:root {
  font-family: Arial, Helvetica, sans-serif;
  color: #182033;
  background: #f4f7fb;
}

* { box-sizing: border-box; }

body { margin: 0; min-width: 320px; min-height: 100vh; }

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 15% 10%, rgba(48, 99, 241, 0.14), transparent 34%),
    radial-gradient(circle at 90% 90%, rgba(27, 185, 149, 0.12), transparent 32%),
    #f4f7fb;
}

.card {
  width: min(100%, 430px);
  padding: 44px 40px 36px;
  text-align: center;
  background: #fff;
  border: 1px solid #e2e7f0;
  border-radius: 20px;
  box-shadow: 0 22px 65px rgba(34, 51, 84, 0.13);
}

.brand {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(145deg, #3466f6, #6846d8);
  border-radius: 14px;
}

.eyebrow {
  margin: 0 0 10px;
  color: #68738a;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
}

h1 { margin: 0; font-size: 34px; line-height: 1.15; }

.description {
  margin: 16px auto 28px;
  color: #657087;
  font-size: 15px;
  line-height: 1.6;
}

.microsoft-button {
  width: 100%;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 13px;
  color: #182033;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  background: #fff;
  border: 1px solid #b8c0ce;
  border-radius: 9px;
  cursor: pointer;
}

.microsoft-button:hover { border-color: #3466f6; box-shadow: 0 7px 18px rgba(52, 102, 246, 0.14); }
.microsoft-button:focus-visible { outline: 3px solid rgba(52, 102, 246, 0.3); outline-offset: 3px; }

.microsoft-logo { width: 20px; height: 20px; display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.microsoft-logo span:nth-child(1) { background: #f25022; }
.microsoft-logo span:nth-child(2) { background: #7fba00; }
.microsoft-logo span:nth-child(3) { background: #00a4ef; }
.microsoft-logo span:nth-child(4) { background: #ffb900; }

.message { margin: 0 0 20px; padding: 12px; border-radius: 8px; font-size: 14px; }
.message.success { color: #14633e; background: #eaf8f1; border: 1px solid #bde7d1; }
.message.error { color: #8b2d2d; background: #fff0f0; border: 1px solid #f1c4c4; }
.privacy { margin: 20px 0 0; color: #8a93a5; font-size: 12px; }

@media (max-width: 500px) {
  .card { padding: 34px 24px 28px; }
  h1 { font-size: 29px; }
}