:root {
  --font-display: "Inter", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;

  --color-bg: #fff7ec;
  --color-panel: #fffcf7;
  --color-panel-muted: #f2ece4;
  --color-border: #e8ddd1;
  --color-accent: #f29a52;
  --color-accent-dark: #c8682e;
  --color-text: #332e29;
  --color-muted: #756d65;
  --color-success: #4e8a69;
  --color-warn: #b8742d;
  --color-error: #b9574f;
  --color-white: #ffffff;
  --color-transparent: transparent;
  --color-glass: rgba(255, 252, 247, 0.78);
  --color-glass-strong: rgba(255, 255, 255, 0.9);
  --color-glass-soft: rgba(255, 255, 255, 0.56);
  --color-accent-soft: rgba(242, 154, 82, 0.12);
  --color-accent-medium: rgba(242, 154, 82, 0.24);
  --color-accent-glow: rgba(242, 154, 82, 0.38);
  --color-selected: rgba(242, 154, 82, 0.18);
  --color-success-soft: rgba(78, 138, 105, 0.13);
  --color-overlay: rgba(51, 46, 41, 0.72);
  --color-overlay-soft: rgba(51, 46, 41, 0.08);
  --color-dawn-light: rgba(255, 225, 181, 0.72);
  --color-dawn-warm: rgba(242, 154, 82, 0.42);
  --color-dark-panel: #4a3529;
  --color-dark-panel-muted: #674735;
  --color-on-dark: #fffaf3;
  --color-on-dark-muted: #f2dfd0;

  --radius-xs: 0.35rem;
  --radius-sm: 0.65rem;
  --radius-md: 1rem;
  --radius-lg: 1.4rem;
  --radius-xl: 2rem;
  --radius-pill: 999rem;

  --shadow-nav: 0 0.5rem 1.8rem rgba(51, 46, 41, 0.08);
  --shadow-window: 0 2rem 5rem rgba(103, 71, 53, 0.18);
  --shadow-card: 0 0.8rem 2.2rem rgba(51, 46, 41, 0.08);
  --shadow-card-high: 0 1.25rem 3rem rgba(51, 46, 41, 0.13);
  --shadow-button: 0 0.6rem 1.2rem rgba(200, 104, 46, 0.2);
  --shadow-taskbar: 0 0.8rem 2.4rem rgba(51, 46, 41, 0.12);

  --header-height: 4.5rem;
  --content-width: 74rem;
  --reading-width: 48rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  --section-space: clamp(4rem, 8vw, 7rem);
  --toc-offset: 6rem;
}

.blog-index-page {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}

.blog-list-hero {
  position: relative;
  min-height: min(46rem, calc(100vh - var(--header-height)));
  padding: clamp(2.5rem, 7vw, 5.5rem) 0 2rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 20%, var(--color-dawn-light), var(--color-transparent) 36%),
    radial-gradient(circle at 82% 35%, var(--color-dawn-warm), var(--color-transparent) 32%),
    linear-gradient(145deg, var(--color-bg), var(--color-panel-muted));
}

.blog-dawn-orb {
  position: absolute;
  border-radius: var(--radius-pill);
  pointer-events: none;
  filter: blur(0.2rem);
}

.blog-dawn-orb-left {
  width: clamp(12rem, 26vw, 24rem);
  height: clamp(12rem, 26vw, 24rem);
  left: -8rem;
  bottom: -5rem;
  background: var(--color-dawn-light);
}

.blog-dawn-orb-right {
  width: clamp(14rem, 30vw, 28rem);
  height: clamp(14rem, 30vw, 28rem);
  right: -7rem;
  top: 4rem;
  background: var(--color-dawn-warm);
}

.blog-list-hero .wrap {
  position: relative;
  z-index: 1;
}

.blog-window {
  max-width: 66rem;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--color-glass-strong);
  border-radius: var(--radius-xl);
  background: var(--color-glass);
  box-shadow: var(--shadow-window);
  backdrop-filter: blur(1.5rem);
}

.blog-window-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  min-height: 3.4rem;
  padding: 0.7rem 1.1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.window-controls {
  display: flex;
  gap: 0.45rem;
}

.window-controls span {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent-medium);
}

.window-controls span:first-child {
  background: var(--color-accent);
}

.window-controls span:last-child {
  background: var(--color-success-soft);
}

.window-title {
  text-align: center;
}

.window-status {
  justify-self: end;
}

.blog-window-content {
  padding: clamp(2rem, 6vw, 5rem);
}

.blog-hero-copy {
  max-width: 52rem;
}

.blog-list-hero h1 {
  max-width: 50rem;
  margin: 1rem 0 1.25rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 6vw, 3rem);
  font-weight: 350;
  letter-spacing: -0.02em;
  line-height: 1.12;
  text-wrap: pretty;
}

.blog-hero-copy > p {
  max-width: 43rem;
  margin: 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 2vw, 1.12rem);
  line-height: 1.8;
}

.blog-guide-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: clamp(2rem, 5vw, 4rem);
}

.blog-guide-strip > div {
  position: relative;
  min-width: 0;
  padding: 1rem 1rem 1rem 2.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-glass-soft);
}

.blog-guide-strip strong,
.blog-guide-strip small {
  display: block;
}

.blog-guide-strip strong {
  margin-bottom: 0.25rem;
  font-size: 0.94rem;
}

.blog-guide-strip small {
  overflow: hidden;
  color: var(--color-muted);
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.guide-marker {
  position: absolute;
  top: 1.12rem;
  left: 1rem;
  width: 0.72rem;
  height: 0.72rem;
  border: 0.2rem solid var(--color-accent-medium);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.blog-taskbar {
  display: flex;
  align-items: center;
  width: max-content;
  max-width: calc(100% - 2rem);
  min-height: 3.2rem;
  margin: 1.4rem auto 0;
  padding: 0.5rem 1rem;
  gap: 0.65rem;
  border: 1px solid var(--color-glass-strong);
  border-radius: var(--radius-md);
  background: var(--color-glass);
  box-shadow: var(--shadow-taskbar);
  backdrop-filter: blur(1rem);
}

.taskbar-brand {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-display);
  font-weight: 700;
}

.taskbar-item {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-xs);
  background: var(--color-panel-muted);
}

.taskbar-divider {
  width: 1px;
  height: 1.5rem;
  background: var(--color-border);
}

.taskbar-label {
  color: var(--color-muted);
  font-size: 0.78rem;
}

.blog-library-section {
  background: var(--color-panel);
}

.blog-library-section .section-heading h2,
.blog-service-note h2 {
  text-wrap: pretty;
}

.blog-filter-shell {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  margin: 2.25rem 0 1.5rem;
  padding: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel-muted);
}

.blog-filter-label {
  padding: 0.7rem 0.8rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
}

.blog-filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.blog-filter-button {
  min-height: 2.4rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--color-transparent);
  border-radius: var(--radius-pill);
  background: var(--color-transparent);
  color: var(--color-muted);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.blog-filter-button:hover {
  border-color: var(--color-border);
  background: var(--color-glass-soft);
  color: var(--color-text);
}

.blog-filter-button:focus-visible {
  outline: 0.18rem solid var(--color-accent-medium);
  outline-offset: 0.12rem;
}

.blog-filter-button.is-active {
  border-color: var(--color-accent-medium);
  background: var(--color-selected);
  color: var(--color-accent-dark);
}

.blog-card-list {
  display: grid;
  gap: 1rem;
}

.article-card {
  display: grid;
  grid-template-columns: minmax(9rem, 0.3fr) minmax(16rem, 1fr) auto;
  grid-template-areas:
    "meta title link"
    "meta summary link";
  gap: 0.4rem 2rem;
  align-items: center;
  padding: clamp(1.3rem, 3vw, 2rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.article-card:hover {
  border-color: var(--color-accent-medium);
  box-shadow: var(--shadow-card-high);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.article-card .article-meta {
  grid-area: meta;
  align-self: start;
}

.article-card h3 {
  grid-area: title;
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  letter-spacing: -0.01em;
  line-height: 1.45;
  text-wrap: pretty;
}

.article-card h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.article-card h3 a:hover {
  color: var(--color-accent-dark);
}

.article-card p {
  grid-area: summary;
  margin: 0.25rem 0 0;
  color: var(--color-muted);
  font-size: 0.94rem;
  line-height: 1.75;
}

.article-link {
  grid-area: link;
  color: var(--color-accent-dark);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
}

.article-link:hover {
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.blog-empty,
.blog-noscript {
  margin: 1rem 0 0;
  padding: 1.2rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  text-align: center;
}

.blog-service-note {
  background: var(--color-panel);
}

.blog-info-band {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 3.5rem);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-dark-panel), var(--color-dark-panel-muted));
  color: var(--color-on-dark);
  box-shadow: var(--shadow-card-high);
}

.blog-info-band h2 {
  margin: 0.8rem 0 0.65rem;
  color: var(--color-on-dark);
}

.blog-info-band p {
  max-width: 42rem;
  margin: 0;
  color: var(--color-on-dark-muted);
  line-height: 1.75;
}

.eyebrow-light {
  color: var(--color-on-dark-muted);
}

.button-on-dark {
  border-color: var(--color-on-dark-muted);
  color: var(--color-on-dark);
}

/* Article page */
.blog-breadcrumb {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 0;
}

.blog-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
  font-size: 0.84rem;
}

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

.blog-breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
}

.blog-breadcrumb a:hover {
  color: var(--color-accent-dark);
}

.post-hero {
  padding: clamp(2.25rem, 6vw, 4.5rem) var(--gutter);
}

.post-hero-inner {
  max-width: var(--reading-width);
  margin: 0 auto;
}

.post-hero .article-meta {
  margin-bottom: 1rem;
}

.post-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 520;
  letter-spacing: -0.02em;
  line-height: 1.22;
  text-wrap: pretty;
}

.post-summary {
  margin: 1.25rem 0 0;
  color: var(--color-muted);
  font-size: 1.04rem;
  line-height: 1.85;
}

.reading-wrap {
  width: min(calc(100% - (var(--gutter) * 2)), var(--reading-width));
  margin-right: auto;
  margin-left: auto;
}

.prose {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.85;
}

.prose h1,
.prose h2,
.prose h3 {
  font-family: var(--font-display);
  letter-spacing: -0.015em;
  line-height: 1.4;
  text-wrap: pretty;
}

.prose h2 {
  margin: 2.8rem 0 1rem;
  font-size: clamp(1.35rem, 3vw, 1.6rem);
}

.prose h3 {
  margin: 2rem 0 0.8rem;
  font-size: clamp(1.12rem, 2vw, 1.3rem);
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre {
  margin-top: 0;
  margin-bottom: 1.35rem;
}

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

.prose li + li {
  margin-top: 0.45rem;
}

.prose a {
  color: var(--color-accent-dark);
  text-underline-offset: 0.22rem;
}

.prose blockquote {
  padding: 1rem 1.25rem;
  border-left: 0.25rem solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--color-accent-soft);
  color: var(--color-muted);
}

.prose pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel-muted);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.prose :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border-radius: var(--radius-xs);
  background: var(--color-panel-muted);
}

.promo-block {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  max-width: var(--reading-width);
  margin: 3.5rem auto;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--color-accent-medium);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-panel));
  box-shadow: var(--shadow-card);
}

.promo-block h2 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.promo-block p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.75;
}

#related-posts {
  max-width: var(--content-width);
  margin: 4rem auto 0;
  padding: 0 var(--gutter);
}

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

.related-intro {
  margin: 0.6rem 0 1.5rem;
  color: var(--color-muted);
}

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

.related-card {
  padding: 1.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.related-card h3 {
  margin: 0.9rem 0 0.65rem;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
  line-height: 1.5;
  text-wrap: pretty;
}

.related-card h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.related-card h3 a:hover {
  color: var(--color-accent-dark);
}

.related-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: var(--content-width);
  margin: 1rem auto 5rem;
  padding: 0 var(--gutter);
}

.post-nav-link {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  color: var(--color-text);
  text-decoration: none;
}

.post-nav-link:hover {
  border-color: var(--color-accent-medium);
  box-shadow: var(--shadow-card);
}

.post-nav-direction {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.post-nav-link strong {
  font-size: 0.98rem;
  line-height: 1.55;
  text-wrap: pretty;
}

.post-nav-next {
  grid-column: 2;
  text-align: right;
}

@media (max-width: 52rem) {
  .blog-guide-strip {
    grid-template-columns: 1fr;
  }

  .article-card {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "meta meta"
      "title title"
      "summary summary"
      "link link";
    gap: 0.7rem;
  }

  .article-card .article-meta {
    align-self: auto;
  }

  .article-link {
    margin-top: 0.25rem;
  }

  .blog-info-band,
  .promo-block {
    align-items: flex-start;
    flex-direction: column;
  }

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

.float-cta {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 30;
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent-dark);
  color: var(--color-white);
  box-shadow: var(--shadow-card-high);
  font-weight: 700;
  text-decoration: none;
}

.float-cta:hover,
.float-cta:focus-visible {
  background: var(--color-dark-panel);
  color: var(--color-white);
}

@media (max-width: 38rem) {
  .blog-list-hero {
    min-height: auto;
    padding-top: 1.25rem;
  }

  .blog-window {
    border-radius: var(--radius-lg);
  }

  .blog-window-bar {
    grid-template-columns: 1fr auto;
  }

  .window-title {
    display: none;
  }

  .blog-window-content {
    padding: 1.5rem;
  }

  .blog-filter-shell {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .blog-filter-label {
    padding-bottom: 0.2rem;
  }

  .blog-filter-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.35rem;
    scrollbar-width: thin;
  }

  .blog-filter-button {
    flex: 0 0 auto;
  }

  .blog-info-band .button-row {
    width: 100%;
  }

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

  .post-nav-next {
    grid-column: 1;
    text-align: left;
  }
}