/* ══════════════════════════════════════════
   NEXEL ACADEMY — CSS v1.0.0
   ══════════════════════════════════════════ */

:root {
  --na-azul:     #0A1E3C;
  --na-azul-med: #1A3460;
  --na-verde:    #1CC885;
  --na-verde-dk: #17a872;
  --na-fondo:    #F5F7FA;
  --na-blanco:   #ffffff;
  --na-texto:    #1a2332;
  --na-muted:    #64748b;
  --na-borde:    #e2e8f0;
  --na-rojo:     #ef4444;
}

/* ══ SALUDO BANNER ══ */
.nexel-saludo-banner { display:flex; align-items:center; gap:16px; margin-bottom:16px; }
.nsb-left { display:flex; flex-direction:column; gap:3px; }
.nsb-saludo { font-size:15px; color:rgba(255,255,255,.6); }
.nsb-saludo strong { color:#fff; font-weight:700; }
.nsb-estado { font-size:12px; color:rgba(255,255,255,.4); }

/* ══ COURSE TAGS ══ */
.nexel-course-tags { display:flex; gap:6px; flex-wrap:wrap; margin-bottom:16px; }
.nct-tag { font-size:10px; font-weight:700; padding:3px 10px; border-radius:4px; letter-spacing:.05em; text-transform:uppercase; }
.nct-nivel { background:rgba(28,200,133,.15); color:var(--na-verde); border:1px solid rgba(28,200,133,.3); }
.nct-tema { background:rgba(255,255,255,.07); color:rgba(255,255,255,.5); border:1px solid rgba(255,255,255,.1); }

/* ══ COURSE STATS ══ */
.nexel-course-stats { display:flex; gap:20px; flex-wrap:wrap; align-items:center; }
.ncs-item { display:flex; align-items:center; gap:6px; font-size:13px; color:rgba(255,255,255,.5); }
.ncs-icon { font-size:15px; }
.ncs-num { font-weight:700; color:rgba(255,255,255,.85); }
.ncs-label { color:rgba(255,255,255,.45); }
.ncs-label strong { color:rgba(255,255,255,.85); font-weight:700; }

/* ══ TEMARIO (SALES PAGE) ══ */
.nexel-temario { background:var(--na-azul); border-radius:10px; padding:20px; }
.nt-header { color:#fff; font-size:12px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; margin-bottom:14px; padding-bottom:12px; border-bottom:1px solid rgba(255,255,255,.08); }
.nt-leccion { display:flex; align-items:center; gap:12px; background:var(--na-azul-med); border:1px solid rgba(255,255,255,.06); border-radius:8px; padding:12px 16px; margin-bottom:6px; transition:background .18s; }
.nt-leccion:hover { background:#1e3d75; border-color:rgba(28,200,133,.3); }
.nt-leccion.expandible { cursor:pointer; }
.nt-num { background:var(--na-verde); color:var(--na-azul); width:26px; height:26px; border-radius:6px; display:flex; align-items:center; justify-content:center; font-size:11px; font-weight:800; flex-shrink:0; }
.nt-titulo { color:#fff; font-size:14px; font-weight:600; flex:1; }
.nt-meta { color:rgba(255,255,255,.35); font-size:12px; white-space:nowrap; }
.nt-arrow { color:rgba(255,255,255,.5); font-size:10px; transition:transform .25s ease; display:inline-block; margin-left:8px; flex-shrink:0; }
.nt-leccion.abierta .nt-arrow { color:var(--na-verde); }
.nt-temas { background:rgba(0,0,0,.2); border-radius:0 0 8px 8px; margin-top:-6px; margin-bottom:6px; padding:6px 0; border:1px solid rgba(255,255,255,.04); border-top:none; }
.nt-tema { display:flex; align-items:center; gap:10px; padding:8px 16px; border-bottom:1px solid rgba(255,255,255,.04); }
.nt-tema:last-child { border-bottom:none; }
.nt-tema-dot { width:6px; height:6px; border-radius:50%; background:rgba(28,200,133,.5); flex-shrink:0; }
.nt-tema-titulo { color:rgba(255,255,255,.6); font-size:12px; }

/* ══ CURRICULUM INSCRITO ══ */
.nexel-curriculum { display:flex; flex-direction:column; gap:8px; }
.nl-leccion { border:1px solid var(--na-borde); border-radius:10px; overflow:hidden; background:var(--na-blanco); transition:border-color .18s; }
.nl-leccion.nl-completada { border-color:rgba(28,200,133,.3); background:#f0faf6; }
.nl-leccion.nl-progreso { border-color:rgba(96,165,250,.4); }
.nl-leccion-header { display:flex; align-items:center; gap:12px; padding:13px 16px; }
.nl-leccion.nl-expandible .nl-leccion-header { cursor:pointer; }
.nl-leccion-header:hover { background:rgba(0,0,0,.02); }
.nl-num { background:var(--na-azul); color:#fff; width:26px; height:26px; border-radius:6px; display:flex; align-items:center; justify-content:center; font-size:11px; font-weight:700; flex-shrink:0; }
.nl-num.nl-num-ok { background:var(--na-verde); color:var(--na-azul); }
.nl-leccion-info { flex:1; min-width:0; }
.nl-titulo { font-size:14px; font-weight:600; color:var(--na-azul); text-decoration:none; display:block; }
.nl-titulo:hover { color:var(--na-verde); }
.nl-meta-temas { font-size:11px; color:var(--na-muted); margin-top:2px; display:block; }
.nl-leccion-right { display:flex; align-items:center; gap:8px; flex-shrink:0; }
.nl-badge { font-size:10px; font-weight:700; padding:3px 8px; border-radius:4px; text-transform:uppercase; letter-spacing:.04em; white-space:nowrap; }
.nl-badge-completada { background:#f0faf6; color:var(--na-verde-dk); }
.nl-badge-progreso { background:#eff6ff; color:#2563eb; }
.nl-badge-pendiente { background:var(--na-fondo); color:var(--na-muted); }
.nl-arrow { color:var(--na-muted); font-size:10px; transition:transform .25s; display:inline-block; }
.nl-temas { background:var(--na-fondo); border-top:1px solid var(--na-borde); padding:4px 0; }
.nl-tema { display:flex; align-items:center; gap:10px; padding:8px 16px; border-bottom:1px solid var(--na-borde); }
.nl-tema:last-child { border-bottom:none; }
.nl-tema:hover { background:rgba(28,200,133,.04); }
.nl-tema-dot { width:7px; height:7px; border-radius:50%; border:1.5px solid var(--na-borde); flex-shrink:0; }
.nl-tema-dot.nl-tema-dot-ok { background:var(--na-verde); border-color:var(--na-verde); }
.nl-tema-titulo { font-size:13px; color:var(--na-texto); text-decoration:none; flex:1; }
.nl-tema-titulo:hover { color:var(--na-verde); }
.nl-tema-check { font-size:11px; color:var(--na-verde); font-weight:700; margin-left:auto; }

/* ══ SIGUIENTE LECCIÓN ══ */
.nexel-siguiente-leccion { display:flex; align-items:center; justify-content:space-between; gap:14px; background:var(--na-blanco); border:1px solid var(--na-borde); border-left:4px solid var(--na-verde); border-radius:10px; padding:16px 20px; text-decoration:none; transition:all .18s; margin-bottom:24px; }
.nexel-siguiente-leccion:hover { border-color:var(--na-verde); box-shadow:0 4px 16px rgba(10,30,60,.07); }
.nexel-sl-completo { background:#f0faf6; border-color:rgba(28,200,133,.4); cursor:default; }
.nsl-label { font-size:11px; font-weight:700; color:var(--na-verde); text-transform:uppercase; letter-spacing:.07em; margin-bottom:4px; }
.nsl-titulo { font-size:15px; font-weight:700; color:var(--na-azul); }
.nsl-icon { font-size:24px; flex-shrink:0; color:var(--na-verde); }

/* ══ RETOS — META CHIPS ══ */
.reto-meta-chips { display:flex; gap:10px; flex-wrap:wrap; margin:8px 0 16px; }
.reto-meta-chip { background:var(--na-fondo); border:1px solid var(--na-borde); border-radius:8px; padding:7px 14px; font-size:13px; color:var(--na-muted); }
.reto-meta-chip strong { color:var(--na-azul); }

/* ══ RETOS — VERIFICACIÓN ══ */
.reto-verificacion { display:flex; flex-direction:column; gap:16px; margin:8px 0; }
.reto-pregunta { background:var(--na-fondo); border:1px solid var(--na-borde); border-radius:10px; padding:16px 18px; display:flex; flex-direction:column; gap:10px; transition:border-color .2s, background .2s; }
.reto-pregunta.correcta { border-color:rgba(28,200,133,.5); background:#f0faf6; }
.reto-pregunta.incorrecta { border-color:rgba(239,68,68,.4); background:#fef2f2; }
.reto-pregunta-label { display:flex; align-items:flex-start; gap:10px; }
.reto-pregunta-num { background:var(--na-azul); color:#fff; width:22px; height:22px; border-radius:5px; display:flex; align-items:center; justify-content:center; font-size:11px; font-weight:700; flex-shrink:0; margin-top:1px; }
.reto-pregunta-texto { font-size:14px; font-weight:600; color:var(--na-azul); line-height:1.4; }
.reto-pregunta-input-row { display:flex; gap:10px; align-items:center; }
.reto-input { flex:1; border:1.5px solid var(--na-borde) !important; border-radius:8px !important; padding:9px 12px !important; font-size:14px !important; color:var(--na-texto) !important; background:#fff !important; font-family:inherit !important; box-shadow:none !important; outline:none !important; }
.reto-input:focus { border-color:var(--na-verde) !important; }
.reto-input.correcta { border-color:var(--na-verde) !important; background:#f0faf6 !important; }
.reto-input.incorrecta { border-color:var(--na-rojo) !important; background:#fef2f2 !important; }
.reto-btn-verificar { background:var(--na-azul) !important; color:#fff !important; border:none !important; border-radius:8px !important; padding:9px 18px !important; font-size:13px !important; font-weight:600 !important; cursor:pointer !important; white-space:nowrap !important; font-family:inherit !important; box-shadow:none !important; }
.reto-btn-verificar:hover { background:var(--na-azul-med) !important; }
.reto-btn-verificar.correcto { background:var(--na-verde) !important; color:var(--na-azul) !important; }
.reto-btn-verificar.incorrecto { background:var(--na-rojo) !important; }
.reto-feedback { font-size:13px; font-weight:500; padding:8px 12px; border-radius:6px; display:flex; align-items:center; gap:7px; }
.reto-feedback.hidden { display:none; }
.reto-feedback.correcto { background:rgba(28,200,133,.1); color:var(--na-verde-dk); border:1px solid rgba(28,200,133,.3); }
.reto-feedback.incorrecto { background:rgba(239,68,68,.08); color:#dc2626; border:1px solid rgba(239,68,68,.25); }
.reto-resultado-global { background:var(--na-azul); color:#fff; border-radius:10px; padding:16px 20px; display:flex; align-items:center; gap:12px; font-size:15px; font-weight:600; margin-top:6px; }
.reto-resultado-global.hidden { display:none; }
.reto-resultado-global.perfecto { background:var(--na-verde); color:var(--na-azul); }
.reto-btn-descarga { display:inline-flex; align-items:center; gap:10px; background:rgba(28,200,133,.08); border:1px dashed rgba(28,200,133,.5); border-radius:10px; padding:14px 20px; color:var(--na-azul) !important; font-weight:600; font-size:14px; text-decoration:none !important; transition:background .2s; margin:8px 0 16px; }
.reto-btn-descarga:hover { background:rgba(28,200,133,.15); }

/* ══ RETOS GRID ══ */
.retos-grid-wrap { padding:0 0 48px; }
.rg-stats { display:flex; gap:32px; flex-wrap:wrap; padding:24px 0 20px; border-bottom:1px solid var(--na-borde); margin-bottom:20px; }
.rg-stat-num { font-size:28px; font-weight:800; color:var(--na-verde); line-height:1; }
.rg-stat-label { font-size:12px; color:var(--na-muted); margin-top:3px; }
.rg-filtros { display:flex; gap:8px; flex-wrap:wrap; align-items:center; margin-bottom:16px; }
.rg-filtro-label { font-size:11px; font-weight:700; color:var(--na-muted); text-transform:uppercase; letter-spacing:.06em; }
.rg-filtro-sep { width:1px; height:20px; background:var(--na-borde); margin:0 4px; }
.rg-chip { display:inline-flex; align-items:center; gap:5px; padding:6px 14px; border-radius:99px; font-size:13px; font-weight:500; cursor:pointer; border:1px solid var(--na-borde); background:#fff; color:var(--na-muted); transition:all .18s; font-family:inherit; }
.rg-chip:hover { border-color:var(--na-verde); color:var(--na-azul); }
.rg-chip.active { background:var(--na-azul); color:#fff; border-color:var(--na-azul); font-weight:600; }
.rg-chip-dot { width:7px; height:7px; border-radius:50%; display:inline-block; }
.rg-visible-count { font-size:13px; color:var(--na-muted); margin-bottom:20px; }
.rg-visible-count strong { color:var(--na-azul); }
.rg-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:18px; }
.rg-card { background:#fff; border:1px solid var(--na-borde); border-radius:12px; overflow:hidden; display:flex; flex-direction:column; transition:transform .22s, box-shadow .22s, border-color .22s; }
.rg-card:hover { transform:translateY(-3px); box-shadow:0 8px 32px rgba(10,30,60,.08); border-color:rgba(28,200,133,.4); }
.rg-card.rg-card-completada { border-color:rgba(28,200,133,.3); background:#f9fffe; }
.rg-card-acento { height:3px; width:100%; }
.rg-acento-basico { background:var(--na-verde); }
.rg-acento-intermedio { background:#60a5fa; }
.rg-acento-avanzado { background:var(--na-azul); }
.rg-card-body { padding:16px 18px 12px; flex:1; display:flex; flex-direction:column; gap:8px; }
.rg-badges { display:flex; gap:5px; flex-wrap:wrap; }
.rg-badge { font-size:10px; font-weight:700; padding:2px 8px; border-radius:4px; text-transform:uppercase; letter-spacing:.05em; }
.rg-badge-basico { background:#e8faf3; color:#0ea86b; }
.rg-badge-intermedio { background:#eff6ff; color:#2563eb; }
.rg-badge-avanzado { background:#f0f4ff; color:var(--na-azul); }
.rg-badge-tema { background:var(--na-fondo); color:var(--na-muted); border:1px solid var(--na-borde); }
.rg-badge-completado { background:rgba(28,200,133,.12); color:var(--na-verde-dk); border:1px solid rgba(28,200,133,.3); }
.rg-card-titulo { font-size:15px; font-weight:700; color:var(--na-azul); line-height:1.25; }
.rg-card-desc { font-size:13px; color:var(--na-muted); line-height:1.55; flex:1; }
.rg-card-meta { display:flex; gap:12px; flex-wrap:wrap; padding-top:10px; border-top:1px solid var(--na-borde); }
.rg-meta-item { font-size:12px; color:var(--na-muted); }
.rg-card-footer { padding:0 18px 16px; display:flex; align-items:center; justify-content:space-between; gap:8px; }
.rg-btn { background:var(--na-verde); color:var(--na-azul) !important; padding:8px 16px; border-radius:7px; font-size:13px; font-weight:700; text-decoration:none !important; transition:background .18s; }
.rg-btn:hover { background:var(--na-verde-dk); }
.rg-btn-ghost { background:transparent; color:var(--na-muted) !important; border:1px solid var(--na-borde); padding:8px 12px; border-radius:7px; font-size:13px; text-decoration:none !important; transition:all .18s; }
.rg-btn-ghost:hover { border-color:var(--na-azul); color:var(--na-azul) !important; }
.rg-empty { text-align:center; padding:48px 20px; color:var(--na-muted); }
.rg-empty-icon { font-size:36px; margin-bottom:10px; }
.rg-empty.hidden { display:none; }

@media(max-width:640px) {
  .rg-grid { grid-template-columns:1fr; }
  .rg-stats { gap:20px; }
  .nexel-course-stats { gap:14px; }
}