Add camera rotation controls to index.html and update styles in style.css

- Introduced a new camera rotation control section in index.html with clockwise and counterclockwise buttons.
- Updated styles in style.css for the new camera rotation controls, enhancing layout and button design for improved usability.

index.html

@@ -50,6 +50,10 @@
 
       <div id="canvas-wrap">
         <svg id="c"></svg>
+        <div class="dir-bar" role="group" aria-label="Camera rotation direction">
+          <button type="button" class="dir-btn" id="dir-cw">↻ CW</button>
+          <button type="button" class="dir-btn" id="dir-ccw">↺ CCW</button>
+        </div>
         <div class="zoom-bar">
           <button type="button" class="zoom-btn" id="zoom-out" aria-label="Zoom out">−</button>
           <span id="zoom-label" class="zoom-label">100%</span>
@@ -125,13 +129,6 @@
               <label for="input-front-arc">Front arc <span id="val-front-arc">180</span>°</label>
               <input id="input-front-arc" type="range" min="10" max="350" step="5" value="180" />
             </div>
-            <div class="ctrl">
-              <label>Rotation</label>
-              <div class="dir-toggle">
-                <button type="button" class="dir-btn" id="dir-cw">↻ CW</button>
-                <button type="button" class="dir-btn" id="dir-ccw">↺ CCW</button>
-              </div>
-            </div>
           </div>
         </div>
 

style.css

@@ -503,32 +503,43 @@ input[type='range']::-moz-range-thumb {
   border-color: rgba(0, 0, 0, 0.18);
 }
 
-/* Direction toggle (panel only; no on-map indicator) */
-.dir-toggle {
+/* Camera rotation — overlay (pairs with .zoom-bar on the right) */
+.dir-bar {
+  position: absolute;
+  bottom: var(--sp-m);
+  left: var(--sp-m);
   display: flex;
-  gap: var(--sp-xs);
-  margin-top: var(--sp-xs);
+  align-items: center;
+  gap: var(--sp-s);
+  z-index: 10;
 }
 
 .dir-btn {
-  flex: 1;
-  height: 46px;
-  background: var(--surface-4);
+  flex: 0 0 auto;
+  box-sizing: border-box;
+  min-width: 5.25rem;
+  height: 52px;
+  padding: 0 var(--sp-m);
+  background: var(--surface-3);
   border: 1px solid rgba(255, 255, 255, 0.1);
-  border-radius: var(--radious-s);
-  color: var(--content-lo);
+  border-radius: var(--radious-m);
+  color: var(--content-mid);
   font-family: var(--font);
   font-size: 16px;
   font-weight: 500;
   letter-spacing: 0.015em;
   cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
   text-align: center;
   text-transform: uppercase;
   transition: background 0.2s ease-in-out, color 0.2s ease-in-out, border-color 0.2s ease-in-out;
+  line-height: 1;
 }
 
 .dir-btn:hover {
-  background: var(--surface-5);
+  background: var(--surface-4);
   color: var(--content-hi);
 }