/* CXO Notes — design study 3 "Plex"
   Rules this sheet enforces:
   1. Two families. Sans = what a person wrote. Mono = what the machine counted.
   2. One accent (#215e4c) and it is only ever used on facts.
   3. 6px radius, 1px hairlines, zero shadows, zero gradients.
   4. Every section is a heading, one sentence of method, then content.
*/

/* ---------- fonts (self-hosted, latin subset, no CDN) ---------- */
@font-face {
  font-family: "Plex Sans";
  src: url("fonts/IBMPlexSans-400.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/IBMPlexMono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/IBMPlexMono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/IBMPlexMono-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ---------- tokens ---------- */
:root {
  --paper: #f6f6ef;
  --surface: #ffffff;
  --ink: #1c1b17;
  --ink-2: #3b3931;
  --muted: #55534a;
  --line: #dcd9cb;
  --line-soft: #e6e3d5;
  --thumb: #e2dfd1;
  --accent: #215e4c;
  --r: 6px;
  --maxw: 1240px;
  --gut: 32px;
  --sans: "Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.62 var(--sans);
  font-feature-settings: "kern" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

img { display: block; max-width: 100%; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.012em; }

/* ---------- shell ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gut);
}

.studybar {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  font: 500 11px/1.4 var(--mono);
  color: var(--muted);
  letter-spacing: 0.02em;
}
.studybar .wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 8px;
  padding-bottom: 8px;
  flex-wrap: wrap;
}
.studybar b { color: var(--ink); font-weight: 600; }
.studybar .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); flex: none;
}
.studybar .right { margin-left: auto; color: var(--muted); }

/* ---------- header ---------- */
.site {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.site .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand .mark {
  width: 26px; height: 26px;
  display: grid; place-items: center;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font: 600 14px/1 var(--mono);
  letter-spacing: 0.02em;
}
.brand .name { font: 600 15px/1 var(--sans); letter-spacing: -0.01em; }
.brand .dom { font: 400 12px/1 var(--mono); color: var(--muted); }

.site nav { display: flex; gap: 22px; font: 400 14px/1 var(--sans); }
.site nav a { color: var(--ink-2); }
.site nav a.here { color: var(--ink); font-weight: 600; }
.site .tools { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.search {
  display: flex; align-items: center; gap: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--r);
  padding: 0 10px;
  height: 34px;
  width: 216px;
}
.search input {
  border: 0; background: transparent; outline: none;
  font: 400 14px/1 var(--sans); color: var(--ink);
  width: 100%; padding: 0;
}
.search input::placeholder { color: var(--muted); }
.search .k {
  font: 500 11px/1 var(--mono); color: var(--muted);
  border: 1px solid var(--line); border-radius: 3px;
  padding: 2px 4px;
}

/* ---------- crumbs ---------- */
.crumbs {
  font: 400 12px/1.4 var(--mono);
  color: var(--muted);
  padding: 22px 0 0;
  display: flex; gap: 7px; flex-wrap: wrap;
}
.crumbs a:hover { color: var(--ink); }
.crumbs .sep, .sep-dot { color: #a9a698; }
.crumbs .now { color: var(--ink-2); }

/* ---------- type ---------- */
.eyebrow {
  font: 600 12.5px/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent);
  margin: 0 0 14px;
}
.h1 {
  font-size: clamp(34px, 4.15vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.028em;
  font-weight: 700;
  text-wrap: balance;
}
.h1-sm { font-size: clamp(30px, 3.4vw, 42px); line-height: 1.1; letter-spacing: -0.024em; }
.h2 {
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: -0.018em;
  font-weight: 600;
}
.h3 { font-size: 21px; line-height: 1.3; font-weight: 600; letter-spacing: -0.012em; }
.lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 58ch;
  margin: 22px 0 0;
}
.prose { max-width: 66ch; }
.prose p + p { margin-top: 0.9em; }
.muted { color: var(--muted); }
.meta { font: 400 14px/1.45 var(--sans); color: var(--muted); }
.fact {
  font: 500 12.5px/1.5 var(--mono);
  color: var(--accent);
  letter-spacing: 0.005em;
}
.label {
  font: 500 11.5px/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--muted);
}
.sep-dot { padding: 0 6px; }

/* ---------- sections ---------- */
.section { padding: 64px 0 0; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 4px;
}
.section-head .more {
  font: 500 12px/1 var(--mono);
  color: var(--muted);
  white-space: nowrap;
}
.section-head .more:hover { color: var(--ink); }
.section-sub {
  font: 400 16px/1.55 var(--sans);
  color: var(--muted);
  max-width: 60ch;
  margin: 14px 0 22px;
}

/* ---------- buttons / pills ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  height: 38px; padding: 0 16px;
  border: 1px solid var(--ink);
  border-radius: var(--r);
  font: 600 14px/1 var(--sans);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}
.btn:hover { background: var(--ink); color: var(--paper); text-decoration: none; }
.btn-line { border-color: var(--line); }
.btn-line:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn-fill { background: var(--ink); color: var(--paper); }
.btn-fill:hover { background: #000; }

.pill {
  display: inline-flex; align-items: center;
  height: 24px; padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  font: 500 11.5px/1 var(--mono);
  color: var(--ink-2);
  text-transform: lowercase;
}
.pill-accent { border-color: transparent; background: var(--accent); color: #fff; }
.pills { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- cards ---------- */
.card {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  overflow: hidden;
}
.card-pad { padding: 20px 24px 24px; }
.frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--thumb);
  overflow: hidden;
}
.frame img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.72) contrast(1.02); }
.frame .badge {
  position: absolute; left: 12px; top: 12px;
  background: var(--surface);
  border-radius: 4px;
  padding: 5px 8px;
  font: 600 11px/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.frame .badge-r { left: auto; right: 12px; }

/* ---------- hero ---------- */
.hero { padding: 30px 0 0; }
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.hero-grid .copy { padding-top: 0; }
.hero-actions { display: flex; gap: 10px; margin-top: 26px; flex-wrap: wrap; }
.statline {
  display: flex; gap: 34px; flex-wrap: wrap;
  margin-top: 34px; padding-top: 18px;
  border-top: 1px solid var(--line);
}
.stat .n {
  font: 600 26px/1 var(--mono);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat .l {
  display: block; margin-top: 6px;
  font: 500 11px/1.3 var(--mono);
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- ranked rows ---------- */
.rows { border-top: 1px solid var(--line-soft); }
.plate {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--thumb);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  text-align: center;
}
.plate .who {
  font: 600 11.5px/1.35 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-2);
}
.plate .len { font: 400 11px/1 var(--mono); color: var(--muted); }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font: 500 12px/1.4 var(--mono);
  color: var(--muted);
  padding: 16px 0 6px;
  border-bottom: 1px solid var(--line);
}
.filters a { color: var(--muted); }
.filters a.on { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.filters a:hover { color: var(--ink); }
.row {
  display: grid;
  grid-template-columns: 52px 216px minmax(0, 1fr);
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
}
.row-noimg { grid-template-columns: 52px minmax(0, 1fr); }
.row .rank {
  font: 700 30px/1 var(--sans);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  padding-top: 2px;
}
.row .body { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.row .title {
  font: 600 20px/1.32 var(--sans);
  letter-spacing: -0.012em;
  text-wrap: balance;
}
.row .why { font: 400 16px/1.55 var(--sans); color: var(--ink-2); max-width: 62ch; }
.row .say { font: 400 15px/1.5 var(--sans); color: var(--muted); max-width: 62ch; }
.row .meta { font: 500 12px/1.5 var(--mono); color: var(--accent); }
.row .thumb { border-radius: var(--r); overflow: hidden; background: var(--thumb); aspect-ratio: 16 / 9; }
.row .thumb img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.72) contrast(1.02); }

/* ---------- idea grid ---------- */
.ideas {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.idea {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  min-height: 56px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  transition: border-color 120ms ease;
}
.idea:hover { border-color: var(--ink); text-decoration: none; }
.idea .t { font: 600 15px/1.28 var(--sans); }
.idea .n { font: 500 12.5px/1 var(--mono); color: var(--muted); }

/* ---------- contact sheet ---------- */
.sheet { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.sheet img { border: 1px solid var(--line); border-radius: var(--r); width: 100%; }
.sheet .title { font: 600 17px/1.3 var(--sans); margin: 14px 0 4px; }

/* ---------- two-up prose ---------- */
.two-up {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

/* ---------- note page ---------- */
.note-head { padding: 26px 0 0; }
.note-head .h1-sm { max-width: 22ch; }
.byline {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-top: 16px;
  font: 400 15px/1.4 var(--sans);
  color: var(--muted);
}
.summary {
  font-size: 19px; line-height: 1.55; color: var(--ink-2);
  max-width: 66ch; margin: 22px 0 0;
}

.note-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 56px;
  align-items: start;
  padding: 26px 0 0;
}

.verdict {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  padding: 26px 28px;
}
.verdict-top {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--line-soft);
}
.verdict .mins {
  font: 600 34px/1 var(--mono);
  letter-spacing: -0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.verdict .mins span {
  display: block; margin-top: 8px;
  font: 500 11.5px/1.3 var(--mono);
  letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted);
}
.verdict-cells {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0; padding-top: 18px;
}
.verdict-cells > div { padding: 0 22px; border-left: 1px solid var(--line-soft); }
.verdict-cells > div:first-child { padding-left: 0; border-left: 0; }
.verdict-cells > div:last-child { padding-right: 0; }
.verdict-cells p { margin: 8px 0 0; font: 400 15px/1.55 var(--sans); color: var(--ink-2); }

.facts {
  display: flex; gap: 30px; flex-wrap: wrap;
  margin: 22px 0 0; padding: 16px 0;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.facts .f .n { font: 600 19px/1 var(--mono); font-variant-numeric: tabular-nums; }
.facts .f .l {
  display: block; margin-top: 6px;
  font: 500 11px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted);
}

.pull {
  margin: 34px 0;
  padding: 26px 0 26px 24px;
  border-left: 2px solid var(--accent);
}
.pull blockquote {
  margin: 0;
  font: 600 25px/1.35 var(--sans);
  letter-spacing: -0.018em;
  color: var(--ink);
  text-wrap: balance;
}
.pull .attr {
  margin-top: 14px;
  font: 400 12.5px/1.5 var(--mono);
  color: var(--muted);
}

.sect {
  padding: 22px 0 4px;
  border-top: 1px solid var(--line-soft);
}
.sect:first-of-type { border-top: 0; }
.sect .secthead { display: flex; gap: 16px; align-items: baseline; }
.sect .stamp {
  font: 500 12px/1.4 var(--mono);
  color: var(--accent);
  flex: none;
  min-width: 58px;
  padding-top: 3px;
}
.sect .h3 { margin: 0 0 10px; }
.sect p { font: 400 17px/1.62 var(--sans); color: var(--ink-2); max-width: 60ch; }
.sect .q {
  margin: 14px 0 0; max-width: 60ch;
  font: 400 16px/1.6 var(--sans); color: var(--muted);
}
.sect .q b { color: var(--ink); font-weight: 600; }

.rail { position: sticky; top: 24px; }
.railbox {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  padding: 18px 20px;
}
.railbox + .railbox { margin-top: 12px; }
.railbox .label { display: block; margin-bottom: 12px; }
.kv { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-top: 1px solid var(--line-soft); }
.kv:first-of-type { border-top: 0; padding-top: 0; }
.kv .k { font: 400 13px/1.4 var(--sans); color: var(--muted); }
.kv a.k { display: inline-flex; align-items: center; min-height: 32px; }
.kv .v { font: 500 12.5px/1.4 var(--mono); color: var(--ink); text-align: right; }
.railbox .btn { width: 100%; margin-top: 14px; }
.railnote { font: 400 12.5px/1.5 var(--sans); color: var(--muted); margin: 0 0 4px; }

.idealine { padding: 9px 0; border-top: 1px solid var(--line-soft); display: flex; gap: 12px; align-items: baseline; }
.idealine:first-child { border-top: 0; padding-top: 0; }
.idealine .no { font: 500 11.5px/1 var(--mono); color: var(--accent); flex: none; width: 16px; }
.idealine .t { font: 400 15px/1.4 var(--sans); }

/* ---------- footer ---------- */
.site-foot {
  margin-top: 76px;
  border-top: 1px solid var(--line);
  padding: 26px 0 46px;
  font: 400 12px/1.7 var(--mono);
  color: var(--muted);
}
.site-foot .wrap { display: flex; gap: 30px; justify-content: space-between; flex-wrap: wrap; }
.site-foot p { max-width: 74ch; margin: 0; }
.site-foot .links { display: flex; gap: 20px; flex-wrap: wrap; }
.site-foot a:hover { color: var(--ink); }

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .note-grid { grid-template-columns: 1fr; gap: 36px; }
  .rail { position: static; }
  .two-up { gap: 32px; }
  .row { grid-template-columns: 44px 180px minmax(0, 1fr); gap: 20px; }
}

@media (max-width: 820px) {
  :root { --gut: 20px; }
  .site .wrap { height: auto; flex-wrap: wrap; gap: 6px 14px; padding-top: 8px; padding-bottom: 8px; }
  .site nav { order: 3; width: 100%; gap: 18px; overflow-x: auto; scrollbar-width: none; font-size: 14px; }
  .site nav a, .brand { display: inline-flex; align-items: center; min-height: 44px; }
  .site nav::-webkit-scrollbar { display: none; }
  .site .tools { margin-left: auto; flex: 1 1 140px; }
  .search { height: 40px; width: auto; flex: 1 1 auto; min-width: 0; }
  .search .k { display: none; }
  .more { display: inline-flex; align-items: center; min-height: 32px; }
  .crumbs { padding-top: 16px; }
  .crumbs a, .crumbs .now { display: inline-flex; align-items: center; min-height: 32px; }
  .filters a { display: inline-flex; align-items: center; min-height: 32px; }
  .site-foot a { display: inline-flex; align-items: center; min-height: 32px; }
  .ideas { grid-template-columns: 1fr 1fr; }
  .sheet { grid-template-columns: 1fr; }
  .row { grid-template-columns: 40px minmax(0, 1fr); }
  .row .thumb, .row .plate { display: none; }
  .verdict-cells { grid-template-columns: 1fr; }
  .verdict-cells > div { padding: 14px 0 0; border-left: 0; border-top: 1px solid var(--line-soft); }
  .verdict-cells > div:first-child { padding-top: 0; border-top: 0; }
  .two-up { grid-template-columns: 1fr; }
  .section { padding-top: 52px; }
  .pull blockquote { font-size: 21px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .ideas { grid-template-columns: 1fr; }
  .hero { padding-top: 22px; }
  .statline { gap: 24px; }
  .brand .dom { display: none; }
  .section-head { flex-wrap: wrap; gap: 8px; }
  .studybar .right { display: none; }
  .site .tools .btn { display: none; }
  .idealine { padding: 12px 0; }
  .kv { min-height: 32px; align-items: center; }
  .sect .secthead { display: block; }
  .sect .stamp { display: block; margin-bottom: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

@media print {
  .studybar, .site, .site-foot, .rail, .hero-actions { display: none; }
  body { background: #fff; font-size: 11pt; }
  .section { padding-top: 24px; }
  .card, .verdict, .railbox { border-color: #ccc; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font: 400 8pt var(--mono); color: #666; }
}