:root {
  --slate-50: #f8fafc;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-900: #0f172a;
  --emerald-600: #059669;
  --emerald-700: #047857;
  --emerald-800: #065f46;
  --rose-50: #fff1f2;
  --rose-200: #fecdd3;
  --rose-700: #be123c;
  --amber-50: #fffbeb;
  --amber-200: #fde68a;
  --amber-800: #92400e;
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji',
    'Segoe UI Symbol', 'Noto Color Emoji';
  background: var(--slate-50);
  color: var(--slate-900);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.card {
  width: 100%;
  max-width: 28rem;
  background: #fff;
  border: 1px solid rgb(226 232 240 / 0.8);
  border-radius: 1.5rem;
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  padding: 1.5rem;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.brand {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--emerald-700);
  letter-spacing: 0.01em;
}
.lang { display: flex; gap: 0.25rem; margin: 0; padding: 0; list-style: none; }
.lang a {
  display: inline-block;
  min-height: 2.75rem;
  min-width: 2.75rem;
  padding: 0.625rem 0.5rem;
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  color: var(--slate-600);
  text-decoration: none;
}
.lang a:hover { color: var(--emerald-800); text-decoration: underline; }
.lang a[aria-current='true'] { color: var(--slate-900); background: var(--slate-50); }
.header { text-align: center; margin-bottom: 2rem; }
h1 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--slate-900);
}
.subtitle { margin: 0.25rem 0 0; font-size: 0.875rem; color: var(--slate-600); }
.hint { margin: 0.5rem 0 0; font-size: 0.75rem; color: var(--slate-500); }
.intro { margin: 0 0 1.25rem; font-size: 0.875rem; color: var(--slate-600); }
.intro p { margin: 0 0 0.5rem; }
.intro .muted { font-size: 0.75rem; color: var(--slate-500); }
.alert, .notice {
  margin: 0 0 1.25rem;
  padding: 0.875rem;
  border-radius: 0.75rem;
  border: 1px solid;
  font-size: 0.875rem;
  font-weight: 500;
}
.alert { background: var(--rose-50); border-color: var(--rose-200); color: var(--rose-700); }
.notice { background: var(--amber-50); border-color: var(--amber-200); color: var(--amber-800); }
form { margin: 0; }
.field { margin-bottom: 1rem; }
label {
  display: block;
  margin-bottom: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--slate-700);
}
input[type='email'], input[type='password'] {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.625rem 1rem;
  border: 1px solid var(--slate-300);
  border-radius: 0.75rem;
  background: #fff;
  color: var(--slate-900);
  font: inherit;
  font-size: 1rem;
  box-shadow: 0 1px rgb(0 0 0 / 0.05);
}
input[aria-invalid='true'] { border-color: var(--rose-700); }
input:focus { outline: none; border-color: var(--emerald-600); box-shadow: 0 0 0 3px rgb(5 150 105 / 0.35); }
button {
  width: 100%;
  min-height: 2.75rem;
  margin-top: 0.5rem;
  padding: 0.75rem 1rem;
  border: 0;
  border-radius: 0.75rem;
  background: var(--emerald-700);
  color: #fff;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 1px 2px rgb(0 0 0 / 0.05);
}
button:hover { background: var(--emerald-800); }
button:focus-visible, a:focus-visible {
  outline: 2px solid var(--emerald-800);
  outline-offset: 2px;
}
.footer-link { margin: 1.5rem 0 0; text-align: center; font-size: 0.875rem; }
a { color: var(--emerald-700); font-weight: 600; }
a:hover { color: var(--emerald-800); }
.apps { margin: 1.5rem 0 0; padding: 0; list-style: none; display: grid; gap: 0.5rem; }
.apps a {
  display: block;
  padding: 0.75rem 1rem;
  border: 1px solid var(--slate-200);
  border-radius: 0.75rem;
  text-decoration: none;
  color: var(--slate-900);
}
.apps a:hover { border-color: var(--emerald-600); color: var(--emerald-800); }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
@media (min-width: 640px) {
  .page { padding: 1.5rem; }
  .card { padding: 2.5rem; }
}