/* ── Calc modal ── */
.calc-modal{
  position:fixed;inset:0;z-index:99998;
  display:flex;align-items:flex-start;justify-content:center;
  background:rgba(0,0,0,0.88);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  overflow-y:auto;
  padding:24px 16px;
}
.calc-modal[aria-hidden="true"]{display:none}
.calc-modal-backdrop{
  position:fixed;inset:0;z-index:0;
}
.calc-modal-scroll{
  position:relative;z-index:1;
  width:100%;max-width:940px;
}
.calc-modal-content{
  position:relative;
  background:var(--surface);
  border-radius:20px;
  border:1px solid var(--border);
  padding:48px 40px;
  box-shadow:0 32px 64px rgba(0,0,0,0.6);
}
.calc-close-btn{
  position:absolute;top:16px;right:16px;
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--border-accent);
  background:var(--surface-2);color:var(--text-dim);
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:background .15s,color .15s;z-index:2;
}
.calc-close-btn:hover{background:var(--accent);color:#fff}
.calc-title{
  font-size:clamp(22px,4vw,34px);font-weight:800;
  color:var(--text);margin-bottom:12px;line-height:1.25;
  padding-right:44px;
}
.calc-subtitle{
  font-size:16px;color:var(--text-dim);
  line-height:1.65;margin-bottom:32px;
}

/* Calc inputs */
.calc-inputs{
  display:flex;flex-direction:column;gap:20px;
  margin-bottom:32px;padding:24px;
  background:var(--surface-2);
  border-radius:14px;border:1px solid var(--border);
}
.calc-input-row{display:flex;gap:16px;flex-wrap:wrap}
.calc-field{flex:1;min-width:140px}
.calc-field-wide{min-width:200px}
.calc-field label{
  display:block;font-size:13px;font-weight:600;
  color:var(--text-dim);margin-bottom:6px;
}
.calc-field input[type="number"]{
  width:100%;padding:10px 14px;
  font-size:20px;font-weight:700;
  color:var(--text);
  background:var(--bg);
  border:1px solid var(--border-accent);
  border-radius:10px;outline:none;
  transition:border-color .15s;
  font-family:var(--font);
}
.calc-field input[type="number"]:focus{border-color:var(--accent)}

/* Calc slider */
.calc-slider-wrap{margin-top:4px}
.calc-slider-wrap label{
  display:block;font-size:13px;font-weight:600;
  color:var(--text-dim);margin-bottom:8px;
}
.calc-slider-wrap input[type="range"]{
  width:100%;accent-color:var(--accent);height:6px;
}
.calc-slider-labels{
  display:flex;justify-content:space-between;
  font-size:11px;color:var(--text-dim);margin-top:4px;
}

/* Calc buttons */
.calc-btn-row{display:flex;gap:12px;flex-wrap:wrap}
.calc-btn{
  padding:10px 22px;border-radius:10px;
  font-size:14px;font-weight:600;cursor:pointer;
  border:1px solid var(--border-accent);
  background:var(--surface-2);color:var(--text);
  transition:background .15s,transform .1s;
  font-family:var(--font);
}
.calc-btn:hover{background:rgba(167,139,250,.15);transform:translateY(-1px)}
.calc-btn-accent{
  background:linear-gradient(135deg,#a78bfa,#818cf8);
  border:none;color:#fff;
}
.calc-btn-accent:hover{
  background:linear-gradient(135deg,#b49cfc,#929af8);
}

/* Calc results table */
.calc-results{margin-bottom:20px}
.calc-results-table{width:100%;border-collapse:collapse}
.calc-results-table th{
  padding:8px 12px;text-align:center;
  font-size:11px;font-weight:700;color:var(--text-dim);
  text-transform:uppercase;letter-spacing:.06em;
  border-bottom:1px solid var(--border);
}
.calc-results-table td{
  padding:10px 12px;text-align:center;
  font-size:clamp(18px,3vw,26px);font-weight:800;
  color:var(--text);
  border-bottom:1px solid rgba(255,255,255,0.04);
}
.calc-row-best{background:rgba(74,222,128,0.06)}
.calc-row-best td{color:#4ade80}
.calc-best-badge{
  display:inline-block;color:#fbbf24;
  font-size:0.7em;vertical-align:0.15em;margin-right:2px;
}

/* Calc summary */
.calc-summary{
  margin-top:16px;padding:16px 20px;
  background:rgba(74,222,128,0.06);
  border:1px solid rgba(74,222,128,0.15);
  border-radius:12px;font-size:16px;
  color:#4ade80;font-weight:600;line-height:1.55;
}
.calc-summary:empty{display:none}

/* Calc chart */
.calc-chart-wrap{
  margin-bottom:12px;
  background:var(--surface-2);
  border-radius:14px;border:1px solid var(--border);
  padding:20px;
}
.calc-chart-wrap canvas{display:block;width:100%}
.calc-chart-note{
  font-size:14px;color:var(--text-dim);
  font-style:italic;margin-bottom:28px;line-height:1.6;
}

/* Calc text blocks */
.calc-block{
  margin-bottom:12px;
  background:var(--surface-2);
  border-radius:14px;border:1px solid var(--border);
}
.calc-block-summary{
  padding:18px 24px;cursor:pointer;list-style:none;
  display:flex;align-items:center;justify-content:space-between;
  transition:background .15s;
}
.calc-block-summary::-webkit-details-marker{display:none}
.calc-block-summary::after{
  content:'';display:block;width:8px;height:8px;flex-shrink:0;
  border-right:2px solid var(--text-dim);border-bottom:2px solid var(--text-dim);
  transform:rotate(45deg);transition:transform .2s;margin-left:12px;
}
.calc-block[open]>.calc-block-summary::after{transform:rotate(-135deg)}
.calc-block-summary:hover{background:rgba(167,139,250,.06)}
.calc-block h3{
  font-size:18px;font-weight:700;
  color:var(--accent);margin:0;
}
.calc-block-body{
  padding:0 24px 20px;
}
.calc-block p{
  font-size:15px;color:var(--text-dim);
  line-height:1.65;margin-bottom:8px;
}
.calc-block p:last-child{margin-bottom:0}
.calc-block strong{color:var(--text)}

/* Calc example table inside blocks */
.calc-example-table{
  width:100%;border-collapse:collapse;margin:12px 0;
}
.calc-example-table th,
.calc-example-table td{
  padding:8px 12px;text-align:left;font-size:14px;
  border-bottom:1px solid var(--border);
}
.calc-example-table th{
  font-weight:700;color:var(--text-dim);
  font-size:11px;text-transform:uppercase;
  letter-spacing:.04em;
}
.calc-example-table td{color:var(--text)}

/* Calc advanced */
.calc-advanced{margin:24px 0}
.calc-advanced summary{
  cursor:pointer;font-size:14px;font-weight:600;
  color:var(--accent);padding:8px 0;
}
.calc-advanced-inner{
  margin-top:12px;
  display:flex;gap:16px;flex-wrap:wrap;
}
.calc-adv-field{flex:1;min-width:130px}
.calc-adv-field label{
  display:block;font-size:11px;font-weight:600;
  color:var(--text-muted);margin-bottom:4px;
}
.calc-adv-field input{
  width:100%;padding:8px 10px;font-size:14px;
  color:var(--text);background:var(--bg);
  border:1px solid var(--border-accent);
  border-radius:8px;outline:none;
  font-family:var(--font);
}
.calc-adv-k-val{
  display:block;padding:8px 0;
  font-size:14px;font-weight:700;
  color:var(--accent);font-family:monospace;
}

/* Calc copy button */
.calc-copy-btn{
  display:block;width:100%;margin-top:8px;
  padding:14px;border-radius:12px;
  font-size:15px;font-weight:700;text-align:center;
  background:var(--surface-2);
  border:1px solid var(--border-accent);
  color:var(--text);cursor:pointer;
  transition:background .15s;
  font-family:var(--font);
}
.calc-copy-btn:hover{background:var(--accent);color:#fff}

@media (max-width:640px){
  .calc-modal{padding:8px}
  .calc-modal-content{padding:24px 16px}
  .calc-input-row{flex-direction:column;gap:12px}
  .calc-results-table td{font-size:16px;padding:8px 6px}
  .calc-chart-wrap{padding:12px}
  .calc-block-summary{padding:14px 16px}
  .calc-block-body{padding:0 16px 16px}
}