/* ============================================================
   Configurator Innova-Tec
   ============================================================ */

.config-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 32px;
  align-items: start;
}

@media (max-width: 1020px) {
  .config-layout { grid-template-columns: 1fr; }
}

.config-step {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 34px);
  margin-bottom: 24px;
}

.config-step__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.config-step__num {
  flex: none;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: var(--yellow);
  color: var(--black);
  font-weight: 700;
  display: grid;
  place-items: center;
  font-family: var(--mono);
}

.config-step__head h2 { font-size: 1.3rem; }
.config-step__head p { font-size: .88rem; color: var(--text-soft); }

/* product radio cards */

.radio-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

@media (max-width: 720px) { .radio-cards { grid-template-columns: 1fr; } }

.radio-card { position: relative; cursor: pointer; }

.radio-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.radio-card__box {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
  background: var(--cream);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.radio-card:hover .radio-card__box { transform: translateY(-3px); box-shadow: var(--shadow-1); }

.radio-card input:checked + .radio-card__box {
  border-color: var(--black);
  box-shadow: 0 0 0 4px rgba(253, 184, 19, .35), var(--shadow-1);
}

.radio-card input:focus-visible + .radio-card__box {
  outline: 3px solid var(--yellow);
  outline-offset: 2px;
}

.radio-card__img { aspect-ratio: 16/9; object-fit: cover; width: 100%; }

.radio-card__label { padding: 14px 16px; }

.radio-card__label b { display: block; font-size: 1.05rem; }
.radio-card__label span { font-size: .82rem; color: var(--text-soft); }

.radio-card__check {
  position: absolute;
  top: 10px; right: 10px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--black);
  display: grid;
  place-items: center;
  opacity: 0;
  transform: scale(.6);
  transition: opacity .18s ease, transform .18s ease;
}

.radio-card input:checked ~ .radio-card__check { opacity: 1; transform: none; }

.radio-card__check svg { width: 15px; height: 15px; }

/* parameter widgets */

.param-block { display: grid; gap: 22px; }

.range-row { display: grid; gap: 12px; }

.range-row__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.range-row__top label { font-weight: 600; }

.range-val {
  display: flex;
  align-items: center;
  gap: 8px;
}

.range-val input {
  width: 110px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  font: inherit;
  font-weight: 700;
  font-size: 1.05rem;
  text-align: right;
}

.range-val input:focus { outline: none; border-color: var(--yellow); box-shadow: 0 0 0 4px rgba(253,184,19,.22); }

.range-val .unit { font-weight: 600; color: var(--text-soft); }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--yellow) 0%, var(--yellow) var(--fill, 30%), var(--cream-2) var(--fill, 30%));
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--black);
  border: 3px solid var(--yellow);
  cursor: grab;
  box-shadow: 0 2px 8px rgba(14,13,11,.3);
  transition: transform .12s ease;
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); }

input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--black);
  border: 3px solid var(--yellow);
  cursor: grab;
}

.range-marks {
  display: flex;
  justify-content: space-between;
  font-size: .78rem;
  color: var(--text-soft);
  font-family: var(--mono);
}

/* model radio pills (HelioWatt) */

.pill-radios { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

@media (max-width: 640px) { .pill-radios { grid-template-columns: 1fr; } }

.pill-radio { position: relative; cursor: pointer; }

.pill-radio input { position: absolute; opacity: 0; pointer-events: none; }

.pill-radio__box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 100%;
  border: 2px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
  text-align: center;
  transition: border-color .15s ease, background .15s ease;
}

.pill-radio__box b { display: block; font-size: 1.15rem; line-height: 1.25; }
.pill-radio__box span { font-size: .84rem; color: var(--text-soft); }

.pill-radio input:checked + .pill-radio__box {
  border-color: var(--black);
  background: var(--yellow-dim);
}

.pill-radio input:focus-visible + .pill-radio__box { outline: 3px solid var(--yellow); outline-offset: 2px; }

/* option toggle rows */

.opt-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border: 1.5px solid var(--line);
  border-radius: 16px;
  transition: border-color .15s ease, background .15s ease;
}

.opt-row:has(input:checked) { border-color: rgba(253, 184, 19, .8); background: var(--yellow-dim); }

.opt-row--disabled { opacity: .45; pointer-events: none; }

.opt-row__text { flex: 1; }
.opt-row__text b { display: block; font-size: .98rem; }
.opt-row__text span { font-size: .84rem; color: var(--text-soft); }

.opt-row__price { font-weight: 700; white-space: nowrap; font-size: .95rem; }

/* switch */

.switch {
  position: relative;
  width: 52px; height: 30px;
  flex: none;
}

.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }

.switch__track {
  position: absolute; inset: 0;
  background: var(--cream-2);
  border: 1.5px solid var(--line);
  border-radius: 99px;
  transition: background .18s ease, border-color .18s ease;
}

.switch__track::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 21px; height: 21px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 1px 4px rgba(14,13,11,.25);
  transition: transform .18s ease;
}

.switch input:checked + .switch__track { background: var(--yellow); border-color: var(--yellow); }
.switch input:checked + .switch__track::after { transform: translateX(22px); background: var(--black); }
.switch input:focus-visible + .switch__track { outline: 3px solid rgba(253,184,19,.5); outline-offset: 2px; }

/* stepper */

.stepper {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  flex: none;
}

.stepper button {
  width: 42px; height: 42px;
  border: none;
  background: var(--cream-2);
  font-size: 1.2rem;
  font-weight: 700;
  transition: background .12s ease;
}

.stepper button:hover { background: var(--yellow); }

.stepper input {
  width: 56px;
  height: 42px;
  border: none;
  text-align: center;
  font: inherit;
  font-weight: 700;
  -moz-appearance: textfield;
  appearance: textfield;
}

.stepper input::-webkit-outer-spin-button, .stepper input::-webkit-inner-spin-button { -webkit-appearance: none; }
.stepper input:focus { outline: none; background: var(--yellow-dim); }

/* summary aside */

.config-aside { position: sticky; top: calc(var(--header-h) + 20px); }

@media (max-width: 1020px) { .config-aside { position: static; } }

.summary-card {
  background: var(--black);
  color: var(--text-inv);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-2);
}

.summary-card__head {
  padding: 22px 26px 18px;
  border-bottom: 1px solid var(--line-inv);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.summary-card__head h2 { font-size: 1.15rem; }

.summary-card__product {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--yellow);
  background: rgba(253,184,19,.14);
  padding: 5px 12px;
  border-radius: 99px;
  white-space: nowrap;
}

.summary-lines { padding: 10px 26px; max-height: 340px; overflow-y: auto; }

.summary-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line-inv);
  font-size: .92rem;
}

.summary-line:last-child { border-bottom: none; }

.summary-line__name { color: var(--text-inv-soft); }
.summary-line__name small { display: block; font-size: .78rem; opacity: .75; }
.summary-line__val { font-weight: 600; white-space: nowrap; font-variant-numeric: tabular-nums; }

.summary-total {
  padding: 20px 26px;
  background: var(--ink-2);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.summary-total span { color: var(--text-inv-soft); font-size: .92rem; }

.summary-total b {
  font-size: clamp(1.6rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.summary-total b em { font-style: normal; color: var(--yellow); }

.summary-actions { padding: 22px 26px 26px; display: grid; gap: 12px; }

.summary-actions .btn { width: 100%; }

.summary-note {
  font-size: .78rem;
  color: var(--text-inv-soft);
  line-height: 1.5;
}

.summary-note a { color: var(--yellow); }

/* form grid inside step 3 */

.client-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

@media (max-width: 640px) { .client-grid { grid-template-columns: 1fr; } }

/* success toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 120%);
  background: var(--black);
  color: var(--white);
  padding: 15px 26px;
  border-radius: 99px;
  font-weight: 600;
  box-shadow: var(--shadow-2);
  transition: transform .3s cubic-bezier(.2,.7,.3,1.1);
  z-index: 300;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.is-visible { transform: translate(-50%, 0); }

.toast svg { width: 20px; height: 20px; color: var(--yellow); }

/* validation */

.field input:user-invalid { border-color: #D6453A; }

.field-error { color: #D6453A; font-size: .82rem; display: none; }