style: dark stealth theme with teal/burgundy pieces and cache-busting

Darken the DaisyUI theme and game board colors for a muted, low-chroma
aesthetic. Pieces use dark teal vs burgundy for subtle contrast.
Add MD5-based cache busting to the DaisyUI stylesheet link so CSS
changes are picked up without a hard refresh.

assets/css/input.css

@@ -7,35 +7,35 @@
   default: true;
   color-scheme: light;
 
-  /* Playful & bright — warm, casual board game feel */
-  --color-base-100: oklch(98% 0.005 90);       /* warm white */
-  --color-base-200: oklch(95% 0.01 90);        /* light cream */
-  --color-base-300: oklch(90% 0.015 85);       /* warm gray border */
-  --color-base-content: oklch(25% 0.02 50);    /* dark warm text */
+  /* Muted stealth — dark, subtle chroma */
+  --color-base-100: oklch(78% 0.008 260);
+  --color-base-200: oklch(72% 0.008 260);
+  --color-base-300: oklch(64% 0.008 260);
+  --color-base-content: oklch(22% 0.01 260);
 
-  --color-primary: oklch(60% 0.22 30);         /* warm red — matches game pieces */
-  --color-primary-content: oklch(98% 0.005 90);
-  --color-secondary: oklch(82% 0.17 85);       /* golden yellow — matches game pieces */
-  --color-secondary-content: oklch(25% 0.02 50);
-  --color-accent: oklch(65% 0.19 250);         /* board blue */
-  --color-accent-content: oklch(98% 0.005 90);
-  --color-neutral: oklch(35% 0.03 260);
-  --color-neutral-content: oklch(95% 0.01 90);
+  --color-primary: oklch(38% 0.02 260);
+  --color-primary-content: oklch(90% 0.006 260);
+  --color-secondary: oklch(52% 0.015 260);
+  --color-secondary-content: oklch(22% 0.01 260);
+  --color-accent: oklch(48% 0.02 280);
+  --color-accent-content: oklch(90% 0.006 260);
+  --color-neutral: oklch(35% 0.015 260);
+  --color-neutral-content: oklch(88% 0.006 260);
 
-  --color-success: oklch(72% 0.19 155);
-  --color-success-content: oklch(20% 0.04 155);
-  --color-warning: oklch(82% 0.17 85);
-  --color-warning-content: oklch(25% 0.04 85);
-  --color-error: oklch(60% 0.22 30);
-  --color-error-content: oklch(97% 0.01 30);
-  --color-info: oklch(70% 0.15 240);
-  --color-info-content: oklch(20% 0.04 240);
+  --color-success: oklch(52% 0.02 160);
+  --color-success-content: oklch(22% 0.01 160);
+  --color-warning: oklch(58% 0.02 80);
+  --color-warning-content: oklch(28% 0.01 80);
+  --color-error: oklch(45% 0.03 20);
+  --color-error-content: oklch(90% 0.006 20);
+  --color-info: oklch(48% 0.02 250);
+  --color-info-content: oklch(22% 0.01 250);
 
   --radius-selector: 0.5rem;
   --radius-field: 0.5rem;
   --radius-box: 0.75rem;
   --border: 1px;
-  --depth: 1;
+  --depth: 0;
   --noise: 0;
 };
 
@@ -43,38 +43,38 @@
 .board {
   display: flex;
   gap: 8px;
-  background: #2563eb;
+  background: #334;
   padding: 16px;
   border-radius: 12px;
 }
 .column { display: flex; flex-direction: column; gap: 8px; padding: 4px; border-radius: 8px; }
 .column.clickable { cursor: pointer; }
-.column.clickable:hover { background: rgba(255,255,255,0.15); }
-.cell { width: 48px; height: 48px; border-radius: 50%; background: #1e40af; transition: background 0.2s; }
-.cell.red { background: #dc2626; }
-.cell.yellow { background: #facc15; }
+.column.clickable:hover { background: rgba(255,255,255,0.08); }
+.cell { width: 48px; height: 48px; border-radius: 50%; background: #556; transition: background 0.2s; }
+.cell.red { background: #4a2a3a; }
+.cell.yellow { background: #2a4545; }
 .cell.winning { animation: pulse 0.5s ease-in-out infinite alternate; }
 @keyframes pulse {
-  from { transform: scale(1); box-shadow: 0 0 10px rgba(255,255,255,0.5); }
-  to { transform: scale(1.1); box-shadow: 0 0 20px rgba(255,255,255,0.8); }
+  from { transform: scale(1); box-shadow: 0 0 4px rgba(0,0,0,0.15); }
+  to { transform: scale(1.03); box-shadow: 0 0 8px rgba(0,0,0,0.25); }
 }
-.player-chip { width: 20px; height: 20px; border-radius: 50%; background: #666; }
-.player-chip.red { background: #dc2626; }
-.player-chip.yellow { background: #facc15; }
+.player-chip { width: 20px; height: 20px; border-radius: 50%; background: #445; }
+.player-chip.red { background: #4a2a3a; }
+.player-chip.yellow { background: #2a4545; }
 
 /* Snake game */
 .snake-board {
   display: inline-grid;
   gap: 0;
-  background: #1a1a2e;
+  background: #556;
   border-radius: 8px;
   overflow: hidden;
-  border: 3px solid #333;
+  border: 3px solid #445;
 }
 .snake-row { display: contents; }
 .snake-cell {
-  background: #16213e;
-  border: 1px solid rgba(255,255,255,0.03);
+  background: #667;
+  border: 1px solid rgba(0,0,0,0.08);
 }
 .snake-cell.snake-head {
   border-radius: 4px;
@@ -85,14 +85,14 @@
   100% { transform: scale(1); }
 }
 .snake-cell.snake-food {
-  background: #ff6b6b;
+  background: #334;
   border-radius: 50%;
-  box-shadow: 0 0 6px rgba(255,107,107,0.6);
+  box-shadow: 0 0 3px rgba(0,0,0,0.2);
   animation: food-pulse 1.2s ease-in-out infinite alternate;
 }
 @keyframes food-pulse {
-  from { box-shadow: 0 0 6px rgba(255,107,107,0.4); transform: scale(0.85); }
-  to { box-shadow: 0 0 12px rgba(255,107,107,0.9); transform: scale(1); }
+  from { box-shadow: 0 0 3px rgba(0,0,0,0.1); transform: scale(0.85); }
+  to { box-shadow: 0 0 6px rgba(0,0,0,0.2); transform: scale(1); }
 }
 .snake-cell.snake-dead {
   opacity: 0.35;
@@ -100,3 +100,11 @@
   transition: opacity 400ms ease-out;
 }
 .snake-wrapper:focus { outline: none; }
+
+/* Desaturate inline-styled snake body/head colors */
+.snake-cell[style*="background"] {
+  filter: saturate(0) brightness(0.85);
+}
+.snake-cell.snake-head[style] {
+  box-shadow: none !important;
+}