/* ============================================
   Modern Knowledge Search Engine Styles
   ============================================ */

/* Import modern font */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");

/* Shared (non-color) variables */
:root {
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Dark Theme (default)
   ============================================ */
[data-theme="dark"] {
  --bg-body: #080808;
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-input-hover: rgba(255, 255, 255, 0.05);
  --bg-input-focus: rgba(255, 255, 255, 0.06);
  --bg-chip: rgba(255, 255, 255, 0.04);
  --bg-chip-hover: rgba(255, 255, 255, 0.08);

  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;

  --accent-primary: #10b981;
  --accent-secondary: #06d6a0;
  --accent-glow: rgba(16, 185, 129, 0.15);
  --accent-gradient: linear-gradient(135deg, #10b981 0%, #06d6a0 100%);
  --accent-border: rgba(16, 185, 129, 0.15);
  --accent-bg-subtle: rgba(16, 185, 129, 0.06);
  --accent-bg-hover: rgba(16, 185, 129, 0.1);
  --accent-bg-faint: rgba(16, 185, 129, 0.04);
  --accent-bg-match: rgba(16, 185, 129, 0.05);
  --accent-border-line: rgba(16, 185, 129, 0.12);

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-card-inset: inset 0 1px 0 rgba(255, 255, 255, 0.02);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-card-hover-ring: 0 0 0 1px rgba(16, 185, 129, 0.08);
  --shadow-card-hover-inset: inset 0 1px 0 rgba(255, 255, 255, 0.04);

  --scrollbar-thumb: rgba(255, 255, 255, 0.1);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.2);

  --card-bg: linear-gradient(
    145deg,
    rgba(12, 12, 20, 0.9),
    rgba(6, 6, 12, 0.95)
  );
  --card-bg-hover: linear-gradient(
    145deg,
    rgba(18, 18, 28, 0.95),
    rgba(10, 10, 18, 0.98)
  );
  --card-border: rgba(255, 255, 255, 0.04);
  --card-bg-mobile: linear-gradient(
    145deg,
    rgba(10, 10, 18, 0.92),
    rgba(5, 5, 10, 0.96)
  );

  --date-bg: rgba(255, 255, 255, 0.03);
  --date-bg-hover: rgba(255, 255, 255, 0.08);

  --tree-hover: rgba(255, 255, 255, 0.05);
  --tree-border: rgba(255, 255, 255, 0.04);
  --tree-doc-hover: rgba(255, 255, 255, 0.06);

  --show-more-border: rgba(255, 255, 255, 0.08);
  --show-more-hover-bg: rgba(255, 255, 255, 0.04);

  --toggle-bg: rgba(255, 255, 255, 0.06);
  --toggle-bg-hover: rgba(255, 255, 255, 0.1);

  --logo-invert: 1;
}

/* ============================================
   Light Theme
   ============================================ */
[data-theme="light"] {
  --bg-body: #f5f5f7;
  --bg-primary: #ffffff;
  --bg-secondary: #e8e8ec;
  --bg-glass: rgba(255, 255, 255, 0.8);
  --bg-input-hover: rgba(0, 0, 0, 0.03);
  --bg-input-focus: rgba(255, 255, 255, 0.95);
  --bg-chip: rgba(0, 0, 0, 0.04);
  --bg-chip-hover: rgba(0, 0, 0, 0.08);

  --text-primary: #1a1a2e;
  --text-secondary: #4a4a5a;
  --text-muted: #8a8a9a;

  --accent-primary: #059669;
  --accent-secondary: #047857;
  --accent-glow: rgba(5, 150, 105, 0.12);
  --accent-gradient: linear-gradient(135deg, #059669 0%, #047857 100%);
  --accent-border: rgba(5, 150, 105, 0.2);
  --accent-bg-subtle: rgba(5, 150, 105, 0.08);
  --accent-bg-hover: rgba(5, 150, 105, 0.12);
  --accent-bg-faint: rgba(5, 150, 105, 0.05);
  --accent-bg-match: rgba(5, 150, 105, 0.06);
  --accent-border-line: rgba(5, 150, 105, 0.2);

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

  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px var(--accent-glow);
  --shadow-card: 0 1px 4px rgba(0, 0, 0, 0.06);
  --shadow-card-inset: none;
  --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-card-hover-ring: 0 0 0 1px rgba(5, 150, 105, 0.12);
  --shadow-card-hover-inset: none;

  --scrollbar-thumb: rgba(0, 0, 0, 0.12);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.22);

  --card-bg: linear-gradient(145deg, #ffffff, #fafafa);
  --card-bg-hover: linear-gradient(145deg, #ffffff, #f5f5f5);
  --card-border: rgba(0, 0, 0, 0.06);
  --card-bg-mobile: linear-gradient(145deg, #ffffff, #fafafa);

  --date-bg: rgba(0, 0, 0, 0.03);
  --date-bg-hover: rgba(0, 0, 0, 0.06);

  --tree-hover: rgba(0, 0, 0, 0.04);
  --tree-border: rgba(0, 0, 0, 0.06);
  --tree-doc-hover: rgba(0, 0, 0, 0.04);

  --show-more-border: rgba(0, 0, 0, 0.1);
  --show-more-hover-bg: rgba(0, 0, 0, 0.03);

  --toggle-bg: rgba(0, 0, 0, 0.05);
  --toggle-bg-hover: rgba(0, 0, 0, 0.08);

  --logo-invert: 0;
}

/* ============================================
   Reset and Base
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-body);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition:
    background 0.3s ease,
    color 0.3s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}

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

/* Selection */
::selection {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

/* ============================================
   Controls Row (filters + theme toggle)
   ============================================ */

#controls-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 82px 0 12px 0;
}

#controls-row #source-filter {
  margin: 0;
}

.sort-date-toggle,
.theme-toggle,
.github-star {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-chip);
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: 50%;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  flex-shrink: 0;
  text-decoration: none;
}

.sort-date-toggle {
  margin-left: auto;
}

.sort-date-toggle.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.sort-date-toggle:hover,
.theme-toggle:hover,
.github-star:hover {
  background: var(--bg-chip-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.sort-date-toggle.active:hover {
  background: var(--accent-hover);
  color: #fff;
}

.sort-date-toggle svg,
.theme-toggle svg,
.github-star svg {
  display: block;
}

/* ============================================
   Layout
   ============================================ */

/* Folder panel (right side) */
#folder-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 50%;
  height: 100vh;
  background: var(--bg-body);
  border-left: 1px solid var(--border-subtle);
  overflow-y: auto;
  padding: 24px 20px;
  transition: background 0.3s ease;
}

/* Search content container */
#searchbox {
  width: 50%;
  float: left;
  min-height: 100vh;
  overflow-y: auto;
  padding: 24px 48px;
  box-sizing: border-box;
}

#backsearch {
  max-width: 100%;
  margin: 0;
}

/* ============================================
   Search Container
   ============================================ */

#search-container {
  position: fixed;
  width: calc(50% - 96px);
  left: 48px;
  top: 24px;
  height: 52px;
  z-index: 100;
}

#search {
  width: 100%;
  height: 100%;
  padding: 0 50px 0 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text-primary);
  font-family: "Inter", sans-serif;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.01em;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  outline: none;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

#search::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

#search:hover {
  border-color: var(--border-hover);
  background: var(--bg-input-hover);
}

#search:focus {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  background: var(--bg-input-focus);
}

/* Status Indicator */
.status-indicator {
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transition: all var(--transition-normal);
  box-shadow: 0 0 10px currentColor;
}

.status-loading {
  background-color: #f59e0b;
  animation: pulse 1.5s ease-in-out infinite;
}

.status-ready {
  background-color: #22c55e;
}

.status-error {
  background-color: #ef4444;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: translateY(-50%) scale(1);
  }
  50% {
    opacity: 0.6;
    transform: translateY(-50%) scale(0.9);
  }
}

*:focus {
  outline: none;
}

/* ============================================
   Source Filter Bar
   ============================================ */

#source-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
}

.source-chip {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  background: var(--bg-chip);
  padding: 6px 14px;
  border-radius: 20px;
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

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

.source-chip.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* ============================================
   Documents Container
   ============================================ */

#documents {
  width: 100%;
  max-width: 100%;
  margin: 0 0 40px 0;
  padding: 0;
}

/* ============================================
   Document Card
   ============================================ */

.document {
  position: relative;
  padding: 24px;
  margin-bottom: 16px;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-card), var(--shadow-card-inset);
}

.document:hover {
  background: var(--card-bg-hover);
  border-color: var(--accent-border);
  transform: translateY(-3px);
  box-shadow:
    var(--shadow-card-hover), var(--shadow-card-hover-ring),
    var(--shadow-card-hover-inset);
}

/* Title wrapper */
.title-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Logo container */
.logo {
  font-size: 1em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.85;
  transition: all var(--transition-fast);
}

.document:hover .logo {
  opacity: 1;
}

.logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: invert(var(--logo-invert));
}

/* Document title */
.document a.title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.document a.title:hover {
  color: var(--accent-secondary);
  text-decoration: none;
}

/* Date */
.date {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  margin-top: 10px;
  padding: 4px 10px;
  background: var(--date-bg);
  border-radius: var(--radius-sm);
  display: inline-block;
  transition: all var(--transition-fast);
}

.date:hover {
  background: var(--date-bg-hover);
  color: var(--text-secondary);
}

/* Summary */
.summary {
  margin-top: 14px;
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   Tags
   ============================================ */

.tags {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tag {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  background: var(--bg-chip);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.tag:hover {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* Score badges */
.score-badge {
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 600;
  flex-shrink: 0;
  align-self: center;
  letter-spacing: 0.02em;
  transition: all var(--transition-fast);
}

.retriever-score {
  color: var(--text-muted);
  background: var(--bg-chip);
  border: 1px solid var(--border-subtle);
}

.reranker-score {
  color: #fff;
  background: var(--accent-gradient);
  border: none;
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* ============================================
   Highlighting
   ============================================ */

.highlight {
  color: var(--accent-secondary);
  display: inline;
  background: transparent;
  font-weight: 500;
}

.inline {
  display: inline;
}

/* ============================================
   Folder Tree
   ============================================ */

.folder-tree {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  font-size: 13px;
  color: var(--text-secondary);
  user-select: none;
}

.folder-tree-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px 16px 8px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 12px;
}

.folder-tree-count {
  margin-left: auto;
}

.folder-tree-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.folder-tree-count {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.tree-filter-btn {
  cursor: pointer;
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-chip);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 3px 10px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tree-filter-btn:hover:not(.disabled) {
  background: var(--bg-chip-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.tree-filter-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 1px 4px var(--accent-glow);
}

.tree-filter-btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.tree-node {
  animation: treeNodeFadeIn 0.2s ease forwards;
}

.tree-header {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--transition-fast);
  border-left: 2px solid transparent;
}

.tree-header:hover {
  background: var(--tree-hover);
}

.tree-header.matching {
  border-left-color: var(--accent-primary);
  background: var(--accent-bg-subtle);
}

.tree-header.matching:hover {
  background: var(--accent-bg-hover);
}

.tree-leaf {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--transition-fast);
  border-left: 2px solid transparent;
}

.tree-leaf:hover {
  background: var(--tree-hover);
}

.tree-leaf.matching {
  border-left-color: var(--accent-primary);
  background: var(--accent-bg-faint);
}

.tree-leaf.matching:hover {
  background: var(--accent-bg-hover);
}

.tree-chevron {
  flex-shrink: 0;
  width: 16px;
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1;
}

.tree-icon {
  flex-shrink: 0;
  font-size: 13px;
  line-height: 1;
}

.tree-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.tree-name:hover {
  color: var(--accent-secondary);
}

.tree-count {
  flex-shrink: 0;
  margin-left: auto;
  padding-left: 8px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.tree-children {
  margin-left: 12px;
  padding-left: 8px;
  border-left: 1px solid var(--tree-border);
  animation: treeChildrenFadeIn 0.15s ease forwards;
}

.tree-empty {
  padding: 20px 8px;
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
}

.tree-tag-group {
  /* wrapper for tag leaf + its docs */
}

/* Inline document list under an expanded tag */
.tree-docs {
  margin-left: 28px;
  padding: 4px 0 6px 10px;
  border-left: 1px solid var(--accent-border-line);
  animation: treeChildrenFadeIn 0.15s ease forwards;
}

.tree-doc {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border-radius: 6px;
  text-decoration: none;
  transition: background var(--transition-fast);
}

.tree-doc:hover {
  background: var(--tree-doc-hover);
}

.tree-doc-logo {
  flex-shrink: 0;
  font-size: 11px;
  line-height: 1;
  opacity: 0.7;
}

.tree-doc:hover .tree-doc-logo {
  opacity: 1;
}

.tree-doc-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.tree-doc:hover .tree-doc-title {
  color: var(--accent-secondary);
}

.tree-doc-date {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  opacity: 0.7;
}

/* Matched document highlight */
.tree-doc-matched {
  background: var(--accent-bg-match);
  border-left: 2px solid var(--accent-primary);
  padding-left: 8px;
}

.tree-doc-matched .tree-doc-title {
  color: var(--text-primary);
  font-weight: 500;
}

/* Show more / show less button */
.tree-doc-show-more {
  display: block;
  width: 100%;
  padding: 6px 10px;
  margin-top: 2px;
  background: none;
  border: 1px dashed var(--show-more-border);
  border-radius: 6px;
  color: var(--text-muted);
  font-family: "Inter", sans-serif;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.tree-doc-show-more:hover {
  background: var(--show-more-hover-bg);
  border-color: var(--accent-border);
  color: var(--accent-secondary);
}

@keyframes treeNodeFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes treeChildrenFadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Responsive Styles
   ============================================ */

@media (max-width: 1200px) {
  #search-container {
    width: calc(50% - 60px);
    left: 30px;
  }

  #searchbox {
    padding: 24px;
  }
}

@media (max-width: 768px) {
  #folder-panel {
    display: none;
  }

  #searchbox {
    width: 100%;
    padding: 16px;
  }

  #backsearch {
    max-width: 100%;
  }

  #search-container {
    width: calc(100% - 32px);
    max-width: none;
    left: 16px;
    top: 16px;
    height: 48px;
  }

  #search {
    font-size: 14px;
    padding: 0 45px 0 20px;
  }

  #controls-row {
    margin-top: 76px;
  }

  #documents {
    width: 100%;
    max-width: 100%;
  }

  .document {
    padding: 20px;
    margin-bottom: 12px;
    border-radius: var(--radius-md);
    background: var(--card-bg-mobile);
  }

  .document a.title {
    font-size: 15px;
  }

  .summary {
    font-size: 13px;
  }

  .tag {
    padding: 4px 10px;
    font-size: 11px;
  }
}

@media (max-width: 480px) {
  #searchbox {
    padding: 12px;
  }

  #search-container {
    width: calc(100% - 24px);
    left: 12px;
    top: 12px;
  }

  .document {
    padding: 16px;
  }

  .title-wrapper {
    gap: 10px;
  }

  .logo {
    width: 14px;
    height: 14px;
  }
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.document {
  animation: fadeInUp 0.4s ease forwards;
}

.document:nth-child(1) {
  animation-delay: 0.02s;
}
.document:nth-child(2) {
  animation-delay: 0.04s;
}
.document:nth-child(3) {
  animation-delay: 0.06s;
}
.document:nth-child(4) {
  animation-delay: 0.08s;
}
.document:nth-child(5) {
  animation-delay: 0.1s;
}
.document:nth-child(6) {
  animation-delay: 0.12s;
}
.document:nth-child(7) {
  animation-delay: 0.14s;
}
.document:nth-child(8) {
  animation-delay: 0.16s;
}
.document:nth-child(9) {
  animation-delay: 0.18s;
}
.document:nth-child(10) {
  animation-delay: 0.2s;
}