:root{--bg: #0e0f12;--card: #171923;--panel: #0f1117;--text: #e6e6e6;--muted: #a0a0a0;--accent: #4ea1ff}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica Neue,Arial,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg);color:var(--text)}.app-header{padding:20px;text-align:center}.subtitle{color:var(--muted);margin-top:6px}.header-actions{margin-top:16px;display:flex;gap:12px;justify-content:center}.header-button{background:var(--card);border:1px solid var(--border);color:var(--text);padding:8px 16px;border-radius:6px;cursor:pointer;font-size:14px;transition:background-color .2s}.header-button:hover{background:var(--hover)}.app{display:grid;grid-template-columns:360px 1fr;gap:16px;padding:16px}.controls{background:var(--card);border:1px solid #222638;border-radius:10px;padding:16px;position:sticky;top:12px;height:fit-content;z-index:2}.control{margin-bottom:14px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid #364064}.section-header h3{margin:0;color:var(--text);font-size:16px;font-weight:600}.reset-button{display:flex;align-items:center;gap:6px;background:#2a2f43;color:#e6e6e6;border:1px solid #364064;padding:6px 12px;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;transition:all .2s ease}.reset-button:hover{background:#364064;transform:translateY(-1px)}.reset-icon{font-size:14px;font-weight:700}.control label{display:block;margin-bottom:6px;color:var(--muted)}.control input[type=number],.control select{width:100%;padding:6px 8px;border-radius:6px;border:1px solid #2a2f43;background:#0f1117;color:var(--text)}.range-row{display:grid;grid-template-columns:1fr 96px;gap:8px;align-items:center}.range-row input[type=range]{width:100%}.actions{margin-top:16px;display:flex;gap:8px}button{background:var(--accent);color:#001a33;border:none;border-radius:8px;padding:10px 12px;font-weight:600;cursor:pointer}button:hover{filter:brightness(1.05)}.preview{background:var(--panel);border:1px solid #222638;border-radius:10px;padding:12px}.preview-inner{background:#0a0b0f;border-radius:8px;padding:10px;min-height:600px;display:grid;grid-template-rows:auto 1fr;gap:8px}.preview-inner--layout{min-height:0;grid-template-rows:auto auto}.preview-inner:has(.panel-info-container){grid-template-rows:auto auto 1fr}.preview-inner--layout .svg-host{height:auto;max-height:50vh}.preview-toolbar{display:flex;align-items:center;gap:8px;justify-content:center}.preview-toolbar button{background:#2a2f43;color:#e6e6e6;border:1px solid #364064;padding:4px 10px;border-radius:6px;font-weight:600}.preview-toolbar button:hover{filter:brightness(1.1)}.preview-toolbar input[type=range]{width:200px}.zoom-label{color:var(--muted);min-width:48px;text-align:right}.material-info-container{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;border-top:1px solid #364064;margin-top:8px;gap:20px}.material-dimensions{display:flex;align-items:center;gap:8px}.dimensions-label{color:var(--muted);font-size:14px}.dimensions-value{color:#60a5fa;font-weight:600;font-size:14px}.material-utilization{display:flex;align-items:center;gap:8px}.utilization-label{color:var(--muted);font-size:14px}.utilization-value{color:#4ade80;font-weight:600;font-size:16px;margin-left:4px}.panel-info-container{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;border-top:1px solid #364064;margin-top:8px;gap:20px}.panel-side-length{display:flex;align-items:center;gap:8px}.panel-side-label{color:var(--muted);font-size:14px}.panel-side-value{color:#60a5fa;font-weight:600;font-size:14px}.panel-stitched-length{display:flex;align-items:center;gap:8px}.panel-stitched-label{color:var(--muted);font-size:14px}.panel-stitched-value{color:#fbbf24;font-weight:600;font-size:14px}.panel-side-radius{display:flex;align-items:center;gap:8px}.panel-radius-label{color:var(--muted);font-size:14px}.panel-radius-value{color:#34d399;font-weight:600;font-size:14px}.svg-host{width:100%;overflow:auto;background:#0a0b0f;height:100%}.svg-wrap{display:inline-block;transform-origin:top left}.app-footer{text-align:center;color:var(--muted);padding:10px 0 24px}@media (max-width: 960px){.app{grid-template-columns:1fr}.controls{position:static;top:auto;z-index:auto}.preview{position:relative;z-index:1}.preview-inner--layout{min-height:0;grid-template-rows:auto auto}.preview-inner--layout .svg-host{max-height:55vh}}@media (min-width: 1800px){.app-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:16px}.app{padding:0}.controls{max-width:400px}}.hidden{display:none!important}.switch-row{display:flex;align-items:center;gap:10px}.switch-label{color:var(--muted);font-size:.9rem}.switch{position:relative;display:inline-block;width:44px;height:24px}.switch input{opacity:0;width:0;height:0}.switch .slider{position:absolute;cursor:pointer;top:0;right:0;bottom:0;left:0;background:#2a2f43;border-radius:999px;transition:background .2s;box-shadow:inset 0 0 0 1px #1f2333}.switch .slider:before{content:"";position:absolute;width:18px;height:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:transform .2s}.switch input:checked+.slider{background:var(--accent);box-shadow:inset 0 0 0 1px #2b80d6}.switch input:checked+.slider:before{transform:translate(20px)}details.advanced{border:1px solid #2a2f43;border-radius:8px;background:#10131a;padding:6px 8px;transition:border-color .2s}details.advanced:hover{border-color:#364064}details.advanced summary{cursor:pointer;list-style:none;font-weight:600;color:var(--muted);display:flex;align-items:center;justify-content:space-between;-webkit-user-select:none;user-select:none;transition:color .2s}details.advanced summary:hover{color:var(--text)}details.advanced summary:after{content:"▼";font-size:10px;transition:transform .2s;color:var(--accent)}details.advanced[open] summary{color:var(--text)}details.advanced[open] summary:after{transform:rotate(-180deg)}details.advanced summary::-webkit-details-marker{display:none}details.advanced .advanced-content{margin-top:8px}.tooltip-container{position:relative;display:inline-flex;align-items:center;gap:6px}.tooltip-icon{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;background:var(--muted);color:var(--bg);font-size:11px;font-weight:700;cursor:help;transition:background 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