/* ═══════════════════════════════════════════════
   CHARTRE & TOKENS
   Bauhaus : noir, blanc, rouge, bleu, jaune
   ═══════════════════════════════════════════════ */

:root {
  /* Couleurs */
  --color-bg:        #F4F0EB;   /* fond crème */
  --color-surface:   #FFFFFF;
  --color-ink:       #1A1A1A;   /* quasi-noir */
  --color-muted:     #5C5C5C;
  --color-red:       #F21A22;   /* rouge Bauhaus */
  --color-yellow:    #FFC500;   /* jaune Bauhaus */
  --color-border:    #1A1A1A;

  /* Typo */
  --font-display: 'Archivo Black', system-ui, sans-serif;
  --font-body:    'Space Grotesk', system-ui, sans-serif;

  /* Espacements */
  --space-xs:  .5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  6rem;
  --space-2xl: 8rem;

  /* Rayons */
  --radius: 0;   /* Bauhaus = angles vifs */

  /* Conteneur */
  --max-width: 1280px;

  /* Transitions */
  --transition: 250ms ease;
}

/* ═════ RESET ═════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

/* ═════ ACCESSIBILITÉ ═════ */

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: .75rem 1.5rem;
  font-weight: 600;
  transition: top var(--transition);
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 3px solid var(--color-blue);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

.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;
}

/* ═════ LAYOUT GÉNÉRAL ═════ */

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
}

.section-label {
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--color-red);
  margin-bottom: var(--space-sm);
}
.section-label--light { color: var(--color-yellow); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  max-width: 18ch;
}

/* ═════ BOUTONS ═════ */

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  border: 3px solid var(--color-ink);
  transition: all var(--transition);
  cursor: pointer;
}
.btn--primary { background: var(--color-ink); color: var(--color-bg); }
.btn--primary:hover { background: var(--color-red); border-color: var(--color-red); }

.btn--ghost { background: transparent; }
.btn--ghost:hover { background: var(--color-ink); color: var(--color-bg); }

.btn--light { background: var(--color-yellow); color: var(--color-ink); border-color: var(--color-ink); }
.btn--light:hover { background: var(--color-bg); }

.btn--ghost-light { background: transparent; color: var(--color-bg); border-color: var(--color-bg); }
.btn--ghost-light:hover { background: var(--color-bg); color: var(--color-ink); }

/* ═════ HEADER / NAV ═════ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
}

.nav-wrapper {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-sm) var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-body);
  font-size: 1.25rem;
}
.logo__mark {
  width: 36px; height: 36px;
}
.logo__text { letter-spacing: -.02em; }

.nav-menu ul {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.nav-menu a {
  font-weight: 500;
  padding: .5rem .25rem;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition);
}
.nav-menu a:hover, .nav-menu a:focus-visible {
  border-bottom-color: var(--color-red);
}
.nav-cta {
  border: 3px solid var(--color-ink) !important;
  padding: .5rem 1.25rem !important;
  font-weight: 600;
}
.nav-cta:hover { background: var(--color-ink); color: var(--color-bg); }

/* Toggle mobile */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
}
.nav-toggle__bar {
  width: 28px; height: 3px;
  background: var(--color-ink);
  transition: all var(--transition);
}
.nav-toggle.is-open .nav-toggle__bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-open .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle.is-open .nav-toggle__bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ═════ HERO ═════ */

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  padding-inline: var(--space-sm);
  overflow: hidden;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin-inline: auto;
  width: 100%;
  background-color: var(--color-yellow);
  padding: var(--space-lg);
}

.hero__eyebrow {
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  font-size: .875rem;
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 6rem);
  line-height: .95;
  letter-spacing: -.03em;
  margin-bottom: var(--space-md);
  max-width: 30ch;;
}
.hero__highlight {
  background: var(--color-bg);
  padding-inline: .15em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.hero__intro {
  max-width: 52ch;
  font-size: 1.25rem;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

.hero__actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }

/* ═════ À PROPOS ═════ */

.about {
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-ink);
}
.about__grid {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-lg);
  align-items: start;
}
.about__bio p { margin-bottom: var(--space-sm); font-size: 1.125rem; max-width: 55ch; }
.about__bio strong { font-weight: 700; }

.about__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: var(--space-md);
}
.tag {
  display: inline-block;
  padding: .4rem 1rem;
  border: 2px solid var(--color-ink);
  font-size: .875rem;
  font-weight: 500;
}

/* ═════ PROJETS ═════ */

.projects {
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-ink);
  background: var(--color-surface);
}
.projects__header {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
  margin-bottom: var(--space-lg);
}

/* Filtres */
.filters {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: var(--space-md);
}
.filter-btn {
  padding: .6rem 1.25rem;
  border: 3px solid var(--color-ink);
  background: transparent;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .9375rem;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover { background: var(--color-ink); color: var(--color-bg); }
.filter-btn.is-active { background: var(--color-ink); color: var(--color-bg); }

.projects__grid {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.project-card {
  border: 3px solid var(--color-ink);
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transform: translate(-6px, -6px);
  box-shadow: 8px 8px 0 var(--color-ink);
}

.project-card.is-hidden { display: none; }

.project-card__visual {
  aspect-ratio: 4 / 3;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 3px solid var(--color-ink);
}
.project-card__emoji { font-size: 3rem; }

.project-card__body { padding: var(--space-sm); flex: 1; }
.project-card__type {
  font-size: .8125rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-red);
  margin-bottom: .5rem;
}
.project-card__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: .5rem;
}
.project-card__desc { color: var(--color-muted); margin-bottom: var(--space-sm); }
.project-card__roles {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.project-card__roles li {
  font-size: .75rem;
  font-weight: 500;
  padding: .25rem .6rem;
  background: var(--color-bg);
  border: 2px solid var(--color-ink);
}

/* ═════ MÉTHODE ═════ */

.method {
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-ink);
}
.method__header {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
  margin-bottom: var(--space-lg);
}
.method__steps {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.method-step {
  padding-top: var(--space-sm);
}

.method-step__num {
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 0.5;
  display: inline-block;
  margin-bottom: 1rem;
  padding-inline: 0.2rem;
  background: var(--color-yellow);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.method__highlight {

}
.method-step__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  margin-bottom: .5rem;
}
.method-step__desc { font-size: .9375rem; color: var(--color-muted); }

/* ═════ CONTACT ═════ */

.contact {
  background: var(--color-ink);
  color: var(--color-bg);
  padding: var(--space-2xl) var(--space-sm);
  text-align: center;
}
.contact__inner { max-width: 700px; margin-inline: auto; }
.contact__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.05;
  margin-bottom: var(--space-sm);
}
.contact__text { font-size: 1.125rem; margin-bottom: var(--space-md); opacity: .85; }
.contact__actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ═════ FOOTER ═════ */

.site-footer {
  background: var(--color-ink);
  color: var(--color-bg);
  padding: var(--space-md) var(--space-sm);
  text-align: center;
  font-size: .875rem;
  opacity: .85;
}
.site-footer__note { margin-top: .25rem; font-size: .8125rem; opacity: .7; }

/* ═════ RESPONSIVE ═════ */

/* Tablette */
@media (max-width: 1024px) {
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
  .method__steps { grid-template-columns: repeat(3, 1fr); }
  .about__grid { grid-template-columns: 1fr; }
}

/* Mobile */
@media (max-width: 680px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    border-bottom: 2px solid var(--color-ink);
    transform: translateX(100%);
    transition: transform var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .nav-menu.is-open { transform: translateX(0); }
  .nav-menu ul {
    flex-direction: column;
    gap: var(--space-md);
    font-size: 1.5rem;
  }

  .projects__grid { grid-template-columns: 1fr; }
  .method__steps { grid-template-columns: 1fr; }

  .hero { min-height: auto; padding: var(--space-sm); }
  .hero__content { padding: var(--space-md); }
  .shape--circle { width: 180px; height: 180px; }
  .shape--square { width: 120px; height: 120px; }

  .hero__actions { flex-direction: column; }
  .btn { text-align: center; }
}