/* Reset + base */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#1c2533;background:#f7f6f2;line-height:1.55}
h1,h2,h3,h4{color:#1C3D5A;line-height:1.25;margin:0 0 .5em}
h1{font-size:clamp(1.6rem,3vw,2.2rem)}
h2{font-size:clamp(1.3rem,2.4vw,1.7rem);margin-top:2rem}
h3{font-size:1.1rem;margin-top:1.5rem}
p{margin:.5em 0}
a{color:#1C3D5A}
hr{border:none;border-top:1px solid #d8d4ca;margin:2rem 0}

/* Layout */
.container{max-width:1180px;margin:0 auto;padding:0 16px}
header.site{background:#1C3D5A;color:#fff;padding:14px 0}
header.site .container{display:flex;align-items:center;justify-content:space-between;gap:12px}
header.site .brand{font-weight:700;font-size:1.05rem;color:#fff;text-decoration:none;letter-spacing:.2px}
header.site nav a{color:#cfd9e3;text-decoration:none;margin-left:18px;font-size:.92rem}
header.site nav a:hover{color:#fff}

main{padding:18px 0 40px}
.intro{margin:8px 0 18px}
.intro p{max-width:760px;color:#374151}
.meta-line{color:#6b7280;font-size:.85rem;margin-top:-2px}
.meta-line time{font-weight:600;color:#374151}

footer.site{background:#1C3D5A;color:#cfd9e3;padding:22px 0;margin-top:40px;font-size:.9rem}
footer.site a{color:#fff}

/* AdSense slots */
.ad-slot{position:relative;display:flex;align-items:center;justify-content:center;background:#eeece5;border:1px dashed #c9c3b3;color:#8a8472;font-size:.78rem;letter-spacing:.5px;text-transform:uppercase;margin:18px 0;border-radius:8px;overflow:hidden}
.ad-slot::before{content:"Advertisement";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#8a8472;font-size:.72rem;letter-spacing:.6px;pointer-events:none;z-index:0;white-space:nowrap}
.ad-slot.ad-leaderboard{height:90px!important;min-height:90px!important;max-height:90px!important}
.ad-slot.ad-rectangle{height:280px!important;min-height:280px!important;max-height:280px!important}
.ad-slot.ad-mobile{height:100px!important;min-height:100px!important;max-height:100px!important}
.ad-slot ins{position:relative!important;z-index:1;display:block!important;width:100%!important;height:100%!important;max-height:100%!important}
@media(max-width:600px){
  .ad-slot.ad-leaderboard{height:100px}
  .ad-slot.ad-rectangle{height:250px}
}

/* Calculator card */
.calc-card{background:#fff;border:1px solid #e3dfd2;border-radius:14px;box-shadow:0 1px 0 rgba(28,61,90,.04),0 8px 24px rgba(28,61,90,.06);padding:18px;margin:8px 0 18px}
.calc-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.unit-toggle{display:inline-flex;background:#E8E4DC;border-radius:999px;padding:3px;gap:2px}
.unit-toggle button{background:transparent;border:0;padding:7px 14px;border-radius:999px;font-weight:600;font-size:.85rem;color:#1C3D5A;cursor:pointer;min-height:36px}
.unit-toggle button[aria-pressed="true"]{background:#1C3D5A;color:#fff}

/* Shape tabs */
.shape-tabs{display:flex;gap:8px;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:6px -4px 14px;padding:4px;scrollbar-width:none}
.shape-tabs::-webkit-scrollbar{display:none}
.shape-tab{flex:0 0 auto;background:#E8E4DC;color:#1C3D5A;border:1px solid transparent;border-radius:10px;padding:10px 16px;font-weight:600;font-size:.95rem;cursor:pointer;min-height:44px;display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.shape-tab:hover{background:#dcd6c5}
.shape-tab[aria-selected="true"]{background:#1C3D5A;color:#fff;border-color:#1C3D5A;box-shadow:0 2px 6px rgba(28,61,90,.18)}
.shape-tab .ico{font-size:1.05rem}

/* Two-column layout inside calculator */
.calc-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:880px){.calc-grid{grid-template-columns:1.05fr 1fr;gap:26px}}

.inputs h3,.results h3{margin:0 0 10px;font-size:.85rem;letter-spacing:.6px;text-transform:uppercase;color:#6b7280}
.field{margin-bottom:12px}
.field label{display:block;font-size:.88rem;font-weight:600;color:#374151;margin-bottom:5px}
.field .row{display:flex;gap:8px;align-items:center}
.field input[type="number"],.field select{width:100%;padding:11px 12px;border:1px solid #d6d2c4;border-radius:8px;font-size:1rem;font-family:inherit;background:#fff;color:#1c2533;min-height:44px}
.field input:focus,.field select:focus{outline:2px solid #1C3D5A;outline-offset:1px;border-color:#1C3D5A}
.field .suffix{color:#6b7280;font-size:.85rem;min-width:36px;text-align:right}
.field .help{color:#6b7280;font-size:.78rem;margin-top:3px}

.btn-group{display:inline-flex;background:#E8E4DC;border-radius:8px;padding:3px;gap:2px;flex-wrap:wrap}
.btn-group button{background:transparent;border:0;padding:8px 14px;border-radius:6px;font-weight:600;font-size:.88rem;color:#1C3D5A;cursor:pointer;min-height:36px}
.btn-group button[aria-pressed="true"]{background:#1C3D5A;color:#fff}

/* Diagram */
.diagram{background:#fafaf6;border:1px solid #ece8db;border-radius:10px;padding:10px;margin-bottom:14px;min-height:120px;display:flex;align-items:center;justify-content:center}
.diagram svg{max-width:100%;height:auto;display:block}

/* Results */
.results{background:#fafaf6;border:1px solid #ece8db;border-radius:10px;padding:16px}
.kpi{display:grid;grid-template-columns:1fr;gap:10px;margin-bottom:12px}
.kpi .row{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.kpi .label{color:#6b7280;font-size:.85rem}
.kpi .val{font-weight:700;font-size:1.1rem;color:#1C3D5A;font-variant-numeric:tabular-nums}

.bag-headline{background:#1C3D5A;color:#fff;border-radius:10px;padding:14px 16px;margin:6px 0 14px;display:flex;flex-direction:column;gap:2px}
.bag-headline .lead{font-size:.78rem;text-transform:uppercase;letter-spacing:.6px;color:#cfd9e3}
.bag-headline .num{font-size:2rem;font-weight:800;color:#F97316;font-variant-numeric:tabular-nums;line-height:1.1}
.bag-headline .sub{font-size:.92rem;color:#fff;opacity:.95}

.bag-tabs{display:inline-flex;background:#fff;border:1px solid #d6d2c4;border-radius:8px;padding:3px;margin-bottom:6px;gap:2px}
.bag-tabs button{background:transparent;border:0;padding:7px 12px;border-radius:6px;font-weight:600;font-size:.85rem;color:#1C3D5A;cursor:pointer;min-height:36px}
.bag-tabs button[aria-pressed="true"]{background:#1C3D5A;color:#fff}

.cost-block{border-top:1px solid #e3dfd2;margin-top:10px;padding-top:10px}
.cost-row{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin:6px 0}
.cost-row .label{color:#374151;font-size:.9rem;font-weight:600}
.cost-row .val{font-weight:700;color:#1C3D5A;font-variant-numeric:tabular-nums}
.cost-edit{display:flex;align-items:center;gap:6px;color:#6b7280;font-size:.82rem}
.cost-edit input{width:80px;padding:5px 7px;border:1px solid #d6d2c4;border-radius:6px;font-size:.85rem}

.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.actions button{background:#fff;border:1px solid #d6d2c4;border-radius:8px;padding:9px 14px;font-weight:600;font-size:.88rem;color:#1C3D5A;cursor:pointer;min-height:40px}
.actions button:hover{background:#f1ede0}
.actions .primary{background:#1C3D5A;color:#fff;border-color:#1C3D5A}
.actions .primary:hover{background:#142d44}

/* Tab panel transitions */
[role="tabpanel"][hidden]{display:none}

/* Bag reference tables */
.def-card{background:#fff;border-left:4px solid #F97316;padding:14px 16px;border-radius:6px;margin:14px 0;font-size:.95rem}
.def-card strong{color:#1C3D5A}

table.ref{width:100%;border-collapse:collapse;background:#fff;border:1px solid #e3dfd2;border-radius:10px;overflow:hidden;margin:14px 0;font-size:.92rem}
table.ref th,table.ref td{padding:10px 12px;border-bottom:1px solid #ece8db;text-align:left}
table.ref th{background:#1C3D5A;color:#fff;font-weight:600;font-size:.86rem;letter-spacing:.3px}
table.ref tr:last-child td{border-bottom:0}
table.ref tr:nth-child(even) td{background:#fafaf6}

/* FAQ */
details.faq{background:#fff;border:1px solid #e3dfd2;border-radius:10px;padding:0;margin:8px 0}
details.faq summary{padding:14px 16px;cursor:pointer;font-weight:600;color:#1C3D5A;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px;min-height:44px}
details.faq summary::after{content:"+";color:#F97316;font-size:1.3rem;font-weight:700;transition:transform .2s}
details.faq[open] summary::after{content:"−"}
details.faq[open] summary{border-bottom:1px solid #ece8db}
details.faq .body{padding:12px 16px 16px;color:#374151}

/* Mix calculator accordion */
details.mix{background:#fff;border:1px solid #e3dfd2;border-radius:10px;margin:14px 0}
details.mix summary{padding:14px 16px;font-weight:700;cursor:pointer;color:#1C3D5A;list-style:none;display:flex;justify-content:space-between;align-items:center}
details.mix summary::after{content:"▾";color:#F97316;transition:transform .2s}
details.mix[open] summary::after{transform:rotate(180deg)}
details.mix .body{padding:14px 16px;border-top:1px solid #ece8db}

/* Toast */
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:#1C3D5A;color:#fff;padding:11px 18px;border-radius:8px;font-size:.9rem;opacity:0;pointer-events:none;transition:all .25s;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Print */
@media print{
  header.site,footer.site,.ad-slot,.actions,.shape-tabs,.unit-toggle,.bag-tabs,details.mix,details.faq{display:none!important}
  body{background:#fff}
  .calc-card{box-shadow:none;border:1px solid #999}
  .container{max-width:100%;padding:0}
}

@media(max-width:560px){
  header.site nav a{margin-left:10px;font-size:.85rem}
  .calc-card{padding:14px}
  .bag-headline .num{font-size:1.7rem}
}


/* ----- Embed snippet card (homepage section #embed) ----- */
.embed-snippet-card{background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;padding:16px;margin:16px 0;}
.embed-snippet-label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;color:#334155;}
.embed-snippet-text{width:100%;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:12px;line-height:1.5;padding:10px;border:1px solid #cbd5e1;border-radius:4px;background:#fff;resize:vertical;box-sizing:border-box;color:#0f172a;}
.btn-copy{margin-top:8px;padding:8px 14px;background:#1C3D5A;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:13px;font-weight:500;}
.btn-copy:hover{filter:brightness(1.15);}
.btn-copy:active{filter:brightness(0.9);}