:root {
  --ink: #152238;
  --muted: #637188;
  --line: #dbe3ee;
  --surface: #fff;
  --soft: #f3f6fa;
  --navy: #0b1930;
  --blue: #3156d8;
  --cyan: #32d5c8;
  --green: #14866d;
  --red: #b42318;
  --amber: #b54708;
}

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

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 86% 7%, rgba(50, 213, 200, 0.17), transparent 25%),
    var(--soft);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

button,
input,
select {
  font: inherit;
}

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

.intro {
  max-width: 54rem;
  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: 48rem;
  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;
}

.panel {
  min-width: 0;
  padding: clamp(1.25rem, 4vw, 2rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  box-shadow: 0 1.2rem 3rem rgba(21, 34, 56, 0.07);
}

.panel h2 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: -0.035em;
}

.preferences {
  display: grid;
  gap: 1rem;
  align-items: end;
}

.field {
  display: grid;
  gap: 0.35rem;
}

.field label,
.choices legend {
  font-size: 0.78rem;
  font-weight: 780;
}

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

.field input[aria-invalid="true"] {
  border-color: var(--red);
}

.field .error {
  min-height: 1.1em;
  color: var(--red);
  font-size: 0.72rem;
}

button {
  min-height: 2.8rem;
  padding-inline: 1rem;
  border-radius: 0.7rem;
  cursor: pointer;
  font-weight: 800;
}

.primary-button {
  color: #fff;
  background: var(--blue);
  border: 0;
}

.secondary-button {
  color: var(--blue);
  background: #edf1ff;
  border: 1px solid #cdd6ff;
}

button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.app-status {
  margin: 1rem 0;
  padding: 0.75rem 0.9rem;
  color: #244355;
  background: #e8faf7;
  border-radius: 0.7rem;
  font-weight: 700;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.metrics article {
  padding: 1rem;
  color: #fff;
  background: var(--navy);
  border-radius: 0.9rem;
}

.metrics span {
  display: block;
  color: #a9b8cc;
  font-size: 0.7rem;
  font-weight: 750;
}

.metrics strong {
  display: block;
  margin-top: 0.2rem;
  font-size: 1.7rem;
}

.workspace {
  display: grid;
  gap: 1rem;
}

form {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

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

.choices label {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 700;
}

.storage-note {
  margin: 1rem 0 0;
  padding: 0.85rem;
  color: var(--muted);
  background: var(--soft);
  border-radius: 0.7rem;
  font-size: 0.78rem;
}

.section-heading,
.task-card__heading {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.task-list,
.test-results {
  display: grid;
  gap: 0.7rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.task-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-left: 0.35rem solid var(--green);
  border-radius: 0.75rem;
}

.task-card[data-priority="critical"] { border-left-color: var(--red); }
.task-card[data-priority="high"] { border-left-color: var(--amber); }
.task-card[data-priority="planned"] { border-left-color: var(--blue); }

.badge {
  flex: none;
  padding: 0.18rem 0.5rem;
  color: #34445d;
  background: var(--soft);
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 800;
}

.task-card p {
  margin: 0.35rem 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.text-button {
  min-height: auto;
  padding: 0;
  color: var(--blue);
  background: transparent;
  border: 0;
}

.empty-state {
  display: grid;
  justify-items: center;
  margin-top: 1.2rem;
  padding: 2.5rem 1rem;
  color: var(--muted);
  background: var(--soft);
  border: 1px dashed #b8c4d4;
  border-radius: 0.8rem;
}

.quality-panel {
  margin-top: 1rem;
}

.test-summary {
  display: flex;
  justify-content: space-between;
  margin-top: 1rem;
  padding: 0.8rem;
  background: var(--soft);
  border-radius: 0.7rem;
}

.test-summary span[data-state="passed"] {
  color: var(--green);
  font-weight: 800;
}

.test-results li {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
}

.test-results li[data-state="passed"] {
  border-left: 0.3rem solid var(--green);
}

.test-results li[data-state="failed"] {
  border-left: 0.3rem solid var(--red);
}

.test-results span {
  color: var(--muted);
}

.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;
}

[hidden] {
  display: none !important;
}

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

@media (min-width: 48rem) {
  .preferences {
    grid-template-columns: 1fr 0.7fr 0.7fr auto;
  }

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

  form {
    grid-template-columns: 1fr 0.7fr;
  }

  form .choices,
  form button {
    grid-column: 1 / -1;
  }
}

@media (min-width: 64rem) {
  .workspace {
    grid-template-columns: minmax(19rem, 0.75fr) minmax(0, 1.25fr);
    align-items: start;
  }

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

@media (max-width: 38rem) {
  .section-heading,
  .test-results li {
    align-items: flex-start;
    flex-direction: column;
  }
}