:root {
  --bg: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --text: #c9d1d9;
  --text-secondary: #8b949e;
  --accent: #58a6ff;
  --accent-emphasis: #1f6feb;
  --green: #3fb950;
  --red: #f85149;
  --danger-bg: #f8514926;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: #1f6feb66;
  color: #fff;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: #484f58; background-clip: padding-box; }

a, button, input, textarea, [tabindex] { caret-color: var(--accent); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tabular { font-variant-numeric: tabular-nums; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-left { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  display: block;
  height: 32px;
  width: auto;
}
.site-title { font-size: 16px; font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 10px; }

.badge {
  background: #2ea04326;
  color: var(--green);
  border: 1px solid #2ea04366;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
}

.btn {
  background: var(--bg-tertiary);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.08s ease;
}
.btn:hover { background: #30363d; border-color: #484f58; }
.btn:active { transform: scale(0.97); }
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.btn-primary {
  background: var(--accent-emphasis);
  border-color: var(--accent-emphasis);
  color: #fff;
}
.btn-primary:hover { background: #388bfd; border-color: #388bfd; }
.btn-danger { color: var(--red); }
.btn-danger:hover { background: var(--danger-bg); border-color: #f8514966; }

.hidden { display: none !important; }

.layout {
  display: flex;
  min-height: calc(100vh - 49px);
}

.sidebar {
  width: 260px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  padding: 16px 12px;
  overflow-y: auto;
}

.right-panel {
  width: 280px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  padding: 24px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
@media (max-width: 1100px) {
  .right-panel { display: none; }
}

.panel-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.panel-box-header h3 {
  font-size: 13px;
  font-weight: 700;
  margin: 0;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}
.btn-icon:hover { background: #30363d; color: var(--text); border-color: #484f58; }
.btn-icon:active { transform: scale(0.94); }

.panel-empty {
  color: var(--text-secondary);
  font-size: 13px;
  list-style: none;
  padding: 4px 0;
}

.popular-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: popular;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.popular-list li {
  counter-increment: popular;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.popular-list li::before {
  content: counter(popular);
  flex-shrink: 0;
  width: 16px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}
.popular-link {
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  padding: 4px 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}
.popular-link:hover { color: var(--accent); }

.notice-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.notice-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}
.notice-item-title {
  font-size: 13px;
  font-weight: 600;
}
.notice-item-detail {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}
.notice-item-time {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}
.notice-delete {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  font-size: 14px;
}

.sidebar-loading, .sidebar-empty {
  color: var(--text-secondary);
  font-size: 13px;
  padding: 8px;
}

.sidebar-category {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  margin: 16px 0 6px;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  user-select: none;
}
.sidebar-category:hover { background: var(--bg-tertiary); color: var(--text); }
.sidebar-category:focus-visible { color: var(--text); }
.sidebar-category:first-child { margin-top: 0; }
.sidebar-category[draggable="true"] { cursor: grab; }
.sidebar-category.dragging { opacity: 0.4; cursor: grabbing; }
.sidebar-category.drop-before { box-shadow: inset 0 2px 0 0 var(--accent); }
.sidebar-category.drop-after { box-shadow: inset 0 -2px 0 0 var(--accent); }

.sidebar-category .chevron {
  flex-shrink: 0;
  transition: transform 0.4s cubic-bezier(0.65, 0, 0.35, 1);
  transform: rotate(90deg);
}
.sidebar-category.collapsed .chevron { transform: rotate(0deg); }

.sidebar-group {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 0.4s cubic-bezier(0.65, 0, 0.35, 1);
}
.sidebar-group.collapsed {
  grid-template-rows: 0fr;
}
.sidebar-group-inner {
  overflow: hidden;
  min-height: 0;
  margin-left: 14px;
  padding-left: 10px;
  border-left: 1px solid var(--border);
  transition: border-color 0.2s ease;
}
.sidebar-category.active-category + .sidebar-group .sidebar-group-inner {
  border-left-color: var(--accent);
}
.sidebar-group-inner > .sidebar-link {
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.65, 0, 0.35, 1);
  opacity: 1;
  transform: translateY(0);
}
.sidebar-group.collapsed .sidebar-group-inner > .sidebar-link {
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.25s ease, transform 0.4s cubic-bezier(0.65, 0, 0.35, 1);
}

.sidebar-link {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
}
.sidebar-link:hover { background: var(--bg-tertiary); }
.sidebar-link.active {
  background: var(--bg-tertiary);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-link[draggable="true"] { cursor: grab; }
.sidebar-link.dragging { opacity: 0.4; cursor: grabbing; }
.sidebar-link.drop-before { box-shadow: inset 0 2px 0 0 var(--accent); }
.sidebar-link.drop-after { box-shadow: inset 0 -2px 0 0 var(--accent); }

.sidebar-link-root {
  margin-bottom: 2px;
}
.sidebar-link-root:last-of-type {
  margin-bottom: 16px;
}

.sidebar-category.active-category {
  color: var(--accent);
  font-weight: 800;
}

.content {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 32px 40px 64px;
}

.content-inner {
  width: 100%;
  max-width: 800px;
}

.empty-state h2 { font-size: 18px; }
.empty-state p { color: var(--text-secondary); }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 20px;
}
.page-header h1 { font-size: 26px; margin: 0; letter-spacing: -0.01em; line-height: 1.3; }
.page-description { color: var(--text-secondary); font-size: 15px; margin: 6px 0 0; }
.page-meta { color: var(--text-secondary); font-size: 12px; margin-top: 6px; font-variant-numeric: tabular-nums; }
.page-actions { display: flex; gap: 8px; }

.markdown-body {
  font-size: 15px;
  line-height: 1.7;
  max-width: 74ch;
}
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  margin-top: 28px;
  margin-bottom: 12px;
  line-height: 1.3;
}
.markdown-body p { margin: 12px 0; }
.markdown-body ul { padding-left: 24px; }
.markdown-body a { color: var(--accent); }
.markdown-body a:hover { text-decoration-thickness: 2px; }
.markdown-body code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 85%;
}
.markdown-body pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  overflow-x: auto;
}
.markdown-body blockquote {
  border-left: 3px solid var(--border);
  margin-left: 0;
  padding-left: 12px;
  color: var(--text-secondary);
}
.markdown-body table {
  border-collapse: collapse;
  width: 100%;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--border);
  padding: 6px 12px;
}
.markdown-body img {
  max-width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.page-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.page-nav-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.08s ease;
  min-width: 0;
}
.page-nav-link:hover { background: var(--bg-tertiary); border-color: #484f58; }
.page-nav-link:active { transform: scale(0.99); }
.page-nav-label {
  font-size: 12px;
  color: var(--text-secondary);
}
.page-nav-title {
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.page-nav-next {
  grid-column: 2;
  text-align: right;
  align-items: flex-end;
}
@media (max-width: 640px) {
  .page-nav { grid-template-columns: 1fr; }
  .page-nav-next { grid-column: 1; }
}

.editor {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.editor-label-sm {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: -4px;
}
.editor select,
.editor input[type="text"] {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.editor select { cursor: pointer; width: 220px; }
.editor input[type="text"]:hover,
.editor select:hover { border-color: #484f58; }
.editor input[type="text"]:focus,
.editor select:focus {
  outline: none;
  border-color: var(--accent-emphasis);
  box-shadow: 0 0 0 3px #1f6feb33;
}
.editor-title-input {
  font-size: 22px;
  font-weight: 700;
  padding: 14px 16px !important;
}
.editor-desc-input {
  color: var(--text-secondary);
}
.editor-actions-top {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
}

/* Quill dark theme */
#ed-quill { background: var(--bg-secondary); border-radius: 0 0 6px 6px; padding-left: 26px; }
.ql-toolbar.ql-snow {
  background: var(--bg-tertiary);
  border-color: var(--border) !important;
  border-radius: 6px 6px 0 0;
}
.ql-container.ql-snow {
  border-color: var(--border) !important;
  border-radius: 0 0 6px 6px;
  font-family: inherit;
  font-size: 15px;
}
.ql-editor { min-height: 400px; color: var(--text); line-height: 1.7; }
.ql-editor.ql-blank::before { color: var(--text-secondary); font-style: normal; }
.ql-snow .ql-stroke { stroke: var(--text-secondary); }
.ql-snow .ql-fill, .ql-snow .ql-stroke.ql-fill { fill: var(--text-secondary); }
.ql-snow .ql-picker { color: var(--text-secondary); }
.ql-snow .ql-picker-options {
  background: var(--bg-secondary);
  border-color: var(--border) !important;
}
.ql-snow .ql-picker-item:hover, .ql-snow .ql-picker-label:hover {
  color: var(--accent) !important;
}
.ql-snow .ql-picker-label:hover .ql-stroke,
.ql-snow .ql-toolbar button:hover .ql-stroke { stroke: var(--accent) !important; }
.ql-snow .ql-picker-label:hover .ql-fill,
.ql-snow .ql-toolbar button:hover .ql-fill { fill: var(--accent) !important; }
.ql-toolbar.ql-snow .ql-picker-label.ql-active,
.ql-toolbar.ql-snow button.ql-active {
  color: var(--accent);
}
.ql-toolbar.ql-snow .ql-picker-label.ql-active .ql-stroke,
.ql-toolbar.ql-snow button.ql-active .ql-stroke { stroke: var(--accent); }
.ql-snow .ql-tooltip {
  background: var(--bg-secondary);
  border-color: var(--border);
  color: var(--text);
  box-shadow: 0 8px 24px rgba(1, 4, 9, 0.5);
}
.ql-snow .ql-tooltip input[type="text"] {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text);
}
.ql-editor blockquote {
  border-left: 3px solid var(--border);
  color: var(--text-secondary);
}
.ql-editor pre.ql-syntax {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.ql-editor img { max-width: 100%; border-radius: 6px; }

.ql-image-block {
  margin: 12px 0;
}
.ql-image-block img {
  display: block;
  max-width: 100%;
  border-radius: 6px;
  cursor: grab;
}
.ql-image-block.ql-block-dragging img { cursor: grabbing; }

.ql-block-handle {
  position: absolute;
  left: 2px;
  width: 22px;
  height: 22px;
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1;
  cursor: grab;
  opacity: 0;
  transition: opacity 0.1s ease, background 0.1s ease;
  user-select: none;
}
.ql-block-handle.visible { display: flex; opacity: 1; }
.ql-block-handle:hover { background: var(--bg-tertiary); color: var(--text); }
.ql-block-handle:active { cursor: grabbing; }

.ql-editor > .ql-block-dragging { opacity: 0.35; }
.ql-editor > .ql-block-drop-before { box-shadow: inset 0 2px 0 0 var(--accent); }
.ql-editor > .ql-block-drop-after { box-shadow: inset 0 -2px 0 0 var(--accent); }

.ql-block-ghost {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 500;
  pointer-events: none;
  opacity: 0.9;
  background: var(--bg-secondary);
  color: var(--text);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 6px 10px;
  box-shadow: 0 8px 24px rgba(1, 4, 9, 0.5);
  font-size: 13px;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ql-block-ghost img {
  display: block;
  max-width: 100%;
  max-height: 80px;
  object-fit: cover;
  border-radius: 4px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(1, 4, 9, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: backdrop-in 0.15s ease;
}
.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  width: 340px;
  box-shadow: 0 16px 40px rgba(1, 4, 9, 0.55);
  animation: modal-in 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(6px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .modal-backdrop, .modal { animation: none; }
}
.modal h3 { margin: 0 0 6px; font-size: 16px; }
.modal-desc { color: var(--text-secondary); font-size: 13px; margin: 0 0 12px; }
.modal label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin: 10px 0 4px;
}
.modal input, .modal select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.modal input:hover, .modal select:hover { border-color: #484f58; }
.modal input:focus, .modal select:focus {
  outline: none;
  border-color: var(--accent-emphasis);
  box-shadow: 0 0 0 3px #1f6feb33;
}
.modal select { cursor: pointer; }
.modal input#np-category-new { margin-top: 8px; }
.modal-error {
  color: var(--red);
  font-size: 12px;
  margin-top: 8px;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text);
  box-shadow: 0 8px 24px rgba(1, 4, 9, 0.5);
  animation: toast-in 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 320px;
}
.toast.toast-error {
  border-color: #f8514966;
  color: #ffb3ad;
}
.toast.toast-leaving {
  animation: toast-out 0.15s ease forwards;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(8px); }
}
@media (prefers-reduced-motion: reduce) {
  .toast { animation: none; }
}