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

/* ── Fonts ── */
@font-face {
  font-family: 'Atkinson Hyperlegible Next';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/regular.ttf') format('truetype');
}
@font-face {
  font-family: 'Atkinson Hyperlegible Next';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/bold.ttf') format('truetype');
}
@font-face {
  font-family: 'Atkinson Hyperlegible Next';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/italic.ttf') format('truetype');
}
@font-face {
  font-family: 'Atkinson Hyperlegible Next';
  font-style: italic;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/bold-italic.ttf') format('truetype');
}

/* ── Theme ── */
:root {
  --font: "Atkinson Hyperlegible Next", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

[data-theme="dark"] {
  --bg: #1a1a1a;
  --bg-code: #242424;
  --text: #c8c8c8;
  --text-heading: #e8e8e8;
  --text-muted: #777;
  --link: #d79921;
  --link-hover: #fabd2f;
  --border: #2e2e2e;
  --toggle-icon: "☀";
  --stars: url('../images/stars-dark.svg');
}

[data-theme="light"] {
  --bg: #fafafa;
  --bg-code: #f0f0f0;
  --text: #333;
  --text-heading: #111;
  --text-muted: #888;
  --link: #b57614;
  --link-hover: #8f5e0a;
  --border: #ddd;
  --toggle-icon: "●";
  --stars: url('../images/stars-light.svg');
}

/* ── Base ── */
html {
  font-size: 20px;
  line-height: 1.7;
  background: var(--bg) var(--stars) repeat;
  background-size: 600px 600px;
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--link);
  text-decoration: none;
}
a:hover {
  color: var(--link-hover);
}

/* ── Layout ── */
.container {
  max-width: 660px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ── Header ── */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.site-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.02em;
}
.site-title-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6em;
  height: 1.6em;
  background: var(--link);
  color: var(--bg);
  border-radius: 0.3em;
  font-size: 1.15em;
  font-weight: 700;
  margin-right: 0.15em;
  vertical-align: baseline;
  line-height: 1;
}
.site-title:hover {
  color: var(--link);
}
.glitch-text {
  display: inline-block;
  min-width: 3.2em;
  font-family: var(--font-mono);
  font-size: 0.9em;
  letter-spacing: 0.02em;
}

nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.2rem;
  font-size: 0.9rem;
}

nav a {
  color: var(--text-muted);
}
nav a:hover {
  color: var(--text-heading);
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 0;
  line-height: 1;
}
.theme-toggle:hover {
  color: var(--text-heading);
}
.theme-icon::after {
  content: var(--toggle-icon);
}

/* ── Home sidebar ── */
.home-sidebar {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.home-aside-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.home-aside-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.home-aside-link {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.home-aside-link:hover {
  color: var(--link);
}

.home-aside-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.4rem 0;
  color: var(--text);
  text-decoration: none;
}

.home-aside-item:hover .home-aside-item-title {
  color: var(--link);
}

.home-aside-cover {
  width: 36px;
  height: 54px;
  object-fit: cover;
  border-radius: 3px;
  flex-shrink: 0;
}

.home-aside-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.home-aside-item-title {
  font-size: 0.9rem;
  color: var(--text-heading);
  transition: color 0.15s;
}

.home-aside-item-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── Post list (home) ── */
.post-list {
  list-style: none;
}

.post-list li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 5.8rem;
}

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

/* ── Post ── */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  font-size: 1.8rem;
  line-height: 1.3;
  color: var(--text-heading);
  margin-bottom: 0.3rem;
}

.post-header time {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.post-updated {
  margin-left: 0.3rem;
}

.page-updated {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.post-content h2 {
  font-size: 1.3rem;
  color: var(--text-heading);
  margin: 2rem 0 0.8rem;
  scroll-margin-top: 3rem;
}

.post-content h3 {
  font-size: 1.1rem;
  color: var(--text-heading);
  margin: 1.5rem 0 0.6rem;
  scroll-margin-top: 3rem;
}

.post-content p {
  margin-bottom: 1.2rem;
}

.post-content ul, .post-content ol {
  margin: 0 0 1.2rem 1.5rem;
}

.post-content li {
  margin-bottom: 0.3rem;
}

.post-content blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--text-muted);
  margin: 1.2rem 0;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-code);
  padding: 0.15em 0.35em;
  border-radius: 3px;
}

.post-content pre {
  background: var(--bg-code);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: 1.2rem;
  line-height: 1.5;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content img {
  max-width: 100%;
  border-radius: 4px;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ── Page ── */
.page h1 {
  font-size: 1.8rem;
  color: var(--text-heading);
  margin-bottom: 1.5rem;
}

.page h2 {
  font-size: 1.3rem;
  color: var(--text-heading);
  margin: 2rem 0 0.8rem;
  scroll-margin-top: 3rem;
}

.page h3 {
  font-size: 1.1rem;
  color: var(--text-heading);
  margin: 1.5rem 0 0.6rem;
  scroll-margin-top: 3rem;
}

.page p {
  margin-bottom: 1.2rem;
}

.page ul, .page ol {
  margin: 0 0 1.2rem 1.2rem;
  padding-left: 0;
}

.page li {
  margin-bottom: 0.3rem;
}

.profile-img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  float: right;
  margin: 0 0 1rem 1.5rem;
}

.about-figure {
  margin: 1.5rem 0 1.8rem;
  max-width: 360px;
}

.about-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
  display: block;
}

.about-figure img[src$=".png"] {
  background: var(--bg-code);
  object-fit: contain;
  padding: 0.8rem;
}

.about-figure figcaption {
  font-size: 0.65rem;
  font-style: italic;
  color: var(--text-muted);
  margin-top: 0.3rem;
  line-height: 1.4;
  opacity: 0.7;
}

.about-figure figcaption a {
  color: var(--text-muted);
  text-decoration: underline;
}

.about-figure-right {
  float: right;
  margin: 0.2rem 0 1rem 1.5rem;
}

.about-figure-left {
  float: left;
  margin: 0.2rem 1.5rem 1rem 0;
}

.about-figure-center {
  margin-left: auto;
  margin-right: auto;
  clear: both;
}

/* ── Archive ── */
.archive-year {
  font-size: 1.2rem;
  color: var(--text-heading);
  margin: 2rem 0 0.8rem;
}

/* ── Footer ── */
.site-footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem;
}

.footer-disclaimer,
.footer-license {
  width: 100%;
  font-style: italic;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-muted);
}
.footer-links a:hover {
  color: var(--text-heading);
}

/* ── 404 ── */
.error-page {
  text-align: center;
  padding: 2rem 0;
}

.error-page h1 {
  font-size: 3rem;
  color: var(--text-heading);
  margin-bottom: 0.5rem;
}

.error-page p {
  margin-bottom: 1rem;
}

.black-hole {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 2rem;
}

.accretion-disk {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--link) 0%,
    transparent 20%,
    var(--link) 40%,
    transparent 60%,
    var(--link) 80%,
    transparent 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  animation: spin 8s linear infinite;
  opacity: 0.7;
}

.event-horizon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: #000;
  box-shadow: 0 0 40px 20px rgba(0, 0, 0, 0.8);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Books ── */
.review-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
}

.book-detail {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.review-cover {
  max-width: 160px;
  height: auto;
  border-radius: 4px;
  flex-shrink: 0;
}

.book-info {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.book-info-item {
  display: block;
}

.book-subjects {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.3rem;
}

.book-subject {
  font-size: 0.75rem;
  background: var(--bg-code);
  padding: 0.15em 0.5em;
  border-radius: 3px;
}

.book-description {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-style: italic;
}

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

.review-list li {
  margin-bottom: 1rem;
}

.review-title {
  font-size: 1rem;
  display: block;
}

.review-list-meta {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  display: block;
}

.book-list {
  list-style: none;
  margin-bottom: 1.5rem;
}

.book-list li {
  margin-bottom: 0.4rem;
}

.book-list-author {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.book-search {
  width: 100%;
  padding: 0.4em 0.8em;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text);
  background: none;
  border: 1px solid var(--border);
  border-radius: 3px;
  margin-bottom: 1rem;
  outline: none;
}
.book-search:hover {
  border-color: var(--text-muted);
}
.book-search:focus {
  color: var(--link);
  border-color: var(--link);
}
.book-search::placeholder {
  color: var(--text-muted);
}

.book-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.book-filter {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.3em 0.8em;
  border-radius: 3px;
  cursor: pointer;
}

.book-filter:hover {
  color: var(--text-heading);
  border-color: var(--text-muted);
}

.book-filter.active {
  color: var(--link);
  border-color: var(--link);
}

.review-badge {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--link);
  border: 1px solid var(--link);
  padding: 0.05em 0.4em;
  border-radius: 3px;
  align-self: flex-start;
}

.now-reading-badge {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--link);
  border: 1px solid var(--link);
  padding: 0.05em 0.4em;
  border-radius: 3px;
}

.book-bits {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.book-shelf {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.book-card {
  display: flex;
  gap: 1rem;
  color: var(--text);
  text-decoration: none;
  padding: 0.8rem;
  border-radius: 6px;
  transition: background 0.15s;
}

.book-card:hover {
  background: var(--bg-code);
  color: var(--text);
}

.book-card-cover {
  width: 60px;
  height: 90px;
  object-fit: cover;
  border-radius: 3px;
  flex-shrink: 0;
}

.book-card-no-cover {
  background: var(--bg-code);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-align: center;
  padding: 0.3rem;
  line-height: 1.3;
}

.book-card-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.book-card-title {
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
}

.book-card-author {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.book-card-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0.2rem 0 0;
}

/* ── Bits ── */
.bit-filters {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.bit-filter {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.3em 0.8em;
  border-radius: 3px;
  cursor: pointer;
}

.bit-filter:hover {
  color: var(--text-heading);
  border-color: var(--text-muted);
}

.bit-filter.active {
  color: var(--link);
  border-color: var(--link);
}

.bit-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.bit-card {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  color: var(--text);
  text-decoration: none;
  padding: 0.8rem;
  border-radius: 6px;
  transition: background 0.15s;
}

.bit-card:hover {
  background: var(--bg-code);
  color: var(--text);
}

.bit-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.bit-card-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.bit-card-title {
  font-weight: 700;
  color: var(--text-heading);
  font-size: 1.05rem;
}

.bit-card-source {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

.bit-card-body {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.bit-type-badge {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  padding: 0.05em 0.4em;
  border-radius: 3px;
  align-self: flex-start;
}

.bit-type-term {
  color: var(--link);
  border: 1px solid var(--link);
}

.bit-type-quote {
  color: var(--text-muted);
  border: 1px solid var(--text-muted);
}

.bit-type-thought {
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.bit-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.bit-book-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* ── Table of Contents ── */
.toc-nav {
  margin-bottom: 2rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

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

.toc-link {
  display: block;
  padding: 0.3em 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  line-height: 1.5;
  transition: color 0.15s;
}

.toc-link:hover {
  color: var(--text-heading);
}

.toc-link.active {
  color: var(--link);
}

.toc-link[data-level="3"] {
  padding-left: 1rem;
  font-size: 0.82rem;
}

/* Sticky bar (mobile/tablet) */
.toc-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transform: translateY(-100%);
  transition: transform 0.2s ease;
}

.toc-bar.visible {
  transform: translateY(0);
}

.toc-bar-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.5rem 1.5rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.82rem;
  cursor: pointer;
  text-align: left;
}

.toc-bar-section {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toc-bar-toggle::after {
  content: '▾';
  font-size: 0.65rem;
  margin-left: 0.5rem;
  transition: transform 0.2s;
}

.toc-bar.open .toc-bar-toggle::after {
  transform: rotate(180deg);
}

.toc-bar-dropdown {
  display: none;
  padding: 0 1.5rem 0.6rem;
  max-height: 60vh;
  overflow-y: auto;
}

.toc-bar.open .toc-bar-dropdown {
  display: block;
}

.toc-bar-dropdown .toc-link {
  padding: 0.25em 0;
  font-size: 0.82rem;
}

.toc-bar-dropdown .toc-link[data-level="3"] {
  font-size: 0.78rem;
}

/* Heading anchors */
.heading-anchor {
  color: var(--text-muted);
  text-decoration: none;
  margin-right: 0.3em;
  margin-left: -1.1em;
  opacity: 0;
  transition: opacity 0.15s;
  font-weight: 400;
}

.post-content h2:hover .heading-anchor,
.post-content h3:hover .heading-anchor,
.page h2:hover .heading-anchor,
.page h3:hover .heading-anchor {
  opacity: 0.4;
}

.heading-anchor:hover {
  opacity: 1 !important;
  color: var(--link);
}

/* Desktop sidebar: positioned in left margin of centered .container (max-width: 660px).
   right = 50% + half-container(330px) + gap(15px) = calc(50% + 345px).
   min-width = 2 * (330 + 15 + 200) = 1090px, rounded to 1100px. */
@media (min-width: 1100px) {
  .toc-nav {
    position: fixed;
    top: 10rem;
    right: calc(50% + 345px);
    width: 200px;
    max-height: calc(100vh - 12rem);
    overflow-y: auto;
    margin-bottom: 0;
    border-top: none;
    padding-top: 0;
  }

  .toc-link {
    font-size: 0.82rem;
    padding: 0.2em 0;
  }

  .toc-link[data-level="3"] {
    font-size: 0.78rem;
  }

  .toc-bar {
    display: none;
  }
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    gap: 0.5rem;
  }
  nav {
    gap: 0.8rem;
    font-size: 0.85rem;
  }
  .review-cover {
    max-width: 120px;
  }
  .post-list li {
    flex-direction: column;
    gap: 0;
    margin-bottom: 1rem;
  }
  .about-figure {
    float: none !important;
    margin: 1.2rem auto !important;
    max-width: 100%;
  }
  .heading-anchor {
    float: right;
    margin-left: 0.3em;
    margin-right: 0;
    opacity: 0.3;
  }
}

@media (max-width: 400px) {
  nav {
    gap: 0.6rem;
    font-size: 0.8rem;
  }
  .review-cover {
    max-width: 100px;
  }
}