/* ==========================================================================
   Build Custom configurator
   ========================================================================== */

.builder {
  display: grid;
  grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

/* ----------------------------------------------------- summary rail ---- */

.summary {
  position: sticky;
  top: 92px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px 22px 24px;
  box-shadow: 0 14px 40px rgba(11, 27, 63, 0.05);
}
.summary__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.summary__head span:first-child {
  font: 600 10.5px var(--ui);
  letter-spacing: 0.18em;
  color: var(--ink-4);
}
.summary__head span:last-child { font: 600 12px var(--ui); color: var(--ink-2); }

.progress {
  height: 4px;
  border-radius: 999px;
  background: var(--line-3);
  margin-top: 12px;
  overflow: hidden;
}
.progress > i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--blue);
  border-radius: 999px;
  transition: width .3s ease;
}

.slots { display: flex; flex-direction: column; gap: 6px; margin-top: 18px; }

.slot {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 14px;
  background: var(--surface);
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}
.slot:hover { background: #F8FAFF; }
.slot.is-active { background: #F4F7FF; border-color: #C9D6F6; }

.slot__thumb {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  border-radius: 10px;
  overflow: hidden;
  background: #F4F7FF;
  border: 1px solid var(--line-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font: 600 11px var(--ui);
  color: #C3CCDB;
}
.slot.is-filled .slot__thumb { background: var(--surface); border-color: var(--line); }
.slot__thumb img { width: 100%; height: 100%; object-fit: contain; padding: 4px; box-sizing: border-box; }

.slot__text { min-width: 0; flex: 1; }
.slot__cat {
  display: block;
  font: 600 10px var(--ui);
  letter-spacing: 0.16em;
  color: var(--ink-4);
}
.slot__name {
  display: block;
  margin-top: 2px;
  font: 500 13.5px var(--ui);
  color: var(--ink-4);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.slot.is-filled .slot__name { font-weight: 600; color: var(--ink); }

.slot__mark {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font: 600 11px var(--ui);
  color: #fff;
  background: transparent;
}
.slot.is-filled .slot__mark { background: var(--blue); }

/* --------------------------------------------------------- picker ------ */

.tabs { display: flex; gap: 8px; margin-bottom: 18px; padding-bottom: 2px; }

.tab {
  font: 600 12.5px var(--ui);
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-2);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.tab:hover { border-color: var(--blue); }
.tab.is-filled { border-color: #C9D6F6; color: var(--blue); }
.tab.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }

.picker {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 26px 26px 28px;
  box-shadow: 0 14px 40px rgba(11, 27, 63, 0.05);
}
.picker h2 { font: 700 clamp(22px, 2.2vw, 30px) var(--display); letter-spacing: -0.025em; }
.picker__blurb {
  margin: 8px 0 0;
  font: 400 14.5px/1.55 var(--ui);
  color: var(--ink-2);
  max-width: 620px;
  text-wrap: pretty;
}

.optgrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.opt {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.opt:hover { border-color: #C9D6F6; }
.opt.is-on {
  border-color: var(--blue);
  background: #F6F9FF;
  box-shadow: 0 10px 26px rgba(27, 77, 228, 0.14);
}
.opt__shot {
  position: relative;
  display: block;
  width: 100%;
  height: 132px;
  background: var(--surface);
  border-radius: 12px;
  overflow: hidden;
}
.opt__shot img { width: 100%; height: 100%; object-fit: contain; padding: 8px; box-sizing: border-box; }
.opt__tick {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--blue);
  color: #fff;
  font: 600 11px var(--ui);
}
.opt.is-on .opt__tick { display: flex; }
.opt__name { display: block; font: 600 13.5px/1.3 var(--ui); margin-top: 12px; text-wrap: pretty; }
.opt__note { display: block; font: 500 11.5px/1.4 var(--ui); color: var(--ink-3); margin-top: 3px; }

.field {
  width: 100%;
  box-sizing: border-box;
  font: 400 15px/1.6 var(--ui);
  color: var(--ink);
  padding: 16px 18px;
  border: 1px solid var(--blue-border);
  border-radius: 16px;
  background: #FAFBFF;
  outline: none;
  resize: vertical;
}
.field:focus { border-color: var(--blue); }

.stepnav { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.stepnav .btn { height: 46px; }

/* ---------------------------------------------------------- modal ------ */

.modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(11, 27, 63, 0.42);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal[hidden] { display: none; }
.modal__card {
  background: var(--surface);
  border-radius: var(--r-lg);
  width: 100%;
  max-width: 560px;
  max-height: 88vh;
  overflow: auto;
  padding: 30px 32px 32px;
  box-shadow: 0 30px 80px rgba(11, 27, 63, 0.3);
}
.modal__head { display: flex; align-items: flex-start; gap: 16px; }
.modal__head h2 { margin: 8px 0 0; font: 700 26px var(--display); letter-spacing: -0.025em; }
.modal__close {
  margin-left: auto;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  cursor: pointer;
  font: 500 17px var(--ui);
  color: var(--ink-3);
  flex-shrink: 0;
}
.bom {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 6px 16px;
  background: #FAFBFF;
}
.bom dl:last-child { border-bottom: none; }

.formgrid { display: grid; gap: 14px; margin-top: 20px; }
.formgrid label { display: block; }
.formgrid span {
  display: block;
  font: 600 11.5px var(--ui);
  letter-spacing: 0.06em;
  color: var(--ink-2);
  margin-bottom: 6px;
}
.formgrid input,
.formgrid textarea {
  width: 100%;
  box-sizing: border-box;
  font: 400 14.5px/1.55 var(--ui);
  color: var(--ink);
  padding: 12px 14px;
  border: 1px solid var(--blue-border);
  border-radius: 12px;
  background: var(--surface);
  outline: none;
  resize: vertical;
}
.formgrid input:focus,
.formgrid textarea:focus { border-color: var(--blue); }

.sent { text-align: center; padding: 20px 0 8px; }
.sent__mark {
  width: 54px;
  height: 54px;
  border-radius: 999px;
  background: var(--blue-tint);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font: 700 24px var(--ui);
  margin: 0 auto;
}
.sent h2 { margin: 18px 0 0; font: 700 26px var(--display); letter-spacing: -0.025em; }
.sent p { margin: 10px 0 0; font: 400 15px/1.6 var(--ui); color: var(--ink-2); }

.finehint { font: 500 11.5px/1.5 var(--ui); color: var(--ink-3); margin-top: 10px; text-align: center; }
.linkish {
  width: 100%;
  margin-top: 10px;
  background: transparent;
  border: none;
  font: 500 12px var(--ui);
  color: var(--ink-4);
  cursor: pointer;
  padding: 4px;
}

/* ------------------------------------------------- mobile nav toggle --- */

.nav__toggle {
  display: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--blue-border);
  background: var(--surface);
  cursor: pointer;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
}
.nav__toggle i {
  display: block;
  width: 17px;
  height: 11px;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

@media (max-width: 900px) {
  .nav { position: fixed; }
  .nav__toggle { display: inline-flex; }
  .nav__actions { display: none; }
  .nav__actions.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin: 0;
    padding: 14px 16px 18px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(11, 27, 63, 0.1);
  }
  .nav__actions.is-open .btn { height: 46px; justify-content: flex-start; padding: 0 18px; }
  .nav__actions.is-open .btn--icon { width: auto; }
  .nav__actions.is-open .nav__divider { display: none; }

  .builder { grid-template-columns: 1fr; gap: 20px; }
  .summary { position: static; }
  .optgrid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
  .optgrid { grid-template-columns: 1fr; }
  .tabs { overflow-x: auto; }
  .modal__card { padding: 22px 20px 24px; }
}