/* ==========================================================================
   07 · LABORATORIYALAR — interaktiv konstruktorlar va "mashinalar"
   ========================================================================== */

.lab {
  margin-top: 26px;
  background: linear-gradient(150deg, color-mix(in srgb, var(--violet) 12%, var(--surface)), var(--surface) 60%);
  border: 1px solid color-mix(in srgb, var(--violet) 28%, var(--line));
  border-radius: var(--r-xl);
  padding: 26px;
  box-shadow: var(--elev-2);
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}
.lab-head h3 { font-size: 1.32rem; }
.lab-head p { color: var(--ink-2); font-size: .95rem; }
.lab-body { margin-top: 16px; }

/* ---------- + / − boshqaruvi ---------- */
.lab-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.lab-controls { display: flex; gap: 26px; flex-wrap: wrap; }
.ctrl label { display: block; font-size: .84rem; font-weight: 700; color: var(--ink-2); margin-bottom: 7px; }
.stepper {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 5px;
  box-shadow: var(--elev-1);
}
.stepper button {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--surface-2);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--blue);
  transition: background .15s var(--ease), color .15s var(--ease), transform .15s var(--ease);
}
.stepper button:hover:not(:disabled) { background: var(--blue); color: #fff; }
.stepper button:active:not(:disabled) { transform: scale(.94); }
.stepper button:disabled { opacity: .35; cursor: not-allowed; }
.stepper output {
  min-width: 48px;
  text-align: center;
  font-size: 1.45rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

/* ---------- laboratoriya sahnasi ---------- */
.lab-stage {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: center;
  margin: 22px 0;
}
.lab-viz { display: grid; place-items: center; }

/* laboratoriyada hosil boʻlgan kasrning katta koʻrinishi */
.lab-frac {
  display: grid;
  place-items: center;
  min-width: 96px;
  padding: 10px 22px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--elev-1);
  font-size: 2.2rem;
}

.lab-readout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}
.ro {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 12px 16px;
  box-shadow: var(--elev-1);
}
/* faqat YORLIQ (bevosita span) — kasr ham <span> lardan iborat boʻlgani uchun
   bu qoida "> span" bilan chegaralangan, aks holda kasrni kichraytirib yuboradi */
.ro > span { display: block; font-size: .78rem; color: var(--ink-2); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.ro b { font-size: 1.25rem; display: inline-flex; align-items: center; min-height: 1.9em; }

.lab-hint {
  display: flex;
  align-items: center;
  gap: .3em;
  flex-wrap: wrap;
  margin: 14px 0 0;
  min-height: 26px;
  font-weight: 600;
  color: var(--violet);
}
html[data-theme="dark"] .lab-hint { color: #b9a8ff; }

/* ============ TAQQOSLASH TAROZISI ============ */
.scale {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: center;
}
.scale-side {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px;
  text-align: center;
  box-shadow: var(--elev-1);
}
.pick { display: inline-grid; justify-items: center; gap: 5px; }
.pick-row { display: flex; align-items: center; gap: 8px; }
.pick-row button {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  font-weight: 800;
  color: var(--blue);
  transition: background .15s var(--ease), color .15s var(--ease);
}
.pick-row button:hover:not(:disabled) { background: var(--blue); color: #fff; }
.pick-row button:disabled { opacity: .35; cursor: not-allowed; }
.pick-row output { min-width: 42px; font-size: 1.5rem; font-weight: 900; font-variant-numeric: tabular-nums; }
.pick-line { width: 100%; min-width: 96px; height: 4px; background: var(--ink-2); border-radius: 3px; }
.cmp-viz { max-width: 150px; margin: 14px auto 0; }
.scale-mid span {
  display: grid;
  place-items: center;
  width: 66px; height: 66px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--amber), #ff8f3c);
  color: #fff;
  font-size: 1.9rem;
  font-weight: 900;
  box-shadow: var(--shadow);
}

/* ============ MASHINALAR (qisqartirish, qoʻshish/ayirish) ============ */
.machine {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px;
  box-shadow: var(--elev-1);
}
.machine input[type="number"] {
  width: 92px;
  padding: 10px;
  text-align: center;
  font-size: 1.3rem;
  font-weight: 800;
  border: 2px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  font-variant-numeric: tabular-nums;
}
.machine input:focus { outline: none; border-color: var(--blue); }
.machine input:invalid { border-color: var(--red); }
.machine select {
  padding: 10px 14px;
  font-size: 1.4rem;
  font-weight: 900;
  border: 2px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface-2);
}
.machine .frac-input .fi-bar { min-width: 92px; }

.machine-out { margin-top: 14px; }
.machine-out:empty { display: none; }
.mo-step {
  display: flex;
  align-items: center;
  gap: .3em;
  flex-wrap: wrap;
  background: var(--surface);
  border-left: 4px solid var(--violet);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  padding: 10px 15px;
  margin-bottom: 8px;
  font-size: .97rem;
}
.mo-step.is-warn { border-left-color: var(--amber); }
.mo-final {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .3em;
  flex-wrap: wrap;
  background: linear-gradient(135deg, var(--green), var(--blue));
  color: #fff;
  border-radius: var(--r-md);
  padding: 14px 18px;
  font-size: 1.25rem;
  font-weight: 800;
  text-align: center;
}
.mo-viz { max-width: 340px; margin: 12px auto 0; }