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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.card {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 4px 24px rgba(0,0,0,.1);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 1.75rem;
  text-decoration: none;
}

.btn-google {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  width: 100%;
  padding: .75rem 1.25rem;
  border: 1.5px solid #e2e8f0;
  border-radius: 8px;
  background: #fff;
  font-size: .95rem;
  font-weight: 500;
  color: #1e293b;
  text-decoration: none;
  cursor: pointer;
  transition: background .15s, border-color .15s, box-shadow .15s;
}

.btn-google:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  box-shadow: 0 2px 8px rgba(0,0,0,.07);
}

.btn-google svg { flex-shrink: 0; }

.error {
  margin-top: 1rem;
  padding: .65rem .9rem;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 7px;
  color: #b91c1c;
  font-size: .84rem;
}