.ta-so-calc{ --p:#b13535; --p2:#d04a4a; --bg:#f7f7fb; --card:#fff; --ink:#121212; --muted:#6b7280; --b:#e5e7eb;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color:var(--ink);
  max-width: 620px; margin: 0 auto; background: var(--bg); border:1px solid var(--b); border-radius:14px; padding:12px;
  position:relative;
}
.ta-so-calc *{ box-sizing:border-box; }

.ta-so-calc__screen{
  background: var(--card); border:1px solid var(--b); border-radius:12px;
  padding:10px 12px; margin-bottom:10px; min-height:72px;
  display:flex; flex-direction:column; justify-content:center; gap:6px;
}
.ta-so-calc__screenrow{ display:flex; align-items:flex-start; justify-content:space-between; gap:10px; }
.ta-so-calc__badges{ display:flex; gap:6px; flex:0 0 auto; }
.ta-badge{
  display:inline-flex; align-items:center; justify-content:center;
  height:22px; padding:0 8px; border-radius:999px;
  border:1px solid var(--b); background:#fff;
  font-size:12px; font-weight:800; color:#111;
}
.ta-badge--mem{ border-color: rgba(177,53,53,.28); background: rgba(177,53,53,.06); color: var(--p); }

.ta-so-calc__expr{
  font-size: 20px; line-height: 1.2; font-weight: 700;
  word-break: break-word;
  flex:1 1 auto;
}
.ta-so-calc__result{
  font-size: 18px; color: var(--ink);
  min-height: 22px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.ta-so-calc__keys{
  display:grid; grid-template-columns: repeat(6, 1fr);
  gap:8px;
}
.ta-so-calc .k{
  appearance:none; border:1px solid var(--b); background: var(--card);
  border-radius:12px; padding:12px 6px;
  font-size: 18px; font-weight: 700; line-height: 1;
  cursor:pointer;
  transition: transform .03s ease, border-color .12s ease;
  user-select:none;
  min-height: 44px;
}
.ta-so-calc .k:active{ transform: translateY(1px); }
.ta-so-calc .k:focus{ outline: none; border-color: var(--p2); box-shadow: 0 0 0 3px rgba(177,53,53,.12); }
.ta-so-calc .k--fn{ font-size: 15px; font-weight: 850; }
.ta-so-calc .k--op{ border-color: rgba(177,53,53,.25); }
.ta-so-calc .k--eq{ background: var(--p); color:#fff; border-color: var(--p); }
.ta-so-calc .k--sp{ visibility:hidden; border:none; background:transparent; }

.ta-so-calc__actions{
  margin-top:10px;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.ta-act{
  appearance:none;
  border:1px solid var(--b);
  background: #fff;
  border-radius: 12px;
  padding:10px 10px;
  font-size: 13px;
  font-weight: 800;
  cursor:pointer;
  user-select:none;
}
.ta-act:active{ transform: translateY(1px); }
.ta-act:focus{ outline:none; border-color: var(--p2); box-shadow: 0 0 0 3px rgba(177,53,53,.12); }
.ta-act--pri{ background: rgba(177,53,53,.08); border-color: rgba(177,53,53,.25); }

.ta-so-calc__history{
  margin-top:10px;
  background: var(--card);
  border:1px solid var(--b);
  border-radius: 14px;
  overflow:hidden;
}
.ta-h-head{
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 12px;
  border-bottom:1px solid var(--b);
  background: linear-gradient(180deg, rgba(177,53,53,.06), rgba(177,53,53,0));
}
.ta-h-title{ font-weight: 900; }
.ta-h-clear{
  appearance:none; border:1px solid var(--b); background:#fff;
  border-radius: 10px; padding:6px 10px;
  font-size: 12px; font-weight: 800; cursor:pointer;
}
.ta-h-clear:focus{ outline:none; border-color: var(--p2); box-shadow: 0 0 0 3px rgba(177,53,53,.12); }
.ta-h-empty{ padding:10px 12px; color: var(--muted); font-size: 13px; }
.ta-h-list{ display:flex; flex-direction:column; }
.ta-h-item{
  display:flex; align-items:center; gap:10px;
  padding:10px 12px;
  border-top:1px solid var(--b);
}
.ta-h-item:first-child{ border-top:none; }
.ta-h-line{ flex:1 1 auto; min-width:0; }
.ta-h-e{ font-weight: 800; display:block; word-break: break-word; }
.ta-h-r{ color: var(--muted); font-size: 13px; display:block; margin-top:2px; font-variant-numeric: tabular-nums; }
.ta-h-btns{ display:flex; gap:6px; flex:0 0 auto; }
.ta-h-btn{
  appearance:none; border:1px solid var(--b); background:#fff;
  border-radius: 10px; padding:7px 9px;
  font-size: 12px; font-weight: 900; cursor:pointer;
}
.ta-h-btn:focus{ outline:none; border-color: var(--p2); box-shadow: 0 0 0 3px rgba(177,53,53,.12); }

.ta-so-calc__toast{
  position:absolute;
  top:10px;
  right:10px;
  max-width: 240px;
  padding:8px 10px;
  border-radius: 12px;
  border:1px solid var(--b);
  background:#fff;
  font-size: 13px;
  font-weight: 800;
  color:#111;
  box-shadow: 0 10px 30px rgba(0,0,0,.10);
  opacity:0;
  transform: translateY(-4px);
  pointer-events:none;
  transition: opacity .18s ease, transform .18s ease;
}
.ta-so-calc__toast.show{ opacity:1; transform: translateY(0); }

.ta-so-calc__hint{
  margin-top:10px; font-size:12px; color:var(--muted);
  line-height: 1.35;
}

/* Fullscreen (CSS fallback + helper class) */
body.ta-calc-body-fs{ overflow:hidden !important; }
.ta-so-calc.ta-fs{
  position:fixed !important;
  inset:0 !important;
  width:100vw !important;
  height:100vh !important;
  max-width:none !important;
  margin:0 !important;
  border-radius:0 !important;
  z-index: 999999 !important;
  overflow:auto !important;
  padding:12px !important;
}



/* Modal / tools panels */
.ta-so-calc__modal{
  position:fixed;
  inset:0;
  z-index: 1000001;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:14px;
}
.ta-so-calc__modal[hidden]{ display:none !important; }
.ta-modal__backdrop{
  position:absolute; inset:0;
  border:0; padding:0;
  background: rgba(0,0,0,.35);
  cursor:pointer;
}
.ta-modal__card{
  position:relative;
  width:min(720px, 100%);
  max-height:min(84vh, 760px);
  overflow:auto;
  background: var(--card);
  border:1px solid var(--b);
  border-radius:14px;
  box-shadow:0 18px 60px rgba(0,0,0,.25);
}
.ta-modal__head{
  display:flex; align-items:center; justify-content:space-between;
  gap:12px;
  padding:12px 14px;
  border-bottom:1px solid var(--b);
  position:sticky; top:0; background: var(--card);
  z-index:1;
}
.ta-modal__title{ font-weight:900; font-size:14px; }
.ta-modal__close{
  appearance:none; border:1px solid var(--b); background: var(--bg);
  border-radius:10px; padding:8px 10px;
  cursor:pointer; font-weight:900; line-height:1;
}
.ta-modal__close:active{ transform: translateY(1px); }
.ta-modal__body{ padding:14px; }

.ta-view-lead{ font-weight:800; margin:0 0 10px; }
.ta-view-note{ margin-top:10px; color: var(--muted); font-size: 12px; }



.ta-btnrow{ display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.ta-mini{
  appearance:none; border:1px solid var(--b); background: var(--bg);
  border-radius:12px;
  padding:10px 12px;
  cursor:pointer;
  font-weight:800;
  font-size:13px;
}
.ta-mini:active{ transform: translateY(1px); }
.ta-mini--pri{
  background: var(--p);
  color:#fff;
  border-color: var(--p);
}

.ta-form{ display:grid; gap:10px; }
.ta-form--tight{ margin-top:10px; }
.ta-row2{ display:grid; grid-template-columns: 1fr 1fr; gap:10px; }
.ta-lbl{ display:grid; gap:6px; font-weight:800; font-size: 13px; color: #111827; }
.ta-in{
  width:100%;
  appearance:none;
  border:1px solid var(--b);
  background: var(--card);
  border-radius:12px;
  padding:10px 12px;
  font-size:14px;
}
.ta-in:focus{ outline:none; border-color: var(--p2); box-shadow: 0 0 0 3px rgba(177,53,53,.10); }

.ta-chk{
  display:flex; align-items:flex-start; gap:10px;
  font-weight:700; color:#1f2937;
}
.ta-chk input{ margin-top:3px; }

.ta-const-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:10px;
}
.ta-const-custom{ display:grid; gap:8px; margin:8px 0 0; }
.ta-const-item{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  border:1px solid var(--b);
  border-radius:12px;
  padding:10px 12px;
  background: var(--card);
}
.ta-const-item b{ font-weight:900; }
.ta-const-item small{ color: var(--muted); font-weight:700; }
.ta-const-actions{ display:flex; gap:8px; }
.ta-const-btn{
  appearance:none; border:1px solid var(--b); background: var(--bg);
  border-radius:12px;
  padding:10px 12px;
  cursor:pointer; font-weight:900;
  text-align:center;
}
.ta-const-btn:active{ transform: translateY(1px); }
.ta-const-btn--pri{
  background: rgba(177,53,53,.08);
  border-color: rgba(177,53,53,.25);
}

.ta-sep{ height:1px; background: var(--b); margin:14px 0; }
@media (max-width: 520px){
  .ta-row2{ grid-template-columns: 1fr; }
  .ta-const-grid{ grid-template-columns: repeat(2, 1fr); }
  }


@media (max-width: 420px){
  .ta-so-calc{ padding:10px; }
  .ta-so-calc .k{ padding:12px 4px; font-size:17px; border-radius:11px; }
  .ta-so-calc .k--fn{ font-size:14px; }
  .ta-so-calc__expr{ font-size:19px; }
  .ta-act{ padding:10px 10px; font-size: 12px; }
}