:root{--bg:#f6f7fb;--card:#fff;--text:#18202a;--muted:#687385;--line:#dfe4ea;--brand:#18202a;--warn:#fff1d6;--danger:#ffe5e5}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}.topbar{height:58px;background:var(--brand);color:white;display:flex;align-items:center;justify-content:space-between;padding:0 22px;position:fixed;left:0;right:0;top:0;z-index:2}.topbar span{margin-left:12px;color:#cbd3dd;font-size:13px}.topbar form{display:flex;gap:12px;align-items:center}.topbar button,button{background:#1f6feb;color:white;border:0;border-radius:6px;padding:9px 14px;cursor:pointer}.sidebar{position:fixed;top:58px;bottom:0;left:0;width:210px;background:#ffffff;border-right:1px solid var(--line);padding:18px}.sidebar a{display:block;color:var(--text);text-decoration:none;padding:11px;border-radius:8px;margin-bottom:5px}.sidebar a:hover{background:#eef2f7}.content{margin-left:230px;padding:84px 24px 40px}.login-content{padding:90px 24px}.login-card{max-width:400px;margin:40px auto;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:0 8px 30px rgba(0,0,0,.06)}label{display:block;font-weight:600;margin:10px 0 6px}input,select,textarea{width:100%;padding:10px;border:1px solid var(--line);border-radius:7px;background:#fff}textarea{min-height:70px}.hint,.muted{color:var(--muted);font-size:13px}.error{background:var(--danger);padding:10px;border-radius:8px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin:18px 0 26px}.card,.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:0 5px 18px rgba(0,0,0,.04)}.card b{font-size:28px;display:block}.card span{color:var(--muted)}.warn{background:var(--warn)}.grid-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;align-items:end}.stack-form{display:grid;gap:10px}.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:12px 0 28px}th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left;font-size:14px}th{background:#eef2f7}.low{background:#fff7e8}h1{margin-top:0}h2{margin-top:26px}