:root {
  --c-brand: #1D4ED8;
  --c-brand-dark: #1E3A8A;
  --c-text: #0F172A;
  --c-text-soft: #64748B;
  --c-text-mute: #94A3B8;
  --c-bg: #F8FAFC;
  --c-surface: #FFFFFF;
  --c-line: #E2E8F0;
  --c-green: #16A34A;
  --c-red: #EF4444;
  --c-amber: #F59E0B;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  -webkit-font-smoothing: antialiased;
}
.login-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}
.login-card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 14px;
  padding: 36px 32px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
}
.login-logo {
  display: block;
  height: 44px;
  width: auto;
  margin-bottom: 18px;
}
.login-card h1 {
  margin: 0 0 4px;
  font-size: 19px;
  letter-spacing: -0.015em;
  color: var(--c-brand-dark);
}
.login-sub {
  margin: 0 0 28px;
  font-size: 13px;
  color: var(--c-text-soft);
}
label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-soft);
  margin-bottom: 6px;
}
input[type=email] {
  width: 100%;
  font: 14px 'Inter', sans-serif;
  background: #F1F5F9;
  border: 1px solid var(--c-line);
  border-radius: 8px;
  padding: 11px 13px;
  outline: none;
  transition: border-color 0.12s, background 0.12s;
}
input[type=email]:focus {
  border-color: var(--c-brand);
  background: #fff;
}
button {
  margin-top: 16px;
  width: 100%;
  background: var(--c-brand);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  font: 600 14px 'Inter', sans-serif;
  cursor: pointer;
  transition: background 0.12s;
}
button:hover:not(:disabled) { background: #2563EB; }
button:disabled { opacity: 0.6; cursor: not-allowed; }
.login-status {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.5;
}
.login-status.ok { background: rgba(22, 163, 74, 0.1); color: #166534; border: 1px solid rgba(22, 163, 74, 0.25); }
.login-status.warn { background: rgba(245, 158, 11, 0.1); color: #92400E; border: 1px solid rgba(245, 158, 11, 0.25); }
.login-status.error { background: rgba(239, 68, 68, 0.1); color: #991B1B; border: 1px solid rgba(239, 68, 68, 0.25); }
.login-foot {
  margin: 24px 0 0;
  font-size: 12px;
  color: var(--c-text-mute);
  line-height: 1.6;
}
.login-version {
  margin-top: 18px;
  font-size: 11px;
  color: var(--c-text-mute);
}