:root{--bg:#111113;--bg-panel:#18181b;--bg-raised:#1f1f23;--bg-hover:#26262b;--border:#2b2b31;--border-strong:#3a3a42;--text:#ececf1;--text-dim:#9b9ba6;--text-faint:#5f5f6b;--accent:#f5a524;--accent-text:#16130b;--danger:#e5484d;--success:#46a758;--mono:"SF Mono", ui-monospace, Menlo, monospace;--sans:-apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif;--radius:8px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden}body{font-family:var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-webkit-user-select:none;user-select:none;font-size:13px}.app{grid-template-rows:44px 1fr;height:100%;display:grid}.titlebar{background:var(--bg-panel);border-bottom:1px solid var(--border);-webkit-app-region:drag;align-items:center;gap:16px;padding:0 16px 0 84px;display:flex}.app:not(.platform-macos) .titlebar{padding-left:16px}.titlebar>*{-webkit-app-region:no-drag}.titlebar 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button.active{background:var(--bg-raised);color:var(--accent)}.library-search{padding:12px 12px 4px}.library-grid{grid-template-columns:1fr 1fr;gap:8px;padding:8px 12px;display:grid}.library-item{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius);cursor:grab;text-align:center;flex-direction:column;align-items:center;gap:6px;padding:10px 6px;display:flex}.library-item:hover{border-color:var(--accent);background:var(--bg-hover)}.library-item.placing{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.library-item .thumb{font-size:22px;line-height:1}.library-item .name{color:var(--text-dim);font-size:11px}.rail-scene{margin-bottom:4px}.rail-scene-header{cursor:pointer;color:var(--text-dim);border-radius:6px;justify-content:space-between;align-items:center;padding:6px 8px;font-size:12px;font-weight:700;display:flex}.rail-scene-header:hover{background:var(--bg-hover);color:var(--text)}.rail-scene-header.active{color:var(--text)}.rail-shot{cursor:pointer;color:var(--text-dim);border-radius:6px;align-items:center;gap:8px;padding:6px 8px 6px 20px;font-size:12px;display:flex}.rail-shot:hover{background:var(--bg-hover);color:var(--text)}.rail-shot.active{background:var(--bg-raised);color:var(--accent);font-weight:700}.hud{border:1px solid var(--border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:5;background:#111113d1;border-radius:10px;flex-wrap:wrap;gap:2px;max-width:40%;padding:4px;display:flex;position:absolute;top:10px;left:10px}.viewport-tools{z-index:5;flex-direction:column;align-items:flex-end;gap:6px;max-width:55%;display:flex;position:absolute;top:10px;right:10px}.viewport-tools .tool-row{flex-wrap:wrap;justify-content:flex-end;gap:6px;display:flex}.viewport-tools 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16px;font-size:12px;line-height:1.4;position:absolute;bottom:14px;left:14px}.empty-state{color:var(--text-faint);pointer-events:none;z-index:4;text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:15px;display:flex;position:absolute;inset:0}.timeline{background:var(--bg-panel);border-top:1px solid var(--border);flex-direction:column;flex-shrink:0;height:240px;min-height:110px;max-height:60vh;display:flex;position:relative}.timeline-resizer{cursor:ns-resize;z-index:6;height:7px;position:absolute;top:-3px;left:0;right:0}.timeline-resizer:hover{background:var(--accent);opacity:.35}.timeline-toolbar{border-bottom:1px solid var(--border);flex-wrap:wrap;flex-shrink:0;align-items:center;gap:4px 10px;max-height:84px;padding:6px 12px;display:flex;overflow-y:auto}.timeline-time{font-family:var(--mono);color:var(--text-dim);min-width:88px;font-size:12px}.timeline-body{flex:1;position:relative;overflow-y:auto}.timeline-track{border-bottom:1px solid 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var(--border-strong);border-radius:var(--radius);font-family:var(--mono);color:var(--text-dim);white-space:pre-wrap;-webkit-user-select:text;user-select:text;max-height:260px;padding:10px;font-size:11px;line-height:1.5;overflow-y:auto}.progress-bar{background:var(--bg);border-radius:3px;height:6px;overflow:hidden}.progress-bar>div{background:var(--accent);height:100%;transition:width .15s}.toasts{z-index:100;flex-direction:column;gap:8px;display:flex;position:fixed;bottom:20px;right:20px}.toast{background:var(--bg-raised);border:1px solid var(--border-strong);border-radius:var(--radius);max-width:360px;padding:10px 14px;font-size:12px;box-shadow:0 8px 24px #0006}.toast.error{border-color:var(--danger)}.toast.success{border-color:var(--success)}.welcome{flex-direction:column;justify-content:center;align-items:center;gap:16px;height:100%;padding:24px;display:flex;overflow:auto}.welcome h1{letter-spacing:.02em;font-size:28px}.welcome p{color:var(--text-dim);text-align:center;max-width:520px;line-height:1.6}.welcome .actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.director{background:var(--bg-panel);border:1px solid var(--border);-webkit-app-region:no-drag;-webkit-user-select:text;user-select:text;border-radius:12px;flex-direction:column;gap:10px;width:min(560px,100%);padding:16px;display:flex}.director.compact{width:100%;padding:12px}.director-title{font-size:15px;font-weight:700}.director-hint{color:var(--text-dim);text-align:left;margin:0;font-size:12px;line-height:1.5}.director-input{resize:vertical;background:var(--bg);width:100%;color:var(--text);border:1px solid var(--border-strong);font-family:var(--sans);border-radius:8px;padding:10px;font-size:13px;line-height:1.5}.director-examples{flex-wrap:wrap;gap:6px;display:flex}.director-examples .chip{border:1px solid var(--border);background:var(--bg-raised);color:var(--text-dim);cursor:pointer;border-radius:999px;padding:4px 8px;font-size:11px}.director-actions{flex-wrap:wrap;gap:8px;display:flex}.director-log{color:var(--success);font-size:12px;line-height:1.45}.warning-chip{border:1px solid var(--accent);color:var(--accent);background:#f5a5241f;border-radius:6px;align-items:center;gap:6px;margin:4px 0;padding:4px 10px;font-size:11px;font-weight:600;display:inline-flex}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border-strong);border:2px solid var(--bg-panel);border-radius:5px}::-webkit-scrollbar-track{background:0 0}.timeline-field{color:var(--text-dim);align-items:center;gap:6px;margin:0;font-size:11px;font-weight:600;display:flex}.timeline-field>span{white-space:nowrap}.timeline-warnings{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:6px;max-width:60%;margin-left:auto;display:flex}.timeline-warnings .warning-chip{margin:0}.timeline-empty{color:var(--text-faint);text-align:center;pointer-events:none;justify-content:center;align-items:center;padding:0 24px;font-size:13px;display:flex;position:absolute;inset:0}.swatch{cursor:pointer;border:1px solid var(--border-strong);border-radius:5px;width:20px;height:20px;padding:0}.swatch:hover{border-color:var(--accent)}.mark-row{cursor:pointer;font-family:var(--mono);color:var(--text-dim);border-radius:6px;margin-bottom:2px;padding:6px 8px;font-size:11px}.mark-row:hover{background:var(--bg-hover);color:var(--text)}.seg.gait-grid{grid-template-columns:repeat(3,1fr);display:grid}.seg.gait-grid button{text-transform:capitalize}.rail-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.rail-label{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.rail-dur{font-family:var(--mono);color:var(--text-faint);flex-shrink:0;font-size:10px}.rail-actions{flex-shrink:0;align-items:center;gap:2px;margin-left:4px;display:none}.rail-scene-header:hover .rail-actions,.rail-shot:hover .rail-actions{display:inline-flex}.rail-btn{color:var(--text-faint);font:inherit;cursor:pointer;background:0 0;border:none;border-radius:4px;padding:2px 5px;font-size:12px;line-height:1}.rail-btn:hover{background:var(--border-strong);color:var(--text)}.rail-shot.rail-draft{color:var(--text-faint);padding-left:32px;font-size:11px}.rail-shot.rail-draft.active{color:var(--accent)}.rail-shot.rail-draft .rail-label{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.help-backdrop{z-index:200;background:#0000008c;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.help-modal{background:var(--bg-panel);border:1px solid var(--border-strong);border-radius:14px;flex-direction:column;width:min(760px,92vw);height:min(680px,88vh);display:flex;overflow:hidden;box-shadow:0 24px 80px #0000008c}.help-header{border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:14px 16px;display:flex}.help-body{-webkit-user-select:text;user-select:text;flex:1;padding:18px 22px;overflow-y:auto}.help-intro{color:var(--text-dim);margin-bottom:18px;font-size:13px;line-height:1.6}.help-group{margin-bottom:26px}.help-section-title{letter-spacing:.12em;text-transform:uppercase;color:var(--accent);border-bottom:1px solid var(--border);margin-bottom:12px;padding-bottom:6px;font-size:11px;font-weight:700}.help-step{gap:12px;margin-bottom:14px;display:flex}.help-step-num{background:var(--bg-raised);border:1px solid var(--border-strong);width:22px;height:22px;color:var(--text-dim);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-top:1px;font-size:11px;font-weight:700;display:flex}.help-step-title{margin-bottom:3px;font-size:13px;font-weight:700}.help-step-body{color:var(--text-dim);font-size:12.5px;line-height:1.65}.help-step-body b{color:var(--text)}.help-kbd{background:var(--bg);border:1px solid var(--border-strong);font-family:var(--mono);color:var(--text);border-radius:4px;padding:1px 6px;font-size:11px;display:inline-block}.help-table{border-collapse:collapse;width:100%;font-size:12.5px}.help-table td{border-bottom:1px solid var(--border);color:var(--text-dim);vertical-align:top;padding:6px 8px;line-height:1.5}.help-term{width:180px;color:var(--text);white-space:nowrap;font-weight:600}.titlebar .help-btn{border:1px solid var(--border-strong);background:var(--bg-raised);color:var(--text-dim);cursor:pointer;border-radius:50%;width:26px;height:26px;font-size:13px;font-weight:700}.titlebar .help-btn:hover{color:var(--accent);border-color:var(--accent)}.help-v4{width:min(920px,94vw);height:min(720px,90vh)}.help-v4 .help-tabs{width:340px}.help-v4-body{padding:0}.help-v4-inner{max-width:860px;margin:0 auto;padding:22px 24px 32px}.help-v4 .help-intro{margin-bottom:20px;font-size:13px}.help-cards{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;display:grid}.help-card{background:var(--bg-raised);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:6px;padding:16px 16px 14px;transition:border-color 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var(--border);margin-bottom:10px;padding-bottom:5px;font-size:10.5px;font-weight:700}.help-task{border-bottom:1px solid var(--border);padding:9px 0}.help-task:last-child{border-bottom:none}.help-task-q{color:var(--text);margin-bottom:3px;font-size:13px;font-weight:700}.help-task-a{color:var(--text-dim);font-size:12.5px;line-height:1.6}.help-task-a b{color:var(--text)}.help-kbd-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 28px;display:grid}.help-kbd-row{border-bottom:1px solid var(--border);align-items:baseline;gap:12px;padding:8px 0;display:flex}.help-kbd-keys{text-align:right;flex-shrink:0;min-width:96px}.help-kbd-sep{color:var(--text-faint);font-size:11px}.help-kbd-desc{color:var(--text-dim);font-size:12.5px;line-height:1.45}@media (width<=620px){.help-kbd-grid{grid-template-columns:1fr}}