:root{--ink:#17202a;--muted:#687383;--line:#dfe4e8;--paper:#fff;--canvas:#f2f4f5;--blue:#2864dc;--blue-soft:#eaf1ff;--teal:#087e78;--amber:#b46b07;--red:#b53b45;--shadow:0 18px 55px rgba(25,34,45,.10)}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font:15px/1.45 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}.topbar{height:72px;background:#122030;color:white;display:flex;align-items:center;justify-content:space-between;padding:0 30px;box-shadow:0 1px 0 rgba(255,255,255,.1)}.brand{display:flex;gap:12px;align-items:center;color:white;text-decoration:none}.brand-mark{display:grid;place-items:center;width:38px;height:38px;background:#f1b740;color:#17202a;font:bold 20px Georgia;border-radius:11px}.brand span:last-child{display:flex;flex-direction:column}.brand small,.course{color:#aeb9c7;font-size:12px}.course{display:flex;gap:22px}.status-dot:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:#53d398;margin-right:7px}.workspace{display:grid;grid-template-columns:230px minmax(0,1fr);min-height:calc(100vh - 72px)}.sidebar{padding:30px 18px;background:#f8f9fa;border-right:1px solid var(--line)}.eyebrow{text-transform:uppercase;letter-spacing:.11em;font-size:10px;font-weight:800;color:var(--muted);margin:0 0 12px}.nav-item{width:100%;border:0;background:transparent;text-align:left;padding:12px;border-radius:10px;color:var(--ink);cursor:pointer;display:grid;grid-template-columns:28px 1fr;font-weight:700}.nav-item span{color:#9aa3ad}.nav-item small{grid-column:2;color:var(--muted);font-weight:500}.nav-item.active{background:white;color:var(--blue);box-shadow:0 5px 20px rgba(25,34,45,.08)}.legend{margin-top:36px;padding:16px 12px;border-top:1px solid var(--line);display:grid;gap:10px}.legend p{margin-bottom:2px}.legend span{font-size:12px;color:var(--muted)}.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:8px}.boundary{background:var(--blue)}.control{background:var(--amber)}.entity{background:var(--teal)}.stage{padding:34px clamp(20px,4vw,60px);max-width:1400px;width:100%;margin:0 auto}.stage-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:20px}.stage-heading h1{font:700 clamp(28px,3vw,42px)/1.1 Georgia,serif;margin:0}.view-switch{padding:4px;background:#e3e7ea;border-radius:10px}.view-switch button{border:0;padding:8px 14px;border-radius:7px;background:transparent;color:var(--muted);cursor:pointer}.view-switch button.active{background:white;color:var(--ink);box-shadow:0 2px 8px rgba(0,0,0,.08)}.view{display:none}.view.active{display:block}.browser-frame{background:white;border:1px solid #d5dbe0;border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}.browser-bar{height:42px;background:#edf0f2;display:flex;align-items:center;gap:7px;padding:0 14px;border-bottom:1px solid var(--line)}.browser-bar>span{width:9px;height:9px;border-radius:50%;background:#bec5cb}.browser-bar>span:first-child{background:#e2766f}.browser-bar p{margin:auto;color:#89939d;font-size:12px}.app-shell{min-height:520px}.actionbar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 26px;border-bottom:1px solid var(--line)}.actionbar button{border:1px solid var(--line);background:white;padding:9px 14px;border-radius:7px;margin-right:8px;font-weight:700;cursor:pointer}.actionbar button.primary{background:var(--blue);border-color:var(--blue);color:white}.record-state{font-size:11px;font-weight:800;letter-spacing:.08em;color:var(--blue);background:var(--blue-soft);padding:7px 10px;border-radius:20px}.screen{display:none;padding:30px}.screen.active{display:block}.form-title{display:flex;align-items:baseline;gap:12px;margin-bottom:25px}.form-title span{font-size:13px;color:var(--muted)}.form-title strong{font:700 26px Georgia,serif}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 26px}.form-grid label{color:var(--muted);font-size:12px;font-weight:700}.form-grid input,.form-grid select{display:block;width:100%;margin-top:6px;padding:10px;border:1px solid var(--line);border-radius:6px;background:white;color:var(--ink)}.tabs{margin-top:30px;border-bottom:1px solid var(--line)}.tabs button{border:0;background:transparent;padding:10px 2px;margin-right:24px;color:var(--muted)}.tabs button.active{color:var(--blue);border-bottom:2px solid var(--blue);font-weight:700}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:13px}th{text-align:left;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.06em}th,td{padding:13px 10px;border-bottom:1px solid var(--line)}.text-button{border:0;background:transparent;color:var(--blue);padding:14px 10px;cursor:pointer}.totals{margin-left:auto;width:min(330px,100%);display:grid;gap:7px;padding-top:12px}.totals span,.totals strong{display:flex;justify-content:space-between}.totals strong{font-size:17px;border-top:1px solid var(--line);padding-top:10px}.summary-card{display:flex;align-items:center;gap:15px;padding:18px;background:#f8fafb;border:1px solid var(--line);border-radius:10px}.summary-card p,.summary-card h2{margin:0}.summary-card p{color:var(--muted);font-size:12px}.summary-card h2{font-size:17px}.summary-card>strong{margin-left:auto}.icon{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;font-weight:800}.success{background:#ddf5ea;color:#14825e}.invoice{background:var(--blue-soft);color:var(--blue)}.validation-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:24px 0}.validation-grid article{border:1px solid var(--line);border-radius:9px;padding:16px}.validation-grid span{display:block;color:var(--muted);font-size:11px;margin-bottom:5px}.callout{border-left:4px solid var(--blue);background:var(--blue-soft);padding:14px 16px}.callout p{margin:3px 0 0;color:var(--muted)}.callout.warning{border-color:#e39a27;background:#fff5df;margin-top:24px}.progress{display:flex;margin:25px 0}.progress span{flex:1;border-top:3px solid var(--line);padding-top:9px;color:var(--muted);font-size:12px}.progress .done,.progress .active{border-color:var(--blue);color:var(--blue);font-weight:700}.pill{padding:5px 8px;border-radius:14px;font-size:11px}.waiting{background:#f0f2f4;color:#687383}.ok{background:#ddf5ea;color:#087658}.partial{background:#fff0cf;color:#94600b}.invoice-options{display:grid;gap:12px;margin:24px 0}.invoice-options label{display:grid;grid-template-columns:22px 1fr;padding:16px;border:1px solid var(--line);border-radius:9px;font-weight:700}.invoice-options input{grid-row:1/3}.invoice-options small{font-weight:400;color:var(--muted)}.model-preview{background:#182433;color:white;border-radius:10px;padding:18px}.model-preview .eyebrow{color:#9eacba}.model-preview div{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.12);padding:10px 0;font-family:ui-monospace,monospace;font-size:12px}.model-preview b{color:#8fdfc5}.event-log{margin-top:16px;display:grid;grid-template-columns:220px 1fr;gap:25px;padding:17px 20px;background:#17202a;color:white;border-radius:10px}.event-log p{margin:0;color:#b2bdc8}.event-log .eyebrow{color:#7f8d9a;margin-bottom:4px}.trace-intro{display:flex;justify-content:space-between;align-items:center;background:white;padding:18px 22px;border-radius:12px;margin-bottom:15px}.trace-intro p{margin:0}.trace-intro a{color:var(--blue);font-weight:700;text-decoration:none}.trace-grid{display:grid;gap:12px}.trace-row{display:grid;grid-template-columns:1fr 1fr 1fr;background:white;border:1px solid var(--line);border-radius:10px;overflow:hidden}.trace-cell{padding:18px;border-right:1px solid var(--line)}.trace-cell:last-child{border:0}.trace-cell span{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;margin-bottom:6px}.trace-cell.boundary-cell span{color:var(--blue)}.trace-cell.control-cell span{color:var(--amber)}.trace-cell.entity-cell span{color:var(--teal)}.trace-cell p{margin:0;color:var(--muted);font-size:13px}
.lab-links a{color:#aeb9c7;text-decoration:none;padding:8px 2px}.lab-links a.active{color:#fff;border-bottom:2px solid #f1b740}
@media(max-width:850px){.workspace{grid-template-columns:1fr}.sidebar{border:0;border-bottom:1px solid var(--line);padding:16px}.sidebar nav{display:flex;overflow:auto;gap:6px}.nav-item{min-width:150px}.legend{display:none}.stage{padding:24px 14px}.form-grid,.validation-grid{grid-template-columns:1fr}.trace-row{grid-template-columns:1fr}.trace-cell{border-right:0;border-bottom:1px solid var(--line)}.event-log{grid-template-columns:1fr;gap:6px}.course{display:none}}