body { --bg:#faf9f5; --ink:#252822; --muted:#60665b; --line:#d9dcd2; --accent:#335e4b; }
.overview { --title-size:clamp(2.8rem,6vw,3.6rem); max-width:1000px; margin:0 auto; padding:68px 64px 64px; }
.overview-bar { align-items:flex-start; margin-bottom:22px; }
.overview h1 { font:400 var(--title-size)/1.05 var(--serif); letter-spacing:-.035em; margin:0; }
.overview-bar .theme-toggle { margin-top:calc((var(--title-size) * 1.05 - 36px) / 2); }
.overview-intro { font-size:21px; line-height:1.5; max-width:740px; }
.contents { margin-top:56px; }
.contents ol { padding:28px 0 0; margin:0; list-style:none; border-top:1px solid #d9dcd2; }
.contents a { display:grid; grid-template-columns:44px minmax(0,1fr); align-items:baseline; padding:7px 0; text-decoration:none; }
.contents a:hover strong { text-decoration:underline; text-decoration-thickness:1px; text-underline-offset:5px; text-decoration-color:var(--accent); }
.toc-number { font:11px var(--mono); color:#60665b; }
.contents strong { font:400 24px/1.3 var(--serif); letter-spacing:-.012em; }
.contents small { font-size:15px; color:#60665b; margin-left:14px; }
.study { --bg:#fff; --ink:#171817; --muted:#555; --line:#ddd; --accent:#222; background:var(--bg); color:var(--ink); font-family:var(--sans); border-top:1px solid #00000012; scroll-margin-top:0; content-visibility:auto; contain-intrinsic-size:auto 1900px; }
.study-rams { contain-intrinsic-size:auto 1634px; }
.study-ideo { contain-intrinsic-size:auto 1937px; }
.study-nielsen { contain-intrinsic-size:auto 3569px; }
.study-norman { contain-intrinsic-size:auto 1918px; }
.study-gestalt { contain-intrinsic-size:auto 2395px; }
.study-bauhaus { contain-intrinsic-size:auto 1436px; }
.study-grid { contain-intrinsic-size:auto 1102px; }
.study-tufte { contain-intrinsic-size:auto 3034px; }
.study h3 { margin:0; font-size:1.35rem; line-height:1.25; }
.study .section-title { font-weight:400; letter-spacing:-.035em; line-height:1.05; font-size:clamp(3rem,7vw,4.2rem); }
.study .copy h3 { margin-bottom:8px; }
.collection-end { background:#e9ede3; color:#252e25; border-top:1px solid #bac6b4; content-visibility:auto; contain-intrinsic-size:auto 660px; }
.recap-inner { max-width:1000px; margin:0 auto; padding:64px; }
.collection-end h2 { margin:20px 0; font:400 clamp(2rem,5vw,2.8rem)/1.15 var(--serif); letter-spacing:-.025em; }
.recap-list { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:0 36px; list-style:none; margin:36px 0 0; padding:0; }
.recap-list li { display:grid; grid-template-columns:26px minmax(0,1fr); gap:14px; padding:22px 0; border-top:1px solid #bdc8b7; }
.recap-number { padding-top:4px; font:12px/1.5 var(--mono); color:#53644f; }
.recap-list h3 { margin:0 0 8px; font-size:18px; line-height:1.35; font-weight:600; }
.recap-list h3 a { text-decoration:none; }
.recap-list h3 a:hover { text-decoration:underline; }
.recap-list h3 span { font-size:14px; color:#53644f; margin-left:4px; }
.recap-list p { font-size:16px; line-height:1.5; color:#495448; }
.site-footer { background:#252e25; color:#e9ede3; font-size:15px; }
.site-footer-inner { display:flex; align-items:center; flex-wrap:wrap; gap:12px 32px; max-width:1000px; margin:0 auto; padding:22px 64px; }
.site-footer a { text-decoration:none; padding:4px 0; }
.site-footer a:hover { text-decoration:underline; }
.site-footer a:focus-visible { outline-color:#e9ede3; }
@media(max-width:680px) {
 .overview { padding:40px 24px 36px; }
 .overview-intro { font-size:19px; }
 .contents { margin-top:36px; }
 .contents ol { padding-top:18px; }
 .contents a { grid-template-columns:32px minmax(0,1fr); padding:9px 0; }
 .contents strong { font-size:21px; }
 .contents small { display:block; margin:2px 0 0; font-size:14px; }
 .study-rams { contain-intrinsic-size:auto 1974px; }
 .study-ideo { contain-intrinsic-size:auto 2496px; }
 .study-nielsen { contain-intrinsic-size:auto 4544px; }
 .study-norman { contain-intrinsic-size:auto 2934px; }
 .study-gestalt { contain-intrinsic-size:auto 3600px; }
 .study-bauhaus { contain-intrinsic-size:auto 1635px; }
 .study-grid { contain-intrinsic-size:auto 2144px; }
 .study-tufte { contain-intrinsic-size:auto 4468px; }
 .collection-end { contain-intrinsic-size:auto 1080px; }
 .recap-inner { padding:40px 24px; }
 .recap-list { grid-template-columns:1fr; margin-top:28px; }
 .site-footer-inner { padding:20px 24px; }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body { --bg:#141513; --ink:#ecece6; --muted:#999e93; --line:#2e322a; --accent:#5ba384; }
  :root:not([data-theme="light"]) .contents ol { border-top-color:var(--line); }
  :root:not([data-theme="light"]) .toc-number,
  :root:not([data-theme="light"]) .contents small { color:var(--muted); }
  :root:not([data-theme="light"]) .study { border-top-color:#ffffff12; }

  :root:not([data-theme="light"]) .study-rams { --bg:#232321; --ink:#dddbd5; --muted:#a6a49e; --line:#3a3936; --accent:#dddbd5; }

  :root:not([data-theme="light"]) .study-nielsen { --bg:#151515; --ink:#ededed; --muted:#ababab; --line:#323232; --accent:#ff5158; }

  :root:not([data-theme="light"]) .study-norman { --bg:#141b1b; --ink:#e7efee; --muted:#8ca09e; --line:#253534; --accent:#48a397; }

  :root:not([data-theme="light"]) .study-gestalt { --bg:#171520; --ink:#eeeaf5; --muted:#9d95ae; --line:#30293d; --accent:#9f8cd6; }
  :root:not([data-theme="light"]) .study-gestalt .hero-banner { background:var(--accent); color:#171321; }

  :root:not([data-theme="light"]) .study-bauhaus { --bg:#1a1815; --ink:#eeebe4; --muted:#9c978b; --line:#38342c; --accent:#d9573a; --on-accent:#151614; }

  :root:not([data-theme="light"]) .study-grid { --bg:#151514; --ink:#efefec; --muted:#95948d; --line:#333330; --accent:#df4437; }

  :root:not([data-theme="light"]) .study-tufte { --bg:#161612; --ink:#ebe8dc; --muted:#a3a092; --line:#35352d; --accent:#e57a63; --fig-data:#77756a; --fig-faint:#2a2a23; --fig-tan:#a88f66; }

  :root:not([data-theme="light"]) .study-xie-he { --bg:#151514; --ink:#eeeee9; --muted:#95948f; --line:#333330; }

  :root:not([data-theme="light"]) .study-ji-cheng { --bg:#141b1b; --ink:#e7efee; --muted:#8ca09e; --line:#253534; --accent:#48a397; }

  :root:not([data-theme="light"]) .collection-end { background:#171b16; color:#e4e8e1; border-top-color:#2d352b; }
  :root:not([data-theme="light"]) .recap-list li { border-top-color:#2d352b; }
  :root:not([data-theme="light"]) .recap-number,
  :root:not([data-theme="light"]) .recap-list h3 span { color:#8ba085; }
  :root:not([data-theme="light"]) .recap-list p { color:#9daea6; }
  :root:not([data-theme="light"]) .site-footer { background:#0e110d; color:#c9d3c4; border-top:1px solid #2d352b; }
}

[data-theme="dark"] body { --bg:#141513; --ink:#ecece6; --muted:#999e93; --line:#2e322a; --accent:#5ba384; }
[data-theme="dark"] .contents ol { border-top-color:var(--line); }
[data-theme="dark"] .toc-number,
[data-theme="dark"] .contents small { color:var(--muted); }
[data-theme="dark"] .study { border-top-color:#ffffff12; }

[data-theme="dark"] .study-rams { --bg:#232321; --ink:#dddbd5; --muted:#a6a49e; --line:#3a3936; --accent:#dddbd5; }

[data-theme="dark"] .study-nielsen { --bg:#151515; --ink:#ededed; --muted:#ababab; --line:#323232; --accent:#ff5158; }

[data-theme="dark"] .study-norman { --bg:#141b1b; --ink:#e7efee; --muted:#8ca09e; --line:#253534; --accent:#48a397; }

[data-theme="dark"] .study-gestalt { --bg:#171520; --ink:#eeeaf5; --muted:#9d95ae; --line:#30293d; --accent:#9f8cd6; }
[data-theme="dark"] .study-gestalt .hero-banner { background:var(--accent); color:#171321; }

[data-theme="dark"] .study-bauhaus { --bg:#1a1815; --ink:#eeebe4; --muted:#9c978b; --line:#38342c; --accent:#d9573a; --on-accent:#151614; }

[data-theme="dark"] .study-grid { --bg:#151514; --ink:#efefec; --muted:#95948d; --line:#333330; --accent:#df4437; }

[data-theme="dark"] .study-tufte { --bg:#161612; --ink:#ebe8dc; --muted:#a3a092; --line:#35352d; --accent:#e57a63; --fig-data:#77756a; --fig-faint:#2a2a23; --fig-tan:#a88f66; }

[data-theme="dark"] .study-xie-he { --bg:#151514; --ink:#eeeee9; --muted:#95948f; --line:#333330; }

[data-theme="dark"] .study-ji-cheng { --bg:#141b1b; --ink:#e7efee; --muted:#8ca09e; --line:#253534; --accent:#48a397; }

[data-theme="dark"] .collection-end { background:#171b16; color:#e4e8e1; border-top-color:#2d352b; }
[data-theme="dark"] .recap-list li { border-top-color:#2d352b; }
[data-theme="dark"] .recap-number,
[data-theme="dark"] .recap-list h3 span { color:#8ba085; }
[data-theme="dark"] .recap-list p { color:#9daea6; }
[data-theme="dark"] .site-footer { background:#0e110d; color:#c9d3c4; border-top:1px solid #2d352b; }

@media print { .site-footer { display:none; } .overview { padding:0 0 32px; } .study { content-visibility:visible; contain-intrinsic-size:none; break-before:page; border:0; } .collection-end { content-visibility:visible; contain-intrinsic-size:none; break-before:page; } .recap-inner { padding:32px 0; } .recap-list li { break-inside:avoid; } }

.study-rams {
  --bg:#ecece6;
  --ink:#242521;
  --muted:#5c605b;
  --line:#c4c7be;
  --accent:#242521;
  --gutter:clamp(24px,6vw,80px);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  font-size:clamp(16px,.95rem + .2vw,18px);
  line-height:1.6;
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) .study-rams {
    --bg:#232321;
    --ink:#dddbd5;
    --muted:#a6a49e;
    --line:#3a3936;
    --accent:#dddbd5;
  }
}
:root[data-theme="dark"] .study-rams {
  --bg:#232321;
  --ink:#dddbd5;
  --muted:#a6a49e;
  --line:#3a3936;
  --accent:#dddbd5;
}
.study-rams .collection-nav {
  max-width:calc(760px + 2 * var(--gutter));
  padding-left:var(--gutter);
  padding-right:var(--gutter);
  white-space:nowrap;
}
@media (max-width:359px) {
.study-rams .collection-nav {
    font-size:10px;
    letter-spacing:.02em;
    gap:12px;
  }
.study-rams .collection-nav-actions {
    gap:12px;
  }
}
.study-rams .sheet {
  max-width:calc(760px + 2 * var(--gutter));
  padding:clamp(48px,9vw,96px) var(--gutter) clamp(32px,5vw,56px);
}
.study-rams .hero {
  gap:0;
  margin-bottom:clamp(40px,7vw,72px);
}
.study-rams .identity {
  display:block;
}
.study-rams .author {
  font-size:14px;
  font-weight:500;
  line-height:1.5;
  color:var(--muted);
}
.study-rams .section-title {
  font-size:clamp(2.6rem,1.8rem + 3.4vw,4rem);
  font-weight:400;
  letter-spacing:-.02em;
  line-height:1.08;
  margin:clamp(20px,3vw,28px) 0 clamp(16px,2.5vw,24px);
}
.study-rams .intro {
  font-size:clamp(17px,1rem + .35vw,19px);
  line-height:1.6;
  max-width:60ch;
  text-wrap:pretty;
}
.study-rams .principles>li {
  display:grid;
  grid-template-columns:clamp(32px,4vw,44px) minmax(0,1fr);
  column-gap:clamp(12px,2vw,16px);
  align-items:baseline;
  padding:clamp(20px,3.5vw,28px) 0;
  border-top:1px solid var(--line);
}
.study-rams .number {
  font:500 .8125rem/1 Inter,-apple-system,sans-serif;
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.study-rams .principles h3 {
  font-size:clamp(19px,1.1rem + .3vw,21px);
  font-weight:500;
  letter-spacing:-.01em;
  line-height:1.35;
}
.study-rams .description {
  grid-column:2;
  margin-top:6px;
  max-width:60ch;
  font-size:inherit;
  line-height:1.6;
  color:var(--muted);
  text-wrap:pretty;
}
.study-rams .source, .study-rams .page-turn {
  font-size:13px;
}
@media (min-width:1200px) {
.study-rams .collection-nav {
    max-width:calc(1200px + 2 * var(--gutter));
  }
.study-rams .sheet {
    max-width:calc(1200px + 2 * var(--gutter));
    display:grid;
    grid-template-columns:minmax(0,5fr) minmax(0,7fr);
    column-gap:clamp(64px,7vw,128px);
    align-items:start;
  }
.study-rams .hero {
    position:sticky;
    top:56px;
    margin-bottom:0;
  }
.study-rams .principles, .study-rams .source {
    grid-column:2;
  }
.study-rams .page-turn {
    grid-column:1/-1;
  }
.study-rams .principles>li:first-child {
    border-top:0;
    padding-top:0;
  }
}
@media print {
.study-rams .hero {
    position:static;
  }
}

.study-ideo {
  --bg:#fff9ef;
  --ink:#223f3a;
  --muted:#49655e;
  --line:#d6e0d5;
  --accent:#225d4b;
  font-family:"DM Sans",Arial,sans-serif;
}
.study-ideo .sheet {
  max-width:900px;
  padding-inline:52px;
}
.study-ideo .author {
  color:var(--accent);
  font-size:20px;
  font-weight:700;
}
.study-ideo .identity .eyebrow {
  font-family:inherit;
  font-size:11px;
  font-weight:700;
}
.study-ideo .field-heading {
  display:grid;
  grid-template-columns:1fr 220px;
  gap:32px;
  align-items:center;
  margin-top:12px;
}
.study-ideo .section-title {
  font-weight:700;
  font-size:clamp(3.5rem,8vw,4.5rem);
  color:var(--accent);
  letter-spacing:-.055em;
}
.study-ideo .hand-note {
  font:27px/1.35 "Kalam",cursive;
  transform:rotate(-4deg);
  padding:20px 24px;
  background:#f6e9a6;
}
.study-ideo .hand-note small {
  display:block;
  font:12px "DM Sans",sans-serif;
  margin-top:12px;
  letter-spacing:.06em;
}
.study-ideo .intro {
  font-size:17px;
}
.study-ideo .principles {
  display:grid;
  gap:14px;
}
.study-ideo .principles>li {
  display:grid;
  grid-template-columns:44px 1fr;
  gap:20px;
  padding:24px;
  border-radius:3px;
  background:#e9f1df;
  --edge:#b9dba6;
}
.study-ideo .principles>li:nth-child(4n+2) {
  background:#f7d6cf;
  --edge:#f2a99a;
}
.study-ideo .principles>li:nth-child(4n+3) {
  background:#d7e9eb;
  --edge:#9fd0d6;
}
.study-ideo .principles>li:nth-child(4n) {
  background:#f6e9a6;
  --edge:#f1dd7c;
}
.study-ideo .number {
  font:28px/1.2 "Kalam",cursive;
  color:var(--accent);
}
.study-ideo .principles h3 {
  font-size:22px;
}
.study-ideo .description {
  font-size:17px;
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) .study-ideo {
    --bg:#16181d;
    --ink:#e9ebef;
    --muted:#9aa1ad;
    --line:#2a2e36;
    --accent:#8fd3b4;
  }
:root:not([data-theme="light"]) .study-ideo .principles>li {
    background:#1e2128;
    border-left:4px solid var(--edge);
  }
:root:not([data-theme="light"]) .study-ideo .number {
    color:var(--edge);
  }
:root:not([data-theme="light"]) .study-ideo .hand-note {
    background:#f3e08a;
    color:#2b2a1c;
    border:0;
    box-shadow:0 14px 30px #00000080;
  }
}
:root[data-theme="dark"] .study-ideo {
  --bg:#16181d;
  --ink:#e9ebef;
  --muted:#9aa1ad;
  --line:#2a2e36;
  --accent:#8fd3b4;
}
:root[data-theme="dark"] .study-ideo .principles>li {
  background:#1e2128;
  border-left:4px solid var(--edge);
}
:root[data-theme="dark"] .study-ideo .number {
  color:var(--edge);
}
:root[data-theme="dark"] .study-ideo .hand-note {
  background:#f3e08a;
  color:#2b2a1c;
  border:0;
  box-shadow:0 14px 30px #00000080;
}
@media(max-width:680px) {
.study-ideo .sheet {
    padding-inline:24px;
  }
.study-ideo .field-heading {
    grid-template-columns:1fr 120px;
    gap:14px;
  }
.study-ideo .hand-note {
    font-size:21px;
    padding:14px;
  }
.study-ideo .hand-note small {
    font-size:10px;
  }
.study-ideo .field-heading .section-title {
    font-size:clamp(2.5rem,10vw,4rem);
  }
.study-ideo .principles>li {
    grid-template-columns:30px 1fr;
    gap:14px;
    padding:20px;
  }
}

.study-nielsen {
  --ink:#151515;
  --muted:#4f4f4f;
  --line:#d9d9d9;
  --accent:#bb181c;
  --accent-fill:#bb181c;
  --stage:#f5f5f5;
  --surface:#fff;
  --surface-line:#d9d9d9;
  --track:#e4e4e4;
  --soft:#9a9a9a;
  --pop:#151515;
  --on-pop:#fff;
  --inter:"Inter","Source Sans 3",Arial,sans-serif;
}
:root[data-theme="dark"] .study-nielsen {
  --bg:#151515;
  --ink:#ededed;
  --muted:#ababab;
  --line:#323232;
  --accent:#ff5158;
  --accent-fill:#cb2128;
  --stage:#1f1f1f;
  --surface:#2a2a2a;
  --surface-line:#3d3d3d;
  --track:#3d3d3d;
  --soft:#6f6f6f;
  --pop:#ededed;
  --on-pop:#151515;
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) .study-nielsen {
    --bg:#151515;
    --ink:#ededed;
    --muted:#ababab;
    --line:#323232;
    --accent:#ff5158;
    --accent-fill:#cb2128;
    --stage:#1f1f1f;
    --surface:#2a2a2a;
    --surface-line:#3d3d3d;
    --track:#3d3d3d;
    --soft:#6f6f6f;
    --pop:#ededed;
    --on-pop:#151515;
  }
}
.study-nielsen .hero {
  border-top:6px solid var(--accent-fill);
  padding-top:22px;
  margin-bottom:48px;
}
.study-nielsen .author {
  font:600 12px/1.4 var(--inter);
  text-transform:uppercase;
  letter-spacing:.08em;
}
.study-nielsen .section-title {
  font-family:"Source Sans 3",sans-serif;
  font-weight:700;
  font-size:clamp(3.5rem,7vw,4.6rem);
  letter-spacing:-.035em;
  line-height:.98;
}
.study-nielsen .subtitle {
  font-family:"Source Serif 4",Georgia,serif;
  font-size:22px;
  line-height:1.4;
  max-width:640px;
}
.study-nielsen .intro {
  font-size:18px;
  max-width:660px;
}
.study-nielsen .principles {
  border-top:1px solid var(--line);
}
.study-nielsen .principles>li {
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  column-gap:64px;
  align-items:center;
  padding:48px 0;
  border-bottom:1px solid var(--line);
}
.study-nielsen .number {
  display:block;
  font:700 14px/1 var(--inter);
  letter-spacing:.04em;
  color:var(--accent);
  margin-bottom:12px;
}
.study-nielsen .principles h3 {
  font-size:23px;
  line-height:1.2;
  letter-spacing:-.01em;
  margin-bottom:8px;
}
.study-nielsen .description {
  font-size:17px;
  line-height:1.5;
  color:var(--muted);
  max-width:360px;
}
.study-nielsen .principles>li:last-child {
  border-bottom:0;
}
.study-nielsen .copy {
  padding-bottom:34px;
}
.study-nielsen .example {
  margin:0;
}
.study-nielsen .example figcaption {
  margin-top:12px;
  font-size:15px;
  line-height:1.45;
  color:var(--muted);
}
.study-nielsen .specimen {
  background:var(--stage);
  border-radius:4px;
  height:168px;
  padding:18px;
  display:grid;
  place-items:center;
  font:15px/1.35 "Source Sans 3",sans-serif;
  color:var(--ink);
  overflow:hidden;
}
.study-nielsen .ui-card {
  width:100%;
  max-width:280px;
  background:var(--surface);
  border:1px solid var(--surface-line);
  border-radius:8px;
  padding:14px 16px;
  box-shadow:0 1px 2px #0000000f,0 4px 14px #0000000a;
}
.study-nielsen .ui-row {
  display:flex;
  align-items:center;
  gap:10px;
}
.study-nielsen .ui-spread {
  justify-content:space-between;
}
.study-nielsen .ui-end {
  justify-content:flex-end;
}
.study-nielsen .ui-small {
  font-size:13px;
  color:var(--muted);
}
.study-nielsen .ui-strong {
  color:var(--ink);
  font-weight:700;
}
.study-nielsen .ui-icon {
  width:18px;
  height:18px;
  flex:none;
  fill:none;
  stroke:currentColor;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.study-nielsen .ui-tile {
  width:36px;
  height:36px;
  border-radius:6px;
  background:var(--stage);
  display:grid;
  place-items:center;
  flex:none;
}
.study-nielsen .ui-track {
  height:6px;
  border-radius:3px;
  background:var(--track);
  margin:12px 0 8px;
  overflow:hidden;
}
.study-nielsen .ui-fill {
  display:block;
  height:100%;
  width:62%;
  background:var(--ink);
}
.study-nielsen .ui-btn {
  display:inline-flex;
  align-items:center;
  border-radius:6px;
  padding:6px 13px;
  font-size:14px;
  border:1px solid var(--surface-line);
  background:var(--surface);
  white-space:nowrap;
}
.study-nielsen .ui-primary {
  background:var(--ink);
  border-color:var(--ink);
  color:var(--bg);
  font-weight:700;
}
.study-nielsen .ui-push {
  margin-left:auto;
}
.study-nielsen .ui-wide {
  justify-content:center;
  width:100%;
  margin-top:10px;
}
.study-nielsen .ui-toast {
  width:100%;
  max-width:300px;
  background:var(--pop);
  color:var(--on-pop);
  border-radius:8px;
  padding:13px 16px;
  box-shadow:0 6px 18px #00000026;
}
.study-nielsen .ui-toast strong {
  text-decoration:underline;
  text-underline-offset:.2em;
}
.study-nielsen .ui-title {
  font-weight:700;
  margin-bottom:12px;
}
.study-nielsen .ui-cal-card {
  max-width:250px;
  padding:10px 12px;
}
.study-nielsen .ui-cal-head {
  margin-bottom:4px;
}
.study-nielsen .ui-cal {
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:3px;
  text-align:center;
  font-size:13px;
  font-variant-numeric:tabular-nums;
}
.study-nielsen .ui-cal span {
  line-height:24px;
  border-radius:5px;
}
.study-nielsen .ui-cal .wd {
  color:var(--muted);
  font-size:11px;
  line-height:16px;
}
.study-nielsen .ui-cal .past {
  color:var(--soft);
  text-decoration:line-through;
}
.study-nielsen .ui-cal .today {
  box-shadow:inset 0 0 0 1.5px var(--ink);
}
.study-nielsen .ui-cal .picked {
  background:var(--ink);
  color:var(--bg);
  font-weight:700;
}
.study-nielsen .ui-list {
  display:grid;
  gap:9px;
  margin-top:8px;
}
.study-nielsen .ui-menu {
  padding:6px;
  max-width:230px;
}
.study-nielsen .ui-menu .ui-row {
  padding:6px 10px;
  border-radius:5px;
}
.study-nielsen .ui-menu .ui-row:first-child {
  background:var(--stage);
}
.study-nielsen .ui-key {
  margin-left:auto;
  color:var(--muted);
  font-size:13px;
  letter-spacing:.06em;
}
.study-nielsen .ui-narrow {
  max-width:250px;
}
.study-nielsen .ui-label {
  font-size:13px;
  font-weight:700;
  margin-bottom:5px;
}
.study-nielsen .ui-field {
  border:1px solid var(--surface-line);
  border-radius:6px;
  padding:7px 10px;
  font-size:14px;
  color:var(--muted);
  background:var(--surface);
}
.study-nielsen .ui-field-error {
  border-color:var(--accent-fill);
  box-shadow:0 0 0 2px color-mix(in srgb,var(--accent-fill) 20%,transparent);
  color:var(--ink);
  font-variant-numeric:tabular-nums;
}
.study-nielsen .ui-error {
  color:var(--accent);
  font-size:13px;
  margin-top:7px;
}
.study-nielsen .ui-setting {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-weight:700;
}
.study-nielsen .ui-switch {
  width:34px;
  height:20px;
  border-radius:10px;
  background:var(--ink);
  position:relative;
  flex:none;
}
.study-nielsen .ui-switch::after {
  content:"";
  position:absolute;
  top:3px;
  right:3px;
  width:14px;
  height:14px;
  border-radius:50%;
  background:var(--surface);
}
.study-nielsen .ui-setting-help {
  margin-top:6px;
  line-height:1.4;
}
.study-nielsen .ui-link {
  display:inline-block;
  margin-top:8px;
  font-size:13px;
  font-weight:700;
  text-decoration:underline;
  text-underline-offset:.2em;
}
@media(max-width:860px) {
.study-nielsen .principles>li {
    column-gap:36px;
  }
.study-nielsen .principles h3 {
    font-size:21px;
  }
}
@media(max-width:680px) {
.study-nielsen .principles>li {
    grid-template-columns:minmax(0,1fr);
    row-gap:20px;
    padding:32px 0 36px;
  }
.study-nielsen .principles h3 {
    font-size:21px;
  }
.study-nielsen .description {
    max-width:none;
  }
.study-nielsen .copy {
    padding-bottom:0;
  }
.study-nielsen .specimen {
    height:156px;
    padding:14px;
  }
}

.study-norman {
  --bg:#f8f7f2;
  --ink:#243b3b;
  --muted:#596967;
  --line:#d5deda;
  --accent:#24675f;
}
.study-norman .sheet {
  max-width:920px;
  padding-inline:60px;
}
.study-norman .author {
  font-size:13px;
  text-transform:uppercase;
  letter-spacing:.07em;
  font-weight:700;
  color:var(--accent);
}
.study-norman .section-title {
  font-family:var(--serif);
  font-size:clamp(3.2rem,7vw,3.65rem);
  letter-spacing:-.035em;
}
.study-norman .intro {
  font-size:18px;
}
.study-norman .principles {
  border-top:2px solid var(--ink);
}
.study-norman .principles>li {
  display:grid;
  grid-template-columns:244px 1fr;
  gap:32px;
  align-items:center;
  padding:26px 0;
  border-bottom:1px solid var(--line);
  min-height:210px;
}
.study-norman .principles h3 {
  font:600 29px/1.2 var(--serif);
  margin:10px 0;
}
.study-norman .number {
  font:700 12px var(--sans);
  letter-spacing:.06em;
  color:var(--accent);
}
.study-norman .description {
  font-size:19px;
}
.study-norman .diagram img {
  width:244px;
  height:180px;
  object-fit:contain;
}
@media(max-width:680px) {
.study-norman .sheet {
    padding-inline:24px;
  }
.study-norman .principles>li {
    grid-template-columns:1fr;
    gap:18px;
    padding:30px 0;
  }
.study-norman .diagram {
    max-width:244px;
  }
.study-norman .copy {
    grid-row:1;
  }
.study-norman .diagram img {
    width:100%;
    height:auto;
  }
}

.study-gestalt {
  --bg:#f8f6f1;
  --ink:#272235;
  --muted:#656174;
  --line:#dcd6e4;
  --accent:#6452a3;
  font-family:"Space Grotesk",Arial,sans-serif;
}
.study-gestalt .sheet {
  max-width:980px;
  padding-inline:60px;
}
.study-gestalt .hero-banner {
  background:var(--accent);
  color:#fff;
  padding:36px 40px;
  display:grid;
  gap:28px;
}
.study-gestalt .hero-banner .author {
  font:12px var(--mono);
  text-transform:uppercase;
  letter-spacing:.08em;
}
.study-gestalt .hero-banner .section-title {
  font-weight:700;
  font-size:clamp(3.4rem,8vw,4.8rem);
  letter-spacing:-.055em;
}
.study-gestalt .hero .subtitle {
  font-size:16px;
  color:var(--accent);
}
.study-gestalt .intro {
  font-size:18px;
}
.study-gestalt .principles>li {
  display:grid;
  grid-template-columns:minmax(0,1fr) 330px;
  gap:40px;
  border-top:1px solid var(--line);
  padding:30px 0;
  align-items:center;
  min-height:238px;
}
.study-gestalt .number {
  color:var(--accent);
  font-size:13px;
}
.study-gestalt .principles h3 {
  font-size:30px;
  margin:12px 0;
}
.study-gestalt .description {
  font-size:18px;
}
.study-gestalt .diagram img {
  width:330px;
  height:auto;
}
.study-gestalt .diagram figcaption {
  font-size:11px;
}
@media(max-width:680px) {
.study-gestalt .sheet {
    padding-inline:24px;
  }
.study-gestalt .hero-banner {
    padding:26px;
  }
.study-gestalt .hero-banner .section-title {
    font-size:clamp(2.6rem,10vw,4rem);
  }
.study-gestalt .principles>li {
    grid-template-columns:1fr;
    gap:24px;
  }
.study-gestalt .diagram {
    max-width:330px;
  }
.study-gestalt .diagram img {
    width:100%;
  }
}

.study-bauhaus {
  --bg:#f0e9d7;
  --ink:#171817;
  --muted:#4d4a43;
  --line:#c2bdaf;
  --accent:#c4472b;
  --on-accent:#fff;
  font-family:"Jost",Arial,sans-serif;
}
:root[data-theme="dark"] .study-bauhaus {
  --accent:#d9573a;
  --on-accent:#151614;
}
.study-bauhaus .sheet {
  position:relative;
  max-width:1000px;
  padding-left:136px;
  padding-right:56px;
}
.study-bauhaus .spine {
  position:absolute;
  top:56px;
  bottom:40px;
  left:40px;
  width:48px;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  padding:24px 0;
  background:var(--accent);
  color:var(--on-accent);
  writing-mode:vertical-rl;
  transform:rotate(180deg);
  font-size:15px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:lowercase;
}
.study-bauhaus .hero {
  gap:0;
  margin-bottom:48px;
}
.study-bauhaus .identity {
  font-size:17px;
  font-weight:500;
  text-transform:lowercase;
}
.study-bauhaus .section-title {
  width:fit-content;
  margin:28px 0 0 -.04em;
  padding-bottom:22px;
  border-bottom:16px solid var(--ink);
  font-size:clamp(4.5rem,13vw,9.5rem);
  font-weight:700;
  letter-spacing:-.07em;
  line-height:.8;
}
.study-bauhaus .lede {
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:40px;
  margin-top:32px;
}
.study-bauhaus .subtitle {
  font-size:34px;
  font-weight:500;
  line-height:1.05;
  text-transform:lowercase;
}
.study-bauhaus .intro {
  font-size:18px;
  padding-top:4px;
}
.study-bauhaus .principles {
  border-top:5px solid var(--ink);
}
.study-bauhaus .principles>li {
  display:grid;
  grid-template-columns:96px minmax(0,1fr);
  align-items:baseline;
  border-bottom:1px solid var(--line);
  padding:26px 0 28px;
}
.study-bauhaus .bauhaus-number {
  color:var(--accent);
  font-size:68px;
  font-weight:700;
  letter-spacing:-.05em;
  line-height:.8;
}
.study-bauhaus .copy {
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);
  gap:32px;
  align-items:baseline;
}
.study-bauhaus .principles h3 {
  margin:0;
  font-size:26px;
  font-weight:500;
  line-height:1.15;
  text-transform:lowercase;
}
.study-bauhaus .description {
  font-size:18px;
  color:var(--muted);
}
@media(max-width:760px) {
.study-bauhaus .sheet {
    padding-left:24px;
    padding-right:24px;
  }
.study-bauhaus .spine {
    position:static;
    width:auto;
    margin-bottom:28px;
    padding:10px 14px;
    justify-content:flex-start;
    writing-mode:horizontal-tb;
    transform:none;
    font-size:13px;
  }
.study-bauhaus .section-title {
    font-size:clamp(3.6rem,21vw,6rem);
    border-bottom-width:11px;
    padding-bottom:16px;
  }
.study-bauhaus .lede {
    grid-template-columns:1fr;
    gap:16px;
    margin-top:24px;
  }
.study-bauhaus .subtitle {
    font-size:28px;
  }
.study-bauhaus .principles>li {
    grid-template-columns:52px minmax(0,1fr);
    padding:22px 0 24px;
  }
.study-bauhaus .bauhaus-number {
    font-size:44px;
  }
.study-bauhaus .copy {
    grid-template-columns:1fr;
    gap:8px;
  }
.study-bauhaus .principles h3 {
    font-size:23px;
  }
}

.study-grid {
  --bg:#f5f4ef;
  --ink:#111;
  --muted:#44433f;
  --line:#bebeb6;
  --accent:#a82e24;
  font-family:"Inter",Arial,sans-serif;
}
:root[data-theme="dark"] .study-grid {
  --bg:#151514;
  --ink:#efefec;
  --muted:#a09f98;
  --line:#34342f;
  --accent:#e85a4f;
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) .study-grid {
    --bg:#151514;
    --ink:#efefec;
    --muted:#a09f98;
    --line:#34342f;
    --accent:#e85a4f;
  }
}
.study-grid .sheet {
  max-width:1200px;
  padding-inline:64px;
}
.study-grid .collection-nav {
  max-width:1200px;
}
.study-grid .hero {
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:0 24px;
  margin-bottom:44px;
}
.study-grid .author {
  grid-column:1 / 4;
  color:var(--accent);
  font-size:18px;
  font-weight:500;
}
.study-grid .collection {
  grid-column:4 / 6;
  font-size:14px;
  line-height:1.45;
  color:var(--muted);
}
.study-grid .section-title {
  grid-column:1 / 4;
  margin:20px 0 0 -.04em;
  font-size:clamp(3.25rem,11vw,8.5rem);
  font-weight:700;
  letter-spacing:-.05em;
  line-height:.92;
}
.study-grid .intro {
  grid-column:4 / 6;
  align-self:end;
  margin-top:24px;
  font-size:17px;
  line-height:1.55;
}
.study-grid .principles {
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:0 24px;
  border-top:2px solid var(--accent);
}
.study-grid .principles>li {
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:24px 0 36px;
}
.study-grid .principles>li:nth-child(n+6) {
  border-top:1px solid var(--line);
}
.study-grid .number {
  font:400 30px/1 "Inter",sans-serif;
  letter-spacing:-.04em;
  color:var(--ink);
}
.study-grid .principles h3 {
  margin-top:6px;
  font-size:17px;
  font-weight:500;
  line-height:1.3;
}
.study-grid .description {
  font-size:15px;
  line-height:1.5;
  color:var(--muted);
}
@media(max-width:1080px) {
.study-grid .principles {
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:0 32px;
  }
.study-grid .principles>li:nth-child(n+3) {
    border-top:1px solid var(--line);
  }
.study-grid .principles h3 {
    font-size:19px;
  }
.study-grid .description {
    font-size:16px;
  }
}
@media(max-width:860px) {
.study-grid .hero {
    grid-template-columns:minmax(0,1fr) auto;
    gap:0 24px;
  }
.study-grid .author {
    grid-column:1;
  }
.study-grid .collection {
    grid-column:2;
    text-align:right;
  }
.study-grid .section-title {
    grid-column:1 / -1;
  }
.study-grid .intro {
    grid-column:1 / -1;
    max-width:36em;
  }
}
@media(max-width:600px) {
.study-grid .sheet {
    padding-inline:24px;
  }
.study-grid .collection-nav {
    padding-inline:24px;
  }
.study-grid .hero {
    grid-template-columns:minmax(0,1fr);
    margin-bottom:32px;
  }
.study-grid .collection {
    grid-column:1;
    text-align:left;
    margin-top:4px;
  }
.study-grid .section-title {
    margin-top:24px;
    font-size:clamp(3.25rem,19vw,5rem);
  }
.study-grid .principles {
    grid-template-columns:minmax(0,1fr);
  }
.study-grid .principles>li {
    display:grid;
    grid-template-columns:44px minmax(0,1fr);
    gap:6px 16px;
    padding:20px 0 24px;
  }
.study-grid .principles>li:nth-child(n+2) {
    border-top:1px solid var(--line);
  }
.study-grid .number {
    grid-row:span 2;
    font-size:24px;
    padding-top:2px;
  }
.study-grid .principles h3 {
    margin-top:0;
    font-size:18px;
  }
.study-grid .principles .description {
    grid-column:2;
  }
}

.study-tufte {
  --bg:#fffff8;
  --ink:#151513;
  --muted:#66655b;
  --line:#dcd9c9;
  --accent:#a3271b;
  --fig-data:#8a887c;
  --fig-faint:#ece9da;
  --fig-tan:#d7bf98;
  font-family:"ET Book",Palatino,"Palatino Linotype",Georgia,serif;
}
:root[data-theme="dark"] .study-tufte {
  --bg:#161612;
  --ink:#ebe8dc;
  --muted:#a3a092;
  --line:#35352d;
  --accent:#e57a63;
  --fig-data:#77756a;
  --fig-faint:#2a2a23;
  --fig-tan:#a88f66;
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) .study-tufte {
    --bg:#161612;
    --ink:#ebe8dc;
    --muted:#a3a092;
    --line:#35352d;
    --accent:#e57a63;
    --fig-data:#77756a;
    --fig-faint:#2a2a23;
    --fig-tan:#a88f66;
  }
}
.study-tufte .sheet {
  max-width:1020px;
}
.study-tufte .author {
  font-style:italic;
  font-size:22px;
  color:var(--accent);
}
.study-tufte .section-title {
  font-size:clamp(2.9rem,6vw,3.4rem);
  letter-spacing:-.01em;
}
.study-tufte .subtitle {
  font-style:italic;
  font-size:22px;
}
.study-tufte .intro {
  font-size:20px;
  max-width:600px;
  color:var(--ink);
}
.study-tufte .principles {
  border-top:1px solid var(--line);
  padding-top:32px;
}
.study-tufte .principles>li {
  display:grid;
  grid-template-columns:24px minmax(0,1fr) 286px;
  gap:0 36px;
  margin-bottom:40px;
  align-items:start;
}
.study-tufte .number {
  font:18px/1.55 "ET Book",Palatino,Georgia,serif;
  color:var(--accent);
}
.study-tufte .principles h3 {
  display:inline;
  font:700 20px/1.55 "ET Book",Palatino,Georgia,serif;
}
.study-tufte .description {
  display:inline;
  font-size:20px;
  line-height:1.55;
}
.study-tufte .marginalia {
  font-size:14px;
  line-height:1.4;
  color:var(--muted);
  padding-top:4px;
}
.study-tufte .figure-chart {
  display:block;
  width:100%;
  max-width:286px;
  height:auto;
  overflow:visible;
  font-family:"ET Book",Palatino,Georgia,serif;
}
.study-tufte .figure-clip {
  overflow:hidden;
}
.study-tufte .figure-pair {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  max-width:286px;
}
.study-tufte .figure-caption {
  margin-top:6px;
  font-style:italic;
  font-size:14px;
  line-height:1.4;
  color:var(--muted);
}
.study-tufte .margin-sentence {
  font-size:17px;
  line-height:1.5;
  color:var(--ink);
}
.study-tufte .sparkline {
  display:inline;
  vertical-align:-1px;
  margin:0 2px;
}
.study-tufte .figure-accent {
  color:var(--accent);
}
.study-tufte .source {
  font-size:15px;
  font-style:italic;
}
.study-tufte .source a {
  font-style:normal;
}
@media(max-width:860px) {
.study-tufte .principles>li {
    grid-template-columns:24px minmax(0,1fr);
    gap:0 16px;
  }
.study-tufte .marginalia {
    grid-column:2;
    margin-top:16px;
    max-width:360px;
  }
.study-tufte .figure-chart, .study-tufte .figure-pair {
    max-width:360px;
  }
}
@media(max-width:480px) {
.study-tufte .description, .study-tufte .principles h3 {
    font-size:18px;
  }
.study-tufte .principles>li {
    grid-template-columns:20px minmax(0,1fr);
    gap:0 12px;
  }
}
@media print {
.study-tufte .principles>li {
    grid-template-columns:24px minmax(0,1fr) 250px;
  }
}

.study-xie-he {
  --bg:#f5f4ef;
  --ink:#111;
  --muted:#44433f;
  --line:#bebeb6;
}
.study-xie-he .hero {
  gap:24px;
}
.study-xie-he .author {
  font-family:"Noto Serif SC",var(--serif);
  font-size:23px;
  margin-top:16px;
}
.study-xie-he .section-title {
  font-family:var(--serif);
  font-size:clamp(3.2rem,7vw,3.8rem);
  letter-spacing:-.035em;
}
.study-xie-he .subtitle {
  font-size:17px;
}
.study-xie-he .intro {
  font-size:20px;
}
.study-xie-he .principles>li {
  display:grid;
  grid-template-columns:172px minmax(0,1fr);
  gap:24px;
  border-top:1px solid var(--line);
  padding:32px 0;
}
.study-xie-he .chinese-principle {
  font:26px/1.5 "Noto Serif SC","Songti SC",serif;
  color:var(--muted);
  padding-top:2px;
  letter-spacing:.015em;
}
.study-xie-he .number {
  font-size:12px;
}
.study-xie-he .principles h3 {
  font:600 29px/1.25 var(--serif);
  margin:12px 0;
}
.study-xie-he .description {
  font-size:21px;
  line-height:1.45;
}
@media(max-width:680px) {
.study-xie-he .principles>li {
    grid-template-columns:1fr;
    gap:10px;
    padding:28px 0;
  }
.study-xie-he .chinese-principle {
    font-size:24px;
  }
.study-xie-he .principles h3 {
    font-size:27px;
  }
.study-xie-he .description {
    font-size:19px;
  }
}

.study-ji-cheng {
  --bg:#f8f7f2;
  --ink:#243b3b;
  --muted:#596967;
  --line:#d5deda;
  --accent:#24675f;
}
.study-ji-cheng .garden-heading {
  display:flex;
  justify-content:space-between;
  gap:32px;
  margin-top:12px;
}
.study-ji-cheng .author {
  font-family:"Noto Serif SC",var(--serif);
  font-size:22px;
  margin-bottom:10px;
}
.study-ji-cheng .section-title {
  font-family:var(--serif);
  font-size:clamp(3.2rem,7vw,3.8rem);
}
.study-ji-cheng .garden-title {
  font:62px/1.25 "Noto Serif SC","Songti SC",serif;
  color:var(--accent);
  writing-mode:vertical-rl;
  letter-spacing:.1em;
  margin-right:44px;
}
.study-ji-cheng .subtitle {
  font-size:17px;
}
.study-ji-cheng .intro {
  font-size:20px;
  max-width:800px;
}
.study-ji-cheng .creed {
  display:grid;
  gap:22px;
  padding-top:28px;
  border-top:1px solid var(--line);
}
.study-ji-cheng .creed-heading {
  font:12px/1.5 var(--mono);
  letter-spacing:.07em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0;
}
.study-ji-cheng .creed-row {
  display:grid;
  gap:8px;
}
.study-ji-cheng .creed-line {
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px 22px;
  font:29px/1.3 "Noto Serif SC","Songti SC",serif;
  letter-spacing:.03em;
  color:var(--accent);
  margin:0;
}
.study-ji-cheng .creed-chapter {
  font:12px/1.5 var(--mono);
  letter-spacing:.05em;
  color:var(--muted);
}
.study-ji-cheng .creed-gloss {
  font-size:20px;
  line-height:1.45;
  max-width:800px;
  margin:0;
}
.study-ji-cheng .landscape {
  margin:32px 0;
}
.study-ji-cheng .landscape img {
  width:100%;
  height:auto;
  aspect-ratio:872/230;
}
.study-ji-cheng .landscape-labels {
  display:grid;
  grid-template-columns:1fr 1.28fr 1fr;
  gap:20px;
  font:11px/1.5 var(--mono);
  color:var(--muted);
  margin-top:14px;
}
.study-ji-cheng .landscape-labels span:nth-child(2) {
  text-align:center;
}
.study-ji-cheng .landscape-labels span:last-child {
  text-align:right;
}
.study-ji-cheng .landscape figcaption {
  font-size:14px;
  color:var(--muted);
  margin-top:16px;
}
.study-ji-cheng .principles>li {
  display:grid;
  grid-template-columns:176px 1fr;
  gap:24px;
  border-top:1px solid var(--line);
  padding:32px 0;
}
.study-ji-cheng .index {
  display:grid;
  gap:8px;
  align-content:start;
}
.study-ji-cheng .index .number {
  font:40px/1.1 var(--serif);
  color:var(--accent);
}
.study-ji-cheng .index .eyebrow {
  font-size:11px;
}
.study-ji-cheng .principles h3 {
  font:600 29px/1.25 var(--serif);
}
.study-ji-cheng .description {
  font-size:21px;
  line-height:1.45;
}
.study-ji-cheng .source a {
  color:var(--accent);
}
@media(max-width:680px) {
.study-ji-cheng .garden-title {
    font-size:46px;
    margin-right:0;
  }
.study-ji-cheng .garden-heading {
    gap:16px;
  }
.study-ji-cheng .garden-heading .section-title {
    font-size:clamp(2.8rem,9vw,3.8rem);
  }
.study-ji-cheng .principles>li {
    grid-template-columns:68px 1fr;
    gap:16px;
  }
.study-ji-cheng .index .number {
    font-size:33px;
  }
.study-ji-cheng .index .eyebrow {
    font-size:9px;
    letter-spacing:0;
  }
.study-ji-cheng .principles h3 {
    font-size:26px;
  }
.study-ji-cheng .description {
    font-size:19px;
  }
.study-ji-cheng .landscape-labels {
    font-size:8px;
    gap:8px;
  }
.study-ji-cheng .creed {
    gap:18px;
    padding-top:24px;
  }
.study-ji-cheng .creed-line {
    font-size:23px;
  }
.study-ji-cheng .creed-gloss {
    font-size:18px;
  }
}