:root{
  --bg:#f4f6fb; --card:#fff; --text:#1f2937; --muted:#6b7280;
  --primary:#2563eb; --primary-dark:#1d4ed8; --border:#e5e7eb;
  --danger:#dc2626; --ok:#059669; --radius:12px;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 4px 12px rgba(0,0,0,.04);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:'Segoe UI',system-ui,-apple-system,sans-serif;
  background:var(--bg); color:var(--text); line-height:1.65;
  display:flex; flex-direction:column; min-height:100vh;
}
img{max-width:100%}
a{color:var(--primary)}

/* Layout full-width */
.container{width:100%;padding:0 2.5rem}
@media(max-width:900px){.container{padding:0 1.25rem}}
@media(max-width:520px){.container{padding:0 1rem}}

.main-content{flex:1;padding-top:2rem;padding-bottom:3rem}

/* Header */
.site-header{
  background:#fff;border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:50;box-shadow:0 1px 3px rgba(0,0,0,.04)
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem;flex-wrap:wrap}
.brand{font-size:1.2rem;font-weight:700;color:var(--text);text-decoration:none;white-space:nowrap}
.site-nav{display:flex;gap:.4rem;align-items:center;flex-wrap:wrap}

/* Botones */
.btn{
  display:inline-flex;align-items:center;gap:.4rem;padding:.55rem 1rem;
  border-radius:8px;border:1px solid transparent;font-size:.9rem;font-weight:600;
  cursor:pointer;text-decoration:none;transition:.15s;font-family:inherit;
  background:#fff;color:var(--text);
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:transparent;border-color:var(--border)}
.btn-ghost:hover{background:#f3f4f6}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#b91c1c}
.btn-sm{padding:.35rem .7rem;font-size:.8rem}
.btn-block{width:100%;justify-content:center}

/* Formularios */
label,.fld{display:block;margin-bottom:.9rem;font-size:.9rem;font-weight:600}
input[type=text],input[type=email],input[type=password],input[type=file],textarea,select{
  width:100%;padding:.65rem .8rem;border:1px solid var(--border);border-radius:8px;
  font-family:inherit;font-size:.95rem;font-weight:400;background:#fff;color:var(--text);
  margin-top:.35rem;
}
input:focus,textarea:focus,select:focus{outline:2px solid #bfdbfe;border-color:var(--primary)}
textarea{resize:vertical;min-height:100px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media(max-width:520px){.form-row{grid-template-columns:1fr}}
.form-actions{display:flex;gap:.6rem;margin-top:1rem;flex-wrap:wrap}

/* Hero */
.hero{
  background:linear-gradient(135deg,#2563eb,#7c3aed);color:#fff;
  border-radius:var(--radius);padding:2.5rem 2rem;margin-bottom:2rem;text-align:center;
}
.hero h1{font-size:clamp(1.6rem,3vw,2.4rem);margin-bottom:.5rem}
.hero p{opacity:.9;font-size:1.05rem}

/* Grid de posts */
.posts-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:1.25rem;width:100%
}
.post-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.4rem;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:.6rem;
  transition:transform .15s,box-shadow .15s
}
.post-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.post-card h2{font-size:1.15rem;line-height:1.35}
.post-card h2 a{color:var(--text);text-decoration:none}
.post-card h2 a:hover{color:var(--primary)}
.post-meta{font-size:.82rem;color:var(--muted)}
.post-excerpt{color:#4b5563;font-size:.95rem;flex:1}
.empty{text-align:center;color:var(--muted);padding:3rem 0}

/* Post completo */
.post-full{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:2rem 2.5rem;box-shadow:var(--shadow);margin-bottom:2rem;
}
@media(max-width:520px){.post-full{padding:1.25rem}}
.post-full h1{font-size:clamp(1.5rem,3vw,2.2rem);margin-bottom:.5rem;line-height:1.25}
.post-content{margin-top:1.5rem;font-size:1.02rem}
.post-content h2{margin:1.5rem 0 .6rem;font-size:1.4rem}
.post-content h3{margin:1.2rem 0 .5rem;font-size:1.15rem}
.post-content p{margin-bottom:1rem}
.post-content ul,.post-content ol{margin:1rem 0 1rem 1.5rem}
.post-content blockquote{border-left:4px solid var(--primary);padding:.5rem 1rem;background:#eff6ff;border-radius:6px;margin:1rem 0;color:#1e40af}
.post-content pre{background:#1f2937;color:#f3f4f6;padding:1rem;border-radius:8px;overflow:auto;margin:1rem 0;font-family:Consolas,Monaco,monospace}
.post-content img{border-radius:8px;margin:1rem 0;display:block}
.pdf-link{display:inline-flex;align-items:center;gap:.4rem;background:#fee2e2;color:#991b1b;padding:.5rem .9rem;border-radius:8px;text-decoration:none;font-weight:600}
.video-embed{position:relative;padding-bottom:56.25%;height:0;margin:1.25rem 0;border-radius:10px;overflow:hidden;background:#000}
.video-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* Comentarios */
.comments-section{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:2rem 2.5rem;box-shadow:var(--shadow)}
@media(max-width:520px){.comments-section{padding:1.25rem}}
.comments-section h2{margin-bottom:1.25rem}
.comment-form{background:#f9fafb;border:1px solid var(--border);border-radius:10px;padding:1rem;margin-bottom:1.25rem}
.comments-list{margin-top:1.25rem}
.comments-children{margin-left:2rem;padding-left:1rem;border-left:2px solid var(--border);margin-top:.75rem}
@media(max-width:520px){.comments-children{margin-left:.8rem;padding-left:.8rem}}
.comment{padding:.9rem 0;border-bottom:1px dashed var(--border)}
.comment:last-child{border-bottom:none}
.comment-head{display:flex;justify-content:space-between;align-items:center;gap:1rem;font-size:.9rem}
.comment-body{margin:.4rem 0 .5rem;color:#374151;font-size:.95rem}
.reply-btn{background:none;border:none;color:var(--primary);font-weight:600;cursor:pointer;font-size:.85rem;padding:.2rem 0}
.reply-btn:hover{text-decoration:underline}
.reply-slot{margin-top:.75rem}
.reply-form{margin-bottom:0}

/* Login */
.auth-wrap{display:flex;justify-content:center;align-items:flex-start;padding-top:3rem}
.auth-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow);width:100%;max-width:400px}
.auth-card h1{margin-bottom:1.25rem;text-align:center}

/* Admin */
.admin-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.25rem;gap:1rem;flex-wrap:wrap}
.table-wrap{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:auto;box-shadow:var(--shadow)}
.admin-table{width:100%;border-collapse:collapse;min-width:600px}
.admin-table th,.admin-table td{padding:.85rem 1rem;text-align:left;border-bottom:1px solid var(--border);font-size:.92rem;vertical-align:middle}
.admin-table th{background:#f9fafb;font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
.admin-table tr:hover td{background:#fafbff}
.admin-table .actions{display:flex;gap:.4rem;flex-wrap:wrap}

/* Editor */
.post-form{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow)}
.editor-wrap{border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#fff;margin-bottom:1rem}
.editor-toolbar{display:flex;flex-wrap:wrap;gap:.25rem;padding:.5rem;background:#f9fafb;border-bottom:1px solid var(--border)}
.editor-toolbar button{
  background:#fff;border:1px solid var(--border);border-radius:6px;
  padding:.35rem .6rem;font-size:.85rem;cursor:pointer;font-family:inherit;
  min-width:34px;color:var(--text)
}
.editor-toolbar button:hover{background:#eff6ff;border-color:var(--primary);color:var(--primary)}
.tb-sep{width:1px;background:var(--border);margin:.15rem .25rem}
.editor-area{
  min-height:380px;padding:1.25rem;font-size:1rem;line-height:1.7;outline:none;overflow-y:auto;
}
.editor-area:empty:before{content:attr(data-ph);color:#9ca3af}
.editor-area h2{font-size:1.4rem;margin:1rem 0 .5rem}
.editor-area h3{font-size:1.15rem;margin:.9rem 0 .4rem}
.editor-area p{margin-bottom:.8rem}
.editor-area blockquote{border-left:4px solid var(--primary);padding:.5rem 1rem;background:#eff6ff;border-radius:6px;margin:.8rem 0}
.editor-area pre{background:#1f2937;color:#f3f4f6;padding:.9rem;border-radius:8px;overflow:auto;font-family:Consolas,monospace}

/* Files */
.upload-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1.5rem;box-shadow:var(--shadow);display:flex;gap:1rem;align-items:center;flex-wrap:wrap}
.upload-box .hint{color:var(--muted);font-size:.82rem;width:100%;margin:0}
.files-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}
.file-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.file-thumb{height:140px;background:#f3f4f6;display:flex;align-items:center;justify-content:center;overflow:hidden}
.file-thumb img{width:100%;height:100%;object-fit:cover}
.file-icon{font-size:3rem}
.file-info{padding:.75rem 1rem;flex:1}
.file-name{font-weight:600;font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-meta{color:var(--muted);font-size:.8rem;margin-top:.2rem}
.file-actions{padding:.6rem 1rem;border-top:1px solid var(--border);display:flex;gap:.35rem;flex-wrap:wrap}

/* Modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(2px);
  display:none;align-items:center;justify-content:center;z-index:100;padding:1rem
}
.modal-overlay.active{display:flex}
.modal{background:#fff;border-radius:var(--radius);width:100%;max-width:440px;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:pop .18s ease}
@keyframes pop{from{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;border-bottom:1px solid var(--border)}
.modal-head h3{font-size:1.05rem}
.modal-close{background:none;border:none;font-size:1.6rem;cursor:pointer;color:var(--muted);line-height:1}
.modal-close:hover{color:var(--text)}
.modal-body{padding:1.25rem}
.modal-msg{margin-top:.5rem;font-size:.88rem;min-height:1.1em}
.modal-msg.ok{color:var(--ok)}
.modal-msg.err{color:var(--danger)}

/* Alertas */
.alert-error,.alert-info{padding:.7rem 1rem;border-radius:8px;margin-bottom:1rem;font-size:.9rem}
.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}
.alert-info{background:#dbeafe;color:#1e40af;border:1px solid #bfdbfe}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:#fff;padding:1.25rem 0;color:var(--muted);font-size:.85rem;text-align:center;margin-top:auto}