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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

body::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  top: -250px;
  right: -250px;
  animation: float 20s infinite ease-in-out;
}

body::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  bottom: -200px;
  left: -200px;
  animation: float 15s infinite ease-in-out reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(180deg); }
}

.auth-wrapper {
  width: 100%;
  max-width: 450px;
  position: relative;
  z-index: 1;
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 48px 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35);
}

.logo-container {
  text-align: center;
  margin-bottom: 32px;
}

.logo-container img {
  max-width: 180px;
  height: auto;
  margin-bottom: 12px;
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.beta-tag {
  display: inline-block;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

h1 {
  font-size: 32px;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 32px;
  text-align: center;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #4a5568;
  margin-bottom: 8px;
}

#phoneNumber, #codeField {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  transition: all 0.3s ease;
  background: white;
  font-family: inherit;
}

#phoneNumber:focus, #codeField:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.iti {
  width: 100%;
}

.iti__flag-container {
  padding: 14px 12px;
}

#recaptcha-container {
  /* Hidden for invisible reCAPTCHA - container still needed by Firebase */
  display: none;
}

.btn {
  width: 100%;
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: white;
  color: #667eea;
  border: 2px solid #667eea;
  box-shadow: 0 2px 10px rgba(102, 126, 234, 0.2);
}

.btn-secondary:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 32px 0;
  color: #a0aec0;
  font-size: 14px;
  font-weight: 600;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  border-bottom: 2px solid #e2e8f0;
}

.divider span {
  padding: 0 16px;
}

.signup-section {
  text-align: center;
}

.signup-section p {
  font-size: 15px;
  color: #4a5568;
  margin-bottom: 16px;
  font-weight: 500;
}

.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Message Toast Styles */
.message-toast {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInDown 0.3s ease-out;
  white-space: nowrap;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.message-toast.success {
  background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
  color: white;
}

.message-toast.error {
  background: linear-gradient(135deg, #fc8181 0%, #e53e3e 100%);
  color: white;
}

.message-icon {
  font-size: 18px;
  font-weight: bold;
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translate(-50%, -20px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@media (max-width: 480px) {
  .card {
    padding: 32px 24px;
  }

  h1 {
    font-size: 26px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 15px;
  }

  .logo-container img {
    max-width: 150px;
  }

  .message-toast {
    font-size: 12px;
    padding: 10px 16px;
    top: -50px;
  }
}

.loading {
  pointer-events: none;
  opacity: 0.6;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 3px solid #ffffff;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}