:root{--geo-primary:#3b82f6;--geo-secondary:#8b5cf6;--geo-success:#10b981;--geo-warning:#f59e0b;--geo-dark:var(--gray-900);--geo-light:var(--gray-100)}.geo-page{min-height:calc(100vh - 200px);padding:1.5rem 0;background:linear-gradient(180deg,var(--gray-50) 0,var(--gray-50) 100%)}.geo-container{max-width:1400px;margin:0 auto;padding:0 1rem}.geo-header{text-align:center;margin-bottom:1.5rem;position:relative}.geo-page:fullscreen{background:#fff;padding:1rem;width:100vw;height:100vh;max-width:none;overflow-y:auto}.geo-page.geometry-tableau{position:fixed;inset:0;z-index:100000;box-sizing:border-box;width:100%;height:100vh;height:100dvh;min-height:0;max-width:none;margin:0;padding:10px;display:flex;flex-direction:column;gap:10px;overflow:hidden}.geo-page.geometry-tableau .geo-header{display:none}.geo-page.geometry-tableau>.geo-container{flex:1;min-height:0;width:100%;max-width:none;padding:0;display:flex;flex-direction:column}.geo-page.geometry-tableau .geo-main{flex:1;min-height:0;grid-template-columns:225px minmax(0,1fr);grid-template-rows:minmax(0,1fr) minmax(0,1fr);gap:10px;align-items:stretch}.geo-page.geometry-tableau .geo-tools{grid-column:1;grid-row:1;overflow-y:auto;padding:10px}.geo-page.geometry-tableau .geo-instructions{grid-column:1;grid-row:2;overflow-y:auto;padding:10px}.geo-page.geometry-tableau .geo-canvas-area{grid-column:2;grid-row:1/-1;display:flex;flex-direction:column;min-height:0;min-width:0}.geo-page.geometry-tableau .canvas-toolbar{flex-wrap:wrap;gap:6px;padding:8px;flex-shrink:0}.geo-page.geometry-tableau .canvas-toolbar>div{display:flex;flex-wrap:wrap;gap:4px}.geo-page.geometry-tableau #canvas-wrapper{height:0;min-height:0;flex:1}.geo-page.geometry-controls-closed .geo-main{grid-template-columns:minmax(0,1fr)}.geo-page.geometry-controls-closed .geo-canvas-area{grid-column:1}.geo-title{font-size:clamp(1.5rem, 4vw, 2.25rem);font-weight:900;background:linear-gradient(135deg,var(--geo-primary),var(--geo-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.geo-subtitle{color:var(--gray-500);font-size:1rem}.geo-main{display:grid;grid-template-columns:280px 1fr 300px;gap:1.5rem;align-items:start}@media screen and (max-width:1200px){.geo-main{grid-template-columns:1fr}}.geo-tools{background:var(--white);border-radius:16px;padding:1.25rem;box-shadow:0 4px 20px rgba(0,0,0,.06)}.geo-instructions h2,.geo-tools h2,.geo-tools h3{font-size:.95rem;font-weight:700;color:var(--geo-dark);margin-bottom:1rem;display:flex;align-items:center;gap:.5rem}.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem}.tool-btn{padding:.875rem .75rem;border:2px solid var(--geo-light);border-radius:12px;background:var(--white);cursor:pointer;transition:all .2s;display:flex;flex-direction:column;align-items:center;gap:.5rem;font-size:.8rem;font-weight:600;color:var(--gray-500)}.tool-btn:hover{border-color:var(--geo-primary);color:var(--geo-primary)}.tool-btn.active{border-color:#1d4ed8;background:rgba(59,130,246,.1);color:#1d4ed8}.tool-btn i{font-size:1.5rem}.geo-canvas-area{background:var(--white);border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,.06);overflow:hidden}.canvas-toolbar{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;background:var(--geo-light);border-bottom:1px solid var(--gray-200)}.canvas-toolbar-left{display:flex;gap:.5rem}.canvas-toolbar-btn{padding:.5rem .75rem;border:none;border-radius:8px;background:var(--white);cursor:pointer;font-size:.85rem;font-weight:600;color:var(--gray-500);display:flex;align-items:center;gap:.4rem;transition:all .2s;min-height:44px}.canvas-toolbar-btn:hover{background:var(--geo-primary);color:#fff}.canvas-toolbar-btn:disabled{opacity:.45;cursor:not-allowed}.canvas-wrapper{position:relative;width:100%;height:500px;background:var(--white);background-image:linear-gradient(rgba(59,130,246,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(59,130,246,.08) 1px,transparent 1px);background-size:20px 20px;cursor:crosshair}#geoCanvas{position:absolute;top:0;left:0;width:100%;height:100%}#geoCanvas:focus-visible{outline:3px solid #f59e0b;outline-offset:-3px}.geo-instructions{background:var(--white);border-radius:16px;padding:1.25rem;box-shadow:0 4px 20px rgba(0,0,0,.06)}.geo-instructions h3{font-size:.95rem;font-weight:700;color:var(--geo-dark);margin-bottom:1rem}.construction-select{width:100%;padding:.75rem;border:2px solid var(--geo-light);border-radius:10px;font-size:.9rem;font-weight:600;margin-bottom:1rem;cursor:pointer}.construction-select:focus{outline:2px solid var(--geo-primary);outline-offset:2px;border-color:var(--geo-primary)}.step-list{display:flex;flex-direction:column;gap:.75rem}.step-empty{text-align:center;padding:2rem;color:#64748b}.step-item{padding:.875rem;border-radius:10px;border:2px solid var(--geo-light);transition:all .2s}.step-item.current{border-color:var(--geo-primary);background:rgba(59,130,246,.05)}.step-item.completed{border-color:var(--geo-success);background:rgba(16,185,129,.05)}.step-item.locked{opacity:.5}.step-header{display:flex;align-items:center;gap:.75rem;margin-bottom:.5rem}.step-number{width:24px;height:24px;border-radius:50%;background:var(--geo-primary);color:#fff;font-size:.75rem;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.step-item.completed .step-number{background:var(--geo-success)}.step-tool{display:inline-flex;align-items:center;gap:.25rem;padding:.2rem .5rem;background:var(--geo-light);border-radius:4px;font-size:.7rem;font-weight:600;color:var(--gray-500)}.step-instruction{font-size:.85rem;color:var(--geo-dark);line-height:1.5}.progress-bar{height:6px;background:var(--geo-light);border-radius:3px;margin-top:1rem;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--geo-primary),var(--geo-secondary));border-radius:3px;transition:width .3s}.geo-btn{width:100%;padding:.875rem;border:none;border-radius:10px;font-size:.95rem;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.5rem;transition:all .2s;margin-top:1rem}.geo-btn-primary{background:linear-gradient(135deg,var(--geo-primary),var(--geo-secondary));color:#fff}.geo-btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(59,130,246,.3)}.geo-btn-success{background:var(--geo-success);color:#fff}.color-options{display:flex;gap:.5rem;margin-top:1rem;flex-wrap:wrap}.color-btn{width:44px;height:44px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:all .2s}.color-btn.active,.color-btn:hover{transform:scale(1.1);border-color:var(--geo-dark)}.thickness-options{display:flex;gap:.5rem;margin-top:.75rem}.thickness-btn{flex:1;padding:.5rem;border:2px solid var(--geo-light);border-radius:8px;background:var(--white);cursor:pointer;display:flex;align-items:center;justify-content:center;min-height:44px}.thickness-btn.active{border-color:var(--geo-primary);background:rgba(59,130,246,.1)}.thickness-line{width:30px;background:var(--geo-dark);border-radius:2px}.grid-size-control{display:flex;align-items:center;gap:.75rem;margin-top:.5rem;min-height:44px}.grid-slider{flex:1;height:6px;-webkit-appearance:none;appearance:none;background:var(--geo-light);border-radius:3px;outline:2px solid transparent;min-height:44px}.grid-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;background:var(--geo-primary);border-radius:50%;cursor:pointer}.grid-slider::-moz-range-thumb{width:18px;height:18px;background:var(--geo-primary);border-radius:50%;cursor:pointer;border:none}.grid-size-label{font-size:.85rem;font-weight:600;color:var(--geo-dark);min-width:45px}.angle-display{position:absolute;background:rgba(59,130,246,.9);color:#fff;padding:4px 8px;border-radius:4px;font-size:.85rem;font-weight:600;pointer-events:none;z-index:100}.virtual-tool{position:absolute;pointer-events:none;opacity:.7;transition:opacity .2s}.virtual-tool.active{opacity:1;pointer-events:auto}@media screen and (max-width:768px){.geo-instructions,.geo-tools{order:2}.geo-canvas-area{order:1}.canvas-wrapper{height:350px}.canvas-toolbar{align-items:stretch;flex-direction:column;gap:.5rem}.canvas-toolbar-left,.canvas-toolbar>div{display:flex;flex-wrap:wrap;gap:.5rem}.canvas-toolbar-btn{flex:1 1 auto;justify-content:center}}.geo-header .tbi-fs-btn{min-width:44px;min-height:44px}@media (prefers-reduced-motion:reduce){.completion-modal *,.geo-page *,.validation-feedback{animation-duration:0s!important;animation-iteration-count:1!important;transition-duration:0s!important;scroll-behavior:auto!important}}@media (pointer:coarse){.tool-btn{padding:1.1rem 1rem;min-height:60px}.color-btn{width:44px;height:44px}.thickness-btn{min-height:50px;padding:.75rem}.canvas-toolbar-btn{padding:.75rem 1rem;min-height:44px}.canvas-wrapper{touch-action:none}}.canvas-toolbar,.geo-tools{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}[data-theme=dark] .geo-page{background:linear-gradient(135deg,#0f172a 0,#1a1f35 100%)!important}[data-theme=dark] .geo-instructions,[data-theme=dark] .geo-tools{background:#1e293b!important;border-color:#334155!important;box-shadow:0 4px 15px rgba(0,0,0,.3)!important}[data-theme=dark] .geo-instructions h2,[data-theme=dark] .geo-tools h2,[data-theme=dark] .geo-tools h3{color:#e2e8f0!important;border-bottom-color:#334155!important}[data-theme=dark] .geo-canvas-area{background:#162032!important}[data-theme=dark] .geo-tool-btn{background:#243044!important;border-color:#334155!important;color:#cbd5e1!important}[data-theme=dark] .geo-tool-btn:hover{background:#2d3d55!important;border-color:#475569!important}[data-theme=dark] .geo-tool-btn.active{background:rgba(99,102,241,.25)!important;border-color:#6366f1!important;color:#a5b4fc!important}[data-theme=dark] .geo-instructions li,[data-theme=dark] .geo-label{color:#94a3b8!important}[data-theme=dark] .geo-input{background:#243044!important;border-color:#334155!important;color:#e2e8f0!important}[data-theme=dark] .geo-header{color:#f1f5f9!important}[data-theme=dark] .geo-subtitle{color:#94a3b8!important}[data-theme=dark] .tool-btn{background:#243044!important;border-color:#334155!important;color:#cbd5e1!important}[data-theme=dark] .tool-btn.active{background:rgba(99,102,241,.25)!important;border-color:#6366f1!important;color:#a5b4fc!important}[data-theme=dark] .step-instruction{color:#cbd5e1!important}