:root {
  --sp-font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --sp-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --sp-color-bg: #f5f5f7;
  --sp-color-surface: #ffffff;
  --sp-color-border: #e2e8f0;
  --sp-color-text: #111827;
  --sp-color-muted: #6b7280;
  --sp-color-accent: #2563eb;
  --sp-color-accent-soft: #dbeafe;
  --sp-color-footer-bg: #f3f4f6;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--sp-font-body);
  background-color: var(--sp-color-bg);
  color: var(--sp-color-text);
  line-height: 1.6;
  font-size: 16px;
}

a {
  color: var(--sp-color-accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.sp-skip-link {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  background: var(--sp-color-accent);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  z-index: 1000;
}

.sp-skip-link:focus {
  left: 0.5rem;
}

.sp-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1rem;
}

.sp-header {
  background-color: var(--sp-color-surface);
  border-bottom: 1px solid var(--sp-color-border);
}

.sp-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.sp-brand {
  min-width: 0;
}

.sp-site-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--sp-color-text);
}

.sp-site-subtitle {
  margin: 0.15rem 0 0;
  font-size: 0.95rem;
  color: var(--sp-color-muted);
}

.sp-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.sp-nav-link {
  font-size: 0.95rem;
  padding: 0.25rem 0.4rem;
  border-radius: 999px;
}

.sp-nav-link:hover,
.sp-nav-link:focus-visible {
  background-color: var(--sp-color-accent-soft);
  text-decoration: none;
}

.sp-main {
  padding: 2rem 0 3rem;
}

.sp-section {
  margin-bottom: 2rem;
}

.sp-h1 {
  font-size: 1.75rem;
  margin: 0 0 1rem;
}

.sp-post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sp-post-card {
  padding: 1rem 1.1rem;
  border-radius: 0.75rem;
  background-color: var(--sp-color-surface);
  border: 1px solid var(--sp-color-border);
}

.sp-post-title {
  margin: 0 0 0.35rem;
  font-size: 1.25rem;
}

.sp-post-meta {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  color: var(--sp-color-muted);
}

.sp-post-summary {
  margin: 0.25rem 0 0.5rem;
}

.sp-post-tags {
  margin: 0.3rem 0 0;
  font-size: 0.85rem;
}

.sp-tag-link {
  display: inline-block;
  margin-right: 0.35rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--sp-color-border);
  font-size: 0.8rem;
  color: var(--sp-color-muted);
  background-color: #fff;
}

.sp-tag-link:hover,
.sp-tag-link:focus-visible {
  color: var(--sp-color-text);
  border-color: var(--sp-color-accent);
}

.sp-pagination {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
}

.sp-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--sp-color-accent);
  background-color: var(--sp-color-accent);
  color: #fff;
  font-size: 0.9rem;
}

.sp-button:hover,
.sp-button:focus-visible {
  text-decoration: none;
  background-color: #1d4ed8;
  border-color: #1d4ed8;
}

.sp-button-ghost {
  background-color: transparent;
  color: var(--sp-color-accent);
}

.sp-button-ghost:hover,
.sp-button-ghost:focus-visible {
  background-color: var(--sp-color-accent-soft);
}

.sp-article {
  padding: 1.4rem 1.2rem 1.8rem;
  border-radius: 0.9rem;
  background-color: var(--sp-color-surface);
  border: 1px solid var(--sp-color-border);
}

.sp-article-header {
  margin-bottom: 1rem;
}

.sp-article-body {
  font-size: 1rem;
}

.sp-article-body p {
  margin: 0 0 1rem;
}

.sp-article-body h2,
.sp-article-body h3,
.sp-article-body h4 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.sp-article-body pre,
.sp-article-body code {
  font-family: var(--sp-font-mono);
  font-size: 0.9rem;
}

.sp-article-body pre {
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background-color: #111827;
  color: #e5e7eb;
  overflow-x: auto;
}

.sp-tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sp-tag-list-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.95rem;
}

.sp-tag-count {
  font-size: 0.85rem;
  color: var(--sp-color-muted);
}

.sp-footer {
  background-color: var(--sp-color-footer-bg);
  border-top: 1px solid var(--sp-color-border);
  padding: 1rem 0;
}

.sp-footer-inner {
  display: flex;
  justify-content: center;
}

.sp-footer-text {
  margin: 0;
  font-size: 0.85rem;
  color: var(--sp-color-muted);
  text-align: center;
}

.sp-footer-link {
  color: inherit;
  text-decoration: underline;
}

.sp-footer-link:hover,
.sp-footer-link:focus-visible {
  color: var(--sp-color-accent);
}

@media (max-width: 640px) {
  .sp-header-inner {
    align-items: flex-start;
  }
}