:root {
  --paper: #F2F8FA;
  --paper-deep: #E3F0F5;
  --ink: #0A2F44;
  --ink-soft: #3D5B6B;
  --pool: #1B86A8;
  --pool-deep: #0E6283;
  --droplet: #9FD3E3;
  --rule: #C9DFE8;
  --accent: #C93A68;
  --font-head: "Familjen Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Literata", Georgia, "Times New Roman", serif;
  --measure: 66ch;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
  font-weight: 400;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--pool-deep); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff; padding: 0.6rem 1rem; z-index: 10; }
.skip:focus { left: 0; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.site-header .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
}
.logo { display: inline-flex; align-items: center; text-decoration: none; color: var(--ink); }
.logo svg { height: 40px; width: auto; display: block; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; }
.site-nav a {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { border-bottom-color: var(--droplet); color: var(--ink); }
.site-nav a[aria-current="page"] { border-bottom-color: var(--pool); }

/* Layout */
main { display: block; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }
.prose { max-width: var(--measure); }

h1, h2, h3 { font-family: var(--font-head); color: var(--ink); line-height: 1.12; letter-spacing: -0.015em; font-weight: 600; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4rem); margin: 0 0 1.25rem; }
h2 { font-size: clamp(1.55rem, 3vw, 2.05rem); margin: 3rem 0 0.75rem; }
h3 { font-size: 1.25rem; margin: 2rem 0 0.4rem; letter-spacing: -0.005em; }
p { margin: 0 0 1.1rem; }
.lede { font-size: 1.3rem; line-height: 1.55; color: var(--ink-soft); max-width: 58ch; }

ul, ol { padding-left: 1.3rem; margin: 0 0 1.25rem; }
li { margin-bottom: 0.5rem; padding-left: 0.2rem; }
li::marker { color: var(--pool); }

.page-head { padding: 3.5rem 0 1.5rem; }
.page-body { padding-bottom: 4.5rem; }
.page-body > .wrap > .prose > h2:first-child { margin-top: 1rem; }

/* Home hero */
.hero { padding: 3.5rem 0 3rem; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 3rem; align-items: center; }
.hero h1 { font-size: clamp(2.8rem, 6.6vw, 5rem); }

.demo { margin: 0; }
.demo-frame {
  position: relative;
  background: var(--pool-deep);
  border-radius: 28px;
  padding: 1.2rem;
}
.demo svg { display: block; width: 100%; height: auto; }
.demo .scene { transition: filter 1.6s ease; filter: blur(7px); }
.demo.wet .scene { filter: blur(0); }
.demo .beads { transition: opacity 1.6s ease; opacity: 1; }
.demo.wet .beads { opacity: 0; }
.demo .film { transition: opacity 1.6s ease; opacity: 0; }
.demo.wet .film { opacity: 1; }
.demo .haze { transition: opacity 1.6s ease; opacity: 0.5; }
.demo.wet .haze { opacity: 0; }
.demo-controls { display: flex; align-items: center; gap: 1rem; padding: 1rem 0.4rem 0; flex-wrap: wrap; }
.demo-controls button {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  background: var(--ink);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  cursor: pointer;
}
.demo-controls button:hover { background: var(--pool-deep); }
.demo figcaption { font-family: var(--font-head); font-size: 1rem; line-height: 1.4; color: var(--ink-soft); flex: 1 1 14rem; }
.demo-status { font-weight: 600; color: var(--ink); }

/* Home facts */
.facts { background: var(--paper-deep); padding: 3.5rem 0; }
.facts .wrap { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.5rem; }
.facts h2 { margin: 0 0 0.5rem; font-size: 1.45rem; }
.facts p { margin: 0; color: var(--ink-soft); font-size: 1.05rem; }

.next { padding: 3.5rem 0 4.5rem; }
.next ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--rule); max-width: 900px; }
.next li { margin: 0; padding: 0; border-bottom: 1px solid var(--rule); }
.next li:nth-child(odd) { border-right: 1px solid var(--rule); }
.next li a { display: block; padding: 1.2rem 1.25rem; text-decoration: none; font-family: var(--font-head); font-size: 1.25rem; font-weight: 600; color: var(--ink); }
.next li a span { display: block; font-family: var(--font-body); font-weight: 400; font-size: 1rem; color: var(--ink-soft); margin-top: 0.15rem; }
.next li a:hover { background: var(--paper-deep); color: var(--ink); }

/* Figures */
.photo-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; margin: 1.5rem 0 2rem; max-width: 900px; }
.photo-pair figure { margin: 0; }
.photo-pair img { border-radius: 10px; width: 100%; }
.photo-pair figcaption { font-family: var(--font-head); font-size: 0.98rem; color: var(--ink-soft); margin-top: 0.5rem; line-height: 1.4; }

/* Steps */
ol.steps { list-style: none; counter-reset: step; padding: 0; max-width: var(--measure); }
ol.steps li { counter-increment: step; position: relative; padding: 0 0 0 3.2rem; margin-bottom: 1.4rem; }
ol.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0.05rem;
  width: 2.1rem; height: 2.1rem; border-radius: 50%;
  background: var(--pool-deep); color: #fff;
  font-family: var(--font-head); font-weight: 600; font-size: 1.05rem;
  display: grid; place-items: center;
}
ol.steps strong { font-family: var(--font-head); font-size: 1.15rem; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.5rem 0 2rem; max-width: 960px; }
table { border-collapse: collapse; width: 100%; font-size: 1rem; line-height: 1.5; }
th, td { text-align: left; vertical-align: top; padding: 0.8rem 1rem; border-bottom: 1px solid var(--rule); }
thead th { font-family: var(--font-head); font-weight: 600; border-bottom: 2px solid var(--ink); background: transparent; }
tbody th { font-family: var(--font-head); font-weight: 600; width: 22%; }
td.nc, th.nc { background: var(--paper-deep); }

/* FAQ */
.faq dt { font-family: var(--font-head); font-weight: 600; font-size: 1.2rem; margin-top: 2rem; }
.faq dd { margin: 0.3rem 0 0; }

/* Call-out */
.note { border-left: 4px solid var(--pool); background: var(--paper-deep); padding: 1rem 1.25rem; margin: 2rem 0; max-width: var(--measure); }
.note p:last-child { margin-bottom: 0; }

.quiet { font-size: 1rem; color: var(--ink-soft); }
.quiet a { color: var(--ink-soft); }
.quiet a:hover { color: var(--accent); }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); background: var(--paper-deep); padding: 2.5rem 0 3rem; font-size: 0.95rem; color: var(--ink-soft); line-height: 1.6; }
.site-footer .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 2rem; }
.site-footer p { margin: 0 0 0.6rem; }
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--accent); }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.3rem 1.25rem; }
.site-footer li { margin: 0; padding: 0; }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .facts .wrap { grid-template-columns: minmax(0, 1fr); gap: 1.75rem; }
  .site-footer .wrap { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 620px) {
  body { font-size: 1.05rem; }
  .photo-pair { grid-template-columns: minmax(0, 1fr); }
  .next ul { grid-template-columns: minmax(0, 1fr); }
  .next li:nth-child(odd) { border-right: 0; }
  .page-head { padding-top: 2.25rem; }
  .hero { padding-top: 2rem; }
  th, td { padding: 0.65rem 0.7rem; }
}
@media (prefers-reduced-motion: reduce) {
  .demo .scene, .demo .beads, .demo .film, .demo .haze { transition: none; }
}