/* Modern Image Hosting - Apple Style 2025 */
@import url('https://fonts.googleapis.com/css2?family=SF+Pro+Display:wght@300;400;500;600;700&display=swap');

:root {
  --primary-bg: #000000;
  --secondary-bg: #1c1c1e;
  --card-bg: rgba(28, 28, 30, 0.8);
  --glass-bg: rgba(28, 28, 30, 0.7);
  --accent-blue: #007aff;
  --accent-blue-hover: #0056cc;
  --accent-red: #ff3b30;
  --accent-red-hover: #d70015;
  --text-primary: #ffffff;
  --text-secondary: #8e8e93;
  --text-tertiary: #636366;
  --border-color: rgba(84, 84, 88, 0.3);
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-medium: rgba(0, 0, 0, 0.25);
  --shadow-heavy: rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

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

body {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Subtle animated background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 80%, rgba(0, 122, 255, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(0, 122, 255, 0.03) 0%, transparent 50%);
  z-index: -1;
  animation: subtleGlow 20s ease-in-out infinite alternate;
}

@keyframes subtleGlow {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
header {
  text-align: center;
  padding: 40px 0 60px;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

header h1 i {
  color: var(--accent-blue);
  font-size: 2.2rem;
}

/* Upload Section */
.upload-section {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-bottom: 48px;
  box-shadow: 0 8px 32px var(--shadow-light);
}

.drop-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  background: rgba(255, 255, 255, 0.02);
  position: relative;
  overflow: hidden;
}

.drop-zone::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 122, 255, 0.1), transparent);
  transition: left 0.5s;
}

.drop-zone:hover::before {
  left: 100%;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent-blue);
  background: rgba(0, 122, 255, 0.05);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 122, 255, 0.15);
}

.drop-zone i {
  font-size: 2.5rem;
  color: var(--accent-blue);
  margin-bottom: 16px;
  display: block;
}

.drop-zone p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0;
}

input[type="file"] {
  display: none;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  justify-content: center;
}

.upload-btn, .clear-btn {
  background: var(--accent-blue);
  color: var(--text-primary);
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
  min-width: 120px;
  justify-content: center;
}

.clear-btn {
  background: var(--accent-red);
  box-shadow: 0 4px 16px rgba(255, 59, 48, 0.3);
}

.upload-btn:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.clear-btn:hover {
  background: var(--accent-red-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 59, 48, 0.4);
}

.upload-btn:active, .clear-btn:active {
  transform: translateY(0);
}

/* Gallery */
.gallery {
  margin-bottom: 40px;
}

.gallery-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.gallery h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.01em;
  margin: 0;
}

.gallery h2 i {
  color: var(--accent-blue);
}

.gallery-controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

.view-toggle {
  display: flex;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.view-btn {
  background: none;
  border: none;
  padding: 8px 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.view-btn.active {
  background: var(--accent-blue);
  color: var(--text-primary);
}

.view-btn:hover:not(.active) {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.sort-select {
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sort-select:hover {
  border-color: var(--accent-blue);
}

/* Grid Layouts - WORKING VERSION */
.image-list {
  display: grid !important;
  gap: 16px;
  transition: all 0.3s ease;
  /* Default masonry layout */
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  grid-auto-rows: 10px;
}

/* Force remove any conflicting styles */
.image-list * {
  box-sizing: border-box;
}

/* Masonry Grid (Default) */
.image-list.masonry {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)) !important;
  grid-auto-rows: 10px !important;
  gap: 16px !important;
}

.image-list.masonry .image-card {
  grid-row-end: span var(--grid-rows, 30) !important;
  display: flex !important;
  flex-direction: column !important;
  height: auto !important;
}

/* Uniform Grid */
.image-list.uniform {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)) !important;
  grid-auto-rows: 400px !important;
  gap: 20px !important;
}

.image-list.uniform .image-card {
  grid-row-end: auto !important;
  height: 400px !important;
  display: flex !important;
  flex-direction: column !important;
}

.image-list.uniform .image-card img {
  height: 200px !important;
  object-fit: cover !important;
}

.image-list.uniform .image-info {
  flex: 1 !important;
  display: flex !important;
  flex-direction: column !important;
  justify-content: space-between !important;
}

/* Compact Grid */
.image-list.compact {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)) !important;
  grid-auto-rows: 280px !important;
  gap: 12px !important;
}

.image-list.compact .image-card {
  grid-row-end: auto !important;
  height: 280px !important;
  display: flex !important;
  flex-direction: column !important;
}

.image-list.compact .image-card img {
  height: 140px !important;
  object-fit: cover !important;
}

.image-list.compact .image-info {
  padding: 12px !important;
  flex: 1 !important;
  display: flex !important;
  flex-direction: column !important;
  justify-content: space-between !important;
}

.image-list.compact .image-info p {
  font-size: 0.85rem !important;
  margin: 2px 0 !important;
}

.image-list.compact .image-actions {
  display: flex !important;
  gap: 6px !important;
}

.image-list.compact .copy-btn,
.image-list.compact .delete-btn {
  padding: 6px 10px !important;
  font-size: 0.75rem !important;
}

/* List View */
.image-list.list {
  grid-template-columns: 1fr !important;
  grid-auto-rows: auto !important;
  gap: 12px !important;
}

.image-list.list .image-card {
  display: flex !important;
  flex-direction: row !important;
  height: 120px !important;
  max-width: 100% !important;
  grid-row-end: auto !important;
}

.image-list.list .image-card img {
  width: 160px !important;
  height: 120px !important;
  flex-shrink: 0 !important;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg) !important;
  object-fit: cover !important;
}

.image-list.list .image-info {
  padding: 16px !important;
  flex: 1 !important;
  min-width: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  justify-content: space-between !important;
}

.image-list.list .image-info p {
  margin: 2px 0 !important;
  font-size: 0.9rem !important;
}

.image-list.list .image-actions {
  margin-top: 8px !important;
  gap: 8px !important;
  display: flex !important;
  flex-direction: row !important;
}

.image-list.list .copy-btn,
.image-list.list .delete-btn {
  padding: 6px 12px !important;
  font-size: 0.8rem !important;
  flex: none !important;
  width: auto !important;
}

/* Image Cards */
.image-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 2px 12px var(--shadow-light);
  display: flex;
  flex-direction: column;
  position: relative;
  cursor: pointer;
}

.image-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(0, 122, 255, 0.05), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
}

.image-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--shadow-medium);
  border-color: rgba(0, 122, 255, 0.2);
}

.image-card:hover::before {
  opacity: 1;
}

.image-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  background: var(--secondary-bg);
}

.image-card:hover img {
  transform: scale(1.02);
}

/* Compact view adjustments */
.image-list.compact .image-card img {
  height: 160px;
}

.image-list.compact .image-info {
  padding: 16px;
}

.image-list.compact .image-info p {
  font-size: 0.85rem;
}

/* Image overlay info */
.image-overlay {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: 0.75rem;
  color: var(--text-primary);
  font-weight: 500;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 2;
}

.image-card:hover .image-overlay {
  opacity: 1;
}

/* Loading placeholder */
.image-card.loading img {
  background: linear-gradient(90deg, var(--secondary-bg) 25%, rgba(255,255,255,0.1) 50%, var(--secondary-bg) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

/* Empty gallery state */
.empty-gallery {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  text-align: center;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px) saturate(180%);
}

.empty-gallery i {
  font-size: 4rem !important;
  color: var(--text-tertiary) !important;
  margin-bottom: 1rem !important;
  opacity: 0.6;
}

.empty-gallery h3 {
  color: var(--text-secondary) !important;
  font-weight: 500 !important;
  margin-bottom: 0.5rem !important;
  font-size: 1.2rem;
}

.empty-gallery p {
  color: var(--text-tertiary) !important;
  font-size: 0.9rem !important;
  margin: 0;
}

/* Search and filter bar */
.gallery-search {
  margin-bottom: 20px;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.search-input {
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  color: var(--text-primary);
  font-size: 0.9rem;
  flex: 1;
  min-width: 200px;
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.filter-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-tag {
  background: var(--accent-blue);
  color: var(--text-primary);
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.filter-tag.active {
  background: var(--accent-blue-hover);
}

.filter-tag:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-1px);
}

/* Stats bar */
.gallery-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.stats-left {
  display: flex;
  gap: 20px;
}

.stats-right {
  color: var(--text-tertiary);
}

/* Infinite scroll loader */
.scroll-loader {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.scroll-loader.visible {
  opacity: 1;
}

.scroll-loader .spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--accent-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.image-info {
  padding: 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.image-info p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.image-info p:first-child {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.image-info a {
  color: var(--accent-blue);
  text-decoration: none;
  word-break: break-all;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}

.image-info a:hover {
  color: var(--accent-blue-hover);
  text-decoration: underline;
}

.image-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.copy-btn, .delete-btn {
  background: var(--accent-blue);
  color: var(--text-primary);
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
  text-decoration: none;
}

.delete-btn {
  background: var(--accent-red);
}

.copy-btn:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-1px);
}

.delete-btn:hover {
  background: var(--accent-red-hover);
  transform: translateY(-1px);
}

.copy-btn:active, .delete-btn:active {
  transform: translateY(0);
}

/* Notifications */
.notification {
  position: fixed;
  top: 24px;
  right: 24px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-color);
  animation: slideInFromTop 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
             slideOutToTop 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 4.6s forwards;
  z-index: 1000;
  box-shadow: 0 8px 32px var(--shadow-medium);
  max-width: 300px;
}

.notification.success {
  background: rgba(52, 199, 89, 0.9);
  border-color: rgba(52, 199, 89, 0.3);
}

.notification.error {
  background: rgba(255, 59, 48, 0.9);
  border-color: rgba(255, 59, 48, 0.3);
}

@keyframes slideInFromTop {
  from { 
    transform: translateY(-100px);
    opacity: 0;
  }
  to { 
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideOutToTop {
  from { 
    transform: translateY(0);
    opacity: 1;
  }
  to { 
    transform: translateY(-100px);
    opacity: 0;
  }
}

/* Footer */
footer {
  text-align: center;
  padding: 48px 0 24px;
  color: var(--text-tertiary);
  font-size: 0.9rem;
  font-weight: 400;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 16px;
  }

  header {
    padding: 24px 0 40px;
  }

  header h1 {
    font-size: 2rem;
    flex-direction: column;
    gap: 8px;
  }

  .upload-section {
    padding: 24px;
    margin-bottom: 32px;
  }

  .drop-zone {
    padding: 32px 16px;
  }

  .drop-zone i {
    font-size: 2rem;
  }

  .drop-zone p {
    font-size: 1rem;
  }

  .form-actions {
    flex-direction: column;
    align-items: center;
  }

  .upload-btn, .clear-btn {
    width: 100%;
    max-width: 200px;
  }

  .gallery-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .gallery-controls {
    width: 100%;
    justify-content: space-between;
  }

  .image-list.masonry,
  .image-list.uniform,
  .image-list.compact {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
  }

  .image-list.list .image-card {
    flex-direction: column;
    height: auto;
  }

  .image-list.list .image-card img {
    width: 100%;
    height: 180px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }

  .image-actions {
    flex-direction: column;
    gap: 8px;
  }

  .notification {
    top: 16px;
    right: 16px;
    left: 16px;
    max-width: none;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.6rem;
  }

  .upload-section {
    padding: 20px;
  }

  .drop-zone {
    padding: 24px 12px;
  }

  .image-info {
    padding: 16px;
  }

  .image-list.masonry,
  .image-list.uniform,
  .image-list.compact {
    grid-template-columns: 1fr;
  }

  .view-toggle {
    flex: 1;
  }

  .view-btn {
    flex: 1;
    font-size: 0.8rem;
  }

  .sort-select {
    font-size: 0.8rem;
    padding: 6px 10px;
  }
}

/* Large screens optimization */
@media (min-width: 1400px) {
  .image-list.masonry {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
  
  .image-list.uniform {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  }
}

/* Extra large screens */
@media (min-width: 1800px) {
  .container {
    max-width: 1600px;
  }
  
  .image-list.masonry {
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  }
  
  .image-list.uniform {
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
  :root {
    --shadow-light: rgba(0, 0, 0, 0.2);
    --shadow-medium: rgba(0, 0, 0, 0.4);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for accessibility */
button:focus-visible,
.drop-zone:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-color: rgba(255, 255, 255, 0.5);
    --text-secondary: #ffffff;
  }
}