:root {
  --color-bg: #eef5ef;
  --color-surface: #f8fcf8;
  --color-surface-2: #e7f0e7;
  --color-text: #0f180f;
  --color-muted: #3f5140;
  --color-border: #c4d4c4;
  --color-primary: #1f7a46;
  --color-primary-strong: #145531;
  --color-accent: #2d9a57;

  --font-sans: "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.08);

  --container: 1100px;
  --focus-ring: 0 0 0 3px rgba(31, 122, 70, 0.28);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #050705;
    --color-surface: #0c120d;
    --color-surface-2: #111a13;
    --color-text: #e7f3e8;
    --color-muted: #9cb59f;
    --color-border: #253326;
    --color-primary: #37a35f;
    --color-primary-strong: #58c57f;
    --color-accent: #66d88f;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 14px 35px rgba(0, 0, 0, 0.35);
    --focus-ring: 0 0 0 3px rgba(68, 177, 109, 0.36);
  }
}

html[data-theme="light"] {
  --color-bg: #eef5ef;
  --color-surface: #f8fcf8;
  --color-surface-2: #e7f0e7;
  --color-text: #0f180f;
  --color-muted: #3f5140;
  --color-border: #c4d4c4;
  --color-primary: #1f7a46;
  --color-primary-strong: #145531;
  --color-accent: #2d9a57;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.08);
  --focus-ring: 0 0 0 3px rgba(31, 122, 70, 0.28);
}

html[data-theme="dark"] {
  --color-bg: #050705;
  --color-surface: #0c120d;
  --color-surface-2: #111a13;
  --color-text: #e7f3e8;
  --color-muted: #9cb59f;
  --color-border: #253326;
  --color-primary: #37a35f;
  --color-primary-strong: #58c57f;
  --color-accent: #66d88f;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 14px 35px rgba(0, 0, 0, 0.35);
  --focus-ring: 0 0 0 3px rgba(68, 177, 109, 0.36);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: -999px;
  background: var(--color-surface);
  color: var(--color-text);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  z-index: 200;
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
  box-shadow: var(--focus-ring);
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: var(--space-10) auto;
  flex: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 84%, transparent);
  backdrop-filter: blur(8px);
}

@supports not (background: color-mix(in srgb, white 50%, black)) {
  .site-header {
    background: var(--color-bg);
  }
}

.nav-wrap {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.menu-toggle,
.theme-toggle {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font: inherit;
  cursor: pointer;
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.site-nav-panel {
  display: none;
}

.site-nav-panel.is-open {
  display: flex;
}

.site-nav-panel {
  position: absolute;
  left: 1rem;
  right: 1rem;
  top: 72px;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.site-nav-panel a {
  color: var(--color-muted);
  text-decoration: none;
  font-weight: 600;
  padding: 0.55rem 0.65rem;
  border-radius: var(--radius-sm);
}

.site-nav-panel a:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.site-nav-panel a:focus-visible,
.menu-toggle:focus-visible,
.theme-toggle:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

@media (min-width: 840px) {
  .menu-toggle {
    display: none;
  }

  .site-nav-panel,
  .site-nav-panel.is-open {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
    padding: 0;
    box-shadow: none;
    border: 0;
    background: transparent;
  }

  .site-nav-panel .theme-toggle {
    margin-left: var(--space-2);
  }
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-3);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
  font-size: clamp(1.45rem, 2.6vw, 2rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 var(--space-4);
}

a {
  color: var(--color-accent);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-primary-strong);
}

code,
pre {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

pre {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  overflow-x: auto;
  margin: 0 0 var(--space-5);
}

code {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.08em 0.35em;
}

pre code {
  border: 0;
  padding: 0;
  background: transparent;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-10) 0;
}

.section {
  margin: var(--space-10) 0;
}

.kicker {
  display: inline-block;
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-muted);
}

.section-title {
  margin-bottom: var(--space-4);
}

.muted,
.meta {
  color: var(--color-muted);
}

.meta {
  font-size: 0.95rem;
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid.cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid.cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-border));
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 1px solid transparent;
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  border-radius: var(--radius-sm);
  padding: 0.62rem 1rem;
  transition: transform 0.18s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  background: var(--color-primary-strong);
  color: #fff;
  transform: translateY(-1px);
}

.btn.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn.btn-secondary:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.btn.btn-small {
  padding: 0.45rem 0.75rem;
  font-size: 0.92rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.badge,
.pill,
.chip {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-muted);
  font-size: 0.82rem;
  line-height: 1;
  padding: 0.38rem 0.62rem;
}

.chip {
  cursor: pointer;
  background: var(--color-surface);
}

.chip.is-active,
.chip:hover {
  border-color: color-mix(in srgb, var(--color-primary) 55%, var(--color-border));
  color: var(--color-primary-strong);
  background: color-mix(in srgb, var(--color-primary) 12%, var(--color-surface));
}

.hero {
  display: grid;
  gap: var(--space-6);
  padding: var(--space-10);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.hero p {
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

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

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-inner {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  padding: var(--space-6) 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--color-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-primary-strong);
}

.post-shell {
  max-width: 860px;
  margin: 0 auto;
}

.post-content {
  margin-top: var(--space-6);
}

.post-content blockquote {
  margin: 0 0 var(--space-5);
  padding: var(--space-3) var(--space-4);
  border-left: 4px solid var(--color-primary);
  background: var(--color-surface-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 var(--space-5);
  border: 1px solid var(--color-border);
}

.post-content th,
.post-content td {
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 0.75rem;
  text-align: left;
}

.post-content th {
  background: var(--color-surface-2);
}

.post-pagination {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.post-pagination a {
  max-width: 48%;
}

.filter-bar {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.search-input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.65rem 0.8rem;
  font: inherit;
}

.empty-state {
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-border);
  color: var(--color-muted);
  text-align: center;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 640px) {
  .container {
    width: calc(100% - 1rem);
    margin: var(--space-6) auto;
  }

  .hero {
    padding: var(--space-6);
  }

  .post-pagination {
    flex-direction: column;
  }

  .post-pagination a {
    max-width: none;
  }
}


#postList.blog-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.post-card {
  display: flex;
  flex-direction: column;
}

.post-card .btn {
  margin-top: auto;
}

.blog-card-title {
  overflow-wrap: anywhere;
  word-break: break-word;
}

@media (max-width: 960px) {
  #postList.blog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  #postList.blog-grid {
    grid-template-columns: 1fr;
  }
}


/* Ensure filtered cards are always hidden even when card display is flex */
.post-card[hidden],
.post-card.is-hidden {
  display: none !important;
}