:root {
  --bg: #0a0f12;
  --bg2: #10181d;
  --panel: #141f26;
  --line: #243540;
  --text: #dbe6ea;
  --dim: #8ea3ad;
  --amber: #ffb02e;
  --amber-d: #c98200;
  --green: #5be3a4;
  --red: #ff6b5b;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 var(--sans);
  background-image: radial-gradient(1100px 500px at 75% -120px, rgba(255,176,46,.13), transparent 70%),
                    radial-gradient(800px 500px at -10% 30%, rgba(91,227,164,.06), transparent 70%);
  background-repeat: no-repeat;
}
a { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
code, kbd { font-family: var(--mono); font-size: .9em; }
code { background: var(--bg2); border: 1px solid var(--line); border-radius: 4px; padding: 1px 6px; }
kbd { background: var(--panel); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px; padding: 0 6px; }
pre { background: #05090b; border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; overflow-x: auto; font: 14px/1.5 var(--mono); }
pre code { background: none; border: 0; padding: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* top bar */
header.top { position: sticky; top: 0; z-index: 10; background: rgba(10,15,18,.88); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 22px; height: 58px; }
.brand { font: 700 22px var(--mono); color: var(--text); letter-spacing: .5px; }
.brand b { color: var(--amber); }
.brand:hover { text-decoration: none; }
nav { display: flex; gap: 18px; margin-left: auto; align-items: center; font-size: 15px; }
nav a { color: var(--dim); }
nav a:hover, nav a.on { color: var(--text); text-decoration: none; }
.btn { display: inline-block; background: var(--amber); color: #1a1100; font-weight: 700; padding: 11px 22px; border-radius: 6px; border: 1px solid var(--amber); box-shadow: 0 0 24px rgba(255,176,46,.25); }
.btn:hover { background: #ffc255; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line); box-shadow: none; }
.btn.ghost:hover { border-color: var(--dim); background: var(--panel); }
nav .btn { padding: 6px 14px; font-size: 14px; box-shadow: none; color: #1a1100; }

/* hero */
.hero { padding: 64px 0 32px; text-align: center; }
.readout { display: inline-block; font: 600 15px var(--mono); color: var(--amber); background: #05090b; border: 1px solid var(--line); border-radius: 6px; padding: 5px 14px; letter-spacing: 2px; text-shadow: 0 0 10px rgba(255,176,46,.6); }
.hero h1 { font-size: clamp(34px, 6vw, 62px); line-height: 1.08; margin: 22px auto 16px; max-width: 16em; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; color: var(--amber); }
.hero p.lead { font-size: 20px; color: var(--dim); max-width: 40em; margin: 0 auto 28px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.sub { color: var(--dim); font: 13px var(--mono); margin-top: 14px; }

.shot { margin: 44px auto 0; max-width: 1060px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--panel);
  box-shadow: 0 30px 80px rgba(0,0,0,.6), 0 0 0 1px rgba(255,176,46,.08), 0 0 90px rgba(255,176,46,.10); }
.shot .bar { display: flex; align-items: center; gap: 7px; padding: 8px 12px; border-bottom: 1px solid var(--line); background: #0c1318; font: 12px var(--mono); color: var(--dim); }
.shot .bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.shot .bar span { margin-left: 8px; }
.shot figcaption { padding: 10px 14px; font-size: 14px; color: var(--dim); border-top: 1px solid var(--line); }

/* band strip */
.bands { margin: 56px 0 8px; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; font: 13px var(--mono); }
.bands span { border: 1px solid var(--line); background: var(--bg2); color: var(--dim); padding: 3px 10px; border-radius: 4px; }
.bands span.hot { color: var(--amber); border-color: var(--amber-d); }

/* sections */
section { padding: 64px 0; }
section.alt { background: linear-gradient(180deg, var(--bg2), transparent); border-top: 1px solid var(--line); }
h2 { font-size: clamp(26px, 4vw, 38px); margin: 0 0 8px; letter-spacing: -.3px; }
h2 small { display: block; font: 600 13px var(--mono); color: var(--amber); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 8px; }
.intro { color: var(--dim); max-width: 44em; margin: 0 0 36px; font-size: 18px; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 20px 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card h3::before { content: "> "; color: var(--amber); font-family: var(--mono); }
.card p { margin: 0; color: var(--dim); font-size: 15.5px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-top: 8px; }
.stat { border: 1px solid var(--line); border-radius: 8px; background: #05090b; padding: 18px; }
.stat b { display: block; font: 700 32px var(--mono); color: var(--amber); text-shadow: 0 0 14px rgba(255,176,46,.45); }
.stat span { color: var(--dim); font-size: 14px; }

.feature { display: grid; grid-template-columns: 1fr 1.25fr; gap: 36px; align-items: center; margin: 56px 0; }
.feature.flip { grid-template-columns: 1.25fr 1fr; }
.feature.flip .text { order: 2; }
.feature h3 { font-size: 26px; margin: 0 0 10px; }
.feature p { color: var(--dim); margin: 0 0 12px; }
.feature ul { color: var(--dim); padding-left: 20px; margin: 0; }
.feature .tag { font: 600 12px var(--mono); color: var(--amber); letter-spacing: 2px; text-transform: uppercase; }
.feature .pic { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--panel); box-shadow: 0 18px 50px rgba(0,0,0,.5); }

.integr { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.integr span { font: 14px var(--mono); border: 1px solid var(--line); background: var(--bg2); padding: 5px 12px; border-radius: 4px; }

.note { border-left: 3px solid var(--amber); background: var(--panel); padding: 14px 18px; border-radius: 0 8px 8px 0; color: var(--text); }
.note.warn { border-color: var(--red); }

/* download table */
.dl { width: 100%; border-collapse: collapse; margin: 12px 0 0; }
.dl th, .dl td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.dl th { font: 12px var(--mono); letter-spacing: 1.5px; color: var(--dim); text-transform: uppercase; }
.dl td:first-child { white-space: nowrap; font-weight: 700; }

/* guide */
.guide { display: grid; grid-template-columns: 220px 1fr; gap: 48px; padding: 48px 0 72px; }
.toc { margin-left: 0; align-items: flex-start; position: sticky; top: 80px; align-self: start; font-size: 15px; display: flex; flex-direction: column; gap: 6px; border-left: 1px solid var(--line); padding-left: 14px; }
.toc a { color: var(--dim); }
.toc a:hover { color: var(--amber); text-decoration: none; }
.guide article { min-width: 0; max-width: 760px; }
.guide h1 { font-size: 40px; margin: 0 0 8px; }
.guide h2 { font-size: 28px; margin: 52px 0 10px; padding-top: 8px; border-top: 1px solid var(--line); }
.guide h3 { font-size: 19px; margin: 26px 0 6px; }
.guide li { margin: 4px 0; }
.guide .step { counter-increment: s; }
.guide figure { margin: 18px 0; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--panel); }
.guide figcaption { padding: 8px 12px; font-size: 14px; color: var(--dim); border-top: 1px solid var(--line); }

footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--dim); font-size: 14.5px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 40px; justify-content: space-between; }
footer .sig { font-family: var(--mono); color: var(--amber); letter-spacing: 2px; }

@media (max-width: 860px) {
  .feature, .feature.flip { grid-template-columns: 1fr; gap: 20px; margin: 40px 0; }
  .feature.flip .text { order: 0; }
  .guide { grid-template-columns: 1fr; gap: 0; }
  .toc { position: static; flex-direction: row; flex-wrap: wrap; gap: 4px 14px; border: 0; padding: 0 0 12px; }
  nav a.opt { display: none; }
  .dl, .dl tbody, .dl tr, .dl td { display: block; }
  .dl thead { display: none; }
  .dl td { border: 0; padding: 2px 0; }
  .dl tr { border-bottom: 1px solid var(--line); padding: 12px 0; }
  .dl td:first-child { white-space: normal; }
  body { font-size: 16px; }
  section { padding: 44px 0; }
}
@media (prefers-reduced-motion: no-preference) {
  .readout { animation: glow 3s ease-in-out infinite alternate; }
  @keyframes glow { from { text-shadow: 0 0 6px rgba(255,176,46,.4); } to { text-shadow: 0 0 14px rgba(255,176,46,.9); } }
}