: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% 10%, 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,
select {
  font: inherit;
}

.app-shell {
  width: min(calc(100% - 2rem), 64rem);
  margin-inline: auto;
  padding-block: clamp(2.5rem, 8vw, 6rem);
}

.intro {
  max-width: 49rem;
  margin-bottom: 2.5rem;
}

.eyebrow,
.section-label {
  margin: 0 0 0.7rem;
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.intro h1 {
  margin: 0;
  font-size: clamp(2.6rem, 8vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.intro > p:last-child {
  max-width: 43rem;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.lab-card {
  padding: clamp(1.25rem, 5vw, 3rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1.5rem 4rem rgba(21, 34, 56, 0.09);
}

.lab-card h2 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: -0.035em;
}

form {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-size: 0.84rem;
  font-weight: 750;
}

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

.field input,
.field select {
  width: 100%;
  min-height: 3rem;
  padding: 0.65rem 0.75rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid #aeb9c8;
  border-radius: 0.65rem;
}

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;
}

.status {
  margin: 1.25rem 0 0;
  padding: 0.75rem 0.85rem;
  color: var(--green);
  background: #effaf6;
  border-radius: 0.65rem;
  font-size: 0.8rem;
  font-weight: 700;
}

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

.result-grid {
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0 0;
}

.result-grid div {
  min-width: 0;
  padding: 1rem;
  background: var(--navy);
  border-radius: 0.8rem;
}

.result-grid dt {
  color: #93a4bc;
  font-size: 0.68rem;
  font-weight: 750;
}

.result-grid dd {
  margin: 0.45rem 0 0;
  color: #fff;
  overflow-wrap: anywhere;
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 1rem;
}

.explanation {
  margin-top: 1rem;
  padding: 1.1rem;
  background: #edf1ff;
  border-radius: 0.8rem;
}

.explanation h2 {
  font-size: 0.9rem;
}

.explanation p {
  margin: 0.4rem 0 0;
  color: #40506a;
}

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

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

.safety-note code {
  color: #253faf;
  font-weight: 750;
}

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

@media (min-width: 42rem) {
  form {
    grid-template-columns: 1fr 0.7fr auto;
    align-items: end;
  }

  .result-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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