html, body {
  margin: 0;
  padding: 0;
  background: #fff;
  color: #000;
  font-family: Arial, SimSun, "宋体", sans-serif;
  font-size: 12px;
}

a { color: #0000ee; text-decoration: none; }
a:hover { text-decoration: underline; }

.webmail {
  width: 780px;
  max-width: calc(100% - 18px);
  margin: 8px;
  border: 1px solid #999;
  background: #fff;
}

.topbar {
  height: 25px;
  line-height: 25px;
  padding: 0 7px;
  background: #ddd;
  border-bottom: 1px solid #999;
}

.brand { font-size: 13px; font-weight: bold; }
.account { float: right; font-size: 12px; }

.toolbar {
  padding: 4px 7px;
  background: #f4f4f4;
  border-bottom: 1px solid #bbb;
}

.toolbar a { display: inline-block; margin-right: 18px; }

.layout {
  display: grid;
  grid-template-columns: 125px minmax(0, 1fr);
  min-height: 510px;
}

aside {
  background: #eee;
  border-right: 1px solid #aaa;
  padding: 6px 0;
}

.folder-title { padding: 5px 12px; color: #666; font-size: 12px; }
aside a { display: block; padding: 6px 12px 6px 22px; }
aside a.active {
  color: #111;
  font-weight: bold;
  background: #ccc;
  border-top: 1px solid #aaa;
  border-bottom: 1px solid #aaa;
}

main { padding: 10px 12px 24px; }
h1 { margin: 0 0 8px; font-size: 15px; font-weight: bold; }

.headers {
  width: 100%;
  border-collapse: collapse;
  background: #f8f8f8;
  border-top: 1px solid #d0d0d0;
  border-bottom: 1px solid #d0d0d0;
}

.headers th, .headers td { padding: 4px 6px; text-align: left; vertical-align: top; }
.headers th { width: 66px; color: #666; font-weight: normal; }

article {
  width: 590px;
  max-width: 100%;
  padding: 12px 5px;
  line-height: 1.65;
}

.credentials {
  margin: 14px 0;
  border-collapse: collapse;
  font-family: "Courier New", monospace;
}

.credentials th, .credentials td {
  padding: 5px 12px;
  border: 1px solid #aaa;
  text-align: left;
}

.credentials th {
  background: #eee;
  font-family: Arial, SimSun, "宋体", sans-serif;
  font-weight: normal;
}

.entry { color: #0000ee; text-decoration: underline; }
.plain-link, .mail-footer { color: #666; font-size: 12px; }
.mail-footer { margin-top: 24px; padding-top: 8px; border-top: 1px solid #ddd; }

.access-body { background: #fff; }
.access-panel {
  width: 520px;
  max-width: calc(100% - 24px);
  margin: 14px 12px;
  background: #fff;
}

.access-head { font-size: 16px; font-weight: bold; }
.access-note { padding: 4px 0 7px; color: #444; }
.access-panel form { padding: 0; }
.access-panel table { border-collapse: collapse; margin: 3px 0 12px; }
.access-panel td { padding: 3px 5px 3px 0; vertical-align: middle; }
.access-panel input {
  width: 190px;
  height: 20px;
  padding: 1px 3px;
  border: 1px solid #888;
  background: #fff;
  font-family: "Courier New", monospace;
  font-size: 12px;
}

.access-panel button { margin-top: 2px; padding: 2px 12px; color: #111; cursor: pointer; }
.access-small {
  width: 430px;
  max-width: 100%;
  padding: 6px 0;
  color: #666;
  border-top: 1px solid #ddd;
  font-size: 11px;
  line-height: 1.6;
}

@media (max-width: 650px) {
  .webmail { max-width: none; width: 100%; margin: 0; border-left: 0; border-right: 0; }
  .account { display: none; }
  .layout { grid-template-columns: 1fr; }
  aside { display: none; }
  main { padding: 14px 12px 24px; }
  .access-panel { margin: 10px 8px; }
}