:root{
  --bg:#F7F8FA; --card:#FFFFFF; --text:#111827; --text2:#687386;
  --border:#E6E9EF; --accent:#2457F5; --ok:#16885B; --err:#C1382B; --warn:#B7791F;
  --radius:10px;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;}
html{scroll-padding-top:env(safe-area-inset-top,0px);}
html,body{height:100%;}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:'DM Sans', -apple-system, sans-serif;
  font-size:15px; line-height:1.55;
}
.mono{font-family:'DM Mono', ui-monospace, monospace;}
.wrap{max-width:920px; margin:0 auto; padding:0 24px;}

header{
  position:sticky; top:env(safe-area-inset-top,0px);
  background:rgba(247,248,250,0.92); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border); z-index:10;
}
.header-inner{
  max-width:920px; margin:0 auto; padding:0 24px;
  height:66px; display:flex; align-items:center; justify-content:space-between;
}
.brand{display:flex; align-items:center; gap:10px; font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:17px;}
nav{display:flex; align-items:center; gap:20px;}
.nav-links{display:flex; gap:24px;}
nav a{color:var(--text2); text-decoration:none; font-size:14px;}
nav a:hover{color:var(--text);}
.lang-toggle{
  border:1px solid var(--border); background:transparent; color:var(--text2);
  font-family:'DM Mono',monospace; font-size:12px; padding:5px 9px; border-radius:6px;
  cursor:pointer; transition:border-color 150ms, color 150ms;
}
.lang-toggle:hover{border-color:var(--accent); color:var(--accent);}
.status-pill{display:flex; align-items:center; gap:6px; font-size:13px; color:var(--text2); white-space:nowrap;}
.dot{width:6px; height:6px; border-radius:50%; background:var(--text2);}
.dot.ok{background:var(--ok);}
.dot.err{background:var(--err);}
.dot.warn{background:var(--warn);}
@media (max-width:640px){ .nav-links{display:none;} }

.hero{padding:72px 0 40px;}
.eyebrow{color:var(--text2); font-size:13px; margin-bottom:14px;}
h1{
  font-family:'Space Grotesk',sans-serif; font-weight:600;
  font-size:40px; line-height:1.15; margin:0 0 16px; letter-spacing:-0.01em;
  max-width:540px;
}
.sub{color:var(--text2); font-size:16px; max-width:480px; margin:0 0 36px;}

.checker{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  padding:22px; max-width:640px;
}
.checker-label{display:block; font-size:13px; color:var(--text2); margin-bottom:10px;}
.checker-row{display:flex; gap:10px;}
input#target{
  flex:1; min-width:0; border:1px solid var(--border); border-radius:8px; padding:12px 14px;
  font-family:'DM Mono',monospace; font-size:14px; background:var(--bg); color:var(--text);
}
input#target:focus{outline:2px solid var(--accent); outline-offset:1px; background:#fff;}
button#checkBtn{
  border:none; background:var(--text); color:#fff; padding:0 22px; border-radius:8px;
  font-family:'DM Sans',sans-serif; font-weight:500; font-size:14px; cursor:pointer;
  transition:background 150ms; white-space:nowrap;
}
button#checkBtn:hover{background:#000;}
button#checkBtn:disabled{background:#9AA3B2; cursor:default;}
.checker-tags{display:flex; gap:18px; margin-top:16px; color:var(--text2); font-size:13px;}

.stages{display:none; gap:22px; margin-top:18px; padding-top:16px; border-top:1px solid var(--border);}
.stages.show{display:flex;}
.stage{display:flex; flex-direction:column; gap:3px; font-size:13px;}
.stage-name{color:var(--text2); font-family:'DM Mono',monospace; font-size:11.5px;}
.stage-val{font-family:'DM Mono',monospace;}
.stage.pending .stage-val{color:var(--text2);}
.stage.ok .stage-val{color:var(--ok);}
.stage.err .stage-val{color:var(--err);}

.result{margin-top:18px; padding-top:18px; border-top:1px solid var(--border); display:none;}
.result.show{display:block; animation:fade 200ms ease;}
@keyframes fade{from{opacity:0} to{opacity:1}}
.result-head{display:flex; align-items:center; gap:8px; font-weight:500; margin-bottom:14px;}
.result-head .dot{width:7px;height:7px;}
table.result-table{width:100%; border-collapse:collapse; font-size:14px;}
table.result-table td{padding:7px 0; border-bottom:1px solid var(--border);}
table.result-table tr:last-child td{border-bottom:none;}
table.result-table td:first-child{color:var(--text2); width:170px;}
table.result-table td:last-child{font-family:'DM Mono',monospace; text-align:right;}
.tls-block{margin-top:16px; padding-top:16px; border-top:1px solid var(--border);}
.tls-title{font-size:13px; color:var(--text2); margin-bottom:8px;}
.note{font-size:12.5px; color:var(--text2); margin-top:14px; line-height:1.5;}

section{padding:52px 0;}
h2{font-family:'Space Grotesk',sans-serif; font-size:22px; font-weight:600; margin:0 0 8px;}
.section-sub{color:var(--text2); font-size:14.5px; margin:0 0 28px; max-width:480px;}

.tools{display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--border); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden;}
.tool{background:var(--card); padding:22px;}
.tool h3{font-size:15px; margin:0 0 6px; font-weight:600;}
.tool p{color:var(--text2); font-size:13.5px; margin:0;}
.soon{color:#9AA3B2; font-size:12px;}
@media (max-width:640px){ .tools{grid-template-columns:1fr;} }

.about p{color:var(--text2); max-width:560px; font-size:14.5px;}

footer{border-top:1px solid var(--border); padding:32px 0; margin-top:20px;}
.footer-inner{display:flex; justify-content:space-between; align-items:flex-start; flex-wrap:wrap; gap:20px;}
.footer-brand{font-family:'Space Grotesk',sans-serif; font-weight:600;}
.footer-sub{color:var(--text2); font-size:13px; margin-top:4px;}
.footer-links{display:flex; gap:20px;}
.footer-links a{color:var(--text2); text-decoration:none; font-size:13px;}
.footer-links a:hover{color:var(--text);}
.copyright{color:var(--text2); font-size:12.5px; margin-top:24px;}

:focus-visible{outline:2px solid var(--accent); outline-offset:2px;}

@media (max-width:640px){
  .checker-row{flex-direction:column;}
  button#checkBtn{width:100%; padding:12px;}
  h1{font-size:30px;}
  table.result-table td:first-child{width:auto;}
}

@media (prefers-reduced-motion: reduce){ *{animation:none !important; transition:none !important;} }