:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f3f1ec;
  --text: #1d1f1b;
  --muted: #5f645a;
  --line: #e3e0d8;
  --accent: #4f7d1f;
  --accent-soft: #eaf2dc;
  --accent-text: #3d6416;
  --on-accent: #ffffff;
  --code-bg: #f1efe9;
  --pre-bg: #1f231c;
  --pre-text: #e8ecdf;
  --pre-muted: #9aa58c;
  --radius: 10px;
  --wrap: 1040px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #141612;
    --surface: #1b1e18;
    --surface-2: #22261e;
    --text: #e8eae3;
    --muted: #a3a99a;
    --line: #2f342a;
    --accent: #9ccc5a;
    --accent-soft: #26311b;
    --accent-text: #b5dc7f;
  --on-accent: #10140b;
    --code-bg: #262a21;
    --pre-bg: #0f110d;
    --pre-text: #e3e8d9;
    --pre-muted: #8b957e;
    color-scheme: dark;
  }
}

:root[data-theme='dark'] {
  --bg: #141612;
  --surface: #1b1e18;
  --surface-2: #22261e;
  --text: #e8eae3;
  --muted: #a3a99a;
  --line: #2f342a;
  --accent: #9ccc5a;
  --accent-soft: #26311b;
  --accent-text: #b5dc7f;
  --on-accent: #10140b;
  --code-bg: #262a21;
  --pre-bg: #0f110d;
  --pre-text: #e3e8d9;
  --pre-muted: #8b957e;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Pretendard, 'Pretendard Variable', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Noto Sans KR',
    'Malgun Gothic', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

a {
  color: var(--accent-text);
  text-underline-offset: 3px;
}

code,
pre {
  font-family: 'JetBrains Mono', 'D2Coding', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.875em;
}

:not(pre) > code {
  background: var(--code-bg);
  border-radius: 5px;
  padding: 0.1em 0.4em;
  overflow-wrap: anywhere;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 16px;
}

/* 머리 막대 */
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.top .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: 24px;
  height: 24px;
}

.ver {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 1px 8px;
}

.top nav {
  display: flex;
  gap: 16px;
  margin-left: auto;
  overflow-x: auto;
  scrollbar-width: none;
}

.top nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
}

.top nav a:hover {
  color: var(--text);
}

/* 첫 화면 */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-text);
  font-weight: 600;
  font-size: 14px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.hero .lead {
  max-width: 680px;
  margin: 18px 0 28px;
  color: var(--muted);
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 8px;
  padding: 9px 16px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.stack li {
  font-size: 13px;
  color: var(--muted);
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 2px 10px;
}

/* 절 */
section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

section h2 {
  margin: 0 0 8px;
  font-size: 26px;
  letter-spacing: -0.01em;
}

section h3 {
  margin: 32px 0 8px;
  font-size: 18px;
}

.sub {
  margin: 0 0 24px;
  color: var(--muted);
  max-width: 720px;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.card .num {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-text);
}

/* 표 */
.table {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

th {
  background: var(--surface-2);
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: 0;
}

td:first-child {
  white-space: nowrap;
}

/* 단계 */
.steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
}

.steps > li {
  position: relative;
  padding: 0 0 28px 44px;
}

.steps > li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-weight: 700;
  font-size: 14px;
  display: grid;
  place-items: center;
}

.steps > li::after {
  content: '';
  position: absolute;
  left: 13.5px;
  top: 34px;
  bottom: 6px;
  width: 1px;
  background: var(--line);
}

.steps > li:last-child::after {
  display: none;
}

.steps h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 28px;
}

.steps p {
  margin: 0 0 10px;
}

/* 코드 */
.code {
  position: relative;
  margin: 10px 0 14px;
}

.code pre {
  margin: 0;
  background: var(--pre-bg);
  color: var(--pre-text);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  line-height: 1.6;
}

.code pre .c {
  color: var(--pre-muted);
}

.copy {
  position: absolute;
  top: 8px;
  right: 8px;
  border: 1px solid #3a4033;
  background: #2a2f25;
  color: #cfd6c3;
  font: inherit;
  font-size: 12px;
  border-radius: 6px;
  padding: 3px 8px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}

.code:hover .copy,
.copy:focus-visible {
  opacity: 1;
}

@media (hover: none) {
  .copy {
    opacity: 1;
  }
}

.note {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 16px;
  margin: 16px 0;
  font-size: 15px;
}

.note p {
  margin: 0;
}

ul.plain {
  margin: 8px 0 0;
  padding-left: 20px;
}

ul.plain li {
  margin: 4px 0;
}

.docs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 10px;
}

.docs a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--text);
  text-decoration: none;
}

.docs a:hover {
  border-color: var(--accent);
}

.docs b {
  display: block;
  font-size: 15px;
}

.docs span {
  color: var(--muted);
  font-size: 14px;
}

footer {
  padding: 32px 0 48px;
  color: var(--muted);
  font-size: 14px;
}

footer p {
  margin: 4px 0;
}

@media (max-width: 720px) {
  .top nav {
    display: none;
  }

  .hero {
    padding: 48px 0 40px;
  }

  section {
    padding: 44px 0;
  }

  /* 좁은 화면에서는 칸을 줄이지 않고 표 안에서 가로로 민다 */
  .table table {
    min-width: 640px;
  }
}