:root {
  color-scheme: light;
  --bg: #f7f6f2;
  --panel: #ffffff;
  --ink: #1f2933;
  --muted: #5b6670;
  --rule: #d6d9dd;
  --accent: #0f4c81;
  --accent-soft: #e6f0f8;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
  --serif: 'Source Serif 4', 'Source Serif Pro', Georgia, 'Times New Roman', serif;
  --sans: 'Source Sans 3', 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background: radial-gradient(1200px 400px at 10% 0%, #eef2f6 0%, transparent 55%),
              radial-gradient(900px 300px at 100% 10%, #f6efe6 0%, transparent 60%),
              var(--bg);
}

main {
  max-width: 960px;
  margin: 48px auto;
  padding: 32px;
  background: var(--panel);
  border: 1px solid var(--rule);
  box-shadow: 0 18px 40px rgba(20, 34, 50, 0.08);
}

header {
  border-bottom: 2px solid var(--rule);
  padding-bottom: 18px;
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 8px;
  font-size: 32px;
  letter-spacing: 0.02em;
}

.subtitle {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.back-link {
  margin: 0 0 16px;
  font-family: var(--sans);
  font-size: 12px;
}

.back-link a {
  color: var(--accent);
  text-decoration: none;
}

.back-link a:hover { text-decoration: underline; }

section { margin-bottom: 28px; }

h2 {
  margin: 0 0 12px;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
  font-family: var(--sans);
}

.meta div {
  padding: 10px 12px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  font-size: 14px;
}

.meta strong {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

pre {
  margin: 0;
  padding: 18px;
  overflow-x: hidden;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: #fff;
  color: #111820;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
}

.prompt-explorer {
  position: sticky;
  top: 12px;
  z-index: 10;
  margin-bottom: 14px;
  padding: 16px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #f8fafc;
  box-shadow: 0 8px 22px rgba(20, 34, 50, 0.10);
  font-family: var(--sans);
}

.prompt-explorer__intro {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.prompt-explorer__controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.prompt-filter {
  --section-color: var(--accent);
  appearance: none;
  padding: 8px 12px 8px 10px;
  border: 1px solid #c7cdd4;
  border-left: 5px solid var(--section-color);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font: 600 13px/1.2 var(--sans);
  text-decoration: none;
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease,
              transform 140ms ease;
}

.prompt-filter:hover {
  border-color: var(--section-color);
  transform: translateY(-1px);
}

.prompt-filter:focus-visible {
  outline: 3px solid rgba(15, 76, 129, 0.25);
  outline-offset: 2px;
}

.prompt-filter[aria-current="true"] {
  border-color: var(--section-color);
  background: var(--section-color);
  color: #fff;
}

.prompt-filter[data-section="all"] { --section-color: #45525f; }
.prompt-filter[data-section="domain"] { --section-color: #4ea1e0; }
.prompt-filter[data-section="operations"] { --section-color: #e89c38; }
.prompt-filter[data-section="interface"] { --section-color: #a983e8; }

.prompt-explorer__status {
  min-height: 20px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.prompt-part {
  display: block;
  border-radius: 2px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  transition: background-color 160ms ease, color 160ms ease, opacity 160ms ease;
}

.prompt-anchor {
  display: block;
  height: 0;
  scroll-margin-top: 220px;
}

.prompt-part[data-section="domain"] { background: rgba(78, 161, 224, 0.15); }
.prompt-part[data-section="operations"] { background: rgba(232, 156, 56, 0.15); }
.prompt-part[data-section="interface"] { background: rgba(169, 131, 232, 0.16); }

.prompt-code.is-filtered .prompt-part:not(.is-active) {
  background: transparent;
  color: #111820;
  opacity: 0.28;
}

.prompt-code.is-filtered .prompt-part.is-active {
  color: #111820;
  outline: 1px solid rgba(17, 24, 32, 0.16);
}

.prompt-code.is-filtered .prompt-part.is-active[data-section="domain"] { background: rgba(78, 161, 224, 0.30); }
.prompt-code.is-filtered .prompt-part.is-active[data-section="operations"] { background: rgba(232, 156, 56, 0.30); }
.prompt-code.is-filtered .prompt-part.is-active[data-section="interface"] { background: rgba(169, 131, 232, 0.30); }

footer {
  margin-top: 28px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 12px;
}

@media (max-width: 720px) {
  main { margin: 24px 16px; padding: 24px; }
  .meta { grid-template-columns: 1fr; }
  .prompt-explorer { top: 0; }
  .prompt-filter { flex: 1 1 calc(50% - 8px); }
  .prompt-anchor { scroll-margin-top: 250px; }
}

@media (prefers-reduced-motion: reduce) {
  .prompt-filter,
  .prompt-part { transition: none; }
}