:root{--bg: #0b0d12;--card: #151922;--line: #262c38;--fg: #e8ecf4;--muted: #98a2b8;--accent: #5b7cfa;--warn: #f0b429}*{box-sizing:border-box}html,body{height:100%;margin:0}body{display:grid;place-items:center;padding:max(24px,env(safe-area-inset-top)) 20px max(24px,env(safe-area-inset-bottom));background:radial-gradient(120% 90% at 50% 0%,#1a2030 0%,var(--bg) 60%);color:var(--fg);font:16px/1.55 -apple-system,BlinkMacSystemFont,Pretendard,Apple SD Gothic Neo,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased}.card{width:100%;max-width:380px;padding:28px 24px 20px;border:1px solid var(--line);border-radius:20px;background:var(--card);text-align:center}.logo{border-radius:18px;margin-bottom:14px}h1{margin:0;font-size:22px;letter-spacing:-.01em}.sub{margin:4px 0 22px;color:var(--muted);font-size:14px}.actions{display:grid;gap:10px}.btn{padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:#1d222d;color:var(--fg);font:inherit;font-weight:600;cursor:pointer;-webkit-tap-highlight-color:transparent}.btn:active{transform:scale(.985)}.btn-primary{border-color:transparent;background:var(--accent);color:#fff}.installbar{position:fixed;right:0;bottom:0;left:0;z-index:10;display:flex;gap:12px;align-items:center;padding:12px 16px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:#151922eb;backdrop-filter:blur(12px)}.installbar-icon{flex:none;border-radius:10px}.installbar-text{display:grid;gap:2px;min-width:0;text-align:left}.installbar-text strong{font-size:14px;font-weight:600}.installbar-subline{display:flex;gap:5px;align-items:center;color:var(--muted);font-size:12px;line-height:1.4}.installbar-glyph{flex:none;width:15px;height:15px}.installbar-action{display:flex;flex:none;gap:6px;align-items:center;margin-left:auto;padding:9px 16px;border:0;border-radius:999px;background:var(--accent);color:#fff;font:inherit;font-size:14px;font-weight:600;cursor:pointer;-webkit-tap-highlight-color:transparent}.installbar-action .installbar-glyph{width:16px;height:16px}.installbar-action:active{transform:scale(.97)}body:has(.installbar:not([hidden])){padding-bottom:110px}@media(display-mode:standalone),(display-mode:fullscreen),(display-mode:minimal-ui){.installbar{display:none}}.status{min-height:1.2em;margin:16px 0 0;color:var(--muted);font-size:13px}.status.warn{color:var(--warn)}.help{margin-top:18px;text-align:left;color:var(--muted);font-size:13px}.help summary{cursor:pointer;text-align:center;list-style:none}.help summary::-webkit-details-marker{display:none}.help ol{margin:10px 0 0;padding-left:18px}.help li+li{margin-top:6px}.foot{margin-top:18px}.linkish{border:0;background:none;color:var(--muted);font:inherit;font-size:13px;text-decoration:underline;cursor:pointer}