:root{--bg-deep:#050810;--bg-panel:rgba(8, 18, 32, 0.82);--border:rgba(0, 212, 255, 0.22);--accent:#00d4ff;--accent-dim:rgba(0, 212, 255, 0.45);--accent-warm:#ff6b35;--text:#e8f4fc;--text-muted:#7a9bb8;--glow:0 0 24px rgba(0, 212, 255, 0.15);--font-display:"Orbitron",sans-serif;--font-body:"Noto Sans SC",sans-serif;--panel-width:320px}*{box-sizing:border-box;margin:0;padding:0}body,html{width:100%;height:100%;overflow:hidden;font-family:var(--font-body);background:var(--bg-deep);color:var(--text)}body::before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse 80% 50% at 70% 20%,rgba(0,100,180,.12),transparent),radial-gradient(ellipse 60% 40% at 20% 80%,rgba(0,212,255,.06),transparent);pointer-events:none;z-index:0}.app{display:grid;grid-template-columns:auto 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body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background:#03070d}html.app-page-fullscreen .app{position:fixed;inset:0;z-index:2147483646;width:100vw;height:100vh;height:100dvh;display:grid;grid-template-columns:1fr!important}html.app-page-fullscreen .panel-column,html.app-page-fullscreen .panel-toggle-btn{display:none!important}.stage-corner-stack{position:absolute;right:16px;bottom:12px;z-index:22;display:flex;flex-direction:column;align-items:flex-end;gap:8px;max-width:min(92vw,400px);pointer-events:auto}.hint-bar{align-self:flex-end;padding:8px 20px;border:1px solid var(--border);border-radius:24px;background:rgba(5,15,28,.88);backdrop-filter:blur(8px);font-size:.75rem;color:var(--text-muted);white-space:nowrap}.feature-info-card{position:relative;width:min(360px,calc(100vw - 48px));padding:14px 36px 14px 14px;border:1px solid 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