*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f4f6f8;color:#18212b}.app-shell{display:flex;min-height:100vh}.sidebar{width:250px;background:#14202b;color:#fff;padding:22px 16px;position:fixed;inset:0 auto 0 0}.brand{font-size:22px;font-weight:800;line-height:1.1;margin-bottom:24px}.brand small{font-size:10px;letter-spacing:1.5px;color:#b9c6d1}.user-box{background:#1d2d3a;border-radius:10px;padding:12px;margin-bottom:18px}.user-box strong,.user-box span{display:block}.user-box span{font-size:12px;color:#b9c6d1;margin-top:4px}nav a,.logout{display:block;color:#eaf0f4;text-decoration:none;padding:11px 12px;border-radius:8px;margin:3px 0}nav a:hover,.logout:hover{background:#263a49}.logout{position:absolute;bottom:20px;left:16px;right:16px;background:#26313b}.content{margin-left:250px;width:calc(100% - 250px);padding:28px}.topbar{display:flex;justify-content:space-between;margin-bottom:24px}.topbar h1{margin:0;font-size:26px}.topbar p{margin:5px 0;color:#6b7782}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 10px #0000000d}.card .label{font-size:13px;color:#697783}.card .value{font-size:25px;font-weight:700;margin-top:8px}.panel{background:#fff;border-radius:12px;padding:20px;margin-top:20px}.muted{color:#6b7782}.btn{display:inline-block;padding:10px 14px;background:#14202b;color:#fff;text-decoration:none;border:0;border-radius:8px;cursor:pointer}.btn-secondary{background:#e9eef2;color:#18212b}.form-group{margin-bottom:15px}.form-group label{display:block;font-weight:600;margin-bottom:6px}.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px;border:1px solid #ccd5dc;border-radius:7px}.login-page{min-height:100vh;display:grid;place-items:center;background:#f4f6f8}.login-box{width:min(420px,92vw);background:#fff;padding:32px;border-radius:14px;box-shadow:0 8px 35px #00000012}.login-box h1{margin-top:0}.error{background:#fdecec;color:#a51d1d;padding:10px;border-radius:7px;margin-bottom:14px}@media(max-width:900px){.sidebar{width:210px}.content{margin-left:210px;width:calc(100% - 210px)}.cards{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.sidebar{position:static;width:100%;min-height:auto}.app-shell{display:block}.content{margin:0;width:100%;padding:18px}.logout{position:static;margin-top:15px}.cards{grid-template-columns:1fr}}