*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--primary: #2563eb;--primary-hover: #1d4ed8;--primary-light: #dbeafe;--primary-bg: #eff6ff;--sidebar-bg: #f8fafc;--sidebar-width: 340px;--sidebar-right-width: 220px;--header-bg: #0f172a;--header-height: 52px;--border: #e2e8f0;--border-focus: #93c5fd;--text: #1e293b;--text-secondary: #64748b;--text-muted: #94a3b8;--surface: #ffffff;--radius: 8px;--radius-sm: 6px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--transition: .15s ease}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;color:var(--text);overflow:hidden;background:#0f172a}#app{display:flex;flex-direction:column;height:100vh}.app-header{background:var(--header-bg);color:#fff;height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 20px;flex-shrink:0;border-bottom:1px solid rgba(255,255,255,.06);z-index:10}.header-brand{display:flex;align-items:center;gap:10px}.header-brand-text{display:flex;flex-direction:column;gap:2px;line-height:1.25}.header-logo{width:30px;height:30px;color:#fff;flex-shrink:0}.app-header h1{font-size:16px;font-weight:600;letter-spacing:.3px;margin:0;color:#fff}.header-slogan{margin:0;font-size:11px;font-weight:400;letter-spacing:.2px;color:#94a3b8}.header-actions{display:flex;align-items:center;gap:8px}.header-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border:1px solid rgba(255,255,255,.2);border-radius:6px;background:#ffffff14;color:#e2e8f0;font-size:13px;font-weight:500;cursor:pointer;transition:all .15s;white-space:nowrap}.header-btn:hover{background:#ffffff26;border-color:#ffffff4d}.header-btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.header-btn-primary:hover{background:var(--primary-hover)}.header-cs-wrap{position:relative;display:inline-flex;align-items:center}.header-cs-popover{position:absolute;top:calc(100% + 8px);right:0;padding:10px 12px 12px;min-width:0;background:var(--surface);color:var(--text);border-radius:var(--radius-sm);box-shadow:0 4px 16px #0f172a1a,0 0 0 1px #0f172a0f;border:1px solid var(--border);opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity .18s ease,visibility .18s ease,transform .18s ease;pointer-events:none;z-index:200;text-align:center}.header-cs-wrap:hover .header-cs-popover,.header-cs-wrap:focus-within .header-cs-popover{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}.header-cs-caption{margin:0 0 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var(--transition)}.shelf-layout-reset:hover:not(:disabled){border-color:var(--primary);background:var(--primary-bg)}.shelf-layout-reset:disabled{cursor:not-allowed;color:var(--text-muted);background:#f8fafc}.shelf-layout-list{display:flex;flex-direction:column;gap:8px}.shelf-layout-row{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;border:1px solid rgba(226,232,240,.9);background:linear-gradient(180deg,#fffffffa,#f8fafcfa);box-shadow:0 1px 3px #0f172a0a;transition:border-color var(--transition),box-shadow var(--transition),transform var(--transition)}.shelf-layout-row.is-active{border-color:#60a5fae6;box-shadow:0 0 0 3px 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rgba(255,255,255,.1)}.header-btn-toggle.active{background:#16a34a;border-color:#16a34a;color:#fff;box-shadow:0 2px 8px #16a34a59}.header-btn-toggle.active:hover{background:#15803d;border-color:#15803d}.hint-touch{display:none}@media(hover:none)and (pointer:coarse){.hint-mouse{display:none}.hint-touch{display:inline}}.webgl-error{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;height:100%;padding:40px;text-align:center;color:#475569;background:#f8fafc}.webgl-error svg{color:#f59e0b}.webgl-error h2{font-size:18px;font-weight:600;color:#1e293b}.webgl-error p{font-size:14px;margin-bottom:4px}.webgl-error ul{list-style:disc;text-align:left;font-size:13px;line-height:1.8;padding-left:20px;color:#64748b}@media(max-width:900px){.sidebar{width:260px}}@media(max-width:680px){#app{height:100dvh;height:100vh}.app-body{flex-direction:column;overflow:auto}.sidebar{width:100%;max-height:45vh;border-right:none;border-left:none;border-bottom:1px solid var(--border);flex-shrink:0}.sidebar.sidebar-right{border-left:none}.viewport{min-height:300px}.template-nav{flex-wrap:wrap;max-width:calc(100% - 24px)}.template-card{padding:5px 10px;font-size:12px}.viewport-hint{font-size:11px;padding:5px 12px;bottom:10px}.app-header h1{font-size:14px}.header-slogan{font-size:10px}.header-actions{gap:4px}.header-btn{padding:5px 8px;font-size:12px}.header-btn svg{display:none}}