/* Kinetic Hub — single stylesheet. No external resources, no web fonts. */

:root {
  --ink:        #1c2420;
  --ink-soft:   #46554d;
  --pine:       #103127;
  --pine-mid:   #1f5443;
  --clay:       #8a3a1c;
  --clay-deep:  #6d2d13;
  --paper:      #faf7f1;
  --paper-warm: #f2ece1;
  --paper-card: #ffffff;
  --line:       #d9d0c1;
  --line-firm:  #b9ad99;
  --radius:     4px;
  --measure:    41rem;
  --step:       1.15rem;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-head: Georgia, "Iowan Old Style", "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.68;
  overflow-wrap: break-word;
}

/* ---------- skip link ---------- */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--pine);
  color: #fff;
  padding: 0.7rem 1.1rem;
  z-index: 50;
}
.skip:focus { left: 0; }

a { color: var(--clay-deep); }
a:hover { color: var(--clay); }

:focus-visible {
  outline: 3px solid var(--clay);
  outline-offset: 2px;
}

/* ---------- header ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--pine);
  color: #f3efe6;
  border-bottom: 3px solid var(--clay);
}

.head-inner {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0.6rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: #f7f3ea;
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 1.2rem;
  letter-spacing: 0.01em;
  margin-right: auto;
}
.brand:hover { color: #fff; }

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid #58796c;
  border-radius: var(--radius);
  background: #0a251d;
  color: #e6d9c2;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  font-family: var(--font);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid #6b8a7e;
  border-radius: var(--radius);
  color: #f3efe6;
  font: inherit;
  font-size: 0.95rem;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.9rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  color: #ddeae2;
  text-decoration: none;
  font-size: 0.94rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: #fff; border-bottom-color: var(--clay); }
.site-nav a[aria-current="page"] { color: #fff; border-bottom-color: #e2c79a; }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav {
    flex-basis: 100%;
    display: none;
    padding-bottom: 0.5rem;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav a {
    padding: 0.55rem 0;
    border-bottom: 1px solid #2c5f4f;
  }
}

/* ---------- layout ---------- */

main { display: block; }

.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1rem;
}

.prose { max-width: var(--measure); }

.band { padding: 2.6rem 0; border-bottom: 1px solid var(--line); }
.band-warm { background: var(--paper-warm); }
.band-pine { background: var(--pine); color: #eef3ef; }
.band-pine a { color: #f0d2b3; }
.band-pine h2 { color: #fff; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--pine);
  line-height: 1.25;
  margin: 0 0 0.6rem;
  font-weight: 600;
}

h1 { font-size: clamp(1.75rem, 1.3rem + 2vw, 2.5rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.35rem, 1.15rem + 0.9vw, 1.75rem); margin-top: 2.2rem; }
h3 { font-size: 1.18rem; margin-top: 1.6rem; }
h4 { font-size: 1.02rem; margin-top: 1.3rem; font-family: var(--font); }

p, ul, ol, dl, table, figure { margin: 0 0 var(--step); }

.lede {
  font-size: 1.16rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
  color: var(--clay-deep);
  margin: 0 0 0.7rem;
  font-weight: 600;
}
.band-pine .eyebrow { color: #e2c79a; }

ul, ol { padding-left: 1.3rem; }
li { margin-bottom: 0.45rem; }

/* ---------- hero: key-points strip ---------- */

.hero { padding: 2.8rem 0 2rem; background: var(--paper-warm); border-bottom: 1px solid var(--line); }

.keypoints {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1px;
  background: var(--line-firm);
  border: 1px solid var(--line-firm);
  border-radius: var(--radius);
  margin-top: 1.8rem;
}
.keypoints > div {
  background: var(--paper-card);
  padding: 1rem 1.1rem;
}
.keypoints h2 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--clay-deep);
}
.keypoints p { margin: 0; font-size: 0.97rem; }

/* ---------- disclosure ---------- */

.disclosure {
  border: 2px solid var(--clay);
  border-radius: var(--radius);
  background: #fdf3ea;
  padding: 1.15rem 1.25rem;
  margin: 1.8rem 0;
}
.disclosure h2, .disclosure p:first-child strong { font-size: 1.05rem; }
.disclosure h2 {
  margin: 0 0 0.4rem;
  font-family: var(--font);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--clay-deep);
}
.disclosure p:last-child { margin-bottom: 0; }

.link-note {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 0.5rem 0 0;
}

.linkout {
  display: inline-block;
  border: 1px solid var(--clay-deep);
  border-radius: var(--radius);
  background: var(--clay-deep);
  color: #fff;
  text-decoration: none;
  font-size: 1rem;
  padding: 0.65rem 1.15rem;
}
.linkout:hover { background: var(--clay); color: #fff; }
.band-pine .linkout { border-color: #e2c79a; background: transparent; color: #fff; }
.band-pine .linkout:hover { background: #0a251d; }

/* ---------- boxes ---------- */

.card {
  border: 1px solid var(--line-firm);
  border-radius: var(--radius);
  background: var(--paper-card);
  padding: 1.2rem 1.3rem;
  margin: 0 0 1.2rem;
}
.card h2,
.card h3 { margin-top: 0; font-size: 1.18rem; }
.card > :last-child { margin-bottom: 0; }

.callout {
  border-left: 5px solid var(--pine-mid);
  background: #eef2ee;
  padding: 1rem 1.2rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
}
.callout > :last-child { margin-bottom: 0; }

.watch {
  border: 1px solid var(--clay);
  border-top: 5px solid var(--clay);
  background: #fdf5ef;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius);
  margin: 1.6rem 0;
}
.watch h3 { margin-top: 0; color: var(--clay-deep); }
.watch > :last-child { margin-bottom: 0; }

.quick {
  background: var(--pine);
  color: #eef3ef;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius);
  margin: 1.6rem 0;
}
.quick h2,
.quick h3 { color: #fff; margin-top: 0; font-size: 1.18rem; }
.quick a { color: #f0d2b3; }
.quick > :last-child { margin-bottom: 0; }

.method {
  border: 1px dashed var(--line-firm);
  background: var(--paper-warm);
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius);
  margin: 1.6rem 0;
}
.method h3 { margin-top: 0; }
.method > :last-child { margin-bottom: 0; }

/* ---------- table of contents ---------- */

.toc {
  border: 1px solid var(--line-firm);
  border-radius: var(--radius);
  background: var(--paper-card);
  padding: 1rem 1.2rem;
  margin: 1.6rem 0 2rem;
}
.toc h2 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}
.toc ol { margin: 0; padding-left: 1.2rem; }
.toc li { margin-bottom: 0.3rem; }

/* ---------- tables ---------- */

.table-scroll { overflow-x: auto; margin: 0 0 1.4rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.97rem;
  background: var(--paper-card);
}
caption {
  text-align: left;
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding-bottom: 0.5rem;
}
th, td {
  border: 1px solid var(--line-firm);
  padding: 0.6rem 0.7rem;
  text-align: left;
  vertical-align: top;
}
thead th { background: var(--paper-warm); }

/* ---------- definition list ---------- */

dl.defs { margin: 0 0 1.4rem; }
dl.defs dt {
  font-weight: 700;
  color: var(--pine);
  margin-top: 1rem;
}
dl.defs dd { margin: 0.2rem 0 0; }

/* ---------- checklist ---------- */

ul.checklist { list-style: none; padding-left: 0; }
ul.checklist li {
  position: relative;
  padding-left: 1.9rem;
  margin-bottom: 0.6rem;
}
ul.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 1.05rem;
  height: 1.05rem;
  border: 2px solid var(--pine-mid);
  border-radius: 2px;
}

/* ---------- steps ---------- */

ol.steps { counter-reset: step; list-style: none; padding-left: 0; }
ol.steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 2.6rem;
  margin-bottom: 1.1rem;
}
ol.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.9rem;
  height: 1.9rem;
  display: grid;
  place-items: center;
  background: var(--pine);
  color: #fff;
  border-radius: 50%;
  font-size: 0.9rem;
}

/* ---------- accordion ---------- */

details.faq {
  border: 1px solid var(--line-firm);
  border-radius: var(--radius);
  background: var(--paper-card);
  margin-bottom: 0.7rem;
}
details.faq > summary {
  cursor: pointer;
  padding: 0.85rem 1rem;
  font-weight: 600;
  color: var(--pine);
  list-style-position: inside;
}
details.faq[open] > summary { border-bottom: 1px solid var(--line); }
details.faq > div { padding: 0.9rem 1rem 0.2rem; }

/* ---------- index cards ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.1rem;
}
.grid .card { margin: 0; }
.grid .card h3 { font-size: 1.08rem; }
.grid .card p { font-size: 0.97rem; margin-bottom: 0.6rem; }

.figure-svg {
  border: 1px solid var(--line-firm);
  border-radius: var(--radius);
  background: var(--paper-card);
  padding: 1rem;
}
.figure-svg svg { width: 100%; height: auto; display: block; }
.figure-svg figcaption {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 0.7rem;
}

.related ul { list-style: none; padding-left: 0; }
.related li { border-bottom: 1px solid var(--line); padding: 0.55rem 0; margin: 0; }
.related li:last-child { border-bottom: 0; }

.meta-line { font-size: 0.92rem; color: var(--ink-soft); }

/* ---------- footer ---------- */

.site-foot {
  background: var(--pine);
  color: #dfe8e3;
  padding: 2.4rem 0 2.8rem;
  font-size: 0.96rem;
  line-height: 1.6;
}
.site-foot a { color: #f0d2b3; }
.site-foot a:hover { color: #fff; }
.site-foot h2 {
  color: #fff;
  font-size: 1rem;
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin: 0 0 0.7rem;
}
.foot-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.6rem;
}
.publisher p { margin: 0 0 0.15rem; }
.publisher .site-line { font-family: var(--font-head); font-size: 1.15rem; color: #fff; margin-bottom: 0.4rem; }
.foot-links { padding: 0; list-style: none; margin: 0.3rem 0 0; }
.foot-links li { display: inline; }
.foot-links li + li::before { content: " · "; }
.trademark {
  border-top: 1px solid #2c5f4f;
  margin-top: 1.7rem;
  padding-top: 1.1rem;
  font-size: 0.9rem;
  color: #c6d4cd;
}
.reviewed { font-size: 0.9rem; color: #c6d4cd; margin: 0.6rem 0 0; }

@media (max-width: 460px) {
  body { font-size: 1.02rem; }
  .wrap { padding: 0 1rem; }
}