:root {
  color-scheme: light;
  --ink: #172b45;
  --muted: #526a84;
  --line: #dce7f2;
  --canvas: #f4f8fd;
  --surface: #ffffff;
  --primary: #165dff;
  --primary-hover: #0e4fd8;
  --accent: #165dff;
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--canvas); }
button, input { font: inherit; }
input:focus-visible { outline: none; }
button:focus-visible { outline: 3px solid rgba(22, 93, 255, 0.28); outline-offset: 3px; }
::selection { color: #fff; background: #286fca; }

.login-shell {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(420px, 1.22fr);
  min-height: 100vh;
}
.login-brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 64px clamp(36px, 6vw, 92px);
  border-right: 1px solid var(--line);
  color: var(--ink);
  background: #eef5ff;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--primary);
  border-radius: 8px;
  color: #ffffff;
  background: var(--primary);
  font-weight: 800;
  box-shadow: 0 8px 24px rgba(22, 93, 255, 0.2);
}
.login-brand p { margin: 28px 0 10px; color: var(--primary); font-size: 13px; font-weight: 800; }
.login-brand h1 { margin: 0; font-size: 38px; line-height: 1.2; letter-spacing: 0; }
.login-brand > span:last-child { margin-top: 18px; color: var(--muted); font-size: 13px; }
.login-panel { display: grid; place-items: center; padding: 40px; background: var(--canvas); }
.login-panel form, .bootstrap-state {
  width: min(420px, 100%);
  padding: 36px 38px 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 2px 5px rgba(25, 55, 91, 0.04), 0 18px 46px rgba(30, 73, 125, 0.08);
}
.login-panel header { margin-bottom: 30px; }
.login-panel header p, .bootstrap-state p {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
}
.login-panel h2 { margin: 0; color: var(--ink); font-size: 25px; letter-spacing: 0; }
.login-panel label { display: block; margin-top: 20px; }
.login-panel label span { display: block; margin-bottom: 8px; color: var(--muted); font-size: 12px; font-weight: 700; }
.login-panel input {
  width: 100%;
  height: 46px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface);
  outline: none;
}
.login-panel input:hover { border-color: #b9cbe0; }
.login-panel input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.14); }
.login-panel button {
  width: 100%;
  height: 46px;
  margin-top: 24px;
  border: 0;
  border-radius: 8px;
  color: white;
  background: var(--primary);
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 5px 13px rgba(22, 93, 255, 0.2);
  transition: background 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}
.login-panel button:hover { background: var(--primary-hover); box-shadow: 0 7px 18px rgba(22, 93, 255, 0.26); transform: translateY(-1px); }
.login-panel button:active { transform: translateY(0); }
.login-panel button:disabled { cursor: wait; opacity: 0.65; }
.login-error { margin: 14px 0 -8px; color: #a2342b; font-size: 12px; }
.bootstrap-state code {
  display: block;
  margin-top: 22px;
  padding: 14px;
  overflow-wrap: anywhere;
  border-left: 3px solid var(--primary);
  color: #30445d;
  background: #eef5ff;
  font-size: 12px;
  line-height: 1.7;
}

@media (max-width: 760px) {
  .login-shell { grid-template-columns: 1fr; grid-template-rows: auto 1fr; min-height: 100dvh; }
  .login-brand { min-height: 196px; padding: 28px 24px; }
  .brand-mark { width: 40px; height: 40px; }
  .login-brand p { margin-top: 20px; }
  .login-brand h1 { font-size: 28px; }
  .login-brand > span:last-child { margin-top: 12px; }
  .login-panel { align-items: start; padding: 26px 18px 40px; }
  .login-panel form, .bootstrap-state { padding: 28px 24px 30px; }
}