:root{
  --paper:#FFFFFF; --card:#FFFFFF; --band:#F5F7FA; --ink:#0F1F3D; --slate:#55637A; --rule:#E3E7EE; --faint:#EEF1F6;
  --verify:#1A7F5A; --verify-soft:#E6F4EE; --warn:#A8690F; --err:#B23A2E; --accent:#1F4FD8;
  --sans:"IBM Plex Sans",system-ui,sans-serif; --mono:"IBM Plex Mono",ui-monospace,monospace;
  --shadow:0 1px 2px rgba(27,42,65,.05),0 10px 28px -14px rgba(27,42,65,.18);
}
*{box-sizing:border-box}
html{font-size:17px;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.5}
a{color:var(--ink);text-decoration-thickness:1px;text-underline-offset:3px}
h1{font-size:clamp(2rem,4.2vw,3rem);font-weight:600;letter-spacing:-.03em;line-height:1.08;margin:0 0 .9rem;max-width:18ch}
h2{font-size:1.3rem;font-weight:600;letter-spacing:-.015em;margin:0 0 .6rem}
h3{font-size:1.02rem;font-weight:600;margin:0 0 .35rem}
p{margin:0 0 .9rem;max-width:62ch}
.lede{font-size:1.12rem;color:var(--slate);max-width:56ch}
.muted{color:var(--slate)} .small{font-size:.9rem} .note{color:var(--slate);font-size:.92rem}
.eyebrow{font-size:.85rem;font-weight:600;color:var(--accent);margin:0 0 .6rem}
.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums}
code{font-family:var(--mono);font-size:.9em;background:var(--faint);padding:.1em .35em;border-radius:4px}
pre{background:#fff;border:1px solid var(--rule);border-radius:8px;padding:1rem 1.1rem;overflow-x:auto;font-family:var(--mono);font-size:.85rem;line-height:1.5}
pre code{background:none;padding:0}

/* header */
.top{display:flex;justify-content:space-between;align-items:center;max-width:60rem;margin:0 auto;padding:1.1rem 1.5rem;border-bottom:1px solid var(--rule)}
.brand{display:inline-flex;align-items:center;gap:.55rem;font-weight:700;text-decoration:none;letter-spacing:-.01em;font-size:1.05rem}
.top nav{display:flex;align-items:center;gap:1.4rem}
.top nav a{color:var(--slate);text-decoration:none;font-weight:500;font-size:.95rem}
.top nav a:hover{color:var(--ink)}
.lang{display:inline-flex;border:1px solid var(--rule);border-radius:6px;overflow:hidden;font-size:.8rem;margin-left:.4rem}
.top nav .lang a,.lang b{padding:.25rem .55rem;font-weight:600;font-size:.8rem;line-height:1.2;text-decoration:none}
.lang b{background:var(--ink);color:#fff}
.lang a{color:var(--slate)}
main{max-width:60rem;margin:0 auto;padding:0 1.5rem 3rem}
section{padding:2.75rem 0}
section+section{border-top:1px solid var(--rule)}
.page{padding-top:2rem} .narrow{max-width:46rem}

/* hero + converter */
.hero{padding-top:2.5rem;border-top:0}
.hero-text{margin-bottom:1.5rem}
.under{margin:1.1rem 0 0;color:var(--slate);font-size:.95rem;max-width:66ch}
.drop{width:100%;background:var(--card);border:1px solid var(--rule);border-radius:12px;box-shadow:var(--shadow);padding:1rem}
.drop-face{display:flex;flex-direction:column;align-items:center;text-align:center;gap:.25rem;padding:2.2rem 1.25rem 1.9rem;border:1.5px dashed #C3CBD8;border-radius:9px;background:var(--band);cursor:pointer}
.drop-face.over{background:var(--verify-soft);border-color:var(--verify)}
.drop-face:focus-within{outline:2px solid var(--verify);outline-offset:2px}
.drop-art{display:block;margin-bottom:.2rem}
.btn-big{display:inline-block;background:var(--ink);color:#fff;font-weight:600;padding:.7rem 1.4rem;border-radius:8px;font-size:1rem;margin:.35rem 0 .15rem;border:0;cursor:pointer;text-decoration:none}
.drop-face:hover .btn-big,.btn-big:hover{background:#243a5a}
.drop-sub{color:var(--slate);font-size:.95rem}
.drop-meta{margin-top:.7rem;font-size:.88rem;color:var(--verify);font-weight:500}
.drop-opts{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;margin-top:.8rem}
.fmtsel{display:flex;align-items:center;gap:.5rem;font-size:.92rem;color:var(--slate)}
.fmtsel select{font:inherit;font-size:.9rem;padding:.4rem .6rem;border:1px solid var(--rule);border-radius:6px;background:#fff;color:var(--ink)}
.keyfield{display:flex;align-items:center;gap:.5rem;font-size:.92rem;color:var(--slate)}
.keyfield input{font-family:var(--mono);font-size:.86rem;padding:.4rem .6rem;border:1px solid var(--rule);border-radius:6px;width:12rem;background:#fff;color:var(--ink)}
.status{min-height:1.3rem;margin:.6rem 0 0;font-size:.93rem;font-weight:500}
.status.ok{color:var(--verify)} .status.warn{color:var(--warn)} .status.err{color:var(--err)}

/* review panel */
.review{width:100%;margin-top:1rem;background:#fff;border:1px solid var(--rule);border-radius:12px;box-shadow:var(--shadow);text-align:left;overflow:hidden}
.review-head{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1rem 1.1rem;border-bottom:1px solid var(--rule);flex-wrap:wrap}
.review-head strong{font-size:1.05rem}
.review-head .btn-big{margin:0;padding:.6rem 1.1rem;font-size:.95rem}
.review-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(7.5rem,1fr));gap:.5rem;padding:.9rem 1.1rem;background:var(--band);border-bottom:1px solid var(--rule)}
.review-stats div{display:flex;flex-direction:column}
.review-stats span{font-size:.75rem;color:var(--slate)}
.review-stats strong{font-family:var(--mono);font-size:.95rem;white-space:nowrap}
.review-stats strong.ok{color:var(--verify)} .review-stats strong.warn{color:var(--warn)}
.review-table{overflow-x:auto}
.review-table table{border:0;border-radius:0;font-size:.82rem}
.review-table th{font-size:.75rem}
.review-table td:first-child{white-space:nowrap}
.review-table td.ok{color:var(--verify)} .review-table td.bad,.review-table tr.bad td{color:var(--err)}
.review .note{padding:.7rem 1.1rem;margin:0;font-size:.85rem}

/* tables */
table{border-collapse:collapse;width:100%;font-size:.92rem;background:#fff;border:1px solid var(--rule);border-radius:8px;overflow:hidden}
th,td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--rule);vertical-align:top}
tr:last-child td{border-bottom:0}
th{font-weight:500;color:var(--slate);font-size:.82rem;background:var(--band)}
td.ok{color:var(--verify);font-weight:600;white-space:nowrap}
td.beta{color:var(--warn);font-weight:600;white-space:nowrap}
.sub{display:block;color:var(--slate);font-size:.8rem;margin-top:.15rem}
.support td:first-child a{font-weight:600}
.support,.price{margin:.75rem 0 .9rem}
.price td:first-child{font-weight:500}

/* plain sections */
.two{display:grid;grid-template-columns:1fr 1fr;gap:3rem}
.plain p{color:var(--ink)}
.plain .small{color:var(--slate)}
details{border-top:1px solid var(--rule);padding:.8rem 0}
details:last-of-type{border-bottom:1px solid var(--rule)}
summary{font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
summary::after{content:"+";color:var(--slate);font-weight:400;font-size:1.2rem}
details[open] summary::after{content:"−"}
details p{margin:.6rem 0 0;color:var(--slate)}

/* live demo */
.live-head{max-width:52rem;margin:0 0 1.25rem}
.live-head p{margin:0 0 .5rem}
.live-stage{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1.35fr);gap:1rem;align-items:stretch}
.pane{background:#fff;border:1px solid var(--rule);border-radius:10px;overflow:hidden;min-height:22rem}
.pane-title{font-size:.8rem;font-weight:600;color:var(--slate);padding:.6rem .9rem;border-bottom:1px solid var(--rule);background:#fff}
.pdfpane pre{margin:0;padding:.9rem .7rem;font-size:.64rem;line-height:1.55;color:#444;overflow:auto;white-space:pre;border:0;border-radius:0;background:#fff}
.ln{display:block;padding:.15rem .4rem;margin:0 -.4rem;border-radius:4px;transition:background .25s}
.ln.hl{background:#FFF3C4} .ln.done{color:#9aa39b}
.arrow{align-self:center;font-size:1.6rem;color:var(--slate)}
#xl{font-size:.76rem;border:0;border-radius:0;table-layout:fixed;width:100%}
#xl th:nth-child(1){width:5.8rem}#xl th:nth-child(3){width:6rem}#xl th:nth-child(4){width:6rem}#xl th:nth-child(5){width:6.4rem}
#xl td.dsc{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#xl td.neg{color:var(--ink)} #xl td.pos{color:var(--verify)}
.live-stage>*{min-width:0}
.xlpane{overflow-x:auto}
#xl th,#xl td{padding:.4rem .5rem}
.chk{font-size:.72rem}
#xl th{background:var(--verify);color:#fff;font-weight:600;border-color:#1a6a50}
#xl td{border-bottom:1px solid var(--rule);padding:.42rem .6rem;animation:rowin .35s ease-out}
#xl td:first-child{white-space:nowrap}
@keyframes rowin{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.chk{color:var(--slate);font-size:.72rem}
.chk.ok{color:var(--verify);font-weight:600}.chk.bad{color:var(--err);font-weight:600}
.xl-foot{display:flex;justify-content:space-between;padding:.55rem .8rem;font-size:.78rem;color:var(--slate);background:var(--band);border-top:1px solid var(--rule);font-family:var(--mono)}
.replay{font-size:.88rem;color:var(--slate)}

/* secondary pages */
.strip{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;padding:1.25rem 0}
.strip-label{color:var(--slate);font-size:.92rem;margin-right:.3rem}
.chip{display:inline-flex;align-items:baseline;gap:.4rem;padding:.4rem .8rem;border:1px solid var(--rule);border-left:3px solid var(--verify);background:#fff;border-radius:6px;text-decoration:none;font-weight:600;font-size:.92rem}
.chip small{font-weight:400;color:var(--slate);font-size:.78rem}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:2.25rem}
.features p{color:var(--slate);font-size:.95rem}
.faq dl{margin:1rem 0 0;display:grid;grid-template-columns:1fr 1fr;gap:1.5rem 3rem}
.faq dt{font-weight:600;margin-bottom:.3rem}
.faq dd{margin:0;color:var(--slate);font-size:.95rem}
.trust{list-style:none;padding:0;margin:1.25rem 0 0;display:flex;flex-wrap:wrap;gap:.4rem 1.5rem;color:var(--slate);font-size:.9rem}
.trust li::before{content:"✓ ";color:var(--verify)}
.hero-band .hero{padding-top:2.5rem}
.packs{max-width:44rem;margin-top:1.5rem}
.packs td,.packs th{padding:.85rem .9rem;vertical-align:middle}
button{font:inherit;font-weight:600;background:var(--ink);color:#fff;border:0;border-radius:6px;padding:.5rem 1.1rem;cursor:pointer}
button:hover{background:#243a5a}
button:focus-visible,.btn-big:focus-visible{outline:2px solid var(--verify);outline-offset:2px}
.inline{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}
.inline input{font-family:var(--mono);padding:.45rem .6rem;border:1px solid var(--rule);border-radius:6px}
.keybox code{font-family:var(--mono);font-size:1.4rem;background:#fff;border:1px solid var(--rule);border-radius:6px;padding:.5rem .8rem;display:inline-block;margin-right:.5rem}
.btn-plan{display:inline-block;background:var(--ink);color:#fff;text-decoration:none;font-weight:600;padding:.55rem 1.3rem;border-radius:8px}
.btn-outline{background:#fff;color:var(--ink);border:1.5px solid var(--ink);padding:.55rem 1.1rem;border-radius:8px;font-weight:600;text-decoration:none;display:inline-block}

/* guides */
.guide-list{list-style:none;padding:0;margin:1.5rem 0}
.guide-list li{padding:1rem 0;border-top:1px solid var(--rule)}
.guide-list a{font-weight:600;font-size:1.05rem}
.guide-list p{color:var(--slate);font-size:.93rem;margin:.3rem 0 0}
.guide h2{font-size:1.2rem;margin-top:2rem}
.guide ol,.guide ul{color:var(--ink);padding-left:1.4rem}
.guide li{margin:.35rem 0}
.guide p{color:var(--ink)}
.guide .lede{color:var(--slate)}
.guide-cta{margin-top:2.5rem;padding:1.25rem 1.4rem;background:var(--verify-soft);border-radius:10px;display:flex;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap}

/* footer */
footer{background:var(--band);border-top:1px solid var(--rule);margin-top:2rem}
.foot-grid{max-width:60rem;margin:0 auto;padding:2.25rem 1.5rem 1rem;display:grid;grid-template-columns:1.6fr 1fr 1.4fr 1fr;gap:2rem;font-size:.9rem;color:var(--slate)}
.foot-grid a{display:block;color:var(--slate);text-decoration:none;margin-bottom:.35rem}
.foot-grid a:hover{color:var(--ink)}
.foot-brand{font-weight:700;color:var(--ink);margin-bottom:.4rem}
.foot-h{font-weight:600;color:var(--ink);margin-bottom:.5rem}
.foot-fine{max-width:60rem;margin:0 auto;padding:0 1.5rem 2rem;font-size:.82rem;color:var(--slate)}

@media (max-width:1100px){.live-stage{grid-template-columns:1fr}.arrow{transform:rotate(90deg);text-align:center}.pane{min-height:0}}
@media (max-width:860px){
  .two,.features,.faq dl,.foot-grid{grid-template-columns:1fr}
  .two{gap:1.5rem}
  .live-stage{grid-template-columns:1fr}
  .arrow{transform:rotate(90deg);text-align:center}
  .pane{min-height:0}
  .top nav{gap:.9rem}
  section{padding:2.25rem 0}
}
@media (max-width:560px){
  html{font-size:16px}
  .top{flex-wrap:wrap;gap:.5rem}
  .top nav a{font-size:.88rem}
  .drop-face{padding:1.8rem 1rem}
  .drop-opts{flex-direction:column;align-items:stretch}
  .keyfield input,.fmtsel select{width:100%}
  .support td:nth-child(2){font-size:.85rem}
}

.tag-ms{display:inline-block;font-size:.7rem;font-weight:600;background:var(--ink);color:#fff;border-radius:4px;padding:.1rem .35rem;margin-left:.4rem;vertical-align:middle}
.hero{padding-top:2.75rem}
.features{padding:2.5rem 0}
.plain h2{margin-bottom:.75rem}
@media (max-width:860px){.live{margin:0 -1.5rem;padding:2.25rem 1.5rem}}