.izr-calculator {
  --izr-ink: #10223f;
  --izr-muted: #536174;
  --izr-blue: #155eef;
  --izr-blue-dark: #0d47bd;
  --izr-blue-soft: #eef4ff;
  --izr-line: #d9e1ec;
  --izr-surface: #ffffff;
  --izr-warm: #fff7e8;
  --izr-danger: #b42318;
  color: var(--izr-ink);
  background: var(--izr-surface);
  border: 1px solid var(--izr-line);
  border-radius: 24px;
  box-shadow: 0 18px 55px rgba(16, 34, 63, 0.1);
  font-family: inherit;
  margin: 2rem auto;
  max-width: 960px;
  overflow: hidden;
}

.izr-calculator *,
.izr-calculator *::before,
.izr-calculator *::after {
  box-sizing: border-box;
}

.izr-calculator__header,
.izr-form,
.izr-results,
.izr-calculator__footer {
  padding: clamp(1.25rem, 3.5vw, 2.5rem);
}

.izr-calculator__header {
  background: linear-gradient(135deg, #0f3f99 0%, #155eef 58%, #55a7ff 100%);
  color: #fff;
}

.izr-calculator__header h2,
.izr-results h3,
.izr-results h4 {
  color: inherit;
  line-height: 1.15;
  margin: 0.25rem 0 0.75rem;
}

.izr-calculator__header h2 {
  font-size: clamp(1.65rem, 4vw, 2.5rem);
}

.izr-calculator p {
  line-height: 1.6;
}

.izr-eyebrow {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin: 0;
  text-transform: uppercase;
}

.izr-form {
  display: grid;
  gap: 1rem;
}

.izr-step {
  border: 1px solid var(--izr-line);
  border-radius: 18px;
  margin: 0;
  padding: clamp(1rem, 3vw, 1.5rem);
}

.izr-step legend {
  color: var(--izr-ink);
  font-size: 1.08rem;
  font-weight: 800;
  padding: 0 0.5rem;
}

.izr-step legend span {
  align-items: center;
  background: var(--izr-blue);
  border-radius: 999px;
  color: #fff;
  display: inline-flex;
  height: 1.8rem;
  justify-content: center;
  margin-right: 0.35rem;
  width: 1.8rem;
}

.izr-help,
.izr-calculator__footer,
.izr-result-note {
  color: var(--izr-muted);
  font-size: 0.9rem;
}

.izr-choice-row {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 1rem 0;
}

.izr-choice,
.izr-check {
  cursor: pointer;
  display: flex;
  gap: 0.65rem;
}

.izr-choice {
  position: relative;
}

.izr-choice input {
  height: 1px;
  opacity: 0;
  position: absolute;
  width: 1px;
}

.izr-choice span {
  background: #fff;
  border: 1px solid var(--izr-line);
  border-radius: 12px;
  display: block;
  font-weight: 700;
  padding: 0.85rem 1rem;
  text-align: center;
  width: 100%;
}

.izr-choice input:checked + span {
  background: var(--izr-blue-soft);
  border-color: var(--izr-blue);
  box-shadow: inset 0 0 0 1px var(--izr-blue);
  color: var(--izr-blue-dark);
}

.izr-choice input:focus-visible + span,
.izr-calculator input:focus-visible,
.izr-calculator select:focus-visible,
.izr-submit:focus-visible,
.izr-step summary:focus-visible {
  outline: 3px solid rgba(21, 94, 239, 0.32);
  outline-offset: 2px;
}

.izr-fields {
  display: grid;
  gap: 1rem;
}

.izr-fields--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.izr-fields__full {
  grid-column: 1 / -1;
}

.izr-field {
  display: grid;
  font-size: 0.92rem;
  font-weight: 700;
  gap: 0.4rem;
}

.izr-field select,
.izr-input-wrap {
  background: #fff;
  border: 1px solid #b8c4d4;
  border-radius: 10px;
  min-height: 48px;
}

.izr-field select {
  color: var(--izr-ink);
  font: inherit;
  padding: 0 0.8rem;
  width: 100%;
}

.izr-input-wrap {
  align-items: center;
  display: flex;
  overflow: hidden;
}

.izr-input-wrap input {
  background: transparent;
  border: 0;
  color: var(--izr-ink);
  flex: 1;
  font: inherit;
  min-width: 0;
  outline: 0;
  padding: 0 0.8rem;
}

.izr-input-wrap small {
  background: #f4f7fb;
  align-self: stretch;
  align-items: center;
  color: var(--izr-muted);
  display: flex;
  font-weight: 800;
  padding: 0 0.75rem;
}

.izr-field-title {
  font-weight: 800;
  margin: 1.25rem 0 0.6rem;
}

.izr-check-grid {
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.izr-check {
  align-items: flex-start;
  background: #f8fafc;
  border-radius: 10px;
  padding: 0.75rem;
}

.izr-check input {
  accent-color: var(--izr-blue);
  height: 1.15rem;
  margin-top: 0.12rem;
  width: 1.15rem;
}

.izr-material-panel {
  background: var(--izr-blue-soft);
  border-radius: 14px;
  margin-top: 1rem;
  padding: 1rem;
}

.izr-step--optional summary {
  cursor: pointer;
  font-weight: 800;
}

.izr-step--optional[open] summary {
  margin-bottom: 1rem;
}

.izr-measurement-preview {
  background: var(--izr-warm);
  border-radius: 10px;
  color: var(--izr-ink);
  font-weight: 700;
  margin: 0;
  padding: 0.75rem;
}

.izr-submit {
  background: var(--izr-blue);
  border: 0;
  border-radius: 12px;
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 800;
  justify-self: stretch;
  min-height: 54px;
  padding: 0.85rem 1.4rem;
}

.izr-submit:hover {
  background: var(--izr-blue-dark);
}

.izr-notice {
  border-radius: 12px;
  margin: 1rem clamp(1.25rem, 3.5vw, 2.5rem) 0;
  padding: 1rem;
}

.izr-form > .izr-notice {
  margin: 0;
}

.izr-notice--error {
  background: #fff0ee;
  border: 1px solid #f4b8b2;
  color: var(--izr-danger);
}

.izr-notice ul {
  margin-bottom: 0;
}

.izr-results {
  background: #f6f9ff;
  border-top: 1px solid var(--izr-line);
  scroll-margin-top: 2rem;
}

.izr-results__heading:focus {
  outline: 0;
}

.izr-scenarios {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 1.25rem 0;
}

.izr-scenario {
  background: #fff;
  border: 1px solid var(--izr-line);
  border-radius: 14px;
  display: grid;
  gap: 0.25rem;
  padding: 1rem;
}

.izr-scenario--featured {
  border-color: var(--izr-blue);
  box-shadow: 0 8px 28px rgba(21, 94, 239, 0.14);
}

.izr-scenario span,
.izr-scenario small {
  color: var(--izr-muted);
}

.izr-scenario strong {
  color: var(--izr-ink);
  font-size: clamp(1.25rem, 3vw, 1.8rem);
}

.izr-breakdown,
.izr-assumptions {
  background: #fff;
  border: 1px solid var(--izr-line);
  border-radius: 14px;
  margin-top: 1rem;
  padding: 1rem;
}

.izr-breakdown dl {
  margin: 0;
}

.izr-breakdown dl > div {
  border-top: 1px solid #edf1f6;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  padding: 0.65rem 0;
}

.izr-breakdown dd {
  font-weight: 800;
  margin: 0;
  text-align: right;
}

.izr-assumptions ul {
  margin-bottom: 0;
}

.izr-calculator__footer {
  border-top: 1px solid var(--izr-line);
}

.izr-calculator__footer p:last-child {
  margin-bottom: 0;
}

.izr-calculator__footer a {
  color: var(--izr-blue-dark);
  font-weight: 700;
}

[data-izr-panel][hidden],
[data-izr-material-panel][hidden],
[data-izr-ceiling-material-panel][hidden],
.izr-results[hidden] {
  display: none !important;
}

@media (max-width: 680px) {
  .izr-choice-row,
  .izr-fields--2,
  .izr-check-grid,
  .izr-scenarios {
    grid-template-columns: 1fr;
  }

  .izr-scenario {
    grid-template-columns: 1fr auto;
  }

  .izr-scenario strong {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .izr-scenario small {
    grid-column: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .izr-calculator * {
    scroll-behavior: auto !important;
  }
}