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

:root {
  --bg: #f5f2eb;
  --bg-alt: #ebe6db;
  --text: #3d3a35;
  --text-muted: #6b6560;
  --accent: #8b7355;
  --accent-light: #a69478;
  --border: #d4cfc4;
  --sidebar-bg: #ebe6db;
  --phi: 1.618;
  --border-radius: calc(var(--phi) * 1rem);
}

@font-face {
  font-family: "Lora";
  src: url("/static/fonts/lora-v20-vietnamese_latin-ext_latin_cyrillic-ext_cyrillic-regular.woff2") format("woff2"),
       url("/static/fonts/lora-v20-vietnamese_latin-ext_latin_cyrillic-ext_cyrillic-regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

body {
  font-family: "Lora", Georgia, "Times New Roman", serif;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  background-image:
    linear-gradient(rgba(245, 242, 235, 0.3), rgba(245, 242, 235, 0.3)),
    url("/static/images/wabi-sabi-bg.webp");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  max-width: 61.8vw;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

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

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

header {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

header a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

header a:hover {
  color: var(--text);
}

.rss-link {
  display: flex;
  align-items: center;
  color: var(--accent);
}

.rss-link:hover {
  color: var(--accent-light);
}

h1 {
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.3rem;
  font-weight: 400;
  margin: 2rem 0 0.75rem;
  color: var(--text);
}

h3 {
  font-size: 1.1rem;
  font-weight: 400;
  margin: 1.5rem 0 0.5rem;
  color: var(--text);
}

article {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

article:last-child {
  border-bottom: none;
}

.meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin-bottom: 0.5rem;
}

.summary {
  color: var(--text);
  margin: 0.75rem 0;
  font-size: 1.05rem;
}

.tags {
  margin-top: 1rem;
}

.tags a {
  color: var(--text-muted);
  margin-right: 0.75rem;
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-alt);
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
}

.sidebar {
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  border: 2px solid var(--sidebar-bg);;
}

.sidebar h3 {
  margin-top: 0;
  font-size: 1rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
}

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

.book-list li {
  margin-bottom: 0.75rem;
}

.book-list a {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
}

footer {
  margin-top: 4rem;
  padding-top: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.content {
  margin-top: 1.5rem;
  font-size: 1.05rem;
}

.content p {
  margin-bottom: 1.25rem;
}

.content h2 {
  margin-top: 2.5rem;
}

.content h3 {
  margin-top: 2rem;
}

.content blockquote {
  border-left: 2px solid var(--border);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-style: italic;
}

.content code {
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.9em;
  background: var(--bg-alt);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

.content pre {
  background: var(--bg-alt);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

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

.content strong {
  font-weight: 600;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background: var(--bg-alt);
  padding: 0.35rem 0.75rem;
  border-radius: 3px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tag .count {
  font-size: 0.75rem;
  opacity: 0.7;
}

@media (min-width: 700px) {
  .layout {
    display: flex;
    gap: 2.5rem;
  }
  .main {
    flex: 3;
  }
  .sidebar {
    flex: 1;
    min-width: 200px;
  }
}

@media (max-width: 699px) {
  header {
    gap: 1rem;
  }
  body {
    padding: 2rem 1rem;
  }
}

.content .sidenote {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: transparent;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  display: inline;
}

.content .sidenote-number {
  vertical-align: super;
  font-size: 0.75em;
  margin-left: 0.2em;
  cursor: pointer;
  color: var(--accent);
}

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 12px;
  object-fit: cover;
  margin-bottom: 1rem;
  border: 2px solid var(--border);
}

.avatar-large {
  width: 180px;
  height: 180px;
}

.avatar-centered {
  display: block;
  margin: 0 auto 1.5rem;
}

.centered-layout {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.centered-layout > h1 {
  margin-bottom: 2rem;
}

.centered-layout > div {
  text-align: left;
}

.centered-layout > div > p {
  margin-bottom: 1.25rem;
}

.sidebar .avatar {
  display: block;
  margin: 0 auto 1rem;
  width: 100px;
  height: 100px;
}


@media (min-width: 900px) {
  .content .sidenote {
    float: right;
    clear: right;
    width: 180px;
    margin-right: -200px;
    margin-bottom: 1rem;
    font-size: 0.8rem;
    line-height: 1.5;
  }
}

.projects-section {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding-top: 2rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-alt);
  border-radius: var(--border-radius);
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border);
}

.project-card h3 {
  font-size: 1.15rem;
  margin-top: 0.75rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.project-card .summary {
  font-size: 0.95rem;
  margin: 0.5rem 0;
}

.project-card .tags span {
  color: var(--text-muted);
  margin-right: 0.75rem;
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
}

.section-footer {
  margin-top: 1.5rem;
  text-align: right;
}

.section-footer a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
}

/* Bookshelf */
.shelf-section {
  margin-bottom: 3rem;
}

.shelf-header {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 1rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-muted);
}

.shelf-books {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  padding-bottom: 1rem;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 170px,
    #ded4c0 170px,
    #d4c8b4 calc(170px + 14px),
    transparent calc(170px + 14px),
    transparent calc(170px + 1rem)
  );
}

.book-rating {
  color: #d4a017;
  font-size: 0.85rem;
  letter-spacing: 2px;
}

.spine-stripe {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(to bottom,
    rgba(255,255,255,0.15) 0%,
    rgba(255,255,255,0) 40%,
    rgba(0,0,0,0.12) 100%
  ), var(--stripe-color);
  border-radius: 3px 3px 0 0;
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
  z-index: 1;
}

.shelf-group-header {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 0.2rem 0.7rem;
  margin: 0 0 0.75rem 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #8a7a64;
  background: #e8ddd0;
  border: 1px solid #d0c4b0;
  border-radius: 2px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.5),
    0 1px 2px rgba(120,105,85,0.12);
}

.spine-tooltip-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.15rem;
}

/* Bookcase (spine display) */
.bookcase {
  background:
    radial-gradient(ellipse 85% 20% at 50% 0%, rgba(180,165,140,0.06), transparent 70%),
    repeating-linear-gradient(
      87deg,
      transparent 0px, transparent 6px,
      rgba(160,145,125,0.035) 6px, rgba(160,145,125,0.035) 6.4px,
      transparent 6.4px, transparent 14px,
      rgba(255,255,255,0.025) 14px, rgba(255,255,255,0.025) 14.3px,
      transparent 14.3px, transparent 25px,
      rgba(160,145,125,0.025) 25px, rgba(160,145,125,0.025) 25.3px,
      transparent 25.3px, transparent 35px,
      rgba(255,255,255,0.015) 35px, rgba(255,255,255,0.015) 35.3px,
      transparent 35.3px, transparent 45px
    ),
    linear-gradient(180deg, #f2ecde, #ece4d4);
  border: 1px solid #d4ccba;
  border-radius: 6px;
  padding: 1.5rem 1.5rem 0.75rem;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.5),
    0 4px 20px rgba(120,105,85,0.1);
}

.bookcase-shelf {
  margin-bottom: 2.25rem;
}

.bookcase-shelf:last-child {
  margin-bottom: 0;
}



.bookend {
  width: 8px;
  height: 75px;
  align-self: flex-end;
  background: linear-gradient(135deg, #d4c8a8, #bfb08e);
  border-radius: 2px;
  box-shadow:
    1px 0 2px rgba(120,105,85,0.2),
    inset -1px 0 2px rgba(0,0,0,0.04),
    inset 1px 1px 0 rgba(255,255,255,0.25);
  flex-shrink: 0;
}

.book-spine {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  width: 44px;
  height: 170px;
  background: var(--spine-color, hsl(0, 50%, 45%));
  border-radius: 3px 3px 0 0;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
  flex-shrink: 0;
  filter: drop-shadow(1px 2px 3px rgba(120,105,85,0.25));
  transform: rotate(var(--spine-tilt, 0deg));
}

.book-spine::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    rgba(255,255,255,0.08) 0%,
    rgba(255,255,255,0.02) 15%,
    transparent 30%,
    transparent 65%,
    rgba(0,0,0,0.06) 85%,
    rgba(0,0,0,0.1) 100%
  );
  border-radius: 3px 3px 0 0;
  pointer-events: none;
}

.book-spine:hover {
  transform: translateY(-5px) rotate(var(--spine-tilt, 0deg));
  filter: drop-shadow(2px 8px 12px rgba(120,105,85,0.3));
}

.spine-title {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  color: rgba(255,255,255,0.92);
  font-size: 0.68rem;
  font-weight: 500;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  padding: 0.5rem 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-height: 155px;
  letter-spacing: 0.5px;
}

.spine-tooltip {
  position: absolute;
  bottom: 105%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  width: 180px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 10;
  pointer-events: none;
}

.book-spine:hover .spine-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.spine-tooltip-cover {
  width: 100%;
  aspect-ratio: 2/3;
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.5rem;
  background: var(--bg-alt);
}

.spine-tooltip-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.spine-tooltip-fallback {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 500;
  text-align: center;
  padding: 0.5rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.spine-tooltip-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
}

.spine-tooltip-info strong {
  font-size: 0.82rem;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}