preview zoom

frontend/src/styles.css

@@ -215,6 +215,92 @@ button.danger:hover:not([disabled]) {
   background: var(--sidebar-hover-bg);
 }
 
+.preview-zoom-backdrop {
+  position: fixed;
+  inset: 0;
+  background: var(--overlay-backdrop);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 2rem;
+  z-index: 3000;
+  cursor: zoom-out;
+}
+
+.preview-zoom__stage {
+  position: relative;
+  display: inline-flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 1.25rem;
+  max-width: 95vw;
+  max-height: 95vh;
+}
+
+.preview-zoom__image {
+  max-width: 95vw;
+  max-height: 95vh;
+  width: auto;
+  height: auto;
+  border-radius: 0;
+  box-shadow: 0 32px 120px rgba(15, 23, 42, 0.55);
+  cursor: inherit;
+}
+
+.preview-zoom__nav {
+  position: absolute;
+  bottom: 1em;
+  left: 50%;
+  transform: translateX(-50%);
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.9rem;
+  opacity: 0;
+  transition: opacity 0.18s ease;
+}
+
+.preview-zoom__stage:hover .preview-zoom__nav,
+.preview-zoom__stage:focus-within .preview-zoom__nav {
+  opacity: 1;
+}
+
+.preview-zoom__nav-button {
+  width: 2.8rem;
+  height: 2.8rem;
+  border: none;
+  border-radius: 999px;
+  background: rgba(0, 0, 0, 0.62);
+  color: #fff;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  z-index: 1;
+  transition: background 0.15s ease, transform 0.15s ease;
+  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.28);
+}
+
+.preview-zoom__nav-button:hover {
+  background: rgba(0, 0, 0, 0.82);
+}
+
+.preview-zoom__nav-button:focus-visible {
+  outline: 2px solid var(--accent, #4f46e5);
+  outline-offset: 3px;
+}
+
+.preview-zoom__nav-button svg {
+  width: 1.5rem;
+  height: 1.5rem;
+}
+
+.preview-zoom__nav-button[disabled] {
+  opacity: 0.35;
+  cursor: default;
+}
+
 .with-icon {
   display: inline-flex;
   align-items: center;