:root {
  --ink: #132238;
  --muted: #52637a;
  --paper: #f5f8fb;
  --panel: #ffffff;
  --line: #d8e2ec;
  --brand: #087f8c;
  --brand-dark: #075965;
  --accent: #ffb703;
  --shadow: 0 16px 44px rgba(19, 34, 56, 0.1);
  color-scheme: light;
  font-family: "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 92% 8%, rgba(8, 127, 140, 0.14), transparent 28rem),
    var(--paper);
}

a {
  color: var(--brand-dark);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 56px);
  color: #ffffff;
  background: linear-gradient(118deg, #063f49, #087f8c);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  color: inherit;
  text-decoration: none;
}

.brand img {
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: clamp(1.15rem, 2.4vw, 1.65rem);
}

.brand small {
  margin-top: 4px;
  color: #d9f4f5;
}

.nav-toggle {
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 10px;
  color: #ffffff;
  background: transparent;
  cursor: pointer;
}

.page-shell {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  align-items: start;
  max-width: 1540px;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 0;
  min-height: calc(100vh - 100px);
  padding: 30px 18px;
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(10px);
}

.sidebar ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar a {
  display: block;
  padding: 11px 13px;
  border-radius: 10px;
  color: var(--ink);
  text-decoration: none;
}

.sidebar a:hover,
.sidebar a.active {
  color: #ffffff;
  background: var(--brand);
}

.page-shell.nav-collapsed {
  grid-template-columns: 0 minmax(0, 1fr);
}

.page-shell.nav-collapsed .sidebar {
  width: 0;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
}

main {
  width: 100%;
  max-width: 1120px;
  padding: clamp(30px, 5vw, 70px);
}

.hero,
.page-intro {
  max-width: 900px;
  margin-bottom: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand-dark);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.15;
}

h1 {
  max-width: 900px;
  margin: 0 0 18px;
  font-size: clamp(2.1rem, 5vw, 4.5rem);
  letter-spacing: -0.045em;
}

h2 {
  margin-top: 0;
}

.lead {
  max-width: 850px;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  line-height: 1.7;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 18px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  color: #ffffff;
  background: var(--brand);
}

.button.secondary {
  color: var(--brand-dark);
  border: 1px solid var(--brand);
  background: #ffffff;
}

.feature-grid,
.download-grid,
.cli-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.panel,
.faq-list details {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel p,
.panel li,
.faq-list p {
  color: var(--muted);
  line-height: 1.65;
}

.panel.wide {
  max-width: 920px;
  margin-top: 18px;
}

.badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 5px 9px;
  border-radius: 999px;
  color: #4b3500;
  background: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
}

.badge.muted {
  color: var(--brand-dark);
  background: #dff4f5;
}

.hash {
  display: block;
  margin-top: 18px;
  padding: 12px;
  overflow-wrap: anywhere;
  border-radius: 10px;
  color: #c8f4f6;
  background: #0b2d34;
  font-size: 0.78rem;
}

.steps {
  padding-left: 24px;
}

.steps li {
  margin: 10px 0;
}

.faq-list {
  display: grid;
  max-width: 920px;
  gap: 14px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 750;
}

.cli-list code:not(.hash) {
  display: block;
  overflow-wrap: anywhere;
  color: var(--brand-dark);
}

.legal {
  max-width: 900px;
}

footer {
  padding: 28px clamp(18px, 4vw, 56px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #ffffff;
}

footer p {
  margin: 5px 0;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-shell,
  .page-shell.nav-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    min-height: auto;
    padding: 12px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .page-shell.nav-collapsed .sidebar {
    display: none;
  }

  .sidebar ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  main {
    padding: 34px 20px 50px;
  }

  .feature-grid,
  .download-grid,
  .cli-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 470px) {
  .sidebar ul {
    grid-template-columns: 1fr;
  }

  .brand img {
    width: 52px;
    height: 52px;
  }
}