:root{--bg:#f4f6f9;--surface:#fff;--surface2:#f8fafc;--text:#172033;--muted:#7b8498;--line:#e6eaf0;--accent:#3157d5;--accent2:#eaf0ff;--danger:#c44545;--success:#16805b;--shadow:0 10px 30px rgba(24,33,53,.07);--radius:18px}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.app-shell{min-height:100vh;display:grid;grid-template-columns:230px 1fr}.sidebar{background:#111827;color:#dbe2ef;padding:28px 18px 20px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:12px;padding:0 8px 26px}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:#fff;color:#111827;font-weight:800}.brand strong{display:block;font-size:16px}.brand small{color:#8f9bb1}.sidebar nav{display:flex;flex-direction:column;gap:6px}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 13px;border-radius:12px;color:#aeb8ca;font-size:14px}.nav-item.active{background:#24304a;color:#fff}.nav-item em{font-size:10px;margin-left:auto;color:#69758a;font-style:normal}.sidebar-foot{margin-top:auto;color:#68758c;font-size:11px;padding:10px}.content{padding:32px;min-width:0}.topbar{display:flex;align-items:end;justify-content:space-between;margin-bottom:24px}.eyebrow{margin:0 0 5px;font-size:11px;letter-spacing:.13em;color:#8a94a8;font-weight:800}.topbar h1,.detail-head h2{margin:0;font-size:30px;letter-spacing:-.035em}.workspace{display:grid;grid-template-columns:minmax(290px,360px) minmax(0,1fr);gap:22px;align-items:start}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.list-panel{position:sticky;top:24px;overflow:hidden}.search{margin:14px;display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--surface2);border-radius:12px;padding:0 12px}.search input{border:0;background:transparent;outline:0;padding:12px 0;width:100%;font-size:14px}.search a{font-size:20px;color:#9aa3b4}.list-meta{padding:0 18px 12px;color:var(--muted);font-size:12px}.customer-list{max-height:calc(100vh - 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