:root{
  --water:#E3EDEF; --land:#EADFC3; --coast:#B7A47A; --grat:#C9DADE;
  --ink:#1A3247; --muted:#58707F; --line:#C8D6DB; --surface:#F6F9F9; --field:#FFFFFF;
  --route:#B0177A; --route-soft:#B0177A22; --focus:#1F6FB2; --on-route:#FFFFFF;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){ :root:not([data-theme="light"]){
  --water:#0F1F2B; --land:#243646; --coast:#3C5367; --grat:#1A2E3D;
  --ink:#E1EBF0; --muted:#8EA4B3; --line:#2A4152; --surface:#132533; --field:#0F1F2B;
  --route:#F26CB9; --route-soft:#F26CB933; --focus:#6FB4F0; --on-route:#10202D;
}}
:root[data-theme="dark"]{
  --water:#0F1F2B; --land:#243646; --coast:#3C5367; --grat:#1A2E3D;
  --ink:#E1EBF0; --muted:#8EA4B3; --line:#2A4152; --surface:#132533; --field:#0F1F2B;
  --route:#F26CB9; --route-soft:#F26CB933; --focus:#6FB4F0; --on-route:#10202D;
}
*,*::before,*::after{box-sizing:inherit}
html{height:100%;scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;min-height:100%;background:var(--surface);color:var(--ink);
  font:400 15px/1.5 "Barlow",system-ui,-apple-system,"Segoe UI",sans-serif}
.num{font-family:"Barlow Semi Condensed","Arial Narrow",system-ui,sans-serif;font-variant-numeric:tabular-nums}
.app{display:grid;grid-template-columns:minmax(300px,360px) 1fr;min-height:100vh}
aside{padding:28px 26px 32px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:22px}
h1{font:700 30px/1.05 "Barlow Semi Condensed","Arial Narrow",sans-serif;margin:0;letter-spacing:-.01em}
.lede{margin:6px 0 0;color:var(--muted);font-size:14px}
fieldset{border:0;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
legend{font-weight:600;font-size:14px;padding:0;margin-bottom:10px}
label.f{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--muted)}
input[type=text],input[type=number],input[type=datetime-local],input[type=date]{
  font:500 16px/1.2 "Barlow",system-ui,sans-serif;color:var(--ink);background:var(--field);
  border:1px solid var(--line);border-radius:6px;padding:10px 11px;width:100%;min-width:0}
input:focus-visible,button:focus-visible{outline:2px solid var(--focus);outline-offset:1px}
.ports{position:relative;display:flex;flex-direction:column;gap:10px}
.ac{position:relative}
.ac .code{position:absolute;right:10px;top:31px;font-size:12px;color:var(--muted);pointer-events:none}
.ac input{padding-right:62px}
.list{position:absolute;z-index:20;left:0;right:0;top:100%;margin:4px 0 0;padding:4px;list-style:none;
  background:var(--field);border:1px solid var(--line);border-radius:6px;max-height:300px;overflow:auto;
  box-shadow:0 8px 24px rgba(10,30,45,.18)}
.list li{padding:7px 9px;border-radius:4px;cursor:pointer;display:flex;justify-content:space-between;gap:10px}
.list li small{color:var(--muted);white-space:nowrap}
.list li[aria-selected=true]{background:var(--route-soft)}
.list .empty{color:var(--muted);cursor:default}
.swap{position:absolute;right:-12px;top:52px;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);cursor:pointer;font-size:14px;line-height:1;display:grid;place-items:center;z-index:5}
.speedrow{display:grid;grid-template-columns:1fr 92px;gap:12px;align-items:end}
.unit{position:relative;display:block}.unit input{padding-right:34px}
.unit span{position:absolute;right:10px;bottom:11px;font-size:13px;color:var(--muted);pointer-events:none}
input[type=range]{width:100%;accent-color:var(--route);margin:0 0 12px}
.two{display:grid;grid-template-columns:92px minmax(0,1fr);gap:12px;align-items:end}
.check{display:flex;gap:9px;align-items:flex-start;font-size:14px;cursor:pointer}
.check input{margin:3px 0 0;accent-color:var(--route);width:16px;height:16px}
.check small{display:block;color:var(--muted);font-size:12.5px}
main{display:flex;flex-direction:column;min-width:0}
.chart{position:relative;flex:1 1 auto;min-height:340px;background:var(--water);overflow:hidden}
.chart>svg{position:absolute;inset:0;width:100%;height:100%;display:block}
.land{fill:var(--land);stroke:var(--coast);vector-effect:non-scaling-stroke;stroke-width:.6}
.grat{stroke:var(--grat);fill:none;vector-effect:non-scaling-stroke;stroke-width:1}
.rt{fill:none;stroke:var(--route);vector-effect:non-scaling-stroke;stroke-width:2.6;stroke-linejoin:round;stroke-linecap:round}
.rt-halo{fill:none;stroke:var(--water);vector-effect:non-scaling-stroke;stroke-width:7;stroke-linejoin:round;opacity:.8}
.pt{fill:var(--water);stroke:var(--route);vector-effect:non-scaling-stroke;stroke-width:2.4}
.lbl{fill:var(--ink);font-family:"Barlow",sans-serif;font-weight:600;paint-order:stroke;stroke:var(--water);stroke-width:3px;stroke-linejoin:round}
.readout{display:grid;grid-template-columns:auto auto 1fr;gap:0;border-top:1px solid var(--line)}
.cell{padding:18px 26px;border-right:1px solid var(--line)}
.cell:last-child{border-right:0}
.k{font-size:13px;color:var(--muted)}
.big{font-size:44px;font-weight:600;line-height:1;margin-top:6px;letter-spacing:-.01em;white-space:nowrap}
.big .u{font-size:20px;font-weight:500;color:var(--muted);margin-left:4px}
.sub{font-size:14px;color:var(--muted);margin-top:6px}
.via{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.via span{font-size:13px;border:1px solid var(--route);color:var(--route);border-radius:999px;padding:2px 10px}
.speeds{border-top:1px solid var(--line);padding:16px 26px 22px}
.tbl-wrap{overflow-x:auto}
table{border-collapse:collapse;margin-top:8px;font-size:15px}
th,td{padding:5px 14px 5px 0;text-align:left;white-space:nowrap}
th{font-weight:500;color:var(--muted);font-size:13px}
td.cur,th.cur{color:var(--route);font-weight:700}
.msg{padding:18px 26px;border-top:1px solid var(--line);color:var(--ink)}
.warn{font-size:13px;color:var(--muted);margin-top:8px}
footer{font-size:12px;color:var(--muted);margin-top:auto;line-height:1.45}
.spon{border-top:1px solid var(--line);padding:16px 26px;display:grid;grid-template-columns:auto 1fr auto;gap:6px 18px;align-items:center}
.spon .tag{grid-column:1/-1;font-size:12px;color:var(--muted)}
.spon img{width:64px;height:64px;object-fit:contain;border-radius:6px;background:#fff;border:1px solid var(--line)}
.spon .nm{font-weight:600}
.spon .tl{font-size:14px;color:var(--muted)}
.spon a.btn{display:inline-block;text-decoration:none;font-weight:600;font-size:14px;color:var(--on-route);background:var(--route);padding:9px 16px;border-radius:6px;white-space:nowrap}
.spon a.btn:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.spon.house{grid-template-columns:1fr auto}
.adslot{border-top:1px solid var(--line);padding:14px 26px 22px}
.adslot .tag{font-size:12px;color:var(--muted);margin-bottom:6px}
footer a{color:inherit}
.brand{display:flex;align-items:center;gap:10px}
.brand .mark{width:38px;height:38px;flex:none}
[hidden]{display:none!important}
@media (max-width:860px){
  .app{grid-template-columns:1fr}
  aside{border-right:0;border-bottom:1px solid var(--line);padding:22px 18px}
  .chart{min-height:0;height:62vw;max-height:420px;flex:none}
  .readout{grid-template-columns:1fr 1fr}
  .cell{padding:16px 18px}
  .cell.wide{grid-column:1/-1;border-top:1px solid var(--line);border-right:0}
  .cell:nth-child(2){border-right:0}
  .big{font-size:36px}
  .speeds,.msg,.adslot{padding:14px 18px 20px}
  .spon{padding:14px 18px;grid-template-columns:auto 1fr}
  .spon a.btn{grid-column:1/-1;text-align:center}
  .spon.house{grid-template-columns:1fr}
  footer{order:9}
}
@media (prefers-reduced-motion:no-preference){ .rt{transition:opacity .2s} }

/* ---- shared additions ---- */
.tabs{display:flex;gap:4px;margin-top:14px;border-bottom:1px solid var(--line)}
.tabs a{padding:7px 2px 8px;margin-right:14px;font-size:14px;white-space:nowrap;font-weight:600;color:var(--muted);text-decoration:none;border-bottom:2.5px solid transparent;margin-bottom:-1px}
.tabs a[aria-current=page]{color:var(--ink);border-bottom-color:var(--route)}
.tabs a:hover{color:var(--ink)}
.tabs a:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.pt-num{fill:var(--route);stroke:var(--water);vector-effect:non-scaling-stroke;stroke-width:2}
.pt-txt{fill:var(--on-route);font-family:"Barlow Semi Condensed","Arial Narrow",sans-serif;font-weight:700}
.rt.hl{stroke-width:5}
/* ---- language switch ---- */
aside,.ihead{position:relative}
.topbar{position:absolute;top:12px;right:16px;display:flex;align-items:center;gap:12px;z-index:6}
.langs{display:flex;gap:7px}
.flag{width:26px;height:17px;padding:0;border:1px solid var(--line);border-radius:3px;overflow:hidden;cursor:pointer;background:none;opacity:.5;display:block;transition:opacity .15s}
.flag svg{width:100%;height:100%;display:block}
.flag:hover{opacity:.9}
.flag[aria-pressed=true]{opacity:1;box-shadow:0 0 0 2px var(--surface),0 0 0 3.5px var(--route)}
.flag:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
@media (max-width:860px){.topbar{top:10px;right:14px}}

/* ---- sponsor logo strip ---- */
.spon.strip{display:block;container-type:inline-size}
.spon.strip .tag{margin-bottom:10px}
.logos{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}
@container (max-width:780px){.logos{grid-template-columns:repeat(3,minmax(0,1fr))}}
@container (max-width:400px){.logos{grid-template-columns:repeat(2,minmax(0,1fr))}}
.logo-tile{display:flex;flex-direction:column;align-items:stretch;gap:8px;padding:10px 10px 11px;background:#fff;border:1px solid var(--line);border-radius:8px;text-decoration:none;transition:transform .15s,box-shadow .15s;min-width:0}
.logo-box{height:48px;display:flex;align-items:center;justify-content:center}
.spon .logo-box img{width:auto;height:auto;max-width:100%;max-height:48px;object-fit:contain;display:block;border:0;border-radius:0;background:none}
.logo-name{font-weight:600;font-size:14px;color:#1A3247;text-align:center;line-height:1.2}
.logo-desc{margin:0;font-size:12.5px;line-height:1.35;color:#4A6273;text-align:center;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.7em}
.logo-tile:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(10,30,45,.14)}
.logo-tile:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.logo-tile.free{background:transparent;border-style:dashed}
.logo-tile.free .logo-box span{font-weight:600;font-size:13.5px;color:var(--ink);text-align:center}
.logo-tile.free .logo-desc{color:var(--muted)}
.logo-tile.free:hover{border-color:var(--route)}

/* ---- interactive map ---- */
.chart{position:relative}
.chart>svg{touch-action:none;cursor:grab;user-select:none;-webkit-user-select:none}
.chart>svg.dragging{cursor:grabbing}
.chart>svg.hi .g-land{display:none}
.land-hi{fill:var(--land);stroke:var(--land);stroke-width:.8;vector-effect:non-scaling-stroke}
.mapctl{position:absolute;right:12px;bottom:12px;display:flex;flex-direction:column;border-radius:8px;overflow:hidden;box-shadow:0 2px 10px rgba(10,30,45,.2);z-index:4}
.mapctl button{width:36px;height:36px;border:0;border-bottom:1px solid var(--line);background:var(--field);color:var(--ink);font:600 20px/1 "Barlow",system-ui,sans-serif;cursor:pointer;display:grid;place-items:center;padding:0}
.mapctl button:last-child{border-bottom:0}
.mapctl button svg{width:16px;height:16px;display:block}
.mapctl button:hover{background:var(--route-soft)}
.mapctl button:focus-visible{outline:2px solid var(--focus);outline-offset:-2px}

/* ---- contact ---- */
aside,.ihead{padding-top:46px!important}
.contact-btn{display:inline-flex;align-items:center;gap:6px;font:600 13px/1 "Barlow",system-ui,sans-serif;color:var(--ink);background:var(--field);border:1px solid var(--line);border-radius:999px;padding:5px 11px 5px 9px;cursor:pointer}
.contact-btn svg{width:15px;height:15px}
.contact-btn:hover{border-color:var(--route);color:var(--route)}
.contact-btn:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
dialog.contact{width:min(560px,calc(100vw - 24px));max-height:calc(100vh - 24px);border:0;border-radius:12px;padding:0;background:var(--surface);color:var(--ink);box-shadow:0 20px 60px rgba(5,20,30,.35)}
dialog.contact::backdrop{background:rgba(8,22,33,.55)}
dialog.contact form{display:flex;flex-direction:column;max-height:calc(100vh - 24px)}
dialog.contact h2{font:700 24px/1.15 "Barlow Semi Condensed","Arial Narrow",sans-serif;margin:22px 22px 4px}
.cintro{margin:0 22px 14px;color:var(--muted);font-size:14px}
.cbody{padding:0 22px;display:flex;flex-direction:column;gap:12px;overflow:auto}
.two2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
dialog.contact select,dialog.contact input[type=email],dialog.contact textarea{font:500 15px/1.35 "Barlow",system-ui,sans-serif;color:var(--ink);background:var(--field);border:1px solid var(--line);border-radius:6px;padding:9px 10px;width:100%}
dialog.contact textarea{resize:vertical;min-height:110px}
dialog.contact select:focus-visible,dialog.contact input:focus-visible,dialog.contact textarea:focus-visible{outline:2px solid var(--focus);outline-offset:1px}
.cstatus{margin:0;font-size:14px;min-height:1.2em}
.cstatus.ok{color:#1E7B4A}.cstatus.err{color:var(--bad,#C0262D)}
.cstatus a{color:inherit}
.cactions{display:flex;justify-content:flex-end;gap:10px;padding:16px 22px 20px;border-top:1px solid var(--line);margin-top:14px}
.b{font:600 14px/1 "Barlow",system-ui,sans-serif;border-radius:6px;padding:10px 16px;cursor:pointer;border:1px solid var(--line);background:var(--field);color:var(--ink)}
.b.pri{background:var(--route);border-color:var(--route);color:var(--on-route)}
.b:disabled{opacity:.5;cursor:default}
@media (max-width:520px){.two2{grid-template-columns:1fr}}