:root {
  color-scheme: light;
  font-family: "Microsoft YaHei UI", "Segoe UI", sans-serif;
  color: #20242a;
  background: #f4f6f8;
}

* { box-sizing: border-box; }
body { margin: 0; background: #f4f6f8; }
main { width: min(1180px, calc(100% - 32px)); margin: 28px auto 56px; }
h1 { font-size: 24px; margin: 0 0 20px; }
h2 { font-size: 18px; margin: 0 0 16px; }
section { margin: 0 0 28px; }

.topbar {
  min-height: 56px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  color: #fff;
  background: #20242a;
}
.topbar nav { display: flex; gap: 18px; flex: 1; }
.topbar a { color: #fff; text-decoration: none; }

input, button {
  min-height: 36px;
  border: 1px solid #b9c0c8;
  border-radius: 4px;
  padding: 7px 10px;
  font: inherit;
}
button {
  border-color: #176b54;
  color: #fff;
  background: #176b54;
  cursor: pointer;
}
button.secondary { border-color: #7b848d; color: #30363d; background: #fff; }

.inline-form, .actions, .topbar form { display: flex; gap: 8px; align-items: center; }
.actions { flex-wrap: wrap; min-width: 460px; }
.actions form { display: flex; gap: 6px; }
.actions input { width: 138px; }

.table-wrap { overflow-x: auto; background: #fff; border: 1px solid #d8dde3; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 11px 12px; border-bottom: 1px solid #e2e6ea; text-align: left; vertical-align: top; }
th { font-size: 13px; color: #525b65; background: #f7f8fa; }

.version-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 12px 16px;
}
.version-form label, .login-form label { display: grid; gap: 6px; }
.version-form .check { display: flex; align-items: center; }

.login-page { min-height: 100vh; display: grid; place-items: center; }
.login-shell { width: min(380px, calc(100% - 32px)); margin: 0; }
.login-form { display: grid; gap: 14px; }
.error { color: #b42318; margin: 0; }

@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; padding: 12px 16px; }
  .version-form { grid-template-columns: 1fr; }
  .inline-form { align-items: stretch; flex-direction: column; }
}