:root {
  --bg: #03050a;
  --bg2: #0a1022;
  --panel: #121c34;
  --line: #2c3d66;
  --text: #f2f6ff;
  --dim: #b9c5df;
  --accent: #ffc266;
  --accent2: #86dcff;
  --good: #8cf29a;
  --warn: #ff8f86;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ---- top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 28px;
  padding: 0 28px; height: 60px;
  background: rgba(5, 7, 13, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; letter-spacing: .32em; font-size: 17px; color: #fff; }
.brand:hover { text-decoration: none; }
.brand span { color: var(--accent); }
.topbar nav { display: flex; gap: 22px; margin-left: auto; flex-wrap: wrap; }
.topbar nav a { color: var(--dim); font-size: 14px; font-weight: 600; letter-spacing: .04em; padding: 4px 0; border-bottom: 2px solid transparent; }
.topbar nav a:hover, .topbar nav a.active { color: #fff; text-decoration: none; border-color: var(--accent); }

/* ---- hero ---- */
.hero {
  position: relative; min-height: 86vh;
  display: flex; align-items: flex-end;
  background: #000 center / cover no-repeat;
  border-bottom: 1px solid var(--line);
}
.hero::before { content: none; }
.hero-inner { position: relative; padding: 0 8vw 9vh; max-width: 1100px; }
.hero h1 { font-size: clamp(44px, 8vw, 96px); letter-spacing: .28em; margin: 0 0 6px; font-weight: 800; color: #fff; text-shadow: 0 2px 30px rgba(0,0,0,.7); }
.hero p.lead { font-size: clamp(17px, 2vw, 22px); color: #e8eefc; max-width: 640px; margin: 0 0 28px; text-shadow: 0 1px 12px rgba(0,0,0,.9); }
.btn {
  display: inline-block; padding: 12px 24px; margin: 0 10px 10px 0;
  border-radius: 8px; font-weight: 700; font-size: 15px; letter-spacing: .03em;
  border: 1px solid var(--accent); color: var(--accent); background: rgba(0,0,0,.35);
}
.btn:hover { background: var(--accent); color: #111; text-decoration: none; }
.btn.primary { background: var(--accent); color: #111; }
.btn.primary:hover { background: #ffc980; }

/* ---- sections ---- */
section.block { padding: 84px 8vw; border-bottom: 1px solid var(--line); }
section.block:nth-of-type(even) { background: var(--bg2); }
.wrap { max-width: 1180px; margin: 0 auto; }
h2.title { font-size: 34px; margin: 0 0 8px; color: #fff; letter-spacing: .02em; }
.kicker { color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: .24em; text-transform: uppercase; margin-bottom: 10px; }
.sub { color: var(--dim); max-width: 720px; margin: 0 0 40px; font-size: 18px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.feature { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.feature h3 { margin: 0 0 8px; color: #fff; font-size: 18px; }
.feature p { margin: 0; color: var(--dim); font-size: 15px; }

.split { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: center; margin-bottom: 70px; }
.split.flip { grid-template-columns: 1.15fr 1fr; }
.split.flip .text { order: 2; }
.split h3 { font-size: 28px; margin: 0 0 12px; color: #fff; }
.split p { color: var(--dim); }
.split ul { color: var(--dim); padding-left: 20px; }
.split li { margin: 4px 0; }
@media (max-width: 860px) { .split, .split.flip { grid-template-columns: 1fr; } .split.flip .text { order: 0; } }

figure.shot { margin: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #000; box-shadow: 0 12px 40px rgba(0,0,0,.55); }
figure.shot img { width: 100%; height: auto; display: block; aspect-ratio: auto 16 / 9; cursor: zoom-in; transition: transform .4s; }
figure.shot:hover img { transform: scale(1.015); }
figure.shot figcaption { padding: 10px 14px; font-size: 13px; color: var(--dim); background: var(--panel); border-top: 1px solid var(--line); }

/* gallery */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.filters button { background: var(--panel); color: var(--dim); border: 1px solid var(--line); border-radius: 20px; padding: 6px 16px; font-size: 14px; cursor: pointer; }
.filters button.on, .filters button:hover { color: #111; background: var(--accent); border-color: var(--accent); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 22px; }
.grid figure.shot[hidden] { display: none; }

.strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; text-align: center; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 10px; }
.stat b { display: block; font-size: 30px; color: var(--accent); }
.stat span { font-size: 13px; color: var(--dim); text-transform: uppercase; letter-spacing: .12em; }

footer { padding: 40px 8vw; color: var(--dim); font-size: 14px; text-align: center; }

/* ---- lightbox ---- */
#lightbox { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.94); display: none; align-items: center; justify-content: center; flex-direction: column; cursor: zoom-out; }
#lightbox.open { display: flex; }
#lightbox img { max-width: 94vw; max-height: 86vh; border-radius: 6px; }
#lightbox p { color: var(--dim); margin: 12px 0 0; font-size: 14px; max-width: 80vw; text-align: center; }
#lightbox .lb-nav { position: absolute; top: 50%; transform: translateY(-50%); width: 52px; height: 72px; border: 0; border-radius: 8px; background: rgba(255,255,255,.08); color: #fff; font-size: 44px; line-height: 1; cursor: pointer; }
#lightbox .lb-nav:hover { background: rgba(255,255,255,.2); }
#lightbox .lb-nav[hidden] { display: none; }
#lightbox .lb-prev { left: 12px; }
#lightbox .lb-next { right: 12px; }
@media (max-width: 720px) { #lightbox .lb-nav { width: 40px; height: 56px; font-size: 34px; background: rgba(0,0,0,.45); } }

/* ---- manual layout ---- */
.doc { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 0; max-width: 1400px; margin: 0 auto; }
.toc { position: sticky; top: 60px; align-self: start; height: calc(100vh - 60px); overflow-y: auto; padding: 28px 20px 40px 28px; border-right: 1px solid var(--line); font-size: 14px; }
.toc h4 { margin: 18px 0 6px; font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); }
.toc h4:first-child { margin-top: 0; }
.toc a { display: block; padding: 3px 0 3px 10px; color: #cdd7ee; border-left: 2px solid transparent; }
.toc a:hover { color: #fff; text-decoration: none; }
.toc a.on { color: #fff; border-color: var(--accent); }
article.manual { padding: 48px 5vw 120px; max-width: 920px; }
article.manual h1 { font-size: 42px; margin: 0 0 6px; color: #fff; }
article.manual .byline { color: var(--dim); margin-bottom: 36px; }
article.manual h2 { margin: 64px 0 14px; padding-top: 10px; font-size: 28px; color: #fff; border-top: 1px solid var(--line); }
article.manual h3 { margin: 34px 0 8px; font-size: 20px; color: var(--accent); }
article.manual h4 { margin: 22px 0 6px; font-size: 16px; color: #fff; }
article.manual p, article.manual li { color: #e6edfb; }
article.manual code { font-family: var(--mono); font-size: .9em; background: #1b2748; padding: 1px 6px; border-radius: 4px; color: #ffe2b0; }
article.manual pre { background: #060b19; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; overflow-x: auto; line-height: 1.5; }
article.manual pre code { background: none; padding: 0; color: #e4f0ff; font-size: 13.5px; }
article.manual table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 15px; }
article.manual th, article.manual td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
article.manual th { color: var(--accent); background: rgba(255,255,255,.03); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
kbd { font-family: var(--mono); font-size: .85em; background: #24315a; border: 1px solid #4a5d94; border-bottom-width: 2px; border-radius: 5px; padding: 1px 7px; color: #fff; white-space: nowrap; }
.note, .tip, .warn { border-left: 4px solid; padding: 12px 18px; border-radius: 0 8px 8px 0; margin: 20px 0; background: var(--panel); }
.note { border-color: var(--accent2); }
.tip { border-color: var(--good); }
.warn { border-color: var(--warn); }
.note p, .tip p, .warn p { margin: 0; }
article.manual figure.shot { margin: 26px 0; }
@media (max-width: 960px) {
  .doc { grid-template-columns: minmax(0, 1fr); }
  .toc { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
}

/* ---- phones and small tablets ---- */
html, body { overflow-x: hidden; }
.toc-toggle { display: none; }
@media (max-width: 960px) {
  .toc-toggle {
    display: block; width: 100%; padding: 12px 20px; text-align: left; cursor: pointer;
    background: var(--panel); color: var(--accent); border: 0; border-bottom: 1px solid var(--line);
    font: 700 14px/1 system-ui, sans-serif; letter-spacing: .12em; text-transform: uppercase;
  }
  .toc { display: none; padding: 16px 20px 24px; max-height: 60vh; overflow-y: auto; }
  .toc.open { display: block; }
  .toc a { padding: 7px 0 7px 10px; }
}
@media (max-width: 720px) {
  .topbar { height: auto; min-height: 52px; padding: 8px 14px; gap: 10px 16px; flex-wrap: wrap; position: static; }
  .brand { font-size: 15px; letter-spacing: .26em; }
  .topbar nav { margin-left: 0; width: 100%; gap: 4px 16px; }
  .topbar nav a { font-size: 13px; padding: 6px 0; }
  html { scroll-padding-top: 12px; }
  .hero { min-height: 70vh; }
  .hero-inner { padding: 0 6vw 7vh; }
  .hero h1 { letter-spacing: .16em; }
  .btn { padding: 11px 18px; }
  section.block { padding: 48px 6vw; }
  h2.title { font-size: 26px; }
  .sub { font-size: 16px; margin-bottom: 28px; }
  .split { gap: 22px; margin-bottom: 44px; }
  .split h3 { font-size: 22px; }
  .features { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
  article.manual { padding: 28px 18px 80px; }
  article.manual h1 { font-size: 30px; }
  article.manual h2 { font-size: 23px; margin-top: 44px; }
  article.manual h3 { font-size: 18px; }
  article.manual table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; font-size: 14px; }
  article.manual th, article.manual td { padding: 7px 9px; }
  article.manual pre { padding: 12px; margin-left: -4px; margin-right: -4px; }
  article.manual pre code { font-size: 12.5px; }
  article.manual code { overflow-wrap: anywhere; }
  kbd { white-space: normal; }
  footer { padding: 28px 6vw; }
}