.configurator {
  position: relative;
  display: grid;
  grid-template-columns:
    minmax(0, 0.92fr)
    minmax(0, 1.08fr);

  width: 100%;
  min-height: 820px;

  color: var(--primary-font-color);
}

/* Left preview panel */

.configurator-preview-panel {
  position: relative;
  z-index: 2;

  display: flex;
  flex-direction: column;
  gap: 2.5rem;

  min-width: 0;
  padding: 2.5rem;

  background: var(--background-color);

  border: 1px solid #7b7b7b;
  border-radius: 2rem 0 0 2rem;

  box-shadow:
    0 1.5rem 3.5rem rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* Outer triangle border */

.configurator-preview-panel::before {
  content: "";
  position: absolute;
  z-index: 3;

  top: 50%;
  right: -1.7rem;

  width: 0;
  height: 0;

  border-top: 1.7rem solid transparent;
  border-bottom: 1.7rem solid transparent;
  border-left: 1.7rem solid var(--background-color);

  transform: translateY(-50%);
}

/* Triangle background */

.configurator-preview-panel::after {
  content: "";
  position: absolute;
  z-index: 4;

  top: 50%;
  right: -1.57rem;

  width: 0;
  height: 0;

  border-top: 1.55rem solid transparent;
  border-bottom: 1.55rem solid transparent;
  border-left: 1.55rem solid var(--background-color);

  transform: translateY(-50%);
}

.configurator-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.75rem;
  min-height: 3rem;
}

.configurator-actions.bottom-actions {
  justify-content: flex-start;
}

.configurator-mobile-guide {
  display: none;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;

  padding: 0.9rem 1rem;

  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1.25rem;

  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.02)
  );

  -webkit-backdrop-filter: blur(14px) saturate(125%);
  backdrop-filter: blur(14px) saturate(125%);

  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.configurator-mobile-message {
  margin: 0;
  color: var(--primary-font-color);
  font-size: 0.95rem;
  line-height: 1.45;
  opacity: 0.78;
}

.configurator-drop-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;

  flex: 0 0 auto;

  width: 3rem;
  height: 3rem;

  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;

  background: rgba(255, 255, 255, 0.035);

  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);

  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    background-color 0.25s ease;
}

.configurator-drop-button:hover,
.configurator-drop-button:focus-visible {
  border-color: rgba(49, 186, 255, 0.55);
  background: rgba(49, 186, 255, 0.12);
  transform: translateY(-1px);
}

.configurator-drop-icon {
  width: 0.7rem;
  height: 0.7rem;

  border-right: 2px solid rgba(255, 255, 255, 0.85);
  border-bottom: 2px solid rgba(255, 255, 255, 0.85);

  transform: translateY(-2px) rotate(45deg);
}

.configurator-live-outputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.configurator-output {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;

  padding: 0.95rem 1rem;

  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1rem;

  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.02)
  );

  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);

  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.configurator-output-label {
  color: var(--primary-font-color);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.65;
}

.configurator-output-value {
  color: var(--primary-font-color);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.configurator-top-actions,
.configurator-bottom-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.configurator-top-actions {
  justify-content: flex-end;
  min-height: 3rem;
}

.configurator-select {
  position: relative;
  width: 100%;
}

.configurator-select select {
  display: block;

  width: 100%;
  min-height: 3.5rem;
  padding: 0.9rem 3.5rem 0.9rem 1.1rem;

  appearance: none;
  -webkit-appearance: none;

  cursor: pointer;

  color: var(--primary-font-color);
  font-family: inherit;
  font-size: var(--default-para-font-size);
  font-weight: 400;

  outline: none;

  border: 1px solid rgba(255, 255, 255, 0.14);

  border-radius: 0.75rem;

  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.07),
    rgba(255, 255, 255, 0.025)
  );

  -webkit-backdrop-filter: blur(14px) saturate(125%);

  backdrop-filter: blur(14px) saturate(125%);

  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    inset 0 -0.5rem 1.5rem rgba(0, 0, 0, 0.1);

  transition:
    border-color 0.25s ease,
    background-color 0.25s ease,
    box-shadow 0.25s ease;
}

.configurator-select select:hover {
  border-color: rgba(255, 255, 255, 0.28);

  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.095),
    rgba(255, 255, 255, 0.035)
  );
}

.configurator-select select:focus {
  border-color: #31baff;

  box-shadow:
    0 0 0 3px rgba(49, 186, 255, 0.12),
    0 0 1.25rem rgba(49, 186, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.configurator-select select:invalid {
  color: rgba(255, 255, 255, 0.48);
}

/* Native option menu */
.configurator-select select option {
  color: #f4f4f4;
  background: #17191b;
}

/* Custom arrow */
.configurator-select-arrow {
  position: absolute;
  top: 50%;
  right: 1.2rem;

  width: 0.6rem;
  height: 0.6rem;

  pointer-events: none;

  border-right: 1.5px solid rgba(255, 255, 255, 0.75);

  border-bottom: 1.5px solid rgba(255, 255, 255, 0.75);

  transform: translateY(-70%) rotate(45deg);

  transition:
    border-color 0.25s ease,
    transform 0.25s ease;
}

.configurator-select:hover .configurator-select-arrow {
  border-color: #31baff;
}

.configurator-select:focus-within .configurator-select-arrow {
  border-color: #31baff;

  transform: translateY(-35%) rotate(225deg);
}

.configurator-bottom-actions {
  justify-content: flex-start;
  margin-top: auto;
  padding-top: 0.5rem;
}

/* Roller preview */

.roller-config-preview {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  width: 100%;
  min-height: 380px;

  overflow: hidden;

  border: 1px solid rgba(123, 123, 123, 0.5);
  border-radius: 1.25rem;

  background: radial-gradient(
    circle at 50% 45%,
    rgba(255, 255, 255, 0.07),
    rgba(255, 255, 255, 0.015) 55%,
    rgba(0, 0, 0, 0.12) 100%
  );

  box-shadow:
    inset 0 1rem 3rem rgba(0, 0, 0, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.canvas-container {
  width: 100% !important;
  height: 100% !important;
}

canvas {
  width: 100% !important;
  height: 100% !important;
  aspect-ratio: unset;
}

.roller-config-details {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;

  max-width: 650px;
}

.roller-config-title {
  margin: 0;

  color: var(--primary-font-color);
  font-size: clamp(1.6rem, 2vw, 2.2rem);
  font-weight: 500;
}

.roller-config-description {
  margin: 0;

  color: var(--primary-font-color);
  font-size: var(--default-para-font-size);
  line-height: 1.65;
  opacity: 0.72;
}

/* Buttons */

.configurator-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;

  min-height: 3rem;
  padding: 0.75rem 1.5rem;

  cursor: pointer;

  color: var(--primary-font-color);
  font-family: inherit;
  font-size: 0.9rem;
  text-decoration: none;

  border: 1px solid rgba(123, 123, 123, 0.8);
  border-radius: 999px;

  background: rgba(255, 255, 255, 0.035);

  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);

  transition:
    background-color 0.25s ease,
    border-color 0.25s ease,
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.configurator-button:hover,
.configurator-button:focus-visible {
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.09);

  transform: translateY(-2px);
}

.configurator-button:active {
  transform: translateY(0);
}

.configurator-button-primary {
  color: #06131c;
  border-color: #31baff;
  background: #31baff;

  box-shadow: 0 0.5rem 1.5rem rgba(49, 186, 255, 0.25);
}

.configurator-button-primary:hover,
.configurator-button-primary:focus-visible {
  color: #ffffff;
  border-color: #79d7ff;
  background: #079fe9;

  box-shadow: 0 0.75rem 2rem rgba(49, 186, 255, 0.35);
}

.configurator-button.primary {
  color: #06131c;
  border-color: #31baff;
  background: #31baff;

  box-shadow: 0 0.5rem 1.5rem rgba(49, 186, 255, 0.25);
}

.configurator-button.primary:hover,
.configurator-button.primary:focus-visible {
  color: #ffffff;
  border-color: #79d7ff;
  background: #079fe9;

  box-shadow: 0 0.75rem 2rem rgba(49, 186, 255, 0.35);
}

/* Right properties panel */

.configurator-control-panel {
  position: relative;
  z-index: 1;
  min-width: 0;
  padding: 3.5rem 3.5rem 3.5rem 3.5rem;
  border: 1px solid #7b7b7b;
  border-left: 0;
  border-radius: 0 2rem 2rem 0;
  background: rgba(123, 123, 123, 0.5);
  box-shadow:
    inset 2rem 0 3.5rem rgba(0, 0, 0, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    inset 0 -1.5rem 3rem rgba(0, 0, 0, 0.1);
  scroll-margin-top: 8rem;
}

.configurator-form {
  display: flex;
  flex-direction: column;
  gap: 0;

  width: 100%;
  height: 100%;
}

.configurator-heading {
  margin: 0 0 2.5rem;

  color: var(--primary-font-color);
  font-size: clamp(1.5rem, 2vw, 2.1rem);
  font-weight: 500;
}

.system-properties-grid {
  display: grid;
  grid-template-columns:
    minmax(190px, 0.75fr)
    minmax(280px, 1.25fr);

  align-items: start;
  gap: 3.5rem;

  width: 100%;
}

.dimension-inputs,
.additional-properties {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.additional-properties {
  width: 100%;
  max-width: 520px;
}

.configurator-fields-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;

  width: 100%;
}

.locked-choice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  width: 100%;
}

.locked-choice-grid .locked-configurator-field {
  min-height: 100%;
}

.locked-choice-grid .locked-selection {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 104px;
  padding: 1rem 1.1rem;

  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 1rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.025));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.07),
    0 18px 38px rgba(0, 0, 0, 0.12);

  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease,
    background-color 0.25s ease;
}

.locked-choice-grid .locked-selection:hover {
  transform: translateY(-2px);
  border-color: rgba(49, 186, 255, 0.4);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 24px 48px rgba(0, 0, 0, 0.18);
}

.locked-choice-grid .lock-icon {
  flex: 0 0 auto;
}

.locked-choice-grid .locked-selection > div {
  min-width: 0;
}

.locked-choice-grid .locked-selection strong {
  display: block;
}

.locked-choice-grid .locked-selection small {
  display: block;
}

.locked-choice-grid .locked-selection a {
  display: inline-flex;
  margin-top: 0.4rem;
}

.configurator-field {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-width: 0;
}

#track-spacing-field[hidden] {
  display: none !important;
}

.configurator-field label {
  color: var(--primary-font-color);
  font-size: 0.9rem;
  font-weight: 500;
}

.input-with-unit {
  position: relative;
  width: 100%;
}

.configurator-field input {
  width: 100%;
  min-height: 3.5rem;
  padding: 0.9rem 4rem 0.9rem 1rem;

  color: var(--primary-font-color);
  font-family: inherit;
  font-size: var(--default-para-font-size);

  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 0.75rem;
  outline: none;

  background: rgba(0, 0, 0, 0.16);

  box-shadow: inset 0 0.5rem 1.25rem rgba(0, 0, 0, 0.12);

  transition:
    border-color 0.25s ease,
    background-color 0.25s ease,
    box-shadow 0.25s ease;
}

.configurator-field input::placeholder {
  color: rgba(255, 255, 255, 0.42);
}

.configurator-field input:hover {
  border-color: rgba(255, 255, 255, 0.3);
}

.configurator-field input:focus {
  border-color: #31baff;
  background: rgba(0, 0, 0, 0.22);

  box-shadow:
    0 0 0 3px rgba(49, 186, 255, 0.12),
    inset 0 0.5rem 1.25rem rgba(0, 0, 0, 0.15);
}

.input-with-unit > span {
  position: absolute;
  top: 50%;
  right: 1rem;

  color: rgba(255, 255, 255, 0.55);
  font-size: 0.8rem;

  pointer-events: none;
  transform: translateY(-50%);
}

.frame-stage {
  position: relative;

  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  width: 100%;
  min-height: 500px;
  padding: clamp(1.75rem, 3vw, 2.5rem);

  overflow: hidden;

  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1.25rem;

  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.08),
    rgba(0, 0, 0, 0.12) 72%
  );

  box-shadow: inset 0 1.5rem 3rem rgba(0, 0, 0, 0.18);
}

.cross-section-preview {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(340px, calc(100% - 3rem));
  height: 250px;
  background-image: url("../images/assets/cross-section.webp");
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  transform: translate(-50%, -50%);
}

.frame-width-label,
.frame-height-label {
  position: absolute;

  color: rgba(255, 255, 255, 0.65);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
}

.frame-width-label strong,
.frame-height-label strong {
  color: var(--primary-font-color);
  font-weight: 500;
}

.frame-width-label {
  left: 50%;
  bottom: 1rem;

  transform: translateX(-50%);
}

.frame-height-label {
  top: 50%;
  right: 1rem;

  writing-mode: vertical-rl;

  transform: translateY(-50%) rotate(180deg);
}
.configurator-separator {
  width: 100%;
  height: 1px;

  margin-block: 3rem;

  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.28) 15%,
    rgba(255, 255, 255, 0.28) 85%,
    transparent
  );
}

/* Responsive layout */

@media (max-width: 1200px) {
  .configurator-control-panel {
    padding: 3rem 2.5rem 3rem 4.5rem;
  }

  .system-properties-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .frame-stage {
    padding: 2rem;
    order: -1;
    min-height: 360px;
  }
  .roller-config-preview {
    min-height: 500px;
  }
}

@media (max-width: 991px) {
  .configurator {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .configurator-preview-panel {
    padding: 2rem;
    border-radius: 2rem 2rem 0 0;
  }

  .configurator-mobile-guide {
    display: flex;
  }

  .configurator-preview-panel::before,
  .configurator-preview-panel::after {
    display: none;
  }

  .configurator-control-panel {
    padding: 2.5rem;

    border-top: 0;
    border-left: 1px solid #7b7b7b;
    border-radius: 0 0 2rem 2rem;

    box-shadow:
      inset 0 1.5rem 3rem rgba(0, 0, 0, 0.15),
      inset 0 1px 0 rgba(255, 255, 255, 0.08),
      inset 0 -1.5rem 3rem rgba(0, 0, 0, 0.1);
  }

  .system-properties-grid {
    gap: 2.5rem;
  }
  .configurator-actions.bottom-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 767px) {
  .configurator-preview-panel,
  .configurator-control-panel {
    padding: 1.5rem;
  }

  .configurator-preview-panel {
    gap: 1rem;
  }

  .configurator-heading {
    margin-bottom: 2rem;
  }

  .system-properties-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .configurator-button {
    padding: 0.5rem 1rem;
  }

  .frame-stage {
    min-height: 320px;
    padding: 1.75rem;
  }

  .configurator-separator {
    margin-block: 2.25rem;
  }

  .additional-properties {
    max-width: none;
  }

  .configurator-bottom-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .configurator-bottom-actions .configurator-button {
    width: 100%;
  }
  .roller-config-preview {
    min-height: auto;
  }
}

@media (max-width: 479px) {
  .configurator-preview-panel,
  .configurator-control-panel {
    padding: 1.5rem 1.25rem;
  }

  .configurator-live-outputs {
    grid-template-columns: 1fr;
  }

  .configurator-output-value {
    font-size: 1.05rem;
  }

  .configurator-top-actions {
    justify-content: stretch;
  }

  .configurator-top-actions .configurator-button {
    flex: 1;
  }

  .frame-stage {
    min-height: 280px;
    padding: 1.25rem;
  }

  .cross-section-preview {
    width: min(260px, calc(100% - 1.5rem));
    height: 200px;
  }
}