/* ══════════════════════════════════════════
   BASE.CSS — Estilos compartilhados do Blog
   Contém: reset, variáveis, header, footer,
   tag, whatsapp-float e utilitários.
══════════════════════════════════════════ */

/* ── Variáveis — Tema escuro (padrão) ── */
:root {
  --bg-color:      #0a0f14;
  --surface-color: #0e1620;
  --border-color:  rgba(92,223,242,0.12);
  --text-color:    #f1f5f9;
  --primary-color: #5cdff2;
  --btn-text:      #0a0f14;
  --muted:         #8fa3b8;
  --font:          'Outfit', sans-serif;
  --radius:        16px;
  --transition:    0.3s ease;
  --nav-h:         72px;
}

/* ── Variáveis — Tema claro ── */
html.light {
  --bg-color:      #f0f4f8;
  --surface-color: #ffffff;
  --border-color:  rgba(14,165,192,0.18);
  --text-color:    #0d1b2a;
  --primary-color: #0ea5c0;
  --btn-text:      #ffffff;
  --muted:         #4a6080;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: var(--primary-color); border-radius: 10px; }

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10,15,20,0.8);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition), box-shadow var(--transition);
}

html.light .site-header {
  background: rgba(240,244,248,0.88);
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-color);
  text-decoration: none;
  flex-shrink: 0;
}

.logo span { color: var(--primary-color); }

/* Nav */
.nav { display: flex; align-items: center; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-list a {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  position: relative;
  transition: color var(--transition);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--primary-color);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-list a:hover,
.nav-list a[aria-current="page"] { color: var(--primary-color); }

.nav-list a:hover::after,
.nav-list a[aria-current="page"]::after { width: 100%; }

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.theme-toggle,
.menu-toggle {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}

.theme-toggle:hover,
.menu-toggle:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.theme-toggle svg,
.menu-toggle svg { width: 18px; height: 18px; }

.menu-toggle { display: none; }

/* Mobile menu overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--nav-h);
  background: var(--bg-color);
  z-index: 999;
  padding: 40px 24px;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  transform: translateX(100%);
  transition: transform var(--transition);
}

.mobile-nav.open { transform: translateX(0); }

.mobile-nav a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--muted);
  transition: color var(--transition);
}

.mobile-nav a:hover { color: var(--primary-color); }

/* ── Tag badge ── */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(92,223,242,0.1);
  color: var(--primary-color);
  border: 1px solid rgba(92,223,242,0.2);
  margin-bottom: 10px;
}

html.light .tag {
  background: rgba(0,119,255,0.08);
  border-color: rgba(0,119,255,0.18);
}

/* ── Footer ── */
.rodape {
  background: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: 60px 24px 32px;
}

.rodape-container {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.rodape-nome {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.rodape-descricao {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
}

.rodape-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rodape-links a {
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--transition);
}

.rodape-links a:hover { color: var(--primary-color); }

.rodape-social {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.rodape-social a {
  width: 38px; height: 38px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted);
  transition: all var(--transition);
}

.rodape-social a:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.rodape-social svg { width: 18px; height: 18px; }

.rodape-copy {
  max-width: 1100px;
  margin: 0 auto;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

/* ── WhatsApp float ── */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  z-index: 900;
  box-shadow: 0 6px 24px rgba(37,211,102,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(37,211,102,0.55);
}

.whatsapp-float svg { width: 24px; height: 24px; }

/* ── Responsivo ── */
@media (max-width: 900px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }
}

@media (max-width: 768px) {
  .rodape-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .rodape-social { flex-wrap: wrap; }

  .whatsapp-float { bottom: 20px; right: 20px; width: 48px; height: 48px; }
}