/* ============================================================
   Bigdata Briefs — Editorial design system
   FT-inspired morning-note aesthetic. Serif headlines, paper
   surface, restrained color, generous whitespace.
   ============================================================ */

:root {
  /* Paper & ink */
  --paper:        #FBF7F0;          /* warm off-white, like newsprint */
  --paper-deep:   #F4EEE2;          /* card surface */
  --paper-soft:   #F8F2E7;          /* secondary surface */
  --rule:         #E5DDCB;          /* hairline rule */
  --rule-soft:    #EFE8D8;
  --ink:          #1A1714;          /* primary text */
  --ink-soft:     #4A453E;
  --ink-mute:     #7C766C;
  --ink-faint:    #A39C8E;

  /* Accents — restrained, editorial */
  --accent:       #B23B1F;          /* masthead red, used sparingly */
  --accent-soft:  #D9613F;
  --link:         #2C5C8F;          /* serif-blue */
  --link-hover:   #1F4470;

  /* Semantic — muted, never neon */
  --novel:        #4F6B3A;          /* moss */
  --novel-bg:     #EEF1E4;
  --rewrite:      #8A6A2C;          /* mustard */
  --rewrite-bg:   #F4EBD4;
  --discard:      #8A4A3A;
  --discard-bg:   #F1E2DB;
  --running:      #355A7A;
  --running-bg:   #E1ECF4;

  /* Type */
  --serif:        "Source Serif 4", "Source Serif Pro", "Charter", Georgia, "Times New Roman", serif;
  --serif-display: "Source Serif 4", "Charter", Georgia, "Times New Roman", serif;
  --sans:         "Söhne", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono:         "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Layout */
  --col-narrow:   720px;
  --col-wide:     1280px;
  --col-x-wide:   1440px;

  --shadow-card:  0 1px 0 rgba(26,23,20,.04), 0 8px 24px -12px rgba(26,23,20,.08);
}

[data-theme="dark"] {
  --paper:        #15140F;
  --paper-deep:   #1D1B16;
  --paper-soft:   #25221C;
  --rule:         #312D24;
  --rule-soft:    #2A2720;
  --ink:          #EFE8D6;
  --ink-soft:     #C9C2B0;
  --ink-mute:     #918976;
  --ink-faint:    #635D4F;
  --accent:       #E26C4A;
  --accent-soft:  #C8553A;
  --link:         #8FB6DD;
  --link-hover:   #B5D0EE;
  --novel:        #A8C083;
  --novel-bg:     #2A3320;
  --rewrite:      #DAB870;
  --rewrite-bg:   #38311E;
  --discard:      #D29483;
  --discard-bg:   #3A2A22;
  --running:      #92B4D2;
  --running-bg:   #1E2A36;
  --shadow-card:  0 1px 0 rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.5);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "onum";
  min-height: 100vh;
}

button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; padding: 0; }
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }

/* ── Type primitives ── */
.t-display    { font-family: var(--serif-display); font-weight: 700; font-size: 56px; line-height: 1.05; letter-spacing: -0.02em; }
.t-h1         { font-family: var(--serif-display); font-weight: 700; font-size: 38px; line-height: 1.12; letter-spacing: -0.015em; }
.t-h2         { font-family: var(--serif-display); font-weight: 600; font-size: 26px; line-height: 1.2; letter-spacing: -0.01em; }
.t-h3         { font-family: var(--serif-display); font-weight: 600; font-size: 19px; line-height: 1.3; }
.t-body       { font-family: var(--serif); font-size: 17px; line-height: 1.6; }
.t-body-large { font-family: var(--serif); font-size: 19px; line-height: 1.55; }
.t-meta       { font-family: var(--sans); font-size: 12px; line-height: 1.4; letter-spacing: 0.04em; text-transform: uppercase; font-weight: 600; color: var(--ink-mute); }
.t-mono       { font-family: var(--mono); font-size: 12px; letter-spacing: -0.01em; }
.t-cap        { font-family: var(--sans); font-size: 11px; line-height: 1.4; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600; color: var(--ink-mute); }

/* ── Masthead ── */
.masthead {
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 90;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
}
.masthead-inner {
  max-width: var(--col-x-wide);
  margin: 0 auto;
  padding: 14px 32px 12px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}
.masthead-edition {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.masthead-edition .edition-label { font-family: var(--sans); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 700; color: var(--ink-mute); }
.masthead-edition .edition-date { font-family: var(--serif); font-size: 13px; color: var(--ink-soft); }
.masthead-title {
  font-family: var(--serif-display);
  font-weight: 800;
  font-size: 28px;
  letter-spacing: -0.02em;
  text-align: center;
  line-height: 1;
}
.masthead-title-with-logo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  /* column-gap was 16px — ≥3× horizontal space between logo and title */
  gap: 12px 48px;
}
.masthead-logo {
  height: 46px;
  width: auto;
  max-width: min(300px, 42vw);
  display: block;
  object-fit: contain;
}
[data-theme="dark"] .masthead-logo {
  filter: invert(1) brightness(1.05);
}
.masthead-title-text {
  white-space: nowrap;
}
.masthead-title em {
  font-style: italic;
  color: var(--accent);
  font-weight: 700;
}
.masthead-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
}

/* ── Section nav ── */
.section-nav {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.section-nav-inner {
  max-width: var(--col-x-wide);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: stretch;
  gap: 0;
  font-family: var(--sans);
}
.section-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px 10px 0;
  margin-right: 24px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ink-mute);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.section-nav a:hover { color: var(--ink); text-decoration: none; }
.section-nav a.active { color: var(--ink); border-bottom-color: var(--ink); }
.section-nav .nav-spacer { flex: 1; }
.section-nav .live-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 0 0 16px;
  border-left: 1px solid var(--rule);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 600;
}
.live-dot { display: none; }

/* ── Page wrap ── */
.page {
  max-width: var(--col-x-wide);
  margin: 0 auto;
  padding: 36px 32px 80px;
}

/* ── Editorial dateline ── */
.dateline {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--ink-mute);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.dateline::after { content: none; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  border-radius: 0;
  transition: background 120ms, color 120ms;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.btn-ghost { border-color: transparent; padding: 6px 10px; }
.btn-ghost:hover { background: var(--paper-deep); color: var(--ink); }
.btn-sm { padding: 5px 10px; font-size: 10.5px; }

/* ── Tag / pill ── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  color: var(--ink-mute);
  white-space: nowrap;
}
.tag-novel    { color: var(--novel);   background: var(--novel-bg);   border-color: color-mix(in srgb, var(--novel) 40%, transparent); }
.tag-rewrite  { color: var(--rewrite); background: var(--rewrite-bg); border-color: color-mix(in srgb, var(--rewrite) 40%, transparent); }
.tag-discard  { color: var(--discard); background: var(--discard-bg); border-color: color-mix(in srgb, var(--discard) 40%, transparent); }
.tag-running  { color: var(--running); background: var(--running-bg); border-color: color-mix(in srgb, var(--running) 40%, transparent); }

/* Theme dot */
.theme-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 0;
  margin-right: 6px;
  vertical-align: 1px;
}

/* ── Card surfaces ── */
.surface {
  background: var(--paper-deep);
  border: 1px solid var(--rule);
}
.surface-flat { background: transparent; border: 1px solid var(--rule); }

/* ── Hairline rules ── */
.rule { border: 0; border-top: 1px solid var(--rule); margin: 24px 0; }
.rule-double { border: 0; border-top: 3px double var(--rule); margin: 32px 0; }
.rule-thick { border: 0; border-top: 2px solid var(--ink); margin: 24px 0; }

/* ── Table ── */
table.editorial {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 13px;
}
table.editorial thead th {
  text-align: left;
  padding: 10px 12px;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--ink-mute);
  border-bottom: 1px solid var(--ink);
}
table.editorial tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  vertical-align: middle;
}
table.editorial tbody tr { transition: background 80ms; }
table.editorial tbody tr.row-link { cursor: pointer; }
table.editorial tbody tr.row-link:hover { background: var(--paper-soft); }
table.editorial .num { font-variant-numeric: tabular-nums; font-family: var(--mono); }
table.editorial .right { text-align: right; }

/* ── Drop cap ── */
.dropcap::first-letter {
  font-family: var(--serif-display);
  font-weight: 700;
  font-size: 4.6em;
  line-height: 0.85;
  float: left;
  margin: 4px 8px -4px 0;
  color: var(--ink);
}

/* ── Sparkline ── */
.spark {
  display: inline-flex;
  vertical-align: middle;
  height: 22px;
  width: 80px;
}

/* ── Number rule (for issue/edition number) ── */
.edition-no {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
}

/* ── Selection ── */
::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); color: var(--ink); }

/* ── Scrollbar (subtle) ── */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--rule); border: 2px solid var(--paper); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-faint); }

/* ── Utility ── */
.flex { display: flex; }
.col { display: flex; flex-direction: column; }
.gap-4 { gap: 4px; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.items-center { align-items: center; }
.items-baseline { align-items: baseline; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; min-width: 0; }
.muted { color: var(--ink-mute); }
.soft  { color: var(--ink-soft); }
.faint { color: var(--ink-faint); }
.right { text-align: right; }
.tnum  { font-variant-numeric: tabular-nums; }

/* ── Page inner / responsive ── */
.page-inner { width: 100%; }
.brief-rail-right { /* mirrors brief-rail */ }

/* ── Density variants (brief-layout data-density) ── */
.brief-layout[data-density="compact"] .bullet { padding: 18px 0; }
.brief-layout[data-density="compact"] .bullet-text { font-size: 16px; line-height: 1.5; }
.brief-layout[data-density="compact"] .bullet-first .bullet-text { font-size: 19px; }
.brief-layout[data-density="comfy"] .bullet { padding: 36px 0; }
.brief-layout[data-density="comfy"] .bullet-text { font-size: 18px; line-height: 1.65; }
.brief-layout[data-density="comfy"] .bullet-first .bullet-text { font-size: 25px; }

/* ── Generic body link ── */
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 2px; }

/* ── Body base styles for body element ── */
body {
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "kern";
}
button { font: inherit; cursor: pointer; background: transparent; border: 0; color: inherit; padding: 0; }

/* ── Live-pulse keyframe ── */
@keyframes live-pulse {
  0%       { box-shadow: 0 0 0 0 color-mix(in srgb, var(--running) 50%, transparent); }
  70%      { box-shadow: 0 0 0 6px color-mix(in srgb, var(--running) 0%, transparent); }
  100%     { box-shadow: 0 0 0 0 color-mix(in srgb, var(--running) 0%, transparent); }
}
.live-dot { animation: live-pulse 2s infinite; }

/* ── Active bullet treatment ── */
.bullet-active { background: var(--paper-soft); margin: 0 -16px; padding-left: 16px; padding-right: 16px; }

/* ── Cite source label inside chip ── */
.cite-source { font-weight: 500; color: var(--ink-soft); }

/* ── First-paragraph drop cap polish ── */
.bullet-first .dropcap::first-letter {
  font-size: 3.2em;
  line-height: 0.9;
  margin-right: 8px;
  margin-top: 4px;
  color: var(--accent);
}