:root {
  color-scheme: dark;
  --bg: #070b12;
  --surface: #111823;
  --surface-2: #172131;
  --text: #edf4ff;
  --muted: #93a3bb;
  --line: #253247;
  --accent: #5cc8ff;
  --accent-2: #36dec0;
  --warning: #d58600;
  --danger: #d93d4f;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 0, rgba(92, 200, 255, 0.16), transparent 32rem),
    linear-gradient(180deg, #0b1320 0, rgba(7, 11, 18, 0) 360px),
    var(--bg);
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button,
input {
  font: inherit;
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 306px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  border-right: 1px solid var(--line);
  background: rgba(11, 16, 24, 0.9);
  padding: 22px 16px;
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 6px 18px;
}

.mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-weight: 900;
  letter-spacing: 0;
  box-shadow: 0 10px 24px rgba(15, 123, 255, 0.22);
}

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

.brand strong {
  font-size: 17px;
}

.brand small,
.muted,
.eyebrow {
  color: var(--muted);
}

.support-card {
  display: grid;
  gap: 5px;
  margin: 0 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background:
    linear-gradient(135deg, rgba(92, 200, 255, 0.13), rgba(54, 222, 192, 0.08)),
    var(--surface);
}

.support-card span {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.support-card strong {
  font-size: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.search {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.search input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 13px;
  background: var(--surface);
  color: var(--text);
  outline: none;
}

.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(15, 123, 255, 0.12);
}

nav {
  display: grid;
  gap: 6px;
}

.nav-item {
  display: block;
  border-radius: 8px;
  padding: 10px 12px;
  color: #a6b4c8;
}

.nav-item:hover,
.nav-item.active {
  background: #152033;
  color: #ffffff;
  text-decoration: none;
}

.nav-item.active {
  font-weight: 700;
}

.main {
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 18px;
  justify-content: space-between;
  min-height: 88px;
  padding: 18px clamp(18px, 5vw, 58px);
  border-bottom: 1px solid rgba(37, 50, 71, 0.92);
  background: rgba(7, 11, 18, 0.82);
  backdrop-filter: blur(16px);
}

.topbar h1 {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  letter-spacing: 0;
}

.content {
  width: min(930px, calc(100vw - 370px));
  margin: 30px auto 72px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(24px, 4vw, 44px);
  background: rgba(13, 19, 29, 0.92);
  box-shadow: var(--shadow);
  line-height: 1.72;
}

.content h1,
.content h2,
.content h3 {
  color: #f4f8ff;
  line-height: 1.2;
  margin: 34px 0 14px;
  letter-spacing: 0;
}

.content h1:first-child,
.content h2:first-child,
.content h3:first-child {
  margin-top: 0;
}

.content h1 {
  font-size: 38px;
}

.content h2 {
  padding-top: 12px;
  font-size: 26px;
}

.content h3 {
  font-size: 20px;
}

.content p,
.content ul,
.content ol {
  color: #d5e0ef;
}

.content li {
  margin: 6px 0;
}

.content code {
  border: 1px solid #26364d;
  border-radius: 6px;
  padding: 2px 6px;
  background: #0c1420;
  color: #8ed7ff;
}

.content img {
  display: block;
  max-width: min(100%, 780px);
  height: auto;
  margin: 20px auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #080d15;
  box-shadow: 0 16px 44px rgba(27, 39, 55, 0.16);
  cursor: zoom-in;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.guide-grid a {
  display: grid;
  gap: 8px;
  min-height: 172px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background:
    linear-gradient(180deg, rgba(92, 200, 255, 0.08), rgba(54, 222, 192, 0.03)),
    #111a28;
  color: var(--text);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.24);
}

.guide-grid a:hover {
  border-color: rgba(92, 200, 255, 0.6);
  text-decoration: none;
  transform: translateY(-1px);
}

.guide-grid span {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.guide-grid strong {
  font-size: 18px;
}

.guide-grid small {
  color: var(--muted);
  line-height: 1.5;
}

.content hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 30px 0;
}

.hint {
  border: 1px solid #28456b;
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 18px 0;
  background: #101b2b;
}

.hint.warning {
  border-color: #6b4c14;
  border-left-color: var(--warning);
  background: #221b0d;
}

.hint.danger {
  border-color: #6e2937;
  border-left-color: var(--danger);
  background: #24121a;
}

.secondary,
.icon-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.secondary {
  padding: 10px 14px;
  color: #dce8f8;
}

.icon-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
}

.icon-button span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 54px 22px 22px;
  background: rgba(9, 14, 22, 0.86);
}

.lightbox img {
  max-width: 96vw;
  max-height: 86vh;
  border-radius: 8px;
}

.lightbox button {
  position: fixed;
  top: 16px;
  right: 16px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  padding: 9px 13px;
  background: #ffffff;
  color: #17202e;
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 10;
    width: min(320px, 86vw);
    transform: translateX(-100%);
    transition: transform 180ms ease;
    box-shadow: var(--shadow);
  }

  body.menu-open .sidebar {
    transform: translateX(0);
  }

  .icon-button {
    display: block;
    flex: 0 0 auto;
  }

  .content {
    width: auto;
    margin: 18px 14px 54px;
    padding: 24px 18px;
  }

  .content h1 {
    font-size: 30px;
  }

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

  .topbar {
    align-items: flex-start;
    padding: 14px 16px;
  }

  .secondary {
    display: none;
  }
}
  color: #f4f8ff;