:root {
  color-scheme: light;
  --ink: #102033;
  --muted: #5c6b7c;
  --line: #d9e7f5;
  --blue: #1769ff;
  --red: #ef3340;
  --green: #16b86a;
  --soft: #f6fbff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 8% 10%, rgba(23, 105, 255, 0.14), transparent 28%),
    radial-gradient(circle at 92% 8%, rgba(239, 51, 64, 0.1), transparent 28%),
    linear-gradient(180deg, #f7fcff 0%, #ffffff 54%, #eef8ff 100%);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

a {
  color: inherit;
}

.topbar,
main,
footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand,
.topbar nav a,
.button {
  text-decoration: none;
  font-weight: 900;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand span {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, var(--red), var(--blue) 52%, var(--green));
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.topbar nav a,
.button {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 24px rgba(18, 101, 255, 0.08);
  padding: 10px 13px;
}

.button.primary {
  border: 0;
  color: #fff;
  background: linear-gradient(135deg, var(--red), var(--blue) 52%, var(--green));
}

.hero,
.article,
.guide-grid,
.related,
.notice {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 22px 58px rgba(21, 73, 124, 0.11);
}

.hero {
  padding: clamp(24px, 5vw, 48px);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.7rem);
  line-height: 1.04;
}

h2,
h3 {
  margin: 0 0 10px;
}

p,
li {
  color: var(--muted);
  line-height: 1.72;
}

.hero p {
  max-width: 840px;
  font-size: 1.06rem;
}

.hero-actions,
.related-links,
.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.keywords span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--soft);
  color: #234155;
  font-size: 0.86rem;
  font-weight: 800;
  padding: 8px 10px;
}

.article {
  display: grid;
  gap: 18px;
  margin-top: 18px;
  padding: clamp(18px, 4vw, 34px);
}

.answer {
  border-left: 5px solid var(--green);
  border-radius: 14px;
  background: #f1fff7;
  padding: 16px;
}

.steps,
.faq,
.related,
.guide-grid {
  display: grid;
  gap: 14px;
}

.steps article,
.faq article,
.guide-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  padding: 16px;
}

.steps b {
  color: var(--blue);
}

.guide-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
  padding: 18px;
}

.guide-card h2 {
  font-size: 1.12rem;
}

.related,
.notice {
  margin-top: 18px;
  padding: 18px;
}

footer {
  color: #536171;
  font-size: 0.92rem;
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar nav a,
  .button {
    font-size: 0.9rem;
    padding: 9px 10px;
  }

  .guide-grid {
    grid-template-columns: 1fr;
  }
}