h1{ color: midnightblue; }
/* ── Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* top EJS */
/* ══════════════════════════════════════════════════════════
   @import must be first — before any other rules
   ══════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@600;700;800&display=swap');

/* ── Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design Tokens ────────────────────────────────────── */
:root {
  /* Cyan palette */
  --cyan-100: #cffafe;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --cyan-600: #0777a0;  /* darkened from #0891b2 → 4.6:1 on white ✓ WCAG AA */
  --cyan-900: #083344;

  /* Neutrals */
  --ink:      #0a1628;  /* 16.5:1 on white ✓ */
  --body-text:#1a3a4a;  /* 10.2:1 on white ✓ */
  --nav-text: #3d6678;  /* 5.1:1 on white  ✓  replaces failing --muted */
  --surface:  #f0fbff;
  --white:    #ffffff;
  --border:   #9dd8ea;  /* slightly darker for 3:1 non-text UI contrast ✓ */

  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 6px;
}

/* ── Smooth scroll — only when motion is OK ──────────── */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

html { font-size: 16px; }

body {
  font-family: 'DM Mono', monospace;
  background-color: var(--surface);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto 1fr;
}

/* ── Skip-to-content (keyboard + screen reader users) ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5rem 1.25rem;
  background: var(--cyan-900);
  color: var(--white);
  font-family: 'Syne', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none;
  z-index: 9999;
  transition: top 150ms ease;
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--cyan-400);
  outline-offset: 2px;
}

/* ── Header ───────────────────────────────────────────── */
header {
  background: var(--cyan-900);
  padding: 2rem 2.5rem;
  border-bottom: 3px solid var(--cyan-400);
  position: relative;
  overflow: hidden;
}

header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(34,211,238,0.15) 0%, transparent 65%);
  pointer-events: none;
}

header h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--white);          /* 16.1:1 on --cyan-900 ✓ */
  letter-spacing: -0.02em;
  line-height: 1.2;
  position: relative;
}

/*
  content: '// ' / '' — the slash sets the CSS alt text to empty,
  so assistive tech skips the decorative slashes (CSS spec §2.2).
*/
header h1::before {
  content: ' '  '';
  color: var(--cyan-400);
  font-weight: 400;
}

/* ── Nav ──────────────────────────────────────────────── */
nav {
  background: var(--white);
  border-bottom: 2px solid var(--border);
  padding: 0 2.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 16px rgba(6,182,212,0.09);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 0;
}

nav ul li a {
  display: block;
  padding: 1rem 1.25rem;
  text-decoration: none;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--nav-text);       /* 5.1:1 on white ✓ WCAG AA */
  position: relative;
  /* Base transition — color only; motion extras added below */
  transition: color 200ms var(--ease-standard);
}

/* Animated underline draws in from left */
nav ul li a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400), var(--cyan-500));
  border-radius: 2px 2px 0 0;
  transform: scaleX(0);
  transform-origin: left center;
}

nav ul li a:hover {
  color: var(--cyan-600);       /* 4.6:1 on white ✓ WCAG AA */
}

nav ul li a:hover::after {
  transform: scaleX(1);
}

/* Reverse wipe on leave */
nav ul li a:not(:hover):not(:focus-visible)::after {
  transform-origin: right center;
}

/*
  Focus-visible uses outline (not box-shadow) so it survives
  Windows High Contrast / forced-colors mode.
*/
nav ul li a:focus-visible {
  color: var(--cyan-600);
  outline: 3px solid var(--cyan-500);
  outline-offset: -3px;
  border-radius: 3px 3px 0 0;
}

nav ul li a:focus-visible::after {
  transform: scaleX(1);
}

/* Lift + glow + underline transition — only when motion is OK */
@media (prefers-reduced-motion: no-preference) {
  nav ul li a {
    transition: color 200ms var(--ease-standard),
                transform 200ms var(--ease-standard),
                text-shadow 200ms var(--ease-standard);
  }

  nav ul li a::after {
    transition: transform 250ms var(--ease-standard);
  }

  nav ul li a:hover,
  nav ul li a:focus-visible {
    transform: translateY(-2px);
    text-shadow: 0 0 16px rgba(7,119,160,0.28);
  }
}

/* ── Global focus ring ────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--cyan-500);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Content ──────────────────────────────────────────── */
#content {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 2.5rem;
  width: 100%;
}

/* ── Typography ───────────────────────────────────────── */
h2, h3, h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  color: var(--cyan-900);       /* 12.5:1 on white ✓ */
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

h2 { font-size: 1.75rem; }
h3 { font-size: 1.35rem; }

p {
  margin-bottom: 1.25rem;
  color: var(--body-text);      /* 10.2:1 on white ✓ */
  max-width: 72ch;              /* optimal reading measure */
}

/* Underline always visible — satisfies WCAG 1.4.1 (use of color) */
a {
  color: var(--cyan-600);       /* 4.6:1 on white ✓ */
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 150ms ease;
}
a:hover {
  color: var(--cyan-900);
  text-decoration-thickness: 2px;
}

/* ── Code / Prism overrides ───────────────────────────── */
pre[class*="language-"] {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(6,182,212,0.07);
  overflow-x: auto;             /* scrollable, not clipped */
}

code:not([class*="language-"]) {
  background: var(--cyan-100);
  color: var(--cyan-900);       /* 12.5:1 on --cyan-100 ✓ */
  padding: 0.1em 0.45em;
  border-radius: 3px;
  font-size: 0.88em;
  white-space: nowrap;
}

/* ── Windows High Contrast / Forced Colors ───────────── */
@media (forced-colors: active) {
  nav ul li a::after   { background: Highlight; }
  header               { border-bottom-color: Highlight; }
  header h1::before    { color: Highlight; }
  a                    { color: LinkText; }
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 640px) {
  header,
  nav,
  #content {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  /* WCAG 2.5.8 — minimum 44×44px touch target */
  nav ul li a {
    padding: 0;
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    padding: 0 0.9rem;
    font-size: 0.8rem;
  }
}

/*Bottom EJS*/

/* ══════════════════════════════════════════════════════════
   @import must come first
   ══════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@600;700;800&display=swap');

/* ── Reset ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design Tokens ────────────────────────────────────── */
:root {
  /* Cyan palette */
  --cyan-100: #cffafe;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --cyan-600: #0777a0;    /* 4.6:1 on white ✓ WCAG AA */
  --cyan-900: #083344;

  /* Text */
  --ink:       #0a1628;   /* 16.5:1 on white ✓ */
  --body-text: #1a3a4a;   /* 10.2:1 on white ✓ */
  --nav-text:  #3d6678;   /*  5.1:1 on white ✓ */

  /* Surfaces */
  --surface:   #f0fbff;
  --white:     #ffffff;
  --border:    #9dd8ea;   /* 3:1 on white for UI components ✓ */

  /* Spacing scale (4px base) */
  --space-1:  0.25rem;   /*  4px */
  --space-2:  0.5rem;    /*  8px */
  --space-3:  0.75rem;   /* 12px */
  --space-4:  1rem;      /* 16px */
  --space-5:  1.25rem;   /* 20px */
  --space-6:  1.5rem;    /* 24px */
  --space-8:  2rem;      /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */

  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 6px;
}

/* ── Smooth scroll — motion-safe only ────────────────── */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

html { font-size: 16px; }

body {
  font-family: 'DM Mono', monospace;
  background-color: var(--surface);
  color: var(--ink);
  line-height: 1.7;
  min-height: 100vh;
  /* header / nav / content / footer */
  display: grid;
  grid-template-rows: auto auto 1fr auto;
}

/* ── Skip-to-content ──────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-5);
  background: var(--cyan-900);
  color: var(--white);
  font-family: 'Syne', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
  z-index: 9999;
  transition: top 150ms ease;
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--cyan-400);
  outline-offset: 2px;
}

/* ── Header ───────────────────────────────────────────── */
header {
  background: var(--cyan-900);
  padding: var(--space-8) var(--space-10);
  border-bottom: 3px solid var(--cyan-400);
  position: relative;
  overflow: hidden;
}

/* Decorative glow — invisible to assistive tech */
header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(34,211,238,0.14) 0%, transparent 60%);
  pointer-events: none;
}

header h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--white);            /* 16.1:1 on --cyan-900 ✓ */
  letter-spacing: -0.025em;
  line-height: 1.2;
  position: relative;             /* above ::after glow */
}

/*
  CSS alt text trick: content: '…' / ''
  The slash makes the alt text empty so screen readers skip
  the decorative slashes entirely (CSS Generated Content spec §2.2).
*/
header h1::before {
  content: ' '  '';
  color: var(--cyan-400);
  font-weight: 400;
}

/* ── Nav ──────────────────────────────────────────────── */
nav {
  background: var(--white);
  border-bottom: 2px solid var(--border);
  padding: 0 var(--space-10);
  position: sticky;
  top: 0;
  z-index: 100;
  /* Thin shadow reinforces the sticky elevation without being heavy */
  box-shadow: 0 2px 20px rgba(8,51,68,0.07);
}

nav ul {
  list-style: none;
  display: flex;
}

nav ul li a {
  display: block;
  padding: var(--space-4) var(--space-5);
  text-decoration: none;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.8125rem;           /* 13px — crisp at this weight */
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--nav-text);         /* 5.1:1 on white ✓ WCAG AA */
  position: relative;
  transition: color 200ms var(--ease-standard);
}

/* Animated underline — draws in from left, wipes out to right */
nav ul li a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400), var(--cyan-500));
  border-radius: 2px 2px 0 0;
  transform: scaleX(0);
  transform-origin: left center;
}

nav ul li a:not(:hover):not(:focus-visible)::after {
  transform-origin: right center;
}

nav ul li a:hover {
  color: var(--cyan-600);         /* 4.6:1 on white ✓ WCAG AA */
}

nav ul li a:hover::after,
nav ul li a:focus-visible::after {
  transform: scaleX(1);
}

/*
  Solid outline for focus — survives Windows High Contrast mode.
  box-shadow alone does not.
*/
nav ul li a:focus-visible {
  color: var(--cyan-600);
  outline: 3px solid var(--cyan-500);
  outline-offset: -3px;
  border-radius: 3px 3px 0 0;
}

/* Lift + glow — only when the user is OK with motion */
@media (prefers-reduced-motion: no-preference) {
  nav ul li a {
    transition: color 200ms var(--ease-standard),
                transform 200ms var(--ease-standard),
                text-shadow 200ms var(--ease-standard);
  }

  nav ul li a::after {
    transition: transform 260ms var(--ease-standard);
  }

  nav ul li a:hover,
  nav ul li a:focus-visible {
    transform: translateY(-2px);
    text-shadow: 0 0 16px rgba(7,119,160,0.25);
  }
}

/* ── Global focus ring ────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--cyan-500);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Content ──────────────────────────────────────────── */
#content {
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-12) var(--space-10);
}

/* ── Typography ───────────────────────────────────────── */
h2, h3, h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  color: var(--cyan-900);         /* 12.5:1 on white ✓ */
  letter-spacing: -0.02em;
  line-height: 1.25;
}

/* Breathing room above headings when they follow content */
* + h2 { margin-top: var(--space-10); }
* + h3 { margin-top: var(--space-8);  }
* + h4 { margin-top: var(--space-6);  }

h2 { font-size: 1.75rem;  margin-bottom: var(--space-4); }
h3 { font-size: 1.3125rem; margin-bottom: var(--space-3); }
h4 { font-size: 1.0625rem; margin-bottom: var(--space-2); }

p {
  margin-bottom: var(--space-5);
  color: var(--body-text);        /* 10.2:1 on white ✓ */
  max-width: 72ch;                /* ~65–75ch is the optimal reading measure */
}

/* Links — underline always present, not just on hover (WCAG 1.4.1) */
a {
  color: var(--cyan-600);         /* 4.6:1 on white ✓ */
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 150ms ease, text-decoration-thickness 150ms ease;
}
a:hover {
  color: var(--cyan-900);
  text-decoration-thickness: 2px;
}

/* Lists */
ul, ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
  color: var(--body-text);
}
li { margin-bottom: var(--space-1); }

/* Horizontal rule */
hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-10) 0;
}

/* ── Code / Prism overrides ───────────────────────────── */
pre[class*="language-"] {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(8,51,68,0.06);
  overflow-x: auto;
  margin-bottom: var(--space-5);
}

code:not([class*="language-"]) {
  background: var(--cyan-100);
  color: var(--cyan-900);         /* 12.5:1 on --cyan-100 ✓ */
  padding: 0.125em 0.4em;
  border-radius: 3px;
  font-size: 0.875em;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
  background: var(--cyan-900);
  border-top: 3px solid var(--cyan-400);
  padding: var(--space-6) var(--space-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  position: relative;
  overflow: hidden;
  /* Typography */
  font-family: 'Syne', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan-100);         /* 11.4:1 on --cyan-900 ✓ */
}

/* Decorative glow — mirrors header, flipped to left */
footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 15% 50%, rgba(34,211,238,0.11) 0%, transparent 60%);
  pointer-events: none;
}

/* Keep text above the pseudo-element glow */
footer > * { position: relative; }

/* Copyright — softer weight so the site name leads */
footer span {
  font-weight: 400;
  letter-spacing: 0.02em;
  opacity: 0.72;
}

/* ── Windows High Contrast / Forced Colors ───────────── */
@media (forced-colors: active) {
  header               { border-bottom-color: Highlight; }
  header h1::before    { color: Highlight; }
  nav ul li a::after   { background: Highlight; }
  footer               { border-top-color: Highlight; }
  footer, footer span  { color: ButtonText; opacity: 1; }
  a                    { color: LinkText; }
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 640px) {
  header,
  nav,
  #content,
  footer {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }

  #content {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    padding-top: var(--space-5);
    padding-bottom: var(--space-5);
  }

  /* WCAG 2.5.8 — minimum 44px touch target height */
  nav ul li a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    font-size: 0.8rem;
  }
}

/* blog list EJS */
/* ══════════════════════════════════════════════════════════
   @import must come first
   ══════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@600;700;800&display=swap');

/* ── Reset ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design Tokens ────────────────────────────────────── */
:root {
  /* Cyan palette */
  --cyan-100: #cffafe;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --cyan-600: #0777a0;    /* 4.6:1 on white ✓ WCAG AA */
  --cyan-900: #083344;

  /* Text */
  --ink:       #0a1628;   /* 16.5:1 on white ✓ */
  --body-text: #1a3a4a;   /* 10.2:1 on white ✓ */
  --nav-text:  #3d6678;   /*  5.1:1 on white ✓ */

  /* Surfaces */
  --surface:   #f0fbff;
  --white:     #ffffff;
  --border:    #9dd8ea;   /* 3:1 on white for UI components ✓ */

  /* Spacing scale (4px base) */
  --space-1:  0.25rem;   /*  4px */
  --space-2:  0.5rem;    /*  8px */
  --space-3:  0.75rem;   /* 12px */
  --space-4:  1rem;      /* 16px */
  --space-5:  1.25rem;   /* 20px */
  --space-6:  1.5rem;    /* 24px */
  --space-8:  2rem;      /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */

  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 6px;
}

/* ── Smooth scroll — motion-safe only ────────────────── */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

html { font-size: 16px; }

body {
  font-family: 'DM Mono', monospace;
  background-color: var(--surface);
  color: var(--ink);
  line-height: 1.7;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
}

/* ── Skip-to-content ──────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-5);
  background: var(--cyan-900);
  color: var(--white);
  font-family: 'Syne', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
  z-index: 9999;
  transition: top 150ms ease;
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--cyan-400);
  outline-offset: 2px;
}

/* ── Header ───────────────────────────────────────────── */
header {
  background: var(--cyan-900);
  padding: var(--space-8) var(--space-10);
  border-bottom: 3px solid var(--cyan-400);
  position: relative;
  overflow: hidden;
}

header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(34,211,238,0.14) 0%, transparent 60%);
  pointer-events: none;
}

header h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--white);            /* 16.1:1 on --cyan-900 ✓ */
  letter-spacing: -0.025em;
  line-height: 1.2;
  position: relative;
}

/*
  content: '// ' / '' — slash sets CSS alt text to empty string
  so screen readers skip the decorative slashes (CSS spec §2.2).
*/
header h1::before {
  content: ' '  '';
  color: var(--cyan-400);
  font-weight: 400;
}

/* ── Nav ──────────────────────────────────────────────── */
nav {
  background: var(--white);
  border-bottom: 2px solid var(--border);
  padding: 0 var(--space-10);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 20px rgba(8,51,68,0.07);
}

nav ul {
  list-style: none;
  display: flex;
}

nav ul li a {
  display: block;
  padding: var(--space-4) var(--space-5);
  text-decoration: none;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--nav-text);         /* 5.1:1 on white ✓ WCAG AA */
  position: relative;
  transition: color 200ms var(--ease-standard);
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400), var(--cyan-500));
  border-radius: 2px 2px 0 0;
  transform: scaleX(0);
  transform-origin: left center;
}

nav ul li a:not(:hover):not(:focus-visible)::after {
  transform-origin: right center;
}

nav ul li a:hover {
  color: var(--cyan-600);         /* 4.6:1 on white ✓ WCAG AA */
}

nav ul li a:hover::after,
nav ul li a:focus-visible::after {
  transform: scaleX(1);
}

nav ul li a:focus-visible {
  color: var(--cyan-600);
  outline: 3px solid var(--cyan-500);
  outline-offset: -3px;
  border-radius: 3px 3px 0 0;
}

@media (prefers-reduced-motion: no-preference) {
  nav ul li a {
    transition: color 200ms var(--ease-standard),
                transform 200ms var(--ease-standard),
                text-shadow 200ms var(--ease-standard);
  }
  nav ul li a::after {
    transition: transform 260ms var(--ease-standard);
  }
  nav ul li a:hover,
  nav ul li a:focus-visible {
    transform: translateY(-2px);
    text-shadow: 0 0 16px rgba(7,119,160,0.25);
  }
}

/* ── Global focus ring ────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--cyan-500);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Content ──────────────────────────────────────────── */
#content {
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-12) var(--space-10);
}

/* ── Typography ───────────────────────────────────────── */
h2, h3, h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  color: var(--cyan-900);         /* 12.5:1 on white ✓ */
  letter-spacing: -0.02em;
  line-height: 1.25;
}

* + h2 { margin-top: var(--space-10); }
* + h3 { margin-top: var(--space-8);  }
* + h4 { margin-top: var(--space-6);  }

h2 { font-size: 1.75rem;   margin-bottom: var(--space-4); }
h3 { font-size: 1.3125rem; margin-bottom: var(--space-3); }
h4 { font-size: 1.0625rem; margin-bottom: var(--space-2); }

p {
  margin-bottom: var(--space-5);
  color: var(--body-text);        /* 10.2:1 on white ✓ */
  max-width: 72ch;
}

a {
  color: var(--cyan-600);         /* 4.6:1 on white ✓ */
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 150ms ease, text-decoration-thickness 150ms ease;
}
a:hover {
  color: var(--cyan-900);
  text-decoration-thickness: 2px;
}

ul, ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
  color: var(--body-text);
}
li { margin-bottom: var(--space-1); }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-10) 0;
}

/* ── Code / Prism overrides ───────────────────────────── */
pre[class*="language-"] {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(8,51,68,0.06);
  overflow-x: auto;
  margin-bottom: var(--space-5);
}

code:not([class*="language-"]) {
  background: var(--cyan-100);
  color: var(--cyan-900);         /* 12.5:1 on --cyan-100 ✓ */
  padding: 0.125em 0.4em;
  border-radius: 3px;
  font-size: 0.875em;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
  background: var(--cyan-900);
  border-top: 3px solid var(--cyan-400);
  padding: var(--space-6) var(--space-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  position: relative;
  overflow: hidden;
  font-family: 'Syne', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan-100);         /* 11.4:1 on --cyan-900 ✓ */
}

footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 15% 50%, rgba(34,211,238,0.11) 0%, transparent 60%);
  pointer-events: none;
}

footer > * { position: relative; }

footer span {
  font-weight: 400;
  letter-spacing: 0.02em;
  opacity: 0.72;
}

/* ── Main / Blog page ─────────────────────────────────── */
/*
  <main> is a direct child of <body>, outside #content,
  so it needs its own layout constraints.
*/
main {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-10);
}

main > h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  color: var(--cyan-900);         /* 12.5:1 on white ✓ */
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-5);
  border-bottom: 2px solid var(--border);
  position: relative;
}

/* Short cyan accent bar — same gradient language as nav underline */
main > h1::after {
  content: ''  '';               /* alt text: empty — purely decorative */
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 3rem;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400), var(--cyan-500));
  border-radius: 2px;
}

/* ── Blog Post List ───────────────────────────────────── */
main > ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* ── Post Card ────────────────────────────────────────── */
main > ul > li {
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--cyan-400);
  border-radius: var(--radius);
  padding: var(--space-6) var(--space-8);
  margin-bottom: 0;
  /* Shadow transition is safe — no vestibular impact */
  transition: box-shadow 220ms var(--ease-standard),
              border-left-color 220ms var(--ease-standard);
  box-shadow: 0 1px 4px rgba(8,51,68,0.05);
}

/* Card lift only for users who are OK with motion */
@media (prefers-reduced-motion: no-preference) {
  main > ul > li {
    transition: box-shadow 220ms var(--ease-standard),
                border-left-color 220ms var(--ease-standard),
                transform 220ms var(--ease-standard);
  }
  main > ul > li:hover {
    transform: translateY(-2px);
  }
}

main > ul > li:hover {
  box-shadow: 0 4px 20px rgba(8,51,68,0.10);
  border-left-color: var(--cyan-500);
}

/* Post title link */
main > ul > li > a {
  display: inline-block;
  font-family: 'Syne', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--cyan-900);         /* 12.5:1 on white ✓ */
  text-decoration: none;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: var(--space-3);
  /* Draw-in underline — mirrors nav animation */
  background-image: linear-gradient(var(--cyan-500), var(--cyan-500));
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: left bottom;
  /* Color transition is always safe */
  transition: color 180ms var(--ease-standard);
}

/* Underline animation only when motion is OK */
@media (prefers-reduced-motion: no-preference) {
  main > ul > li > a {
    transition: color 180ms var(--ease-standard),
                background-size 250ms var(--ease-standard);
  }
}

main > ul > li > a:hover,
main > ul > li > a:focus-visible {
  color: var(--cyan-600);         /* 4.6:1 on white ✓ */
  background-size: 100% 2px;
}

main > ul > li > a:focus-visible {
  outline: 3px solid var(--cyan-500);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Post description */
main > ul > li > p:nth-of-type(1) {
  font-size: 0.9375rem;
  color: var(--body-text);        /* 10.2:1 on white ✓ */
  line-height: 1.65;
  margin-bottom: var(--space-4);
  max-width: 68ch;
}

/* Meta row — author + date rendered inline */
main > ul > li > p:nth-of-type(2),
main > ul > li > p:nth-of-type(3) {
  display: inline;
  font-size: 0.8125rem;
  color: var(--nav-text);         /* 5.1:1 on white ✓ */
  font-family: 'DM Mono', monospace;
  font-weight: 400;
  margin-bottom: 0;
  max-width: none;
}

/*
  Bullet separator injected between author and date.
  content: '·' / '' — alt text empty so AT reads
  "Author Name Published Date" not "Author Name · Published Date"
*/
main > ul > li > p:nth-of-type(2)::after {
  content: ' · '  '';
  opacity: 0.45;
}

/* ── Windows High Contrast / Forced Colors ───────────── */
@media (forced-colors: active) {
  header                     { border-bottom-color: Highlight; }
  header h1::before          { color: Highlight; }
  nav ul li a::after         { background: Highlight; }
  footer                     { border-top-color: Highlight; }
  footer, footer span        { color: ButtonText; opacity: 1; }
  a                          { color: LinkText; }
  main > h1::after           { background: Highlight; }
  main > ul > li             { border-left-color: Highlight; border-color: ButtonText; }
  main > ul > li > a         { color: LinkText; background-image: none; }
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 640px) {
  header,
  nav,
  #content,
  main,
  footer {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }

  #content,
  main {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    padding-top: var(--space-5);
    padding-bottom: var(--space-5);
  }

  /* WCAG 2.5.8 — minimum 44px touch target */
  nav ul li a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    font-size: 0.8rem;
  }

  main > ul > li {
    padding: var(--space-5);
  }

  /* Stack meta on very small screens */
  main > ul > li > p:nth-of-type(2),
  main > ul > li > p:nth-of-type(3) {
    display: block;
  }

  main > ul > li > p:nth-of-type(2)::after {
    content: none;
  }
}

/* blog-posts EJS */
/* ══════════════════════════════════════════════════════════
   BLOG POST PAGE — post.css
   Targets the EJS structure exactly as written:

   <main>
     <h1>         — post title
     <p>          — description / standfirst
     <p>          — author + published date
     <%- content %> — article body (raw HTML)
   </main>

   Drop this AFTER main.css in your <head>:
   <link rel="stylesheet" href="/css/post.css">
   ══════════════════════════════════════════════════════════ */

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   POST TITLE
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
main > h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.875rem, 5vw, 2.75rem);
  font-weight: 800;
  color: var(--cyan-900);         /* 12.5:1 on white ✓ */
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--sp-4);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   DESCRIPTION — lead/standfirst paragraph
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
main > h1 + p {
  font-size: 1.125rem;
  color: var(--body-text);        /* 10.2:1 on white ✓ */
  line-height: 1.7;
  max-width: 60ch;
  margin-bottom: var(--sp-4);
  font-weight: 400;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   META ROW — author + published date
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
main > h1 + p + p {
  font-family: 'DM Mono', monospace;
  font-size: 0.8125rem;           /* 13px */
  color: var(--meta-text);        /* 5.1:1 on white ✓ WCAG AA */
  margin-bottom: 0;
  max-width: none;
  padding-bottom: var(--sp-8);
  border-bottom: 2px solid var(--border);
  position: relative;
}

/* Short cyan accent bar — same visual language as the rest of the site */
main > h1 + p + p::after {
  content: ''  ' ';             /* alt text: space — AT skips it ✓ */
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 3rem;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400), var(--cyan-500));
  border-radius: 2px;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   ARTICLE BODY — everything after the meta row
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
main > h1 + p + p + * {
  margin-top: var(--sp-8);
}

/* Headings inside post content */
main > h1 + p + p ~ h2,
main > h1 + p + p ~ h3,
main > h1 + p + p ~ h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  color: var(--cyan-900);         /* 12.5:1 on white ✓ */
  letter-spacing: -0.02em;
  line-height: 1.25;
}

main > h1 + p + p ~ h2 { font-size: 1.625rem; margin: var(--sp-10) 0 var(--sp-4); }
main > h1 + p + p ~ h3 { font-size: 1.25rem;  margin: var(--sp-8)  0 var(--sp-3); }
main > h1 + p + p ~ h4 { font-size: 1rem;     margin: var(--sp-6)  0 var(--sp-2); }

/* Body paragraphs — slightly more open line-height for long-form reading */
main > h1 + p + p ~ p {
  font-size: 1rem;
  color: var(--body-text);        /* 10.2:1 on white ✓ */
  line-height: 1.8;
  margin-bottom: var(--sp-5);
  max-width: 70ch;
}

/* Lists */
main > h1 + p + p ~ ul,
main > h1 + p + p ~ ol {
  padding-left: var(--sp-6);
  margin-bottom: var(--sp-5);
  color: var(--body-text);
}

main > h1 + p + p ~ ul li,
main > h1 + p + p ~ ol li {
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: var(--sp-2);
}

/* Blockquote */
main > h1 + p + p ~ blockquote {
  border-left: 4px solid var(--cyan-400);
  margin: var(--sp-8) 0;
  padding: var(--sp-4) var(--sp-6);
  background: var(--white);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: 0 1px 4px rgba(8,51,68,0.05);
}

main > h1 + p + p ~ blockquote p {
  font-size: 1.0625rem;
  font-style: italic;
  color: var(--meta-text);        /* 5.1:1 on white ✓ */
  margin-bottom: 0;
  max-width: none;
  line-height: 1.7;
}

/* Horizontal rule */
main > h1 + p + p ~ hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--sp-10) 0;
}

/* Images */
main > h1 + p + p ~ img,
main > h1 + p + p ~ p > img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
  margin: var(--sp-8) 0;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   FORCED COLORS / WINDOWS HIGH CONTRAST
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
@media (forced-colors: active) {
  main > h1 + p + p::after          { background: Highlight; }
  main > h1 + p + p ~ blockquote    { border-left-color: Highlight; }
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   RESPONSIVE
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
@media (max-width: 640px) {
  main > h1 + p + p ~ blockquote {
    padding: var(--sp-4);
  }
}

/* CSS for Icon formatting*/
nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 1rem;
}

nav ul li {
    display: flex;
    align-items: center;
    gap: 0.15rem;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 1rem;
}

nav ul li a:focus,
nav ul li a:hover {
    color: #1a73e8;
    outline: 3px solid var(--cyan-500);
    outline-offset: -3px;
}

nav ul li i {
    font-size: 1rem;
}

/* Validation messages for form inputs */
.validation {
  color: #b91c1c;
  font-weight: bold;
  margin-left: 5px;
  font-size: 0.9em;
}

/* Responsive behavior for small screens */
@media all and (max-width: 800px) {
  .validation {
    display: block;
    margin-left: 0;
    margin-top: 2px;
  }
}

/* Optional: add spacing between input and error */
input, textarea, select {
  display: block;
  margin-bottom: 5px;
}