/* ============================================================================
   Claude for Legal — A Guided Tour of the Plugins
   Design system: "law library, after hours."
   Warm paper + ink + bankers-lamp green + brass. Editorial serif typography
   (Fraunces display / Alegreya prose / Alegreya Sans UI / Spline Sans Mono code).
   Vanilla CSS. Light + dark via prefers-color-scheme and manual [data-theme].
   All class names preserved from v1 — zero JS/markup contract changes.
   ========================================================================== */

:root {
  /* paper & ink (light) */
  --bg:            #f7f3e9;   /* aged paper */
  --bg-elev:       #fdfbf4;   /* fresh sheet */
  --bg-sunken:     #efe9d9;   /* shelf shadow */
  --ink:           #21271f;   /* iron-gall ink */
  --ink-soft:      #4c5247;
  --ink-faint:     #79806f;
  --line:          #ddd5bf;
  --line-strong:   #c4baa0;

  /* the lamp */
  --accent:        #1d5c44;   /* bankers green */
  --accent-deep:   #15473500;
  --accent-ink:    #f7f3e9;
  --brass:         #a8802f;   /* brass fittings */
  --brass-soft:    #c19a45;
  --link:          #1d5c44;
  --code-bg:       #efeada;
  --code-ink:      #2c3128;

  /* callout families */
  --c-concept:     #3d5a80;   /* slate blue — ideas */
  --c-concept-bg:  #eceee6;
  --c-example:     #1d5c44;   /* green — the running story */
  --c-example-bg:  #e9efe4;
  --c-gov:         #7c3626;   /* oxblood — governance */
  --c-gov-bg:      #f4e9e0;
  --c-golive:      #5b4a7a;   /* aubergine — do it for real */
  --c-golive-bg:   #edeaee;
  --c-warn:        #99371f;   /* brick */
  --c-warn-bg:     #f6e7dd;

  /* type */
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font:         "Alegreya", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-ui:      "Alegreya Sans", -apple-system, "Segoe UI", Roboto, Helvetica, sans-serif;
  --mono:         "Spline Sans Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --maxprose: 740px;
  --sidebar-w: 284px;
  --r: 6px;
  --r-sm: 4px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:            #141811;   /* green-black, the lampshade */
    --bg-elev:       #1b211a;
    --bg-sunken:     #10140e;
    --ink:           #e9e2cd;   /* cream by lamplight */
    --ink-soft:      #bdb7a2;
    --ink-faint:     #8a8674;
    --line:          #2c3328;
    --line-strong:   #414c3a;
    --accent:        #63b58e;
    --accent-ink:    #11150f;
    --brass:         #cda44e;
    --brass-soft:    #b08c3a;
    --link:          #7cc4a0;
    --code-bg:       #191f17;
    --code-ink:      #d8d2ba;
    --c-concept:     #92aed0; --c-concept-bg: #1a2027;
    --c-example:     #8cc7a8; --c-example-bg: #18211b;
    --c-gov:         #d9926f; --c-gov-bg:     #251a14;
    --c-golive:      #b2a0d6; --c-golive-bg:  #1e1a26;
    --c-warn:        #e09778; --c-warn-bg:    #271611;
  }
}
/* manual dark */
:root[data-theme="dark"] {
  --bg:#141811; --bg-elev:#1b211a; --bg-sunken:#10140e;
  --ink:#e9e2cd; --ink-soft:#bdb7a2; --ink-faint:#8a8674;
  --line:#2c3328; --line-strong:#414c3a;
  --accent:#63b58e; --accent-ink:#11150f;
  --brass:#cda44e; --brass-soft:#b08c3a; --link:#7cc4a0;
  --code-bg:#191f17; --code-ink:#d8d2ba;
  --c-concept:#92aed0; --c-concept-bg:#1a2027;
  --c-example:#8cc7a8; --c-example-bg:#18211b;
  --c-gov:#d9926f; --c-gov-bg:#251a14;
  --c-golive:#b2a0d6; --c-golive-bg:#1e1a26;
  --c-warn:#e09778; --c-warn-bg:#271611;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 17.5px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* paper grain + a faint pool of lamplight at the top of the page */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(110% 38% at 50% -6%, rgba(168,128,47,.075), transparent 62%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.05'/%3E%3C/svg%3E");
}
body > * { position: relative; z-index: 1; }

a { color: var(--link); text-decoration-color: color-mix(in srgb, var(--brass) 55%, transparent); text-underline-offset: 3px; transition: color .15s ease; }
a:hover { color: var(--brass); text-decoration-color: currentColor; }

::selection { background: color-mix(in srgb, var(--brass) 28%, transparent); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 0 0 var(--r-sm) 0;
  font-family: var(--font-ui);
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; border-radius: 2px; }

/* ---- Banner — a thin brass rule with a rubber stamp -------------------- */
.banner {
  background: var(--bg-elev);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--brass) 24%, transparent);
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--ink-soft);
  display: flex; align-items: center; gap: 14px;
  padding: 8px 18px;
  position: sticky; top: 0; z-index: 30;
}
.banner__beta {
  background: transparent;
  color: var(--brass);
  border: 1.5px solid currentColor;
  font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  font-size: 10px; padding: 2px 9px 1px; border-radius: 3px; white-space: nowrap;
  transform: rotate(-1.2deg);
}
.banner__msg { flex: 1; min-width: 0; }
.banner__btn {
  font-family: var(--font-ui);
  background: transparent; border: 1px solid var(--line-strong); color: var(--ink-soft);
  border-radius: var(--r-sm); padding: 4px 10px; cursor: pointer; font-size: 12.5px;
  transition: border-color .15s ease, color .15s ease;
}
.banner__btn:hover { border-color: var(--brass); color: var(--brass); }
.banner__hamburger { display: none; }

/* ---- Layout -------------------------------------------------------------- */
.layout { display: flex; align-items: flex-start; gap: 0; }
.sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  border-right: 1px solid var(--line);
  background: var(--bg-elev);
  position: sticky; top: 41px;
  height: calc(100vh - 41px);
  overflow-y: auto;
  padding: 26px 16px 60px;
}
.main {
  flex: 1 1 auto; min-width: 0;
  padding: 44px clamp(22px, 5.5vw, 64px) 90px;
}
.main > * { max-width: var(--maxprose); }
.main > .wide, .main .widget, .main .codeblock, .main figure.wide, .main .surface-compare { max-width: 960px; }

/* one quiet, staggered page-load rise */
@media (prefers-reduced-motion: no-preference) {
  @keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
  .main > * { animation: rise .55s cubic-bezier(.22,.8,.36,1) both; }
  .main > *:nth-child(1) { animation-delay: .03s; }
  .main > *:nth-child(2) { animation-delay: .09s; }
  .main > *:nth-child(3) { animation-delay: .15s; }
  .main > *:nth-child(4) { animation-delay: .21s; }
  .main > *:nth-child(5) { animation-delay: .27s; }
  .main > *:nth-child(n+6) { animation-delay: .33s; }
}

/* ---- Sidebar nav --------------------------------------------------------- */
.nav__brand {
  display: block;
  font-family: var(--font-display);
  font-weight: 650; font-size: 19px; letter-spacing: -.01em;
  color: var(--ink); text-decoration: none;
  margin: 0 8px 2px;
}
.nav__brand:hover { color: var(--accent); }
.nav__sub {
  font-family: var(--font-ui);
  font-size: 10.5px; font-weight: 600; color: var(--brass);
  text-transform: uppercase; letter-spacing: .16em;
  margin: 0 8px 20px;
}
.nav__list { list-style: none; margin: 0; padding: 0; }
.nav__item a {
  display: flex; gap: 10px; align-items: baseline;
  padding: 9px 10px; border-left: 2px solid transparent;
  color: var(--ink-soft); text-decoration: none;
  font-family: var(--font-ui); font-size: 14.5px; line-height: 1.35;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.nav__item a:hover { color: var(--ink); border-left-color: var(--line-strong); background: var(--bg-sunken); }
.nav__item a[aria-current="page"] {
  border-left-color: var(--brass);
  color: var(--accent); font-weight: 700;
  background: color-mix(in srgb, var(--accent) 7%, transparent);
}
.nav__num {
  font-family: var(--font-display); font-style: italic;
  font-variant-numeric: tabular-nums; color: var(--brass);
  min-width: 1.5em; font-size: 13px;
}
.nav__tick { margin-left: auto; color: var(--c-example); font-weight: 700; }
.nav__item a[aria-current="page"] .nav__tick { color: var(--accent); }

/* the "coming next" rows — quiet entries in the card catalog, no pills */
.nav__soon {
  display: flex; gap: 10px; align-items: baseline;
  padding: 8px 10px; border-left: 2px solid transparent;
  font-family: var(--font-ui); font-size: 13.5px; color: var(--ink-faint);
}
.nav__soon .nav__num { opacity: .55; }
.nav__badge {
  margin-left: auto;
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--font-ui); font-size: 9.5px; font-weight: 600;
  letter-spacing: .15em; text-transform: uppercase;
  color: var(--brass); border: 0; padding: 0; white-space: nowrap;
}
.nav__badge::before {
  content: ""; width: 6px; height: 6px; flex: none;
  border: 1.5px solid currentColor; transform: rotate(45deg);
}
.nav__divider { border: 0; border-top: 1px solid var(--line); margin: 18px 8px; }
.nav__meta a {
  font-family: var(--font-ui); font-size: 13px; color: var(--ink-faint);
  display: block; padding: 6px 10px; text-decoration: none;
}
.nav__meta a:hover { color: var(--brass); }

/* ---- Typography in main -------------------------------------------------- */
.main h1 {
  font-family: var(--font-display);
  font-weight: 620;
  font-size: clamp(2rem, 4.2vw, 2.7rem);
  line-height: 1.08; letter-spacing: -.018em;
  margin: 0 0 .25em;
}
.main h2 {
  font-family: var(--font-display);
  font-weight: 600; font-size: 1.5rem; letter-spacing: -.012em;
  margin: 2.1em 0 .55em; padding: 0; border: 0;
}
.main h2::after {
  content: ""; display: block;
  width: 44px; height: 3px; margin-top: .3em;
  background: linear-gradient(90deg, var(--brass), color-mix(in srgb, var(--brass) 18%, transparent));
  border-radius: 2px;
}
.main h3 {
  font-family: var(--font-display);
  font-weight: 600; font-size: 1.16rem; margin: 1.7em 0 .4em;
}
.lede { font-size: 1.2rem; line-height: 1.55; color: var(--ink-soft); margin: .5em 0 1.5em; }
.eyebrow {
  font-family: var(--font-ui);
  display: flex; align-items: center; gap: 10px;
  text-transform: uppercase; letter-spacing: .18em;
  font-size: 11.5px; font-weight: 700; color: var(--brass);
  margin: 0 0 .6em;
}
.eyebrow::before { content: ""; width: 22px; height: 1.5px; background: currentColor; opacity: .7; }
.minutes {
  display: inline-block;
  font-family: var(--font-ui); font-size: 12px; font-weight: 600;
  letter-spacing: .06em; color: var(--ink-faint);
  border: 1px solid var(--line-strong); border-radius: 999px; padding: 2px 11px;
}
.objectives {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brass);
  border-radius: var(--r);
  padding: 16px 20px 16px 38px;
  font-size: 16px;
}
.objectives li { margin: 5px 0; }
.objectives li::marker { color: var(--brass); }

/* ---- Callouts — marginalia panels with sigils ---------------------------- */
.callout {
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 16px 20px; margin: 1.4em 0;
  background: var(--bg-elev);
  position: relative;
}
.callout__label {
  font-family: var(--font-ui);
  font-weight: 700; font-size: 11.5px; text-transform: uppercase; letter-spacing: .1em;
  display: flex; align-items: center; gap: 8px; margin-bottom: 7px;
}
.callout__label::before {
  font-family: var(--font-display); font-style: normal;
  font-size: 15px; line-height: 1; opacity: .9;
}
.callout > :last-child { margin-bottom: 0; }
.callout--concept    { background: var(--c-concept-bg); border-color: color-mix(in srgb, var(--c-concept) 26%, transparent); }
.callout--concept .callout__label { color: var(--c-concept); }
.callout--concept .callout__label::before { content: "¶"; }
.callout--example    { background: var(--c-example-bg); border-color: color-mix(in srgb, var(--c-example) 26%, transparent); }
.callout--example .callout__label { color: var(--c-example); }
.callout--example .callout__label::before { content: "№"; }
.callout--governance { background: var(--c-gov-bg); border-color: color-mix(in srgb, var(--c-gov) 28%, transparent); }
.callout--governance .callout__label { color: var(--c-gov); }
.callout--governance .callout__label::before { content: "§"; }
.callout--golive     { background: var(--c-golive-bg); border-color: color-mix(in srgb, var(--c-golive) 26%, transparent); }
.callout--golive .callout__label { color: var(--c-golive); }
.callout--golive .callout__label::before { content: "❯"; }
.callout--warning    { background: var(--c-warn-bg); border-color: color-mix(in srgb, var(--c-warn) 30%, transparent); }
.callout--warning .callout__label { color: var(--c-warn); }
.callout--warning .callout__label::before { content: "!"; font-weight: 700; }

/* ---- Code ---------------------------------------------------------------- */
code {
  font-family: var(--mono); font-size: .82em;
  background: var(--code-bg); color: var(--code-ink);
  padding: .14em .42em; border-radius: 4px;
}
pre {
  background: var(--code-bg); color: var(--code-ink);
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 15px 17px; overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.6;
  box-shadow: inset 0 1px 4px rgba(0,0,0,.035);
}
pre code { background: none; padding: 0; font-size: inherit; }

.codeblock { margin: 1.3em 0; border: 1px solid var(--line-strong); border-radius: var(--r); overflow: hidden; background: var(--bg-elev); }
.codeblock__bar {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-sunken); border-bottom: 1px solid var(--line);
  padding: 7px 13px;
  font-family: var(--font-ui); font-size: 11px; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint);
}
.codeblock__bar .codeblock__title { font-family: inherit; color: var(--brass); }
.codeblock__copy {
  margin-left: auto;
  font-family: var(--font-ui); letter-spacing: .04em;
  background: transparent; border: 1px solid var(--line-strong); color: var(--ink-soft);
  border-radius: var(--r-sm); padding: 3px 11px; cursor: pointer; font-size: 11.5px;
  transition: border-color .15s ease, color .15s ease;
}
.codeblock__copy:hover { border-color: var(--brass); color: var(--brass); }
.codeblock pre { border: 0; border-radius: 0; margin: 0; box-shadow: none; }
.codeblock__note {
  font-family: var(--font-ui); font-size: 12.5px; color: var(--c-gov);
  background: var(--c-gov-bg); border-top: 1px solid var(--line); padding: 8px 13px;
}
.codeblock__output { border-top: 1px dashed var(--line-strong); }
.codeblock__output summary {
  cursor: pointer; padding: 8px 13px;
  font-family: var(--font-ui); font-size: 12px; color: var(--ink-faint);
  background: var(--bg-sunken);
}
.codeblock__output summary:hover { color: var(--brass); }
.codeblock__output pre { background: var(--bg); }

/* ---- Tables — editorial hairlines ---------------------------------------- */
table { border-collapse: collapse; width: 100%; margin: 1.3em 0; font-size: 15px; }
th, td { border: 0; border-bottom: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
thead th {
  font-family: var(--font-ui); font-size: 11.5px; font-weight: 700;
  letter-spacing: .09em; text-transform: uppercase; color: var(--ink-faint);
  background: transparent;
  border-bottom: 2px solid color-mix(in srgb, var(--brass) 55%, var(--line));
}
tbody tr:hover { background: color-mix(in srgb, var(--bg-sunken) 55%, transparent); }

/* ---- Generic widget shell ------------------------------------------------ */
.widget {
  border: 1px solid var(--line-strong); border-radius: var(--r);
  background: var(--bg-elev); padding: 20px 22px; margin: 1.5em 0;
  box-shadow: 0 1px 0 var(--line), 0 6px 18px -12px rgba(33,39,31,.25);
}
.widget__title { font-family: var(--font-display); font-weight: 620; margin: 0 0 4px; font-size: 1.12rem; }
.widget__hint { font-family: var(--font-ui); color: var(--ink-faint); font-size: 13.5px; margin: 0 0 14px; }
.widget__footer {
  margin-top: 16px; padding-top: 10px; border-top: 1px dashed var(--line);
  font-family: var(--font-ui); font-size: 12.5px; color: var(--ink-faint);
}
.widget__footer a { color: var(--ink-faint); }
.btn {
  font-family: var(--font-ui); font-weight: 600; letter-spacing: .03em;
  font-size: 14px; background: var(--accent); color: var(--accent-ink);
  border: 1px solid var(--accent); border-radius: var(--r-sm);
  padding: 8px 18px; cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, filter .12s ease;
}
.btn:hover { filter: brightness(1.08); box-shadow: 0 3px 10px -4px color-mix(in srgb, var(--accent) 60%, transparent); transform: translateY(-1px); }
.btn:active { transform: translateY(0); box-shadow: none; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--brass); color: var(--brass); filter: none; box-shadow: none; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.is-correct { color: var(--c-example); font-weight: 600; }
.is-wrong { color: var(--c-warn); font-weight: 600; }

/* ---- Module footer nav --------------------------------------------------- */
.modnav { display: flex; justify-content: space-between; gap: 12px; margin-top: 52px; padding-top: 22px; border-top: 1px solid var(--line); }
.modnav a, .modnav span.next {
  font-family: var(--font-ui);
  text-decoration: none; border: 1px solid var(--line-strong); border-radius: var(--r);
  padding: 12px 17px; max-width: 46%; color: var(--ink);
  transition: border-color .15s ease, transform .15s ease;
}
.modnav a:hover { border-color: var(--brass); transform: translateY(-1px); }
.modnav small {
  display: block; color: var(--brass); font-size: 10.5px;
  text-transform: uppercase; letter-spacing: .12em; font-weight: 700; margin-bottom: 2px;
}
.modnav .next { text-align: right; margin-left: auto; }
.mark-complete { margin-top: 30px; }

/* ---- Landing syllabus cards + roadmap ------------------------------------ */
.syllabus { list-style: none; padding: 0; margin: 1.5em 0; display: grid; gap: 16px; }
.syllabus__card {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--bg-elev); padding: 0; overflow: hidden;
  border-top: 3px solid var(--brass);
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.syllabus__card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong); border-top-color: var(--accent);
  box-shadow: 0 10px 26px -16px rgba(33,39,31,.4);
}
.syllabus__card a { display: block; padding: 17px 20px; text-decoration: none; color: var(--ink); }
.syllabus__card a:hover .syllabus__title { color: var(--accent); }
.syllabus__title { font-family: var(--font-display); font-weight: 620; font-size: 1.14rem; }
.syllabus__num { font-style: italic; color: var(--brass); font-variant-numeric: tabular-nums; }
.syllabus__blurb { color: var(--ink-soft); font-size: 15px; margin: .35em 0 0; }
.syllabus__min { float: right; }

.roadmap { list-style: none; padding: 0; margin: 1.2em 0; display: grid; gap: 0; }
.roadmap li {
  border: 0; border-radius: 0;
  border-bottom: 1px dashed var(--line-strong);
  background: transparent;
  padding: 11px 4px; font-size: 15px; color: var(--ink-soft);
  display: flex; gap: 12px; align-items: baseline;
}
.roadmap li:first-child { border-top: 1px dashed var(--line-strong); }
.roadmap .roadmap__num {
  font-family: var(--font-display); font-style: italic;
  color: var(--brass); font-variant-numeric: tabular-nums; min-width: 2em;
}
.roadmap .roadmap__badge {
  margin-left: auto;
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-ui); font-size: 9.5px; font-weight: 600;
  letter-spacing: .15em; text-transform: uppercase;
  color: var(--brass); border: 0; padding: 0; white-space: nowrap;
}
.roadmap .roadmap__badge::before {
  content: ""; width: 6px; height: 6px; flex: none;
  border: 1.5px solid currentColor; transform: rotate(45deg);
}

/* ---- Responsive ---------------------------------------------------------- */
@media (max-width: 860px) {
  .banner__hamburger { display: inline-block; }
  .sidebar {
    position: fixed; left: 0; top: 41px; z-index: 29;
    height: calc(100vh - 41px); transform: translateX(-100%);
    transition: transform .2s ease; box-shadow: 2px 0 16px rgba(0,0,0,.18);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  .main { padding: 26px 18px 64px; }
}
@media (prefers-reduced-motion: reduce) { .sidebar { transition: none; } }

/* ===========================================================================
   Course widgets: tiers, exhibit, copy-prompt, lab notebook, surface compare
   ========================================================================= */

/* ---- Playground tiers — chapter openings, not boxes ----------------------- */
.tier {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--bg-elev); padding: 18px 22px; margin: 1.5em 0;
  position: relative;
}
.tier::before {
  content: ""; position: absolute; left: -1px; top: 14px; bottom: 14px;
  width: 3px; border-radius: 0 2px 2px 0;
}
.tier__label {
  font-family: var(--font-ui);
  font-weight: 700; font-size: 11.5px; text-transform: uppercase; letter-spacing: .12em;
  display: flex; align-items: center; gap: 8px; margin-bottom: 4px;
}
.tier__sub { font-family: var(--font-ui); font-size: 13px; color: var(--ink-faint); margin: 0 0 12px; }
.tier > :last-child { margin-bottom: 0; }
.tier--guided::before { background: var(--c-example); }
.tier--guided .tier__label { color: var(--c-example); }
.tier--stretch::before { background: var(--brass); }
.tier--stretch .tier__label { color: var(--brass); }
.tier--free::before { background: var(--c-golive); }
.tier--free .tier__label { color: var(--c-golive); }

/* ---- Exhibit — a document laid on the desk -------------------------------- */
.exhibit {
  border: 1px solid var(--line-strong); border-radius: 3px;
  overflow: hidden; margin: 1.3em 0; background: var(--bg-elev);
  box-shadow: 0 1px 0 var(--line), 0 14px 30px -22px rgba(33,39,31,.5);
}
.exhibit__bar {
  background: var(--bg-sunken); border-bottom: 1px solid var(--line);
  padding: 7px 14px;
  font-family: var(--font-ui); font-size: 10.5px; font-weight: 700;
  color: var(--c-gov); text-transform: uppercase; letter-spacing: .14em;
}
.exhibit__bar::before { content: "⚖ "; }
.exhibit__body { padding: 16px 18px; font-size: 14.5px; }
.exhibit__body :last-child { margin-bottom: 0; }
.exhibit__cap { font-family: var(--font-ui); font-size: 12.5px; color: var(--ink-faint); padding: 0 18px 13px; }

/* ---- Copy-prompt — a coupon you clip ------------------------------------- */
.copyprompt {
  border: 1.5px dashed var(--brass-soft); border-radius: var(--r);
  overflow: hidden; margin: 1.3em 0;
  background: color-mix(in srgb, var(--brass) 6%, var(--bg-elev));
}
.copyprompt__bar {
  display: flex; align-items: center; gap: 10px; padding: 7px 13px;
  font-family: var(--font-ui); font-size: 11px; color: var(--brass);
  border-bottom: 1px dashed var(--brass-soft);
}
.copyprompt__bar b { font-weight: 700; text-transform: uppercase; letter-spacing: .12em; }
.copyprompt__copy {
  margin-left: auto;
  font-family: var(--font-ui);
  background: transparent; border: 1px solid var(--brass-soft); color: var(--brass);
  border-radius: var(--r-sm); padding: 3px 11px; cursor: pointer; font-size: 11.5px;
  transition: background .15s ease, color .15s ease;
}
.copyprompt__copy:hover { background: var(--brass); color: var(--bg-elev); }
.copyprompt pre {
  border: 0; border-radius: 0; margin: 0; box-shadow: none;
  background: transparent;
  white-space: pre-wrap; word-break: break-word;
}

/* ---- Lab notebook — a legal pad ------------------------------------------ */
.labnotebook .ln__entry { margin: 0 0 18px; }
.labnotebook .ln__prompt { font-weight: 700; font-size: 15.5px; margin: 0 0 6px; }
.labnotebook textarea {
  width: 100%;
  font-family: var(--font); font-size: 15px; line-height: 26px;
  padding: 6px 12px 6px 34px;
  border: 1px solid var(--line-strong); border-radius: 3px;
  color: var(--ink); resize: vertical; min-height: 80px;
  background:
    linear-gradient(90deg, transparent 24px, color-mix(in srgb, var(--c-warn) 38%, transparent) 24px,
      color-mix(in srgb, var(--c-warn) 38%, transparent) 25px, transparent 25px),
    repeating-linear-gradient(to bottom, transparent 0 25px, color-mix(in srgb, var(--accent) 16%, transparent) 25px 26px),
    color-mix(in srgb, var(--brass) 5%, var(--bg-elev));
  transition: border-color .15s ease;
}
.labnotebook textarea:focus { border-color: var(--brass); outline: none; }
.labnotebook .ln__saved { font-family: var(--font-ui); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--c-example); margin-left: 8px; }
.labnotebook .ln__bar { display: flex; gap: 10px; align-items: center; }

/* ---- Surface compare (Claude Code vs Cowork) ----------------------------- */
.surface-compare { display: grid; grid-template-columns: 1fr; gap: 16px; margin: 1.5em 0; }
@media (min-width: 720px) { .surface-compare { grid-template-columns: 1fr 1fr; } }
.surface {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--bg-elev); padding: 18px 20px; min-width: 0;
  border-top: 3px solid var(--accent);
}
.surface + .surface { border-top-color: var(--brass); }
.surface h3 { margin: 0 0 2px; font-size: 1.14rem; }
.surface .surface__tag { font-family: var(--font-ui); font-size: 12.5px; color: var(--ink-faint); margin: 0 0 10px; }
.surface ul { margin: 0; padding-left: 18px; font-size: 15px; }
.surface li { margin: 6px 0; }
.surface li::marker { color: var(--brass); }