/* ==========================================
   DANLDK//REV — Brutalist Design System
   ========================================== */

:root {
  --bg: #f0ece3;
  --black: #0d0d0d;
  --white: #f0ece3;
  --red: #e63946;
  --blue: #1d3557;
  --yellow: #f4d35e;
  --text: #2b2b2b;
  --text-light: #6b6b6b;
  --display: 'Syne', sans-serif;
  --mono: 'Source Code Pro', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.75;
}

::selection { background: var(--red); color: white; }

/* ==========================================
   NAV
   ========================================== */

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--black);
  color: var(--white);
  border-bottom: 4px solid var(--red);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}

.nav-logo {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 3px;
}

.nav-logo span { color: var(--red); }

.nav-links { display: flex; gap: 4px; list-style: none; }

.nav-links a {
  color: var(--white);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 6px 14px;
  border: 2px solid transparent;
  transition: all 0.15s;
}

.nav-links a:hover { border-color: var(--red); }
.nav-links a.active { background: var(--red); }

/* ==========================================
   HERO — ARTICLE (split gauche/droite)
   ========================================== */

.hero-article {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 380px;
}

.hero-left {
  background: var(--black);
  color: var(--white);
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.hero-left::after {
  content: attr(data-bg);
  position: absolute;
  bottom: -40px;
  right: -20px;
  font-family: var(--display);
  font-size: 12rem;
  font-weight: 800;
  color: rgba(255,255,255,0.03);
  line-height: 1;
  pointer-events: none;
}

.hero-number {
  font-family: var(--display);
  font-size: 6rem;
  font-weight: 800;
  color: var(--red);
  line-height: 1;
  margin-bottom: 1rem;
}

.hero-article h1 {
  font-family: var(--display);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

.hero-right {
  background: var(--yellow);
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 4px solid var(--black);
  border-left: none;
}

.hero-meta-item {
  padding: 12px 0;
  border-bottom: 2px solid var(--black);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hero-meta-item:last-child { border-bottom: none; }

.hero-meta-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-light);
}

.hero-meta-value {
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
}

/* ==========================================
   HERO — BANNER (pages listing)
   ========================================== */

.hero-banner {
  background: var(--black);
  color: var(--white);
  border-bottom: 4px solid var(--red);
  padding: 3rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero-banner::after {
  content: attr(data-bg);
  position: absolute;
  bottom: -60px;
  right: -20px;
  font-family: var(--display);
  font-size: 16rem;
  font-weight: 800;
  color: rgba(255,255,255,0.03);
  line-height: 1;
  pointer-events: none;
}

.hero-banner-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.hero-banner h1 {
  font-family: var(--display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  text-transform: uppercase;
  line-height: 0.95;
  letter-spacing: -2px;
}

.hero-banner h1 span { color: var(--red); }

.hero-banner-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  max-width: 360px;
  text-align: right;
  line-height: 1.6;
}

/* ==========================================
   HERO — HOME (page d'accueil)
   ========================================== */

.hero-home {
  display: grid;
  grid-template-columns: 3fr 2fr;
  min-height: 480px;
  border-bottom: 4px solid var(--black);
}

.hero-home-left {
  background: var(--black);
  color: var(--white);
  padding: 4rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
}

.hero-home-left::before {
  content: '//';
  position: absolute;
  top: -40px;
  left: -20px;
  font-family: var(--display);
  font-size: 22rem;
  font-weight: 800;
  color: rgba(255,255,255,0.02);
  line-height: 1;
  pointer-events: none;
}

.hero-home-eyebrow {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--red);
  margin-bottom: 1.5rem;
}

.hero-home h1 {
  font-family: var(--display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  text-transform: uppercase;
  line-height: 0.9;
  letter-spacing: -3px;
  margin-bottom: 1.5rem;
}

.hero-home h1 span { color: var(--red); }

.hero-home-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  max-width: 480px;
  line-height: 1.7;
  border-left: 3px solid var(--red);
  padding-left: 16px;
}

.hero-home-right {
  background: var(--yellow);
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-left: 4px solid var(--black);
}

.hero-home-stat {
  padding: 16px 0;
  border-bottom: 2px solid var(--black);
}

.hero-home-stat:last-child { border-bottom: none; }

.hero-home-stat-num {
  font-family: var(--display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--black);
  line-height: 1;
}

.hero-home-stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-light);
}

/* ==========================================
   HERO — ABOUT
   ========================================== */

.hero-about {
  background: var(--black);
  color: var(--white);
  border-bottom: 4px solid var(--yellow);
  overflow: hidden;
}

.hero-about-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  min-height: 280px;
}

.hero-about-left {
  padding: 3rem 3rem 3rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero-about-left::after {
  content: 'WHO';
  position: absolute;
  bottom: -60px;
  right: -20px;
  font-family: var(--display);
  font-size: 13rem;
  font-weight: 800;
  color: rgba(255,255,255,0.03);
  line-height: 1;
  pointer-events: none;
}

.hero-about h1 {
  font-family: var(--display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  text-transform: uppercase;
  line-height: 1;
  letter-spacing: -2px;
}

.hero-about h1 span { color: var(--red); }

.hero-about-role {
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-top: 1rem;
}

.hero-about-right {
  background: var(--yellow);
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 4px solid rgba(255,255,255,0.1);
}

.hero-about-stat {
  padding: 12px 0;
  border-bottom: 2px solid var(--black);
}

.hero-about-stat:last-child { border-bottom: none; }

.hero-about-stat-num {
  font-family: var(--display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--black);
  line-height: 1;
}

.hero-about-stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-light);
}

/* ==========================================
   BREADCRUMB
   ========================================== */

.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 2rem 0;
}

.breadcrumb a {
  font-family: var(--display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-light);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}

.breadcrumb a:hover { color: var(--red); border-color: var(--red); }

/* ==========================================
   CONTENT LAYOUT (write-up pages)
   ========================================== */

.content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
}

/* ==========================================
   TOC
   ========================================== */

.toc {
  position: sticky;
  top: 80px;
  align-self: start;
  padding-top: 2rem;
}

.toc-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-light);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--black);
}

.toc a {
  display: block;
  color: var(--text-light);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  transition: all 0.15s;
}

.toc a:hover { color: var(--red); padding-left: 8px; }

/* ==========================================
   ARTICLE CONTENT
   ========================================== */

article {
  padding: 2rem 0 4rem;
  max-width: 700px;
}

article p {
  margin-bottom: 1.5rem;
  color: var(--text);
}

article h2 {
  font-family: var(--display);
  font-size: 1.8rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--black);
  margin: 3rem 0 1rem;
  padding: 12px 16px;
  background: var(--yellow);
  border-left: 6px solid var(--black);
  display: inline-block;
}

article h3 {
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 2rem 0 0.8rem;
  color: var(--red);
}

article a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 2px solid var(--red);
}

article a:hover { background: var(--red); color: white; }

article ul {
  list-style: none;
  margin: 1rem 0 1.5rem;
}

article ul li {
  padding: 6px 0 6px 20px;
  position: relative;
}

article ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--red);
  font-weight: 700;
}

article ol {
  margin: 1rem 0 1.5rem;
  padding-left: 24px;
}

article ol li { padding: 4px 0; }

article img {
  max-width: 100%;
  margin: 20px 0;
  border: 3px solid var(--black);
  display: block;
}

/* ==========================================
   CODE
   ========================================== */

.code-block {
  background: var(--black);
  border: 4px solid var(--black);
  margin: 2rem 0;
  position: relative;
}

.code-block::before {
  content: attr(data-lang);
  position: absolute;
  top: 0;
  right: 0;
  background: var(--red);
  color: white;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 12px;
}

.code-block pre {
  padding: 24px;
  padding-top: 36px;
  font-size: 13px;
  line-height: 1.7;
  color: #e0e0e0;
  overflow-x: auto;
}

.code-block .kw { color: var(--yellow); }
.code-block .str { color: #98c379; }
.code-block .comment { color: #5c6370; }

code {
  font-family: var(--mono);
  background: rgba(0,0,0,0.08);
  color: var(--black);
  padding: 2px 6px;
  font-size: 0.9em;
  border: 1px solid rgba(0,0,0,0.12);
}

.code-block code {
  background: none;
  color: #e0e0e0;
  border: none;
  padding: 0;
  font-size: 1em;
}

/* ==========================================
   CALLOUT
   ========================================== */

.callout {
  border: 4px solid var(--black);
  padding: 20px 24px;
  margin: 2rem 0;
  position: relative;
  background: white;
}

.callout::before {
  content: attr(data-type);
  position: absolute;
  top: -14px;
  left: 16px;
  background: var(--red);
  color: white;
  font-family: var(--display);
  font-weight: 800;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 3px 12px;
}

.callout.info::before { background: var(--blue); }

.callout p { margin: 0; font-size: 14px; }

/* ==========================================
   FLAG RESULT
   ========================================== */

.flag-result {
  background: var(--black);
  color: var(--yellow);
  padding: 20px 24px;
  margin: 2rem 0;
  border-left: 6px solid var(--red);
  font-size: 14px;
}

.flag-result code {
  background: none;
  color: var(--yellow);
  font-size: 1em;
  padding: 0;
  border: none;
}

/* ==========================================
   TAGS (article)
   ========================================== */

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 3rem 0;
  padding-top: 2rem;
  border-top: 4px solid var(--black);
}

.tag {
  font-family: var(--display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 6px 14px;
  border: 3px solid var(--black);
  background: transparent;
  transition: all 0.15s;
  cursor: pointer;
}

.tag:hover { background: var(--black); color: var(--white); }

/* ==========================================
   LISTING PAGES
   ========================================== */

.page-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.section-label {
  font-family: var(--display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-light);
  margin-bottom: 2rem;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--black);
  display: inline-block;
}

/* Filtres */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 3rem;
  border: 3px solid var(--black);
  width: fit-content;
}

.filter-btn {
  font-family: var(--display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 10px 20px;
  background: transparent;
  border: none;
  border-right: 3px solid var(--black);
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text);
}

.filter-btn:last-child { border-right: none; }
.filter-btn:hover { background: var(--black); color: var(--white); }
.filter-btn.active { background: var(--red); color: white; }

/* Grille de cartes */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 0;
}

.card {
  border: 3px solid var(--black);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.15s;
  position: relative;
  margin: -1.5px;
  background: var(--bg);
  text-decoration: none;
  color: inherit;
}

.card:hover { background: var(--yellow); z-index: 1; }

.card-category {
  font-family: var(--display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--red);
  margin-bottom: 10px;
}

.card-title {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 800;
  text-transform: uppercase;
  line-height: 1.2;
  margin-bottom: 12px;
  color: var(--black);
}

.card-excerpt {
  font-size: 13px;
  color: var(--text-light);
  flex: 1;
  margin-bottom: 20px;
  line-height: 1.6;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 2px solid var(--black);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card-date { color: var(--text-light); }
.card-read-time { color: var(--red); }

/* Badges difficulté */
.card-difficulty {
  display: inline-block;
  font-family: var(--display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 3px 10px;
  border: 2px solid;
  margin-bottom: 10px;
}

.diff-easy { border-color: #155724; color: #155724; background: #d4edda; }
.diff-medium { border-color: var(--black); color: var(--black); background: var(--yellow); }
.diff-hard { border-color: var(--red); color: white; background: var(--red); }

.card-ctf {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-light);
}

/* ==========================================
   ABOUT PAGE
   ========================================== */

.about-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.about-block {
  border: 3px solid var(--black);
  padding: 2rem;
  margin: -1.5px;
}

.about-block.full { grid-column: 1 / -1; }
.about-block.accent { background: var(--yellow); }
.about-block.dark { background: var(--black); color: var(--white); }

.about-block-title {
  font-family: var(--display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--red);
  margin-bottom: 1.5rem;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--red);
  display: inline-block;
}

.about-block.dark .about-block-title {
  color: var(--yellow);
  border-color: var(--yellow);
}

.about-block.accent .about-block-title {
  color: var(--black);
  border-color: var(--black);
}

/* Bio */
.bio-name {
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 800;
  text-transform: uppercase;
  line-height: 1;
  margin-bottom: 6px;
}

.bio-role {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.bio-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}

/* Skills */
.skill-group { margin-bottom: 1.5rem; }
.skill-group:last-child { margin-bottom: 0; }

.skill-group-name {
  font-family: var(--display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.skill-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.skill-tag {
  font-family: var(--display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 5px 12px;
  border: 2px solid var(--black);
  background: var(--bg);
}

/* Timeline */
.timeline { position: relative; padding-left: 28px; }

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--black);
}

.timeline-item { position: relative; padding: 0 0 2rem 1rem; }

.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: -22px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--red);
  border: 2px solid var(--black);
}

.timeline-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1rem;
  text-transform: uppercase;
  line-height: 1.2;
  margin-bottom: 4px;
}

.timeline-company {
  font-size: 13px;
  color: var(--red);
  font-weight: 600;
}

.timeline-period {
  font-size: 12px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.timeline-desc { font-size: 13px; color: var(--text-light); }

/* Certifications */
.cert-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 1rem;
  align-items: center;
  padding: 12px 0;
  border-bottom: 2px solid rgba(0,0,0,0.1);
}

.about-block.dark .cert-item { border-color: rgba(255,255,255,0.1); }

.cert-item:last-child { border-bottom: none; }

.cert-name {
  font-family: var(--display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 14px;
}

.cert-issuer {
  font-size: 12px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-block.dark .cert-issuer { color: rgba(255,255,255,0.4); }

.cert-status {
  font-family: var(--display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 10px;
  border: 2px solid;
}

.cert-status.obtained { border-color: #155724; color: #155724; background: #d4edda; }
.cert-status.planned { border-color: var(--blue); color: var(--blue); }
.cert-status.in-progress { border-color: var(--black); color: var(--black); background: var(--yellow); }

/* Contact */
.contact-links { display: flex; flex-direction: column; }

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 2px solid rgba(255,255,255,0.08);
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.15s;
}

.contact-link:last-child { border-bottom: none; }
.contact-link:hover { color: var(--yellow); padding-left: 8px; }
.contact-icon { width: 24px; text-align: center; }

.availability {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 1.5rem;
  padding: 12px;
  border: 2px solid var(--yellow);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.status-dot {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  background: #2ecc71;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ==========================================
   RELATED (write-up pages)
   ========================================== */

.related {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
  border-top: 4px solid var(--black);
}

.related-title {
  font-family: var(--display);
  font-size: 1.4rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

.related-title::after {
  content: '';
  flex: 1;
  height: 4px;
  background: var(--black);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0;
}

.related-card {
  border: 3px solid var(--black);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: all 0.15s;
  position: relative;
  margin: -1.5px;
}

.related-card:hover { background: var(--yellow); z-index: 1; }

.related-card-num {
  font-family: var(--display);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(0,0,0,0.06);
  line-height: 1;
  margin-bottom: 8px;
}

.related-card h4 {
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.2;
  margin-bottom: 8px;
}

.related-card p { font-size: 13px; color: var(--text-light); }

.related-card-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--red);
  margin-top: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ==========================================
   WRITEUP NAV
   ========================================== */

.writeup-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

.nav-btn {
  display: inline-block;
  font-family: var(--display);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 12px 24px;
  border: 3px solid var(--black);
  text-decoration: none;
  color: var(--black);
  transition: all 0.15s;
}

.nav-btn:hover { background: var(--black); color: var(--white); }

/* ==========================================
   FOOTER
   ========================================== */

footer {
  background: var(--black);
  color: var(--white);
  text-align: center;
  padding: 2rem;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-top: 4px solid var(--red);
}

/* ==========================================
   NAV TOGGLE (hamburger)
   ========================================== */

.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--red);
  color: var(--white);
  font-size: 1.4rem;
  padding: 4px 12px;
  cursor: pointer;
  font-family: system-ui, sans-serif;
  line-height: 1;
  align-items: center;
  justify-content: center;
}

/* ==========================================
   RESPONSIVE
   ========================================== */

@media (max-width: 900px) {
  /* Navigation burger */
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 52px;
    left: 0;
    right: 0;
    background: var(--black);
    border-bottom: 4px solid var(--red);
    z-index: 99;
    padding: 0;
    margin: 0;
    list-style: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { border-bottom: 1px solid rgba(255,255,255,0.1); }
  .nav-links a { padding: 14px 2rem; display: block; border: none; font-size: 13px; }
  .nav-links a:hover { border: none; background: rgba(255,255,255,0.08); }
  .nav-links a.active { background: var(--red); border: none; }

  /* Hero sections */
  .hero-article { grid-template-columns: 1fr; padding: 0; }
  .hero-left { padding: 2rem; }
  .hero-right { border-left: 4px solid var(--black); padding: 2rem; }
  .hero-banner { padding: 2rem 1.5rem; }
  .hero-home { grid-template-columns: 1fr; }
  .hero-home-left { padding: 2rem 1.5rem; }
  .hero-home-right { border-left: none; border-top: 4px solid var(--black); padding: 2rem 1.5rem; }
  .hero-about-inner { grid-template-columns: 1fr; }
  .hero-about-left { padding: 2rem 1.5rem; }
  .hero-about-right { padding: 2rem 1.5rem; }

  /* Content layout */
  .content { grid-template-columns: 1fr; padding: 0 1.5rem; }
  .toc { position: static; border: 2px solid var(--black); padding: 1rem; margin: 1.5rem 0 0; }
  .related-grid { grid-template-columns: 1fr; }

  /* Hero banner */
  .hero-banner-inner { flex-direction: column; align-items: flex-start; }
  .hero-banner-desc { text-align: left; }

  /* About */
  .about-grid { grid-template-columns: 1fr; }
  .about-block { margin: 0; margin-top: -1.5px; }
  .about-block.full { grid-column: 1; }

  /* Filters */
  .filters { display: block; width: 100%; }
  .filter-btn { display: block; width: 100%; text-align: left; border: none; border-bottom: 3px solid var(--black); padding: 12px 16px; }
  .filter-btn:last-child { border-bottom: none; }

  /* Cards */
  .cards-grid { grid-template-columns: 1fr; }
  .card { margin: 0; margin-top: -1.5px; }
  .cards-grid .card:first-child { margin-top: 0; }

  /* Misc */
  .cert-item { grid-template-columns: 1fr; gap: 4px; }
  .page-content { padding: 2rem 1.5rem; }
}

@media (max-width: 480px) {
  /* Nav */
  .nav-inner { padding: 0 1rem; }

  /* Hero home */
  .hero-home-left { padding: 1.5rem 1rem; }
  .hero-home-right { padding: 1.5rem 1rem; }
  .hero-home-stat-num { font-size: 2.5rem; }

  /* Hero article */
  .hero-left { padding: 1.5rem 1rem; }
  .hero-right { padding: 1.5rem 1rem; }
  .hero-number { font-size: 4rem; }

  /* Hero banner */
  .hero-banner { padding: 1.5rem 1rem; }
  .hero-about-left { padding: 1.5rem 1rem; }
  .hero-about-right { padding: 1.5rem 1rem; }

  /* Content & article */
  .content { padding: 0 1rem; }
  .page-content { padding: 1.5rem 1rem; }
  .about-grid { padding: 0; }
  article { padding: 1.5rem 0 3rem; }
  article h2 { font-size: 1.4rem; }

  /* TOC masqué sur très petits écrans */
  .toc { display: none; }
}