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

:root {
  /* Dynamic Light Theme - Inspired by modern interfaces like Vercel & Apple */
  --bg-color: #f8fafc;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.05);

  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --success-color: #10b981;
  --success-hover: #059669;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Overrides */
body.dark {
  --bg-color: #0f172a;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --glass-bg: rgba(15, 23, 42, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-lg);
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

/* Animated Background Blobs */
.glass-bg-blobs {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: -1;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  animation: float 20s infinite ease-in-out alternate;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: rgba(59, 130, 246, 0.3);
}

.blob-2 {
  bottom: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: rgba(16, 185, 129, 0.2);
  animation-delay: -5s;
}

.blob-3 {
  top: 20%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: rgba(236, 72, 153, 0.2);
  animation-delay: -10s;
}

.blob-4 {
  bottom: 10%;
  left: -20%;
  width: 550px;
  height: 550px;
  background: rgba(139, 92, 246, 0.2);
  animation-delay: -15s;
}

body.dark .blob {
  opacity: 0.4;
}

@keyframes float {
  0% {
    transform: translate(0, 0) scale(1);
  }

  50% {
    transform: translate(50px, 50px) scale(1.1);
  }

  100% {
    transform: translate(-50px, 20px) scale(0.9);
  }
}

/* Lock Screen */
.lock-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 20px;
  background: var(--bg-color);
}

.lock-card {
  padding: 48px 40px;
  text-align: center;
  width: 100%;
  max-width: 420px;
  animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.lock-icon-wrapper {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 40px;
}

.lock-card h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.lock-card p {
  color: var(--text-muted);
  margin-bottom: 32px;
}

.input-group {
  position: relative;
  margin-bottom: 24px;
}

.input-group i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 20px;
}

.input-group input {
  width: 100%;
  padding: 16px 16px 16px 48px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.3);
  color: var(--text-main);
  font-size: 1rem;
  outline: none;
  transition: all var(--transition-fast);
}

body.dark .input-group input {
  background: rgba(0, 0, 0, 0.2);
}

.input-group input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.lock-card .btn-primary {
  width: 100%;
  padding: 16px;
  font-size: 1.125rem;
}

.error {
  color: var(--danger-color);
  margin-top: 16px;
  font-size: 0.875rem;
  height: 20px;
}

/* App Container */
.app-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  margin-bottom: 32px;
  border-radius: var(--radius-xl);
  position: sticky;
  top: 24px;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-icon {
  background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.main-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge {
  background: rgba(100, 116, 139, 0.1);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

body.dark .badge {
  background: rgba(255, 255, 255, 0.1);
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: rgba(100, 116, 139, 0.1);
}

body.dark .icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Upload Area */
.upload-area {
  padding: 40px 20px;
  text-align: center;
  margin-bottom: 32px;
  cursor: pointer;
  border: 2px dashed var(--glass-border);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--primary-color);
  background: rgba(59, 130, 246, 0.05);
  transform: translateY(-2px);
}

.upload-content {
  position: relative;
  z-index: 1;
}

.upload-icon-ring {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary-color);
  font-size: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-normal);
}

.upload-area:hover .upload-icon-ring {
  transform: scale(1.1);
  background: var(--primary-color);
  color: white;
}

.upload-area h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.upload-area p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.upload-area input {
  display: none;
}

/* Tabs */
.tabs-container {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.tabs {
  display: inline-flex;
  padding: 6px;
  border-radius: var(--radius-md);
}

.tab {
  padding: 10px 24px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab:hover {
  color: var(--text-main);
}

.tab.active {
  background: var(--bg-color);
  color: var(--text-main);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

body.dark .tab.active {
  background: rgba(255, 255, 255, 0.1);
}

/* Category Filter Pills */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.cat-pill {
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(100, 116, 139, 0.1);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cat-pill:hover {
  background: rgba(100, 116, 139, 0.2);
  color: var(--text-main);
}

.cat-pill.active {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

body.dark .cat-pill {
  background: rgba(255, 255, 255, 0.05);
}

body.dark .cat-pill.active {
  background: var(--primary-color);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Gallery Grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  padding-bottom: 60px;
}

.image-card {
  background: var(--glass-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  position: relative;
  aspect-ratio: 4/3;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  animation: fadeIn 0.5s ease-out;
}

.image-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.image-card:hover img {
  transform: scale(1.05);
}

.image-actions {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0) 50%);
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  padding: 20px 16px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.image-actions .btn {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  color: white;
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.image-actions .btn:hover {
  background: white;
  color: #000;
  transform: scale(1.1);
}

.image-actions .btn-delete:hover {
  background: var(--danger-color);
  color: white;
}

/* Modals */
.modal,
.preview-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 1;
  transition: opacity var(--transition-normal);
}

.modal.hidden,
.preview-modal.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 500px;
  padding: 0;
  overflow: hidden;
  transform: translateY(0) scale(1);
  transition: transform var(--transition-normal);
}

.modal.hidden .modal-content {
  transform: translateY(20px) scale(0.95);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.close-btn:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 24px;
}

.link-item {
  margin-bottom: 20px;
}

.link-item:last-child {
  margin-bottom: 0;
}

.link-item label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.input-with-btn {
  display: flex;
  gap: 8px;
}

.input-with-btn input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.4);
  color: var(--text-main);
  outline: none;
  font-family: monospace;
}

body.dark .input-with-btn input {
  background: rgba(0, 0, 0, 0.3);
}

/* Image Preview Modal */
.preview-modal {
  z-index: 1001;
}

.preview-close-btn {
  position: absolute;
  top: 24px;
  right: 32px;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
}

.preview-close-btn:hover {
  background: rgba(0, 0, 0, 0.8);
  transform: scale(1.1);
}

.preview-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#preview-image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  transform: scale(1);
  transition: transform var(--transition-normal);
}

.preview-modal.hidden #preview-image {
  transform: scale(0.95);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translate(-50%, 20px);
  background: var(--text-main);
  color: var(--bg-color);
  padding: 12px 24px;
  border-radius: 30px;
  font-weight: 500;
  font-size: 0.9375rem;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
  z-index: 9999;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  display: inline-block;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

body.dark .toast {
  background: var(--bg-color);
  color: var(--text-main);
}

/* Animations */
@keyframes slideUp {
  0% {
    opacity: 0;
    transform: translateY(40px);
  }

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

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

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

  .main-header {
    padding: 12px 20px;
    margin-bottom: 24px;
    top: 16px;
  }

  .main-header h1 {
    display: none;
    /* Hide text on mobile for space */
  }

  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
  }

  .image-actions {
    opacity: 1;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0) 60%);
    padding: 12px;
  }

  .image-actions .btn {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  /* Bottom Sheet Modal for Mobile */
  .modal-content {
    position: absolute;
    bottom: 0;
    width: 100%;
    max-width: 100%;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    transform: translateY(100%);
  }

  .modal:not(.hidden) .modal-content {
    transform: translateY(0);
  }

  .input-with-btn {
    flex-direction: column;
  }

  .input-with-btn .btn-primary {
    width: 100%;
  }

  .preview-close-btn {
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
}