/*
 * YouTube Thumbnail Downloader - Main Stylesheet
 * Features: Light/Dark Theme, Glassmorphism, Modern Gradients, Responsive Layouts, Fluid Animations
 */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* --- CSS Variables & Design System --- */
:root {
  /* Common System Settings */
  --font-main: 'Poppins', sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  --border-radius-xl: 32px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(63, 94, 251, 0.3);

  /* Light Theme Colors (Default) */
  --bg-primary: #faf9fb;
  --bg-secondary: #ffffff;
  --text-primary: #1e1b4b;
  --text-secondary: #6b7280;
  --text-muted: #94a3b8;
  
  --primary-gradient: linear-gradient(to right, #3f5efb, #fc466b);
  --secondary-gradient: linear-gradient(to right, #3f5efb, #fc466b);
  --accent-color: #fc466b;
  
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(255, 255, 255, 0.4);
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-border: rgba(255, 255, 255, 0.5);
  
  --input-bg: rgba(255, 255, 255, 0.9);
  --input-border: rgba(0, 0, 0, 0.08);
  
  --alert-success-bg: rgba(16, 185, 129, 0.15);
  --alert-success-text: #065f46;
  --alert-error-bg: rgba(239, 68, 68, 0.1);
  --alert-error-text: #991b1b;
  
  --blob-1: rgba(63, 94, 251, 0.1);
  --blob-2: rgba(252, 70, 107, 0.1);
  --blob-3: rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-primary: #0a051d;
  --bg-secondary: #120b2e;
  --text-primary: #ffffff;
  --text-secondary: #a5b4fc;
  --text-muted: #64748b;
  
  --primary-gradient: linear-gradient(to right, #3f5efb, #fc466b);
  --secondary-gradient: linear-gradient(to right, #2f4ecb, #ec365b);
  
  --glass-bg: rgba(18, 11, 46, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(20, 22, 33, 0.75);
  --card-border: rgba(255, 255, 255, 0.05);
  
  --input-bg: rgba(18, 11, 46, 0.9);
  --input-border: rgba(255, 255, 255, 0.1);
  
  --alert-success-bg: rgba(16, 185, 129, 0.2);
  --alert-success-text: #34d399;
  --alert-error-bg: rgba(239, 68, 68, 0.2);
  --alert-error-text: #fca5a5;
  
  --blob-1: rgba(63, 94, 251, 0.15);
  --blob-2: rgba(252, 70, 107, 0.15);
  --blob-3: rgba(124, 58, 237, 0.15);
}

/* --- Base & Reset Styles --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  background-image: linear-gradient(135deg, rgba(63, 94, 251, 0.04) 0%, rgba(252, 70, 107, 0.04) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* --- Glow Background Blobs --- */
.bg-blobs {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  animation: float 20s infinite alternate;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background-color: var(--blob-1);
}

.blob-2 {
  bottom: 10%;
  right: -10%;
  width: 45vw;
  height: 45vw;
  background-color: var(--blob-2);
  animation-delay: -5s;
}

.blob-3 {
  top: 40%;
  left: 30%;
  width: 35vw;
  height: 35vw;
  background-color: var(--blob-3);
  animation-delay: -10s;
}

@keyframes float {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5%, 10%) scale(1.1); }
  100% { transform: translate(-5%, -5%) scale(0.9); }
}

/* --- Header / Navigation --- */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition-normal), border var(--transition-normal);
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.logo i {
  -webkit-text-fill-color: initial;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  color: #ff2e93; /* fallback */
  font-size: 1.8rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links li.active a {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-links a:hover::after,
.nav-links li.active a::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Switcher Button */
.theme-btn {
  background: none;
  border: 1px solid var(--glass-border);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-primary);
  font-size: 1.1rem;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
  background-color: var(--bg-secondary);
}

.theme-btn:hover {
  transform: scale(1.05);
  border-color: var(--text-secondary);
}

.theme-btn .fa-sun {
  display: none;
}

[data-theme="dark"] .theme-btn .fa-moon {
  display: none;
}

[data-theme="dark"] .theme-btn .fa-sun {
  display: block;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* --- Hero & Main Card Container --- */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

.hero {
  text-align: center;
  margin-bottom: 3.5rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.hero h1 span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
  font-weight: 400;
}

/* Glassmorphism Converter Card */
.converter-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
  max-width: 850px;
  margin: 0 auto 3rem;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.downloader-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.input-icon {
  position: absolute;
  left: 1.25rem;
  color: var(--text-muted);
  font-size: 1.2rem;
  pointer-events: none;
  transition: color var(--theme-transition);
}

.downloader-input {
  width: 100%;
  padding: 1.25rem 7.5rem 1.25rem 3.25rem;
  font-family: var(--font-main);
  font-size: 1.05rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--input-border);
  background-color: var(--input-bg);
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.downloader-input:focus {
  border-color: #ff2e93;
  box-shadow: 0 0 0 3px rgba(255, 46, 147, 0.15), var(--shadow-sm);
}

.downloader-input:focus + .input-icon {
  color: #ff2e93;
}

/* Fast Action Buttons Inside Input */
.input-actions {
  position: absolute;
  right: 0.75rem;
  display: flex;
  gap: 0.5rem;
}

.paste-btn, .clear-input-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 0.95rem;
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.paste-btn:hover, .clear-input-btn:hover {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

[data-theme="dark"] .paste-btn:hover,
[data-theme="dark"] .clear-input-btn:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.clear-input-btn {
  display: none; /* hidden until typed */
}

/* Main Call to Action Button */
.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  border: none;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 1.1rem;
  padding: 1.1rem 2rem;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  user-select: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow), var(--shadow-md);
  filter: brightness(1.05);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary i {
  font-size: 1.2rem;
}

/* Alert Notification Panel */
.alert-box {
  display: none;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-radius: var(--border-radius-md);
  margin-top: 1rem;
  font-weight: 500;
  font-size: 0.95rem;
  animation: slideDown var(--transition-normal);
}

.alert-box.error {
  display: flex;
  background-color: var(--alert-error-bg);
  color: var(--alert-error-text);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-box.success {
  display: flex;
  background-color: var(--alert-success-bg);
  color: var(--alert-success-text);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Video Info Card --- */
.video-info-wrapper {
  display: none;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  margin-bottom: 2.5rem;
  animation: fadeIn var(--transition-normal);
  align-items: center;
  gap: 1.5rem;
}

.video-info-wrapper.active {
  display: flex;
}

.video-channel-icon {
  width: 50px;
  height: 50px;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.video-details {
  flex-grow: 1;
}

.video-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.video-author {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.video-author a {
  color: var(--accent-color);
  text-decoration: none;
  transition: text-decoration var(--transition-fast);
}

.video-author a:hover {
  text-decoration: underline;
}

.btn-share {
  background: none;
  border: 1px solid var(--glass-border);
  padding: 0.6rem 1rem;
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

.btn-share:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

/* --- Loading skeleton loaders --- */
.loading-wrapper {
  display: none;
  margin-top: 2rem;
}

.loading-wrapper.active {
  display: block;
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.skeleton-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skeleton-img {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--border-radius-sm);
  background: linear-gradient(90deg, var(--glass-border) 25%, var(--input-border) 50%, var(--glass-border) 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 1.5s infinite;
}

.skeleton-text {
  height: 20px;
  width: 60%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--glass-border) 25%, var(--input-border) 50%, var(--glass-border) 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 1.5s infinite;
}

.skeleton-btn-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.skeleton-btn {
  height: 38px;
  flex: 1;
  border-radius: var(--border-radius-sm);
  background: linear-gradient(90deg, var(--glass-border) 25%, var(--input-border) 50%, var(--glass-border) 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 1.5s infinite;
}

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

/* --- Results Section --- */
.results-section {
  display: none;
  animation: fadeIn var(--transition-slow);
}

.results-section.active {
  display: block;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  border-left: 4px solid #ff2e93;
  padding-left: 1rem;
}

.section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
}

.thumbnail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

/* High Quality Card Highlighted */
.thumbnail-grid .card-maxres {
  grid-column: span 2;
}

@media (max-width: 900px) {
  .thumbnail-grid .card-maxres {
    grid-column: span 1;
  }
}

/* Glassmorphic Thumbnail Card */
.thumbnail-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.thumbnail-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 46, 147, 0.2);
}

/* Highlight badge for Max Resolution */
.quality-badge {
  position: absolute;
  top: 1.75rem;
  left: 1.75rem;
  background: var(--primary-gradient);
  color: #fff;
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-sm);
  z-index: 2;
}

.thumbnail-preview-container {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  position: relative;
  background-color: var(--input-bg);
  box-shadow: inset 0 0 10px rgba(0,0,0,0.05);
}

.thumbnail-preview-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.thumbnail-card:hover .thumbnail-preview-container img {
  transform: scale(1.03);
}

.thumbnail-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.resolution-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.resolution-dimensions {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  background-color: var(--bg-primary);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.thumbnail-actions {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 0.5rem;
}

/* Base button styles inside cards */
.btn-card {
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.7rem 0.5rem;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.btn-download {
  background: var(--primary-gradient);
  color: #fff;
}

.btn-download:hover {
  filter: brightness(1.08);
  box-shadow: 0 4px 12px rgba(255, 46, 147, 0.25);
}

.btn-secondary {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

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

.btn-icon-only {
  font-size: 1.05rem;
  position: relative;
}

/* Success Alert Tooltip */
.tooltip-success {
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%) translateY(5px);
  background-color: #10b981;
  color: #fff;
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.tooltip-success::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: #10b981;
}

.tooltip-success.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --- Recent History Section --- */
.history-section {
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  margin-top: 4rem;
  box-shadow: var(--shadow-md);
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.history-header h3 {
  font-size: 1.35rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.history-header h3 i {
  color: #ff2e93;
}

.btn-clear-history {
  background: none;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.btn-clear-history:hover {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.2);
}

.history-empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem 0;
  font-size: 0.95rem;
}

.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
}

.history-card {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
}

.history-card:hover {
  transform: translateY(-3px);
  border-color: #ff2e93;
  box-shadow: var(--shadow-sm);
}

.history-thumb {
  aspect-ratio: 16/9;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  width: 100%;
}

.history-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.history-details {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.history-title {
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.history-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.history-channel {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 70%;
}

.btn-delete-history-item {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  font-size: 0.85rem;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.btn-delete-history-item:hover {
  color: #ef4444;
  background-color: rgba(239, 68, 68, 0.1);
}

/* --- Standard Inner Pages Content Styles --- */
.content-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 3.5rem 3rem;
  box-shadow: var(--shadow-lg);
  max-width: 900px;
  margin: 0 auto;
  transition: background-color var(--transition-slow);
}

.content-card h2 {
  font-size: 2rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  border-bottom: 2px solid var(--glass-border);
  padding-bottom: 0.5rem;
}

.content-card h2:first-of-type {
  margin-top: 0;
}

.content-card p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.content-card ul, .content-card ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
  color: var(--text-secondary);
}

.content-card li {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

/* Contact Page Specific - Glassmorphism Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.9rem 1.25rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--input-border);
  background-color: var(--input-bg);
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-normal);
}

.form-control:focus {
  border-color: #ff2e93;
  box-shadow: 0 0 0 3px rgba(255, 46, 147, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* --- Toast Popup Notifications --- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: var(--bg-secondary);
  border-left: 4px solid #3b82f6;
  border-radius: var(--border-radius-sm);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 300px;
  max-width: 450px;
  animation: toastIn var(--transition-normal) forwards;
  position: relative;
}

.toast.toast-success {
  border-left-color: #10b981;
}

.toast.toast-error {
  border-left-color: #ef4444;
}

.toast.toast-warning {
  border-left-color: #f59e0b;
}

@keyframes toastIn {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.toast.toast-out {
  animation: toastOut var(--transition-normal) forwards;
}

@keyframes toastOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(120%); opacity: 0; }
}

/* --- Footer Section --- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 4rem 2rem 2rem;
  margin-top: auto;
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 320px;
}

.footer-socials {
  display: flex;
  gap: 1rem;
}

.footer-socials a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.footer-socials a:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
  transform: translateY(-2px);
}

.footer-links h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  position: relative;
}

.footer-links h4::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 25px;
  height: 2px;
  background: var(--primary-gradient);
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--glass-border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--text-primary);
}

/* --- Animations Utility --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Media Queries --- */
@media (max-width: 768px) {
  header {
    padding: 0.5rem 0;
  }
  
  .navbar {
    padding: 0.5rem 1.5rem;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--glass-border);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .nav-links a {
    font-size: 1.1rem;
    width: 100%;
    text-align: center;
    display: block;
    padding: 0.5rem 0;
  }
  
  .nav-links a::after {
    display: none;
  }
  
  .hero h1 {
    font-size: 2.25rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .converter-card {
    padding: 1.5rem;
  }
  
  .downloader-input {
    padding: 1.1rem 6.5rem 1.1rem 3rem;
    font-size: 0.95rem;
  }
  
  .btn-primary {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  main {
    padding: 2rem 1rem 4rem;
  }
  
  .hero h1 {
    font-size: 1.85rem;
  }
  
  .thumbnail-actions {
    grid-template-columns: 1fr;
  }
  
  .downloader-input {
    padding-right: 3rem; /* Hide paste texts, keep icon */
  }
  
  .paste-btn span {
    display: none; /* Hide 'Paste' text, keep icon */
  }
}

/* --- YouTube Tag Generator Styles --- */
.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  margin-bottom: 2rem;
  min-height: 50px;
}

.tag-badge {
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

.tag-badge:hover {
  background-color: var(--input-bg);
  border-color: var(--text-secondary);
  transform: translateY(-1px);
}

.tag-badge.selected {
  background: var(--primary-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 10px rgba(255, 46, 147, 0.2);
}

.tag-badge i {
  font-size: 0.8rem;
  transition: transform var(--transition-fast);
}

.tag-badge.selected i {
  transform: rotate(45deg);
}

.tags-actions-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 1px solid var(--glass-border);
  padding-top: 1.5rem;
  margin-top: 1.5rem;
}

.tags-counter {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.tags-action-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* --- Link Shortener Styles --- */
.shortener-result-card {
  display: none;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  margin-top: 2rem;
  animation: fadeIn var(--transition-normal);
}

.shortener-result-card.active {
  display: block;
}

.shortener-result-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.shortened-link-display {
  flex-grow: 1;
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  padding: 1rem 1.25rem;
  border-radius: var(--border-radius-md);
  font-weight: 600;
  color: #ff2e93;
  font-size: 1.1rem;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 250px;
}

.qr-code-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--glass-border);
  padding-top: 1.5rem;
  text-align: center;
}

.qr-code-img {
  background-color: white;
  padding: 1rem;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  display: inline-block;
}

.qr-code-img img {
  display: block;
  width: 150px;
  height: 150px;
}

/* Local Shorten History Grid */
.shorten-history-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.shorten-history-item {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: all var(--transition-normal);
}

.shorten-history-item:hover {
  border-color: rgba(255, 46, 147, 0.2);
  box-shadow: var(--shadow-sm);
}

.shorten-history-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
  flex-grow: 1;
}

.history-short-link {
  font-weight: 600;
  color: #ff2e93;
  text-decoration: none;
  font-size: 0.95rem;
}

.history-original-link {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.shorten-history-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}