/* BNS Motor Sizer — corporate sharp industrial */
:root{
  --navy:#0a1628;--navy-2:#132337;--blue:#0f4c9c;--blue-bright:#1a6fd4;
  --line:#d5dee8;--line-strong:#b8c4d4;--muted:#5a6b7d;
  --ok:#0a7a56;--warn:#b86a00;--bad:#c62828;--bg:#f3f6f9;--text:#0e1a2b;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Pretendard","Noto Sans KR",system-ui,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.55}
a{color:var(--blue);text-decoration:none}a:hover{color:var(--blue-bright)}
button,input,select{font:inherit}
.wrap{width:min(1120px,calc(100% - 40px));margin:0 auto}
.top{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line)}
.bar{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:60px}
.logo{font-weight:800;font-size:17px;letter-spacing:-.03em;color:var(--navy)}.logo span{color:var(--blue)}
.logo small{display:block;font-size:10px;letter-spacing:.12em;color:var(--muted);margin-top:2px;font-weight:700}
.nav-desktop{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.nav-desktop a{color:var(--muted);font-weight:700;font-size:13px;padding:8px 10px;border-radius:6px}
.nav-desktop a.on,.nav-desktop a:hover{color:var(--navy);background:#eef2f6}
.hamburger{display:none;width:42px;height:42px;border:1px solid var(--line-strong);border-radius:6px;background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer}
.hamburger span{display:block;width:18px;height:2px;background:var(--navy);border-radius:1px;transition:.2s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{position:fixed;inset:60px 0 0 auto;width:min(320px,100%);background:#fff;border-left:1px solid var(--line);box-shadow:-12px 0 32px rgba(10,22,40,.1);padding:18px;transform:translateX(110%);transition:transform .25s ease;z-index:50;overflow:auto}
.drawer.open{transform:translateX(0)}.drawer h3{margin:0 0 10px;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.drawer a,.drawer button.tab-link{display:block;width:100%;text-align:left;border:0;background:transparent;padding:11px 10px;border-radius:6px;font-weight:700;color:var(--navy);cursor:pointer}
.drawer a:hover,.drawer button.tab-link:hover,.drawer button.tab-link.on{background:#eef2f6;color:var(--blue)}
.backdrop{position:fixed;inset:60px 0 0;background:rgba(10,22,40,.55);opacity:0;pointer-events:none;transition:.2s;z-index:45}
.backdrop.open{opacity:1;pointer-events:auto}
.hero{margin:0 0 16px;padding:32px 0 28px;background:var(--navy);color:#fff;border-bottom:3px solid var(--blue)}
.hero .wrap{display:grid;grid-template-columns:1.4fr .8fr;gap:18px}
.hero h1{margin:8px 0 10px;font-size:clamp(24px,3.2vw,34px);letter-spacing:-.03em;font-weight:800;line-height:1.25}
.hero p{margin:0;color:#b7c5d8;line-height:1.55;max-width:54ch;font-size:15px}
.tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#7eb0ff}
.stats{display:grid;gap:0}.stats div{padding:12px 0;border-top:1px solid #24344c}.stats strong{display:block;font-size:16px;font-weight:800}.stats span{color:#8fa0b8;font-size:12px}
.tabs-shell{position:sticky;top:60px;z-index:30;background:var(--bg);padding:10px 0 12px;margin:0}
.tabs{position:relative;display:flex;gap:4px;overflow:auto;scrollbar-width:none;padding:4px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 1px 2px rgba(10,22,40,.06)}
.tabs::-webkit-scrollbar{display:none}
.tab{position:relative;z-index:1;flex:0 0 auto;border:0;background:transparent;color:var(--muted);font-weight:700;font-size:13px;padding:10px 12px;border-radius:6px;cursor:pointer}
.tab.on{color:#fff}.tab-indicator{position:absolute;top:4px;left:0;height:calc(100% - 8px);background:var(--navy);border-radius:6px;transition:transform .25s ease,width .25s ease;pointer-events:none}
.panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px;box-shadow:0 1px 2px rgba(10,22,40,.06),0 8px 24px rgba(10,22,40,.05)}
.panel h2{margin:0 0 14px;font-size:15px;font-weight:800;color:var(--navy);padding-bottom:10px;border-bottom:1px solid var(--line)}
.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
label{display:block;font-size:12px;font-weight:700;color:var(--muted);margin-bottom:5px}
input,select{width:100%;border:1px solid var(--line-strong);border-radius:6px;padding:10px 11px;background:#fff;color:var(--text)}
input:focus,select:focus{outline:2px solid rgba(15,76,156,.25);border-color:var(--blue)}
.unit{float:right;color:#97a3b5;font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);background:#fff;border-radius:6px;padding:9px 14px;font-weight:700;font-size:13px;cursor:pointer;color:var(--navy);min-height:40px}
.btn:hover{border-color:var(--blue);color:var(--blue)}
.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}.btn.primary:hover{background:var(--blue-bright);color:#fff}
.btn.dark{background:var(--navy);border-color:var(--navy);color:#fff}.btn.dark:hover{background:var(--navy-2);color:#fff}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}.toolbar .btn.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.layout{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
.result-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:12px}
.pass{display:inline-flex;align-items:center;gap:6px;background:#e5f6ef;color:var(--ok);font-weight:800;padding:5px 10px;border-radius:4px;font-size:12px}
.fail{background:#fde8e8;color:var(--bad)}.metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.metric{background:#f7f9fc;border:1px solid var(--line);border-radius:6px;padding:12px}.metric span{display:block;color:var(--muted);font-size:12px;font-weight:700}.metric strong{font-size:20px;letter-spacing:-.02em}
.load{font-size:40px;font-weight:800;color:var(--blue);line-height:1;letter-spacing:-.03em}.hint{color:var(--muted);font-size:12px;line-height:1.5;margin-top:10px}
.table{width:100%;border-collapse:collapse;font-size:13px}.table th,.table td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left}
.table th{font-size:11px;font-weight:800;color:var(--muted);background:#f7f9fc}
.chart{width:100%;height:180px;background:#f7f9fc;border:1px solid var(--line);border-radius:6px;margin-top:12px}
.hidden{display:none!important}.crumb{margin:8px 0 12px;color:var(--muted);font-size:13px}
.foot{margin-top:40px;padding:22px 0;border-top:1px solid var(--line);color:var(--muted);font-size:12px;background:#fff}
.tab-panel{animation:tabIn .28s ease}.seo-list{margin:18px 0 28px;padding:16px;border:1px solid var(--line);border-radius:8px;background:#fff}
.seo-list h2{margin:0 0 10px;font-size:15px;font-weight:800}.seo-list ul{margin:0;padding-left:18px;line-height:1.8}
@keyframes tabIn{from{opacity:0;transform:translateX(8px)}to{opacity:1;transform:none}}
@media(max-width:900px){
  .nav-desktop{display:none}.hamburger{display:flex}
  .hero .wrap,.layout,.form,.metrics{grid-template-columns:1fr}
  .tabs-shell{top:60px}
}