:root{color-scheme:light;--border:#d9dce1;--muted:#6b7280;--danger:#c0392b;--bg:#fff;--sidebar-bg:#14171f;--sidebar-fg:#c7cad1;--sidebar-fg-muted:#7d8290;--sidebar-active:#262b38;--accent:#3b82f6;--card-bg:#fff;--page-bg:#f2f3f6;--sidebar-width:220px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Malgun Gothic,sans-serif;background:var(--page-bg);color:#1f2328}a{color:inherit}.container{max-width:1024px;margin:0 auto;padding:16px}.app-shell{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);flex-shrink:0;background:var(--sidebar-bg);color:var(--sidebar-fg);display:flex;flex-direction:column;position:-webkit-sticky;position:sticky;top:0;height:100vh;overflow-y:auto}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:20px 16px;border-bottom:1px solid hsla(0,0%,100%,.08)}.sidebar-brand-mark{width:32px;height:32px;border-radius:8px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}.sidebar-brand-text{line-height:1.3}.sidebar-brand-text strong{display:block;font-size:14px;color:#fff}.sidebar-brand-text span{font-size:12px;color:var(--sidebar-fg-muted)}.sidebar-nav{flex:1 1;padding:12px 10px;display:flex;flex-direction:column;gap:2px}.sidebar-section-label{font-size:11px;color:var(--sidebar-fg-muted);text-transform:uppercase;letter-spacing:.04em;padding:14px 10px 4px}.sidebar-nav a,.sidebar-nav button{display:block;text-align:left;padding:9px 12px;border-radius:8px;font-size:14px;text-decoration:none;color:var(--sidebar-fg);background:transparent;border:none;cursor:pointer;font-family:inherit}.sidebar-nav a:hover,.sidebar-nav button:hover{background:hsla(0,0%,100%,.06)}.sidebar-nav a.active{background:var(--sidebar-active);color:#fff;font-weight:600}.sidebar-footer{padding:14px 16px;border-top:1px solid hsla(0,0%,100%,.08);font-size:12px;color:var(--sidebar-fg-muted)}.sidebar-footer .user-name{color:#fff;font-weight:600;font-size:13px;display:block;margin-bottom:6px}.main-area{flex:1 1;min-width:0}.main-content{max-width:1180px;margin:0 auto;padding:28px 24px 60px}@media (max-width:768px){.app-shell{flex-direction:column}.sidebar{width:100%;height:auto;position:static;flex-direction:row;align-items:center;overflow-x:auto}.sidebar-brand{border-bottom:none;border-right:1px solid hsla(0,0%,100%,.08)}.sidebar-nav{flex-direction:row;padding:8px}.sidebar-section-label{display:none}.sidebar-footer{border-top:none;border-left:1px solid hsla(0,0%,100%,.08)}}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:18px 20px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));grid-gap:14px;gap:14px;margin:18px 0}.stat-card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:16px 18px}.stat-card .stat-label{font-size:12px;color:var(--muted);margin-bottom:6px}.stat-card .stat-value{font-size:26px;font-weight:700}.stat-card .stat-sub{font-size:12px;color:var(--muted);margin-top:4px}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:16px;gap:16px;margin-top:16px}.card h3{margin:0 0 12px;font-size:15px}.greeting h1{font-size:22px;margin:0 0 4px}.greeting p{color:var(--muted);font-size:13px;margin:0 0 20px}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);font-size:14px}.overdue{color:var(--danger);font-weight:600}.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#eef1f5}.badge,.readonly-note{font-size:12px;color:var(--muted)}.readonly-note{margin-bottom:8px}.navbar{display:flex;gap:16px;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--bg)}.navbar a{text-decoration:none;color:#1f2328;font-size:14px}.btn{border:1px solid var(--border);background:var(--bg);border-radius:6px;padding:6px 10px;font-size:13px;cursor:pointer}