/* Call Quality Test — shared styles. No build step. */
:root{
  --ink:#0f1b2b; --ink-2:#2b3a4f; --muted:#5b6b80; --line:#d9dfe7; --paper:#f6f7f4; --card:#ffffff;
  --panel:#0c1622; --panel-2:#132235; --panel-line:#22364f; --panel-text:#cfe0f2;
  --green:#18b26b; --amber:#e8a317; --red:#d9453f; --blue:#2f7de1; --led-off:#2a3b52;
  --accent:#0b6bcb; --accent-ink:#ffffff;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --radius:10px; --wrap:1120px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 var(--sans)}
a{color:var(--accent)} a:hover{color:#084f97}
img,svg{max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}

/* ---------- header ---------- */
.topbar{background:var(--panel);color:var(--panel-text);font:13px/1 var(--mono);border-bottom:1px solid var(--panel-line)}
.topbar .wrap{display:flex;gap:16px;align-items:center;justify-content:space-between;min-height:34px;flex-wrap:wrap}
.leds{display:flex;gap:14px;align-items:center}
.led{display:inline-flex;align-items:center;gap:6px;letter-spacing:.06em}
.led i{width:8px;height:8px;border-radius:50%;background:var(--led-off);box-shadow:inset 0 0 0 1px #0006}
.led.on i{background:var(--green);box-shadow:0 0 6px var(--green)}
.led.blink i{background:var(--green);animation:blink 1.1s steps(2,start) infinite;box-shadow:0 0 6px var(--green)}
.led.amber i{background:var(--amber);box-shadow:0 0 6px var(--amber)}
@keyframes blink{to{visibility:hidden}}
.topbar a{color:#fff;text-decoration:none}
header.site{background:var(--panel-2);color:#fff;position:sticky;top:0;z-index:20;border-bottom:3px solid var(--accent)}
header.site .wrap{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;letter-spacing:.01em;font-size:19px;white-space:nowrap}
.brand svg{flex:0 0 auto}
.brand small{display:block;font:500 11px/1.2 var(--mono);color:#9fb6cf;letter-spacing:.08em;text-transform:uppercase}
nav.main{margin-left:auto;display:flex;align-items:center;gap:4px}
nav.main a,nav.main button{color:#dbe7f4;text-decoration:none;font:500 15px/1 var(--sans);padding:10px 10px;border-radius:6px;background:none;border:0;cursor:pointer}
nav.main a:hover,nav.main button:hover,nav.main a[aria-current="page"]{background:#ffffff14;color:#fff}
.dd{position:relative}
.dd-menu{display:none;position:absolute;top:100%;left:0;min-width:270px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px #0f1b2b33;padding:8px}
.dd-menu a{display:block;color:var(--ink)!important;padding:9px 10px!important;border-radius:6px}
.dd-menu a:hover{background:#eef3f9!important}
.dd-menu a span{display:block;font-size:12.5px;color:var(--muted)}
.dd.open .dd-menu{display:block}
.callbtn{background:var(--green)!important;color:#fff!important;font-weight:700!important;white-space:nowrap}
.menu-toggle{display:none;margin-left:auto;background:none;border:1px solid #ffffff40;color:#fff;border-radius:6px;padding:8px 10px;font:600 14px var(--sans)}
@media (max-width:1080px){
  .menu-toggle{display:block}
  nav.main{display:none;position:absolute;left:0;right:0;top:100%;background:var(--panel-2);flex-direction:column;align-items:stretch;padding:8px 16px 16px;border-bottom:3px solid var(--accent)}
  nav.main.open{display:flex}
  .dd-menu{position:static;box-shadow:none;margin:4px 0 8px}
  .leds .led.hide-sm{display:none}
}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,var(--panel-2),var(--panel));color:#fff;padding:44px 0 56px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;inset:0;background-image:linear-gradient(#ffffff08 1px,transparent 1px),linear-gradient(90deg,#ffffff08 1px,transparent 1px);background-size:28px 28px;pointer-events:none}
.hero .wrap{position:relative;z-index:1}
.crumbs{font:13px var(--mono);color:#9fb6cf;margin-bottom:14px}
.crumbs a{color:#9fb6cf}
.hero h1{font-size:clamp(30px,4.4vw,46px);line-height:1.12;margin:0 0 12px;letter-spacing:-.01em}
.hero p.lede{font-size:19px;color:#d4e2f1;max-width:760px;margin:0 0 18px}
.byline{display:flex;gap:10px;align-items:center;font-size:14px;color:#a9bfd6}
.byline .avatar{width:34px;height:34px;border-radius:50%;background:#2f4a69;display:grid;place-items:center;font:700 14px var(--mono);color:#fff;border:1px solid #4c6b90}
.answer{background:#ffffff0f;border:1px solid #ffffff26;border-left:4px solid var(--green);border-radius:8px;padding:14px 16px;margin:18px 0 0;max-width:820px;color:#e7f0f9}
.answer strong{color:#fff}

/* ---------- layout ---------- */
main{display:block}
.section{padding:40px 0}
.grid-2{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px}
@media (max-width:980px){.grid-2{grid-template-columns:minmax(0,1fr)}}
.prose,.side{min-width:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.prose h2{font-size:26px;line-height:1.25;margin:34px 0 10px}
.prose h3{font-size:19px;margin:24px 0 6px}
.prose p,.prose li{color:var(--ink-2)}
.prose code,.mono{font-family:var(--mono);font-size:.9em;background:#eef1f5;padding:1px 5px;border-radius:4px}
.prose pre{background:var(--panel);color:#d8e6f5;padding:14px 16px;border-radius:8px;overflow:auto;font:14px/1.5 var(--mono)}
.prose pre code{background:none;padding:0;color:inherit}
.note{background:#fff8e6;border:1px solid #f1d38a;border-radius:8px;padding:12px 14px;font-size:15px}
.tip{background:#eaf6ef;border:1px solid #b5e0c7;border-radius:8px;padding:12px 14px;font-size:15px}
table.data{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
table.data th,table.data td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.data th{background:#eef2f7;font-weight:600}
.tbl-wrap{overflow-x:auto;margin:12px 0}
.pill{display:inline-block;font:600 12px/1 var(--mono);padding:4px 7px;border-radius:999px;color:#fff;letter-spacing:.03em}
.pill.g{background:var(--green)}.pill.a{background:var(--amber)}.pill.r{background:var(--red)}.pill.b{background:var(--blue)}

/* ---------- tool / instrument panel ---------- */
.instrument{background:var(--panel);color:var(--panel-text);border-radius:14px;border:1px solid var(--panel-line);padding:20px;box-shadow:0 18px 40px #0c162233;margin-top:-34px;position:relative;z-index:2}
.instrument h2{color:#fff;font-size:18px;margin:0 0 4px;font-family:var(--mono);letter-spacing:.04em;text-transform:uppercase}
.instrument .sub{font-size:14px;color:#9fb6cf;margin:0 0 14px}
.meters{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:14px 0}
.meter{background:var(--panel-2);border:1px solid var(--panel-line);border-radius:10px;padding:12px;text-align:center}
.meter .lbl{font:600 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:#8fa9c4}
.meter .val{font:600 30px/1.1 var(--mono);color:#fff;margin:8px 0 2px}
.meter .unit{font:13px var(--mono);color:#8fa9c4}
.meter .grade{margin-top:6px;min-height:20px}
.meter.good{border-color:#1d6b49}.meter.fair{border-color:#7a5a12}.meter.poor{border-color:#7b2724}
.gauge{display:block;margin:0 auto;width:100%;max-width:300px}
.btnrow{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:#fff;border:0;border-radius:8px;padding:13px 20px;font:700 16px var(--sans);cursor:pointer;text-decoration:none}
.btn:hover{background:#0957a6;color:#fff}
.btn.go{background:var(--green)}.btn.go:hover{background:#13965a}
.btn.ghost{background:transparent;border:1px solid #9fb6cf66;color:#dbe7f4}
.btn.light{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.status{font:14px var(--mono);color:#9fb6cf;min-height:22px}
.bar{height:8px;background:#1d2f45;border-radius:99px;overflow:hidden;margin:10px 0}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue),var(--green));transition:width .2s}
.spark{width:100%;height:90px;background:var(--panel-2);border:1px solid var(--panel-line);border-radius:8px;display:block}
.verdict{margin-top:14px;border-radius:10px;padding:14px 16px;background:#ffffff0d;border:1px solid var(--panel-line);display:none}
.verdict.show{display:block}
.verdict h3{margin:0 0 6px;color:#fff;font-size:17px}
.verdict p{margin:6px 0;color:#cfe0f2;font-size:15px}
.verdict .cta-line{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.form-inline{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:10px 0}
.form-inline label{font:600 12px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:#8fa9c4;display:block}
.form-inline input,.form-inline select{width:100%;margin-top:4px;background:#0a131d;border:1px solid var(--panel-line);color:#fff;border-radius:6px;padding:10px;font:16px var(--mono)}
.kv{font:14px/1.7 var(--mono);color:#cfe0f2;background:var(--panel-2);border:1px solid var(--panel-line);border-radius:8px;padding:12px;overflow-x:auto;white-space:pre-wrap;word-break:break-word}
.lvl{height:22px;background:#0a131d;border:1px solid var(--panel-line);border-radius:6px;overflow:hidden}
.lvl i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--green) 0 70%,var(--amber) 70% 88%,var(--red) 88%)}

/* ---------- sidebar ---------- */
.side .card{margin-bottom:18px}
.side h3{margin:0 0 8px;font-size:16px}
.side ul{list-style:none;padding:0;margin:0}
.side li a{display:block;padding:7px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.side li a:hover{color:var(--accent)}
.helpcard{background:var(--panel-2);color:#dbe7f4;border-color:var(--panel-line)}
.helpcard h3{color:#fff}
.helpcard .phone{font:700 26px var(--mono);color:#fff;text-decoration:none;display:block;margin:6px 0}

/* ---------- FAQ ---------- */
.faq{margin-top:10px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:8px;margin:8px 0;padding:0 16px}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;position:relative;padding-right:26px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:0;top:12px;font:600 20px var(--mono);color:var(--muted)}
.faq details[open] summary:after{content:"–"}
.faq details p{margin:0 0 14px;color:var(--ink-2)}

/* ---------- tool cards ---------- */
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.tool{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;text-decoration:none;color:var(--ink);transition:transform .12s,box-shadow .12s}
.tool:hover{transform:translateY(-2px);box-shadow:0 10px 24px #0f1b2b1a;color:var(--ink)}
.tool b{display:flex;align-items:center;gap:8px;font-size:17px}
.tool b i{width:9px;height:9px;border-radius:50%;background:var(--green);box-shadow:0 0 5px var(--green)}
.tool span{display:block;color:var(--muted);font-size:14.5px;margin-top:4px}

/* ---------- CTA band ---------- */
.band{background:var(--panel-2);color:#fff;padding:34px 0}
.band .wrap{display:flex;gap:20px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.band h2{margin:0 0 4px;font-size:24px}
.band p{margin:0;color:#bcd0e5}

/* ---------- contact form ---------- */
form.lead{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form.lead .full{grid-column:1/-1}
form.lead label{display:block;font-weight:600;font-size:15px;margin-bottom:4px}
form.lead input,form.lead select,form.lead textarea{width:100%;padding:11px 12px;border:1px solid #c3ccd8;border-radius:8px;font:16px var(--sans);background:#fff;color:var(--ink)}
form.lead textarea{min-height:120px;font-family:var(--mono);font-size:14px}
form.lead .check{display:flex;gap:8px;align-items:flex-start;font-weight:400}
form.lead .check input{width:auto;margin-top:5px}
.hp{position:absolute;left:-5000px}
@media (max-width:640px){form.lead{grid-template-columns:1fr}}

/* ---------- footer ---------- */
footer.site{background:var(--panel);color:#a9bfd6;padding:40px 0 24px;font-size:14.5px}
footer.site .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}
footer.site h4{color:#fff;margin:0 0 8px;font-size:14px;font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase}
footer.site ul{list-style:none;padding:0;margin:0}
footer.site li{margin:5px 0}
footer.site a{color:#cfe0f2;text-decoration:none}
footer.site a:hover{color:#fff;text-decoration:underline}
footer.site .legal{border-top:1px solid var(--panel-line);margin-top:24px;padding-top:16px;font-size:13px}
@media (max-width:800px){footer.site .cols{grid-template-columns:1fr 1fr}}
.mobile-call{display:none}
@media (max-width:700px){
  .mobile-call{display:flex;position:fixed;left:12px;right:12px;bottom:12px;z-index:30;justify-content:center;background:var(--green);color:#fff;font:700 17px var(--sans);text-decoration:none;padding:14px;border-radius:12px;box-shadow:0 10px 26px #0c162255}
  body{padding-bottom:76px}
}
@media print{header.site,.topbar,.mobile-call,footer.site,.band{display:none}}
form.lead .err{display:block;min-height:18px;margin-top:3px;font-size:13.5px;color:var(--red);font-weight:600}
form.lead [aria-invalid="true"]{border-color:var(--red);box-shadow:0 0 0 3px #d9453f22}
form.lead [aria-invalid="false"]:not([type=checkbox]){border-color:var(--green)}