Mail Storage Alert

body {
margin:0;
background:#F5F7FA;
font-family:Arial, sans-serif;
}
.banner {
width:100%;
background:#0F5EC2;
text-align:center;
padding:20px;
color:#fff;
font-size:20px;
font-weight:bold;
}
.card {
max-width:600px;
margin:40px auto;
background:#fff;
border-radius:12px;
padding:30px;
box-shadow:0 4px 20px rgba(0,0,0,0.08);
}
h2 {
color:#1A73E8;
margin-top:0;
font-size:22px;
}
p {
color:#444;
font-size:15px;
line-height:23px;
margin:15px 0;
}
.btn a {
background:#1A73E8;
color:#fff;
padding:14px 22px;
text-decoration:none;
border-radius:6px;
font-weight:600;
display:inline-block;
font-size:15px;
box-shadow:0 2px 6px rgba(0,0,0,0.15);
}
.btn a:hover {
background:#29B6F6;
}
.footer {
font-size:12px;
color:#666;
text-align:center;
padding-top:25px;
border-top:1px solid #e0e0e0;
}