/* Daily News — serious briefing reader
   Patterns: Readwise Reader / Heptabase (sticky TOC),
   Axios Smart Brevity + Stratechery (editorial measure),
   The Browser (quiet item rhythm). */

:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #111111;
  --muted: #5c5c5c;
  --faint: #8a8a8a;
  --line: #e4e4e0;
  --line-strong: #d0d0ca;
  --accent: #1a3a5c;
  --accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);
  --note: #3d3d3d;
  --code-bg: #efefeb;
  --toc-w: 268px;
  --measure: 44rem;
  --radius: 0;
  --header-h: 0px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f0e;
    --surface: #161615;
    --text: #eceae4;
    --muted: #a09e96;
    --faint: #6f6d66;
    --line: #2a2926;
    --line-strong: #3a3934;
    --accent: #9bb8d4;
    --accent-soft: color-mix(in srgb, var(--accent) 16%, transparent);
    --note: #c4c2ba;
    --code-bg: #1e1d1a;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 18px; /* was 16px browser default; rem scale follows */
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  word-break: break-word;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* —— Shell: two-column desktop —— */
.shell {
  display: grid;
  grid-template-columns: var(--toc-w) minmax(0, 1fr);
  min-height: 100vh;
  max-width: calc(var(--toc-w) + var(--measure) + 6rem);
  margin: 0 auto;
}

/* —— Sidebar TOC —— */
.toc {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  padding: 1.75rem 1.1rem 2rem 1.35rem;
  border-right: 1px solid var(--line);
  background: var(--bg);
  scrollbar-width: thin;
}

.toc-brand {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.toc-site {
  display: block;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  text-decoration: none;
  margin-bottom: 0.55rem;
}

.toc-site:hover {
  color: var(--text);
  text-decoration: none;
}

.toc-date {
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text);
}

.toc-sub {
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.45;
}

.toc-nav {
  font-size: 0.8rem;
  line-height: 1.35;
}

.toc-section {
  margin-bottom: 1.15rem;
}

.toc-section.is-empty .toc-section-title {
  color: var(--faint);
  opacity: 0.65;
}

.toc-section-title {
  display: block;
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 0.45rem;
  padding: 0.15rem 0.35rem 0.15rem 0.55rem;
  border-left: 2px solid transparent;
}

.toc-section-title:hover {
  color: var(--text);
  text-decoration: none;
}

.toc-section-title.is-active {
  color: var(--text);
  border-left-color: var(--accent);
  background: var(--accent-soft);
}

.toc-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-items li {
  margin: 0;
}

.toc-items a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  padding: 0.28rem 0.35rem 0.28rem 0.55rem;
  border-left: 2px solid transparent;
  font-size: 0.78rem;
  line-height: 1.4;
}

.toc-items a:hover {
  color: var(--text);
  text-decoration: none;
  background: var(--accent-soft);
}

.toc-items a.is-active {
  color: var(--text);
  border-left-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 550;
}

.toc-nav-links {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.toc-nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.toc-nav-links a:hover {
  color: var(--text);
}

/* —— Main column —— */
.main-col {
  min-width: 0;
  max-width: calc(var(--measure) + 3.5rem);
  padding: 2.25rem 2rem 4rem 2.25rem;
  background: var(--bg);
}

.page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line-strong);
}

.header-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.site-name {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.site-name a {
  color: inherit;
  text-decoration: none;
}

.site-name a:hover { color: var(--text); }

.page-header h1 {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text);
}

.page-header .date {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.page-header .nav {
  margin-top: 0.9rem;
  font-size: 0.84rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
}

.page-header .nav a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-header .nav a:hover {
  color: var(--text);
  border-bottom-color: var(--line-strong);
}

/* Desktop: hide mobile chrome in header */
.toc-toggle { display: none; }
.toc-drawer { display: none; }

/* On wide screens the page header site-name is redundant with sidebar */
@media (min-width: 901px) {
  .page-header .site-name { display: none; }
  .header-top { margin-bottom: 0; }
}

/* —— Sections —— */
.content section {
  margin-bottom: 3rem;
  scroll-margin-top: 1.25rem;
}

.content section > h2 {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 0.15rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-strong);
  line-height: 1.4;
}

.content section > h2 .count {
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--faint);
  margin-left: 0.4rem;
}

.subgroup {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin: 1.65rem 0 0.2rem;
  letter-spacing: 0.02em;
}

.subgroup:first-of-type { margin-top: 1.1rem; }

/* —— Items —— */
.item {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 1.25rem;
}

.item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.item-title {
  font-size: 1.08rem;
  font-weight: 650;
  line-height: 1.4;
  letter-spacing: -0.012em;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.meta {
  font-size: 0.78rem;
  color: var(--faint);
  margin-bottom: 0.7rem;
  line-height: 1.45;
}

.body {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.78;
  margin-bottom: 0.75rem;
}

.body code,
.item-title code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.note {
  font-size: 0.88rem;
  color: var(--note);
  line-height: 1.65;
  margin-bottom: 0.85rem;
  padding-left: 0.8rem;
  border-left: 2px solid var(--line-strong);
}

.note-label {
  color: var(--faint);
  font-weight: 500;
  margin-right: 0.3rem;
}

.note strong { color: var(--text); font-weight: 600; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.15rem;
  font-size: 0.84rem;
}

.links a {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  text-decoration: none;
}

.links a:hover {
  border-bottom-color: var(--accent);
}

.empty {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 1rem 0 0;
}

footer {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

/* —— Mobile / tablet: collapsible TOC —— */
@media (max-width: 900px) {
  html { font-size: 17px; }

  .shell {
    display: block;
    max-width: none;
  }

  .toc {
    display: none;
  }

  .main-col {
    max-width: var(--measure);
    margin: 0 auto;
    padding: 1.15rem 1.2rem 3.5rem;
  }

  .toc-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    appearance: none;
    border: 1px solid var(--line-strong);
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 0.35rem 0.7rem;
    cursor: pointer;
    border-radius: 4px;
  }

  .toc-toggle:hover {
    border-color: var(--muted);
  }

  .toc-toggle[aria-expanded="true"] {
    background: var(--accent-soft);
    border-color: var(--accent);
  }

  .page-header .site-name { display: block; }

  .toc-drawer {
    display: block;
    margin: -0.5rem 0 1.5rem;
    padding: 0.85rem 0.9rem;
    border: 1px solid var(--line-strong);
    background: var(--surface);
    border-radius: 6px;
  }

  .toc-drawer[hidden] {
    display: none !important;
  }

  .toc-nav--mobile .toc-section {
    margin-bottom: 0.85rem;
  }

  .toc-nav--mobile .toc-section:last-child {
    margin-bottom: 0;
  }

  body.toc-open {
    overflow: hidden;
  }

  .page-header h1 { font-size: 1.35rem; }
  .item { padding: 1.2rem 0; }
  .item-title { font-size: 1.02rem; }
  .body { font-size: 0.93rem; }

  .content section,
  .item {
    scroll-margin-top: 0.85rem;
  }
}

@media (max-width: 480px) {
  html { font-size: 16.5px; }

  .main-col { padding: 1rem 1rem 3rem; }
  .page-header h1 { font-size: 1.25rem; }
}

/* —— Home landing (dashboard / index, not article measure) —— */
body.home {
  background: var(--bg);
}

.home-wrap {
  max-width: 60rem;
  margin: 0 auto;
  padding: 2.5rem 1.75rem 4rem;
}

@media (min-width: 900px) {
  .home-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(16rem, 1fr);
    column-gap: 2.75rem;
    row-gap: 0;
    align-items: start;
  }
  .home-header,
  .home-wrap > footer {
    grid-column: 1 / -1;
  }
  .home-latest {
    margin-bottom: 0;
  }
  .home-archive {
    margin-bottom: 0;
    padding-left: 0.25rem;
  }
}

.home-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line-strong);
}

.home-header .site-name {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 0.65rem;
}

.home-header h1 {
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.55rem;
}

.home-tagline {
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.55;
  max-width: 42rem;
}

.home-cta {
  margin-top: 1.25rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  background: var(--accent);
  color: #fff !important;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none !important;
  border-radius: 5px;
  border: 1px solid transparent;
}

@media (prefers-color-scheme: dark) {
  .btn-primary {
    color: #0f0f0e !important;
  }
}

.btn-primary:hover {
  filter: brightness(1.08);
  text-decoration: none !important;
}

.home-latest,
.home-archive {
  margin-bottom: 2.75rem;
}

.home-latest-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.35rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-strong);
}

.home-latest h2,
.home-archive h2 {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.home-latest-date {
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text);
  text-decoration: none;
}

.home-latest-date:hover {
  color: var(--accent);
  text-decoration: none;
}

.home-latest-sub {
  margin: 0.65rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.home-counts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.1rem;
  margin: 0 0 1.15rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.home-counts a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.home-counts a:hover {
  color: var(--text);
  border-bottom-color: var(--line-strong);
  text-decoration: none;
}

.home-counts .n {
  color: var(--faint);
  font-variant-numeric: tabular-nums;
  margin-left: 0.25rem;
}

.home-previews {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: preview;
}

.home-previews li {
  counter-increment: preview;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1.4rem 1fr;
  gap: 0.55rem;
  align-items: start;
}

.home-previews li::before {
  content: counter(preview);
  font-size: 0.78rem;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
  padding-top: 0.2rem;
}

.home-previews a {
  color: var(--text);
  font-weight: 550;
  font-size: 0.98rem;
  line-height: 1.4;
  text-decoration: none;
}

.home-previews a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.home-previews .sec {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--faint);
  margin-top: 0.2rem;
}

.home-more {
  margin-top: 1rem;
  font-size: 0.88rem;
}

.home-day-list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.home-day-list li {
  border-bottom: 1px solid var(--line);
}

.home-day-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  color: var(--text);
  text-decoration: none;
}

.home-day-list a:hover {
  color: var(--accent);
  text-decoration: none;
}

.home-day-list .d {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.home-day-list .meta {
  font-size: 0.8rem;
  color: var(--faint);
  font-weight: 400;
  text-align: right;
}

.home-day-list .is-latest .d::after {
  content: " · 最新";
  color: var(--faint);
  font-weight: 500;
  font-size: 0.78rem;
}

@media (max-width: 480px) {
  .home-wrap { padding: 1.5rem 1.1rem 3rem; }
  .home-header h1 { font-size: 1.5rem; }
  .home-day-list a { flex-direction: column; gap: 0.25rem; }
  .home-day-list .meta { text-align: left; }
}