@font-face {
  font-family: "DM Sans";
  src: url("assets/dm-sans.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("assets/ibm-plex-mono.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --background: #0c1016;
  --text: #e7ebf2;
  --secondary: #a0a9b8;
  --muted: #828c9c;
  --line: #252c37;
  --accent: #99baff;
  --sans: "DM Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", "Consolas", monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection { background: #2c416a; color: #fff; }
a { color: inherit; text-decoration: none; transition: color 150ms ease; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 2px; }
svg { display: block; }

.skip-link {
  position: fixed;
  z-index: 10;
  top: -100px;
  left: 16px;
  padding: 10px 16px;
  color: var(--background);
  background: var(--text);
}
.skip-link:focus { top: 12px; }

.page {
  width: min(100% - 64px, 900px);
  margin: 0 auto;
}

.site-header {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: -0.3px;
  color: var(--text);
}
.brand-mark { width: 6px; height: 6px; background: var(--accent); }
.site-header nav { display: flex; align-items: center; gap: 30px; }
.site-header nav a { padding: 10px 0; font-size: 13px; color: var(--secondary); }
.site-header nav a:hover { color: var(--text); }

.profile { padding: 76px 0 66px; }
.eyebrow {
  margin: 0 0 19px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1.7px;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: clamp(38px, 5.2vw, 56px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -2.2px;
}

.profile-description {
  margin: 20px 0 25px;
  font-size: 14px;
  color: var(--secondary);
  letter-spacing: 0.3px;
}
.profile-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
.profile-link svg { width: 17px; height: 17px; flex-shrink: 0; }
.profile-link .arrow { margin-left: 4px; color: var(--muted); }
.profile-link:hover { color: #c5d7ff; }
.profile-link:hover .arrow { color: #c5d7ff; }

.explore-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}
.explore-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: #111720;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.explore-card:hover { border-color: #526b94; color: var(--text); }
.card-kicker {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.7px;
}
.explore-card h2 { margin-top: 20px; font-size: 20px; }
.explore-card h2 span { float: right; color: var(--accent); }
.explore-card p { margin: 12px 0 24px; color: var(--secondary); font-size: 13px; }
.card-link { margin-top: auto; color: var(--accent); font-size: 11px; }
.section-description { margin: 0; color: var(--secondary); font-size: 14px; }
.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 20px 0;
  list-style: none;
}
.topic-list li {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--secondary);
  font-size: 11px;
}
.publication-status { margin: 18px 0 0; color: var(--muted); font-size: 12px; }
.column-profile { padding-bottom: 44px; }
.column-profile h1 { font-size: clamp(36px, 5.2vw, 52px); }
.column-intro { max-width: 650px; }
.archive-empty {
  padding: 30px;
  margin-bottom: 44px;
  border: 1px dashed #3a4555;
  border-radius: 8px;
}
.archive-empty h2 { margin: 8px 0 12px; }
.archive-empty p { max-width: 590px; color: var(--secondary); font-size: 14px; }
.reading-path { margin: 16px 0 0; padding-left: 20px; color: var(--secondary); font-size: 14px; }
.reading-path li { padding: 5px 0; }
.reading-path strong { color: var(--text); font-weight: 500; }

.content-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 43px 0 46px;
  min-height: 162px;
  border-top: 1px solid var(--line);
}

.section-heading { display: flex; gap: 23px; align-items: flex-start; }
.section-index {
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
}
h2 { margin: 0; font-size: 19px; font-weight: 500; line-height: 1.5; letter-spacing: -0.3px; }
.section-label { margin: 5px 0 0; font-size: 11px; color: var(--muted); letter-spacing: 0.5px; }
.content-section:target h2 { color: var(--accent); }
.section-body { padding-top: 4px; }
.empty-text { margin: 0; color: var(--muted); font-size: 13px; }
.text-link { display: inline-block; margin-top: 15px; color: var(--accent); font-size: 12px; }
.text-link span { margin-left: 7px; }
.text-link:hover { color: #c5d7ff; }

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 100px;
  padding: 24px 0 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}
.footer-links { display: flex; align-items: center; gap: 26px; }
.footer-links a { padding: 8px 0; }
.footer-links span { margin-left: 5px; }

@media (max-width: 640px) {
  .page { width: calc(100% - 48px); }
  .site-header { min-height: 100px; height: auto; gap: 12px; padding: 20px 0; flex-wrap: wrap; }
  .wordmark { font-size: 12px; gap: 8px; }
  .site-header nav { gap: 19px; flex-wrap: wrap; }
  .site-header nav a { font-size: 12px; }
  .profile { padding: 52px 0 47px; }
  h1 { font-size: 42px; letter-spacing: -1.6px; }
  .eyebrow { font-size: 9px; margin-bottom: 16px; }
  .profile-description { margin-top: 17px; margin-bottom: 21px; font-size: 13px; }
  .profile-link { font-size: 11px; gap: 8px; }
  .explore-grid { grid-template-columns: 1fr; gap: 12px; margin-bottom: 32px; }
  .explore-card { padding: 22px; }
  .explore-card h2 { margin-top: 12px; }
  .explore-card p { margin-bottom: 16px; }
  .archive-empty { padding: 22px; }
  .content-section { grid-template-columns: 1fr; gap: 22px; padding: 30px 0 33px; min-height: 168px; }
  .section-heading { gap: 18px; }
  .section-label { margin-top: 3px; }
  .section-body { padding: 0 0 0 30px; }
  .empty-text { font-size: 12px; }
  .text-link { font-size: 11px; margin-top: 12px; }
  .site-footer { min-height: 88px; gap: 12px; font-size: 9px; }
  .footer-links { gap: 17px; }
}

@media (max-width: 360px) {
  .page { width: calc(100% - 40px); }
  .site-header nav { gap: 13px; }
  .wordmark { font-size: 11px; gap: 7px; }
  .site-header nav a { font-size: 11px; }
  h1 { font-size: 38px; }
  .footer-links { gap: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a { transition: none; }
}