:root {
  --bg: #ffffff;
  --bg-accent: #f4f7fb;
  --surface: #ffffff;
  --surface-strong: #ffffff;
  --ink: #172033;
  --muted: #5a667b;
  --line: #d9e1ec;
  --brand: #234a84;
  --brand-dark: #17345d;
  --success: #1f6a4d;
  --error: #b33a3a;
  --shadow: 0 18px 40px rgba(18, 31, 53, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(35, 74, 132, 0.05), transparent 26%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-accent) 100%);
}

code,
input,
button {
  font-family: "IBM Plex Mono", monospace;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.hero {
  max-width: 800px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--brand-dark);
  font-size: 0.76rem;
  font-weight: 800;
}

.hero h1 {
  margin: 0;
  max-width: 12ch;
  font-size: 2.3rem;
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.lede {
  max-width: 64ch;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.7;
  margin-top: 16px;
}

.grid {
  display: grid;
  grid-template-columns: minmax(300px, 400px) minmax(320px, 1fr);
  gap: 20px;
  align-items: start;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.card-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.section-label {
  font-size: 1.3rem;
  font-weight: 800;
}

.status-badge {
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.78rem;
  font-weight: 700;
}

.status-idle {
  background: #eef2f7;
  color: var(--muted);
}

.status-success {
  background: rgba(31, 106, 77, 0.12);
  color: var(--success);
}

.status-error {
  background: rgba(179, 58, 58, 0.12);
  color: var(--error);
}

.form-stack {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field > span,
.reference h2,
.message h2,
.feature-block h2 {
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0;
}

.field input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-strong);
  padding: 14px 16px;
  font-size: 0.95rem;
  color: var(--ink);
}

.field input:focus {
  outline: 2px solid rgba(35, 74, 132, 0.14);
  border-color: var(--brand);
}

.field small {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.no-break {
  white-space: nowrap;
}

button {
  border: 0;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--brand) 0%, #2e5c9f 100%);
  color: #f7faff;
  padding: 15px 18px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
  box-shadow: 0 12px 28px rgba(35, 74, 132, 0.2);
}

button:hover {
  transform: translateY(-1px);
}

.reference {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.reference p,
.message p {
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.65;
}

.reference-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.reference-links a {
  color: var(--brand-dark);
  font-family: "Manrope", sans-serif;
  font-size: 0.96rem;
  font-weight: 700;
  line-height: 1.65;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.metric {
  padding: 18px;
  border-radius: 20px;
  background: #fbfcfe;
  border: 1px solid var(--line);
  min-height: 120px;
}

.hero-metric {
  background: linear-gradient(180deg, rgba(35, 74, 132, 0.08), #fbfcfe);
}

.hero-metric.accent {
  background: linear-gradient(180deg, rgba(31, 106, 77, 0.08), #fbfcfe);
}

.metric-label,
.metric-unit {
  display: block;
  color: var(--muted);
}

.metric strong {
  display: block;
  margin: 12px 0 8px;
  font-size: clamp(1.2rem, 2.2vw, 2rem);
  line-height: 1.05;
}

.message,
.feature-block {
  border-radius: 22px;
  padding: 20px;
  background: #fbfcfe;
  border: 1px solid var(--line);
}

.error-message {
  border-color: rgba(179, 58, 58, 0.18);
  background: #fff7f7;
}

.feature-block {
  margin-top: 18px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
}

.feature-list div {
  padding: 12px 14px;
  border-radius: 16px;
  background: #f5f8fc;
}

.feature-list dt {
  color: var(--muted);
  font-size: 0.88rem;
}

.feature-list dd {
  margin: 8px 0 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
}

@media (max-width: 920px) {
  .hero h1 {
    font-size: 2.55rem;
  }

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

  .result-grid,
  .feature-list {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1200px) {
  .hero h1 {
    font-size: 2.08rem;
  }

  .lede,
  .reference p,
  .message p,
  .field small,
  .reference-links a {
    font-size: 0.92rem;
  }
}