:root{--bg:#e9edf2;--panel:#fff;--ink:#17202a;--muted:#687386;--line:#d8dee8;--dark:#111827;--accent:#c98d3c;--accent2:#e8b86f;--good:#1f7a4c;--shadow:0 10px 28px rgba(17,24,39,.09);--radius:12px}
*{box-sizing:border-box}html,body{height:100%;margin:0}body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);overflow:hidden}.app{height:100%;display:grid;grid-template-rows:68px 1fr 34px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 18px;background:#fff;border-bottom:1px solid var(--line);z-index:10}.brand{display:flex;align-items:center;gap:11px;min-width:220px}.brand-mark{width:40px;height:40px;border-radius:10px;background:linear-gradient(145deg,#1f2937,#0b0f17);color:#fff;display:grid;place-items:center;font-weight:800;letter-spacing:-.5px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)}.brand-title{font-weight:800;font-size:17px;line-height:1.05}.brand-subtitle{font-size:11px;color:var(--muted);margin-top:4px}.top-actions{display:flex;gap:8px;align-items:center}.btn{appearance:none;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:700;border-radius:9px;padding:9px 13px;cursor:pointer;transition:.15s ease}.btn:hover:not(:disabled){border-color:#aeb7c5;transform:translateY(-1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--dark);border-color:var(--dark);color:white}.btn-strong{background:#f6efe5;border-color:#e6c79c;color:#6f4717}.btn-large{padding:12px 18px}.workspace{min-height:0;display:grid;grid-template-columns:202px minmax(0,1fr) 268px;gap:10px;padding:10px}.sidebar{min-height:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px;overflow:auto}.panel-heading{font-size:12px;text-transform:uppercase;letter-spacing:.1em;font-weight:800;color:#4b5563;margin:3px 5px 11px}.panel-label{font-size:10px;text-transform:uppercase;letter-spacing:.1em;font-weight:800;color:#9aa3b2;margin:10px 7px 5px}.panel-separator{height:1px;background:var(--line);margin:11px 4px}.tool{width:100%;border:0;background:transparent;display:grid;grid-template-columns:24px 1fr auto;align-items:center;text-align:left;gap:6px;padding:9px 8px;border-radius:8px;color:#364152;font-weight:650;cursor:pointer}.tool span{font-size:17px;text-align:center}.tool em{font-style:normal;font-size:9px;color:#98a2b3}.tool.active{background:#f1f3f6;color:#111827}.tool:disabled{opacity:.52;cursor:not-allowed}.viewport-wrap{position:relative;min-width:0;min-height:0;background:#cfd6df;border:1px solid #c3cad4;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.viewport{position:absolute;inset:0}.viewport canvas{display:block;width:100%;height:100%;outline:0}.drop-zone{position:absolute;inset:0;z-index:5;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 50% 40%,rgba(255,255,255,.9),rgba(233,237,242,.74) 50%,rgba(207,214,223,.76));transition:.15s ease}.drop-zone.dragging{background:rgba(232,184,111,.24);outline:3px dashed rgba(157,101,31,.55);outline-offset:-15px}.drop-card{max-width:470px;text-align:center;background:rgba(255,255,255,.93);border:1px solid rgba(198,206,217,.95);border-radius:18px;padding:34px 38px;box-shadow:0 24px 60px rgba(35,43,55,.14)}.drop-icon{width:58px;height:58px;margin:0 auto 14px;border-radius:16px;display:grid;place-items:center;background:#f3eadc;color:#946020;font-size:28px}.drop-card h1{font-size:23px;margin:0 0 9px}.drop-card p{color:var(--muted);line-height:1.5;margin:0 auto 18px}.drop-card small{display:block;color:#8b95a4;margin-top:12px}.view-toolbar{position:absolute;top:12px;left:50%;transform:translateX(-50%);z-index:4;display:flex;background:rgba(255,255,255,.9);border:1px solid rgba(205,211,220,.95);border-radius:9px;padding:3px;box-shadow:0 6px 20px rgba(17,24,39,.08);backdrop-filter:blur(10px)}.view-btn{border:0;background:transparent;padding:6px 8px;font-size:10px;font-weight:750;color:#515c6c;border-radius:6px;cursor:pointer}.view-btn:hover{background:#eef1f5}.viewport-hint{position:absolute;left:12px;bottom:11px;z-index:3;background:rgba(17,24,39,.76);color:#fff;border-radius:7px;padding:6px 9px;font-size:10px;backdrop-filter:blur(8px)}.loading{position:absolute;z-index:8;top:14px;right:14px;background:#111827;color:white;border-radius:8px;padding:9px 11px;font-size:11px;font-weight:700}.empty-properties{font-size:12px;line-height:1.55;color:var(--muted);padding:7px 5px}.property-group{padding:12px 3px;border-top:1px solid var(--line)}.property-group:first-child{border-top:0;padding-top:2px}.property-title{font-size:10px;text-transform:uppercase;letter-spacing:.09em;font-weight:850;color:#8a94a3;margin-bottom:8px}.property-row{display:flex;justify-content:space-between;gap:12px;padding:5px 0;font-size:11px;color:#6b7280}.property-row strong{color:#263142;font-size:11px;max-width:145px;text-align:right;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.dimension-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:5px}.dimension-grid label{background:#f4f6f8;border:1px solid #e2e6ec;border-radius:7px;padding:7px;font-size:10px;color:#7a8493}.dimension-grid strong{display:block;color:#263142;margin-top:3px;font-size:11px}.property-note{font-size:9px;line-height:1.45;color:#9aa3b2;margin-top:8px}.status-good{color:var(--good)!important}.toggle-row{display:flex;justify-content:space-between;align-items:center;padding:5px 0;font-size:11px;color:#616b7b}.toggle-row input{accent-color:#9b6a2a}.statusbar{height:34px;display:flex;justify-content:space-between;align-items:center;padding:0 13px;background:#fff;border-top:1px solid var(--line);font-size:10px;color:#6c7685}.status-right{display:flex;gap:16px}.toast{position:fixed;z-index:100;left:50%;bottom:48px;transform:translateX(-50%);background:#111827;color:#fff;border-radius:9px;padding:10px 14px;font-size:12px;box-shadow:0 14px 35px rgba(17,24,39,.25)}
@media(max-width:900px){body{overflow:auto}.app{min-height:100%;height:auto;grid-template-rows:auto 1fr 34px}.topbar{min-height:68px;align-items:flex-start;padding:10px;flex-direction:column}.top-actions{width:100%;overflow:auto;padding-bottom:2px}.workspace{grid-template-columns:1fr;grid-template-rows:minmax(480px,70vh) auto}.left-panel{display:none}.viewport-wrap{grid-row:1}.right-panel{grid-row:2}.view-toolbar{left:10px;transform:none;right:10px;overflow:auto}.viewport-hint{display:none}.brand-subtitle{display:none}}
/* Phase 1B / 2A precision controls — shared ModelFlow component styles */
.input-grid{display:grid;gap:5px}.input-grid.three,.button-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.input-grid label{font-size:9px;color:#7a8493}.input-grid input{width:100%;margin-top:4px;border:1px solid #dfe4eb;background:#f7f8fa;border-radius:7px;padding:7px 6px;font:inherit;font-size:10px;color:#263142;outline:none}.input-grid input:focus{border-color:#ad7a36;box-shadow:0 0 0 2px rgba(201,141,60,.12);background:#fff}.button-grid{display:grid;gap:5px}.mini-btn{border:1px solid #dfe4eb;background:#f7f8fa;color:#344052;border-radius:7px;padding:7px 6px;font-size:9px;font-weight:750;cursor:pointer}.mini-btn:hover{background:#eef1f5;border-color:#c8d0db}.mini-btn.full{width:100%;margin-top:6px}.toggle-row.compact{margin-top:7px;padding-bottom:0}.measure-badge{position:absolute;z-index:4;left:50%;bottom:12px;transform:translateX(-50%);background:rgba(255,255,255,.94);border:1px solid rgba(205,211,220,.98);border-radius:8px;padding:7px 10px;font-size:10px;font-weight:750;color:#303b4b;box-shadow:0 6px 20px rgba(17,24,39,.1);backdrop-filter:blur(10px)}
@media(max-width:900px){.input-grid.three,.button-grid.three{grid-template-columns:repeat(3,1fr)}}
/* Phase 2B — shared precision/orientation components */
.input-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.preset-grid{margin-top:7px}.snap-preset.active{background:#f3eadc;border-color:#dfbf91;color:#704819}.segmented{display:grid;grid-template-columns:1fr 1fr;margin-top:8px;border:1px solid #dfe4eb;border-radius:8px;padding:2px;background:#f7f8fa}.segment{border:0;background:transparent;border-radius:6px;padding:6px;font-size:9px;font-weight:800;color:#737e8e;cursor:pointer}.segment.active{background:#fff;color:#263142;box-shadow:0 1px 4px rgba(17,24,39,.09)}
@media(max-width:900px){.input-grid.two{grid-template-columns:1fr 1fr}}
/* Phase 3A — primitive creation and object selection */
.object-list{display:grid;gap:5px;max-height:160px;overflow:auto}.object-item{width:100%;display:grid;grid-template-columns:24px 1fr;gap:7px;align-items:center;text-align:left;border:1px solid #e0e5eb;background:#f7f8fa;border-radius:8px;padding:7px;cursor:pointer;color:#344052}.object-item:hover{background:#f0f3f6}.object-item.active{background:#f3eadc;border-color:#dfbf91;color:#704819}.object-index{width:22px;height:22px;border-radius:6px;background:#e8edf3;display:grid;place-items:center;font-size:9px;font-weight:850}.object-item.active .object-index{background:#fff1dc}.object-item strong{display:block;font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.object-item small{display:block;margin-top:2px;font-size:8px;color:#8893a2}.object-actions{margin-top:7px}.mini-btn.danger{color:#8a3030;background:#fff7f7;border-color:#efd7d7}.mini-btn:disabled{opacity:.45;cursor:not-allowed}.segmented.three-way{grid-template-columns:repeat(3,1fr)}.shape-fields{margin-top:8px}.input-grid.one{grid-template-columns:1fr}.full-width{width:100%;margin-top:9px}.tool[data-tool="shape"].active{background:#f3eadc;color:#704819}.property-group[hidden],.shape-fields[hidden]{display:none!important}
/* Phase 3B — subtractive feature preview components */
.feature-preview-card{background:linear-gradient(180deg,#fff,#fffaf8);border-left:3px solid #d49a72;padding-left:9px!important}
.feature-warning{margin-top:8px;border:1px solid #efd6c7;background:#fff7f2;color:#85533b;border-radius:7px;padding:7px 8px;font-size:9px;line-height:1.45}
.tool[data-tool="hole"].active,.tool[data-tool="cut"].active{background:#fff0ea;color:#8a4935}
.object-item:has(small){transition:background .12s ease,border-color .12s ease}
input:disabled{opacity:.55;cursor:not-allowed}
/* v0.6.0 — shared navigation link treatment */
.btn-link{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;white-space:nowrap}

/* v0.7.0 — Boolean subtraction foundation */
.boolean-card .property-row { margin-bottom: 8px; }
.boolean-card .btn { margin-top: 8px; }