:root {
  background: #f8fafc;
  color: #111827;
  font-family: Pretendard, "Noto Sans KR", "Malgun Gothic", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.72;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
}

a {
  color: #1d4ed8;
  font-weight: 700;
  text-decoration: none;
}

header,
footer {
  background: #ffffff;
  border-color: #e5e7eb;
}

header {
  border-bottom: 1px solid #e5e7eb;
  padding: 18px 24px;
}

.header-inner,
main,
.footer-inner {
  margin: 0 auto;
  max-width: 1040px;
}

.brand {
  color: #0f172a;
  display: inline-flex;
  flex-direction: column;
  margin-bottom: 14px;
}

.brand strong {
  font-size: 24px;
}

.brand span {
  color: #64748b;
  font-size: 14px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.play-install-band {
  align-items: center;
  background: #eef4ff;
  border: 1px solid #bdd0fa;
  border-radius: 12px;
  display: flex;
  gap: 18px;
  justify-content: space-between;
  margin: 0 auto 24px;
  max-width: 1040px;
  padding: 18px 20px;
}

.play-install-band p {
  margin: 0;
}

.play-install-button {
  background: #0b3ea8;
  border-radius: 10px;
  color: #ffffff;
  flex: 0 0 auto;
  padding: 12px 16px;
}

main {
  padding: 28px 20px 64px;
}

.article {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 30px;
}

.eyebrow {
  color: #2563eb;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  margin: 0 0 8px;
  text-transform: uppercase;
}

h1 {
  font-size: 36px;
  line-height: 1.24;
  margin: 0 0 12px;
}

h2 {
  border-top: 1px solid #e5e7eb;
  font-size: 24px;
  margin: 32px 0 10px;
  padding-top: 24px;
}

h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

p {
  margin-top: 0;
}

.lead {
  color: #334155;
  font-size: 18px;
}

.muted {
  color: #64748b;
}

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: #f8fafc;
  border: 1px solid #dbe4ef;
  border-radius: 8px;
  padding: 16px;
}

.card p:last-child,
.article p:last-child,
li:last-child {
  margin-bottom: 0;
}

.checklist li,
.steps li {
  margin-bottom: 10px;
}

table {
  border-collapse: collapse;
  margin: 14px 0;
  width: 100%;
}

th,
td {
  border: 1px solid #e5e7eb;
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #eff6ff;
}

.sample-list {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.sample-list img {
  aspect-ratio: 3 / 4;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  object-fit: contain;
  width: 100%;
}

.notice {
  background: #fefce8;
  border: 1px solid #fde68a;
  border-radius: 8px;
  color: #713f12;
  padding: 14px;
}

footer {
  border-top: 1px solid #e5e7eb;
  color: #475569;
  padding: 22px 24px;
}

@media (max-width: 760px) {
  .article {
    padding: 22px;
  }

  h1 {
    font-size: 30px;
  }

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

  .play-install-band {
    align-items: stretch;
    flex-direction: column;
  }

  .play-install-button {
    text-align: center;
  }
}