From e62b68ede69fb75331be37e7b57ef13f873ac112 Mon Sep 17 00:00:00 2001
From: Tomas Horsky <tomashorsky@kaist.ac.kr>
Date: Tue, 9 Jun 2026 16:18:37 +0900
Subject: [PATCH] small visual changes

---
 src/lib/world-map/StatsPanel.svelte | 76 ++++++++++++++++++++---------
 src/lib/world-map/WorldMap.svelte   |  2 +-
 2 files changed, 55 insertions(+), 23 deletions(-)

diff --git a/src/lib/world-map/StatsPanel.svelte b/src/lib/world-map/StatsPanel.svelte
index f96e17d..aa9050a 100644
--- a/src/lib/world-map/StatsPanel.svelte
+++ b/src/lib/world-map/StatsPanel.svelte
@@ -25,18 +25,37 @@
   let grandTotal = $derived(Object.values(continentTotals).reduce((a, b) => a + b, 0));
   let pct = $derived(grandTotal > 0 ? Math.round(total / grandTotal * 100) : 0);
 
-  let donutStyle = $derived.by(() => {
-    if (total === 0) return 'background: #e2e8f0';
+  let segments = $derived.by(() => {
+    if (total === 0) return [];
+    const segs = [];
     let deg = 0;
-    const stops = [];
     for (const cont of CONTINENTS) {
       const angle = counts[cont] / total * 360;
       if (angle > 0) {
-        stops.push(`${continentColors[cont]} ${deg}deg ${deg + angle}deg`);
+        const startDeg = deg;
+        const endDeg = deg + angle;
+        const midDeg = (startDeg + endDeg) / 2;
+        const rad = (midDeg - 90) * Math.PI / 180;
+        const sr = (startDeg - 90) * Math.PI / 180;
+        const er = (endDeg - 90) * Math.PI / 180;
+        const cx = 90, cy = 90, outerR = 65, innerR = 30;
+        const x1 = cx + outerR * Math.cos(sr);
+        const y1 = cy + outerR * Math.sin(sr);
+        const x2 = cx + outerR * Math.cos(er);
+        const y2 = cy + outerR * Math.sin(er);
+        const x3 = cx + innerR * Math.cos(er);
+        const y3 = cy + innerR * Math.sin(er);
+        const x4 = cx + innerR * Math.cos(sr);
+        const y4 = cy + innerR * Math.sin(sr);
+        const largeArc = angle > 180 ? 1 : 0;
+        const path = `M ${x1} ${y1} A ${outerR} ${outerR} 0 ${largeArc} 1 ${x2} ${y2} L ${x3} ${y3} A ${innerR} ${innerR} 0 ${largeArc} 0 ${x4} ${y4} Z`;
+        const lx = cx + 82 * Math.cos(rad);
+        const ly = cy + 82 * Math.sin(rad);
+        segs.push({ cont, color: continentColors[cont], path, lx, ly, angle });
         deg += angle;
       }
     }
-    return `background: conic-gradient(${stops.join(', ')})`;
+    return segs;
   });
 </script>
 
@@ -64,9 +83,22 @@
   {/each}
 
   <div class="donut-wrap">
-    <div class="donut" style={donutStyle}>
-      <div class="donut-hole"></div>
-    </div>
+    {#if segments.length > 0}
+      <svg viewBox="0 0 180 180" class="donut-svg">
+        {#each segments as seg}
+          <g class="seg-group">
+            <path d={seg.path} fill={seg.color} />
+            <text x={seg.lx} y={seg.ly} text-anchor="middle" dominant-baseline="middle" class="donut-label" style="font-size: {seg.angle < 20 ? 7 : 9}px">{seg.cont}</text>
+          </g>
+        {/each}
+        <circle cx="90" cy="90" r="30" fill="#f8fafc" />
+      </svg>
+    {:else}
+      <svg viewBox="0 0 180 180" class="donut-svg">
+        <circle cx="90" cy="90" r="65" fill="#e2e8f0" />
+        <circle cx="90" cy="90" r="30" fill="#f8fafc" />
+      </svg>
+    {/if}
   </div>
 
   <div class="divider"></div>
@@ -177,22 +209,22 @@
     margin: 24px 0;
   }
 
-  .donut {
-    width: 130px;
-    height: 130px;
-    border-radius: 50%;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
-    outline: 2px solid #fff;
+  .donut-svg {
+    width: 160px;
+    height: 160px;
+    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
   }
 
-  .donut-hole {
-    width: 60px;
-    height: 60px;
-    border-radius: 50%;
-    background: #f8fafc;
+  .donut-label {
+    fill: #1f2937;
+    font-weight: 600;
+    pointer-events: none;
+    opacity: 0;
+    transition: opacity 0.15s ease;
+  }
+
+  .seg-group:hover .donut-label {
+    opacity: 1;
   }
 
   .disclaimer {
diff --git a/src/lib/world-map/WorldMap.svelte b/src/lib/world-map/WorldMap.svelte
index 5cdfb52..cca1ed5 100644
--- a/src/lib/world-map/WorldMap.svelte
+++ b/src/lib/world-map/WorldMap.svelte
@@ -135,7 +135,7 @@
             .datum(d)
             .attr('cx', cx)
             .attr('cy', cy)
-            .attr('r', 3)
+            .attr('r', 2)
             .attr('fill', getSelected().has(effId(d)) ? '#22c55e' : '#ffffff')
             .attr('stroke', '#94a3b8')
             .attr('stroke-width', 0.5);