/* Zotero Atlas site. Same token names as zoteroplugins.org so the two feel related; the accent is
   the plugin icon's purple. System fonts: this site loads nothing from third parties. */
:root {
  --bg: oklch(0.975 0.004 265);
  --surface: oklch(0.997 0.002 265);
  --surface-2: oklch(0.955 0.006 265);
  --code-bg: oklch(0.968 0.006 265);
  --line: oklch(0.9 0.008 265);
  --line-strong: oklch(0.78 0.012 265);
  --rule: oklch(0.22 0.02 265);
  --ink: oklch(0.22 0.02 265);
  --ink-2: oklch(0.4 0.02 265);
  --ink-3: oklch(0.49 0.015 265);
  --accent: #5b3fc4;
  --accent-ink: #ffffff;
  --accent-soft: oklch(0.93 0.045 285);
  --accent-fg: oklch(0.44 0.19 285);
  --north: #e4504a;
  --g-b: oklch(0.8 0.14 85);
  --g-b-on: oklch(0.25 0.03 80);
  --rev-fg: oklch(0.46 0.1 62);
  --rev-bg: oklch(0.96 0.05 88);
  --rev-line: oklch(0.82 0.1 80);
  --few-fg: oklch(0.42 0.085 170);
  --few-bg: oklch(0.955 0.03 170);
  --few-line: oklch(0.82 0.06 170);
  --shadow: 0 1px 0 oklch(0.22 0.02 265 / 0.04), 0 1px 3px oklch(0.22 0.02 265 / 0.06);
  --font-sans:
    system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC",
    "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --gutter: 16px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: oklch(0.17 0.012 270);
    --surface: oklch(0.21 0.014 270);
    --surface-2: oklch(0.25 0.016 270);
    --code-bg: oklch(0.15 0.012 270);
    --line: oklch(0.3 0.015 270);
    --line-strong: oklch(0.42 0.018 270);
    --rule: oklch(0.85 0.01 270);
    --ink: oklch(0.95 0.006 270);
    --ink-2: oklch(0.78 0.01 270);
    --ink-3: oklch(0.66 0.012 270);
    --accent: #8b74e6;
    --accent-ink: oklch(0.15 0.02 285);
    --accent-soft: oklch(0.3 0.06 285);
    --accent-fg: oklch(0.8 0.12 285);
    --g-b: oklch(0.75 0.14 85);
    --g-b-on: oklch(0.22 0.03 80);
    --rev-fg: oklch(0.85 0.1 80);
    --rev-bg: oklch(0.28 0.05 80);
    --rev-line: oklch(0.45 0.08 80);
    --few-fg: oklch(0.85 0.08 170);
    --few-bg: oklch(0.26 0.04 170);
    --few-line: oklch(0.42 0.06 170);
    --shadow: none;
  }
}
@media (min-width: 800px) {
  :root {
    --gutter: 48px;
  }
}

* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
}
a {
  color: var(--accent-fg);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover {
  color: var(--ink);
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
code,
pre {
  font-family: var(--font-mono);
  font-size: 0.86em;
}
code {
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
}
pre {
  max-width: 100%;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
}
h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}
h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 800;
}
h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
}
h3 {
  font-size: 1.1rem;
  font-weight: 700;
}
p {
  margin: 0 0 1em;
}
p:last-child {
  margin-bottom: 0;
}
.wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.muted {
  color: var(--ink-2);
}
.mono-sm {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
}

/* header */
.top {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.top .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
}
.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}
.top nav {
  margin-left: auto;
  display: flex;
  gap: 4px 18px;
  flex-wrap: wrap;
}
.top nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.95rem;
}
.top nav a:hover {
  color: var(--ink);
}

/* hero */
.hero {
  padding: 56px 0 40px;
}
.hero .lede {
  font-size: 1.25rem;
  color: var(--ink-2);
  max-width: 44em;
  margin: 18px 0 26px;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--ink-2);
  margin-bottom: 14px;
}
.kicker img {
  width: 20px;
  height: 20px;
  border-radius: 5px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: var(--surface);
}
.btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}
.btn.primary:hover {
  filter: brightness(1.08);
  color: var(--accent-ink);
}
.meta {
  margin-top: 16px;
  font-size: 0.92rem;
  color: var(--ink-3);
}
.meta span + span::before {
  content: " · ";
}
.howto {
  margin-top: 22px;
  padding: 14px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  color: var(--ink-2);
  font-size: 0.95rem;
}

/* sections */
section {
  border-top: 2px solid var(--rule);
  padding: 36px 0 48px;
}
.sh {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.prose {
  max-width: 46em;
}
.prose p {
  margin-bottom: 1em;
}

.cards {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
  margin-top: 8px;
}
@media (min-width: 680px) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }
}
@media (min-width: 980px) {
  .cards.three {
    grid-template-columns: 1fr 1fr 1fr;
  }
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px 16px;
  box-shadow: var(--shadow);
}
.card h3 {
  margin-bottom: 8px;
}
.card p {
  color: var(--ink-2);
  font-size: 0.97rem;
}
.card .n {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-fg);
  margin-bottom: 8px;
}

/* grade */
.grade {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 760px) {
  .grade {
    grid-template-columns: 260px 1fr;
  }
}
.tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
}
.tile .letter {
  display: inline-grid;
  place-items: center;
  width: 84px;
  height: 84px;
  border-radius: 18px;
  background: var(--g-b);
  color: var(--g-b-on);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
}
.tile .label {
  font-weight: 700;
  margin-top: 12px;
}
.tile .sub {
  color: var(--ink-3);
  font-size: 0.9rem;
}
.ladder {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin: 14px 0 12px;
}
.ladder span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--ink-3);
}
.ladder span.on {
  background: var(--g-b);
  color: var(--g-b-on);
  border-color: var(--g-b);
}
.tile img {
  display: block;
  margin: 8px auto 0;
  height: 20px;
}
.finding {
  border: 1px solid var(--rev-line);
  background: var(--rev-bg);
  color: var(--ink);
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0 0 10px;
}
.finding b {
  color: var(--rev-fg);
}
.finding .tag {
  float: right;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--rev-fg);
}
.ok {
  border: 1px solid var(--few-line);
  background: var(--few-bg);
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0 0 10px;
}
.ok .tag {
  float: right;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--few-fg);
}

/* privacy split */
.never {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 14px 18px;
  border-radius: 0 10px 10px 0;
  font-weight: 600;
  font-size: 1.08rem;
  margin: 0 0 20px;
}
.two {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
.two > *,
.grade > *,
.cards > * {
  min-width: 0;
}
@media (min-width: 760px) {
  .two {
    grid-template-columns: 1fr 1fr;
  }
}
ul.tight {
  padding-left: 1.2em;
  margin: 0 0 1em;
}
ul.tight li {
  margin-bottom: 6px;
}

/* numbers */
.stats {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
  min-width: 200px;
}
.stat .v {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.1;
}
.stat .k {
  color: var(--ink-3);
  font-size: 0.9rem;
}

/* footer */
footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 44px;
  color: var(--ink-3);
  font-size: 0.9rem;
}
footer .links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-bottom: 10px;
}
footer .links a {
  color: var(--ink-2);
}

/* subpage */
article {
  padding: 40px 0 56px;
}
article h1 {
  margin-bottom: 10px;
}
article h2 {
  font-size: 1.4rem;
  margin: 36px 0 12px;
}
article .prose {
  max-width: 48em;
}