:root {
  --primary: #4f46e5;
  --fg: #111827;
  --bg: #f3f4f6;
  --transition: 0.4s ease;
  scroll-behavior: smooth;
}
[data-theme="dark"] {
  --bg: #111827;
  --fg: #f3f4f6;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--fg);
  transition: background var(--transition), color var(--transition);
}

/* Header translucide, blur & responsive */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  transition: background var(--transition);
  z-index: 100;
}
[data-theme="dark"] header {
  background: rgba(17,24,39,0.8);
}
.header-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
}
.burger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
}
.burger span {
  display: block;
  height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: background var(--transition);
}
.nav-links {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}
[data-theme="dark"] .nav-links {
  background: rgba(17,24,39,0.9);
}
.nav-links.open {
  max-height: 300px;
}
.nav-links ul {
  list-style: none;
  margin: 0;
  padding: 1rem 0;
  text-align: center;
}
.nav-links li {
  margin: 0.5rem 0;
}
.nav-links a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  display: block;
  padding: 0.5rem;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}
.nav-links a:hover::after {
  width: 100%;
}
@media (min-width: 768px) {
  .burger {
    display: none;
  }
  .nav-links {
    position: static;
    display: flex;
    max-height: none;
    background: transparent;
  }
  .nav-links ul {
    display: flex;
    gap: 1.5rem;
    padding: 0;
  }
  .nav-links li {
    margin: 0;
  }
}

main {
  margin-top: 5rem;
}
section {
  min-height: calc(100vh - 5rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
}

/* Avatar style */
.avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--primary);
  margin-bottom: 1rem;
}
.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* À propos - marge côtés en desktop */
@media (min-width: 768px) {
  #about p {
    padding: 0 8rem;
  }
}

/* Expériences uniforme */
.experience-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  column-gap: 1rem;
  margin-bottom: 2rem;
}
.experience-item h3 {
  margin: 0;
}
.experience-item span {
  font-size: 0.875rem;
  color: var(--fg);
}
.experience-item ul {
  list-style: none;
  padding-left: 1rem;
  margin: 0.5rem 0 0;
  grid-column: 1 / -1;
}

/* Compétences encadrées */
.skills-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}
.skills-list li {
  border: 1px solid var(--primary);
  padding: 0.5rem 1rem;
  border-radius: 0.25rem;
}

/* Projects styling */
.carousel {
  position: relative;
  margin: 2rem auto;
  max-width: 1000px;
}
.carousel-track-container {
  overflow: hidden;
}
.carousel-track {
  display: flex;
  transition: transform var(--transition);
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary);
  border: none;
  color: #fff;
  padding: 0.5rem;
  font-size: 1.5rem;
  cursor: pointer;
  border-radius: 50%;
  z-index: 1;
}
.prev {
  left: 10px;
}
.next {
  right: 10px;
}
.project-card {
  flex: 0 0 auto;
  background: var(--bg);
  color: var(--fg);
  border-radius: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 1rem;
  margin: 0 10px;
  transition: transform var(--transition);
}
.project-card:hover {
  transform: translateY(-5px);
}
.project-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
}
.project-link {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}
.project-link:hover {
  background: #3730a3;
  transform: translateY(-2px);
}

/* Contact mail icon */
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition);
}
.contact-link:hover {
  color: #3730a3;
}
.mail-icon {
  flex-shrink: 0;
}

/* Buttons style */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--primary);
  color: #fff;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: transform var(--transition);
  font-weight: 600;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn.outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}