/* =========================================================
   墨线与电路 — Ink & Wire
   一套写给中文长文的排版系统
   ========================================================= */

/* ---------- 0. 变量 ---------- */
:root {
  --ink: #16161a;
  --ink-soft: #3f3f46;
  --ink-mute: #71717a;
  --paper: #fbfaf7;
  --paper-2: #f3f1ec;
  --line: #e2ded4;
  --line-strong: #cec8ba;
  --accent: #c8402a;
  --accent-soft: #f6e6e1;
  --blue: #2b5f8f;

  --serif: "Iowan Old Style", "Palatino Linotype", "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC",
    "SimSun", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", Consolas, "Liberation Mono", Menlo, monospace;

  --measure: 42rem;
  --radius: 4px;
  --shadow: 0 1px 2px rgba(22, 22, 26, 0.04), 0 8px 24px -12px rgba(22, 22, 26, 0.14);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

[data-theme="dark"] {
  --ink: #eceae3;
  --ink-soft: #c3c0b6;
  --ink-mute: #8c887d;
  --paper: #121211;
  --paper-2: #1a1a18;
  --line: #2a2a26;
  --line-strong: #3b3b35;
  --accent: #e8694f;
  --accent-soft: #2a1c18;
  --blue: #7fb0dc;
}

/* ---------- 1. 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

/* 纸张颗粒感 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.28'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}
[data-theme="dark"] body::before {
  opacity: 0.18;
  mix-blend-mode: screen;
}

::selection {
  background: var(--accent);
  color: #fff;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 76rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  transition: top 0.2s var(--ease);
}
.skip-link:focus {
  top: 1rem;
}

/* ---------- 2. 阅读进度条 ---------- */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #e8a33d 60%, var(--blue));
  z-index: 100;
  transition: width 0.1s linear;
}

/* ---------- 3. 顶栏 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  border-bottom: 1px solid var(--line);
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  font-family: var(--serif);
  font-size: 1.06rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand__en {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav a {
  position: relative;
  padding: 0.4rem 0.7rem;
  font-size: 0.86rem;
  color: var(--ink-soft);
  border-radius: var(--radius);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.nav a:hover {
  color: var(--ink);
  background: var(--paper-2);
}
.nav a[aria-current="page"] {
  color: var(--ink);
}
.nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 0.1rem;
  height: 1.5px;
  background: var(--accent);
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.icon-btn:hover {
  color: var(--ink);
  border-color: var(--line-strong);
  background: var(--paper-2);
}
.icon-btn svg {
  width: 1.05rem;
  height: 1.05rem;
}
[data-theme="dark"] .icon-sun,
:root:not([data-theme="dark"]) .icon-moon {
  display: none;
}
[data-theme="dark"] .icon-moon,
:root:not([data-theme="dark"]) .icon-sun {
  display: block;
}

/* ---------- 4. 首页 Hero ---------- */
.hero {
  position: relative;
  padding: 6.5rem 0 4.5rem;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 4.5rem 4.5rem;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 78%);
  opacity: 0.55;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 46rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 1.5rem;
}
.eyebrow::before {
  content: "";
  width: 1.9rem;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.3rem, 6vw, 3.7rem);
  line-height: 1.16;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 1.4rem;
}
.hero h1 em {
  font-style: normal;
  position: relative;
  white-space: nowrap;
  z-index: 0;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: -0.06em;
  right: -0.06em;
  bottom: 0.08em;
  height: 0.34em;
  background: var(--accent-soft);
  z-index: -1;
  border-radius: 2px;
}

.hero p {
  font-size: 1.06rem;
  color: var(--ink-soft);
  margin: 0 0 2rem;
  max-width: 34rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.6rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}
.hero__meta b {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 5. 区块标题 ---------- */
.section {
  padding: 4.5rem 0;
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.1rem;
  margin-bottom: 2.6rem;
  border-bottom: 1px solid var(--line);
}

.section__head h2 {
  font-family: var(--serif);
  font-size: 1.32rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0;
}
.section__head h2 span {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  margin-right: 0.6rem;
  letter-spacing: 0.1em;
  vertical-align: 0.18em;
}
.section__head p {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

/* ---------- 6. 文章列表 ---------- */
.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.post-item {
  border-bottom: 1px solid var(--line);
}
.post-item:last-child {
  border-bottom: 0;
}

.post-card {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1.6rem;
  padding: 2.1rem 0.5rem 2.1rem 0;
  transition: padding-left 0.3s var(--ease);
}
.post-card:hover {
  padding-left: 0.7rem;
}

.post-card__index {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  padding-top: 0.45rem;
  transition: color 0.25s var(--ease);
}
.post-card:hover .post-card__index {
  color: var(--accent);
}

.post-card__body h3 {
  font-family: var(--serif);
  font-size: clamp(1.24rem, 2.4vw, 1.5rem);
  font-weight: 600;
  line-height: 1.42;
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}
.post-card__body h3 a {
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 0.4s var(--ease);
}
.post-card:hover .post-card__body h3 a {
  background-size: 100% 1px;
}

.post-card__desc {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.75;
  max-width: 40rem;
}

.meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.meta-row .sep {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--line-strong);
}

.tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: none;
  padding: 0.14rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--ink-soft);
  background: var(--paper-2);
}

/* ---------- 7. 文章页 ---------- */
.article-header {
  padding: 4.5rem 0 2.5rem;
  border-bottom: 1px solid var(--line);
}

.article-header__inner {
  max-width: 48rem;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.1rem;
}

.article-header h1 {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 4.6vw, 2.9rem);
  line-height: 1.28;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 1.2rem;
  text-wrap: balance;
}

.article-header .lede {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: 0 0 1.6rem;
  max-width: 40rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3rem;
  padding: 3.2rem 0 5rem;
}

@media (min-width: 68rem) {
  .article-layout {
    grid-template-columns: minmax(0, var(--measure)) 15rem;
    gap: 4.5rem;
    justify-content: center;
  }
}

/* TOC */
.toc {
  display: none;
}
@media (min-width: 68rem) {
  .toc {
    display: block;
    position: sticky;
    top: 6rem;
    align-self: start;
    font-size: 0.83rem;
    border-left: 1px solid var(--line);
    padding-left: 1.3rem;
    max-height: calc(100vh - 9rem);
    overflow-y: auto;
  }
}
.toc__title {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 0.9rem;
}
.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}
.toc li.lv-3 {
  padding-left: 0.9rem;
}
.toc a {
  display: block;
  padding: 0.22rem 0;
  color: var(--ink-mute);
  line-height: 1.5;
  transition: color 0.2s var(--ease);
  border-left: 2px solid transparent;
  margin-left: -1.32rem;
  padding-left: 1.2rem;
}
.toc a:hover,
.toc a.is-active {
  color: var(--ink);
  border-left-color: var(--accent);
}

/* ---------- 8. 正文排版（核心） ---------- */
.prose {
  font-size: 1.02rem;
  line-height: 1.92;
  color: var(--ink-soft);
  max-width: var(--measure);
}

.prose > * + * {
  margin-top: 1.35em;
}

.prose h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.45;
  font-weight: 600;
  color: var(--ink);
  margin: 3.2rem 0 0;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  letter-spacing: -0.005em;
  scroll-margin-top: 6rem;
}

.prose h3 {
  font-family: var(--serif);
  font-size: 1.16rem;
  font-weight: 600;
  color: var(--ink);
  margin: 2.3rem 0 0;
  scroll-margin-top: 6rem;
}

.prose h4 {
  font-size: 1rem;
  color: var(--ink);
  margin: 1.8rem 0 0;
}

.prose p {
  margin: 1.35em 0 0;
}

.prose strong {
  color: var(--ink);
  font-weight: 600;
}

.prose a {
  color: var(--ink);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  padding-bottom: 1px;
  transition: background-size 0.3s var(--ease), color 0.2s var(--ease);
}
.prose a:hover {
  color: var(--accent);
}

.prose ul,
.prose ol {
  margin: 1.35em 0 0;
  padding-left: 1.35rem;
}
.prose li {
  margin: 0.5em 0;
  padding-left: 0.2rem;
}
.prose li::marker {
  color: var(--ink-mute);
  font-family: var(--mono);
  font-size: 0.86em;
}

.prose blockquote {
  margin: 1.9em 0;
  padding: 0.2rem 0 0.2rem 1.4rem;
  border-left: 2px solid var(--accent);
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.04rem;
  background: linear-gradient(90deg, var(--accent-soft), transparent 70%);
}
.prose blockquote > * + * {
  margin-top: 0.9em;
}
.prose blockquote p {
  margin: 0;
}

.prose hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 3rem 0;
}

/* 行内代码 */
.prose code:not([class*="language-"]) {
  font-family: var(--mono);
  font-size: 0.845em;
  padding: 0.14em 0.42em;
  border-radius: 3px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  color: var(--ink);
  white-space: nowrap;
}

/* 代码块 */
.code-block {
  margin: 1.9em 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #1c1b19;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.code-block figcaption {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.5rem 0.8rem;
  background: #171614;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8f8b80;
}
.dot-row {
  display: inline-flex;
  gap: 0.32rem;
}
.dot-row i {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: #3a3730;
}
.dot-row i:nth-child(1) {
  background: #6b4a42;
}
.dot-row i:nth-child(2) {
  background: #6b6142;
}
.dot-row i:nth-child(3) {
  background: #415a45;
}
.code-block .lang {
  margin-left: auto;
  color: #6f6b61;
}
.copy-btn {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: #8f8b80;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  padding: 0.16rem 0.5rem;
  cursor: pointer;
  transition: all 0.18s var(--ease);
}
.copy-btn:hover {
  color: #f0eee6;
  border-color: rgba(255, 255, 255, 0.3);
}
.copy-btn.is-done {
  color: #8fce9a;
  border-color: #3f6b48;
}

.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.72;
  color: #ddd9cf;
  tab-size: 2;
}
.code-block code {
  font-family: inherit;
  background: none;
  border: 0;
  padding: 0;
  white-space: pre;
}
.tok-keyword {
  color: #e08c6a;
}
.tok-string {
  color: #a3c98f;
}
.tok-comment {
  color: #6d6a60;
  font-style: italic;
}
.tok-number {
  color: #d9b46c;
}
.tok-var {
  color: #86b8d6;
}

/* 表格 */
.table-wrap {
  margin: 1.9em 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.7;
}
.prose th {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 0.7rem 0.9rem;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.prose td {
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.prose tbody tr:last-child td {
  border-bottom: 0;
}

/* 图片 */
.prose img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* ---------- 9. 文章页脚 / 翻页 ---------- */
.article-footer {
  max-width: var(--measure);
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.pager {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
  max-width: var(--measure);
  margin-top: 2.5rem;
}
.pager a {
  display: block;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  transition: all 0.25s var(--ease);
}
.pager a:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.pager .dir {
  display: block;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.4rem;
}
.pager .ttl {
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ink);
}

/* ---------- 10. 关于 / 页脚 ---------- */
.about {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}
@media (min-width: 58rem) {
  .about {
    grid-template-columns: minmax(0, 1fr) 18rem;
    gap: 4rem;
  }
}
.about p {
  color: var(--ink-soft);
  margin: 0 0 1.1em;
}
.about h2 {
  font-family: var(--serif);
  font-size: 1.32rem;
  margin: 0 0 1.2rem;
}

.facts {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  padding: 1.4rem;
}
.facts dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem 1rem;
  font-size: 0.84rem;
  line-height: 1.6;
}
.facts dt {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding-top: 0.14rem;
}
.facts dd {
  margin: 0;
  color: var(--ink);
}

.u-link {
  color: var(--accent);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
}
.u-link:hover {
  background-size: 0% 1px;
}

.archive-year {
  margin-bottom: 3rem;
}
.archive-year > h2 {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin: 0 0 0.4rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.6rem 0 3.5rem;
  margin-top: 2rem;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
}
.site-footer a:hover {
  color: var(--accent);
}

/* ---------- 11. 入场动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 40rem) {
  body {
    font-size: 16px;
  }
  .hero {
    padding: 4rem 0 3rem;
  }
  .post-card {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1.7rem 0;
  }
  .post-card__index {
    padding-top: 0;
  }
  .article-header {
    padding: 3rem 0 2rem;
  }
  .article-layout {
    padding: 2.2rem 0 3.5rem;
  }
  .nav a:not(.nav__always) {
    display: none;
  }
  .prose {
    font-size: 1rem;
  }
}

@media print {
  .masthead,
  .toc,
  .progress,
  .site-footer,
  .copy-btn {
    display: none !important;
  }
  .prose {
    max-width: none;
  }
}