.accordion-root {
  padding-inline: var(--gutter);
  padding-bottom: 72px;
  max-width: 900px;
  margin-inline: auto;
}


.accordion-item {
  border: 2px solid var(--c-line);
  border-radius: var(--r-lg);
  margin-bottom: 14px;
  background: var(--c-surface);
  overflow: hidden;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.accordion-item:has(.accordion-trigger[aria-expanded="true"]) {
  border-color: var(--accent, var(--c-blue));
  box-shadow: var(--shadow-hard);
}


.accordion-trigger {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  min-height: 64px;
  padding: 14px 20px;
  background: none;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-fast);
}
.accordion-trigger:hover {
  background: var(--accent-tint, var(--c-blue-tint));
}


.accordion-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--accent, var(--c-blue));
  color: var(--c-surface);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  border-radius: var(--r-sm);
  box-shadow: 2px 2px 0 var(--c-ink);
  flex-shrink: 0;
}
.accordion-trigger[aria-expanded="true"] .accordion-num {
  background: var(--accent-dark, var(--c-blue-dark));
}


.accordion-title-wrap {
  flex: 1;
  min-width: 0;
}
.accordion-title {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  color: var(--accent, var(--c-blue));
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent, var(--c-blue)) 35%, transparent);
  transition: color var(--dur-fast), text-decoration-color var(--dur-fast);
}
.accordion-trigger:hover .accordion-title,
.accordion-trigger[aria-expanded="true"] .accordion-title {
  text-decoration-color: var(--accent, var(--c-blue));
}

.accordion-summary {
  display: block;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--c-ink-soft);
  margin-top: 2px;
  font-style: italic;
  line-height: 1.4;
}


.accordion-chevron {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--accent, var(--c-blue));
  transition: transform var(--dur-mid) var(--ease-out);
}
.accordion-trigger[aria-expanded="true"] .accordion-chevron {
  transform: rotate(180deg);
}


.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-mid) var(--ease-out);
}
.accordion-panel.is-open {
  grid-template-rows: 1fr;
}

.accordion-panel-inner {
  overflow: hidden;
}

.accordion-panel-body {
  padding: 24px 24px 28px;
  border-top: 1.5px solid var(--c-line);
  background: var(--c-surface);
}


.btn-open-sim {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 12px 28px;
  background: var(--accent, var(--c-blue));
  color: var(--c-surface);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  border-radius: var(--r-pill);
  box-shadow: 3px 3px 0 var(--c-ink);
  min-height: 44px;
  cursor: pointer;
  transition: background var(--dur-fast), transform var(--dur-fast), box-shadow var(--dur-fast);
}
.btn-open-sim:hover {
  background: var(--accent-dark, var(--c-blue-dark));
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--c-ink);
}
.btn-open-sim:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--c-ink);
}


.page-content {
  padding: 24px var(--gutter) 72px;
  max-width: 760px;
  margin-inline: auto;
  font-family: var(--font-body);
}
.page-content h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent, var(--c-blue));
  margin-block: 1.6em 0.5em;
}
.page-content p {
  margin-bottom: 1.1em;
}
.page-content ol, .page-content ul {
  padding-left: 1.6em;
  margin-bottom: 1.2em;
}
.page-content li {
  margin-bottom: 0.5em;
}
.page-content ol li {
  list-style: decimal;
}
.page-content ul li {
  list-style: disc;
}