body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  background-color: #f4f4f4;
}

.main-wrapper {
  max-width: 700px;
  margin: 60px auto;
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.tab-nav {
  display: flex;
  width: 100%;
}

.tab-nav button {
  flex: 1;
  padding: 14px;
  background-color: #dce6f8;
  border: none;
  font-weight: bold;
  font-size: 16px;
  cursor: default;
  transition: background-color 0.3s ease;
}

.tab-nav button.active {
  background-color: #4a90e2;
  color: white;
}

.tab-content {
  padding: 30px 40px;
  animation: fade 0.5s ease;
}

@keyframes fade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

label {
  display: block;
  margin-top: 15px;
  font-weight: bold;
}

label .required {
  color: red;
}

input,
select,
textarea {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 14px;
  box-sizing: border-box;
}

textarea {
  resize: vertical;
  min-height: 80px;
}

.row {
  display: flex;
  gap: 10px;
}

.row > div {
  flex: 1;
}

button.submit-btn {
  background-color: #4a90e2;
  color: white;
  padding: 12px;
  width: 100%;
  border: none;
  border-radius: 5px;
  font-size: 16px;
  cursor: pointer;
  margin-top: 20px;
}

button.submit-btn:hover {
  background-color: #357ab8;
}

.copy-box {
  display: flex;
  align-items: center;
  margin-top: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.copy-box input {
  flex: 1;
}

.copy-box button {
  padding: 8px 12px;
  background-color: #555;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
}

.copy-box button:hover {
  background-color: #444;
}

.error-msg {
  font-size: 13px;
  color: red;
  margin-top: 5px;
  font-style: italic;
  opacity: 0;
  max-height: 0;
  transition: opacity 0.5s ease, max-height 0.5s ease, margin 0.5s ease;
  overflow: hidden;
}

.error-show {
  opacity: 1;
  max-height: 40px;
  margin-top: 5px;
}

.copied-msg {
  font-size: 13px;
  color: green;
  margin-top: 5px;
  display: none;
  font-style: italic;
}

.back-link {
  font-size: 14px;
  color: #4a90e2;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

.footer {
  text-align: center;
  font-size: 13px;
  color: #646262;
  margin: 60px auto 20px;
  padding: 0 20px;
}

.footer img {
  max-width: 120px;
  margin: 0 auto 8px;
  display: block;
}

.hidden {
  display: none !important;
}

.error-dialog {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.error-dialog-box {
  background: #fff;
  padding: 30px 40px;
  border-radius: 8px;
  text-align: center;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  animation: popupFade 0.3s ease-in-out;
}

@keyframes popupFade {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.error-icon {
  font-size: 48px;
  margin-bottom: 15px;
  color: #d9534f;
  font-weight: 700;
}

.error-message-text {
  color: red;
  font-weight: 600;
  font-size: 16px;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  margin-bottom: 20px;
}

.error-dialog-box button {
  padding: 10px 20px;
  border: none;
  background: #4a90e2;
  color: white;
  font-size: 14px;
  border-radius: 5px;
  cursor: pointer;
}

@media (max-width: 600px) {
  .tab-content {
    padding: 20px;
  }

  .row {
    flex-direction: column;
  }

  .tab-nav button {
    font-size: 14px;
    padding: 12px 10px;
  }

  .copy-box {
    flex-direction: column;
    align-items: stretch;
  }

  .copy-box button {
    width: 100%;
  }
}