:root {
  color-scheme: dark;
  --bg: #08111f;
  --panel: #101c30;
  --panel-strong: #172742;
  --text: #f4f7fb;
  --muted: #b6c2d9;
  --accent: #72f0b9;
  --accent-strong: #33d390;
  --border: #2b3d5c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #050b14 0%, var(--bg) 100%);
  color: var(--text);
  font-family: Inter, system-ui, sans-serif;
  line-height: 1.5;
}

button,
textarea {
  font: inherit;
}

.shell {
  width: min(100%, 72rem);
  margin: 0 auto;
  padding: 1rem;
}

.layout,
.results,
.actions,
.form {
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.24);
}

.hero h1 {
  margin: 0.25rem 0 0;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.15;
}

.eyebrow,
.card-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

label {
  display: grid;
  gap: 0.5rem;
  font-weight: 600;
}

textarea {
  width: 100%;
  min-height: 3.5rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  background: var(--panel-strong);
  color: var(--text);
}

textarea::placeholder {
  color: var(--muted);
}

button {
  min-height: 3.25rem;
  padding: 0.9rem 1rem;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #062216;
  font-weight: 800;
}

button:hover,
button:focus-visible {
  background: var(--accent-strong);
}

.result-card p,
.result-card pre {
  margin: 0.5rem 0 0;
}

.score {
  font-size: 2.5rem;
  font-weight: 800;
}

pre {
  white-space: pre-wrap;
  font-family: inherit;
  color: var(--muted);
}

@media (min-width: 52rem) {
  .layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(18rem, 0.8fr);
    align-items: start;
  }

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