:root{--navy:#071a36;--blue:#0755b5;--aqua:#26c9bf;--ink:#182743;--muted:#5b6b80;--paper:#f3f7fd;--card:#fff;--line:#dce6f4;--error:#a62437}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);font:16px/1.58 system-ui,-apple-system,"Segoe UI",Arial,sans-serif;color:var(--ink)}
a{color:var(--blue)}a:hover{text-decoration-thickness:2px}button,input{font:inherit}button{cursor:pointer}
:focus-visible{outline:3px solid #ffbf47;outline-offset:3px}
.wrapper{width:min(100% - 32px,1160px);margin-inline:auto}
.site-top{background:#050b2c;padding:14px 0}.site-top a{display:inline-flex;align-items:center}.site-top img{width:165px;height:auto}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:9px;align-items:center;padding:20px 0;font-size:.85rem;color:var(--muted)}
.breadcrumbs a{color:#46617f;text-decoration:none}
.hero{position:relative;overflow:hidden;border-radius:22px;background:radial-gradient(circle at 92% 10%,#1d5e85 0,transparent 35%),linear-gradient(115deg,#091b3a,#0a3869);color:white;padding:clamp(24px,5vw,54px);display:grid;grid-template-columns:minmax(0,1.7fr) minmax(190px,.7fr);gap:24px;align-items:center;box-shadow:0 18px 38px #10295115}
.eyebrow{margin:0 0 9px;color:#a6f3e7;text-transform:uppercase;letter-spacing:.09em;font-size:.74rem;font-weight:800}
h1{font-size:clamp(1.85rem,3.8vw,3.1rem);line-height:1.12;margin:0 0 16px;letter-spacing:-.035em;max-width:730px}
.lead{font-size:1.05rem;color:#d4e6f9;max-width:700px;margin:0 0 22px}
.tags{display:flex;flex-wrap:wrap;gap:9px}.tags span{border:1px solid #ffffff3b;border-radius:100px;padding:5px 12px;color:#def5fd;font-size:.78rem}
.hero-visual{display:grid;place-items:center;min-height:175px}.thread-circle{height:165px;width:165px;border:16px solid #7de2d5;border-bottom-color:#317baf;border-radius:50%;display:grid;place-items:center;transform:rotate(-16deg);box-shadow:inset 0 0 20px #0b3658,0 0 42px #67d8c433}
.thread-circle span{transform:rotate(16deg);font-size:3.5rem}
main{padding-bottom:54px}.intro{margin:27px 0;color:var(--muted);max-width:830px}
.layout{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:20px;align-items:start}.layout>*{min-width:0}
.panel{background:var(--card);padding:clamp(17px,2.4vw,28px);border:1px solid var(--line);border-radius:17px;box-shadow:0 8px 20px #172f5310;margin-bottom:20px}
.panel h2{margin:0 0 8px;color:var(--navy);font-size:1.28rem;line-height:1.26}.panel h3{font-size:1rem;margin:25px 0 9px}
.subtext,.hint,.muted{color:var(--muted)}.subtext{margin:0 0 19px;font-size:.92rem}.hint{font-size:.79rem;margin-top:4px}
.step{display:inline-grid;place-items:center;width:27px;height:27px;background:#e4f0ff;border-radius:9px;color:var(--blue);font-size:.86rem;margin-right:6px}
.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.field{display:grid;gap:4px;font-size:.88rem;font-weight:700;color:#314360;min-width:0}
input{width:100%;min-width:0;border:1px solid #b9c9dd;border-radius:10px;padding:11px 12px;color:var(--ink);background:white}
input:focus{border-color:var(--blue)}.size-row{border:1px solid var(--line);border-radius:13px;padding:13px;margin-top:12px;background:#f9fbff}
.size-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:.86rem;font-weight:750}
.size-fields{display:grid;grid-template-columns:1.1fr 1fr .8fr;gap:10px}
button{border-radius:10px;padding:11px 15px;border:1px solid transparent;font-weight:750;line-height:1.25}
.primary{background:var(--blue);color:#fff}.primary:hover{background:#063c83}
.secondary{background:#e8f1ff;color:#174b84;border-color:#c7dafa}.secondary:hover{background:#dceaff}
.plain{background:#fff;color:#304a65;border-color:#bdcce0}.plain:hover{background:#f3f8ff}
.remove-size{font-size:.74rem;padding:7px 9px;background:#fff5f5;color:#a22c42;border-color:#f0cdd3}
.actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:19px}
.error{border-left:4px solid var(--error);border-radius:8px;background:#fff0f2;color:#852032;padding:12px 14px;margin-top:15px}
.empty{background:#f5f9ff;border:1px dashed #b6cbe5;border-radius:12px;padding:24px;text-align:center;color:#3b5577}
.empty strong{display:block;color:var(--navy);font-size:1.03rem}.empty p{margin:7px 0 0}
.big-metric{border-radius:14px;background:linear-gradient(115deg,#0b2d5b,#0b5a80);padding:21px;color:white}
.big-metric small{display:block;color:#cde6fb}.big-metric strong{display:block;font-size:clamp(2rem,5vw,2.65rem);line-height:1.13;margin:9px 0}
.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:12px}
.metric{border-radius:12px;border:1px solid var(--line);padding:13px;background:#fbfdff;min-width:0}
.metric small{display:block;color:var(--muted);font-size:.75rem}
.metric strong{display:block;font-size:1.18rem;color:#0a3f7f;line-height:1.4;overflow-wrap:anywhere}
.table-wrap{width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;font-size:.83rem;min-width:450px;text-align:left}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{background:#eaf3ff;color:#244362}tbody tr:last-child td{border:0}
.notice{border-left:4px solid #17a7a1;background:#f0fbf9;padding:12px 14px;border-radius:8px;font-size:.88rem}
.cta{background:#0b2145;color:white;border-radius:16px;padding:24px;margin-top:20px}
.cta h2{color:#fff}.cta p{color:#dae9fb}.cta a{display:inline-flex;background:#76efe0;color:#062d40;border-radius:9px;padding:11px 17px;font-weight:800;text-decoration:none}
.cta small{display:block;margin-top:13px;color:#bcd4e9}
.article-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:12px}
.article-grid .panel{margin:0}.article-grid p,.article-grid li{color:#4b5f7c;font-size:.95rem}
.article-grid ul{padding-left:20px}.related{margin:24px 0}.related a{margin-right:18px}
#calculated[hidden],#empty-results[hidden],[hidden]{display:none!important}
@media(max-width:900px){.layout{grid-template-columns:minmax(0,1fr)}.hero{grid-template-columns:1fr}.hero-visual{display:none}}
@media(max-width:560px){.wrapper{width:calc(100% - 24px)}.hero{border-radius:15px}.field-grid{grid-template-columns:1fr}.size-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.size-fields .field:first-child{grid-column:1/-1}.metric-grid{grid-template-columns:1fr 1fr}.metric strong{font-size:1rem}.actions button{flex:1 1 auto}h1{font-size:1.95rem}.article-grid{grid-template-columns:1fr}}
@media(max-width:350px){.metric-grid{grid-template-columns:1fr}.tags span{font-size:.69rem}}
@media print{body{background:#fff}.site-top,.breadcrumbs,.hero-visual,.actions,.cta,.related,.remove-size,#add-size,#example,#reset{display:none!important}.wrapper{width:100%}.hero{background:#fff!important;color:#111;box-shadow:none;padding:0}.hero *{color:#111!important}.layout,.article-grid{display:block}.panel{box-shadow:none;break-inside:avoid}.table-wrap{overflow:visible}table{min-width:0;font-size:9pt}.size-row{break-inside:avoid}}