:root {
  --pico-spacing: 0.625rem;
  --pico-form-element-spacing-vertical: 0.35rem;
  --pico-form-element-spacing-horizontal: 0.65rem;
}

.site-header {
  padding: 0;
  background: #0f172a;
  color: #f1f5f9;
}

.site-header .banner {
  display: block;
  width: 100%;
  height: auto;
}

.site-header .header-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2.5rem;
  text-align: center;
}

.site-header hgroup p {
  color: #94a3b8;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin: 1rem 0 1.5rem;
}

.chip {
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  border: 1px solid #334155;
  color: #94a3b8;
}

.header-links {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  flex-wrap: wrap;
}

.section-intro {
  padding: 1.5rem 1.5rem 0.75rem;
  text-align: center;
}

.template-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  border-top: 1px solid var(--pico-border-color);
  border-bottom: 1px solid var(--pico-border-color);
  flex-wrap: wrap;
}

.template-label {
  font-size: 0.75rem;
  color: var(--pico-muted-color);
  white-space: nowrap;
}

.template-group {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.template-btn {
  padding: 0.25rem 0.7rem;
  border-radius: var(--pico-border-radius);
  border: 1px solid var(--pico-border-color);
  background: transparent;
  color: var(--pico-muted-color);
  font-size: 0.75rem;
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s,
    border-color 0.15s;
}

.template-btn:hover {
  border-color: var(--pico-primary);
  color: var(--pico-primary);
}

.template-btn.active {
  background: var(--pico-primary);
  border-color: var(--pico-primary);
  color: var(--pico-primary-inverse);
}

.playground-section {
  padding-inline: 1.5rem;
}

.playground {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: 56svh;
  min-height: 400px;
  max-height: 580px;
  border: 1px solid var(--pico-border-color);
  border-radius: var(--pico-border-radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.pane {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.pane-header {
  padding: 0.3rem 0.875rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pico-muted-color);
  border-bottom: 1px solid var(--pico-border-color);
  flex-shrink: 0;
  margin: 0;
  background: var(--pico-card-background-color);
}

.editor-pane {
  border-right: 1px solid var(--pico-border-color);
}

#editor {
  flex: 1;
  width: 100%;
  border: none;
  outline: none;
  resize: none;
  padding: 0.875rem 1rem;
  font-family: var(--pico-font-family-monospace);
  font-size: 0.8rem;
  line-height: 1.6;
  tab-size: 2;
  margin: 0;
}

#preview {
  flex: 1;
  background-color: var(--pico-background-color);
  overflow-y: auto;
  padding: 1.25rem;
}

@media (max-width: 767px) {
  .playground {
    grid-template-columns: 1fr;
    height: auto;
    max-height: none;
    min-height: 0;
  }

  .editor-pane {
    border-right: none;
    border-bottom: 1px solid var(--pico-border-color);
  }

  #editor,
  #preview {
    min-height: 220px;
  }
}

main section {
  padding-block: 2rem;
}

main section:nth-child(even) {
  background: var(--pico-card-background-color);
}

.steps {
  list-style: none;
  counter-reset: steps;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.steps > li {
  counter-increment: steps;
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0 0.875rem;
  align-items: start;
}

.steps > li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--pico-primary);
  color: var(--pico-primary-inverse);
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.table-wrap {
  overflow-x: auto;
}

footer {
  border-top: 1px solid var(--pico-border-color);
  text-align: center;
}