/* ===== GLOBAL STYLES ===== */

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

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

/* Inactive tab content: block interaction */
.tab-content:not(.active) {
  pointer-events: none;
}

.tab-content.active {
  pointer-events: auto;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  /* Loading spinners: keep a slow continuous rotation (global * rule would freeze them) */
  .spinner,
  .loading-spinner,
  .spin-icon,
  .loading-state .spinner,
  .loading-indicator .spinner,
  .track-empty-state .loading-spinner {
    animation-duration: 1s !important;
    animation-iteration-count: infinite !important;
    animation-timing-function: linear !important;
    animation-name: spin !important;
  }

  /* Home reveal overlay: JS-driven mask animation must not be snapped to 0.01ms */
  .home-reveal-overlay {
    transition: none !important;
    transition-property: none !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  position: relative;
}

/* Text selection */
::selection {
  background: var(--color-primary);
  color: white;
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Scroll margin so focused/anchor targets aren't hidden under fixed UI */
:target,
[id]:focus {
  scroll-margin-top: var(--spacing-2xl);
}

/* App title (h1) – compact so nav remains primary */
.app-title {
  margin: 0 0 0.25rem;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

/* Utility: explicit no-shadow where needed */
.shadow-none {
  box-shadow: var(--shadow-none);
}

/* Custom scrollbar */
::-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);
  transition: background var(--transition-fast);
}

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

/* Scrollbar corner (bottom-right when both scrollbars visible) - match page background */
::-webkit-scrollbar-corner {
  background: var(--bg-primary);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-primary) var(--bg-secondary);
}

@media (max-width: 768px) {
  body {
    overscroll-behavior-y: contain;
    overscroll-behavior-x: none;
  }

  .tab-content.active,
  .tab-content,
  #analysisOutput,
  .analysis-output-container,
  .analysis-section {
    min-width: 0;
    overflow-x: clip;
    max-width: 100%;
  }

  /* Hide scrollbar on mobile */
  ::-webkit-scrollbar {
    width: 4px;
  }

  button,
  .btn,
  a[role="button"],
  input,
  select,
  [tabindex="0"] {
    touch-action: manipulation;
  }
}

@media (max-width: 480px) {

  /* Safe area for modals so they don’t sit under notches */
  .modal-content {
    padding-left: max(var(--spacing-lg), env(safe-area-inset-left));
    padding-right: max(var(--spacing-lg), env(safe-area-inset-right));
  }
}

/* ===== CONTAINER ===== */
.container {
  max-width: none;
  margin: 0;
  padding: var(--spacing-2xl) var(--spacing-4xl);
  width: 100%;
  min-width: 0;
  overflow-x: visible;
  box-sizing: border-box;
}

@media (max-width: 1200px) {
  .container {
    max-width: 100%;
    padding: 0 var(--spacing-2xl);
    margin: var(--spacing-lg) auto var(--spacing-7xl);
  }
}

@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-xl);
    margin: var(--spacing-lg) auto var(--spacing-6xl);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-xl);
    margin: var(--spacing-lg) auto var(--spacing-5xl);
  }

  /* Prevent horizontal scroll on content; avoid constraining buttons/inputs */
  .container>*,
  .tab-content,
  .top-controls-card,
  #results {
    max-width: none;
  }

  img {
    max-width: 100%;
    height: auto;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 max(var(--spacing-lg), env(safe-area-inset-right)) 0 max(var(--spacing-lg), env(safe-area-inset-left));
    margin: var(--spacing-lg) auto max(var(--spacing-4xl), env(safe-area-inset-bottom));
    margin-top: var(--spacing-lg);
  }
}

@media (max-width: 360px) {
  .container {
    padding: 0 max(var(--spacing-md), env(safe-area-inset-right)) 0 max(var(--spacing-md), env(safe-area-inset-left));
    margin: var(--spacing-lg) auto max(var(--spacing-3xl), env(safe-area-inset-bottom));
  }
}

/* ===== TYPOGRAPHY ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-3xl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  margin: 0 0 1em;
  line-height: var(--line-height-relaxed);
}

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

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

/* ===== SKELETON LOADER ===== */
.skeleton {
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  animation: skeletonPulse 2s ease-in-out infinite;
}

@keyframes skeletonPulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.85;
  }
}

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

.skeleton .thumb {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  height: 170px;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  animation: skeletonShimmer 2s ease-in-out infinite;
}

.skeleton-line {
  height: 12px;
  margin: var(--spacing-md) 0;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 2s ease-in-out infinite;
}

.skeleton-line.title {
  width: 80%;
  height: 16px;
  margin-bottom: var(--spacing-md);
}

.skeleton-line.meta {
  width: 60%;
}

.skeleton-line.badge {
  width: 40%;
  height: 14px;
  margin-top: 10px;
}

/* ===== SEARCH SKELETON CARDS (grid items matching video cards) ===== */
.skeleton-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  overflow: hidden;
  animation: skeletonPulse 2s ease-in-out infinite;
  min-width: min(100%, 280px);
  max-width: min(100%, 320px);
  align-self: start;
}

.skeleton-card-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  min-height: 0;
  flex-shrink: 0;
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 2s ease-in-out infinite;
}

.skeleton-card-info {
  padding: var(--spacing-lg) var(--spacing-2xl) var(--spacing-lg) var(--spacing-4xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.skeleton-card-info .skeleton-line {
  margin: 0;
}

.skeleton-card-info .skeleton-line.title {
  width: 85%;
  height: 14px;
  margin-bottom: var(--spacing-sm);
}

.skeleton-card-info .skeleton-line.meta {
  width: 65%;
  height: 10px;
}

.skeleton-card-info .skeleton-line.badge {
  width: 45%;
  height: 12px;
  margin-top: var(--spacing-sm);
}

/* ===== LUCIDE ICON SYSTEM ===== */
i[data-lucide] {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

[data-lucide] svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  color: currentColor;
  stroke: currentColor;
  fill: none;
}

.sub-tab-btn i[data-lucide],
.btn i[data-lucide],
.tab-actions .btn i[data-lucide],
button i[data-lucide] {
  width: 14px;
  height: 14px;
  vertical-align: -2px;
  margin: 0;
  stroke-width: 2;
  flex-shrink: 0;
}

.btn-enhanced .btn-icon i[data-lucide] {
  width: 16px;
  height: 16px;
  vertical-align: -2px;
  margin-right: 0;
  stroke-width: 2;
}

.chart-toggle i[data-lucide] {
  width: 16px;
  height: 16px;
  vertical-align: -2px;
  margin: 0;
  stroke-width: 2;
}

.insight-icon i[data-lucide] {
  width: 18px;
  height: 18px;
  vertical-align: -3px;
  margin-right: 8px;
  stroke-width: 1.75;
}

.stat-icon i[data-lucide] {
  width: 24px;
  height: 24px;
  stroke-width: 1.5;
}

.empty-icon i[data-lucide] {
  width: 48px;
  height: 48px;
  stroke-width: 1.5;
  color: var(--color-primary);
}

.channel-stat-icon i[data-lucide],
.overview-stat-icon i[data-lucide] {
  width: 20px;
  height: 20px;
  stroke-width: 1.75;
  color: var(--color-primary);
}

.save-star i[data-lucide] {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

.save-option i[data-lucide] {
  width: 16px;
  height: 16px;
  vertical-align: -2px;
  margin-right: 8px;
  stroke-width: 2;
}

.trend-icon i[data-lucide],
.analysis-icon i[data-lucide] {
  width: 20px;
  height: 20px;
  vertical-align: -3px;
  margin-right: 8px;
  stroke-width: 1.75;
}

.table-icon i[data-lucide],
.list-icon i[data-lucide] {
  width: 16px;
  height: 16px;
  vertical-align: -2px;
  margin-right: 6px;
  stroke-width: 2;
}

.notification i[data-lucide] {
  width: 18px;
  height: 18px;
  vertical-align: -3px;
  margin-right: 10px;
  stroke-width: 2;
}

.sub-tab-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button:has(i[data-lucide]),
.btn:has(i[data-lucide]) {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  justify-content: flex-start;
}

button:has(i[data-lucide]) i[data-lucide],
.btn:has(i[data-lucide]) i[data-lucide],
button:has(svg) svg,
.btn:has(svg) svg {
  order: -1;
  margin: 0;
  display: block;
}

/* Icon color variants */
i[data-lucide].icon-primary {
  color: var(--color-primary);
}

i[data-lucide].icon-success {
  color: var(--color-accent-green);
}

i[data-lucide].icon-warning {
  color: var(--color-accent-orange);
}

i[data-lucide].icon-danger {
  color: var(--color-accent-red);
}

i[data-lucide].icon-muted {
  color: var(--color-text-secondary);
}

/* ===== UTILITY CLASSES ===== */
.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;
}

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

.fade-in {
  animation: fadeIn 0.3s var(--ease-out) forwards;
}

/* fadeIn keyframes defined in animations.css */