:root {
  color-scheme: light;
  --paper: #f4f0e9;
  --paper-deep: #e9e3d9;
  --ink: #1c2431;
  --ink-soft: #4c5665;
  --muted: #7b8490;
  --line: #d4cfc6;
  --line-strong: #aab0b5;
  --blue: #315dbb;
  --blue-soft: #e0e8f8;
  --coral: #bf5446;
  --mint: #168d78;
  --shadow: 0 24px 60px rgba(36, 42, 52, 0.1);
  --radius: 12px;
  --shell: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 0, transparent calc(100% - 1px), rgba(49, 93, 187, 0.06) 100%),
    var(--paper);
  font-family: var(--sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

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

button,
select,
input {
  color: inherit;
}

.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;
}

.blog-site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  width: min(100% - var(--gutter) * 2, var(--shell));
  min-height: 76px;
  margin-inline: auto;
  border-bottom: 1px solid var(--line);
}

.blog-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.blog-brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 14px;
}

.blog-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 32px);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.blog-nav a {
  padding-block: 8px;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.blog-nav a:hover,
.blog-nav a:focus-visible,
.blog-nav .is-current {
  color: var(--blue);
  border-bottom-color: var(--blue);
  outline: none;
}

.blog-shell {
  width: min(100% - var(--gutter) * 2, var(--shell));
  margin: 0 auto;
}

.blog-masthead {
  max-width: 740px;
  padding: clamp(72px, 12vh, 150px) 0 clamp(58px, 9vh, 112px);
}

.blog-kicker,
.blog-section-label {
  margin: 0 0 14px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.17em;
  line-height: 1.4;
  text-transform: uppercase;
}

.blog-masthead h1 {
  max-width: 8ch;
  margin: 0;
  font-size: clamp(3.4rem, 10vw, 7.6rem);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.blog-intro {
  max-width: 36em;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
}

.blog-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(40px, 8vw, 120px);
  align-items: start;
  padding-bottom: 100px;
}

.blog-feed-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink);
}

.blog-feed-header h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.2;
}

.blog-count {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.blog-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  gap: 12px;
  padding-block: 18px;
}

.blog-search,
.blog-select {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.24);
}

.blog-search:focus-within,
.blog-select:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(49, 93, 187, 0.12);
}

.blog-search input,
.blog-select select {
  min-width: 0;
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 14px;
}

.blog-search input::placeholder {
  color: var(--muted);
}

.blog-select {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
}

.blog-select select {
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
}

.article-list {
  display: grid;
}

.article-card {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 90px;
  gap: 22px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  transition: border-color 180ms ease, transform 180ms ease;
}

.article-card:hover {
  border-bottom-color: var(--blue);
  transform: translateX(5px);
}

.article-card time {
  padding-top: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.4;
}

.article-card h3 {
  margin: 0 0 9px;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.35;
}

.article-card h3 a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}

.article-card .article-excerpt {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 15px;
}

.article-tag {
  padding: 3px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.article-read {
  justify-self: end;
  padding-top: 4px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  transition: color 180ms ease, border-color 180ms ease;
}

.article-read:hover,
.article-read:focus-visible {
  border-bottom-color: var(--blue);
  color: var(--coral);
  outline: none;
}

.blog-state {
  padding: 48px 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.blog-state.is-error {
  color: var(--coral);
}

.blog-aside {
  display: grid;
  gap: 36px;
  padding-top: 20px;
}

.author-note,
.topic-note {
  padding-top: 20px;
  border-top: 1px solid var(--ink);
}

.author-portrait {
  width: 72px;
  height: 72px;
  margin-bottom: 22px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--paper-deep);
}

.author-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-note h2 {
  margin: 0 0 12px;
  font-size: 1.35rem;
  line-height: 1.3;
}

.author-note p:not(.blog-section-label) {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.aside-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
}

.topic-note ul {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
}

.topic-note li::before {
  content: "↳ ";
  color: var(--mint);
}

.article-dialog {
  width: min(92vw, 840px);
  max-height: 88vh;
  padding: 0;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.article-dialog::backdrop {
  background: rgba(28, 36, 49, 0.52);
}

.dialog-close {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 1;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--paper);
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

.dialog-close:hover,
.dialog-close:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
  outline: none;
}

.article-reader {
  padding: clamp(32px, 7vw, 74px);
}

.article-reader h2 {
  max-width: 16ch;
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 18px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
}

.article-reader .article-excerpt {
  max-width: 50ch;
  margin: 32px 0;
  color: var(--ink-soft);
  font-size: 1.1rem;
}

.article-body {
  padding-top: 26px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.95;
}

.article-body p {
  margin: 0 0 1.25em;
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5,
.article-body h6 {
  margin: 1.6em 0 0.65em;
  color: var(--ink);
  line-height: 1.35;
}

.article-body a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.8em auto;
  border: 1px solid var(--line);
}

.article-body figure {
  margin: 1.8em 0;
}

.article-body figure img {
  margin-bottom: 0;
}

.article-body figcaption {
  padding-top: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
}

.article-body blockquote {
  padding: 4px 0 4px 20px;
  margin: 1.5em 0;
  border-left: 3px solid var(--blue);
  color: var(--ink-soft);
}

.article-body pre {
  max-width: 100%;
  padding: 18px;
  overflow-x: auto;
  background: var(--ink);
  color: #edf2fb;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
}

.article-body :not(pre) > code {
  padding: 2px 5px;
  background: var(--paper-deep);
  font-family: var(--mono);
  font-size: 0.9em;
}

.article-body table {
  display: block;
  width: 100%;
  margin: 1.5em 0;
  overflow-x: auto;
  border-collapse: collapse;
}

.article-body th,
.article-body td {
  padding: 9px 12px;
  border: 1px solid var(--line);
  text-align: left;
}

.blog-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(100% - var(--gutter) * 2, var(--shell));
  padding: 22px 0 36px;
  margin-inline: auto;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
}

@media (max-width: 860px) {
  .blog-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-aside {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .blog-site-header {
    min-height: 64px;
  }

  .blog-nav a:not(.is-current) {
    display: none;
  }

  .blog-masthead {
    padding-top: 64px;
    padding-bottom: 54px;
  }

  .blog-masthead h1 {
    font-size: clamp(3.5rem, 19vw, 5.6rem);
  }

  .blog-toolbar {
    grid-template-columns: minmax(0, 1fr);
  }

  .article-card {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 7px 14px;
  }

  .article-card time {
    grid-column: 1;
    grid-row: 1;
  }

  .article-card > div {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .article-read {
    grid-column: 2;
    grid-row: 1;
  }

  .blog-aside {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-footer {
    flex-direction: column;
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}