.mode-toggle-container{display:flex;gap:10px;margin-bottom:1.5rem}.mode-toggle-btn{flex:1;padding:12px;border:2px solid #667eea;border-radius:12px;background:#fff;color:#667eea;font-family:'Poppins',sans-serif;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.mode-toggle-btn:hover{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;transform:translateY(-2px);box-shadow:0 4px 15px rgba(102,126,234,.3)}.mode-toggle-btn.active{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;box-shadow:0 4px 15px rgba(102,126,234,.3)}.vector-input-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:10px}.vector-input-grid.mode-2d{grid-template-columns:repeat(2,1fr)}.component-input-wrapper{display:flex;flex-direction:column;gap:5px}.vector-input-grid.mode-2d .z-component{display:none !important}.component-label{font-family:'Poppins',sans-serif;font-size:.9rem;font-weight:600;color:#667eea;text-align:center}.operation-selector{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:1rem}.operation-btn{padding:10px;border:2px solid #48bb78;border-radius:10px;background:#fff;color:#48bb78;font-family:'Roboto Mono',monospace;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s ease}.operation-btn:hover{background:#48bb78;color:#fff;transform:scale(1.02)}.operation-btn.active{background:#48bb78;color:#fff;box-shadow:0 3px 12px rgba(72,187,120,.3)}.operation-btn:disabled{opacity:.4;cursor:not-allowed;background:#f0f0f0;color:#999;border-color:#ddd}.operation-btn:disabled:hover{transform:none}.result-section{margin-top:1.5rem}.result-item{display:flex;justify-content:space-between;align-items:center;padding:12px 15px;margin-bottom:10px;background:linear-gradient(135deg,rgba(102,126,234,.05) 0%,rgba(118,75,162,.05) 100%);border-radius:10px;border-left:4px solid #667eea}.result-label{font-family:'Poppins',sans-serif;font-size:1rem;font-weight:500;color:#555}.result-value{font-family:'Roboto Mono',monospace;font-size:1.1rem;font-weight:700;color:#667eea}.result-value.highlight{font-size:1.3rem;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.visualization-container{margin-top:1.5rem}#vectorCanvas{width:100%;height:400px;border-radius:12px;background:linear-gradient(135deg,#f5f7fa 0%,#e8ecf1 100%);box-shadow:inset 0 2px 10px rgba(0,0,0,.05)}#vectorCanvas3D{width:100%;height:500px;border-radius:12px;background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);box-shadow:0 8px 32px rgba(0,0,0,.2)}.calculation-steps{margin-top:1rem}.step-item{padding:12px 15px;margin-bottom:10px;background:rgba(72,187,120,.05);border-radius:10px;border-left:3px solid #48bb78}.step-label{font-family:'Poppins',sans-serif;font-size:.95rem;font-weight:600;color:#48bb78;margin-bottom:5px}.step-formula{font-family:'Roboto Mono',monospace;font-size:.9rem;color:#555;padding:8px;background:#fff;border-radius:6px;overflow-x:auto}.relationship-indicator{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;margin-left:10px;background:linear-gradient(135deg,#48bb78 0%,#38a169 100%);color:#fff;border-radius:20px;font-family:'Poppins',sans-serif;font-size:.85rem;font-weight:600}.relationship-indicator.perpendicular{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%)}.relationship-indicator.parallel{background:linear-gradient(135deg,#f59e0b 0%,#f97316 100%)}@media(max-width:992px){.vector-input-grid{grid-template-columns:1fr;gap:12px}.vector-input-grid.mode-2d{grid-template-columns:1fr}}@media(max-width:768px){.operation-selector{grid-template-columns:1fr}.result-item{flex-direction:column;gap:8px;text-align:center}#vectorCanvas{height:300px}#vectorCanvas3D{height:350px}}@media(max-width:576px){.mode-toggle-container{flex-direction:column}.component-label{font-size:.85rem}.operation-btn{font-size:.85rem;padding:8px}}