style: Command-Palette-Overlay in @layer components

src/css/main.css

@@ -2354,6 +2354,78 @@ body.show-desc .bm-desc { display: block; }
 .settings-section.open .section-content {
   max-height: 800px;
 }
+  /* ---- COMMAND-PALETTE (Strg+K) ---- */
+  /* .palette-overlay erbt .dialog-overlay (Position/Backdrop/Fade/z-index:400). */
+  .palette-overlay {
+    align-items: flex-start;
+  }
+  .palette-box {
+    margin-top: 12vh;
+    width: 560px; max-width: 92vw;
+    background: rgba(10,9,20,0.98);
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+    backdrop-filter: blur(28px);
+    box-shadow: 0 20px 60px rgba(0,0,0,0.7);
+    transform: translateY(8px) scale(0.98);
+    transition: transform 0.2s;
+    overflow: hidden;
+  }
+  .dialog-overlay.active .palette-box { transform: translateY(0) scale(1); }
+  .palette-input {
+    width: 100%;
+    box-sizing: border-box;
+    padding: 16px 18px;
+    background: transparent;
+    border: none;
+    border-bottom: 1px solid var(--border);
+    color: var(--text-primary);
+    font-family: var(--font-body);
+    font-size: 15px;
+    outline: none;
+  }
+  .palette-input::placeholder { color: var(--text-muted); }
+  .palette-list {
+    list-style: none;
+    margin: 0; padding: 6px;
+    max-height: 46vh;
+    overflow-y: auto;
+  }
+  .palette-option {
+    display: flex; flex-direction: column; gap: 2px;
+    padding: 9px 12px;
+    border-radius: var(--radius-sm);
+    cursor: pointer;
+  }
+  .palette-option[aria-selected="true"] {
+    background: var(--accent-dim);
+  }
+  .palette-option-title {
+    color: var(--text-primary);
+    font-size: 13px; font-weight: 500;
+  }
+  .palette-option-meta {
+    color: var(--text-muted);
+    font-size: 10px; letter-spacing: 0.3px;
+  }
+  .palette-empty {
+    list-style: none;
+    padding: 16px 12px;
+    color: var(--text-muted);
+    font-size: 13px; text-align: center;
+  }
+  .palette-live {
+    position: absolute;
+    width: 1px; height: 1px;
+    overflow: hidden; clip: rect(0 0 0 0);
+    white-space: nowrap;
+  }
+  .palette-hint {
+    padding: 8px 14px;
+    border-top: 1px solid var(--border);
+    color: var(--text-muted);
+    font-size: 10px; letter-spacing: 0.3px;
+  }
 }
 
 /* ============================================