improve logo and icon

assets/icon-dark.svg

@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <style>
+    .icon-text {
+      font-family: 'Space Grotesk', system-ui, sans-serif;
+      font-weight: 700;
+      font-size: 28px;
+    }
+  </style>
+  <text x="6" y="26" fill="#10B981" class="icon-text">d</text>
+</svg>

assets/icon-light.svg

@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <style>
+    .icon-text {
+      font-family: 'Space Grotesk', system-ui, sans-serif;
+      font-weight: 700;
+      font-size: 28px;
+    }
+  </style>
+  <text x="6" y="26" fill="#059669" class="icon-text">d</text>
+</svg>

assets/logo-dark.svg

@@ -7,6 +7,6 @@
     }
   </style>
   <text x="4" y="24" class="logo-text">
-    <tspan fill="#F0F0F0">d</tspan><tspan fill="#AAAAAA">gray</tspan>
+    <tspan fill="#10B981">d</tspan><tspan fill="#AAAAAA">gray</tspan>
   </text>
 </svg>

assets/logo-light.svg

@@ -7,6 +7,6 @@
     }
   </style>
   <text x="4" y="24" class="logo-text">
-    <tspan fill="#1A1A1A">d</tspan><tspan fill="#555555">gray</tspan>
+    <tspan fill="#059669">d</tspan><tspan fill="#555555">gray</tspan>
   </text>
 </svg>