/* === CSS RESET & BASE STYLES === */

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

html {
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
  font-size: 100%;
  /* Base for rem units */
}

body {

  font-family: 'Inter var', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  overflow-x: hidden;

  background-color: var(--bg-app);
  color: var(--text-primary);

  line-height: 1.6;
  font-size: 0.9375rem;
  /* 15px base */

  transition: background-color var(--transition-base), color var(--transition-base);

}

@supports (font-variation-settings: normal) {
  body {
    font-family: 'Inter var', sans-serif;
  }
}

/* === THEME VARIABLES === */

:root {

  --font-sans: 'Inter var', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;

  --radius-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);

  --shadow-sm: 0 2px 4px -1px rgba(0, 0, 0, 0.06), 0 1px 2px -1px rgba(0, 0, 0, 0.04);

  --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.06);

  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);

  --transition-fast: 100ms;
  --transition-short: 200ms;
  --transition-base: 300ms;
  --transition-long: 500ms;

  --sidebar-width: 280px;
  --sidebar-width-collapsed: 72px;
  /* Multiple of 4 for spacing */

  --header-height: 64px;

  /* Semantic Colors (Base for light/dark) */

  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  --green-500: #22c55e;
  --green-600: #16a34a;

  --yellow-500: #f59e0b;
  --yellow-600: #d97706;

  --red-500: #ef4444;
  --red-600: #dc2626;

  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;

  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;

  --slate-800: #1e293b;
  --slate-900: #0f172a;

}

html[data-theme="light"] {

  --bg-app: var(--slate-100);

  --bg-primary: #ffffff;

  --bg-secondary: var(--slate-50);

  --bg-tertiary: var(--slate-200);

  --text-primary: var(--slate-800);

  --text-secondary: var(--slate-600);

  --text-muted: var(--slate-400);

  --border-primary: var(--slate-300);

  --border-secondary: var(--slate-200);

  --accent-color: var(--blue-600);

  --accent-color-hover: var(--blue-700);

  --accent-text-interactive: #ffffff;

  --success-color: var(--green-600);
  --success-text: #fff;

  --warning-color: var(--yellow-500);
  --warning-text: var(--slate-800);

  --error-color: var(--red-600);
  --error-text: #fff;

  --info-color: #0ea5e9;
  --info-text: #fff;
  /* Sky Blue */

  --secondary-action-text: var(--slate-700);

  color-scheme: light;

}

html[data-theme="dark"] {

  --bg-app: var(--slate-900);

  --bg-primary: var(--slate-800);

  --bg-secondary: #293548;
  /* Slightly lighter than slate-800 for subtle depth */

  --bg-tertiary: var(--slate-700);

  --text-primary: var(--slate-100);

  --text-secondary: var(--slate-300);

  --text-muted: var(--slate-500);

  --border-primary: var(--slate-600);

  --border-secondary: var(--slate-700);

  --accent-color: var(--blue-500);

  --accent-color-hover: var(--blue-600);

  --accent-text-interactive: #ffffff;

  --success-color: var(--green-500);
  --success-text: var(--slate-900);

  --warning-color: var(--yellow-500);
  --warning-text: var(--slate-900);

  --error-color: var(--red-500);
  --error-text: #fff;

  --info-color: #38bdf8;
  --info-text: var(--slate-900);
  /* Lighter Sky Blue */

  --secondary-action-text: var(--slate-200);

  color-scheme: dark;

}

/* === APP SHELL & SCROLLBARS === */

.app-shell {
  display: flex;
  min-height: 100vh;
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-primary);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
}

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

/* === SIDEBAR === */

.app-sidebar {

  width: var(--sidebar-width);
  background-color: var(--bg-primary);

  border-right: 1px solid var(--border-primary);

  display: flex;
  flex-direction: column;
  padding: 0;

  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;

  transition: width var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1), transform var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);

  overflow-y: auto;
  overflow-x: hidden;
  box-shadow: var(--shadow-md);

}

.app-sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
}

.app-sidebar.collapsed .sidebar-header {
  padding: 0.875rem 0.5rem;
  /* 14px 8px */
}

.sidebar-header {

  padding: 0.875rem 1rem;
  /* 14px 16px */
  margin-bottom: 0.5rem;

  display: flex;
  align-items: center;
  justify-content: space-between;

  border-bottom: 1px solid var(--border-secondary);
  flex-shrink: 0;

  height: var(--header-height);
  /* Match page header */

}

.sidebar-header .logo-title {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  overflow: hidden;
}

.sidebar-header .logo-icon svg {
  width: 2rem;
  height: 2rem;
  fill: var(--accent-color);
  flex-shrink: 0;
}

.app-sidebar.collapsed .sidebar-header .logo-icon svg {
  margin: 0 auto;
}

.sidebar-title {

  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);

  opacity: 1;
  transition: opacity var(--transition-short) ease var(--transition-fast);
  white-space: nowrap;

}

.app-sidebar.collapsed .sidebar-title {
  opacity: 0;
  width: 0;
  display: none;
}

.sidebar-toggle-btn {

  background: transparent;
  border: none;
  color: var(--text-secondary);

  padding: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;

  border-radius: var(--radius-md);
  transition: background-color var(--transition-short), color var(--transition-short);
  flex-shrink: 0;

}

.sidebar-toggle-btn:hover {
  background-color: var(--bg-secondary);
  color: var(--accent-color);
}

.sidebar-toggle-btn .toggle-icon {
  width: 1.25rem;
  height: 1.25rem;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

.app-sidebar.collapsed .sidebar-toggle-btn #desktopToggleIconOpen {
  display: none;
}

.app-sidebar.collapsed .sidebar-toggle-btn #desktopToggleIconClosed {
  display: block;
}

.app-sidebar:not(.collapsed) .sidebar-toggle-btn #desktopToggleIconOpen {
  display: block;
}

.app-sidebar:not(.collapsed) .sidebar-toggle-btn #desktopToggleIconClosed {
  display: none;
}

.sidebar-nav {
  flex-grow: 1;
  overflow-y: auto;
  padding: 0.5rem 0;
}

.nav-list {
  list-style: none;
}

.nav-item .nav-link {

  display: flex;
  align-items: center;
  padding: 0.625rem 1rem;
  /* 10px 16px */

  color: var(--text-secondary);
  text-decoration: none;

  border-radius: var(--radius-md);
  margin: 0.125rem 0.625rem;
  /* 2px 10px */

  font-weight: 500;
  font-size: 0.875rem;
  /* 14px */

  transition: background-color var(--transition-short), color var(--transition-short), box-shadow var(--transition-short), transform var(--transition-fast);

  white-space: nowrap;
  overflow: hidden;
  position: relative;

}

.nav-item .nav-link .link-icon {

  flex-shrink: 0;
  width: 1.125rem;
  height: 1.125rem;
  /* 18px */
  margin-right: 0.75rem;

  stroke-width: 2;
  fill: none;
  stroke: currentColor;
  transition: margin-right var(--transition-base) ease-in-out;

}

.nav-item .nav-link .link-text {
  opacity: 1;
  transition: opacity var(--transition-short) ease;
}

.app-sidebar.collapsed .nav-item .nav-link {
  padding: 0.75rem;
  justify-content: center;
}

.app-sidebar.collapsed .nav-item .nav-link .link-icon {
  margin-right: 0;
}

.app-sidebar.collapsed .nav-item .nav-link .link-text {
  opacity: 0;
  display: none;
}

.nav-item .nav-link:hover {
  background-color: var(--bg-secondary);
  color: var(--accent-color);
  transform: translateX(2px);
}

.nav-item .nav-link.active {

  background-color: var(--accent-color);
  color: var(--accent-text-interactive);

  font-weight: 600;
  box-shadow: var(--shadow-sm);

}

.nav-item .nav-link.active::before {
  /* Active indicator */

  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 3px;

  background-color: var(--accent-text-interactive);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;

}

.app-sidebar.collapsed .nav-item .nav-link.active::before {
  display: none;
}

.nav-item .nav-link.active .link-icon {
  stroke: var(--accent-text-interactive);
}

.sidebar-controls {

  padding: 0.75rem;
  border-top: 1px solid var(--border-secondary);

  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-shrink: 0;

}

.sidebar-controls .icon-btn {

  width: 100%;
  justify-content: flex-start;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;

  background-color: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);

  transition: background-color var(--transition-short), color var(--transition-short), border-color var(--transition-short);

  display: flex;
  align-items: center;
  gap: 0.625rem;
  border-radius: var(--radius-md);
  cursor: pointer;

}

.sidebar-controls .icon-btn:hover {
  background-color: var(--bg-secondary);
  color: var(--accent-color);
}

.sidebar-controls .icon-btn .toggle-icon,
.sidebar-controls .icon-btn svg:not(.toggle-icon) {

  width: 1.125rem;
  height: 1.125rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  flex-shrink: 0;

}

.app-sidebar.collapsed .sidebar-controls .icon-btn {
  padding: 0.75rem;
  justify-content: center;
}

.app-sidebar.collapsed .sidebar-controls .icon-btn .btn-text {
  display: none;
}

/* === CONTENT WRAPPER & HEADER === */

.app-content-wrapper {

  margin-left: var(--sidebar-width);
  flex-grow: 1;
  display: flex;
  flex-direction: column;

  transition: margin-left var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);

}

.app-sidebar.collapsed~.app-content-wrapper {
  margin-left: var(--sidebar-width-collapsed);
}

.page-header {

  background-color: var(--bg-primary);
  padding: 0 1.5rem;

  display: flex;
  justify-content: space-between;
  align-items: center;

  border-bottom: 1px solid var(--border-primary);

  position: sticky;
  top: 0;
  z-index: 900;
  height: var(--header-height);
  flex-shrink: 0;

  box-shadow: var(--shadow-sm);

}

.page-header-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.mobile-sidebar-toggle {
  display: none;
}

/* === MAIN CONTENT & SECTIONS === */

.app-main-content {
  flex-grow: 1;
  padding: 1.5rem;
  max-width: 100%;
}

.global-disclaimer {

  background-color: color-mix(in srgb, var(--warning-color) 10%, var(--bg-primary));

  color: var(--text-primary);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);

  margin-bottom: 1.75rem;
  border-left: 4px solid var(--warning-color);
  font-size: 0.875rem;

  box-shadow: var(--shadow-sm);

}

html[data-theme="dark"] .global-disclaimer {
  background-color: color-mix(in srgb, var(--warning-color) 20%, var(--bg-primary));
}

.global-disclaimer strong {
  font-weight: 600;
  color: var(--warning-color);
}

.content-panel {
  display: none;
  animation: fadeInContent 0.5s cubic-bezier(0.4, 0, 0.2, 1) .05s;
  animation-fill-mode: backwards;
}

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

@keyframes fadeInContent {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.content-section-header {

  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);

  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.625rem;

  border-bottom: 1px solid var(--border-secondary);

  display: flex;
  justify-content: space-between;
  align-items: center;

}

.content-section-header:first-of-type {
  margin-top: 0;
}

.content-section-header h3 {
  font-size: inherit;
  font-weight: inherit;
}

/* If using h3 inside */

/* === CARDS === */

.info-grid {

  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));

  gap: 1.25rem;
  margin-bottom: 1.5rem;

}

.multi-screen-details-grid {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr));
}

.permissions-grid {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
}

.resource-summary-grid {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
}

.info-card {

  background-color: var(--bg-primary);
  padding: 1.25rem;
  border-radius: var(--radius-lg);

  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-secondary);

  transition: background-color var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-short);

  display: flex;
  flex-direction: column;

}

.info-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--accent-color);
}

.info-card.full-span {
  grid-column: 1 / -1;
}

.info-card.placeholder-card {
  align-items: center;
  justify-content: center;
  min-height: 100px;
  color: var(--text-muted);
  border-style: dashed;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.625rem;
}

.card-label-header {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* For headers inside cards */

.card-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.375rem;
}

.card-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-word;
  flex-grow: 1;
  line-height: 1.4;
}

.card-value-small {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.card-value.code-text,
.list-like-code-text {

  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background-color: var(--bg-secondary);

  padding: 0.75rem;
  border-radius: var(--radius-md);
  max-height: 250px;
  overflow-y: auto;

  white-space: pre-wrap;
  word-break: break-all;
  border: 1px solid var(--border-secondary);
  margin-top: 0.5rem;

  box-shadow: var(--shadow-inset);

}

.card-description {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  line-height: 1.5;
}

.info-card.text-only-card .card-value {
  font-weight: normal;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.value-success {
  color: var(--success-color) !important;
}

.value-warning {
  color: var(--warning-color) !important;
}

.value-error {
  color: var(--error-color) !important;
}

.value-info {
  color: var(--info-color) !important;
}

.value-warning-card {
  border-left: 4px solid var(--warning-color);
  background-color: color-mix(in srgb, var(--warning-color) 5%, var(--bg-primary));
}

html[data-theme="dark"] .value-warning-card {
  background-color: color-mix(in srgb, var(--warning-color) 15%, var(--bg-primary));
}

/* === ACTIONS & INPUTS === */

.action-btn {

  background-color: var(--accent-color);
  color: var(--accent-text-interactive);
  border: none;

  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;

  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.025em;

  transition: background-color var(--transition-short), transform var(--transition-fast), box-shadow var(--transition-short);

  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  box-shadow: var(--shadow-sm);

}

.action-btn:hover {
  background-color: var(--accent-color-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.action-btn:active {
  transform: translateY(0px) scale(0.98);
  box-shadow: var(--shadow-xs);
}

.action-btn:disabled {
  background-color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.7;
  box-shadow: none;
  transform: none;
}

.action-btn-secondary {

  background-color: var(--bg-secondary);
  color: var(--secondary-action-text);

  border: 1px solid var(--border-primary);
  box-shadow: var(--shadow-xs);

}

.action-btn-secondary:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--border-primary);
}

.action-btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

.button-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.pixel-test-color-btn[data-color="black"] {
  background-color: #000;
  color: #fff;
}

.pixel-test-color-btn[data-color="white"] {
  background-color: #fff;
  color: #000;
  border: 1px solid #ccc;
}

.pixel-test-color-btn[data-color="red"] {
  background-color: #f00;
  color: #fff;
}

.pixel-test-color-btn[data-color="green"] {
  background-color: #0f0;
  color: #000;
}

.pixel-test-color-btn[data-color="blue"] {
  background-color: #00f;
  color: #fff;
}

.styled-input,
.styled-select {

  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;

  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);

  border-radius: var(--radius-md);
  color: var(--text-primary);
  margin-top: 0.5rem;

  transition: border-color var(--transition-short), box-shadow var(--transition-short);

}

.styled-input:focus,
.styled-select:focus {

  border-color: var(--accent-color);

  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-color) 20%, transparent);
  outline: none;

}

.styled-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2364748B'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25em;
  padding-right: 2.5rem;
}

html[data-theme="dark"] .styled-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2394A3B8'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
}

/* === SPECIFIC UI ELEMENTS === */

#fpsVisualizer,
#vsyncCanvas,
.visual-test-canvas-small {

  border: 1px solid var(--border-secondary);
  margin-top: 0.75rem;
  border-radius: var(--radius-md);

  background-color: var(--bg-secondary);
  width: 100%;
  display: block;

  box-shadow: var(--shadow-inset);

}

#fpsVisualizer {
  height: 60px;
}

#vsyncCanvas {
  height: 80px;
}

.visual-test-canvas-small {
  height: 100px;
}

.visual-test-area,
.interactive-area {

  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);

  background-color: var(--bg-secondary);
  margin-top: 0.75rem;
  padding: 1rem;

  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;

  overflow: hidden;
  box-shadow: var(--shadow-inset);

}

.placeholder-text,
.list-display-container .placeholder-text {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.875rem;
  text-align: center;
  width: 100%;
  padding: 1rem 0;
}

.progress-bar-container {

  width: 100%;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full);

  margin-top: 0.75rem;
  overflow: hidden;
  height: 0.625rem;
  border: 1px solid var(--border-secondary);

  box-shadow: var(--shadow-inset);

}

.progress-bar {

  width: 0%;
  height: 100%;
  background-color: var(--accent-color);

  transition: width var(--transition-base) ease-out, background-color var(--transition-short);

  border-radius: var(--radius-full);

}

.list-display-container {

  background-color: var(--bg-secondary);
  padding: 0;
  border-radius: var(--radius-md);

  margin-top: 0.75rem;
  border: 1px solid var(--border-secondary);

  max-height: 280px;
  overflow-y: auto;
  box-shadow: var(--shadow-inset);

}

.list-display-container.codec-list .list-item {
  padding: 0.625rem 1rem;
}

.list-display-container.storage-list .list-item strong {
  display: inline-block;
  min-width: 120px;
}

.list-item {

  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border-primary);
  font-size: 0.8125rem;
  word-break: break-word;

}

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

.list-item strong {
  font-weight: 500;
  color: var(--text-primary);
}

.list-item code {
  font-family: var(--font-mono);
  background-color: var(--bg-tertiary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

.list-item .status-dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  margin-right: 0.375rem;
  vertical-align: middle;
}

.status-dot.neutral {
  background-color: var(--text-muted);
}

.status-dot.success {
  background-color: var(--success-color);
}

.status-dot.warning {
  background-color: var(--warning-color);
}

.status-dot.error {
  background-color: var(--error-color);
}

.status-dot.info {
  background-color: var(--info-color);
}

.badge {

  display: inline-block;
  padding: .25em .5em;
  font-size: .7em;
  font-weight: 600;
  line-height: 1;

  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: var(--radius-sm);

  text-transform: uppercase;
  letter-spacing: 0.05em;

}

.badge.success {
  background-color: var(--success-color);
  color: var(--success-text);
}

.badge.info {
  background-color: var(--info-color);
  color: var(--info-text);
}

.badge.warning {
  background-color: var(--warning-color);
  color: var(--warning-text);
}

.badge.error {
  background-color: var(--error-color);
  color: var(--error-text);
}

.badge.secondary {
  background-color: var(--slate-500);
  color: var(--slate-50);
}

html[data-theme="dark"] .badge.secondary {
  background-color: var(--slate-600);
  color: var(--slate-200);
}

.small-text {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* === FOOTER === */

.app-main-footer {

  text-align: center;
  padding: 1.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);

  border-top: 1px solid var(--border-primary);
  margin-top: 2.5rem;

  background-color: var(--bg-primary);
  flex-shrink: 0;

}

/* === TOOLTIP === */

#tooltip {

  position: fixed;
  background-color: color-mix(in srgb, var(--slate-800) 95%, transparent);

  color: var(--slate-100);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);

  font-size: 0.8125rem;
  z-index: 10001;
  pointer-events: none;
  opacity: 0;

  transition: opacity var(--transition-short) ease-out, transform var(--transition-short) ease-out;

  transform: translateY(6px) scale(0.95);
  box-shadow: var(--shadow-lg);
  max-width: 320px;

  line-height: 1.5;

}

html[data-theme="dark"] #tooltip {
  background-color: color-mix(in srgb, var(--slate-200) 95%, transparent);
  color: var(--slate-800);
}

#tooltip.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* === RESPONSIVE ADJUSTMENTS === */

@media (max-width: 992px) {

  .app-sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-xl);
  }

  .app-sidebar.open {
    transform: translateX(0);
    width: var(--sidebar-width);
  }

  .app-sidebar.collapsed {
    transform: translateX(-100%);
  }

  .app-content-wrapper {
    margin-left: 0 !important;
  }

  .mobile-sidebar-toggle {

    display: inline-flex;
    background: none;
    border: none;
    color: var(--text-secondary);

    padding: 0.5rem;
    cursor: pointer;
    transition: color var(--transition-short);

  }

  .mobile-sidebar-toggle:hover {
    color: var(--accent-color);
  }

  .mobile-sidebar-toggle svg {
    width: 1.5rem;
    height: 1.5rem;
    fill: currentColor;
  }

  .sidebar-title {
    display: block !important;
    opacity: 1 !important;
  }

  .app-sidebar.open .nav-item .nav-link .link-text,

  .app-sidebar.open .sidebar-controls .icon-btn .btn-text {
    display: inline-block;
    opacity: 1;
  }

  .app-sidebar.open .nav-item .nav-link .link-icon {
    margin-right: 0.75rem;
  }

  .app-sidebar.open .nav-item .nav-link {
    justify-content: flex-start;
  }

  .app-sidebar.open .sidebar-header {
    padding: 0.875rem 1rem;
  }

  .page-header-title {
    font-size: 1.125rem;
  }

  .app-main-content {
    padding: 1.25rem;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

}

/* === CVD SIMULATION & ACCESSIBILITY === */

body.cvd-protanopia {
  filter: url(#protanopia);
}

body.cvd-deuteranopia {
  filter: url(#deuteranopia);
}

body.cvd-tritanopia {
  filter: url(#tritanopia);
}

body.cvd-achromatopsia {
  filter: url(#achromatopsia);
}

/* Ensure filter SVG is hidden */

#cvdFilters {
  position: absolute;
  height: 0;
  width: 0;
}