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

html, body {
  margin: 0;
  padding: 0;
  background: #0f1115;
  color: #e6e8eb;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

header {
  padding: 32px 40px 24px;
  border-bottom: 1px solid #23262d;
  position: sticky;
  top: 0;
  background: rgba(15, 17, 21, 0.92);
  backdrop-filter: blur(8px);
  z-index: 10;
}

header h1 {
  margin: 0 0 6px;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.meta {
  margin: 0;
  font-size: 0.875rem;
  color: #9aa1ad;
}

.meta a {
  color: #9aa1ad;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.meta a:hover { color: #e6e8eb; }

.page-nav {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
}

.page-nav__link {
  font-size: 0.8125rem;
  color: #9aa1ad;
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid #23262d;
  background: #161920;
  transition: color 120ms, border-color 120ms, background 120ms;
}

.page-nav__link:hover {
  color: #e6e8eb;
  border-color: #3a3f49;
}

.page-nav__link.is-active {
  color: #0f1115;
  background: #ff9a3c;
  border-color: #ff9a3c;
}

.page-block {
  margin: 0 0 64px;
  scroll-margin-top: 140px;
}

.page-header {
  margin: 40px 0 20px;
  padding-top: 24px;
  border-top: 1px solid #23262d;
}

.page-block:first-child .page-header {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-title {
  margin: 0 0 4px;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #e6e8eb;
}

.page-urls {
  margin: 0;
  font-size: 0.8125rem;
  color: #9aa1ad;
}

.page-urls a {
  color: #9aa1ad;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-urls a:hover { color: #e6e8eb; }

main {
  max-width: 1500px;
  margin: 0 auto;
  padding: 32px 40px 80px;
}

.section {
  margin: 0 0 48px;
}

.section h2,
.section h3 {
  margin: 0 0 16px;
  font-size: 1rem;
  font-weight: 500;
  color: #c6cbd3;
  letter-spacing: 0.02em;
}

.section--full {
  margin-bottom: 64px;
}

.section--full h2 {
  font-size: 1.125rem;
  color: #e6e8eb;
}

.sections-heading {
  margin: 48px 0 20px;
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9aa1ad;
  border-top: 1px solid #23262d;
  padding-top: 24px;
}

.sections-toggle-wrap {
  margin: 20px 0 0;
}

.sections-toggle {
  appearance: none;
  background: transparent;
  color: #9aa1ad;
  border: 1px solid #23262d;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.8125rem;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: color 120ms, border-color 120ms, background 120ms;
}

.sections-toggle:hover {
  color: #e6e8eb;
  border-color: #3a3f49;
  background: #161920;
}

.sections-toggle[aria-expanded="true"] {
  color: #ff9a3c;
  border-color: #ff9a3c;
}

.sections-container {
  margin-top: 24px;
}

.sections-container .section {
  margin-bottom: 32px;
}

.slider {
  width: 100%;
  display: block;
  --divider-color: #ff9a3c;
  --divider-width: 2px;
  --default-handle-color: #ff9a3c;
  --default-handle-width: 48px;
  --default-handle-opacity: 1;
  background: #1a1d24;
  border: 1px solid #23262d;
  border-radius: 12px;
  overflow: hidden;
}

.slider img {
  width: 100%;
  display: block;
}

.loading, .error {
  color: #9aa1ad;
  padding: 24px;
  background: #1a1d24;
  border: 1px solid #23262d;
  border-radius: 8px;
}

.error {
  color: #ffb8b8;
  border-color: #4a2a2a;
  background: #2a1515;
}

.error code {
  background: #3a1f1f;
  padding: 1px 6px;
  border-radius: 4px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.875em;
}

@media (max-width: 720px) {
  header, main { padding-left: 20px; padding-right: 20px; }
}