/* ── Site tools: the on-page calculators ──────────────────────────────────────
   One stylesheet for every calculator, so a new one is a page of maths and
   nothing else. Inputs on the left, answers on the right; on a phone the
   answers come first, because that is what the visitor came for. */

.calc-wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

.calc-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 22px; align-items: start; padding: 26px 0 60px; }
@media (max-width: 900px) { .calc-grid { grid-template-columns: 1fr; } }

.calc-panel { background: #fff; border: 1px solid rgba(15, 23, 42, 0.10); }
.calc-panel-hd {
  padding: 14px 18px; border-bottom: 1px solid rgba(15, 23, 42, 0.08); background: #f8fafc;
  font-size: 10px; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; color: #F97316;
}
.calc-panel-bd { padding: 18px; }

/* inputs */
.calc-f { margin-bottom: 14px; }
.calc-f > label { display: block; font-size: 10px; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; color: #94a3b8; margin-bottom: 5px; }
.calc-in { display: flex; align-items: stretch; }
.calc-in input, .calc-in select {
  width: 100%; box-sizing: border-box; padding: 11px 12px; font-family: inherit; font-size: 14px; color: #0F172A;
  border: 1px solid rgba(15, 23, 42, 0.16); background: #fff; outline: none; -moz-appearance: textfield;
}
.calc-in select { cursor: pointer; }
.calc-in input:focus, .calc-in select:focus { border-color: #F97316; box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.14); }
.calc-unit {
  display: flex; align-items: center; padding: 0 12px; border: 1px solid rgba(15, 23, 42, 0.16); border-left: 0;
  background: #f8fafc; font-size: 11.5px; font-weight: 700; color: #64748b; white-space: nowrap;
}
.calc-hint { display: block; font-size: 11px; color: #94a3b8; line-height: 1.5; margin-top: 4px; }
.calc-two { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
@media (max-width: 520px) { .calc-two { grid-template-columns: 1fr; } }

/* answers */
.calc-head { display: grid; grid-template-columns: repeat(auto-fit, minmax(135px, 1fr)); gap: 1px; background: rgba(15, 23, 42, 0.08); }
.calc-head-cell { background: #fff; padding: 14px 16px; }
.calc-head-cell .k { font-size: 9.5px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: #94a3b8; }
.calc-head-cell .v { font-size: 25px; font-weight: 800; color: #0F172A; line-height: 1.2; margin-top: 4px; font-family: 'Space Grotesk', system-ui, sans-serif; }
.calc-head-cell .v small { font-size: 13px; font-weight: 700; color: #64748b; margin-left: 3px; }
.calc-head-cell .n { font-size: 11px; color: #94a3b8; margin-top: 3px; line-height: 1.5; }

.calc-rows { width: 100%; border-collapse: collapse; }
.calc-rows td { padding: 9px 18px; border-bottom: 1px solid rgba(15, 23, 42, 0.06); font-size: 13px; color: #475569; }
.calc-rows tr:last-child td { border-bottom: 0; }
.calc-rows td:last-child { text-align: right; font-weight: 700; color: #0F172A; white-space: nowrap; }
.calc-rows tr.sum td { background: #f8fafc; font-weight: 800; color: #0F172A; }

.calc-note { padding: 12px 18px; font-size: 12px; line-height: 1.6; color: #64748b; border-top: 1px solid rgba(15, 23, 42, 0.06); }
.calc-warn {
  display: flex; gap: 9px; padding: 12px 18px; font-size: 12.5px; line-height: 1.55;
  background: #FEF2F2; color: #B91C1C; border-top: 1px solid #FECACA;
}
.calc-ok { background: #F0FDF4; color: #15803D; border-top-color: #BBF7D0; }

.calc-cta { display: flex; gap: 8px; flex-wrap: wrap; padding: 16px 18px; border-top: 1px solid rgba(15, 23, 42, 0.08); background: #f8fafc; }
.calc-cta .sbtn { flex: 1; min-width: 150px; }

/* assumptions / method, kept visible — an estimate nobody can check is no use */
.calc-method { border: 1px solid rgba(15, 23, 42, 0.10); background: #fff; padding: 18px; margin-bottom: 22px; }
.calc-method h2 { font-size: 13px; font-weight: 800; color: #0F172A; margin: 0 0 8px; }
.calc-method ul { margin: 0; padding-left: 18px; }
.calc-method li { font-size: 12.5px; color: #64748b; line-height: 1.75; }

/* the index of tools */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 16px; padding: 26px 0 20px; }
.tool-card {
  display: flex; flex-direction: column; gap: 9px; padding: 20px; background: #fff; text-decoration: none;
  border: 1px solid rgba(15, 23, 42, 0.10); transition: border-color .18s, box-shadow .18s, transform .18s;
}
.tool-card:hover { border-color: rgba(249, 115, 22, 0.5); box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08); transform: translateY(-2px); }
.tool-card .ic { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; background: #F9731614; border: 1px solid #F9731633; color: #F97316; }
.tool-card h3 { margin: 0; font-size: 15px; font-weight: 800; color: #0F172A; }
.tool-card p { margin: 0; font-size: 12.5px; color: #64748b; line-height: 1.65; flex: 1; }
.tool-card .go { font-size: 10px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: #F97316; }

.calc-nav { display: flex; gap: 7px; flex-wrap: wrap; padding: 18px 0 0; }
.calc-nav a {
  font-size: 11px; font-weight: 700; padding: 7px 13px; text-decoration: none;
  border: 1px solid rgba(15, 23, 42, 0.12); background: #fff; color: #475569;
}
.calc-nav a:hover { border-color: rgba(15, 23, 42, 0.3); color: #0F172A; }
.calc-nav a.on { background: #0F172A; border-color: #0F172A; color: #fff; }

@media print {
  #header-slot, #footer-slot, .calc-nav, .calc-cta, #iab-btn, #ia-chat-btn { display: none !important; }
  .calc-grid { grid-template-columns: 1fr 1fr; padding-top: 0; }
  .calc-panel { break-inside: avoid; }
}