refactor(css): maximize usage of variables (1st part, to simplify CSS & style)

note: there is still work to do, but has there are risks to conflict I prefer to commit this first part now

static/css/views/inlineViewer.css

@@ -7,7 +7,7 @@
     width: 100%;
     height: 100%;
     z-index: 9999;
-    background-color: rgba(0, 0, 0, 0.85);
+    background-color: var(--color-overlay-heavy);
     display: none;
     opacity: 0;
     transition: opacity 0.3s ease;
@@ -26,12 +26,12 @@
     width: 90%;
     height: 90%;
     max-width: 1200px;
-    background-color: #fff;
+    background-color: var(--color-bg-surface);
     border-radius: 8px;
     overflow: hidden;
     display: flex;
     flex-direction: column;
-    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
+    box-shadow: 0 4px 20px var(--color-shadow-3xl);
 }
 
 .inline-viewer-header {
@@ -39,14 +39,14 @@
     justify-content: space-between;
     align-items: center;
     padding: 12px 16px;
-    background-color: #f8f9fa;
-    border-bottom: 1px solid #e2e8f0;
+    background-color: var(--color-bg-subtle);
+    border-bottom: 1px solid var(--color-border);
 }
 
 .inline-viewer-title {
     font-size: 18px;
     font-weight: 500;
-    color: #2d3748;
+    color: var(--color-text);
     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;
@@ -57,7 +57,7 @@
     border: none;
     font-size: 18px;
     cursor: pointer;
-    color: #718096;
+    color: var(--color-text-muted);
     width: 36px;
     height: 36px;
     border-radius: 50%;
@@ -68,14 +68,14 @@
 }
 
 .inline-viewer-close:hover {
-    background-color: #e2e8f0;
-    color: #4a5568;
+    background-color: var(--color-border);
+    color: var(--color-text-secondary);
 }
 
 .inline-viewer-container {
     flex-grow: 1;
     overflow: auto;
-    background-color: #f0f3f7;
+    background-color: var(--color-bg-muted);
     display: flex;
     align-items: center;
     justify-content: center;
@@ -87,13 +87,13 @@
     justify-content: space-between;
     align-items: center;
     padding: 12px 16px;
-    background-color: #f8f9fa;
-    border-top: 1px solid #e2e8f0;
+    background-color: var(--color-bg-subtle);
+    border-top: 1px solid var(--color-border);
 }
 
 .inline-viewer-download {
-    background-color: #ff5e3a;
-    color: white;
+    background-color: var(--color-accent);
+    color: var(--color-danger-text);
     border: none;
     border-radius: 4px;
     padding: 8px 16px;
@@ -107,7 +107,7 @@
 }
 
 .inline-viewer-download:hover {
-    background-color: #e74c3c;
+    background-color: var(--color-danger-alt);
 }
 
 .inline-viewer-controls {
@@ -116,8 +116,8 @@
 }
 
 .inline-viewer-controls button {
-    background-color: #f1f5f9;
-    border: 1px solid #cbd5e1;
+    background-color: var(--color-border-light);
+    border: 1px solid var(--color-border-medium);
     border-radius: 4px;
     width: 36px;
     height: 36px;
@@ -125,13 +125,13 @@
     align-items: center;
     justify-content: center;
     cursor: pointer;
-    color: #64748b;
+    color: var(--color-text-subtle);
     transition: all 0.2s;
 }
 
 .inline-viewer-controls button:hover {
-    background-color: #e2e8f0;
-    color: #334155;
+    background-color: var(--color-border);
+    color: var(--color-text-dark);
 }
 
 /* Image viewer */
@@ -168,7 +168,7 @@
     left: 50%;
     transform: translate(-50%, -50%);
     font-size: 36px;
-    color: #64748b;
+    color: var(--color-text-subtle);
 }
 
 /* Download progress container */
@@ -178,16 +178,16 @@
     align-items: center;
     gap: 12px;
     padding: 20px;
-    background: rgba(255, 255, 255, 0.95);
+    background: var(--color-progress-overlay);
     border-radius: 8px;
-    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
+    box-shadow: 0 2px 8px var(--color-shadow);
 }
 
 /* Progress bar track */
 .inline-viewer-progress-bar {
     width: 200px;
     height: 8px;
-    background: #e2e8f0;
+    background: var(--color-border);
     border-radius: 4px;
     overflow: hidden;
 }
@@ -195,7 +195,7 @@
 /* Progress bar fill */
 .inline-viewer-progress-fill {
     height: 100%;
-    background: linear-gradient(90deg, #3b82f6, #60a5fa);
+    background: linear-gradient(90deg, var(--color-info-blue), var(--color-admin-blue));
     border-radius: 4px;
     transition: width 0.2s ease;
 }
@@ -204,23 +204,10 @@
 .inline-viewer-progress-text {
     font-size: 14px;
     font-weight: 600;
-    color: #475569;
+    color: var(--color-text-secondary);
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
 }
 
-/* Dark theme support */
-[data-theme="dark"] .inline-viewer-progress {
-    background: rgba(30, 41, 59, 0.95);
-}
-
-[data-theme="dark"] .inline-viewer-progress-bar {
-    background: #334155;
-}
-
-[data-theme="dark"] .inline-viewer-progress-text {
-    color: #cbd5e1;
-}
-
 /* Error and unsupported message */
 .inline-viewer-message {
     padding: 32px;
@@ -230,12 +217,12 @@
 
 .inline-viewer-icon {
     font-size: 64px;
-    color: #cbd5e1;
+    color: var(--color-text-dark);
     margin-bottom: 24px;
 }
 
 .inline-viewer-text {
-    color: #64748b;
+    color: var(--color-text-subtle);
     line-height: 1.6;
 }
 
@@ -252,8 +239,8 @@
     font-family: "Courier New", Consolas, Monaco, monospace;
     font-size: 14px;
     line-height: 1.6;
-    color: #2d3748;
-    background-color: #fff;
+    color: var(--color-text);
+    background-color: var(--color-bg-surface);
     overflow: auto;
     white-space: pre-wrap;
     word-wrap: break-word;
@@ -268,7 +255,7 @@
     max-height: 100%;
     object-fit: contain;
     border-radius: 4px;
-    background-color: #000;
+    background-color: var(--color-black);
 }
 
 /* Audio viewer */
@@ -285,7 +272,7 @@
 
 .inline-viewer-audio-icon {
     font-size: 80px;
-    color: #94a3b8;
+    color: var(--color-text-faint);
     animation: audio-pulse 2s ease-in-out infinite;
 }
 
@@ -304,7 +291,7 @@
 .inline-viewer-audio-name {
     font-size: 16px;
     font-weight: 500;
-    color: #475569;
+    color: var(--color-text-secondary);
     text-align: center;
     word-break: break-word;
     max-width: 100%;