:root {
  color-scheme: light;
  --green: #0F473C;
  --green-deep: #0A352D;
  --cream: #F3F0E7;
  --paper: #FFFDF8;
  --ink: #121715;
  --muted: #52645B;
  --line: #D6DED7;
}

* { box-sizing: border-box; }
html { background: var(--cream); scroll-padding-top: 1rem; }
body { margin: 0; color: var(--ink); font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", Arial, sans-serif; font-size: 1rem; line-height: 1.75; word-break: keep-all; overflow-wrap: anywhere; }
a { color: var(--green); text-underline-offset: .22em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid #C75A30; outline-offset: 5px; }
p { margin: 0 0 1rem; }
h1, h2, h3 { color: var(--green-deep); line-height: 1.35; letter-spacing: -.035em; }
h1 { margin: 0 0 1.25rem; font-size: clamp(2rem, 4.5vw, 3.25rem); }
h2 { margin: 0 0 1rem; font-size: 1.5rem; }
h3 { margin: 0 0 .8rem; font-size: 1.2rem; }
nav, .actions { display: flex; flex-wrap: wrap; gap: .6rem 1.25rem; align-items: center; }
nav a { display: inline-flex; align-items: center; min-height: 44px; }
.skip-link { position: absolute; top: .5rem; left: 1rem; padding: .6rem 1rem; background: var(--paper); z-index: 1; transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }
.site-header { color: var(--paper); background: var(--green); }
.header-inner { max-width: 1120px; margin: auto; padding: 1.25rem 2rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem 2rem; }
.site-header a { color: var(--paper); }
.site-header nav { font-size: .9rem; }
.site-header [aria-current="page"] { text-decoration-thickness: 2px; font-weight: 700; }
.brand { display: flex; align-items: center; gap: .85rem; text-decoration: none; }
.brand img { object-fit: contain; flex-shrink: 0; }
.brand strong { display: block; font-size: 1.15rem; letter-spacing: .04em; line-height: 1.3; }
.brand span span { display: block; margin-top: .3rem; font-size: .75rem; letter-spacing: .04em; }
.page { max-width: 1120px; margin: auto; padding: 0 2rem 4rem; }
.hero { padding: 4rem 0 3rem; max-width: 850px; }
.eyebrow, .step-label { color: var(--green); font-weight: 800; font-size: .85rem; letter-spacing: .06em; }
.subtitle { color: var(--green); font-size: clamp(1.3rem, 2.5vw, 1.8rem); font-weight: 650; line-height: 1.55; }
.intro { max-width: 700px; margin: 1.25rem 0 1.75rem; color: var(--muted); font-size: 1.1rem; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 1.25rem; min-height: 50px; padding: .65rem 1.4rem; border: 1px solid var(--green); border-radius: .6rem; background: var(--green); color: var(--paper); font-weight: 750; text-decoration: none; }
.button:hover { background: var(--green-deep); }
.button.secondary { background: transparent; color: var(--green); }
.button.secondary:hover { background: #DDEAE5; }
.section { padding: 2.5rem 0; border-top: 1px solid var(--line); }
.section > p { max-width: 800px; }
.section > h2:not(:first-child) { margin-top: 2rem; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-top: 1.5rem; }
.card { padding: 1.75rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--paper); }
.card p:last-child { margin-bottom: 0; }
.card p { color: var(--muted); }
.card .step-label { color: var(--green); }
.callout { padding: 2rem; background: #DDEAE5; border-radius: 1rem; }
.callout p { max-width: 800px; }
.callout p:last-child { margin-bottom: 0; }
.text-link { display: inline-block; padding: .5rem 0; font-weight: 700; }
.site-url { overflow-wrap: anywhere; }
.jump-links { margin: 1.5rem 0; }
.device-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; margin-bottom: 2.5rem; }
.steps { padding-left: 1.5rem; margin: 1.5rem 0; }
.steps li { padding-left: .25rem; margin-bottom: 1.25rem; }
.steps li::marker { color: var(--green); font-weight: 800; }
.steps strong { color: var(--green-deep); }
.steps p { margin: .35rem 0 0; }
.note { padding-top: 1rem; border-top: 1px solid var(--line); font-size: .95rem; }
.site-footer { padding: 2rem; border-top: 1px solid var(--line); text-align: center; color: var(--muted); font-size: .9rem; }
.site-footer p { margin: 0; }
.site-footer nav { justify-content: center; margin-top: .5rem; }

@media (max-width: 760px) {
  .header-inner { padding: 1rem 1.25rem; }
  .page { padding: 0 1.25rem 2.5rem; }
  .hero { padding: 2.5rem 0 2rem; }
  .card-grid, .device-grid { grid-template-columns: 1fr; }
  .card, .callout { padding: 1.5rem; }
  .section { padding: 2rem 0; }
}

@media (max-width: 380px) {
  .header-inner, .page { padding-left: 1rem; padding-right: 1rem; }
  .brand img { width: 64px; height: 44px; }
  .card, .callout { padding: 1.25rem; }
  .actions { align-items: stretch; flex-direction: column; }
}