/* ============================================================
   PORTFOLIO — EPHRAIM WAYANGA BOLINGO
   Design System — Vanilla CSS, no framework, no dependency.
   Organization:
   01. Variables      07. Navigation
   02. Reset          08. Hero
   03. Globals        09. Sections (Domaines, Compétences, Méthode, Réalisations, Contact)
   04. Typography     10. Cards & Boutons
   05. Utilitaires    11. SVG & Icons
   06. Layout         12. Animations
                      13. Responsive
   ============================================================ */

/* 01 — VARIABLES ============================================= */
:root {
  /* Couleurs — palette éditoriale chaude, sobre, intemporelle */
  --c-paper:        #F1ECE2;  /* fond principal, ivoire teinté */
  --c-paper-deep:   #E8E1D3;  /* fond légèrement plus dense */
  --c-surface:      #FBF8F2;  /* cartes, surfaces claires */
  --c-ink:          #1C1A17;  /* texte principal, encre chaude */
  --c-ink-soft:     #3A352D;
  --c-text:         #5A554C;  /* texte secondaire */
  --c-muted:        #8A8378;  /* texte tertiaire, labels */
  --c-line:         #D9D2C5;  /* filets, séparateurs */
  --c-line-soft:    #E4DECF;
  --c-accent:       #B0532E;  /* terre de sienne brûlée, rare */
  --c-accent-soft:  #C97A52;
  --c-night:        #232019;  /* section sombre, contraste */
  --c-night-text:   #D9D2C5;
  --c-night-muted:  #8A8378;

  /* Profondeur du fond — très subtile, obtenue uniquement en CSS */
  --bg-gradient: radial-gradient(120% 80% at 50% -10%, #F6F1E7 0%, #F1ECE2 55%, #ECE5D6 100%);

  /* Typographie — piles système raffinées (aucune police externe) */
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "URW Palladio L", "Book Antiqua", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;

  /* Échelle typographique (ratio ~1.25) */
  --fs-mega:    clamp(2.75rem, 6vw, 5rem);
  --fs-h1:      clamp(2rem, 4.2vw, 3.25rem);
  --fs-h2:      clamp(1.5rem, 3vw, 2.25rem);
  --fs-h3:      clamp(1.2rem, 2vw, 1.5rem);
  --fs-lead:    clamp(1.05rem, 1.6vw, 1.25rem);
  --fs-body:    1rem;
  --fs-small:   0.875rem;
  --fs-micro:   0.75rem;

  /* Interligne */
  --lh-tight:   1.15;
  --lh-snug:    1.3;
  --lh-normal:  1.55;
  --lh-loose:   1.7;

  /* Espacements — échelle 4px */
  --s-1:  0.25rem;
  --s-2:  0.5rem;
  --s-3:  0.75rem;
  --s-4:  1rem;
  --s-5:  1.5rem;
  --s-6:  2rem;
  --s-7:  3rem;
  --s-8:  4rem;
  --s-9:  6rem;
  --s-10: 8rem;
  --s-11: 11rem;

  /* Layout */
  --maxw:       1180px;
  --maxw-prose: 64ch;
  --gutter:     1.5rem;

  /* Rayons */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;
  --r-pill: 999px;

  /* Ombres — douces, chaudes */
  --sh-1: 0 1px 2px rgba(28, 26, 23, 0.04), 0 1px 1px rgba(28, 26, 23, 0.03);
  --sh-2: 0 4px 12px rgba(28, 26, 23, 0.06), 0 2px 4px rgba(28, 26, 23, 0.04);
  --sh-3: 0 18px 40px rgba(28, 26, 23, 0.10), 0 6px 14px rgba(28, 26, 23, 0.06);
  --sh-card: 0 10px 30px rgba(28, 26, 23, 0.08), 0 2px 6px rgba(28, 26, 23, 0.05);

  /* Motion */
  --ease:        cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft:   cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast:    180ms;
  --dur:         320ms;
  --dur-slow:    600ms;
  --dur-reveal:  900ms;

  /* Header */
  --header-h: 72px;
}

/* 02 — RESET ================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
img, svg, video, picture { display: block; max-width: 100%; }
img { height: auto; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
table { border-collapse: collapse; }
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; border-radius: 2px; }

/* 03 — GLOBALS =============================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--c-text);
  background: var(--c-paper);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Grain subtil sur le fond pour évoquer le papier */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

main, header, footer { position: relative; z-index: 1; }

::selection { background: var(--c-accent); color: var(--c-paper); }

/* 04 — TYPOGRAPHIE =========================================== */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--c-ink);
  line-height: var(--lh-tight);
  font-weight: 500;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); letter-spacing: -0.015em; }
h3 { font-size: var(--fs-h3); }

p { line-height: var(--lh-normal); max-width: var(--maxw-prose); }
strong { color: var(--c-ink-soft); font-weight: 600; }

.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.lead {
  font-size: var(--fs-lead);
  line-height: var(--lh-loose);
  color: var(--c-ink-soft);
  font-family: var(--font-serif);
  font-weight: 400;
}

.mono { font-family: var(--font-mono); font-size: var(--fs-small); }

/* Filet décoratif sous les eyebrows */
.eyebrow--line::after {
  content: "";
  display: block;
  width: 32px;
  height: 1px;
  background: var(--c-accent);
  margin-top: var(--s-3);
  transform-origin: left;
}

/* 05 — UTILITAIRES =========================================== */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.prose { max-width: var(--maxw-prose); }
.text-ink { color: var(--c-ink); }
.text-muted { color: var(--c-muted); }
.text-accent { color: var(--c-accent); }
.center { text-align: center; }
.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;
}
.divider {
  height: 1px;
  background: var(--c-line);
  border: 0;
  width: 100%;
}

/* 06 — LAYOUT ================================================ */
.section {
  padding-block: clamp(4rem, 10vw, 8rem);
  position: relative;
}
.section--tight { padding-block: clamp(3rem, 7vw, 5rem); }
.section--night {
  background: var(--c-night);
  color: var(--c-night-text);
}
.section--night h2, .section--night h3 { color: var(--c-paper); }
.section--night .eyebrow { color: var(--c-accent-soft); }
.section--night .divider { background: rgba(217, 210, 197, 0.18); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  max-width: 46rem;
}
.section-head--center {
  align-items: center;
  text-align: center;
  margin-inline: auto;
}
.section-head h2 { max-width: 22ch; }

/* Grilles éditoriales */
.grid { display: grid; gap: var(--s-6); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* 07 — NAVIGATION ============================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  z-index: 100;
  background: rgba(241, 236, 226, 0.82);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: transform var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease),
              background var(--dur) var(--ease);
}
.site-header.is-hidden { transform: translateY(-100%); }
.site-header.is-scrolled { border-bottom-color: var(--c-line); }

.site-header__inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
}

/* Le nom = élément principal de navigation */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--c-ink);
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: color var(--dur-fast) var(--ease);
}
.brand:hover { color: var(--c-accent); }
.brand__mark { flex: none; color: var(--c-ink); transition: color var(--dur-fast) var(--ease); }
.brand:hover .brand__mark { color: var(--c-accent); }
.brand__name { line-height: 1.1; }

/* Navigation — discrète, à droite */
.nav { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2rem); }
.nav__link {
  position: relative;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--c-text);
  letter-spacing: 0.02em;
  padding-block: var(--s-2);
  transition: color var(--dur-fast) var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease-out);
}
.nav__link:hover, .nav__link:focus-visible { color: var(--c-ink); }
.nav__link:hover::after, .nav__link:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.nav__link.is-active { color: var(--c-ink); }
.nav__link.is-active::after { transform: scaleX(1); transform-origin: left; }

.nav__link--ghost {
  display: inline-flex; align-items: center; gap: var(--s-2);
  padding: var(--s-2) var(--s-4);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  color: var(--c-ink);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav__link--ghost::after { display: none; }
.nav__link--ghost:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* Bouton menu mobile */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  color: var(--c-ink);
  border-radius: var(--r-sm);
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  content: ""; display: block;
  width: 22px; height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease-out), opacity var(--dur-fast) var(--ease);
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before { position: absolute; top: -6px; }
.nav-toggle__bars::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* Menu mobile plein écran */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 95;
  background: var(--c-paper);
  background-image: var(--bg-gradient);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--s-6);
  padding: var(--s-8) var(--gutter);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility 0s linear var(--dur);
}
.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility 0s;
}
.mobile-menu a {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  color: var(--c-ink);
  font-weight: 500;
  transition: color var(--dur-fast) var(--ease);
}
.mobile-menu a:hover { color: var(--c-accent); }

/* 08 — HERO ================================================== */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-h) + var(--s-6));
  padding-bottom: var(--s-9);
  position: relative;
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  width: 100%;
}

.hero__content { display: flex; flex-direction: column; gap: var(--s-5); }

.hero__eyebrow { display: flex; align-items: center; gap: var(--s-3); color: var(--c-muted); }
.hero__eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--c-accent); flex: none; }

.hero__name {
  font-size: var(--fs-mega);
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-weight: 500;
  color: var(--c-ink);
}
.hero__name .ln { display: block; }
.hero__char {
  display: inline-block;
  opacity: 0;
  transform: translate(var(--offset-x, 0), var(--offset-y, 0)) rotate(var(--rotate-start, 0));
}
html.is-ready .hero__char {
  animation: heroNameDrop 1.1s var(--delay, 0ms) cubic-bezier(0.38, 0.1, 0.21, 1.02) forwards;
}
.hero__char--i-bounce {
  animation-name: heroIJump;
  animation-duration: 1.8s;
  animation-timing-function: cubic-bezier(0.34, 1.2, 0.43, 1.02);
}
@keyframes heroNameDrop {
  0% {
    opacity: 0;
    transform: translate(var(--offset-x, 0), var(--offset-y, 0)) rotate(var(--rotate-start, 0));
  }
  60% {
    opacity: 1;
    transform: translate(0, -0.15rem) rotate(0deg) scale(1.04);
  }
  75% {
    transform: translate(0, 0.1rem) rotate(0deg) scale(0.98);
  }
  88% {
    transform: translate(0, -0.05rem) rotate(0deg) scale(1.01);
  }
  100% {
    opacity: 1;
    transform: translate(0, 0) rotate(0deg) scale(1);
  }
}

@keyframes heroIJump {
  0% {
    opacity: 0;
    transform: translate(var(--offset-x, 0), calc(var(--offset-y, 0) - 9rem)) rotate(var(--rotate-start, 0));
  }
  22% {
    opacity: 1;
    transform: translate(0, -3rem) rotate(0deg) scale(1.1);
  }
  34% {
    transform: translate(0, 1.8rem) rotate(0deg) scale(0.92);
  }
  46% {
    transform: translate(0, -1.6rem) rotate(0deg) scale(1.06);
  }
  58% {
    transform: translate(0, 1rem) rotate(0deg) scale(0.96);
  }
  70% {
    transform: translate(0, -0.6rem) rotate(0deg) scale(1.03);
  }
  82% {
    transform: translate(0, 0.25rem) rotate(0deg) scale(0.99);
  }
  92% {
    transform: translate(0, -0.12rem) rotate(0deg) scale(1.01);
  }
  100% {
    opacity: 1;
    transform: translate(0, 0) rotate(0deg) scale(1);
  }
}

.hero__role {
  font-family: var(--font-serif);
  font-size: var(--fs-lead);
  color: var(--c-ink-soft);
  line-height: var(--lh-snug);
  max-width: 30ch;
}
.hero__role em { font-style: normal; color: var(--c-accent); }

.hero__desc {
  font-size: var(--fs-body);
  color: var(--c-text);
  max-width: 44ch;
  line-height: var(--lh-loose);
}

.hero__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-3); }

/* Cadre photographique du Hero — composition éditoriale, ni cercle ni rectangle simple */
.portrait {
  position: relative;
  width: 100%;
  max-width: 420px;
  margin-inline: auto;
  aspect-ratio: 4 / 5;
}
.portrait__frame {
  position: absolute;
  inset: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-paper-deep);
  box-shadow: var(--sh-3);
  z-index: 2;
}
.portrait__img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.08) brightness(0.96);
  transition: filter var(--dur-slow) var(--ease);
}
.portrait:hover .portrait__img { filter: grayscale(0.92) contrast(1.1) brightness(0.98); }

/* Filets graphiques autour du portrait — mettent en valeur sans surcharger */
.portrait__mark {
  position: absolute;
  z-index: 1;
  color: var(--c-accent);
  opacity: 0.85;
}
.portrait__mark--tl {
  top: -14px; left: -14px;
  width: 44px; height: 44px;
}
.portrait__mark--br {
  bottom: -14px; right: -14px;
  width: 60px; height: 60px;
  color: var(--c-ink);
  opacity: 0.12;
}
.portrait__caption {
  position: absolute;
  bottom: -2.5rem;
  right: 0;
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
}

/* Lignes de force verticales — guident le regard */
.hero__rule {
  position: absolute;
  top: 18%;
  bottom: 14%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--c-line) 20%, var(--c-line) 80%, transparent);
  z-index: 0;
}
.hero__rule--left { left: 8%; }
.hero__rule--right { right: 8%; }

.hero__scroll {
  position: absolute;
  bottom: var(--s-6);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-2);
  color: var(--c-muted);
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--c-muted), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 14px;
  background: var(--c-accent);
  animation: scrollHint 2.4s var(--ease-soft) infinite;
}
@keyframes scrollHint {
  0% { transform: translateY(-100%); opacity: 0; }
  30% { opacity: 1; }
  100% { transform: translateY(40px); opacity: 0; }
}

/* 09 — SECTIONS ============================================== */

/* Domaines d'expertise — deux univers qui se rejoignent */
.domains {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  align-items: stretch;
}
.domain {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  padding: var(--s-6);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-1);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.domain:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-card);
  border-color: var(--c-line-soft);
}
.domain__icon { width: 40px; height: 40px; color: var(--c-accent); flex: none; }
.domain__title { font-size: var(--fs-h3); }
.domain__list { display: flex; flex-direction: column; gap: var(--s-2); margin-top: var(--s-2); }
.domain__list li {
  position: relative;
  padding-left: var(--s-4);
  font-size: var(--fs-small);
  color: var(--c-text);
  line-height: var(--lh-snug);
}
.domain__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.65em;
  width: 8px; height: 1px;
  background: var(--c-accent);
}
/* Nœud central — symbolise la complémentarité */
.domains__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  padding-block: var(--s-5);
  position: relative;
}
.domains__node-line {
  width: 1px;
  flex: 1;
  background: linear-gradient(to bottom, transparent, var(--c-line), transparent);
}
.domains__node-mark {
  width: 28px; height: 28px;
  color: var(--c-accent);
  flex: none;
}
.domains__node-label {
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
  text-align: center;
  max-width: 12ch;
  line-height: 1.4;
}

/* Compétences — par catégorie, SVG homogènes */
.skill-group { display: flex; flex-direction: column; gap: var(--s-5); }
.skill-group__head {
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--c-line);
}
.skill-group__title { font-size: 1.05rem; color: var(--c-ink); font-family: var(--font-sans); font-weight: 600; letter-spacing: 0.01em; }
.skill-group__count { font-size: var(--fs-micro); color: var(--c-muted); letter-spacing: 0.1em; }
.skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}
.skill {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-2) var(--s-4);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  font-size: var(--fs-small);
  color: var(--c-ink-soft);
  transition: border-color var(--dur) var(--ease), transform var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.skill:hover { border-color: var(--c-accent); color: var(--c-ink); transform: translateY(-2px); }
.skill__icon { width: 18px; height: 18px; color: var(--c-text); flex: none; transition: color var(--dur-fast) var(--ease); }
.skill:hover .skill__icon { color: var(--c-accent); }

/* Méthode de travail — étapes */
.method {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.method__step {
  background: var(--c-surface);
  padding: var(--s-6);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  transition: background var(--dur) var(--ease);
}
.method__step:hover { background: var(--c-paper); }
.method__num {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--c-accent);
  letter-spacing: 0.1em;
}
.method__icon { width: 32px; height: 32px; color: var(--c-ink-soft); }
.method__title { font-size: 1.1rem; }
.method__text { font-size: var(--fs-small); color: var(--c-text); line-height: var(--lh-snug); }

/* Réalisations — cartes à compositions variées */
.works { display: flex; flex-direction: column; gap: clamp(2rem, 5vw, 4rem); }
.work {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(auto, 560px);
  gap: clamp(1.5rem, 3vw, 3rem);
  align-items: center;
}
.work--reverse .work__media { order: 2; }
.work__media {
  position: relative;
  width: 100%;
  max-width: 560px;
  aspect-ratio: 16 / 10;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-paper-deep);
  box-shadow: var(--sh-2);
}
.work__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out), filter var(--dur-slow) var(--ease);
}

/*  Formations complémentaires — miniatures de brevets */
.brevets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--s-4);
  align-items: center;
  justify-items: center;
  margin-top: var(--s-4);
}
.brevet {
  width: 100%;
  max-width: 240px;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--sh-1);
  background: var(--c-surface);
  cursor: pointer;
}
.brevet__thumb {
  display: block;
  width: 100%;
  height: 140px;
  object-fit: cover;
  transition: transform 260ms var(--ease), filter 260ms var(--ease);
  filter: grayscale(1) contrast(1.02);
}
.brevet:hover .brevet__thumb,
.brevet:focus .brevet__thumb {
  transform: scale(1.05);
  filter: none;
}

/* Overlay centré pour agrandissement 'écran' */
.brevet-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease);
  z-index: 1200;
}
.brevet-overlay.is-visible { opacity: 1; pointer-events: auto; }
.brevet-overlay img {
  max-width: min(90vw, 1100px);
  max-height: 86vh;
  border-radius: 8px;
  box-shadow: var(--sh-card);
  transform: translateY(-8px);
  transition: transform 300ms var(--ease);
}
.brevet-overlay.is-visible img { transform: translateY(0); }
.work__media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(28,26,23,0.18));
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.work:hover .work__media img { transform: scale(1.04); filter: contrast(1.05) saturate(1.05); }
.work:hover .work__media::after { opacity: 1; }

/* Numéro de projet en filigrane */
.work__index {
  position: absolute;
  top: var(--s-4); left: var(--s-4);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: rgba(251, 248, 242, 0.9);
  background: rgba(28, 26, 23, 0.5);
  padding: var(--s-1) var(--s-3);
  border-radius: var(--r-pill);
  letter-spacing: 0.08em;
  z-index: 2;
}

.work__body { display: flex; flex-direction: column; gap: var(--s-3); }
.work__title { font-size: var(--fs-h3); }
.work__desc { color: var(--c-text); max-width: 42ch; }
.work__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-top: var(--s-2);
}
.work__tech span {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--c-muted);
  padding: var(--s-1) var(--s-3);
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  letter-spacing: 0.04em;
}

/* Contact — volontairement minimaliste */
.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.contact__text { display: flex; flex-direction: column; gap: var(--s-4); }
.contact__text h2 { max-width: 18ch; }
.contact__channels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.channel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  min-height: 4.2rem;
  padding: calc(var(--s-3) + 0.35rem) var(--s-4);
  background: var(--c-surface);
  color: var(--c-ink-soft);
  transition: background var(--dur) var(--ease), color var(--dur-fast) var(--ease);
}
.channel:hover { background: var(--c-paper); color: var(--c-ink); }
.channel__icon { width: 20px; height: 20px; color: var(--c-text); flex: none; transition: color var(--dur-fast) var(--ease); }
.channel:hover .channel__icon { color: var(--c-accent); }
.channel__label { font-size: var(--fs-small); letter-spacing: 0.02em; }
.channel__value { font-size: var(--fs-micro); color: var(--c-muted); font-family: var(--font-mono); }

/* Footer — extrêmement sobre */
.site-footer {
  padding-block: var(--s-7);
  border-top: 1px solid var(--c-line);
  background: rgba(232, 225, 211, 0.4);
}
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-4);
}
.site-footer__sig {
  font-family: var(--font-serif);
  font-size: var(--fs-small);
  color: var(--c-ink-soft);
}
.site-footer__sig span { color: var(--c-accent); }
.site-footer__links { display: flex; gap: var(--s-5); }
.site-footer__links a {
  font-size: var(--fs-small);
  color: var(--c-text);
  transition: color var(--dur-fast) var(--ease);
}
.site-footer__links a:hover { color: var(--c-accent); }
.site-footer__year { font-family: var(--font-mono); font-size: var(--fs-micro); color: var(--c-muted); letter-spacing: 0.06em; }

/* 10 — BOUTONS =============================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-5);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--r-pill);
  transition: transform var(--dur-fast) var(--ease),
              background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
  will-change: transform;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--c-ink);
  color: var(--c-paper);
  box-shadow: var(--sh-1);
}
.btn--primary:hover {
  background: var(--c-accent);
  box-shadow: var(--sh-2);
}

.btn--ghost {
  background: transparent;
  color: var(--c-ink);
  border: 1px solid var(--c-line);
}
.btn--ghost:hover { border-color: var(--c-ink); color: var(--c-ink); }

.btn--light {
  background: transparent;
  color: var(--c-night-text);
  border: 1px solid rgba(217, 210, 197, 0.3);
}
.btn--light:hover { border-color: var(--c-accent-soft); color: var(--c-paper); }

.btn__icon { width: 16px; height: 16px; flex: none; }
.btn--download { position: relative; }
.btn--download .btn__icon { transition: transform var(--dur) var(--ease-out); }
.btn--download:hover .btn__icon { transform: translateY(2px); }

/* 11 — SVG & ICONS =========================================== */
.icon { width: 1em; height: 1em; display: inline-block; vertical-align: -0.125em; }
.svg-deco { color: var(--c-line); }
[aria-hidden="true"].icon, .svg-deco[aria-hidden="true"] { }

/* Sprites SVG masqués */
.svg-sprite { position: absolute; width: 0; height: 0; overflow: hidden; pointer-events: none; }

/* 12 — ANIMATIONS ============================================ */
/* États initiaux pour les révélations au scroll — chorégraphiées */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-reveal) var(--ease-out),
              transform var(--dur-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal="left"]  { transform: translateX(-28px); }
[data-reveal="right"] { transform: translateX(28px); }
[data-reveal="up"]    { transform: translateY(-24px); }
[data-reveal="down"]  { transform: translateY(24px); }
[data-reveal="fade"]  { transform: none; }
[data-reveal="scale"] { transform: scale(0.96); }

[data-reveal].is-visible { opacity: 1; transform: none; }

/* Apparition au chargement du Hero — directions variées */
[data-hero] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-hero="left"]  { transform: translateX(-24px); }
[data-hero="right"] { transform: translateX(24px); }
[data-hero="up"]    { transform: translateY(-20px); }
[data-hero="fade"]  { transform: none; }
.is-ready [data-hero] { opacity: 1; transform: none; }

/* Respect des préférences — désactive toutes les animations */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal], [data-hero] { opacity: 1 !important; transform: none !important; }
}

/* 13 — RESPONSIVE ============================================ */
@media (max-width: 960px) {
  :root { --gutter: 1.25rem; }

  .hero__grid { grid-template-columns: 1fr; gap: var(--s-7); }
  .hero__content { order: 2; }
  .portrait { max-width: 320px; order: 1; }
  .hero__rule { display: none; }

  .domains { grid-template-columns: 1fr; }
  .domains__node { flex-direction: row; padding-block: var(--s-2); }
  .domains__node-line { width: auto; height: 1px; }
  .domains__node-label { display: none; }

  .method { grid-template-columns: repeat(2, 1fr); }

  .work { grid-template-columns: 1fr; }
  .work--reverse .work__media { order: 0; }

  .contact { grid-template-columns: 1fr; }
  .contact__channels { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .nav { display: none; }
  .nav-toggle { display: inline-flex; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .method { grid-template-columns: 1fr; }
  .contact__channels { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .hero { padding-top: calc(var(--header-h) + var(--s-5)); }
  .hero__scroll { display: none; }

  .site-footer__inner { flex-direction: column; align-items: flex-start; gap: var(--s-3); }
}

@media (max-width: 480px) {
  :root { --gutter: 1.1rem; }
  .section { padding-block: clamp(3rem, 14vw, 4.5rem); }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { justify-content: center; }
  .skill { padding: var(--s-2) var(--s-3); }
}

/* Print — sobre */
@media print {
  .site-header, .hero__scroll, .nav-toggle, .mobile-menu { display: none; }
  body { background: #fff; }
  [data-reveal], [data-hero] { opacity: 1 !important; transform: none !important; }
}