/* ========= Variáveis (ajuste as cores quando quiser) ========= */
:root{
  --bg:#0e0b0f;
  --panel:#111218;
  --text:#f5f5f5;
  --muted:#a8a8a8;
  --primary:#87cefa;       /* claro */
  --primary-dark:#2a2a4b;  /* escuro */
  --accent:#00bcd4;
  --border:#1f2230;
  --radius:14px;
  --container:1100px;
}

/* ========= Reset básico ========= */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height:1.6;
  color:var(--text);
  background:
    radial-gradient(1000px 400px at 10% -20%, rgba(135,206,250,0.12), transparent 60%),
    radial-gradient(800px 300px at 90% -10%, rgba(42,42,75,0.25), transparent 60%),
    var(--bg);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ========= Layout utilitários ========= */
.container{max-width:var(--container); margin:0 auto; padding:0 20px}
.narrow{max-width:800px}
.section{padding:96px 0; scroll-margin-top:96px}
.section.alt{background-color:#0f111a}
h1,h2{font-family:Poppins, Inter, sans-serif; line-height:1.2; margin:0 0 16px}
h1{font-size:clamp(28px, 4vw, 44px); font-weight:700}
h2{font-size:clamp(22px, 3vw, 32px); font-weight:700}
.kicker{text-transform:uppercase; letter-spacing:.12em; color:var(--muted); font-weight:600; margin-bottom:8px}

/* ========= Header fixo ========= */
.site-header{
  position:sticky; top:0; z-index:1000;
  backdrop-filter:saturate(140%) blur(8px);
  background:linear-gradient(90deg, rgba(42,42,75,.85), rgba(135,206,250,.15));
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex; align-items:center; gap:20px; height:72px}
.logo{font-weight:700; font-family:Poppins, Inter, sans-serif; font-size:22px}
.logo span{color:var(--primary)}

.menu{margin-left:auto; display:flex; gap:20px; align-items:center}
.menu a{opacity:.9; transition:.2s}
.menu a:hover{opacity:1; color:var(--primary)}
.btn{border:1px solid var(--border); padding:10px 14px; border-radius:999px; background:#141624; display:inline-block}
.btn:hover{border-color:var(--accent)}
.btn-primary{background:linear-gradient(135deg, var(--primary-dark), var(--primary)); color:#0a0a0a; font-weight:700}
.btn-primary:hover{filter:brightness(1.05)}

.nav-toggle{display:none; background:none; border:none; font-size:22px; color:var(--text)}

/* ========= Hero ========= */
.grid-2{display:grid; grid-template-columns:1.1fr .9fr; gap:40px; align-items:center}
.hero-cta{display:flex; gap:12px; flex-wrap:wrap; margin-top:16px}
.hero-media img{border-radius:var(--radius); border:1px solid var(--border); box-shadow:0 10px 40px rgba(0,0,0,.35)}

/* ========= Skills ========= */
.skills{display:flex; flex-wrap:wrap; gap:10px; padding:0; list-style:none}
.skills li{background:#141624; border:1px solid var(--border); padding:8px 12px; border-radius:999px}

/* ========= Filtros ========= */
.filters{display:flex; gap: 8px; margin:12px 0 22px;}
.chip{background:#0b0c0c; border:1px solid var(--border); padding:8px 12px; border-radius:999px; cursor:pointer}
.chip.is-active, .chip:hover{border-color:var(--accent); background:linear-gradient(135deg, var(--primary-dark), var(--primary)); color:#0a0a0a; font-weight:600}

/* ========= Cards de projetos ========= */
.cards{display:grid; grid-template-columns:repeat(3,1fr); gap:20px}
.card{
  background:#030408; border:1px solid var(--border); border-radius:var(--radius);
  overflow:hidden; display:flex; flex-direction:column; box-shadow:0 8px 24px rgba(0, 0, 0, 0.25)
}
.card img{aspect-ratio:16/9; object-fit:cover}
.card-body{padding:16px}
.card-tags{display:flex; gap:8px; margin:6px 0 10px}
.tag{font-size:12px; padding:4px 8px; border:1px solid var(--border); border-radius:999px; color:var(--muted)}
.card-actions{display:flex; gap:10px; padding:14px 16px 18px}

/* ========= Certificados ========= */
.certs{list-style:none; padding:0; margin:0; display:grid; gap:8px}
.certs a{padding:12px 14px; display:block; border:1px solid var(--border); border-radius:10px; background:#141624}
.certs a:hover{border-color:var(--accent)}

/* Itens expansíveis (Estudonauta) */
.certs details{
  border:1px solid var(--border);
  border-radius:10px;
  background:#141624;
  padding:10px 12px;
}
.certs details + details{margin-top:8px}
.certs summary{
  cursor:pointer;
  list-style:none;
  font-weight:600;
}
.certs summary::-webkit-details-marker{display:none}

/* Botões menores e alinhados dentro do Estudonauta */
.cert-buttons{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:12px;
}
.cert-buttons .btn{
  padding:6px 12px;           /* menor que o padrão */
  font-size:14px;             /* texto menor */
  border-radius:8px;
  background:linear-gradient(135deg, var(--primary-dark), var(--primary));
  color:#0a0a0a;
  border:1px solid var(--border);
  font-weight:600;
  box-shadow:0 3px 8px rgba(0,0,0,.25);
  transition:transform .2s ease, filter .2s ease;
}
.cert-buttons .btn:hover{
  filter:brightness(1.05);
  transform:scale(1.05);
}

/* ========= Contato ========= */
.contact{display:flex; gap:12px; flex-wrap:wrap; margin-top:10px}

/* ========= Footer ========= */
.site-footer{border-top:1px solid var(--border); background:#0d0f15}
.site-footer p{margin:0; padding:28px 0; text-align:center; color:var(--muted)}

/* ========= Responsividade ========= */
@media (max-width: 900px){
  .grid-2{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 640px){
  .cards{grid-template-columns:1fr}
  .menu{display:none; position:absolute; right:20px; top:72px; flex-direction:column; background:#0f111a; padding:16px; border:1px solid var(--border); border-radius:12px}
  .menu.open{display:flex}
  .nav-toggle{display:block; margin-left:auto}
}