:root{font-family:Segoe UI,Microsoft YaHei,sans-serif;color:#111827;background:#f3f4f6;--primary: #2563eb;--border: #e5e7eb}@font-face{font-family:Material Icons;src:url(../fonts/material-icons.woff2) format("woff2");font-style:normal;font-weight:400;font-display:block}.material-icon{font-family:Material Icons;font-size:20px;font-weight:400;line-height:1;display:inline-block;width:20px;flex:none}*{box-sizing:border-box}body{margin:0;overflow:hidden}body>canvas{display:block;width:100%;height:100dvh;touch-action:none}button{font:inherit;color:inherit;cursor:pointer;border:0;background:transparent;min-height:44px;padding:8px 14px;border-radius:18px;transition:background .15s,color .15s}button:hover:not(:disabled){background:#f3f4f6}button:focus-visible{outline:3px solid var(--primary);outline-offset:3px}button:disabled{color:#9ca3af;cursor:default}button[aria-pressed=true]{color:var(--primary);background:#eff6ff}[hidden]{display:none!important}#hud{position:fixed;inset:0;min-height:100dvh;z-index:2;pointer-events:none;padding:max(16px,env(safe-area-inset-top)) 20px max(18px,env(safe-area-inset-bottom))}.island,.panel{pointer-events:auto;background:#fff;border:1px solid var(--border);box-shadow:0 4px 12px #00000014}.island{border-radius:22px;min-height:44px}.language{position:absolute;right:20px;top:max(16px,env(safe-area-inset-top));display:flex;padding:3px;gap:2px}.language button{min-height:36px;padding:6px 12px;font-size:13px}.panel{border-radius:16px;padding:16px}.action-area{position:absolute;top:max(16px,env(safe-area-inset-top));left:20px;display:flex;align-items:flex-start;gap:10px}.action-trigger button{display:flex;align-items:center;gap:10px;color:var(--primary);padding:0 16px;min-width:174px;height:44px;white-space:nowrap}.action-trigger{border-color:#2563eb50}.action-trigger .chevron{margin-left:auto;font-size:20px;color:#6b7280}.action-trigger button[aria-expanded=true] .chevron{transform:rotate(180deg)}.action-trigger button[aria-expanded=true]{background:#eff6ff}#current-mode{font-size:14px;font-weight:600;line-height:20px}#actions-panel{position:absolute;top:54px;left:0;width:440px;max-height:calc(100dvh - 340px);overflow-y:auto;padding:10px}.panel-heading{display:flex;justify-content:space-between;align-items:center;padding:0 6px 8px}.panel-heading strong{font-size:14px;font-weight:600}.panel-heading button{font-size:12px;min-height:32px;padding:4px 10px;border:1px solid var(--border)}.action-group+.action-group{margin-top:12px}.action-group h2{margin:0 8px 7px;font-size:12px;color:#4b5563;font-weight:500}.action-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:4px}.mode-button{display:flex;align-items:center;gap:7px;padding:10px 6px;border-radius:8px;border:1.5px solid transparent;text-align:left;font-size:14px;white-space:nowrap}html[lang=en] .mode-button{font-size:13px}.mode-button[aria-pressed=true]{border-color:#2563eb80;background:#2563eb0d;font-weight:600}.mode-button .material-icon{font-size:18px;width:18px}kbd{font-family:inherit;font-size:10px;color:#6b7280;border:1px solid var(--border);border-radius:4px;padding:1px 4px;margin-left:auto}.load-card{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:min(370px,calc(100vw - 32px));display:flex;gap:16px;align-items:center;padding:24px}.load-card.compact{top:142px;left:20px;transform:none;padding:16px;width:320px}.load-copy{flex:1;min-width:0}.load-copy strong{font-size:14px;font-weight:600}.load-copy p{font-size:12px;color:#4b5563;margin:6px 0 0;overflow-wrap:anywhere}progress{display:block;width:100%;height:4px;margin-top:14px;accent-color:var(--primary)}.spinner{width:24px;height:24px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;flex:none}.load-card.error .spinner{display:none}.load-card.error{border-color:#ef4444}#retry{color:var(--primary);padding:8px}.bottom-controls{position:absolute;left:20px;right:20px;bottom:max(18px,env(safe-area-inset-bottom));display:flex;align-items:flex-end;gap:12px}.movement{padding:10px;border-radius:20px;width:348px;max-width:100%}.utility-keys{display:grid;grid-template-columns:1fr 1fr 1.25fr 1fr;gap:6px;padding-bottom:10px;border-bottom:1px solid var(--border);margin-bottom:10px}.utility-keys button{min-height:62px;min-width:0}.utility-keys kbd{display:block;border:none;padding:0;margin:0;font-size:16px;color:inherit;line-height:22px}#reset kbd{font-size:12px}.movement-keys{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.movement button{padding:7px 4px;min-height:52px;font-size:16px;font-weight:600;touch-action:none;user-select:none;border:1px solid var(--border);border-radius:10px;background:#f9fafb}.movement button[aria-pressed=true]{background:#eff6ff;border-color:#93b4f7}.movement button:disabled{color:#6b7280;background:#f3f4f6}.movement button span{display:block;color:#374151;font-size:12px;font-weight:500;margin-top:3px;line-height:18px;white-space:nowrap}.movement button:disabled span{color:#6b7280}.utility-keys button span{white-space:normal}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:600px){#hud{padding:max(12px,env(safe-area-inset-top)) 12px}.language{right:12px;top:max(12px,env(safe-area-inset-top))}.action-area{top:max(12px,env(safe-area-inset-top));left:12px}#actions-panel{width:min(320px,calc(100vw - 24px))}.action-grid{grid-template-columns:repeat(2,1fr)}.load-card.compact{top:130px;left:12px;width:min(320px,calc(100vw - 24px))}.bottom-controls{left:12px;right:12px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}