:root {
  --bg: #0b0d18;
  --text: #f2f3f8;
  --muted: #a3a8bd;
  --line: rgba(255, 255, 255, 0.1);
  --glass: rgba(255, 255, 255, 0.05);
  --glass-shadow: 0 20px 60px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --chip: rgba(255, 255, 255, 0.08);
  --chip-hover: rgba(255, 255, 255, 0.16);
  --well: rgba(0, 0, 0, 0.3);
  --code: #dfe3ff;
  --link: #b9c1ff;
  --nav: rgba(11, 13, 24, 0.7);
  --badge: rgba(92, 107, 250, 0.18);
  --accent-text: linear-gradient(120deg, #c7cdff, #2ec0cc);
  --glow-1: rgba(92, 107, 250, 0.28);
  --glow-2: rgba(167, 139, 250, 0.16);
  --glow-3: rgba(46, 192, 204, 0.12);
  --blue: #5c6bfa;
  --teal: #2ec0cc;
  --violet: #a78bfa;
  --radius: 20px;
  color-scheme: dark;
}

/* Light appearance: follow the system unless the visitor selected dark. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f5f6fb;
    --text: #15172b;
    --muted: #5a5f78;
    --line: rgba(21, 23, 43, 0.1);
    --glass: rgba(255, 255, 255, 0.7);
    --glass-shadow: 0 16px 48px rgba(40, 48, 110, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.9);
    --chip: rgba(21, 23, 43, 0.05);
    --chip-hover: rgba(21, 23, 43, 0.1);
    --well: rgba(255, 255, 255, 0.85);
    --code: #2b2f73;
    --link: #3c4bdc;
    --nav: rgba(245, 246, 251, 0.75);
    --badge: rgba(92, 107, 250, 0.12);
    --accent-text: linear-gradient(120deg, #3c4bdc, #149aa6);
    --glow-1: rgba(92, 107, 250, 0.18);
    --glow-2: rgba(167, 139, 250, 0.14);
    --glow-3: rgba(46, 192, 204, 0.14);
    color-scheme: light;
  }
}

:root[data-theme="light"] {
  --bg: #f5f6fb;
  --text: #15172b;
  --muted: #5a5f78;
  --line: rgba(21, 23, 43, 0.1);
  --glass: rgba(255, 255, 255, 0.7);
  --glass-shadow: 0 16px 48px rgba(40, 48, 110, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --chip: rgba(21, 23, 43, 0.05);
  --chip-hover: rgba(21, 23, 43, 0.1);
  --well: rgba(255, 255, 255, 0.85);
  --code: #2b2f73;
  --link: #3c4bdc;
  --nav: rgba(245, 246, 251, 0.75);
  --badge: rgba(92, 107, 250, 0.12);
  --accent-text: linear-gradient(120deg, #3c4bdc, #149aa6);
  --glow-1: rgba(92, 107, 250, 0.18);
  --glow-2: rgba(167, 139, 250, 0.14);
  --glow-3: rgba(46, 192, 204, 0.14);
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(40rem 30rem at 15% 5%, var(--glow-1), transparent 70%),
    radial-gradient(35rem 30rem at 90% 30%, var(--glow-2), transparent 70%),
    radial-gradient(40rem 30rem at 50% 100%, var(--glow-3), transparent 70%);
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 8px; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.6em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); text-align: center; margin-bottom: 1.2em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

kbd {
  font: 600 0.9em ui-monospace, "SF Mono", Menlo, monospace;
  padding: 0.1em 0.45em;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 7px;
  background: var(--chip);
}

.glass {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: var(--glass-shadow);
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 40px);
  background: var(--nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.1rem; }
.brand:hover { text-decoration: none; }
.brand img { border-radius: 8px; }
.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--text);
  cursor: pointer;
}
.theme-toggle:hover { background: var(--chip-hover); }
.theme-toggle svg { width: 17px; height: 17px; }
.nav nav { display: flex; align-items: center; gap: clamp(12px, 2.5vw, 28px); }
.nav nav a:not(.button) { color: var(--muted); font-size: 0.95rem; }
.nav nav a:not(.button):hover { color: var(--text); text-decoration: none; }

/* Buttons and commands */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8em 1.5em;
  border-radius: 999px;
  font-weight: 650;
  color: var(--text);
  border: 1px solid var(--line);
  background: var(--chip);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.button:hover { text-decoration: none; transform: translateY(-1px); }
.button.primary {
  color: #fff;
  background: linear-gradient(120deg, var(--blue), var(--teal));
  border: none;
  box-shadow: 0 10px 30px rgba(92, 107, 250, 0.35);
}
.button.small { padding: 0.45em 1.1em; font-size: 0.9rem; }

.command {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 10px;
  padding: 6px 6px 6px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--well);
}
.command code { font: 0.92rem ui-monospace, "SF Mono", Menlo, monospace; color: var(--code); white-space: nowrap; overflow-x: auto; min-width: 0; scrollbar-width: none; }
.command .copy { flex: none; }
.copy {
  font: 600 0.85rem inherit;
  font-family: inherit;
  color: var(--text);
  background: var(--chip);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45em 1em;
  cursor: pointer;
}
.copy:hover { background: var(--chip-hover); }

/* Layout */
main { max-width: 1120px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px); }
section { margin: clamp(64px, 10vw, 120px) 0; }

.hero { text-align: center; margin-top: clamp(48px, 8vw, 96px); }
.hero-icon { border-radius: 28px; filter: drop-shadow(0 20px 40px rgba(92, 107, 250, 0.45)); margin-bottom: 24px; }
.lead { font-size: clamp(1.05rem, 2.2vw, 1.3rem); color: var(--muted); max-width: 46rem; margin: 0 auto 2em; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; align-items: center; }
.meta { margin-top: 1.4em; color: var(--muted); font-size: 0.9rem; }

.video { padding: 10px; margin-top: 64px; }
.video video { display: block; width: 100%; height: auto; border-radius: 14px; background: #000; }
.note { text-align: center; color: var(--muted); font-size: 0.85rem; margin: 10px 0 2px; }

.steps ol { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { padding: 28px; }
.num {
  color: #fff;
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-weight: 700;
  margin-bottom: 14px;
  background: linear-gradient(120deg, var(--blue), var(--teal));
}
.steps p, .card p, .details p { color: var(--muted); }

.grid { display: grid; gap: 20px; }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.card { padding: 26px; }
.badge {
  display: inline-block;
  font: 600 0.8rem ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--code);
  padding: 0.25em 0.7em;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--badge);
  margin-bottom: 14px;
}
.card ul { list-style: none; padding: 0; margin: 0 0 12px; }
.card li { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.card li:last-child { border-bottom: none; }
.card li span { color: var(--muted); font-size: 0.9rem; text-align: right; }
.small { font-size: 0.85rem; color: var(--muted); }

.details { text-align: left; }
.details h3 { background: var(--accent-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

.cta { text-align: center; padding: clamp(32px, 6vw, 56px) 24px; }
.cta h2 { margin-bottom: 0.8em; }
.cta .small { margin: 1.6em auto 0; max-width: 40rem; }

footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px clamp(16px, 4vw, 32px) 48px;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
}
footer .small { max-width: 46rem; margin: 0 auto; }

@media (max-width: 900px) {
  .grid.four { grid-template-columns: repeat(2, 1fr); }
  .grid.three, .steps ol { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .grid.four { grid-template-columns: 1fr; }
  .nav nav a:not(.button) { display: none; }
  .command code { font-size: 0.78rem; }
  .actions { flex-direction: column; }
  .card li { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}