:root{--bg-base: #111215;--bg-surface: #181a1f;--bg-surface-elevated: #22252c;--bg-surface-hover: #2b2f38;--border-subtle: #2d313b;--border-accent: #3b82f6;--text-main: #f3f4f6;--text-muted: #9ca3af;--text-dim: #6b7280;--accent-cyan: #06b6d4;--accent-blue: #3b82f6;--accent-orange: #f59e0b;--accent-green: #10b981;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-base);color:var(--text-main);height:100vh;overflow:hidden;-webkit-font-smoothing:antialiased}.app-container{display:flex;flex-direction:column;height:100vh}.app-header{height:56px;background-color:var(--bg-surface);border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:space-between;padding:0 20px;z-index:10}.header-brand{display:flex;align-items:center;gap:10px}.brand-logo{font-size:20px}.brand-title{font-size:17px;font-weight:700;letter-spacing:-.3px;color:#fff}.brand-badge{font-size:11px;background:#3b82f626;color:var(--accent-blue);padding:2px 8px;border-radius:12px;font-weight:600;border:1px solid rgba(59,130,246,.3)}.header-upload{display:flex;align-items:center;gap:12px}.active-filename{font-size:13px;color:var(--text-muted);max-width:250px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-status{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-dim)}.status-dot{width:8px;height:8px;border-radius:50%;background-color:var(--accent-green);box-shadow:0 0 8px #10b98199}.main-workspace{display:flex;flex:1;overflow:hidden;position:relative}.sidebar-panel{width:380px;background-color:var(--bg-surface);border-right:1px solid var(--border-subtle);display:flex;flex-direction:column;overflow-y:auto;z-index:5}.upload-dropzone{margin:30px 20px;padding:40px 20px;border:2px dashed var(--border-subtle);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:all .2s ease;background:#ffffff03}.upload-dropzone:hover,.upload-dropzone.drag-active{border-color:var(--accent-blue);background:#3b82f60d}.dropzone-icon{font-size:36px;margin-bottom:12px}.upload-dropzone h3{font-size:15px;font-weight:600;margin-bottom:4px}.upload-dropzone p{font-size:13px;color:var(--text-muted);margin-bottom:10px}.dropzone-hint{font-size:11px;color:var(--text-dim);display:block}.model-controls-container{padding:16px 18px 30px;display:flex;flex-direction:column;gap:16px}.panel-section{background:var(--bg-surface-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:14px 16px}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.section-header h4{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted)}.section-sub{font-size:11px;color:var(--text-dim)}.badge{font-size:11px;padding:2px 7px;border-radius:4px;background:#ffffff14;color:var(--text-main);font-weight:500}.badge-accent{background:#f59e0b33;color:var(--accent-orange);border:1px solid rgba(245,158,11,.4)}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.stat-item{background:#0003;padding:8px 10px;border-radius:var(--radius-sm);display:flex;flex-direction:column}.stat-label{font-size:11px;color:var(--text-dim)}.stat-value{font-size:13px;font-weight:600;color:var(--text-main);margin-top:2px}.cylinders-list{display:flex;flex-direction:column;gap:8px;max-height:200px;overflow-y:auto}.cylinder-card{background:#0003;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:10px 12px;cursor:pointer;transition:all .15s ease;display:flex;flex-direction:column;gap:4px}.cylinder-card:hover{background:var(--bg-surface-hover);border-color:var(--accent-cyan)}.cylinder-card.active{border-color:var(--accent-orange);background:#f59e0b1a;box-shadow:0 0 10px #f59e0b33}.cyl-header{display:flex;align-items:center;justify-content:space-between}.cyl-id{font-weight:600;font-size:13px;color:#fff}.cyl-tag{font-size:10px;font-weight:600;text-transform:uppercase;padding:1px 6px;border-radius:4px;background:#06b6d426;color:var(--accent-cyan)}.cyl-details{font-size:11px;color:var(--text-muted);display:flex;gap:12px}.form-group{margin-bottom:12px}.form-group:last-child{margin-bottom:0}.form-row{display:flex;gap:10px;margin-bottom:12px}.form-group.col{flex:1;margin-bottom:0}.label-with-val{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}label{font-size:12px;font-weight:500;color:var(--text-muted)}.param-val{font-size:12px;font-weight:600;color:var(--accent-cyan)}.form-select,.form-input{width:100%;padding:8px 10px;background:#0000004d;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:#fff;font-size:13px;outline:none;transition:border-color .15s ease}.form-select:focus,.form-input:focus{border-color:var(--accent-blue)}.form-range{width:100%;accent-color:var(--accent-cyan);cursor:pointer}.field-hint{font-size:11px;color:var(--text-dim);margin-top:3px;display:block}.grid-solution-box{margin-top:14px;background:#00000040;border-radius:var(--radius-sm);padding:10px 12px;border-left:3px solid var(--accent-cyan)}.solution-header{font-size:11px;text-transform:uppercase;color:var(--text-dim);margin-bottom:4px}.solution-metrics{font-size:13px;font-weight:600;color:#fff}.aspect-badge{font-size:11px;color:var(--accent-green);margin-top:3px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;border-radius:var(--radius-sm);font-size:13px;font-weight:600;cursor:pointer;border:none;transition:all .15s ease;text-decoration:none}.btn-primary{background-color:var(--accent-blue);color:#fff}.btn-primary:hover{background-color:#2563eb}.btn-accent{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;width:100%;box-shadow:0 2px 10px #f59e0b4d}.btn-accent:hover{background:linear-gradient(135deg,#fbbf24,#f59e0b)}.btn-success{background:linear-gradient(135deg,#10b981,#059669);color:#fff;width:100%;box-shadow:0 2px 10px #10b9814d}.btn-success:hover{background:linear-gradient(135deg,#34d399,#10b981)}.input-with-unit{display:flex;align-items:center;gap:4px}.form-input-inline{width:60px;padding:3px 6px;background:#0006;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--accent-cyan);font-size:12px;font-weight:600;text-align:right;outline:none}.form-input-inline:focus{border-color:var(--accent-cyan)}.unit-label{font-size:11px;color:var(--text-dim)}.actions-button-grid{display:flex;flex-direction:column;gap:8px}.btn-secondary{background:#3b82f626;border:1px solid rgba(59,130,246,.4);color:#93c5fd;width:100%}.btn-secondary:hover{background:#3b82f640;border-color:var(--accent-blue);color:#fff}.btn-large{padding:12px 16px;font-size:14px}.btn-glass{background:#181a1fbf;backdrop-filter:blur(8px);color:var(--text-main);border:1px solid rgba(255,255,255,.1)}.btn-glass:hover{background:#22252ce6;border-color:#fff3}.progress-container{margin-top:10px}.progress-bar{width:100%;height:6px;background:#ffffff1a;border-radius:3px;overflow:hidden}.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent-cyan),var(--accent-orange));transition:width .3s ease;animation:pulse-fill 1.5s infinite}@keyframes pulse-fill{0%{opacity:.8}50%{opacity:1}to{opacity:.8}}.progress-text{font-size:11px;color:var(--text-dim);display:block;margin-top:4px;text-align:center}.download-card{border-color:#10b9814d;background:#10b9810d}.download-header{display:flex;align-items:center;gap:10px;margin-bottom:12px}.download-icon{font-size:24px}.download-header h4{font-size:13px;font-weight:600;color:#fff}.download-header p{font-size:11px;color:var(--text-muted)}.viewport-panel{flex:1;position:relative;background-color:var(--bg-base)}.canvas-container{width:100%;height:100%}.viewport-overlay{position:absolute;pointer-events:none;z-index:5}.viewport-overlay button{pointer-events:auto}.viewport-overlay.top-left{top:16px;left:16px}.viewport-overlay.top-right{top:16px;right:16px;display:flex;gap:8px}.viewport-overlay.bottom-right{bottom:16px;right:16px}.view-mode-pill{background:#181a1fbf;backdrop-filter:blur(8px);padding:6px 12px;border-radius:20px;border:1px solid rgba(255,255,255,.1);font-size:12px;font-weight:500;color:var(--text-muted)}.interaction-hint{background:#181a1fbf;backdrop-filter:blur(8px);padding:6px 12px;border-radius:20px;border:1px solid rgba(255,255,255,.1);font-size:11px;color:var(--text-dim)}.face-tooltip{position:absolute;pointer-events:none;background:#111215e6;backdrop-filter:blur(6px);border:1px solid var(--accent-cyan);color:#fff;padding:6px 10px;border-radius:var(--radius-sm);font-size:11px;z-index:20;transform:translate(12px,12px);box-shadow:0 4px 14px #0006}.fullscreen-dropzone{position:fixed;inset:0;background:#111215eb;backdrop-filter:blur(10px);z-index:1000;display:flex;align-items:center;justify-content:center;border:4px dashed var(--accent-blue);pointer-events:none}.fullscreen-drop-content{text-align:center;color:#fff}.fullscreen-drop-icon{font-size:64px;display:block;margin-bottom:16px;animation:bounce-icon 1s infinite alternate}@keyframes bounce-icon{0%{transform:translateY(0)}to{transform:translateY(-12px)}}.fullscreen-drop-content h2{font-size:24px;margin-bottom:8px}.fullscreen-drop-content p{color:var(--text-muted);font-size:15px}.auto-preview-indicator{display:flex;align-items:center;gap:6px;margin-top:8px;font-size:11px;color:var(--text-dim);justify-content:center}.auto-preview-dot{width:6px;height:6px;border-radius:50%;background:var(--accent-green);box-shadow:0 0 6px var(--accent-green)}.tool-group{display:flex;gap:4px;background:#181a1fbf;backdrop-filter:blur(8px);padding:3px;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,.1)}.tool-group .btn-glass{background:transparent;border:none;padding:6px 10px}.tool-group .btn-glass:hover{background:#ffffff1a}.tool-group .btn-glass.active{background:var(--accent-blue);color:#fff;border:1px solid var(--accent-cyan)}.btn-icon-only{padding:6px 8px!important;font-size:11px!important;font-weight:700}.lay-face-banner{position:absolute;top:60px;left:50%;transform:translate(-50%);background:#3b82f6f2;backdrop-filter:blur(8px);color:#fff;padding:8px 18px;border-radius:20px;font-size:12px;font-weight:600;box-shadow:0 4px 16px #0006;z-index:30;pointer-events:none}#save-project-btn-header{border-color:#f59e0b66;color:#fbbf24;font-weight:600;padding:8px 14px}#save-project-btn-header:hover{background:#f59e0b26;border-color:#f59e0b}#save-project-btn{border-color:#f59e0b59;color:#fbbf24;font-weight:600}#save-project-btn:hover{background:#f59e0b26;border-color:#f59e0b}