:root{--navy:#173a63;--blue:#315d86;--ink:#13202b;--muted:#637180;--line:#e3e9ef;--soft:#f5f7f9}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f5f7f9;color:var(--ink);font-family:Arial,sans-serif}button,input,select{font:inherit}a{color:inherit;text-decoration:none}
.container{width:min(1220px,calc(100% - 28px));margin:auto}.tool-page{padding:18px 0 100px}.app-header{height:72px;display:flex;align-items:center;gap:10px;padding:8px max(14px,calc((100vw - 1192px)/2));background:#fff;border-bottom:1px solid var(--line)}.app-header img{width:58px;height:58px;object-fit:contain}.app-header div{display:flex;flex-direction:column;gap:3px}.app-header strong{font-size:17px;line-height:1.15;color:var(--navy)}.app-header span{font-size:13px;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 16px;border-radius:12px;font-weight:700;border:1px solid var(--line);background:#fff;cursor:pointer}.btn.primary{background:var(--navy);color:#fff;border-color:var(--navy)}.cut-workspace{gap:18px}.cut-controls{box-shadow:0 8px 24px rgba(17,48,80,.06)}.cut-results{scroll-margin-top:16px}.cut-note{margin-bottom:0}
.mobile-result{display:none}
@media(max-width:800px){.tool-page{padding:12px 0 96px}.cut-controls{padding:20px}.cut-workspace{gap:14px}.cut-controls fieldset{margin-bottom:18px}.cut-controls legend{margin-bottom:13px}.cut-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.cut-metric{min-height:96px}.mobile-result{position:fixed;z-index:10;bottom:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:66px;padding:9px 17px calc(9px + env(safe-area-inset-bottom));background:var(--navy);color:white;box-shadow:0 -8px 22px rgba(17,48,80,.18)}.mobile-result span{display:flex;flex-direction:column;gap:3px;font-size:11px;color:#dceaf4}.mobile-result strong{font-size:19px;color:white}.mobile-result span:last-child{font-size:21px;color:white}.cut-diagram{overflow:hidden}.cut-buttons .btn{min-height:46px}}
@media(max-width:380px){.mode-options{grid-template-columns:repeat(3,minmax(0,1fr))}.mode-options span{font-size:12px}.cut-controls{padding:15px}.dimension-fields{gap:6px}.cut-metric strong{font-size:27px}}