body {
  font-family: 'Roboto', 'Segoe UI', 'Arial', sans-serif;
  background: linear-gradient(135deg, #fcfcfc 0%, #f9f9f9 100%);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  color: #222;
}
.container {
  max-width: 420px;
  margin: 60px auto 0 auto;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 8px 36px #e3e3e3;
  padding: 2.5em 2em 2em 2em;
  text-align: center;
  position: relative;
}
.logo-img {
  width: 90px;
  height: 90px;
  margin-bottom: 0.7em;
  border-radius: 16px;
  object-fit: contain;
  background: #fff;
  display: inline-block;
  box-shadow: 0 2px 8px #f9c0c0;
  border: 3px solid #c62828;
}
h1 {
  color: #c62828;
  font-size: 2.1em;
  margin-bottom: 0.3em;
  letter-spacing: 1px;
  font-weight: 800;
  font-family: 'Roboto', 'Segoe UI', 'Arial', sans-serif;
}
.tagline {
  color: #1976d2;
  font-size: 1.15em;
  margin-bottom: 1.3em;
  font-weight: 500;
  font-family: 'Roboto', 'Segoe UI', 'Arial', sans-serif;
}
.how-it-works {
  background: #f7fbff;
  border-radius: 8px;
  padding: 0.8em 1em;
  font-size: 0.98em;
  color: #c62828;
  margin-bottom: 2em;
  box-shadow: 0 1px 4px #e0e6f5;
}
.result, .error {
  margin-top: 1em;
  padding: 1em;
  border-radius: 6px;
  width: 90%;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.07em;
}
.result {
  background: #e3f2fd;
  color: #1976d2;
  border: 1px solid #bbdefb;
}
.error {
  background: #ffebee;
  color: #c62828;
  border: 1px solid #f8bbbd;
}
.input-group {
  text-align: left;
  margin: 1.2em 0 0.6em 0;
}
.input-label {
  font-weight: 500;
  color: #1976d2;
  display: block;
  margin-bottom: 0.3em;
  font-size: 1em;
}
input[type="email"], button {
  margin: 0.3em 0;
  padding: 0.85em;
  width: 100%;
  font-size: 1em;
  border-radius: 5px;
  border: 1px solid #bbb;
  outline: none;
  box-sizing: border-box;
  font-family: inherit;
}
input[type="email"]:focus {
  border-color: #1976d2;
  background: #f3f7ff;
}
button {
  background: #c62828;
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.2s;
}
button:disabled {
  background: #eee;
  color: #aaa;
  cursor: not-allowed;
}
button:hover:not(:disabled) {
  background: #b71c1c;
}
.drive-link-btn {
  display: inline-block;
  margin-top: 1em;
  padding: 0.7em 1.5em;
  background: linear-gradient(90deg,#1976d2 70%, #c62828 100%);
  color: #fff;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.2s;
  box-shadow: 0 2px 8px #e0e6f5;
}
.drive-link-btn:hover {
  background: #c62828;
}
.success-icon {
  font-size: 2em;
  color: #43a047;
  margin-bottom: 0.4em;
  display: block;
}
.footer {
  margin-top: 2em;
  color: #aaa;
  font-size: 0.92em;
  letter-spacing: 1px;
}
.privacy-link {
  color: #1976d2;
  text-decoration: underline;
  margin-left: 8px;
  font-size: 0.9em;
}
.hidden {
  display: none !important;
}
@media (max-width: 480px) {
  .container {
    padding: 1.2em 0.5em;
    max-width: 98vw;
  }
  h1 { font-size: 1.3em; }
  .logo-img { width: 60px; height: 60px;}
}
.spinner {
  margin: 1em auto;
  width: 36px;
  height: 36px;
  border: 4px solid #e3f2fd;
  border-top: 4px solid #c62828;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
}
@keyframes spin {
  0% { transform: rotate(0deg);}
  100% { transform: rotate(360deg);}
}
/* Google Sign-In button tweaks */
.google-signin-btn img {
  display: block;
  margin: 0 auto;
  border-radius: 4px;
  box-shadow: 0 2px 8px #e3e3e3;
}