:root {
  --bg: #0f1720;
  --panel: #17212b;
  --panel-2: #1d2935;
  --border: #2b3a47;
  --text: #e5edf4;
  --muted: #9fb0bf;
  --accent: #7fb3ff;
  --good: #b8d9a6;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #0c1218 0%, #101922 100%);
  color: var(--text);
}

.page-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 18px 48px;
}

.hero {
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.1;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 780px;
  line-height: 1.5;
}

.tool-card,
.result-card,
.notes-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.22);
}

.tool-card { margin-bottom: 20px; }
.result-card { margin-bottom: 20px; }

.input-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

input {
  flex: 1 1 420px;
  min-width: 220px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 1rem;
}

button {
  border: 0;
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 1rem;
  cursor: pointer;
}

#lookupBtn {
  background: var(--accent);
  color: #0b1117;
  font-weight: 700;
}

.quick-picks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
  color: var(--muted);
}

.chip {
  background: #243344;
  color: var(--text);
  padding: 9px 12px;
  border: 1px solid var(--border);
  font-size: 0.95rem;
}

.supported-wrap {
  margin-top: 14px;
  color: var(--muted);
}

summary {
  cursor: pointer;
  font-weight: 700;
}

.result-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.result-head h2 {
  margin: 0 0 6px;
  font-size: 1.8rem;
}

.result-head p {
  margin: 0;
  color: var(--muted);
}

.badge {
  background: rgba(127, 179, 255, 0.14);
  color: var(--accent);
  border: 1px solid rgba(127, 179, 255, 0.28);
  border-radius: 999px;
  padding: 9px 12px;
  font-size: 0.88rem;
  white-space: nowrap;
}

.spec-grid,
.fluid-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.section-title {
  margin: 22px 0 12px;
  font-size: 1.1rem;
}

.spec-item {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}

.spec-item .label {
  display: block;
  color: var(--muted);
  font-size: 0.84rem;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.spec-item .value {
  display: block;
  line-height: 1.45;
}

.notes {
  margin-top: 18px;
  padding: 16px;
  border-radius: 14px;
  background: rgba(184, 217, 166, 0.08);
  border: 1px solid rgba(184, 217, 166, 0.18);
}

.notes h3 {
  margin: 0 0 8px;
  color: var(--good);
  font-size: 1rem;
}

.notes p {
  margin: 0;
  line-height: 1.55;
}

.hidden { display: none; }

.error {
  border-color: rgba(255, 128, 128, 0.35);
  background: rgba(160, 34, 34, 0.12);
}

.notes-card h2 {
  margin-top: 0;
}

.notes-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 20px 12px 36px;
  }

  .tool-card,
  .result-card,
  .notes-card {
    padding: 16px;
  }

  button,
  input {
    width: 100%;
  }
}