media (max-width: 600px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .results-grid, .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .history-controls {
        flex-direction: column;
        gap: 5px;
    }
    
    .history-btn {
        width: 100%;
        text-align: center;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(118, 75, 162, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(118, 75, 162, 0.7);
}

/* Custom size fields visibility */
.custom-size {
    transition: all 0.3s ease;
}

/* Image Modal/Lightbox */
.image-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn 0.3s;
}

.image-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

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

.modal-content {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    animation: zoomIn 0.3s;
}

@keyframes zoomIn {
    from { transform: scale(0.8); }
    to { transform: scale(1); }
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 1001;
}

.modal-close:hover,
.modal-close:focus {
    color: #764ba2;
}

.modal-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
    background: rgba(0, 0, 0, 0.7);
    padding: 15px 25px;
    border-radius: 8px;
    max-width: 80%;
}

.modal-caption #modalCaption {
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.modal-use-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.modal-use-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(118, 75, 162, 0.5);
}

/* Make history images clickable */
.history-grid .generation-item {
    cursor: pointer;
}

.history-grid .generation-item:hover {
    transform: scale(1.05);
}
/* ============================= */
/* UI Polish: Enhanced Theming, Progress, and Interactions */
/* ============================= */

/* Theme tokens for new styles */
:root {
  --brand-primary: #7c3aed;
  --brand-secondary: #667eea;
  --brand-accent: #a78bfa;
  --brand-dark: #1a1a2e;
  --brand-muted: #2d2d2d;
  --success: #22c55e;
  --danger: #ef4444;
  --info: #0ea5e9;
  --warning: #f59e0b;
  --surface: #ffffff;
  --shadow-soft: 0 8px 20px rgba(0,0,0,0.08);
  --shadow-strong: 0 12px 30px rgba(0,0,0,0.15);
}

/* Right panel sticky header and subtle translucency */
.right-panel .history-header {
  position: sticky;
  top: 0;
  z-index: 15;
  backdrop-filter: saturate(140%) blur(8px);
  background: linear-gradient(180deg, rgba(26,26,46,0.85), rgba(26,26,46,0.65));
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

/* Cards: subtle border and elevation */
.card {
  border: 1px solid rgba(124, 58, 237, 0.10);
  box-shadow: var(--shadow-soft);
}

/* Inputs: improved focus ring and hover */
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.05s ease;
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
  border-color: var(--brand-accent);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12);
}

/* Tabs: pill-like top borders and better active state */
.history-tabs {
  padding: 4px 6px 0;
}

.tab-btn {
  border-radius: 10px 10px 0 0;
  margin: 0 6px;
  border: 1px solid transparent;
}

.tab-btn.active {
  border-color: rgba(255,255,255,0.12);
  border-bottom-color: transparent;
  box-shadow: inset 0 -2px 0 0 var(--brand-accent);
}

/* Generate button: enhanced hover/active states */
.generate-btn {
  background: linear-gradient(135deg, var(--brand-secondary) 0%, var(--brand-primary) 100%);
  box-shadow: 0 10px 24px rgba(124,58,237,0.25);
}

.generate-btn:hover {
  transform: translateY(-2px) scale(1.01);
  box-shadow: 0 14px 30px rgba(124,58,237,0.35);
}

.generate-btn:active {
  transform: translateY(0) scale(0.995);
}

/* Current results tiles: subtle border and soft hover */
.results-grid .generation-item {
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-soft);
}

.results-grid .generation-item:hover {
  box-shadow: var(--shadow-strong);
}

/* History thumbnails: refined hover */
.history-grid .generation-item {
  border: 1px solid rgba(255,255,255,0.08);
}

.history-grid .generation-item img {
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.history-grid .generation-item:hover img {
  transform: scale(1.03);
  opacity: 0.95;
}

/* Use-as-input button improved visibility */
.use-as-input-btn {
  background: linear-gradient(135deg, var(--brand-secondary), var(--brand-primary));
  box-shadow: 0 8px 18px rgba(124,58,237,0.28);
}

/* Status messages: subtle icons via border colors */
.status-message.info {
  border-left-color: var(--info);
}

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

.status-message.error {
  border-left-color: var(--danger);
}

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

/* Global upload progress container (top-level) */
.upload-progress-container {
  margin-top: 12px;
  background: rgba(55, 48, 163, 0.8); /* Deeper purple background for better contrast */
  border: 1px solid rgba(124,58,237,0.6);
  border-radius: 10px;
  padding: 10px 12px;
  box-shadow: var(--shadow-soft);
  color: white; /* Ensure text is white for readability */
}

.upload-progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.2);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.upload-progress-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--brand-secondary), var(--brand-primary));
  border-radius: 6px;
  transition: width 0.25s ease;
}

.upload-progress-fill.complete {
  background: linear-gradient(90deg, var(--success), #16a34a);
}

.upload-progress-text {
  margin-top: 8px;
  font-size: 0.85rem;
  color: white; /* Set to white explicitly */
  font-weight: 600;
}

/* Individual image upload status (mini) */
.image-upload-status {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  background: rgba(255,255,255,0.95);
  padding: 4px 6px;
  font-size: 10px;
  text-align: center;
  transition: opacity 0.3s ease;
  z-index: 3;
}

.upload-progress-mini {
  height: 3px;
  background: #e9ecef;
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 3px;
}

.upload-progress-mini-bar {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  border-radius: 2px;
  transition: width 0.25s ease;
  width: 0;
}

.image-preview-item.uploaded .upload-progress-mini-bar {
  background: linear-gradient(90deg, var(--success), #16a34a);
}

.image-preview-item.upload-failed .upload-progress-mini-bar {
  background: linear-gradient(90deg, var(--danger), #b91c1c);
}

.upload-status-text {
  display: inline-block;
  color: #495057;
  font-weight: 600;
}

.image-preview-item.uploaded .upload-status-text {
  color: #16a34a;
}

.image-preview-item.upload-failed .upload-status-text {
  color: #b91c1c;
}

/* Make remove buttons always accessible without overlapping status */
.image-preview-item .remove-btn {
  z-index: 4;
}

/* Modal: crisp border shadow and enhanced zoom */
.modal-content {
  border-radius: 12px;
  box-shadow: var(--shadow-strong);
}

/* Scroll area polish */
.right-panel {
  scrollbar-gutter: stable;
}

/* Minor polish on help links */
.help-text a {
  color: var(--brand-accent);
}