:root{--bg:#0b1020;--panel:#121a33;--ink:#e8ecf8;--mute:#9aa6c7;--acc:#5eead4;--acc2:#a78bfa;--bad:#f87171;--ok:#4ade80;--warn:#fbbf24;--line:#24305a}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--acc)}a:hover{color:#99f6e4}
.wrap{max-width:980px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:#0d1430}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none;letter-spacing:.3px}.logo span{color:var(--acc)}
nav a{color:var(--mute);text-decoration:none;margin-left:16px}nav a:hover{color:var(--ink)}
.preview{background:#3b2f0b;color:#fde68a;text-align:center;font-size:.85rem;padding:6px}
main{padding:32px 0 48px}
h1{font-size:2rem;line-height:1.25;margin:.2em 0 .4em}h2{margin-top:1.8em}
.lead{color:var(--mute);font-size:1.1rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}
.card h3{margin:.1em 0 .4em}.card p{color:var(--mute);margin:.3em 0}
.tag{display:inline-block;font-size:.75rem;border:1px solid var(--line);border-radius:999px;padding:1px 8px;color:var(--mute)}
form.tool{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;margin:18px 0}
label{display:block;font-weight:600;margin:10px 0 4px}
input[type=text],input[type=url],input[type=email],textarea,select{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--line);background:#0b1226;color:var(--ink);font:inherit}
textarea{min-height:90px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:640px){.row{grid-template-columns:1fr}}
button,.btn{display:inline-block;background:var(--acc);color:#04211d;border:0;border-radius:8px;padding:10px 18px;font-weight:700;cursor:pointer;text-decoration:none;font:inherit;font-weight:700}
button.sec,.btn.sec{background:transparent;color:var(--acc);border:1px solid var(--acc)}
button:disabled{opacity:.5;cursor:not-allowed}
.checks{display:flex;flex-wrap:wrap;gap:6px 14px}.checks label{font-weight:400;margin:0;display:flex;gap:6px;align-items:center}
.result{margin-top:18px}
table{width:100%;border-collapse:collapse;font-size:.92rem}th,td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line);vertical-align:top;word-break:break-word}
.ok{color:var(--ok)}.bad{color:var(--bad)}.warn{color:var(--warn)}.mute{color:var(--mute)}
.score{font-size:2.4rem;font-weight:800}
.cta{background:linear-gradient(135deg,#123a3a,#2a1f4d);border:1px solid var(--line);border-radius:12px;padding:18px;margin:24px 0}
.cta p{margin:.3em 0}
pre.out{white-space:pre-wrap;background:#0b1226;border:1px solid var(--line);border-radius:8px;padding:12px;max-height:520px;overflow:auto}
.note{font-size:.88rem;color:var(--mute)}
footer.site{border-top:1px solid var(--line);color:var(--mute);font-size:.88rem;padding:24px 0}
footer.site a{color:var(--mute);margin-right:14px}
.ph{border:1px dashed var(--warn);border-radius:12px;padding:16px;margin:16px 0}
.hl{color:var(--acc)}.mt{margin-top:24px}

/* accessibility */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:8px;top:-60px;z-index:10;background:var(--acc);color:#0b1020;padding:8px 14px;border-radius:6px;font-weight:700;text-decoration:none}
.skip:focus{top:8px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--acc);outline-offset:2px;border-radius:3px}
main:focus{outline:none}
h2.h3{font-size:1.17em;margin-top:1.2em}
main a{text-decoration:underline;text-underline-offset:2px}
.card h3 a,.card h2 a{text-decoration:none}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}