:root{
  --accent:#2dd4bf;
  --text:#e6eef6;
  --muted:#9aa4b2;
  --bg:#0f1724;
  font-family: Inter, sans-serif;
}

/* Reset */
*{margin:0;padding:0;box-sizing:border-box;}

html,body{height:100%;}
body{
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  scroll-behavior: smooth;
}

/* NAVBAR */
nav{
  position:fixed;
  top:0;left:0;right:0;
  background:#1e293b;
  padding:18px 36px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  z-index:1000;
  box-shadow:0 2px 15px rgba(0,0,0,0.6);
}
.logo{font-weight:700;font-size:1.25rem;color:#38bdf8;}
nav ul{list-style:none;display:flex;gap:26px;align-items:center;}
nav a{color:#f1f5f9;text-decoration:none;font-weight:600;font-size:1.05rem;transition:color .25s;}
nav a:hover{color:#38bdf8;transform:scale(1.03);}

/* lien actif dans la navbar */
nav a.active {
  color: var(--accent);
  text-shadow: 0 0 8px rgba(45,212,191,0.6);
}

/* burger (hidden desktop) */
.burger{display:none;background:none;border:0;color:var(--text);font-size:1.6rem;cursor:pointer;padding:6px 8px;border-radius:6px;}
.burger:active{transform:scale(.98);}

/* HERO */
.hero{
  position:relative;
  height:100vh;
  width:100%;
  display:flex;
  justify-content:center;
  align-items:center;
  text-align:center;
  overflow:hidden;
  padding-top:70px; /* espace si nav recouvre */
}
.hero canvas{position:absolute;top:0;left:0;width:100%;height:100%;z-index:0;display:block;}
.hero::after{content:"";position:absolute;inset:0;background:rgba(15,23,36,0.6);z-index:0;}
.hero-content{position:relative;z-index:1;max-width:900px;padding:16px;}
.hero h1{font-size:clamp(2rem,6vw,3.5rem);margin-bottom:.5rem;}
.hero p{font-size:clamp(1rem,3vw,1.2rem);color:var(--muted);margin-bottom:1.5rem;}
.scroll-btn{display:inline-block;padding:10px 20px;border-radius:8px;background:var(--accent);color:#042026;font-weight:700;text-decoration:none;}

/* SECTIONS (sauf hero) */
section:not(.hero){padding:100px 20px;max-width:1100px;margin:0 auto;scroll-margin-top:88px;}
h2{text-align:center;margin-bottom:1.5rem;font-size:clamp(1.6rem,3.5vw,2rem);}

/* ABOUT */
.about-container{display:flex;flex-wrap:wrap;gap:40px;align-items:center;justify-content:center;max-width:1000px;margin:auto;padding:20px;}
.about-img img{width:220px;height:220px;object-fit:cover;border-radius:50%;border:4px solid var(--accent);box-shadow:0 6px 20px rgba(0,0,0,0.5);}
.about-text{flex:1;min-width:260px;}
.about-text p{color:var(--muted);line-height:1.7;text-align:justify;margin-bottom:12px;}
/* Center the CV button but keep paragraph justified */
.about-text .btn-cv{display:block;margin:18px auto 0;width:fit-content;padding:10px 18px;border-radius:8px;background:var(--accent);color:#042026;font-weight:700;text-decoration:none;transition:transform .2s,background .2s;}
.about-text .btn-cv:hover{transform:translateY(-3px);background:#38bdf8;}

/* SKILLS (vertical cards) */
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;max-width:1200px;margin:0 auto;}
.skill-card{background:rgba(255,255,255,0.05);padding:20px;border-radius:12px;box-shadow:0 4px 15px rgba(0,0,0,0.4);text-align:center;transition:transform .25s;}
.skill-card:hover{transform:translateY(-6px);box-shadow:0 8px 25px rgba(0,0,0,0.5);}
.skill-icon{width:56px;height:56px;object-fit:contain;margin:0 auto 10px;display:block;}
.skill-card h3{margin:0 0 8px;font-size:1.05rem;font-weight:700;color:var(--accent);}
.skill-card p{margin:0;color:var(--muted);font-size:0.95rem;line-height:1.5;}

/* TIMELINE */
.timeline{position:relative;margin:40px auto;max-width:820px;padding-left:48px;border-left:3px solid var(--accent);}
.timeline-item{position:relative;margin-bottom:28px;}
.timeline-item::before{content:"";position:absolute;left:-12px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px rgba(45,212,191,0.6);}
.timeline-date{font-weight:700;color:var(--accent);margin-bottom:8px;padding-left:6px;}
.timeline-content{background:rgba(255,255,255,0.04);padding:14px 18px;border-radius:10px;box-shadow:0 4px 12px rgba(0,0,0,0.35);}

/* === EXPERIENCES === */
.experiences-section {
  text-align: center;
  padding: 100px 20px;
}

.experience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  max-width: 1100px;
  margin: 40px auto 0;
}

.experience-card {
  background: rgba(255,255,255,0.05);
  border-radius: 12px;
  padding: 25px 20px;
  text-align: left;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  transition: transform 0.3s, box-shadow 0.3s;
}

.experience-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.5);
}

.experience-card h3 {
  color: var(--accent);
  margin-bottom: 5px;
}

.experience-card h4 {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.experience-card p {
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* INTERESTS - big groups with inner small cards */
.interest-sections{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin-top:2rem;}
.interest-group{background:rgba(255,255,255,0.03);border-radius:14px;padding:18px;box-shadow:0 6px 20px rgba(0,0,0,0.35);}
.interest-group h3{text-align:center;font-size:1.2rem;margin-bottom:12px;color:var(--accent);}

/* inner small cards reuse .interest styles */
.interest-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;padding:0 6px;}
.interest{background:rgba(255,255,255,0.05);border-radius:12px;padding:16px;box-shadow:0 4px 12px rgba(0,0,0,0.35);text-align:left;}
.interest h4{color:var(--accent);margin-bottom:8px;}
.interest p{color:var(--muted);font-size:0.95rem;line-height:1.5;}

/* PROJECTS */
.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;padding:0 10px;}
.project{background:rgba(255,255,255,0.05);border-radius:12px;padding-bottom:12px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,0.45);display:flex;flex-direction:column;transition:transform .25s;}
/* uniform images, centered, with small padding so they don't touch edges */
.project img{width:100%;height:160px;object-fit:contain;object-position:center;border-top-left-radius:8px;border-top-right-radius:8px;background:#0f172a;display:block;padding:12px;}
.project h3{padding:12px 16px 6px;font-size:1.1rem;}
.project p{padding:0 16px 18px;color:var(--muted);flex:1;}

/* LINKS (override nav color) */
a{color:var(--accent);text-decoration:none;transition:color .25s,text-shadow .25s;}
a:hover{color:#38bdf8;text-shadow:0 0 6px rgba(56,189,248,0.35);}
nav a{color:#f1f5f9;} /* nav links keep white */
#contact a{font-weight:600;font-size:1.02rem;}

/* CONTACT center */
#contact{text-align:center;margin-top:40px;}
#contact p{margin:10px 0;color:var(--muted);}

/* small helpers */
.container-center{max-width:1100px;margin:0 auto;padding:0 16px;}

/* CONTACT */
.contact {
  text-align: center;
  padding: 100px 20px;
}

.contact-container {
  display: flex;
  justify-content: center;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 2rem;
}

.contact-item {
  background: rgba(255,255,255,0.05);
  border-radius: 12px;
  padding: 25px 35px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.4);
  transition: transform 0.3s, box-shadow 0.3s;
  min-width: 250px;
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.5);
}

.contact-item h3 {
  color: var(--accent);
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.contact-item a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  word-break: break-all;
  transition: color 0.3s;
}

.contact-item a:hover {
  color: #38bdf8;
}

/* RESPONSIVE */

/* tablet */
@media (max-width:1024px){
  nav ul{gap:18px;}
  .timeline{padding-left:34px;}
  .interest-sections{grid-template-columns:1fr;} /* stack groups on narrower tablets */
}

/* mobile */
@media (max-width:768px){
  body{font-size:0.96rem;}
  section:not(.hero){padding:48px 14px;}

  /* burger nav */
  .burger{display:block;}
  nav ul{position:absolute;left:0;right:0;top:64px;background:#1e293b;flex-direction:column;display:none;padding:12px 20px;gap:12px;}
  nav.active ul{display:flex;}

  /* hero adjustments */
  .hero{padding-top:64px;height:78vh;}
  .hero-content h1{font-size:1.9rem;}

  /* about stack */
  .about-container{flex-direction:column;align-items:center;text-align:center;padding:6px;}
  .about-text p{text-align:left;} /* keep left text for readability on narrow screens */

  /* timeline simplified */
  .timeline{border-left:none;padding-left:0;max-width:100%;}
  .timeline-item::before{display:none;}
  .timeline-content{margin-left:0;}

  /* single column grids */
  .skills-grid,.projects-grid,.interest-grid{grid-template-columns:1fr;}
  .skill-card{text-align:center;}
  .skill-card .skill-icon{margin:0 auto;}

  nav{padding:12px 16px;}
  .logo{font-size:1.1rem;}
}

/* === CONTACT === */
.contact-section {
  text-align: center;
  padding: 100px 20px;
}

.contact-section p {
  color: var(--muted);
  margin-bottom: 25px;
  font-size: 1rem;
}

.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
}

.contact-btn {
  display: inline-block;
  padding: 12px 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--accent);
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s;
}

.contact-btn:hover {
  background: var(--accent);
  color: #042026;
  transform: translateY(-3px);
}

/* === FOOTER === */
.footer {
  text-align: center;
  padding: 25px 15px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: var(--muted);
  background: rgba(15,23,36,0.8);
  font-size: 0.9rem;
}

.back-to-top {
  display: inline-block;
  margin-top: 8px;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s;
}

.back-to-top:hover {
  color: #38bdf8;
}