:root {
  --ink: #10231d;
  --muted: #5f746d;
  --line: #d9e6e0;
  --soft: #f2f8f5;
  --panel: #ffffff;
  --brand: #0f7a5d;
  --brand-dark: #0b4439;
  --accent: #e7b64b;
  --shadow: 0 24px 70px rgba(18, 48, 39, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fbfdfb;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1rem; }
code {
  padding: .15rem .35rem;
  border-radius: 6px;
  background: #eef6f2;
  color: #0d5f4a;
  font-size: .95em;
}
.r8-wrap { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.r8-skip {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 30;
  transform: translateY(-140%);
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
}
.r8-skip:focus { transform: translateY(0); }

.r8-top {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(16px);
}
.r8-top__inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.r8-brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.r8-brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--brand), #53b68d);
  color: #fff;
  font-weight: 900;
  letter-spacing: .02em;
}
.r8-brand__text { display: grid; line-height: 1.2; }
.r8-brand__text strong { font-size: 1.05rem; }
.r8-brand__text small {
  max-width: 370px;
  overflow: hidden;
  color: var(--muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.r8-nav { display: flex; align-items: center; gap: 8px; }
.r8-nav a {
  padding: 9px 12px;
  border-radius: 999px;
  color: #23433a;
  font-weight: 750;
  font-size: .92rem;
}
.r8-nav a:hover { background: var(--soft); color: var(--brand); }
.r8-menu-btn { display: none; }

.r8-hero {
  background:
    radial-gradient(circle at 88% 18%, rgba(231, 182, 75, .24), transparent 28%),
    linear-gradient(135deg, #0a312a 0%, #0e5d49 100%);
  color: #fff;
}
.r8-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 48px;
  align-items: center;
  min-height: 470px;
  padding-block: 70px;
}
.r8-kicker,
.r8-section-head span,
.r8-doc__head > span,
.r8-reading aside > span {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--brand);
  font-weight: 900;
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.r8-hero .r8-kicker { color: #f1ca67; }
.r8-hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  line-height: .96;
  letter-spacing: -.04em;
}
.r8-hero p {
  max-width: 630px;
  margin-top: 22px;
  color: rgba(255,255,255,.82);
  font-size: 1.14rem;
}
.r8-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.r8-btn,
.r8-login-card button,
.r8-doc__tools a,
.r8-doc__tools button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 0;
  border-radius: 10px;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}
.r8-btn--solid { background: var(--accent); color: #14231d; }
.r8-btn--light { border: 1px solid rgba(255,255,255,.35); color: #fff; }
.r8-login-card {
  padding: 26px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 24px;
  background: rgba(255,255,255,.1);
  box-shadow: 22px 22px 0 rgba(231, 182, 75, .16);
}
.r8-login-card span { color: rgba(255,255,255,.74); font-weight: 800; }
.r8-login-card strong {
  display: block;
  margin: 4px 0 18px;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1;
}
.r8-login-card button { width: 100%; background: #fff; color: var(--brand-dark); }
.r8-login-card dl { display: grid; gap: 12px; margin: 22px 0 0; }
.r8-login-card div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,.18);
}
.r8-login-card dt { color: rgba(255,255,255,.7); }
.r8-login-card dd { margin: 0; font-weight: 850; }

.r8-strip { border-bottom: 1px solid var(--line); background: #fff; }
.r8-strip__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
}
.r8-strip__grid div { padding: 22px 26px; border-left: 1px solid var(--line); }
.r8-strip__grid div:last-child { border-right: 1px solid var(--line); }
.r8-strip b { display: block; }
.r8-strip span { color: var(--muted); }

.r8-steps,
.r8-index,
.r8-guides,
.r8-faq,
.r8-reading,
.r8-doc { padding-block: 72px; }
.r8-section-head { max-width: 690px; margin-bottom: 28px; }
.r8-section-head h2,
.r8-diagnostic h2,
.r8-related h2 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.08;
}
.r8-section-head p,
.r8-diagnostic p { color: var(--muted); }
.r8-step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.r8-step-grid article,
.r8-checklist,
.r8-ip-table,
.r8-guide-grid a,
.r8-prose,
.r8-faq details,
.r8-related a {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 10px 30px rgba(35, 67, 58, .06);
}
.r8-step-grid article { padding: 22px; }
.r8-step-grid mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--soft);
  color: var(--brand);
  font-weight: 950;
}
.r8-step-grid h3 { margin: 18px 0 8px; font-size: 1.1rem; }
.r8-step-grid p { color: var(--muted); }

.r8-diagnostic {
  padding-block: 70px;
  background: linear-gradient(180deg, #f6fbf8, #eef7f2);
}
.r8-diagnostic__grid {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 40px;
  align-items: start;
}
.r8-checklist { display: grid; gap: 12px; padding: 22px; }
.r8-checklist label {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border-radius: 12px;
  background: #f9fcfa;
  font-weight: 750;
}
.r8-checklist input { margin-top: 5px; accent-color: var(--brand); }

.r8-ip-table { overflow: hidden; }
.r8-ip-table a {
  display: grid;
  grid-template-columns: 170px 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 18px 22px;
  border-top: 1px solid var(--line);
}
.r8-ip-table a:first-child { border-top: 0; }
.r8-ip-table strong { font-size: 1.25rem; }
.r8-ip-table span { color: var(--muted); }
.r8-ip-table i { color: var(--brand); font-style: normal; font-weight: 900; }
.r8-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.r8-guide-grid a { padding: 20px; display: grid; gap: 6px; }
.r8-guide-grid small { color: var(--brand); font-weight: 900; text-transform: uppercase; letter-spacing: .08em; }
.r8-guide-grid span { color: var(--muted); }

.r8-reading,
.r8-doc__grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}
.r8-reading aside,
.r8-doc__aside {
  position: sticky;
  top: 96px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.r8-reading nav,
.r8-doc__aside nav { display: grid; gap: 8px; }
.r8-reading nav a,
.r8-doc__aside a {
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-weight: 750;
}
.r8-prose { padding: clamp(22px, 5vw, 44px); }
.r8-prose h2 { margin: 0 0 14px; font-size: clamp(1.45rem, 3vw, 2rem); line-height: 1.15; }
.r8-prose h2:not(:first-child) { margin-top: 34px; }
.r8-prose h3 { margin-top: 24px; }
.r8-prose a { color: var(--brand); font-weight: 850; text-decoration: underline; text-underline-offset: 3px; }
.r8-prose ul,
.r8-prose ol { padding-left: 1.4rem; }
.r8-prose li + li { margin-top: .45rem; }

.r8-faq__list { display: grid; gap: 12px; }
.r8-faq details { padding: 0; overflow: hidden; }
.r8-faq summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  font-weight: 900;
  cursor: pointer;
}
.r8-faq details[open] summary { border-bottom: 1px solid var(--line); }
.r8-faq p { padding: 16px 20px 20px; color: var(--muted); }
.r8-faq i { color: var(--brand); font-style: normal; }

.r8-doc__head {
  max-width: 850px;
  padding: 64px 0 36px;
}
.r8-doc__head h1 {
  margin: 0 0 18px;
  font-size: clamp(2.2rem, 6vw, 4.8rem);
  line-height: .98;
  letter-spacing: -.04em;
}
.r8-doc__intro { color: var(--muted); font-size: 1.12rem; }
.r8-doc__tools { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.r8-doc__tools a { background: var(--brand); color: #fff; }
.r8-doc__tools button { border: 1px solid var(--line); background: #fff; color: var(--brand-dark); }
.r8-doc__faq { padding-block: 46px; }
.r8-related { padding: 0 0 70px; }
.r8-related > div {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.r8-related a { display: grid; gap: 6px; padding: 18px; }
.r8-related span { color: var(--muted); }

.r8-footer {
  border-top: 1px solid var(--line);
  background: #10231d;
  color: #d9ebe5;
}
.r8-footer__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  padding-block: 32px;
}
.r8-footer p { max-width: 620px; color: #a9c3ba; }
.r8-footer nav { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
.r8-footer a { color: #fff; font-weight: 800; }

@media (max-width: 860px) {
  .r8-wrap { width: min(100% - 28px, 1120px); }
  .r8-top__inner { min-height: 68px; }
  .r8-brand__text small { display: none; }
  .r8-menu-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    padding: 9px 12px;
    color: var(--ink);
    font-weight: 900;
  }
  .r8-menu-btn span { display: block; width: 4px; height: 4px; border-radius: 50%; background: var(--brand); }
  .r8-nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: 72px;
    display: none;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
  }
  .r8-top.is-open .r8-nav { display: grid; }
  .r8-nav a { border-radius: 12px; }
  .r8-hero__grid,
  .r8-diagnostic__grid,
  .r8-reading,
  .r8-doc__grid,
  .r8-footer__grid { grid-template-columns: 1fr; }
  .r8-hero__grid { min-height: auto; padding-block: 44px; gap: 28px; }
  .r8-login-card { box-shadow: 12px 12px 0 rgba(231, 182, 75, .14); }
  .r8-strip__grid,
  .r8-step-grid,
  .r8-guide-grid,
  .r8-related > div { grid-template-columns: 1fr; }
  .r8-strip__grid div { border-left: 0; border-right: 0; border-top: 1px solid var(--line); }
  .r8-ip-table a { grid-template-columns: 1fr; gap: 8px; }
  .r8-reading aside,
  .r8-doc__aside { position: static; }
  .r8-footer nav { justify-content: flex-start; }
}

@media (max-width: 520px) {
  .r8-hero h1,
  .r8-doc__head h1 { letter-spacing: -.03em; }
  .r8-actions,
  .r8-doc__tools { display: grid; }
  .r8-btn,
  .r8-doc__tools a,
  .r8-doc__tools button { width: 100%; }
  .r8-steps,
  .r8-index,
  .r8-guides,
  .r8-faq,
  .r8-reading,
  .r8-doc { padding-block: 48px; }
  .r8-prose { padding: 20px; }
}