:root {
  font-family: "Segoe UI", Arial, sans-serif;
  background-color: #f2f5f9;
  color: #212529;
}

body {
  margin: 0;
  padding: 0 0 4rem;
  position: relative;
}

/* Language selector in top right */
.language-selector {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
}

.language-selector select {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 2px solid #1e3c72;
  background-color: #ffffff;
  color: #1e3c72;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.1);
  transition: all 0.2s ease;
}

.language-selector select:hover {
  background-color: #f0f4ff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

.app-header {
  background: linear-gradient(135deg, #2a5298, #1e3c72);
  color: #ffffff;
  padding: 2rem;
  text-align: center;
}

.app-header h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
}

.app-header .subtitle {
  margin: 0;
  font-size: 1rem;
  opacity: 0.8;
}

.app-body {
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  display: grid;
  gap: 1.5rem;
}

.card {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  padding: 1.5rem;
}

.card h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

button {
  background-color: #1e3c72;
  border: none;
  border-radius: 8px;
  color: #ffffff;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  margin-top: 0.75rem;
  transition: transform 0.1s ease-in-out;
}

button:hover {
  transform: translateY(-1px);
}

input,
textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  margin-top: 0.5rem;
  border-radius: 8px;
  border: 1px solid #d0d7e2;
  font-size: 0.95rem;
}

.info-panel {
  background: #f0f4ff;
  border-radius: 8px;
  border: 1px solid #c7d2fe;
  padding: 0.75rem;
  font-family: "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  overflow-x: auto;
  transition: all 0.3s ease;
}

.info-panel.highlight {
  background: #fff3cd;
  border: 2px solid #ffc107;
  box-shadow: 0 0 20px rgba(255, 193, 7, 0.5);
  animation: highlightPulse 2s ease-in-out;
}

@keyframes highlightPulse {
  0% {
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.5);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 30px rgba(255, 193, 7, 0.8);
    transform: scale(1.02);
  }
  100% {
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.5);
    transform: scale(1);
  }
}

.list-panel {
  max-height: 340px;
  overflow-y: auto;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem;
  background: #f8fafc;
}

.list-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid #e2e8f0;
}

.list-item:last-child {
  border-bottom: none;
}

.list-item strong {
  display: block;
}

.button-row {
  display: flex;
  gap: 1rem;
}

.muted {
  color: #64748b;
  font-size: 0.85rem;
}

/* User banner displayed when logged in */
.user-banner {
  background: linear-gradient(135deg, #2a5298, #1e3c72);
  color: #ffffff;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

.banner-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.banner-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.copy-button {
  background-color: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff;
  margin-top: 0;
}

.copy-button:hover {
  background-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

/* Auth buttons shown when not logged in */
.auth-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.auth-buttons button {
  margin-top: 0;
  min-width: 120px;
}

/* Main navigation menu shown when logged in */
.main-navigation {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

.nav-button {
  margin-top: 0;
  min-width: 150px;
  background-color: #e2e8f0;
  color: #475569;
  border: 2px solid transparent;
  transition: all 0.2s ease;
}

.nav-button:hover {
  background-color: #cbd5e1;
  transform: translateY(-1px);
}

.nav-button.active {
  background-color: #1e3c72;
  color: #ffffff;
  border-color: #2a5298;
  box-shadow: 0 2px 8px rgba(30, 60, 114, 0.3);
}

/* Messages grid layout - responsive two columns */
.messages-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.messages-column {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1rem;
  background-color: #f9f9f9;
}

.messages-column h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: #1e3c72;
}

.messages-column .list-item {
  background-color: white;
  border-radius: 4px;
  border: 1px solid #e0e0e0;
  padding: 0.75rem;
  margin-bottom: 1rem;
}

.messages-column .list-item:last-child {
  margin-bottom: 0;
}

/* Password requirements styling */
.password-requirements {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
}

.password-requirements .requirements-title {
  margin: 0 0 0.5rem 0;
  font-size: 0.9rem;
  color: #1e3c72;
}

.password-requirements .requirements-list {
  margin: 0;
  padding-left: 1.25rem;
  list-style-type: none;
}

.password-requirements .requirements-list li {
  margin: 0.35rem 0;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}

.password-requirements .requirements-list li::before {
  content: "○ ";
  margin-right: 0.5rem;
}

/* Loading overlay and spinner */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.loading-spinner {
  background: #ffffff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.2);
  text-align: center;
  min-width: 250px;
}

.spinner {
  border: 4px solid #e2e8f0;
  border-top: 4px solid #1e3c72;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-text {
  color: #475569;
  font-size: 0.95rem;
  margin: 0;
  font-weight: 500;
}

/* Responsive: stack columns on smaller screens */
@media (max-width: 768px) {
  .messages-grid {
    grid-template-columns: 1fr;
  }
}