:root {
  --c: var(--accent);
  --bg: #F7F3EC;
  --surface: #FFFDF8;
  --surface-2: #F0EAE0;
  --text: #2A2420;
  --text-2: #5E544B;
  --muted: #8C8177;
  --border: #E3DACD;
  --accent: #B4532A;
  --accent-soft: #F6E3D8;
  --shadow: 0 1px 2px rgba(60, 40, 20, .05), 0 4px 16px rgba(60, 40, 20, .05);

  --c-consulting: #2F6F8F;
  --c-content: #B4532A;
  --c-saas: #3E7D52;
  --c-app: #7A5BA6;
  --c-productivity: #A07A1E;
  --c-perspective: #4B5E8C;
  --c-life: #B0476E;

  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1A1714;
    --surface: #23201C;
    --surface-2: #2C2824;
    --text: #EDE6DC;
    --text-2: #C2B8AC;
    --muted: #8F857A;
    --border: #3A342E;
    --accent: #E08158;
    --accent-soft: #3A2A20;
    --shadow: none;
    --c-consulting: #6FB0D0;
    --c-content: #E08158;
    --c-saas: #7DC193;
    --c-app: #B39AD8;
    --c-productivity: #D9B356;
    --c-perspective: #93A6D6;
    --c-life: #E08AAB;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 14px; padding-bottom: 10px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 34px; height: 34px; flex-shrink: 0; display: block; }
.brand-name { display: block; font-family: var(--font-serif); font-weight: 700; font-size: 19px; line-height: 1.2; }
.brand-tag { display: block; font-size: 12px; color: var(--muted); line-height: 1.3; }
.tabs { display: flex; gap: 4px; background: var(--surface-2); padding: 3px; border-radius: 999px; flex-shrink: 0; }
.tabs a { padding: 4px 12px; border-radius: 999px; font-size: 14px; color: var(--text-2); white-space: nowrap; }
.tabs a:hover { text-decoration: none; color: var(--text); }
.tabs a.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); font-weight: 600; }

.cat-bar { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 10px; scrollbar-width: none; }
.cat-bar::-webkit-scrollbar { display: none; }
.cat-chip {
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
  padding: 3px 11px; border-radius: 999px; font-size: 13px;
  border: 1px solid var(--border); color: var(--text-2); background: var(--surface);
}
.cat-chip:hover { text-decoration: none; border-color: var(--c); color: var(--text); }
.cat-chip.active { border-color: var(--c); background: color-mix(in srgb, var(--c) 12%, var(--surface)); color: var(--text); font-weight: 600; }
.cat-chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c); }
.cat-chip .count { color: var(--muted); font-size: 12px; }

/* Category color hooks */
[data-cat="consulting"] { --c: var(--c-consulting); }
[data-cat="content"] { --c: var(--c-content); }
[data-cat="saas"] { --c: var(--c-saas); }
[data-cat="app"] { --c: var(--c-app); }
[data-cat="productivity"] { --c: var(--c-productivity); }
[data-cat="perspective"] { --c: var(--c-perspective); }
[data-cat="life"] { --c: var(--c-life); }

main { padding-top: 32px; padding-bottom: 40px; min-height: 60vh; }
h1, h2, h3 { font-family: var(--font-serif); line-height: 1.35; margin: 0; }

.page-head { margin-bottom: 20px; }
.page-head h1 { font-size: 26px; }
.page-head p { margin: 6px 0 0; color: var(--text-2); }
.eyebrow { font-size: 13px; color: var(--muted); letter-spacing: .02em; }

/* Day list */
.day-list { display: grid; gap: 14px; }
.day-card {
  display: block; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: var(--shadow);
}
.day-card:hover { text-decoration: none; border-color: var(--accent); }
.day-card h2 { font-size: 19px; margin: 2px 0 10px; }
.day-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.day-card li { display: flex; gap: 8px; align-items: baseline; font-size: 14px; color: var(--text-2); }
.tag {
  flex-shrink: 0; font-size: 12px; padding: 0 7px; border-radius: 5px; line-height: 20px;
  color: var(--c); background: color-mix(in srgb, var(--c) 12%, transparent); font-weight: 600;
}
.badge-sample { font-size: 12px; color: var(--muted); border: 1px dashed var(--border); border-radius: 5px; padding: 0 6px; margin-left: 6px; }

/* Issue */
.issue-head h1 { font-size: 27px; margin: 4px 0 6px; }
.tldr {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 18px; margin: 18px 0 8px;
}
.tldr h2 { font-size: 15px; margin-bottom: 8px; font-family: var(--font); }
.tldr ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.tldr li { display: flex; gap: 8px; align-items: baseline; font-size: 15px; }
.tldr a { color: var(--text); }

.item { border-top: 1px solid var(--border); padding: 26px 0 8px; scroll-margin-top: 120px; }
.item-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13px; color: var(--muted); }
.item h3 { font-size: 21px; margin: 8px 0 12px; }
.item .body p { margin: 0 0 12px; }
.item .body strong { color: var(--text); background: linear-gradient(transparent 62%, var(--accent-soft) 62%); }

.facts {
  display: grid; grid-template-columns: 5.5em 1fr; gap: 6px 12px;
  background: var(--surface-2); border-radius: 10px; padding: 12px 14px; margin: 4px 0 14px;
  font-size: 14px;
}
.facts dt { color: var(--muted); }
.facts dd { margin: 0; color: var(--text-2); }
details.facts-wrap > summary { cursor: pointer; font-size: 13px; color: var(--muted); margin-bottom: 6px; list-style: none; }
details.facts-wrap > summary::before { content: "▸ "; }
details.facts-wrap[open] > summary::before { content: "▾ "; }

.sources { font-size: 13px; color: var(--muted); margin: 4px 0 8px; }
.sources a { margin-right: 10px; }

.action {
  margin-top: 28px; padding: 16px 18px; border-radius: var(--radius);
  background: var(--accent-soft); border-left: 4px solid var(--accent);
}
.action h2 { font-size: 16px; margin-bottom: 6px; font-family: var(--font); }
.action p { margin: 0; }

.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; font-size: 14px; }

/* Category view */
.cat-head { border-left: 4px solid var(--c); padding-left: 12px; }
.cat-items { display: grid; gap: 14px; }
.cat-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 18px; box-shadow: var(--shadow);
}
.cat-item h3 { font-size: 18px; margin: 4px 0 6px; }
.cat-item .summary { margin: 0; color: var(--text-2); font-size: 15px; }
.cat-item details { margin-top: 8px; }
.cat-item details > summary { cursor: pointer; font-size: 14px; color: var(--accent); }
.cat-item details .body { margin-top: 10px; }
.cat-item details .body p { margin: 0 0 10px; }

.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.cat-card {
  display: block; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-top: 3px solid var(--c); border-radius: var(--radius);
  padding: 14px 16px; box-shadow: var(--shadow);
}
.cat-card:hover { text-decoration: none; border-color: var(--c); }
.cat-card h2 { font-size: 18px; }
.cat-card .en { font-size: 12px; color: var(--muted); }
.cat-card p { margin: 6px 0 0; font-size: 14px; color: var(--text-2); }
.cat-card .n { font-size: 13px; color: var(--c); margin-top: 8px; font-weight: 600; }

.empty { padding: 32px 0; color: var(--muted); }

.site-footer { border-top: 1px solid var(--border); padding-top: 14px; padding-bottom: 32px; font-size: 13px; color: var(--muted); }

@media (max-width: 520px) {
  .brand-tag { display: none; }
  .issue-head h1 { font-size: 23px; }
  .item h3 { font-size: 19px; }
  .facts { grid-template-columns: 1fr; gap: 2px; }
  .facts dd { margin-bottom: 6px; }
}

/* Editor's note */
.editor-note {
  margin: 18px 0 8px; padding: 12px 16px;
  border-left: 4px solid var(--accent); background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.editor-note h2 { font-size: 15px; margin-bottom: 6px; font-family: var(--font); }
.editor-note p { margin: 0 0 8px; }
.editor-note p:last-child { margin-bottom: 0; }

/* Permalinks */
.permalinks { margin-top: 6px; font-size: 13px; }
.share-link { font-family: var(--font); font-size: 12px; font-weight: 400; margin-left: 6px; color: var(--muted); }
.permalink { color: var(--text); }
.permalink:hover { color: var(--accent); text-decoration: none; }
.item-single { border-top: none; padding-top: 12px; }
.item-single h1 { font-size: 25px; margin: 8px 0 10px; }
.item-single .summary { color: var(--text-2); margin: 0 0 14px; }

/* Subscribe */
.subscribe {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; margin: 0 0 16px; box-shadow: var(--shadow);
}
.subscribe-title { font-family: var(--font-serif); font-weight: 700; font-size: 17px; color: var(--text); margin-bottom: 10px; }
.subscribe-row { display: flex; gap: 8px; }
.subscribe-row input[type="email"] {
  flex: 1; min-width: 0; font: inherit; font-size: 15px; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px;
}
.subscribe-row button {
  font: inherit; font-size: 15px; font-weight: 600; color: #fff; background: var(--accent);
  border: 0; border-radius: 8px; padding: 8px 18px; cursor: pointer;
}
.subscribe-row button:hover { filter: brightness(1.08); }
.subscribe-freq { display: flex; gap: 18px; margin-top: 10px; font-size: 14px; color: var(--text-2); }
.subscribe-freq label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.subscribe-note { margin: 8px 0 0; font-size: 12px; color: var(--muted); }