/* ============================================================
   Britemind — style.css
   Sections:
     1. Custom properties (design tokens)
     2. Reset
     3. Base elements
     4. Layout
     5. Components
     6. Utilities
     7. Responsive
   ============================================================ */

/* ============================================================
   1. Custom properties
   ============================================================ */
:root {
  /* Colours */
  --color-bg:          #FAFAF8;
  --color-bg-warm:     #F2EBE1;   /* warm paper — footer, hero tint */
  --color-text:        #1A1A1A;
  --color-accent:      #2A6B6E;
  --color-accent-dark: #1D4E50;
  --color-accent-warm: #A0522D;   /* sienna — decorative touches only */
  --color-muted:       #6B6B6B;
  --color-border:      #E8E8E4;

  /* Footer palette — dark background, warm tones */
  --color-footer-bg:       #1A1A1A;
  --color-footer-text:     #9A9A8A;   /* warm grey on dark */
  --color-footer-quote:    #E8E4DC;   /* warm off-white */
  --color-footer-copy:     #5A5A4A;   /* dimmed copyright */

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Lora', Georgia, serif;

  /* Type scale */
  --size-xs:   0.75rem;
  --size-sm:   0.875rem;
  --size-md:   1rem;
  --size-lg:   1.25rem;
  --size-xl:   1.5rem;
  --size-2xl:  2rem;
  --size-3xl:  clamp(2rem, 5vw, 3.5rem);
  --size-hero: clamp(2.5rem, 6vw, 5rem);

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

  /* Layout */
  --measure:    68ch;
  --site-width: 1100px;

  /* Components */
  --logo-height:       40px;
  --btn-padding:       0.85rem 2.25rem;
  --about-img-width:   200px;
  --about-img-mobile:  160px;
  --prose-size:        1.075rem;
  --prose-color:       #2E2E2E;   /* slightly warmer than pure text for long-form reading */
}

/* ============================================================
   2. Reset
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
}

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

h1, h2, h3, h4 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

/* ============================================================
   3. Base elements
   ============================================================ */
body {
  font-family: var(--font-body);
  font-size: var(--size-md);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  animation: fadeIn 0.4s ease both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Staggered reveal for hero elements */
.hero h1 { animation: fadeIn 0.6s ease both; animation-delay: 0.05s; }
.hero p  { animation: fadeIn 0.6s ease both; animation-delay: 0.2s; }

h1 {
  font-family: var(--font-display); /* Playfair Display — reserved for h1 display headings */
  font-size: var(--size-3xl);
  font-weight: 700;
  line-height: 1.2;
  margin-block: 0 var(--space-md);
}

h2 {
  font-family: var(--font-body); /* Source Sans 3 — readable at section-heading size */
  font-size: var(--size-xl);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
  margin-block: var(--space-lg) var(--space-sm);
}

h3 {
  font-family: var(--font-body);
  font-size: var(--size-lg);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin-block: var(--space-md) var(--space-sm);
}

p {
  margin-block: 0 var(--space-md);
}

a {
  color: var(--color-accent);
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent-dark);
}

ul, ol {
  padding-inline-start: var(--space-lg);
}

blockquote {
  margin-inline: 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 3px solid var(--color-accent);
  color: var(--color-muted);
  font-style: italic;
}

blockquote p {
  margin: 0;
}

address {
  font-style: normal;
  line-height: 1.8;
}

time {
  font-size: var(--size-sm);
  color: var(--color-muted);
}

/* ============================================================
   4. Layout
   ============================================================ */

/* Body is the outermost grid — header, main, footer stack vertically */
body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

/* Constrain content width without a wrapper div */
main,
footer > * {
  max-width: var(--site-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
  width: 100%;
}

/* Header: logo left, nav right — manages its own layout directly */
header {
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-md);
  padding-inline: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  max-width: 100%;
}


.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo img {
  height: var(--logo-height);
  width: auto;
}

header nav {
  display: flex;
  gap: var(--space-lg);
  /* Override the header > * rule for the nav itself — no max-width needed here */
  max-width: none;
  margin-inline: 0;
  padding-inline: 0;
}

header nav a {
  font-size: var(--size-md);
  font-weight: 600;
  text-decoration: none;
  color: var(--color-text);
  transition: color 0.2s ease;
}

header nav a:hover {
  color: var(--color-accent);
}

header nav a[aria-current="page"] {
  color: var(--color-accent);
  font-weight: 600;
}

main {
  padding-block: var(--space-xl);
}

/* Pages with a full-bleed page-header or article header don't need top padding on main */
main:has(.page-header),
main:has(article > header) {
  padding-block-start: 0;
}

footer {
  background-color: var(--color-footer-bg);
  padding-block: var(--space-xl);
  padding-inline: var(--space-lg);
  font-size: var(--size-sm);
  color: var(--color-footer-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

.footer-inner {
  /* Wrapper required here: footer uses flex column, but content needs max-width constraint.
     Without this element, gap and align-items apply per-child and we lose the grouping. */
  max-width: var(--site-width);
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

footer .quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--size-lg);
  color: var(--color-footer-quote);
  max-width: 55ch;
  margin: 0 0 var(--space-md);
  text-align: center;
  line-height: 1.6;
}

footer nav.social {
  display: flex;
  gap: var(--space-md);
}

footer nav.social a {
  color: var(--color-footer-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  transition: color 0.2s ease;
}

footer nav.social a:hover {
  color: var(--color-footer-quote);
}

footer .copyright {
  margin: var(--space-sm) 0 0;
  font-size: var(--size-xs);
  color: var(--color-footer-copy);
  letter-spacing: 0.04em;
}

/* ============================================================
   5. Components
   ============================================================ */

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--color-bg-warm) 0%, var(--color-bg) 60%);
  margin-inline: calc(-1 * var(--space-lg));
  padding-inline: var(--space-lg);
  padding-block: var(--space-2xl);
}

.hero h1 {
  font-size: clamp(3.2rem, 9vw, 6.5rem);
  max-width: 12ch;
  margin-block-end: var(--space-lg);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.hero h1 em {
  font-style: italic;
  color: var(--color-accent);
}

.hero p {
  font-size: var(--size-lg);
  color: var(--color-muted);
  max-width: 38ch;
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  line-height: 1.7;
  padding-inline-start: var(--space-md);
  border-inline-start: 2px solid var(--color-accent-warm);
}


/* --- Intro section (home) --- */
.intro {
  padding-block: var(--space-2xl);
}

.intro p {
  font-size: var(--size-lg);
  max-width: var(--measure);
  line-height: 1.8;
}

.intro ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-block-start: var(--space-xl);
  padding-block-start: var(--space-xl);
  border-block-start: 1px solid var(--color-border);
}

.intro ul li {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: white;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent-warm);
  border-radius: 2px;
}

.intro ul li svg {
  color: var(--color-accent);
  flex-shrink: 0;
}

.intro ul li span {
  font-family: var(--font-display);
  font-size: var(--size-xl);
  font-style: italic;
  color: var(--color-accent);
  line-height: 1.2;
}

/* --- CTA section (home) --- */
.cta {
  padding-block: var(--space-2xl);
  background-color: var(--color-bg-warm);
  margin-inline: calc(-1 * var(--space-lg));
  padding-inline: var(--space-lg);
}

.cta p {
  font-size: var(--size-lg);
  max-width: var(--measure);
  line-height: 1.8;
}

.cta a {
  display: inline-block;
  margin-block-start: var(--space-lg);
  padding: var(--btn-padding);
  background-color: var(--color-accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--size-md);
  border-radius: 2px;
  letter-spacing: 0.02em;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.cta a:hover {
  background-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* --- Page header (blog index, about) --- */
.page-header {
  background: linear-gradient(135deg, var(--color-bg-warm) 0%, var(--color-bg) 65%);
  margin-inline: calc(-1 * var(--space-lg));
  padding-inline: var(--space-lg);
  padding-block: var(--space-2xl) var(--space-xl);
  margin-block-end: var(--space-2xl);
}

.page-header h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-block-end: var(--space-md);
}

.page-header h1 em {
  font-style: italic;
  color: var(--color-accent);
}

.page-header > p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--size-lg);
  color: var(--color-muted);
  margin: 0;
  padding-inline-start: var(--space-md);
  border-inline-start: 2px solid var(--color-accent-warm);
}

/* --- Blog post grid --- */
.post-grid {
  list-style: none;
  padding: 0;
  margin-block-start: var(--space-xl);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.post-grid li {
  display: flex;
}

.post-grid article {
  display: flex;
  flex-direction: column;
  width: 100%;
  /* Override the global article max-width for grid cards */
  max-width: none;
  margin-inline: 0;
}

.post-grid article a {
  text-decoration: none;
  color: inherit;
  display: block;
  overflow: hidden; /* contains the img scale transform */
}

.post-grid article a:hover h2 {
  color: var(--color-accent);
}

.post-grid article img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
  border-radius: 2px;
  transition: opacity 0.2s ease, transform 0.3s ease;
}

.post-grid article a:hover img {
  opacity: 0.88;
  transform: scale(1.015);
}

.post-grid article h2 {
  font-size: var(--size-lg);
  margin-block: var(--space-sm) var(--space-xs);
  transition: color 0.2s ease;
}

.post-grid article time {
  display: block;
  margin-block: var(--space-xs);
}

.post-grid article p {
  font-size: var(--size-sm);
  color: var(--color-muted);
  margin-block-start: var(--space-xs);
  flex: 1;
}

/* --- Individual blog post (article) --- */
article {
  max-width: var(--measure);
  margin-inline: auto;
}

article header {
  /* Full-bleed warm gradient — like the hero, but for a post */
  background: linear-gradient(135deg, var(--color-bg-warm) 0%, var(--color-bg) 65%);
  margin-inline: calc(-1 * var(--space-lg));
  padding-inline: var(--space-lg);
  padding-block: var(--space-2xl) var(--space-xl);
  margin-block-end: var(--space-xl);
  /* Override site-header layout — this is an article header, not the site header */
  display: block;
  border-bottom: none;
  max-width: none;
}

article header h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  letter-spacing: -0.025em;
  line-height: 1.1;
  max-width: 22ch;
  margin-block-end: var(--space-lg);
}

article header time {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--size-sm);
  color: var(--color-accent-warm);
  letter-spacing: 0.02em;
  margin-block-end: var(--space-xs);
}

.photo-credit {
  font-size: var(--size-xs);
  color: var(--color-muted);
  margin-block-start: var(--space-xs);
  margin-block-end: var(--space-lg);
}

.photo-credit a {
  color: var(--color-muted);
}

.byline {
  font-size: var(--size-sm);
  color: var(--color-muted);
  margin: 0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

article > img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin-block: var(--space-lg);
  border-radius: 2px;
}

/* Prose body — generous line height, warm reading rhythm */
article p,
article li {
  font-size: var(--prose-size);
  line-height: 1.85;
  color: var(--prose-color);
}

article h2 {
  margin-block-start: var(--space-xl);
}

article h3 {
  color: var(--color-accent);
}

/* Post nav */
.post-nav {
  max-width: var(--measure);
  margin-inline: auto;
  margin-block-start: var(--space-xl);
  padding-block-start: var(--space-lg);
  border-top: 1px solid var(--color-border);
  /* Override site nav styles — this is in-page navigation, not the site nav */
  display: block;
}

.post-nav a {
  font-weight: 600;
  text-decoration: none;
}

.post-nav a:hover {
  text-decoration: underline;
}

/* --- About page --- */
.about-company {
  padding-block-end: var(--space-2xl);
  margin-block-end: var(--space-lg);
}

.about-company h1 {
  margin-block-end: var(--space-md);
}

.about-company p {
  max-width: var(--measure);
  font-size: var(--size-lg);
}

.about-company address {
  margin-block-start: var(--space-lg);
  font-size: var(--size-md);
  color: var(--color-muted);
}

.about-person {
  display: grid;
  grid-template-columns: var(--about-img-width) 1fr;
  gap: var(--space-xl);
  align-items: start;
  padding-block-end: var(--space-2xl);
  margin-block-end: var(--space-lg);
}

.about-person img {
  width: 100%;
  border-radius: 2px;
  object-fit: cover;
  aspect-ratio: 3 / 4;
}

.about-person h2 {
  margin-block-start: 0;
}

.about-person p {
  max-width: 55ch;
}

nav.social-personal {
  display: flex;
  gap: var(--space-md);
  margin-block-start: var(--space-md);
}

nav.social-personal a {
  font-weight: 600;
  font-size: var(--size-sm);
}

/* --- Values --- */
.values h2 {
  margin-block-end: var(--space-lg);
}

.value-cards {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.value-cards li {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  background-color: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.value-icon {
  display: block;
  color: var(--color-accent);
  margin-block-end: var(--space-md);
}

.value-cards h3 {
  font-size: var(--size-lg);
  margin-block: 0 var(--space-sm);
  color: var(--color-accent);
}

.value-cards p {
  margin: 0;
  font-size: var(--size-sm);
  color: var(--color-muted);
  line-height: 1.6;
}

/* --- Career arc (about page) --- */
.career-arc {
  padding-block: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.career-list {
  list-style: none;
  padding: 0;
  margin-block-start: var(--space-xl);
}

.career-item {
  display: grid;
  grid-template-columns: 10ch 1fr;
  gap: var(--space-lg);
  padding-block: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.career-item:last-child {
  border-bottom: 1px solid var(--color-border);
}

.career-years {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--size-sm);
  color: var(--color-accent-warm);
  padding-block-start: 0.25rem;
}

.career-company {
  display: block;
  font-family: var(--font-display);
  font-size: var(--size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-block-end: var(--space-xs);
}

.career-role {
  display: block;
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  margin-block-end: var(--space-sm);
}

.career-detail {
  font-size: var(--size-sm);
  color: var(--color-muted);
  margin: 0;
  line-height: 1.6;
}

/* --- Credentials (about page) --- */
.credentials {
  padding-block: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.credentials-list {
  list-style: none;
  padding: 0;
  margin-block-start: var(--space-xl);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.credentials-list li {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  background-color: #fff;
}

.credentials-list li strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--size-md);
  font-weight: 700;
  color: var(--color-text);
  margin-block-end: var(--space-xs);
}

.credentials-list li span {
  font-size: var(--size-sm);
  color: var(--color-muted);
}

/* --- Contact (about page) --- */
.about-contact {
  padding-block: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.about-contact p {
  font-size: var(--size-lg);
  max-width: var(--measure);
  line-height: 1.8;
}

.about-contact address {
  margin-block-start: var(--space-lg);
  font-size: var(--size-md);
  color: var(--color-muted);
  line-height: 1.9;
}

/* --- 404 page --- */
.page-404 {
  text-align: center;
  padding-block: var(--space-2xl);
}

.page-404 h1 {
  font-size: var(--size-3xl);
  margin-block-end: var(--space-md);
}

/* ── Mentoring section ───────────────────────────────── */
.mentoring {
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.mentoring__header {
  display: block;
}

.mentoring__eyebrow {
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-sm);
}

.mentoring__headline {
  font-family: var(--font-display);
  font-size: var(--size-2xl);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text);
  max-width: 28ch;
  margin: 0 0 var(--space-md);
  line-height: 1.3;
}

.mentoring__lead {
  font-family: var(--font-body);
  font-size: var(--size-lg);
  color: var(--color-muted);
  max-width: 58ch;
  margin: 0 0 var(--space-xl);
  line-height: 1.7;
}

.mentoring__topics {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-xl);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.mentoring__topics li {
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  font-family: var(--font-body);
  font-size: var(--size-md);
  color: var(--color-muted);
  line-height: 1.6;
}

.mentoring__topics li strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.mentoring__footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  background: transparent;
  color: var(--color-text);
  padding: 0;
  text-align: center;
}

.mentoring__format {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  color: var(--color-text);
  margin: 0;
  letter-spacing: 0.03em;
}

.mentoring__cta {
  font-family: var(--font-body);
  font-size: var(--size-md);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1.5px solid var(--color-accent);
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}

.mentoring__cta:hover {
  color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.mentoring__actions {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.mentoring__actions-sep {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  color: var(--color-muted);
  font-style: italic;
}

.mentoring__podcast {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  color: var(--color-muted);
  text-decoration: none;
  font-style: italic;
}

.mentoring__podcast:hover {
  color: var(--color-accent);
}

/* ── Post CTA (mentoring nudge at end of blog posts) ── */
.post-cta {
  background: var(--color-bg-warm);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-lg);
  margin-block: var(--space-xl);
  max-width: var(--measure);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.post-cta__text {
  font-family: var(--font-body);
  font-size: var(--size-md);
  font-style: italic;
  color: var(--color-muted);
  margin: 0;
}

.post-cta__link {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1.5px solid var(--color-accent);
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}

.post-cta__link:hover {
  color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

/* ── PDC nudge ───────────────────────────────────────── */
.pdc-nudge {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  color: var(--color-muted);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.pdc-nudge a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}

.pdc-nudge a:hover {
  text-decoration: underline;
}

/* ============================================================
   6. Utilities
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   7. Responsive — all media queries in one place
   ============================================================ */
@media (max-width: 760px) {
  header nav {
    gap: var(--space-md);
  }
}

@media (max-width: 540px) {
  /* Header stacks logo above nav */
  header {
    flex-direction: column;
    gap: var(--space-sm);
    padding-block: var(--space-md);
    text-align: center;
  }

  header nav {
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
  }

  /* Hero adjustments */
  .hero {
    padding-block: var(--space-xl) var(--space-lg);
  }

  .hero p {
    font-size: var(--size-lg);
  }

  /* About person: single column */
  .about-person {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  /* Career arc: collapse year into content column */
  .career-item {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .about-person img {
    max-width: var(--about-img-mobile);
    aspect-ratio: 3 / 4;
  }

  /* Intro list: single column */
  .intro ul {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  /* Post grid: single column below 540px */
  .post-grid {
    grid-template-columns: 1fr;
  }

  /* Reduce outer padding on small screens */
  header,
  main,
  footer > * {
    padding-inline: var(--space-md);
  }
}

/* ============================================================
   8. Reading progress bar (blog posts only)
   ============================================================ */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--color-accent);
  z-index: 101;
  transition: width 0.1s linear;
}