/* Persian AI Mag — Material Design 3 (pure CSS implementation)
   Tokens follow the official MD3 color roles (baseline purple seed). */

/* ---------- Fonts (self-hosted, zero external requests) ---------- */
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-ExtraBold.woff2') format('woff2');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

/* ---------- MD3 color tokens — Light (white / black / light-blue accent) ---------- */
:root {
  --md-primary: #2196f3;
  --md-on-primary: #ffffff;
  --md-primary-container: #e3f2fd;
  --md-on-primary-container: #0d47a1;

  --md-secondary: #1e88e5;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #e3f2fd;
  --md-on-secondary-container: #0d47a1;

  --md-tertiary: #1e88e5;
  --md-tertiary-container: #e3f2fd;
  --md-on-tertiary-container: #0d47a1;

  --md-surface: #ffffff;
  --md-on-surface: #000000;
  --md-surface-variant: #f0f0f0;
  --md-on-surface-variant: #5f5f5f;

  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #fafafa;
  --md-surface-container: #f5f5f5;
  --md-surface-container-high: #f0f0f0;
  --md-surface-container-highest: #e8e8e8;

  --md-outline: #8f8f8f;
  --md-outline-variant: #e0e0e0;

  --md-inverse-surface: #1e1e1e;
  --md-inverse-on-surface: #ffffff;

  --md-error: #d32f2f;

  /* Shape scale */
  --r-xs: 4px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 28px;
  --r-full: 999px;

  /* Elevation */
  --elev-1: 0 1px 2px rgba(0, 0, 0, .12), 0 1px 3px 1px rgba(0, 0, 0, .08);
  --elev-2: 0 1px 2px rgba(0, 0, 0, .14), 0 2px 6px 2px rgba(0, 0, 0, .08);
  --elev-3: 0 1px 3px rgba(0, 0, 0, .14), 0 4px 8px 3px rgba(0, 0, 0, .10);

  /* Motion */
  --ease-standard: cubic-bezier(.2, 0, 0, 1);
  --dur-1: 120ms;
  --dur-2: 220ms;

  --state-hover: rgba(0, 0, 0, .06);
  --state-press: rgba(0, 0, 0, .10);
}

/* ---------- MD3 color tokens — Dark (black / white / light-blue accent) ---------- */
html[data-theme="dark"] {
  --md-primary: #64b5f6;
  --md-on-primary: #000000;
  --md-primary-container: #0d47a1;
  --md-on-primary-container: #e3f2fd;

  --md-secondary: #90caf9;
  --md-on-secondary: #000000;
  --md-secondary-container: #0d47a1;
  --md-on-secondary-container: #e3f2fd;

  --md-tertiary: #90caf9;
  --md-tertiary-container: #0d47a1;
  --md-on-tertiary-container: #e3f2fd;

  --md-surface: #000000;
  --md-on-surface: #ffffff;
  --md-surface-variant: #1e1e1e;
  --md-on-surface-variant: #b3b3b3;

  --md-surface-container-lowest: #000000;
  --md-surface-container-low: #0d0d0d;
  --md-surface-container: #121212;
  --md-surface-container-high: #1a1a1a;
  --md-surface-container-highest: #222222;

  --md-outline: #808080;
  --md-outline-variant: #2e2e2e;

  --md-inverse-surface: #ffffff;
  --md-inverse-on-surface: #000000;

  --md-error: #ef5350;

  --state-hover: rgba(255, 255, 255, .08);
  --state-press: rgba(255, 255, 255, .12);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: 'Vazirmatn', 'Segoe UI', Tahoma, sans-serif;
  background: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.9;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

img { max-width: 100%; height: auto; }
svg { max-width: 100%; }

a { color: var(--md-primary); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 4px; }

::selection { background: var(--md-primary-container); color: var(--md-on-primary-container); }

:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

.container {
  width: 100%;
  max-width: 52rem;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* ---------- Typography scale (MD3, tuned for Persian) ---------- */
.display-small { font-size: clamp(1.75rem, 4.5vw, 2.5rem); font-weight: 800; line-height: 1.6; }
.headline-small { font-size: 1.5rem; font-weight: 700; line-height: 1.6; }
.title-large { font-size: 1.375rem; font-weight: 700; line-height: 1.7; }
.title-medium { font-size: 1.063rem; font-weight: 600; }
.body-large { font-size: 1.063rem; }
.body-medium { font-size: .938rem; }
.label-large { font-size: .875rem; font-weight: 500; }
.label-medium { font-size: .813rem; font-weight: 500; }
.muted { color: var(--md-on-surface-variant); }

/* ---------- Top app bar ---------- */
.top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--md-surface) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: box-shadow var(--dur-2) var(--ease-standard);
  /* iOS safe area */
  padding-top: env(safe-area-inset-top, 0);
}
.top-bar.is-scrolled { box-shadow: var(--elev-2); }

.top-bar__inner {
  display: flex;
  align-items: center;
  gap: .5rem;
  height: 64px;
}

.top-bar__brand {
  display: inline-flex;
  align-items: center;
  gap: .625rem;
  color: var(--md-on-surface);
  font-weight: 700;
  font-size: 1.125rem;
  margin-inline-end: auto;
}
.top-bar__brand:hover { text-decoration: none; }
.top-bar__logo { width: 34px; height: 34px; border-radius: 8px; flex-shrink: 0; object-fit: contain; display: block; }

.top-bar__nav { display: flex; gap: .25rem; }

.top-bar__link {
  color: var(--md-on-surface-variant);
  font-size: .938rem;
  font-weight: 500;
  padding: .5rem 1rem;
  border-radius: var(--r-full);
  transition: background-color var(--dur-1) var(--ease-standard), color var(--dur-1) var(--ease-standard);
}
.top-bar__link:hover { background: var(--state-hover); text-decoration: none; color: var(--md-on-surface); }
.top-bar__link[aria-current="page"] {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

@media (max-width: 639px) {
  .top-bar__nav { display: none; }
}

/* ---------- Search (top bar) ---------- */
.search { position: relative; margin-inline: auto; width: min(340px, 42vw); }

.search input {
  width: 100%;
  height: 44px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--r-full);
  background: var(--md-surface-container-high);
  color: var(--md-on-surface);
  font-family: inherit;
  font-size: .906rem;
  padding-inline: 1rem 2.75rem;
  outline: none;
  transition: border-color var(--dur-1) var(--ease-standard), background-color var(--dur-1) var(--ease-standard);
}
.search input::placeholder { color: var(--md-on-surface-variant); }
.search input:focus { border-color: var(--md-primary); background: var(--md-surface-container-lowest); }

.search__icon {
  position: absolute;
  inset-inline-end: .875rem;
  top: 50%;
  transform: translateY(-50%);
  width: 19px;
  height: 19px;
  fill: var(--md-on-surface-variant);
  pointer-events: none;
}

.search__results {
  display: none;
  position: absolute;
  top: calc(100% + .375rem);
  inset-inline: 0;
  background: var(--md-surface-container-lowest);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--r-md);
  box-shadow: var(--elev-3);
  overflow: hidden;
  z-index: 60;
}
.search__results.is-open { display: block; }

.search-result {
  display: block;
  padding: .7rem 1rem;
  color: var(--md-on-surface);
  font-size: .906rem;
  border-bottom: 1px solid color-mix(in srgb, var(--md-outline-variant) 50%, transparent);
}
.search-result:last-child { border-bottom: none; }
.search-result:hover { background: var(--state-hover); text-decoration: none; color: var(--md-primary); }

.search-empty {
  padding: .7rem 1rem;
  font-size: .875rem;
  color: var(--md-on-surface-variant);
}

@media (max-width: 639px) {
  .search { width: 100%; margin-inline: 0; }
}

/* ---------- More-articles section (bottom of every post) ---------- */
.more-posts { margin-block: 2.5rem; }
.more-posts > h2 { font-size: 1.375rem; margin-bottom: 1rem; }
.more-posts .post-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 600px) {
  .more-posts .post-grid { grid-template-columns: 1fr; }
}



/* Search toggle (mobile icon) */
.search-toggle {
  display: none; /* desktop: hidden, search always visible */
  flex-shrink: 0;
}
.search-toggle svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

@media (max-width: 719px) {
  .search-toggle { display: inline-flex; }
  .search {
    display: none;
    position: absolute;
    left: .75rem;
    right: .75rem;
    top: 100%;
    width: auto;
    margin: 0;
    padding: .5rem 0 .75rem;
    z-index: 60;
  }
  .search.is-open {
    display: block;
  }
  .search input {
    height: 48px;
    font-size: 1rem;
    box-shadow: var(--elev-2);
  }
  .top-bar {
    position: sticky;
    top: 0;
  }
  /* when search open, bar can show panel below without unstick */
  .top-bar__inner {
    position: relative;
  }
}

@media (min-width: 720px) {
  .search-toggle { display: none !important; }
  .search {
    display: block;
    position: relative;
    margin-inline: auto;
    width: min(340px, 42vw);
  }
}

/* hide bottom-nav styles leftover unused is fine */

/* ---------- Icon button ---------- */
.icon-btn {
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--r-full);
  background: transparent;
  color: var(--md-on-surface-variant);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  transition: background-color var(--dur-1) var(--ease-standard);
}
.icon-btn:hover { background: var(--state-hover); }
.icon-btn svg { width: 22px; height: 22px; fill: currentColor; }

html[data-theme="dark"] .icon-sun { display: block; }
html[data-theme="dark"] .icon-moon { display: none; }
html:not([data-theme="dark"]) .icon-sun { display: none; }
html:not([data-theme="dark"]) .icon-moon { display: block; }

/* ---------- Bottom navigation (mobile, MD3) ---------- */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  inset-inline: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--md-surface-container) 94%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: .5rem .5rem calc(.5rem + env(safe-area-inset-bottom));
}

/* bottom-nav removed */

.bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .25rem;
  padding: .25rem 0;
  color: var(--md-on-surface-variant);
  font-size: .75rem;
  font-weight: 500;
  border-radius: var(--r-md);
  text-decoration: none;
}
.bottom-nav__item:hover { text-decoration: none; }

.bottom-nav__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 30px;
  border-radius: var(--r-full);
  transition: background-color var(--dur-1) var(--ease-standard), color var(--dur-1) var(--ease-standard);
}
.bottom-nav__icon svg { width: 20px; height: 20px; fill: currentColor; }

.bottom-nav__item.is-active { color: var(--md-on-surface); }
.bottom-nav__item.is-active .bottom-nav__icon {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

/* ---------- Ripple ---------- */
.r { position: relative; overflow: hidden; }
.ripple {
  position: absolute;
  border-radius: 50%;
  background: currentColor;
  opacity: .14;
  transform: scale(0);
  animation: ripple .55s var(--ease-standard) forwards;
  pointer-events: none;
}
@keyframes ripple { to { transform: scale(2.6); opacity: 0; } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  height: 44px;
  padding-inline: 1.5rem;
  border: none;
  border-radius: var(--r-full);
  font-family: inherit;
  font-size: .938rem;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  transition: box-shadow var(--dur-1) var(--ease-standard), background-color var(--dur-1) var(--ease-standard), color var(--dur-1) var(--ease-standard);
}
.btn:hover { text-decoration: none; }
.btn svg { width: 18px; height: 18px; fill: currentColor; }

.btn--filled { background: var(--md-primary); color: var(--md-on-primary); }
.btn--filled:hover { box-shadow: var(--elev-1); background: color-mix(in srgb, var(--md-on-primary) 8%, var(--md-primary)); }

.btn--tonal { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.btn--tonal:hover { box-shadow: var(--elev-1); background: color-mix(in srgb, var(--md-on-secondary-container) 8%, var(--md-secondary-container)); }

.btn--text { background: transparent; color: var(--md-primary); padding-inline: .875rem; }
.btn--text:hover { background: color-mix(in srgb, var(--md-primary) 8%, transparent); }

/* ---------- Chips ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  height: 30px;
  padding-inline: .875rem;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--r-full);
  font-size: .813rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  background: transparent;
  white-space: nowrap;
}
a.chip:hover { background: var(--state-hover); text-decoration: none; border-color: var(--md-outline); }
.chip--dot::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--md-primary);
}

/* ---------- Hero (home) ---------- */
.hero { padding-block: 2.5rem 0; }
.hero h1 { margin: 0; }
.hero h1 em { font-style: normal; color: var(--md-primary); }

@media (max-width: 639px) {
  .top-bar__inner {
    flex-wrap: nowrap;
    height: 56px;
    padding-block: 0;
  }
  .top-bar__brand span { font-size: .95rem; }
}

/* ---------- Sections & article cards ---------- */
.section { margin-block: 3rem; }
.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.section__head h2 { margin: 0; }

.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 640px) {
  .post-grid { grid-template-columns: 1fr 1fr; }
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--md-surface-container-low);
  border-radius: var(--r-lg);
  overflow: hidden;
  color: var(--md-on-surface);
  position: relative;
  transition: box-shadow var(--dur-2) var(--ease-standard), background-color var(--dur-2) var(--ease-standard), transform var(--dur-2) var(--ease-standard);
}
.post-card:hover {
  text-decoration: none;
  box-shadow: var(--elev-2);
  background: color-mix(in srgb, var(--md-primary) 5%, var(--md-surface-container-low));
  transform: translateY(-2px);
}

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

.post-card__body { padding: 1rem 1.25rem 1.125rem; }
.post-card h3 { margin: 0 0 .375rem; font-size: 1.125rem; font-weight: 700; line-height: 1.75; }
.post-card__meta {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .813rem;
  color: var(--md-on-surface-variant);
}
.post-card__meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--md-outline); flex-shrink: 0; }

/* ---------- Post header ---------- */
.post-header { padding-block: 2.5rem .5rem; }
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .813rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 1rem;
}
.breadcrumbs a { color: var(--md-on-surface-variant); }
.breadcrumbs svg { width: 14px; height: 14px; fill: currentColor; transform: rotate(180deg); }
.post-header h1 { margin: 0 0 1rem; font-size: clamp(1.6rem, 4.5vw, 2.25rem); font-weight: 800; line-height: 1.65; }
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .625rem;
  color: var(--md-on-surface-variant);
  font-size: .875rem;
  margin-bottom: 1.25rem;
}
.post-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--md-outline); }

/* ---------- TL;DR box (GEO) ---------- */
.tl-dr {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-radius: var(--r-lg);
  padding: 1.25rem;
  margin-block: 1.5rem;
}
.tl-dr strong { display: block; margin-bottom: .25rem; }
.tl-dr p { margin: 0; }

/* ---------- Article prose ---------- */
.prose { padding-bottom: 1rem; }
.prose > h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.5rem 0 .875rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--md-outline-variant);
}
.prose > h3 { font-size: 1.188rem; font-weight: 700; margin: 1.9rem 0 .625rem; }
.prose p { margin: 1rem 0; font-size: 1.063rem; }
.prose ul, .prose ol { margin: 1rem 0; padding-inline-start: 1.5rem; }
.prose li { margin-block: .4rem; font-size: 1.031rem; }
.prose img { border-radius: var(--r-md); margin-block: 1.25rem; }

.prose figure {
  margin: 1.75rem auto;
  width: min(100%, 34rem);
}
.prose figure img {
  display: block;
  width: 100%;
  border-radius: var(--r-md);
}
.prose figcaption {
  margin-top: .5rem;
  text-align: center;
  font-size: .813rem;
  color: var(--md-on-surface-variant);
}

.prose blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: color-mix(in srgb, var(--md-primary) 7%, var(--md-surface));
  border-inline-start: 4px solid var(--md-primary);
  border-radius: var(--r-sm);
  color: var(--md-on-surface);
}
.prose blockquote p { margin: .25rem 0; }

.callout {
  display: flex;
  gap: .75rem;
  background: var(--md-surface-container);
  border-radius: var(--r-lg);
  padding: 1.125rem 1.25rem;
  margin: 1.5rem 0;
  font-size: .938rem;
}
.callout svg { width: 20px; height: 20px; fill: var(--md-tertiary); flex-shrink: 0; margin-top: .35rem; }
.callout p { margin: 0; }

/* Code & examples */
.prose code, .inline-code {
  font-family: ui-monospace, 'Cascadia Code', Consolas, 'Courier New', monospace;
  font-size: .875em;
  direction: ltr;
  unicode-bidi: embed;
  background: color-mix(in srgb, var(--md-primary) 8%, var(--md-surface-container-high));
  color: var(--md-on-surface);
  padding: .15rem .5rem;
  border-radius: var(--r-xs);
  border: 1px solid color-mix(in srgb, var(--md-primary) 12%, transparent);
}

.prose pre {
  direction: ltr;
  text-align: left;
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  padding: 1.25rem 1.35rem;
  border-radius: var(--r-md);
  overflow-x: auto;
  font-size: .875rem;
  line-height: 1.85;
  margin: 1.5rem 0;
  border: 1px solid var(--md-outline-variant);
  border-inline-start: 4px solid var(--md-primary);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--md-on-surface) 4%, transparent);
}
.prose pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
  border: none;
}

/* Code block with copy button */
.code-wrap {
  position: relative;
  margin: 1.5rem 0;
}
.code-wrap pre {
  margin: 0;
  padding-top: 2.75rem;
}
.copy-btn {
  position: absolute;
  top: .65rem;
  inset-inline-end: .65rem;
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .35rem .7rem;
  font-family: inherit;
  font-size: .75rem;
  font-weight: 600;
  color: var(--md-on-primary);
  background: var(--md-primary);
  border: none;
  border-radius: var(--r-sm);
  cursor: pointer;
  z-index: 2;
  transition: background .15s, transform .1s;
  box-shadow: 0 1px 3px color-mix(in srgb, var(--md-on-surface) 12%, transparent);
}
.copy-btn:hover {
  filter: brightness(1.08);
}
.copy-btn:active {
  transform: scale(0.97);
}
.copy-btn svg {
  flex-shrink: 0;
}
.copy-btn.is-copied {
  background: #2e7d32;
}
html[data-theme="dark"] .copy-btn.is-copied {
  background: #66bb6a;
  color: #000;
}


/* Example prompt / dialogue blocks */
.prose .example-block {
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--r-md);
  padding: 1.15rem 1.35rem;
  margin: 1.5rem 0;
  font-size: .97rem;
  line-height: 1.85;
}
.prose .example-block strong {
  color: var(--md-primary);
  font-weight: 600;
}

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; border-radius: var(--r-md); border: 1px solid var(--md-outline-variant); }
.table-wrap table { width: 100%; border-collapse: collapse; font-size: .938rem; min-width: 480px; }
.table-wrap th {
  background: var(--md-surface-container-high);
  text-align: start;
  font-weight: 600;
}
.table-wrap th, .table-wrap td { padding: .7rem 1rem; border-bottom: 1px solid var(--md-outline-variant); }
.table-wrap tr:last-child td { border-bottom: none; }
.table-wrap td { color: var(--md-on-surface-variant); }
.table-wrap td:first-child, .table-wrap th:first-child { color: var(--md-on-surface); font-weight: 500; }

/* ---------- FAQ (MD3 accordion) ---------- */
.faq { margin-block: 2.5rem; }
.faq > h2 { font-size: 1.375rem; margin-bottom: 1rem; }
.faq details {
  background: var(--md-surface-container-low);
  border-radius: var(--r-md);
  margin-bottom: .625rem;
  border: 1px solid color-mix(in srgb, var(--md-outline-variant) 60%, transparent);
}
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 1rem;
  user-select: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { width: 20px; height: 20px; fill: var(--md-on-surface-variant); flex-shrink: 0; transition: transform var(--dur-2) var(--ease-standard); }
.faq details[open] summary svg { transform: rotate(180deg); }
.faq details > div { padding: 0 1.25rem 1.125rem; color: var(--md-on-surface-variant); font-size: .969rem; }

/* ---------- Dividers & misc ---------- */
.divider { height: 1px; border: none; background: var(--md-outline-variant); margin-block: 2rem; }

.empty-note {
  background: var(--md-surface-container);
  border-radius: var(--r-lg);
  padding: 1.25rem;
  color: var(--md-on-surface-variant);
  font-size: .938rem;
}

/* ---------- Post hero image ---------- */
.post-hero {
  margin-block: 1rem 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--md-surface-container);
  width: min(100%, 26rem);
  margin-inline: auto;
}
.post-hero img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 404 page ---------- */
.notfound-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 70dvh;
  text-align: center;
  gap: .5rem;
}
.notfound-page__btn { margin-top: .75rem; }

/* ---------- Motion preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}