:root {
  --auth-navy: #13253d;
  --auth-blue: #317fe1;
  --auth-muted: #62748a;
  --auth-border: #d8e1ec;
  --auth-page: #f4f7fb;
}

.auth-page {
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, #ffffff 0, var(--auth-page) 46rem);
  color: var(--auth-navy);
  font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.auth-header {
  height: 4.5rem;
  display: flex;
  align-items: center;
  padding: 0 3rem;
  background: #ffffff;
  border-bottom: 1px solid var(--auth-border);
  box-shadow: 0 2px 10px rgba(19, 37, 61, 0.04);
}

.auth-header img {
  display: block;
  width: 7.1rem;
  height: auto;
}

.auth-main {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 4rem 1.5rem;
}

.auth-card {
  width: min(100%, 29rem);
  padding: 2.75rem 3rem 2.5rem;
  background: #ffffff;
  border: 1px solid var(--auth-border);
  border-radius: 1rem;
  box-shadow: 0 18px 45px rgba(19, 37, 61, 0.1);
  text-align: center;
}

.auth-logo {
  display: block;
  width: 8rem;
  height: auto;
  margin: 0 auto 1.5rem;
}

.auth-eyebrow {
  margin: 0 0 0.55rem;
  color: var(--auth-blue);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.auth-card h1 {
  margin: 0;
  color: var(--auth-navy);
  font-size: 1.8rem;
  letter-spacing: -0.025em;
}

.auth-error {
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid #f1c2c2;
  border-radius: 0.5rem;
  background: #fff5f5;
  color: #9f2525;
  font-size: 0.86rem;
  text-align: left;
}

.auth-actions {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

.auth-primary,
.auth-help {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.auth-primary {
  background: var(--auth-blue);
  color: #ffffff;
  box-shadow: 0 5px 12px rgba(49, 127, 225, 0.2);
}

.auth-primary:hover,
.auth-primary:focus-visible {
  background: #1d64b9;
  color: #ffffff;
  transform: translateY(-1px);
}

.auth-help {
  border: 1px solid #b9c6d6;
  color: #1d64b9;
  font-size: 0.9rem;
}

.auth-help:hover,
.auth-help:focus-visible {
  border-color: var(--auth-blue);
  background: #eaf3ff;
  color: #1d64b9;
}

.microsoft-mark {
  display: grid;
  grid-template-columns: repeat(2, 0.55rem);
  grid-template-rows: repeat(2, 0.55rem);
  gap: 0.12rem;
}

.microsoft-mark i:nth-child(1) { background: #f25022; }
.microsoft-mark i:nth-child(2) { background: #7fba00; }
.microsoft-mark i:nth-child(3) { background: #00a4ef; }
.microsoft-mark i:nth-child(4) { background: #ffb900; }

.auth-note {
  margin: 1.7rem 0 0;
  color: var(--auth-muted);
  font-size: 0.78rem;
}

.auth-footer {
  padding: 1.25rem 1.5rem 1.75rem;
  color: var(--auth-muted);
  font-size: 0.78rem;
  text-align: center;
}

@media (max-width: 600px) {
  .auth-header { padding: 0 1.25rem; }
  .auth-main { padding: 2.5rem 1rem; }
  .auth-card { padding: 2.25rem 1.5rem 2rem; }
}