:root{--bg:#f6f8fb;--card:#fff;--ink:#14213d;--muted:#5b6475;--line:#dde3ec;--brand:#0b6e99;--brand-d:#085273;--accent:#f59e0b;--ok:#0f8a5f;--seller:#0b6e99;--buyer:#c2410c;--radius:12px;--shadow:0 1px 2px rgba(20,33,61,.06),0 4px 16px rgba(20,33,61,.06)}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}a:hover{color:var(--brand-d)}
img,svg{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}
/* header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.site-header .wrap{display:flex;align-items:center;gap:20px;min-height:62px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none;white-space:nowrap}
.logo svg{width:32px;height:32px}
.logo span b{color:var(--brand)}
.main-nav{margin-left:auto;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{padding:8px 12px;border-radius:8px;color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem;white-space:nowrap}
.main-nav a:hover,.main-nav a[aria-current=page]{background:#eaf4f9;color:var(--brand-d)}
/* breadcrumbs */
.crumbs{font-size:.85rem;color:var(--muted);margin:18px 0 0}.crumbs a{color:var(--muted)}
/* hero */
.hero{background:linear-gradient(135deg,#0b3954 0%,#0b6e99 100%);color:#fff;padding:56px 0 64px}
.hero h1{font-size:clamp(1.8rem,4vw,2.7rem);line-height:1.15;margin:0 0 14px;max-width:760px}
.hero p{font-size:1.1rem;opacity:.92;max-width:680px;margin:0}
.hero .pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.hero .pills span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:4px 12px;border-radius:999px;font-size:.88rem}
/* tool grid */
.section{padding:40px 0}
.section h2{font-size:1.5rem;margin:0 0 6px}
.section .sub{color:var(--muted);margin:0 0 22px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.tool-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.tool-card:hover{transform:translateY(-2px);border-color:var(--brand);color:var(--ink)}
.tool-card .ic{width:42px;height:42px;border-radius:10px;background:#eaf4f9;color:var(--brand);display:grid;place-items:center;font-size:1.3rem;margin-bottom:12px}
.tool-card h3{margin:0 0 6px;font-size:1.08rem}
.tool-card p{margin:0;color:var(--muted);font-size:.93rem}
.tool-card .go{margin-top:auto;padding-top:12px;font-weight:700;color:var(--brand);font-size:.9rem}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.features div{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.features h3{margin:0 0 4px;font-size:1rem}.features p{margin:0;color:var(--muted);font-size:.93rem}
/* tool page */
.page-head{padding:10px 0 6px}
.page-head h1{font-size:clamp(1.6rem,3.4vw,2.2rem);line-height:1.2;margin:8px 0 8px}
.page-head .lead{color:var(--muted);font-size:1.07rem;margin:0;max-width:780px}
.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;align-items:start;margin:22px 0 40px}
@media(max-width:900px){.tool-layout{grid-template-columns:1fr}.sidebar{order:3}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.calc h2{font-size:1.1rem;margin:0 0 14px}
.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-bottom:12px}
label{display:block;font-size:.85rem;font-weight:600;color:var(--muted);margin-bottom:4px}
input[type=number],input[type=text],select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus{outline:2px solid #9fd3ea;border-color:var(--brand)}
.check{display:flex;align-items:center;gap:8px;font-weight:500;color:var(--ink);font-size:.93rem;margin:6px 0}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden;margin-bottom:16px}
.seg button{border:0;background:#fff;padding:8px 14px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer}
.seg button[aria-pressed=true]{background:var(--brand);color:#fff}
.btn{display:inline-block;border:1px solid var(--brand);background:#fff;color:var(--brand);padding:8px 14px;border-radius:8px;font:inherit;font-weight:600;cursor:pointer}
.btn:hover{background:#eaf4f9}
.btn.del{border-color:var(--line);color:var(--muted);padding:6px 10px}
.pieces .piece{display:grid;grid-template-columns:repeat(5,minmax(0,1fr)) auto;gap:8px;align-items:end;margin-bottom:8px}
.pieces .piece.four{grid-template-columns:repeat(4,minmax(0,1fr)) auto}
@media(max-width:560px){.pieces .piece,.pieces .piece.four{grid-template-columns:repeat(2,minmax(0,1fr))}.pieces .piece .btn.del{grid-column:span 2}}
.results{margin-top:18px;border-top:1px solid var(--line);padding-top:16px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.kpi{background:#f3f8fb;border:1px solid #d7e9f2;border-radius:10px;padding:12px 14px}
.kpi .k{font-size:.8rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.03em}
.kpi .v{font-size:1.35rem;font-weight:800;color:var(--ink);line-height:1.3}
.kpi.hl{background:#0b6e99;border-color:#0b6e99}.kpi.hl .k,.kpi.hl .v{color:#fff}
.note{font-size:.85rem;color:var(--muted);margin:12px 0 0}
.warn{background:#fff7e6;border:1px solid #fde1a6;border-radius:8px;padding:10px 12px;font-size:.88rem;margin-top:12px}
table{border-collapse:collapse;width:100%;font-size:.92rem}
th,td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:#f3f6fa;font-weight:700}
.table-wrap{overflow-x:auto}
tr.active td{background:#eaf4f9;font-weight:700}
/* content */
.content{margin-top:24px}
.content h2{font-size:1.35rem;margin:28px 0 8px}
.content h3{font-size:1.08rem;margin:20px 0 6px}
.content p,.content li{color:#2b3550}
.content code,.formula{background:#f3f6fa;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9em}
.formula{display:block;padding:10px 12px;margin:10px 0;overflow-x:auto;white-space:pre-wrap}
.faq details{border:1px solid var(--line);border-radius:10px;background:#fff;padding:12px 16px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700}
.faq details p{margin:8px 0 0}
/* sidebar */
.sidebar .card{padding:18px}
.sidebar h2{font-size:1rem;margin:0 0 10px}
.sidebar ul{list-style:none;margin:0;padding:0}
.sidebar li a{display:block;padding:7px 0;border-bottom:1px solid var(--line);text-decoration:none;font-weight:600;font-size:.93rem}
.sidebar li:last-child a{border-bottom:0}
.stack>*+*{margin-top:16px}
/* download placeholder */
.download{display:flex;gap:14px;align-items:center;background:#f0fdf6;border:1px dashed #86d1ae;border-radius:10px;padding:14px 16px;margin-top:18px}
.download .t{font-weight:700}.download p{margin:2px 0 0;font-size:.88rem;color:var(--muted)}
.download button{margin-left:auto;white-space:nowrap;border:0;background:#cbd5e1;color:#475569;border-radius:8px;padding:9px 14px;font:inherit;font-weight:700;cursor:not-allowed}
/* ad placeholders (no ad code; replace once AdSense is approved) */
.ad-slot{display:flex;align-items:center;justify-content:center;min-height:100px;border:1px dashed #c3ccd9;border-radius:10px;background:repeating-linear-gradient(45deg,#fafbfd,#fafbfd 10px,#f3f5f9 10px,#f3f5f9 20px);color:#98a2b3;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;margin:18px 0}
.ad-slot.side{min-height:250px}
/* incoterms */
.inco-pick{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.inco-pick button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 12px;font:inherit;font-weight:800;cursor:pointer;color:var(--ink)}
.inco-pick button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.legend{display:flex;gap:16px;font-size:.85rem;margin:8px 0 12px;flex-wrap:wrap}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.steps{list-style:none;padding:0;margin:0}
.steps li{display:grid;grid-template-columns:28px 1fr auto;gap:10px;align-items:center;padding:9px 12px;border-radius:8px;margin-bottom:6px;border-left:5px solid}
.steps li.S{background:#eaf4f9;border-color:var(--seller)}
.steps li.B{background:#fff1e8;border-color:var(--buyer)}
.steps li .n{font-weight:800;color:var(--muted)}
.steps li .who{font-weight:800;font-size:.85rem}
.steps li.S .who{color:var(--seller)}.steps li.B .who{color:var(--buyer)}
.risk{background:#14213d;color:#fff;border-radius:10px;padding:12px 14px;margin:12px 0}
/* footer */
.site-footer{background:#0f1a30;color:#c9d2e3;padding:36px 0 26px;margin-top:40px;font-size:.92rem}
.site-footer a{color:#e6ecf6;text-decoration:none}.site-footer a:hover{text-decoration:underline}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
@media(max-width:700px){.foot-grid{grid-template-columns:1fr}}
.site-footer h2{font-size:.95rem;color:#fff;margin:0 0 8px}
.site-footer ul{list-style:none;margin:0;padding:0}.site-footer li{margin:4px 0}
.site-footer .fine{border-top:1px solid #24304a;margin-top:24px;padding-top:16px;font-size:.82rem;color:#8e9ab3}
.prose{max-width:780px}
.prose h2{margin-top:28px}
@media(max-width:560px){.card{padding:16px}.hero{padding:40px 0 44px}}
[hidden]{display:none!important}
.logo svg{flex:none}
@media(max-width:700px){.site-header .wrap{flex-wrap:wrap;gap:0;padding-top:8px}.main-nav{margin-left:-12px;width:calc(100% + 12px);padding-bottom:6px}.logo{min-height:40px}}
.row label{display:flex;flex-direction:column;justify-content:flex-end}