:root{color-scheme:light;--bg:#f6f7f4;--panel:#fff;--ink:#20242a;--muted:#67707c;--line:#dce0dc;--accent:#1f7a68;--accent-strong:#155d50;--warning:#b45309;--danger:#b42318;--shadow:0 22px 55px rgba(33,43,54,.12)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input{font:inherit}.app-shell{display:grid;grid-template-columns:minmax(360px,520px) minmax(0,1fr);gap:18px;min-height:100vh;padding:18px}.control-panel,.workspace{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow)}.control-panel{display:flex;flex-direction:column;gap:20px;padding:22px;overflow:auto}.panel-header,.section-title,.action-row,.status-bar,.viewer-controls{display:flex;align-items:center;justify-content:space-between;gap:14px}.eyebrow{margin:0 0 6px;color:var(--accent);font-size:.78rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1,h2,p{margin:0}h1{font-size:clamp(1.55rem,2vw,2.25rem);line-height:1.05}h2{font-size:1.05rem}form,fieldset{display:grid;gap:18px}fieldset{margin:0;padding:0;border:0}legend{margin-bottom:10px;font-weight:800}label{display:grid;gap:7px;color:var(--muted);font-size:.86rem;font-weight:700}input{width:100%;min-width:0;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);padding:10px 11px}input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(31,122,104,.14);outline:0}.items-list{display:grid;gap:10px}.item-row,.container-row{display:grid;gap:8px;align-items:end;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fbfcfb}.item-row{grid-template-columns:minmax(82px,1.2fr) repeat(4,minmax(54px,.8fr)) 38px}.container-row{grid-template-columns:minmax(92px,1.15fr) repeat(6,minmax(48px,.7fr)) 38px}.item-row label,.container-row label{font-size:.72rem}.container-row .upper-field{color:#52606d}.icon-button,.remove-button{display:inline-grid;place-items:center;width:38px;height:38px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);cursor:pointer}.remove-button{color:var(--danger)}.text-button,.primary-button,.secondary-button,.tab-button{min-height:42px;border:0;border-radius:8px;padding:0 14px;font-weight:800;cursor:pointer}.text-button{background:#e8f2ef;color:var(--accent-strong)}.primary-button{flex:1;background:var(--accent);color:#fff}.secondary-button{background:#eef0ee;color:var(--ink)}.workspace{display:grid;grid-template-rows:auto auto minmax(420px,1fr) auto;min-width:0;overflow:hidden}.status-bar{padding:18px 20px;border-bottom:1px solid var(--line)}.fit-label{font-size:1.05rem;font-weight:900}.fit-detail{margin-top:4px;color:var(--muted);font-size:.92rem}.stat-cluster{display:flex;gap:10px}.stat-cluster div{min-width:102px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:#fbfcfb;text-align:right}.stat-cluster span{display:block;font-weight:900}.stat-cluster small{color:var(--muted)}.container-tabs{display:flex;gap:8px;overflow:auto;padding:10px 20px;border-bottom:1px solid var(--line);background:#fbfcfb}.tab-button{background:#eef0ee;color:var(--ink);white-space:nowrap}.tab-button.active{background:var(--accent);color:#fff}.tab-button.empty{color:var(--muted)}.viewer-shell{position:relative;min-height:420px;background:#edf1ed}canvas{display:block;width:100%;height:100%}.viewer-controls{position:absolute;right:14px;bottom:14px;left:14px;padding:12px;border:1px solid rgba(255,255,255,.72);border-radius:8px;background:rgba(255,255,255,.88);backdrop-filter:blur(10px)}.viewer-controls label{flex:1;color:var(--ink)}.viewer-controls input{padding:0}.results-panel{display:grid;gap:10px;max-height:250px;overflow:auto;padding:16px 20px 20px;border-top:1px solid var(--line)}.placements{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:8px}.placement-card{border:1px solid var(--line);border-radius:8px;padding:10px;background:#fbfcfb}.placement-card strong{display:block;margin-bottom:4px}.placement-card span{color:var(--muted);font-size:.87rem}.success{color:var(--accent-strong)}.failure{color:var(--danger)}.partial{color:var(--warning)}@media(max-width:1080px){.app-shell{grid-template-columns:1fr}.workspace{min-height:790px}}@media(max-width:760px){.app-shell{padding:0}.control-panel,.workspace{border-width:0 0 1px;box-shadow:none}.item-row,.container-row{grid-template-columns:1fr}.viewer-controls,.status-bar{align-items:stretch;flex-direction:column}.stat-cluster{width:100%}.stat-cluster div{flex:1;text-align:left}}