:root{--bg:#f6f7f9;--panel:#fff;--panel-soft:#f0f4f7;--text:#1d252d;--muted:#61707f;--line:#d8e0e7;--blue:#1463b8;--blue-dark:#0b4d91;--green:#157347;--amber:#925f00;--red:#b42318;--focus:#111827}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif;letter-spacing:0}button,input,select{font:inherit}button:disabled{cursor:not-allowed;opacity:.55}button,input,select{border-radius:6px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.app-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100vh}.sidebar{background:#fff;border-right:1px solid var(--line);padding:20px 16px}.brand{display:flex;gap:12px;align-items:center;padding:8px 8px 22px}.brand-mark{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:8px;background:var(--blue);color:#fff;font-weight:700}.brand span,.brand strong{display:block}.brand 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var(--line)}.nav-list{grid-template-columns:repeat(4,minmax(0,1fr))}.nav-item{justify-content:center}.nav-item span{display:none}.main-content{padding:18px}.form-grid{grid-template-columns:1fr}.span-2{grid-column:span 1}.line-grid{grid-template-columns:1fr}}