:root{
  --bg:#0b0e12;
  --panel:#0f1720;
  --muted:#9aa4b2;
  --accent:#2dd4bf;
  --accent-2:#7c3aed;
  --card:#0b1116;
  --glass: rgba(255,255,255,0.03);
  --radius:12px;
  --container:1100px;
  --gap:18px;
  font-family: system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:#e6eef6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
}

/* Header with background gif */
.site-header{
  position:relative;
  display:block;
  min-height:300px;
  background-image: url('images/coding.gif');
  background-size:cover;
  background-position:center;
  color:#fff;
  overflow:hidden;
}
.site-header.small{ min-height:160px }

.site-header .overlay{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(6,9,12,0.6) 0%, rgba(6,9,12,0.85) 60%);
  backdrop-filter: blur(2px);
}

/* header inner content */
.header-inner{
  position:relative;
  z-index:2;
  max-width:var(--container);
  margin:0 auto;
  padding:28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.brand h1{ margin:0; font-size:1.6rem; letter-spacing:1px; }
.brand .tagline{ margin:0; color:var(--muted); font-size:0.95rem }

/* ===== NAVIGATION ===== */
.main-nav {
  flex-grow: 1;
  display: flex;
  justify-content: center;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav li {
  display: inline-block;
}

.main-nav a {
  color: #ffffff;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(6px);
}

.main-nav a:hover {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #04111a;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.main-nav a.active {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #04111a;
  box-shadow: 0 4px 15px rgba(0,0,0,0.4);
}

/* Ajustement mobile */
@media (max-width:900px){
  .main-nav {
    justify-content: flex-start;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 10px;
  }
}



/* responsive nav toggle */
.nav-toggle{
  display:none;
  background:transparent;
  border:1px solid rgba(255,255,255,0.06);
  color:#fff;
  padding:8px 10px;
  border-radius:8px;
}

.container{
  max-width:var(--container);
  margin: 28px auto;
  padding: 0 20px;
}

/* Intro */
.intro{ display:flex; gap:24px; align-items:flex-start; }
.intro-left{ flex:1; }
.intro-right{ width:320px; }

/* cards */
.card{
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:var(--radius);
  padding:18px;
  box-shadow: 0 6px 18px rgba(2,6,12,0.6);
}

/* buttons */
.btn{
  display:inline-block;
  background: linear-gradient(90deg,var(--accent),var(--accent-2));
  color:#04111a;
  padding:10px 14px;
  border-radius:10px;
  font-weight:700;
  text-decoration:none;
  border:none;
  cursor:pointer;
}
.btn.ghost{
  background:transparent;
  color:var(--accent);
  border:1px solid rgba(255,255,255,0.06);
}

/* highlights */
.highlights{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:24px; }
.highlight{ background:var(--card); padding:16px; border-radius:12px; box-shadow: 0 6px 12px rgba(0,0,0,0.4) }
.highlight h4{ margin:0 0 8px 0 }
.highlight p{ color:var(--muted); margin:0 0 12px 0 }

/* posts grid */
.posts-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:12px; }
.post{ background:var(--panel); padding:14px; border-radius:10px; }
.post h5{ margin:0 0 8px 0 }
.post p{ color:var(--muted); margin:0 0 12px 0 }
.post-link{ color:var(--accent); font-weight:600 }

/* projects */
.projects-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.project-card{ background:var(--card); padding:18px; border-radius:12px }

/* contact form */
.contact-form label{ display:block; margin-bottom:12px; color:var(--muted); font-size:0.95rem }
.contact-form input, .contact-form textarea{
  display:block; width:100%; padding:10px; margin-top:6px;
  border-radius:8px; background:#061016; color:#eaf6fb; border:1px solid rgba(255,255,255,0.04);
}
.form-actions{ display:flex; gap:12px; margin-top:8px; align-items:center }
.form-status{ margin-top:10px; color:var(--accent); }

/* footer */
.site-footer{ padding:18px 0; background:#06070a; color:var(--muted); text-align:center; }

/* back to top */
#backToTop{
  position:fixed; right:18px; bottom:18px; display:none;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  color:#04111a; border:none; padding:10px 12px; border-radius:999px; cursor:pointer;
  box-shadow:0 8px 20px rgba(0,0,0,0.6);
}

/* responsive */
@media (max-width:900px){
  .intro{ flex-direction:column }
  .intro-right{ width:100% }
  .highlights{ grid-template-columns:1fr }
  .posts-grid{ grid-template-columns:1fr }
  .projects-grid{ grid-template-columns:1fr }
  .main-nav{ position:absolute; right:20px; top:80px; display:none; background:rgba(2,6,12,0.9); padding:12px; border-radius:10px }
  .nav-toggle{ display:block }
  .header-inner{ align-items:flex-start }
}

@media (max-width:480px){
  .header-inner{ padding:12px }
  .brand h1{ font-size:1.2rem }
}



.counter {
  text-align: center;
  margin-top: 40px;
  padding: 20px;
  background: var(--card);
  border-radius: 10px;
  color: var(--accent);
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}