/* ============================================================
   Jose Hernandez Blog — main.css
   Dark navy palette · Inter typeface · Animated gradient accent
   ============================================================ */

/* ── 1. DESIGN TOKENS ──────────────────────────────────────── */
:root {
  /* Palette */
  --color-bg:         #243448;
  --color-surface:    #1C2D3E;
  --color-border:     #3A5170;
  --color-text:       #E8EDF2;
  --color-text-muted: #7A95AB;
  --color-accent:     #5BB8D4;

  /* Gradient stops */
  --gradient-start:   #5BB8D4;
  --gradient-mid:     #2A7BA0;
  --gradient-end:     #1A6FA5;

  /* Typography */
  --font-family:      'Inter', system-ui, -apple-system, sans-serif;
  --weight-regular:   400;
  --weight-medium:    500;
  --weight-semibold:  600;
  --weight-bold:      700;
  --weight-black:     900;

  /* Spacing scale */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4rem;
  --space-4xl:  6rem;

  /* Shape */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-pill: 9999px;

  /* Layout */
  --max-width-content: 720px;
  --max-width-site:    1200px;
  --nav-height:        64px;

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ── 2. RESET & BASE ───────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-weight: var(--weight-regular);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.8;
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── 3. TYPOGRAPHY ─────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-black);
  line-height: 1.15;
  color: var(--color-text);
}

p {
  line-height: 1.7;
}

/* ── 4. GRADIENT ANIMATION ─────────────────────────────────── */
@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.gradient-text {
  background: linear-gradient(
    135deg,
    var(--gradient-start),
    var(--gradient-mid),
    var(--gradient-end),
    var(--gradient-mid),
    var(--gradient-start)
  );
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  animation: gradient-shift 32s ease infinite;
  display: inline;
}

/* ── 5. LAYOUT UTILITIES ───────────────────────────────────── */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1;
}

/* Shared inner container — centers content with side padding */
.nav-inner,
.hero-inner,
.section-inner,
.list-hero-inner,
.post-header-inner,
.post-body,
.post-footer-inner,
.footer-inner {
  max-width: var(--max-width-site);
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

/* Prose width capped narrower for readability */
.post-content {
  max-width: var(--max-width-content);
}

/* ── 6. NAV ────────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.nav-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.nav-logo {
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-text {
  font-family: var(--font-family);
  font-weight: var(--weight-semibold);
  font-size: 1.125rem;
  letter-spacing: 0.01em;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav-logo:hover .nav-logo-text {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.nav-link {
  font-weight: var(--weight-medium);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
  padding-block: var(--space-xs);
}

.nav-link:hover {
  color: var(--color-text);
  opacity: 1;
}

.nav-link--active {
  color: var(--color-accent);
  opacity: 1;
}

/* ── 7. HERO ───────────────────────────────────────────────── */
.hero {
  padding-block: var(--space-4xl) var(--space-3xl);
  border-bottom: 1px solid var(--color-border);
}

.hero-heading {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: var(--weight-black);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-block: var(--space-md) var(--space-xl);
}

.hero-body {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 48ch;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background-color: var(--color-accent);
  color: var(--color-surface);
  font-weight: var(--weight-semibold);
  font-size: 0.9375rem;
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-pill);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.cta-button:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ── 8. EYEBROW LABEL (shared) ─────────────────────────────── */
.eyebrow-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

/* ── 9. SECTION / POSTS GRID ───────────────────────────────── */
.posts-section {
  padding-block: var(--space-3xl);
}

.section-header {
  margin-bottom: var(--space-2xl);
}

.section-heading {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: var(--weight-black);
  line-height: 1.2;
  margin-top: var(--space-xs);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.section-footer {
  margin-top: var(--space-2xl);
  text-align: center;
}

.view-all-link {
  font-weight: var(--weight-medium);
  font-size: 0.9375rem;
  color: var(--color-accent);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: opacity var(--transition-fast);
}

.view-all-link:hover {
  opacity: 0.75;
}

/* ── 10. POST CARD ─────────────────────────────────────────── */
.post-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.post-card-inner {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  height: 100%;
}

.post-card-eyebrow {
  margin-bottom: calc(var(--space-xs) * -1);
}

.post-card-title {
  font-size: 1.25rem;
  font-weight: var(--weight-black);
  line-height: 1.25;
  margin: 0;
}

.post-card-link {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.post-card-link:hover {
  color: var(--color-accent);
  opacity: 1;
}

.post-card-summary {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
  flex-wrap: wrap;
  margin-top: auto;
}

.post-card-sep {
  color: var(--color-border);
}

.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

/* ── 11. LIST PAGE ─────────────────────────────────────────── */
.list-hero {
  padding-block: var(--space-3xl) var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
}

.list-heading {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: var(--weight-black);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-top: var(--space-md);
}

.list-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: var(--space-lg);
  max-width: 52ch;
  line-height: 1.7;
}

.empty-state {
  color: var(--color-text-muted);
  text-align: center;
  padding-block: var(--space-3xl);
  font-size: 1rem;
}

/* ── 12. SINGLE POST ───────────────────────────────────────── */
.post-single {
  padding-bottom: var(--space-4xl);
}

.post-header {
  padding-block: var(--space-3xl) var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-3xl);
}

.post-title {
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: var(--weight-black);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-block: var(--space-md) var(--space-lg);
}

.post-description {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 60ch;
  margin-bottom: var(--space-xl);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
  flex-wrap: wrap;
}

.post-meta-sep {
  color: var(--color-border);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

/* Post body centering wrapper */
.post-body {
  max-width: var(--max-width-site);
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

/* Prose styles for rendered Markdown */
.post-content {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
}

.post-content h2 {
  font-size: 1.75rem;
  font-weight: var(--weight-black);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  line-height: 1.2;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-sm);
}

.post-content h3 {
  font-size: 1.25rem;
  font-weight: var(--weight-bold);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.post-content p {
  margin-bottom: var(--space-lg);
}

.post-content p:last-child {
  margin-bottom: 0;
}

.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-content a:hover {
  opacity: 0.8;
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.post-content li {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-lg);
  margin-block: var(--space-xl);
  color: var(--color-text-muted);
  font-style: italic;
}

.post-content strong {
  font-weight: var(--weight-semibold);
  color: var(--color-text);
}

.post-content em {
  font-style: italic;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-2xl);
}

/* Tables — scrolling and border-radius live on the wrapper div  */
/* (injected by render-table.html hook); the table itself stays  */
/* as display:table so border-collapse works correctly.           */
.post-content .table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-block: var(--space-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow-y: hidden; /* clips the border-radius at the corners */
}

.post-content table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.post-content thead {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-accent);
}

.post-content thead th {
  padding: var(--space-sm) var(--space-lg);
  text-align: left;
  font-weight: var(--weight-semibold);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  white-space: nowrap;
}

.post-content tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
}

.post-content tbody tr:last-child {
  border-bottom: none;
}

.post-content tbody tr:nth-child(even) {
  background-color: color-mix(in srgb, var(--color-surface) 50%, transparent);
}

.post-content tbody tr:hover {
  background-color: color-mix(in srgb, var(--color-accent) 6%, transparent);
}

.post-content td {
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-text);
  vertical-align: top;
  line-height: 1.6;
  min-width: 120px;
}

/* First column is a row label — de-emphasize and prevent wrapping */
.post-content td:first-child {
  white-space: nowrap;
  min-width: 0;
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
}

/* Inline code inside table cells — keep it compact */
.post-content td code,
.post-content th code {
  font-size: 0.8125em;
  padding: 0.1em 0.35em;
}

/* Inline code */
.post-content code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  font-size: 0.875em;
  background-color: var(--color-surface);
  color: var(--color-accent);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* Code blocks */
.post-content pre {
  background-color: var(--color-surface) !important;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  overflow-x: auto;
  margin-block: var(--space-xl);
}

.post-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.875rem;
  color: var(--color-text);
  border-radius: 0;
}

/* Hugo Chroma highlight wrapper */
.post-content .highlight {
  margin-block: var(--space-xl);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.post-content .highlight pre {
  margin: 0;
  border: none;
  border-radius: 0;
}

/* Post footer */
.post-footer {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.post-back-link {
  font-size: 0.9375rem;
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.post-back-link:hover {
  color: var(--color-accent);
  opacity: 1;
}

/* ── 13. PAGINATION ────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.pagination-link {
  font-weight: var(--weight-medium);
  font-size: 0.9375rem;
  color: var(--color-accent);
  text-decoration: none;
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.pagination-link:hover {
  border-color: var(--color-accent);
  background-color: var(--color-bg);
  opacity: 1;
}

.pagination-info {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
}

/* ── 14. FOOTER ────────────────────────────────────────────── */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-2xl);
  margin-top: auto;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.footer-logo {
  font-weight: var(--weight-semibold);
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--color-text);
  display: block;
  margin-bottom: var(--space-xs);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0;
}

.footer-link {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent);
  opacity: 1;
}

/* ── 15. TAG PILLS ─────────────────────────────────────────── */
.tag-pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: var(--weight-medium);
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.2em 0.75em;
  text-decoration: none;
  line-height: 1.5;
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.tag-pill:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  opacity: 1;
}

/* ── 16. SYNTAX HIGHLIGHTING ───────────────────────────────── */
/* syntax.css supplies all token colors; only override the background
   so it matches the brand surface instead of Dracula's #282a36      */
.post-content .chroma {
  background-color: var(--color-surface) !important;
  color: #f8f8f2; /* Dracula foreground — keep readable on our bg */
}

/* ── 17. MERMAID DIAGRAMS ──────────────────────────────────── */
.post-content pre.mermaid {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-block: var(--space-xl);
  display: flex;
  justify-content: center;
  overflow-x: auto;
}

/* Mermaid injects an <svg> — make it responsive */
.post-content pre.mermaid svg {
  max-width: 100%;
  height: auto;
}

/* ── 17. RESPONSIVE ────────────────────────────────────────── */
@media (max-width: 768px) {
  .posts-grid {
    grid-template-columns: 1fr;
  }

  .hero-heading {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .list-heading {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .post-title {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
  }

  .nav-inner,
  .hero-inner,
  .section-inner,
  .list-hero-inner,
  .post-header-inner,
  .post-body,
  .post-footer-inner,
  .footer-inner {
    padding-inline: var(--space-lg);
  }

  .post-header {
    padding-block: var(--space-2xl) var(--space-xl);
    margin-bottom: var(--space-2xl);
  }

  .hero {
    padding-block: var(--space-3xl) var(--space-2xl);
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: var(--space-md);
  }

  .nav-link {
    font-size: 0.8125rem;
  }

  .post-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .post-meta-sep {
    display: none;
  }

  .pagination {
    gap: var(--space-md);
    flex-wrap: wrap;
  }

  .hero-body {
    font-size: 1rem;
  }
}