/* ==========================================================================
   KiWiki — Namuwiki-style CSS
   Inspired by Namuwiki's visual conventions for academic paper wikis
   ========================================================================== */

/* ── Variables ─────────────────────────────────────────────────────────── */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f1f3f5;
  --bg-infobox: #eaf3fb;
  --bg-infobox-head: #2563eb;
  --bg-code: #f6f8fa;
  --bg-warning: #fff8e1;
  --bg-note: #e8f5e9;
  --bg-collapsible: #f0f4ff;

  --text-primary: #1a1a1a;
  --text-secondary: #555555;
  --text-muted: #888888;
  --text-link: #1d4ed8;
  --text-link-hover: #1e40af;
  --text-infobox-head: #ffffff;

  --border-default: #dee2e6;
  --border-infobox: #93c5fd;
  --border-toc: #3b82f6;
  --border-section: #e2e8f0;

  --accent-primary: #2563eb;
  --accent-secondary: #7c3aed;
  --accent-tag: #0891b2;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.07);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-toc: 0 2px 8px rgba(37, 99, 235, 0.12);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", "Apple SD Gothic Neo", Roboto, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --content-max: 860px;
  --toc-width: 240px;
  --sidebar-gap: 24px;
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: #1a1b1e;
  --bg-secondary: #25262b;
  --bg-tertiary: #2c2d33;
  --bg-infobox: #1e2a3a;
  --bg-infobox-head: #1d4ed8;
  --bg-code: #2d2d2d;
  --bg-warning: #2a2000;
  --bg-note: #162416;
  --bg-collapsible: #1e2236;

  --text-primary: #e2e4e9;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-link: #60a5fa;
  --text-link-hover: #93c5fd;
  --text-infobox-head: #ffffff;

  --border-default: #3f4148;
  --border-infobox: #1d4ed8;
  --border-toc: #3b82f6;
  --border-section: #2d3748;

  --accent-primary: #3b82f6;
  --accent-secondary: #a78bfa;
  --accent-tag: #22d3ee;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  min-height: 100vh;
  transition:
    background 0.2s,
    color 0.2s;
}

/* ── Layout ────────────────────────────────────────────────────────────── */
.kw-site-header {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--accent-primary);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.kw-header-inner {
  max-width: calc(var(--content-max) + var(--toc-width) + var(--sidebar-gap) + 48px);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 52px;
}

.kw-site-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.kw-site-logo span {
  color: var(--accent-secondary);
}

.kw-header-search {
  flex: 1;
  max-width: 360px;
  margin-left: auto;
  display: flex;
  gap: 0;
}

.kw-header-search input {
  flex: 1;
  padding: 6px 12px;
  border: 1px solid var(--border-default);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.15s;
}

.kw-header-search input:focus {
  border-color: var(--accent-primary);
}

.kw-header-search button {
  padding: 6px 14px;
  background: var(--accent-primary);
  color: #fff;
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  cursor: pointer;
  font-size: 0.875rem;
  transition: background 0.15s;
}

.kw-header-search button:hover {
  background: var(--text-link-hover);
}

.kw-theme-toggle {
  background: none;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition:
    border-color 0.15s,
    color 0.15s;
}

.kw-theme-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ── Main content area ─────────────────────────────────────────────────── */
.kw-page-wrapper {
  max-width: calc(var(--content-max) + var(--toc-width) + var(--sidebar-gap) + 48px);
  margin: 0 auto;
  padding: 32px 24px;
  display: flex;
  gap: var(--sidebar-gap);
  align-items: flex-start;
}

.kw-article {
  flex: 1;
  min-width: 0;
  max-width: var(--content-max);
}

/* ── Article header ────────────────────────────────────────────────────── */
.kw-article-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--border-section);
}

.kw-article-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.kw-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.kw-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.kw-meta-item svg {
  width: 14px;
  height: 14px;
  opacity: 0.7;
}

.kw-article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.kw-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: 99px;
  font-size: 0.75rem;
  color: var(--accent-tag);
  text-decoration: none;
  font-weight: 500;
  transition:
    background 0.15s,
    border-color 0.15s;
}

.kw-tag:hover {
  background: var(--bg-collapsible);
  border-color: var(--accent-tag);
}

/* ── Table of Contents (sidebar) ───────────────────────────────────────── */
.kw-toc-sidebar {
  width: var(--toc-width);
  flex-shrink: 0;
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 96px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-default) transparent;
}

.kw-toc-sidebar::-webkit-scrollbar {
  width: 4px;
}
.kw-toc-sidebar::-webkit-scrollbar-thumb {
  background: var(--border-default);
  border-radius: 2px;
}

.kw-toc-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-left: 3px solid var(--border-toc);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-toc);
}

.kw-toc-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-default);
}

.kw-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.kw-toc-list li {
  margin: 0;
}

.kw-toc-list a {
  display: block;
  padding: 3px 0;
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  transition: color 0.12s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kw-toc-list a:hover {
  color: var(--text-link);
}
.kw-toc-list a.active {
  color: var(--text-link);
  font-weight: 600;
}

/* TOC depth indent */
.kw-toc-h2 {
  padding-left: 0;
}
.kw-toc-h3 {
  padding-left: 14px;
}
.kw-toc-h4 {
  padding-left: 28px;
}
.kw-toc-h5 {
  padding-left: 42px;
  font-size: 0.78rem;
}

.kw-toc-number {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-right: 5px;
  font-weight: 500;
}

/* ── Inline TOC (embedded in article) ─────────────────────────────────── */
.kw-toc-inline {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-left: 3px solid var(--border-toc);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 0 0 28px 0;
  display: inline-block;
  min-width: 240px;
  max-width: 100%;
}

.kw-toc-inline .kw-toc-title {
  cursor: pointer;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.kw-toc-inline .kw-toc-title::after {
  content: "▲";
  font-size: 0.65rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.kw-toc-inline.collapsed .kw-toc-title::after {
  content: "▼";
}

.kw-toc-inline.collapsed .kw-toc-list {
  display: none;
}

/* ── Section Headers ───────────────────────────────────────────────────── */
.kw-article h1,
.kw-article h2,
.kw-article h3,
.kw-article h4,
.kw-article h5 {
  line-height: 1.35;
  font-weight: 700;
  scroll-margin-top: 72px;
}

.kw-section-h2 {
  font-size: 1.45rem;
  margin: 36px 0 16px;
  padding: 10px 0 10px 14px;
  border-left: 4px solid var(--accent-primary);
  background: linear-gradient(90deg, var(--bg-tertiary) 0%, transparent 100%);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.kw-section-h3 {
  font-size: 1.2rem;
  margin: 28px 0 12px;
  padding: 6px 0 6px 10px;
  border-left: 3px solid var(--accent-secondary);
  color: var(--text-primary);
}

.kw-section-h4 {
  font-size: 1.05rem;
  margin: 20px 0 10px;
  padding-bottom: 4px;
  border-bottom: 1px dashed var(--border-default);
  color: var(--text-secondary);
}

.kw-section-h5 {
  font-size: 0.95rem;
  margin: 16px 0 8px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kw-section-number {
  font-size: 0.85em;
  color: var(--text-muted);
  font-weight: 500;
  margin-right: 8px;
  user-select: none;
}

/* Section anchor link */
.kw-anchor-link {
  opacity: 0;
  margin-left: 8px;
  color: var(--text-muted);
  font-size: 0.8em;
  text-decoration: none;
  transition: opacity 0.15s;
  vertical-align: middle;
}

h2:hover .kw-anchor-link,
h3:hover .kw-anchor-link,
h4:hover .kw-anchor-link {
  opacity: 1;
}

/* ── Infobox ───────────────────────────────────────────────────────────── */
.kw-infobox {
  float: right;
  clear: right;
  margin: 0 0 20px 24px;
  width: 280px;
  border: 1px solid var(--border-infobox);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: 0.84rem;
  box-shadow: var(--shadow-md);
  background: var(--bg-infobox);
}

.kw-infobox-header {
  background: var(--bg-infobox-head);
  color: var(--text-infobox-head);
  padding: 12px 16px;
  text-align: center;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.35;
}

.kw-infobox-image {
  width: 100%;
  display: block;
  border-bottom: 1px solid var(--border-infobox);
}

.kw-infobox-image img {
  width: 100%;
  display: block;
  max-height: 200px;
  object-fit: cover;
}

.kw-infobox-caption {
  font-size: 0.76rem;
  color: var(--text-muted);
  text-align: center;
  padding: 6px 12px;
  border-bottom: 1px solid var(--border-infobox);
  font-style: italic;
}

.kw-infobox-table {
  width: 100%;
  border-collapse: collapse;
}

.kw-infobox-table tr + tr td,
.kw-infobox-table tr + tr th {
  border-top: 1px solid var(--border-infobox);
}

.kw-infobox-table th {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 7px 12px;
  text-align: left;
  white-space: nowrap;
  width: 40%;
}

.kw-infobox-table td {
  padding: 7px 12px;
  color: var(--text-primary);
  word-break: break-word;
}

/* Infobox variants */
.kw-infobox.paper-info {
  border-color: #93c5fd;
}
.kw-infobox.paper-info .kw-infobox-header {
  background: #1d4ed8;
}

.kw-infobox.author-info {
  border-color: #a78bfa;
}
.kw-infobox.author-info .kw-infobox-header {
  background: #6d28d9;
}

.kw-infobox.venue-info {
  border-color: #6ee7b7;
}
.kw-infobox.venue-info .kw-infobox-header {
  background: #065f46;
}

/* ── Collapsible Blocks ────────────────────────────────────────────────── */
.kw-collapse {
  margin: 16px 0;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-primary);
}

.kw-collapse-trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: var(--bg-collapsible);
  cursor: pointer;
  user-select: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  border: none;
  width: 100%;
  text-align: left;
  transition: background 0.15s;
}

.kw-collapse-trigger:hover {
  background: var(--bg-tertiary);
}

.kw-collapse-arrow {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  flex-shrink: 0;
  transition: transform 0.25s;
}

.kw-collapse.open .kw-collapse-arrow {
  transform: rotate(180deg);
}

.kw-collapse-body {
  overflow: hidden;
  max-height: 0;
  transition:
    max-height 0.35s ease,
    padding 0.2s;
  padding: 0 16px;
}

.kw-collapse.open .kw-collapse-body {
  max-height: 9999px;
  padding: 16px;
}

/* Collapse label badge */
.kw-collapse-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  background: var(--accent-primary);
  color: #fff;
  padding: 1px 8px;
  border-radius: 99px;
  margin-right: 8px;
}

/* ── Content Typography ────────────────────────────────────────────────── */
.kw-article p {
  margin: 0 0 16px;
  color: var(--text-primary);
  line-height: 1.8;
}

.kw-article a {
  color: var(--text-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition:
    border-color 0.12s,
    color 0.12s;
}

.kw-article a:hover {
  color: var(--text-link-hover);
  border-bottom-color: var(--text-link-hover);
}

/* Internal wiki links */
.kw-wikilink {
  color: var(--text-link);
  background: linear-gradient(transparent 60%, rgba(37, 99, 235, 0.12) 60%);
}

.kw-wikilink:hover {
  background: linear-gradient(transparent 60%, rgba(37, 99, 235, 0.25) 60%);
}

/* Broken / red links */
.kw-wikilink.broken {
  color: #dc2626;
  background: linear-gradient(transparent 60%, rgba(220, 38, 38, 0.12) 60%);
}

/* External links */
.kw-extlink::after {
  content: " ↗";
  font-size: 0.75em;
  opacity: 0.6;
}

/* ── Lists ─────────────────────────────────────────────────────────────── */
.kw-article ul,
.kw-article ol {
  margin: 0 0 16px 24px;
  padding: 0;
}

.kw-article li {
  margin-bottom: 6px;
}

.kw-article ul li::marker {
  color: var(--accent-primary);
}
.kw-article ol li::marker {
  color: var(--text-muted);
  font-weight: 600;
}

/* ── Tables ────────────────────────────────────────────────────────────── */
.kw-table-wrap {
  overflow-x: auto;
  margin: 20px 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.kw-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  border: 1px solid var(--border-default);
}

.kw-table thead th {
  background: var(--bg-tertiary);
  padding: 10px 14px;
  text-align: left;
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border-default);
}

.kw-table tbody tr {
  border-bottom: 1px solid var(--border-default);
  transition: background 0.1s;
}

.kw-table tbody tr:hover {
  background: var(--bg-secondary);
}

.kw-table td {
  padding: 9px 14px;
  color: var(--text-primary);
}

/* ── Code blocks ───────────────────────────────────────────────────────── */
.kw-article code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-code);
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid var(--border-default);
  color: #c026d3;
}

[data-theme="dark"] .kw-article code {
  color: #e879f9;
}

.kw-article pre {
  background: var(--bg-code);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 16px 0;
  font-size: 0.84rem;
  line-height: 1.65;
}

.kw-article pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
  font-size: inherit;
}

/* ── Callout / Note / Warning blocks ───────────────────────────────────── */
.kw-callout {
  margin: 20px 0;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border-left: 4px solid;
  font-size: 0.9rem;
  line-height: 1.7;
}

.kw-callout-title {
  font-weight: 700;
  margin-bottom: 6px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.kw-callout.note {
  background: var(--bg-note);
  border-color: #22c55e;
}

.kw-callout.note .kw-callout-title {
  color: #16a34a;
}

.kw-callout.warning {
  background: var(--bg-warning);
  border-color: #f59e0b;
}

.kw-callout.warning .kw-callout-title {
  color: #d97706;
}

.kw-callout.info {
  background: var(--bg-infobox);
  border-color: var(--accent-primary);
}

.kw-callout.info .kw-callout-title {
  color: var(--accent-primary);
}

.kw-callout.paper-highlight {
  background: #faf5ff;
  border-color: var(--accent-secondary);
}

[data-theme="dark"] .kw-callout.paper-highlight {
  background: #1e1433;
}

.kw-callout.paper-highlight .kw-callout-title {
  color: var(--accent-secondary);
}

/* ── Blockquote ────────────────────────────────────────────────────────── */
.kw-article blockquote {
  margin: 16px 0;
  padding: 12px 20px;
  border-left: 3px solid var(--border-default);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}

/* ── Math / Formula ────────────────────────────────────────────────────── */
.kw-math-block {
  overflow-x: auto;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  text-align: center;
  margin: 16px 0;
  border: 1px solid var(--border-default);
}

.kw-math-inline {
  font-style: italic;
  color: var(--accent-secondary);
}

/* mistune math plugin output */
.kw-article .math {
  font-style: italic;
  color: var(--accent-secondary);
}

/* ── Footnotes ─────────────────────────────────────────────────────────── */
.kw-footnotes {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 2px solid var(--border-section);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.kw-footnotes-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.kw-footnote-item {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
  line-height: 1.6;
}

.kw-footnote-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-link);
  flex-shrink: 0;
  min-width: 24px;
}

sup.kw-fn-ref {
  font-size: 0.7em;
}

sup.kw-fn-ref a {
  color: var(--text-link);
  text-decoration: none;
}

/* ── Related / See Also ────────────────────────────────────────────────── */
.kw-related {
  margin-top: 36px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
}

.kw-related-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.kw-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
}

.kw-related-link {
  display: block;
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-link);
  text-decoration: none;
  transition:
    border-color 0.15s,
    background 0.15s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kw-related-link:hover {
  border-color: var(--accent-primary);
  background: var(--bg-collapsible);
}

/* ── Categories ────────────────────────────────────────────────────────── */
.kw-categories {
  margin-top: 32px;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.kw-categories-label {
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 4px;
}

.kw-category-link {
  color: var(--text-link);
  text-decoration: none;
  border-bottom: 1px dotted var(--text-link);
}

.kw-category-link:hover {
  border-bottom-style: solid;
}

/* ── Figure / Image ────────────────────────────────────────────────────── */
.kw-figure {
  margin: 20px auto;
  text-align: center;
}

.kw-figure img {
  max-width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-default);
}

.kw-figure figcaption {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-style: italic;
}

/* ── Footer ────────────────────────────────────────────────────────────── */
.kw-site-footer {
  margin-top: 60px;
  border-top: 1px solid var(--border-default);
  padding: 24px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
}

.kw-site-footer a {
  color: var(--text-link);
  text-decoration: none;
}

/* ── Index / Category page ─────────────────────────────────────────────── */
.kw-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.kw-paper-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px;
  text-decoration: none;
  color: inherit;
  transition:
    border-color 0.15s,
    box-shadow 0.15s,
    transform 0.15s;
  display: block;
}

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

.kw-paper-card-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-link);
  margin-bottom: 6px;
  line-height: 1.4;
}

.kw-paper-card-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.kw-paper-card-abstract {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Breadcrumb ────────────────────────────────────────────────────────── */
.kw-breadcrumb {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.kw-breadcrumb a {
  color: var(--text-link);
  text-decoration: none;
}
.kw-breadcrumb a:hover {
  text-decoration: underline;
}
.kw-breadcrumb-sep {
  color: var(--text-muted);
}
.kw-breadcrumb-current {
  color: var(--text-secondary);
  font-weight: 600;
}

/* ── Highlight / Citation ──────────────────────────────────────────────── */
.kw-cite {
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  font-family: var(--font-mono);
}

mark.kw-highlight {
  background: rgba(253, 224, 71, 0.4);
  color: inherit;
  border-radius: 2px;
  padding: 0 2px;
}

[data-theme="dark"] mark.kw-highlight {
  background: rgba(253, 224, 71, 0.2);
}

/* ── Divider ───────────────────────────────────────────────────────────── */
.kw-divider {
  border: none;
  border-top: 1px solid var(--border-section);
  margin: 28px 0;
}

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .kw-toc-sidebar {
    display: none;
  }
}

@media (max-width: 720px) {
  .kw-page-wrapper {
    padding: 16px;
  }
  .kw-article-title {
    font-size: 1.55rem;
  }
  .kw-infobox {
    float: none;
    width: 100%;
    margin: 0 0 20px 0;
  }
  .kw-section-h2 {
    font-size: 1.2rem;
  }
  .kw-toc-inline {
    min-width: unset;
    width: 100%;
  }
  .kw-header-search {
    display: none;
  }
  .kw-related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── Tag Cloud (tag index page) ────────────────────────────────────────── */
.kw-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-section);
  margin-bottom: 32px;
}

.kw-tag-cloud-item {
  line-height: 1.6;
  transition:
    background 0.15s,
    transform 0.1s;
}

.kw-tag-cloud-item:hover {
  transform: translateY(-1px);
}

.kw-tag-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--accent-primary);
  color: #fff;
  border-radius: 99px;
  font-size: 0.68rem;
  font-weight: 700;
  margin-left: 5px;
  vertical-align: middle;
}

/* ── Header link ──────────────────────────────────────────────────────── */
.kw-header-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s;
}

.kw-header-link:hover {
  color: var(--accent-primary);
}

/* ── Forms (submit page) ─────────────────────────────────────────────── */
.kw-form {
  margin-top: 8px;
}

.kw-form-group {
  margin-bottom: 20px;
}

.kw-form-label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.kw-form-optional {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.kw-form-input,
.kw-form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  outline: none;
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}

.kw-form-input:focus,
.kw-form-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.kw-form-textarea {
  resize: vertical;
  min-height: 72px;
  line-height: 1.6;
}

.kw-form-hint {
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.kw-form-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  color: #fff;
  background: var(--accent-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background 0.15s,
    transform 0.1s;
}

.kw-form-submit:hover {
  background: var(--text-link-hover);
}

.kw-form-submit:active {
  transform: scale(0.98);
}

.kw-form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── Admin dashboard ─────────────────────────────────────────────────── */
.kw-suggestion-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 12px;
  transition: border-color 0.15s;
}

.kw-suggestion-card:hover {
  border-color: var(--accent-primary);
}

.kw-suggestion-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.kw-suggestion-source {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.kw-suggestion-note {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.kw-suggestion-id {
  margin-top: 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.kw-suggestion-time {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.kw-suggestion-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

/* Status badges */
.kw-status-badge {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 12px;
}

.kw-status-pending {
  background: #fef3c7;
  color: #92400e;
}

[data-theme="dark"] .kw-status-pending {
  background: #451a03;
  color: #fbbf24;
}

.kw-status-accepted {
  background: #d1fae5;
  color: #065f46;
}

[data-theme="dark"] .kw-status-accepted {
  background: #064e3b;
  color: #6ee7b7;
}

.kw-status-rejected {
  background: #fee2e2;
  color: #991b1b;
}

[data-theme="dark"] .kw-status-rejected {
  background: #450a0a;
  color: #fca5a5;
}

/* Action buttons */
.kw-btn {
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    background 0.15s,
    transform 0.1s;
}

.kw-btn:active {
  transform: scale(0.97);
}

.kw-btn-accept {
  background: #059669;
  color: #fff;
}

.kw-btn-accept:hover {
  background: #047857;
}

.kw-btn-reject {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
}

.kw-btn-reject:hover {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fca5a5;
}

[data-theme="dark"] .kw-btn-reject:hover {
  background: #450a0a;
  color: #fca5a5;
  border-color: #7f1d1d;
}

/* Filter tab badge */
.kw-badge {
  display: inline-block;
  min-width: 18px;
  padding: 0 5px;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
  border-radius: 9px;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  margin-left: 4px;
}

.kw-filter-tab.active .kw-badge {
  background: var(--accent-primary);
  color: #fff;
}

.kw-filter-tab {
  cursor: pointer;
  border: 1px solid var(--border-default);
  background: var(--bg-secondary);
  transition:
    background 0.15s,
    border-color 0.15s;
}

.kw-filter-tab.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

/* ── Print ─────────────────────────────────────────────────────────────── */
/* Strikethrough (취소선 유머) */
.kw-article del {
  color: #888;
  text-decoration: line-through;
  opacity: 0.7;
}

@media print {
  .kw-site-header,
  .kw-toc-sidebar,
  .kw-theme-toggle,
  .kw-categories,
  .kw-site-footer {
    display: none;
  }
  .kw-article {
    max-width: 100%;
  }
  .kw-collapse-body {
    max-height: none !important;
    padding: 16px !important;
  }
  a {
    color: inherit;
    text-decoration: underline;
  }
}