:root {
  --navy:    #0f2744;
  --blue:    #1a4a8a;
  --sky:     #3a7bd5;
  --accent:  #e8a020;
  --bg:      #f5f3ee;
  --surface: #ffffff;
  --text:    #1a1a2e;
  --muted:   #6b7280;
  --border:  #e2ddd6;
  --green:   #16a34a; --green-bg: #dcfce7; --green-b: #bbf7d0;
  --orange:  #c2670a; --orange-bg:#fff7ed; --orange-b:#fed7aa;
  --red:     #dc2626; --red-bg:   #fee2e2; --red-b:   #fecaca;
  --purple:  #7c3aed; --purple-bg:#ede9fe; --purple-b:#c4b5fd;
  --gray:    #6b7280; --gray-bg:  #f3f4f6; --gray-b:  #e5e7eb;
  --radius:  12px;
  --shadow:  0 4px 24px rgba(15,39,68,.10);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;font-size:15px;line-height:1.6}
.page{display:none;min-height:100vh}
.page.active{display:flex}

/* ── LOGIN ── */
#page-login{flex-direction:column;align-items:center;justify-content:center;padding:24px;position:relative;overflow:hidden}
#page-login::before{content:'';position:fixed;top:-40%;left:-20%;width:80vw;height:80vw;border-radius:50%;background:radial-gradient(circle,rgba(58,123,213,.12) 0%,transparent 70%);pointer-events:none}
#page-login::after{content:'';position:fixed;bottom:-30%;right:-10%;width:60vw;height:60vw;border-radius:50%;background:radial-gradient(circle,rgba(232,160,32,.08) 0%,transparent 70%);pointer-events:none}
.login-card{background:var(--surface);border-radius:20px;box-shadow:var(--shadow),0 1px 0 rgba(255,255,255,.8) inset;padding:48px 44px;width:100%;max-width:420px;position:relative;z-index:1;animation:fadeUp .5s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.login-logo{display:flex;align-items:center;gap:12px;margin-bottom:36px}
.login-logo-icon{width:44px;height:44px;background:var(--navy);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.login-logo-name{font-family:'Fraunces',serif;font-size:17px;font-weight:600;color:var(--navy);line-height:1.2}
.login-logo-sub{font-size:11px;color:var(--muted);font-weight:300;letter-spacing:.04em;text-transform:uppercase}
.login-title{font-family:'Fraunces',serif;font-size:26px;font-weight:600;color:var(--navy);margin-bottom:6px;line-height:1.2}
.login-subtitle{font-size:14px;color:var(--muted);margin-bottom:32px}
.field{margin-bottom:18px}
.field label{display:block;font-size:12px;font-weight:500;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:7px}
.field input{width:100%;height:46px;border:1.5px solid var(--border);border-radius:var(--radius);padding:0 16px;font-family:'DM Sans',sans-serif;font-size:15px;color:var(--text);background:var(--bg);transition:border-color .2s,box-shadow .2s;outline:none}
.field input:focus{border-color:var(--sky);box-shadow:0 0 0 3px rgba(58,123,213,.12);background:white}
.btn-primary{width:100%;height:48px;background:var(--navy);color:white;border:none;border-radius:var(--radius);font-family:'DM Sans',sans-serif;font-size:15px;font-weight:500;cursor:pointer;transition:background .2s,transform .1s;display:flex;align-items:center;justify-content:center;gap:8px}
.btn-primary:hover{background:var(--blue)}
.btn-primary:active{transform:scale(.99)}
.btn-primary:disabled{opacity:.6;cursor:not-allowed}
.login-error{display:none;margin-top:14px;padding:10px 14px;background:var(--red-bg);border-radius:8px;font-size:13px;color:var(--red);text-align:center}
.login-footer{margin-top:28px;padding-top:20px;border-top:1px solid var(--border);text-align:center;font-size:12px;color:var(--muted)}
.login-footer a{color:var(--sky);text-decoration:none;font-weight:500}

/* ── TOPBAR ── */
#page-dashboard{flex-direction:column;padding-top:64px}
#page-admin{flex-direction:column}
.topbar{background:var(--navy);color:white;padding:0 32px;height:64px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;position:fixed;top:0;left:0;right:0;z-index:200}
.topbar-left{display:flex;align-items:center;gap:14px}
.topbar-logo{width:36px;height:36px;background:rgba(255,255,255,.12);border-radius:8px;display:flex;align-items:center;justify-content:center}
.topbar-brand{font-family:'Fraunces',serif;font-size:17px;font-weight:600;letter-spacing:-.01em}
.topbar-brand span{font-weight:300;font-style:italic;opacity:.7}
.topbar-right{display:flex;align-items:center;gap:16px}
.topbar-avatar{width:32px;height:32px;border-radius:50%;background:var(--sky);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:500;flex-shrink:0}
.topbar-name{font-weight:500;opacity:.9;font-size:13px}
.topbar-nivel{font-size:11px;opacity:.5}
.btn-logout{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);color:white;padding:6px 14px;border-radius:8px;font-size:12px;cursor:pointer;font-family:'DM Sans',sans-serif;transition:background .2s}
.btn-logout:hover{background:rgba(255,255,255,.18)}
.admin-badge{background:var(--accent);color:white;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:500}

/* ── CONTENIDO COMÚN ── */
.main{padding:32px;padding-top:96px;flex:1;max-width:980px;margin:0 auto;width:100%}
.greeting{margin-bottom:28px;animation:fadeUp .4s ease both}
.greeting h1{font-family:'Fraunces',serif;font-size:28px;font-weight:600;color:var(--navy);line-height:1.2;margin-bottom:4px}
.greeting p{font-size:14px;color:var(--muted)}

/* ── STATUS BANNER ── */
.banner{border-radius:var(--radius);padding:16px 20px;display:flex;align-items:center;gap:14px;margin-bottom:28px;font-size:14px;animation:fadeUp .4s .05s ease both}
.banner.al-dia   {background:var(--green-bg);border:1px solid var(--green-b);color:var(--green)}
.banner.pendiente{background:var(--orange-bg);border:1px solid var(--orange-b);color:var(--orange)}
.banner.vencida  {background:var(--red-bg);border:1px solid var(--red-b);color:var(--red)}
.b-icon{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:18px}
.banner.al-dia    .b-icon{background:var(--green-b)}
.banner.pendiente .b-icon{background:var(--orange-b)}
.banner.vencida   .b-icon{background:var(--red-b)}
.b-text strong{display:block;font-weight:500}
.b-text span{font-size:13px;opacity:.85}

/* ── KPIS ── */
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px;animation:fadeUp .4s .1s ease both}
.kpi{background:var(--surface);border-radius:var(--radius);padding:20px;box-shadow:0 1px 4px rgba(15,39,68,.06);border:1px solid var(--border)}
.kpi-label{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:8px;font-weight:500}
.kpi-value{font-family:'Fraunces',serif;font-size:30px;font-weight:600;line-height:1;margin-bottom:4px}
.kpi-value.green {color:var(--green)}
.kpi-value.orange{color:var(--orange)}
.kpi-value.red   {color:var(--red)}
.kpi-value.navy  {color:var(--navy)}
.kpi-value.purple{color:var(--purple)}
.kpi-sub{font-size:12px;color:var(--muted)}

/* ── TABLA ── */
.card{background:var(--surface);border-radius:var(--radius);box-shadow:0 1px 4px rgba(15,39,68,.06);border:1px solid var(--border);overflow:hidden;animation:fadeUp .4s .15s ease both;margin-bottom:20px}
.card-header{padding:18px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.card-header h2{font-family:'Fraunces',serif;font-size:18px;font-weight:600;color:var(--navy)}
.card-header p{font-size:12px;color:var(--muted);margin-top:2px}
.year-badge{background:var(--navy);color:white;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:500}
table{width:100%;border-collapse:collapse}
thead tr{background:var(--bg)}
th{padding:10px 20px;font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);text-align:left;border-bottom:1px solid var(--border)}
td{padding:13px 20px;font-size:14px;border-bottom:1px solid var(--border);color:var(--text)}
tr:last-child td{border-bottom:none}
tr:hover td{background:rgba(245,243,238,.5)}
.mes-cell{font-weight:500;color:var(--navy)}
.monto-cell{font-family:'Fraunces',serif;font-size:15px;font-weight:600;color:var(--navy)}
.fecha-cell{font-size:13px;color:var(--muted)}

/* ── BADGES DE ESTADO ── */
.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:500}
.badge-dot{width:6px;height:6px;border-radius:50%}
.badge.pagado     {background:var(--green-bg);color:var(--green)}
.badge.pagado     .badge-dot{background:var(--green)}
.badge.vencido    {background:var(--red-bg);color:var(--red)}
.badge.vencido    .badge-dot{background:var(--red)}
.badge.proxima    {background:var(--orange-bg);color:var(--orange)}
.badge.proxima    .badge-dot{background:var(--orange)}
.badge.programada {background:var(--gray-bg);color:var(--gray)}
.badge.programada .badge-dot{background:var(--gray)}

/* ── COMPROBANTE ── */
.comp-link{display:inline-flex;align-items:center;gap:5px;font-size:12px;color:var(--sky);text-decoration:none;padding:3px 10px;border-radius:6px;border:1px solid rgba(58,123,213,.2);background:rgba(58,123,213,.05);transition:background .15s}
.comp-link:hover{background:rgba(58,123,213,.12)}
.comp-empty{font-size:12px;color:#d1d5db}

/* ── ADMIN: tabla alumnos ── */
.status-dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:6px}
.status-dot.ok  {background:var(--green)}
.status-dot.warn{background:var(--orange)}
.status-dot.bad {background:var(--red)}

/* ── LOADING / EMPTY ── */
.loading-cell,.empty-cell{text-align:center;padding:48px 24px;color:var(--muted);font-size:14px}
.spinner{width:28px;height:28px;border:2.5px solid var(--border);border-top-color:var(--sky);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 12px}
.overlay-loading{position:fixed;inset:0;background:rgba(245,243,238,0.92);z-index:999;display:none;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.overlay-loading.active{display:flex}
.overlay-spinner{width:44px;height:44px;border:3px solid var(--border);border-top-color:var(--sky);border-radius:50%;animation:spin .7s linear infinite}
.overlay-txt{font-size:14px;color:var(--muted)}
.modal-bg{position:fixed;inset:0;background:rgba(15,39,68,.45);z-index:900;display:none;align-items:center;justify-content:center;padding:20px}
.modal-bg.active{display:flex}
.modal{background:var(--surface);border-radius:20px;box-shadow:0 20px 60px rgba(15,39,68,.2);width:100%;max-width:680px;max-height:85vh;display:flex;flex-direction:column;overflow:hidden}
.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}
.modal-header h3{font-family:'Fraunces',serif;font-size:18px;font-weight:600;color:var(--navy)}
.modal-header p{font-size:12px;color:var(--muted);margin-top:2px}
.modal-close{width:32px;height:32px;border-radius:50%;border:1px solid var(--border);background:transparent;cursor:pointer;font-size:16px;color:var(--muted);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.modal-close:hover{background:var(--bg)}
.modal-body{overflow-y:auto;flex:1}
@keyframes spin{to{transform:rotate(360deg)}}

/* ── FOOTER ── */
.dash-footer{margin-top:8px;padding:18px 22px;background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);animation:fadeUp .4s .2s ease both}
.dash-footer a{color:var(--sky);text-decoration:none;font-weight:500}

/* ── ADMIN SIDEBAR ── */
.hb-line{display:block;width:18px;height:2px;background:white;border-radius:2px;transition:all .2s}
.admin-sidebar{width:220px;background:var(--navy);display:flex;flex-direction:column;flex-shrink:0;transition:width .25s ease,transform .25s ease;overflow:hidden;z-index:160;position:fixed;top:64px;left:0;bottom:0}
.admin-sidebar.collapsed{width:0!important;min-width:0!important;max-width:0!important;padding:0!important;border:none!important}
.admin-sidebar.collapsed ~ * .admin-main, #page-admin:has(.admin-sidebar.collapsed) .admin-main{left:0}
.sb-section{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,.35);padding:16px 18px 4px;white-space:nowrap}
.sb-link{display:flex;align-items:center;gap:10px;padding:10px 18px;color:rgba(255,255,255,.65);text-decoration:none;font-size:13px;font-weight:400;cursor:pointer;transition:background .15s,color .15s;white-space:nowrap;border:none;background:none;width:100%}
.sb-link:hover{background:rgba(255,255,255,.08);color:white}
.sb-link.active{background:rgba(255,255,255,.12);color:white;font-weight:500;border-left:3px solid var(--accent)}
.sb-link.disabled{opacity:.35;cursor:not-allowed;pointer-events:none}
.admin-main{min-width:0;overflow-y:auto;overflow-x:hidden;background:var(--bg);position:fixed;top:64px;left:220px;right:0;bottom:0;transition:left .25s ease}
.admin-sec{display:none;padding:28px 32px;width:100%;box-sizing:border-box}
.admin-sec.active{display:block}
.sec-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:24px;gap:16px}
.sec-title{font-family:'Fraunces',serif;font-size:26px;font-weight:600;color:var(--navy);line-height:1.2}
.sec-sub{font-size:13px;color:var(--muted);margin-top:3px}
.btn-alta{display:flex;align-items:center;gap:7px;padding:0 18px;height:38px;background:var(--navy);color:white;border:none;border-radius:var(--radius);font-family:'DM Sans',sans-serif;font-size:13px;font-weight:500;cursor:pointer;transition:background .2s;white-space:nowrap;flex-shrink:0}
.btn-alta:hover{background:var(--blue)}
.btn-accion{padding:4px 10px;border-radius:7px;border:1px solid var(--border);background:transparent;font-size:12px;cursor:pointer;font-family:'DM Sans',sans-serif;transition:all .15s}
.btn-accion.edit{color:var(--sky)} .btn-accion.edit:hover{background:rgba(58,123,213,.08)}
.btn-accion.del{color:var(--red)}  .btn-accion.del:hover{background:rgba(220,38,38,.08)}
.btn-accion.view{color:var(--green)}.btn-accion.view:hover{background:rgba(22,163,74,.08)}
.ma-lbl{font-size:11px;font-weight:500;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;display:block;margin-bottom:5px}
.ma-inp{width:100%;height:38px;border:1.5px solid var(--border);border-radius:var(--radius);padding:0 12px;font-family:'DM Sans',sans-serif;font-size:14px;color:var(--text);background:var(--bg);outline:none;transition:border-color .2s}
.ma-inp:focus{border-color:var(--sky);background:white}
.ma-sel{width:100%;height:38px;border:1.5px solid var(--border);border-radius:var(--radius);padding:0 10px;font-family:'DM Sans',sans-serif;font-size:14px;color:var(--text);background:var(--bg);outline:none}
@media(max-width:768px){
  .admin-sidebar{transform:translateX(-100%);width:220px!important}
  .admin-sidebar.open{transform:translateX(0)}
  .admin-main{left:0!important;top:64px}
  .admin-sec{padding:20px 16px}
}
@media(max-width:640px){
  .topbar{padding:0 16px}
  .topbar-nivel{display:none}
  .main{padding:20px 14px}
  .kpis{grid-template-columns:1fr 1fr;gap:10px}
  .kpis .kpi:last-child{grid-column:span 2}
  .login-card{padding:36px 22px}
  th:nth-child(3),td:nth-child(3),th:nth-child(4),td:nth-child(4){display:none}
}

/* ═══════════════════════════════════════════
   RESPONSIVE MOBILE — max-width: 640px
   ═══════════════════════════════════════════ */
@media(max-width:640px){

  /* — Topbar: comprimir para que entre todo — */
  .topbar{padding:0 12px;gap:8px}
  .topbar-left{gap:8px;min-width:0;flex:1}
  .topbar-right{gap:8px;flex-shrink:0}
  .topbar-brand{font-size:14px}
  .topbar-name{display:none}
  .topbar-nivel{display:none}
  .topbar-avatar{width:28px;height:28px;font-size:11px;flex-shrink:0}
  .admin-badge{display:none}
  .btn-logout{padding:5px 10px;font-size:11px}

  /* — KPIs: 2 columnas parejas siempre — */
  .kpis{grid-template-columns:1fr 1fr!important;gap:10px}
  .kpis .kpi{grid-column:span 1!important}
  /* Si hay cantidad impar, el último ocupa todo el ancho */
  .kpis .kpi:last-child:nth-child(odd){grid-column:span 2!important}
  .kpi{padding:14px 16px}
  .kpi-value{font-size:28px}

  /* — Card-header: badge año no tape el texto — */
  .card-header{flex-wrap:wrap;gap:8px}
  .year-badge{align-self:flex-start;flex-shrink:0}

  /* — Header de sección: título + botón en columna — */
  .sec-header{flex-direction:column;align-items:flex-start;gap:10px}
  .sec-header .btn-alta{width:100%;justify-content:center}

  /* — Tablas: scroll horizontal — */
  .card > table, table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}

  /* Tabla alumno (cuotas): ocultar Forma de pago, mostrar el resto */
  #d-tbody td:nth-child(5),
  #page-dashboard .card thead th:nth-child(5){display:none}

  /* Alumnos admin: ocultar Modalidad, Usuario */
  #al-tbody td:nth-child(3), #al-tbody td:nth-child(4),
  #sec-alumnos thead th:nth-child(3), #sec-alumnos thead th:nth-child(4){display:none}

  /* Pagos: ocultar Nivel, Pagas, Programadas — dejar Alumno, Vencidas, Este mes, Estado, Detalle */
  #pag-tbody td:nth-child(2), #pag-tbody td:nth-child(3), #pag-tbody td:nth-child(6),
  #sec-pagos thead th:nth-child(2), #sec-pagos thead th:nth-child(3), #sec-pagos thead th:nth-child(6){display:none}

  /* Profesores: ocultar Email, Teléfono, Usuario */
  #pro-tbody td:nth-child(2), #pro-tbody td:nth-child(3), #pro-tbody td:nth-child(5),
  #sec-profesores thead th:nth-child(2), #sec-profesores thead th:nth-child(3), #sec-profesores thead th:nth-child(5){display:none}

  /* Egresos: ocultar Categoría, Forma de pago */
  #eg-tbody td:nth-child(3), #eg-tbody td:nth-child(5),
  #sec-egresos thead th:nth-child(3), #sec-egresos thead th:nth-child(5){display:none}

  /* Dashboard admin — tabla alertas: ocultar Nivel, Este mes */
  #a-tbody-alert td:nth-child(2), #a-tbody-alert td:nth-child(4),
  #sec-dashboard thead th:nth-child(2), #sec-dashboard thead th:nth-child(4){display:none}

  /* — Modales: full width — */
  .modal{margin:8px;width:calc(100% - 16px);max-width:none!important}

  /* — Card sin padding lateral excesivo — */
  .card{border-radius:10px}
  .admin-sec{padding:16px 12px}
  .main{padding:16px 12px}
  .sec-header{padding-bottom:4px}

  /* — Greeting — */
  .greeting h1{font-size:24px}
}

/* Asegurar que el contenido del admin no desborde al colapsar sidebar */
.admin-main > .admin-sec { min-width: 0; width: 100%; box-sizing: border-box; }
.admin-sec { min-width: 0; }