/*
 * TechBlog Pro - CSS principal
 */
:root{
  /* Paleta padrão (dark) */
  --primary-color:#22d3ee; /* ciano tech */
  --accent-color:#a78bfa;  /* roxo neon */
  --text-color:#e5e7eb;
  --muted-color:#94a3b8;
  --bg:#0b1220;
  --bg-alt:#0f172a;
  --border:#1f2937;
}
/* Paleta alternativa (light) */
html[data-theme="light"]{
  --primary-color:#3b82f6; /* azul primário */
  --accent-color:#2563eb;  /* azul escuro para hover */
  --text-color:#0f172a;
  --muted-color:#475569;
  --bg:#ffffff;
  --bg-alt:#f8fafc;
  --border:#e2e8f0;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--text-color);background:var(--bg);line-height:1.6}
a{text-decoration:none;color:var(--primary-color);transition:color .2s ease, opacity .2s ease}
a:hover{color:var(--accent-color)}
img{max-width:100%;height:auto;display:block}
.container{width:min(1200px, 94%);margin:0 auto}

/* Header */
.site-header{border-bottom:1px solid var(--border);background:var(--bg)}
.header-inner{display:grid;grid-template-columns:1fr auto auto;gap:1rem;align-items:center;padding:1rem 0}
.branding .site-title{font-weight:700;font-size:1.3rem;color:var(--text-color)}
.branding .site-description{margin:0;color:var(--muted-color);font-size:0.9rem}
.nav-toggle{display:none;border:1px solid var(--border);background:var(--bg-alt);padding:.4rem .6rem;border-radius:.5rem;color:var(--text-color)}
/* Toggle de tema */
.theme-toggle{display:inline-flex;align-items:center;gap:.4rem;border:1px solid var(--border);background:var(--bg-alt);padding:.4rem .6rem;border-radius:.5rem;color:var(--text-color);cursor:pointer}
.theme-toggle:hover{border-color:var(--primary-color)}
.primary-nav .menu{list-style:none;display:flex;gap:1rem;margin:0;padding:0}
.primary-nav .menu a{padding:.5rem .6rem;border-radius:.5rem;color:var(--text-color)}
.primary-nav .menu a:hover{background:var(--bg-alt)}
.header-actions .search-form{display:flex;gap:.5rem;align-items:center}
.header-actions input[type=search]{border:1px solid var(--border);padding:.4rem .6rem;border-radius:.5rem}
.search-form .theme-toggle{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);background:var(--bg-alt);padding:.45rem;border-radius:.5rem;color:var(--text-color);cursor:pointer}
.search-form .theme-toggle:hover{border-color:var(--primary-color)}
.theme-toggle .icon{width:1rem;height:1rem;display:block}

/* Grid */
.post-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:1.5rem}
@media (max-width: 900px){.post-grid{grid-template-columns:repeat(2, 1fr)}}
@media (max-width: 640px){.post-grid{grid-template-columns:1fr}}

/* Cards */
.card{border:1px solid rgba(255,255,255,0.08);border-radius:1rem;overflow:hidden;background:linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));backdrop-filter:blur(8px);transition:transform .2s ease,box-shadow .25s ease}
.card:hover{transform:translateY(-2px) scale(1.01);box-shadow:0 0 0 1px rgba(255,255,255,0.08),0 0 24px rgba(59,130,246,0.15)}
.card-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-body{padding:1rem}
.card-meta{display:flex;gap:.6rem;color:var(--muted-color);font-size:.9rem;margin-bottom:.5rem}
.card-title{margin:.4rem 0;font-size:1.3rem;font-family:var(--heading-font)}
.card-excerpt{color:var(--muted-color)}
.btn{display:inline-block;padding:.6rem .9rem;border-radius:.6rem;border:0;cursor:pointer}
.btn-primary{background:var(--primary-color);color:#fff;box-shadow:0 0 0 rgba(0,0,0,0);transition:box-shadow .2s ease,transform .2s ease}
.btn-primary:hover{background:var(--accent-color);box-shadow:0 0 12px rgba(59,130,246,0.28);transform:translateY(-1px)}

/* Hero */
.hero{background:linear-gradient(120deg, rgba(59,130,246,.10), rgba(37,99,235,.08), var(--bg));background-size:200% 200%;animation:gradientShift 12s ease infinite;border-bottom:1px solid var(--border)}
.hero-inner{padding:2.5rem 0;text-align:center}
.hero-title{font-size:2.2rem;margin:0;font-family:var(--heading-font)}
.hero-subtitle{color:var(--muted-color);margin:.6rem 0 0}

@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

/* Featured */
.featured-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:1.5rem}
@media (max-width: 900px){.featured-grid{grid-template-columns:1fr}}
.featured-card{display:grid;border:1px solid rgba(255,255,255,0.08);border-radius:1rem;overflow:hidden;background:linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));backdrop-filter:blur(6px)}
.featured-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.featured-body{padding:1rem}
.featured-cats{color:var(--muted-color);font-size:.9rem}
.featured-title{margin:.4rem 0;font-size:1.4rem;font-family:var(--heading-font)}

/* Categories */
/* Acentos dinâmicos por categoria */
.category-ia{--accent-color:#22d3ee}
.category-programacao{--accent-color:#f59e0b}
.category-gadgets{--accent-color:#22c55e}

.tech-categories{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg-alt)}
.category-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:1rem}
@media (max-width: 900px){.category-grid{grid-template-columns:repeat(2, 1fr)}}
@media (max-width: 640px){.category-grid{grid-template-columns:1fr}}
.category-card{border:1px solid var(--border);border-radius:.8rem;padding:1rem;background:#fff;display:flex;justify-content:space-between;align-items:center}
.category-card:hover{border-color:var(--primary-color)}
.category-name{font-weight:600}
.category-count{color:var(--muted-color)}

/* Single */
.single-post{padding:1.5rem 0}
.single-header{margin-bottom:1rem}
.single-cats{color:var(--muted-color)}
.single-title{margin:.3rem 0;font-size:2rem}
.single-meta{color:var(--muted-color);display:flex;gap:.5rem}
.single-thumb img{width:100%;border-radius:1rem}
.single-content{margin-top:1rem}
.single-content p{margin:1rem 0}
.share-bar{display:flex;gap:.6rem;align-items:center;margin-top:1rem;border-top:1px solid var(--border);padding-top:1rem}
.share-link{border:1px solid var(--border);padding:.4rem .6rem;border-radius:.5rem}
.share-link:hover{border-color:var(--primary-color)}
.single-ads{margin:1.5rem 0;padding:1rem;border:1px dashed var(--border);border-radius:.8rem}

/* Sidebar */
.sidebar{margin-top:2rem}
.widget{border:1px solid var(--border);border-radius:.8rem;padding:1rem;background:#fff;margin-bottom:1rem}
.widget-title{margin:0 0 .6rem}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:var(--bg)}
.footer-inner{padding:1rem 0}
.footer-social{display:flex;gap:.6rem;margin-bottom:.6rem}
.footer-menu .menu{list-style:none;display:flex;gap:1rem;flex-wrap:wrap;padding:0;margin:0}
.footer-menu a{padding:.3rem .5rem;border-radius:.5rem}
.footer-menu a:hover{background:var(--bg-alt)}

/* Forms */
input, textarea{font:inherit}
input[type=text], input[type=search], input[type=url], textarea{border:1px solid var(--border);border-radius:.5rem;padding:.5rem}
.search-form{display:flex;gap:.5rem;align-items:center}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(12px) scale(.98);transition:opacity .4s ease,transform .4s ease}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{transition:none}}

/* Pagination */
.pagination{display:flex;justify-content:center;margin:1.2rem 0}
.pagination .page-numbers{border:1px solid var(--border);padding:.4rem .7rem;border-radius:.5rem;margin:.2rem}
.pagination .page-numbers.current{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}

/* Mobile nav */
@media (max-width: 900px){
  .nav-toggle{display:block}
  .primary-nav{display:none}
  .primary-nav.open{display:block}
  .primary-nav .menu{flex-direction:column}
}