:root {
  --ink: #152238;
  --muted: #637188;
  --line: #dbe3ee;
  --surface: #ffffff;
  --surface-soft: #f3f6fa;
  --navy: #0b1930;
  --blue: #3156d8;
  --cyan: #32d5c8;
  --green: #14866d;
  --red: #b42318;
  --radius: 1.25rem;
}

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

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 8%, rgba(50, 213, 200, 0.16), transparent 25%),
    var(--surface-soft);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(calc(100% - 2rem), 75rem);
  margin-inline: auto;
  padding-block: clamp(2.5rem, 7vw, 5.5rem);
}

.intro {
  max-width: 52rem;
  margin-bottom: 2.5rem;
}

.eyebrow,
.section-label {
  margin: 0 0 0.65rem;
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.intro h1 {
  margin: 0;
  font-size: clamp(2.7rem, 8vw, 5.5rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.intro > p:not(.eyebrow) {
  max-width: 46rem;
  margin: 1.35rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.intro a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--blue);
  font-weight: 750;
}

.lab-grid {
  display: grid;
  gap: 1rem;
}

.panel {
  min-width: 0;
  padding: clamp(1.25rem, 4vw, 2.25rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1.2rem 3rem rgba(21, 34, 56, 0.07);
}

.panel h2 {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: -0.035em;
}

form {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.field {
  display: grid;
  align-content: start;
  gap: 0.4rem;
}

.field > label,
.field legend {
  font-size: 0.82rem;
  font-weight: 780;
}

.field small {
  color: var(--muted);
  font-size: 0.72rem;
}

.field input:not([type="checkbox"]) {
  width: 100%;
  min-height: 3rem;
  padding: 0.65rem 0.75rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid #aeb9c8;
  border-radius: 0.65rem;
}

.choices {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
}

.choices legend {
  padding-inline: 0.3rem;
}

.choices label {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  font-size: 0.84rem;
  font-weight: 720;
}

button {
  min-height: 3rem;
  padding-inline: 1.2rem;
  color: #fff;
  background: var(--blue);
  border: 0;
  border-radius: 0.7rem;
  cursor: pointer;
  font-weight: 800;
}

button:hover {
  background: #2341ad;
}

.closure-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1rem;
  align-items: center;
  margin-top: 1.25rem;
  padding: 1.1rem;
  color: #dffdfa;
  background: var(--navy);
  border-radius: 0.85rem;
}

.closure-card .section-label {
  color: var(--cyan);
}

.closure-card h2 {
  color: #fff;
  font-size: 1rem;
}

.closure-card > strong {
  grid-row: span 2;
  font-size: 2.6rem;
}

.closure-card > p {
  grid-column: 1 / -1;
  margin: 0.45rem 0 0;
  color: #adbed2;
  font-size: 0.82rem;
}

.closure-card code {
  color: #fff;
}

.output-heading {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
}

.status {
  flex: none;
  padding: 0.35rem 0.65rem;
  color: var(--muted);
  background: var(--surface-soft);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}

.status[data-state="success"] {
  color: var(--green);
  background: #effaf6;
}

.status[data-state="error"] {
  color: var(--red);
  background: #fff2f1;
}

.pipeline {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.pipeline article {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1rem;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
}

.pipeline article > span {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: #fff;
  background: var(--blue);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 850;
}

.pipeline article > div {
  display: grid;
  min-width: 0;
}

.pipeline code {
  overflow-wrap: anywhere;
  color: #3048a8;
  font-size: 0.75rem;
}

.pipeline strong {
  margin-top: 0.25rem;
}

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

.composed-result {
  margin-top: 1rem;
  padding: 1.1rem;
  background: #edf1ff;
  border-radius: 0.85rem;
}

.composed-result h2 {
  font-size: 1rem;
}

.composed-result pre {
  max-height: 22rem;
  margin: 0.8rem 0 0;
  padding: 1rem;
  overflow: auto;
  color: #dffdfa;
  background: var(--navy);
  border-radius: 0.65rem;
  font: 0.78rem/1.65 "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

.concept-note {
  margin-top: 1rem;
  padding: 1rem 1.2rem;
  color: #244355;
  background: #e8faf7;
  border: 1px solid #b9ebe5;
  border-radius: 0.85rem;
}

.concept-note p {
  margin: 0.35rem 0 0;
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

@media (min-width: 42rem) {
  form {
    grid-template-columns: 1fr 1fr;
  }

  .field--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 62rem) {
  .lab-grid {
    grid-template-columns: minmax(19rem, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }

  .input-panel {
    position: sticky;
    top: 1rem;
  }
}

@media (max-width: 34rem) {
  .output-heading {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}