*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 16px;
}

.card {
  background: #fff;
  border-radius: 10px;
  padding: 40px 60px;
  max-width: 460px;
  width: 100%;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0, 0, 0, .1);
}

.logo-img {
  max-width: 180px;
  height: auto;
  margin-bottom: 20px;
}

h1 {
  margin-top: 0;
  font-size: 24px;
  color: #333;
  margin-bottom: 10px;
}

p {
  font-size: 16px;
  color: #666;
  line-height: 1.6;
  margin-bottom: 28px;
}

.btn {
  display: block;
  width: 100%;
  padding: 12px 20px;
  font-size: 17px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 6px;
  margin-bottom: 12px;
  cursor: pointer;
  border: none;
  transition: opacity .15s;
}

.btn:active { opacity: .8; }
.btn-primary { background-color: teal; color: #fff; }
.btn-secondary { background-color: #f0fafa; color: teal; border: 2px solid teal; }
.btn-tertiary { background: transparent; color: #999; font-size: 14px; padding: 8px; margin-bottom: 0; }
.divider { font-size: 13px; color: #bbb; margin: 2px 0 14px; }
.error { color: #c0392b; font-size: 15px; margin-top: 8px; }