/* ==========================================================================
   VARIABLES CSS — THÈME DARK TECH
   ========================================================================== */
:root {
  /* ── Palette sombre ────────────────────────────────────────────────────── */
  --color-bg:           #0B0F19;
  --color-bg-alt:       #111827;
  --color-surface:      rgba(255, 255, 255, 0.04);
  --color-surface-alt:  rgba(255, 255, 255, 0.06);
  --color-surface-card: rgba(255, 255, 255, 0.05);
  --color-border:       rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(243, 156, 18, 0.40);

  /* ── Textes ─────────────────────────────────────────────────────────────── */
  --color-text:         #F3F4F6;
  --color-text-muted:   #9CA3AF;
  --color-text-light:   #6B7280;

  /* ── Accentuation (orange/doré conservé) ───────────────────────────────── */
  --color-accent:       #f39c12;
  --color-accent-dark:  #d4870a;
  --color-accent-rgb:   243, 156, 18;
  --color-accent-glow:  rgba(243, 156, 18, 0.18);

  /* ── Header ─────────────────────────────────────────────────────────────── */
  --color-header-bg:    rgba(11, 15, 25, 0.80);

  /* ── Ombres ─────────────────────────────────────────────────────────────── */
  --shadow-xs:          0 1px 4px  rgba(0, 0, 0, 0.25);
  --shadow-sm:          0 4px 16px rgba(0, 0, 0, 0.30);
  --shadow-md:          0 8px 32px rgba(0, 0, 0, 0.40);
  --shadow-lg:          0 16px 56px rgba(0, 0, 0, 0.50);
  --shadow-accent:      0 10px 30px -10px rgba(var(--color-accent-rgb), 0.25);
  --shadow-glow:        0 0 24px rgba(var(--color-accent-rgb), 0.15);

  /* ── Rayons harmonisés ──────────────────────────────────────────────────── */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  /* ── Typographie ────────────────────────────────────────────────────────── */
  --font-family: 'Montserrat', Arial, sans-serif;

  /* ── Transitions ────────────────────────────────────────────────────────── */
  --transition:  0.25s ease;
  --transition-slow: 0.4s ease;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

/* Accessibilité (a11y) : Indicateur de focus clavier visible */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  /* Grain subtil pour textures tech */
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(var(--color-accent-rgb), 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(99, 102, 241, 0.05) 0%, transparent 60%);
  background-attachment: fixed;
}


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

/* Liens textuels généraux */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition), text-shadow var(--transition);
}

a:hover {
  color: var(--color-accent-light);
  text-shadow: 0 0 8px rgba(var(--color-accent-rgb), 0.35);
}


/* ==========================================================================
   HEADER & NAV
   ========================================================================== */
header {
  position: sticky;
  top: 0;
  z-index: 1200;
  background: var(--color-header-bg);
  backdrop-filter: blur(16px) saturate(1.6);
  -webkit-backdrop-filter: blur(16px) saturate(1.6);
  color: #fff;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.40);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.logo {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 1px;
  transition: color var(--transition);
}

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

.nav-links {
  list-style: none;
  display: flex;
  gap: 2.2rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* ==========================================================================
   LAYOUT PRINCIPAL
   ========================================================================== */
main {
  width: 100%;
  max-width: 1100px;
  margin: 2.5rem auto;
  padding: 0 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

main > * {
  width: 100%;
}

/* ==========================================================================
   SECTION BLOCK
   ========================================================================== */
.section-block {
  /* Glassmorphism — "verre dépoli" */
  background:    var(--color-surface-card);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border-radius: var(--radius-xl);
  border:        1px solid var(--color-border);
  box-shadow:
    var(--shadow-md),
    var(--shadow-accent),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  margin:   2rem auto;
  padding:  3.5rem 3rem;
  max-width: 100%;
  width:    100%;
  content-visibility: auto;
  contain-intrinsic-size: 900px;
  position: relative;
  overflow: hidden;
}

/* Reflet lumineux subtil en haut à gauche */
.section-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.04) 0%,
    transparent 50%
  );
  pointer-events: none;
  border-radius: inherit;
}

/* ==========================================================================
   SECTION : PRÉSENTATION
   ========================================================================== */
.presentation-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.presentation-text {
  flex: 1 1 350px;
  min-width: 300px;
}

/* Titre principal — dégradé lumineux */
.presentation-text h1 {
  font-size: 3.2rem;
  font-weight: 800;
  margin: 0 0 0.4rem 0;
  letter-spacing: -1px;
  line-height: 1.12;
  /* Dégradé texte : blanc → orange doré */
  background: linear-gradient(
    120deg,
    #ffffff  0%,
    #f3f4f6  40%,
    var(--color-accent) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  /* Halo lumineux discret */
  filter: drop-shadow(0 0 18px rgba(var(--color-accent-rgb), 0.25));
}

/* Sous-titre accentué */
.presentation-text h2 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 0 1.4rem 0;
  letter-spacing: 0.4px;
  opacity: 0.9;
}

/* Paragraphe principal */
.presentation-text p {
  color: var(--color-text-muted);
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 1.8rem;
}

/* Photo — effet flottant */
.presentation-photo {
  flex: 0 0 300px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  position: relative;
}

/* Halo derrière la photo */
.presentation-photo::after {
  content: '';
  position: absolute;
  inset: -10%;
  background: radial-gradient(
    ellipse at center,
    rgba(var(--color-accent-rgb), 0.12) 0%,
    transparent 70%
  );
  pointer-events: none;
  z-index: 0;
}

.presentation-photo img {
  max-width: 420px;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1.5px solid rgba(255, 255, 255, 0.10);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.60),
    0 0 40px rgba(var(--color-accent-rgb), 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  object-fit: cover;
  position: relative;
  z-index: 1;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.presentation-photo img:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow:
    0 28px 70px rgba(0, 0, 0, 0.65),
    0 0 50px rgba(var(--color-accent-rgb), 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   LIENS SOCIAUX
   ========================================================================== */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* Ghost buttons avec glow accent */
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.58rem 1.25rem;
  border-radius: 999px;
  /* Bordure ghost semi-transparente */
  border: 1.5px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.03);
  transition: all 0.3s ease;
  margin-right: 0;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.3px;
}

/* Brillance interne au repos */
.social-link::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.18),
    transparent
  );
}

.social-link:last-child {
  margin-right: 0;
}

.social-link i {
  font-size: 1.1em;
  vertical-align: middle;
}

/* Hover : glow orange + fond semi-transparent + border accent */
.social-link:hover {
  color: var(--color-accent);
  border-color: rgba(var(--color-accent-rgb), 0.55);
  background: rgba(var(--color-accent-rgb), 0.08);
  box-shadow:
    0 0 16px rgba(var(--color-accent-rgb), 0.20),
    0 4px 16px rgba(0, 0, 0, 0.30);
  transform: translateY(-2px);
}

/* ==========================================================================
   SECTION : NAVIGATION RAPIDE
   ========================================================================== */
.quick-nav-section {
  text-align: center;
}

.quick-nav-section h2 {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  letter-spacing: -0.3px;
}

.quick-nav-grid {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.quick-nav-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
  /* Glassmorphism épuré pleine largeur */
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 1.8rem 2.2rem;
  text-decoration: none;
  color: var(--color-text);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

/* Reflet interne haut */
.quick-nav-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  pointer-events: none;
}

.quick-nav-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.07);
  box-shadow:
    var(--shadow-md),
    0 0 20px rgba(var(--color-accent-rgb), 0.12);
  border-color: var(--color-border-hover);
}

.quick-nav-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--color-text);
}

.quick-nav-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   SECTION : CERTIFICATIONS
   ========================================================================== */
.cert-section h2,
.cv-preview-section h2 {
  text-align: center;
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.3px;
}

.cert-intro,
.cv-preview-intro {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 1.8rem;
  font-size: 1rem;
}

.cert-summary-list {
  max-width: 820px;
  margin: 0 auto 1.5rem auto;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.8rem;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--color-border);
}

/* Logos certifications */
.cert-logos {
  display: flex;
  gap: 2rem;
  justify-content: center;
  align-items: center;
  margin: 1.8rem 0 2rem 0;
  flex-wrap: wrap;
}

.cert-logo {
  height: 72px;
  width: auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  background: #fff;
  padding: 0.5rem;
  cursor: pointer;
}

.cert-logos a:hover .cert-logo,
.cert-logo:hover {
  transform: scale(1.08) rotate(-2deg);
  box-shadow: var(--shadow-accent);
  filter: brightness(1.06) drop-shadow(0 0 8px rgba(243, 156, 18, 0.5));
}

/* Les certifications s'ouvrent directement en pleine page / nouvel onglet */

/* ==========================================================================
   SECTION : CV
   ========================================================================== */
.cv-preview-card {
  max-width: 820px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.cv-preview-image {
  width: 100%;
  display: block;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  opacity: 0.92;
}

.cv-preview-action {
  text-align: center;
  margin-top: 1.5rem;
}

/* Boutons principaux — style ghost dark avec glow */
.cv-link,
.projet-link {
  display: inline-block;
  padding: 0.65rem 1.6rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.4px;
  transition: all 0.3s ease;
  border: 1.5px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-muted);
  position: relative;
  overflow: hidden;
}

/* Ligne brillante interne */
.cv-link::before,
.projet-link::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.cv-link {
  margin-top: 1rem;
  margin-bottom: 1.4rem;
}

.cv-link:hover,
.projet-link:hover {
  color: var(--color-accent);
  border-color: rgba(var(--color-accent-rgb), 0.55);
  background: rgba(var(--color-accent-rgb), 0.08);
  box-shadow:
    0 0 20px rgba(var(--color-accent-rgb), 0.22),
    0 6px 20px rgba(0, 0, 0, 0.35);
  transform: translateY(-2px);
}

/* ==========================================================================
   LISTES
   ========================================================================== */
.skills-list,
.cert-list {
  padding-left: 1.4rem;
  margin: 0 0 1.5rem 0;
  color: var(--color-text-muted);
}

.skills-list li,
.cert-list li {
  margin-bottom: 0.6rem;
  font-size: 1rem;
  line-height: 1.6;
}

/* ==========================================================================
   PAGE : ÉTUDES / TIMELINE
   ========================================================================== */
.etudes-section h1 {
  text-align: center;
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  letter-spacing: -0.4px;
}

.etudes-intro {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 820px;
  margin: 0 auto 2.5rem auto;
  line-height: 1.75;
}

.etudes-timeline {
  max-width: 920px;
  margin: 0 auto 3rem auto;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

/* Ligne continue de la frise chronologique */
.etudes-timeline::before {
  content: '';
  position: absolute;
  top: 1.6rem;
  bottom: 1.6rem;
  left: 120px;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--color-accent) 0%,
    rgba(var(--color-accent-rgb), 0.4) 70%,
    rgba(var(--color-accent-rgb), 0.1) 100%
  );
  z-index: 1;
}

.etape {
  display: flex;
  align-items: flex-start;
  position: relative;
  gap: 2.8rem;
  width: 100%;
}

/* Date de la timeline parfaitement alignée avec la carte */
.etape-date {
  width: 96px;
  flex-shrink: 0;
  text-align: right;
  font-size: 0.92rem;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.4px;
  padding-top: 1.5rem; /* Aligné au pixel près avec le titre h2 de .etape-content */
  line-height: 1.2;
}

/* Repère / puce lumineuse sur la ligne */
.etape::before {
  content: '';
  position: absolute;
  left: 114px; /* Centré sur la ligne à 120px : 120 - (14/2) + 1 = 114px */
  top: 1.6rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 10px rgba(var(--color-accent-rgb), 0.5);
  z-index: 2;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.etape:hover::before {
  transform: scale(1.25);
  background: var(--color-accent);
  box-shadow: 0 0 16px var(--color-accent);
}

.etape-content {
  flex: 1;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 1.6rem 1.8rem 1.4rem 1.8rem;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.etape-content:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 20px rgba(var(--color-accent-rgb), 0.10);
  border-color: var(--color-border-hover);
}

.etape-content h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.35rem 0;
  color: var(--color-text);
}

.etape-content p {
  margin: 0 0 0.6rem 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.etape-content ul {
  margin: 0.9rem 0 0 1.2rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  font-size: 0.97rem;
}

.etape-content li {
  margin-bottom: 0.35rem;
}

.etape-summary {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 0.9rem;
  font-size: 0.97rem;
}

.etudes-projets {
  max-width: 960px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 2.2rem 2rem;
  border: 1px solid var(--color-border);
}

.etudes-projets h2 {
  color: var(--color-accent);
  margin-bottom: 1rem;
  font-size: 1.2rem;
  font-weight: 700;
  text-align: center;
}

.etudes-projets ul {
  color: var(--color-text-muted);
  margin-left: 1.2rem;
  line-height: 1.75;
}

.etudes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
  margin-top: 1.2rem;
}

.etude-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.etude-card:hover {
  transform: translateY(-4px);
  box-shadow:
    var(--shadow-md),
    0 0 16px rgba(var(--color-accent-rgb), 0.10);
  border-color: var(--color-border-hover);
}

.etude-card h3 {
  margin: 0 0 0.4rem 0;
  color: var(--color-text);
  font-size: 1.05rem;
  font-weight: 700;
}

.etude-meta {
  margin: 0 0 0.75rem 0;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.9rem;
}

.etude-card p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.65;
  font-size: 0.96rem;
}

/* ==========================================================================
   PAGE : PROJETS
   ========================================================================== */
.projets-section h1 {
  text-align: center;
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  letter-spacing: -0.4px;
}

.projets-intro {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  font-size: 1rem;
}

.projets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.8rem;
  max-width: 1200px;
  margin: 0 auto;
}

.projet-card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 2.4rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  border: 1px solid var(--color-border);
}

.projet-card:hover {
  transform: translateY(-5px);
  box-shadow:
    var(--shadow-md),
    0 0 24px rgba(var(--color-accent-rgb), 0.12);
  border-color: var(--color-border-hover);
}

.projet-card h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-accent);
  letter-spacing: -0.1px;
}

.projet-desc {
  font-size: 0.98rem;
  color: var(--color-text-muted);
  margin-bottom: 1.2rem;
  line-height: 1.7;
  flex: 1;
}

/* Tags de compétences / stack technique pour les projets */
.projet-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.4rem;
}

.projet-tag {
  display: inline-block;
  padding: 0.22rem 0.65rem;
  background: rgba(var(--color-accent-rgb), 0.10);
  border: 1px solid rgba(var(--color-accent-rgb), 0.25);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent-light);
  letter-spacing: 0.2px;
}



/* ==========================================================================
   PAGE : COMPÉTENCES
   ========================================================================== */
.competences-section h1 {
  text-align: center;
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  letter-spacing: -0.4px;
}

.competences-intro {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.75;
}

.competences-meta {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: -1.2rem 0 1.2rem 0;
}

.competences-legend {
  text-align: center;
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
}

.competences-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  max-width: 1300px;
  margin: 0 auto 2.5rem auto;
}

.competence-card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 2rem 1.6rem 1.6rem 1.6rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  border: 1px solid var(--color-border);
  cursor: pointer;
  overflow: hidden;
}

/* Reflet interne */
.competence-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.10), transparent);
  pointer-events: none;
}

.competence-card:hover {
  transform: translateY(-4px);
  box-shadow:
    var(--shadow-md),
    0 0 24px rgba(var(--color-accent-rgb), 0.12);
  border-color: var(--color-border-hover);
}

.competence-card h2 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.6rem 0;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.competence-card h2::after {
  content: "\25BC";
  margin-left: auto;
  font-size: 0.72rem;
  line-height: 1;
  transition: transform 0.25s ease;
  color: var(--color-text-light);
}

.competence-card[aria-expanded="true"] h2::after {
  transform: rotate(180deg);
}

/* Badges de niveau */
.level-badge {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.4px;
  margin-left: 0.5rem;
  vertical-align: middle;
  border: 1px solid transparent;
}

/* Badges de niveau — adaptés dark */
.level-1 { background: rgba(253, 226, 226, 0.12); color: #fca5a5; border-color: rgba(245, 194, 194, 0.25); }
.level-2 { background: rgba(255, 239, 216, 0.10); color: #fbbf24; border-color: rgba(255, 217, 161, 0.25); }
.level-3 { background: rgba(227, 247, 230, 0.10); color: #6ee7b7; border-color: rgba(184, 235, 193, 0.25); }

/* AC (apprentissages critiques) */
.ac-list {
  margin: 0.5rem 0 0 0;
  padding: 0;
  list-style: none;
  display: block;
}

.ac-item {
  border-radius: var(--radius-sm);
  margin-bottom: 0.4rem;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.03);
}

.ac-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.65rem 0.9rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.87rem;
  color: var(--color-text);
  user-select: none;
  transition: background var(--transition), color var(--transition);
}

.ac-item-header:hover {
  background: var(--color-accent);
  color: #fff;
}

.ac-item-header:hover .ac-chevron {
  color: #fff;
}

.ac-chevron {
  flex-shrink: 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
  transition: transform 0.25s ease, color var(--transition);
}

.ac-item-body {
  padding: 0.8rem 1.1rem 0.9rem 1.1rem;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--color-border);
}

.ac-item-sae {
  display: block;
  margin: 0 0 0.4rem 0;
  color: #60a5fa;  /* bleu tech plus lisible sur fond sombre */
  font-size: 0.9rem;
  font-weight: 700;
}

.ac-item-desc {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
  text-align: center;
  padding: 2rem 0 1rem 0;
  color: var(--color-text-light);
  font-size: 0.92rem;
}

/* ==========================================================================
   RESPONSIVE — ≤ 900px
   ========================================================================== */
@media (max-width: 900px) {
  nav {
    flex-direction: column;
    justify-content: center;
    gap: 0.8rem;
    padding: 0.8rem 1rem;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.6rem 1.2rem;
  }

  main {
    margin: 1.5rem auto;
    padding: 0 0.75rem;
  }

  .section-block {
    margin: 1.4rem auto;
    padding: 2rem 1.4rem;
    border-radius: var(--radius-lg);
  }

  .presentation-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 2rem;
  }

  .presentation-text {
    min-width: 0;
  }

  .presentation-text h1 {
    font-size: 2.2rem;
  }

  .presentation-photo {
    flex: 1 1 auto;
    width: 100%;
    justify-content: center;
    margin-top: 1rem;
  }

  .presentation-photo img {
    max-width: 320px;
  }

  .quick-nav-grid,
  .projets-grid,
  .competences-grid,
  .etudes-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .cert-logos {
    flex-wrap: wrap;
    gap: 1rem;
  }

  .etudes-timeline {
    padding-left: 0;
  }

  .etudes-timeline::before {
    left: 16px;
    top: 1rem;
    bottom: 1rem;
  }

  .etape {
    flex-direction: column;
    gap: 0.5rem;
    padding-left: 2.6rem;
  }

  .etape::before {
    left: 10px;
    top: 0.35rem;
  }

  .etape-date {
    width: auto;
    text-align: left;
    padding-top: 0;
    display: inline-block;
    padding: 0.18rem 0.65rem;
    border-radius: 999px;
    background: rgba(var(--color-accent-rgb), 0.15);
    border: 1px solid rgba(var(--color-accent-rgb), 0.3);
    font-size: 0.82rem;
  }

  .etape-content,
  .etudes-projets,
  .cv-preview-card,
  .cert-summary-list {
    padding: 1.2rem;
  }
}

/* ==========================================================================
   RESPONSIVE — ≤ 520px
   ========================================================================== */
@media (max-width: 520px) {
  .logo {
    font-size: 1.2rem;
  }

  .nav-links {
    gap: 0.5rem 0.9rem;
  }

  .nav-links a {
    font-size: 0.9rem;
  }

  .section-block h1 {
    font-size: 1.75rem;
  }

  .section-block h2 {
    font-size: 1.2rem;
  }

  .social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
  }

  .social-link {
    font-size: 0.9rem;
    padding: 0.45rem 0.9rem;
  }

  .etude-card,
  .projet-card,
  .competence-card {
    padding: 1.2rem 1rem;
  }
}