/*
Theme Name: IABusiness Blog
Theme URI: https://iabusiness.es
Description: Tema personalizado para el blog de IA Business. Diseño oscuro/violeta con modo claro.
Author: IA Business
Author URI: https://iabusiness.es
Version: 1.0
License: GNU General Public License v2
Text Domain: iabusiness
*/

/* ===== RESET & VARIABLES ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  /* Dark mode (default) */
  --bg-primary:#0a0a0f;
  --bg-secondary:#111118;
  --bg-card:#16161f;
  --bg-card-hover:#1c1c28;
  --text-primary:#f0f0f5;
  --text-secondary:#a0a0b8;
  --text-muted:#6b6b82;
  --accent:#7c3aed;
  --accent-hover:#6d28d9;
  --accent-light:rgba(124,58,237,0.12);
  --accent-glow:rgba(124,58,237,0.25);
  --border:#1e1e2e;
  --border-hover:#2a2a3e;
  --nav-bg:rgba(10,10,15,0.85);
  --shadow:0 4px 24px rgba(0,0,0,0.3);
  --shadow-hover:0 8px 32px rgba(124,58,237,0.15);
  --tag-bg:rgba(124,58,237,0.15);
  --tag-text:#a78bfa;
  --code-bg:#1a1a2e;
  --blockquote-border:#7c3aed;
  --blockquote-bg:rgba(124,58,237,0.05);
  --input-bg:#16161f;
  --input-border:#2a2a3e;
}

[data-theme="light"]{
  --bg-primary:#f8f9fc;
  --bg-secondary:#ffffff;
  --bg-card:#ffffff;
  --bg-card-hover:#f3f0ff;
  --text-primary:#1a1a2e;
  --text-secondary:#4a4a68;
  --text-muted:#8888a0;
  --accent:#7c3aed;
  --accent-hover:#6d28d9;
  --accent-light:rgba(124,58,237,0.08);
  --accent-glow:rgba(124,58,237,0.12);
  --border:#e2e2ee;
  --border-hover:#d0d0e0;
  --nav-bg:rgba(248,249,252,0.9);
  --shadow:0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover:0 8px 32px rgba(124,58,237,0.1);
  --tag-bg:rgba(124,58,237,0.08);
  --tag-text:#6d28d9;
  --code-bg:#f0eef8;
  --blockquote-border:#7c3aed;
  --blockquote-bg:rgba(124,58,237,0.04);
  --input-bg:#ffffff;
  --input-border:#d0d0e0;
}

/* ===== BASE ===== */
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.7;
  font-size:16px;
  transition:background .3s,color .3s;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-hover)}
img{max-width:100%;height:auto;display:block}
::selection{background:var(--accent);color:#fff}

/* ===== NAVIGATION ===== */
.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:var(--nav-bg);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  transition:background .3s,border .3s;
}
.nav-inner{
  max-width:1200px;margin:0 auto;
  padding:0 2rem;height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{
  font-size:1.3rem;font-weight:800;
  color:var(--text-primary);display:flex;align-items:center;gap:.15rem;
}
.nav-logo .ia{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:1.5rem;list-style:none}
.nav-links a{
  color:var(--text-secondary);font-size:.9rem;font-weight:500;
  transition:color .2s;
}
.nav-links a:hover{color:var(--accent)}
.theme-toggle{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:8px;padding:6px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  width:36px;height:36px;transition:all .2s;
  color:var(--text-secondary);
}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}
.theme-toggle svg{width:18px;height:18px}
.btn-demo{
  background:var(--accent);color:#fff;
  padding:8px 18px;border-radius:8px;
  font-size:.85rem;font-weight:600;
  transition:all .2s;border:none;cursor:pointer;
}
.btn-demo:hover{background:var(--accent-hover);transform:translateY(-1px);color:#fff}

/* Mobile menu */
.menu-toggle{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;padding:4px}
.menu-toggle svg{width:24px;height:24px}

/* ===== HERO / BLOG HEADER ===== */
.blog-hero{
  padding:120px 2rem 60px;
  text-align:center;
  background:var(--bg-secondary);
  border-bottom:1px solid var(--border);
  position:relative;overflow:hidden;
}
.blog-hero::before{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:600px;height:600px;
  background:radial-gradient(circle,var(--accent-glow) 0%,transparent 70%);
  opacity:.3;pointer-events:none;
}
.blog-hero h1{
  font-size:clamp(2rem,5vw,3rem);font-weight:800;
  margin-bottom:.75rem;position:relative;
}
.blog-hero h1 .gradient-text{
  background:linear-gradient(135deg,var(--accent),#a78bfa,#c084fc);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.blog-hero p{
  color:var(--text-secondary);font-size:1.1rem;
  max-width:600px;margin:0 auto;position:relative;
}

/* ===== MAIN CONTENT LAYOUT ===== */
.site-content{
  max-width:1200px;margin:0 auto;
  padding:3rem 2rem;
  display:grid;
  grid-template-columns:1fr 320px;
  gap:3rem;
}

/* ===== POST CARDS (Blog listing) ===== */
.posts-grid{display:flex;flex-direction:column;gap:2rem}

.post-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:16px;
  overflow:hidden;
  transition:all .3s;
}
.post-card:hover{
  border-color:var(--accent);
  box-shadow:var(--shadow-hover);
  transform:translateY(-3px);
}
.post-card-image{
  width:100%;height:220px;
  object-fit:cover;
}
.post-card-image.no-thumb{
  background:linear-gradient(135deg,var(--accent-light),var(--bg-card-hover));
  display:flex;align-items:center;justify-content:center;
}
.post-card-image.no-thumb svg{width:48px;height:48px;color:var(--accent);opacity:.5}
.post-card-body{padding:1.5rem}
.post-card-meta{
  display:flex;align-items:center;gap:1rem;
  margin-bottom:.75rem;flex-wrap:wrap;
}
.post-card-date{
  font-size:.8rem;color:var(--text-muted);
  display:flex;align-items:center;gap:.35rem;
}
.post-card-date svg{width:14px;height:14px}
.post-card-cats{display:flex;gap:.5rem;flex-wrap:wrap}
.post-card-cat{
  background:var(--tag-bg);color:var(--tag-text);
  padding:3px 10px;border-radius:20px;
  font-size:.75rem;font-weight:600;
}
.post-card-title{
  font-size:1.25rem;font-weight:700;
  line-height:1.35;margin-bottom:.6rem;
}
.post-card-title a{color:var(--text-primary);transition:color .2s}
.post-card-title a:hover{color:var(--accent)}
.post-card-excerpt{
  color:var(--text-secondary);font-size:.92rem;
  line-height:1.65;margin-bottom:1rem;
}
.post-card-footer{
  display:flex;align-items:center;justify-content:space-between;
}
.read-more{
  display:inline-flex;align-items:center;gap:.4rem;
  color:var(--accent);font-size:.85rem;font-weight:600;
  transition:gap .2s;
}
.read-more:hover{gap:.7rem}
.read-more svg{width:16px;height:16px}
.post-card-author{
  display:flex;align-items:center;gap:.5rem;
  font-size:.82rem;color:var(--text-muted);
}
.post-card-author img{width:28px;height:28px;border-radius:50%}
.author-avatar-placeholder{
  width:28px;height:28px;border-radius:50%;
  background:var(--accent-light);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-size:.7rem;font-weight:700;
}

/* ===== SIDEBAR ===== */
.sidebar{display:flex;flex-direction:column;gap:2rem}
.sidebar-widget{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:16px;
  padding:1.5rem;
  transition:border-color .2s;
}
.sidebar-widget:hover{border-color:var(--border-hover)}
.widget-title{
  font-size:1rem;font-weight:700;
  margin-bottom:1rem;
  display:flex;align-items:center;gap:.5rem;
}
.widget-title svg{width:18px;height:18px;color:var(--accent)}

/* Search widget */
.search-form{display:flex;gap:.5rem}
.search-form input{
  flex:1;padding:10px 14px;
  background:var(--input-bg);border:1px solid var(--input-border);
  border-radius:10px;color:var(--text-primary);
  font-size:.9rem;font-family:inherit;
  transition:border-color .2s;
}
.search-form input:focus{outline:none;border-color:var(--accent)}
.search-form input::placeholder{color:var(--text-muted)}
.search-form button{
  background:var(--accent);color:#fff;
  border:none;border-radius:10px;
  padding:10px 14px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .2s;
}
.search-form button:hover{background:var(--accent-hover)}
.search-form button svg{width:18px;height:18px}

/* Categories widget */
.cat-list{list-style:none;display:flex;flex-direction:column;gap:.4rem}
.cat-list li a{
  display:flex;align-items:center;justify-content:space-between;
  padding:8px 12px;border-radius:10px;
  color:var(--text-secondary);font-size:.88rem;
  transition:all .2s;
}
.cat-list li a:hover{background:var(--accent-light);color:var(--accent)}
.cat-count{
  background:var(--accent-light);color:var(--tag-text);
  padding:2px 8px;border-radius:10px;
  font-size:.75rem;font-weight:600;
}

/* Recent posts widget */
.recent-posts{display:flex;flex-direction:column;gap:.8rem}
.recent-post{display:flex;gap:.75rem;align-items:start}
.recent-post-thumb{
  width:56px;height:56px;border-radius:10px;
  object-fit:cover;flex-shrink:0;
}
.recent-post-thumb-placeholder{
  width:56px;height:56px;border-radius:10px;
  background:var(--accent-light);flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
}
.recent-post-thumb-placeholder svg{width:20px;height:20px;color:var(--accent);opacity:.5}
.recent-post-info h4{
  font-size:.85rem;font-weight:600;
  line-height:1.35;margin-bottom:.2rem;
}
.recent-post-info h4 a{color:var(--text-primary);transition:color .2s}
.recent-post-info h4 a:hover{color:var(--accent)}
.recent-post-info span{font-size:.75rem;color:var(--text-muted)}

/* Tags widget */
.tag-cloud{display:flex;flex-wrap:wrap;gap:.5rem}
.tag-cloud a{
  background:var(--accent-light);color:var(--tag-text);
  padding:5px 12px;border-radius:20px;
  font-size:.78rem;font-weight:500;
  transition:all .2s;
}
.tag-cloud a:hover{background:var(--accent);color:#fff}

/* CTA widget */
.widget-cta{
  background:linear-gradient(135deg,var(--accent),#6d28d9);
  border:none;text-align:center;color:#fff;
}
.widget-cta .widget-title{color:#fff;justify-content:center}
.widget-cta .widget-title svg{color:#fff}
.widget-cta p{font-size:.9rem;opacity:.9;margin-bottom:1rem;color:rgba(255,255,255,.9)}
.widget-cta .btn-cta{
  display:inline-flex;align-items:center;gap:.4rem;
  background:#fff;color:var(--accent);
  padding:10px 20px;border-radius:10px;
  font-size:.85rem;font-weight:700;
  transition:transform .2s;
}
.widget-cta .btn-cta:hover{transform:translateY(-2px)}
.widget-cta .btn-cta svg{width:16px;height:16px}

/* ===== SINGLE POST ===== */
.single-content{max-width:100%}
.single-header{margin-bottom:2rem}
.single-meta{
  display:flex;align-items:center;gap:1rem;
  margin-bottom:1rem;flex-wrap:wrap;
}
.single-cats{display:flex;gap:.5rem;flex-wrap:wrap}
.single-cat{
  background:var(--tag-bg);color:var(--tag-text);
  padding:4px 12px;border-radius:20px;
  font-size:.8rem;font-weight:600;
}
.single-date{
  font-size:.85rem;color:var(--text-muted);
  display:flex;align-items:center;gap:.35rem;
}
.single-date svg{width:15px;height:15px}
.single-title{
  font-size:clamp(1.8rem,4vw,2.5rem);
  font-weight:800;line-height:1.25;margin-bottom:1rem;
}
.single-featured-img{
  width:100%;border-radius:16px;
  margin-bottom:2rem;
  border:1px solid var(--border);
}

/* Post content typography */
.post-content{font-size:1.05rem;line-height:1.8}
.post-content h2{
  font-size:1.6rem;font-weight:700;
  margin:2.5rem 0 1rem;
}
.post-content h3{
  font-size:1.3rem;font-weight:700;
  margin:2rem 0 .75rem;
}
.post-content h4{
  font-size:1.1rem;font-weight:600;
  margin:1.5rem 0 .5rem;
}
.post-content p{margin-bottom:1.25rem;color:var(--text-primary)}
.post-content ul,.post-content ol{
  margin:0 0 1.25rem 1.5rem;
  color:var(--text-primary);
}
.post-content li{margin-bottom:.4rem}
.post-content blockquote{
  border-left:4px solid var(--blockquote-border);
  background:var(--blockquote-bg);
  padding:1.25rem 1.5rem;
  margin:1.5rem 0;
  border-radius:0 12px 12px 0;
  font-style:italic;
  color:var(--text-secondary);
}
.post-content code{
  background:var(--code-bg);
  padding:2px 8px;border-radius:6px;
  font-size:.9em;
}
.post-content pre{
  background:var(--code-bg);
  padding:1.25rem;border-radius:12px;
  overflow-x:auto;margin:1.5rem 0;
  border:1px solid var(--border);
}
.post-content pre code{background:none;padding:0}
.post-content img{
  border-radius:12px;margin:1.5rem 0;
  border:1px solid var(--border);
}
.post-content a{
  color:var(--accent);
  text-decoration:underline;
  text-underline-offset:3px;
}
.post-content a:hover{text-decoration-color:var(--accent-hover)}
.post-content table{
  width:100%;border-collapse:collapse;
  margin:1.5rem 0;
}
.post-content th,.post-content td{
  padding:.75rem 1rem;
  border:1px solid var(--border);
  text-align:left;
}
.post-content th{
  background:var(--bg-secondary);
  font-weight:600;
}

/* Post tags */
.post-tags{
  margin-top:2.5rem;padding-top:1.5rem;
  border-top:1px solid var(--border);
  display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;
}
.post-tags-label{
  font-size:.85rem;font-weight:600;
  color:var(--text-muted);
  display:flex;align-items:center;gap:.35rem;
}
.post-tags-label svg{width:15px;height:15px}

/* Post navigation */
.post-nav{
  margin-top:2.5rem;padding-top:1.5rem;
  border-top:1px solid var(--border);
  display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;
}
.post-nav-item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:12px;padding:1.25rem;
  transition:all .2s;
}
.post-nav-item:hover{border-color:var(--accent);transform:translateY(-2px)}
.post-nav-item.next{text-align:right}
.post-nav-label{
  font-size:.75rem;font-weight:600;
  color:var(--text-muted);text-transform:uppercase;
  letter-spacing:.05em;margin-bottom:.35rem;
  display:flex;align-items:center;gap:.3rem;
}
.post-nav-item.next .post-nav-label{justify-content:flex-end}
.post-nav-label svg{width:14px;height:14px}
.post-nav-title{font-size:.92rem;font-weight:600;color:var(--text-primary)}
.post-nav-title a{color:var(--text-primary);transition:color .2s}
.post-nav-title a:hover{color:var(--accent)}

/* ===== PAGINATION ===== */
.pagination{
  margin-top:2.5rem;
  display:flex;align-items:center;justify-content:center;gap:.5rem;
}
.pagination a,.pagination span{
  padding:8px 14px;border-radius:10px;
  font-size:.88rem;font-weight:500;
  transition:all .2s;
}
.pagination a{
  background:var(--bg-card);color:var(--text-secondary);
  border:1px solid var(--border);
}
.pagination a:hover{border-color:var(--accent);color:var(--accent)}
.pagination .current{
  background:var(--accent);color:#fff;
  border:1px solid var(--accent);
}

/* ===== FOOTER ===== */
.site-footer{
  border-top:1px solid var(--border);
  padding:2.5rem 2rem;
  text-align:center;
  background:var(--bg-secondary);
}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-logo{
  font-size:1.2rem;font-weight:800;
  margin-bottom:.5rem;
}
.footer-logo .ia{color:var(--accent)}
.footer-sub{font-size:.82rem;color:var(--text-muted);margin-bottom:1rem}
.footer-links{
  display:flex;justify-content:center;gap:1.5rem;
  margin-bottom:1rem;flex-wrap:wrap;
}
.footer-links a{color:var(--text-muted);font-size:.82rem;transition:color .2s}
.footer-links a:hover{color:var(--accent)}
.footer-copy{font-size:.78rem;color:var(--text-muted)}

/* ===== 404 PAGE ===== */
.page-404{
  text-align:center;padding:120px 2rem 80px;
  min-height:60vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
}
.page-404 h1{font-size:5rem;font-weight:800;color:var(--accent);margin-bottom:.5rem}
.page-404 p{color:var(--text-secondary);font-size:1.1rem;margin-bottom:2rem}
.page-404 .btn-demo{padding:12px 24px;font-size:.95rem}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .site-content{grid-template-columns:1fr;gap:2rem}
  .sidebar{order:2}
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .nav-links.open{
    display:flex;flex-direction:column;
    position:absolute;top:64px;left:0;right:0;
    background:var(--nav-bg);
    backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);
    padding:1rem 2rem;gap:1rem;
  }
  .post-nav{grid-template-columns:1fr}
}
@media(max-width:600px){
  .nav-inner{padding:0 1rem}
  .blog-hero{padding:100px 1rem 40px}
  .site-content{padding:2rem 1rem}
  .post-card-image{height:180px}
  .single-title{font-size:1.6rem}
}

/* ===== PRINT ===== */
@media print{
  .site-nav,.sidebar,.site-footer,.post-nav,.pagination{display:none}
  .site-content{grid-template-columns:1fr;max-width:100%}
  body{background:#fff;color:#000}
}