/* ---------------- THEME ---------------- */
:root{
  --bg:#ffffff;
  --text:#0f172a;
  --muted:#4b5563;
  --panel:#ffffff;
  --border:#e5e7eb;
  --accent:#f97316;
  --shadow:0 4px 12px rgba(0,0,0,.08);
}
html[data-theme="dark"]{
  --bg:#0b1220;
  --text:#e5e7eb;
  --muted:#a3adc2;
  --panel:#0f1627;
  --border:#1e293b;
  --accent:#fb923c;
  --shadow:0 8px 20px rgba(0,0,0,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font-family:Inter,system-ui,Segoe UI,Roboto,sans-serif;
  line-height:1.6;
  transition:background .3s,color .3s;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:inherit;text-decoration:none}

/* -------------- LAYOUT -------------- */
.section{padding:72px 16px}
.container{max-width:1100px;margin:0 auto}
.about-header,.expertise-header{text-align:center;margin-bottom:28px}
h1,h2,h3{font-weight:800}
h1{font-size:2.25rem}
h2{font-size:2rem}
h3{font-size:1.1rem}
.tagline{color:var(--muted)}
.lead{max-width:900px;margin:0.8rem auto 1.2rem;text-align:center}

/* -------------- NAVBAR -------------- */
header{
  background:var(--bg);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:1000;
}
.navbar{
  max-width:1200px;
  margin:0 auto;
  padding:0.9rem 2rem;
  display:-webkit-flex;
  display:flex;
  -webkit-justify-content:space-between;
  justify-content:space-between;
  -webkit-align-items:center;
  align-items:center;
  flex-wrap:wrap;
}
.logo-bold{font-weight:800;color:var(--text)}
.logo-accent{color:var(--accent);font-weight:800}
.nav-links{
  display:-webkit-flex;
  display:flex;
  -webkit-flex-wrap:wrap;
  flex-wrap:wrap;
  -webkit-gap:1.8rem;
  gap:1.8rem;
}
.nav-links a{color:var(--text);font-weight:600}
.nav-links a:hover{color:var(--accent)}
.lang-switch{
  display:-webkit-flex;
  display:flex;
  gap:1rem;
  -webkit-align-items:center;
  align-items:center;
  border-left:1px solid var(--border);
  padding-left:1rem;
}
.lang-switch a{font-weight:700}
.theme-toggle{
  background:transparent;
  border:none;
  color:var(--text);
  font-size:1.1rem;
  cursor:pointer;
  transition:.2s transform;
}
.theme-toggle:hover{color:var(--accent);transform:scale(1.15)}

/* -------------- HERO -------------- */
.hero{background:linear-gradient(180deg,var(--panel),var(--bg))}
.hero .container{text-align:center}
.subtitle{color:var(--muted);max-width:760px;margin:.6rem auto 0}

/* -------------- ABOUT INFO CARDS -------------- */
#about .container{text-align:center}
.info-cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:14px;margin-top:16px;
  justify-content:center;text-align:center;
}
.info-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:8px;
  box-shadow:var(--shadow);
  -webkit-transform:translateZ(0);
  transform:translateZ(0);
}

/* -------------- ABOUT ILLUSTRATION -------------- */
.about-illustration{text-align:center;margin:1.8rem auto 2.4rem}
.about-illustration img{
  max-width:500px;width:90%;height:auto;
  border-radius:14px;box-shadow:var(--shadow);
  transition:transform .3s ease,box-shadow .3s ease;
  -webkit-transform:translateZ(0);
}
.about-illustration img:hover{
  transform:scale(1.03);
  -webkit-transform:scale(1.03);
  box-shadow:0 8px 24px rgba(0,0,0,.15);
}

/* -------------- EXPERTISE -------------- */
.expertise-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:18px;margin-top:18px;
}
.expertise-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:16px;
  padding:18px;
  text-align:left;
  box-shadow:var(--shadow);
  transition:.25s;
  -webkit-transform:translateZ(0);
}
.expertise-card:hover{
  transform:translateY(-3px);
  -webkit-transform:translateY(-3px);
}
.expertise-card .icon{font-size:1.6rem}
.expertise-card ul{list-style-position:inside;margin:.5rem 0 0;padding-left:0}
.expertise-card li{margin:.25rem 0}

/* -------------- EXPERIENCE TIMELINE -------------- */
.timeline{
  position:relative;
  max-width:800px;margin:0 auto;
  text-align:left;
  padding-left:20px;
  border-left:3px solid var(--accent);
}
.tl-item{margin-bottom:28px}
.tl-date{color:var(--accent);font-weight:800;margin-bottom:6px}
.tl-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  box-shadow:var(--shadow);
}
.tl-card .subtle{color:var(--muted);margin:.2rem 0 .4rem}
.tl-card ul{list-style-position:inside;padding-left:0;margin-top:.5rem}
.tl-card li{margin:.3rem 0}

/* -------------- TRAINING GRID -------------- */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:18px;
}
.grid .expertise-card h3{margin:.4rem 0}

/* -------------- CERTIFICATIONS (FLIP) -------------- */
.badge-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:18px;
  justify-items:center;
  margin:18px 0;
}
.badge-card{
  width:180px;
  height:200px;
  perspective:1200px;
  -webkit-perspective:1200px;
  position:relative;
  transform:translateZ(0);
  -webkit-transform:translateZ(0);
}
.badge-inner{
  position:relative;
  width:100%;height:100%;
  transform-style:preserve-3d;
  -webkit-transform-style:preserve-3d;
  transition:transform 0.7s ease;
  -webkit-transition:-webkit-transform 0.7s ease;
  will-change:transform;
}
.badge-card:hover .badge-inner{
  transform:rotateY(180deg);
  -webkit-transform:rotateY(180deg);
}
.badge-front,.badge-back{
  position:absolute;inset:0;
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--panel);
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  padding:.75rem;text-align:center;
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
  overflow:hidden;
  z-index:2;
}
.badge-front img{
  max-height:90px;
  object-fit:contain;
  margin-bottom:.35rem;
}
.badge-front p{margin:0;color:var(--text);font-weight:700}
.badge-back{
  transform:rotateY(180deg);
  -webkit-transform:rotateY(180deg);
  color:var(--text);
  font-size:.92rem;
  line-height:1.35;
  z-index:1;
}

/* -------------- CONTACT -------------- */
#contact .container{text-align:center}
#contact form{
  max-width:460px;margin:1.5rem auto 0;
  display:flex;flex-direction:column;gap:12px;text-align:left;
}
input,textarea{
  background:var(--panel);color:var(--text);
  border:1px solid var(--border);
  border-radius:12px;padding:.85rem 1rem;font-size:1rem;
}
button{
  background:var(--accent);color:#fff;
  border:none;border-radius:10px;
  padding:.9rem 1.2rem;font-weight:800;cursor:pointer;
}
button:hover{opacity:.95}
.form-status{color:var(--muted);font-size:.95rem;margin-top:.25rem}

/* -------------- FOOTER -------------- */
.footer{
  border-top:1px solid var(--border);
  text-align:center;
  color:var(--muted);
  padding:26px 16px;
  margin-top:18px;
}

/* -------------- RESPONSIVE -------------- */
@media (max-width:820px){
  .nav-links{gap:1rem;flex-wrap:wrap;justify-content:center}
  .section{padding:60px 14px}
}

/* ---------- SAFARI FALLBACKS ---------- */
@supports not (display: grid) {
  .info-cards,.expertise-grid,.badge-grid,.grid {
    display:flex;flex-wrap:wrap;justify-content:center;
  }
  .info-card,.expertise-card,.badge-card {
    flex:1 1 280px;margin:10px;
  }
}