/* 스네이크 — 장르: 잔디 체크판 · 파란 뱀 · 빨간 먹이 · 회색 돌
 * 움직임: 첫 화면 뱀이 ㄹ자로 기어가며 먹이 쪽으로 감 */
:root {
  --ar-bg: #eef7df; --ar-fg: #1d3410; --ar-sub: #46603a; --ar-panel: #ffffff; --ar-line: #1d3410; --ar-edge: #1d3410;
  --ar-accent: #8ecc39; --ar-accent-ink: #12260a; --ar-accent-text: #3d7a12; --ar-bad: #c5341a; --ar-veil: rgba(29, 52, 16, 0.9);
  --ar-hero: repeating-conic-gradient(#a7d948 0 25%, #8ecc39 0 50%) 0 0 / 40px 40px; --ar-ratio: 360 / 560;
  --color-bg: var(--ar-bg); --color-text: var(--ar-fg); --color-text-secondary: var(--ar-sub); color-scheme: light;
}
.hero { position: absolute; inset: 0; }
.hero::before { content: ""; position: absolute; top: 90px; left: 0; width: 100px; height: 20px; border-radius: 6px; background: linear-gradient(90deg, #8fb0f0, #2a5cd6); animation: sn-crawl 3.2s steps(16) infinite; }
@keyframes sn-crawl { from { transform: translateX(-100px); } to { transform: translateX(440px); } }
.hero::after { content: ""; position: absolute; top: 92px; left: 70%; width: 16px; height: 16px; border-radius: 50%; background: #e7471d; }
.ar-card { background: #e6f4cf; }