KVideo/app/globals.css

@import "tailwindcss";
@import "./scroll-optimization.css";

:root {
  --font-family-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;

  /* Light Mode Palette */
  --bg-color-light: #f0f2f5;
  --bg-image-light: linear-gradient(120deg, #fdfbfb 0%, #ebedee 100%);
  --text-color-light: #1d1d1f;
  --text-color-secondary-light: #6e6e73;
  --accent-color-light: #0056b3;
  /* Updated from #007aff for WCAG AA compliance (6.85:1 with white) */
  --glass-bg-light: rgba(242, 242, 247, 0.8);
  --glass-border-light: rgba(255, 255, 255, 0.5);
  --shadow-color-light: rgba(0, 0, 0, 0.1);

  /* Dark Mode Palette */
  --bg-color-dark: #121212;
  --bg-image-dark: linear-gradient(120deg, #272B30 0%, #121212 100%);
  --text-color-dark: #f5f5f7;
  --text-color-secondary-dark: #8e8e93;
  --accent-color-dark: #1A6DBF;
  /* Updated for WCAG AA compliance (5.27:1 with white) */
  --glass-bg-dark: rgba(28, 28, 30, 0.75);
  --glass-border-dark: rgba(60, 60, 60, 0.7);
  --shadow-color-dark: rgba(0, 0, 0, 0.3);

  /* Universal Variables */
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 4px var(--shadow-color);
  --shadow-md: 0 4px 12px var(--shadow-color);
  --transition-fluid: 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);

  /* Active Theme Variables */
  --bg-color: var(--bg-color-light);
  --bg-image: var(--bg-image-light);
  --text-color: var(--text-color-light);
  --text-color-secondary: var(--text-color-secondary-light);
  --accent-color: var(--accent-color-light);
  --glass-bg: var(--glass-bg-light);
  --glass-border: var(--glass-border-light);
  --shadow-color: var(--shadow-color-light);

  --background: #f0f2f5;
  --foreground: #1d1d1f;
}

body {
  --bg-color: var(--bg-color-light);
  --bg-image: var(--bg-image-light);
  --text-color: var(--text-color-light);
  --text-color-secondary: var(--text-color-secondary-light);
  --accent-color: var(--accent-color-light);
  --glass-bg: var(--glass-bg-light);
  --glass-border: var(--glass-border-light);
  --shadow-color: var(--shadow-color-light);

  background-color: var(--bg-color);
  background-image: var(--bg-image);
  color: var(--text-color);
  font-family: var(--font-family-system);

  /* Optimize scrolling performance */
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: none;
}

body.dark,
.dark body {
  --bg-color: var(--bg-color-dark);
  --bg-image: var(--bg-image-dark);
  --text-color: var(--text-color-dark);
  --text-color-secondary: var(--text-color-secondary-dark);
  --accent-color: var(--accent-color-dark);
  --glass-bg: var(--glass-bg-dark);
  --glass-border: var(--glass-border-dark);
  --shadow-color: var(--shadow-color-dark);

  --background: #121212;
  --foreground: #f5f5f7;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  /* Optimize font rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  /* Disable smooth scrolling for better performance - users expect instant scroll */
  scroll-behavior: auto;
}

/* Global focus-visible styles for keyboard navigation accessibility */
*:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: var(--radius-2xl);
}

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

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Special handling for pill-shaped elements */
[class*="rounded-full"]:focus-visible {
  border-radius: var(--radius-full);
}


/* Scrollbar styling */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--glass-bg) 80%, transparent);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--accent-color) 60%, transparent);
  background-clip: padding-box;
}

/* Hide scrollbar utility */
.scrollbar-hide {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.scrollbar-hide::-webkit-scrollbar {
  display: none;
}

/* Custom animations */
@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

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

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

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

@keyframes spin-slow {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes spin-reverse {
  from {
    transform: rotate(360deg);
  }

  to {
    transform: rotate(0deg);
  }
}

@keyframes bounce-subtle {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-5px);
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

@keyframes scale-in {
  0% {
    opacity: 0;
    transform: scale(0.9) translateY(10px);
  }

  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes scale-out {
  0% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }

  100% {
    opacity: 0;
    transform: scale(0.9) translateY(-10px);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) translateX(0);
    opacity: 0.3;
  }

  50% {
    transform: translateY(-20px) translateX(10px);
    opacity: 0.8;
  }
}

@keyframes gradient-x {

  0%,
  100% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }
}

.animate-fade-in {
  animation: fade-in 0.4s ease-out;
}

.animate-slide-up {
  animation: slide-up 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.animate-pulse {
  animation: pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-spin-slow {
  animation: spin-slow 3s linear infinite;
}

.animate-spin-reverse {
  animation: spin-reverse 2s linear infinite;
}

.animate-bounce-subtle {
  animation: bounce-subtle 2s ease-in-out infinite;
}

.animate-shimmer {
  animation: shimmer 2s infinite;
}

.animate-scale-in {
  animation: scale-in 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.animate-scale-out {
  animation: scale-out 0.2s ease-out forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

.animate-gradient-x {
  background-size: 200% 200%;
  animation: gradient-x 3s ease infinite;
}

/* Liquid Glass Components */
.glass-card {
  /* background: var(--glass-bg); */
  /* Performance fix: Use solid color with opacity instead of blur */
  background: var(--bg-color);
  opacity: 0.95;

  /* backdrop-filter: blur(8px) saturate(120%); */
  /* -webkit-backdrop-filter: blur(8px) saturate(120%); */

  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--glass-border);
  transition: transform 0.2s ease-out;
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-color);
}

/* Optimize fixed/sticky elements for scrolling */
nav:where(.sticky, .fixed),
.sticky,
.fixed {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.glass-input {
  background: var(--glass-bg);
  /* Performance fix: Disable blur */
  /* backdrop-filter: blur(6px) saturate(120%); */
  /* -webkit-backdrop-filter: blur(6px) saturate(120%); */
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  color: var(--text-color);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.glass-input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-color) 30%, transparent);
}

.glass-button {
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--radius-2xl);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.glass-button:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
  box-shadow: 0 4px 8px var(--shadow-color);
}

.glass-button:active {
  transform: translateY(0) scale(0.98);
  filter: brightness(0.95);
}

.glass-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--accent-color);
  color: white;
}

/* Animations for History Components */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
  }

  to {
    transform: translateX(0);
  }
}

/* Custom Video Player Styles */
.spinner {
  width: 48px;
  height: 48px;
  border: 5px solid color-mix(in srgb, var(--glass-bg) 50%, transparent);
  border-top-color: var(--accent-color);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-2xl);
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  z-index: 10;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.btn-icon:active {
  transform: scale(0.95);
}

.slider-track {
  position: relative;
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  cursor: pointer;
  overflow: visible;
  user-select: none;
  -webkit-user-select: none;
}

.slider-track.h-1 {
  height: 4px;
}

.slider-range {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background-color: var(--accent-color);
  border-radius: var(--radius-full);
  pointer-events: none;
}

.slider-thumb {
  position: absolute;
  top: 50%;
  width: 16px;
  height: 16px;
  background-color: white;
  border-radius: var(--radius-full);
  transform: translate(-50%, -50%);
  cursor: grab;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  pointer-events: none;
}

.slider-track.h-1 .slider-thumb {
  width: 12px;
  height: 12px;
}

.slider-track:hover .slider-thumb {
  transform: translate(-50%, -50%) scale(1.2);
}

.slider-thumb:active,
.slider-track:active .slider-thumb {
  transform: translate(-50%, -50%) scale(1.3);
  cursor: grabbing;
}

/* Hide scrollbar utility */
.scrollbar-hide {
  -ms-overflow-style: none;
  /* IE and Edge */
  scrollbar-width: none;
  /* Firefox */
}

.scrollbar-hide::-webkit-scrollbar {
  display: none;
  /* Chrome, Safari and Opera */
}

/* Toast slide-up animation */
@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

.animate-slide-up {
  animation: slide-up 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Performance optimizations for scrolling */
/* Apply CSS containment to grid items for better scroll performance */
[class*="grid"]>* {
  content-visibility: auto;
  contain-intrinsic-size: auto 400px;
  contain: layout style paint;
}

/* Smooth video grid transitions */
[class*="grid"]>a {
  animation: fadeInUp 0.2s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

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

/* Reduce paint complexity on scroll */
img {
  content-visibility: auto;
}

/* Disable pointer events during scroll for better performance */
body.scrolling * {
  pointer-events: none !important;
}

/* Force hardware acceleration for specific animated elements */
.group:hover img,
.glass-card,
nav {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

/* Optimize badge rendering */
[class*="badge"],
[class*="Badge"] {
  contain: layout style;
}

/* ===========================================
   SEARCH HISTORY DROPDOWN - LIQUID GLASS
   =========================================== */

/* Search History Dropdown - Absolute positioning under search bar, Liquid Glass effect */
.search-history-dropdown {
  /* Removed position: fixed - now using absolute from component */
  max-height: 400px;
  overflow-y: auto;

  /* Liquid Glass effect - Core aesthetic */
  background: var(--glass-bg);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);

  /* Rounded-2xl corners - Universal softness */
  border-radius: var(--radius-2xl);

  /* Depth and definition */
  box-shadow: var(--shadow-md);
  border: 1px solid var(--glass-border);

  /* Content padding */
  padding: 0.75rem;

  /* Smooth appearance animation */
  opacity: 0;
  transform: translateY(-10px) scale(0.95);
  animation: search-dropdown-appear 0.3s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;

  /* Transform origin for natural scaling */
  transform-origin: top center;

  /* Prevent text selection during interaction */
  user-select: none;
  -webkit-user-select: none;
}

@keyframes search-dropdown-appear {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }

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

/* Header section */
.search-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
}

/* Divider with glass effect subtlety */
.search-history-divider {
  height: 1px;
  width: 100%;
  background: var(--glass-border);
  margin: 0.5rem 0;
}

/* List container */
.search-history-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

/* Individual history item */
.search-history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;

  /* Universal rounded-2xl for container elements */
  border-radius: var(--radius-2xl);

  padding: 0.75rem 1rem;
  cursor: pointer;

  /* Fluid animation - Physics-based transitions */
  transition: all var(--transition-fluid);

  /* Subtle background for hover/highlight */
  background: transparent;
}

/* Hover state - Light interaction */
.search-history-item:hover {
  background: color-mix(in srgb, var(--accent-color) 10%, transparent);
  transform: translateX(2px);
}

/* Highlighted state - Keyboard navigation */
.search-history-item.highlighted {
  background: color-mix(in srgb, var(--accent-color) 15%, transparent);
  transform: translateX(4px);

  /* Subtle inner-glow effect - Lensing principle */
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent-color) 30%, transparent);
}

/* Remove button */
.search-history-remove {
  display: flex;
  align-items: center;
  justify-content: center;

  /* Rounded-full for small circular elements */
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);

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

  cursor: pointer;
  flex-shrink: 0;

  /* Fluid animation */
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);

  /* Prevent triggering parent hover */
  z-index: 1;
}

.search-history-remove:hover {
  background: color-mix(in srgb, var(--text-color-secondary) 20%, transparent);
  color: var(--text-color);
  transform: scale(1.1);
}

.search-history-remove:active {
  transform: scale(0.95);
}

/* Optimize scrolling performance */
.search-history-dropdown {
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

/* Custom scrollbar for dropdown */
.search-history-dropdown::-webkit-scrollbar {
  width: 6px;
}

.search-history-dropdown::-webkit-scrollbar-track {
  background: transparent;
}

.search-history-dropdown::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--glass-bg) 80%, transparent);
  border-radius: var(--radius-full);
}

.search-history-dropdown::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--accent-color) 50%, transparent);
}

/* Empty state styling */
.search-history-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  text-align: center;
}

/* Accessibility - Focus visible states */
.search-history-item:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.search-history-remove:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 1px;
  border-radius: var(--radius-full);
}

/* Mobile optimizations */
@media (max-width: 640px) {
  .search-history-dropdown {
    /* Increase touch target sizes */
    padding: 0.5rem;
  }

  .search-history-item {
    padding: 1rem 0.75rem;
    /* Larger minimum touch target */
    min-height: 48px;
  }

  .search-history-remove {
    width: 32px;
    height: 32px;
  }
}

/* Dark mode enhancements */
body.dark .search-history-dropdown,
.dark .search-history-dropdown {
  /* Enhanced glass effect in dark mode */
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);

  /* Stronger shadow for depth */
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* ===========================================
   END SEARCH HISTORY DROPDOWN
   =========================================== */