/* Stack Builder + Real-cost calculator */
.stack-section{padding-top:96px}
.stack-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}
.stack-opt{display:flex;align-items:center;gap:12px;text-align:left;border:1px solid var(--line);background:#fff;border-radius:16px;padding:16px 18px;font:inherit;font-size:15px;font-weight:800;color:var(--ink);cursor:pointer;transition:transform .25s var(--ease),border-color .25s,box-shadow .25s,background .25s,color .25s}
.stack-opt svg{width:26px;height:26px;flex-shrink:0;color:var(--accent);transition:color .25s,transform .35s var(--ease)}
.stack-opt:hover{transform:translateY(-3px);border-color:var(--ink);box-shadow:0 14px 30px rgba(21,32,51,.08)}
.stack-opt:hover svg{transform:scale(1.12) rotate(-6deg)}
.stack-opt.active{background:var(--ink);color:#fff;border-color:var(--ink);box-shadow:0 18px 40px rgba(21,32,51,.2)}
.stack-opt.active svg{color:#ff8aa0}
.stack-result{padding:30px}
.stack-head{display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:end;padding-bottom:24px;border-bottom:1px solid var(--line);margin-bottom:8px;animation:rise .5s var(--ease) both}
.stack-head .eyebrow{margin-bottom:8px}.stack-head h3{font-family:Georgia,serif;font-weight:500;font-size:clamp(30px,3.4vw,42px);letter-spacing:-.05em;margin:0 0 8px}
.stack-head p{color:var(--muted);line-height:1.6;margin:0}
.stack-totals{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.stack-totals>div{background:var(--ground);border-radius:16px;padding:16px 18px}
.stack-totals small{display:block;font-size:10px;letter-spacing:.12em;font-weight:850;color:var(--muted)}
.stack-totals strong{font-family:Georgia,serif;font-size:34px;font-weight:500;letter-spacing:-.04em}
.stack-totals strong span{font-family:inherit;font-size:15px;color:var(--muted)}
.stack-totals>div:first-child strong{color:var(--green)}
.stack-totals em{display:block;font-style:normal;font-size:12px;color:var(--muted);line-height:1.4;margin-top:4px}
.stack-steps{list-style:none;margin:0;padding:0;position:relative}
.stack-steps:before{content:"";position:absolute;left:17px;top:30px;bottom:30px;width:2px;background:linear-gradient(var(--accent),rgba(226,75,103,.1))}
.stack-step{display:grid;grid-template-columns:36px 38px 1fr auto;gap:16px;align-items:center;padding:18px 0;border-bottom:1px dashed var(--line);animation:rise .55s var(--ease) both;animation-delay:calc(var(--i)*90ms + 120ms)}
.stack-step:last-child{border-bottom:0}
.step-n{position:relative;z-index:1;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#fff;border:2px solid var(--accent);color:var(--accent);font-weight:850;font-size:14px}
.step-body small{display:block;font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:850;color:var(--muted)}
.step-body b{font-size:18px;letter-spacing:-.03em}
.step-body p{margin:3px 0 0;color:var(--muted);font-size:14px;line-height:1.5;max-width:560px}
.step-cta{display:flex;flex-direction:column;align-items:flex-end;gap:7px;min-width:190px}
.step-price{font-size:12px;font-weight:800;color:var(--green);background:rgba(31,122,90,.09);border-radius:999px;padding:4px 10px}
.step-same{font-size:13px;font-weight:750;color:var(--muted)}
.stack-btn{padding:11px 15px;font-size:13px}
.stack-alt{display:flex;align-items:center;gap:14px;background:var(--ground);border-radius:16px;padding:16px 18px;margin-top:14px;animation:rise .55s var(--ease) both;animation-delay:.55s}
.stack-alt p{flex:1;margin:0;font-size:14px;line-height:1.5;color:var(--muted)}.stack-alt b{color:var(--ink)}
.stack-note,.calc-note{display:block;margin-top:16px;font-size:11px;color:var(--muted);line-height:1.5}

.cost-section{background:linear-gradient(180deg,transparent,rgba(255,255,255,.6) 30%,transparent)}
.calc{padding:26px}
.calc-tabs{display:inline-flex;gap:4px;background:var(--ground);border-radius:14px;padding:5px;margin-bottom:24px;flex-wrap:wrap}
.calc-tabs button{border:0;background:transparent;font:inherit;font-size:14px;font-weight:800;color:var(--muted);padding:11px 16px;border-radius:10px;cursor:pointer;transition:background .25s,color .25s,box-shadow .25s}
.calc-tabs button.active{background:#fff;color:var(--ink);box-shadow:0 4px 14px rgba(21,32,51,.08)}
.calc-pane{animation:rise .45s var(--ease) both}
.calc-controls{display:flex;flex-wrap:wrap;gap:20px 34px;align-items:flex-end;margin-bottom:24px}
.calc-range{flex:1;min-width:260px}
.calc-range span,.calc-select span{display:flex;justify-content:space-between;font-size:14px;font-weight:750;color:var(--muted);margin-bottom:12px}
.calc-range b{font-family:Georgia,serif;font-size:24px;font-weight:500;color:var(--ink)}
.calc-select select{font:inherit;font-size:15px;padding:11px 12px;border:1px solid var(--line);border-radius:12px;background:#fff;min-width:260px}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:8px;border-radius:999px;background:var(--line);outline:0}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;border-radius:50%;background:#fff;border:3px solid var(--accent);box-shadow:0 6px 16px rgba(226,75,103,.3);cursor:grab;transition:transform .2s var(--ease)}
input[type=range]::-webkit-slider-thumb:active{transform:scale(1.15);cursor:grabbing}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:3px solid var(--accent);cursor:grab}
.calc-switch{display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:800;cursor:pointer;padding-bottom:4px}
.calc-switch input{position:absolute;opacity:0}
.calc-switch span{width:44px;height:26px;border-radius:999px;background:var(--line);position:relative;transition:background .25s}
.calc-switch span:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.15);transition:transform .3s var(--ease)}
.calc-switch input:checked+span{background:var(--green)}.calc-switch input:checked+span:after{transform:translateX(18px)}
.cbars{display:grid;gap:12px}
.cbar{display:grid;grid-template-columns:200px 1fr 150px;gap:18px;align-items:center;border:1px solid var(--line);border-radius:16px;padding:14px 16px;background:#fff;transition:border-color .3s,box-shadow .3s}
.cbar.best{border-color:var(--green);box-shadow:0 10px 26px rgba(31,122,90,.12)}
.cbar-label{display:flex;align-items:center;gap:11px}.cbar-label b{display:block;font-size:15px}.cbar-label small{color:var(--muted);font-size:12px}
.cbar-track{height:12px;border-radius:999px;background:var(--ground);overflow:hidden}
.cbar-track span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--ink),#3a4a66);transition:width .7s var(--ease)}
.cbar.best .cbar-track span{background:linear-gradient(90deg,var(--green),#35a27a)}
.cbar-val{text-align:right;font-family:Georgia,serif;font-size:24px;letter-spacing:-.03em}
.cbar-val small{font-family:Inter,system-ui,sans-serif;font-size:12px;color:var(--muted)}
.cbar-val em{display:block;font-style:normal;font-family:Inter,system-ui,sans-serif;font-size:11px;color:var(--muted)}
.cbar.best .cbar-val em{color:var(--green);font-weight:800}
.hbars{display:grid;gap:9px}
.hbar{display:grid;grid-template-columns:70px 1fr 90px;gap:14px;align-items:center;font-size:13px}
.hbar-y{color:var(--muted);font-weight:750}.hbar-v{text-align:right;font-weight:800}
.hbar .cbar-track span{background:linear-gradient(90deg,var(--green),#35a27a)}
.hbar .cbar-track span.warn{background:linear-gradient(90deg,var(--accent),#f07a90)}
.calc-verdict{margin:20px 0 0;font-size:16px;line-height:1.6;background:var(--ground);border-radius:14px;padding:14px 18px}
.calc-verdict:empty{display:none}
.calc-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}

@media(max-width:980px){.stack-picker{grid-template-columns:repeat(2,1fr)}.stack-head{grid-template-columns:1fr}}
@media(max-width:650px){
  .stack-result,.calc{padding:18px}
  .stack-opt{padding:13px;font-size:14px}
  .stack-step{grid-template-columns:36px 1fr;gap:10px 14px}
  .stack-step .logo-tile{display:none}
  .step-cta{grid-column:2;align-items:flex-start;min-width:0}
  .stack-alt{flex-wrap:wrap}
  .cbar{grid-template-columns:1fr auto;gap:10px}
  .cbar-track{grid-column:1/-1;grid-row:2}
  .calc-tabs{display:flex}.calc-tabs button{flex:1;padding:10px;font-size:13px}
  .calc-select select{min-width:0;width:100%}
}