:root{
  --bg:#eef3f6; --paper:#ffffff; --ink:#0f2433; --muted:#566b7a; --line:#cfdbe3;
  --sea:#1d5f8a; --sea-soft:#dcebf5; --port:#c1272d; --port-soft:#fbe5e6; --stbd:#0e7a43; --stbd-soft:#dcf1e5; --buoy:#e3a400;
  --display:"Barlow Condensed","Arial Narrow","Roboto Condensed","Helvetica Neue",Arial,sans-serif; --body:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif; --mono:ui-monospace,"SF Mono",Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root{
  --bg:#0b1a24; --paper:#11232f; --ink:#e3edf3; --muted:#93a8b6; --line:#24394a;
  --sea:#6fb3e0; --sea-soft:#163447; --port:#ff6b6f; --port-soft:#3a1a1e; --stbd:#4fd08c; --stbd-soft:#14342a; --buoy:#f2bf3a; color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.5}
a{color:var(--sea)}
h1,h2,h3{font-family:var(--display);font-weight:700;margin:0;text-wrap:balance}
h1{font-size:2rem;line-height:1.05} h2{font-size:1.35rem;text-transform:uppercase;letter-spacing:.04em} h3{font-size:1.1rem;text-transform:uppercase;letter-spacing:.05em}
.topin{max-width:1000px;margin:0 auto;padding-inline:max(16px,env(safe-area-inset-left,0px))}
.topbar{background:var(--paper);border-bottom:2px solid var(--ink)}
.topbar .topin{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-block:10px}
.brand{font-family:var(--display);font-size:1.6rem;font-weight:700;color:var(--ink);text-decoration:none;letter-spacing:.01em;display:inline-flex;align-items:center;gap:6px}
.mark{width:1.1em;height:1.1em;flex:none}
nav{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
nav a{text-decoration:none;font-weight:500}
nav a.on{text-decoration:underline}
.subnav{background:var(--sea-soft);border-bottom:1px solid var(--line)}
.subnav .topin{display:flex;gap:16px;flex-wrap:wrap;padding-block:8px}
.subnav a{text-decoration:none;font-weight:600;font-size:.92rem}
.wrap{max-width:1000px;margin:0 auto;padding:24px max(16px,env(safe-area-inset-right,0px)) 48px max(16px,env(safe-area-inset-left,0px));display:flex;flex-direction:column;gap:18px}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:20px;display:flex;flex-direction:column;gap:14px;min-width:0}
.narrow{max-width:460px;width:100%;margin:0 auto}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.form{display:flex;flex-direction:column;gap:12px}
.form label{display:flex;flex-direction:column;gap:4px;font-weight:500;font-size:.92rem}
.form .check{flex-direction:row;align-items:flex-start;gap:8px;font-weight:400}
input,select,textarea{font:inherit;color:var(--ink);background:var(--paper);border:1.5px solid var(--line);border-radius:6px;padding:9px 10px;width:100%}
.check input{width:18px;height:18px;flex:none;margin-top:2px;accent-color:var(--sea)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--sea);border-color:var(--sea)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.btn{display:inline-block;border:0;border-radius:6px;padding:10px 18px;font-family:var(--display);font-size:1.1rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;cursor:pointer;background:var(--sea);color:var(--paper);text-decoration:none;text-align:center}
.btn.ghost{background:transparent;color:var(--sea);border:1.5px solid var(--sea)}
.btn.danger{background:var(--port)}
.btn.small{padding:6px 12px;font-size:.95rem}
.btn:disabled{opacity:.45;cursor:not-allowed}
.linkbtn{background:none;border:0;color:var(--sea);font:inherit;font-weight:500;cursor:pointer;padding:0}
form.inline{display:inline}
.hint{color:var(--muted);font-size:.88rem;margin:0}
.flash{padding:10px 14px;border-radius:6px;border-left:4px solid var(--sea);background:var(--sea-soft)}
.flash.ok{border-color:var(--stbd);background:var(--stbd-soft)}
.flash.err{border-color:var(--port);background:var(--port-soft)}
.tbl{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--display);text-transform:uppercase;letter-spacing:.05em;font-size:.85rem;color:var(--muted);font-weight:600}
td.r,th.r{text-align:right}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.pill{display:inline-block;padding:1px 9px;border-radius:999px;font-size:.78rem;font-weight:600;white-space:nowrap}
.pill.ok{background:var(--stbd-soft);color:var(--stbd)} .pill.ko{background:var(--port-soft);color:var(--port)} .pill.nt{background:var(--sea-soft);color:var(--sea)}
.stat{border-top:3px solid var(--sea);padding-top:6px}
.stat .v{font-family:var(--display);font-size:2rem;font-weight:700;line-height:1.1}
.label{font-family:var(--display);font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
.plan{border:1.5px solid var(--line);border-radius:6px;padding:18px;display:flex;flex-direction:column;gap:10px}
.plan .price{font-family:var(--display);font-size:2.2rem;font-weight:700;line-height:1}
.plan .per{color:var(--muted);font-size:.9rem}
.bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:space-between}
.foot{border-top:1px solid var(--line);padding-block:16px;color:var(--muted);font-size:.85rem}
.legal{max-width:70ch}
.legal h2{margin-top:10px}
@media (max-width:520px){.row2{grid-template-columns:1fr} h1{font-size:1.7rem}}
.feats{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:3px;font-size:.92rem}
.feats .in{color:var(--stbd);font-weight:600} .feats .out{color:var(--muted)}
fieldset{margin:0;min-width:0}
.toc{margin:0;padding-left:1.4em;display:flex;flex-direction:column;gap:6px}
.toc li.read a{color:var(--muted)}
.toc .pill{margin-left:6px}
.locked-item{color:var(--muted)}
.lesson{max-width:76ch}
.lesson h2{margin-top:14px} .lesson h3{margin-top:10px}
.lesson p,.lesson li{line-height:1.6}
.lesson ul,.lesson ol{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:4px}
.lesson figure{margin:6px 0} .lesson img{max-width:100%;height:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
.lesson figcaption{color:var(--muted);font-size:.85rem;margin-top:4px}
.keypoint{border-left:4px solid var(--buoy);background:var(--sea-soft);padding:10px 14px;border-radius:0 6px 6px 0}
.keypoint p{margin:0}
code{font-family:var(--mono);font-size:.9em;background:var(--sea-soft);padding:1px 4px;border-radius:3px}
textarea{resize:vertical}
.lesson p{margin:0}
.lesson{gap:12px}
.promo{padding-block:12px}
.promo input{padding:6px 10px}
s.per{font-size:1.1rem}