/* ============================================
   FileVault — Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: rgba(0, 0, 0, 0.02);
  --bg-card-hover: rgba(0, 0, 0, 0.04);
  --bg-glass: rgba(255, 255, 255, 0.88);

  --text-primary: #1e293b;
  --text-secondary: rgba(30, 41, 59, 0.6);
  --text-muted: rgba(30, 41, 59, 0.35);

  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.2);
  --accent-gradient: linear-gradient(135deg, #3b82f6, #f9a8d4);

  --pink: #f9a8d4;
  --pink-glow: rgba(249, 168, 212, 0.25);

  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.12);
  --success: #22c55e;
  --success-glow: rgba(34, 197, 94, 0.12);

  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px var(--accent-glow);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.25s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Animated Background Orbs --- */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.25;
  animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #93c5fd, transparent);
  top: -150px;
  right: -100px;
  animation-duration: 25s;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #f9a8d4, transparent);
  bottom: -100px;
  left: -80px;
  animation-duration: 30s;
  animation-delay: -5s;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #bfdbfe, transparent);
  top: 40%;
  left: 50%;
  animation-duration: 22s;
  animation-delay: -10s;
  opacity: 0.15;
}

@keyframes orbFloat {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  25% {
    transform: translate(40px, -30px) scale(1.05);
  }

  50% {
    transform: translate(-20px, 40px) scale(0.95);
  }

  75% {
    transform: translate(30px, 20px) scale(1.02);
  }
}

/* --- Header --- */
#main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  display: flex;
  transition: transform var(--duration) var(--ease-spring);
}

.logo:hover .logo-icon {
  transform: rotate(-8deg) scale(1.05);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
}

.header-stats {
  display: flex;
  gap: var(--space-lg);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.stat-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Main Content --- */
#main-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

/* --- Upload Section --- */
.upload-section {
  margin-bottom: var(--space-xl);
}

.upload-zone {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
  background: var(--bg-card);
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
}

.upload-zone:hover,
.upload-zone:focus-visible {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.upload-zone:hover::before {
  opacity: 0.04;
}

.upload-zone.drag-over {
  border-color: var(--accent-light);
  background: rgba(59, 130, 246, 0.06);
  transform: translateY(-4px) scale(1.005);
  box-shadow: var(--shadow-glow), 0 0 80px var(--accent-glow);
}

.upload-zone.drag-over::before {
  opacity: 0.08;
}

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

.upload-icon {
  color: var(--accent-light);
  margin-bottom: var(--space-md);
  transition: transform 0.4s var(--ease-spring);
}

.upload-zone:hover .upload-icon {
  transform: translateY(-4px);
}

.upload-zone.drag-over .upload-icon {
  transform: translateY(-8px) scale(1.1);
}

.upload-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.upload-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Upload Progress */
.upload-progress-area {
  margin-top: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  animation: slideDown 0.3s var(--ease-out);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

.progress-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.progress-percent {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-light);
  font-variant-numeric: tabular-nums;
}

.progress-bar-track {
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: width 0.3s var(--ease-out);
  box-shadow: 0 0 12px var(--accent-glow);
}

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

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

/* --- Controls Section --- */
.controls-section {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  margin-bottom: var(--space-lg);
}

.search-wrapper {
  flex: 1;
  position: relative;
}

.search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md) var(--space-sm) calc(var(--space-md) + 26px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
  outline: none;
  transition: all var(--duration) var(--ease-out);
}

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

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-card-hover);
}

.view-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.view-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 32px;
  border: none;
  background: transparent;
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
}

.view-btn:hover {
  color: var(--text-secondary);
}

.view-btn.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* --- Files Grid --- */
.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
}

.files-grid.list-view {
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

/* --- File Card --- */
.file-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
  animation: fadeInUp 0.4s var(--ease-out) backwards;
}

.file-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(59, 130, 246, 0.06);
}

.file-card:active {
  transform: translateY(-2px) scale(0.99);
}

.file-preview {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.file-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease-out);
}

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

.file-type-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 6px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.file-type-icon {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
}

.file-info {
  padding: var(--space-md);
}

.file-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: var(--space-xs);
}

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

.file-size {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.file-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.file-actions {
  display: flex;
  gap: var(--space-xs);
  padding: 0 var(--space-md) var(--space-md);
  opacity: 0;
  transform: translateY(4px);
  transition: all var(--duration) var(--ease-out);
}

.file-card:hover .file-actions {
  opacity: 1;
  transform: translateY(0);
}

.file-action-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
}

.file-action-btn:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: var(--accent-glow);
}

.file-action-btn.delete:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-glow);
}

/* List view file card */
.list-view .file-card {
  display: flex;
  align-items: center;
  border-radius: var(--radius-md);
}

.list-view .file-card:hover {
  transform: translateX(4px) translateY(0);
}

.list-view .file-preview {
  width: 56px;
  min-width: 56px;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  margin: var(--space-sm);
}

.list-view .file-type-badge {
  display: none;
}

.list-view .file-info {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  min-width: 0;
}

.list-view .file-actions {
  opacity: 1;
  transform: none;
  padding: var(--space-sm) var(--space-md);
  flex-shrink: 0;
}

/* --- Empty State --- */
.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  color: var(--text-muted);
}

.empty-state.visible {
  display: flex;
}

.empty-icon {
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.empty-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* --- Preview Modal (using <dialog>) --- */
.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  width: 100%;
  max-width: 100%;
  height: 100%;
  max-height: 100%;
  border: none;
  padding: 0;
  background: transparent;
  overflow: hidden;
}

.preview-modal::backdrop {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1;
  width: min(90vw, 800px);
  max-height: 85vh;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 60px rgba(59, 130, 246, 0.08);
  animation: modalIn 0.35s var(--ease-spring);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.92);
  }

  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

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

.modal-title {
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-right: var(--space-md);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-card);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--duration) var(--ease-out);
}

.modal-close:hover {
  background: var(--danger-glow);
  color: var(--danger);
}

.modal-body {
  flex: 1;
  padding: var(--space-lg);
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.modal-body img {
  max-width: 100%;
  max-height: 60vh;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.modal-body video {
  max-width: 100%;
  max-height: 60vh;
  border-radius: var(--radius-md);
}

.modal-body audio {
  width: 100%;
}

.modal-body .no-preview {
  text-align: center;
  color: var(--text-muted);
  padding: var(--space-2xl);
}

.modal-body .no-preview svg {
  margin-bottom: var(--space-md);
  opacity: 0.4;
}

.modal-body .no-preview p {
  font-size: 0.875rem;
}

.modal-footer {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration) var(--ease-out);
}

.btn:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  border-color: var(--accent);
  color: var(--accent-light);
}

.btn-secondary:hover {
  background: var(--accent-glow);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-danger {
  border-color: var(--danger);
  color: var(--danger);
}

.btn-danger:hover {
  background: var(--danger-glow);
  box-shadow: 0 0 20px var(--danger-glow);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastIn 0.4s var(--ease-spring);
  max-width: 360px;
}

.toast.success {
  border-color: rgba(34, 197, 94, 0.3);
}

.toast.error {
  border-color: rgba(239, 68, 68, 0.3);
}

.toast-icon {
  flex-shrink: 0;
}

.toast-icon.success {
  color: var(--success);
}

.toast-icon.error {
  color: var(--danger);
}

.toast.exiting {
  animation: toastOut 0.3s var(--ease-out) forwards;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(30px) scale(0.95);
  }

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

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateX(30px) scale(0.95);
  }
}

/* --- Stagger animations for file cards --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

/* --- Confirm Dialog --- */
.confirm-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s var(--ease-out);
}

.confirm-dialog {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  max-width: 380px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s var(--ease-spring);
}

.confirm-dialog h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.confirm-dialog p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.confirm-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

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

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

::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.12);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.22);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .header-inner {
    padding: var(--space-sm) var(--space-md);
  }

  .header-stats {
    gap: var(--space-md);
  }

  #main-content {
    padding: var(--space-md) var(--space-md) var(--space-xl);
  }

  .upload-zone {
    padding: var(--space-xl) var(--space-md);
  }

  .files-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-sm);
  }

  .controls-section {
    flex-wrap: wrap;
  }

  .search-wrapper {
    min-width: 100%;
  }

  .modal-content {
    width: 95vw;
    max-height: 90vh;
  }

  .toast-container {
    bottom: var(--space-md);
    right: var(--space-md);
    left: var(--space-md);
  }

  .toast {
    max-width: 100%;
  }
}

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

  .file-actions {
    opacity: 1;
    transform: none;
  }
}