:root {
  color-scheme: light;
  --ink: #102b3a;
  --ink-soft: #49616c;
  --canvas: #f7fafb;
  --surface: #ffffff;
  --surface-tint: #eff8fa;
  --border: #dce8eb;
  --ocean-deep: #031d28;
  --ocean: #05455c;
  --ocean-bright: #0a6781;
  --violet: #7562cc;
  --violet-pale: #f0edfc;
  --pink: #e05282;
  --pink-pale: #fceaf1;
  --coral: #ec6379;
  --shadow: 0 18px 55px rgba(3, 29, 40, 0.09);
  --radius-lg: 28px;
  --radius-md: 19px;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--ocean-bright); text-underline-offset: 0.2em; }
a:hover { color: var(--violet); }
img { max-width: 100%; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--surface);
  color: var(--ocean-deep);
  box-shadow: var(--shadow);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 232, 235, 0.84);
  background: rgba(247, 250, 251, 0.9);
  backdrop-filter: blur(18px);
}
.nav-shell, .container { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }
.nav-shell { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: 0.72rem; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: -0.03em; }
.brand img { width: 42px; height: 42px; }
.nav-links { display: flex; align-items: center; gap: 0.35rem; }
.nav-links a { padding: 0.55rem 0.78rem; border-radius: 999px; color: var(--ink-soft); font-size: 0.92rem; font-weight: 700; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ocean); background: var(--surface-tint); }
.menu-button { display: none; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--ink); padding: 0.62rem 0.9rem; font: inherit; font-weight: 700; }

.hero { position: relative; overflow: hidden; padding: clamp(4.5rem, 10vw, 8rem) 0 5rem; }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.hero::before { width: 30rem; height: 30rem; right: -10rem; top: -13rem; background: radial-gradient(circle, rgba(117, 98, 204, 0.18), transparent 68%); }
.hero::after { width: 24rem; height: 24rem; left: -10rem; bottom: -12rem; background: radial-gradient(circle, rgba(224, 82, 130, 0.14), transparent 70%); }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.16fr) minmax(290px, 0.84fr); align-items: center; gap: clamp(2rem, 7vw, 6rem); }
.eyebrow { margin: 0 0 0.8rem; color: var(--ocean-bright); font-size: 0.78rem; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -0.045em; }
h1 { max-width: 850px; margin-bottom: 1.3rem; font-size: clamp(2.7rem, 7vw, 5.8rem); }
h2 { margin-bottom: 1rem; font-size: clamp(2rem, 4vw, 3.4rem); }
h3 { margin-bottom: 0.6rem; font-size: 1.28rem; }
.lede { max-width: 720px; margin: 0; color: var(--ink-soft); font-size: clamp(1.08rem, 2vw, 1.3rem); }
.button-row { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.75rem 1.2rem; border: 1px solid transparent; border-radius: 999px; background: var(--ocean); color: #fff; font-weight: 800; text-decoration: none; box-shadow: 0 10px 25px rgba(5, 69, 92, 0.18); }
.button:hover { background: var(--ocean-deep); color: #fff; }
.button.secondary { border-color: var(--border); background: var(--surface); color: var(--ink); box-shadow: none; }
.button.secondary:hover { border-color: var(--ocean-bright); color: var(--ocean); }

.phone-card { position: relative; max-width: 420px; margin-inline: auto; padding: 1.1rem; border: 1px solid rgba(255,255,255,.8); border-radius: 38px; background: linear-gradient(145deg, #ffffff, #eaf5f7); box-shadow: 0 35px 75px rgba(3,29,40,.16); transform: rotate(1.5deg); }
.phone-screen { min-height: 470px; padding: 1.6rem 1.35rem; border: 1px solid var(--border); border-radius: 29px; background: var(--canvas); }
.mini-kicker { color: var(--ink-soft); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.mini-title { margin: .15rem 0 1.25rem; font-size: 1.7rem; font-weight: 850; letter-spacing: -.05em; }
.tracker { margin-top: .85rem; padding: 1rem; border: 1px solid var(--border); border-radius: 18px; background: var(--surface); box-shadow: 0 8px 25px rgba(3,29,40,.055); }
.tracker-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.tracker-label { font-weight: 800; }
.tracker-value { margin: .4rem 0 0; font-size: 2rem; font-weight: 850; letter-spacing: -.05em; }
.tracker-value small { font-size: .8rem; color: var(--ink-soft); letter-spacing: 0; }
.tag { display: inline-flex; align-items: center; gap: .35rem; padding: .3rem .6rem; border-radius: 999px; background: var(--surface-tint); color: var(--ocean); font-size: .72rem; font-weight: 800; }
.sparkline { width: 100%; height: 54px; margin-top: .65rem; }

.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section.alt { background: var(--surface); }
.section-heading { max-width: 720px; margin-bottom: 2.4rem; }
.section-heading p { color: var(--ink-soft); font-size: 1.08rem; }
.grid-2, .grid-3, .grid-4 { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { padding: 1.45rem; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); box-shadow: 0 10px 34px rgba(3,29,40,.055); }
.card p:last-child { margin-bottom: 0; }
.card-icon { display: grid; width: 48px; height: 48px; margin-bottom: 1.15rem; place-items: center; border: 1.5px solid currentColor; border-radius: 15px; color: var(--violet); font-size: 1.25rem; font-weight: 850; }
.card:nth-child(3n + 2) .card-icon { color: var(--pink); }
.card:nth-child(3n + 3) .card-icon { color: var(--ocean-bright); }
.card p, .muted { color: var(--ink-soft); }
.principle { padding: 2rem; border-radius: var(--radius-lg); background: linear-gradient(140deg, var(--ocean-deep), var(--ocean)); color: #fff; }
.principle p { color: rgba(255,255,255,.78); }
.principle .eyebrow { color: #82cbd0; }

.page-hero { padding: clamp(3.8rem, 8vw, 6rem) 0 3rem; }
.page-hero h1 { max-width: 900px; font-size: clamp(2.6rem, 6vw, 4.8rem); }
.page-grid { display: grid; grid-template-columns: 250px minmax(0, 1fr); align-items: start; gap: clamp(2rem, 6vw, 5rem); }
.toc { position: sticky; top: 104px; padding: 1.1rem; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); }
.toc strong { display: block; margin-bottom: .6rem; }
.toc a { display: block; padding: .38rem .5rem; border-radius: 9px; color: var(--ink-soft); font-size: .9rem; font-weight: 700; text-decoration: none; }
.toc a:hover { color: var(--ocean); background: var(--surface-tint); }
.prose { min-width: 0; }
.prose section { padding: 0 0 4rem; scroll-margin-top: 100px; }
.prose h2 { font-size: clamp(1.9rem, 4vw, 3rem); }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { color: var(--ink-soft); }
.prose li + li { margin-top: .45rem; }
.prose .lead-note { padding: 1.3rem 1.4rem; border-left: 4px solid var(--violet); border-radius: 0 var(--radius-md) var(--radius-md) 0; background: var(--violet-pale); }
.steps { list-style: none; padding: 0; counter-reset: step; }
.steps li { position: relative; min-height: 48px; margin-bottom: 1rem; padding-left: 3.5rem; counter-increment: step; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: -.12rem; display: grid; width: 2.35rem; height: 2.35rem; place-items: center; border-radius: 12px; background: var(--ocean); color: #fff; font-weight: 850; }
.callout { margin: 1.5rem 0; padding: 1.35rem; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface-tint); }
.callout.warning { border-color: #f3c4ce; background: var(--pink-pale); }
.feature-table { width: 100%; border-collapse: collapse; border-radius: var(--radius-md); overflow: hidden; background: var(--surface); box-shadow: 0 0 0 1px var(--border); }
.feature-table th, .feature-table td { padding: .9rem 1rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.feature-table th { background: var(--surface-tint); color: var(--ink); }
.feature-table tr:last-child td { border-bottom: 0; }
details { margin-bottom: .75rem; border: 1px solid var(--border); border-radius: 15px; background: var(--surface); }
summary { cursor: pointer; padding: 1rem 1.1rem; color: var(--ink); font-weight: 800; }
details > div { padding: 0 1.1rem 1.1rem; color: var(--ink-soft); }
.status { display: inline-flex; align-items: center; gap: .4rem; padding: .35rem .65rem; border-radius: 999px; background: var(--surface-tint); color: var(--ocean); font-size: .78rem; font-weight: 800; }

.site-footer { padding: 3.2rem 0; border-top: 1px solid var(--border); background: var(--surface); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2rem; }
.footer-links { display: flex; flex-wrap: wrap; align-content: start; justify-content: flex-end; gap: .7rem 1.2rem; }
.footer-links a { color: var(--ink-soft); font-weight: 700; text-decoration: none; }
.footer-note { max-width: 650px; color: var(--ink-soft); font-size: .9rem; }

@media (max-width: 900px) {
  .hero-grid, .page-grid { grid-template-columns: 1fr; }
  .phone-card { margin-top: 1rem; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .toc { position: static; }
}
@media (max-width: 700px) {
  .menu-button { display: inline-flex; }
  .nav-links { position: absolute; left: 1rem; right: 1rem; top: 68px; display: none; padding: .7rem; border: 1px solid var(--border); border-radius: 18px; background: var(--surface); box-shadow: var(--shadow); }
  .nav-links.open { display: grid; }
  .nav-links a { padding: .75rem; }
  .grid-2, .grid-3, .grid-4, .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
  .feature-table { display: block; overflow-x: auto; white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --ink: #eef7f8; --ink-soft: #b5c8cd; --canvas: #071f29; --surface: #0d2a35; --surface-tint: #123641; --border: #244651; --shadow: 0 18px 55px rgba(0,0,0,.28); --violet-pale: #272347; --pink-pale: #422430; }
  .site-header { background: rgba(7,31,41,.9); }
  .phone-card { border-color: #244651; background: linear-gradient(145deg, #123641, #071f29); }
  .button.secondary { color: var(--ink); }
  .principle { background: linear-gradient(140deg, #041820, #075f7a); }
}