/* CSS Variables for theming */
:root {
  /* Light theme colors */
  --bg-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --bg-secondary: rgba(255, 255, 255, 0.95);
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-input: rgba(255, 255, 255, 0.8);
  --bg-button: rgba(255, 255, 255, 0.2);
  --bg-button-secondary: rgba(255, 255, 255, 0.15);
  --bg-button-ghost: transparent;

  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --text-muted: #666;
  --text-inverse: white;

  --border-color: rgba(255, 255, 255, 0.3);
  --border-input: rgba(255, 255, 255, 0.3);
  --border-focus: #667eea;

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-button: 0 8px 25px rgba(79, 70, 229, 0.4);

  --accent-success: #10b981;
  --accent-error: #ef4444;
  --accent-warning: #f59e0b;
  --accent-info: #3b82f6;

  /* Spacing system */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  --spacing-3xl: 32px;
}

/* Dark theme colors */
[data-theme="dark"] {
  --bg-primary: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
  --bg-secondary: rgba(26, 32, 44, 0.95);
  --bg-card: rgba(45, 55, 72, 0.95);
  --bg-input: rgba(74, 85, 104, 0.8);
  --bg-button: linear-gradient(135deg, #4299e1 0%, #667eea 100%);
  --bg-button-secondary: rgba(74, 85, 104, 0.8);
  --bg-button-ghost: transparent;

  --text-primary: #ffffff;
  --text-secondary: #f7fafc;
  --text-muted: #cbd5e0;
  --text-inverse: #1a202c;

  --border-color: rgba(203, 213, 224, 0.2);
  --border-input: rgba(203, 213, 224, 0.3);
  --border-focus: #4299e1;

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-button: 0 8px 25px rgba(66, 153, 225, 0.3);

  --accent-success: #34d399;
  --accent-error: #f87171;
  --accent-warning: #fbbf24;
  --accent-info: #60a5fa;
}

/* Dark theme button text overrides */
[data-theme="dark"] .btn-primary,
[data-theme="dark"] .btn-secondary,
[data-theme="dark"] .btn-ghost {
  color: white;
}

/* Dark theme buttons inside cards */
[data-theme="dark"] .card .btn-primary {
  background: linear-gradient(135deg, #4299e1 0%, #667eea 100%);
  color: white;
  border: 2px solid transparent;
}

[data-theme="dark"] .card .btn-primary:hover {
  background: linear-gradient(135deg, #3182ce 0%, #5a67d8 100%);
  box-shadow: 0 8px 25px rgba(66, 153, 225, 0.4);
}

[data-theme="dark"] .card .btn-secondary {
  background: rgba(74, 85, 104, 0.8);
  color: white;
  border: 2px solid rgba(203, 213, 224, 0.2);
}

[data-theme="dark"] .card .btn-secondary:hover {
  background: rgba(74, 85, 104, 0.9);
  border-color: rgba(203, 213, 224, 0.3);
}

[data-theme="dark"] .card .btn-ghost {
  background: transparent;
  color: #4299e1;
  border: 1px solid rgba(66, 153, 225, 0.3);
}

[data-theme="dark"] .card .btn-ghost:hover {
  background: rgba(66, 153, 225, 0.1);
  border-color: rgba(66, 153, 225, 0.5);
}

/* Buttons inside cards (on white/light backgrounds) */
.card .btn-primary {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: white;
  border: 2px solid transparent;
}

.card .btn-primary:hover {
  background: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.4);
}

.card .btn-secondary {
  background: rgba(79, 70, 229, 0.1);
  color: #4f46e5;
  border: 2px solid rgba(79, 70, 229, 0.2);
}

.card .btn-secondary:hover {
  background: rgba(79, 70, 229, 0.15);
  border-color: rgba(79, 70, 229, 0.3);
}

.card .btn-ghost {
  background: transparent;
  color: #4f46e5;
  border: 1px solid rgba(79, 70, 229, 0.3);
}

.card .btn-ghost:hover {
  background: rgba(79, 70, 229, 0.1);
  border-color: rgba(79, 70, 229, 0.5);
}

* {
  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: var(--bg-primary);
  background-attachment: fixed;
  color: var(--text-primary);
  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: var(--bg-secondary);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xl);
}

.logo {
  display: flex;
  align-items: center;
}

.logo-icon {
  font-size: 24px;
  margin-right: var(--spacing-md);
}

.logo h1 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.btn-icon-only {
  background: var(--bg-button-ghost);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

.btn-icon-only:hover {
  background: var(--bg-input);
  color: var(--text-primary);
}

.status-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--spacing-md);
}

.status-indicator .status-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-warning);
  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

.status-indicator.connected .status-dot {
  background: var(--accent-success);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

#statusText {
  font-size: 14px;
  font-weight: 500;
  color: white;
}

/* Vault status specific styling */
.vault-status .status-indicator {
  color: white;
}

.vault-status #statusText {
  color: white;
}

/* Enhanced lock button styling */
#lockBtn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 13px;
  border-radius: 8px;
}

#lockBtn svg {
  width: 14px;
  height: 14px;
}

/* Vault status lock button styling */
.vault-status #lockBtn {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
}

.vault-status #lockBtn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}



/* Sections */
.section {
  padding: var(--spacing-xl);
  flex: 1;
}

.section:last-child {
  padding-bottom: var(--spacing-xl);
}

.section.hidden {
  display: none;
}

/* Center the auth section */
#authSection {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 120px); /* Account for header height */
  padding: var(--spacing-3xl) var(--spacing-xl);
}

#authSection .card {
  width: 100%;
  max-width: 350px;
  margin: 0;
}

.hidden {
  display: none !important;
}

/* Cards */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
}

.card h2, .card h3 {
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  font-weight: 600;
}

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

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

/* Forms */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-row {
  display: flex;
  gap: var(--spacing-sm);
  align-items: end;
}



label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 14px;
}

input, select, textarea {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--border-input);
  border-radius: 12px;
  background: var(--bg-input);
  font-size: 14px;
  color: var(--text-primary);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Placeholder styling */
input::placeholder, textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

/* Dark theme placeholder styling */
[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
  color: #e2e8f0;
  opacity: 0.8;
}

.select {
  flex: 1;
}

/* Buttons */
.btn {
  padding: var(--spacing-md) var(--spacing-2xl);
  border: none;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: var(--bg-button);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-primary:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-secondary {
  background: var(--bg-button-secondary);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-ghost {
  background: var(--bg-button-ghost);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-small {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 12px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.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: var(--text-secondary);
}

@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: var(--spacing-sm);
  padding: var(--spacing-sm);
  color: var(--text-muted);
  font-size: 14px;
}

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

.button-group {
  display: flex;
  gap: var(--spacing-md);
}

.btn-copy {
  background: var(--bg-button-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  color: var(--text-secondary);
  flex-shrink: 0;
  height: fit-content;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
}

.btn-copy:hover {
  background: rgba(102, 126, 234, 0.1);
  border-color: rgba(102, 126, 234, 0.3);
}

.encrypt-result .btn-copy:hover {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
}

.decrypt-result .btn-copy:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.3);
}

.btn-copy svg {
  width: 14px;
  height: 14px;
  stroke-width: 2;
}

/* Vault Header */
.vault-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

/* Vault Status Section */
.vault-status {
  padding: 0 0 var(--spacing-lg) 0;
  margin-bottom: var(--spacing-lg);
}

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

/* Add Keypair Toggle */
.add-keypair-toggle {
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.btn-icon {
  margin-right: var(--spacing-sm);
  font-weight: bold;
}

.add-keypair-form {
  max-height: 0;
  overflow: hidden;
  padding: 0;
  margin-bottom: 0;
}

.add-keypair-form:not(.hidden) {
  max-height: 300px;
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

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

.form-header h3 {
  margin: 0;
  color: var(--text-primary);
}

.btn-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 6px;
  line-height: 1;
}

.btn-close:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-error);
}



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

/* Keypairs List */
.keypairs-list {
  max-height: 240px;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--spacing-xs);
  margin: -var(--spacing-xs);
}

.keypair-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-radius: 12px;
  margin-bottom: var(--spacing-md);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  min-width: 0; /* Allow flex items to shrink */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.keypair-item:last-child {
  margin-bottom: 0;
}

.keypair-item:hover {
  background: var(--bg-card);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.keypair-item.selected {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--accent-success);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.15);
}

.keypair-item.selected .keypair-name {
  color: var(--accent-success);
  font-weight: 600;
}

.keypair-item.selected .keypair-type {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-success);
}

.keypair-item.selected .select-btn {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-success);
  border-color: rgba(16, 185, 129, 0.3);
}

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

.select-btn {
  background: var(--bg-button-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}

.select-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.keypair-info {
  flex: 1;
  min-width: 0; /* Allow shrinking */
  margin-right: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.keypair-name {
  font-weight: 500;
  color: var(--text-primary);
  word-break: break-word; /* Break long names */
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 14px;
  line-height: 1.4;
}

.keypair-type {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(102, 126, 234, 0.15);
  padding: 2px 6px;
  border-radius: 6px;
  display: inline-block;
  width: fit-content;
  max-width: fit-content;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.empty-state, .loading {
  text-align: center;
  color: var(--text-muted);
  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: var(--text-secondary);
  margin: 0;
}

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

.keypair-info code, .signature-result code, .encrypt-result code, .decrypt-result code {
  background: var(--bg-input);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 12px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  word-break: break-all;
  flex: 1;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  line-height: 1.4;
  max-height: 120px;
  overflow-y: auto;
  white-space: pre-wrap;
}

.encrypt-result code {
  background: var(--bg-card);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--text-primary);
}

.decrypt-result code {
  background: var(--bg-card);
  border-color: rgba(59, 130, 246, 0.2);
  color: var(--text-primary);
}

/* 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 label {
  color: var(--accent-success);
  font-weight: 500;
  margin-bottom: 8px;
}

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-secondary);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  color: var(--text-primary);
}



.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(102, 126, 234, 0.3);
  border-top: 3px solid var(--border-focus);
  border-radius: 50%;
  margin-bottom: 16px;
}

/* Enhanced Toast Notifications */
.toast-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  min-width: 320px;
  max-width: 400px;
  padding: 16px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  z-index: 1001;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border: 1px solid transparent;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-notification.toast-show {
  transform: translateX(0);
  opacity: 1;
}

.toast-notification.toast-hide {
  transform: translateX(100%);
  opacity: 0;
}

.toast-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin-top: 2px;
}

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-message {
  line-height: 1.5;
  word-wrap: break-word;
}

.toast-close {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 18px;
  font-weight: bold;
  line-height: 1;
  opacity: 0.7;
  padding: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.2s ease;
  flex-shrink: 0;
  margin-top: 2px;
}

.toast-close:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.1);
}

/* Success Toast */
.toast-success {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.95) 0%, rgba(5, 150, 105, 0.95) 100%);
  color: white;
  border-color: rgba(16, 185, 129, 0.3);
}

.toast-success .toast-icon {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* Error Toast */
.toast-error {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.95) 0%, rgba(220, 38, 38, 0.95) 100%);
  color: white;
  border-color: rgba(239, 68, 68, 0.3);
}

.toast-error .toast-icon {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* Info Toast */
.toast-info {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.95) 0%, rgba(37, 99, 235, 0.95) 100%);
  color: white;
  border-color: rgba(59, 130, 246, 0.3);
}

.toast-info .toast-icon {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* Responsive toast positioning */
@media (max-width: 480px) {
  .toast-notification {
    left: 16px;
    right: 16px;
    min-width: auto;
    max-width: none;
    transform: translateY(-100%);
  }

  .toast-notification.toast-show {
    transform: translateY(0);
  }

  .toast-notification.toast-hide {
    transform: translateY(-100%);
  }
}

/* Scrollbar Styles */
.keypairs-list::-webkit-scrollbar,
.encrypt-result code::-webkit-scrollbar,
.decrypt-result code::-webkit-scrollbar,
.signature-result code::-webkit-scrollbar {
  width: 6px;
}

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

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

.keypairs-list::-webkit-scrollbar-thumb:hover,
.encrypt-result code::-webkit-scrollbar-thumb:hover,
.decrypt-result code::-webkit-scrollbar-thumb:hover,
.signature-result code::-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;
  }
}







/* Operation Tabs */
.operation-tabs {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 2px solid rgba(102, 126, 234, 0.1);
  gap: 4px;
  overflow-x: auto; /* Enable horizontal scrolling */
  overflow-y: hidden;
  scrollbar-width: none; /* Hide scrollbar in Firefox */
  -webkit-overflow-scrolling: touch; /* Smooth scrolling on mobile */
  scroll-behavior: smooth; /* Smooth scrolling animation */
}

/* Hide scrollbar for webkit browsers */
.operation-tabs::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 12px 20px;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 3px solid transparent;
  flex-shrink: 0; /* Prevent tabs from shrinking */
  min-width: fit-content;
  white-space: nowrap;
  text-align: center;
}

.tab-btn:hover {
  background: rgba(102, 126, 234, 0.1);
  color: var(--border-focus);
}

.tab-btn.active {
  background: rgba(102, 126, 234, 0.1);
  color: var(--border-focus);
  border-bottom-color: var(--border-focus);
  font-weight: 600;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Result Styling */
.encrypt-result, .decrypt-result, .verify-result {
  margin-top: 16px;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(102, 126, 234, 0.2);
}

.encrypt-result {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.2);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.1);
}

.encrypt-result label {
  color: var(--accent-success);
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
  font-size: 14px;
}

.decrypt-result {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.2);
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.1);
}

.decrypt-result label {
  color: var(--accent-info);
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
  font-size: 14px;
}

.verify-result {
  background: rgba(102, 126, 234, 0.1);
  border-color: rgba(102, 126, 234, 0.2);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.1);
}

.verification-status {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 600;
}

.verification-status.valid {
  color: var(--accent-success);
}

.verification-status.invalid {
  color: var(--accent-error);
}

.verification-status.valid #verificationIcon {
  color: var(--accent-success);
}

.verification-status.invalid #verificationIcon {
  color: var(--accent-error);
}