* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

body {
  background: #0b0d12;
  color: #fff;
}

html {
  scroll-behavior: smooth;
}

/* NAV BAR */

section {
  scroll-margin-top: 90px;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(5, 6, 10, 0.7);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-inner {
  max-width: 1200px;
  margin: auto;
  padding: 1rem 10%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 600;
  letter-spacing: 0.5px;
  opacity: 0.9;
}

.nav-links a {
  margin-left: 2rem;
  text-decoration: none;
  color: white;
  opacity: 0.7;
  transition: opacity 0.3s;
}

.nav-links a:hover {
  opacity: 1;
}

/* EXPERTISE */

.expertise {
  padding: 5rem 10%;
  background: #0b0d12;
}

.expertise h2 {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  text-align: center;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 3rem;
}

.expertise-item {
  text-align: center;
  padding: 2rem;
  background: #141824;
  border-radius: 18px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.expertise-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.expertise-item img {
  width: 48px;
  height: 48px;
  margin-bottom: 1.2rem;
}

.expertise-item h3 {
  margin-bottom: 0.8rem;
  font-size: 1.2rem;
}

.expertise-item p {
  font-size: 0.95rem;
  line-height: 1.5;
  opacity: 0.75;
}

/* HERO */
.hero {
  position: relative;
  height: 100vh;
  overflow: hidden;
}

.hero-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.4);
}

.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.avatar {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 3px solid #fff;
  margin-bottom: 1.5rem;
  object-fit: cover;
}

.hero h1 {
  font-size: 3rem;
}

.hero p {
  opacity: 0.8;
}

/* PROJECTS */
.projects {
  padding: 5rem 10%;
}

.projects h2 {
  margin-bottom: 2rem;
  font-size: 2.5rem;
  text-align: center;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.card {
  background: #141824;
  border-radius: 16px;
  padding: 1rem;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.card img {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.card h3 {
  margin-bottom: 0.5rem;
}

.tags span {
  background: #1f2440;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  margin-right: 0.4rem;
}

.tags {
  margin-bottom: 1rem;
}

/* MODAL */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: none;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: #0f1320;
  max-width: 900px;
  width: 90%;
  padding: 2rem;
  border-radius: 20px;
}

.modal-content img {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.close {
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  float: right;
  cursor: pointer;
}

/* CONTACT */
.contact {
  padding: 4rem 10%;
  background: #05060a;
  text-align: center;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.contact-links a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: white;
  text-decoration: none;
  font-size: 1rem;
  opacity: 0.85;
  transition: opacity 0.3s, transform 0.3s;
}

.contact-links a:hover {
  opacity: 1;
  transform: translateY(-3px);
}

.contact-links img {
  width: 22px;
  height: 22px;
}

.location {
  font-size: 0.9rem;
  opacity: 0.6;
}

/* TABLETTE */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* MOBILE */
@media (max-width: 640px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .projects {
    padding: 4rem 6%;
  }
}