:root{--bg:#0b0d12;--bg2:#0f1219;--card:#141824;--card2:#1b2133;--bd:#262d41;--fg:#eef0f6;--mut:#9aa3b8;--acc:#8794ff;--acc2:#b48bff;--good:#34d399;--bad:#f87171;--r:16px;--sh:0 10px 30px rgba(0,0,0,.35)}
@media(prefers-color-scheme:light){:root{--bg:#f5f6fb;--bg2:#eceef7;--card:#fff;--card2:#f3f4fb;--bd:#e2e5f0;--fg:#12151f;--mut:#5a6478;--acc:#4a56d6;--acc2:#8b5cf6;--good:#047857;--bad:#c81e1e;--sh:0 10px 30px rgba(30,40,90,.08)}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;color:var(--fg);font:16px/1.65 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:radial-gradient(1100px 520px at 12% -8%,color-mix(in srgb,var(--acc) 22%,transparent),transparent),radial-gradient(900px 480px at 100% 0,color-mix(in srgb,var(--acc2) 16%,transparent),transparent),var(--bg);min-height:100vh}
.wrap{max-width:1040px;margin:0 auto;padding:0 1.3rem}
header{position:sticky;top:0;z-index:5;backdrop-filter:blur(12px);background:color-mix(in srgb,var(--bg) 78%,transparent);border-bottom:1px solid var(--bd)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:800;letter-spacing:-.02em;font-size:1.15rem;color:var(--fg);text-decoration:none;display:flex;align-items:center;gap:.5rem}
.logo i{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--acc),var(--acc2));display:inline-block}
nav a{color:var(--mut);text-decoration:none;margin-left:1.2rem;font-size:.93rem;font-weight:500}nav a:hover{color:var(--fg)}
.hero{padding:4.2rem 0 2rem}
.hero h1{font-size:clamp(2.2rem,6vw,3.6rem);line-height:1.08;letter-spacing:-.035em;margin:0 0 1rem;font-weight:800}
.hero h1 span{background:linear-gradient(90deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--mut);font-size:1.2rem;max-width:660px;margin:0}
section{padding:2.6rem 0;scroll-margin-top:70px}
h2{font-size:1.65rem;letter-spacing:-.02em;margin:0 0 .4rem}h3{margin:0 0 .5rem;font-size:1.05rem}
.sub{color:var(--mut);margin:0 0 1.4rem;max-width:680px}
.card{background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:1.3rem;box-shadow:var(--sh)}
textarea{width:100%;min-height:11rem;resize:vertical;background:var(--bg2);color:var(--fg);border:1px solid var(--bd);border-radius:12px;padding:1rem;font:inherit;line-height:1.6}
textarea:focus,select:focus,button:focus-visible,summary:focus-visible,a:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.bar{display:flex;gap:.7rem;align-items:center;flex-wrap:wrap;margin-top:.9rem}
.seg{display:inline-flex;background:var(--bg2);border:1px solid var(--bd);border-radius:11px;padding:3px}
.seg button{background:none;border:0;color:var(--mut);padding:.4rem .8rem;border-radius:8px;font:inherit;font-size:.9rem;cursor:pointer}
.seg button[aria-pressed=true]{background:var(--card2);color:var(--fg);box-shadow:0 0 0 1px var(--bd)}
.btn{font:inherit;font-weight:650;border-radius:11px;padding:.65rem 1.15rem;cursor:pointer;border:1px solid var(--bd);background:var(--card2);color:var(--fg)}
.btn:hover{border-color:var(--acc)}
.btn.primary{border:0;color:#fff;background:linear-gradient(135deg,var(--acc),var(--acc2))}.btn.primary:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.55;cursor:wait}.spacer{flex:1}
.msg{color:var(--mut);font-size:.92rem}.msg.err{color:var(--bad)}
.results{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1.2rem}
@media(max-width:800px){.results{grid-template-columns:1fr}nav a:not(:last-child){display:none}}
.meter{margin:.4rem 0 1rem}.meter .top{display:flex;align-items:baseline;gap:.6rem;flex-wrap:wrap}
.meter .num{font-size:2.6rem;font-weight:800;letter-spacing:-.04em;line-height:1}.meter .num small{font-size:1rem;color:var(--mut);font-weight:500}
.verdict{font-weight:700;font-size:.95rem}.meter[data-s=pass] .verdict{color:var(--good)}.meter[data-s=fail] .verdict{color:var(--bad)}
.track{position:relative;height:10px;border-radius:99px;background:var(--bg2);border:1px solid var(--bd);margin-top:.7rem;overflow:hidden}
.track i{position:absolute;inset:0 auto 0 0;border-radius:99px;transition:width .5s}
.meter[data-s=pass] .track i{background:var(--good)}.meter[data-s=fail] .track i{background:var(--bad)}
.track b{position:absolute;left:70%;top:-2px;bottom:-2px;width:2px;background:var(--mut);opacity:.7}
.tl{display:flex;justify-content:space-between;font-size:.75rem;color:var(--mut);margin-top:.3rem}
ul.issues{list-style:none;margin:.6rem 0 0;padding:0;display:grid;gap:.45rem;font-size:.92rem}
ul.issues li{background:var(--bg2);border:1px solid var(--bd);border-left:3px solid var(--bad);border-radius:8px;padding:.5rem .7rem}
ul.issues.warn li{border-left-color:#fbbf24}
.empty{color:var(--mut);font-size:.95rem;margin:.3rem 0 0}
.rtxt{min-height:9rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem}
.chk b{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-size:.85rem;margin-bottom:.6rem}
.chk p{margin:0;color:var(--mut);font-size:.93rem}.tag{font-size:.74rem;color:var(--mut);border:1px solid var(--bd);border-radius:99px;padding:.1rem .55rem;margin-left:.3rem;white-space:nowrap}
.note{border:1px solid color-mix(in srgb,var(--acc) 40%,var(--bd));background:color-mix(in srgb,var(--acc) 9%,var(--card));border-radius:12px;padding:.8rem 1rem;color:var(--fg);font-size:.95rem}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
code{background:var(--card2);padding:.12em .4em;border-radius:6px;font-size:.88em}
.snip{position:relative;margin:.8rem 0}.snip pre{margin:0;background:var(--bg2);border:1px solid var(--bd);border-radius:12px;padding:1rem 4.5rem 1rem 1rem;overflow:auto;font-size:.84rem;line-height:1.55}
.snip pre code{background:none;padding:0;font-size:inherit}.snip .btn{position:absolute;top:.5rem;right:.5rem;padding:.25rem .6rem;font-size:.78rem}
.snip small{display:block;color:var(--mut);margin-bottom:.3rem;font-weight:600}
details.d{background:var(--card);border:1px solid var(--bd);border-radius:12px;margin:.7rem 0;padding:.2rem 1rem}
details.d summary{cursor:pointer;padding:.7rem 0;font-weight:650}details.d[open] summary{border-bottom:1px solid var(--bd);margin-bottom:.7rem}
details.d pre{margin:0 0 1rem;max-height:520px;overflow:auto;background:var(--bg2);border:1px solid var(--bd);border-radius:10px;padding:1rem;font-size:.8rem;line-height:1.5}
ul.lim{padding-left:1.1rem;color:var(--mut)}ul.lim b{color:var(--fg)}ul.lim li{margin:.45rem 0}
table{width:100%;border-collapse:collapse;font-size:.94rem}th,td{border-bottom:1px solid var(--bd);padding:.6rem .5rem;text-align:left;vertical-align:top}th{color:var(--mut);font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em}
a{color:var(--acc)}footer{padding:2.5rem 0 4rem;color:var(--mut);font-size:.88rem;border-top:1px solid var(--bd);margin-top:2rem}