/* AI Agent Personality Vault - Base Styles */
/* Design Language: Developer-focused elegance (VS Code meets Linear) */

:root {
  /* Color Palette */
  --bg-primary: #0D1117;
  --bg-secondary: #161B22;
  --bg-tertiary: #21262D;
  --border: #30363D;
  --text-primary: #E6EDF3;
  --text-secondary: #8B949E;
  --accent-primary: #58A6FF;
  --accent-success: #3FB950;
  --accent-warning: #D29922;
  --accent-danger: #F85149;
  --accent-purple: #A371F7;
  --accent-cyan: #39D353;

  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Spacing Scale (base 4px) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;

  /* Transitions */
  --transition-fast: 200ms ease-out;
  --transition-normal: 300ms ease-out;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.5);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 12px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-4);
}

h1 { font-size: 2.441rem; font-weight: 700; }
h2 { font-size: 1.953rem; }
h3 { font-size: 1.563rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p { margin-bottom: var(--space-4); }

code, pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

pre {
  background: var(--bg-secondary);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-cyan);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-12) 0;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: all var(--transition-fast);
}

.card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.btn-sm { height: 28px; padding: 0 var(--space-3); font-size: 0.75rem; }
.btn-md { height: 36px; }
.btn-lg { height: 44px; padding: 0 var(--space-6); font-size: 1rem; }

.btn-primary {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.btn-primary:hover:not(:disabled) {
  background: #79b8ff;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-tertiary);
  border-color: var(--text-secondary);
}

.btn-danger {
  background: var(--accent-danger);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #ff6b61;
}

.btn-success {
  background: var(--accent-success);
  color: var(--bg-primary);
}

.btn-icon {
  background: transparent;
  color: var(--text-secondary);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}

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

/* Form Elements */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--accent-danger);
}

.form-error {
  font-size: 0.75rem;
  color: var(--accent-danger);
  margin-top: var(--space-1);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-helper {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

/* Toggle Switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: var(--transition-fast);
}

.toggle input:checked + .toggle-slider {
  background: var(--accent-primary);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
  background: white;
}

/* Slider */
.slider-container {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.slider {
  flex: 1;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  appearance: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent-primary);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.slider-value {
  min-width: 24px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent-primary);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.badge-primary { background: rgba(88, 166, 255, 0.2); color: var(--accent-primary); }
.badge-success { background: rgba(63, 185, 80, 0.2); color: var(--accent-success); }
.badge-warning { background: rgba(210, 153, 34, 0.2); color: var(--accent-warning); }
.badge-danger { background: rgba(248, 81, 73, 0.2); color: var(--accent-danger); }
.badge-purple { background: rgba(163, 113, 247, 0.2); color: var(--accent-purple); }

/* Rating Stars */
.rating {
  display: flex;
  gap: 2px;
}

.star {
  color: var(--bg-tertiary);
  font-size: 1rem;
}

.star.filled {
  color: var(--accent-warning);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border);
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.toast-success { border-left: 3px solid var(--accent-success); }
.toast-error { border-left: 3px solid var(--accent-danger); }
.toast-warning { border-left: 3px solid var(--accent-warning); }
.toast-info { border-left: 3px solid var(--accent-primary); }

.toast-message {
  flex: 1;
  font-size: 0.875rem;
}

/* Dropdown */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 180px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
}

.dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--bg-tertiary);
}

.dropdown-item:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.dropdown-item:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* Tabs */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  gap: var(--space-1);
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-6);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -25px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--bg-secondary);
  border: 2px solid var(--accent-primary);
  border-radius: 50%;
}

.timeline-item.active::before {
  background: var(--accent-primary);
}

.timeline-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.timeline-title {
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.timeline-content {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.empty-state-icon {
  font-size: 3rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.empty-state-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

.empty-state-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Pulse Animation */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* Grid Layout */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Spacing Utilities */
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

/* Text Utilities */
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--accent-success); }
.text-danger { color: var(--accent-danger); }
.text-center { text-align: center; }
.font-mono { font-family: var(--font-mono); }
.font-bold { font-weight: 700; }

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border);
}

/* Selection */
::selection {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

/* Focus Visible */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}