/* Palette from assets/icon.svg: bunker green-black, concrete, lamp amber. */
:root {
  --bg: #101614;
  --panel: #18211f;
  --panel-edge: #2a3532;
  --text: #d7dbc9;
  --muted: #8f978a;
  --concrete: #c6cbb6;
  --amber: #ce8e41;
  --amber-hot: #e6a65a;
  --radius: 6px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 64px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--amber); }
a:hover { color: var(--amber-hot); }

code {
  font: 0.9em ui-monospace, "Cascadia Mono", Consolas, monospace;
  background: #0b0f0e;
  border: 1px solid var(--panel-edge);
  border-radius: 3px;
  padding: 0.05em 0.35em;
  overflow-wrap: anywhere;
}

h1, h2, h3 { color: var(--concrete); letter-spacing: 0.04em; line-height: 1.2; }
h2 {
  font-size: 1.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 1rem;
}
h2::before { content: ""; display: inline-block; width: 0.6em; height: 0.6em; background: var(--amber); margin-right: 0.5em; vertical-align: 0.05em; }
h3 { font-size: 1.05rem; margin: 0 0 0.5rem; }

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem max(16px, calc((100% - var(--max)) / 2));
  background: rgba(16, 22, 20, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--panel-edge);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--concrete);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.18em;
  white-space: nowrap;
}
.topbar nav { display: flex; gap: 1.2rem; flex-wrap: wrap; justify-content: flex-end; }
.topbar nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.topbar nav a:hover { color: var(--concrete); }

/* Hero */
.hero {
  min-height: min(82vh, 760px);
  display: flex;
  align-items: flex-end;
  padding: 0 16px 4rem;
  background:
    linear-gradient(180deg, rgba(16, 22, 20, 0.15) 0%, rgba(16, 22, 20, 0.55) 55%, var(--bg) 100%),
    url("assets/hero.jpg") center / cover no-repeat;
}
.hero-inner { width: 100%; max-width: var(--max); margin: 0 auto; }
.eyebrow {
  margin: 0;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.85rem;
}
.hero h1 {
  margin: 0.2rem 0 0.8rem;
  font-size: clamp(2.6rem, 9vw, 5.5rem);
  letter-spacing: 0.22em;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.8);
}
.tagline { max-width: 36rem; font-size: 1.15rem; margin: 0 0 1.6rem; text-shadow: 0 1px 8px rgba(0, 0, 0, 0.9); }
.hero-note { color: var(--muted); font-size: 0.9rem; margin: 1rem 0 0; }

.button {
  display: inline-block;
  padding: 0.75rem 1.6rem;
  background: var(--amber);
  color: #16120c;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border-radius: var(--radius);
  transition: background 0.15s;
}
.button:hover { background: var(--amber-hot); color: #16120c; }

/* Sections */
main section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 16px 0;
}
.lead { color: var(--muted); margin-top: -0.4rem; }
.small { color: var(--muted); font-size: 0.9rem; }

.features, .columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.features article, .columns article, .download {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
}
.features p { margin: 0; color: var(--text); }
.columns ol { margin: 0; padding-left: 1.2rem; }
.columns li + li { margin-top: 0.4rem; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.gallery figure { margin: 0; }
.gallery img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--panel-edge);
}

/* Downloads */
.downloads {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1.2rem 0;
}
.download { display: flex; flex-direction: column; gap: 0.6rem; }
.download h3 { margin: 0; font-size: 1.25rem; }
.download .meta { margin: 0; color: var(--muted); font-size: 0.9rem; }
.download .button { text-align: center; }
.download details { font-size: 0.85rem; color: var(--muted); }
.download summary { cursor: pointer; }
.download details code { display: block; margin-top: 0.4rem; padding: 0.4rem; font-size: 0.8rem; }

/* Controls */
.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0.4rem 1.5rem;
  margin: 0;
}
.controls div { display: flex; gap: 0.8rem; border-bottom: 1px solid var(--panel-edge); padding: 0.35rem 0; }
.controls dt { color: var(--amber); font-weight: 600; min-width: 8.5rem; }
.controls dd { margin: 0; }
#install > h3 { margin-top: 2rem; }

.steps, .specs { padding-left: 1.3rem; }
.steps li, .specs li { margin-bottom: 0.6rem; }

footer {
  max-width: var(--max);
  margin: 4rem auto 0;
  padding: 1.5rem 16px 2.5rem;
  border-top: 1px solid var(--panel-edge);
  color: var(--muted);
  font-size: 0.9rem;
}
footer p { margin: 0.3rem 0; }

@media (max-width: 640px) {
  html { scroll-padding-top: 0; }
  .topbar { position: static; flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .topbar nav { justify-content: flex-start; gap: 0.9rem; }
  .hero { min-height: min(70vh, 560px); padding-bottom: 2.5rem; }
  .controls dt { min-width: 7rem; }
}