/* Auth Modal Overlay */
#auth-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.4s ease-out;
}

#auth-modal {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 20px;
  padding: 40px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: scaleUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.auth-header {
  text-align: center;
}

.auth-header h2 {
  font-size: 24px;
  color: var(--text-color);
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-header p {
  color: #666;
  font-size: 14px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-color);
  margin-left: 4px;
}

.input-group input {
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.5);
  font-size: 15px;
  transition: all 0.2s ease;
  outline: none;
}

.input-group input:focus {
  background: white;
  border-color: #286BBD;
  box-shadow: 0 0 0 3px rgba(40, 107, 189, 0.15);
}

.auth-btn {
  background: linear-gradient(135deg, #286BBD, #14498A);
  color: white;
  border: none;
  border-radius: 12px;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 10px rgba(40, 107, 189, 0.3);
  margin-top: 10px;
}

.auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(40, 107, 189, 0.4);
}

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

.auth-footer {
  text-align: center;
  font-size: 14px;
  color: #666;
}

.auth-toggle {
  color: #286BBD;
  background: none;
  border: none;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  font-size: inherit;
}

.auth-toggle:hover {
  text-decoration: underline;
}

.auth-error {
  background: #ffebee;
  color: #c62828;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  text-align: center;
  display: none;
}

.auth-error.visible {
  display: block;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}