/* ===== Post Detail Page ===== */
.post-container {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  padding: 100px 24px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.post-article {
  width: 100%;
  max-width: 780px;
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 40px;
  transition: color 0.3s ease;
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

.post-back:hover {
  color: var(--accent-cyan);
}

.post-back svg {
  width: 16px;
  height: 16px;
}

.post-header {
  margin-bottom: 48px;
}

.post-category {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 20px;
  background: var(--accent-cyan-bg);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan-border);
}

.post-title {
  font-family: "Google Sans", sans-serif;
  display: block;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 20px;
  padding-bottom: 0.08em;
  background: linear-gradient(135deg, #fff 50%, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.post-meta svg {
  width: 14px;
  height: 14px;
  margin-right: 6px;
  vertical-align: -2px;
}


/* ===== Post Content (Notion Blocks) ===== */
.post-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-primary);
  user-select: text;
  -webkit-user-select: text;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: "Google Sans", sans-serif;
  color: var(--text-primary);
  margin-top: 48px;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.post-content h2 {
  font-size: 2rem;
}

.post-content h3 {
  font-size: 1.5rem;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--glass-border);
}

.post-content h4 {
  font-size: 1.2rem;
}

.post-content p {
  margin-bottom: 24px;
}

.post-content a {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-cyan-border);
  transition: border-color 0.3s ease;
}

.post-content a:hover {
  border-color: var(--accent-cyan);
}

.post-content ul,
.post-content ol {
  margin-bottom: 24px;
  padding-left: 28px;
}

.post-content li {
  margin-bottom: 8px;
}

.post-content blockquote {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 3px solid var(--accent-cyan);
  background: var(--glass-bg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-primary);
}

.post-content pre {
  margin: 28px 0;
  padding: 24px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--glass-border);
  overflow-x: auto;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.post-content code {
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--accent-cyan-bg);
  color: var(--accent-cyan);
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.88em;
}

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

.post-content img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 28px 0;
  border: 1px solid var(--glass-border);
}

.post-content hr {
  border: none;
  height: 1px;
  background: var(--glass-border);
  margin: 48px 0;
}


/* ===== Loading Skeleton ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--glass-bg) 25%,
    var(--glass-bg-hover) 50%,
    var(--glass-bg) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}



/* ===== Floating Bookmark Button ===== */
.fab-bookmark {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0;
  width: 48px;
  height: 48px;
  border-radius: 100px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: var(--text-secondary);
  cursor: pointer;
  overflow: hidden;
  padding: 0 14px;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all 0.4s var(--transition-smooth);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  animation: fabSlideIn 0.5s var(--transition-smooth) 0.8s both;
}

@keyframes fabSlideIn {
  from { opacity: 0; transform: translateY(20px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.fab-bookmark:hover {
  width: 108px;
  gap: 6px;
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

.fab-bookmark-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: all 0.3s var(--transition-smooth);
}

.fab-bookmark-label {
  white-space: nowrap;
  opacity: 0;
  width: 0;
  overflow: hidden;
  transition: all 0.4s var(--transition-smooth);
}

.fab-bookmark:hover .fab-bookmark-label {
  opacity: 1;
  width: auto;
}

/* Bookmarked state */
.fab-bookmark.bookmarked {
  border-color: var(--accent-bookmark-border);
  background: var(--accent-bookmark-bg);
  color: var(--accent-bookmark);
}

.fab-bookmark.bookmarked .fab-bookmark-icon {
  fill: var(--accent-bookmark);
  stroke: var(--accent-bookmark);
}

.fab-bookmark.bookmarked:hover {
  border-color: var(--accent-bookmark-border-strong);
  background: var(--accent-bookmark-bg-strong);
  box-shadow: 0 8px 32px var(--accent-bookmark-glow);
}

/* Bounce animation on toggle */
@keyframes fabBounce {
  0% { transform: scale(1); }
  30% { transform: scale(1.25); }
  50% { transform: scale(0.9); }
  70% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.fab-bookmark.bounce .fab-bookmark-icon {
  animation: fabBounce 0.5s var(--transition-smooth);
}


.post-callout {
  display: flex;
  gap: 14px;
  margin: 28px 0;
  padding: 18px 20px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
}

.post-callout-icon {
  flex: 0 0 auto;
  font-size: 1.25rem;
  line-height: 1.4;
}

.post-callout-body {
  min-width: 0;
}

.post-callout-body > :last-child {
  margin-bottom: 0;
}

.post-toggle {
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
}

.post-toggle > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
}

.post-toggle > summary::-webkit-details-marker {
  color: var(--accent-cyan);
}

.post-toggle[open] > summary {
  margin-bottom: 14px;
}

.post-todo {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 18px 0;
}

.post-todo-box {
  display: inline-flex;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid var(--accent-cyan-border-strong);
  color: var(--accent-cyan);
  background: var(--accent-cyan-bg-subtle);
  font-size: 0.85rem;
  line-height: 1;
}

.post-todo-content {
  min-width: 0;
}

.post-todo-text {
  margin-bottom: 0;
}

.post-todo-content > :last-child {
  margin-bottom: 0;
}

.post-todo.checked .post-todo-content {
  color: var(--text-secondary);
}

.post-todo.checked .post-todo-text {
  text-decoration: line-through;
}

.post-figure,
.post-embed,
.post-resource,
.post-bookmark,
.post-child-page,
.post-table-of-contents,
.post-unsupported,
.post-equation,
.post-table-wrapper {
  margin: 28px 0;
}

.post-figure-image,
.post-resource,
.post-bookmark,
.post-child-page,
.post-table-of-contents,
.post-unsupported,
.post-equation {
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.03);
}

.post-figure {
  display: grid;
  gap: 12px;
}

.post-embed {
  display: grid;
  gap: 12px;
}

.post-embed-meta {
  display: grid;
  gap: 10px;
}

.post-figure-media {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius-sm) - 6px);
}

.post-block-label,
.post-unsupported-title {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.post-resource-link,
.post-unsupported-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-cyan);
  text-decoration: none;
  word-break: break-word;
}

.post-bookmark-link {
  display: grid;
  gap: 6px;
  color: inherit;
  text-decoration: none;
}

.post-bookmark-title {
  color: var(--accent-cyan);
  font-weight: 600;
}

.post-resource-link-disabled {
  color: var(--text-secondary);
}

.post-figure-caption,
.post-resource-caption,
.post-bookmark-url,
.post-unsupported-detail {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
  word-break: break-word;
}

.post-resource-body,
.post-bookmark,
.post-resource,
.post-child-page,
.post-table-of-contents {
  display: grid;
  gap: 10px;
}

.post-embed-shell {
  position: relative;
  overflow: hidden;
  border-radius: calc(var(--radius-sm) - 6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 16, 33, 0.72);
  aspect-ratio: 16 / 9;
  min-height: 260px;
}

.post-embed-frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: rgba(7, 16, 33, 0.72);
}

.post-unsupported {
  display: grid;
  gap: 10px;
}

.post-child-page-title {
  margin: 0;
  font-weight: 600;
  color: var(--text-primary);
}

.post-equation {
  display: grid;
  gap: 12px;
}

.post-equation-expression {
  overflow-x: auto;
}

.post-equation-expression code {
  display: inline-block;
  padding: 0;
  background: none;
  color: var(--text-primary);
  font-size: 0.96rem;
}

.post-table-of-contents-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

.post-table-of-contents-item.level-2 {
  margin-left: 12px;
}

.post-table-of-contents-item.level-3 {
  margin-left: 24px;
}

.post-table-of-contents a {
  color: var(--accent-cyan);
  text-decoration: none;
}

.post-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
}

.post-table-wrapper:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 4px;
}

.post-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
}

.post-table th,
.post-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--glass-border);
  text-align: left;
  vertical-align: top;
}

.post-table th {
  font-weight: 600;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.post-table tbody tr:last-child th,
.post-table tbody tr:last-child td {
  border-bottom: none;
}

@media (max-width: 768px) {
  .post-article {
    max-width: 100%;
  }

  .post-back {
    margin-bottom: 28px;
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.04);
  }

  .post-header {
    margin-bottom: 34px;
  }

  .post-title {
    font-size: clamp(2rem, 9.5vw, 2.8rem);
    line-height: 1.15;
  }

  .post-meta {
    flex-wrap: wrap;
    gap: 10px 16px;
    font-size: 0.82rem;
  }

  .post-content {
    font-size: 1rem;
    line-height: 1.78;
  }

  .post-content h2,
  .post-content h3,
  .post-content h4 {
    margin-top: 36px;
    margin-bottom: 16px;
  }

  .post-content h2 {
    font-size: 1.7rem;
  }

  .post-content h3 {
    font-size: 1.35rem;
  }

  .post-content h4 {
    font-size: 1.1rem;
  }

  .post-content p,
  .post-content ul,
  .post-content ol,
  .post-content blockquote,
  .post-content pre,
  .post-content img {
    margin-bottom: 22px;
  }

  .post-content ul,
  .post-content ol {
    padding-left: 24px;
  }

  .post-content blockquote {
    padding: 18px 18px 18px 20px;
  }

  .post-content pre {
    padding: 18px;
    border-radius: 18px;
    font-size: 0.82rem;
  }

  .fab-bookmark {
    bottom: calc(18px + env(safe-area-inset-bottom));
    right: 18px;
    width: 48px;
    height: 48px;
    padding: 0 14px;
    border-radius: 18px;
  }

  .fab-bookmark:hover {
    width: 48px;
    gap: 0;
    transform: none;
  }

  .fab-bookmark-label {
    display: none;
  }

}

@media (max-width: 540px) {
  .post-title {
    font-size: clamp(1.85rem, 10vw, 2.3rem);
    line-height: 1.14;
  }

  .post-content pre {
    margin-left: -2px;
    margin-right: -2px;
    padding: 16px;
  }

  .fab-bookmark {
    bottom: calc(16px + env(safe-area-inset-bottom));
    right: 16px;
  }
}