*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#4F46E5;--primary-hover:#4338CA;--primary-light:#EEF2FF;
  --sidebar-bg:#1E1B4B;--sidebar-text:#C7D2FE;--sidebar-active:#4F46E5;
  --bg:#F1F5F9;--surface:#FFFFFF;--border:#E2E8F0;
  --text:#1E293B;--text-secondary:#64748B;--text-light:#94A3B8;
  --success:#10B981;--warning:#F59E0B;--danger:#EF4444;--info:#3B82F6;
  --radius:8px;--shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
  --shadow-lg:0 10px 15px rgba(0,0,0,.1),0 4px 6px rgba(0,0,0,.05);
}
html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;color:var(--text);background:var(--bg)}
a{color:var(--primary);text-decoration:none}
button{cursor:pointer;font-family:inherit}
input,select,textarea{font-family:inherit;font-size:.875rem}

/* Login */
#login-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#1E1B4B 0%,#4F46E5 100%)}
.login-box{background:#fff;padding:3rem;border-radius:16px;width:100%;max-width:400px;text-align:center;box-shadow:var(--shadow-lg)}
.login-logo{color:var(--primary);margin-bottom:1rem}
.login-box h1{font-size:1.5rem;margin-bottom:.25rem}
.login-subtitle{color:var(--text-secondary);font-size:.875rem;margin-bottom:1.5rem}
#login-form input{width:100%;padding:.75rem 1rem;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:1rem;font-size:1rem;outline:none;transition:border .2s}
#login-form input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.15)}
.error-text{color:var(--danger);font-size:.8rem;margin-top:.5rem}

/* Layout */
#main-app{display:flex;height:100vh;overflow:hidden}
#sidebar{width:240px;min-width:240px;background:var(--sidebar-bg);display:flex;flex-direction:column;color:var(--sidebar-text)}
.sidebar-header{display:flex;align-items:center;gap:.75rem;padding:1.25rem 1.25rem;font-weight:700;font-size:1.1rem;color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
#sidebar-nav{flex:1;padding:.75rem .5rem;display:flex;flex-direction:column;gap:2px}
.nav-item{display:flex;align-items:center;gap:.75rem;padding:.65rem 1rem;border-radius:var(--radius);font-size:.875rem;color:var(--sidebar-text);transition:all .15s;border:none;background:none;width:100%;text-align:left}
.nav-item:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-item.active{background:var(--sidebar-active);color:#fff}
.sidebar-footer{padding:.75rem .5rem;border-top:1px solid rgba(255,255,255,.08)}
.logout-btn{color:#F87171!important}
.logout-btn:hover{background:rgba(239,68,68,.15)!important}

/* Content */
#content{flex:1;overflow-y:auto;padding:2rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:var(--radius);font-size:.875rem;font-weight:500;border:1px solid transparent;transition:all .15s}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-hover)}
.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--border)}
.btn-secondary:hover{background:var(--bg)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#DC2626}
.btn-success{background:var(--success);color:#fff}
.btn-success:hover{background:#059669}
.btn-warning{background:var(--warning);color:#fff}
.btn-warning:hover{background:#D97706}
.btn-sm{padding:.35rem .75rem;font-size:.8rem}
.btn-full{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* Cards */
.card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow)}
.card-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--border)}
.card-header h2{font-size:1.1rem;font-weight:600}
.card-body{padding:1.25rem}

/* Page header */
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}
.page-header h1{font-size:1.5rem;font-weight:700}
.page-header .actions{display:flex;gap:.5rem}

/* Stats */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}
.stat-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);padding:1.25rem;box-shadow:var(--shadow)}
.stat-card .stat-value{font-size:2rem;font-weight:700;color:var(--primary)}
.stat-card .stat-label{font-size:.8rem;color:var(--text-secondary);margin-top:.25rem;text-transform:uppercase;letter-spacing:.05em}

/* Table */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--border);font-size:.875rem}
th{font-weight:600;color:var(--text-secondary);font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;background:var(--bg)}
tr:hover td{background:var(--primary-light)}
td .actions-cell{display:flex;gap:.35rem}

/* Badge */
.badge{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.badge-success{background:#D1FAE5;color:#065F46}
.badge-warning{background:#FEF3C7;color:#92400E}
.badge-danger{background:#FEE2E2;color:#991B1B}
.badge-info{background:#DBEAFE;color:#1E40AF}
.badge-secondary{background:#F1F5F9;color:#475569}

/* Forms */
.form-group{margin-bottom:1rem}
.form-group label{display:block;font-size:.8rem;font-weight:600;color:var(--text-secondary);margin-bottom:.35rem;text-transform:uppercase;letter-spacing:.03em}
.form-control{width:100%;padding:.6rem .85rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.875rem;outline:none;transition:border .2s,box-shadow .2s}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
textarea.form-control{resize:vertical;min-height:80px}
select.form-control{appearance:auto}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-hint{font-size:.75rem;color:var(--text-light);margin-top:.25rem}
.checkbox-group{display:flex;flex-wrap:wrap;gap:.5rem}
.checkbox-item{display:flex;align-items:center;gap:.35rem;padding:.35rem .65rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.8rem;cursor:pointer;transition:all .15s}
.checkbox-item:hover{border-color:var(--primary)}
.checkbox-item.selected{background:var(--primary-light);border-color:var(--primary);color:var(--primary)}
.checkbox-item input{display:none}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;backdrop-filter:blur(2px)}
.modal{background:var(--surface);border-radius:12px;width:100%;max-width:560px;max-height:90vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;border-bottom:1px solid var(--border)}
.modal-header h3{font-size:1.1rem;font-weight:600}
.modal-close{background:none;border:none;font-size:1.5rem;color:var(--text-secondary);padding:0 .25rem;line-height:1}
.modal-close:hover{color:var(--text)}
.modal-body{padding:1.5rem;overflow-y:auto}
.modal-actions{display:flex;gap:.5rem;justify-content:flex-end;margin-top:1.25rem}
.modal-lg{max-width:800px}

/* Email editor */
.editor-layout{display:flex;gap:0;height:calc(100vh - 180px);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.editor-code{flex:1;display:flex;flex-direction:column;min-width:0}
.editor-preview{flex:1;border-left:1px solid var(--border);background:#fff;display:flex;flex-direction:column;min-width:0}
.editor-toolbar{display:flex;align-items:center;gap:.5rem;padding:.5rem .75rem;background:var(--bg);border-bottom:1px solid var(--border);flex-wrap:wrap}
.editor-toolbar .toolbar-group{display:flex;gap:.35rem;align-items:center}
.editor-toolbar .separator{width:1px;height:20px;background:var(--border);margin:0 .25rem}
/* Certificate editor layout */
.cert-editor-layout{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;align-items:start}
.cert-editor-layout .cert-dates-panel{grid-column:1/-1}
.cert-preview-col{min-width:0}
.cert-pages-tabs{margin-bottom:.75rem}
.cert-pages-tabs-inner{display:flex;flex-wrap:wrap;gap:.35rem;align-items:center}
.cert-page-tab{padding:.4rem .75rem;font-size:.8rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text-secondary);cursor:pointer;transition:all .15s}
.cert-page-tab:hover{background:var(--bg);color:var(--text)}
.cert-page-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.cert-page-tab.cert-page-add{background:var(--primary-light);color:var(--primary);border-style:dashed}
.cert-page-tab.cert-page-add:hover{background:var(--primary);color:#fff}
.cert-blocks-actions{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}
.cert-preview-box{position:relative;width:100%;max-width:100%;background:#f0f0f0;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.cert-preview-box .cert-preview-bg{width:100%;height:100%;object-fit:contain;display:block}
.cert-preview-texts{position:absolute;inset:0;pointer-events:none}
.cert-form-row-3{grid-template-columns:1fr 1fr 1fr}
.cert-create-section{margin-bottom:1.5rem;padding-bottom:1.5rem;border-bottom:1px solid var(--border)}
.cert-create-section:last-of-type{border-bottom:none;margin-bottom:0;padding-bottom:0}
.cert-section-title{font-size:.9rem;font-weight:600;color:var(--text);margin-bottom:1rem}
.cert-dates-wrap{max-height:280px;overflow-y:auto}
.cert-preview-col{min-width:0}
.cert-edit-panels{display:grid;grid-template-columns:1fr 1fr;gap:1rem;min-width:0}
.cert-panel{border:2px solid var(--border);border-radius:var(--radius);padding:1rem;background:var(--surface)}
.cert-panel-title{font-size:.85rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border)}
.cert-edit-blocks-wrap{max-height:340px;overflow-y:auto;padding-right:.25rem;margin-bottom:.5rem}
/* Text block cards - borde más grueso */
.cert-block-card{border:1px solid var(--border);border-radius:var(--radius);padding:1rem;margin-bottom:.75rem;background:var(--surface);transition:border-color .15s}
.cert-block-card:hover{border-color:var(--primary)}
.cert-block-card:last-child{margin-bottom:0}
.cert-block-header{display:flex;align-items:center;gap:.5rem;margin-bottom:.6rem}
.cert-edit-blocks-wrap{max-height:400px;overflow-y:auto;padding-right:.25rem}
.cert-block-header select{flex:1;min-width:0}
.cert-block-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;background:var(--primary);color:#fff;border-radius:50%;font-size:.75rem;font-weight:600;flex-shrink:0}
.cert-block-content-row{display:flex;align-items:center;gap:.5rem;margin-bottom:.6rem}
.cert-block-content-row label{font-size:.75rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.03em;flex-shrink:0}
.cert-block-content-row input{flex:1;min-width:0}
.cert-block-header .btn{margin-left:auto;flex-shrink:0}
.cert-block-row{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;margin-bottom:.5rem}
.cert-block-row:last-child{margin-bottom:0}
.cert-block-row label{font-size:.75rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.03em;min-width:fit-content}
.cert-block-pos input{width:70px}
.cert-block-style .form-control{min-width:0}
.cert-block-style .cert-block-bold{display:inline-flex;align-items:center;gap:.35rem;font-size:.8rem;font-weight:500;text-transform:none;letter-spacing:0;cursor:pointer}
.cert-block-style .cert-block-bold input{cursor:pointer}
.cert-color-input{width:42px;height:32px;padding:2px;cursor:pointer;border-radius:var(--radius)}
.cert-canvas-size .form-row{display:flex;align-items:center;gap:.5rem;grid-template-columns:none!important}
.cert-canvas-sep{color:var(--text-secondary);font-weight:600}
.cert-row-sent{background:linear-gradient(90deg,rgba(16,185,129,.06) 0%,transparent 100%)}
.cert-row-sent td:first-child{position:relative}
.cert-row-sent .badge{margin-left:.5rem}
.editor-preview-frame{flex:1;border:none;width:100%;background:#fff}
.editor-preview-label{padding:.5rem .75rem;background:var(--bg);border-bottom:1px solid var(--border);font-size:.75rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}
.CodeMirror{height:100%!important;font-size:.85rem}

/* Toast */
#toast-container{position:fixed;top:1rem;right:1rem;z-index:2000;display:flex;flex-direction:column;gap:.5rem}
.toast{padding:.75rem 1.25rem;border-radius:var(--radius);color:#fff;font-size:.875rem;box-shadow:var(--shadow-lg);animation:slideIn .3s ease;max-width:400px}
.toast-success{background:var(--success)}
.toast-error{background:var(--danger)}
.toast-info{background:var(--info)}
.toast-warning{background:var(--warning);color:#111827}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* Horarios de envío (reglas múltiples) */
.schedule-rule-card{border:1px solid var(--border);border-radius:var(--radius);padding:1rem 1.1rem;margin-bottom:1rem;background:var(--bg)}
.schedule-rule-card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:.5rem;gap:.5rem}
.schedule-rule-title{font-weight:600;font-size:.9rem;color:var(--text)}
.schedule-segment{display:flex;flex-wrap:wrap;gap:.35rem;margin:.75rem 0}
.schedule-seg-btn{flex:1;min-width:140px;padding:.55rem .75rem;border:2px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);font-size:.82rem;font-weight:500;transition:border-color .15s,background .15s,box-shadow .15s}
.schedule-seg-btn:hover{border-color:var(--primary-light);background:var(--primary-light)}
.schedule-seg-btn.is-active{border-color:var(--primary);background:var(--primary);color:#fff;box-shadow:0 0 0 1px rgba(79,70,229,.25)}
.schedule-seg-btn:focus{outline:none;box-shadow:0 0 0 3px rgba(79,70,229,.2)}
.schedule-rule-card .checkbox-group{margin-top:.5rem}
#schedule-conflict-preview{margin-top:.75rem;padding:.75rem;border-radius:var(--radius);font-size:.8rem;display:none}
#schedule-conflict-preview.has-errors{border:1px solid var(--danger);background:rgba(239,68,68,.08);color:var(--danger)}
#schedule-conflict-preview.has-warnings{border:1px solid var(--warning);background:rgba(245,158,11,.12);color:#92400e}
#schedule-rules-list{margin-bottom:1rem}

/* Search / Filter bar */
.filter-bar{display:flex;gap:.75rem;align-items:center;margin-bottom:1rem;flex-wrap:wrap}
.filter-bar .form-control{max-width:300px}
.filter-bar select.form-control{max-width:200px}

/* Pagination */
.pagination{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0;font-size:.85rem;color:var(--text-secondary)}
.pagination-buttons{display:flex;gap:.35rem}

/* Empty state */
.empty-state{text-align:center;padding:3rem;color:var(--text-secondary)}
.empty-state svg{margin-bottom:1rem;opacity:.4}
.empty-state p{margin-bottom:1rem}

/* Progress bar */
.progress-bar{height:8px;background:var(--border);border-radius:4px;overflow:hidden}
.progress-fill{height:100%;border-radius:4px;transition:width .3s}
.progress-fill.success{background:var(--success)}
.progress-fill.danger{background:var(--danger)}
.progress-fill.primary{background:var(--primary)}

/* Responsive */
@media(max-width:1200px){
  .cert-editor-layout{grid-template-columns:1fr}
  .cert-edit-panels{grid-template-columns:1fr}
}
@media(max-width:1100px){
  .cert-editor-layout{grid-template-columns:1fr}
  .cert-edit-panels{grid-template-columns:1fr}
}
@media(max-width:768px){
  .stats-charts-row{grid-template-columns:1fr!important}
  #sidebar{width:56px;min-width:56px}
  .sidebar-header span,.nav-item span,.nav-item:not(svg){font-size:0;overflow:hidden}
  .nav-item{justify-content:center;padding:.65rem}
  .nav-item svg{margin:0}
  #content{padding:1rem}
  .form-row,.cert-form-row-3{grid-template-columns:1fr}
  .editor-layout{flex-direction:column;height:auto}
  .cert-edit-panels{min-width:auto}
}

/* Utility */
.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}
.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}
.text-sm{font-size:.8rem}.text-muted{color:var(--text-secondary)}
.flex{display:flex}.flex-between{display:flex;justify-content:space-between;align-items:center}
.gap-1{gap:.5rem}.gap-2{gap:1rem}
.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:250px}