:root {
  --engineering-ink: #172033;
  --engineering-muted: #5f6b7a;
  --engineering-line: #d7dee8;
  --engineering-soft: #f5f7fa;
  --engineering-accent: #0f647b;
  --engineering-warm: #a74914;
}

.engineering-page {
  min-height: 100vh;
  max-width: 100%;
  overflow-x: hidden;
  color: var(--engineering-ink);
  background:
    linear-gradient(90deg, rgba(15, 100, 123, .035) 1px, transparent 1px),
    linear-gradient(rgba(15, 100, 123, .035) 1px, transparent 1px),
    #f2f4f7;
  background-size: 32px 32px;
}

.engineering-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 249, 251, .94);
  backdrop-filter: blur(12px);
}

.engineering-version {
  color: var(--engineering-muted);
  font: 600 12px/1.2 var(--font-mono, monospace);
}

.engineering-main {
  width: min(1500px, calc(100% - 40px));
  min-width: 0;
  margin: 0 auto;
  padding: 44px 0 72px;
}

.engineering-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, .6fr);
  gap: 40px;
  align-items: end;
  padding: 36px 0 32px;
  border-bottom: 1px solid var(--engineering-line);
}

.engineering-kicker,
.engineering-panel > header p {
  margin: 0 0 10px;
  color: var(--engineering-accent);
  font: 700 11px/1.3 var(--font-mono, monospace);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.engineering-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 4vw, 62px);
  line-height: 1.05;
}

.engineering-hero p {
  max-width: 860px;
  margin: 0;
  color: var(--engineering-muted);
  font-size: 16px;
  line-height: 1.8;
}

.engineering-hero ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.engineering-hero li {
  padding: 10px 14px;
  border-left: 3px solid var(--engineering-accent);
  background: rgba(255, 255, 255, .7);
  font-size: 13px;
}

.engineering-boundary {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 18px;
  margin: 24px 0;
  padding: 18px 22px;
  border: 1px solid #e7b48f;
  background: #fff8f1;
}

.engineering-boundary strong {
  color: var(--engineering-warm);
}

.engineering-boundary p {
  margin: 0;
  color: #6f4b35;
  line-height: 1.7;
}

.engineering-layout {
  display: grid;
  grid-template-columns: minmax(520px, .9fr) minmax(560px, 1.1fr);
  gap: 24px;
  align-items: start;
}

.engineering-hero > *,
.engineering-layout > *,
#engineering-fields,
#engineering-fields fieldset,
.engineering-field {
  min-width: 0;
  max-width: 100%;
}

.engineering-hero p,
.engineering-boundary p,
.engineering-field small {
  overflow-wrap: anywhere;
}

.engineering-panel {
  min-width: 0;
  border: 1px solid var(--engineering-line);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 18px 48px rgba(23, 32, 51, .07);
}

.engineering-panel > header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  padding: 22px 24px;
  border-bottom: 1px solid var(--engineering-line);
}

.engineering-panel > header h2 {
  margin: 0;
  font-size: 22px;
}

.engineering-panel > header > span {
  color: var(--engineering-muted);
  font-size: 12px;
}

#engineering-form,
#engineering-result-content {
  padding: 24px;
}

#engineering-fields {
  display: grid;
  gap: 22px;
}

#engineering-fields fieldset {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 18px;
  border: 1px solid var(--engineering-line);
  background: var(--engineering-soft);
}

#engineering-fields legend {
  padding: 0 8px;
  color: var(--engineering-accent);
  font-weight: 750;
}

.engineering-field {
  display: grid;
  gap: 7px;
  align-content: start;
}

.engineering-field label {
  font-size: 13px;
  font-weight: 700;
}

.engineering-field input,
.engineering-field select,
.engineering-field textarea {
  width: 100%;
  max-width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid #b9c4d1;
  border-radius: 3px;
  color: var(--engineering-ink);
  background: #fff;
  font: 600 14px/1.3 var(--font-mono, monospace);
}

.engineering-field input:focus,
.engineering-field select:focus,
.engineering-field textarea:focus {
  outline: 3px solid #0f647b;
  outline-offset: 2px;
  border-color: var(--engineering-accent);
}

.engineering-field input[aria-invalid="true"],
.engineering-field select[aria-invalid="true"],
.engineering-field textarea[aria-invalid="true"] {
  border-color: #c73030;
}

.engineering-field textarea {
  min-height: 180px;
  resize: vertical;
  white-space: pre;
}

.engineering-field--boolean {
  grid-template-columns: 1fr auto;
}

.engineering-field--boolean input {
  width: 22px;
  min-height: 22px;
}

.engineering-field--boolean small {
  grid-column: 1 / -1;
}

.engineering-field small {
  color: var(--engineering-muted);
  line-height: 1.5;
}

.engineering-field-error,
.engineering-form-errors {
  color: #a31818 !important;
  font-weight: 700;
}

.engineering-required {
  color: #a31818;
  font-size: 10px;
}

.engineering-form-errors {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 3px solid #c73030;
  background: #fff0f0;
}

.engineering-form-errors:focus {
  outline: 3px solid #0f647b;
  outline-offset: 3px;
}

.engineering-noscript {
  display: grid;
  margin: 22px;
  padding: 16px 18px;
  border-left: 4px solid #b45309;
  color: #6f4b35;
  background: #fff8ed;
  gap: 6px;
}

.engineering-noscript a {
  color: var(--engineering-accent);
  font-weight: 750;
}

.engineering-form-actions,
.engineering-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 22px;
}

.engineering-text-button {
  padding: 9px 4px;
  border: 0;
  color: var(--engineering-accent);
  background: transparent;
  font-weight: 700;
  cursor: pointer;
}

.engineering-sample-note {
  margin: 12px 0 0;
  color: var(--engineering-muted);
  font-size: 12px;
}

.engineering-placeholder {
  display: grid;
  min-height: 260px;
  place-items: center;
  padding: 40px;
  color: var(--engineering-muted);
  text-align: center;
}

.engineering-placeholder--error {
  color: #a31818;
}

.engineering-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 24px;
  background: var(--engineering-line);
}

.engineering-meta > div {
  padding: 12px 14px;
  background: var(--engineering-soft);
}

.engineering-meta dt {
  color: var(--engineering-muted);
  font-size: 11px;
}

.engineering-meta dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
  font: 650 12px/1.4 var(--font-mono, monospace);
}

#engineering-result-content section {
  margin-top: 28px;
}

#engineering-result-content h3 {
  margin: 0 0 12px;
  font-size: 16px;
}

.engineering-warning {
  margin: 9px 0;
  padding: 13px 15px;
  border-left: 4px solid #b36a1d;
  background: #fff8ed;
}

.engineering-warning--high,
.engineering-warning--blocking {
  border-left-color: #c73030;
  background: #fff0f0;
}

.engineering-warning p {
  margin: 6px 0;
  line-height: 1.6;
}

.engineering-warning small {
  color: var(--engineering-muted);
}

.engineering-table-wrap {
  overflow-x: auto;
}

.engineering-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.engineering-table-wrap th,
.engineering-table-wrap td {
  padding: 10px 9px;
  border: 1px solid var(--engineering-line);
  text-align: left;
  vertical-align: top;
}

.engineering-table-wrap th {
  background: var(--engineering-soft);
}

.engineering-table-wrap td:nth-child(2),
.engineering-table-wrap td:nth-child(3),
.engineering-table-wrap td:nth-child(5) {
  font-family: var(--font-mono, monospace);
}

.engineering-reason-row td {
  color: #93410e;
  background: #fff8ed;
}

.engineering-step-list,
.engineering-audit-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.engineering-step-list li {
  display: grid;
  gap: 8px;
  padding: 13px 15px;
  border: 1px solid var(--engineering-line);
  background: var(--engineering-soft);
}

.engineering-step-list code {
  overflow-wrap: anywhere;
  color: var(--engineering-accent);
  font-size: 13px;
}

.engineering-step-list small,
.engineering-step-list span {
  color: var(--engineering-muted);
}

.engineering-audit-list li {
  display: grid;
  gap: 4px;
  padding: 10px 0;
  border-bottom: 1px solid var(--engineering-line);
}

.engineering-audit-list span {
  color: var(--engineering-muted);
  line-height: 1.6;
}

[hidden] {
  display: none !important;
}

.engineering-footer {
  display: flex;
  padding: 27px max(20px, calc((100vw - 1460px) / 2));
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  color: #91a4b7;
  text-align: left;
  background: #102a43;
}

.engineering-footer div {
  display: flex;
  align-items: center;
  gap: 18px;
}

.engineering-footer a {
  color: #fff;
  font-weight: 750;
  text-decoration: none;
}

.engineering-footer span {
  font: 650 9px/1.4 var(--font-mono, monospace);
}

.engineering-footer p {
  margin: 0;
  font-size: 10.5px;
}

@media (max-width: 1120px) {
  .engineering-layout {
    grid-template-columns: 1fr;
  }

  .engineering-result-panel {
    position: static;
  }
}

@media (max-width: 900px) {
  .engineering-header .site-nav {
    display: none;
  }

  .engineering-version {
    max-width: 180px;
    overflow: hidden;
    font-size: 10px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (max-width: 720px) {
  .engineering-main {
    width: min(1500px, calc(100% - 24px));
    padding-top: 20px;
  }

  .engineering-header {
    padding: 12px;
  }

  .engineering-header .brand small {
    display: none;
  }

  .engineering-version {
    max-width: 96px;
  }

  .engineering-hero,
  .engineering-boundary {
    grid-template-columns: 1fr;
  }

  .engineering-hero {
    gap: 24px;
  }

  #engineering-fields fieldset {
    grid-template-columns: 1fr;
    padding: 14px;
  }

  .engineering-panel > header {
    align-items: start;
    flex-direction: column;
  }

  #engineering-form,
  #engineering-result-content {
    padding: 16px;
  }

  .engineering-meta {
    grid-template-columns: 1fr;
  }

  .engineering-footer {
    padding: 24px 16px;
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .engineering-footer div {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}