:root{
  --bg:#f5f7fb;--surface:#ffffff;--surface-2:#eef2f8;--ink:#0f1b2d;--ink-2:#44536a;--muted:#6b7a90;
  --line:#dbe2ec;--brand:#0d5c63;--brand-ink:#ffffff;--brand-soft:#dceef0;--accent:#0fa37f;--hit:#fff4d6;
  --shadow:0 1px 2px rgba(15,27,45,.06),0 8px 24px rgba(15,27,45,.06);--r:14px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0c1320;--surface:#131c2c;--surface-2:#1a2538;--ink:#e8eef8;--ink-2:#b4c0d3;--muted:#8a98ae;
  --line:#26334a;--brand:#4fc3cf;--brand-ink:#08111f;--brand-soft:#123a3e;--accent:#34d3a6;--hit:#3a3218;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);}}
:root[data-theme="dark"]{
  --bg:#0c1320;--surface:#131c2c;--surface-2:#1a2538;--ink:#e8eef8;--ink-2:#b4c0d3;--muted:#8a98ae;
  --line:#26334a;--brand:#4fc3cf;--brand-ink:#08111f;--brand-soft:#123a3e;--accent:#34d3a6;--hit:#3a3218;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
img,svg{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
/* header */
.top{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.top .wrap{display:flex;align-items:center;gap:16px;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo i{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--brand);color:var(--brand-ink);font-style:normal;font-size:16px}
.logo b{color:var(--brand)}
#nav{display:flex;gap:4px;margin-left:auto}
#nav a{color:var(--ink-2);padding:8px 12px;border-radius:9px;font-weight:600;font-size:15px}
#nav a:hover{background:var(--surface-2);text-decoration:none;color:var(--ink)}
.icon-btn{background:none;border:1px solid var(--line);color:var(--ink-2);border-radius:9px;width:38px;height:38px;cursor:pointer;font-size:17px}
#menu{display:none}
@media (max-width:760px){
  #menu{display:block;margin-left:auto}
  #nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--surface);flex-direction:column;padding:8px 16px 16px;border-bottom:1px solid var(--line)}
  #nav.open{display:flex}
}
/* hero */
.hero{padding:44px 0 28px;text-align:center}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 10px;letter-spacing:-.03em}
.hero p{color:var(--ink-2);margin:0 auto 22px;max-width:620px;font-size:18px}
.searchbox{position:relative;max-width:620px;margin:0 auto}
.searchbox input{width:100%;padding:16px 18px 16px 48px;border-radius:14px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-size:17px;box-shadow:var(--shadow)}
.searchbox input:focus{outline:2px solid var(--brand);outline-offset:1px}
.searchbox svg{position:absolute;left:16px;top:17px;width:20px;height:20px;color:var(--muted)}
#q-results{position:absolute;left:0;right:0;top:calc(100% + 6px);background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);text-align:left;overflow:hidden;z-index:10}
#q-results a{display:block;padding:11px 16px;color:var(--ink);border-bottom:1px solid var(--line)}
#q-results a:last-child{border:0}
#q-results a:hover{background:var(--surface-2);text-decoration:none}
#q-results p{padding:12px 16px;margin:0}
/* sections */
main{padding-bottom:40px}
.section{margin:34px 0}
.section h2{font-size:22px;margin:0 0 14px;letter-spacing:-.01em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.tile{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;color:var(--ink);transition:transform .12s,border-color .12s}
.tile:hover{text-decoration:none;border-color:var(--brand);transform:translateY(-2px)}
.tile i{flex:none;display:grid;place-items:center;width:40px;height:40px;border-radius:10px;background:var(--brand-soft);font-style:normal;font-size:20px}
.tile b{display:block;font-size:15.5px}
.tile span{display:block;color:var(--muted);font-size:13.5px;line-height:1.4}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-block;padding:7px 12px;background:var(--surface);border:1px solid var(--line);border-radius:999px;color:var(--ink-2);font-size:14px}
.chip:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.muted{color:var(--muted)}
/* page */
.crumbs{font-size:14px;color:var(--muted);padding:18px 0 0}
.crumbs a{color:var(--muted)}
.page-h{padding:10px 0 18px}
.page-h h1{font-size:clamp(26px,4vw,38px);line-height:1.2;margin:6px 0 8px;letter-spacing:-.02em}
.page-h p{color:var(--ink-2);margin:0;font-size:17px;max-width:760px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
@media (max-width:900px){.layout{grid-template-columns:minmax(0,1fr)}}
.tool{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}
.conv{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:end}
.conv.size{grid-template-columns:1fr 1fr}
.conv:has(> .field:nth-child(3):last-child):not(:has(.swap)){grid-template-columns:1fr 1fr 1fr}
@media (max-width:620px){.conv,.conv.size,.conv:has(> .field:nth-child(3):last-child):not(:has(.swap)){grid-template-columns:1fr}.swap{justify-self:center;transform:rotate(90deg)}}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field>span{font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.field input,.field select{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:11px;background:var(--surface-2);color:var(--ink);font-size:17px}
.field input.num{font-size:24px;font-weight:700;padding:12px 14px}
.field input:focus,.field select:focus{outline:2px solid var(--brand);outline-offset:0;background:var(--surface)}
.pair{display:flex;align-items:center;gap:8px}
.pair em{font-style:normal;color:var(--muted);font-weight:600}
.swap{height:48px;width:48px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--brand);font-size:22px;cursor:pointer;margin-bottom:52px}
.conv .field:only-of-type~.swap{margin-bottom:0}
.swap[aria-hidden]{cursor:default;margin-bottom:0}
.conv-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:14px;flex-wrap:wrap}
.formula{margin:0;font-size:17px}
.note{margin:0;color:var(--muted);font-size:14px}
.btn-ghost{background:var(--brand-soft);color:var(--brand);border:0;border-radius:10px;padding:10px 14px;font-weight:700;cursor:pointer;font-size:14px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;margin-top:16px}
.card{background:var(--surface-2);border-radius:12px;padding:12px 14px}
.card span{display:block;font-size:12.5px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.03em}
.card b{display:block;font-size:22px;margin-top:2px}
.card.is-src{background:var(--brand);color:var(--brand-ink)}.card.is-src span{color:inherit;opacity:.8}
.answer{background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:10px;padding:14px 16px;margin:18px 0;font-size:18px}
.answer strong{font-size:20px}
.prose{margin-top:26px}
.prose h2{font-size:22px;margin:30px 0 10px;letter-spacing:-.01em}
.prose h3{font-size:18px;margin:22px 0 6px}
.prose p,.prose li{color:var(--ink-2)}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{background:var(--surface-2);font-size:13px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:var(--surface-2)}
tr.hit td{background:var(--hit);font-weight:700}
details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:8px 0}
summary{cursor:pointer;font-weight:700}
details p{margin:8px 0 2px}
aside .panel{margin-bottom:16px}
aside h3{margin:0 0 10px;font-size:15px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
aside ul{list-style:none;margin:0;padding:0}
aside li a{display:block;padding:6px 0;border-bottom:1px solid var(--line);color:var(--ink)}
aside li:last-child a{border:0}
.ad{min-height:90px;margin:22px 0;display:flex;align-items:center;justify-content:center}
.diagram{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;margin:14px 0;text-align:center}
.diagram figcaption{color:var(--muted);font-size:14px;margin-top:6px}
/* my sizes */
.mysize{border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:10px;background:var(--surface)}
.mysize-h{display:flex;justify-content:space-between;align-items:center;font-weight:700}
.mysize-h button{background:none;border:0;color:var(--muted);font-size:20px;cursor:pointer}
.mysize-row{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:6px}
.mysize-row span{font-size:17px;font-weight:700}
.mysize-row em{display:block;font-style:normal;font-size:11.5px;color:var(--muted);text-transform:uppercase;font-weight:700}
/* footer */
footer{background:var(--surface);border-top:1px solid var(--line);padding:28px 0;margin-top:30px;font-size:14px;color:var(--muted)}
footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:18px}
footer h4{margin:0 0 8px;color:var(--ink);font-size:14px}
footer a{display:block;color:var(--muted);padding:2px 0}
footer .legal{margin-top:20px;border-top:1px solid var(--line);padding-top:14px}
#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;opacity:0;transition:.2s;pointer-events:none;z-index:50}
#toast.show{opacity:1;transform:translateX(-50%)}

.tool,.prose,.layout>div{min-width:0}
#theme svg{width:18px;height:18px;vertical-align:middle}
/* --- hand luggage checker --- */
.bagform .fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}
.bagform .filters{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
@media (max-width:620px){.bagform .filters{grid-template-columns:1fr}}
.actions{display:flex;align-items:center;gap:14px;margin-top:14px;flex-wrap:wrap}
.btn{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:11px 16px;font-weight:700;cursor:pointer;font-size:15px}
.hint{color:var(--muted);font-size:14px}
.tally{margin:18px 0 10px;color:var(--ink-2)}
.tally b{color:var(--ink)}
.results{display:grid;gap:8px;margin-top:8px}
.res{display:grid;grid-template-columns:minmax(120px,1.1fr) minmax(120px,1fr) 2fr;gap:10px;align-items:center;
  padding:12px 14px;border:1px solid var(--line);border-left-width:5px;border-radius:12px;background:var(--surface);color:var(--ink)}
.res:hover{text-decoration:none;border-color:var(--brand);border-left-color:inherit}
.res b{font-size:16px}
.res .verdict{font-weight:700;font-size:14.5px}
.res .detail{color:var(--muted);font-size:13.5px}
@media (max-width:700px){.res{grid-template-columns:1fr;gap:3px}}
.res.ok{border-left-color:#17935f}.res.ok .verdict{color:#17935f}
.res.warn{border-left-color:#c07c10}.res.warn .verdict{color:#c07c10}
.res.no{border-left-color:#c33c3c}.res.no .verdict{color:#c33c3c}
.res.unknown{border-left-color:var(--muted)}.res.unknown .verdict{color:var(--muted)}
.verdict-card{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border-radius:14px;margin:16px 0;
  border:1px solid var(--line);border-left:6px solid var(--brand);background:var(--surface)}
.verdict-card .big{font-size:26px;font-weight:800;line-height:1.2}
.verdict-card.yes{border-left-color:#17935f}
.verdict-card.no{border-left-color:#c33c3c}
.allow{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0}
@media (max-width:620px){.allow{grid-template-columns:1fr}}
.allow .box{background:var(--surface-2);border-radius:12px;padding:14px 16px}
.allow .box h3{margin:0 0 6px;font-size:14px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.allow .box .size{font-size:22px;font-weight:800}
.allow .box .meta{color:var(--muted);font-size:14px;margin-top:4px}
.badge{display:inline-block;padding:3px 9px;border-radius:999px;font-size:12.5px;font-weight:700}
.badge.free{background:#e3f4ec;color:#0f6b46}
.badge.paid{background:#fdf1dc;color:#8a5a08}
:root[data-theme="dark"] .badge.free{background:#12331f;color:#5ad39a}
:root[data-theme="dark"] .badge.paid{background:#3a2c12;color:#e0ae55}
.checked{color:var(--muted);font-size:13.5px;margin-top:10px}
.filterbar{margin:14px 0}
.filterbar input{width:100%;max-width:420px;padding:12px 14px;border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--ink);font-size:16px}