body{background:#f4f6f8}.sidebar{min-height:calc(100vh - 56px);background:#121820}.sidebar a{display:block;color:#dce5ee;text-decoration:none;padding:12px 14px;border-radius:10px;margin-bottom:6px}.sidebar a:hover{background:#1f7a4d;color:#fff}.stat-card{background:#fff;border-radius:18px;padding:22px;box-shadow:0 4px 20px rgba(0,0,0,.06)}.stat-card .label{color:#6c757d}.stat-card .value{font-size:28px;font-weight:800}.login-bg{background:linear-gradient(135deg,#0f1720,#123d2a)}.card{border-radius:16px}