/* N2K Toolbox — site styles. Dark "diagnostic instrument" theme, cyan accent. */
@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

:root {
  --bg:        #070d11;
  --panel:     #0c1a22;
  --panel-2:   #0f2430;
  --line:      #173642;
  --text:      #eaf4f7;
  --text-dim:  #7a94a0;
  --accent:    #1fd6e6;   /* cyan — the "test gear" accent */
  --accent-ink:#03171b;   /* text on accent fills */
  --ok:        #13c27a;
  --warn:      #ffd040;
  --red:       #ff5a5a;
  --maxw:      1080px;
  --mono: 'Share Tech Mono', ui-monospace, "Cascadia Mono", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--text);
  font-family: var(--sans); font-size: 16px; line-height: 1.6;
  scroll-behavior: smooth;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.label {
  font-family: var(--mono); font-size: .72rem; letter-spacing: 2px;
  text-transform: uppercase; color: var(--text-dim);
}
.accent { color: var(--accent); }

/* ---- buttons ---- */
.btn {
  display: inline-block; font-weight: 700; font-size: .95rem;
  padding: 11px 20px; border-radius: 7px; border: 1px solid transparent;
  cursor: pointer; transition: transform .08s ease, background .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-ghost   { background: transparent; color: var(--accent); border-color: var(--accent); }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7,13,17,.9); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none; }
.brand .accent { color: var(--accent); }
.nav-links a { color: var(--text-dim); margin-left: 22px; font-size: .9rem; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }
@media (max-width: 680px) { .nav-links { display: none; } }

/* ---- hero ---- */
.hero {
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(var(--panel) 1px, transparent 1px),
    linear-gradient(90deg, var(--panel) 1px, transparent 1px);
  background-size: 22px 22px;
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px;
  align-items: center; padding: 72px 0;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; }
.hero p.sub { color: var(--text-dim); font-size: 1.15rem; max-width: 30ch; }
.hero-cta { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-shot {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); font-family: var(--mono); text-align: center; overflow: hidden;
}
.hero-shot img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; gap: 28px; padding: 48px 0; }
  .hero p.sub { max-width: none; }
}

/* ---- generic section ---- */
.section { padding: 64px 0; border-bottom: 1px solid var(--line); }
.section .label { display: block; margin-bottom: 10px; }
.section h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
.section .lead { color: var(--text-dim); max-width: 60ch; }

/* ---- modes ---- */
.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 26px; }
.mode-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.mode-card h3 { color: var(--accent); font-family: var(--mono); font-size: 1.05rem; }
.mode-card p { color: var(--text-dim); font-size: .94rem; margin: 0; }
@media (max-width: 820px) { .modes { grid-template-columns: 1fr; } }
.modes-2col { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 820px) { .modes-2col { grid-template-columns: 1fr; } }

/* ---- flow / how it connects ---- */
.flow {
  margin-top: 24px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-family: var(--mono); color: var(--text-dim);
}
.flow .node {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 16px; color: var(--text);
}
.flow .arrow { color: var(--accent); font-weight: 700; }

/* ---- demo placeholder ---- */
.demo-soon {
  margin-top: 22px; text-align: center; padding: 48px 24px;
  border: 1px dashed var(--accent); border-radius: 14px; background: rgba(31,214,230,.04);
}
.demo-soon .tag {
  display: inline-block; font-family: var(--mono); font-size: .72rem; letter-spacing: 2px;
  color: var(--accent-ink); background: var(--accent); padding: 3px 10px; border-radius: 20px;
}
.demo-soon h3 { margin-top: 14px; }
.demo-soon p { color: var(--text-dim); margin: 0; }

/* ---- specs ---- */
.specs { margin-top: 22px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.spec-row { display: flex; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.spec-row:last-child { border-bottom: none; }
.spec-row .k { color: var(--text-dim); font-family: var(--mono); font-size: .85rem; }
.spec-row .v { color: var(--text); }

/* ---- downloads / contact ---- */
.btn-row { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.contact { text-align: center; }
.contact .lead { margin: 0 auto; }

/* ---- footer ---- */
.footer {
  padding: 30px 0; color: var(--text-dim); font-family: var(--mono); font-size: .8rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}

/* ---- manual page ---- */
.doc { max-width: 760px; margin: 0 auto; padding: 48px 22px 80px; }
.doc h1 { font-size: 2rem; }
.doc h2 { font-size: 1.3rem; color: var(--accent); margin-top: 1.8em; border-bottom: 1px solid var(--line); padding-bottom: 6px; }
.doc p, .doc li { color: #cfe0e6; }
.doc code { background: var(--panel-2); border: 1px solid var(--line); padding: 1px 6px; border-radius: 4px; color: var(--accent); font-family: var(--mono); }
.doc .back { font-family: var(--mono); font-size: .85rem; }