/* =========================================================
   khodax-theme — main.css
   Dark, minimal, elegant
   ========================================================= */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS Variables --- */
:root {
  --bg:       #0d0d0f;
  --surface:  #16161a;
  --border:   #2a2a35;
  --text:     #e8e8f0;
  --muted:    #6b6b80;
  --accent:   #7c6af7;
  --accent-hover: #9585f9;
  --danger:   #f76a6a;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --radius:   8px;
  --radius-sm: 4px;
  --max-width: 720px;
  --max-width-wide: 1100px;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  --spacing-xxl: 5rem;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-hover);
}

ul, ol {
  list-style: none;
}

/* --- Layout --- */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container--wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* =========================================================
   HEADER & NAVIGATION
   ========================================================= */
.site-header {
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background-color: rgba(13, 13, 15, 0.85);
}

.site-header__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo__text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  transition: color 0.2s ease;
}

.site-logo__text:hover {
  color: var(--accent);
}

.site-logo img {
  height: 28px;
  width: auto;
}

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__link {
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"],
.site-nav__link.is-active {
  color: var(--text);
  background: var(--surface);
}

/* Active state for category links */
.site-nav__link[data-nav].is-active {
  color: var(--accent);
  background: rgba(124, 106, 247, 0.1);
}

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--text);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 4px 0;
  transition: all 0.3s ease;
  border-radius: 2px;
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--muted);
  transition: color 0.2s ease;
}

.site-footer a:hover {
  color: var(--accent);
}

.site-footer__tagline {
  margin-bottom: var(--spacing-sm);
}

.site-footer__links a {
  margin: 0 var(--spacing-sm);
}

.site-footer__copy {
  margin-top: var(--spacing-sm);
  font-size: 0.78rem;
  opacity: 0.7;
}

/* =========================================================
   HOME — POST LIST
   ========================================================= */
.page-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
}

.page-header__title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
}

.page-header__description {
  color: var(--muted);
  margin-top: var(--spacing-sm);
  font-size: 1rem;
}

/* Post Grid */
.post-feed {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

/* Post Card */
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.post-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124, 106, 247, 0.12);
}

.post-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
  text-decoration: none;
}

.post-card__image-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--border);
}

.post-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.post-card:hover .post-card__image {
  transform: scale(1.03);
}

.post-card__body {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--spacing-sm);
}

.post-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.post-card__tag {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: rgba(124, 106, 247, 0.12);
  padding: 2px 8px;
  border-radius: 99px;
}

.post-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  letter-spacing: -0.02em;
  flex: 1;
}

.post-card__excerpt {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: auto;
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--border);
}

.post-card__meta-sep {
  opacity: 0.4;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border);
}

.pagination__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color 0.2s ease, color 0.2s ease;
  text-decoration: none;
}

.pagination__btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.pagination__info {
  color: var(--muted);
  font-size: 0.85rem;
}

/* =========================================================
   LANGUAGE TOGGLE
   ========================================================= */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: var(--spacing-sm);
  padding-left: var(--spacing-sm);
  border-left: 1px solid var(--border);
}

.lang-toggle__btn {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 3px 7px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
  text-decoration: none !important;
  background: none;
}

.lang-toggle__btn:hover {
  color: var(--text) !important;
  background: var(--surface) !important;
}

.lang-toggle__btn.is-active {
  color: var(--accent) !important;
  background: rgba(124, 106, 247, 0.12) !important;
}

.lang-toggle__sep {
  color: var(--border);
  font-size: 0.75rem;
  user-select: none;
}

/* =========================================================
   CATEGORY BADGE (post header)
   ========================================================= */
.post-header__category {
  margin-bottom: var(--spacing-md);
}

.post-category-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(124, 106, 247, 0.12);
  border: 1px solid rgba(124, 106, 247, 0.25);
  padding: 3px 10px;
  border-radius: 99px;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.post-category-badge:hover {
  background: rgba(124, 106, 247, 0.2);
  color: var(--accent-hover);
}

/* =========================================================
   SINGLE POST
   ========================================================= */
.post-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

/* Post Header */
.post-header {
  margin-bottom: var(--spacing-xl);
}

.post-header__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.post-tag {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: rgba(124, 106, 247, 0.12);
  padding: 3px 10px;
  border-radius: 99px;
  border: 1px solid rgba(124, 106, 247, 0.25);
  transition: background 0.2s ease;
  text-decoration: none;
}

.post-tag:hover {
  background: rgba(124, 106, 247, 0.22);
  color: var(--accent-hover);
}

.post-header__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: var(--spacing-lg);
}

.post-header__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--muted);
}

.post-header__meta-sep {
  opacity: 0.4;
}

.post-header__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--muted);
}

.post-header__author-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}

/* Featured Image */
.post-feature-image {
  margin-bottom: var(--spacing-xl);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.post-feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* Post Content */
.post-content {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--text);
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 2.5rem 0 1rem;
  color: var(--text);
}

.post-content h1 { font-size: 2rem; }
.post-content h2 { font-size: 1.6rem; border-bottom: 1px solid var(--border); padding-bottom: 0.4em; }
.post-content h3 { font-size: 1.3rem; }
.post-content h4 { font-size: 1.1rem; }

.post-content p {
  margin: 0 0 1.5rem;
}

.post-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(124, 106, 247, 0.4);
  text-underline-offset: 3px;
}

.post-content a:hover {
  color: var(--accent-hover);
  text-decoration-color: var(--accent-hover);
}

.post-content strong {
  font-weight: 700;
  color: var(--text);
}

.post-content em {
  font-style: italic;
}

.post-content ul,
.post-content ol {
  margin: 0 0 1.5rem 1.5rem;
  list-style: revert;
}

.post-content ul li,
.post-content ol li {
  margin-bottom: 0.5rem;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--muted);
  font-style: italic;
}

.post-content blockquote p {
  margin: 0;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

.post-content img {
  border-radius: var(--radius);
  max-width: 100%;
  height: auto;
  margin: 2rem auto;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
  overflow-x: auto;
  display: block;
}

.post-content table th,
.post-content table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
}

.post-content table th {
  background: var(--surface);
  font-weight: 600;
  color: var(--text);
}

.post-content table td {
  color: var(--muted);
}

/* Code */
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.07);
}

.post-content pre {
  margin: 2rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #1e1e2e !important;
}

.post-content pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  display: block;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
}

/* Prism overrides */
pre[class*="language-"],
code[class*="language-"] {
  font-family: var(--font-mono) !important;
  font-size: 0.875rem !important;
}

/* =========================================================
   GHOST CARDS (.kg-*)
   ========================================================= */

/* Image card */
.kg-image-card {
  margin: 2rem 0;
}

.kg-image-card img,
.kg-image {
  border-radius: var(--radius);
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.kg-image-card figcaption {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  font-style: italic;
}

/* Width variants */
.kg-width-wide {
  width: 120%;
  max-width: 900px;
  margin-left: 50%;
  transform: translateX(-50%);
}

.kg-width-full {
  width: 100vw;
  max-width: none;
  margin-left: 50%;
  transform: translateX(-50%);
}

/* Gallery card */
.kg-gallery-card {
  margin: 2rem 0;
}

.kg-gallery-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.kg-gallery-row {
  display: flex;
  gap: var(--spacing-sm);
}

.kg-gallery-image {
  flex: 1;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.kg-gallery-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Bookmark card */
.kg-bookmark-card {
  margin: 2rem 0;
}

.kg-bookmark-container {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s ease;
}

.kg-bookmark-container:hover {
  border-color: var(--accent);
}

.kg-bookmark-content {
  flex: 1;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.kg-bookmark-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}

.kg-bookmark-description {
  font-size: 0.85rem;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kg-bookmark-metadata {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: auto;
}

.kg-bookmark-icon {
  width: 16px;
  height: 16px;
}

.kg-bookmark-thumbnail {
  width: 140px;
  flex-shrink: 0;
  overflow: hidden;
}

.kg-bookmark-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Embed card */
.kg-embed-card {
  margin: 2rem 0;
}

.kg-embed-card iframe {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* Video card */
.kg-video-card {
  margin: 2rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.kg-video-card video {
  width: 100%;
  display: block;
}

/* Audio card */
.kg-audio-card {
  margin: 2rem 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
}

/* Toggle card */
.kg-toggle-card {
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.kg-toggle-heading {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--surface);
  cursor: pointer;
  font-weight: 600;
}

.kg-toggle-content {
  padding: var(--spacing-lg);
}

/* Callout card */
.kg-callout-card {
  margin: 2rem 0;
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.kg-callout-emoji {
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* HR card */
.kg-divider-card {
  margin: 3rem 0;
  border: none;
  border-top: 1px solid var(--border);
}

/* =========================================================
   POST FOOTER
   ========================================================= */
.post-footer {
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border);
}

.post-footer__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xl);
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.post-nav__item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s ease;
}

.post-nav__item:hover {
  border-color: var(--accent);
}

.post-nav__item--next {
  text-align: right;
}

.post-nav__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: var(--spacing-xs);
}

.post-nav__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

/* =========================================================
   PAGE (static)
   ========================================================= */
.page-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.page-layout .post-header__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

/* =========================================================
   TAG PAGE
   ========================================================= */
.tag-header {
  max-width: var(--max-width-wide);
  margin: 0 auto var(--spacing-xl);
  padding: var(--spacing-xl) var(--spacing-lg) 0;
}

.tag-header__name {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.tag-header__name::before {
  content: '#';
  color: var(--accent);
}

.tag-header__description {
  color: var(--muted);
  margin-top: var(--spacing-sm);
  max-width: 600px;
}

.tag-header__count {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: var(--spacing-xs);
}

/* =========================================================
   AUTHOR PAGE
   ========================================================= */
.author-header {
  max-width: var(--max-width-wide);
  margin: 0 auto var(--spacing-xl);
  padding: var(--spacing-xl) var(--spacing-lg) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.author-header__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.author-header__info {}

.author-header__name {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
}

.author-header__bio {
  color: var(--muted);
  margin-top: var(--spacing-xs);
  max-width: 500px;
}

.author-header__meta {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--muted);
}

.author-header__meta a {
  color: var(--muted);
}

.author-header__meta a:hover {
  color: var(--accent);
}

/* =========================================================
   ERROR / 404 PAGE
   ========================================================= */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--spacing-xxl) var(--spacing-lg);
}

.error-page__code {
  font-size: clamp(4rem, 15vw, 8rem);
  font-weight: 900;
  color: var(--surface);
  letter-spacing: -0.05em;
  line-height: 1;
  text-shadow:
    0 0 0 2px var(--border),
    0 0 60px rgba(124, 106, 247, 0.08);
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, var(--border), var(--surface));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-page__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--spacing-md);
}

.error-page__message {
  color: var(--muted);
  max-width: 400px;
  margin-bottom: var(--spacing-xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s ease;
  text-decoration: none;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(124, 106, 247, 0.35);
}

.btn--secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

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

/* =========================================================
   UTILITY
   ========================================================= */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-muted { color: var(--muted); }
.text-accent { color: var(--accent); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 768px) {
  .site-main {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .post-feed {
    grid-template-columns: 1fr;
  }

  .post-layout,
  .page-layout {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav__item--next {
    text-align: left;
  }

  .kg-width-wide {
    width: 100%;
    margin-left: 0;
    transform: none;
  }

  .kg-width-full {
    width: calc(100% + 2rem);
    margin-left: -1rem;
    transform: none;
    border-radius: 0;
  }

  .author-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
  }

  .kg-bookmark-thumbnail {
    display: none;
  }

  /* Mobile nav */
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-xs);
    z-index: 99;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: var(--spacing-sm) var(--spacing-md);
    width: 100%;
  }
}

@media (max-width: 480px) {
  .post-header__title {
    font-size: 1.5rem;
  }

  .post-content {
    font-size: 1rem;
  }

  .site-header__inner {
    padding: 0 var(--spacing-md);
  }
}

/* =========================================================
   Tag & Author pages
   ========================================================= */

.tag-header,
.author-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl) 0;
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border);
}

.tag-header__cover {
  width: 80px;
  height: 80px;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}

.tag-header__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.4rem;
}

.tag-header__name,
.author-header__name {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.tag-header__description,
.author-header__bio {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
  max-width: 520px;
  margin-bottom: 0.5rem;
}

.tag-header__count,
.author-header__count {
  font-size: 0.85rem;
  color: var(--muted);
}

.author-header__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--border);
}

.author-header__avatar--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 2px solid var(--border);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
}

.author-header__links {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: 0.5rem;
}

.author-header__link {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
}

.author-header__link:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .tag-header,
  .author-header {
    flex-direction: column;
    align-items: flex-start;
  }
}