/* AV Bench – shared styles */
:root{
  --bg:#0a0b0d; --bg2:#0d0f12; --panel:#111317; --panel2:#16191e; --line:#23272e; --line2:#353b44;
  --fg:#eceef1; --muted:#9aa1ab; --accent:#22c7f0; --accent-ink:#04141b; --accent-hi:#5ad6f5;
  --pass:#3ddc84; --warn:#ff8a3d; --navy:#06265e;
  --display:'Archivo',system-ui,sans-serif; --body:'IBM Plex Sans',system-ui,sans-serif; --mono:'IBM Plex Mono',ui-monospace,Menlo,Consolas,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 var(--body);-webkit-font-smoothing:antialiased}
a{color:inherit}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
h1,h2,h3{font-family:var(--display);font-stretch:112%;margin:0;letter-spacing:-.01em}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
@media(min-width:720px){.wrap{padding:0 24px}}
.caps{font:500 12px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.caps.accent{color:var(--accent)}
.muted{color:var(--muted)}
.mono{font-family:var(--mono)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* top bar */
.top{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:10}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--fg)}
.brand img{height:40px;width:auto}
.brand span{font:800 19px/1 var(--display);font-stretch:112%}
.brand:hover{color:var(--fg)}
.nav{display:flex;align-items:center;gap:22px}
.nav a{text-decoration:none;color:var(--muted);font-size:15px}
.nav a:hover,.nav a[aria-current=page]{color:var(--fg)}
.nav a,.brand span{white-space:nowrap}
@media(max-width:640px){.nav a.hide-sm{display:none}}
@media(max-width:430px){.nav a:not(.btn){display:none}.brand img{height:34px}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:10px;font:600 16px/1 var(--body);text-decoration:none;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{background:var(--accent-hi);color:var(--accent-ink)}
.btn-ghost{border-color:var(--line2);color:var(--fg);background:transparent;font-weight:500}
.btn-ghost:hover{border-color:var(--accent);color:var(--fg)}
.btn-sm{min-height:44px;padding:0 16px;font-size:14px;border-radius:8px}
.nav .btn{color:var(--accent-ink)}
.nav .btn:hover{color:var(--accent-ink)}

/* sections */
section{border-bottom:1px solid var(--line)}
.sec{padding-block:80px}
@media(max-width:720px){.sec{padding-block:56px}}
.h2{font-weight:700;font-size:clamp(1.6rem,3.4vw,2.5rem);line-height:1.1}
.split{display:flex;flex-wrap:wrap;gap:48px;align-items:center}
.split>*{flex:1 1 400px;min-width:0}

/* hero */
.hero{background:radial-gradient(60% 70% at 80% 30%,rgba(14,91,214,.22),transparent 70%),var(--bg)}
.hero .split{padding-block:88px 96px}
@media(max-width:720px){.hero .split{padding-block:48px 56px}}
.hero h1{font-weight:800;font-size:clamp(2.3rem,5.4vw,4rem);line-height:1.04;letter-spacing:-.015em}
.lead{font-size:19px;color:var(--muted);max-width:34rem}
.stack{display:flex;flex-direction:column;gap:22px}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* panels */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px}
.readout{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.cell{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:12px 14px;min-width:0}
.cell .k{font-size:13px;color:var(--muted)}
.cell .v{font:600 22px/1.25 var(--mono);overflow-wrap:anywhere}
.cell .v small{font-size:14px;color:var(--muted);font-weight:500}
.passlist{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px 16px;display:flex;flex-direction:column;gap:8px;font:14px var(--mono)}
.passlist div{display:flex;justify-content:space-between;gap:12px}
.pass{color:var(--pass);font-weight:600}
.live{display:inline-flex;align-items:center;gap:6px;font:12px var(--mono);color:var(--pass)}
.live::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--pass)}

/* tool cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.card{display:flex;flex-direction:column;gap:10px;min-height:172px;padding:20px;border-radius:14px;background:var(--panel);border:1px solid var(--line);text-decoration:none;color:var(--fg)}
a.card:hover{border-color:var(--accent);color:var(--fg)}
.card .code{font:12px var(--mono);letter-spacing:.1em;color:var(--accent)}
.card h3{font-weight:700;font-size:18px;line-height:1.25}
.card p{font-size:14px;color:var(--muted);line-height:1.5}
.chip{font:11px var(--mono);letter-spacing:.08em;text-transform:uppercase;padding:3px 8px;border-radius:999px;border:1px solid var(--line2);color:var(--muted)}
.chip.free{color:var(--pass)}
.card .top-row{display:flex;justify-content:space-between;align-items:center;gap:8px}
div.card{opacity:.75}

/* report mock */
.report{background:#f4f5f7;color:#15171a;border-radius:14px;padding:28px;display:flex;flex-direction:column;gap:16px;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.report .head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;border-bottom:2px solid #15171a;padding-bottom:12px}
.report .head img{height:30px;width:auto;margin-bottom:8px}
.report .badge{background:#0f8a45;color:#fff;font:600 13px var(--mono);padding:4px 10px;border-radius:6px;white-space:nowrap}
.report .line{display:flex;justify-content:space-between;gap:12px;padding-bottom:8px;border-bottom:1px solid #dde0e5;font-size:14px}
.report .line:last-child{border:0;padding:0}
.report .ok{font-family:var(--mono);color:#0f7a3d;font-weight:600}
.report .meta{font-size:12px;color:#4a5059}

/* forms */
label{font-size:14px;color:var(--muted)}
.field{display:flex;flex-direction:column;gap:6px}
input[type=text],input[type=email],input[type=number],select{min-height:48px;background:var(--bg);border:1px solid var(--line2);border-radius:10px;color:var(--fg);font:inherit;padding:0 14px;width:100%}
input[type=number]{font-family:var(--mono);font-size:18px}
input:focus,select:focus{border-color:var(--accent);outline:none}
.check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);cursor:pointer}
.check input{width:18px;height:18px;margin:2px 0 0;flex:0 0 auto;accent-color:var(--accent)}
.pills{display:flex;flex-wrap:wrap;gap:8px}
.pill{min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--line2);background:transparent;color:var(--fg);font:14px var(--mono);cursor:pointer}
.pill[aria-pressed=true]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}
fieldset{border:0;margin:0;padding:0;min-width:0}
legend{padding:0;margin-bottom:8px;font-size:14px;color:var(--muted)}
.form-msg{font-size:14px;min-height:1.4em}
.form-msg.ok{color:var(--pass)}.form-msg.err{color:var(--warn)}

/* tool pages */
.crumb{font:12px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);text-decoration:none}
.tool-head{padding-block:48px 32px;display:flex;flex-direction:column;gap:12px}
.tool-head h1{font-weight:800;font-size:clamp(2rem,4.4vw,3rem);line-height:1.08}
.tool-head p{color:var(--muted);font-size:18px;max-width:44rem}
.tool{display:flex;flex-wrap:wrap;gap:24px;align-items:flex-start;padding-bottom:40px}
.tool .inputs{flex:1 1 340px;min-width:0;display:flex;flex-direction:column;gap:20px}
.tool .results{flex:1.3 1 420px;min-width:0;display:flex;flex-direction:column;gap:20px}
.big{font:600 clamp(2.6rem,6vw,4rem)/1.05 var(--mono)}
.big small{font-size:.42em;color:var(--muted);font-weight:500}
.cells3{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px}
.note{font-size:13px;color:var(--muted)}
.tip{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14px;color:var(--muted)}
.tip b{color:var(--fg)}
.bar{height:8px;background:var(--line);border-radius:999px;overflow:hidden}
.bar>div{height:8px;border-radius:999px;background:var(--pass);transition:width .2s}
.cta-band{border-top:1px solid var(--line);padding-block:28px 72px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px}

/* device rows (power) */
.dev-head,.dev{display:grid;grid-template-columns:minmax(0,1fr) 96px 72px 44px;gap:10px;align-items:center}
.dev-head{font-size:13px;color:var(--muted);padding:0 2px}
.dev input{min-height:44px;font-size:15px;padding:0 10px;border-radius:8px}
.icon-btn{width:44px;height:44px;border-radius:8px;border:1px solid var(--line2);background:transparent;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.icon-btn:hover{color:var(--warn);border-color:var(--warn)}
.add{min-height:44px;padding:0 16px;border-radius:8px;border:1px dashed var(--line2);background:transparent;color:var(--accent);font:600 15px var(--body);cursor:pointer}
@media(max-width:480px){.dev-head,.dev{grid-template-columns:minmax(0,1fr) 76px 56px 44px;gap:6px}}

/* footer */
footer .wrap{padding:40px 16px 56px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px;font-size:14px;color:var(--muted)}
@media(min-width:720px){footer .wrap{padding:40px 24px 56px}}
footer nav{display:flex;flex-wrap:wrap;gap:20px;align-items:center}
footer a{color:var(--muted)}
footer img{height:64px;width:auto;align-self:flex-start}

/* print (tools: Print / save as PDF) */
@media print{
  :root{color-scheme:light}
  body{background:#fff;color:#000}
  .top,.cta-band,footer,.no-print,.add,.icon-btn{display:none!important}
  .panel,.cell,.tip{background:#fff;border-color:#ccc;color:#000}
  .muted,.note,label,.cell .k,.tool-head p,.crumb,.caps{color:#444}
  input,select{background:#fff;color:#000;border-color:#999}
  .print-only{display:block!important}
}
.print-only{display:none}

/* ---------------------------------------------------------------- motion & life */
/* hero: faint measuring grid and a slow-drifting glow */
.hero{position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-20%;background:radial-gradient(40% 45% at 70% 35%,rgba(14,91,214,.28),transparent 70%),radial-gradient(30% 35% at 20% 80%,rgba(34,199,240,.08),transparent 70%);animation:drift 22s ease-in-out infinite alternate;pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(70% 80% at 65% 40%,#000,transparent 75%);mask-image:radial-gradient(70% 80% at 65% 40%,#000,transparent 75%);pointer-events:none}
.hero>.wrap{position:relative;z-index:1}
@keyframes drift{0%{transform:translate(0,0) scale(1)}100%{transform:translate(-6%,4%) scale(1.08)}}

/* live dot */
.live::before{animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(61,220,132,.55)}50%{box-shadow:0 0 0 6px rgba(61,220,132,0)}}

/* signal trace */
.scope{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px 8px}
.scope-head{display:flex;justify-content:space-between;gap:8px;margin-bottom:6px}
.scope-head .caps{font-size:11px}
.scope svg{display:block;width:100%;height:56px}
.scope path{fill:none;vector-effect:non-scaling-stroke}
.scope-grid{stroke:var(--line);stroke-width:1}
.scope-l{stroke:var(--accent);stroke-width:1.8;filter:drop-shadow(0 0 4px rgba(34,199,240,.6))}
.scope-r{stroke:#4f7dff;stroke-width:1.4;opacity:.8}

/* mic level meter */
.meter-row{display:flex;align-items:center;gap:12px}
.meter-row .caps{font-size:11px;white-space:nowrap}
.meter{flex:1;display:flex;align-items:flex-end;gap:3px;height:22px}
.meter i{flex:1;height:100%;border-radius:2px;background:linear-gradient(to top,#1f9d63,var(--pass));transform-origin:bottom;transform:scaleY(.25);animation:lvl 1.1s ease-in-out infinite alternate}
.meter i:nth-child(3n){animation-duration:.8s}.meter i:nth-child(4n+1){animation-duration:1.4s}.meter i:nth-child(5n+2){animation-duration:.95s}
.meter i:nth-child(odd){animation-delay:-.4s}.meter i:nth-child(3n+1){animation-delay:-.75s}
.meter i:nth-child(n+15){background:linear-gradient(to top,#1f9d63,#e6d34a)}.meter i:nth-child(n+19){background:linear-gradient(to top,#1f9d63,var(--warn))}
@keyframes lvl{0%{transform:scaleY(.15)}60%{transform:scaleY(.55)}100%{transform:scaleY(.85)}}

/* test run: rows show TESTING… then flip to PASS */
[data-run] .state{transition:color .25s}
[data-run].running .state:not(.done){color:var(--muted)!important}
[data-run].running .state:not(.done)::before{content:"TESTING";}
[data-run].running .state:not(.done){font-size:0}
[data-run].running .state:not(.done)::before{font-size:12px;letter-spacing:.06em;animation:blink 1s steps(2) infinite}
.report[data-run].running .state:not(.done)::before{font-size:13px;color:#4a5059}
.state.done{animation:pop .35s ease-out}
@keyframes blink{50%{opacity:.35}}
@keyframes pop{0%{transform:scale(.6);opacity:0}100%{transform:scale(1);opacity:1}}
.report .badge{transition:opacity .3s}
.report.running .badge{opacity:0}

/* cards and buttons */
.card{transition:border-color .2s,transform .2s,box-shadow .2s}
a.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.35),0 0 0 1px rgba(34,199,240,.25)}
a.card .code::after{content:" →";opacity:0;transition:opacity .2s,margin .2s;margin-left:-4px}
a.card:hover .code::after{opacity:1;margin-left:0}
.btn{transition:background .2s,border-color .2s,box-shadow .2s,transform .1s}
.btn-primary:hover{box-shadow:0 0 0 4px rgba(34,199,240,.15),0 8px 24px rgba(34,199,240,.25)}
.btn:active{transform:translateY(1px)}

/* scroll reveal */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.in{opacity:1;transform:none}
.js .reveal-group>*{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.js .reveal-group.in>*{opacity:1;transform:none}
.js .reveal-group.in>*:nth-child(2){transition-delay:.05s}.js .reveal-group.in>*:nth-child(3){transition-delay:.1s}.js .reveal-group.in>*:nth-child(4){transition-delay:.15s}
.js .reveal-group.in>*:nth-child(5){transition-delay:.2s}.js .reveal-group.in>*:nth-child(6){transition-delay:.25s}.js .reveal-group.in>*:nth-child(7){transition-delay:.3s}.js .reveal-group.in>*:nth-child(8){transition-delay:.35s}
.js div.card.reveal-group>*,.js .reveal-group.in>div.card{opacity:.75}

/* tool results: brief flash when a number changes */
.big.bump{animation:bump .35s ease-out}
@keyframes bump{0%{color:var(--accent-hi);text-shadow:0 0 18px rgba(34,199,240,.5)}100%{color:inherit;text-shadow:none}}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .reveal,.js .reveal-group>*{opacity:1;transform:none}
  .meter i{transform:scaleY(.5)}
}
.passlist .state{color:var(--pass);font-weight:600}

/* tool page articles */
.article{max-width:760px;padding:24px 0 56px;display:flex;flex-direction:column;gap:14px;border-top:1px solid var(--line)}
.article h2{font-weight:700;font-size:clamp(1.3rem,2.4vw,1.6rem);line-height:1.2;margin-top:22px}
.article p,.article li{color:#c4c9d0;font-size:16.5px;line-height:1.7}
.article b{color:var(--fg)}
.article ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.formula{font:600 15px/1.5 var(--mono);color:var(--fg)!important;background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;padding:12px 16px}
table.data{border-collapse:collapse;width:100%;font-size:15px}
table.data th,table.data td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
table.data th{color:var(--muted);font-weight:500;font-size:13px}
table.data td{font-family:var(--mono)}
.faq{display:flex;flex-direction:column;gap:10px}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 18px}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--accent)}
.faq details[open] summary::after{content:"–"}
.faq details>div{margin-top:10px}
@media print{.article{display:none}}