/* Trade Academy
   An editorial long read rather than a marketing page: warm paper, an indigo
   ink, a serif display face and a wide left margin that carries chapter
   numbers and marginal notes. Palette from the supplied swatch.
   Sections: 1 fonts, 2 tokens, 3 base, 4 header, 5 hero, 6 sections,
   7 guide, 8 figures, 9 cards, 10 forms, 11 footer, 12 dialogs, 13 motion,
   14 print, 15 narrow screens. */

/* ---------------------------------------------------------------- 1 fonts
   Served from this origin, never from a font CDN, so that no request leaves
   the visitor's browser to a third party before the cookie choice is made.
   One variable file per family per range covers every weight the design
   uses. Both families are under the SIL Open Font License; see LICENSE.txt
   in this folder. */
@font-face{
  font-family:'Fraunces'; font-style:normal; font-weight:100 900; font-display:swap;
  src:url('../fonts/fraunces-latin-ext.woff2') format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face{
  font-family:'Fraunces'; font-style:normal; font-weight:100 900; font-display:swap;
  src:url('../fonts/fraunces-latin.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Karla'; font-style:normal; font-weight:200 800; font-display:swap;
  src:url('../fonts/karla-latin-ext.woff2') format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face{
  font-family:'Karla'; font-style:normal; font-weight:200 800; font-display:swap;
  src:url('../fonts/karla-latin.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

/* --------------------------------------------------------------- 2 tokens */
:root{
  --indigo:#1F2F98;
  --indigo-d:#16226E;
  --blue:#1CA7EC;
  --aqua:#4ADEDE;
  --ink:#0B1533;
  --ink-2:#39435F;
  --mute:#6B7590;
  --paper:#F7F9FC;
  --paper-2:#EDF2F9;
  --card:#FFFFFF;
  --rule:#D9E2EE;
  --rule-soft:#E8EEF6;
  --ok:#0E7C5A;

  --disp:'Fraunces',Georgia,'Times New Roman',serif;
  --text:'Karla',system-ui,-apple-system,'Segoe UI',sans-serif;

  --measure:36rem;
  --shell:78rem;
  --rail:13rem;
  --gut:clamp(20px,5vw,64px);
  --hh:68px;

  --r:10px;
  --r-lg:20px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-soft:cubic-bezier(.33,.06,.2,1);
}

/* ----------------------------------------------------------------- 3 base */
*,*::before,*::after{ box-sizing:border-box; }
/* a display value on a component would otherwise win against the hidden
   attribute, which is how a "save choice" button ends up visible before the
   panel it belongs to is open */
[hidden]{ display:none !important; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--text); font-size:17px; line-height:1.72;
  font-synthesis-weight:none;
  overflow-x:clip;
}
img{ max-width:100%; height:auto; display:block; }
a{ color:var(--indigo); text-underline-offset:.22em; text-decoration-thickness:1px; }
a:hover{ color:var(--blue); }
button{ font:inherit; color:inherit; cursor:pointer; }
h1,h2,h3,h4{ font-family:var(--disp); font-weight:600; line-height:1.1;
  letter-spacing:-.018em; margin:0 0 .5em; font-variation-settings:'SOFT' 0,'WONK' 0; }
h1{ font-size:clamp(2.35rem,6.2vw,4.5rem); line-height:1.02; letter-spacing:-.03em; }
h2{ font-size:clamp(1.8rem,3.6vw,2.9rem); }
h3{ font-size:clamp(1.35rem,2.3vw,1.85rem); }
h4{ font-size:1.12rem; }
p{ margin:0 0 1.15em; }
:focus-visible{ outline:2.5px solid var(--blue); outline-offset:3px; border-radius:3px; }
.skip{ position:absolute; inset-inline-start:-9999px; top:0; z-index:200;
  background:var(--indigo); color:#fff; padding:12px 20px; border-radius:0 0 var(--r) 0; }
.skip:focus{ inset-inline-start:0; }

.shell{ width:min(100% - var(--gut)*2, var(--shell)); margin-inline:auto; }
.measure{ max-width:var(--measure); }
.eyebrow{ font-family:var(--text); font-size:.72rem; font-weight:700;
  letter-spacing:.17em; text-transform:uppercase; color:var(--indigo);
  display:flex; align-items:center; gap:.7em; margin:0 0 1.1em; }
.eyebrow::before{ content:''; width:26px; height:2px; background:var(--aqua); flex:none; }
.lede{ font-size:clamp(1.08rem,1.9vw,1.32rem); line-height:1.6; color:var(--ink-2); }
.num{ font-variant-numeric:tabular-nums lining-nums; }

.btn{ display:inline-flex; align-items:center; justify-content:center; gap:.55em;
  padding:.82em 1.5em; border-radius:999px; border:1.6px solid transparent;
  font-weight:600; font-size:.96rem; text-decoration:none; letter-spacing:.005em;
  transition:background .22s var(--ease), color .22s var(--ease),
             border-color .22s var(--ease), transform .22s var(--ease); }
.btn:active{ transform:translateY(1px); }
.b-fill{ background:var(--indigo); color:#fff; }
.b-fill:hover{ background:var(--indigo-d); color:#fff; }
.b-line{ border-color:var(--rule); background:var(--card); color:var(--ink); }
.b-line:hover{ border-color:var(--indigo); color:var(--indigo); }
.b-ghost{ border-color:rgba(255,255,255,.4); color:#fff; }
.b-ghost:hover{ background:rgba(255,255,255,.12); color:#fff; }
.b-sm{ padding:.6em 1.1em; font-size:.87rem; }
.row{ display:flex; flex-wrap:wrap; gap:12px; }

/* --------------------------------------------------------------- 4 header */
.prog{ position:fixed; inset-block-start:0; inset-inline:0; height:3px; z-index:90;
  background:transparent; pointer-events:none; }
.prog i{ display:block; height:100%; width:0;
  background:linear-gradient(90deg,var(--indigo),var(--blue) 60%,var(--aqua));
  transition:width .12s linear; }

.hdr{ position:sticky; inset-block-start:0; z-index:80; background:rgba(247,249,252,.88);
  backdrop-filter:blur(12px); border-block-end:1px solid var(--rule-soft); }
.hdr-in{ height:var(--hh); display:flex; align-items:center; justify-content:space-between; gap:20px; }
.brand{ display:inline-flex; align-items:center; gap:10px; text-decoration:none; color:var(--ink); flex:none; }
.brand svg{ width:26px; height:26px; flex:none; }
.brand b{ font-family:var(--disp); font-weight:600; font-size:1.18rem; letter-spacing:-.02em; }
.brand s{ text-decoration:none; font-size:.63rem; font-weight:700; letter-spacing:.14em;
  text-transform:uppercase; color:var(--mute); }
.nav{ display:flex; align-items:center; gap:26px; }
.nav a{ text-decoration:none; color:var(--ink-2); font-size:.93rem; font-weight:500;
  position:relative; padding-block:6px; }
.nav a::after{ content:''; position:absolute; inset-block-end:0; inset-inline-start:0;
  width:100%; height:1.5px; background:var(--indigo); transform:scaleX(0);
  transform-origin:left; transition:transform .28s var(--ease); }
.nav a:hover::after,.nav a[aria-current]::after{ transform:scaleX(1); }
.nav a[aria-current]{ color:var(--indigo); }
.hdr-act{ display:flex; align-items:center; gap:12px; flex:none; }
.lang{ font-size:.8rem; font-weight:700; letter-spacing:.06em; text-decoration:none;
  color:var(--ink-2); border:1.4px solid var(--rule); border-radius:999px; padding:.42em .85em; }
.lang:hover{ border-color:var(--indigo); color:var(--indigo); }
.burger{ display:none; width:42px; height:42px; border:1.4px solid var(--rule);
  background:var(--card); border-radius:50%; position:relative; }
.burger i{ position:absolute; inset-inline:11px; height:1.6px; background:var(--ink);
  transition:transform .3s var(--ease), opacity .2s; }
.burger i:nth-child(1){ top:17px; } .burger i:nth-child(2){ top:23px; }
.burger[aria-expanded=true] i:nth-child(1){ transform:translateY(3px) rotate(45deg); }
.burger[aria-expanded=true] i:nth-child(2){ transform:translateY(-3px) rotate(-45deg); }

.sheet{ position:fixed; inset:var(--hh) 0 auto; z-index:79; background:var(--card);
  border-block-end:1px solid var(--rule); padding:10px var(--gut) 26px;
  transform:translateY(-102%); transition:transform .42s var(--ease); }
.sheet.open{ transform:none; }
.sheet a{ display:block; font-family:var(--disp); font-size:1.5rem; font-weight:600;
  text-decoration:none; color:var(--ink); padding:13px 0; border-block-end:1px solid var(--rule-soft); }
.sheet .btn{ margin-block-start:20px; width:100%; }

/* ----------------------------------------------------------------- 5 hero */
.hero{ padding-block:clamp(48px,7vw,92px) clamp(36px,5vw,64px); position:relative; }
.hero-grid{ display:grid; grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:clamp(28px,5vw,68px); align-items:end; }
.hero h1{ margin-block-end:.42em; }
.hero .lede{ max-width:32rem; }
.hero-note{ margin-block-start:26px; padding-inline-start:16px;
  border-inline-start:2.5px solid var(--aqua); font-size:.9rem; color:var(--mute); line-height:1.55; }
.hero-act{ margin-block-start:30px; }
.hero-fig{ position:relative; border-radius:var(--r-lg); overflow:hidden;
  aspect-ratio:4/3.1; background:var(--paper-2); }
.hero-fig img{ width:100%; height:100%; object-fit:cover; }
.hero-fig::after{ content:''; position:absolute; inset:0;
  background:linear-gradient(200deg,rgba(31,47,152,.16),transparent 58%); }

.crumb{ font-size:.8rem; color:var(--mute); margin-block-end:18px; letter-spacing:.02em; }
.crumb a{ color:var(--mute); text-decoration:none; }
.crumb a:hover{ color:var(--indigo); }

.page-head{ padding-block:clamp(38px,5.5vw,72px) clamp(24px,3vw,40px); }
.page-head h1{ font-size:clamp(2.1rem,5vw,3.6rem); }

/* ------------------------------------------------------------- 6 sections */
.sec{ padding-block:clamp(52px,7.5vw,104px); }
.sec-sm{ padding-block:clamp(34px,4.5vw,58px); }
.band{ background:var(--paper-2); }
.ink{ background:var(--ink); color:#fff; }
.ink h2,.ink h3{ color:#fff; }
.ink .eyebrow{ color:var(--aqua); }
.ink .lede{ color:rgba(255,255,255,.76); }
.ink a{ color:var(--aqua); }

.s-head{ display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(20px,4vw,56px); align-items:end; margin-block-end:clamp(30px,4vw,54px); }
.s-head > p{ margin:0; }

.grid-3{ display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:clamp(18px,2.4vw,30px); }
.grid-2{ display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:clamp(18px,2.4vw,30px); }
.grid-4{ display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:clamp(16px,2vw,24px); }

/* Numbered principle blocks on the home page. The rule above each one draws
   itself in when the block arrives. */
.pri{ padding-block-start:22px; border-block-start:1.5px solid var(--rule); position:relative; }
.pri::before{ content:''; position:absolute; inset-block-start:-1.5px; inset-inline-start:0;
  width:100%; height:1.5px; background:var(--indigo); transform:scaleX(0); transform-origin:left;
  transition:transform .9s var(--ease-soft); }
.pri.in::before{ transform:scaleX(1); }
.pri h3{ font-size:1.22rem; margin-block-end:.55em; }
.pri p{ margin:0; color:var(--ink-2); font-size:.97rem; }
.pri i{ font-style:normal; font-family:var(--disp); font-size:.82rem; font-weight:700;
  color:var(--blue); letter-spacing:.1em; display:block; margin-block-end:14px; }

/* ---------------------------------------------------------------- 7 guide */
.g-wrap{ display:grid; grid-template-columns:var(--rail) minmax(0,1fr); gap:clamp(26px,4vw,64px);
  align-items:start; }
/* a grid item's automatic minimum is its min-content width, so without this a
   single wide descendant stretches the whole column past the viewport and the
   inner scrollers never get the chance to do their job */
.g-wrap > *{ min-width:0; }
.toc{ position:sticky; inset-block-start:calc(var(--hh) + 26px); font-size:.87rem; }
.toc h4{ font-family:var(--text); font-size:.7rem; font-weight:700; letter-spacing:.15em;
  text-transform:uppercase; color:var(--mute); margin:0 0 14px; }
.toc ol{ list-style:none; margin:0; padding:0; counter-reset:toc; }
.toc li{ counter-increment:toc; }
.toc a{ display:grid; grid-template-columns:1.9em 1fr; gap:.3em; text-decoration:none;
  color:var(--ink-2); padding:7px 0; line-height:1.35; border-block-end:1px solid var(--rule-soft);
  transition:color .22s; }
.toc a::before{ content:counter(toc,decimal-leading-zero); font-family:var(--disp);
  font-weight:700; color:var(--mute); font-size:.78rem; }
.toc a:hover{ color:var(--indigo); }
.toc a.on{ color:var(--indigo); font-weight:600; }
.toc a.on::before{ color:var(--blue); }
.toc-note{ margin-block-start:16px; font-size:.8rem; color:var(--mute); line-height:1.5; }

.chap{ padding-block-end:clamp(40px,6vw,76px); scroll-margin-top:calc(var(--hh) + 20px); }
.chap + .chap{ padding-block-start:clamp(34px,5vw,64px); border-block-start:1px solid var(--rule); }
.chap-n{ font-family:var(--disp); font-size:clamp(2.6rem,6vw,4.4rem); font-weight:700;
  line-height:.9; color:transparent; -webkit-text-stroke:1.4px var(--rule);
  letter-spacing:-.04em; display:block; margin-block-end:8px;
  transition:color .7s var(--ease-soft), -webkit-text-stroke-color .7s var(--ease-soft); }
.chap.in .chap-n{ color:rgba(31,47,152,.09); -webkit-text-stroke-color:rgba(31,47,152,.28); }
.chap h2{ margin-block-end:.4em; }
.chap .dek{ font-size:clamp(1.05rem,1.7vw,1.24rem); color:var(--indigo); line-height:1.5;
  font-family:var(--disp); font-weight:400; font-style:italic; margin-block-end:1.4em;
  max-width:34rem; }
.chap p,.chap ul{ max-width:var(--measure); }
.chap h3{ font-size:1.3rem; margin-block:1.7em .55em; }
.chap ul{ padding-inline-start:0; list-style:none; margin:0 0 1.3em; }
.chap ul li{ position:relative; padding-inline-start:1.3em; margin-block-end:.6em; }
.chap ul li::before{ content:''; position:absolute; inset-inline-start:0; inset-block-start:.72em;
  width:7px; height:1.8px; background:var(--blue); }

.pull{ font-family:var(--disp); font-size:clamp(1.25rem,2.4vw,1.72rem); line-height:1.32;
  font-weight:600; letter-spacing:-.02em; color:var(--indigo);
  margin-block:1.7em; padding-inline-start:clamp(16px,2vw,26px);
  border-inline-start:3px solid var(--aqua); max-width:33rem; }

.note{ background:var(--card); border:1px solid var(--rule); border-radius:var(--r);
  padding:clamp(18px,2.4vw,26px); margin-block:1.7em; max-width:var(--measure); }
.note h4{ font-family:var(--text); font-size:.72rem; font-weight:700; letter-spacing:.14em;
  text-transform:uppercase; color:var(--indigo); margin:0 0 .7em; }
.note p{ margin:0; font-size:.95rem; color:var(--ink-2); }

.chap-fig{ margin-block:2em; border-radius:var(--r-lg); overflow:hidden; background:var(--paper-2); }
.chap-fig img{ width:100%; aspect-ratio:16/9; object-fit:cover; }

/* The seven-point warning grid. Deliberately the most prominent block in the
   guide, because it is the part a reader can act on. */
.checks{ display:grid; gap:2px; background:var(--rule); border:1px solid var(--rule);
  border-radius:var(--r); overflow:hidden; margin-block:1.8em; }
.check{ background:var(--card); padding:clamp(16px,2.2vw,22px); display:grid;
  grid-template-columns:2.1rem minmax(0,1fr); gap:.2em 1em; align-items:start; }
.check b{ grid-column:2; font-size:1rem; line-height:1.4; }
.check span{ grid-column:2; font-size:.93rem; color:var(--ink-2); line-height:1.6; }
.check em{ grid-row:span 2; font-style:normal; font-family:var(--disp); font-weight:700;
  font-size:1.05rem; color:var(--blue); line-height:1.4; }

/* -------------------------------------------------------------- 8 figures */
.tbl{ margin-block:1.8em; }
.tbl-cap{ font-size:.86rem; color:var(--mute); margin-block-end:.8em; line-height:1.5; }
.tbl-scroll{ overflow-x:auto; border:1px solid var(--rule); border-radius:var(--r);
  background:var(--card); }
table{ border-collapse:collapse; width:100%; font-size:.93rem; min-width:26rem; }
th,td{ text-align:start; padding:.78em 1em; border-block-end:1px solid var(--rule-soft); }
thead th{ font-family:var(--text); font-size:.72rem; font-weight:700; letter-spacing:.1em;
  text-transform:uppercase; color:var(--mute); background:var(--paper-2);
  border-block-end:1px solid var(--rule); white-space:nowrap; }
tbody tr:last-child td{ border-block-end:none; }
td.num,th.num{ font-variant-numeric:tabular-nums; }
.tbl-foot{ font-size:.83rem; color:var(--mute); margin-block-start:.8em; line-height:1.55; }

.curve{ margin-block:2em; background:var(--card); border:1px solid var(--rule);
  border-radius:var(--r); padding:clamp(18px,2.4vw,26px); }
.curve h4{ font-family:var(--text); font-size:.72rem; font-weight:700; letter-spacing:.14em;
  text-transform:uppercase; color:var(--indigo); margin:0 0 1em; }
.curve svg{ width:100%; height:auto; display:block; overflow:visible; }
.curve .axis{ stroke:var(--rule); stroke-width:1; }
.curve .gridline{ stroke:var(--rule-soft); stroke-width:1; }
.curve .lbl{ font-family:var(--text); font-size:9.5px; fill:var(--mute); }
.curve .ln{ fill:none; stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round;
  stroke-dasharray:var(--len); stroke-dashoffset:var(--len);
  transition:stroke-dashoffset 1.7s var(--ease-soft); }
.curve.in .ln{ stroke-dashoffset:0; }
.curve .ln-c{ stroke:var(--indigo); }
.curve .ln-s{ stroke:var(--blue); stroke-dasharray:var(--len); opacity:.55; }
.curve.in .ln-s{ transition-delay:.25s; }
.curve-key{ display:flex; flex-wrap:wrap; gap:18px; margin-block-start:14px; font-size:.85rem; }
.curve-key span{ display:inline-flex; align-items:center; gap:.5em; color:var(--ink-2); }
.curve-key i{ width:18px; height:2.6px; border-radius:2px; display:inline-block; }
.curve-note{ font-size:.8rem; color:var(--mute); margin-block-start:10px; line-height:1.5; }

/* ---------------------------------------------------------------- 9 cards */
.card{ background:var(--card); border:1px solid var(--rule); border-radius:var(--r-lg);
  padding:clamp(20px,2.6vw,30px); display:flex; flex-direction:column; gap:12px; }
.card h3{ margin:0; }
.card p{ margin:0; color:var(--ink-2); font-size:.96rem; }

.course{ background:var(--card); border:1px solid var(--rule); border-radius:var(--r-lg);
  padding:clamp(22px,3vw,34px); scroll-margin-top:calc(var(--hh) + 20px); }
.course + .course{ margin-block-start:clamp(16px,2vw,22px); }
.course-hd{ display:grid; grid-template-columns:minmax(0,1fr) auto; gap:20px; align-items:start;
  margin-block-end:22px; }
.course-n{ font-family:var(--disp); font-size:.8rem; font-weight:700; letter-spacing:.14em;
  color:var(--blue); display:block; margin-block-end:10px; }
.course h3{ margin-block-end:.35em; }
.course-lead{ color:var(--ink-2); margin:0; max-width:34rem; }
.course-meta{ text-align:end; flex:none; }
.course-meta b{ font-family:var(--disp); font-size:clamp(1.7rem,3vw,2.3rem); font-weight:700;
  line-height:1; color:var(--indigo); display:block; letter-spacing:-.03em; }
.course-meta span{ font-size:.8rem; color:var(--mute); display:block; }
.course-body{ display:grid; grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,2.6vw,32px); padding-block-start:22px; border-block-start:1px solid var(--rule-soft); }
.course-body h4{ font-family:var(--text); font-size:.71rem; font-weight:700; letter-spacing:.13em;
  text-transform:uppercase; color:var(--mute); margin:0 0 .8em; }
.course-body ul{ list-style:none; margin:0; padding:0; }
.course-body li{ position:relative; padding-inline-start:1.05em; margin-block-end:.5em;
  font-size:.93rem; color:var(--ink-2); line-height:1.55; }
.course-body li::before{ content:''; position:absolute; inset-inline-start:0; inset-block-start:.68em;
  width:5px; height:5px; border-radius:50%; background:var(--aqua); }
.course-body p{ font-size:.93rem; color:var(--ink-2); margin:0; }

.step{ position:relative; padding-block-start:20px; border-block-start:1.5px solid var(--rule); }
.step b{ font-family:var(--disp); font-size:.8rem; font-weight:700; color:var(--blue);
  letter-spacing:.12em; display:block; margin-block-end:12px; }
.step h4{ font-size:1.06rem; margin-block-end:.45em; }
.step p{ font-size:.92rem; color:var(--ink-2); margin:0; }

.qa{ border-block-start:1px solid var(--rule); }
.qa-i{ border-block-end:1px solid var(--rule); }
.qa-q{ width:100%; background:none; border:0; text-align:start; padding:1.15em 2.4em 1.15em 0;
  font-family:var(--disp); font-size:1.08rem; font-weight:600; line-height:1.35;
  position:relative; color:var(--ink); }
.qa-x{ position:absolute; inset-inline-end:2px; inset-block-start:1.45em; width:13px; height:13px; }
.qa-x::before,.qa-x::after{ content:''; position:absolute; background:var(--indigo);
  inset-inline-start:0; inset-block-start:5.6px; width:13px; height:1.8px;
  transition:transform .32s var(--ease); }
.qa-x::after{ transform:rotate(90deg); }
.qa-i.open .qa-x::after{ transform:rotate(0); }
.qa-a{ display:grid; grid-template-rows:0fr; transition:grid-template-rows .38s var(--ease); }
.qa-i.open .qa-a{ grid-template-rows:1fr; }
.qa-a > div{ overflow:hidden; }
.qa-a p{ margin:0 0 1.3em; color:var(--ink-2); max-width:var(--measure); font-size:.97rem; }

/* The scope declaration. Numbered, on the dark band, deliberately unmissable. */
.scope{ display:grid; gap:0; counter-reset:sc; }
.scope li{ counter-increment:sc; list-style:none; display:grid;
  grid-template-columns:2.6rem minmax(0,1fr); gap:1em; padding-block:1.05em;
  border-block-end:1px solid rgba(255,255,255,.13); align-items:start; }
.scope li:last-child{ border-block-end:none; }
.scope li::before{ content:counter(sc,decimal-leading-zero); font-family:var(--disp);
  font-weight:700; font-size:.92rem; color:var(--aqua); padding-block-start:.25em; }
.scope li span{ line-height:1.6; color:rgba(255,255,255,.88); }

.kv{ display:grid; grid-template-columns:auto minmax(0,1fr); gap:.55em 1.6em;
  font-size:.94rem; align-items:baseline; }
.kv dt{ color:var(--mute); }
.kv dd{ margin:0; font-weight:600; }
.hours{ display:grid; grid-template-columns:auto auto; gap:.4em 1.8em;
  font-size:.94rem; justify-content:start; }
.hours span:nth-child(even){ font-variant-numeric:tabular-nums; font-weight:600; }
.hours .cl{ color:var(--mute); font-weight:400; }

.cta{ background:var(--indigo); color:#fff; border-radius:var(--r-lg);
  padding:clamp(30px,5vw,58px); text-align:center; }
.cta h2{ color:#fff; margin-block-end:.4em; }
.cta p{ color:rgba(255,255,255,.8); max-width:34rem; margin-inline:auto; }
.cta .row{ justify-content:center; margin-block-start:26px; }

/* ---------------------------------------------------------------- 10 form */
.form{ background:var(--card); border:1px solid var(--rule); border-radius:var(--r-lg);
  padding:clamp(22px,3.4vw,38px); }
.fields{ display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px 20px; }
.fld{ display:flex; flex-direction:column; gap:7px; }
.fld.wide{ grid-column:1 / -1; }
.fld label{ font-size:.83rem; font-weight:600; color:var(--ink-2); }
.fld label i{ font-style:normal; color:var(--mute); font-weight:400; }
.fld input,.fld select,.fld textarea{ font:inherit; font-size:.96rem; color:var(--ink);
  background:var(--paper); border:1.5px solid var(--rule); border-radius:var(--r);
  padding:.72em .9em; width:100%; transition:border-color .2s, background .2s; }
.fld textarea{ min-height:6.5em; resize:vertical; }
.fld input:focus,.fld select:focus,.fld textarea:focus{ background:var(--card); border-color:var(--indigo); }
.fld.bad input,.fld.bad select,.fld.bad textarea{ border-color:#C0392B; }
.err{ font-size:.82rem; color:#C0392B; min-height:1.15em; }
.consent{ grid-column:1 / -1; display:grid; grid-template-columns:auto minmax(0,1fr);
  gap:.75em; align-items:start; font-size:.9rem; color:var(--ink-2); line-height:1.55; }
.consent input{ width:19px; height:19px; margin-block-start:.2em; accent-color:var(--indigo); }
.form-foot{ margin-block-start:20px; display:flex; flex-wrap:wrap; gap:16px;
  align-items:center; justify-content:space-between; }
.form-note{ font-size:.84rem; color:var(--mute); max-width:26rem; line-height:1.5; margin:0; }
.fallback{ margin-block-start:20px; padding:16px; background:var(--paper-2);
  border-radius:var(--r); font-size:.9rem; }
.fallback textarea{ width:100%; min-height:9em; margin-block-start:10px; font-family:inherit;
  font-size:.88rem; border:1px solid var(--rule); border-radius:var(--r); padding:.7em; }

/* -------------------------------------------------------------- 11 footer */
.ftr{ background:var(--ink); color:rgba(255,255,255,.72); padding-block:clamp(44px,6vw,76px) 30px;
  font-size:.91rem; }
.ftr a{ color:rgba(255,255,255,.8); text-decoration:none; }
.ftr a:hover{ color:var(--aqua); }
.ftr h4{ font-family:var(--text); font-size:.71rem; font-weight:700; letter-spacing:.14em;
  text-transform:uppercase; color:rgba(255,255,255,.5); margin:0 0 1.1em; }
.ftr-top{ display:grid; grid-template-columns:1.5fr 1fr 1fr 1.3fr; gap:clamp(24px,3.5vw,44px);
  padding-block-end:34px; border-block-end:1px solid rgba(255,255,255,.13); }
.ftr ul{ list-style:none; margin:0; padding:0; display:grid; gap:.6em; }
.ftr .brand b,.ftr .brand{ color:#fff; }
.ftr .brand s{ color:rgba(255,255,255,.5); }
.ftr-blurb{ margin-block-start:16px; font-size:.88rem; line-height:1.6; max-width:24rem; }
.lnk{ background:none; border:0; padding:0; color:rgba(255,255,255,.8);
  text-decoration:underline; text-underline-offset:.2em; font-size:inherit; }
.lnk:hover{ color:var(--aqua); }
.imprint{ padding-block:26px; border-block-end:1px solid rgba(255,255,255,.13);
  font-size:.83rem; line-height:1.75; color:rgba(255,255,255,.62); }
.imprint b{ color:rgba(255,255,255,.88); font-weight:600; }
.ftr-btm{ padding-block-start:22px; display:flex; flex-wrap:wrap; gap:14px;
  justify-content:space-between; font-size:.82rem; color:rgba(255,255,255,.5); }
.disc{ background:var(--paper-2); border-block:1px solid var(--rule); }
.disc p{ margin:0; padding-block:16px; font-size:.86rem; color:var(--ink-2); line-height:1.6; }
.disc b{ color:var(--indigo); }

/* ------------------------------------------------------------- 12 dialogs */
.ask{ position:fixed; z-index:95; inset-block-end:18px; inset-inline-end:18px;
  width:min(360px, calc(100vw - 36px));
  background:var(--card); border:1px solid var(--rule); border-radius:var(--r-lg);
  box-shadow:0 18px 50px rgba(11,21,51,.18); padding:22px 22px 20px;
  opacity:0; transform:translateY(14px) scale(.98); pointer-events:none;
  transition:opacity .38s var(--ease), transform .38s var(--ease); }
.ask.show{ opacity:1; transform:none; pointer-events:auto; }
.ask h3{ font-size:1.22rem; margin-block-end:.4em; padding-inline-end:1.5em; }
.ask p{ font-size:.92rem; color:var(--ink-2); margin-block-end:1.1em; }
.ask .row{ gap:10px; }
.ask .btn{ flex:1 1 auto; }
.ask-x{ position:absolute; inset-block-start:12px; inset-inline-end:12px; width:30px; height:30px;
  border:0; background:none; border-radius:50%; color:var(--mute); }
.ask-x:hover{ background:var(--paper-2); color:var(--ink); }
.ask-x::before,.ask-x::after{ content:''; position:absolute; inset-block-start:14px;
  inset-inline-start:8px; width:14px; height:1.6px; background:currentColor; }
.ask-x::before{ transform:rotate(45deg); } .ask-x::after{ transform:rotate(-45deg); }

.ck{ position:fixed; z-index:96; inset-block-end:0; inset-inline:0;
  background:var(--card); border-block-start:1px solid var(--rule);
  box-shadow:0 -10px 40px rgba(11,21,51,.1);
  transform:translateY(102%); transition:transform .44s var(--ease); }
.ck.show{ transform:none; }
.ck-in{ padding-block:20px 22px; display:grid; grid-template-columns:minmax(0,1fr) auto;
  gap:20px 30px; align-items:center; }
.ck h4{ font-family:var(--disp); font-size:1.12rem; font-weight:600; margin:0 0 .35em; color:var(--ink); }
.ck p{ margin:0; font-size:.88rem; color:var(--ink-2); max-width:44rem; line-height:1.55; }
.ck .row{ flex:none; }
.ck-opts{ grid-column:1 / -1; display:none; gap:20px; flex-wrap:wrap;
  padding-block-start:16px; border-block-start:1px solid var(--rule-soft); }
.ck.x .ck-opts{ display:flex; }
.ck-opts label{ display:inline-flex; align-items:center; gap:.55em; font-size:.88rem; color:var(--ink-2); }
.ck-opts input{ width:17px; height:17px; accent-color:var(--indigo); }
.ck-opts .fix{ color:var(--mute); }

.install{ display:none; }
.install.on{ display:inline-flex; }

/* --------------------------------------------------------------- 13 motion
   One reveal class does the work. The blur is what makes it read as print
   settling rather than as a web animation. */
.up{ opacity:0; transform:translateY(18px); filter:blur(4px);
  transition:opacity .7s var(--ease-soft), transform .7s var(--ease-soft), filter .7s var(--ease-soft); }
.up.in{ opacity:1; transform:none; filter:none; }
.stg > *{ opacity:0; transform:translateY(16px);
  transition:opacity .62s var(--ease-soft), transform .62s var(--ease-soft); }
.stg.in > *{ opacity:1; transform:none; }
.stg.in > *:nth-child(2){ transition-delay:.08s; }
.stg.in > *:nth-child(3){ transition-delay:.16s; }
.stg.in > *:nth-child(4){ transition-delay:.24s; }
.stg.in > *:nth-child(5){ transition-delay:.32s; }
.stg.in > *:nth-child(6){ transition-delay:.40s; }
.stg.in > *:nth-child(7){ transition-delay:.48s; }

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
  .up,.stg > *,.pri::before,.curve .ln{ opacity:1 !important; transform:none !important;
    filter:none !important; stroke-dashoffset:0 !important; }
}

/* ---------------------------------------------------------------- 14 print
   The guide is the thing people print, so it is laid out for paper: the rail,
   the header, the dialogs and every control disappear, and links show their
   destination. */
@media print{
  .hdr,.sheet,.prog,.ask,.ck,.ftr .row,.burger,.hero-act,.cta,.install{ display:none !important; }
  body{ background:#fff; color:#000; font-size:11pt; line-height:1.5; }
  .g-wrap{ display:block; }
  .toc{ position:static; page-break-after:always; }
  .sec,.hero{ padding-block:0 18pt; }
  .chap{ page-break-inside:auto; padding-block-end:18pt; }
  .chap h2,.chap h3{ page-break-after:avoid; }
  .note,.curve,.checks,.tbl,.chap-fig{ page-break-inside:avoid; }
  .chap-fig{ max-height:70mm; }
  .up,.stg > *{ opacity:1 !important; transform:none !important; filter:none !important; }
  .chap-n{ color:#666 !important; -webkit-text-stroke:0 !important; font-size:18pt; }
  a[href^="http"]::after{ content:' (' attr(href) ')'; font-size:8.5pt; color:#555; word-break:break-all; }
  .ftr{ background:none; color:#000; border-block-start:1px solid #999; }
  .ftr a,.ftr h4,.imprint{ color:#000; }
}

/* -------------------------------------------------------- 15 narrow screens */
@media (max-width:1180px){
  :root{ --rail:11rem; }
  .brand s{ display:none; }
}
@media (max-width:980px){
  .nav{ display:none; }
  .burger{ display:block; }
  /* the sheet already carries this call to action, and leaving it in the bar
     pushes the burger off the edge on a phone */
  .hdr-act > .btn{ display:none; }
  .hero-grid{ grid-template-columns:1fr; align-items:start; }
  .hero-fig{ aspect-ratio:16/10; }
  .g-wrap{ grid-template-columns:1fr; }
  .toc{ position:static; border:1px solid var(--rule); border-radius:var(--r);
    background:var(--card); padding:18px 20px; margin-block-end:34px; }
  .s-head{ grid-template-columns:1fr; align-items:start; }
  .grid-3,.grid-4{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .course-body{ grid-template-columns:1fr; }
  .ftr-top{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media (max-width:720px){
  body{ font-size:16.5px; }
  .grid-2,.grid-3,.grid-4{ grid-template-columns:1fr; }
  .fields{ grid-template-columns:1fr; }
  .course-hd{ grid-template-columns:1fr; }
  .course-meta{ text-align:start; display:flex; align-items:baseline; gap:.5em; }
  .course-meta b{ font-size:1.5rem; }
  .ck-in{ grid-template-columns:1fr; }
  .ck .row .btn{ flex:1 1 auto; }
  .ask{ inset-inline:12px; inset-block-end:12px; width:auto; }
}
@media (max-width:430px){
  /* 320px leaves 280px of content once the gutters are taken, which the
     wordmark, the language pill and the burger do not fit into at full size */
  .hdr-in{ gap:10px; }
  .brand{ gap:8px; }
  .brand svg{ width:23px; height:23px; }
  .brand b{ font-size:1rem; }
  .hdr-act{ gap:8px; }
  .lang{ font-size:.74rem; padding:.38em .62em; }
  .burger{ width:38px; height:38px; }
  .burger i{ inset-inline:10px; }
  .burger i:nth-child(1){ top:15px; } .burger i:nth-child(2){ top:21px; }
  .btn{ white-space:normal; text-align:center; line-height:1.3; }
  .hero-act .btn,.cta .row .btn{ flex:1 1 100%; }
  .ftr-top{ grid-template-columns:1fr; }
  .check{ grid-template-columns:1fr; }
  .check em{ grid-row:auto; grid-column:1; margin-block-end:.2em; }
  .check b,.check span{ grid-column:1; }
  .scope li{ grid-template-columns:1.9rem minmax(0,1fr); gap:.7em; }
}