* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
}
body {
  background: linear-gradient(135deg, #e6f7f9 0%, #c1e5ea 50%, #a8d5db 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: #102a43;
}
.container {
  background: #ffffff;
  padding: 48px 36px 40px;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(16, 42, 67, 0.12);
  max-width: 380px;
  width: 100%;
  animation: fadeUp 0.5s ease-out;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.logo {
  display: block;
  width: 88px;
  height: 88px;
  margin: 0 auto 20px;
  border-radius: 20px;
  box-shadow: 0 6px 20px rgba(16, 42, 67, 0.18);
}
h1 {
  text-align: center;
  font-size: 22px;
  font-weight: 600;
  color: #102a43;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}
.subtitle {
  text-align: center;
  color: #627d98;
  font-size: 13px;
  margin-bottom: 32px;
  font-weight: 400;
}
.message {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  text-align: center;
  animation: fadeIn 0.3s ease-out;
}
.message.error {
  background: #fff5f5;
  color: #c53030;
  border: 1px solid #fed7d7;
}
.message.info {
  background: #f0fff4;
  color: #22543d;
  border: 1px solid #c6f6d5;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.gsi-button {
  user-select: none;
  -webkit-user-select: none;
  -webkit-appearance: none;
  background-color: #FFFFFF;
  background-image: none;
  border: 1px solid #747775;
  border-radius: 4px;
  box-sizing: border-box;
  color: #1f1f1f;
  cursor: pointer;
  font-family: 'Roboto', arial, sans-serif;
  font-size: 14px;
  font-weight: 500;
  height: 44px;
  letter-spacing: 0.25px;
  outline: none;
  overflow: hidden;
  padding: 0 12px;
  position: relative;
  text-align: center;
  transition: background-color .218s, border-color .218s, box-shadow .218s;
  vertical-align: middle;
  white-space: nowrap;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  gap: 12px;
}
.gsi-button:hover {
  box-shadow: 0 1px 2px 0 rgba(60, 64, 67, .30), 0 1px 3px 1px rgba(60, 64, 67, .15);
  background-color: #f8f9fa;
}
.gsi-button:active {
  background-color: #f1f3f4;
}
.gsi-button-icon {
  height: 20px;
  width: 20px;
  flex-shrink: 0;
}
.footer {
  text-align: center;
  margin-top: 28px;
  font-size: 11px;
  color: #829ab1;
  letter-spacing: 0.3px;
}
.footer span {
  color: #486581;
}