:root {
  --color-brand-50: #eef2ff;
  --color-brand-100: #e0e7ff;
  --color-brand-200: #c7d2fe;
  --color-brand-300: #a5b4fc;
  --color-brand-400: #818cf8;
  --color-brand-500: #6366f1;
  --color-brand-600: #4f46e5;
  --color-brand-700: #4338ca;
  --color-brand-800: #3730a3;
  --color-brand-900: #312e81;
  --color-surface: #f8fafc;
  --color-ink-DEFAULT: #0f172a;
  --color-ink-muted: #475569;
  --color-border-DEFAULT: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --shadow-elevated: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-panel: 0 1px 3px 0 rgba(0,0,0,0.1), 0 1px 2px -1px rgba(0,0,0,0.1);
  --shadow-card-hover: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --duration-150: 150ms;
  --duration-200: 200ms;
  --duration-300: 300ms;
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --focus-ring-width: 3px;
  --focus-ring-color: #818cf8;
  --focus-ring-offset: 2px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  background-color: var(--color-surface);
  color: var(--color-ink-DEFAULT);
}

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

::-webkit-scrollbar-track {
  background-color: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: #cbd5e1;
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background-color: #94a3b8;
}

::-webkit-scrollbar-corner {
  background-color: transparent;
}

::selection {
  background-color: var(--color-brand-200);
  color: var(--color-ink-DEFAULT);
}

:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  border-radius: 2px;
}

h1, h2, h3, h4, h5, h6, p, span, a, label, li {
  word-wrap: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

img, video, canvas, iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

.hidden {
  display: none !important;
}

/* === Components, Animations & UX Defenses === */

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}
@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(8px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
  0% { opacity: 0; transform: translateY(16px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes scaleBounce {
  0% { transform: scale(0.95); opacity: 0; }
  60% { transform: scale(1.02); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes pulseSoft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
@keyframes spinSlow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
@keyframes slideDown {
  0% { opacity: 0; transform: translateY(-8px); }
  100% { opacity: 1; transform: translateY(0); }
}
.glass {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.glass-strong {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
.glow-brand {
  box-shadow: 0 0 18px rgba(99,102,241,0.5);
}
.glow-success {
  box-shadow: 0 0 18px rgba(34,197,94,0.5);
}
.gradient-brand {
  background-image: linear-gradient(135deg, var(--color-brand-600), var(--color-brand-400));
}
.skeleton {
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}
button,
[role="button"],
a {
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
button:active,
[role="button"]:active,
a:active {
  transform: scale(0.97);
}
button:focus-visible,
[role="button"]:focus-visible,
a:focus-visible {
  outline: 2px solid var(--focus-ring-color);
  outline-offset: 2px;
}
input[type="search"]:focus {
  box-shadow: 0 0 0 3px rgba(99,102,241,0.3);
}
.char-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.char-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-card-hover);
}
.char-card:active {
  transform: scale(0.96);
}
.char-card.active {
  position: relative;
}
.char-card.active::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: 0 0 0 2px var(--color-brand-500);
  pointer-events: none;
}
.category-tag {
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}
.category-tag:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.category-tag:active {
  transform: scale(0.95);
}
.overlay-backdrop,
.modal-overlay,
.drawer-overlay {
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.overlay-backdrop.active,
.modal-overlay.active,
.drawer-overlay.active {
  pointer-events: auto;
  opacity: 1;
}
.overlay-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 40;
}
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.7);
  z-index: 44;
}
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
}
[aria-hidden="true"]:not(.toast-container *):not(.modal-active *) {
  pointer-events: none !important;
}
.z-content {
  z-index: 1;
}
.z-dropdown {
  z-index: 35;
}
.z-sticky {
  z-index: 20;
}
.z-overlay {
  z-index: 40;
}
.z-modal {
  z-index: 45;
}
.z-toast {
  z-index: 9999;
}
.dark {
  --color-surface: #0f172a;
  --color-ink-DEFAULT: #f1f5f9;
  --color-ink-muted: #94a3b8;
  --color-border-DEFAULT: #334155;
  --color-border-strong: #475569;
  --shadow-elevated: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.4);
  --shadow-panel: 0 1px 3px 0 rgba(0,0,0,0.4), 0 1px 2px -1px rgba(0,0,0,0.4);
  --shadow-card-hover: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -4px rgba(0,0,0,0.4);
}
.dark .bg-white {
  background-color: #1e293b;
}
.dark .bg-surface {
  background-color: var(--color-surface);
}
.dark .bg-slate-800 {
  background-color: #0f172a;
}
.dark .border-slate-200,
.dark .border-slate-100 {
  border-color: var(--color-border-DEFAULT);
}
.dark .border-slate-600 {
  border-color: var(--color-border-strong);
}
.dark .text-ink-DEFAULT {
  color: var(--color-ink-DEFAULT);
}
.dark .text-ink-muted {
  color: var(--color-ink-muted);
}
.dark .shadow-panel {
  box-shadow: var(--shadow-panel);
}
.dark .shadow-elevated {
  box-shadow: var(--shadow-elevated);
}
.dark #topbar-header {
  background-color: #0f172a;
  border-color: #1e293b;
}
.dark #topbar-search-input {
  background-color: #1e293b;
  border-color: var(--color-border-strong);
  color: #f1f5f9;
}
.dark #topbar-search-input::placeholder {
  color: #94a3b8;
}
.dark #sidebar-chardb {
  background-color: #1e293b;
  border-color: var(--color-border-DEFAULT);
}
.dark #sidebar-header {
  border-color: var(--color-border-DEFAULT);
}
.dark #sidebar-count-badge {
  background-color: #334155;
  color: var(--color-ink-muted);
}
.dark .category-tag {
  background-color: #1e293b;
  color: #94a3b8;
  border-color: var(--color-border-DEFAULT);
}
.dark .category-tag.active {
  background-color: var(--color-brand-600);
  color: white;
  border-color: var(--color-brand-600);
}
.dark .char-card {
  background-color: #334155;
  border-color: var(--color-border-strong);
}
.dark .char-card:hover {
  background-color: #475569;
}
.dark .char-card.active {
  background-color: rgba(99,102,241,0.15);
  border-color: var(--color-brand-500);
}
.dark .btn-clear-canvas,
.dark .btn-toggle-grid {
  background-color: #334155;
  border-color: var(--color-border-strong);
  color: #cbd5e1;
}
.dark .btn-clear-canvas:hover,
.dark .btn-toggle-grid:hover {
  background-color: #475569;
  color: #f1f5f9;
}
.dark .glass {
  background: rgba(30,41,59,0.7);
}
.dark .glass-strong {
  background: rgba(30,41,59,0.85);
}
.dark .skeleton {
  background: linear-gradient(90deg, #1e293b 25%, #334155 50%, #1e293b 75%);
  background-size: 200% 100%;
}
.dark .overlay-backdrop {
  background: rgba(0,0,0,0.6);
}