:root {
  --blue: #0874f9;
  --blue-2: #3d96f5;
  --blue-dark: #0560d4;
  --blue-light: #eaf4ff;
  --bg: #f9fbff;
  --ink: #101c3d;
  --ink-2: #526078;
  --card: #fff;
  --border: #dfe8f4;
  --radius: 16px;
  --shadow: 0 8px 24px rgba(16, 28, 61, .08);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 90px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 Inter, "Segoe UI", Roboto, Arial, sans-serif;
  overflow-x: hidden;
}

a { color: var(--blue-dark); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 6px; }
img, svg { max-width: 100%; height: auto; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -.015em; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.3rem); font-weight: 800; }
h2 { font-size: clamp(1.45rem, 3vw, 2rem); font-weight: 750; }
h3 { font-size: 1.15rem; font-weight: 650; }
p { margin: 0 0 1em; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .container { padding: 0 32px; } }

.skip { position: absolute; left: 12px; top: -60px; background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 10px; z-index: 10; }
.skip:focus { top: 12px; color: #fff; }

/* Header */
header {
  position: sticky; top: 0; z-index: 5;
  background: rgba(249, 251, 255, .94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding: 12px 0; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; font-size: 1.2rem; color: var(--ink); text-decoration: none; }
.logo span span { color: var(--blue); }
.logo svg { width: 34px; height: 34px; }
nav ul { display: flex; flex-wrap: wrap; gap: 2px; list-style: none; margin: 0; padding: 0; }
nav a { display: block; padding: 8px 12px; border-radius: 999px; color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: .95rem; }
nav a:hover, nav a[aria-current="page"] { background: var(--blue-light); color: var(--blue-dark); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 14px 26px; border-radius: 14px;
  font-weight: 650; text-decoration: none; border: 1px solid transparent;
  transition: background-color .15s, transform .15s;
}
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 10px 24px rgba(8, 116, 249, .28); }
.btn-primary:hover { background: var(--blue-dark); color: #fff; }
.btn-primary:active { transform: translateY(1px); }
.btn-secondary { background: var(--card); color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--blue-2); color: var(--blue-dark); }

/* Hero */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(900px 500px at 85% 20%, rgba(61, 150, 245, .22), transparent 60%), linear-gradient(#fff, var(--bg));
  border-bottom: 1px solid var(--border);
}
.hero::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 10px; background: var(--blue); }
.hero-grid { display: grid; gap: 32px; padding-block: 48px 56px; align-items: center; }
@media (min-width: 960px) { .hero-grid { grid-template-columns: 1.08fr .92fr; gap: 48px; padding-block: 80px; } .hero::before { width: 14px; } }
.eyebrow { display: inline-block; font-size: .82rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--blue-dark); background: var(--blue-light); padding: 6px 12px; border-radius: 999px; margin-bottom: 18px; }
.accent { color: var(--blue); }
.subtitle { font-size: clamp(1.1rem, 2vw, 1.28rem); font-weight: 500; max-width: 38ch; line-height: 1.5; }
.muted { color: var(--ink-2); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 20px; }
@media (max-width: 479px) { .actions .btn { width: 100%; } }
figure { margin: 0; }
figcaption { font-size: .78rem; color: var(--ink-2); text-align: right; }

.note { background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--blue); border-radius: 10px; padding: 14px 16px; font-size: .93rem; color: var(--ink-2); line-height: 1.5; }
.note p { margin: 0; }

/* Sections */
section { padding: 64px 0; }
@media (min-width: 960px) { section { padding: 80px 0; } }
.tint { background: linear-gradient(var(--blue-light), var(--bg)); }
.kicker { font-size: .82rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; color: var(--blue-dark); margin-bottom: 6px; }

.grid { display: grid; gap: 20px; }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card p { color: var(--ink-2); font-size: .97rem; }
.card a { font-weight: 600; }

.article { max-width: 760px; }
.article h3 { margin-top: 1.6em; }
.article ul, .article ol { padding-left: 1.3em; }
.article li { margin-bottom: .4em; }
.article li::marker { color: var(--blue); }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; background: #fff; margin-bottom: 1.4em; }
table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--border); }
th { background: var(--blue-light); }
tr:last-child td { border-bottom: 0; }

.warning { background: #fff7e6; border: 1px solid #f1d199; color: #6b4a00; border-radius: 10px; padding: 14px 16px; margin-bottom: 1.4em; }
.warning p { margin: 0; }

details { background: var(--card); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; }
summary { cursor: pointer; padding: 16px 20px; font-weight: 600; }
details p { padding: 0 20px 16px; margin: 0; color: var(--ink-2); }

.cta { border-radius: 24px; background: linear-gradient(120deg, var(--blue), var(--blue-2)); color: #fff; padding: 40px 28px; display: grid; gap: 20px; align-items: center; }
.cta h2 { color: #fff; }
.cta p { margin: 0; opacity: .92; }
.cta .btn { background: #fff; color: var(--blue-dark); }
@media (min-width: 860px) { .cta { grid-template-columns: 1fr auto; padding: 52px; } }

/* Inner pages */
.page-head { position: relative; background: linear-gradient(#fff, var(--blue-light) 160%); border-bottom: 1px solid var(--border); padding: 40px 0; }
.page-head::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 8px; background: var(--blue); }
.page-head h1 { font-size: clamp(1.8rem, 4.2vw, 2.6rem); }
.page-head p { color: var(--ink-2); max-width: 66ch; margin: 0; }
.doc { padding: 40px 0 72px; }

dl.kv { display: grid; grid-template-columns: 1fr; margin: 0; }
@media (min-width: 560px) { dl.kv { grid-template-columns: 200px 1fr; } }
.kv dt { font-weight: 600; color: var(--ink-2); padding: 12px 0 0; }
.kv dd { margin: 0; padding: 4px 0 12px; border-bottom: 1px solid var(--border); overflow-wrap: anywhere; }
@media (min-width: 560px) { .kv dt, .kv dd { padding: 12px 0; border-bottom: 1px solid var(--border); } }

/* Footer */
footer { background: var(--ink); color: #c9d3e6; padding: 48px 0 28px; font-size: .93rem; }
footer a { color: #e7eefb; text-decoration: none; }
footer a:hover { color: #fff; text-decoration: underline; }
.footer-grid { display: grid; gap: 28px; }
@media (min-width: 860px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
footer .title { color: #fff; font-weight: 650; text-transform: uppercase; font-size: .82rem; letter-spacing: .06em; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: 32px; padding-top: 18px; font-size: .85rem; color: #9fb0cc; }