:root {
  --bg0: #0c1210;
  --bg1: #121a17;
  --ink: #e8f0eb;
  --muted: #8fa399;
  --line: rgba(168, 214, 186, 0.16);
  --accent: #3ecf8e;
  --accent-dim: #1f6b4a;
  --warn: #e6b35a;
  --panel: rgba(18, 28, 24, 0.88);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Outfit", system-ui, sans-serif;
}

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

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg0);
  line-height: 1.55;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(62, 207, 142, 0.18), transparent 60%),
    radial-gradient(700px 420px at 92% 8%, rgba(90, 140, 255, 0.1), transparent 55%),
    linear-gradient(165deg, #0c1210 0%, #101816 45%, #0a0f0d 100%);
}

.bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cpath d='M0 80H160M80 0V160' stroke='%23a8d6ba' stroke-opacity='0.06'/%3E%3C/svg%3E");
}

.site-header,
main,
footer {
  width: min(960px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  padding: 2.25rem 0 0.5rem;
}

.brand {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.tagline {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.intro {
  padding: 1.5rem 0 0.5rem;
}

.intro h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.intro > p {
  margin: 0;
  max-width: 46rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.id-panel {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  backdrop-filter: blur(8px);
}

.id-panel .label {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.id-panel code,
.id-panel strong {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--accent);
  word-break: break-all;
}

.hint {
  margin: 0.9rem 0 0;
  font-size: 0.9rem;
  color: var(--warn);
}

.explain,
.signals {
  margin-top: 2.5rem;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.pillars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}

.pillars li {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(16, 24, 21, 0.7);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.pillars strong {
  font-size: 0.95rem;
}

.pillars span {
  font-size: 0.88rem;
  color: var(--muted);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.ghost-btn {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
}

.ghost-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.ghost-btn.copied {
  border-color: var(--accent);
  color: var(--accent);
}

.groups {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.loading {
  color: var(--muted);
}

.group {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--panel);
}

.group summary {
  list-style: none;
  cursor: pointer;
  padding: 0.95rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 600;
}

.group summary::-webkit-details-marker {
  display: none;
}

.group summary::after {
  content: "+";
  font-family: var(--mono);
  color: var(--muted);
}

.group[open] summary::after {
  content: "−";
  color: var(--accent);
}

.group-body {
  border-top: 1px solid var(--line);
  padding: 0.25rem 0;
}

.row {
  display: grid;
  grid-template-columns: minmax(140px, 220px) 1fr;
  gap: 0.75rem;
  padding: 0.65rem 1.1rem;
  border-bottom: 1px solid rgba(168, 214, 186, 0.08);
}

.row:last-child {
  border-bottom: none;
}

.row .key {
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--mono);
}

.row .val {
  font-size: 0.88rem;
  font-family: var(--mono);
  word-break: break-word;
  white-space: pre-wrap;
}

.row .val.long {
  font-size: 0.78rem;
  color: #b7cfc2;
}

footer {
  margin-top: 3rem;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

footer p {
  margin: 0;
}

@media (max-width: 720px) {
  .id-panel {
    grid-template-columns: 1fr;
  }

  .row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}