/*
 * Penlum Flat: the single, highly configurable blog theme for Penlum.
 * Served as /_penlum/penlum-flat.css; the renderer prints the owner's settings
 * as the :root variables and modifier classes listed below.
 * Every value the site owner can change in "Giao diện" is a CSS variable or a
 * modifier class, so the renderer only has to print settings, never new CSS.
 *
 * Settings -> tokens
 *   Màu chính            --pf-primary
 *   Màu nhấn             --pf-accent
 *   Bo góc               --pf-radius (0 | 6px | 14px)
 *   Độ rộng trang        --pf-width (1080px | 1200px | 1320px)
 *   Font giao diện       --pf-font-ui
 *   Font bài viết        --pf-font-prose (Lora | Be Vietnam Pro)
 *   Bố cục header        .pf-header--split | .pf-header--center
 *   Header dính          .pf-header--sticky
 *   Footer               .pf-footer--dark | .pf-footer--light
 *   Số cột lưới          .pf-grid--2 | --3 | --4 (per block)
 *
 * Readability rule: no text below 16px, including meta and labels.
 */

@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 400;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-vietnamese-400-normal.woff2) format('woff2');
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 400;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-latin-400-normal.woff2) format('woff2');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 500;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-vietnamese-500-normal.woff2) format('woff2');
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 500;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-latin-500-normal.woff2) format('woff2');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 600;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-vietnamese-600-normal.woff2) format('woff2');
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 600;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-latin-600-normal.woff2) format('woff2');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 700;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-vietnamese-700-normal.woff2) format('woff2');
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-weight: 700;
  font-display: swap;
  src: url(fonts/be-vietnam-pro-latin-700-normal.woff2) format('woff2');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: Lora;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/lora-vietnamese-400-normal.woff2) format('woff2');
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: Lora;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/lora-latin-400-normal.woff2) format('woff2');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: Lora;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/lora-vietnamese-600-normal.woff2) format('woff2');
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: Lora;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/lora-latin-600-normal.woff2) format('woff2');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: Lora;
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/lora-vietnamese-400-italic.woff2) format('woff2');
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: Lora;
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/lora-latin-400-italic.woff2) format('woff2');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --pf-primary: #2f4fe0;
  --pf-accent: #f2894b;
  --pf-radius: 14px;
  --pf-width: 1200px;
  --pf-font-ui: 'Be Vietnam Pro', system-ui, sans-serif;
  --pf-font-prose: Lora, Georgia, serif;
  --pf-ink: #171a21;
  --pf-muted: #5b6272;
  --pf-line: #e7e9ef;
  --pf-soft: #f5f6fa;
  --pf-bg: #ffffff;
  --pf-primary-soft: color-mix(in srgb, var(--pf-primary) 8%, white);
  --pf-gap: clamp(20px, 3vw, 32px);
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--pf-bg);
  color: var(--pf-ink);
  font: 400 17px/1.65 var(--pf-font-ui);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
a:hover {
  color: var(--pf-primary);
}
:focus-visible {
  outline: 3px solid var(--pf-primary);
  outline-offset: 3px;
  border-radius: 4px;
}
.pf-skip {
  position: absolute;
  left: -9999px;
}
.pf-skip:focus {
  left: 16px;
  top: 16px;
  z-index: 100;
  background: #fff;
  padding: 12px 16px;
}
.pf-container {
  max-width: var(--pf-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}
.pf-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Topbar: one line of announcement, optional */
.pf-topbar {
  background: var(--pf-primary);
  color: #fff;
  font-size: 16px;
  text-align: center;
  padding: 8px 16px;
}
.pf-topbar a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.pf-topbar a:hover {
  color: #fff;
}

/* Header */
.pf-header {
  background: rgb(255 255 255 / 0.94);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--pf-line);
  z-index: 20;
}
.pf-header--sticky {
  position: sticky;
  top: 0;
}
.pf-header__bar {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}
.pf-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--pf-ink);
}
.pf-brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: calc(var(--pf-radius) * 0.7);
  background: var(--pf-primary);
  color: #fff;
}
.pf-brand__mark .pf-icon {
  width: 20px;
}
.pf-brand small {
  display: block;
  font-size: 16px;
  font-weight: 400;
  color: var(--pf-muted);
  letter-spacing: 0;
  line-height: 1.2;
}
.pf-nav {
  margin-left: auto;
}
.pf-nav > ul {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.pf-nav li {
  position: relative;
}
.pf-nav a,
.pf-nav summary {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
}
.pf-nav a[aria-current='page'] {
  color: var(--pf-primary);
  background: var(--pf-primary-soft);
}
.pf-nav a:hover,
.pf-nav summary:hover {
  background: var(--pf-soft);
  color: var(--pf-ink);
}
.pf-nav summary {
  list-style: none;
}
.pf-nav summary::-webkit-details-marker {
  display: none;
}
.pf-nav summary .pf-icon {
  width: 16px;
  transition: transform 0.15s;
}
.pf-nav details[open] summary .pf-icon {
  transform: rotate(180deg);
}
/* Dropdown: plain <details>, works without JavaScript */
.pf-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 240px;
  list-style: none;
  margin: 0;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--pf-line);
  border-radius: var(--pf-radius);
  box-shadow: 0 18px 40px -18px rgb(20 30 60 / 0.35);
}
.pf-dropdown a {
  border-radius: calc(var(--pf-radius) * 0.6);
  justify-content: space-between;
}
.pf-external .pf-icon {
  width: 16px;
  color: var(--pf-muted);
}
.pf-header__tools {
  display: flex;
  align-items: center;
  gap: 4px;
}
.pf-icon-link {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  color: var(--pf-ink);
  cursor: pointer;
}
.pf-icon-link:hover {
  background: var(--pf-soft);
}
.pf-menu-toggle {
  display: none;
}
.pf-menu-toggle summary {
  list-style: none;
}
.pf-menu-toggle summary::-webkit-details-marker {
  display: none;
}

/* Header layout A (default): brand left, menu and tools on the same row */
.pf-header--split > .pf-container {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 72px;
}
.pf-header--split .pf-header__bar {
  display: contents;
}
.pf-header--split .pf-nav {
  order: 1;
}
.pf-header--split .pf-header__tools {
  order: 2;
}

/* Header layout B: centred brand, menu on its own row */
.pf-header--center .pf-header__bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  min-height: 84px;
}
.pf-header--center .pf-brand {
  grid-column: 2;
}
.pf-header--center .pf-header__tools {
  grid-column: 3;
  justify-self: end;
}
.pf-header--center .pf-nav {
  margin: 0;
  border-top: 1px solid var(--pf-line);
}
.pf-header--center .pf-nav > ul {
  justify-content: center;
  padding: 6px 0;
}

/* Shared bits */
.pf-label {
  display: inline-block;
  font-size: 16px;
  font-weight: 600;
  color: var(--pf-primary);
}
.pf-label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 2px;
  background: var(--pf-accent);
  vertical-align: 2px;
}
.pf-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-size: 16px;
  color: var(--pf-muted);
}
.pf-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--pf-primary);
  color: #fff;
  font-weight: 600;
  font-size: 16px;
}
.pf-button:hover {
  color: #fff;
  filter: brightness(1.08);
}
.pf-button--ghost {
  background: transparent;
  color: var(--pf-ink);
  border: 1px solid var(--pf-line);
}
.pf-button--ghost:hover {
  color: var(--pf-primary);
  border-color: var(--pf-primary);
}
.pf-thumb {
  position: relative;
  overflow: hidden;
  border-radius: var(--pf-radius);
  background: var(--pf-soft);
  aspect-ratio: 16 / 10;
}
.pf-thumb img,
.pf-thumb .ph {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
a:hover .pf-thumb img,
a:hover .pf-thumb .ph {
  transform: scale(1.04);
}

/* Blocks */
.pf-block {
  padding: clamp(36px, 6vw, 64px) 0 0;
}
.pf-block:last-child {
  padding-bottom: clamp(48px, 8vw, 88px);
}
.pf-block__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--pf-line);
}
.pf-block__head h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: -0.02em;
  position: relative;
}
.pf-block__head h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -15px;
  width: 48px;
  height: 3px;
  background: var(--pf-primary);
  border-radius: 3px;
}
.pf-block__head a {
  font-size: 16px;
  font-weight: 600;
  color: var(--pf-primary);
  white-space: nowrap;
}

/* Block: featured post */
.pf-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr);
  gap: var(--pf-gap);
}
.pf-hero--solo {
  grid-template-columns: minmax(0, 1fr);
}
.pf-hero__main {
  position: relative;
  display: block;
  border-radius: var(--pf-radius);
  overflow: hidden;
  min-height: 460px;
  color: #fff;
  isolation: isolate;
}
.pf-hero__main .ph,
.pf-hero__main img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  transition: transform 0.5s ease;
}
.pf-hero__main:hover .ph {
  transform: scale(1.03);
}
.pf-hero__main::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgb(10 14 30 / 0) 30%, rgb(10 14 30 / 0.82) 100%);
}
.pf-hero__body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: clamp(22px, 4vw, 40px);
}
.pf-hero__body .pf-label {
  color: #fff;
}
.pf-hero__body h2 {
  margin: 10px 0 12px;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  max-width: 22ch;
}
.pf-hero__body p {
  margin: 0 0 20px;
  max-width: 56ch;
  color: rgb(255 255 255 / 0.86);
}
.pf-hero__main:hover {
  color: #fff;
}
.pf-hero__side {
  display: grid;
  gap: 20px;
  align-content: start;
}
.pf-hero__side h3,
.pf-hero__side-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--pf-muted);
}
.pf-mini {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
}
.pf-mini .pf-thumb {
  aspect-ratio: 1;
}
.pf-mini h4 {
  margin: 4px 0 0;
  font-size: 17px;
  line-height: 1.4;
}

/* Block: quote / announcement band */
.pf-band {
  margin-top: clamp(36px, 6vw, 64px);
  background: var(--pf-primary-soft);
  border-block: 1px solid color-mix(in srgb, var(--pf-primary) 14%, white);
}
.pf-band__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: clamp(28px, 5vw, 44px) 0;
  text-align: center;
}
.pf-band blockquote {
  margin: 0;
  font: italic 400 clamp(20px, 2.6vw, 26px) / 1.5 var(--pf-font-prose);
  max-width: 44ch;
}
.pf-band blockquote::before,
.pf-band blockquote::after {
  color: var(--pf-primary);
  font-weight: 600;
}
.pf-band blockquote::before {
  content: '“';
}
.pf-band blockquote::after {
  content: '”';
}
.pf-band + .pf-block {
  padding-top: clamp(36px, 6vw, 64px);
}

/* Block: post grid */
.pf-grid {
  display: grid;
  gap: clamp(24px, 3vw, 36px) var(--pf-gap);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.pf-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.pf-grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.pf-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pf-card h3 {
  margin: 4px 0 0;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.pf-grid--4 .pf-card h3 {
  font-size: 18px;
}
.pf-card p {
  margin: 0;
  color: var(--pf-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pf-grid--4 .pf-card p {
  display: none;
}

/* Archive (category, search) */
.pf-archive-head {
  padding: clamp(36px, 6vw, 64px) 0 clamp(24px, 4vw, 40px);
  background:
    radial-gradient(
      circle at 90% 0%,
      color-mix(in srgb, var(--pf-accent) 16%, transparent),
      transparent 40%
    ),
    var(--pf-primary-soft);
  border-bottom: 1px solid var(--pf-line);
}
.pf-archive-head h1 {
  margin: 8px 0 10px;
  font-size: clamp(30px, 5vw, 46px);
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.pf-archive-head p {
  margin: 0;
  max-width: 62ch;
  color: var(--pf-muted);
}
.pf-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 16px;
  color: var(--pf-muted);
  list-style: none;
  margin: 0;
  padding: 0;
}
.pf-crumbs li {
  min-width: 0;
}
.pf-crumbs li + li::before {
  content: '›';
  margin-right: 8px;
  color: var(--pf-muted);
}
.pf-crumbs a {
  color: inherit;
}
.pf-crumbs a:hover {
  color: var(--pf-primary);
}
/* The current page's name can be a long post title; keep it to one line. */
.pf-crumbs [aria-current] {
  flex: 1 1 8em;
  color: var(--pf-ink);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.pf-list {
  display: grid;
  gap: 28px;
}
.pf-row {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--pf-line);
}
.pf-row h2 {
  margin: 6px 0 8px;
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}
.pf-row p {
  margin: 0 0 10px;
  color: var(--pf-muted);
}
.pf-pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 48px;
}
.pf-pagination a,
.pf-pagination span {
  display: grid;
  place-items: center;
  min-width: 44px;
  height: 44px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--pf-line);
  font-weight: 600;
  font-size: 16px;
}
.pf-pagination [aria-current] {
  background: var(--pf-primary);
  border-color: var(--pf-primary);
  color: #fff;
}

/* Single post */
.pf-post-head {
  padding: clamp(32px, 5vw, 56px) 0 0;
}
.pf-post-head .pf-crumbs {
  margin-bottom: 20px;
}
.pf-post-head h1 {
  margin: 12px 0 18px;
  font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1.18;
  letter-spacing: -0.03em;
  max-width: 24ch;
}
.pf-post-head .pf-lead {
  margin: 0 0 22px;
  font-size: clamp(18px, 2vw, 21px);
  color: var(--pf-muted);
  max-width: 60ch;
}
.pf-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.pf-avatar {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--pf-primary);
  color: #fff;
  font-weight: 700;
}
.pf-author strong {
  display: block;
  font-size: 16px;
}
.pf-post-cover {
  margin-top: 32px;
  border-radius: var(--pf-radius);
  overflow: hidden;
  aspect-ratio: 21 / 9;
}
.pf-post-cover .ph {
  width: 100%;
  height: 100%;
}
.pf-post-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(32px, 5vw, 64px);
  padding: clamp(32px, 5vw, 48px) 0 clamp(48px, 8vw, 88px);
}
.pf-post-layout--full {
  grid-template-columns: minmax(0, 760px);
  justify-content: center;
}
.pf-toc {
  margin: 0 0 32px;
  border: 1px solid var(--pf-line);
  border-radius: var(--pf-radius);
  background: var(--pf-soft);
}
.pf-toc summary {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
}
.pf-toc ol {
  margin: 0;
  padding: 0 20px 18px 44px;
}
.pf-toc li {
  margin: 6px 0;
}
.pf-toc a {
  color: var(--pf-muted);
}
.pf-toc a:hover {
  color: var(--pf-primary);
}
.pf-prose {
  font: 400 19px/1.8 var(--pf-font-prose);
  max-width: 70ch;
  overflow-wrap: anywhere;
}
.pf-prose > :first-child {
  margin-top: 0;
}
.pf-prose h2,
.pf-prose h3 {
  font-family: var(--pf-font-ui);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 2em 0 0.6em;
  scroll-margin-top: 96px;
}
.pf-prose h2 {
  font-size: 28px;
}
.pf-prose h3 {
  font-size: 22px;
}
.pf-prose p,
.pf-prose ul,
.pf-prose ol {
  margin: 1.1em 0;
}
.pf-prose a {
  color: var(--pf-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.pf-prose blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 24px;
  border-left: 4px solid var(--pf-accent);
  font-style: italic;
  color: #3a4050;
}
.pf-prose figure {
  margin: 1.8em 0;
}
.pf-prose figure .ph {
  aspect-ratio: 16 / 9;
  border-radius: var(--pf-radius);
}
.pf-prose figcaption {
  margin-top: 10px;
  font: 16px/1.5 var(--pf-font-ui);
  color: var(--pf-muted);
  text-align: center;
}
.pf-prose pre {
  overflow: auto;
  padding: 20px;
  border-radius: var(--pf-radius);
  background: #10131c;
  color: #e6e9f2;
  font-size: 16px;
}
.pf-share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--pf-line);
}
.pf-share span {
  font-weight: 600;
  margin-right: 6px;
}
.pf-share a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--pf-line);
  font-size: 16px;
}
.pf-share a:hover {
  border-color: var(--pf-primary);
}
.pf-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.pf-tags a {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--pf-soft);
  font-size: 16px;
}
.pf-tags a:hover {
  background: var(--pf-primary-soft);
}

/* Sidebar */
.pf-sidebar {
  display: grid;
  gap: 32px;
  align-content: start;
}
.pf-sidebar--sticky {
  position: sticky;
  top: 96px;
}
.pf-widget h3,
.pf-widget__title {
  margin: 0 0 14px;
  font-size: 18px;
}
.pf-widget ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.pf-cat-list li a {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--pf-line);
}
.pf-cat-list span {
  color: var(--pf-muted);
}
.pf-widget .pf-mini {
  grid-template-columns: 84px minmax(0, 1fr);
  margin-bottom: 16px;
}
.pf-widget .pf-mini h4 {
  font-size: 16px;
}

/* Related posts */
.pf-related {
  background: var(--pf-soft);
  padding: clamp(40px, 6vw, 64px) 0;
  border-top: 1px solid var(--pf-line);
}
.pf-related .pf-block__head {
  border-color: #dcdfe8;
}

/* Footer */
.pf-footer {
  padding: clamp(48px, 7vw, 72px) 0 0;
  font-size: 16px;
}
.pf-footer--dark {
  background: #10131c;
  color: #c3c8d6;
}
.pf-footer--light {
  background: var(--pf-soft);
  color: var(--pf-muted);
  border-top: 1px solid var(--pf-line);
}
.pf-footer__cols {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr));
  gap: var(--pf-gap);
}
.pf-footer .pf-brand {
  color: inherit;
}
.pf-footer--dark .pf-brand {
  color: #fff;
}
.pf-footer p {
  margin: 16px 0 0;
  max-width: 38ch;
}
.pf-footer h3,
.pf-footer__title {
  margin: 0 0 16px;
  font-size: 17px;
}
.pf-footer--dark h3,
.pf-footer--dark .pf-footer__title {
  color: #fff;
}
.pf-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.pf-footer ul a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.pf-footer--dark a:hover {
  color: #fff;
}
.pf-footer .pf-tags {
  display: flex;
}
.pf-footer .pf-tags a {
  background: rgb(255 255 255 / 0.07);
}
.pf-footer--light .pf-tags a {
  background: #fff;
  border: 1px solid var(--pf-line);
}
.pf-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(40px, 6vw, 56px);
  padding: 22px 0;
  border-top: 1px solid rgb(127 135 160 / 0.25);
}

/* Responsive */
@media (max-width: 1080px) {
  .pf-grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .pf-post-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .pf-sidebar--sticky {
    position: static;
  }
  .pf-footer__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 900px) {
  .pf-hero {
    grid-template-columns: minmax(0, 1fr);
  }
  .pf-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  /* Mobile menu: the same <ul>, revealed by a <details> toggle, no JavaScript */
  .pf-menu-toggle {
    display: block;
  }
  .pf-nav {
    display: none;
  }
  .pf-menu-toggle[open] ~ .pf-nav,
  .pf-header__bar:has(.pf-menu-toggle[open]) + .pf-nav {
    display: block;
  }
  .pf-header--split > .pf-container {
    display: block;
    min-height: 0;
  }
  .pf-header--split .pf-header__bar {
    display: flex;
  }
  .pf-header__tools {
    margin-left: auto;
  }
  .pf-header--center .pf-header__bar {
    display: flex;
  }
  .pf-nav {
    width: 100%;
    margin: 0;
    border-top: 1px solid var(--pf-line);
  }
  .pf-nav > ul {
    flex-direction: column;
    padding: 8px 0 16px;
  }
  .pf-nav a,
  .pf-nav summary {
    border-radius: calc(var(--pf-radius) * 0.6);
  }
  .pf-dropdown {
    position: static;
    box-shadow: none;
    border: 0;
    padding: 0 0 0 16px;
  }
}
@media (max-width: 640px) {
  body {
    font-size: 17px;
  }
  .pf-grid,
  .pf-grid--2,
  .pf-grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }
  .pf-grid--4 .pf-card p {
    display: -webkit-box;
  }
  .pf-hero__main {
    min-height: 420px;
  }
  .pf-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .pf-footer__cols {
    grid-template-columns: minmax(0, 1fr);
  }
  .pf-brand small {
    display: none;
  }
  .pf-post-cover {
    aspect-ratio: 16 / 10;
  }
  .pf-prose {
    font-size: 18px;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}

/* Additions for the live theme */
.pf-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.pf-thumb--empty {
  display: block;
  background:
    radial-gradient(
      circle at 78% 28%,
      color-mix(in srgb, var(--pf-accent) 55%, white) 0 14%,
      transparent 15%
    ),
    linear-gradient(135deg, var(--pf-primary), color-mix(in srgb, var(--pf-primary) 55%, #0b1020));
}
.pf-hero__main .pf-thumb--empty {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.pf-search {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  max-width: 640px;
}
.pf-search input {
  flex: 1;
  min-width: 0;
  font: inherit;
  padding: 12px 18px;
  border: 1px solid var(--pf-line);
  border-radius: 999px;
  background: #fff;
}
.pf-search button {
  border: 0;
  cursor: pointer;
  font-family: inherit;
}
.pf-empty {
  padding: 48px 0;
  color: var(--pf-muted);
  text-align: center;
}
.pf-404 {
  padding: clamp(64px, 12vw, 140px) 0;
  text-align: center;
}
.pf-404 h1 {
  font-size: clamp(32px, 6vw, 56px);
  margin: 0 0 12px;
}
.pf-404 p {
  color: var(--pf-muted);
  margin: 0 0 28px;
}
.pf-slot {
  margin: 24px 0;
}
.pf-band__inner {
  flex-wrap: wrap;
}
.pf-html {
  overflow-wrap: anywhere;
}
.pf-html img {
  border-radius: var(--pf-radius);
}