:root {
  color-scheme: dark;
  --bg: #08090a;
  --surface: #121517;
  --heading: #fff;
  --muted: #849096;
  --faint: #4e595e;
  --cyan: #00d2c8;
  --green: #47d7a1;
  --border: rgb(255 255 255 / 15%);
  --grid: rgb(255 255 255 / 2.8%);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    var(--bg);
  background-size: 72px 72px;
  color: var(--heading);
}

.unified-login {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(100%, 440px);
  padding: 38px;
  border: 1px solid var(--border);
  background: rgb(18 21 23 / 94%);
  box-shadow: 0 24px 70px rgb(0 0 0 / 32%);
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 28px;
  place-items: center;
  border: 1px solid rgb(0 210 200 / 55%);
  background: rgb(0 210 200 / 9%);
  color: var(--cyan);
  font-family: Consolas, monospace;
  font-size: 13px;
}

.brand-mark-logo {
  border: 0;
  background: transparent;
}

.brand-mark-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font-family: Consolas, monospace;
  font-size: 11px;
}

h1 { margin: 0; font-size: 24px; line-height: 1.35; }
.copy { margin: 16px 0 28px; color: var(--muted); font-size: 14px; line-height: 1.8; }

.login-button {
  display: grid;
  min-height: 48px;
  grid-template-columns: 20px 1fr 20px;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  background: var(--cyan);
  color: #041817;
  font-size: 14px;
  text-decoration: none;
}

.login-button[aria-disabled="true"] { pointer-events: none; opacity: .65; }
.access-link { display: flex; justify-content: center; }
.lock { width: 13px; height: 11px; border: 2px solid currentColor; }
.status { display: flex; align-items: center; gap: 8px; margin-top: 20px; color: var(--faint); font: 11px Consolas, monospace; }
.status i { width: 6px; height: 6px; background: var(--green); }

@media (prefers-color-scheme: light) {
  :root { color-scheme: light; --bg: #dfe3e5; --surface: #f5f7f7; --heading: #0c1418; --muted: #4d5e65; --faint: #748187; --cyan: #007f79; --border: rgb(20 31 36 / 22%); --grid: rgb(20 31 36 / 5.5%); }
  .login-panel { background: rgb(245 247 247 / 94%); box-shadow: 0 24px 70px rgb(37 52 59 / 14%); }
  .brand-mark { background: rgb(0 127 121 / 9%); border-color: rgb(0 127 121 / 55%); }
  .login-button { color: #f0fffe; }
}

@media (max-width: 520px) { .login-panel { padding: 28px 22px; } }