:root{--font-display: "Avenir Next Condensed", "DIN Condensed", "Bahnschrift Condensed", "PingFang SC", sans-serif;--font-body: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", sans-serif;--font-mono: "SF Mono", "Cascadia Code", "Source Code Pro", Consolas, monospace;--bg-primary: #171c24;--bg-secondary: #1f2734;--bg-tertiary: #263243;--bg-hover: #314258;--border-color: #40526c;--border-focus: #78aef8;--text-primary: #edf3fb;--text-secondary: #a9bad0;--text-muted: #7b8ba0;--accent-blue: #2f83d8;--accent-blue-hover: #4a96e2;--accent-blue-active: #1f6dbd;--success-green: #78d0a3;--warning-yellow: #dfc376;--error-red: #eb8d7d;--info-blue: #7eb8ef;--electric-field-color: rgba(255, 200, 0, .3);--magnetic-field-color: rgba(100, 150, 255, .3);--particle-positive: #ff4444;--particle-negative: #4444ff;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 8px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .5);--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .3s ease;--shell-bg: #101721;--shell-surface: #1a2433;--shell-panel: #162131;--shell-border: #34465d;--shell-field-bg: #202b3a;--canvas-stage-bg: #111821;--canvas-grid-major: rgba(138, 168, 214, .48);--canvas-grid-minor: rgba(138, 168, 214, .22);--status-strip-bg: #131d2a;--teaching-accent: #e1b760;--action-primary-bg: #2f83d8;--toolbar-panel-bg: #121b28;--toolbar-panel-border: #2a3d54;--toolbar-title-color: #edf3fb;--toolbar-group-label: #a7bad2;--toolbar-group-divider: #223245;--toolbar-card-bg: #182536;--toolbar-card-bg-hover: #203043;--toolbar-card-bg-active: #233a53;--toolbar-card-border: #314660;--toolbar-card-border-hover: #4a678c;--toolbar-card-border-active: #74a7dd;--toolbar-card-shadow-hover: 0 4px 12px rgba(4, 9, 16, .45);--toolbar-card-shadow-active: 0 6px 16px rgba(5, 12, 20, .55);--toolbar-icon-color: #a7d2f7;--toolbar-icon-bg: #132032;--toolbar-icon-border: #33506c;--toolbar-armed-accent: #8fc8ff;--toolbar-preset-bg: #172334;--toolbar-preset-border: #324861}body.light-theme{--bg-primary: #ebf1f8;--bg-secondary: #f4f7fb;--bg-tertiary: #fcfdff;--bg-hover: #e1ebf5;--border-color: #c4d3e3;--border-focus: #2f7fd7;--text-primary: #1f3042;--text-secondary: #4f6379;--text-muted: #76899e;--accent-blue: #1f78d2;--accent-blue-hover: #3d8adf;--accent-blue-active: #1665b3;--success-green: #2d8a57;--warning-yellow: #b98a2c;--error-red: #d86d47;--info-blue: #2f7fd7;--electric-field-color: rgba(255, 200, 0, .15);--magnetic-field-color: rgba(100, 150, 255, .15);--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 8px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .2);--shell-bg: #e8eff6;--shell-surface: #f5f9fd;--shell-panel: #fbfdff;--shell-border: #cad8e7;--shell-field-bg: #edf4fb;--canvas-stage-bg: #f7fbff;--canvas-grid-major: rgba(81, 114, 160, .46);--canvas-grid-minor: rgba(81, 114, 160, .18);--status-strip-bg: #e7eff8;--teaching-accent: #b88428;--action-primary-bg: #1f78d2;--toolbar-panel-bg: #eef4fb;--toolbar-panel-border: #cfdbeb;--toolbar-title-color: #28466d;--toolbar-group-label: #54677c;--toolbar-group-divider: #d8e3ef;--toolbar-card-bg: #f8fbff;--toolbar-card-bg-hover: #edf4fb;--toolbar-card-bg-active: #e4eef9;--toolbar-card-border: #cfdae7;--toolbar-card-border-hover: #aebfd4;--toolbar-card-border-active: #7fa6d2;--toolbar-card-shadow-hover: 0 6px 18px rgba(33, 52, 76, .08);--toolbar-card-shadow-active: 0 8px 22px rgba(33, 52, 76, .12);--toolbar-icon-color: #37536f;--toolbar-icon-bg: #e7eff8;--toolbar-icon-border: #c5d2e1;--toolbar-armed-accent: #2f7bc8;--toolbar-preset-bg: #f4f9fe;--toolbar-preset-border: #cfdbe8}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-body);background:var(--shell-bg);color:var(--text-primary);overflow:hidden;transition:background-color var(--transition-normal),color var(--transition-normal)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-hover);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--border-color)}#app{--panel-width: 0px;--header-height: 156px;display:grid;grid-template-areas:"toolbar header header" "toolbar canvas panel" "toolbar footer footer";grid-template-columns:220px 1fr var(--panel-width);grid-template-rows:var(--header-height) 1fr 40px;height:100vh;height:100dvh;width:100vw}#app.panel-open{--panel-width: 320px}#app.view-mode{--panel-width: 0px;--header-height: 84px;grid-template-areas:"header" "canvas" "footer";grid-template-columns:1fr;grid-template-rows:var(--header-height) 1fr 40px}#app.desktop-utility-tray-open:not(.layout-phone){--header-height: 214px}#header{grid-area:header;background:radial-gradient(circle at top left,color-mix(in srgb,var(--teaching-accent) 10%,transparent),transparent 34%),linear-gradient(135deg,color-mix(in srgb,var(--shell-surface) 92%,#fff 8%),var(--shell-panel));border-bottom:1px solid var(--shell-border);display:grid;grid-template-columns:minmax(260px,1.05fr) minmax(0,1.95fr);gap:12px;padding:12px 16px;box-shadow:0 14px 34px #0e162214}.header-brand-block{display:flex;flex-direction:column;justify-content:flex-start;gap:10px;min-width:0}.header-title-stack{display:flex;flex-direction:column;gap:4px;min-width:0}.header-kicker{font-size:11px;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:var(--teaching-accent)}#header h1{font-family:var(--font-display);font-size:clamp(1.2rem,.95rem + .55vw,1.62rem);font-weight:700;letter-spacing:.02em;color:var(--text-primary);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-controls{display:grid;grid-template-rows:auto auto;align-content:start;gap:8px;min-width:0}.header-actions,.header-settings{display:flex;align-items:flex-start;gap:8px;flex-wrap:wrap;min-width:0}.header-action-group,.desktop-scene-settings{display:flex;flex-wrap:wrap;align-items:center;gap:7px;padding:7px 8px;border:1px solid var(--shell-border);border-radius:12px;background:color-mix(in srgb,var(--shell-panel) 90%,#fff 10%);box-shadow:0 10px 24px #080e1814;min-width:0;position:relative}.header-action-group--primary{background:linear-gradient(135deg,color-mix(in srgb,var(--action-primary-bg) 14%,var(--shell-panel)),color-mix(in srgb,var(--shell-panel) 88%,#fff 12%));border-color:color-mix(in srgb,var(--action-primary-bg) 24%,var(--shell-border));box-shadow:0 14px 30px #0b14201f}.header-action-group--scene,.header-action-group--utility{background:color-mix(in srgb,var(--shell-panel) 94%,var(--shell-surface));box-shadow:0 8px 18px #080e180f}.header-action-group--teaching{background:linear-gradient(135deg,color-mix(in srgb,var(--teaching-accent) 8%,var(--shell-panel)),color-mix(in srgb,var(--shell-panel) 92%,#fff 8%))}.header-group-label{display:inline-flex;align-items:center;min-height:26px;padding:0 8px;border-radius:999px;background:color-mix(in srgb,var(--shell-field-bg) 82%,transparent);border:1px solid color-mix(in srgb,var(--shell-border) 86%,transparent);color:var(--text-secondary);font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase}.control-label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary);flex:0 0 auto;min-height:42px;padding:6px 10px;border:1px solid var(--shell-border);border-radius:12px;background:var(--shell-field-bg)}.header-actions .btn{font-size:12px;min-height:36px;padding:6px 10px}.btn-subtle{background:color-mix(in srgb,var(--shell-field-bg) 92%,transparent);border-color:var(--shell-border);color:var(--text-primary)}.btn-subtle:hover{background:color-mix(in srgb,var(--shell-field-bg) 70%,var(--accent-blue));border-color:color-mix(in srgb,var(--accent-blue) 60%,var(--shell-border))}.header-mode-strip{display:flex;flex-wrap:wrap;align-items:center;gap:6px;min-width:0}.header-mode-badge,.header-mode-state,.header-mode-metric,.header-mode-copy{min-height:30px;display:inline-flex;align-items:center;border-radius:999px;padding:0 11px;border:1px solid var(--shell-border);background:color-mix(in srgb,var(--shell-panel) 88%,#fff 12%);font-size:12px}.header-mode-badge{font-weight:700;letter-spacing:.06em}.header-mode-badge[data-tone=edit]{color:var(--teaching-accent)}.header-mode-badge[data-tone=demo]{color:var(--accent-blue)}.header-mode-badge[data-tone=classroom]{color:var(--success-green)}.header-mode-copy{max-width:min(34vw,420px);color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-mode-guidance{min-height:30px;display:inline-flex;align-items:center;border-radius:999px;padding:0 11px;border:1px dashed color-mix(in srgb,var(--teaching-accent) 42%,var(--shell-border));background:color-mix(in srgb,var(--teaching-accent) 10%,transparent);color:var(--text-secondary);font-size:11px;font-weight:600}.desktop-scene-settings{justify-content:flex-end;width:100%}.desktop-scene-file-tray .desktop-scene-settings,.header-settings .desktop-scene-settings{margin-left:auto}.scene-settings-shell{display:flex;flex-wrap:wrap;align-items:center;gap:8px;width:100%}.scene-settings-shell--compact .control-note{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.scene-settings-primary,.scene-settings-advanced{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.scene-advanced-toggle{min-height:38px;padding:0 12px;border:1px dashed color-mix(in srgb,var(--teaching-accent) 52%,var(--shell-border));border-radius:999px;background:color-mix(in srgb,var(--shell-field-bg) 84%,transparent);color:var(--text-primary);font-size:12px;font-weight:600;cursor:pointer}.scene-advanced-toggle:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.control-label input[type=number]{width:80px;font-family:var(--font-body)}#gravity-input{width:70px}#scale-px-per-meter{width:76px}#boundary-margin-input{width:70px}#boundary-mode-select{width:108px}#timestep-slider{width:88px}#timestep-value{min-width:40px;color:var(--info-blue);font-weight:500}#toolbar{grid-area:toolbar;background:var(--toolbar-panel-bg);border-right:1px solid var(--toolbar-panel-border);overflow-y:auto;padding:14px 12px 18px;display:flex;flex-direction:column;gap:14px}.toolbar-head{display:flex;flex-direction:column;gap:8px}.toolbar-kicker{font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--teaching-accent)}#toolbar h2{font-family:var(--font-display);font-size:19px;margin:0;padding:0 6px 12px;color:var(--toolbar-title-color);border-bottom:1px solid var(--toolbar-group-divider);letter-spacing:.2px;position:relative}#toolbar h2:after{content:"";position:absolute;left:6px;bottom:-1px;width:72px;height:2px;border-radius:999px;background:var(--toolbar-armed-accent)}.toolbar-content{display:flex;flex-direction:column;gap:12px}#toolbar .tool-section{margin-bottom:0}.toolbar-group{border:1px solid var(--toolbar-group-divider);border-radius:12px;background:color-mix(in srgb,var(--toolbar-panel-bg) 89%,#fff 11%);padding:8px}.toolbar-group-title{font-size:12px;color:var(--toolbar-group-label);margin:0;padding:0 2px;letter-spacing:.35px;font-weight:600}.toolbar-group-toggle{width:100%;border:none;background:transparent;padding:0 0 8px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;color:inherit}.toolbar-group-toggle:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px;border-radius:8px}.toolbar-group-chevron{font-size:14px;color:var(--toolbar-group-label);transition:transform var(--transition-fast)}.toolbar-group-chevron.collapsed{transform:rotate(-90deg)}.toolbar-group-items{display:flex;flex-direction:column;gap:6px}#toolbar .preset-section{border:1px solid var(--toolbar-group-divider);border-radius:12px;background:color-mix(in srgb,var(--toolbar-panel-bg) 89%,#fff 11%);padding:8px;display:flex;flex-direction:column;gap:6px}#toolbar .preset-section h3{font-size:12px;color:var(--toolbar-group-label);margin:0 0 2px;padding:0 2px;letter-spacing:.35px;font-weight:600}.toolbar-hint{margin:0;padding:10px 12px;font-size:12px;line-height:1.55;color:var(--text-secondary);border:1px solid var(--toolbar-group-divider);border-radius:14px;background:color-mix(in srgb,var(--toolbar-panel-bg) 86%,#fff 14%)}.desktop-teaching-sequence{display:flex;flex-wrap:wrap;gap:6px}.desktop-teaching-step{min-height:26px;display:inline-flex;align-items:center;padding:0 9px;border-radius:999px;border:1px dashed color-mix(in srgb,var(--teaching-accent) 46%,var(--toolbar-group-divider));background:color-mix(in srgb,var(--toolbar-panel-bg) 84%,#fff 16%);color:var(--text-secondary);font-size:11px;font-weight:600}.tool-item{display:flex;align-items:center;gap:10px;min-height:44px;padding:7px 9px;margin-bottom:0;background:var(--toolbar-card-bg);border:1px solid var(--toolbar-card-border);border-radius:10px;cursor:grab;transition:border-color var(--transition-fast),box-shadow var(--transition-fast),background var(--transition-fast),transform var(--transition-fast);-webkit-user-select:none;-moz-user-select:none;user-select:none;position:relative}.tool-item:before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:2px;background:transparent;transition:background var(--transition-fast)}.tool-item:hover{background:var(--toolbar-card-bg-hover);border-color:var(--toolbar-card-border-hover);box-shadow:var(--toolbar-card-shadow-hover)}.tool-item:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.tool-item.active,.tool-item[aria-pressed=true]{background:var(--toolbar-card-bg-active);border-color:var(--toolbar-card-border-active);box-shadow:var(--toolbar-card-shadow-active);transform:translateY(-1px)}.tool-item.active:before,.tool-item[aria-pressed=true]:before{background:var(--toolbar-armed-accent)}.tool-item:active{cursor:grabbing;transform:scale(.985)}.tool-item-icon{width:32px;height:32px;min-width:32px;border-radius:9px;border:1px solid var(--toolbar-icon-border);background:var(--toolbar-icon-bg);display:inline-flex;align-items:center;justify-content:center;padding:4px}.tool-item-icon .registry-icon{width:23px;height:23px;display:block}.tool-item-icon .registry-icon [stroke]{stroke-width:1.85;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}.tool-item-icon .registry-icon text{fill:currentColor;font-size:6px;font-weight:700;font-family:var(--font-body)}.tool-item svg{color:var(--toolbar-icon-color)}.tool-item-label{font-size:13px;color:var(--text-primary);line-height:1.2;flex:1 1 auto;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}body.light-theme #toolbar{background:linear-gradient(180deg,color-mix(in srgb,var(--toolbar-panel-bg) 90%,#fff 10%),var(--toolbar-panel-bg));border-right-color:#d0dceb;box-shadow:inset -1px 0 #ffffff73}body.light-theme #toolbar h2{margin:0 6px;padding:0 0 12px;border-bottom-color:#d8dee8}body.light-theme #toolbar h2:after{left:0;width:136px;height:2.5px}body.light-theme .toolbar-group{border:1px solid rgba(202,216,231,.55);background:color-mix(in srgb,var(--toolbar-panel-bg) 74%,#fff 26%);padding:0 2px}body.light-theme .toolbar-group-toggle{padding:4px 6px 8px}body.light-theme .toolbar-group-title{color:#4f5c69;font-size:14px;font-weight:700}body.light-theme .toolbar-group-chevron{color:#7a8a9b}body.light-theme .toolbar-group-items{gap:7px;margin-bottom:10px}body.light-theme .tool-item{background:#f8fbff;border-color:#cbd9e8;box-shadow:0 1px #fffc}body.light-theme .tool-item:hover{background:#eef5fc;border-color:#acc1d8}body.light-theme .tool-item-icon{width:30px;height:30px;min-width:30px;border:none;background:transparent;padding:2px}body.light-theme .tool-item svg{color:#455a70}body.light-theme .tool-item-label{color:#2f3d4b}body.light-theme #toolbar .preset-section{border:1px solid rgba(202,216,231,.55);background:color-mix(in srgb,var(--toolbar-panel-bg) 74%,#fff 26%);padding:0 2px}body.light-theme #toolbar .preset-section h3{color:#4f5c69;font-size:14px;font-weight:700;padding:4px 6px}body.light-theme .desktop-teaching-step{background:color-mix(in srgb,var(--toolbar-panel-bg) 70%,#fff 30%);color:#536578}body.light-theme .preset-btn{background:#f8fbff;border-color:#cbd9e8}body.light-theme .preset-btn:hover{background:#eef5fc;border-color:#acc1d8}.preset-btn{width:100%;min-height:40px;padding:7px 9px;margin-bottom:0;background:var(--toolbar-preset-bg);border:1px solid var(--toolbar-preset-border);border-radius:9px;color:var(--text-primary);font-size:13px;cursor:pointer;transition:border-color var(--transition-fast),box-shadow var(--transition-fast),background var(--transition-fast)}.preset-btn:hover{background:var(--toolbar-card-bg-hover);border-color:var(--toolbar-card-border-hover);box-shadow:var(--toolbar-card-shadow-hover)}.preset-btn:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.preset-section-heading{display:flex;flex-direction:column;gap:2px}.preset-section-heading p{margin:0 0 6px;padding:0 2px;font-size:11px;line-height:1.45;color:var(--text-secondary)}#canvas-area{grid-area:canvas;background:var(--canvas-stage-bg);position:relative;overflow:hidden}#canvas-container{width:100%;height:100%;position:relative}#canvas-container canvas{position:absolute;top:0;left:0;width:100%;height:100%;touch-action:none}#bg-canvas{z-index:1}#field-canvas{z-index:2}#particle-canvas{z-index:3}#fps-counter{position:absolute;top:10px;left:10px;background:color-mix(in srgb,var(--status-strip-bg) 90%,transparent);color:var(--success-green);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:12px;z-index:10}.canvas-empty-state{position:absolute;inset:0;z-index:8;display:flex;align-items:center;justify-content:center;padding:clamp(18px,3vw,34px);pointer-events:none}.canvas-empty-card{max-width:min(460px,92%);padding:clamp(16px,2vw,24px);border:1px solid color-mix(in srgb,var(--teaching-accent) 26%,var(--shell-border));border-radius:20px;background:linear-gradient(145deg,color-mix(in srgb,var(--shell-panel) 92%,#fff 8%),color-mix(in srgb,var(--shell-surface) 94%,transparent));box-shadow:0 28px 64px #0a0f1929;text-align:left}body.light-theme .canvas-empty-card{background:linear-gradient(145deg,color-mix(in srgb,var(--shell-panel) 86%,#fff 14%),color-mix(in srgb,var(--shell-surface) 92%,#eef5fc 8%));box-shadow:0 24px 56px #23374f24}body.light-theme .canvas-empty-playbook{background:color-mix(in srgb,var(--shell-field-bg) 62%,#fff 38%)}body.light-theme .desktop-teaching-rail{background:color-mix(in srgb,var(--shell-panel) 88%,#fff 12%);box-shadow:0 16px 30px #23374f24}.canvas-empty-badge{display:inline-flex;align-items:center;min-height:28px;margin-bottom:10px;padding:0 10px;border-radius:999px;background:color-mix(in srgb,var(--teaching-accent) 18%,transparent);border:1px solid color-mix(in srgb,var(--teaching-accent) 42%,var(--shell-border));color:var(--teaching-accent);font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.canvas-empty-title{margin:0 0 10px;font-family:var(--font-display);font-size:clamp(1.4rem,1.08rem + .55vw,1.8rem);line-height:1.1;color:var(--text-primary)}.canvas-empty-copy{margin:0;color:var(--text-secondary);font-size:14px;line-height:1.6}.canvas-empty-playbook{margin-top:16px;padding:12px 14px;border:1px solid color-mix(in srgb,var(--shell-border) 84%,transparent);border-radius:16px;background:color-mix(in srgb,var(--shell-field-bg) 72%,transparent)}.canvas-empty-playbook-title{margin:0 0 10px;color:var(--text-primary);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.canvas-empty-playbook-list{list-style:none;display:grid;gap:8px;margin:0;padding:0;counter-reset:playbook-step}.canvas-empty-playbook-item{counter-increment:playbook-step;display:flex;align-items:center;gap:10px;color:var(--text-secondary);font-size:13px;line-height:1.45}.canvas-empty-playbook-item:before{content:counter(playbook-step);width:22px;height:22px;flex:0 0 22px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:color-mix(in srgb,var(--teaching-accent) 18%,transparent);border:1px solid color-mix(in srgb,var(--teaching-accent) 38%,var(--shell-border));color:var(--teaching-accent);font-size:11px;font-weight:700}.canvas-empty-tips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.canvas-empty-tip{min-height:30px;display:inline-flex;align-items:center;padding:0 10px;border-radius:999px;border:1px solid var(--shell-border);background:color-mix(in srgb,var(--shell-field-bg) 90%,#fff 10%);color:var(--text-secondary);font-size:12px}.desktop-teaching-rail{position:absolute;left:18px;right:auto;bottom:18px;z-index:9;max-width:min(560px,calc(100% - 36px));display:grid;gap:10px;padding:12px 14px;border:1px solid color-mix(in srgb,var(--shell-border) 86%,transparent);border-radius:18px;background:color-mix(in srgb,var(--status-strip-bg) 90%,transparent);box-shadow:0 18px 34px #0a0f192e;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.desktop-teaching-rail-copy{display:grid;gap:4px}.desktop-teaching-rail-kicker{color:var(--teaching-accent);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}.desktop-teaching-rail-text{color:var(--text-primary);font-size:13px;line-height:1.45}.desktop-teaching-rail-steps{display:flex;flex-wrap:wrap;gap:8px}.desktop-teaching-rail-step{min-height:28px;display:inline-flex;align-items:center;padding:0 10px;border-radius:999px;border:1px solid var(--shell-border);background:color-mix(in srgb,var(--shell-field-bg) 86%,#fff 14%);color:var(--text-secondary);font-size:12px;font-weight:600}.desktop-teaching-rail-step[data-state=done]{border-color:color-mix(in srgb,var(--success-green) 42%,var(--shell-border));color:var(--success-green)}.desktop-teaching-rail-step[data-state=active]{border-color:color-mix(in srgb,var(--teaching-accent) 46%,var(--shell-border));background:color-mix(in srgb,var(--teaching-accent) 14%,transparent);color:var(--text-primary)}.geometry-overlay-badge{position:fixed;right:calc(10px + var(--phone-safe-right-inset, 0px));bottom:calc(var(--phone-bottom-bar-height, 60px) + var(--phone-safe-bottom-inset, 0px) + 10px);min-width:132px;max-width:min(46vw,220px);padding:8px 10px;border:1px solid color-mix(in srgb,var(--accent-blue) 40%,var(--border-color));border-radius:12px;background:color-mix(in srgb,var(--bg-secondary) 92%,#fff 8%);box-shadow:var(--shadow-lg);z-index:170;pointer-events:none}.geometry-overlay-title{margin:0 0 4px;font-size:12px;font-weight:700;color:var(--text-primary)}.geometry-overlay-row{margin:0;display:flex;align-items:baseline;justify-content:space-between;gap:8px;font-size:11px;color:var(--text-secondary)}.geometry-overlay-row strong{color:var(--text-primary);font-size:12px;font-weight:700}.geometry-overlay-key{text-transform:uppercase;letter-spacing:.3px}.drawer-host--property{grid-area:panel;min-width:0}.drawer-host--property>#property-panel{height:100%}.panel{grid-area:panel;background:var(--bg-secondary);border-left:1px solid var(--border-color);display:flex;flex-direction:column}.panel-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md);border-bottom:1px solid var(--border-color)}.panel-header h3{font-size:14px;font-weight:600}.panel-header-actions{display:inline-flex;align-items:center;gap:8px}.panel-content{flex:1;overflow-y:auto;padding:var(--spacing-md)}.property-section{margin-bottom:var(--spacing-sm);border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-primary)}.property-quick-title{padding:8px 10px 6px;border-bottom:1px solid var(--border-color);font-size:12px;color:var(--text-secondary);font-weight:600}.property-rows{display:grid;grid-template-columns:1fr;gap:6px;margin:0;padding:10px}.property-key,.property-value{margin:0}.property-key label{display:block;font-size:13px;color:var(--text-secondary);line-height:1.3;padding-top:0}.property-value input[type=text],.property-value input[type=number],.property-value select,.property-value textarea{width:100%;padding:var(--spacing-sm);background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px;transition:border-color var(--transition-fast)}.property-value input:focus,.property-value select:focus,.property-value textarea:focus{outline:none;border-color:var(--border-focus)}.property-value input[type=checkbox]{width:20px;height:20px;margin-top:6px}.property-value textarea{resize:vertical}.property-expression-hint{margin-top:6px;font-size:12px;line-height:1.4;color:var(--text-secondary)}.property-expression-hint.is-ok{color:var(--accent-green)}.property-expression-hint.is-error{color:var(--accent-red)}.section-toggle{width:100%;padding:8px 10px;border:none;background:var(--bg-hover);color:var(--text-primary);font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:space-between;cursor:pointer;border-bottom:1px solid var(--border-color)}.section-toggle[aria-expanded=false]{border-bottom:none}.section-toggle:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.property-section>div{padding:10px 10px 2px}.panel-actions{padding:var(--spacing-md);border-top:1px solid var(--border-color);background:var(--bg-secondary)}.panel-actions .btn{width:100%;justify-content:center}#footer{grid-area:footer;background:var(--status-strip-bg);border-top:1px solid var(--shell-border);display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-lg);font-size:12px;color:var(--text-secondary)}#footer span{margin-right:var(--spacing-lg)}#app.layout-tablet,#app.layout-phone{--header-height: 154px;grid-template-columns:60px 1fr;grid-template-areas:"toolbar header" "toolbar canvas" "toolbar footer"}#app.layout-tablet #property-panel,#app.layout-phone #property-panel{position:fixed;right:-320px;top:var(--header-height);bottom:40px;width:320px;transition:right var(--transition-slow);z-index:100;box-shadow:var(--shadow-lg)}#app.layout-tablet .drawer-host--property{position:fixed;inset:0;grid-area:auto;z-index:95;pointer-events:none}#app.layout-tablet .drawer-host--property>#property-panel{pointer-events:auto}#app.layout-phone .drawer-host--property.drawer-host--sheet{top:var(--header-height);bottom:calc(var(--phone-bottom-bar-height, 72px) + var(--phone-safe-bottom-inset, 0px))}#app.layout-tablet #property-panel.open,#app.layout-phone #property-panel.open{right:0}#app.layout-tablet #toolbar .tool-item-label,#app.layout-tablet #toolbar h2,#app.layout-tablet #toolbar .toolbar-group-title,#app.layout-tablet #toolbar .preset-section h3,#app.layout-phone #toolbar .tool-item-label,#app.layout-phone #toolbar h2,#app.layout-phone #toolbar .toolbar-group-title,#app.layout-phone #toolbar .preset-section h3{display:none}#app.layout-tablet #toolbar,#app.layout-phone #toolbar{padding:var(--spacing-sm)}#app.layout-tablet{--header-height: 194px;grid-template-columns:92px 1fr}#app.layout-tablet #header{grid-template-columns:1fr;gap:10px;padding:12px 14px}#app.layout-tablet .header-brand-block,#app.layout-tablet .header-controls{gap:8px}#app.layout-tablet .header-mode-strip{gap:6px}#app.layout-tablet .header-group-label{display:none}#app.layout-tablet #toolbar[data-compact=true] .toolbar-head{align-items:center;gap:6px}#app.layout-tablet #toolbar[data-compact=true] .toolbar-kicker{text-align:center;letter-spacing:.12em}#app.layout-tablet #toolbar[data-compact=true] .toolbar-hint{padding:8px 6px;font-size:11px;line-height:1.35;text-align:center}#app.layout-tablet #toolbar[data-compact=true] .preset-section-heading p{display:none}#app.layout-tablet #toolbar .toolbar-group,#app.layout-phone #toolbar .toolbar-group,#app.layout-phone #toolbar .preset-section{padding:4px;border-color:transparent;background:transparent}#app.layout-phone{--phone-safe-top-inset: env(safe-area-inset-top, 0px);--phone-safe-left-inset: env(safe-area-inset-left, 0px);--phone-safe-right-inset: env(safe-area-inset-right, 0px);--header-height: calc(96px + var(--phone-safe-top-inset));--phone-bottom-bar-height: 60px;--phone-safe-bottom-inset: env(safe-area-inset-bottom, 0px);--phone-nav-btn-min-height: 44px;--phone-nav-btn-font-size: 12px;--phone-sheet-title-font-size: 13px;--phone-sheet-body-padding-y: 6px;--phone-sheet-body-padding-x: 8px;--phone-sheet-control-gap: 4px;--phone-sheet-section-gap: 6px;--phone-sheet-section-padding: 4px;--phone-sheet-field-input-height: 44px;--phone-sheet-action-btn-height: 44px;--phone-sheet-checkbox-size: 24px;--phone-panel-section-gap: 4px;--phone-panel-toggle-height: 44px;--phone-panel-toggle-font-size: 11px;--phone-panel-toggle-padding-y: 2px;--phone-panel-toggle-line-height: 1.2;--phone-panel-section-padding: 3px 6px 4px;--phone-panel-rows-gap: 3px 4px;--phone-panel-rows-padding: 3px 4px;--phone-panel-label-font-size: 12px;--phone-panel-input-height: 44px;--phone-panel-input-font-size: 16px;--phone-panel-textarea-height: 48px;--phone-panel-checkbox-size: 24px;--phone-panel-action-btn-height: 44px;--phone-panel-density-btn-height: 44px;--phone-panel-density-btn-font-size: 11px;--phone-panel-density-btn-padding: 4px 8px;grid-template-areas:"header" "canvas" "footer";grid-template-columns:1fr;grid-template-rows:var(--header-height) 1fr 0}#app.layout-phone.phone-density-comfortable{--phone-nav-btn-min-height: 48px;--phone-nav-btn-font-size: 13px;--phone-sheet-title-font-size: 14px;--phone-sheet-body-padding-y: 8px;--phone-sheet-body-padding-x: 10px;--phone-sheet-control-gap: 6px;--phone-sheet-section-gap: 8px;--phone-sheet-section-padding: 6px;--phone-sheet-field-input-height: 48px;--phone-sheet-action-btn-height: 48px;--phone-sheet-checkbox-size: 26px;--phone-panel-section-gap: 6px;--phone-panel-toggle-height: 48px;--phone-panel-toggle-font-size: 12px;--phone-panel-toggle-padding-y: 5px;--phone-panel-toggle-line-height: 1.3;--phone-panel-section-padding: 4px 8px 6px;--phone-panel-rows-gap: 4px 6px;--phone-panel-rows-padding: 4px 6px;--phone-panel-label-font-size: 13px;--phone-panel-input-height: 48px;--phone-panel-input-font-size: 16px;--phone-panel-textarea-height: 56px;--phone-panel-checkbox-size: 26px;--phone-panel-action-btn-height: 48px;--phone-panel-density-btn-height: 48px;--phone-panel-density-btn-font-size: 12px;--phone-panel-density-btn-padding: 6px 10px}#app.layout-phone #header{grid-template-columns:1fr;padding:calc(var(--spacing-xs) + var(--phone-safe-top-inset)) calc(var(--spacing-sm) + var(--phone-safe-right-inset)) var(--spacing-xs) calc(var(--spacing-sm) + var(--phone-safe-left-inset))}#app.layout-phone #header h1{display:none}#app.layout-phone #timestep-slider{width:128px}#app.layout-phone #property-panel{width:100vw;right:-100vw}#app.layout-phone #property-panel.panel-sheet{position:absolute;inset:auto 0 0;width:auto;height:auto;max-height:min(70vh,560px,calc(100vh - var(--header-height) - var(--phone-bottom-bar-height, 72px) - var(--phone-safe-bottom-inset, 0px)));border-left:none;border-top:1px solid var(--border-color);border-radius:14px 14px 0 0;transform:translateY(100%);transition:transform var(--transition-slow)}#app.layout-phone #property-panel.panel-sheet.open{transform:translateY(0)}#app.layout-phone #property-panel .panel-header .btn-icon{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}#app.layout-phone #property-panel .panel-header,#app.layout-phone #property-panel .panel-content{padding-left:calc(var(--spacing-md) + var(--phone-safe-left-inset, 0px));padding-right:calc(var(--spacing-md) + var(--phone-safe-right-inset, 0px))}#app.layout-phone #property-panel .property-section{margin-bottom:var(--phone-panel-section-gap)}#app.layout-phone #property-panel .section-toggle{min-height:var(--phone-panel-toggle-height);padding-top:var(--phone-panel-toggle-padding-y);padding-bottom:var(--phone-panel-toggle-padding-y);font-size:var(--phone-panel-toggle-font-size);line-height:var(--phone-panel-toggle-line-height)}#app.layout-phone #property-panel .property-section>div{padding:var(--phone-panel-section-padding)}#app.layout-phone #property-panel .panel-actions .btn{min-height:var(--phone-panel-action-btn-height)}#app.layout-phone #property-panel .property-rows{grid-template-columns:minmax(110px,1fr) minmax(120px,1fr);gap:var(--phone-panel-rows-gap);padding:var(--phone-panel-rows-padding)}#app.layout-phone #property-panel .property-key label{font-size:var(--phone-panel-label-font-size);padding-top:4px}#app.layout-phone #property-panel .property-value input[type=text],#app.layout-phone #property-panel .property-value input[type=number],#app.layout-phone #property-panel .property-value select,#app.layout-phone #property-panel .property-value textarea{min-height:var(--phone-panel-input-height);padding:4px 6px;font-size:var(--phone-panel-input-font-size)}#app.layout-phone .phone-scene-body .control-label input[type=number],#app.layout-phone .phone-scene-body .control-label select,#app.layout-phone .phone-selected-geometry-field input{font-size:16px}#app.layout-phone #property-panel .property-value textarea{min-height:var(--phone-panel-textarea-height)}#app.layout-phone #property-panel .property-checkbox-field{width:100%;min-height:var(--phone-panel-input-height);padding:0 6px;display:inline-flex;align-items:center;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-primary);touch-action:manipulation}#app.layout-phone #property-panel .property-checkbox-input{width:var(--phone-panel-checkbox-size);height:var(--phone-panel-checkbox-size);margin:0}#app.layout-phone #property-panel .panel-header-actions .btn{min-height:var(--phone-panel-density-btn-height);padding:var(--phone-panel-density-btn-padding);font-size:var(--phone-panel-density-btn-font-size)}#app.layout-phone #footer{display:none}#app.layout-phone #canvas-area{padding-bottom:calc(var(--phone-bottom-bar-height) + var(--phone-safe-bottom-inset, 0px))}@media(orientation:landscape)and (max-height:540px){#app.layout-phone{--header-height: calc(72px + var(--phone-safe-top-inset));--phone-bottom-bar-height: 56px;--phone-nav-btn-min-height: 44px;--phone-nav-btn-font-size: 11px;--phone-sheet-title-font-size: 12px;--phone-sheet-body-padding-y: 6px;--phone-sheet-body-padding-x: 8px;--phone-sheet-control-gap: 4px;--phone-sheet-section-gap: 6px;--phone-sheet-section-padding: 4px;--phone-sheet-field-input-height: 44px;--phone-sheet-action-btn-height: 44px}#app.layout-phone.phone-density-comfortable{--phone-bottom-bar-height: 64px;--phone-nav-btn-min-height: 48px;--phone-nav-btn-font-size: 12px;--phone-sheet-title-font-size: 13px;--phone-sheet-body-padding-y: 8px;--phone-sheet-body-padding-x: 10px;--phone-sheet-control-gap: 6px;--phone-sheet-section-gap: 8px;--phone-sheet-section-padding: 6px;--phone-sheet-field-input-height: 48px;--phone-sheet-action-btn-height: 48px}#app.layout-phone .phone-status-strip{font-size:10px}.phone-bottom-nav{gap:3px;padding:4px calc(4px + var(--phone-safe-right-inset, 0px)) calc(4px + var(--phone-safe-bottom-inset, 0px)) calc(4px + var(--phone-safe-left-inset, 0px))}.phone-sheet{max-height:min(82vh,420px,calc(100vh - var(--header-height) - var(--phone-bottom-bar-height, 72px) - var(--phone-safe-bottom-inset, 0px)))}}#app.classroom-mode:not(.layout-phone){--header-height: 176px}#app.classroom-mode.desktop-utility-tray-open:not(.layout-phone){--header-height: 226px}#app.classroom-mode:not(.layout-phone) #header h1{font-size:24px}#app.classroom-mode:not(.layout-phone) .header-actions .btn{min-height:40px;padding:7px 11px;font-size:14px}#app.classroom-mode:not(.layout-phone) .control-label{min-height:40px;font-size:15px}#app.classroom-mode:not(.layout-phone) .control-label input[type=number],#app.classroom-mode:not(.layout-phone) .control-label select{min-height:34px;font-size:14px}#app.classroom-mode:not(.layout-phone) #toolbar h2{font-size:20px}#app.classroom-mode:not(.layout-phone) #toolbar h3{font-size:15px}#app.classroom-mode:not(.layout-phone) .tool-item{min-height:48px}#app.classroom-mode:not(.layout-phone) .tool-item-label{font-size:15px}#app.classroom-mode:not(.layout-phone) #footer{font-size:14px}#app.classroom-mode:not(.layout-phone) #fps-counter{font-size:14px;padding:6px 10px}#app.layout-phone .header-actions .btn{min-height:44px;font-size:12px;padding:6px 8px}#app.layout-tablet .header-actions .btn{min-height:44px;font-size:13px;padding:7px 10px}#app.layout-phone .header-actions,#app.layout-phone .header-settings{gap:6px}#app.layout-phone .phone-status-strip{min-height:24px;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 2px;font-size:11px;color:var(--text-secondary)}#app.layout-phone .phone-status-badge{flex:0 0 auto;min-height:20px;display:inline-flex;align-items:center;padding:0 8px;border-radius:999px;background:color-mix(in srgb,var(--teaching-accent) 18%,transparent);border:1px solid color-mix(in srgb,var(--teaching-accent) 34%,var(--shell-border));color:var(--teaching-accent);font-size:10px;font-weight:700}#app.layout-phone .phone-status-text{flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#app.layout-phone .phone-status-metrics{flex:0 0 auto;color:var(--text-primary);font-weight:500}.phone-bottom-nav{position:fixed;left:0;right:0;bottom:0;height:calc(var(--phone-bottom-bar-height, 60px) + var(--phone-safe-bottom-inset, 0px));display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;padding:6px calc(6px + var(--phone-safe-right-inset, 0px)) calc(6px + var(--phone-safe-bottom-inset, 0px)) calc(6px + var(--phone-safe-left-inset, 0px));background:linear-gradient(180deg,color-mix(in srgb,var(--shell-panel) 92%,transparent),var(--status-strip-bg));border-top:1px solid var(--shell-border);box-shadow:0 -16px 30px #0d141f24;z-index:160}.phone-nav-btn{min-height:var(--phone-nav-btn-min-height);border:1px solid var(--shell-border);border-radius:14px;background:color-mix(in srgb,var(--shell-field-bg) 92%,transparent);color:var(--text-primary);font-size:var(--phone-nav-btn-font-size);font-weight:600;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;transition:transform .12s ease,background .12s ease,border-color .12s ease}.phone-nav-btn:active:not(:disabled){transform:translateY(1px) scale(.985)}.phone-nav-btn:focus-visible{outline:2px solid color-mix(in srgb,var(--accent-blue) 72%,#fff);outline-offset:1px}.phone-nav-btn.active{border-color:color-mix(in srgb,var(--accent-blue) 70%,var(--shell-border));background:color-mix(in srgb,var(--accent-blue) 18%,var(--shell-field-bg));box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent-blue) 32%,transparent)}.phone-nav-btn:disabled{opacity:.5;cursor:not-allowed}.phone-nav-btn-primary{border-color:color-mix(in srgb,var(--accent-blue) 76%,var(--shell-border));background:linear-gradient(135deg,color-mix(in srgb,var(--accent-blue) 88%,#fff 12%),var(--accent-blue-active));color:#fff;box-shadow:0 8px 18px #16467b40}.phone-nav-label{display:inline-flex;align-items:center;justify-content:center;width:100%}.phone-sheet-backdrop{position:fixed;left:0;right:0;top:var(--header-height);bottom:calc(var(--phone-bottom-bar-height, 72px) + var(--phone-safe-bottom-inset, 0px));z-index:151;border:none;padding:0;margin:0;background:color-mix(in srgb,#000 12%,transparent)}.phone-sheet{position:fixed;left:0;right:0;bottom:calc(var(--phone-bottom-bar-height, 72px) + var(--phone-safe-bottom-inset, 0px));max-height:min(70vh,520px,calc(100vh - var(--header-height) - var(--phone-bottom-bar-height, 72px) - var(--phone-safe-bottom-inset, 0px)));display:flex;flex-direction:column;border-top:1px solid var(--border-color);border-radius:16px 16px 0 0;background:var(--bg-secondary);box-shadow:var(--shadow-lg);z-index:155}.phone-sheet-header{position:relative;display:flex;align-items:center;justify-content:space-between;padding:14px calc(10px + var(--phone-safe-right-inset, 0px)) 6px calc(10px + var(--phone-safe-left-inset, 0px));border-bottom:1px solid var(--shell-border);touch-action:pan-y;-webkit-user-select:none;-moz-user-select:none;user-select:none}.phone-sheet-header:before{content:"";position:absolute;left:50%;top:5px;width:44px;height:4px;border-radius:999px;transform:translate(-50%);background:color-mix(in srgb,var(--text-muted) 45%,transparent)}.phone-sheet-header .btn-icon{min-width:var(--phone-sheet-action-btn-height);min-height:var(--phone-sheet-action-btn-height);display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);transition:transform .12s ease,background .12s ease}.phone-sheet-header .btn-icon:active{transform:scale(.96)}.phone-sheet-header .btn-icon:focus-visible{outline:2px solid color-mix(in srgb,var(--accent-blue) 72%,#fff);outline-offset:1px}.phone-sheet-header h3{margin:0;font-size:var(--phone-sheet-title-font-size)}.phone-sheet-header-main{display:flex;flex-direction:column;gap:2px;min-width:0}.phone-sheet-subtitle{margin:0;font-size:11px;line-height:1.4;color:var(--text-secondary)}.phone-sheet-body{padding:var(--phone-sheet-body-padding-y, 6px) calc(var(--phone-sheet-body-padding-x, 8px) + var(--phone-safe-right-inset, 0px)) var(--phone-sheet-body-padding-y, 6px) calc(var(--phone-sheet-body-padding-x, 8px) + var(--phone-safe-left-inset, 0px));overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.phone-scene-body{display:flex;flex-direction:column;gap:var(--phone-sheet-control-gap)}.phone-scene-body .control-label{min-height:var(--phone-sheet-field-input-height);padding:4px 6px;border:1px solid var(--shell-border);border-radius:12px;background:var(--shell-field-bg)}.phone-scene-body .control-label input[type=number],.phone-scene-body .control-label select{min-height:var(--phone-sheet-field-input-height);padding:4px 6px}.phone-scene-body .control-label input[type=checkbox]{width:var(--phone-sheet-checkbox-size);height:var(--phone-sheet-checkbox-size)}.phone-scene-body .control-label input[type=range]{min-height:var(--phone-sheet-field-input-height)}.control-note{margin:0 0 10px;padding:10px 12px;border:1px solid var(--shell-border);border-radius:12px;background:color-mix(in srgb,var(--shell-panel) 90%,#fff 10%);color:var(--text-secondary);font-size:12px;line-height:1.5}.phone-more-body{display:flex;flex-direction:column;gap:var(--phone-sheet-section-gap)}.phone-more-section{padding:var(--phone-sheet-section-padding);border:1px solid var(--shell-border);border-radius:12px;background:color-mix(in srgb,var(--shell-field-bg) 92%,#fff 8%)}.phone-more-section-title{margin:0 0 var(--phone-sheet-control-gap);font-size:12px;font-weight:600;color:var(--text-secondary)}.phone-more-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--phone-sheet-control-gap)}.phone-more-grid .btn{min-height:var(--phone-sheet-action-btn-height);justify-content:center}.phone-more-grid .btn:active{transform:translateY(1px) scale(.985)}.phone-more-danger{grid-column:1 / -1}@media(prefers-reduced-motion:reduce){.phone-nav-btn,.phone-sheet-header .btn-icon,.phone-more-grid .btn{transition:none}}.phone-selected-meta,.phone-selected-scale{margin:0 0 6px;font-size:12px;color:var(--text-secondary)}.phone-selected-empty{margin:0 0 8px;font-size:12px;color:var(--text-muted)}.phone-selected-geometry-list{display:flex;flex-direction:column;gap:var(--phone-sheet-control-gap);margin-bottom:var(--phone-sheet-control-gap)}.phone-selected-geometry-item{padding:var(--phone-sheet-section-padding);border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-tertiary)}.phone-selected-geometry-title{margin:0 0 4px;font-size:12px;color:var(--text-primary)}.phone-selected-geometry-inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--phone-sheet-control-gap)}.phone-selected-geometry-field{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--text-secondary)}.phone-selected-geometry-field input{width:100%;min-height:var(--phone-sheet-field-input-height);padding:4px 6px;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-primary);font-size:13px}#app.layout-tablet #toolbar .tool-item{min-width:44px;justify-content:center}body.light-theme #header{box-shadow:0 16px 34px #30476214}.phone-selected-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--phone-sheet-control-gap)}.phone-selected-actions .btn{min-height:var(--phone-sheet-action-btn-height);justify-content:center}.phone-selected-actions #phone-selected-delete-btn{grid-column:1 / -1}.phone-add-sheet .phone-sheet-body{padding-top:4px}.phone-add-sheet .toolbar-content{gap:var(--phone-sheet-section-gap)}.phone-add-sheet .tool-item,.phone-add-sheet .toolbar-group-toggle,.phone-add-sheet .preset-btn{min-height:var(--phone-sheet-action-btn-height)}.phone-add-sheet .preset-section{margin-top:var(--phone-sheet-section-gap)}.btn{padding:var(--spacing-sm) var(--spacing-md);background:var(--shell-field-bg);border:1px solid var(--shell-border);border-radius:12px;color:var(--text-primary);font-size:13px;cursor:pointer;transition:background var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast),transform var(--transition-fast);display:inline-flex;align-items:center;gap:var(--spacing-xs)}.btn:hover{background:color-mix(in srgb,var(--shell-field-bg) 68%,#fff 32%);border-color:color-mix(in srgb,var(--accent-blue) 48%,var(--shell-border))}.btn:active{transform:translateY(1px)}.btn:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.btn-primary{background:var(--action-primary-bg);border-color:var(--action-primary-bg);color:#fff}.btn-primary:hover{background:var(--accent-blue-hover);border-color:var(--accent-blue-hover);box-shadow:var(--shadow-sm)}.drawer-host{min-width:0}.drawer-host--markdown{position:fixed;inset:0;pointer-events:none;z-index:30}.drawer-host--markdown .markdown-board,.drawer-host--markdown.drawer-host--backdrop{pointer-events:auto}.object-action-bar{position:fixed;left:50%;bottom:calc(var(--phone-bottom-bar-height, 72px) + var(--phone-safe-bottom-inset, 0px) + 8px);transform:translate(-50%);z-index:120;display:flex;align-items:center;gap:var(--spacing-sm);padding:8px;background:color-mix(in srgb,var(--bg-secondary) 92%,transparent);border:1px solid var(--border-color);border-radius:999px;box-shadow:var(--shadow-md)}.object-action-btn{min-width:72px;min-height:44px;justify-content:center}.object-action-danger{border-color:color-mix(in srgb,var(--error-red) 60%,var(--border-color))}.btn-icon{padding:var(--spacing-xs);background:transparent;border:none;color:var(--text-secondary);cursor:pointer;font-size:16px;transition:color var(--transition-fast)}.btn-icon:hover{color:var(--text-primary)}.btn-icon:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px;border-radius:var(--radius-sm)}.context-menu{position:fixed;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);padding:var(--spacing-xs) 0;min-width:180px;z-index:1000}.menu-item{padding:var(--spacing-sm) var(--spacing-md);color:var(--text-primary);font-size:13px;cursor:pointer;transition:background var(--transition-fast);display:flex;align-items:center;gap:var(--spacing-sm)}.menu-item:hover{background:var(--accent-blue)}.menu-separator{height:1px;background:var(--border-color);margin:var(--spacing-xs) 0}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:2000;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);min-width:400px;max-width:600px;max-height:80vh;display:flex;flex-direction:column}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-lg);border-bottom:1px solid var(--border-color)}.modal-header h3{font-size:16px;font-weight:600}.modal-content{flex:1;overflow-y:auto;padding:var(--spacing-lg)}.modal-footer{display:flex;align-items:center;justify-content:flex-end;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-lg);border-top:1px solid var(--border-color)}.form-row{margin-bottom:var(--spacing-md)}.form-row label{display:block;font-size:13px;color:var(--text-secondary);margin-bottom:var(--spacing-xs)}.form-row input[type=text],.form-row input[type=number],.form-row select,.form-row textarea{width:100%;padding:var(--spacing-sm);background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px;transition:border-color var(--transition-fast)}.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:none;border-color:var(--border-focus)}.form-row input[type=checkbox]{margin-right:var(--spacing-xs)}.form-row input[type=range]{width:100%}.form-row input[type=color]{width:60px;height:30px;padding:2px;border:1px solid var(--border-color);border-radius:var(--radius-sm);cursor:pointer}.form-row .unit{display:inline-block;margin-left:var(--spacing-xs);font-size:12px;color:var(--text-muted)}.form-row .expression-hint{margin-top:4px;font-size:12px;line-height:1.4;color:var(--text-muted)}.form-row .expression-hint.ok{color:var(--success-green)}.form-row .expression-hint.error{color:var(--error-red)}.form-group{display:flex;gap:var(--spacing-sm);align-items:center}.form-group input{flex:1}.tooltip{position:fixed;background:var(--bg-tertiary);color:var(--text-primary);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);font-size:12px;pointer-events:none;z-index:3000;box-shadow:var(--shadow-md);max-width:200px}.notification{position:fixed;top:80px;right:20px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--spacing-md);box-shadow:var(--shadow-lg);z-index:1500;max-width:300px;animation:slideInRight .3s ease}.notification.success{border-left:4px solid var(--success-green)}.notification.error{border-left:4px solid var(--error-red)}.notification.warning{border-left:4px solid var(--warning-yellow)}.notification.info{border-left:4px solid var(--info-blue)}hr{border:none;border-top:1px solid var(--border-color);margin:var(--spacing-md) 0}.markdown-board{position:absolute;left:80px;top:70px;width:420px;height:320px;display:flex;flex-direction:column;--markdown-font-size: 16px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:20;resize:both;overflow:hidden;min-width:240px;min-height:180px}.markdown-board.sheet-mode{position:fixed;left:0;right:0;bottom:var(--phone-safe-bottom-inset, 0px);top:auto;width:auto;height:min(66vh,520px);min-width:0;min-height:0;resize:none;border-radius:14px 14px 0 0}.markdown-board-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-sm) var(--spacing-md);border-bottom:1px solid 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var(--border-color)}.markdown-board-body{flex:1;overflow:hidden;display:flex;background:var(--bg-primary)}.markdown-input{flex:1;width:100%;height:100%;padding:var(--spacing-md);background:transparent;border:none;outline:none;color:var(--text-primary);font-size:var(--markdown-font-size, 16px);line-height:1.5;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;resize:none;overflow:auto}.markdown-preview{flex:1;width:100%;height:100%;padding:var(--spacing-md);overflow:auto;color:var(--text-primary);font-size:var(--markdown-font-size, 16px);line-height:1.6}.markdown-board.mode-edit .markdown-preview,.markdown-board.mode-preview .markdown-input{display:none}.markdown-board.sheet-mode .markdown-board-header{padding:6px calc(8px + var(--phone-safe-right-inset, 0px)) 6px calc(8px + var(--phone-safe-left-inset, 0px))}.markdown-board.sheet-mode .markdown-font-input{width:60px;min-height:var(--phone-sheet-field-input-height, 44px);height:var(--phone-sheet-field-input-height, 44px);font-size:16px}.markdown-board.sheet-mode .markdown-tab{min-height:var(--phone-sheet-action-btn-height, 44px);justify-content:center}.markdown-board.sheet-mode .btn-icon{min-width:var(--phone-sheet-action-btn-height, 44px);min-height:var(--phone-sheet-action-btn-height, 44px);display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm)}.markdown-board.sheet-mode .markdown-input,.markdown-board.sheet-mode .markdown-preview{padding:10px calc(10px + var(--phone-safe-right-inset, 0px)) 10px calc(10px + var(--phone-safe-left-inset, 0px))}.markdown-preview h1,.markdown-preview h2,.markdown-preview h3,.markdown-preview h4,.markdown-preview h5,.markdown-preview h6{margin:.4em 0 .35em;line-height:1.2}.markdown-preview p{margin:.35em 0}.markdown-preview ul,.markdown-preview ol{padding-left:1.3em;margin:.35em 0}.markdown-preview blockquote{margin:.35em 0;padding:.25em .8em;border-left:3px solid var(--border-color);background:#0000001f}.markdown-preview code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:.92em;padding:1px 4px;border-radius:4px;background:#0000002e}.markdown-preview pre{margin:.45em 0;padding:.75em;border-radius:var(--radius-sm);background:#00000038;overflow:auto}.markdown-preview pre code{padding:0;background:transparent}.markdown-preview a{color:var(--info-blue);text-decoration:underline}.markdown-preview .math-block{margin:.45em 0}.markdown-preview .katex-display{margin:0;overflow-x:auto;overflow-y:hidden}.markdown-preview .katex{font-size:1em}.variables-modal{width:min(760px,92vw);max-width:92vw}.modal-overlay.drawer-host--sheet{align-items:flex-end;justify-content:flex-end;padding-left:0;background:color-mix(in srgb,#000 35%,transparent)}.variables-modal.variables-sheet{width:100vw;max-width:none;min-width:0;max-height:min(68vh,560px);border-radius:14px 14px 0 0;margin:0}.variables-modal.variables-sheet .modal-header .btn-icon{min-width:var(--phone-sheet-action-btn-height, 44px);min-height:var(--phone-sheet-action-btn-height, 44px);display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm)}.variables-modal.variables-sheet .modal-header{padding:10px calc(12px + var(--phone-safe-right-inset, 0px)) 10px calc(12px + var(--phone-safe-left-inset, 0px))}.variables-modal.variables-sheet .modal-content{overflow-x:hidden;padding:12px calc(12px + var(--phone-safe-right-inset, 0px)) 12px calc(12px + var(--phone-safe-left-inset, 0px))}.variables-modal.variables-sheet .variables-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto}.variables-modal.variables-sheet .variables-input{min-height:var(--phone-sheet-field-input-height, 44px);font-size:16px}.variables-modal.variables-sheet .btn{min-height:var(--phone-sheet-action-btn-height, 44px)}.variables-modal.variables-sheet .modal-footer{padding:10px calc(12px + var(--phone-safe-right-inset, 0px)) calc(10px + var(--phone-safe-bottom-inset, 0px)) calc(12px + var(--phone-safe-left-inset, 0px))}.variables-toolbar{display:flex;justify-content:flex-end;margin-bottom:var(--spacing-sm)}.variables-grid{display:grid;grid-template-columns:minmax(180px,1fr) minmax(140px,1fr) auto;gap:var(--spacing-sm);align-items:start}.variables-grid-header{font-size:12px;color:var(--text-secondary);font-weight:600}.variables-input{width:100%;padding:var(--spacing-sm);background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px}.variables-input:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.variables-error,.variables-panel-error{margin-top:4px;color:var(--error-red);font-size:12px}.variables-panel-error{margin-top:var(--spacing-sm)}.selected-object{outline:2px solid var(--accent-blue);outline-offset:2px}.drag-ghost{opacity:.5;filter:brightness(.8)}@media(max-width:600px){.object-action-bar{width:calc(100vw - 16px - var(--phone-safe-left-inset, 0px) - var(--phone-safe-right-inset, 0px));left:calc(8px + var(--phone-safe-left-inset, 0px));transform:none;justify-content:space-between;border-radius:14px}.object-action-btn{flex:1 1 auto;min-width:0}.modal{min-width:unset;width:92vw;max-width:92vw}.notification{right:10px;left:10px;max-width:unset}.markdown-board.sheet-mode{left:0;right:0;width:auto;height:min(70vh,560px)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes slideInLeft{0%{transform:translate(-100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes slideInDown{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes scaleIn{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}@keyframes scaleOut{0%{transform:scale(1);opacity:1}to{transform:scale(0);opacity:0}}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-5px)}20%,40%,60%,80%{transform:translate(5px)}}.fade-in{animation:fadeIn var(--transition-slow)}.fade-out{animation:fadeOut var(--transition-slow)}.slide-in-right{animation:slideInRight var(--transition-slow)}.slide-in-left{animation:slideInLeft var(--transition-slow)}.bounce{animation:bounce .5s ease}.spin{animation:spin 1s linear infinite}.pulse{animation:pulse 1.5s ease-in-out infinite}.scale-in{animation:scaleIn var(--transition-normal)}.shake{animation:shake .5s ease}.transition-all{transition:all 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shellReveal{0%{opacity:0;transform:translateY(12px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes sheetRise{0%{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}@keyframes statusSettle{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.header-mode-strip,.phone-status-strip,.canvas-empty-card{animation:shellReveal .26s cubic-bezier(.22,1,.36,1)}.phone-sheet{animation:sheetRise .24s cubic-bezier(.22,1,.36,1)}.header-action-group,.desktop-scene-settings{animation:statusSettle .22s cubic-bezier(.22,1,.36,1)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}