/* ═══════════════════════════════════════════════════════════
   MLA TECH — Stylesheet
   mla-tech.fr — Mathieu Laude
   ═══════════════════════════════════════════════════════════ */

/* ─── Custom Properties ─────────────────────────────────────── */
:root {
  /* Brand */
  --color-bg:           #F5F0E8;
  --color-surface:      #FFFFFF;
  --color-surface-alt:  #FDFAF5;
  --color-dark-bg:      #1E1C3A;
  --color-dark-surface: #2D2B5A;

  --color-primary:      #2D2B5A;
  --color-primary-dark: #1E1C3A;
  --color-accent:       #E8A030;
  --color-accent-dark:  #C8831A;

  --color-text:         #1A1A2E;
  --color-text-muted:   #6B6B8A;
  --color-text-light:   #9B9BBB;
  --color-text-inv:     rgba(255,255,255,.92);
  --color-text-inv-muted: rgba(255,255,255,.65);

  --color-border:       #E5E0D8;
  --color-border-dark:  rgba(255,255,255,.12);

  /* Tag colours */
  --tag-bg:     #EDE9FF;
  --tag-color:  #3D3A7A;

  /* Sizing */
  --container-max: 1200px;
  --container-pad: clamp(1rem, 5vw, 2.5rem);
  --radius:        8px;
  --radius-lg:     16px;
  --radius-xl:     24px;

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow-md:   0 4px 16px rgba(45,43,90,.10);
  --shadow-lg:   0 8px 32px rgba(45,43,90,.14);

  /* Typography */
  --font-sans:   'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:   'Fira Code', 'Cascadia Code', monospace;
  --text-xs:   .75rem;
  --text-sm:   .875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  2rem;
  --text-4xl:  2.75rem;
  --text-5xl:  3.5rem;

  /* Motion */
  --transition: .2s ease;
  --transition-slow: .4s ease;
}

/* ─── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--color-surface);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul[role="list"], ol[role="list"] { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
h1,h2,h3,h4,h5,h6 { line-height: 1.25; }

/* ─── Layout Helpers ─────────────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--container-pad);
}
.section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
}
.section--light    { background: var(--color-surface); }
.section--beige    { background: var(--color-bg); }
.section--dark     { background: var(--color-dark-bg); color: var(--color-text-inv); }
.section__header   { max-width: 680px; margin-bottom: 3rem; }
.section__header--center { text-align: center; margin-inline: auto; }
.section__title    { font-size: var(--text-3xl); font-weight: 700; color: var(--color-primary); margin-bottom: .75rem; }
.section--dark .section__title { color: var(--color-text-inv); }
.section__subtitle { font-size: var(--text-lg); color: var(--color-text-muted); }
.section--dark .section__subtitle { color: var(--color-text-inv-muted); }
.section__cta { margin-top: 3rem; text-align: center; }

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  border-radius: 100px;
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border-color: var(--color-accent);
}
.btn--primary:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); }
.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--ghost:hover { background: var(--color-primary); color: #fff; }
.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover { background: var(--color-accent); color: var(--color-primary-dark); }
.btn--small { padding: .5rem 1.25rem; font-size: var(--text-sm); }
.btn--large { padding: 1rem 2.5rem; font-size: var(--text-lg); }

/* ─── Navigation ─────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: 2rem;
}
.nav__brand { display: flex; align-items: center; flex-shrink: 0; }
.nav__logo  { height: 2.5rem; width: auto; object-fit: contain; }
.nav__links {
  display: flex;
  align-items: center;
  gap: .25rem;
  list-style: none;
}
.nav__link {
  padding: .5rem .875rem;
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.nav__link:hover,
.nav__link--active {
  background: var(--color-bg);
  color: var(--color-primary);
}
.nav__toggle { display: none; flex-direction: column; gap: 5px; width: 28px; padding: 4px 0; }
.nav__toggle span { display: block; height: 2px; background: var(--color-primary); border-radius: 2px; transition: all var(--transition); }

/* ─── Hero ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  background: var(--color-dark-bg);
  color: var(--color-text-inv);
  overflow: hidden;
  padding-block: clamp(4rem, 10vw, 7rem);
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 70% at 70% 50%, rgba(232,160,48,.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 80% at 0% 80%, rgba(45,43,90,.6) 0%, transparent 50%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 3rem;
}
.hero__eyebrow {
  display: inline-block;
  padding: .35rem .9rem;
  background: rgba(232,160,48,.15);
  color: var(--color-accent);
  border: 1px solid rgba(232,160,48,.3);
  border-radius: 100px;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.hero__name {
  font-size: clamp(2.5rem, 6vw, var(--text-5xl));
  font-weight: 800;
  letter-spacing: -.02em;
  color: #fff;
  margin-bottom: .5rem;
}
.hero__role {
  font-size: clamp(1.1rem, 2.5vw, var(--text-xl));
  color: var(--color-text-inv-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}
.hero__role--accent { color: var(--color-accent); font-weight: 600; }
.hero__bio {
  font-size: var(--text-lg);
  color: var(--color-text-inv-muted);
  max-width: 540px;
  margin-bottom: 2.5rem;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__badge-wrap {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  border: 2px solid rgba(255,255,255,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0;
}
.hero__logo-large { width: 200px; height: 200px; object-fit: cover; border-radius: 50%; }
.hero__scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .35rem;
  color: var(--color-text-inv-muted);
  font-size: var(--text-xs);
  letter-spacing: .06em;
  text-transform: uppercase;
  animation: bounce 2s ease infinite;
}
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(6px)} }

/* ─── Cards grid ─────────────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.card--icon { display: flex; flex-direction: column; gap: .75rem; }
.card__icon {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  margin-bottom: .25rem;
}
.card__icon--blue   { background: #EEF2FF; color: #3730A3; }
.card__icon--orange { background: #FFF7ED; color: #C2410C; }
.card__icon--green  { background: #F0FDF4; color: #15803D; }
.card__icon--purple { background: #FAF5FF; color: #7E22CE; }
.card__icon--teal   { background: #F0FDFA; color: #0F766E; }
.card__icon--red    { background: #FFF1F2; color: #BE123C; }
.card__title { font-size: var(--text-lg); font-weight: 700; color: var(--color-primary); }
.card__body  { font-size: var(--text-sm); color: var(--color-text-muted); flex: 1; }

/* ─── Tags ───────────────────────────────────────────────────── */
.tag-list {
  display: flex; flex-wrap: wrap; gap: .375rem;
  list-style: none; padding: 0;
}
.tag-list li {
  padding: .2rem .65rem;
  background: var(--tag-bg);
  color: var(--tag-color);
  border-radius: 100px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .02em;
}
.tag-list--light li { background: rgba(255,255,255,.15); color: rgba(255,255,255,.9); }

/* ─── Certifications ─────────────────────────────────────────── */
.certs-row {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}
.cert-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  text-align: center;
  padding: 2.5rem 2rem;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-lg);
  min-width: 200px;
  transition: background var(--transition), border-color var(--transition);
}
.cert-badge:hover { background: rgba(255,255,255,.09); border-color: var(--color-accent); }
.cert-badge__icon { color: var(--color-accent); }
.cert-badge__title { font-size: var(--text-2xl); font-weight: 800; color: #fff; }
.cert-badge__sub { font-size: var(--text-sm); color: var(--color-text-inv-muted); }
.cert-badge__year {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .08em;
  padding: .2rem .75rem;
  background: rgba(232,160,48,.2);
  color: var(--color-accent);
  border-radius: 100px;
  text-transform: uppercase;
}

/* ─── Timeline ───────────────────────────────────────────────── */
.timeline {
  position: relative;
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), transparent);
}
.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1.5rem;
}
.timeline__marker {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-surface);
  box-shadow: 0 0 0 2px var(--color-accent);
  flex-shrink: 0;
  margin-top: .35rem;
}
.timeline__period {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: .25rem;
}
.timeline__title { font-size: var(--text-xl); font-weight: 700; color: var(--color-primary); }
.timeline__company { font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; margin-bottom: .75rem; }
.timeline__desc { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: .75rem; }

/* ─── Article Cards ──────────────────────────────────────────── */
.articles-preview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}
.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}
.article-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.article-card__img-wrap { display: block; overflow: hidden; aspect-ratio: 16/9; }
.article-card__img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.article-card:hover .article-card__img { transform: scale(1.04); }
.article-card__body { padding: 1.5rem; display: flex; flex-direction: column; gap: .75rem; flex: 1; }
.article-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.35;
}
.article-card__title a { text-decoration: none; transition: color var(--transition); }
.article-card__title a:hover { color: var(--color-accent); }
.article-card__excerpt { font-size: var(--text-sm); color: var(--color-text-muted); flex: 1; }
.article-card__footer { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: auto; font-size: var(--text-xs); color: var(--color-text-light); }
.article-card__link { font-weight: 600; color: var(--color-accent); text-decoration: none; }
.article-card__link:hover { text-decoration: underline; }

/* ─── Page Hero ──────────────────────────────────────────────── */
.page-hero {
  background: var(--color-dark-bg);
  color: var(--color-text-inv);
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2rem, 5vw, 4rem);
}
.page-hero--articles {
  background: linear-gradient(135deg, var(--color-dark-bg) 0%, #372B6A 100%);
}
.page-hero--prestations {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #1A3A5C 100%);
}
.page-hero__title   { font-size: clamp(2rem, 5vw, var(--text-4xl)); font-weight: 800; color: #fff; margin-bottom: .75rem; }
.page-hero__subtitle { font-size: var(--text-lg); color: var(--color-text-inv-muted); max-width: 600px; }

/* ─── Breadcrumb ─────────────────────────────────────────────── */
.breadcrumb { margin-bottom: 1.5rem; }
.breadcrumb ol { display: flex; align-items: center; gap: .5rem; font-size: var(--text-sm); color: var(--color-text-muted); }
.breadcrumb--light ol { color: var(--color-text-inv-muted); }
.breadcrumb li:not(:last-child)::after { content: '/'; margin-left: .5rem; }
.breadcrumb a { color: inherit; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb--light a { color: var(--color-text-inv-muted); }
.breadcrumb li[aria-current="page"] { color: var(--color-text-light); }
.breadcrumb--light li[aria-current="page"] { color: rgba(255,255,255,.45); }

/* ─── Article full page ──────────────────────────────────────── */
.article-hero {
  position: relative;
  background: var(--color-dark-bg);
  color: var(--color-text-inv);
  padding: clamp(3rem, 7vw, 6rem) 0;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--article-bg);
  background-size: cover;
  background-position: center;
  opacity: .2;
}
.article-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(30,28,58,.95) 0%, rgba(30,28,58,.5) 100%);
}
.article-hero .container { position: relative; z-index: 1; }
.article-hero__content  { max-width: 760px; }
.article-hero__title    { font-size: clamp(1.8rem, 4.5vw, var(--text-4xl)); font-weight: 800; color: #fff; margin-block: .75rem; line-height: 1.2; }
.article-hero__subtitle { font-size: var(--text-lg); color: var(--color-text-inv-muted); margin-bottom: 1.5rem; }
.article-meta          { display: flex; align-items: center; gap: 1rem; font-size: var(--text-sm); color: var(--color-text-muted); }
.article-meta--light   { color: var(--color-text-inv-muted); }
.article-meta__author  { font-weight: 500; }

/* ─── Article layout ─────────────────────────────────────────── */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: start;
  padding-top: 3rem;
  padding-bottom: 5rem;
}
.article-sidebar { position: sticky; top: 5rem; display: flex; flex-direction: column; gap: 1.5rem; }
.sidebar-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.sidebar-card__title { font-size: var(--text-sm); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--color-text-muted); margin-bottom: 1rem; }
.author-bio { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1rem; }
.author-bio__avatar { border-radius: var(--radius); flex-shrink: 0; }
.author-bio__name { display: block; font-weight: 700; color: var(--color-primary); margin-bottom: .25rem; }
.author-bio__desc { font-size: var(--text-xs); color: var(--color-text-muted); }
.related-list { display: flex; flex-direction: column; gap: .75rem; }
.related-list__item { display: flex; flex-direction: column; gap: .15rem; text-decoration: none; padding: .75rem; border-radius: var(--radius); transition: background var(--transition); }
.related-list__item:hover { background: var(--color-surface); }
.related-list__title { font-size: var(--text-sm); font-weight: 600; color: var(--color-primary); }
.related-list__date { font-size: var(--text-xs); color: var(--color-text-light); }

/* ─── Prose (article body) ───────────────────────────────────── */
.prose {
  max-width: 720px;
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-text);
}
.prose--wide { max-width: 100%; }
.prose h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--color-border);
}
.prose h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 2rem;
  margin-bottom: .75rem;
}
.prose p { margin-bottom: 1.5rem; }
.prose a { color: var(--color-accent); font-weight: 500; text-decoration: underline; }
.prose a:hover { color: var(--color-accent-dark); }
.prose ul, .prose ol {
  margin-bottom: 1.5rem;
  padding-left: 1.75rem;
}
.prose li { margin-bottom: .5rem; }
.prose code {
  font-family: var(--font-mono);
  font-size: .875em;
  background: var(--color-bg);
  padding: .15em .45em;
  border-radius: 4px;
  color: var(--color-primary);
}
.prose pre {
  background: var(--color-dark-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}
.prose pre code { background: none; padding: 0; color: #e2e8f0; font-size: var(--text-sm); }
.prose blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--color-text-muted);
}
.prose img {
  border-radius: var(--radius-lg);
  margin: 2rem auto;
  box-shadow: var(--shadow-md);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: var(--text-sm);
}
.prose th, .prose td { padding: .75rem 1rem; border: 1px solid var(--color-border); text-align: left; }
.prose th { background: var(--color-bg); font-weight: 700; }
.prose hr { border: none; border-top: 2px solid var(--color-border); margin: 2.5rem 0; }

/* Prestations prose overrides */
.prose--wide h2 { font-size: var(--text-2xl); }
.prose--wide .prestation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

/* ─── CTA Section ─────────────────────────────────────────────── */
.cta-section {
  background: linear-gradient(135deg, var(--color-dark-bg) 0%, var(--color-dark-surface) 100%);
  color: var(--color-text-inv);
  text-align: center;
}
.cta-section__inner { max-width: 680px; margin: 0 auto; }
.cta-section__title { font-size: clamp(1.8rem, 4vw, var(--text-3xl)); font-weight: 800; color: #fff; margin-bottom: 1rem; }
.cta-section__body  { font-size: var(--text-lg); color: var(--color-text-inv-muted); margin-bottom: 2.5rem; }
.cta-section__actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
.cta-section .btn--primary { background: var(--color-accent); color: var(--color-primary-dark); }
.cta-section .btn--ghost { border-color: rgba(255,255,255,.4); color: rgba(255,255,255,.8); }
.cta-section .btn--ghost:hover { background: rgba(255,255,255,.1); border-color: #fff; color: #fff; }

/* ─── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-primary-dark);
  color: var(--color-text-inv-muted);
  padding-top: 4rem;
  font-size: var(--text-sm);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border-dark);
}
.footer__logo    { filter: brightness(0) invert(1) opacity(.9); height: 2.5rem; width: auto; margin-bottom: .75rem; }
.footer__tagline { font-size: var(--text-sm); line-height: 1.6; opacity: .7; }
.footer__heading { font-size: var(--text-xs); font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: rgba(255,255,255,.4); margin-bottom: 1rem; }
.footer__nav ul, .footer__contact ul { display: flex; flex-direction: column; gap: .5rem; }
.footer__nav a, .footer__contact a { color: var(--color-text-inv-muted); text-decoration: none; transition: color var(--transition); }
.footer__nav a:hover, .footer__contact a:hover { color: #fff; }
.footer__contact li { display: flex; align-items: center; gap: .5rem; }
.footer__contact svg { flex-shrink: 0; opacity: .5; }
.footer__bottom {
  padding-block: 1.5rem;
  text-align: center;
  font-size: var(--text-xs);
  opacity: .4;
}

/* ─── Empty state ─────────────────────────────────────────────── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { text-align: center; justify-content: center; }
  .certs-row { flex-direction: column; align-items: center; }
  .footer__grid { grid-template-columns: 1fr; }
  .nav__toggle { display: flex; }
  .nav__links {
    display: none;
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem var(--container-pad);
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;
    box-shadow: var(--shadow-md);
  }
  .nav__links--open { display: flex; }
  .nav { position: relative; }
  .timeline__item { grid-template-columns: 1.5rem 1fr; }
}

/* ─── Focus styles (accessibility) ──────────────────────────── */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ─── Print ───────────────────────────────────────────────────── */
@media print {
  .site-header, .site-footer, .article-sidebar, .cta-section { display: none; }
  .article-layout { grid-template-columns: 1fr; }
  .prose { font-size: 11pt; }
}