/* =============================================================================
   Synaxi site styles: shared nav, footer, and blog components
   Layers on top of design-system.css. Used by blog.html, blog-post.html.
   ============================================================================= */

main { position: relative; }

/* ── NAV ── */
.nav {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  z-index: 30;
  background: transparent;
}
.nav[data-solid] {
  position: relative;
  border-bottom: 1px solid var(--surface-border);
}
.nav-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
  padding: 0 1.5rem;
}
@media (min-width: 1024px) { .nav-inner { padding: 0 2.5rem; } }

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--surface-fg);
  line-height: 1;
}
.nav-logo-text {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}
@media (min-width: 900px) { .nav-links { display: flex; } }
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--surface-fg-muted);
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease-out);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { color: var(--surface-fg); }

.nav-actions { display: flex; align-items: center; gap: 0.75rem; }
.nav-signin {
  display: none;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--surface-fg-muted);
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease-out);
}
@media (min-width: 640px) { .nav-signin { display: inline-flex; } }
.nav-signin:hover { color: var(--surface-fg); }

/* ── Shared decorative gradients ── */
.closing-gradient {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background:
    radial-gradient(80% 60% at 50% 100%, rgba(30,107,255,0.30) 0%, transparent 70%),
    radial-gradient(50% 40% at 20% 0%, rgba(77,163,255,0.16) 0%, transparent 70%);
}
.blog-header-gradient {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background:
    radial-gradient(55% 45% at 80% 20%, rgba(30,107,255,0.18) 0%, transparent 65%),
    radial-gradient(45% 35% at 10% 95%, rgba(77,163,255,0.10) 0%, transparent 65%);
}

/* ── POST META ── */
.post-meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: var(--text-caption);
  color: var(--surface-fg-subtle);
}
.post-dot {
  width: 0.1875rem;
  height: 0.1875rem;
  border-radius: 999px;
  background: var(--surface-fg-subtle);
}
.post-tag {
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-cobalt);
}

.post-readmore {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-cobalt);
}
.post-readmore svg { transition: transform var(--motion-fast) var(--ease-out); }

/* ── FEATURED POST ── */
.featured-post {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-stone);
  background: var(--color-white);
  overflow: hidden;
  text-decoration: none;
  transition: border-color var(--motion) var(--ease-out), box-shadow var(--motion) var(--ease-out), transform var(--motion) var(--ease-out);
}
@media (min-width: 768px) { .featured-post { grid-template-columns: 1.1fr 1fr; } }
.featured-post:hover {
  border-color: rgba(30,107,255,0.4);
  box-shadow: 0 12px 32px rgba(30,107,255,0.08);
  transform: translateY(-2px);
}
.featured-post:hover .post-readmore svg { transform: translateX(3px); }

.featured-post-media {
  position: relative;
  min-height: 240px;
  background: var(--color-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.featured-post-media::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 50% at 50% 40%, rgba(30,107,255,0.30) 0%, transparent 70%),
    radial-gradient(50% 40% at 80% 90%, rgba(77,163,255,0.18) 0%, transparent 70%);
}
.featured-post-glyph { position: relative; color: var(--color-ink-100); opacity: 0.9; }

.featured-post-body { padding: 2rem; }
@media (min-width: 768px) { .featured-post-body { padding: 2.5rem; display: flex; flex-direction: column; justify-content: center; } }
.featured-post-title {
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--color-navy);
}
.featured-post-excerpt {
  margin-top: 1rem;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink-500);
}
.featured-post .post-readmore { margin-top: 1.5rem; }

/* ── POST GRID ── */
.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
@media (min-width: 640px)  { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .post-grid { grid-template-columns: repeat(3, 1fr); } }

.post-card {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  padding: 1.5rem;
  text-decoration: none;
  background: var(--surface-bg-elevated);
}
.post-card:hover .post-readmore svg { transform: translateX(3px); }
.post-card-title {
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--surface-fg);
}
.post-card-excerpt {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--surface-fg-muted);
  flex: 1;
}
.post-card .post-readmore { margin-top: 0.25rem; }

/* ── NEWSLETTER ── */
.newsletter-form {
  margin: 2rem auto 0;
  max-width: 28rem;
  display: flex;
  gap: 0.75rem;
}
.newsletter-input {
  flex: 1;
  height: 2.75rem;
  padding: 0 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--surface-border-strong);
  background: var(--surface-bg-elevated);
  color: var(--surface-fg);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  outline: none;
  transition: border-color var(--motion-fast) var(--ease-out);
}
.newsletter-input::placeholder { color: var(--surface-fg-subtle); }
.newsletter-input:focus { border-color: var(--color-cobalt); }

/* Stacked variant: used inside the pricing tier card */
.newsletter-form-stacked { flex-direction: column; margin: 0; max-width: none; gap: 0.625rem; }
.newsletter-form-stacked .newsletter-input { width: 100%; }

/* Status message */
.newsletter-status {
  margin-top: 0.75rem;
  font-size: var(--text-sm);
  text-align: center;
}
.newsletter-status[data-state="ok"]    { color: var(--surface-success); }
.newsletter-status[data-state="error"] { color: #ff6b6b; }
.newsletter-form-stacked .newsletter-status { margin-top: 0.5rem; font-size: 0.8125rem; }

/* ── FOOTER ── */
.footer-grid { display: grid; gap: 3rem; }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 1.5fr 3fr; } }
.footer-tagline {
  margin-top: 1.25rem;
  max-width: 18rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.footer-sub { margin-top: 0.5rem; max-width: 18rem; font-size: var(--text-sm); color: var(--surface-fg-muted); }
.footer-nav-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
@media (min-width: 640px) { .footer-nav-grid { grid-template-columns: repeat(3, 1fr); } }
.footer-nav-heading { font-size: var(--text-caption); letter-spacing: 0.08em; text-transform: uppercase; color: var(--surface-fg-subtle); font-weight: 500; }
.footer-nav-list { margin-top: 1rem; list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.footer-nav-list a { font-size: var(--text-sm); color: var(--surface-fg-muted); text-decoration: none; transition: color var(--motion-fast) var(--ease-out); }
.footer-nav-list a:hover { color: var(--surface-fg); }
.footer-bottom {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--surface-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
  font-size: 0.75rem;
  color: var(--surface-fg-subtle);
}
@media (min-width: 640px) { .footer-bottom { flex-direction: row; align-items: center; justify-content: space-between; } }
.footer-legal { display: flex; align-items: center; gap: 1.25rem; }
.footer-legal a { color: var(--surface-fg-subtle); text-decoration: none; transition: color var(--motion-fast) var(--ease-out); }
.footer-legal a:hover { color: var(--surface-fg); }

/* ── Icons ── */
.icon { display: inline-block; vertical-align: middle; }
.icon-sm { width: 1rem; height: 1rem; }
.icon-md { width: 1.125rem; height: 1.125rem; }
.icon-lg { width: 1.25rem; height: 1.25rem; }

/* ── BLOG POST (article) ── */
.article-header { position: relative; overflow: hidden; padding: 9rem 0 3rem; }
.article-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--surface-fg-muted);
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease-out);
}
.article-back:hover { color: var(--surface-fg); }
.article-back svg { transition: transform var(--motion-fast) var(--ease-out); }
.article-back:hover svg { transform: translateX(-3px); }

.article-title {
  margin-top: 1.5rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.06;
}
.article-lede {
  margin-top: 1.25rem;
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--surface-fg-muted);
}
.article-byline {
  margin-top: 1.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.article-avatar {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-cobalt), var(--color-azure));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-sm);
  color: #fff;
}
.article-byline-text { font-size: var(--text-sm); }
.article-byline-name { color: var(--surface-fg); font-weight: 500; }
.article-byline-meta { color: var(--surface-fg-subtle); }

/* Article body: light reading surface */
.article-body {
  background: var(--color-white);
  color: var(--color-ink-700);
  padding: 4rem 0;
}
.article-body .article-container { color: var(--color-ink-600); }
.article-body p {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-ink-600);
  margin-bottom: 1.5rem;
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-navy);
  margin: 3rem 0 1rem;
  line-height: 1.2;
}
.article-body h3 {
  font-family: var(--font-display);
  font-size: 1.3125rem;
  font-weight: 500;
  color: var(--color-navy);
  margin: 2.25rem 0 0.75rem;
}
.article-body ul, .article-body ol { margin: 0 0 1.5rem 1.25rem; }
.article-body li { font-size: 1.0625rem; line-height: 1.7; color: var(--color-ink-600); margin-bottom: 0.5rem; }
.article-body a { color: var(--color-cobalt); text-decoration: underline; text-underline-offset: 2px; }
.article-body blockquote {
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  border-left: 3px solid var(--color-cobalt);
  background: var(--color-mist);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-ink-700);
}
.article-body pre {
  margin: 1.75rem 0;
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--color-navy);
  color: var(--color-ink-100);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: auto;
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-mist);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  color: var(--color-ink-700);
}
.article-body pre code { background: none; padding: 0; color: inherit; }
.article-rule {
  border: none;
  height: 1px;
  background: var(--color-stone);
  margin: 2.5rem 0;
}
.article-figure { margin: 2.5rem 0; }
.article-figure-caption {
  margin-top: 0.75rem;
  font-size: var(--text-sm);
  color: var(--color-ink-400);
  text-align: center;
}