/* Editorial calm dark — Linear-like + newsletter reading */

:root {
  --bg: #0a0a0b;
  --bg-2: #111113;
  --bg-3: #18181b;
  --border: #27272a;
  --border-2: #3f3f46;
  --text: #fafafa;
  --text-2: #a1a1aa;
  --text-3: #71717a;
  --accent: #38bdf8;
  --accent-dim: rgba(56, 189, 248, 0.12);
  --green: #4ade80;
  --amber: #fbbf24;
  --violet: #a78bfa;
  --rose: #fb7185;
  --blue: #60a5fa;
  --radius: 12px;
  --font: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --serif: "IBM Plex Serif", Georgia, serif;
  --max: 1080px;
  --read: 42rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: #7dd3fc; }
strong { font-weight: 600; color: var(--text); }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .875em;
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: .1em .35em;
  border-radius: 6px;
}

.shell {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding-bottom: 3rem;
}

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
  margin: 0 0 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 10, 11, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.logo {
  display: flex;
  align-items: center;
  gap: .55rem;
  color: var(--text) !important;
  font-weight: 600;
  font-size: .95rem;
}
.logo:hover { color: var(--text) !important; opacity: .9; }
.logo-mark {
  width: 1.5rem; height: 1.5rem;
  border-radius: 6px;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  color: #0a0a0b;
  font-size: .75rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.topnav { display: flex; gap: .25rem; }
.topnav a {
  color: var(--text-2);
  font-size: .875rem;
  font-weight: 500;
  padding: .4rem .7rem;
  border-radius: 8px;
}
.topnav a:hover,
.topnav a.active {
  color: var(--text);
  background: var(--bg-3);
}

/* Hero (index) */
.hero {
  padding: .5rem 0 2.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  max-width: var(--read);
}
.eyebrow {
  margin: 0 0 .75rem;
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: .02em;
}
.hero-title, .page-title {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}
.lede {
  margin: 0 0 1.5rem;
  color: var(--text-2);
  font-size: 1.05rem;
  line-height: 1.65;
  max-width: 38rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-bottom: 1.75rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .55rem 1.05rem;
  border-radius: 9px;
  font-size: .9rem;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--text);
  color: var(--bg) !important;
}
.btn-primary:hover { background: #e4e4e7; color: var(--bg) !important; }
.btn-quiet {
  background: transparent;
  border-color: var(--border-2);
  color: var(--text-2) !important;
}
.btn-quiet:hover {
  border-color: var(--text-3);
  color: var(--text) !important;
  background: var(--bg-2);
}
.facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  color: var(--text-3);
  font-size: .875rem;
}
.facts strong {
  display: block;
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: .1rem;
}
.facts li { min-width: 4.5rem; }

/* Archive list */
.section-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.section-title {
  margin: 0;
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
}
.section-hint {
  margin: 0;
  font-size: .8rem;
  color: var(--text-3);
}
.list {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-2);
}
.row {
  display: grid;
  grid-template-columns: 7.5rem 1fr auto;
  gap: 1rem;
  align-items: start;
  padding: 1.05rem 1.15rem;
  border-bottom: 1px solid var(--border);
  color: inherit !important;
  transition: background .12s;
}
.row:last-child { border-bottom: none; }
.row:hover { background: var(--bg-3); color: inherit !important; }
.row.is-latest {
  background: linear-gradient(90deg, var(--accent-dim), transparent 55%);
}
.row-date {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.row-kind {
  display: inline-block;
  margin-top: .25rem;
  font-size: .7rem;
  color: var(--text-3);
}
.row-title {
  margin: 0 0 .35rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  font-family: var(--font);
}
.row-blurb {
  margin: 0;
  font-size: .875rem;
  color: var(--text-2);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.row-right {
  display: flex;
  align-items: center;
  gap: .65rem;
  white-space: nowrap;
  padding-top: .15rem;
}
.row-n {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.row-n small {
  font-size: .7rem;
  font-weight: 500;
  color: var(--text-3);
  margin-left: .15rem;
}
.row-arrow {
  color: var(--text-3);
  font-size: .95rem;
  transition: transform .12s, color .12s;
}
.row:hover .row-arrow {
  color: var(--accent);
  transform: translateX(2px);
}

/* Signal */
.sig {
  font-size: .7rem;
  font-weight: 600;
  padding: .15rem .45rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.sig-strong { color: var(--green); border-color: rgba(74, 222, 128, .35); background: rgba(74, 222, 128, .08); }
.sig-mid { color: var(--amber); border-color: rgba(251, 191, 36, .35); background: rgba(251, 191, 36, .08); }
.sig-weak { color: var(--text-3); }

/* How / steps */
.how { margin-top: 2.5rem; }
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .75rem;
}
.steps li {
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-2);
}
.step-n {
  width: 1.5rem; height: 1.5rem;
  border-radius: 999px;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  display: grid;
  place-items: center;
  font-size: .75rem;
  font-weight: 700;
  color: var(--text-2);
  flex-shrink: 0;
}
.steps strong { display: block; font-size: .9rem; margin-bottom: .15rem; }
.steps span { font-size: .8rem; color: var(--text-3); }

/* Digest page layout */
.digest-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 15rem;
  gap: 2.5rem;
  align-items: start;
}
.page-head {
  max-width: var(--read);
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.back {
  display: inline-block;
  margin-bottom: .85rem;
  font-size: .875rem;
  color: var(--text-3);
  font-weight: 500;
}
.back:hover { color: var(--text); }
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem 1rem;
  font-size: .85rem;
  color: var(--text-3);
}
.meta-row span {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
}

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1.25rem;
}
.fbtn {
  font-family: var(--font);
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-2);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .35rem .8rem;
  cursor: pointer;
}
.fbtn:hover { border-color: var(--border-2); color: var(--text); }
.fbtn.on {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

/* Items */
.items {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--read);
}
.item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}
.item:first-child { padding-top: .25rem; }
.item.is-hidden { display: none; }
.item-meta {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: .55rem;
}
.item-idx {
  font-size: .8rem;
  font-weight: 700;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}
.tag {
  font-size: .7rem;
  font-weight: 600;
  padding: .18rem .5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.tag-blue { color: var(--blue); border-color: rgba(96,165,250,.35); background: rgba(96,165,250,.1); }
.tag-violet { color: var(--violet); border-color: rgba(167,139,250,.35); background: rgba(167,139,250,.1); }
.tag-green { color: var(--green); border-color: rgba(74,222,128,.35); background: rgba(74,222,128,.1); }
.tag-amber { color: var(--amber); border-color: rgba(251,191,36,.35); background: rgba(251,191,36,.1); }
.tag-rose { color: var(--rose); border-color: rgba(251,113,133,.35); background: rgba(251,113,133,.1); }
.tag-zinc { color: var(--text-2); }

.item-title {
  margin: 0 0 .9rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.25rem;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--text);
}
.quote {
  margin: 0 0 1rem;
  padding: .85rem 1rem;
  border-left: 3px solid var(--border-2);
  background: var(--bg-2);
  border-radius: 0 8px 8px 0;
}
.quote p {
  margin: 0;
  font-size: .925rem;
  color: var(--text-2);
  font-style: italic;
  line-height: 1.6;
}
.take { margin-bottom: 1rem; }
.take-k {
  display: block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: .35rem;
}
.take p {
  margin: 0;
  font-size: .95rem;
  color: var(--text);
  line-height: 1.65;
}
.item-src {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  justify-content: space-between;
}
.handle {
  font-size: .8rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: .2rem .5rem;
  border-radius: 999px;
}
.src-links { display: flex; flex-wrap: wrap; gap: .35rem; }
.src {
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-2) !important;
  border: 1px solid var(--border);
  padding: .2rem .55rem;
  border-radius: 999px;
}
.src:hover {
  color: var(--text) !important;
  border-color: var(--border-2);
}

/* Close */
.close-box {
  margin-top: 1.75rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-2);
  max-width: var(--read);
}
.close-k {
  margin: 0 0 .5rem;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-3);
}
.close-v {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.45;
  color: var(--text);
}

/* TOC side */
.toc-side {
  position: sticky;
  top: 4.25rem;
  padding-top: .25rem;
}
.toc-label {
  margin: 0 0 .65rem;
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.toc {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  max-height: calc(100vh - 6rem);
  overflow: auto;
  padding-right: .25rem;
}
.toc-a {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  gap: .4rem;
  padding: .4rem .45rem;
  border-radius: 8px;
  color: var(--text-2) !important;
  font-size: .8rem;
  line-height: 1.35;
}
.toc-a:hover {
  background: var(--bg-3);
  color: var(--text) !important;
}
.toc-i {
  color: var(--text-3);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.toc-t {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Legacy prose */
.prose {
  max-width: var(--read);
  color: var(--text-2);
}
.prose h1, .prose h2, .prose h3 { color: var(--text); }
.prose h1 { font-family: var(--serif); font-size: 1.75rem; }
.prose h2 {
  font-size: 1.1rem;
  margin-top: 1.75rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid var(--border);
}
.prose ul { padding-left: 1.2rem; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }

/* Footer */
.foot {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem;
  font-size: .8rem;
  color: var(--text-3);
}
.foot p { margin: 0; }
.foot-links { display: flex; gap: .4rem; align-items: center; }
.foot a { color: var(--text-2); }
.foot a:hover { color: var(--text); }

.empty {
  padding: 2rem;
  text-align: center;
  color: var(--text-3);
}

@media (max-width: 900px) {
  .digest-layout { grid-template-columns: 1fr; }
  .toc-side { display: none; }
  .steps { grid-template-columns: 1fr; }
  .row {
    grid-template-columns: 1fr;
    gap: .45rem;
  }
  .row-right { justify-content: flex-start; }
}