:root {
  --color-bg: #E4EBF4;
  --color-bg-top: #EDF2F8;
  --color-bg-bottom: #DCE5F0;
  --color-panel: #F3F7FB;
  --color-panel-sunk: #D6E0EC;
  --color-border: #C3D0DF;
  --color-border-soft: color-mix(in srgb, var(--color-border) 58%, transparent);
  --color-accent: #FFC81C;
  --color-accent-light: color-mix(in srgb, var(--color-accent) 62%, var(--color-panel));
  --color-accent-dark: #D99E00;
  --color-accent-soft: color-mix(in srgb, var(--color-accent) 18%, transparent);
  --color-text: #10172B;
  --color-muted: #5B6780;
  --color-faint: color-mix(in srgb, var(--color-muted) 68%, var(--color-bg));
  --color-success: #1F9D5F;
  --color-warning: #D97C0B;
  --color-error: #D4374A;
  --color-window: #10172B;
  --color-window-top: color-mix(in srgb, var(--color-window) 88%, var(--color-muted));
  --color-window-text: #F3F7FB;
  --color-window-muted: color-mix(in srgb, var(--color-window-text) 58%, var(--color-window));
  --color-white: #FFFFFF;
  --color-overlay: color-mix(in srgb, var(--color-window) 68%, transparent);
  --color-shadow: color-mix(in srgb, var(--color-window) 12%, transparent);
  --color-shadow-strong: color-mix(in srgb, var(--color-window) 22%, transparent);
  --font-display: "Inter", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --radius-small: 8px;
  --radius-medium: 10px;
  --radius-pill: 999px;
  --blog-column: 56rem;
  --blog-gutter: clamp(1.5rem, 4vw, 2.25rem);
  --blog-wide: 72rem;
  --blog-shadow: 0 24px 60px var(--color-shadow);
  --blog-shadow-hover: 0 28px 64px var(--color-shadow-strong);
  --transition-fast: 160ms ease;
  --transition-normal: 220ms ease;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}

.blog-column,
.blog-index-wrap,
.reading-wrap,
.breadcrumb,
.article-footer-wrap {
  box-sizing: border-box;
  width: min(100%, calc(var(--blog-column) + (var(--blog-gutter) * 2)));
  max-width: calc(var(--blog-column) + (var(--blog-gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.blog-hero {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--color-border);
  background:
    linear-gradient(var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(180deg, var(--color-bg-top), var(--color-bg-bottom));
  background-size: 32px 32px, 32px 32px, auto;
  padding-block: clamp(4.5rem, 9vw, 7.5rem);
}

.blog-hero::after {
  position: absolute;
  right: max(var(--blog-gutter), calc((100vw - var(--blog-column)) / 2));
  bottom: 1.5rem;
  width: clamp(4rem, 10vw, 8rem);
  height: clamp(4rem, 10vw, 8rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  box-shadow:
    -16px -16px 0 var(--color-bg-bottom),
    -16px -16px 0 1px var(--color-border);
  content: "";
  opacity: 0.72;
  pointer-events: none;
}

.blog-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.25rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.blog-kicker .status-dot {
  flex: 0 0 auto;
}

.blog-hero h1 {
  max-width: 44rem;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  text-wrap: pretty;
}

.blog-hero h1 .no-break {
  background: linear-gradient(transparent 68%, var(--color-accent-soft) 68%);
}

.blog-hero p:last-child {
  max-width: 46rem;
  margin: 1.35rem 0 0;
  color: var(--color-muted);
  font-size: 1.05rem;
  line-height: 1.85;
}

.blog-index-section {
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

.blog-index-wrap {
  width: min(100%, calc(var(--blog-wide) + (var(--blog-gutter) * 2)));
  max-width: calc(var(--blog-wide) + (var(--blog-gutter) * 2));
}

.blog-list-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.75rem;
}

.blog-list-heading h2 {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.45rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-wrap: pretty;
}

.blog-list-heading > p {
  max-width: 24rem;
  margin: 0;
  color: var(--color-muted);
  line-height: 1.7;
}

.section-code {
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.tag-filter button {
  appearance: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-muted);
  cursor: pointer;
  font: 600 0.9rem/1 var(--font-body);
  padding: 0.72rem 1rem;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.tag-filter button:hover,
.tag-filter button:focus-visible {
  border-color: var(--color-text);
  color: var(--color-text);
}

.tag-filter button.is-active {
  border-color: var(--color-window);
  background: var(--color-window);
  color: var(--color-window-text);
}

.article-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.article-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 20rem;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-white);
  padding: clamp(1.4rem, 3vw, 2rem);
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-normal);
}

.article-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.article-card:hover {
  border-color: color-mix(in srgb, var(--color-text) 30%, var(--color-border));
  box-shadow: var(--blog-shadow);
  transform: translateY(-3px);
}

.article-card:hover::before {
  opacity: 1;
}

.article-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.article-tag {
  color: var(--color-text);
  font-weight: 700;
}

.meta-separator {
  color: var(--color-faint);
}

.article-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.3vw, 1.48rem);
  font-weight: 750;
  letter-spacing: -0.015em;
  line-height: 1.45;
  text-wrap: pretty;
}

.article-card > p {
  margin: 1rem 0 1.5rem;
  color: var(--color-muted);
  font-size: 0.98rem;
  line-height: 1.8;
}

.article-card-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--color-text);
  font-weight: 750;
  text-underline-offset: 0.25em;
}

.article-card-link:hover {
  text-decoration-color: var(--color-accent-dark);
}

.blog-empty {
  margin: 2rem 0 0;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-muted);
  padding: 2rem;
  text-align: center;
}

.breadcrumb {
  margin-top: clamp(1.25rem, 3vw, 2rem);
  padding-top: 0.25rem;
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  margin-left: 0.45rem;
  color: var(--color-faint);
  content: "/";
}

.breadcrumb a {
  color: var(--color-muted);
  text-underline-offset: 0.2em;
}

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

.article-hero {
  box-sizing: border-box;
  width: 100vw;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  margin-left: calc(50% - 50vw);
  border-block: 1px solid var(--color-border);
  background:
    linear-gradient(var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(135deg, var(--color-bg-top), var(--color-panel-sunk));
  background-size: 28px 28px, 28px 28px, auto;
  padding:
    clamp(2.75rem, 6vw, 5rem)
    max(var(--blog-gutter), calc((100vw - var(--blog-column)) / 2));
}

.article-hero > * {
  max-width: var(--blog-column);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 0.4rem;
  margin: 0 0 1.1rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
}

.article-meta > *:not(:last-child)::after {
  margin-left: 0.4rem;
  color: var(--color-faint);
  content: "·";
}

.article-hero h1 {
  max-width: var(--blog-column);
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
  text-wrap: pretty;
}

.article-hero-summary {
  max-width: 48rem;
  margin: 1.25rem 0 0;
  color: var(--color-muted);
  font-size: 1.05rem;
  line-height: 1.85;
}

.reading-wrap {
  width: min(100%, calc(var(--blog-column) + (var(--blog-gutter) * 2)));
  max-width: calc(var(--blog-column) + (var(--blog-gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.prose {
  counter-reset: article-section;
  padding-block: clamp(2.5rem, 5vw, 4rem);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.85;
}

.prose > :first-child {
  margin-top: 0;
}

.prose h2 {
  position: relative;
  margin: 3.25rem 0 1.15rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.4;
  text-wrap: pretty;
  counter-increment: article-section;
}

.prose h2::before {
  display: inline-block;
  min-width: 3.2rem;
  margin-right: 0.65rem;
  color: var(--color-accent-dark);
  content: "FIG " counter(article-section, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.04em;
  vertical-align: 0.18em;
}

.prose h3 {
  margin: 2.25rem 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2.3vw, 1.3rem);
  font-weight: 750;
  letter-spacing: -0.01em;
  line-height: 1.45;
  text-wrap: pretty;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose table,
.prose pre,
.prose .callout,
.prose .stat-grid,
.prose .check-list,
.prose .verdict {
  margin-block: 1.25rem;
}

.prose p {
  line-height: 1.85;
}

.prose ul,
.prose ol {
  padding-left: 1.4rem;
}

.prose li {
  margin-block: 0.45rem;
}

.prose a {
  color: var(--color-text);
  font-weight: 650;
  text-decoration-color: var(--color-accent-dark);
  text-decoration-thickness: 0.12em;
  text-underline-offset: 0.22em;
}

.prose strong {
  font-weight: 750;
}

.prose blockquote {
  border-left: 3px solid var(--color-accent);
  background: color-mix(in srgb, var(--color-panel) 78%, var(--color-accent-soft));
  color: var(--color-muted);
  padding: 1rem 1.25rem;
}

.prose table,
.data-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  font-size: 0.92rem;
}

.prose th,
.data-table th {
  background: var(--color-window);
  color: var(--color-window-text);
  font-weight: 700;
  padding: 0.85rem 1rem;
  text-align: left;
  white-space: nowrap;
}

.prose td,
.data-table td {
  border-top: 1px solid var(--color-border);
  padding: 0.85rem 1rem;
  vertical-align: top;
}

.prose tbody tr:nth-child(even),
.data-table tbody tr:nth-child(even) {
  background: var(--color-panel-sunk);
}

.prose tbody tr:hover,
.data-table tbody tr:hover {
  background: var(--color-accent-soft);
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.prose pre {
  position: relative;
  overflow-x: auto;
  border: 1px solid var(--color-window-top);
  border-radius: var(--radius-small);
  background: var(--color-window);
  color: var(--color-window-text);
  padding: 2.8rem 1.25rem 1.25rem;
  font: 0.86rem/1.75 var(--font-mono);
  tab-size: 2;
}

.prose pre::before {
  position: absolute;
  top: 1rem;
  left: 1.1rem;
  width: 0.68rem;
  height: 0.68rem;
  border-radius: var(--radius-pill);
  background: var(--color-error);
  box-shadow:
    1.05rem 0 0 var(--color-accent),
    2.1rem 0 0 var(--color-success);
  content: "";
}

.prose pre code {
  color: inherit;
  font-family: inherit;
}

.callout {
  position: relative;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent-dark);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  padding: 1.15rem 1.25rem 1.15rem 3.4rem;
}

.callout::before {
  position: absolute;
  top: 1.08rem;
  left: 1rem;
  display: grid;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-text);
  content: "i";
  font: 800 0.8rem/1 var(--font-mono);
}

.callout.warning,
.callout-warning {
  border-left-color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 9%, var(--color-panel));
}

.callout.warning::before,
.callout-warning::before {
  background: var(--color-warning);
  color: var(--color-white);
  content: "!";
}

.callout.success,
.callout-success {
  border-left-color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 9%, var(--color-panel));
}

.callout.success::before,
.callout-success::before {
  background: var(--color-success);
  color: var(--color-white);
  content: "✓";
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.8rem;
}

.stat-card {
  position: relative;
  overflow: hidden;
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  padding: 1.25rem;
}

.stat-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--color-accent);
  content: "";
}

.stat-card:nth-child(even) {
  background: var(--color-panel-sunk);
}

.stat-card:nth-child(even)::before {
  background: var(--color-text);
}

.stat-num {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  font-weight: 800;
  line-height: 1.2;
}

.stat-label {
  margin-top: 0.5rem;
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.check-list {
  display: grid;
  gap: 0.55rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  padding: 0.85rem 1rem;
}

.verdict {
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-small) var(--radius-small) 0;
  background: color-mix(in srgb, var(--color-accent) 13%, var(--color-panel));
  padding: 1.05rem 1.2rem;
}

.verdict strong:first-child {
  color: var(--color-text);
}

.promo-block {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  overflow: hidden;
  border: 1px solid var(--color-window-top);
  border-radius: var(--radius-medium);
  background:
    linear-gradient(135deg, var(--color-window), var(--color-window-top));
  box-shadow: var(--blog-shadow);
  color: var(--color-window-text);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.promo-block::after {
  position: absolute;
  right: 8%;
  bottom: -3rem;
  width: 9rem;
  height: 9rem;
  border: 1px solid var(--color-window-muted);
  border-radius: var(--radius-small);
  box-shadow:
    -1.25rem -1.25rem 0 color-mix(in srgb, var(--color-window-text) 4%, transparent),
    -1.25rem -1.25rem 0 1px var(--color-window-muted);
  content: "";
  opacity: 0.3;
  pointer-events: none;
}

.promo-block > * {
  position: relative;
  z-index: 1;
}

.promo-block h2 {
  margin: 0;
  color: var(--color-window-text);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.promo-block p {
  max-width: 36rem;
  margin: 0.7rem 0 0;
  color: var(--color-window-muted);
  line-height: 1.75;
}

.promo-block .signup-modal-actions {
  flex: 0 0 auto;
}

.promo-block .btn-primary {
  flex: 0 0 auto;
  border-color: var(--color-white);
  background: var(--color-white);
  color: var(--color-window);
}

.promo-block .btn-primary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-text);
}

#related-posts {
  padding-top: clamp(2rem, 4vw, 3rem);
}

#related-posts > h2 {
  margin: 0 0 1.15rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.related-card {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  padding: 1.15rem;
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-normal);
}

.related-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.related-card:hover {
  border-color: color-mix(in srgb, var(--color-text) 28%, var(--color-border));
  box-shadow: var(--blog-shadow);
  transform: translateY(-3px);
}

.related-card:hover::before {
  opacity: 1;
}

.related-meta {
  margin: 0 0 0.7rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.5;
}

.related-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: -0.01em;
  line-height: 1.5;
  text-wrap: pretty;
}

.related-card > p:not(.related-meta) {
  display: -webkit-box;
  overflow: hidden;
  margin: 0.75rem 0 1rem;
  color: var(--color-muted);
  font-size: 0.86rem;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.related-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 700;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  padding-block: clamp(1.5rem, 3vw, 2rem) clamp(2.5rem, 5vw, 4rem);
}

.post-nav-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.45rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  color: var(--color-text);
  padding: 1.15rem;
  text-decoration: none;
  transition:
    border-color var(--transition-normal),
    background-color var(--transition-normal),
    transform var(--transition-normal);
}

.post-nav-card:hover {
  border-color: var(--color-accent-dark);
  background: color-mix(in srgb, var(--color-accent) 9%, var(--color-panel));
  transform: translateY(-2px);
}

.post-nav-card:last-child {
  text-align: right;
}

.post-nav-label {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.post-nav-card strong {
  font-size: 0.95rem;
  line-height: 1.55;
}

body.modal-open {
  overflow: hidden;
}

.signup-modal {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--blog-gutter);
  visibility: hidden;
}

.signup-modal.is-open {
  visibility: visible;
}

.signup-modal-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  border: 0;
  background: var(--color-overlay);
  cursor: default;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.signup-modal.is-open .signup-modal-backdrop {
  opacity: 1;
}

.signup-modal-panel {
  position: relative;
  width: min(100%, 31rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background:
    linear-gradient(var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-soft) 1px, transparent 1px),
    var(--color-panel);
  background-size: 24px 24px, 24px 24px, auto;
  box-shadow: var(--blog-shadow-hover);
  opacity: 0;
  padding: clamp(1.6rem, 5vw, 2.5rem);
  transform: translateY(12px) scale(0.98);
  transition:
    opacity var(--transition-normal),
    transform var(--transition-normal);
}

.signup-modal.is-open .signup-modal-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.signup-modal-close {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text);
  cursor: pointer;
  font: 500 1.35rem/1 var(--font-body);
}

.signup-modal-close:hover,
.signup-modal-close:focus-visible {
  border-color: var(--color-text);
}

.signup-modal-eyebrow {
  margin: 0 0 0.8rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.signup-modal-panel h2 {
  max-width: calc(100% - 2.5rem);
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 5vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.25;
  text-wrap: pretty;
}

.signup-modal-panel > p:not(.signup-modal-eyebrow) {
  margin: 1rem 0 0;
  color: var(--color-muted);
  line-height: 1.8;
}

.signup-modal-actions {
  display: flex;
  margin-top: 1.5rem;
}

.signup-modal-primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-text);
}

.signup-modal-primary:hover {
  border-color: var(--color-accent-dark);
  background: var(--color-accent-dark);
  color: var(--color-text);
}

@media (max-width: 860px) {
  .article-list {
    grid-template-columns: 1fr;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .prose table,
  .data-table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }
}

@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }

  .blog-hero::after {
    opacity: 0.35;
  }

  .blog-list-heading {
    display: block;
  }

  .blog-list-heading > p {
    margin-top: 0.8rem;
  }

  .article-card {
    min-height: 0;
  }

  .article-hero {
    padding-inline: var(--blog-gutter);
  }

  .prose h2 {
    margin-top: 2.6rem;
  }

  .prose h2::before {
    display: block;
    margin: 0 0 0.35rem;
  }

  .stat-grid {
    grid-template-columns: 1fr;
  }

  .promo-block {
    align-items: flex-start;
    flex-direction: column;
  }

  .promo-block .signup-modal-actions {
    width: 100%;
    flex-direction: column;
    gap: 0.75rem;
  }

  .promo-block .signup-modal-actions .btn {
    width: 100%;
    justify-content: center;
  }

  #post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-card:last-child {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-card,
  .article-card::before,
  .related-card,
  .related-card::before,
  .post-nav-card,
  .signup-modal-backdrop,
  .signup-modal-panel {
    scroll-behavior: auto;
    transition-duration: 0.01ms;
  }

  .article-card:hover,
  .related-card:hover,
  .post-nav-card:hover,
  .signup-modal-panel,
  .signup-modal.is-open .signup-modal-panel {
    transform: none;
  }
}