:root {
  --bg: #050816;
  --bg-soft: #0b1020;
  --surface: rgba(12, 18, 35, 0.88);
  --surface-strong: rgba(15, 22, 40, 0.96);
  --text: #f4f7fb;
  --text-soft: #b8c3d8;
  --text-muted: #8895ad;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(67, 224, 211, 0.2);
  --accent: #43e0d3;
  --accent-strong: #25cabb;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --container: 1120px;
  --content: 820px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Manrope", sans-serif;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(49, 88, 144, 0.22), transparent 28%),
    radial-gradient(circle at 85% 12%, rgba(67, 224, 211, 0.12), transparent 24%),
    linear-gradient(180deg, #040612 0%, #050816 45%, #03050d 100%);
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: #7ef3ea;
}

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

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(4, 8, 20, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-family: "Sora", sans-serif;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text);
}

.brand-mark {
  display: block;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 0.95rem;
  object-fit: contain;
  box-shadow: 0 0 36px rgba(67, 224, 211, 0.18);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.nav-links a {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-links a[aria-current="page"] {
  color: var(--text);
}

.page-shell {
  padding: 3.5rem 0 5rem;
}

.page-hero {
  display: grid;
  gap: 1.5rem;
  max-width: var(--content);
  margin-bottom: 2rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 1.8rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}

.page-hero h1 {
  margin: 0;
  font-family: "Sora", sans-serif;
  font-size: clamp(2.3rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.page-hero p {
  margin: 0;
  max-width: 46rem;
  color: var(--text-soft);
  font-size: 1.05rem;
}

.updated {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.meta-grid,
.card-grid {
  display: grid;
  gap: 1rem;
}

.meta-card,
.content-card,
.step-card,
.highlight-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at top right, rgba(67, 224, 211, 0.08), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015)),
    var(--surface);
  box-shadow: var(--shadow);
}

.meta-card,
.highlight-card {
  padding: 1.35rem 1.4rem;
}

.meta-card strong,
.highlight-card strong {
  display: block;
  margin-bottom: 0.45rem;
  font-family: "Sora", sans-serif;
  font-size: 1rem;
}

.meta-card p,
.highlight-card p {
  margin: 0;
  color: var(--text-soft);
}

.content-layout {
  display: grid;
  gap: 1.25rem;
  align-items: start;
}

.section-gap {
  margin-top: 1.25rem;
}

.content-card {
  padding: 1.6rem;
}

.content-card h2 {
  margin: 0 0 0.75rem;
  font-family: "Sora", sans-serif;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.content-card p {
  margin: 0;
  color: var(--text-soft);
}

.content-card p + p,
.content-card ul,
.content-card ol {
  margin-top: 0.9rem;
}

.content-card ul,
.content-card ol {
  padding-left: 1.2rem;
  color: var(--text-soft);
}

.content-card li + li {
  margin-top: 0.55rem;
}

.section-stack {
  display: grid;
  gap: 1rem;
}

.support-grid {
  display: grid;
  gap: 1rem;
}

.topic-list {
  display: grid;
  gap: 0.8rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.topic-list li,
.key-points li {
  display: grid;
  grid-template-columns: 1.1rem 1fr;
  gap: 0.8rem;
}

.topic-list li::before,
.key-points li::before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: radial-gradient(circle, #64f3e8 0%, #43e0d3 52%, rgba(67, 224, 211, 0.18) 100%);
  box-shadow: 0 0 18px rgba(67, 224, 211, 0.4);
}

.key-points {
  display: grid;
  gap: 0.8rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.step-list {
  display: grid;
  gap: 0.9rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.step-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.25rem 1.3rem;
}

.step-num {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(67, 224, 211, 0.08);
  color: var(--accent);
  font-weight: 800;
  font-size: 0.95rem;
}

.step-copy {
  color: var(--text-soft);
}

.step-copy strong {
  color: var(--text);
}

.footer {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2.2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.25rem;
}

.footer-links a {
  color: var(--text-soft);
  font-weight: 600;
}

@media (min-width: 760px) {
  .container {
    width: min(var(--container), calc(100% - 3rem));
  }

  .meta-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .support-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .content-layout {
    grid-template-columns: minmax(0, 0.88fr) minmax(17rem, 0.42fr);
  }

  .footer {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

@media (max-width: 759px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0;
  }

  .page-shell {
    padding-top: 2.6rem;
  }
}