:root {
  --bg-color: #f9fafb;
  --sidebar-bg: #ffffff;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --border-color: #e5e7eb;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --success-color: #10b981;
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-page: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --transition-speed: 0.2s;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ========== Sidebar ========== */
.sidebar {
  width: 280px;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  z-index: 20;
}

.sidebar.hidden {
  width: 0;
  transform: translateX(-100%);
  overflow: hidden;
  border-right: none;
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.025em;
  transition: opacity var(--transition-speed);
}
.brand:hover {
  opacity: 0.8;
}

.brand i {
  color: var(--primary-color);
  font-size: 1.6rem;
}

.icon-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed);
  font-size: 1.2rem;
}

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

.sidebar-search {
  margin: 0 20px 16px;
  position: relative;
}

.sidebar-search i {
  position: absolute;
  top: 50%;
  left: 12px;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.sidebar-search input {
  width: 100%;
  padding: 10px 12px 10px 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  font-family: var(--font-family);
  font-size: 0.875rem;
  outline: none;
  transition: all var(--transition-speed);
}

.sidebar-search input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background-color: #fff;
}

.sidebar-actions {
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.primary-btn {
  width: 100%;
  padding: 12px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-speed);
  box-shadow: var(--shadow-sm);
}

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

.doc-list-container {
  flex: 1;
  overflow-y: auto;
  padding: 0 12px;
}

/* Scrollbar Customization */
.doc-list-container::-webkit-scrollbar,
.editor-container-wrapper::-webkit-scrollbar,
.homepage::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
.doc-list-container::-webkit-scrollbar-thumb,
.editor-container-wrapper::-webkit-scrollbar-thumb,
.homepage::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}
.doc-list-container::-webkit-scrollbar-track,
.editor-container-wrapper::-webkit-scrollbar-track,
.homepage::-webkit-scrollbar-track {
  background: transparent;
}

.list-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0 8px 12px;
  font-weight: 600;
}

.doc-list {
  list-style: none;
}

.doc-item {
  padding: 10px;
  border-radius: var(--radius-md);
  margin-bottom: 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-speed);
  position: relative;
  user-select: none;
}

.doc-item:hover {
  background-color: var(--bg-color);
}

.doc-item.active {
  background-color: #eff6ff;
  border-left: 3px solid var(--primary-color);
}

.doc-item.active .doc-name {
  color: var(--primary-hover);
  font-weight: 600;
}

.doc-name {
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 48px; /* space for actions */
}

.doc-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.doc-item-actions {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  gap: 2px;
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,1) 30%);
  padding-left: 10px;
}
.doc-item.active .doc-item-actions {
  background: linear-gradient(90deg, rgba(243,244,246,0) 0%, #eff6ff 30%);
}
.doc-item.active:hover .doc-item-actions {
  background: linear-gradient(90deg, rgba(243,244,246,0) 0%, #eff6ff 30%);
}
.doc-item:hover .doc-item-actions {
  display: flex;
  background: linear-gradient(90deg, rgba(243,244,246,0) 0%, var(--bg-color) 30%);
}

.action-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
}

.action-btn:hover {
  background-color: #e5e7eb;
  color: var(--text-primary);
}
.action-btn.danger-btn:hover {
  color: var(--danger-color);
  background-color: #fee2e2;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
}

.btn-import {
  width: 100%;
  background: transparent;
  border: 1px dashed var(--border-color);
  color: var(--text-secondary);
  padding: 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-speed);
}
.btn-import:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background-color: #eff6ff;
}

/* ========== Main Content Workspace ========== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--bg-color);
}

.topbar {
  height: 64px;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 10;
  flex-shrink: 0;
}

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

#show-sidebar-btn {
  margin-right: -8px;
}

.doc-title-container {
  display: flex;
  flex-direction: column;
}

.doc-title-input {
  font-family: var(--font-family);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
  border: 1px solid transparent;
  background: transparent;
  padding: 4px 6px;
  margin-left: -6px;
  border-radius: 6px;
  outline: none;
  width: 350px;
  transition: all var(--transition-speed);
}

.doc-title-input:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

.doc-title-input:focus {
  background-color: #fff;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.save-status {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  padding-left: 2px;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 2px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.document-stats {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.dot-separator {
  color: var(--text-muted);
  font-size: 12px;
}

.secondary-btn {
  background-color: #fff;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-speed);
  box-shadow: var(--shadow-sm);
}

.secondary-btn:hover {
  background-color: var(--bg-color);
  box-shadow: var(--shadow-md);
}

/* Dropdown */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background-color: #ffffff;
  min-width: 220px;
  box-shadow: var(--shadow-page);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  z-index: 100;
  padding: 8px 0;
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.dropdown-content.show {
  display: block;
}

.dropdown-content a {
  color: var(--text-primary);
  padding: 10px 16px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  transition: background-color 0.15s;
}

.dropdown-content a i {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.dropdown-content a:hover {
  background-color: var(--bg-color);
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 6px 0;
}


/* ========== Editor Area ========== */
.editor-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* ========== Homepage ========== */
.homepage {
  padding: 60px 48px;
  width: 100%;
  height: 100%;
  overflow-y: auto;
  background-color: var(--bg-color);
}

.homepage-header {
  margin-bottom: 48px;
}

.homepage-header h2 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.homepage-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: 10px;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.doc-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  cursor: pointer;
  height: 220px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.doc-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.doc-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-card-time {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.doc-card-preview {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  overflow: hidden;
  position: relative;
}

.doc-card-preview::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,1));
}


/* Override Quill Toolbar Styles to look premium */
.ql-toolbar.ql-snow {
  border: none !important;
  border-bottom: 1px solid var(--border-color) !important;
  background-color: rgba(255, 255, 255, 0.95);
  padding: 12px 24px !important;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
}

.ql-toolbar.ql-snow .ql-formats {
  margin-right: 12px !important;
  padding-right: 12px !important;
  border-right: 1px solid var(--border-color);
  display: flex;
  align-items: center;
}

.ql-toolbar.ql-snow .ql-formats:last-child {
  border-right: none;
}

.ql-snow .ql-picker {
  color: var(--text-secondary) !important;
}
.ql-snow.ql-toolbar button:hover, .ql-snow .ql-toolbar button:hover, .ql-snow.ql-toolbar button.ql-active, .ql-snow .ql-toolbar button.ql-active, .ql-snow.ql-toolbar .ql-picker-label:hover, .ql-snow .ql-toolbar .ql-picker-label:hover, .ql-snow.ql-toolbar .ql-picker-label.ql-active, .ql-snow .ql-toolbar .ql-picker-label.ql-active, .ql-snow.ql-toolbar .ql-picker-item:hover, .ql-snow .ql-toolbar .ql-picker-item:hover, .ql-snow.ql-toolbar .ql-picker-item.ql-selected, .ql-snow .ql-toolbar .ql-picker-item.ql-selected {
  color: var(--primary-color) !important;
}
.ql-snow.ql-toolbar button:hover .ql-stroke, .ql-snow .ql-toolbar button:hover .ql-stroke, .ql-snow.ql-toolbar button.ql-active .ql-stroke, .ql-snow .ql-toolbar button.ql-active .ql-stroke, .ql-snow.ql-toolbar .ql-picker-label:hover .ql-stroke, .ql-snow .ql-toolbar .ql-picker-label:hover .ql-stroke, .ql-snow.ql-toolbar .ql-picker-label.ql-active .ql-stroke, .ql-snow .ql-toolbar .ql-picker-label.ql-active .ql-stroke, .ql-snow.ql-toolbar .ql-picker-item:hover .ql-stroke, .ql-snow .ql-toolbar .ql-picker-item:hover .ql-stroke, .ql-snow.ql-toolbar .ql-picker-item.ql-selected .ql-stroke, .ql-snow .ql-toolbar .ql-picker-item.ql-selected .ql-stroke, .ql-snow.ql-toolbar button:hover .ql-stroke-miter, .ql-snow .ql-toolbar button:hover .ql-stroke-miter, .ql-snow.ql-toolbar button.ql-active .ql-stroke-miter, .ql-snow .ql-toolbar button.ql-active .ql-stroke-miter, .ql-snow.ql-toolbar .ql-picker-label:hover .ql-stroke-miter, .ql-snow .ql-toolbar .ql-picker-label:hover .ql-stroke-miter, .ql-snow.ql-toolbar .ql-picker-label.ql-active .ql-stroke-miter, .ql-snow .ql-toolbar .ql-picker-label.ql-active .ql-stroke-miter, .ql-snow.ql-toolbar .ql-picker-item:hover .ql-stroke-miter, .ql-snow .ql-toolbar .ql-picker-item:hover .ql-stroke-miter, .ql-snow.ql-toolbar .ql-picker-item.ql-selected .ql-stroke-miter, .ql-snow .ql-toolbar .ql-picker-item.ql-selected .ql-stroke-miter {
  stroke: var(--primary-color) !important;
}

.editor-container-wrapper {
  flex: 1;
  overflow-y: auto;
  padding: 40px 20px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

#editor-container {
  width: 100%;
  max-width: 820px; /* matches a standard page roughly */
  background-color: #ffffff;
  min-height: 1056px; /* 8.5 x 11 inch roughly based on 96dpi */
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-page);
  border: 1px solid var(--border-color);
  margin-bottom: 60px; /* space at bottom */
}

/* Better typography inside editor */
.ql-container.ql-snow {
  border: none !important;
}

.ql-editor {
  padding: 80px 90px !important;
  font-family: var(--font-family) !important;
  font-size: 1.05rem !important;
  line-height: 1.7 !important;
  color: #374151 !important;
}

.ql-editor p {
  margin-bottom: 1.25em;
}

.ql-editor h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
  line-height: 1.2;
}

.ql-editor h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.ql-editor h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 12px;
}

.ql-editor blockquote {
  border-left: 4px solid var(--border-color);
  padding-left: 16px;
  color: var(--text-secondary);
  font-style: italic;
  margin-left: 0;
  margin-bottom: 1.25em;
}

.ql-editor pre.ql-syntax {
  background-color: #f3f4f6 !important;
  color: #1f2937 !important;
  border-radius: var(--radius-md) !important;
  padding: 16px !important;
  border: 1px solid var(--border-color);
}

.ql-editor table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 1.5em;
}
.ql-editor td, .ql-editor th {
  border: 1px solid var(--border-color) !important;
  padding: 10px 12px;
}

.ql-editor img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  max-width: 100%;
  height: auto;
  margin: 1.5em 0;
}

/* New Extracted Mobile-Friendly Rules */
.mobile-hidden {
  display: inline;
}

@media (max-width: 768px) {
  .mobile-hidden {
    display: none !important;
  }
  .sidebar {
    position: absolute !important;
    height: 100% !important;
    z-index: 1000 !important;
    left: 0;
    width: 280px;
    max-width: 85vw;
    box-shadow: 10px 0 25px rgba(0,0,0,0.15);
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .sidebar.hidden {
    left: -100vw;
    transform: none; 
  }
  .topbar {
    padding: 0 8px;
    height: 60px;
  }
  .topbar-left {
    gap: 4px;
    width: 60%;
  }
  .topbar-right {
    gap: 8px;
  }
  #show-sidebar-btn {
    margin-right: 0;
    padding: 8px;
  }
  .doc-title-container {
    width: 100%;
  }
  .doc-title-input {
    width: 100%;
    font-size: 16px !important;
    padding: 4px;
    margin-left: 0;
  }
  .document-stats {
    display: none !important;
  }
  
  /* Make Editor take full width, no padding around paper */
  .editor-container-wrapper {
    padding: 0; 
  }
  #editor-container {
    max-width: 100%;
    width: 100%;
    min-height: 100vh;
    border-radius: 0;
    border: none;
    box-shadow: none;
    margin-bottom: 0;
  }
  .ql-editor {
    padding: 16px 16px !important;
    font-size: 16px !important;
  }
  
  /* Fix Toolbar Overflow */
  .ql-toolbar.ql-snow {
    padding: 8px !important;
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    width: 100vw !important;
    max-width: 100vw !important;
    justify-content: flex-start !important;
    box-sizing: border-box;
  }
  .ql-toolbar.ql-snow::-webkit-scrollbar {
    display: none;
  }
  .ql-toolbar.ql-snow .ql-formats {
    flex-shrink: 0 !important;
    display: inline-flex !important;
    white-space: nowrap !important;
    margin-right: 12px !important;
  }
  .ql-formats button, .ql-formats span, .ql-formats select {
    flex-shrink: 0 !important;
  }
  
  .doc-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .homepage {
    padding: 24px 16px;
  }
  .homepage-header h2 {
    font-size: 1.75rem;
  }
  .homepage-header p {
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .secondary-btn {
    padding: 6px 10px;
    font-size: 0.85rem;
  }
  .action-btn {
    padding: 8px;
  }
}

/* Extra features CSS */
.floating-exit {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--primary-color);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  z-index: 9999;
  cursor: pointer;
  border: none;
  transition: all var(--transition-speed);
}
.floating-exit:hover {
  background: var(--primary-hover);
  transform: scale(1.05);
}

.reading-progress-container {
  width: 100%;
  height: 3px;
  background: transparent;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 5;
}
.reading-progress-bar {
  height: 100%;
  background: var(--primary-color);
  width: 0%;
  transition: width 0.1s;
}