:root {
  --blue: #2563eb;
  --blue-bright: #4f93ff;
  --blue-deep: #1e3a8a;
  --sky: #93c5fd;
  --amber: #f59e0b;
  --green: #61c554;
  --bg: #fbfcfe;
  --bg-grad: radial-gradient(1100px 520px at 78% -10%, rgba(37, 99, 235, .10), transparent 60%);
  --panel: #ffffff;
  --ink: #0b1020;
  --muted: #566381;
  --line: #e3eaf5;
  --accent: var(--blue);
  --glow: 0 40px 110px -55px rgba(37, 99, 235, .45);
  --nav-bg: rgba(251, 252, 254, .72);
}

[data-theme="dark"] {
  --bg: #080b14;
  --bg-grad: radial-gradient(1100px 540px at 78% -8%, rgba(79, 147, 255, .16), transparent 60%);
  --panel: #0e1424;
  --ink: #eaf0fb;
  --muted: #8595b8;
  --line: #1b2540;
  --accent: var(--blue-bright);
  --glow: 0 44px 130px -55px rgba(79, 147, 255, .55);
  --nav-bg: rgba(8, 11, 20, .68);
}

html {
  scroll-behavior: smooth;
}

.guide-page *,
.guide-page *::before,
.guide-page *::after {
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--bg);
  background-image: var(--bg-grad);
  background-repeat: no-repeat;
  font-family: "DM Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.mono,
code,
kbd {
  font-family: "JetBrains Mono", "SF Mono", monospace;
}

.wrap {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding-right: 32px;
  padding-left: 32px;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  max-width: 1140px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 26px;
  height: 26px;
  border-radius: 6px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-links {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 13.5px;
}

.nav-links a {
  text-decoration: none;
  transition: color .15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
}

.theme-btn {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  color: var(--muted);
  background: none;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.theme-btn:hover {
  color: var(--ink);
}

.nav-dl {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px;
  text-decoration: none;
}

.nav-dl:hover {
  border-color: var(--accent);
}

.g-head {
  padding: 64px 0 30px;
}

.g-head .sec-label {
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.g-head h1 {
  margin: 10px 0 14px;
  font-size: 44px;
  font-weight: 700;
  line-height: 1.08;
}

.g-head p {
  max-width: 60ch;
  color: var(--muted);
  font-size: 17px;
}

.guide-container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding-right: 32px;
  padding-left: 32px;
}

.guide-layout {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 56px;
  align-items: start;
}

.guide-content {
  min-width: 0;
}

.toc {
  position: sticky;
  top: 78px;
  align-self: start;
}

.toc h2 {
  margin: 0 0 14px;
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.toc ol {
  margin: 0;
  padding: 0;
  counter-reset: t;
  list-style: none;
}

.toc li {
  margin-bottom: 11px;
  counter-increment: t;
  font-size: 14px;
  line-height: 1.35;
}

.toc li::before {
  content: counter(t, decimal-leading-zero) " ";
  margin-right: 8px;
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
}

.toc a {
  color: var(--muted);
  text-decoration: none;
  transition: color .15s;
}

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

section.g {
  padding: 30px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 76px;
}

section.g:first-of-type {
  border-top: 0;
}

section.g h2 {
  margin: 0 0 6px;
  font-size: 25px;
  font-weight: 700;
}

section.g h2 a {
  margin-left: 8px;
  color: var(--muted);
  font-size: 18px;
  font-weight: 400;
  text-decoration: none;
  opacity: 0;
}

section.g h2:hover a {
  opacity: 1;
}

section.g > p {
  margin: 10px 0;
  color: var(--muted);
  font-size: 16px;
}

section.g ul {
  margin: 14px 0;
  padding: 0;
  list-style: none;
}

section.g li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 20px;
  color: var(--muted);
  font-size: 15.5px;
}

section.g li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 2px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

section.g li strong,
section.g p strong {
  color: var(--ink);
  font-weight: 600;
}

section.g code,
.kbd-table code {
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--accent);
  background: var(--panel);
  font-size: 13px;
}

.guide-page .shot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 22px 0 8px;
}

.guide-page .shot-grid .shot {
  width: auto;
  min-width: 0;
  margin: 0;
}

figure.shot {
  margin: 22px 0 6px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 13px;
  box-shadow: var(--glow);
}

figure.shot img {
  display: block;
  width: 100%;
  border: 0;
  border-radius: 0;
}

figure.shot figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--panel);
  font-size: 13px;
}

.kbd-table {
  width: 100%;
  margin-top: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-collapse: collapse;
  border-radius: 12px;
}

.kbd-table td {
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
}

.kbd-table tr:first-child td {
  border-top: 0;
}

.kbd-table td:first-child {
  width: 42%;
}

.kbd-table kbd {
  color: var(--accent);
  font-size: 12.5px;
}

.backtop {
  display: inline-block;
  margin: 30px 0 0;
  color: var(--accent);
  font-size: 14.5px;
  text-decoration: none;
}

.backtop:hover {
  text-decoration: underline;
}

footer {
  margin-top: 40px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.foot {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  max-width: 1140px;
}

.foot .spons {
  color: var(--muted);
  font-size: 14px;
}

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

.foot-links {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.foot-links a {
  text-decoration: none;
}

@media (max-width: 860px) {
  .guide-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .toc {
    position: static;
    margin-bottom: 24px;
    padding: 22px 26px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--panel);
  }

  .toc ol {
    columns: 2;
    column-gap: 36px;
  }

  .toc li {
    break-inside: avoid;
  }
}

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

@media (max-width: 600px) {
  .wrap,
  .guide-container {
    padding-right: 20px;
    padding-left: 20px;
  }

  .g-head {
    padding-top: 44px;
  }

  .g-head h1 {
    font-size: 34px;
  }

  section.g h2 {
    font-size: 22px;
  }

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

  .kbd-table td {
    padding: 11px 14px;
    font-size: 13.5px;
  }
}