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

html,
body {
  background-color: var(--color-bg-primary);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255, 140, 66, 0.2) 1px, transparent 0),
    linear-gradient(rgba(255, 140, 66, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 140, 66, 0.05) 1px, transparent 1px);
  background-size:
    var(--background-grid-size) var(--background-grid-size),
    var(--background-grid-size) var(--background-grid-size),
    var(--background-grid-size) var(--background-grid-size);
  color: var(--color-text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", sans-serif;
  line-height: 1.6;
  overflow-y: scroll;
  scrollbar-gutter: stable;
}

body {
  overflow: hidden;
}

/* Always-visible scrollbar with transparent interior and border */
::-webkit-scrollbar {
  width: 12px;
  background: transparent;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: transparent;
  border: 2px solid rgba(255, 140, 66, 0.4);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  border-color: rgba(255, 171, 112, 0.4);
}

/* For Firefox */
html {
  scrollbar-width: auto;
  scrollbar-color: rgba(255, 140, 66, 0.4) transparent;
}

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

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--page-pad-y) var(--page-pad-x);
}

header.site-header {
  text-align: center;
  margin-bottom: 3rem;
  padding-bottom: 0;
  border-bottom: none;
}

.post-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.site-title {
  color: var(--color-primary);
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  text-shadow: 0 0 20px var(--color-primary-glow);
}

.site-title a {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

.site-title a:hover {
  color: var(--color-primary-hover);
  text-decoration: none;
}

.site-header-post {
  margin-bottom: 1.25rem;
}

.site-tagline {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin: 0;
}

.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-shadow: none;
}

.posts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.post-item {
  padding: var(--list-pad);
  position: relative;
  cursor: pointer;
}

.post-item-link {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
}
.post-item-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: 6px;
}

.post-item:hover {
  border-color: var(--color-primary);
}

.post-item-pinned {
  cursor: default;
}

.post-item-pinned:hover {
  border-color: var(--color-border);
}

.post-item-pinned > * {
  pointer-events: auto;
}

.post-item h2 {
  cursor: pointer;
}

.post-item > *:not(.post-item-link):not(.pinned-content) {
  position: relative;
  z-index: 2;
  pointer-events: none;
}

.youtube-embed,
.soundcloud-embed,
.post-video {
  pointer-events: auto;
  position: relative;
  z-index: 3;
}

.youtube-embed iframe,
.soundcloud-embed iframe {
  pointer-events: auto;
}

.post-media {
  margin: 0 0 10px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.post-media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.post-media-video {
  position: relative;
  aspect-ratio: 16 / 9;
}

.post-media-soundcloud iframe {
  display: block;
  width: 100%;
  height: 320px;
  border: 0;
}

.post-media-play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

.post-media-play::before {
  content: "";
  width: 54px;
  height: 54px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.post-media-play::after {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 16px solid rgba(255, 255, 255, 0.9);
  margin-left: 4px;
}

.post-video {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: #000;
  margin: 0 0 10px;
}

.post-item h2 {
  color: var(--color-primary);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.post-item .excerpt {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Keep layout stable when content includes very long unbroken strings. */
.post-item h2,
.post-item .excerpt,
.post-content,
.pinned-content {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.post-item-pinned .pinned-content :first-child {
  margin-top: 0;
}

.pinned-content {
  overflow: visible;
}

/* List spacing + themed bullet/number markers */
.post-content ul,
.post-content ol,
.pinned-content ul,
.pinned-content ol {
  padding-left: 2.25rem;
  margin: 0.75rem 0;
}

.post-content li,
.pinned-content li {
  margin: 0.25rem 0;
}

.post-content li::marker,
.pinned-content li::marker {
  color: var(--color-primary);
}

/* Style details/summary toggles (used in pinned + posts) */
.post-content details,
.pinned-content details {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-primary);
  margin-top: 1rem;
}

.post-content summary,
.pinned-content summary {
  cursor: pointer;
  user-select: none;
  color: var(--color-text-primary);
  font-weight: 600;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
}

.post-content summary:hover,
.pinned-content summary:hover {
  background: var(--color-bg-secondary);
}

.post-content details[open] > summary,
.pinned-content details[open] > summary {
  margin-bottom: 0.5rem;
}

.post-content summary:focus-visible,
.pinned-content summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.post-content details > :not(summary),
.pinned-content details > :not(summary) {
  margin: 0.5rem 0.75rem 0.75rem;
}

.post-content details.phase-details > summary {
  display: block;
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  position: relative;
}

.post-content details.phase-details > summary::-webkit-details-marker {
  display: none;
}

.post-content details.phase-details > summary::after {
  content: "▸";
  position: absolute;
  top: 0.8rem;
  right: 1rem;
  font-size: 1.15rem;
  line-height: 1;
  color: var(--color-primary);
  transition: transform 0.15s ease;
}

.post-content details.phase-details[open] > summary::after {
  transform: rotate(90deg);
}

.post-content details.phase-details > summary .phase-summary-title {
  display: block;
  font-size: 1.05rem;
  color: var(--color-primary);
}

.post-content details.phase-details > summary .phase-summary-hint {
  margin: 0.75rem 0 0;
  padding-left: 1.1em;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.5;
  text-indent: -1.1em;
}

.post-content details.phase-details > summary .phase-summary-hint::before {
  content: "• ";
}

.post-content details.phase-details:not([open]) .phase-summary-hint-open {
  display: none;
}

.post-content details.phase-details[open] .phase-summary-hint-closed {
  display: none;
}

.post-content details.phase-details > summary .phase-summary-chain {
  margin: 0.5rem 0 0;
  line-height: 1.6;
}

.post-content details.phase-details > summary a.post-image-link {
  display: block;
  width: 100%;
  max-width: 760px;
  margin: 0.75rem 0 0;
  cursor: zoom-in;
  pointer-events: auto;
}

.post-content details.phase-details > summary a.post-image-link img.diagram {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.post-content {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--card-pad);
  line-height: 1.7;
  min-height: 50vh;
  position: relative;
  overflow: visible;
}

.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9rem;
}
.back-link:hover {
  text-decoration: underline;
  color: var(--color-primary-hover);
}

.github-edit-button {
  display: inline;
  text-decoration: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  opacity: 0.05;
}

.github-edit-button:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
  opacity: 1;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  color: var(--color-primary);
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.post-page-title {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.post-content h1:first-child,
.post-content h2:first-child,
.post-content h3:first-child {
  margin-top: 0;
}

.post-content a.post-image-link,
.pinned-content a.post-image-link {
  display: inline-block;
  max-width: 100%;
  cursor: zoom-in;
  line-height: 0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-primary);
}

.post-content a.post-image-link:hover,
.pinned-content a.post-image-link:hover,
.post-media a.post-image-link:hover,
.post-content a.post-image-link:focus-visible,
.pinned-content a.post-image-link:focus-visible,
.post-media a.post-image-link:focus-visible {
  border-color: var(--color-primary);
}

.post-content a.post-image-link:has(img.diagram),
.pinned-content a.post-image-link:has(img.diagram) {
  display: block;
  margin: 1.25rem 0;
}

.post-media a.post-image-link {
  display: block;
  width: 100%;
  cursor: zoom-in;
}

.post-content img,
.pinned-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 1rem 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.post-content a.post-image-link img,
.pinned-content a.post-image-link img,
.post-media a.post-image-link img {
  margin: 0;
  vertical-align: top;
}

.post-content img.diagram {
  display: block;
  margin: 1.25rem 0;
  border: 1px solid var(--color-border);
  background: var(--color-bg-primary);
  box-shadow: none;
}

.post-content a.post-image-link img.diagram,
.post-content a.post-image-link img.pipeline-step-icon,
.post-content a.post-image-link img.phase1-step-icon {
  margin: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.post-content a.post-image-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.post-content ol.pipeline-steps,
.post-content ol.phase1-steps {
  list-style: none;
  padding-left: 0;
  margin: 1.25rem 0;
  counter-reset: pipeline-step;
}

.post-content li.pipeline-step,
.post-content li.phase1-step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin: 1rem 0;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-primary);
  counter-increment: pipeline-step;
}

.post-content ol.pipeline-steps[data-phase="I"] > li.pipeline-step::before,
.post-content ol.pipeline-steps[data-phase="I"] > li.phase1-step::before,
.post-content ol.phase1-steps > li.pipeline-step::before,
.post-content ol.phase1-steps > li.phase1-step::before {
  content: "I." counter(pipeline-step);
}

.post-content ol.pipeline-steps[data-phase="II"] > li.pipeline-step::before,
.post-content ol.pipeline-steps[data-phase="II"] > li.phase1-step::before {
  content: "II." counter(pipeline-step);
}

.post-content ol.pipeline-steps[data-phase="III"] > li.pipeline-step::before,
.post-content ol.pipeline-steps[data-phase="III"] > li.phase1-step::before {
  content: "III." counter(pipeline-step);
}

.post-content li.pipeline-step::before,
.post-content li.phase1-step::before {
  flex-shrink: 0;
  min-width: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.6;
}

.post-content img.pipeline-step-icon,
.post-content img.phase1-step-icon {
  flex-shrink: 0;
  width: 88px;
  height: auto;
  max-height: 108px;
  margin: 0;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  box-shadow: none;
  background: var(--color-bg-secondary);
}

.post-content .pipeline-step-body,
.post-content .phase1-step-body {
  flex: 1;
  min-width: 0;
  line-height: 1.6;
}

.post-content .pipeline-step-body img.diagram,
.post-content .pipeline-step-body a.post-image-link:has(img.diagram) {
  margin: 1rem 0 0;
}

.post-content pre {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem;
  overflow: auto;
  margin: 1rem 0;
}

.post-content pre.code-block,
.pinned-content pre.code-block {
  position: relative;
  padding-top: 2.75rem;
}

.code-block-toolbar {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: inline-flex;
  gap: 0.45rem;
  z-index: 2;
}

.code-block-btn {
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text-muted);
  border-radius: 4px;
  font-size: 0.75rem;
  line-height: 1;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
}

.code-block-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.code-block-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.post-content code {
  background: var(--color-bg-code);
  color: var(--color-text-code);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: "Courier New", monospace;
  font-size: 0.95em;
}
.post-content pre code {
  background: none;
  padding: 0;
}

.post-content .katex,
.pinned-content .katex {
  color: var(--color-text-primary);
  font-size: 1.05em;
}

.post-content .katex-display,
.pinned-content .katex-display {
  margin: 1.25rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.25rem 0;
}

.post-content .table-scroll,
.pinned-content .table-scroll {
  overflow-x: auto;
  margin: 1rem 0;
}

.post-content table,
.pinned-content table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 1rem 0;
  overflow-wrap: break-word;
  word-break: normal;
}

.post-content .table-scroll table,
.pinned-content .table-scroll table {
  margin: 0;
}

.post-content th,
.post-content td,
.pinned-content th,
.pinned-content td {
  border: 1px solid var(--color-border);
  padding: 0.45rem 0.6rem;
  vertical-align: top;
  text-align: left;
}

.post-content th,
.pinned-content th {
  background: var(--color-bg-secondary);
  white-space: nowrap;
}

.post-content hr {
  border: none;
  height: 1px;
  margin: 1.5rem 0;
  background: rgba(255, 140, 66, 0.8);
  opacity: 0.8;
}

.pinned-content hr {
  border: none;
  height: 1px;
  margin: 1.5rem 0;
  background: rgba(255, 140, 66, 0.8);
  opacity: 0.8;
}

.youtube-embed {
  position: relative;
  width: 100%;
  max-width: 560px;
  margin: 1rem auto;
  aspect-ratio: 16 / 9;
}

.youtube-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 6px;
}

.soundcloud-embed {
  width: 100%;
  margin: 1rem 0;
  overflow: hidden;
  border-radius: 6px;
  line-height: 0;
}

.soundcloud-embed iframe {
  display: block;
  width: 100%;
  height: 400px;
  border: 0;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
  color: var(--color-text-muted);
}

.pagination-pages {
  display: inline-flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.pagination-pages a,
.pagination-pages strong[aria-current="page"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 6px;
  line-height: 1;
}

.pagination a {
  color: var(--color-text-primary);
  text-decoration: none;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  border: 1px solid transparent;
}

.pagination a:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

.pagination strong[aria-current="page"] {
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.pagination .disabled {
  opacity: 0.45;
  cursor: not-allowed;
  padding: 0.25rem 0.5rem;
}

.new-post-section {
  display: flex;
}

.new-post-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  opacity: 0.05;
}

.new-post-button:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 140, 66, 0.18);
  text-decoration: none;
  opacity: 1;
}

.new-post-button:active {
  transform: translateY(0);
}

.bottom-bar {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  text-align: left;
  opacity: 0.5;
}

.about-tip {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 10000;
  width: min(272px, calc(100vw - 16px));
  max-width: calc(100vw - 16px);
  margin: 0;
  box-sizing: border-box;
  pointer-events: auto;
  background: var(--color-bg-secondary, #161b22);
  border: 1px solid #30363d;
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  color: #c9d1d9;
  font-weight: 400;
  font-style: normal;
  letter-spacing: normal;
  line-height: 1.35;
  text-align: left;
  text-decoration: none;
  text-transform: none;
  white-space: normal;
  overflow-wrap: break-word;
  word-break: normal;
}

a.tip-open > .about-tip,
a > .about-tip.is-open,
.about-tip-trigger.tip-open > .about-tip,
.about-tip-trigger > .about-tip.is-open,
.about-tip.is-open {
  display: block !important;
  color: #c9d1d9;
  text-decoration: none;
  pointer-events: auto;
}

.about-tip-art {
  display: block;
  width: 100%;
  aspect-ratio: 460 / 215;
  background: #0d1117 center / cover no-repeat;
}

.about-tip-body {
  display: block;
  padding: 8px 10px 10px;
}

a.about-tip-title {
  display: inline;
  font-size: 0.95em;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  text-decoration: none;
}

a.about-tip-title:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.about-tip-date {
  display: inline;
  margin: 0 0 0 6px;
  font-size: 0.75em;
  font-weight: 400;
  color: #6e7681;
}

.about-tip-desc {
  display: block;
  margin-top: 6px;
  font-size: 0.8em;
  color: #8b949e;
}

.about-tip-note {
  display: block;
  margin-top: 8px;
  font-size: 0.75em;
  font-style: italic;
  color: #8b949e;
}

.about-tip-said {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  margin: 0 0 6px;
  font-style: normal;
  font-weight: 600;
  color: #6e7681;
}

.about-tip-said::after {
  content: "";
  flex: 1 1 auto;
  border-bottom: 1px solid #30363d;
  margin-bottom: 0.2em;
}

.game-cell.tip-open,
.about-studio a.tip-open,
.about-tip-trigger.tip-open,
.about-tip-trigger:hover {
  z-index: 80;
}

@media (hover: none), (pointer: coarse) {
  a:not(.tip-open):hover > .about-tip,
  .about-tip-trigger:not(.tip-open):hover > .about-tip {
    display: none !important;
  }
}

@media (max-width: 720px) {
  :root {
    --page-pad-x: 0px;
    --page-pad-y: 0.6rem;
    --card-pad: 0.75rem;
    --list-pad: 0.75rem;
  }

  header.site-header {
    margin-bottom: 1.15rem;
  }

  .site-header-post {
    margin-bottom: 0.65rem;
  }

  .site-title {
    font-size: 1.85rem;
    margin-bottom: 0.3rem;
  }

  .site-tagline {
    font-size: 0.95rem;
  }

  .posts {
    gap: 0.65rem;
  }

  .post-topbar {
    margin-bottom: 0.55rem;
    gap: 0.5rem;
  }

  .back-link {
    margin-bottom: 0.75rem;
  }

  .card {
    border-radius: 0;
  }

  .post-item-link {
    border-radius: 0;
  }

  .pagination {
    gap: 0.5rem;
    margin: 1rem 0;
  }

  .bottom-bar {
    margin-top: 1.25rem;
    padding-top: 0.75rem;
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
}