:root {
  color-scheme: dark;
  --bg: #07101c;
  --surface: rgba(15, 23, 42, 0.94);
  --surface-muted: rgba(15, 23, 42, 0.78);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: #7dd3fc;
  --border: rgba(148, 163, 184, 0.14);
  --shadow: 0 28px 60px rgba(15, 23, 42, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.14), transparent 18%),
    radial-gradient(
      circle at 90% 2%,
      rgba(56, 189, 248, 0.08),
      transparent 16%
    ),
    linear-gradient(180deg, #020617 0%, #07101c 100%);
  color: var(--text);
  font-family:
    Inter,
    "Segoe UI",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  line-height: 1.75;
}

img,
video,
iframe {
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition:
    color 0.2s ease,
    transform 0.2s ease;
}
a:hover,
a:focus {
  color: var(--accent-soft);
}

.site-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.site-brand-name {
  font-size: clamp(1.9rem, 3vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0;
}

.site-brand-tag {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 1rem;
  opacity: 0.92;
  max-width: 34rem;
}

/* Nav (desktop) */
.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}
.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  transition:
    background 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.site-nav a:hover,
.site-nav a:focus {
  background: rgba(56, 189, 248, 0.16);
  color: #fff;
}

/* Hamburger toggle (hidden by default) */
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 0.25rem;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--muted);
  margin: 3px 0;
  transition:
    transform 0.15s ease,
    opacity 0.15s ease;
}

.site-main {
  padding: 1.75rem 0 0;
  display: grid;
  gap: 1.75rem;
}

.home-hero,
.home-panel,
.site-footer,
article.post {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

article.post {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  width: min(100%, 92ch);
  margin: 0 auto;
  padding: 1.85rem 1.8rem;
}

article.post > .post-header,
article.post > .share-links,
article.post > .post-content,
article.post > .post_navi {
  width: 100%;
}

.home-hero {
  padding: 2.7rem 2.15rem;
}
.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.82rem;
}
.home-hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 5vw, 3.7rem);
  line-height: 1.02;
}
.home-hero p {
  margin: 1.2rem 0 0;
  max-width: 46rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.home-panels {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.home-panel {
  padding: 2rem;
}
.home-panel h2 {
  margin-bottom: 1rem;
}

.post-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.95rem;
}
.post-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.35rem;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.08);
}
.post-list-item a {
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
}
.post-list-item span {
  color: var(--muted);
  font-size: 0.93rem;
  white-space: nowrap;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}
.tag-list span {
  display: inline-flex;
  align-items: center;
  padding: 0.58rem 0.95rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-soft);
  font-size: 0.94rem;
  border: 1px solid rgba(56, 189, 248, 0.16);
}

.post-title {
  margin: 0 0 0.35em;
}
.post-meta {
  color: var(--muted);
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
  display: flex;
  gap: 0.65rem;
  align-items: center;
  flex-wrap: wrap;
}

.share-links {
  margin: 1.5rem 0 0;
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

.post-content {
  padding-top: 0.5rem;
  line-height: 1.95;
  color: #cbd5e1;
  max-width: 92ch;
  margin: 0 auto;
  padding-left: 0.9rem;
  padding-right: 0.9rem;
}

/* Post header layout: keep title left-aligned on desktop, centered on small screens */
article.post > .post-header {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  align-items: flex-start;
  width: 100%;
}
article.post > .post-header .post-title {
  max-width: 100%;
}

@media (max-width: 768px) {
  article.post > .post-header {
    align-items: center;
    text-align: center;
  }
  .post-meta {
    justify-content: center;
  }
  .share-links {
    justify-content: center;
  }
}

/* Desktop: add subtle separation and spacing for post header/meta */
article.post > .post-header {
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.06);
}
.post-meta > * {
  margin-right: 0.6rem;
}
.post-meta a {
  color: var(--accent);
  text-decoration: none;
}
.post-meta a:hover {
  text-decoration: underline;
}
.share-links {
  margin-top: 0.9rem;
}
.post-content h2,
.post-content h3,
.post-content h4 {
  color: #f8fafc;
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}
.post-content p,
.post-content li {
  margin: 1rem 0;
}
.post-content ul,
.post-content ol {
  margin: 1.2rem 0 1.2rem 1.4rem;
}
.post-content a {
  color: var(--accent);
}
.post-content blockquote {
  margin: 1.8rem 0;
  padding: 1.25rem 1.3rem;
  border-left: 4px solid rgba(56, 189, 248, 0.45);
  background: rgba(15, 23, 42, 0.75);
  color: #e2e8f0;
}
.post-content img {
  display: block;
  max-width: 100%;
  border-radius: 1rem;
  margin: 1.75rem auto;
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.22);
}

/* Prevent overflow for long content (code blocks, tables, iframes) */
.post-content pre,
.post-content code,
.post-content table,
.post-content iframe {
  max-width: 100%;
  overflow-x: auto;
}
.post-content code {
  word-break: break-word;
}

.post_navi {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}
.post_navi .post_navi-item {
  padding: 1rem 1.2rem;
  flex: 1 1 220px;
  min-width: 220px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.82);
  color: var(--text) !important;
  border: 1px solid rgba(148, 163, 184, 0.08);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}
.post_navi .post_navi-item:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.2);
}
.post_navi-label {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 0.4rem;
}
.post_navi-arrow {
  font-size: 1.8rem;
  opacity: 0.45;
}

.site-footer {
  padding: 2rem 1.6rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  background: rgba(15, 23, 42, 0.82);
}
.site-footer a {
  color: var(--accent);
}
.site-footer p {
  margin: 0.4rem 0;
}

/* Responsive breakpoints */
@media (max-width: 880px) {
  .home-panels {
    grid-template-columns: 1fr;
  }
}

/* Tablet & below */
@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-bottom: 0.5rem;
  }
  .site-nav {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.85rem;
  }
  .site-nav a {
    padding: 0.6rem 1.2rem;
    min-height: 2.75rem;
    border-radius: 12px;
    background: rgba(56, 189, 248, 0.07);
    border: 1px solid rgba(56, 189, 248, 0.1);
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 500;
  }
  .site-nav a:hover,
  .site-nav a:focus {
    background: rgba(56, 189, 248, 0.14);
    border-color: rgba(56, 189, 248, 0.22);
    color: var(--accent-soft);
  }
  .site-main {
    padding-top: 1.25rem;
  }
  article.post {
    padding: 1.8rem 1.5rem;
  }
  .post-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1.25rem;
  }
  .post-title {
    font-size: clamp(1.5rem, 3.5vw, 2.5rem);
    margin-bottom: 0.75rem;
  }
  .post-content {
    max-width: 72ch;
    margin: 0 auto;
    padding: 0 0.75rem;
    box-sizing: border-box;
  }
  .share-links {
    margin: 1.4rem 0 1.5rem;
  }
  .post_navi {
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.8rem;
    padding-top: 1.5rem;
  }
  .post_navi .post_navi-item {
    width: 100%;
    padding: 0.9rem 1rem;
    font-size: 0.92rem;
  }
  .post-list-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-footer {
    flex-direction: column;
    text-align: center;
    justify-content: center;
    gap: 0.65rem;
  }
}

/* Mobile: make nav hamburger and styled to match site surface */
@media (max-width: 600px) {
  .site-header {
    padding-bottom: 0.35rem;
    position: relative;
    justify-content: center;
  }

  /* hamburger visible and positioned */
  .nav-toggle {
    display: inline-flex;
    position: absolute;
    right: 0.8rem;
    top: 0.9rem;
    z-index: 70;
  }
  .nav-toggle-bar {
    background: var(--muted);
  }

  /* leave space so brand doesn't collide with hamburger */
  .site-brand {
    padding-right: 0;
    width: 100%;
    max-width: min(92%, 460px);
    margin: 0 auto;
  }

  /* hide nav by default, show when open */
  .site-nav {
    display: none;
  }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    position: relative;
    align-self: center;
    width: min(96%, 380px);
    max-width: 380px;
    margin: 0.75rem auto 0;
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: 18px;
    padding: 0.45rem;
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.24);
    z-index: 60;
  }

  /* nav items match site panels: transparent background, full-width, left-aligned */
  .site-nav a {
    display: block;
    width: 100%;
    padding: 0.85rem 0.95rem;
    min-height: 2.6rem;
    font-size: 0.96rem;
    border-radius: 12px;
    color: var(--text);
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(148, 163, 184, 0.08);
    text-align: center;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
  }
  .site-nav a + a {
    border-top: 1px solid rgba(148, 163, 184, 0.08);
  }
  .site-nav a:hover,
  .site-nav a:focus {
    background: rgba(56, 189, 248, 0.06);
    color: var(--accent-soft);
  }

  .site-brand-name {
    font-size: clamp(1.5rem, 5vw, 1.9rem);
  }
  .site-brand-tag {
    font-size: 0.88rem;
  }
  .site-main {
    padding-top: 1rem;
  }
  article.post {
    padding: 1.4rem 1.15rem;
  }
  .post-title {
    font-size: clamp(1.3rem, 4vw, 1.8rem);
  }
  .home-hero {
    padding: 1.8rem 1.2rem;
  }
  .home-hero h1 {
    font-size: clamp(1.6rem, 5vw, 2.2rem);
  }
  .home-panel {
    padding: 1.4rem;
  }

  /* when open, push main down slightly (nav occupies flow) */
  .site-header.open + .site-main {
    margin-top: 0.45rem;
  }
}

/* Very small screens */
@media (max-width: 400px) {
  .site-header {
    padding-bottom: 0.2rem;
  }
  .nav-toggle {
    right: 0.65rem;
    top: 0.8rem;
  }
  .site-nav {
    gap: 0.35rem;
  }
  .site-nav a {
    padding: 0.5rem 0.75rem;
    min-height: 2.4rem;
    font-size: 0.82rem;
  }
  .site-brand-name {
    font-size: clamp(1.3rem, 5vw, 1.6rem);
  }
  .site-brand-tag {
    font-size: 0.8rem;
  }
  .site-main {
    padding-top: 0.75rem;
  }
}

.site-main {
  margin-bottom: 2.5rem;
}