:root{
  --bg:#f5f7fb; --surface:#ffffff; --surface2:#eef1f7; --border:#e3e8f0;
  --ink:#0b1526; --ink2:#4a5a70; --ink3:#8494ab;
  --brand:#4f46e5; --brand2:#4338ca; --brand-soft:#eef0ff;
  --ok:#16a34a; --ok2:#15803d; --ok-soft:#e9f9ef;
  --bad:#dc2626; --bad2:#b91c1c; --bad-soft:#fdecec;
  --warn:#d97706; --warn2:#b45309; --warn-soft:#fdf3e2;
  --ring:rgba(79,70,229,.35);
  --radius:14px; --shadow:0 1px 2px rgba(11,21,38,.06),0 8px 24px -12px rgba(11,21,38,.12);
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-display:'Space Grotesk',var(--font-body);
  --font-mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;
}
[data-theme="dark"]{
  --bg:#0a101d; --surface:#101a2c; --surface2:#182338; --border:#233149;
  --ink:#e8eef8; --ink2:#aebdd2; --ink3:#71809a;
  --brand:#8b93ff; --brand2:#a5abff; --brand-soft:#1c2050;
  --ok:#3ecf72; --ok2:#7ee2a8; --ok-soft:rgba(62,207,114,.13);
  --bad:#ff6b6b; --bad2:#ffa1a1; --bad-soft:rgba(255,107,107,.13);
  --warn:#ffb224; --warn2:#ffd07a; --warn-soft:rgba(255,178,36,.13);
  --ring:rgba(139,147,255,.4);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 12px 32px -16px rgba(0,0,0,.6);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font:400 16px/1.6 var(--font-body);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  min-height:100dvh;display:flex;flex-direction:column;
  transition:background .25s,color .25s;
}
h1,h2{font-family:var(--font-display);letter-spacing:-.02em;line-height:1.15}
code{font-family:var(--font-mono)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:var(--brand)}
:focus-visible{outline:3px solid var(--ring);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.muted{color:var(--ink2)} .small{font-size:.85rem}
.container{width:min(1060px,92%);margin-inline:auto}

.site-head{width:min(1060px,92%);margin:0 auto;padding:14px 0;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.2rem;color:var(--ink);text-decoration:none}
.logo-accent{color:var(--brand)}
.logo-dot{width:10px;height:10px;border-radius:50%;background:var(--ok);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 var(--ok-soft)}70%{box-shadow:0 0 0 9px transparent}100%{box-shadow:0 0 0 0 transparent}}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border-radius:10px;padding:12px 22px;transition:background .15s,transform .05s}
.btn:active{transform:scale(.98)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand2)}
[data-theme="dark"] .btn-brand{color:#0a101d}
.btn-ghost{border:1px solid var(--border);background:var(--surface);color:var(--ink2);padding:8px 14px;font-size:.85rem}
.btn-ghost:hover{background:var(--surface2);color:var(--ink)}
.btn.icon{padding:9px;border-radius:50%}
.chip{background:var(--surface2);color:var(--ink2);border-radius:999px;padding:6px 14px;font-size:.82rem;font-family:var(--font-mono);transition:background .15s,color .15s}
.chip:hover{background:var(--brand-soft);color:var(--brand)}


.hero{padding:clamp(14px,2.5vw,30px) 0 clamp(28px,5vw,48px);text-align:center}
.hero h1{font-size:clamp(1.9rem,4.5vw + .5rem,3.2rem);font-weight:700}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero .sub{max-width:560px;margin:14px auto 28px;color:var(--ink2);font-size:clamp(.95rem,1.4vw,1.08rem)}
.check-form{display:flex;gap:10px;max-width:620px;margin:0 auto}
.check-form input{
  flex:1;min-width:0;font:500 1rem var(--font-mono);color:var(--ink);
  background:var(--surface);border:1px solid var(--border);border-radius:12px;
  padding:14px 18px;box-shadow:var(--shadow);transition:border-color .15s;
}
.check-form input::placeholder{color:var(--ink3);font-family:var(--font-body);font-weight:400}
.check-form input:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px var(--ring)}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:18px}

.result{margin:8px 0 40px}
.verdict{border:1px solid var(--border);border-radius:var(--radius);padding:clamp(18px,3.5vw,28px);box-shadow:var(--shadow);background:var(--surface);animation:rise .35s ease}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.v-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.v-top h2{font-size:clamp(1.15rem,2.6vw,1.55rem)}
.v-dot{width:14px;height:14px;border-radius:50%;flex:none}
.v-host{font-size:.95rem;color:var(--ink2);background:var(--surface2);padding:3px 10px;border-radius:8px}
.v-text{margin:12px 0 6px;color:var(--ink2);max-width:70ch}
.v-meta{font-family:var(--font-mono);font-size:.78rem;color:var(--ink3);margin-bottom:14px}
.v-actions{display:flex;gap:10px;flex-wrap:wrap}
.v-up{background:var(--ok-soft);border-color:color-mix(in srgb,var(--ok) 40%,var(--border))}
.v-up .v-dot{background:var(--ok)} .v-up h2{color:var(--ok2)}
.v-down{background:var(--bad-soft);border-color:color-mix(in srgb,var(--bad) 40%,var(--border))}
.v-down .v-dot{background:var(--bad)} .v-down h2{color:var(--bad2)}
.v-warn{background:var(--warn-soft);border-color:color-mix(in srgb,var(--warn) 40%,var(--border))}
.v-warn .v-dot{background:var(--warn)} .v-warn h2{color:var(--warn2)}

.stages{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.stage{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px 16px;animation:rise .4s ease backwards}
.stage:nth-child(2){animation-delay:.08s}.stage:nth-child(3){animation-delay:.16s}
.s-ico{width:34px;height:34px;flex:none;border-radius:50%;display:grid;place-items:center}
.stage.ok .s-ico{background:var(--ok-soft);color:var(--ok)}
.stage.bad .s-ico{background:var(--bad-soft);color:var(--bad)}
.stage.warn .s-ico{background:var(--warn-soft);color:var(--warn)}
.stage strong{display:block;font-size:.9rem}
.stage small{color:var(--ink3);font-size:.76rem}
.stage code{margin-left:auto;font-size:.8rem;color:var(--ink2)}

.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:56px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow)}
.card h2{font-size:1.05rem;margin-bottom:14px}
.how{padding-left:20px;color:var(--ink2);display:grid;gap:8px;font-size:.92rem}
.recent{list-style:none;display:grid;gap:4px}
.recent li{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;cursor:pointer;font-size:.9rem}
.recent li:hover{background:var(--surface2)}
.r-dot{width:9px;height:9px;border-radius:50%;flex:none}
.r-dot.up{background:var(--ok)} .r-dot.down{background:var(--bad)} .r-dot.warn{background:var(--warn)}
.recent .r-host{font-family:var(--font-mono);font-size:.85rem}
.recent .r-time{margin-left:auto;color:var(--ink3);font-size:.76rem;font-family:var(--font-mono)}

.fixes{margin-top:14px}
.fixes details{border-top:1px solid var(--border);padding:10px 2px}
.fixes summary{cursor:pointer;font-weight:600;font-size:.92rem;list-style:none;display:flex;justify-content:space-between;align-items:center}
.fixes summary::after{content:"+";color:var(--ink3);font-size:1.1rem}
.fixes details[open] summary::after{content:"–"}
.fixes p{color:var(--ink2);font-size:.88rem;margin-top:8px}
.fixes code{font-size:.8rem;background:var(--surface2);padding:2px 7px;border-radius:6px}

.loading{display:flex;align-items:center;gap:14px;padding:22px;color:var(--ink2);font-size:.95rem}
.spin{width:22px;height:22px;flex:none;border:3px solid var(--surface2);border-top-color:var(--brand);border-radius:50%;animation:rot .8s linear infinite}
@keyframes rot{to{transform:rotate(360deg)}}

.site-foot{margin-top:auto;padding:26px 0 34px;color:var(--ink3);font-size:.83rem;text-align:center}

@media (max-width:760px){
  .stages{grid-template-columns:1fr}
  .cols{grid-template-columns:1fr}
  .check-form{flex-direction:column}
  .check-form .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}





/* ============ PROFESSIONAL FOOTER ============ */
.site-foot{
  margin-top:auto; background:var(--surface); border-top:1px solid var(--border);
  padding:60px 0 30px; transition:background .25s, border-color .25s;
}
.foot-grid{ display:grid; grid-template-columns: 2fr 1fr 1fr; gap:40px; margin-bottom:40px; }
.foot-brand{ max-width:320px; }
.foot-brand p{ color:var(--ink2); font-size:.9rem; line-height:1.7; margin-top:12px; }
.foot-col h3{ font-family:var(--font-display); font-size:.95rem; font-weight:600; margin-bottom:16px; color:var(--ink); text-transform:uppercase; letter-spacing:.04em; }
.foot-col ul{ list-style:none; }
.foot-col li{ margin-bottom:10px; }
.foot-col a{ color:var(--ink2); font-size:.9rem; text-decoration:none; transition:color .15s; }
.foot-col a:hover{ color:var(--brand); }
.foot-bottom{
  border-top:1px solid var(--border); padding-top:24px; 
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px;
  font-size:.82rem; color:var(--ink3);
}
.foot-bottom a{ color:var(--ink3); text-decoration:none; margin-left:20px; }
.foot-bottom a:hover{ color:var(--brand); }
@media (max-width: 760px){
  .foot-grid{ grid-template-columns: 1fr; gap:30px; text-align:center; }
  .foot-brand{ max-width:100%; margin:0 auto; }
  .foot-bottom{ flex-direction:column; text-align:center; }
  .foot-bottom a{ margin:0 10px; }
}





/* ============ SEO CONTENT ============ */
.seo-content{display:grid;gap:16px;margin:0 0 56px}
.seo-card h2{font-size:clamp(1.25rem,2.6vw,1.65rem);margin-bottom:14px}
.seo-card h3{font-family:var(--font-display);font-size:1.05rem;margin:22px 0 8px;color:var(--ink)}
.seo-card p{color:var(--ink2);font-size:.95rem;line-height:1.75;margin-bottom:10px}
.seo-card ul,.seo-card ol{padding-left:20px;color:var(--ink2);font-size:.95rem;line-height:1.75;display:grid;gap:6px}
.seo-card a{color:var(--brand);text-decoration:none}
.seo-card a:hover{text-decoration:underline}