/* MinouChat Design System - theme.css */
/* Art Deco Inspired • Minimal • Thin Lines • Mobile-First */

/* ============================================
   FONTS - Single unified typeface
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500&display=swap');

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */

:root {
  /* Typography - Single font throughout */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Inter', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;

  /* Font Weights - Lighter overall */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 500;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

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

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ============================================
   LIGHT THEME (Default)
   ============================================ */

.theme-light,
:root {
  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-tertiary: #f0f0f0;
  --bg-inverse: #111111;

  /* Text */
  --text-primary: #111111;
  --text-secondary: #555555;
  --text-muted: #888888;
  --text-inverse: #ffffff;

  /* Borders */
  --border-color: #e0e0e0;
  --border-subtle: #f0f0f0;
  --border-strong: #cccccc;

  /* Pop Colors (accents) */
  --pop-primary: #3b82f6;
  --pop-primary-hover: #2563eb;
  --pop-success: #10b981;
  --pop-success-hover: #059669;
  --pop-warning: #f59e0b;
  --pop-warning-hover: #d97706;
  --pop-danger: #ef4444;
  --pop-danger-hover: #dc2626;

  /* Input */
  --input-bg: #ffffff;
  --input-border: #e0e0e0;
  --input-focus: #111111;

  /* Scrollbar */
  --scrollbar-track: #f0f0f0;
  --scrollbar-thumb: #cccccc;
  --scrollbar-thumb-hover: #aaaaaa;
}

/* ============================================
   DARK THEME
   ============================================ */

.theme-dark {
  /* Backgrounds */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-inverse: #f5f5f5;

  /* Text */
  --text-primary: #f5f5f5;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --text-inverse: #0a0a0a;

  /* Borders */
  --border-color: #222222;
  --border-subtle: #1a1a1a;
  --border-strong: #333333;

  /* Pop Colors (slightly brighter in dark) */
  --pop-primary: #60a5fa;
  --pop-primary-hover: #3b82f6;
  --pop-success: #34d399;
  --pop-success-hover: #10b981;
  --pop-warning: #fbbf24;
  --pop-warning-hover: #f59e0b;
  --pop-danger: #f87171;
  --pop-danger-hover: #ef4444;

  /* Input */
  --input-bg: #111111;
  --input-border: #333333;
  --input-focus: #f5f5f5;

  /* Scrollbar */
  --scrollbar-track: #1a1a1a;
  --scrollbar-thumb: #333333;
  --scrollbar-thumb-hover: #444444;
}

/* ============================================
   BASE RESET & TYPOGRAPHY
   ============================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-light);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  letter-spacing: 0.01em;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-normal);
  line-height: 1.3;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

h1 { font-size: var(--text-3xl); font-weight: var(--font-light); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

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

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

a:hover {
  color: var(--pop-primary);
}

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

code {
  background: var(--bg-tertiary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
}

pre {
  background: var(--bg-secondary);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

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

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

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }
.container-xl { max-width: 1280px; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.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); }
.gap-8 { gap: var(--space-8); }

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

/* ============================================
   SPACING UTILITIES
   ============================================ */

.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* ============================================
   TEXT UTILITIES
   ============================================ */

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }

.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-pop { color: var(--pop-primary); }
.text-success { color: var(--pop-success); }
.text-warning { color: var(--pop-warning); }
.text-danger { color: var(--pop-danger); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================
   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-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1.5;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

/* Primary Button */
.btn-primary {
  background: var(--bg-inverse);
  color: var(--text-inverse);
  border-color: var(--bg-inverse);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.9;
}

/* Secondary Button */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

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

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-secondary);
}

/* Pop Button (accent color) */
.btn-pop {
  background: var(--pop-primary);
  color: white;
  border-color: var(--pop-primary);
}

.btn-pop:hover:not(:disabled) {
  background: var(--pop-primary-hover);
  border-color: var(--pop-primary-hover);
}

/* Danger Button */
.btn-danger {
  background: var(--pop-danger);
  color: white;
  border-color: var(--pop-danger);
}

.btn-danger:hover:not(:disabled) {
  background: var(--pop-danger-hover);
  border-color: var(--pop-danger-hover);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

/* Icon Button */
.btn-icon {
  padding: var(--space-2);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
}

/* ============================================
   FORM INPUTS
   ============================================ */

.form-group {
  margin-bottom: var(--space-4);
}

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.05);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

/* Underline Input Style */
.form-input-underline {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-color);
  border-radius: 0;
  padding: var(--space-2) 0;
}

.form-input-underline:focus {
  border-bottom-color: var(--text-primary);
  box-shadow: none;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--pop-danger);
}

.form-hint {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--pop-primary);
  cursor: pointer;
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-fast);
}

.card:hover {
  border-color: var(--border-strong);
}

.card-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.card-body {
  flex: 1;
}

.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

/* Clickable Card */
.card-clickable {
  cursor: pointer;
}

.card-clickable:hover {
  border-color: var(--pop-primary);
}

/* ============================================
   TABLES
   ============================================ */

.table-wrapper {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.table th {
  font-weight: var(--font-medium);
  color: var(--text-muted);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table tbody tr:hover {
  background: var(--bg-secondary);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   STATUS DOTS
   ============================================ */

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
}

.status-dot-success { background: var(--pop-success); }
.status-dot-warning { background: var(--pop-warning); }
.status-dot-danger { background: var(--pop-danger); }
.status-dot-muted { background: var(--text-muted); }

/* Animated pulse */
.status-dot-pulse {
  animation: pulse 2s infinite;
}

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

/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--pop-success);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--pop-warning);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--pop-danger);
}

.badge-primary {
  background: rgba(59, 130, 246, 0.1);
  color: var(--pop-primary);
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.nav-brand {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav-link svg,
.nav-link i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ============================================
   THEME TOGGLE
   ============================================ */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  border-color: var(--border-strong);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  stroke: var(--text-primary);
  stroke-width: 1.5;
  fill: none;
}

.theme-light .theme-toggle .icon-sun { display: block; }
.theme-light .theme-toggle .icon-moon { display: none; }
.theme-dark .theme-toggle .icon-sun { display: none; }
.theme-dark .theme-toggle .icon-moon { display: block; }

/* ============================================
   MODAL / DIALOG
   ============================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.modal.show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) 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-subtle);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-secondary);
}

.modal-close svg {
  width: 20px;
  height: 20px;
  stroke: var(--text-muted);
  stroke-width: 1.5;
}

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

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

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

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

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

/* ============================================
   EMPTY STATES
   ============================================ */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  text-align: center;
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4);
  stroke: var(--text-muted);
  stroke-width: 1;
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  max-width: 300px;
}

/* ============================================
   LOADING STATES
   ============================================ */

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--text-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

.spinner-sm { width: 16px; height: 16px; border-width: 1.5px; }
.spinner-lg { width: 32px; height: 32px; border-width: 3px; }

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: var(--space-2);
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: var(--radius-full);
  animation: bounce 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* ============================================
   PROGRESS BAR
   ============================================ */

.progress {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--pop-primary);
  transition: width var(--transition-normal);
}

.progress-bar-success { background: var(--pop-success); }
.progress-bar-warning { background: var(--pop-warning); }
.progress-bar-danger { background: var(--pop-danger); }

/* ============================================
   BREADCRUMBS
   ============================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb-item a {
  color: var(--text-muted);
}

.breadcrumb-item a:hover {
  color: var(--text-primary);
}

.breadcrumb-item.active {
  color: var(--text-primary);
}

.breadcrumb-separator {
  color: var(--text-muted);
}

/* ============================================
   TOOLTIPS & HINTS
   ============================================ */

.tooltip {
  position: relative;
}

.tooltip-content {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-inverse);
  color: var(--text-inverse);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-2);
}

.tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* Help icon */
.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--text-muted);
  color: var(--text-muted);
  font-size: 10px;
  cursor: help;
}

/* ============================================
   DROPDOWN
   ============================================ */

.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 180px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  margin-top: var(--space-2);
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

.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);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-1) 0;
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

/* NOTE: .hide-mobile and .show-mobile only modify visibility on mobile
   They do NOT set display values on desktop to avoid overriding flex/grid layouts */

.show-mobile {
  display: none !important;
}

.hide-tablet {
  display: block;
}

.show-tablet {
  display: none !important;
}

/* ============================================
   TABLET BREAKPOINT (max-width: 1024px)
   ============================================ */

@media (max-width: 1024px) {
  .hide-tablet {
    display: none !important;
  }

  .show-tablet {
    display: block !important;
  }

  .show-tablet.flex {
    display: flex !important;
  }

  /* Navigation adjustments for tablet */
  .nav-links {
    gap: var(--space-4);
  }

  .nav-link {
    font-size: var(--text-xs);
  }

  /* Grid adjustments */
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Container width */
  .container {
    max-width: 100%;
    padding: 0 var(--space-4);
  }

  /* Chat sidebar narrower */
  .chat-sidebar {
    width: 200px;
  }
}

/* ============================================
   MOBILE BREAKPOINT (max-width: 768px)
   ============================================ */

@media (max-width: 768px) {
  /* Visibility utilities */
  .hide-mobile {
    display: none !important;
  }

  .show-mobile {
    display: block !important;
  }

  .show-mobile.flex {
    display: flex !important;
  }

  /* Typography scaling for mobile */
  :root {
    --text-xs: 0.7rem;
    --text-sm: 0.8rem;
    --text-base: 0.9rem;
    --text-lg: 1rem;
    --text-xl: 1.125rem;
    --text-2xl: 1.35rem;
    --text-3xl: 1.75rem;
  }

  h1 { font-size: var(--text-2xl); }
  h2 { font-size: var(--text-xl); }
  h3 { font-size: var(--text-lg); }

  /* Container adjustments */
  .container {
    padding: 0 var(--space-3);
  }

  /* Grid to single column */
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  /* Flex direction changes */
  .flex-col-mobile {
    flex-direction: column;
  }

  .gap-mobile-2 {
    gap: var(--space-2);
  }

  .gap-mobile-3 {
    gap: var(--space-3);
  }

  /* Touch-friendly buttons (min 44px touch target) */
  .btn {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
  }

  .btn-sm {
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
  }

  .btn-lg {
    min-height: 52px;
    padding: var(--space-4) var(--space-6);
  }

  .btn-icon {
    width: 44px;
    height: 44px;
  }

  /* Touch-friendly form inputs */
  .form-input,
  .form-textarea,
  .form-select {
    min-height: 44px;
    padding: var(--space-3);
    font-size: 16px; /* Prevents iOS zoom on focus */
  }

  .form-check input {
    width: 22px;
    height: 22px;
  }

  .form-group {
    margin-bottom: var(--space-3);
  }

  /* Navigation mobile */
  .nav {
    padding: var(--space-3) 0;
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .nav-brand {
    font-size: var(--text-lg);
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: space-around;
    gap: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--space-2);
  }

  .nav-link {
    padding: var(--space-2);
    font-size: var(--text-xs);
    flex-direction: column;
    gap: var(--space-1);
    text-align: center;
  }

  .nav-link svg,
  .nav-link i {
    width: 20px;
    height: 20px;
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-link.active {
    color: var(--pop-primary);
  }

  .nav-actions {
    gap: var(--space-2);
  }

  /* Mobile-first hamburger menu support */
  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
  }

  .mobile-menu-toggle svg {
    width: 24px;
    height: 24px;
    stroke: var(--text-primary);
  }

  /* Cards mobile */
  .card {
    padding: var(--space-4);
  }

  .card-header {
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .card-footer {
    margin-top: var(--space-3);
    padding-top: var(--space-3);
  }

  /* Tables mobile - horizontal scroll */
  .table-wrapper {
    margin: 0 calc(var(--space-3) * -1);
    padding: 0 var(--space-3);
    -webkit-overflow-scrolling: touch;
  }

  .table th,
  .table td {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    white-space: nowrap;
  }

  /* Modals full-width on mobile */
  .modal {
    width: 100%;
    max-width: none;
    max-height: 100vh;
    border-radius: 0;
    top: 0;
    left: 0;
    transform: none;
  }

  .modal.show {
    transform: none;
  }

  .modal-header {
    padding: var(--space-4);
  }

  .modal-body {
    padding: var(--space-4);
    max-height: calc(100vh - 120px);
  }

  .modal-footer {
    padding: var(--space-4);
    flex-wrap: wrap;
  }

  .modal-footer .btn {
    flex: 1;
    min-width: 120px;
  }

  /* Toast notifications mobile */
  .toast-container {
    top: auto;
    bottom: var(--space-4);
    left: var(--space-3);
    right: var(--space-3);
  }

  .toast {
    width: 100%;
  }

  /* Dropdown mobile */
  .dropdown-menu {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    min-width: 100%;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 60vh;
    overflow-y: auto;
    transform: translateY(100%);
  }

  .dropdown.open .dropdown-menu {
    transform: translateY(0);
  }

  .dropdown-item {
    padding: var(--space-4);
    font-size: var(--text-base);
  }

  /* Chat layout mobile */
  .chat-layout {
    flex-direction: column;
    height: calc(100vh - 60px);
  }

  .chat-sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    width: 280px;
    z-index: var(--z-modal);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }

  .chat-sidebar.open {
    transform: translateX(0);
  }

  .chat-sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal);
  }

  .chat-sidebar-backdrop.show {
    opacity: 1;
    visibility: visible;
  }

  .chat-main {
    flex: 1;
    height: 100%;
  }

  .chat-header {
    padding: var(--space-3) var(--space-4);
  }

  .chat-messages {
    padding: var(--space-4);
  }

  .chat-input-container {
    padding: var(--space-3);
  }

  .chat-input-wrapper {
    padding: var(--space-2);
  }

  .message {
    max-width: 90%;
  }

  /* Persona items touch-friendly */
  .persona-item {
    padding: var(--space-4);
    min-height: 60px;
  }

  /* File upload dropzone mobile */
  .dropzone {
    padding: var(--space-6);
  }

  .dropzone-icon {
    width: 40px;
    height: 40px;
  }

  .dropzone-text {
    font-size: var(--text-sm);
  }

  /* Empty states mobile */
  .empty-state {
    padding: var(--space-8);
  }

  .empty-state-icon {
    width: 48px;
    height: 48px;
  }

  /* Wizard mobile */
  .wizard-content {
    padding: var(--space-6) var(--space-3);
  }

  .wizard-actions {
    flex-direction: column;
    gap: var(--space-2);
  }

  .wizard-actions .btn {
    width: 100%;
  }

  /* Avatar sizes mobile */
  .avatar {
    width: 36px;
    height: 36px;
    font-size: var(--text-xs);
  }

  .avatar-sm {
    width: 28px;
    height: 28px;
  }

  .avatar-lg {
    width: 48px;
    height: 48px;
  }

  /* Theme toggle mobile */
  .theme-toggle {
    width: 44px;
    height: 44px;
  }

  /* Breadcrumbs mobile */
  .breadcrumb {
    flex-wrap: wrap;
    font-size: var(--text-xs);
  }

  /* Progress bar mobile */
  .progress {
    height: 6px;
  }

  /* Tooltips disabled on touch */
  .tooltip-content {
    display: none;
  }

  /* Spacing utilities mobile overrides */
  .p-mobile-2 { padding: var(--space-2) !important; }
  .p-mobile-3 { padding: var(--space-3) !important; }
  .p-mobile-4 { padding: var(--space-4) !important; }
  .m-mobile-0 { margin: 0 !important; }
  .m-mobile-2 { margin: var(--space-2) !important; }
  .m-mobile-3 { margin: var(--space-3) !important; }

  /* Full width on mobile */
  .w-full-mobile {
    width: 100% !important;
  }

  /* Text alignment mobile */
  .text-center-mobile {
    text-align: center !important;
  }

  /* Stack buttons on mobile */
  .btn-stack-mobile {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }

  .btn-stack-mobile .btn {
    width: 100%;
  }
}

/* ============================================
   SMALL MOBILE BREAKPOINT (max-width: 480px)
   ============================================ */

@media (max-width: 480px) {
  /* Even smaller typography */
  :root {
    --text-2xl: 1.25rem;
    --text-3xl: 1.5rem;
  }

  /* Tighter spacing */
  .container {
    padding: 0 var(--space-2);
  }

  .card {
    padding: var(--space-3);
    border-radius: var(--radius-md);
  }

  /* Navigation icons only */
  .nav-link span:not(.show-mobile) {
    display: none;
  }

  .nav-link {
    padding: var(--space-2);
  }

  /* Chat adjustments */
  .chat-messages {
    padding: var(--space-3);
  }

  .message {
    max-width: 95%;
  }

  .message-content {
    padding: var(--space-2) var(--space-3);
  }

  /* Stat cards stack */
  .stat-card-minimal {
    padding: var(--space-3);
  }

  .stat-card-minimal .stat-value {
    font-size: var(--text-xl);
  }

  /* Buttons full width */
  .btn-full-xs {
    width: 100%;
  }
}

/* ============================================
   LANDSCAPE MOBILE (orientation adjustment)
   ============================================ */

@media (max-width: 768px) and (orientation: landscape) {
  .chat-layout {
    height: calc(100vh - 50px);
  }

  .modal-body {
    max-height: calc(100vh - 100px);
  }

  /* Reduce nav height in landscape */
  .nav {
    padding: var(--space-2) 0;
  }

  .nav-links {
    padding-top: var(--space-1);
    margin-top: var(--space-1);
  }
}

/* ============================================
   SAFE AREA INSETS (for notched devices)
   ============================================ */

@supports (padding: env(safe-area-inset-top)) {
  @media (max-width: 768px) {
    body {
      padding-left: env(safe-area-inset-left);
      padding-right: env(safe-area-inset-right);
    }

    .nav {
      padding-top: max(var(--space-3), env(safe-area-inset-top));
    }

    .chat-input-container {
      padding-bottom: max(var(--space-3), env(safe-area-inset-bottom));
    }

    .modal-footer {
      padding-bottom: max(var(--space-4), env(safe-area-inset-bottom));
    }

    .toast-container {
      bottom: max(var(--space-4), env(safe-area-inset-bottom));
    }
  }
}

/* ============================================
   TOUCH INTERACTION ENHANCEMENTS
   ============================================ */

@media (hover: none) and (pointer: coarse) {
  /* Remove hover effects on touch devices */
  .btn:hover:not(:disabled) {
    /* Keep pressed state only */
  }

  .card:hover {
    border-color: var(--border-color);
  }

  /* Active/pressed state for touch */
  .btn:active:not(:disabled) {
    transform: scale(0.98);
  }

  .card-clickable:active {
    border-color: var(--pop-primary);
    transform: scale(0.99);
  }

  /* Larger touch targets for interactive elements */
  .form-check {
    min-height: 44px;
  }

  /* Prevent text selection on buttons */
  .btn {
    -webkit-user-select: none;
    user-select: none;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .hide-print {
    display: none !important;
  }

  .nav,
  .chat-sidebar,
  .theme-toggle,
  .btn,
  .toast-container {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    border: 1px solid #ccc;
    box-shadow: none;
  }
}

/* ============================================
   ONBOARDING / WIZARD STYLES
   ============================================ */

.wizard-steps {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.wizard-step {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--border-color);
  transition: all var(--transition-fast);
}

.wizard-step.active {
  background: var(--text-primary);
  width: 24px;
}

.wizard-step.completed {
  background: var(--pop-success);
}

.wizard-content {
  text-align: center;
  padding: var(--space-8) var(--space-4);
}

.wizard-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.wizard-description {
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.wizard-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
}

/* Pulse animation for CTAs */
.pulse-once {
  animation: pulseOnce 2s ease-out;
}

@keyframes pulseOnce {
  0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
  50% { box-shadow: 0 0 0 8px rgba(59, 130, 246, 0.2); }
}

/* Skip link */
.skip-link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-decoration: underline;
  cursor: pointer;
}

.skip-link:hover {
  color: var(--text-secondary);
}

/* ============================================
   FILE UPLOAD DROPZONE
   ============================================ */

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--pop-primary);
  background: rgba(59, 130, 246, 0.05);
}

.dropzone-icon {
  width: 48px;
  height: 48px;
  stroke: var(--text-muted);
  stroke-width: 1.5;
  margin-bottom: var(--space-4);
}

.dropzone-text {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.dropzone-hint {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ============================================
   AVATAR
   ============================================ */

.avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.avatar-sm { width: 32px; height: 32px; font-size: var(--text-xs); }
.avatar-lg { width: 56px; height: 56px; font-size: var(--text-lg); }

/* ============================================
   CHAT-SPECIFIC STYLES
   ============================================ */

.chat-layout {
  display: flex;
  height: calc(100vh - 65px);
}

.chat-sidebar {
  width: 240px;
  border-right: 1px solid var(--border-color);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

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

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
}

.chat-input-container {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

.chat-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  resize: none;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--text-primary);
  line-height: 1.5;
  max-height: 150px;
}

.chat-input:focus {
  outline: none;
}

.chat-input::placeholder {
  color: var(--text-muted);
}

.message {
  margin-bottom: var(--space-4);
  max-width: 80%;
}

.message-user {
  margin-left: auto;
}

.message-content {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
}

.message-user .message-content {
  background: var(--bg-tertiary);
}

.message-meta {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

/* Persona list in sidebar */
.persona-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
}

.persona-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.persona-item:hover,
.persona-item.active {
  background: var(--bg-tertiary);
}

.persona-item.active {
  border-left: 2px solid var(--pop-primary);
}

.persona-name {
  font-weight: var(--font-normal);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

.persona-category {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ============================================
   ART DECO FLOURISHES
   Subtle geometric accents inspired by 1920s design
   ============================================ */

/* Decorative corner accents for cards */
.card-deco {
  position: relative;
}

.card-deco::before,
.card-deco::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  border-style: solid;
  border-color: var(--border-color);
  pointer-events: none;
  transition: border-color var(--transition-fast);
}

.card-deco::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.card-deco::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}

.card-deco:hover::before,
.card-deco:hover::after {
  border-color: var(--text-primary);
}

/* Chevron divider - art deco inspired */
.divider-deco {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--text-muted);
}

.divider-deco::before,
.divider-deco::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.divider-deco-icon {
  width: 16px;
  height: 16px;
  stroke-width: 1;
}

/* Geometric section header */
.section-header-deco {
  position: relative;
  display: inline-block;
  padding-bottom: var(--space-3);
}

.section-header-deco::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--text-primary);
}

/* Sunburst accent (radial lines) */
.accent-sunburst {
  position: relative;
  overflow: hidden;
}

.accent-sunburst::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  width: 200%;
  height: 200%;
  background: repeating-conic-gradient(
    from 0deg,
    transparent 0deg 8deg,
    var(--border-subtle) 8deg 9deg
  );
  transform: translateX(-50%);
  opacity: 0.3;
  pointer-events: none;
}

/* Thin line frame for featured content */
.frame-thin {
  position: relative;
  padding: var(--space-6);
}

.frame-thin::before {
  content: '';
  position: absolute;
  inset: var(--space-2);
  border: 1px solid var(--border-subtle);
  pointer-events: none;
}

/* Stepped corner accent */
.corner-stepped {
  position: relative;
}

.corner-stepped::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 32px;
  height: 32px;
  background:
    linear-gradient(135deg,
      transparent 50%,
      var(--border-color) 50%,
      var(--border-color) 52%,
      transparent 52%
    ),
    linear-gradient(135deg,
      transparent 60%,
      var(--border-color) 60%,
      var(--border-color) 62%,
      transparent 62%
    ),
    linear-gradient(135deg,
      transparent 70%,
      var(--border-color) 70%,
      var(--border-color) 72%,
      transparent 72%
    );
  pointer-events: none;
}

/* Horizontal line with diamond center */
.divider-diamond {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--space-8) 0;
}

.divider-diamond::before,
.divider-diamond::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.divider-diamond-center {
  width: 8px;
  height: 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  transform: rotate(45deg);
  margin: 0 var(--space-4);
}

/* Elegant underline for titles */
.title-underline {
  position: relative;
  display: inline-block;
}

.title-underline::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    var(--text-primary) 0%,
    var(--text-primary) 30%,
    transparent 100%
  );
}

/* Thin bracket accents */
.bracket-accent {
  position: relative;
  padding: 0 var(--space-4);
}

.bracket-accent::before,
.bracket-accent::after {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--text-2xl);
  font-weight: var(--font-light);
  color: var(--border-color);
  line-height: 1;
}

.bracket-accent::before {
  content: '[';
  left: 0;
}

.bracket-accent::after {
  content: ']';
  right: 0;
}

/* Geometric pattern background */
.pattern-geo {
  background-image:
    linear-gradient(45deg, var(--border-subtle) 25%, transparent 25%),
    linear-gradient(-45deg, var(--border-subtle) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--border-subtle) 75%),
    linear-gradient(-45deg, transparent 75%, var(--border-subtle) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

/* Minimal stat card with line accent */
.stat-card-minimal {
  position: relative;
  padding: var(--space-4);
  border-left: 2px solid var(--text-primary);
}

.stat-card-minimal .stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-light);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.stat-card-minimal .stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Thin line icon container */
.icon-thin {
  stroke-width: 1 !important;
}

/* Letter-spaced labels */
.label-spaced {
  font-size: var(--text-xs);
  font-weight: var(--font-normal);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}

/* Hero text styling */
.hero-text {
  font-size: var(--text-3xl);
  font-weight: var(--font-light);
  letter-spacing: 0.04em;
  line-height: 1.2;
}

/* Elegant button variant */
.btn-elegant {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--text-primary);
  font-weight: var(--font-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-3) var(--space-6);
}

.btn-elegant:hover:not(:disabled) {
  background: var(--text-primary);
  color: var(--text-inverse);
}

/* Thin separator line */
.separator-thin {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-6) 0;
}

/* Angular quote block */
.quote-angular {
  position: relative;
  padding: var(--space-4) var(--space-6);
  font-style: italic;
  color: var(--text-secondary);
}

.quote-angular::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(
    to bottom,
    var(--text-primary) 0%,
    var(--text-primary) 20%,
    transparent 20%,
    transparent 80%,
    var(--text-primary) 80%,
    var(--text-primary) 100%
  );
}

/* ============================================
   SETTING & MEMORY TABS
   ============================================ */

.tabs-container {
  margin-top: var(--space-4);
}

.tab-nav {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-4);
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: -1px;
}

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

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

.tab-content {
  display: none;
}

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

/* Entry list for facts, key facts, etc. */
.entry-list {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  max-height: 300px;
  overflow-y: auto;
}

.entry-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-fast);
}

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

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

.entry-info {
  flex: 1;
  min-width: 0;
}

.entry-name {
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.entry-actions {
  display: flex;
  gap: var(--space-1);
  flex-shrink: 0;
}

/* Small icon button */
.btn-icon-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-icon-sm.danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--pop-danger);
  border-color: var(--pop-danger);
}

/* Keyword tag */
.keyword-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

/* Memory section */
.memory-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

/* Small form input */
.form-input-sm {
  padding: var(--space-2);
  font-size: var(--text-sm);
  min-height: auto;
}

/* Collapsible sections */
.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  cursor: pointer;
  user-select: none;
}

.collapsible-header:hover {
  background: var(--bg-secondary);
}

.collapsible-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.collapsible-header.collapsed .collapsible-icon {
  transform: rotate(-90deg);
}

.collapsible-content {
  padding: 0 var(--space-4) var(--space-4);
}

.collapsible-content.collapsed {
  display: none;
}

/* Form card */
.form-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  overflow: hidden;
}

.form-section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-subtle);
}

/* Form row for side-by-side inputs */
.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .tab-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }

  .entry-item {
    flex-wrap: wrap;
  }

  .entry-actions {
    width: 100%;
    justify-content: flex-end;
    margin-top: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-subtle);
  }

  /* Dashboard grid stacking on mobile */
  .dashboard-grid {
    grid-template-columns: 1fr !important;
  }

  /* Action grid wrapping */
  .action-grid {
    gap: var(--space-2);
  }

  .action-btn {
    flex: 1 1 calc(50% - var(--space-2));
    min-width: 140px;
    justify-content: center;
    padding: var(--space-3);
    font-size: var(--text-xs);
  }

  /* Recent conversations on mobile */
  .recent-item {
    padding: var(--space-3);
  }

  .recent-avatar {
    width: 32px;
    height: 32px;
    font-size: var(--text-xs);
  }

  .recent-title {
    font-size: var(--text-sm);
  }

  .recent-preview {
    font-size: var(--text-xs);
  }

  /* Status section on mobile */
  .status-section {
    padding: var(--space-3) var(--space-4);
  }

  /* Welcome section mobile */
  .welcome-title {
    font-size: var(--text-2xl);
  }

  .welcome-divider {
    display: none; /* Hide decorative divider on mobile */
  }

  /* Form card padding on mobile */
  .form-card {
    padding: var(--space-3);
  }

  /* Avatar upload section mobile */
  .avatar-upload-container {
    flex-direction: column !important;
    align-items: center !important;
    text-align: center;
  }

  .avatar-upload-info {
    text-align: center;
  }
}

/* ============================================
   MOBILE NAVIGATION DRAWER
   ============================================ */

.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-nav-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  max-width: 85vw;
  background: var(--bg-primary);
  z-index: 999;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  min-height: 60px;
}

.mobile-nav-links {
  list-style: none;
  padding: var(--space-4);
  margin: 0;
  flex: 1;
  overflow-y: auto;
}

.mobile-nav-links li {
  margin-bottom: var(--space-1);
}

.mobile-nav-links a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  min-height: 48px; /* Touch-friendly */
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.mobile-nav-links a.active {
  font-weight: var(--font-medium);
}