/* ============================================================
   Test Your Device — shared design system
   Aesthetic: "Signal" — a precise diagnostic-instrument feel.
   Warm paper base, near-black ink, one confident signal-green
   accent meaning "working / pass". Fast, clean, trustworthy.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,500;12..96,700;12..96,800&family=Hanken+Grotesk:wght@400;500;600&display=swap');

:root{
  --paper:#f7f6f1;
  --paper-2:#efeee7;
  --ink:#15161a;
  --ink-soft:#4a4d57;
  --line:#e0ded4;
  --card:#ffffff;
  --signal:#0fae6e;        /* pass / working */
  --signal-ink:#067a4c;
  --warn:#e2602f;          /* fail / attention */
  --accent:#1f6feb;        /* interactive blue */
  --shadow:0 1px 2px rgba(20,22,26,.05),0 8px 24px rgba(20,22,26,.06);
  --shadow-lg:0 24px 60px rgba(20,22,26,.14);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1120px;
  --display:'Bricolage Grotesque',ui-sans-serif,sans-serif;
  --body:'Hanken Grotesk',ui-sans-serif,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#0e0f12;--paper-2:#16181c;--ink:#f3f3ef;--ink-soft:#a3a6af;
    --line:#26282e;--card:#16181c;--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.4);
    --shadow-lg:0 24px 60px rgba(0,0,0,.6);
  }
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--body);background:var(--paper);color:var(--ink);
  line-height:1.55;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(var(--line) 1px,transparent 1px);
  background-size:26px 26px;background-attachment:fixed;
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3,.display{font-family:var(--display);font-weight:700;letter-spacing:-.02em;line-height:1.05}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
  background:color-mix(in srgb,var(--paper) 82%,transparent);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:800;font-size:1.12rem}
.brand .dot{width:13px;height:13px;border-radius:50%;background:var(--signal);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--signal) 22%,transparent);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px color-mix(in srgb,var(--signal) 22%,transparent)}50%{box-shadow:0 0 0 7px color-mix(in srgb,var(--signal) 6%,transparent)}}
.nav-links{display:flex;gap:26px;font-size:.94rem;font-weight:500}
.nav-links a{color:var(--ink-soft)}.nav-links a:hover{color:var(--ink)}
@media(max-width:720px){.nav-links{display:none}}

/* ---------- hero ---------- */
.hero{padding:74px 0 38px;text-align:center}
.hero h1{font-size:clamp(2.3rem,6vw,4rem);max-width:16ch;margin:0 auto}
.hero h1 em{font-style:normal;color:var(--signal-ink);position:relative}
.hero p.sub{font-size:clamp(1.05rem,2.4vw,1.3rem);color:var(--ink-soft);max-width:54ch;margin:20px auto 0}
.trust{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:26px}
.pill{font-size:.82rem;font-weight:600;background:var(--card);border:1px solid var(--line);
  padding:7px 14px;border-radius:999px;box-shadow:var(--shadow);display:inline-flex;gap:7px;align-items:center}
.pill svg{width:15px;height:15px;color:var(--signal)}

/* ---------- tool grid ---------- */
.section-h{display:flex;align-items:baseline;gap:14px;margin:54px 0 18px}
.section-h h2{font-size:1.5rem}
.section-h span{font-size:.82rem;color:var(--ink-soft);font-weight:600;text-transform:uppercase;letter-spacing:.08em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);transition:transform .16s ease,box-shadow .16s ease,border-color .16s;display:block}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--signal) 40%,var(--line))}
.tool-card .ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--signal) 12%,var(--card));margin-bottom:14px}
.tool-card .ic svg{width:22px;height:22px;color:var(--signal-ink)}
.tool-card h3{font-size:1.12rem;margin-bottom:5px}
.tool-card p{font-size:.9rem;color:var(--ink-soft)}

/* ---------- buttons ---------- */
.btn{font-family:var(--body);font-weight:600;font-size:1rem;cursor:pointer;border:none;
  border-radius:12px;padding:14px 26px;background:var(--ink);color:var(--paper);
  transition:transform .12s,filter .15s;display:inline-flex;align-items:center;gap:9px}
.btn:hover{transform:translateY(-2px);filter:brightness(1.08)}
.btn:active{transform:translateY(0)}
.btn.signal{background:var(--signal);color:#04130c}
.btn.ghost{background:transparent;border:1.5px solid var(--line);color:var(--ink)}
.btn.big{padding:18px 38px;font-size:1.1rem}

/* ---------- tool page shell ---------- */
.tool-wrap{max-width:860px;margin:0 auto;padding:34px 22px 60px}
.crumb{font-size:.85rem;color:var(--ink-soft);margin-bottom:18px}
.crumb a:hover{color:var(--ink)}
.tool-wrap h1{font-size:clamp(2rem,5vw,2.9rem);margin-bottom:10px}
.lede{font-size:1.12rem;color:var(--ink-soft);max-width:60ch;margin-bottom:24px}
.stage{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px;margin:8px 0 24px}
.status{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:.95rem;
  padding:8px 14px;border-radius:999px;background:var(--paper-2)}
.status .led{width:11px;height:11px;border-radius:50%;background:var(--ink-soft)}
.status.ok .led{background:var(--signal);box-shadow:0 0 8px var(--signal)}
.status.bad .led{background:var(--warn);box-shadow:0 0 8px var(--warn)}
.privacy-note{display:flex;gap:9px;align-items:flex-start;font-size:.88rem;color:var(--ink-soft);
  background:color-mix(in srgb,var(--signal) 8%,var(--card));border:1px solid color-mix(in srgb,var(--signal) 25%,var(--line));
  padding:12px 15px;border-radius:var(--radius-sm);margin:6px 0 20px}
.privacy-note svg{width:18px;height:18px;color:var(--signal-ink);flex:0 0 auto;margin-top:1px}
select.dev{font-family:var(--body);font-size:.92rem;padding:9px 12px;border:1px solid var(--line);
  border-radius:10px;background:var(--card);color:var(--ink);max-width:100%}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}

/* ---------- content / FAQ ---------- */
.prose{max-width:680px;margin:0 auto;padding-top:8px}
.prose h2{font-size:1.55rem;margin:38px 0 12px}
.prose h3{font-size:1.12rem;margin:24px 0 6px}
.prose p,.prose li{color:var(--ink);font-size:1.02rem;margin-bottom:12px}
.prose ol,.prose ul{padding-left:22px}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{font-family:var(--display);font-weight:700;font-size:1.05rem;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';float:right;color:var(--signal-ink);font-weight:800}
.faq details[open] summary::after{content:'–'}
.faq p{margin-top:10px;color:var(--ink-soft)}

/* ---------- ad slots ---------- */
.ad-slot{margin:26px auto;max-width:728px;min-height:90px;display:grid;place-items:center;
  background:repeating-linear-gradient(45deg,var(--paper-2),var(--paper-2) 10px,transparent 10px,transparent 20px);
  border:1px dashed var(--line);border-radius:var(--radius-sm);color:var(--ink-soft);font-size:.8rem}

/* ---------- footer ---------- */
footer.site{border-top:1px solid var(--line);margin-top:60px;padding:40px 0;background:var(--paper-2)}
.foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;font-size:.9rem;color:var(--ink-soft)}
.foot a:hover{color:var(--ink)}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}

/* ---------- fullscreen test (display tests) ---------- */
.fs{position:fixed;inset:0;z-index:999;display:none;place-items:center;cursor:none}
.fs.active{display:grid}
.fs .hint{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);
  font-family:var(--body);font-size:.95rem;color:#fff;background:rgba(0,0,0,.55);
  padding:10px 18px;border-radius:999px;cursor:default;backdrop-filter:blur(4px)}

/* keyboard tester */
.kb{display:flex;flex-direction:column;gap:6px;align-items:center;user-select:none}
.kb-row{display:flex;gap:6px}
.key{min-width:42px;height:42px;padding:0 8px;display:grid;place-items:center;border-radius:8px;
  background:var(--paper-2);border:1px solid var(--line);font-size:.74rem;font-weight:600;transition:.08s}
.key.wide{min-width:74px}.key.xwide{min-width:120px}.key.space{min-width:260px}
.key.down{background:var(--signal);color:#04130c;transform:translateY(2px)}
.key.used{border-color:var(--signal);color:var(--signal-ink)}
@media(max-width:620px){.key{min-width:30px;height:36px;font-size:.62rem}.key.space{min-width:150px}}

/* mouse tester */
.mouse-svg{width:150px;margin:0 auto;display:block}
.mz{fill:var(--paper-2);stroke:var(--line);stroke-width:2;transition:.1s}
.mz.on{fill:var(--signal);stroke:var(--signal-ink)}
.cps-num{font-family:var(--display);font-size:3.4rem;font-weight:800;color:var(--signal-ink);line-height:1}

/* meters */
.meter{height:18px;background:var(--paper-2);border-radius:999px;overflow:hidden;border:1px solid var(--line)}
.meter>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--signal),#7be0b4);transition:width .05s}
canvas.wave{width:100%;height:90px;background:var(--paper-2);border-radius:var(--radius-sm);border:1px solid var(--line)}
video.cam{width:100%;border-radius:var(--radius-sm);background:#000;aspect-ratio:16/9;object-fit:cover}

/* ============================================================
   Shared dropdown navigation (injected by nav.js) + homepage
   ============================================================ */
.mainnav{display:flex;align-items:center;gap:2px}
.mainnav .lnk{color:var(--ink-soft);font-weight:500;font-size:.94rem;padding:8px 12px;border-radius:8px}
.mainnav .lnk:hover{color:var(--ink);background:var(--paper-2)}
.mainnav .lnk.active{color:var(--signal-ink)}
.dd{position:relative}
.dd>button{font-family:var(--body);font-weight:500;font-size:.94rem;color:var(--ink-soft);background:none;border:none;cursor:pointer;padding:8px 12px;border-radius:8px;display:inline-flex;align-items:center;gap:6px}
.dd>button:hover,.dd:hover>button{color:var(--ink);background:var(--paper-2)}
.dd>button svg{width:11px;height:11px;transition:transform .15s}
.dd:hover>button svg,.dd.open>button svg{transform:rotate(180deg)}
.dd-menu{position:absolute;top:calc(100% + 8px);left:0;min-width:218px;background:var(--card);border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow-lg);padding:6px;opacity:0;visibility:hidden;transform:translateY(-6px);transition:.15s;z-index:60}
.dd:hover .dd-menu,.dd.open .dd-menu{opacity:1;visibility:visible;transform:none}
.dd-menu a{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:8px;font-size:.92rem;color:var(--ink-soft)}
.dd-menu a:hover{background:var(--paper-2);color:var(--ink)}
.dd-menu a.active{color:var(--signal-ink);background:color-mix(in srgb,var(--signal) 9%,transparent)}
.dd-menu a svg{width:16px;height:16px;color:var(--signal-ink);flex:0 0 auto}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:7px;cursor:pointer;color:var(--ink)}
.nav-toggle svg{width:20px;height:20px;display:block}
@media(max-width:860px){
  .nav-toggle{display:block}
  .mainnav{position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;background:var(--paper);
    border-bottom:1px solid var(--line);padding:12px 18px 20px;display:none;max-height:calc(100dvh - 64px);overflow:auto;box-shadow:var(--shadow-lg)}
  .mainnav.open{display:flex}
  .dd{width:100%}.dd>button{width:100%;justify-content:space-between}
  .dd-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:2px 0 8px 14px;min-width:0;display:none}
  .dd.open .dd-menu{display:block}
  .mainnav>.lnk{padding:11px 12px}
}

/* homepage category sections */
.cat{margin:38px 0}
.cat-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.cat-head h2{font-size:1.15rem}
.cat-head .tag{font-size:.7rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--signal-ink);
  background:color-mix(in srgb,var(--signal) 12%,transparent);padding:3px 9px;border-radius:999px}
.cat-head .line{flex:1;height:1px;background:var(--line)}
.mini-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:12px}
.mini{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:13px;
  padding:14px 15px;box-shadow:var(--shadow);transition:transform .14s,border-color .14s,box-shadow .14s}
.mini:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--signal) 45%,var(--line));box-shadow:var(--shadow-lg)}
.mini .mic{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;flex:0 0 auto;
  background:color-mix(in srgb,var(--signal) 12%,var(--card))}
.mini .mic svg{width:20px;height:20px;color:var(--signal-ink)}
.mini b{font-family:var(--display);font-weight:700;font-size:.98rem;display:block;line-height:1.2}
.mini span{font-size:.78rem;color:var(--ink-soft)}

.ad-slot{display:none}