:root{--bg: #10141a;--panel: #161c24;--panel-2: #1b222c;--line: #232b36;--text: #e7eef5;--muted: #8b9aab;--accent: #4aa8ff;--rx: #3ddc84;--tx: #ff9f1c;--warn: #e8b931;--alert: #e5484d;--radius: 10px;--gap: 12px;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:IBM Plex Sans Thai,Noto Sans Thai,system-ui,-apple-system,Segoe UI,sans-serif;font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;min-height:100%}.app--stale .grid{filter:grayscale(.85) brightness(.7)}.hdr{display:flex;align-items:center;gap:var(--gap);padding:10px 16px;border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap}.hdr__title h1{font-size:17px;margin:0;letter-spacing:.2px}.hdr__title p{margin:0;font-size:12px;color:var(--muted)}.hdr__beat{display:flex;align-items:center;gap:7px;margin-left:auto;font-size:12px;color:var(--muted)}.beat{width:9px;height:9px;border-radius:50%;display:inline-block}.beat--ok{background:var(--rx);box-shadow:0 0 8px var(--rx);animation:pulse 2s ease-in-out infinite}.beat--warn{background:var(--warn)}.beat--lost{background:var(--alert);box-shadow:0 0 8px var(--alert)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.35}}.hdr__clocks{display:flex;gap:14px;font-variant-numeric:tabular-nums}.hdr__clocks>div{display:flex;flex-direction:column;align-items:flex-end}.clock__label{font-size:10px;color:var(--muted);letter-spacing:.1em}.clock__time{font-size:18px;font-weight:600}.btn{background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:var(--radius);padding:7px 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