/* =========================================================
   RESPONSIVE.CSS — Mobile uniquement (max-width: 768px)
   À linker APRÈS style.css et projects.css dans le <head>
   Ne modifie AUCUN style desktop.
   ========================================================= */

/* ── MENU BURGER ── */
.burger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1100;
}

.burger-btn span {
  display: block;
  width: 26px;
  height: 3px;
  background-color: var(--dark);
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* État ouvert du burger */
.burger-btn.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.burger-btn.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.burger-btn.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ── MENU MOBILE (panneau déroulant) ── */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: #fff;
  z-index: 1050;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 32px;
  padding: 80px 24px 40px;
}

.mobile-menu.open {
  display: flex;
  animation: menuSlideIn 0.3s ease forwards;
}

@keyframes menuSlideIn {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.mobile-menu a {
  text-decoration: none;
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
  font-family: var(--font);
  transition: color 0.2s;
}

.mobile-menu a:hover {
  color: var(--pink);
}

.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--dark);
  line-height: 1;
}

/* ── BREAKPOINT PRINCIPAL : 768px ── */
@media (max-width: 768px) {

  /* NAV */
  .nav-links {
    display: none !important;
  }

  .burger-btn {
    display: flex;
  }

  .nav-container {
    padding: 0 20px;
  }

  /* HERO */
  .hero-section {
    padding: 40px 20px 60px;
  }

  .hero-container {
    flex-direction: column-reverse;
    align-items: center;
    gap: 30px;
    text-align: center;
  }

  .hero-text-column {
    margin-left: 0;
    align-items: center;
    text-align: center;
  }

  .hero-title {
    font-size: 36px;
    align-items: center;
  }

  .hero-title .line2,
  .hero-title .line3 {
    text-align: center;
  }

  .home__blob {
    margin-right: 0;
    width: 260px;
  }

  /* BANNER */
  .banner-contenair {
    margin: 0 16px;
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .banner-text .num {
    font-size: 56px;
  }

  .banner-icons {
    width: 100%;
    padding: 0;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .icon-box img {
    height: 42px;
  }

  /* ABOUT */
  .about-me-section {
    padding: 50px 20px;
  }

  .about-me-title {
    font-size: 28px;
  }

  .about-me-content p {
    font-size: 15px;
  }

  /* SERVICES */
  .services-section {
    padding: 40px 20px;
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* SKILLS */
  .skills-section {
    padding: 40px 20px;
  }

  .skills-main-title {
    font-size: 26px;
  }

  .skills-filters {
    flex-wrap: wrap;
    gap: 10px;
  }

  .filter-btn {
    padding: 8px 18px;
    font-size: 11px;
  }

  .skills-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .skills-cat-title {
    width: 100%;
    font-size: 17px;
  }

  .skills-icons {
    gap: 16px;
  }

  /* PROJECTS */
  .projects-wrapper {
    padding: 0 16px;
  }

  #projects {
    margin: 0;
    padding: 40px 0;
  }

  .section-title {
    font-size: 26px;
    margin-bottom: 20px;
    margin-left: 0;
  }

  .project-filters {
    flex-wrap: wrap;
    gap: 10px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .project-card {
    width: 100%;
    height: 420px;
  }

  .project-intro {
    font-size: 15px;
    margin: 24px 0;
  }

  /* EXPERIENCE / TIMELINE */
  .experience-section {
    padding: 50px 20px;
  }

  .tl-item {
    flex-direction: column;
    padding-left: 24px;
    border-left: 3px solid var(--dark);
    margin-left: 12px;
    min-height: unset;
    gap: 12px;
  }

  .tl-content {
    width: 100%;
    padding: 0;
  }

  .tl-left,
  .tl-right {
    padding: 0;
    text-align: left;
  }

  .tl-center {
    display: none;
  }

  .tl-title {
    font-size: 15px;
  }

  .tl-text {
    font-size: 14px;
  }

  .tl-image-circle {
    width: 90px;
    height: 90px;
    margin: 0;
  }

  /* FOOTER / CONTACT */
  #contact {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 20px;
  }

  .footer-tagline {
    font-size: 16px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .btn-envoyer {
    align-self: stretch;
    justify-content: center;
  }

  /* OVERLAY */
  .overlay-box {
    border-radius: 20px;
  }

  .overlay-body {
    padding: 20px 20px 28px;
  }

  .overlay-title {
    font-size: 18px;
  }

  #overlay-img {
    height: 180px;
  }
}

/* ── BREAKPOINT TABLETTE : 480px–768px ── */
@media (min-width: 481px) and (max-width: 768px) {
  .hero-title {
    font-size: 42px;
  }

  .home__blob {
    width: 300px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

/* ── TRÈS PETIT ÉCRAN : < 400px ── */
@media (max-width: 400px) {
  .hero-title {
    font-size: 30px;
  }

  .nav-logo {
    font-size: 48px;
    letter-spacing: -7px;
  }

  .project-card {
    height: 380px;
  }
}
