/* Tema claro como padrão (variáveis) */
:root{
  --bg: linear-gradient(180deg,#ffffff 0%, #f3f4f6 100%);
  --card: #ffffff;
  --text: #0f1720;
  --muted: #6b7280;
  --accent: #3ecf8e;
  --glass: rgba(2,6,23,0.03);
  --overlay: rgba(2,6,23,0.06);
  --border: rgba(2,6,23,0.08);
}

/* Tema escuro ativado via body.dark-theme */
body.dark-theme {
  --bg: linear-gradient(180deg,#0b0f12 0%, #0f1720 100%);
  --card: #111318;
  --text: #ffffff;
  --muted: #9aa3a8;
  --accent: #3ecf8e;
  --glass: rgba(255,255,255,0.03);
  --overlay: rgba(2,6,23,0.6);
  --border: rgba(255,255,255,0.06);
}

/* aplicar variáveis ao layout */
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,system-ui,Segoe UI,Roboto,Arial;
  color:var(--text);
  background:var(--bg);
  transition: background 250ms ease, color 250ms ease;
}

.container{max-width:1100px;margin:0 auto;padding:28px}
header{position: top;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;gap:12px;align-items:center}
.brand h1{font-size:20px;margin:0}
nav a{color:var(--muted);text-decoration:none;margin-left:14px}
nav a:hover{color:var(--accent);transition:color 180ms ease;}
nav a.active{color:var(--accent);font-weight:600}

/* HERO */
.hero{display:grid;grid-template-columns:1fr;gap:18px;align-items:center;padding:28px;background:linear-gradient(90deg, rgba(62,207,142,0.06), transparent);border-radius:12px;margin-top:18px}
.hero h2{margin:0;font-size:28px}
.hero p{color:var(--muted);margin:8px 0 0}

/* Sections */
section{margin-top:28px}
h3{margin:0 0 12px 0;font-size:20px}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.card{
  background:var(--card);
  padding:16px;
  border-radius:10px;
  /* sombra mais neutra para funcionar em ambos os temas */
  box-shadow: 0 6px 18px rgba(2,6,23,0.06);
}
.project-card h4{margin:0 0 8px}
.techs{color:var(--muted);font-size:13px;margin-top:8px}
.btn{display:inline-block;padding:8px 12px;border-radius:8px;text-decoration:none;background:var(--accent);color:#021014;font-weight:600}

/* Team */
.member{display:flex;gap:12px;align-items:center}
.member img{width:72px;height:72px;border-radius:8px;object-fit:cover}
.socials a{display:inline-block;margin-right:8px;color:var(--muted);text-decoration:none}

/* Project modal */
.modal{
  position:fixed;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  /* overlay agora segue o tema */
  background: var(--overlay);
  padding:24px;
}
.modal .dialog{
  max-width:880px;
  width:100%;
  /* dialog usa cor do card e texto segue a variável de tema */
  background: var(--card);
  color: var(--text);
  padding:18px;
  border-radius:12px;
}
.modal.show{display:flex}

/* Contact form */
form input, form textarea{
  width:100%;
  padding:10px;
  border-radius:8px;
  /* borda e fundo seguem variáveis do tema */
  border:1px solid var(--border);
  background:var(--glass);
  color:var(--text);
  margin-top:8px;
}
form label{font-size:14px;color:var(--muted)}
.small{font-size:13px;color:var(--muted)}

/* filtros: escondido por padrão; .show exibe como linha flex */
#filters { display: none; gap:12px; flex-wrap:wrap; margin-bottom:12px; align-items:center; }
#filters.show { display: flex; }

/* cada grupo de filtros em linha */
.filter-group { display: flex; gap:8px; align-items:center; margin-right:12px; }

/* melhora visual do label/checkbox inline */
.filter-group label { display: inline-flex; align-items: center; gap:6px; cursor: pointer; color:var(--muted); font-size:14px; }

/* botão de limpar dentro do painel */
#filters .btn { margin-left: 8px; }

/* Responsive */
@media (max-width:900px){.grid-3{grid-template-columns:repeat(2,1fr)}.hero h2{font-size:24px}}
@media (max-width:600px){header{flex-direction:column;align-items:flex-start}.grid-3{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}.hero{padding:18px}.brand h1{font-size:18px}}

/* Comments */
.comments-list .comment { background: rgba(255,255,255,0.02); padding:8px; border-radius:8px; }
.comment .small, .comment button.small { color:var(--muted); background:transparent; border:0; cursor:pointer; }
.comment .meta { color: var(--muted); font-size:13px; }
.comment .body { margin-top:6px; }
/* admin small tweaks */
#adminArea .card { margin-bottom:10px; }

footer{
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  margin-top: 60px;
  padding: 40px 20px 20px;
  margin:28px 0 1px;color:var(--muted);font-size:13px;text-align:center
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto 30px;
}

.footer-section h4 {
  color: var(--text-color);
  margin-bottom: 16px;
  font-size: 16px;
  font-weight: 600;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section li {
  margin-bottom: 10px;
}

.footer-section a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: var(--primary);
}

.social-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.social-links li {
  margin-bottom: 0;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* Botão voltar ao topo */
.back-to-top{
  position: fixed;
  right: 20px;
  bottom: 22px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--primary, #3ecf8e); /* usa cor principal da página se existir */
  color: var(--on-primary, #ffffff);
  box-shadow: 0 8px 20px rgba(11,108,255,0.12);
  border: none;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 9999;
  font-size: 20px;
  line-height: 1;
}

/* visível */
.back-to-top.visible{
  opacity: 1;
  transform: translateY(0);
}

/* acessibilidade e foco */
.back-to-top:focus{
  outline: 2px solid color-mix(in srgb, var(--primary, #3ecf8e) 40%, white);
  outline-offset: 3px;
}

/* hover */
.back-to-top:hover{
  filter: brightness(0.95);
}

/* respeitar redução de movimento */
@media (prefers-reduced-motion: reduce){
  .back-to-top { transition: none; }
}

/* theme toggle: canto superior direito */
.theme-toggle{
  position:fixed;
  top:20px;
  right:20px;
  z-index:10000;
  display:flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  border-radius:12px;
  background:var(--card);
  color:var(--text);
  border:1px solid var(--border);
  box-shadow: 0 8px 24px rgba(2,6,23,0.08);
  cursor:pointer;
  font-size:20px;
  transition:background 180ms ease, transform 120ms ease;
}

/* hover / focus estados */
.theme-toggle:hover{ transform: scale(1.03); }
.theme-toggle:focus{ outline: 2px solid color-mix(in srgb, var(--accent) 55%, white); outline-offset:4px; }

/* proteger sobreposição em larguras pequenas */
@media (max-width:420px){
  .theme-toggle{ top:16px; right:16px; }
}