/* https://www.nordtheme.com/ */
:root {
  /* Polar Night */
  --nord0: #2E3440;
  --nord1: #3B4252;
  --nord2: #434C5E;
  --nord3: #4C566A;
  /* Snow Storm */
  --nord4: #D8DEE9;
  --nord5: #E5E9F0;
  --nord6: #ECEFF4;
  /* Frost */
  --nord7: #8FBCBB;
  --nord8: #88C0D0;
  --nord9: #81A1C1;
  --nord10: #5E81AC;
  /* Aurora */
  --nord11: #BF616A;
  --nord12: #D08770;
  --nord13: #EBCB8B;
  --nord14: #A3BE8C;
  --nord15: #B48EAD;

  --paper: var(--nord0);
  --ink: var(--nord6);
  --ink-soft: var(--nord4);
  --ink-faint: var(--nord3);
  --line: var(--nord2);
  --accent: var(--nord8);
  --accent-soft: var(--nord1);
  --code-bg: var(--nord1);

  --font-display: Iowan Old Style, Palatino Linotype, Georgia, "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--nord6);
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
a:hover {
  border-bottom-color: currentColor;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 2.25rem 0 1.25rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2rem;
}

header h1 {
  font-size: 1.35rem;
  margin: 0;
  letter-spacing: -0.01em;
  color: var(--nord6);
}
header a { border-bottom: none; }
header a:hover { border-bottom: none; opacity: 0.8; }

header nav ul {
  list-style: none;
  display: flex;
  gap: 1.25rem;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
header nav a {
  color: var(--ink-soft);
  border-bottom: none;
}
header nav a:hover {
  color: var(--accent);
}

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

.post-list li {
  display: block;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}
.post-list li:first-child {
  padding-top: 0;
}

.post-list-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
}
.post-list-header time {
  order: -1;
  flex: 0 0 6.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  white-space: nowrap;
}
.post-list-header a {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--ink);
  border-bottom: none;
}
.post-list-header a:hover {
  color: var(--accent);
}

.post-list-description {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

@media (max-width: 480px) {
  .post-list-header {
    flex-direction: column;
    gap: 0.15rem;
  }
  .post-list-header time {
    flex-basis: auto;
  }
}

article h1 {
  font-size: 2rem;
  margin-bottom: 0.4rem;
}
article > time {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1.75rem;
}
article img {
  margin: 1.5rem 0;
}
article p {
  margin: 1.1rem 0;
}

.license {
  margin-top: 0.5rem;
  font-size: 0.75rem;
}
.license a {
  color: var(--ink-faint);
}
.license a:hover {
  color: var(--accent);
}

.comments {
  margin-top: 3.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}

.comments-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.comments-header h2 {
  font-size: 1.15rem;
  margin: 0;
}

.comments-title-toggle {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
  border-radius: 4px;
  transition: color 0.15s ease;
}
.comments-title-toggle:hover h2 {
  color: var(--accent);
}
.comments-title-toggle::before {
  content: "//";
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.9rem;
}
.comments-title-toggle::after {
  font-size: 0.65rem;
  color: var(--ink-faint);
  transition: transform 0.15s ease;
}
.comments-title-toggle:hover::after {
  color: var(--accent);
}

#comments-master-toggle:checked ~ .comments-body {
  display: none;
}
#comments-master-toggle:checked ~ .comments-header .comments-title-toggle::after {
  transform: rotate(-90deg);
}

.toggle-checkbox {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.comment-form-button {
  cursor: pointer;
  background: var(--accent);
  color: var(--nord0);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  user-select: none;
  white-space: nowrap;
  transition: background 0.15s ease;
}
.comment-form-button:hover {
  background: var(--nord7);
}
.toggle-checkbox:checked ~ .comments-header .comment-form-button {
  background: var(--nord2);
  color: var(--ink);
}
.toggle-checkbox:focus-visible ~ .comments-header .comment-form-button {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.comment-form-panel {
  display: none;
  margin-top: 1.25rem;
}
.toggle-checkbox:checked ~ .comment-form-panel {
  display: block;
}

@media (max-width: 480px) {
  .comments-header {
    flex-wrap: wrap;
  }
}

.comments-toggle {
  margin-top: 0.5rem;
}

.comments-toggle summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  padding: 0.65rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  user-select: none;
}
.comments-toggle summary::-webkit-details-marker {
  display: none;
}
.comments-toggle summary::marker {
  display: none;
  content: "";
}
.comments-toggle summary::before {
  display: inline-block;
  transition: transform 0.15s ease;
  font-size: 0.7rem;
}
.comments-toggle[open] summary::before {
  transform: rotate(90deg);
}
.comments-toggle summary:hover {
  color: var(--nord7);
}

.comments-list-body {
  margin-top: 1.5rem;
}

.comment {
  display: flex;
  gap: 0.85rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}
.comments-list-body .comment:first-child {
  padding-top: 0;
}
.comments-list-body .comment:last-child {
  border-bottom: none;
}

.comment-avatar {
  flex: 0 0 2.1rem;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  flex-shrink: 0;
}

.comment-body { flex: 1; min-width: 0; }

.comment-meta {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}
.comment-meta strong {
  font-family: var(--font-display);
  font-size: 0.98rem;
  color: var(--ink);
}
.comment-meta time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
}
.comment-body p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.93rem;
  line-height: 1.6;
}

.reply-button {
  display: inline-block;
  cursor: pointer;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  user-select: none;
}
.reply-button:hover {
  color: var(--nord7);
}

.reply-form-panel {
  display: none;
  margin-top: 0.75rem;
}

.toggle-checkbox:checked + .reply-button + .reply-form-panel {
  display: block;
}

.comment-form-reply {
  padding: 1rem;
}
.comment-form-reply textarea {
  min-height: 70px;
}

.comment-replies {
  margin-top: 1rem;
  padding-left: 1.25rem;
  border-left: 2px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.comment-reply {
  padding: 0;
  border-bottom: none;
}
.comment-reply .comment-avatar {
  width: 1.7rem;
  height: 1.7rem;
  font-size: 0.72rem;
}

.replies-toggle {
  margin-top: 0.75rem;
}
.replies-toggle summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  user-select: none;
}
.replies-toggle summary::-webkit-details-marker {
  display: none;
}
.replies-toggle summary::marker {
  display: none;
  content: "";
}
.replies-toggle summary::before {
  display: inline-block;
  transition: transform 0.15s ease;
  font-size: 0.65rem;
}
.replies-toggle[open] > summary::before {
  transform: rotate(90deg);
}
.replies-toggle summary:hover {
  color: var(--nord7);
}

.comments-empty {
  color: var(--ink-faint);
  font-size: 0.88rem;
  font-family: var(--font-mono);
  margin-top: 1.25rem;
}

.comment-form {
  margin-top: 0.25rem;
  padding: 1.5rem;
  background: var(--nord1);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  width: 100%;
}

.comment-form label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.comment-form input[type="text"],
.comment-form textarea {
  width: 100%;
  background: var(--nord0);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 0.6rem 0.75rem;
  border-radius: 5px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.comment-form input[type="text"]::placeholder,
.comment-form textarea::placeholder {
  color: var(--ink-faint);
}
.comment-form input[type="text"]:focus,
.comment-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(136, 192, 208, 0.15);
}

.comment-form textarea {
  resize: vertical;
  min-height: 110px;
}

.comment-form button {
  align-self: flex-start;
  background: var(--accent);
  color: var(--nord0);
  border: none;
  padding: 0.6rem 1.4rem;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.15s ease;
}
.comment-form button:hover {
  background: var(--nord7);
}
.comment-form button:active {
  background: var(--nord9);
}

.hp-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
}

@media (max-width: 480px) {
  .comment {
    gap: 0.65rem;
  }
  .comment-form {
    padding: 1.1rem;
  }
  .comments-header {
    align-items: center;
  }
}
.error-page {
  text-align: center;
  padding: 4rem 0;
}
.error-code {
  font-family: var(--font-mono);
  font-size: 3rem;
  color: var(--accent);
  margin: 0;
  line-height: 1;
}
.error-page h1 {
  margin: 0.5rem 0 1rem;
}
.error-page p {
  color: var(--ink-soft);
}
.error-home-link {
  display: inline-block;
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.reading-time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
}

.toc {
  background: var(--nord1);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}
.toc-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}
.toc ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.toc ul ul {
  padding-left: 1rem;
  margin-top: 0.25rem;
}
.toc li {
  margin: 0.3rem 0;
}
.toc a {
  color: var(--ink-soft);
  border-bottom: none;
}
.toc a:hover {
  color: var(--accent);
}

.tags {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.tags a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--nord5);
  background: var(--nord2);
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  margin: 0 0.35rem 0.35rem 0;
  border-bottom: none;
}
.tags a:hover {
  background: var(--nord7);
}

.tag-list {
  list-style: none;
  padding: 0;
}
.tag-list li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.tag-list a { border-bottom: none; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  padding: 1rem;
  overflow-x: auto;
  border-radius: 4px;
  font-size: 0.85rem;
  color: var(--nord5);
}
code {
  font-family: var(--font-mono);
  background: var(--code-bg);
  color: var(--nord13);
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  font-size: 0.85em;
}
pre code {
  background: none;
  padding: 0;
  color: inherit;
}

blockquote {
  border-left: 2px solid var(--nord9);
  margin: 1.5rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  color: var(--ink-soft);
  font-style: italic;
}

.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.pagination a { color: var(--accent); }
.pagination-disabled { color: var(--ink-faint); }
.pagination-info { color: var(--ink-soft); }

.intro {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}
.intro p {
  margin: 0.5rem 0;
}

.more-link {
  margin-top: 1.5rem;
}
.more-link a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.post-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  border-bottom: none;
  max-width: 48%;
}
.post-nav-next {
  text-align: right;
  margin-left: auto;
}
.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.post-nav-title {
  font-family: var(--font-display);
  color: var(--ink);
}
.post-nav a:hover .post-nav-title {
  color: var(--accent);
}

@media (max-width: 480px) {
  .post-nav {
    flex-direction: column;
  }
  .post-nav a {
    max-width: 100%;
  }
  .post-nav-next {
    text-align: left;
    margin-left: 0;
  }
}

footer {
  margin: 3rem 0 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
  text-align: center;
}

@media (max-width: 600px) {
  body { padding: 0 1rem; }
  header { padding-top: 1.5rem; }
  article h1 { font-size: 1.6rem; }
}