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

body {
  width: 400px;
  min-height: 600px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-attachment: fixed;
  color: #333;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

.container {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  padding: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.logo {
  display: flex;
  align-items: center;
  margin-bottom: 12px;
}

.logo-icon {
  font-size: 24px;
  margin-right: 12px;
}

.logo h1 {
  font-size: 20px;
  font-weight: 600;
  color: #2d3748;
}

.status-indicator {
  display: flex;
  align-items: center;
  font-size: 14px;
  color: #666;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #fbbf24;
  margin-right: 8px;
  animation: pulse 2s infinite;
}

.status-indicator.connected .status-dot {
  background-color: #10b981;
  animation: none;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Sections */
.section {
  padding: 20px;
  flex: 1;
}

.section:last-child {
  padding-bottom: 20px;
}

.section.hidden {
  display: none;
}

.completely-hidden {
  display: none !important;
}

/* Cards */
.card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.card h2, .card h3 {
  margin-bottom: 16px;
  color: #2d3748;
  font-weight: 600;
}

.card h2 {
  font-size: 18px;
}

.card h3 {
  font-size: 16px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-row {
  display: flex;
  gap: 8px;
  align-items: end;
}

label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: #4a5568;
  font-size: 14px;
}

input, select, textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  transition: all 0.2s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: #667eea;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.select {
  flex: 1;
}

/* Buttons */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.8);
  color: #4a5568;
  border: 2px solid rgba(102, 126, 234, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(102, 126, 234, 0.4);
}

.btn-ghost {
  background: transparent;
  color: #667eea;
  border: 1px solid rgba(102, 126, 234, 0.3);
}

.btn-ghost:hover {
  background: rgba(102, 126, 234, 0.1);
}

.btn-small {
  padding: 8px 16px;
  font-size: 12px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn.loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: btn-spin 0.8s linear infinite;
  color: white;
}

.btn-secondary.loading::after {
  color: #4a5568;
}

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

/* Inline Loading Components */
.inline-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px;
  color: #666;
  font-size: 14px;
}

.inline-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(102, 126, 234, 0.2);
  border-top: 2px solid #667eea;
  border-radius: 50%;
  animation: btn-spin 0.8s linear infinite;
}

.button-group {
  display: flex;
  gap: 12px;
}

.btn-copy {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: background 0.2s ease;
}

.btn-copy:hover {
  background: rgba(102, 126, 234, 0.1);
}

/* Vault Header */
.vault-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.vault-header h2 {
  color: white;
  font-size: 20px;
  font-weight: 600;
}

/* Add Keypair Toggle */
.add-keypair-toggle {
  margin-bottom: 16px;
  text-align: center;
}

.btn-icon {
  margin-right: 8px;
  font-weight: bold;
  transition: transform 0.2s ease;
}

.add-keypair-form {
  transform: translateY(-10px);
  opacity: 0;
  transition: all 0.3s ease;
  max-height: 0;
  overflow: hidden;
  padding: 0;
  margin-bottom: 0;
}

.add-keypair-form:not(.hidden) {
  transform: translateY(0);
  opacity: 1;
  max-height: 300px;
  padding: 20px;
  margin-bottom: 16px;
}

.form-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(102, 126, 234, 0.1);
}

.form-header h3 {
  margin: 0;
  color: #2d3748;
}

.btn-close {
  background: none;
  border: none;
  font-size: 20px;
  color: #666;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: all 0.2s ease;
  line-height: 1;
}

.btn-close:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.form-content {
  animation: slideInUp 0.3s ease-out;
}

.form-actions {
  margin-top: 16px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* Keypairs List */
.keypairs-list {
  max-height: 200px;
  overflow-y: auto;
  overflow-x: hidden;
}

.keypair-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  background: rgba(102, 126, 234, 0.05);
  border: 1px solid rgba(102, 126, 234, 0.1);
  transition: all 0.2s ease;
  min-width: 0; /* Allow flex items to shrink */
}

.keypair-item:hover {
  background: rgba(102, 126, 234, 0.1);
  transform: translateX(4px);
}

.keypair-item.selected {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
  transform: translateX(4px);
}

.keypair-item.selected .keypair-name {
  color: #065f46;
  font-weight: 600;
}

.keypair-item.selected .select-btn {
  background: rgba(16, 185, 129, 0.2);
  color: #065f46;
  border-color: rgba(16, 185, 129, 0.3);
}

.keypair-item.selected .select-btn:hover {
  background: rgba(16, 185, 129, 0.3);
}

.keypair-info {
  flex: 1;
  min-width: 0; /* Allow shrinking */
  margin-right: 12px;
}

.keypair-name {
  font-weight: 500;
  color: #2d3748;
  word-break: break-word; /* Break long names */
  overflow: hidden;
  text-overflow: ellipsis;
}

.keypair-type {
  font-size: 12px;
  color: #666;
  background: rgba(102, 126, 234, 0.1);
  padding: 2px 8px;
  border-radius: 12px;
  margin-top: 4px;
}

.empty-state, .loading {
  text-align: center;
  color: #666;
  font-style: italic;
  padding: 20px;
}

/* Selected Keypair Info */
.keypair-info .info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(102, 126, 234, 0.1);
}

.keypair-info .info-row:last-child {
  border-bottom: none;
}

.keypair-info label {
  font-weight: 500;
  color: #4a5568;
  margin: 0;
}

.public-key-container, .signature-container {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  margin-left: 12px;
}

.keypair-info code, .signature-result code {
  background: rgba(102, 126, 234, 0.1);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 11px;
  word-break: break-all;
  flex: 1;
  color: #2d3748;
}

/* Signature Result */
.signature-result {
  margin-top: 16px;
  padding: 16px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: 12px;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.signature-result.hidden {
  display: none;
}

.signature-result label {
  color: #065f46;
  font-weight: 500;
  margin-bottom: 8px;
}

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-overlay.hidden {
  display: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(102, 126, 234, 0.3);
  border-top: 3px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

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

/* Toast Notifications */
.toast {
  position: fixed;
  top: 20px;
  left: 20px;
  right: 20px;
  max-width: 360px;
  margin: 0 auto;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  z-index: 1001;
  transform: translateY(-100px);
  opacity: 0;
  transition: all 0.3s ease;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.toast:not(.hidden) {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  background: rgba(16, 185, 129, 0.9);
  color: white;
  border: 1px solid rgba(16, 185, 129, 1);
}

.toast.error {
  background: rgba(239, 68, 68, 0.9);
  color: white;
  border: 1px solid rgba(239, 68, 68, 1);
}

.toast.info {
  background: rgba(59, 130, 246, 0.9);
  color: white;
  border: 1px solid rgba(59, 130, 246, 1);
}

/* Scrollbar Styles */
.keypairs-list::-webkit-scrollbar {
  width: 6px;
}

.keypairs-list::-webkit-scrollbar-track {
  background: rgba(102, 126, 234, 0.1);
  border-radius: 3px;
}

.keypairs-list::-webkit-scrollbar-thumb {
  background: rgba(102, 126, 234, 0.3);
  border-radius: 3px;
}

.keypairs-list::-webkit-scrollbar-thumb:hover {
  background: rgba(102, 126, 234, 0.5);
}

/* Responsive adjustments */
@media (max-width: 400px) {
  body {
    width: 350px;
  }

  .form-row {
    flex-direction: column;
    gap: 12px;
  }

  .button-group {
    flex-direction: column;
  }
}

/* Animation for card entrance */
.card {
  animation: slideInUp 0.3s ease-out;
}

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

/* Hover effects for better UX */
.keypair-item {
  position: relative;
  overflow: hidden;
}

.keypair-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.keypair-item:hover::before {
  left: 100%;
}