/* Critical CSS - Loads immediately with HTML to prevent layout shifts */

:root {
  --primary-color: #ff4500; /* Reddit orange */
  --background-color: #121212;
  --card-background-color: #1e1e1e;
  --text-color: #ffffff;
  --secondary-text-color: #b8b8b8;
  --border-color: #333333;
  --error-color: #ff6b6b;
  --success-color: #4caf50;
  --header-height: 64px;
  --sidebar-width: 240px;
  --border-radius: 8px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;

  font-family: var(--font-family);
  line-height: 1.5;
  font-weight: 400;
  color-scheme: dark;
  color: var(--text-color);
  background-color: var(--background-color);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

/* Font loading optimization */
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 400;
  font-display: swap; /* Prevents invisible text during font load */
  src: local('Roboto'), local('Roboto-Regular');
}

/* CSS Reset - Critical for layout stability */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background-color: #121212;
  color: #ffffff;
  overflow-x: hidden; /* Prevent horizontal scroll during layout */
}

/* App container - Critical layout structure */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: #121212;
}

/* Header skeleton - Prevents header jump */
header {
  flex-shrink: 0;
  background-color: #1a1a1a;
  border-bottom: 1px solid #30363d;
  min-height: 64px; /* Reserve space to prevent CLS */
}

/* Main content area */
main {
  flex: 1;
  position: relative;
  background-color: #121212;
}

/* Critical loading skeleton for media grid */
.media-grid-skeleton {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  padding: 16px;
  min-height: 400px; /* Reserve space for content */
}

.media-item-skeleton {
  background: linear-gradient(90deg, #1e1e1e 25%, #2a2a2a 50%, #1e1e1e 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
  aspect-ratio: 1.2;
  min-height: 250px; /* Prevent collapse */
}

/* Shimmer animation for loading states */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Navigation skeleton */
.nav-skeleton {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background-color: #1a1a1a;
}

.nav-item-skeleton {
  height: 32px;
  background-color: #2a2a2a;
  border-radius: 4px;
  animation: shimmer 1.5s infinite;
}

.nav-logo-skeleton {
  width: 120px;
}

.nav-search-skeleton {
  flex: 1;
  max-width: 300px;
}

.nav-button-skeleton {
  width: 80px;
}

/* Search form skeleton */
.search-skeleton {
  height: 40px;
  background-color: #2a2a2a;
  border-radius: 20px;
  border: 1px solid #30363d;
}

/* Subreddit navigation skeleton */
.subreddit-nav-skeleton {
  display: flex;
  gap: 8px;
  padding: 8px 16px;
  background-color: #1a1a1a;
  border-bottom: 1px solid #30363d;
  min-height: 48px;
}

.subreddit-nav-skeleton .nav-item-skeleton {
  width: 80px;
  height: 24px;
}

/* Details view skeleton */
.details-skeleton {
  padding: 16px;
  background-color: #1e1e1e;
  border-bottom: 1px solid #30363d;
  min-height: 100px;
}

.details-skeleton-line {
  height: 16px;
  background-color: #2a2a2a;
  border-radius: 2px;
  margin-bottom: 8px;
  animation: shimmer 1.5s infinite;
}

.details-skeleton-line:nth-child(1) {
  width: 60%;
}

.details-skeleton-line:nth-child(2) {
  width: 80%;
}

.details-skeleton-line:nth-child(3) {
  width: 45%;
}

/* Responsive layout - Critical breakpoints */
@media (max-width: 768px) {
  .media-grid-skeleton {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 12px;
    padding: 12px;
  }
  
  .nav-skeleton {
    flex-wrap: wrap;
    padding: 8px 12px;
  }
}

@media (max-width: 480px) {
  .media-grid-skeleton {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px;
  }
}

/* Loading spinner - Critical for immediate feedback */
.spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Error state - Critical for UX */
.error-message {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: #ff6b6b;
  background-color: #2a1f1f;
  border: 1px solid #ff6b6b;
  border-radius: 8px;
  margin: 16px;
}

/* Hide content that shouldn't show during loading */
.js-only {
  visibility: hidden;
}

/* Show content after JS loads */
.js-loaded .js-only {
  visibility: visible;
}

/* Critical button styles to prevent FOUC */
button {
  font-family: inherit;
  font-size: 14px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: none; /* Remove transitions during initial load */
}

/* Critical form styles */
input {
  font-family: inherit;
  font-size: 14px;
  border: 1px solid #30363d;
  border-radius: 4px;
  background-color: #2a2a2a;
  color: #ffffff;
}

/* Critical link styles */
a {
  color: #58a6ff;
  text-decoration: none;
}

/* Ensure images don't cause layout shifts */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Critical accessibility styles */
:focus {
  outline: 2px solid #58a6ff;
  outline-offset: 2px;
}

/* Screen reader only content */
.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;
}

/* === HEADER COMPONENT STYLES === */
/* Replace skeleton styles with actual header component styles */

header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--card-background-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0 var(--spacing-sm);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform 0.3s ease;
}

@media (max-width: 992px) {
  header {
    flex-wrap: wrap;
    height: auto;
    padding: 4px var(--spacing-sm);
    gap: 4px;
  }
}

/* Top row - Logo, Search, Controls */
.top-row {
  display: flex;
  align-items: center;
  height: 45px;
  gap: var(--spacing-xs);
  width: 100%;
}

@media (max-width: 992px) {
  .top-row {
    flex-wrap: wrap;
    height: auto;
  }
}

/* Logo */
.logo, a[href="/"] {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--primary-color);
  flex-shrink: 0;
  min-width: 80px;
  text-decoration: none;
}

.logo:hover, a[href="/"]:hover {
  text-decoration: none;
}

/* Navigation */
nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
  margin-left: auto;
  justify-content: flex-end;
}

@media (max-width: 768px) {
  nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}

@media (max-width: 576px) {
  nav {
    width: 100%;
    justify-content: space-between;
  }
}

/* Search Form */
form {
  width: 330px;
  min-width: 120px;
  margin: 0 auto;
  flex: 0 1 auto;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

@media (max-width: 992px) {
  form {
    position: static;
    transform: none;
    order: 1;
    width: auto;
    flex: 1;
    margin-right: 16px;
  }
}

@media (max-width: 576px) {
  form {
    width: 100%;
    max-width: none;
    margin: 2px 0;
    margin-right: 12px;
  }
}

/* Search Input */
input[type="text"], input[type="search"] {
  width: 100%;
  padding: 2px 8px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  font-size: 0.8rem;
  height: 26px;
}

input[type="text"]:focus, input[type="search"]:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: rgba(255, 255, 255, 0.15);
}

input::placeholder {
  color: var(--secondary-text-color);
}

/* Subreddit Navigation Container */
.subreddit-nav-container {
  width: 100%;
  height: 100%;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
  scrollbar-color: var(--primary-color) transparent;
  position: relative;
  display: flex;
  align-items: center;
  -webkit-overflow-scrolling: touch;
}

.subreddit-nav-container::-webkit-scrollbar {
  height: 3px;
}

.subreddit-nav-container::-webkit-scrollbar-track {
  background: transparent;
}

.subreddit-nav-container::-webkit-scrollbar-thumb {
  background-color: var(--primary-color);
  border-radius: 20px;
}

/* Navigation Arrows */
.nav-arrows-container {
  position: relative;
  width: 100%;
  height: 38px;
  margin: 0;
}

.scroll-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: rgba(0, 0, 0, 0.7);
  color: var(--text-color);
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  padding: 0;
  font-size: 14px;
}

.scroll-arrow:hover {
  background-color: rgba(255, 69, 0, 0.7);
}

.scroll-arrow.left {
  left: 2px;
}

.scroll-arrow.right {
  right: 2px;
}

@media (max-width: 768px) {
  .scroll-arrow {
    width: 20px;
    height: 20px;
    font-size: 12px;
  }
}

/* Subreddits Wrapper */
.subreddits-wrapper {
  position: relative;
  width: 100%;
  padding: 0 26px;
  box-sizing: border-box;
}

.subreddits-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  right: 26px;
  height: 100%;
  width: 30px;
  background: linear-gradient(to right, transparent, var(--card-background-color));
  pointer-events: none;
}

.subreddits-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 26px;
  height: 100%;
  width: 20px;
  background: linear-gradient(to left, transparent, var(--card-background-color));
  pointer-events: none;
  z-index: 1;
}

/* Subreddit Links */
.subreddit-button, a[href^="/r/"] {
  display: inline-block;
  padding: 4px 6px;
  margin-right: 4px;
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  color: var(--text-color);
  transition: all 0.2s ease;
  border: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.05);
  min-width: 50px;
  text-align: center;
  text-decoration: none;
}

.subreddit-button:last-child, a[href^="/r/"]:last-child {
  margin-right: 15px;
}

.subreddit-button:hover, a[href^="/r/"]:hover {
  background-color: rgba(255, 69, 0, 0.15);
  text-decoration: none;
}

.subreddit-button.active, a[href^="/r/"].active {
  background-color: rgba(255, 69, 0, 0.2);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

/* Filter Controls */
.filter-container {
  position: relative;
  display: flex;
  align-items: center;
  z-index: 100;
  height: 30px;
}

@media (max-width: 992px) {
  .filter-container {
    height: auto;
  }
}

@media (max-width: 480px) {
  .filter-container {
    margin: 0;
    min-height: 26px;
    flex-shrink: 0;
  }
}

.filter-label {
  font-size: 0.7rem;
  color: var(--secondary-text-color);
  margin-right: 2px;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .filter-label {
    display: none;
  }
}

.filter-button {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.75rem;
  transition: all 0.2s ease;
  height: 26px;
}

.filter-button.active {
  background-color: rgba(255, 69, 0, 0.2);
  color: var(--primary-color);
}

.filter-button:hover {
  background-color: rgba(255, 69, 0, 0.15);
}

/* Source Toggle */
.source-toggle-container {
  position: relative;
  display: flex;
  align-items: center;
  margin-left: auto;
  margin-right: 10px;
}

@media (max-width: 992px) {
  .source-toggle-container {
    margin-left: 0;
    order: 2;
    z-index: 5;
    flex-shrink: 0;
    position: relative;
  }
}

@media (max-width: 768px) {
  .source-toggle-container {
    margin-right: 5px;
  }
}

.source-toggle-button {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.75rem;
  transition: all 0.2s ease;
  height: 28px;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.source-toggle-button.active {
  background-color: rgba(255, 69, 0, 0.2);
  color: var(--primary-color);
}

.source-toggle-button:hover {
  background-color: rgba(255, 69, 0, 0.15);
}

@media (max-width: 480px) {
  .source-toggle-button {
    font-size: 0.7rem;
    padding: 2px 4px;
    height: 26px;
  }
}

/* Title Toggle Button */
.title-toggle-button {
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  cursor: pointer;
  border-radius: var(--border-radius);
  background: var(--card-background-color);
  font-weight: 500;
  font-size: 0.75rem;
  height: 26px;
  white-space: nowrap;
}

.title-toggle-button:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--primary-color);
}

@media (max-width: 480px) {
  .title-toggle-button {
    padding: 2px 4px;
    font-size: 0.7rem;
  }
}

@media (max-width: 360px) {
  .title-toggle-button span {
    display: none;
  }
}

/* === MEDIA GRID STYLES === */
/* Replace skeleton with actual media grid */

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  padding: 16px;
  min-height: 400px;
}

@media (max-width: 768px) {
  .media-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 12px;
    padding: 12px;
  }
}

@media (max-width: 480px) {
  .media-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px;
  }
}

/* Media Items */
.media-item {
  background-color: var(--card-background-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  position: relative;
  transition: transform 0.2s ease;
}

.media-item:hover {
  transform: translateY(-2px);
}

.media-item img, .media-item video {
  width: 100%;
  height: auto;
  display: block;
}

/* Media Item Links */
.media-item a {
  display: block;
  color: inherit;
  text-decoration: none;
}

.media-item a:hover {
  text-decoration: none;
}

/* Post Titles and Info */
.post-title {
  padding: 8px 12px;
  font-size: 0.9rem;
  line-height: 1.3;
  color: var(--text-color);
}

.post-info {
  padding: 4px 12px 8px;
  font-size: 0.75rem;
  color: var(--secondary-text-color);
}

.post-info a {
  color: var(--primary-color);
}

.post-info a:hover {
  text-decoration: underline;
}

/* === UTILITY STYLES === */

/* Global link styles */
a {
  color: var(--primary-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Button reset */
button {
  cursor: pointer;
  font-family: var(--font-family);
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

/* Global body styles */
body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-y: scroll;
  overflow-x: hidden;
}

/* Hide scrollbar styles */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--background-color);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: #555;
  border-radius: 10px;
}

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

/* Container utility */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Error message utility */
.error-message {
  color: var(--error-color);
  padding: var(--spacing-md);
  background-color: rgba(255, 107, 107, 0.1);
  border-radius: var(--border-radius);
  margin: var(--spacing-md) 0;
}

/* Loading message utility */
.loading-message {
  color: var(--secondary-text-color);
  text-align: center;
  padding: var(--spacing-lg) 0;
}