/* ============================================================
   SpeedPulse — shared design system
   Dark minimalist · glassmorphism · emerald/cyan accents
   ============================================================ */

/* ---------- 01 · Tokens ---------- */
:root{
  --bg:#0A0C10;
  --bg-2:#0D1117;
  --surface:#161B22;
  --surface-2:#1B2230;
  --border:rgba(240,246,252,.08);
  --border-strong:rgba(240,246,252,.15);
  --text:#E6EDF3;
  --muted:#9BA7B4;
  --dim:#6E7A87;
  --em:#10B981;
  --em-bright:#34D399;
  --em-soft:rgba(16,185,129,.13);
  --cy:#06B6D4;
  --cy-bright:#22D3EE;
  --cy-soft:rgba(6,182,212,.13);
  --warn:#FBBF24;
  --warn-soft:rgba(251,191,36,.12);
  --danger:#F87171;
  --danger-soft:rgba(248,113,113,.12);
  --grad:linear-gradient(135deg,#10B981 0%,#06B6D4 100%);
  --radius:16px;
  --radius-sm:10px;
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shadow-lg:0 24px 60px -24px rgba(0,0,0,.65);
  --head-h:66px;
}

/* ---------- 02 · Reset / base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
ul,ol{list-style:none}
[hidden]{display:none!important}
::selection{background:rgba(16,185,129,.35);color:#fff}
:focus-visible{outline:2px solid var(--em);outline-offset:3px;border-radius:4px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#232B36;border-radius:999px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#2E3946}

/* ---------- 03 · Ambient background ---------- */
.bg-aura{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.bg-aura::before,.bg-aura::after{content:"";position:absolute;border-radius:50%;filter:blur(90px)}
.bg-aura::before{width:52vw;height:52vw;min-width:480px;min-height:480px;top:-24vw;left:-12vw;background:radial-gradient(circle,rgba(16,185,129,.14),transparent 65%)}
.bg-aura::after{width:44vw;height:44vw;min-width:420px;min-height:420px;top:-16vw;right:-10vw;background:radial-gradient(circle,rgba(6,182,212,.11),transparent 65%)}
.bg-grid{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:radial-gradient(circle,rgba(230,237,243,.045) 1px,transparent 1px);
  background-size:30px 30px;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 70vh);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 70vh);
}

/* ---------- 04 · Layout & typography ---------- */
.container{width:min(1140px,92vw);margin-inline:auto}
main{flex:1;animation:pageIn .55s cubic-bezier(.16,1,.3,1) both}
.section{padding:4.5rem 0}
.section-tight{padding:2.5rem 0}
[id]{scroll-margin-top:calc(var(--head-h) + 20px)}
h1,h2,h3,h4{line-height:1.18;letter-spacing:-.02em;font-weight:700}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--mono);font-size:.74rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--em-bright)}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--grad)}
.sec-title{font-size:clamp(1.7rem,3.4vw,2.35rem);margin:.65rem 0 .8rem}
.sec-lede,.lede{color:var(--muted);font-size:1.06rem;max-width:62ch}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.center{text-align:center}
.center .sec-lede,.center .lede{margin-inline:auto}

/* ---------- 05 · Header / nav ---------- */
.site-head{position:sticky;top:0;z-index:60;
  background:rgba(10,12,16,.72);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid transparent;
  transition:border-color .3s ease,background .3s ease;
}
.site-head.scrolled{border-bottom-color:var(--border);background:rgba(10,12,16,.86)}
.head-inner{height:var(--head-h);display:flex;align-items:center;gap:1.5rem}
.brand{display:flex;align-items:center;gap:.65rem;font-weight:800;font-size:1.13rem;letter-spacing:-.02em;flex-shrink:0}
.brand-name{white-space:nowrap}
.brand em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-mark{width:32px;height:32px;border-radius:9px;background:var(--grad);display:grid;place-items:center;box-shadow:0 4px 16px -4px rgba(16,185,129,.55)}
.brand-mark svg{width:19px;height:19px;stroke:#04110C;stroke-width:2.6;fill:none;stroke-linecap:round;stroke-linejoin:round}
.site-nav{display:flex;align-items:center;gap:.25rem;margin-left:auto}
.nav-link{padding:.48rem .85rem;border-radius:999px;color:var(--muted);font-size:.92rem;font-weight:500;transition:color .2s,background .2s;white-space:nowrap}
.nav-link:hover{color:var(--text);background:rgba(240,246,252,.05)}
.nav-link.active{color:var(--em-bright);background:var(--em-soft)}
.head-actions{display:flex;align-items:center;gap:.8rem;flex-shrink:0}
.nav-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--border);flex-direction:column;align-items:center;justify-content:center;gap:5px;background:rgba(240,246,252,.03)}
.nav-toggle span{display:block;width:17px;height:2px;border-radius:2px;background:var(--text);transition:transform .3s ease,opacity .2s ease}
.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-open .nav-toggle span:nth-child(2){opacity:0}
.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 06 · Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55rem;font-weight:600;font-size:.95rem;padding:.78rem 1.5rem;border-radius:12px;transition:transform .2s ease,box-shadow .25s ease,filter .2s ease,background .2s ease,border-color .2s ease;white-space:nowrap}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{background:var(--grad);color:#04110C;box-shadow:0 10px 28px -10px rgba(16,185,129,.55)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 14px 34px -10px rgba(16,185,129,.65)}
.btn-ghost{border:1px solid var(--border-strong);color:var(--text);background:rgba(240,246,252,.02)}
.btn-ghost:hover{border-color:rgba(16,185,129,.5);background:rgba(16,185,129,.07);transform:translateY(-1px)}
.btn-sm{padding:.5rem 1.05rem;font-size:.86rem;border-radius:10px}
.btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.btn.loading{pointer-events:none;opacity:.75}
.btn .spin{width:15px;height:15px;border-radius:50%;border:2px solid rgba(4,17,12,.35);border-top-color:#04110C;animation:rot 0.7s linear infinite}

/* ---------- 07 · Cards / surfaces ---------- */
.card{background:linear-gradient(180deg,rgba(240,246,252,.025),rgba(240,246,252,0) 46%),var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease}
.card-hover:hover{border-color:rgba(16,185,129,.4);transform:translateY(-3px);box-shadow:0 18px 44px -18px rgba(0,0,0,.6)}
.glass{background:rgba(22,27,34,.55);-webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);border:1px solid var(--border);border-radius:var(--radius)}
.grad-border{position:relative;border:1px solid transparent;border-radius:var(--radius);background:linear-gradient(var(--surface),var(--surface)) padding-box,linear-gradient(135deg,rgba(16,185,129,.65),rgba(6,182,212,.65)) border-box}
.ico-chip{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--em-soft);color:var(--em-bright);flex-shrink:0}
.ico-chip svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ico-chip.cyan{background:var(--cy-soft);color:var(--cy-bright)}
.ico-chip.amber{background:var(--warn-soft);color:var(--warn)}
.ico-chip.red{background:var(--danger-soft);color:var(--danger)}

/* ---------- 08 · Page hero (secondary pages) ---------- */
.page-hero{padding:4.2rem 0 2.6rem;position:relative}
.page-hero h1{font-size:clamp(2.1rem,4.6vw,3.1rem);margin:.7rem 0 1rem;max-width:22ch}
.page-hero .lede{font-size:1.12rem}

/* ---------- 09 · Home hero + gauge ---------- */
.hero{padding:3.6rem 0 1.4rem;text-align:center;position:relative}
.hero-badge{display:inline-flex;align-items:center;gap:.55rem;padding:.42rem 1rem;border-radius:999px;border:1px solid var(--border);background:rgba(22,27,34,.5);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-size:.82rem;color:var(--muted)}
.hero-badge .pulse-dot{width:7px;height:7px;border-radius:50%;background:var(--em);box-shadow:0 0 0 0 rgba(16,185,129,.55);animation:dotPulse 2.2s ease-out infinite}
.hero h1{font-size:clamp(2.15rem,5vw,3.4rem);margin:1.1rem auto .9rem;max-width:17ch}
.hero .lede{margin:0 auto;max-width:52ch}

.gauge-stage{position:relative;display:flex;flex-direction:column;align-items:center;padding:2.2rem 0 .6rem}
.gauge-stage::before{content:"";position:absolute;top:8%;left:50%;transform:translateX(-50%);width:min(560px,92vw);aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,rgba(16,185,129,.16),rgba(6,182,212,.05) 45%,transparent 68%);filter:blur(30px);pointer-events:none}
.gauge{position:relative;width:min(430px,88vw);aspect-ratio:1;z-index:1}
.gauge svg{width:100%;height:100%;overflow:visible}
.g-tick{stroke:rgba(230,237,243,.14);stroke-width:2;stroke-linecap:round}
.g-tick.major{stroke:rgba(230,237,243,.3)}
.g-label{fill:var(--dim);font-family:var(--mono);font-size:12.5px;font-weight:600;text-anchor:middle;dominant-baseline:middle}
.g-track{stroke:rgba(240,246,252,.07);stroke-width:13;fill:none;stroke-linecap:round}
.g-fill{stroke-width:13;fill:none;stroke-linecap:round;filter:drop-shadow(0 0 10px rgba(16,185,129,.5))}
.gauge[data-phase="upload"] .g-fill{filter:drop-shadow(0 0 10px rgba(6,182,212,.5))}
.gauge.pinging .g-track{animation:trackGlow 1.3s ease-in-out infinite}

.gauge-center{position:absolute;inset:0;display:grid;place-items:center;z-index:2}
.start-wrap{display:flex;flex-direction:column;align-items:center}
.start-hint{position:absolute;left:0;right:0;bottom:2px;text-align:center;margin:0;pointer-events:none}
.start-btn{position:relative;width:152px;height:152px;border-radius:50%;display:grid;place-items:center;
  background:radial-gradient(120% 120% at 30% 20%,rgba(52,211,153,.16),rgba(22,27,34,.85) 60%);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border:1.5px solid rgba(16,185,129,.55);
  color:var(--em-bright);font-weight:800;font-size:1.28rem;letter-spacing:.24em;text-indent:.24em;
  box-shadow:0 0 0 rgba(16,185,129,.4),inset 0 0 24px rgba(16,185,129,.09);
  transition:transform .25s ease,border-color .25s ease,box-shadow .3s ease,color .2s ease;
}
.start-btn::after{content:"";position:absolute;inset:-1.5px;border-radius:50%;border:1.5px solid rgba(16,185,129,.5);animation:ringPulse 2.4s ease-out infinite;pointer-events:none}
.start-btn:hover{transform:scale(1.045);border-color:var(--em-bright);color:#fff;box-shadow:0 0 44px rgba(16,185,129,.35),inset 0 0 30px rgba(16,185,129,.14)}
.start-hint{margin-top:.9rem;font-size:.85rem;color:var(--dim)}

.gauge-reading{text-align:center}
.gauge-phase{font-family:var(--mono);font-size:.74rem;font-weight:700;letter-spacing:.3em;text-transform:uppercase;color:var(--em-bright);margin-bottom:.3rem}
.gauge[data-phase="upload"] .gauge-phase{color:var(--cy-bright)}
.gauge[data-phase="ping"] .gauge-phase{color:var(--warn)}
.gauge-value{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(2.5rem,9vw,3.7rem);font-weight:700;line-height:1;letter-spacing:-.03em}
.gauge-unit{font-family:var(--mono);font-size:.95rem;color:var(--muted);margin-top:.35rem}

/* ---------- 10 · Test status / progress ---------- */
.test-status{display:inline-flex;align-items:center;gap:.6rem;padding:.5rem 1.1rem;border-radius:999px;border:1px solid var(--border);background:rgba(22,27,34,.55);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-size:.88rem;color:var(--muted);margin-top:1.1rem}
.test-status .dot{width:8px;height:8px;border-radius:50%;background:var(--dim);transition:background .3s}
.test-status.running .dot{background:var(--em);animation:blink 1s ease-in-out infinite}
.test-status.done .dot{background:var(--em)}
.trail-wrap{width:min(560px,92vw);margin:1.4rem auto 0}
.trail{height:6px;border-radius:999px;background:rgba(240,246,252,.06);overflow:hidden}
.trail-fill{height:100%;width:0%;border-radius:999px;background:var(--grad);box-shadow:0 0 12px rgba(16,185,129,.5);transition:width .3s ease}
.phase-chips{display:flex;justify-content:space-between;gap:.5rem;margin-top:.85rem;flex-wrap:wrap}
.phase-chip{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--mono);font-size:.72rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);padding:.34rem .7rem;border-radius:999px;border:1px solid transparent;transition:all .3s ease}
.phase-chip svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.phase-chip.active{color:var(--em-bright);border-color:rgba(16,185,129,.4);background:var(--em-soft)}
.phase-chip.done{color:var(--muted);border-color:var(--border)}
.phase-chip.done svg{color:var(--em)}

/* ---------- 11 · Network info bar ---------- */
.net-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding:.4rem 0;overflow:hidden}
.net-cell{padding:1.05rem 1.5rem;display:flex;flex-direction:column;gap:.28rem;position:relative}
.net-cell + .net-cell::before{content:"";position:absolute;left:0;top:22%;bottom:22%;width:1px;background:var(--border)}
.net-label{font-family:var(--mono);font-size:.68rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--dim);display:flex;align-items:center;gap:.45rem}
.net-label svg{width:13px;height:13px;stroke:var(--em);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.net-value{font-family:var(--mono);font-size:.98rem;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.skeleton{display:inline-block;min-width:110px;height:1em;border-radius:6px;background:linear-gradient(90deg,rgba(240,246,252,.06) 25%,rgba(240,246,252,.13) 50%,rgba(240,246,252,.06) 75%);background-size:200% 100%;animation:shimmer 1.4s linear infinite;color:transparent!important}

/* ---------- 12 · Metrics grid ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}
.metric{padding:1.35rem 1.45rem;position:relative;overflow:hidden}
.metric::before{content:"";position:absolute;inset:0;background:radial-gradient(140px 90px at 85% -20%,rgba(16,185,129,.12),transparent 70%);opacity:0;transition:opacity .4s ease;pointer-events:none}
.metric.cyan-glow::before{background:radial-gradient(140px 90px at 85% -20%,rgba(6,182,212,.13),transparent 70%)}
.metric.active{border-color:rgba(16,185,129,.55);box-shadow:0 0 0 1px rgba(16,185,129,.25),0 16px 40px -16px rgba(16,185,129,.3)}
.metric.cyan-glow.active{border-color:rgba(6,182,212,.55);box-shadow:0 0 0 1px rgba(6,182,212,.25),0 16px 40px -16px rgba(6,182,212,.3)}
.metric.active::before,.metric.done::before{opacity:1}
.metric-head{display:flex;align-items:center;gap:.7rem;margin-bottom:1rem}
.metric-head h3{font-size:.92rem;font-weight:600;color:var(--muted)}
.metric-val{display:flex;align-items:baseline;gap:.4rem}
.metric-val .val{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:2rem;font-weight:700;letter-spacing:-.02em;line-height:1}
.metric-unit{font-family:var(--mono);font-size:.82rem;color:var(--dim);font-weight:500}
.metric-sub{margin-top:.55rem;font-size:.78rem;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- 13 · Result banner ---------- */
.result-banner{margin-top:2.4rem;padding:2rem 2.2rem;animation:riseIn .6s cubic-bezier(.16,1,.3,1) both}
.rb-badge{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--mono);font-size:.7rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--em-bright);padding:.32rem .8rem;border-radius:999px;background:var(--em-soft)}
.rb-badge svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.result-banner h2{font-size:clamp(1.45rem,3vw,1.9rem);margin:.85rem 0 .45rem}
.result-banner p{color:var(--muted);max-width:60ch;margin-inline:auto}
.rb-chips{display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;margin:1.35rem 0 1.6rem}
.q-chip{display:inline-flex;align-items:center;gap:.5rem;font-size:.85rem;font-weight:600;padding:.5rem 1rem;border-radius:999px;border:1px solid var(--border)}
.q-chip svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.q-chip.ok{color:var(--em-bright);background:var(--em-soft);border-color:rgba(16,185,129,.3)}
.q-chip.warn{color:var(--warn);background:var(--warn-soft);border-color:rgba(251,191,36,.3)}
.rb-actions{display:flex;gap:.85rem;justify-content:center;flex-wrap:wrap}

/* ---------- 14 · Feature link cards (home) ---------- */
.feature-links{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.feature-link{display:flex;flex-direction:column;gap:.85rem;padding:1.5rem 1.6rem}
.feature-link h3{font-size:1.05rem}
.feature-link p{font-size:.9rem;color:var(--muted)}
.feature-link .go{margin-top:auto;display:inline-flex;align-items:center;gap:.4rem;font-size:.88rem;font-weight:600;color:var(--em-bright)}
.feature-link .go svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s ease}
.feature-link:hover .go svg{transform:translateX(4px)}

/* ---------- 15 · Guide steps ---------- */
.steps{display:flex;flex-direction:column;gap:0;position:relative;max-width:820px}
.step{display:grid;grid-template-columns:58px 1fr;gap:1.4rem;position:relative;padding-bottom:2.2rem}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:28px;top:58px;bottom:6px;width:2px;background:linear-gradient(180deg,rgba(16,185,129,.4),rgba(6,182,212,.12));border-radius:2px}
.step:last-child::before{display:none}
.step-num{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:1.15rem;color:var(--em-bright);border:1.5px solid rgba(16,185,129,.45);background:radial-gradient(120% 120% at 30% 20%,rgba(16,185,129,.14),rgba(22,27,34,.9) 65%);box-shadow:0 0 22px -6px rgba(16,185,129,.4)}
.step-body{padding-top:.35rem}
.step-body h3{font-size:1.16rem;margin-bottom:.45rem}
.step-body p{color:var(--muted);max-width:58ch}
.step-body .tip{margin-top:.8rem;display:flex;gap:.6rem;align-items:flex-start;font-size:.86rem;color:var(--em-bright);background:var(--em-soft);border:1px solid rgba(16,185,129,.25);border-radius:var(--radius-sm);padding:.7rem .95rem;max-width:58ch}
.step-body .tip svg{width:15px;height:15px;flex-shrink:0;margin-top:.18rem;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;max-width:920px}
.check-item{display:flex;gap:.85rem;align-items:flex-start;padding:1.1rem 1.25rem}
.check-item svg{width:19px;height:19px;flex-shrink:0;margin-top:.2rem;stroke:var(--em-bright);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.check-item h4{font-size:.97rem;margin-bottom:.25rem}
.check-item p{font-size:.87rem;color:var(--muted)}

/* ---------- 16 · FAQ accordion ---------- */
.acc-list{max-width:820px}
.acc{border:1px solid var(--border);border-radius:var(--radius);background:linear-gradient(180deg,rgba(240,246,252,.02),rgba(240,246,252,0) 50%),var(--surface);overflow:hidden;transition:border-color .3s ease}
.acc + .acc{margin-top:.85rem}
.acc.open{border-color:rgba(16,185,129,.4)}
.acc-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:1.2rem;text-align:left;padding:1.2rem 1.45rem;font-weight:600;font-size:1.02rem;transition:color .2s}
.acc-btn:hover{color:var(--em-bright)}
.acc.open .acc-btn{color:var(--em-bright)}
.acc-btn .chev{width:30px;height:30px;border-radius:9px;border:1px solid var(--border);display:grid;place-items:center;flex-shrink:0;transition:transform .35s cubic-bezier(.16,1,.3,1),border-color .3s,background .3s}
.acc-btn .chev svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.acc.open .chev{transform:rotate(180deg);border-color:rgba(16,185,129,.45);background:var(--em-soft)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.16,1,.3,1)}
.acc-panel-inner{padding:0 1.45rem 1.35rem;color:var(--muted);font-size:.95rem}
.acc-panel-inner strong{color:var(--text);font-weight:600}
.acc-panel-inner a{color:var(--em-bright);font-weight:500}
.acc-panel-inner a:hover{text-decoration:underline}

/* ---------- 17 · Help / troubleshooting ---------- */
.fix-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}
.fix-card{padding:1.6rem 1.7rem;display:flex;flex-direction:column;gap:1rem}
.fix-head{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem}
.fix-head-left{display:flex;align-items:center;gap:.8rem}
.fix-card h3{font-size:1.08rem}
.sev{font-family:var(--mono);font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;padding:.3rem .65rem;border-radius:999px;flex-shrink:0}
.sev.low{color:var(--em-bright);background:var(--em-soft)}
.sev.med{color:var(--warn);background:var(--warn-soft)}
.sev.high{color:var(--danger);background:var(--danger-soft)}
.cause-row{display:flex;flex-wrap:wrap;gap:.45rem}
.cause{font-size:.76rem;font-weight:500;color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:.28rem .7rem}
.fix-steps{display:flex;flex-direction:column;gap:.55rem}
.fix-steps li{display:flex;gap:.7rem;align-items:flex-start;font-size:.9rem;color:var(--muted)}
.fix-steps li b{color:var(--text);font-weight:600}
.fix-steps .n{font-family:var(--mono);font-size:.72rem;font-weight:700;color:var(--em-bright);width:22px;height:22px;border-radius:7px;background:var(--em-soft);display:grid;place-items:center;flex-shrink:0;margin-top:.1rem}
.flow{display:flex;align-items:stretch;gap:.6rem;flex-wrap:wrap}
.flow-step{flex:1;min-width:150px;padding:1rem 1.1rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:rgba(240,246,252,.02);text-align:center}
.flow-step .fs-n{font-family:var(--mono);font-size:.68rem;font-weight:700;letter-spacing:.16em;color:var(--em-bright);text-transform:uppercase;display:block;margin-bottom:.3rem}
.flow-step p{font-size:.85rem;color:var(--muted)}
.flow-arrow{display:grid;place-items:center;color:var(--dim);flex-shrink:0}
.flow-arrow svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 18 · About ---------- */
.mission{font-size:clamp(1.25rem,2.6vw,1.7rem);line-height:1.55;font-weight:500;color:var(--text);max-width:30ch}
.mission strong{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:700}
.stats-band{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}
.stat{padding:1.5rem 1.4rem;text-align:center}
.stat .stat-val{font-family:var(--mono);font-size:clamp(1.7rem,3.4vw,2.3rem);font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .stat-label{margin-top:.35rem;font-size:.82rem;color:var(--muted)}
.stack-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}
.stack-item{display:flex;gap:1rem;padding:1.45rem 1.5rem}
.stack-item h3{font-size:1.02rem;margin-bottom:.3rem}
.stack-item h3 code{font-family:var(--mono);font-size:.78rem;font-weight:600;color:var(--cy-bright);background:var(--cy-soft);padding:.14rem .5rem;border-radius:6px;margin-left:.45rem}
.stack-item p{font-size:.89rem;color:var(--muted)}
.arch-list{display:flex;flex-direction:column;gap:.9rem;max-width:820px}
.arch-row{display:grid;grid-template-columns:190px 1fr;gap:1.2rem;padding:1.15rem 1.4rem;align-items:baseline}
.arch-row .arch-k{font-family:var(--mono);font-size:.8rem;font-weight:700;letter-spacing:.06em;color:var(--em-bright)}
.arch-row p{font-size:.92rem;color:var(--muted)}

/* ---------- 19 · Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:1.4rem;align-items:start}
.form-card{padding:2rem 2.1rem}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
.field{display:flex;flex-direction:column;gap:.45rem}
.field.full{grid-column:1/-1}
.field label{font-size:.86rem;font-weight:600;color:var(--text)}
.field label span{color:var(--em-bright)}
.field input,.field select,.field textarea{background:var(--bg-2);border:1px solid var(--border-strong);border-radius:12px;padding:.8rem 1rem;color:var(--text);font-size:.95rem;transition:border-color .25s,box-shadow .25s;width:100%}
.field textarea{resize:vertical;min-height:130px}
.field input::placeholder,.field textarea::placeholder{color:var(--dim)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--em);box-shadow:0 0 0 3px rgba(16,185,129,.16)}
.field select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239BA7B4' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .95rem center;background-size:15px;cursor:pointer}
.field select:invalid{color:var(--dim)}
.field.err input,.field.err select,.field.err textarea{border-color:var(--danger);box-shadow:0 0 0 3px rgba(248,113,113,.13)}
.field-err{display:none;font-size:.78rem;color:var(--danger);font-weight:500}
.field.err .field-err{display:block}
.form-foot{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-top:.3rem}
.form-note{font-size:.78rem;color:var(--dim);max-width:34ch}
.success-card{padding:2.6rem 2.2rem;text-align:center;animation:riseIn .5s cubic-bezier(.16,1,.3,1) both}
.success-ico{width:64px;height:64px;border-radius:50%;margin:0 auto 1.2rem;display:grid;place-items:center;background:var(--em-soft);border:1.5px solid rgba(16,185,129,.5);box-shadow:0 0 34px -6px rgba(16,185,129,.45)}
.success-ico svg{width:28px;height:28px;stroke:var(--em-bright);fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.success-card h2{font-size:1.4rem;margin-bottom:.5rem}
.success-card p{color:var(--muted);max-width:44ch;margin:0 auto 1.5rem}
.support-stack{display:flex;flex-direction:column;gap:1.1rem}
.support-card{display:flex;gap:1rem;padding:1.35rem 1.45rem}
.support-card h3{font-size:.98rem;margin-bottom:.25rem}
.support-card p{font-size:.87rem;color:var(--muted)}
.support-card a{color:var(--em-bright);font-weight:600}
.support-card a:hover{text-decoration:underline}
.support-card .mono{font-family:var(--mono);font-size:.86rem}

/* ---------- 20 · CTA band ---------- */
.cta-band{padding:2.6rem 2.2rem;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(420px 190px at 50% -40%,rgba(16,185,129,.2),transparent 72%);pointer-events:none}
.cta-band h2{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:.55rem}
.cta-band p{color:var(--muted);margin-bottom:1.5rem}
.cta-band .btn{position:relative}

/* ---------- 21 · Footer ---------- */
.site-foot{margin-top:4.5rem;border-top:1px solid var(--border);background:rgba(13,17,23,.6);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2.4rem;padding:3.2rem 0 2.4rem}
.foot-brand p{margin-top:.9rem;font-size:.88rem;color:var(--muted);max-width:30ch}
.socials{display:flex;gap:.6rem;margin-top:1.2rem}
.socials a{width:36px;height:36px;border-radius:10px;border:1px solid var(--border);display:grid;place-items:center;color:var(--muted);transition:color .2s,border-color .2s,transform .2s}
.socials a:hover{color:var(--em-bright);border-color:rgba(16,185,129,.5);transform:translateY(-2px)}
.socials svg{width:16px;height:16px;fill:currentColor}
.foot-col h4{font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin-bottom:1rem;font-family:var(--mono)}
.foot-col ul{display:flex;flex-direction:column;gap:.6rem}
.foot-col a{font-size:.9rem;color:var(--muted);transition:color .2s}
.foot-col a:hover{color:var(--em-bright)}
.foot-base{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:1.4rem 0;border-top:1px solid var(--border);font-size:.82rem;color:var(--dim)}
.foot-base .demo-tag{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--mono);font-size:.72rem}
.foot-base .demo-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--em)}

/* ---------- 22 · Animations ---------- */
@keyframes pageIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes riseIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@keyframes ringPulse{0%{transform:scale(1);opacity:.8}70%{transform:scale(1.22);opacity:0}100%{transform:scale(1.22);opacity:0}}
@keyframes dotPulse{0%{box-shadow:0 0 0 0 rgba(16,185,129,.5)}70%{box-shadow:0 0 0 9px rgba(16,185,129,0)}100%{box-shadow:0 0 0 0 rgba(16,185,129,0)}}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
@keyframes shimmer{to{background-position:-200% 0}}
@keyframes trackGlow{0%,100%{stroke:rgba(240,246,252,.07)}50%{stroke:rgba(251,191,36,.22)}}
@keyframes rot{to{transform:rotate(360deg)}}
@keyframes ellipsis{0%,100%{opacity:.25}50%{opacity:1}}

/* ---------- 23 · Responsive ---------- */
@media (max-width:1020px){
  .metrics{grid-template-columns:repeat(2,1fr)}
  .fix-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .stats-band{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:920px){
  .nav-toggle{display:flex}
  .site-nav{position:fixed;top:var(--head-h);left:0;right:0;z-index:55;flex-direction:column;align-items:stretch;gap:.3rem;padding:1rem 4vw 1.4rem;margin:0;
    background:rgba(13,17,23,.93);-webkit-backdrop-filter:blur(20px) saturate(150%);backdrop-filter:blur(20px) saturate(150%);
    border-bottom:1px solid var(--border);
    transform:translateY(-10px);opacity:0;visibility:hidden;pointer-events:none;
    transition:transform .3s cubic-bezier(.16,1,.3,1),opacity .3s ease,visibility .3s;
  }
  .nav-open .site-nav{transform:none;opacity:1;visibility:visible;pointer-events:auto}
  .nav-link{padding:.8rem 1rem;border-radius:12px;font-size:1rem}
  .head-actions{margin-left:auto}
  .net-bar{grid-template-columns:repeat(2,1fr)}
  .net-cell:nth-child(3)::before{display:none}
  .net-cell:nth-child(1),.net-cell:nth-child(2){border-bottom:1px solid var(--border)}
  .feature-links{grid-template-columns:1fr}
  .stack-grid{grid-template-columns:1fr}
  .check-grid{grid-template-columns:1fr}
  .arch-row{grid-template-columns:1fr;gap:.3rem}
  .foot-grid{grid-template-columns:1fr 1fr;gap:2rem}
}
@media (max-width:560px){
  .head-cta{display:none}
  .section{padding:3.2rem 0}
  .metrics{grid-template-columns:1fr 1fr;gap:.8rem}
  .metric{padding:1.05rem 1.1rem}
  .metric-val .val{font-size:1.55rem}
  .net-bar{grid-template-columns:1fr 1fr}
  .net-cell{padding:.9rem 1.1rem}
  .net-value{font-size:.85rem}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:1.5rem 1.3rem}
  .stats-band{grid-template-columns:1fr 1fr;gap:.8rem}
  .step{grid-template-columns:44px 1fr;gap:1rem}
  .step-num{width:44px;height:44px;font-size:.95rem}
  .step::before{left:21px;top:46px}
  .phase-chips{justify-content:center}
  .flow-arrow{display:none}
  .flow-step{min-width:100%}
  .foot-grid{grid-template-columns:1fr;gap:1.8rem;padding:2.4rem 0 1.8rem}
  .foot-base{flex-direction:column;align-items:flex-start}
}

/* ---------- 24 · Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;animation-iteration-count:1!important;transition-duration:.001s!important}
  html{scroll-behavior:auto}
}