/* directmotion.com (Fable version). The current site's scheme: DM logo blue, dark header, white page. */
:root {
  --paper: #ffffff;
  --card: #f5f6f8;
  --band: #efefef;
  --ink: #212529;
  --ink-2: #566069;
  --rule: #d8dce1;
  --accent: #0656a4;        /* the blue of the DM logo */
  --accent-ink: #ffffff;
  --accent-soft: #e8f0fa;
  --head: #212529;          /* the dark navbar of the current site */
  --head-ink: #f3f5f7;
  --head-ink-2: #b7bec6;
  --warn: #fff3bf;
  --warn-rule: #e3b600;
  --code-bg: #1b2229;
  --code-ink: #e6edf3;
  --max: 72rem;
  --text: 46rem;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #121820; --card: #192230; --band: #161e28; --ink: #e8edf2; --ink-2: #a9b4c0; --rule: #2d3947;
    --accent: #6aa5ff; --accent-ink: #0b1420; --accent-soft: #1c2b42; --head: #0b1119; --head-ink: #e8edf2; --head-ink-2: #a9b4c0;
    --warn: #3a3113; --warn-rule: #c9a400; --code-bg: #0b1119; --code-ink: #e6edf3;
  }
}
:root[data-theme="dark"] {
  --paper: #121820; --card: #192230; --band: #161e28; --ink: #e8edf2; --ink-2: #a9b4c0; --rule: #2d3947;
  --accent: #6aa5ff; --accent-ink: #0b1420; --accent-soft: #1c2b42; --head: #0b1119; --head-ink: #e8edf2; --head-ink-2: #a9b4c0;
  --warn: #3a3113; --warn-rule: #c9a400; --code-bg: #0b1119; --code-ink: #e6edf3;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--sans); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
.muted { color: var(--ink-2); }
.small { font-size: .9rem; margin-top: .6rem; }
img { max-width: 100%; height: auto; }

/* header */
.preview-banner { background: var(--warn); border-bottom: 1px solid var(--warn-rule); color: var(--ink); font-size: .9rem; text-align: center; padding: .4rem 16px; }
.preview-banner a { color: var(--accent); text-decoration: underline; }
.top { background: var(--head); color: var(--head-ink); position: sticky; top: 0; z-index: 5; }
.bar { display: flex; align-items: center; gap: 1.5rem; min-height: 3.8rem; flex-wrap: wrap; }
.brand { color: var(--head-ink); font-weight: 600; font-size: 1.05rem; display: inline-flex; align-items: center; gap: .6rem; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.logo { width: 2.25rem; height: 2.25rem; display: block; }
.nav { display: flex; gap: .15rem 1rem; flex-wrap: wrap; font-size: .95rem; margin-left: auto; }
.nav a { color: var(--head-ink-2); padding: .3rem 0; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--head-ink); text-decoration: none; }
.nav a[aria-current] { color: var(--head-ink); border-bottom-color: #6aa5ff; }

/* main */
main { padding: 2.2rem 16px 4rem; }
main.narrow { max-width: calc(var(--text) + 32px); }
main.wide { max-width: var(--max); }
.agents { font-size: .82rem; color: var(--ink-2); margin: 0 0 1.4rem; padding-left: .7rem; border-left: 3px solid var(--accent-soft); }
h1 { font-size: clamp(1.9rem, 4.2vw, 2.9rem); line-height: 1.12; letter-spacing: -.015em; margin: 0 0 1rem; font-weight: 600; }
h2 { font-size: 1.45rem; margin: 2.6rem 0 .8rem; line-height: 1.25; font-weight: 600; }
h3 { font-size: 1.1rem; margin: 1.8rem 0 .5rem; font-weight: 600; }
h1 + p, .lede { font-size: 1.15rem; color: var(--ink-2); }
p, ul, ol { margin: 0 0 1rem; }
li { margin: .25rem 0; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
blockquote { margin: 1.2rem 0; padding: .2rem 1.1rem; border-left: 3px solid var(--accent); color: var(--ink-2); }
code, pre { font-family: var(--mono); font-size: .9em; }
code { background: var(--accent-soft); padding: .1em .35em; border-radius: .25rem; }
pre { background: var(--code-bg); color: var(--code-ink); padding: 1rem 1.1rem; border-radius: .5rem; overflow-x: auto; line-height: 1.5; margin: 1rem 0 1.4rem; }
pre code { background: none; padding: 0; color: inherit; font-size: .88rem; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0 1.6rem; font-size: .95rem; display: block; overflow-x: auto; }
th, td { text-align: left; vertical-align: top; padding: .55rem .7rem; border-bottom: 1px solid var(--rule); }
th { font-weight: 600; color: var(--ink-2); font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; }
td:first-child { font-weight: 500; }

/* pictures */
figure { margin: 1.6rem 0 2rem; }
figure img { display: block; width: 100%; border-radius: .5rem; border: 1px solid var(--rule); background: #fff; }
figcaption { font-size: .85rem; color: var(--ink-2); margin-top: .5rem; }
.figs { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: 1.2rem; margin: 1.6rem 0 2rem; }
.figs figure { margin: 0; }
.hero-img { margin: .5rem 0 2rem; }
.hero-img img { border: 0; border-radius: .6rem; }
.diagram { margin: 1.6rem 0 2rem; }
.diagram svg { width: 100%; height: auto; display: block; font-family: var(--sans); }

/* building blocks used inside content */
.hero { padding: 1rem 0 1.5rem; }
.hero h1 { font-size: clamp(2.2rem, 5.2vw, 3.6rem); max-width: 32ch; }
.hero .lede { max-width: 58ch; }
.equation { font-family: var(--mono); font-size: clamp(1rem, 2.4vw, 1.35rem); color: var(--ink); margin: 1.4rem 0; padding: 1rem 1.2rem; border: 1px solid var(--rule); border-radius: .5rem; background: var(--card); display: inline-block; }
.equation b { color: var(--accent); font-weight: 500; }
.btns { display: flex; gap: .7rem; flex-wrap: wrap; margin: 1.4rem 0 .5rem; }
.btns a { display: inline-block; padding: .65rem 1.1rem; border-radius: .45rem; border: 1px solid var(--accent); font-weight: 500; }
.btns a:first-child { background: var(--accent); color: var(--accent-ink); }
.btns a:hover { text-decoration: none; filter: brightness(1.08); }
.numbers { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: 1rem; margin: 2.2rem 0; }
.numbers > div { background: var(--card); border: 1px solid var(--rule); border-radius: .5rem; padding: 1rem 1.1rem; }
.numbers b { display: block; font-size: 1.8rem; font-weight: 600; line-height: 1.1; letter-spacing: -.02em; color: var(--accent); }
.numbers span { color: var(--ink-2); font-size: .9rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1rem; margin: 1.5rem 0 2rem; }
.cards.three { grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); }
.cards > div { background: var(--card); border: 1px solid var(--rule); border-radius: .5rem; padding: 1.1rem 1.2rem; }
.cards h3 { margin: 0 0 .4rem; }
.cards p { margin: 0 0 .5rem; color: var(--ink-2); font-size: .95rem; }
.cards p:last-child { margin: 0; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: start; }
.box { background: var(--card); border: 1px solid var(--rule); border-radius: .5rem; padding: 1rem 1.2rem; margin: 1.2rem 0; }
.box h3:first-child, .box h2:first-child { margin-top: .2rem; }
.plain { background: var(--accent-soft); border-radius: .5rem; padding: 1rem 1.2rem; margin: 1.2rem 0; }
aside.jas { background: var(--warn); border-left: 4px solid var(--warn-rule); border-radius: .3rem; padding: .8rem 1rem; margin: 1.6rem 0; font-size: .95rem; color: var(--ink); }
aside.jas p:last-child { margin: 0; }
.form label { display: block; font-weight: 500; margin: 1rem 0 .3rem; }
.form input, .form select, .form textarea { width: 100%; font: inherit; padding: .55rem .7rem; border: 1px solid var(--rule); border-radius: .4rem; background: var(--paper); color: var(--ink); }
.form textarea { min-height: 8rem; }
.form .hp { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.form .g-recaptcha, .form .captcha-ph { margin-top: 1.2rem; }
.form .captcha-ph { border: 1px dashed var(--rule); border-radius: .4rem; padding: .9rem 1rem; color: var(--ink-2); font-size: .9rem; max-width: 304px; }
.form .form-err { background: var(--warn); border-left: 4px solid var(--warn-rule); border-radius: .3rem; padding: .7rem 1rem; margin: 0 0 .6rem; }
.form button { margin-top: 1.2rem; font: inherit; font-weight: 500; padding: .65rem 1.2rem; border-radius: .45rem; border: 0; background: var(--accent); color: var(--accent-ink); }
.tag { display: inline-block; font: 500 .75rem/1.4 var(--mono); padding: .05rem .4rem; border-radius: .3rem; background: var(--accent-soft); color: var(--ink); vertical-align: middle; }

/* footer */
.foot { background: var(--band); border-top: 1px solid var(--rule); padding: 2rem 0 3rem; color: var(--ink-2); font-size: .92rem; line-height: 1.7; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1.5rem; }

/* AI edition review (preview build only) */
.review .legend { font-size: .9rem; color: var(--ink-2); margin-bottom: 1.6rem; }
.rv-key { display: inline-block; font-size: .78rem; font-weight: 600; padding: .05rem .45rem; border-radius: .3rem; }
.rv-key-ai, .rv-ai::before { background: var(--accent); color: #fff; }
.rv-key-human, .rv-human::before { background: var(--rule); color: var(--ink); }
.rv-ai, .rv-human { position: relative; padding: 1.6rem 1.1rem .6rem; margin: 1.2rem 0; border-radius: .5rem; }
.rv-ai { border-left: 4px solid var(--accent); background: var(--accent-soft); }
.rv-human { border-left: 4px dashed var(--rule); opacity: .6; }
.rv-ai::before, .rv-human::before { position: absolute; top: .45rem; left: .8rem; font-size: .72rem; font-weight: 600; padding: .05rem .45rem; border-radius: .3rem; }
.rv-ai::before { content: "AI only"; }
.rv-human::before { content: "People only"; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .split { grid-template-columns: 1fr; }
  .bar { gap: .6rem 1rem; padding: .5rem 0; }
  .nav { font-size: .9rem; margin-left: 0; }
  main { padding-top: 1.6rem; }
}