:root {
  --paper: #f2eee3;
  --paper-deep: #e9e2d2;
  --ink: #191918;
  --muted: #6d6a61;
  --line: #c9c2b2;
  --red: #d24732;
  --teal: #176b65;
  --white: #fffdf7;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --sans: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }

.shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.narrow-shell { width: min(800px, calc(100% - 48px)); }
.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: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header { border-bottom: 1px solid var(--line); }
.header-inner {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}
.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--red);
  color: var(--white);
  font-size: 22px;
  font-weight: 800;
  transform: rotate(-5deg);
}
.brand strong { display: block; font-size: 20px; letter-spacing: .08em; line-height: 1.1; }
.brand small { display: block; margin-top: 5px; color: var(--muted); font: 500 9px/1 var(--mono); letter-spacing: .18em; }
.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a {
  position: relative;
  color: var(--muted);
  font: 500 13px/1 var(--mono);
  text-decoration: none;
  letter-spacing: .06em;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--ink); }
.main-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -10px;
  left: 0;
  height: 2px;
  background: var(--red);
}

.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 80px;
  align-items: center;
  padding-block: 80px;
}
.eyebrow {
  margin: 0 0 20px;
  color: var(--red);
  font: 600 11px/1.4 var(--mono);
  letter-spacing: .18em;
}
.hero h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(42px, 6.2vw, 78px);
  line-height: 1.12;
  letter-spacing: -.055em;
}
.hero h1 em { color: var(--teal); font-style: normal; }
.hero-intro {
  max-width: 630px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
}
.hero-aside {
  justify-self: end;
  width: 220px;
  padding: 22px;
  border-top: 5px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.issue-number { font: 600 11px/1 var(--mono); letter-spacing: .1em; }
.signal { height: 92px; display: flex; align-items: end; gap: 8px; margin: 30px 0; }
.signal i { display: block; width: 12px; background: var(--red); }
.signal i:nth-child(1) { height: 33%; }
.signal i:nth-child(2) { height: 70%; }
.signal i:nth-child(3) { height: 48%; }
.signal i:nth-child(4) { height: 100%; }
.hero-aside p { margin: 0; font: 600 18px/1.65 var(--mono); letter-spacing: .12em; }

.filter-band { background: var(--ink); color: var(--white); }
.filter-inner {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}
.search-form { display: flex; align-items: center; gap: 10px; min-width: 360px; }
.search-form > span { color: #bcb8ae; font-size: 23px; }
.search-form input {
  min-width: 0;
  flex: 1;
  padding: 10px 0;
  border: 0;
  border-bottom: 1px solid #565550;
  outline: 0;
  background: transparent;
  color: var(--white);
}
.search-form input:focus { border-color: var(--red); }
.search-form input::placeholder { color: #8c8a84; }
.search-form button {
  padding: 10px 0;
  border: 0;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font: 500 12px var(--mono);
}
.category-list { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 22px; }
.category-list a { color: #a9a79f; font: 500 12px var(--mono); text-decoration: none; }
.category-list a:hover, .category-list a[aria-current="page"] { color: var(--white); }
.category-list a[aria-current="page"]::before { content: "• "; color: var(--red); }

.article-section { padding-block: 84px 110px; }
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--ink);
}
.section-heading .eyebrow { margin-bottom: 8px; }
.section-heading h2 { margin: 0; font-size: clamp(30px, 4vw, 46px); line-height: 1; letter-spacing: -.04em; }
.section-heading > span { color: var(--muted); font: 500 11px var(--mono); letter-spacing: .12em; }
.article-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.article-card {
  min-width: 0;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 22px;
  padding: 38px 34px 38px 0;
  border-bottom: 1px solid var(--line);
}
.article-card:nth-child(even) { padding-right: 0; padding-left: 34px; border-left: 1px solid var(--line); }
.article-card-featured { grid-column: 1 / -1; grid-template-columns: 70px minmax(0, 1fr); padding-block: 52px; padding-right: 0; }
.card-index { color: var(--red); font: 600 12px var(--mono); }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--muted); font: 500 10px/1.5 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.article-meta span:first-child { color: var(--teal); }
.article-card h3 { margin: 22px 0 14px; font-size: clamp(23px, 3vw, 34px); line-height: 1.3; letter-spacing: -.035em; }
.article-card-featured h3 { max-width: 840px; font-size: clamp(34px, 5vw, 58px); }
.article-card h3 a { text-decoration: none; }
.article-card h3 a:hover { color: var(--red); }
.article-card p { max-width: 780px; margin: 0; color: var(--muted); line-height: 1.85; }
.card-footer { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-top: 30px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.tags span { color: var(--muted); font: 500 11px var(--mono); }
.round-link {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  text-decoration: none;
  transition: .2s ease;
}
.round-link:hover { background: var(--red); border-color: var(--red); color: var(--white); transform: rotate(8deg); }
.empty-state { padding: 90px 0; text-align: center; }
.empty-state > span { color: var(--red); font: 600 12px var(--mono); }
.empty-state h3 { margin: 15px 0 6px; font-size: 28px; }
.empty-state p { color: var(--muted); }
.text-link { color: var(--ink); font: 600 12px var(--mono); text-decoration: none; border-bottom: 1px solid var(--red); }

.article-hero { padding-block: 82px 72px; }
.back-link { display: inline-block; margin-bottom: 55px; color: var(--muted); font: 500 12px var(--mono); text-decoration: none; }
.back-link:hover { color: var(--red); }
.article-hero h1 { margin: 28px 0; font-size: clamp(42px, 7vw, 76px); line-height: 1.13; letter-spacing: -.055em; }
.article-deck { margin: 0; color: var(--muted); font-size: 20px; line-height: 1.85; }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 34px; }
.article-tags span { color: var(--teal); font: 500 11px var(--mono); }
.article-rule { width: 100%; height: 9px; background: var(--ink); }
.article-rule span { display: block; width: 33%; height: 100%; background: var(--red); }
.prose { padding-block: 80px 100px; font-size: 17px; line-height: 2; }
.prose > *:first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3, .prose h4 { margin: 2em 0 .7em; line-height: 1.35; letter-spacing: -.025em; }
.prose h2 { font-size: 32px; counter-increment: section; }
.prose h2::before { content: counter(section, decimal-leading-zero) ". "; color: var(--red); font: 600 13px var(--mono); }
.prose p, .prose ul, .prose ol { margin: 1.35em 0; }
.prose a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose blockquote { margin: 2em 0; padding: 4px 0 4px 28px; border-left: 4px solid var(--red); color: var(--muted); font-size: 19px; }
.prose pre { overflow-x: auto; margin: 2em 0; padding: 28px; background: var(--ink); color: #e9e4d8; font: 14px/1.75 var(--mono); }
.prose :not(pre) > code { padding: 2px 7px; background: var(--paper-deep); color: var(--red); font: .88em var(--mono); }
.prose img { margin: 2.5em auto; border: 1px solid var(--line); }
.article-end {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 30px;
  align-items: center;
  padding: 38px 0 80px;
  border-top: 1px solid var(--ink);
}
.article-end > span { color: var(--red); font: 600 11px var(--mono); }
.article-end strong { font-size: 18px; }
.article-end p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

.site-footer { background: var(--ink); color: var(--white); }
.footer-inner { min-height: 180px; display: flex; justify-content: space-between; align-items: center; gap: 40px; }
.footer-inner strong { font-size: 20px; letter-spacing: .08em; }
.footer-inner p { margin: 6px 0 0; color: #9b9991; font-size: 13px; }
.footer-meta { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 14px 24px; color: #9b9991; font: 500 10px var(--mono); }
.footer-meta a { text-decoration: none; }
.footer-meta a:hover { color: var(--white); }

.login-page { min-height: calc(100vh - 180px); display: grid; place-items: center; padding: 60px 24px; }
.login-panel { width: min(460px, 100%); padding: 46px; border: 1px solid var(--line); background: var(--white); box-shadow: 14px 14px 0 var(--paper-deep); }
.login-heading { margin: 50px 0 32px; }
.login-heading h1 { margin: 0 0 8px; font-size: 36px; letter-spacing: -.04em; }
.login-heading p:last-child { margin: 0; color: var(--muted); }
.stack-form { display: grid; gap: 22px; }
.stack-form label, .editor-form label { display: grid; gap: 8px; font-size: 13px; font-weight: 600; }
.stack-form input, .editor-form input, .editor-form textarea, .editor-form select {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 0;
  outline: 0;
  background: var(--white);
  color: var(--ink);
}
.stack-form input:focus, .editor-form input:focus, .editor-form textarea:focus, .editor-form select:focus { border-color: var(--teal); box-shadow: 0 0 0 2px rgba(23, 107, 101, .12); }
.primary-button, .quiet-button, .danger-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
  cursor: pointer;
  font: 600 12px var(--mono);
  text-decoration: none;
}
.primary-button:hover { background: var(--red); border-color: var(--red); }
.quiet-button { background: transparent; color: var(--ink); }
.quiet-button:hover { background: var(--paper-deep); }
.danger-button { border-color: var(--red); background: transparent; color: var(--red); }
.danger-button:hover { background: var(--red); color: var(--white); }
.login-panel > .back-link { margin: 28px 0 0; }
.alert { margin: 0 0 24px; padding: 14px 16px; border-left: 4px solid; font-size: 14px; }
.alert-error { border-color: var(--red); background: #f7dfda; color: #7e261b; }
.alert-success { border-color: var(--teal); background: #dcebe7; color: #104f4a; }

.admin-main, .editor-main { min-height: calc(100vh - 272px); padding-block: 70px 100px; }
.admin-heading, .editor-heading { display: flex; justify-content: space-between; align-items: end; gap: 32px; margin-bottom: 44px; }
.admin-heading h1, .editor-heading h1 { margin: 0; font-size: clamp(38px, 5vw, 58px); letter-spacing: -.05em; }
.admin-heading p:last-child { margin: 10px 0 0; color: var(--muted); }
.admin-actions { display: flex; gap: 12px; }
.admin-table-wrap { overflow-x: auto; border-top: 4px solid var(--ink); }
.admin-table { width: 100%; border-collapse: collapse; min-width: 760px; }
.admin-table th { padding: 18px 14px; border-bottom: 1px solid var(--ink); text-align: left; color: var(--muted); font: 500 10px var(--mono); letter-spacing: .1em; }
.admin-table td { padding: 22px 14px; border-bottom: 1px solid var(--line); font-size: 14px; vertical-align: middle; }
.admin-table td:first-child { width: 42%; }
.admin-table strong, .admin-table small { display: block; }
.admin-table small { margin-top: 5px; color: var(--muted); font: 10px var(--mono); }
.status { display: inline-block; padding: 5px 9px; font: 600 10px var(--mono); }
.status-published { background: #d9ebe5; color: #12534d; }
.status-draft { background: var(--paper-deep); color: var(--muted); }
.row-actions { text-align: right; white-space: nowrap; }
.row-actions a { margin-left: 15px; color: var(--teal); font: 500 12px var(--mono); }
.empty-admin { padding: 50px; text-align: center; color: var(--muted); }
.password-panel { max-width: 720px; margin-top: 48px; border-top: 1px solid var(--line); padding-top: 22px; }
.password-panel summary { cursor: pointer; font-weight: 600; }
.password-form { display: grid; grid-template-columns: 1fr 1fr auto; gap: 14px; align-items: end; margin-top: 22px; }
.password-form label { display: grid; gap: 7px; font-size: 12px; font-weight: 600; }
.password-form input { min-height: 46px; padding: 10px 12px; border: 1px solid var(--line); background: var(--white); }

.editor-heading { align-items: center; }
.editor-heading .back-link { margin-bottom: 18px; }
.editor-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 44px; align-items: start; }
.editor-primary { display: grid; gap: 25px; }
.editor-form textarea { resize: vertical; line-height: 1.7; }
.content-editor { min-height: 560px; font: 14px/1.8 var(--mono) !important; }
.field-hint { color: var(--muted); font: 500 10px var(--mono); }
.editor-sidebar { position: sticky; top: 24px; display: grid; gap: 14px; }
.settings-card { display: grid; gap: 22px; padding: 26px; border-top: 4px solid var(--ink); background: var(--paper-deep); }
.settings-card h2 { margin: 0; font-size: 18px; }
.settings-note { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.full-button { width: 100%; }

.error-page { min-height: calc(100vh - 272px); padding-block: 120px; }
.error-code { color: var(--red); font: 600 11px var(--mono); }
.error-page h1 { margin: 12px 0; font-size: clamp(42px, 7vw, 76px); letter-spacing: -.05em; }
.error-page p { margin: 0 0 32px; color: var(--muted); font-size: 18px; }

@media (max-width: 820px) {
  .shell, .narrow-shell { width: min(100% - 32px, 100%); }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 50px; padding-block: 64px; }
  .hero-aside { justify-self: start; width: 100%; display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: end; }
  .signal { display: none; }
  .filter-inner { align-items: stretch; flex-direction: column; gap: 24px; padding-block: 24px; }
  .search-form { min-width: 0; }
  .category-list { justify-content: flex-start; }
  .article-grid { grid-template-columns: 1fr; }
  .article-card, .article-card:nth-child(even), .article-card-featured { grid-column: auto; grid-template-columns: 42px minmax(0, 1fr); padding: 34px 0; border-left: 0; }
  .article-card-featured h3 { font-size: clamp(30px, 8vw, 44px); }
  .editor-grid { grid-template-columns: 1fr; }
  .editor-sidebar { position: static; }
  .footer-inner { align-items: flex-start; flex-direction: column; padding-block: 48px; }
  .footer-meta { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .header-inner { min-height: 78px; }
  .brand-mark { width: 38px; height: 38px; font-size: 19px; }
  .brand strong { font-size: 17px; }
  .main-nav { gap: 16px; }
  .main-nav a:nth-child(2) { display: none; }
  .hero { padding-block: 50px; }
  .hero h1 { font-size: 42px; }
  .hero-intro { font-size: 16px; }
  .hero-aside { display: block; }
  .article-section { padding-block: 62px 80px; }
  .section-heading { align-items: start; flex-direction: column; gap: 16px; }
  .article-card, .article-card:nth-child(even), .article-card-featured { grid-template-columns: 1fr; gap: 10px; }
  .article-hero { padding-block: 55px; }
  .article-hero .back-link { margin-bottom: 40px; }
  .article-hero h1 { font-size: 42px; }
  .article-deck { font-size: 17px; }
  .prose { padding-block: 55px 70px; font-size: 16px; }
  .prose h2 { font-size: 27px; }
  .article-end { grid-template-columns: 1fr; }
  .login-panel { padding: 32px 24px; box-shadow: 8px 8px 0 var(--paper-deep); }
  .admin-heading, .editor-heading { align-items: flex-start; flex-direction: column; }
  .admin-actions { width: 100%; justify-content: space-between; }
  .password-form { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}