/* SIFO - hoja de estilos corporativa (extraida del mockup aprobado) */

  :root{
    --navy-950:#081527;
    --navy-900:#0E2440;
    --navy-850:#123055;
    --navy-800:#163459;
    --navy-700:#1B3F6B;
    --blue-500:#2F6FE4;
    --blue-100:#E7EEFC;
    --gold-500:#4599f2;
    --gold-400:#DBB94A;
    --gold-100:#F6EEDA;
    --gray-50:#F6F7F9;
    --gray-100:#EEF1F5;
    --gray-200:#E3E7EC;
    --gray-300:#D7DDE5;
    --gray-500:#78838F;
    --gray-700:#3E4854;
    --gray-900:#1B2430;
    --green-600:#1F9254;
    --green-100:#E4F5EB;
    --red-600:#C6423A;
    --red-100:#FBEAE8;
    --amber-600:#B5791A;
    --amber-100:#FBF0DC;
    --radius-sm:6px;
    --radius-md:10px;
    --radius-lg:16px;
    --shadow-sm:0 1px 2px rgba(8,21,39,.06), 0 1px 1px rgba(8,21,39,.04);
    --shadow-md:0 8px 24px rgba(8,21,39,.10);
    --sidebar-w:280px;
    --sidebar-w-collapsed:76px;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
    background:var(--gray-50);
    color:var(--gray-900);
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,.display{
    font-family:'Fraunces',Georgia,serif;
    font-weight:600;
    letter-spacing:-0.01em;
  }
  .mono{font-family:'JetBrains Mono',ui-monospace,monospace;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;cursor:pointer;}

  
  /* ============================================================
     PANTALLA DE INICIO DE SESION
     ============================================================ */
  #login-screen{
    min-height:100vh; display:grid; grid-template-columns: 460px 1fr; position:relative; overflow:hidden;
    background:var(--navy-950);
  }
  .login-panel{
    background:var(--navy-950);
    display:flex; flex-direction:column; justify-content:center;
    padding:56px 64px;
    position:relative;
    border-right:1px solid var(--navy-800);
  }
  .login-crest{display:flex; align-items:center; gap:14px; margin-bottom:56px;}
  .login-crest .word{color:#fff;}
  .login-crest .word .big{font-size:26px; display:block; letter-spacing:.06em;}
  .login-crest .word .small{font-size:11px; color:var(--gold-400); letter-spacing:.14em; text-transform:uppercase; margin-top:2px; display:block;}
  .login-institution{
    color:var(--gray-300); font-size:13px; line-height:1.6; margin-bottom:40px;
    border-left:2px solid var(--gold-500); padding-left:14px;
  }
  .login-institution strong{color:#fff; display:block; font-family:'Fraunces',serif; font-size:16px; font-weight:600; margin-bottom:2px;}
  .field{margin-bottom:16px;}
  .field label{display:block; font-size:11.5px; color:var(--gray-300); letter-spacing:.06em; text-transform:uppercase; margin-bottom:6px;}
  .field input{
    width:100%; background:var(--navy-850); border:1px solid var(--navy-700); color:#fff;
    padding:12px 14px; border-radius:var(--radius-sm); font-size:14px; font-family:inherit;
  }
  .field input::placeholder{color:#5C7290;}
  .field input:focus{outline:2px solid var(--gold-500); outline-offset:1px; border-color:var(--gold-500);}
  .btn-login{
    width:100%; background:var(--gold-500); color:var(--navy-950); border:none; padding:13px;
    border-radius:var(--radius-sm); font-weight:700; font-size:14px; letter-spacing:.02em;
    margin-top:8px; transition:background .15s ease;
  }
  .btn-login:hover{background:var(--gold-400);}
  .login-footnote{margin-top:28px; font-size:11.5px; color:var(--gray-500);}
  .login-art{
    position:relative;
    background:
      radial-gradient(circle at 20% 20%, rgba(201,162,39,.18), transparent 45%),
      radial-gradient(circle at 80% 75%, rgba(47,111,228,.20), transparent 50%),
      linear-gradient(160deg, var(--navy-900), var(--navy-950));
    display:flex; align-items:center; justify-content:center;
  }
  .login-art svg{width:70%; max-width:520px; opacity:.9;}
  .login-quote{
    position:absolute; bottom:56px; left:64px; right:64px; color:var(--gray-300);
    font-family:'Fraunces',serif; font-size:19px; font-weight:500; line-height:1.5; max-width:520px;
  }
  .login-quote span{color:var(--gold-400);}

  /* ============================================================
     APLICACION
     ============================================================ */
  #app-screen{display:flex; min-height:100vh;}

  /* ---------- SIDEBAR ---------- */
  .sidebar{
    width:var(--sidebar-w);
    background:var(--navy-950);
    color:#fff;
    flex-shrink:0;
    display:flex; flex-direction:column;
    position:sticky; top:0; height:100vh;
    transition:width .18s ease;
  }
  .sidebar.collapsed{width:var(--sidebar-w-collapsed);}
  .sidebar-head{
    display:flex; align-items:center; gap:12px; padding:20px 20px 18px 20px;
    border-bottom:1px solid var(--navy-800);
  }
  .crest-mark{width:34px; height:34px; flex-shrink:0;}
  .sidebar-head .word{overflow:hidden; white-space:nowrap;}
  .sidebar.collapsed .sidebar-head .word{display:none;}
  .sidebar-head .word .big{font-size:19px; font-weight:700; letter-spacing:.05em; display:block;}
  .sidebar-head .word .small{font-size:9.5px; color:var(--gold-400); letter-spacing:.12em; text-transform:uppercase; display:block; margin-top:1px;}

  .sidebar-period{
    margin:14px 16px; padding:10px 12px; background:var(--navy-850); border:1px solid var(--navy-700);
    border-radius:var(--radius-sm); font-size:11.5px; color:var(--gray-300);
    display:flex; align-items:center; justify-content:space-between; gap:8px;
  }
  .sidebar.collapsed .sidebar-period{display:none;}
  .sidebar-period .dot{width:7px; height:7px; border-radius:50%; background:var(--green-600); flex-shrink:0; box-shadow:0 0 0 3px rgba(31,146,84,.25);}
  .sidebar-period b{color:#fff; font-family:'JetBrains Mono',monospace; font-weight:600;}

  .sidebar-nav{flex:1; overflow-y:auto; padding:6px 12px 16px 12px;}
  .sidebar-nav::-webkit-scrollbar{width:6px;}
  .sidebar-nav::-webkit-scrollbar-thumb{background:var(--navy-700); border-radius:4px;}
  .nav-group{margin-bottom:2px;}
  .nav-group-label{
    font-size:10.5px; letter-spacing:.13em; text-transform:uppercase; color:#5C7290;
    padding:16px 10px 6px 10px; font-weight:700;
  }
  .sidebar.collapsed .nav-group-label{display:none;}
  .nav-item{
    display:flex; align-items:center; gap:12px; padding:9px 10px; border-radius:var(--radius-sm);
    color:var(--gray-300); font-size:13.5px; font-weight:500; margin-bottom:1px; position:relative;
    border-left:3px solid transparent;
  }
  .nav-item:hover{background:var(--navy-850); color:#fff;}
  .nav-item.active{background:var(--navy-850); color:#fff; border-left:3px solid var(--gold-500);}
  .nav-item svg{width:17px; height:17px; flex-shrink:0; opacity:.9;}
  .sidebar.collapsed .nav-item span{display:none;}
  .sidebar.collapsed .nav-item{justify-content:center;}

  .sidebar-foot{border-top:1px solid var(--navy-800); padding:14px 16px; display:flex; align-items:center; gap:10px;}
  .avatar{
    width:34px; height:34px; border-radius:50%; background:var(--gold-500); color:var(--navy-950);
    display:flex; align-items:center; justify-content:center; font-weight:700; font-size:13px; flex-shrink:0;
  }
  .sidebar-foot .who{overflow:hidden; white-space:nowrap;}
  .sidebar.collapsed .sidebar-foot .who{display:none;}
  .sidebar-foot .who .name{font-size:12.5px; font-weight:600; color:#fff;}
  .sidebar-foot .who .role{font-size:11px; color:var(--gray-500);}
  .collapse-btn{
    margin-left:auto; background:transparent; border:none; color:var(--gray-500); padding:4px;
    display:flex;
  }
  .sidebar.collapsed .collapse-btn{margin:0 auto;}
  .sidebar.collapsed .sidebar-foot{justify-content:center;}
  .sidebar.collapsed .avatar{display:none;}

  /* ---------- MAIN ---------- */
  .main{flex:1; min-width:0; display:flex; flex-direction:column;}
  .topbar{
    height:64px; background:#fff; border-bottom:1px solid var(--gray-200); display:flex; align-items:center;
    padding:0 28px; gap:20px; position:sticky; top:0; z-index:10;
  }
  .breadcrumb{font-size:12px; color:var(--gray-500); display:flex; align-items:center; gap:6px;}
  .breadcrumb b{color:var(--gray-900); font-weight:600;}
  .page-title{font-size:19px; font-weight:600;}
  .topbar-right{margin-left:auto; display:flex; align-items:center; gap:14px;}
  .period-pill{
    display:flex; align-items:center; gap:8px; background:var(--gray-100); border:1px solid var(--gray-200);
    border-radius:999px; padding:6px 14px 6px 10px; font-size:12.5px; color:var(--gray-700);
  }
  .period-pill .dot{width:7px; height:7px; border-radius:50%; background:var(--green-600);}
  .period-pill b{font-family:'JetBrains Mono',monospace; color:var(--gray-900);}
  .icon-btn{
    width:36px; height:36px; border-radius:50%; border:1px solid var(--gray-200); background:#fff;
    display:flex; align-items:center; justify-content:center; color:var(--gray-700);
  }
  .icon-btn:hover{background:var(--gray-50);}

  .content{padding:28px 32px 60px 32px; max-width:1400px;}
  .content-head{display:flex; align-items:flex-end; justify-content:space-between; margin-bottom:24px; flex-wrap:wrap; gap:14px;}
  .content-head p{color:var(--gray-500); font-size:13.5px; margin:6px 0 0 0; max-width:560px;}
  .btn-primary{
    background:var(--navy-900); color:#fff; border:none; padding:11px 20px; border-radius:var(--radius-sm);
    font-weight:600; font-size:13.5px; display:flex; align-items:center; gap:8px;
  }
  .btn-primary:hover{background:var(--navy-800);}
  .btn-ghost{
    background:#fff; color:var(--gray-700); border:1px solid var(--gray-300); padding:10px 18px; border-radius:var(--radius-sm);
    font-weight:600; font-size:13.5px;
  }
  .btn-ghost:hover{background:var(--gray-50);}

  /* KPI cards */
  .kpi-row{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:28px;}
  .kpi-card{
    background:#fff; border:1px solid var(--gray-200); border-radius:var(--radius-md); padding:18px 20px;
    box-shadow:var(--shadow-sm);
  }
  .kpi-card .label{font-size:11.5px; letter-spacing:.05em; text-transform:uppercase; color:var(--gray-500); font-weight:600;}
  .kpi-card .value{font-family:'Fraunces',serif; font-size:28px; font-weight:600; margin-top:8px; color:var(--gray-900);}
  .kpi-card .value.gold{color:var(--amber-600);}
  .kpi-card .value.red{color:var(--red-600);}
  .kpi-card .trend{font-size:11.5px; margin-top:8px; display:flex; align-items:center; gap:5px; color:var(--gray-500);}
  .trend.up{color:var(--green-600);}
  .trend.down{color:var(--red-600);}

  /* layout grid */
  .grid-2{display:grid; grid-template-columns: 1.7fr 1fr; gap:20px; align-items:start;}
  .panel{background:#fff; border:1px solid var(--gray-200); border-radius:var(--radius-md); box-shadow:var(--shadow-sm); overflow-x:auto; overflow-y:visible;}
  .panel-head{
    display:flex; align-items:center; justify-content:space-between; padding:16px 20px; border-bottom:1px solid var(--gray-100);
  }
  .panel-head h3{font-size:15px; margin:0;}
  .panel-head .tag{font-size:11px; background:var(--gold-100); color:var(--amber-600); padding:3px 10px; border-radius:999px; font-weight:700; letter-spacing:.03em;}

  table{width:100%; border-collapse:collapse; font-size:13px; min-width:560px;}
  .mono, .amount{ white-space:nowrap; }
  thead th{
    text-align:left; font-size:10.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--gray-500);
    padding:10px 20px; border-bottom:1px solid var(--gray-100); font-weight:700; background:var(--gray-50);
  }
  tbody td{padding:13px 20px; border-bottom:1px solid var(--gray-100); color:var(--gray-900); vertical-align:middle;}
  tbody tr:last-child td{border-bottom:none;}
  tbody tr:hover{background:var(--gray-50);}
  .student-name{font-weight:600;}
  .student-sub{font-size:11.5px; color:var(--gray-500); margin-top:2px;}
  .amount{font-family:'JetBrains Mono',monospace; font-weight:500;}
  .badge{font-size:10.5px; font-weight:700; padding:4px 10px; border-radius:999px; letter-spacing:.02em; display:inline-block;}
  .badge.ok{background:var(--green-100); color:var(--green-600);}
  .badge.warn{background:var(--amber-100); color:var(--amber-600);}
  .badge.late{background:var(--red-100); color:var(--red-600);}

  .aging-bar-row{padding:16px 20px; border-bottom:1px solid var(--gray-100);}
  .aging-bar-row:last-child{border-bottom:none;}
  .aging-label{display:flex; justify-content:space-between; font-size:12.5px; margin-bottom:6px;}
  .aging-label .amt{font-family:'JetBrains Mono',monospace; font-weight:600;}
  .aging-track{height:7px; background:var(--gray-100); border-radius:99px; overflow:hidden;}
  .aging-fill{height:100%; border-radius:99px;}

  .side-list{padding:6px 0;}
  .side-item{display:flex; align-items:center; gap:12px; padding:12px 20px; border-bottom:1px solid var(--gray-100);}
  .side-item:last-child{border-bottom:none;}
  .side-item .ic{
    width:36px; height:36px; border-radius:var(--radius-sm); display:flex; align-items:center; justify-content:center; flex-shrink:0;
  }
  .side-item .ic.blue{background:var(--blue-100); color:var(--blue-500);}
  .side-item .ic.gold{background:var(--gold-100); color:var(--amber-600);}
  .side-item .ic.green{background:var(--green-100); color:var(--green-600);}
  .side-item .tx{font-size:13px; flex:1;}
  .side-item .tx .t1{font-weight:600;}
  .side-item .tx .t2{color:var(--gray-500); font-size:11.5px; margin-top:1px;}

  footer.appfoot{padding:20px 32px; color:var(--gray-500); font-size:11.5px;}

  @media (max-width: 1100px){
    .kpi-row{grid-template-columns:repeat(2,1fr);}
    .grid-2{grid-template-columns:1fr;}
  }

  /* ---------- SELECT CON BUSQUEDA (js-searchable) ---------- */
  .buscable-wrap{ position:relative; }
  .buscable-input{
    width:100%; padding:10px 14px; border:1px solid var(--gray-300); border-radius:6px;
    font-size:13.5px; font-family:inherit; background:#fff;
  }
  .buscable-input:focus{ outline:2px solid var(--blue-500); outline-offset:1px; border-color:var(--blue-500); }
  .buscable-list{
    display:none; position:absolute; top:calc(100% + 4px); left:0; right:0; background:#fff;
    border:1px solid var(--gray-200); border-radius:8px; box-shadow:var(--shadow-md);
    max-height:230px; overflow-y:auto; z-index:80;
  }
  .buscable-list.open{ display:block; }
  .buscable-item{ padding:9px 14px; font-size:13px; cursor:pointer; }
  .buscable-item:hover, .buscable-item.activo{ background:var(--blue-100); }
  .buscable-empty{ padding:9px 14px; font-size:12.5px; color:var(--gray-500); }

  /* ---------- TABLA DE AMORTIZACION ---------- */
  .amort-table{ font-size:12.5px; }
  .amort-table th{ font-size:9.5px; }
  .amort-table td, .amort-table th{ padding:9px 10px; text-align:right; }
  .amort-table td:first-child, .amort-table th:first-child{ text-align:left; }
  .amort-table tr.fila-cancelada td{ color:var(--gray-400); }

  /* ---------- MODAL ---------- */
  .modal-overlay{
    display:none; position:fixed; inset:0; background:rgba(8,21,39,.55); z-index:200;
    align-items:flex-start; justify-content:center; padding:32px 16px; overflow-y:auto;
  }
  .modal-overlay.open{ display:flex; }
  .modal-box{
    background:#fff; border-radius:var(--radius-lg); width:100%; max-width:760px;
    box-shadow:var(--shadow-md); max-height:calc(100vh - 64px); display:flex; flex-direction:column;
    overflow:hidden;
  }
  .modal-box > form{ display:flex; flex-direction:column; flex:1; min-height:0; }
  .modal-header{
    display:flex; align-items:center; justify-content:space-between; padding:18px 24px;
    border-bottom:1px solid var(--gray-100); flex-shrink:0;
  }
  .modal-header h3{ margin:0; font-size:17px; }
  .modal-close{ background:none; border:none; color:var(--gray-500); cursor:pointer; padding:4px; }
  .modal-close:hover{ color:var(--gray-900); }
  .modal-tabs{ display:flex; gap:4px; padding:0 24px; border-bottom:1px solid var(--gray-100); overflow-x:auto; flex-shrink:0; }
  .modal-tab-btn{
    background:none; border:none; padding:12px 14px; font-size:12.5px; font-weight:600; color:var(--gray-500);
    border-bottom:2px solid transparent; white-space:nowrap; cursor:pointer;
  }
  .modal-tab-btn.activo{ color:var(--navy-900); border-bottom-color:var(--gold-500); }
  .modal-body{ padding:20px 24px; overflow-y:auto; flex:1; min-height:0; }
  .modal-tab-panel{ display:none; flex-direction:column; gap:12px; }
  .modal-tab-panel.activo{ display:flex; }
  .modal-footer{ padding:16px 24px; border-top:1px solid var(--gray-100); display:flex; justify-content:flex-end; gap:10px; flex-shrink:0; }