/* 2026 night-rig oscilloscope: teal FFT, amber LED, wet steel */
:root{
  --teal:#3ee0c4;
  --amber:#e08a2a;
  --steel:#0b1016;
  --panel:#141c26;
  --ink:#dce7ef;
  --mute:#7a8b99;
  --sans:"Noto Sans SC","PingFang SC",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
section[id]{scroll-margin-top:72px}
body{margin:0;background:var(--steel);color:var(--ink);font-family:var(--sans);line-height:1.7}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
code{font-family:var(--mono);color:var(--teal)}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:var(--teal);color:#04120f;padding:8px;z-index:50}
.fft-rail{position:fixed;left:0;top:0;bottom:0;width:10px;display:flex;flex-direction:column;justify-content:space-around;padding:12px 0;z-index:40;pointer-events:none}
.fft-rail span{display:block;height:8%;margin:0 2px;background:var(--teal);opacity:.35;transform-origin:bottom}
.fft-rail span:nth-child(odd){opacity:.7;height:14%}
.rigbar{position:sticky;top:0;z-index:30;display:flex;justify-content:space-between;align-items:center;padding:10px 22px 10px 28px;background:#070b10;border-bottom:1px solid #1e2a36}
.mark{font-weight:700;letter-spacing:.04em}
.mark small{display:block;font-family:var(--mono);font-size:11px;font-weight:400;color:var(--amber)}
#nav{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center}
#nav a{font-size:13px;color:var(--mute)}
#nav a.on,#nav a:hover{color:var(--teal)}
.live{background:var(--teal)!important;color:#04120f!important;padding:6px 12px;font-weight:700}
.ham{display:none;background:transparent;color:var(--teal);border:1px solid var(--teal);padding:6px 10px}
.hud{position:relative}
.hud>img{width:100%;height:min(62vh,560px);object-fit:cover;filter:saturate(1.05)}
.hud-card{width:min(720px,calc(100% - 40px));margin:-80px 0 0 auto;margin-right:max(24px,calc((100% - 1100px)/2));background:rgba(11,16,22,.92);padding:28px 28px 24px;border-left:4px solid var(--teal);backdrop-filter:blur(8px);position:relative}
.tag{font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--amber);margin:0 0 8px}
h1,h2,h3{margin:0 0 10px;line-height:1.2}
h1{font-size:clamp(1.8rem,4.2vw,3rem)}
.rul{margin:16px 0;padding:12px 14px;background:#0e1620;border:1px dashed var(--amber)}
.rul strong{display:block;margin:4px 0;color:var(--teal)}
.rul p{margin:0;color:var(--mute);font-size:14px}
.acts{display:flex;flex-wrap:wrap;gap:8px}
.btn{display:inline-flex;align-items:center;padding:9px 14px;background:var(--teal);color:#04120f;border:0;font-weight:700;font-size:14px}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid #314150;font-weight:400}
.wrap{width:min(1080px,calc(100% - 48px));margin:0 auto;padding:72px 0}
.night{background:#0a1118}
.three,.tiles{display:grid;gap:14px;margin-top:16px}
.three{grid-template-columns:repeat(3,1fr)}
.tiles{grid-template-columns:repeat(3,1fr)}
.three article,.tiles article{background:var(--panel);padding:16px;border-top:2px solid #243140}
.alert{border-top-color:var(--amber)!important}
ul{margin:0;padding-left:1.1em}
.steps{list-style:none;margin:20px 0 0;padding:0}
.steps li{display:grid;grid-template-columns:64px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid #1e2a36}
.steps span{font-family:var(--mono);color:var(--teal);font-size:22px}
.shot{margin:28px 0 0}
.shot figcaption{font-size:13px;color:var(--mute);margin-top:8px}
.bound{max-width:720px}
footer{background:#070b10;border-top:1px solid #1e2a36}
.foot{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:22px 0}
@media(max-width:860px){
  .ham{display:block}
  #nav{display:none;position:absolute;top:52px;left:10px;right:10px;flex-direction:column;background:#070b10;padding:12px;border:1px solid #1e2a36}
  #nav.open{display:flex}
  .three,.tiles{grid-template-columns:1fr}
  .hud-card{margin: -40px 16px 0}
  .fft-rail{display:none}
  .foot{flex-direction:column;align-items:flex-start}
  .steps li{grid-template-columns:1fr}
}