:root {
  --bg: #f7faf8;
  --sidebar: #ffffff;
  --panel: #ffffff;
  --panel-soft: #f1f8f3;
  --text: #1f2933;
  --muted: #66756b;
  --line: #d9e6dc;
  --line-strong: #bed3c3;
  --green: #2f9e55;
  --green-soft: #e6f5ea;
  --blue: #2878b8;
  --blue-soft: #e7f2fb;
  --yellow-soft: #fff7d6;
  --danger-soft: #fff0f0;
  --code-bg: #17212a;
  --code-text: #edf7f0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #fbfdfb, var(--bg));
  line-height: 1.65;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.shell {
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  border-right: 1px solid var(--line);
  background: var(--sidebar);
  padding: 24px 20px;
}

.brand {
  display: block;
  margin-bottom: 18px;
  color: var(--text);
}

.brand strong {
  display: block;
  font-size: 22px;
  font-weight: 760;
  letter-spacing: -0.02em;
}

.nav-group { margin: 22px 0; }
.nav-title {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.nav-link {
  display: block;
  margin: 2px 0;
  padding: 7px 10px;
  border-radius: 8px;
  color: #415047;
  font-size: 14px;
}

.nav-link:hover,
.nav-link.active {
  background: var(--green-soft);
  color: #173a20;
  text-decoration: none;
}

.language-switch {
  display: flex;
  gap: 8px;
  margin: 14px 0 8px;
}

.language-switch a {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fbfdfb;
  color: var(--muted);
  padding: 5px 10px;
  font-size: 13px;
  font-weight: 680;
}

.language-switch a.active {
  background: var(--green-soft);
  color: #214f2b;
  border-color: #b8dcbc;
}

.language-switch a:hover { text-decoration: none; background: var(--panel-soft); }

.content {
  width: min(960px, 100%);
  padding: 48px clamp(24px, 5vw, 72px) 88px;
}

.hero {
  border-bottom: 1px solid var(--line);
  padding-bottom: 28px;
  margin-bottom: 36px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin-top: 0;
  color: #17211a;
  line-height: 1.22;
}

h1 {
  margin-bottom: 16px;
  font-size: clamp(40px, 6vw, 64px);
  letter-spacing: -0.045em;
}

h2 {
  margin: 44px 0 14px;
  font-size: clamp(26px, 3vw, 34px);
  letter-spacing: -0.025em;
}

h3 {
  margin: 28px 0 10px;
  font-size: 20px;
}

h4 { margin: 24px 0 8px; font-size: 17px; }
p { margin: 0 0 16px; }

.lead {
  max-width: 760px;
  color: #415047;
  font-size: clamp(18px, 2vw, 22px);
}

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 8px 14px;
  font-weight: 700;
}
.button.primary { background: var(--green-soft); border-color: #aed8b6; color: #1e512b; }
.button.blue { background: var(--blue-soft); border-color: #bdd9ee; color: #1e5f91; }
.button:hover { background: #f8fcf8; text-decoration: none; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  padding: 16px;
}
.card h3 { margin-top: 0; }

.muted { color: var(--muted); }
.tag {
  display: inline-block;
  margin: 0 5px 5px 0;
  border: 1px solid #b8dcbc;
  border-radius: 999px;
  background: var(--green-soft);
  color: #275f31;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 680;
}

.notice {
  border-left: 4px solid #efc94f;
  border-radius: 8px;
  background: var(--yellow-soft);
  padding: 14px 16px;
  margin: 18px 0;
}
.notice.danger {
  border-left-color: #e78a8a;
  background: var(--danger-soft);
}

code {
  border: 1px solid rgba(48, 112, 63, 0.16);
  border-radius: 5px;
  background: rgba(47, 158, 85, 0.10);
  color: #1f512b;
  padding: 0.12em 0.34em;
  font-size: 0.92em;
}

pre {
  overflow: auto;
  border: 1px solid #253540;
  border-radius: 10px;
  background: var(--code-bg);
  padding: 16px;
}
pre code { border: 0; background: transparent; color: var(--code-text); padding: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel);
  margin: 18px 0;
}

th,
td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  vertical-align: top;
}

th {
  background: var(--panel-soft);
  color: #243229;
  text-align: left;
  font-weight: 760;
}

ul,
ol { padding-left: 22px; }
li { margin: 6px 0; }

.section-note { max-width: 760px; color: var(--muted); }
.two-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; }
.callout-title { font-weight: 760; margin-bottom: 4px; }

.footer {
  margin-top: 54px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.mobile-nav {
  display: none;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  padding: 12px 16px;
}
.mobile-nav select {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 10px;
  font-weight: 680;
}

@media (max-width: 880px) {
  .shell { display: block; }
  .sidebar { display: none; }
  .mobile-nav { display: block; }
  .content { padding-top: 28px; }
  .two-col { grid-template-columns: 1fr; }
}