/* WYMMS-1 product site — technical-document aesthetic */
:root {
  --paper: #f3f4f1;
  --paper-2: #e9ebe6;
  --ink: #0d1a2b;
  --ink-2: #2a3a4f;
  --ink-3: #5c6b7d;
  --rule: #c9cfc9;
  --blue: #16324f;
  --blue-2: #1f4a75;
  --amber: #f2a900;
  --amber-ink: #6b4a00;
  --green: #2f8f4e;
  --red: #c8321e;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --sans: "IBM Plex Sans", "Helvetica Neue", Helvetica, sans-serif;
  --maxw: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.01em; line-height: 1.15; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.6vw, 3.6rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.mono { font-family: var(--mono); }
.eyebrow {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: .6rem; display: block;
}
.eyebrow b { color: var(--amber-ink); font-weight: 600; }

/* top bar */
.topbar {
  background: var(--ink); color: #cfd6df; font-family: var(--mono); font-size: .72rem;
  letter-spacing: .06em; padding: 6px 0;
}
.topbar .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.topbar span b { color: var(--amber); font-weight: 600; }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 20; background: rgba(243,244,241,.92);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--rule);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand svg { height: 34px; width: auto; }
.brand .for {
  font-family: var(--mono); font-size: .68rem; color: var(--ink-3); letter-spacing: .08em;
  border-left: 1px solid var(--rule); padding-left: 12px; line-height: 1.3;
}
.brand .for b { display: block; color: var(--ink); font-weight: 600; font-size: .78rem; letter-spacing: .04em; }
.nav ul { list-style: none; display: flex; gap: 22px; margin: 0; padding: 0; }
.nav li a { font-size: .9rem; color: var(--ink-2); }
.nav li a.cta {
  background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 3px; font-family: var(--mono);
  font-size: .78rem; letter-spacing: .04em;
}
.nav li a.cta:hover { background: var(--blue-2); text-decoration: none; }
@media (max-width: 860px) { .nav ul li:not(:last-child) { display: none; } .brand .for { display: none; } }

/* hero */
.hero {
  position: relative; overflow: hidden; border-bottom: 1px solid var(--rule);
  background:
    linear-gradient(90deg, rgba(22,50,79,.07) 1px, transparent 1px) 0 0/40px 40px,
    linear-gradient(0deg, rgba(22,50,79,.07) 1px, transparent 1px) 0 0/40px 40px,
    radial-gradient(1200px 500px at 80% 0%, #fff 0%, var(--paper) 70%);
}
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; padding-top: 72px; padding-bottom: 72px; }
.hero h1 span { color: var(--blue-2); }
.hero .lede { font-size: 1.15rem; color: var(--ink-2); max-width: 46ch; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.btn {
  display: inline-block; padding: 12px 18px; border-radius: 3px; font-family: var(--mono);
  font-size: .82rem; letter-spacing: .05em; border: 1px solid var(--ink); color: var(--ink);
}
.btn:hover { text-decoration: none; background: #fff; }
.btn.primary { background: var(--ink); color: #fff; }
.btn.primary:hover { background: var(--blue-2); border-color: var(--blue-2); }
.hero .stamps { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 30px; }
.stamp { font-family: var(--mono); font-size: .7rem; letter-spacing: .08em; color: var(--ink-3); }
.stamp b { display: block; color: var(--ink); font-size: 1rem; letter-spacing: 0; font-weight: 600; }
.hero-art { position: relative; }
.hero-art figcaption {
  font-family: var(--mono); font-size: .68rem; color: var(--ink-3); letter-spacing: .06em;
  margin-top: 10px; display: flex; justify-content: space-between;
}
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; padding-top: 44px; padding-bottom: 44px; } }

/* sections */
section { padding: 72px 0; border-bottom: 1px solid var(--rule); }
section.alt { background: var(--paper-2); }
.sec-head { display: grid; grid-template-columns: 1fr 2fr; gap: 32px; margin-bottom: 36px; }
.sec-head p { color: var(--ink-2); max-width: 60ch; margin: 0; }
@media (max-width: 860px) { .sec-head { grid-template-columns: 1fr; gap: 10px; } }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 860px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }
.card { background: #fff; border: 1px solid var(--rule); border-radius: 4px; padding: 22px; }
.card .num { font-family: var(--mono); font-size: .7rem; color: var(--amber-ink); letter-spacing: .1em; }
.card h3 { margin-top: 6px; }
.card p { color: var(--ink-2); font-size: .95rem; margin: 0; }

/* how it works */
.flow { background: #fff; border: 1px solid var(--rule); border-radius: 4px; padding: 26px; }
.flow svg { width: 100%; height: auto; display: block; }
.legend { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 20px; }
.legend div { font-size: .85rem; color: var(--ink-2); border-top: 2px solid var(--ink); padding-top: 8px; }
.legend div b { display: block; font-family: var(--mono); font-size: .72rem; letter-spacing: .08em; color: var(--ink); }
@media (max-width: 860px) { .legend { grid-template-columns: 1fr 1fr; } }

/* spec tables */
table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--rule); font-size: .92rem; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; background: var(--paper-2); }
td:first-child { color: var(--ink-2); width: 42%; }
td .pn { font-family: var(--mono); font-size: .85rem; }
tr:last-child td { border-bottom: 0; }
.tbl-title { font-family: var(--mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); margin: 0 0 8px; }

/* compatibility */
.compat li { margin-bottom: 6px; }
.badge { display: inline-block; font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; padding: 2px 7px; border-radius: 2px; border: 1px solid var(--rule); color: var(--ink-3); margin-left: 6px; vertical-align: middle; }
.badge.ok { border-color: var(--green); color: var(--green); }
.badge.pend { border-color: var(--amber); color: var(--amber-ink); }

/* install steps */
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 32px; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 44px 1fr; gap: 12px; padding: 14px 0; border-top: 1px solid var(--rule); }
.steps li::before { content: counter(s, decimal-leading-zero); font-family: var(--mono); font-size: 1.2rem; color: var(--blue-2); }
.steps li b { display: block; }
.steps li span { color: var(--ink-2); font-size: .92rem; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* checklist callout */
.cl-callout { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
.cl-preview { background: #fff; border: 1px solid var(--rule); border-radius: 4px; padding: 20px 24px; font-family: var(--mono); font-size: .78rem; box-shadow: 0 20px 40px -30px rgba(13,26,43,.5); }
.cl-preview .hd { display: flex; justify-content: space-between; border-bottom: 2px solid var(--ink); padding-bottom: 6px; margin-bottom: 10px; font-weight: 600; letter-spacing: .06em; }
.cl-preview .row { display: flex; justify-content: space-between; padding: 3px 0; border-bottom: 1px dotted var(--rule); }
.cl-preview .row em { font-style: normal; font-weight: 600; }
.cl-preview .more { color: var(--ink-3); padding-top: 8px; }
@media (max-width: 860px) { .cl-callout { grid-template-columns: 1fr; } }

/* notes */
.note { border-left: 3px solid var(--amber); background: #fff; padding: 12px 16px; font-size: .9rem; color: var(--ink-2); }
.note b { font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; color: var(--amber-ink); }

/* footer */
footer { padding: 40px 0 60px; color: var(--ink-3); font-size: .82rem; }
footer .wrap { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 28px; }
footer h4 { font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); }
footer ul { list-style: none; padding: 0; margin: 0; }
footer li { margin-bottom: 4px; }
footer .fine { margin-top: 16px; font-size: .74rem; line-height: 1.5; }
@media (max-width: 860px) { footer .wrap { grid-template-columns: 1fr; } }

/* reveal */
.rv { opacity: 0; transform: translateY(14px); animation: rv .7s ease forwards; }
.rv.d1 { animation-delay: .08s } .rv.d2 { animation-delay: .18s } .rv.d3 { animation-delay: .28s } .rv.d4 { animation-delay: .4s }
@keyframes rv { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .rv { animation: none; opacity: 1; transform: none; } }

/* EFIS mock (hero) */
.efis {
  background:#0b0d10; border-radius:10px; padding:14px 16px 12px; border:6px solid #1c1f24; box-shadow: 0 30px 60px -30px rgba(0,0,0,.8), inset 0 0 0 1px #2a2e35;
  font-family: var(--mono); color:#e8ecef; font-size:.72rem; letter-spacing:.04em;
}
.efis-top { display:flex; justify-content:space-between; color:#9aa4ad; font-size:.62rem; border-bottom:1px solid #2a2e35; padding-bottom:6px; margin-bottom:10px; }
.efis-time { color:#e8ecef; }
.efis-body { display:grid; grid-template-columns:1fr 1fr; gap:0 22px; }
.efis-row { display:flex; justify-content:space-between; padding:4px 0; border-bottom:1px solid #16191e; }
.efis-row span { color:#9aa4ad; }
.efis-row b { font-weight:600; color:#fff; }
.efis-row b.g { color:#3ddc6b; }
.efis-gauge { padding:2px 0 8px; margin-bottom:4px; border-bottom:1px solid #16191e; }
.efis-gl { color:#9aa4ad; font-size:.62rem; margin-bottom:6px; }
.efis-gl em { font-style:normal; color:#5c6b7d; }
.efis-bar { position:relative; height:12px; background:#1c1f24; border:1px solid #2a2e35; border-radius:2px; overflow:hidden; }
.efis-bar i { position:absolute; top:0; bottom:0; background:#3ddc6b; animation: sway 3.2s ease-in-out infinite; }
.efis-bar u { position:absolute; left:50%; top:0; bottom:0; width:1px; background:#fff; }
.efis-scale { display:flex; justify-content:space-between; color:#5c6b7d; font-size:.56rem; margin-top:3px; }
.efis-val { font-size:1.4rem; font-weight:600; color:#fff; margin-top:4px; }
.efis-keys { display:grid; grid-template-columns:repeat(6,1fr); gap:6px; margin-top:12px; }
.efis-keys span { background:#1c1f24; border:1px solid #2a2e35; border-radius:3px; text-align:center; padding:6px 0; font-size:.6rem; color:#c9d1d9; }
.efis-keys span.on { background:#3ddc6b; color:#0b0d10; font-weight:600; }
@keyframes sway { 0%,100% { left:50%; width:6% } 40% { left:44%; width:6% } 70% { left:51%; width:9% } }
@media (prefers-reduced-motion: reduce) { .efis-bar i { animation:none } }