:root{
    --bg:#0a0a12;
    --bg-elevated:#12121e;
    --card:#161624;
    --card-soft:#1b1b2c;
    --card-border:#26263a;
    --purple-1:#7c5cff;
    --purple-2:#5b3df0;
    --green:#22c55e;
    --amber:#f5a623;
    --blue:#4ea1ff;
    --text:#eceaf5;
    --text-dim:#8d8ba3;
    --text-faint:#5c5a72;
    --danger:#ff5c7a;
    --radius:16px;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{ touch-action:manipulation; }
  body{
    touch-action:manipulation;
    background:
      radial-gradient(circle at 15% -10%, rgba(124,92,255,0.16), transparent 45%),
      radial-gradient(circle at 100% 20%, rgba(91,61,240,0.10), transparent 40%),
      var(--bg);
    color:var(--text);
    font-family:'Inter', system-ui, sans-serif;
    min-height:100vh;
    overflow-x:hidden;
  }
  h1,h2,h3,.brand{ font-family:'Space Grotesk', sans-serif; }
  input, select{ font-family:'Inter', sans-serif; }

  /* ===== TOP BAR ===== */
  .topbar{
    position:sticky; top:0; z-index:20;
    display:flex; align-items:center; justify-content:space-between;
    padding:18px 20px;
    background:rgba(10,10,18,0.75);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--card-border);
  }
  .topbar-left{ display:flex; align-items:center; gap:14px; }
  .icon-btn{
    width:38px; height:38px; border-radius:11px;
    display:flex; align-items:center; justify-content:center;
    background:var(--card); border:1px solid var(--card-border);
    color:var(--text); cursor:pointer;
  }
  .icon-btn svg{ width:19px; height:19px; }
  .topbar h1{ font-size:19px; font-weight:700; letter-spacing:-0.01em; }

  /* ===== SIDEBAR ===== */
  .overlay{
    position:fixed; inset:0; background:rgba(0,0,0,0.55);
    opacity:0; pointer-events:none; transition:opacity .25s ease;
    z-index:29;
  }
  .overlay.show{ opacity:1; pointer-events:auto; }

  .sidebar{
    position:fixed; top:0; left:0; height:100%; width:264px;
    background:var(--bg-elevated);
    border-right:1px solid var(--card-border);
    transform:translateX(-105%);
    transition:transform .28s cubic-bezier(.4,0,.2,1);
    z-index:30;
    display:flex; flex-direction:column;
    padding:16px 12px;
    overflow-y:auto;
  }
  .sidebar.open{ transform:translateX(0); }

  .sidebar-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; padding:0 4px;}
  .sidebar-head .brand{ display:flex; align-items:center; gap:9px; font-weight:700; font-size:14.5px;}
  .brand-mark{
    width:30px; height:30px; border-radius:9px;
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    display:flex; align-items:center; justify-content:center;
    font-size:14px; font-weight:700;
  }

  .user-card{
    display:flex; align-items:center; gap:10px;
    background:var(--card); border:1px solid var(--card-border);
    border-radius:12px; padding:10px 12px; margin-bottom:10px;
  }
  .avatar{
    width:34px; height:34px; border-radius:50%;
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    display:flex; align-items:center; justify-content:center; font-weight:700;
    flex-shrink:0; font-size:13px;
  }
  .user-card .name{ font-weight:600; font-size:12.5px; }
  .user-card .status{ font-size:10.5px; color:var(--text-dim); }
  .user-card .status.status-cliente{ color:var(--green); font-weight:600; }
  .user-card .status.status-admin{ color:var(--amber); font-weight:600; }

  .balance-card{
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    border-radius:12px; padding:14px; margin-bottom:16px;
    text-align:center;
  }
  .balance-card .label{
    display:flex; align-items:center; justify-content:center; gap:6px;
    font-size:10.5px; font-weight:600; letter-spacing:0.06em; opacity:0.9; margin-bottom:6px;
  }
  .balance-card .amount{ font-size:23px; font-weight:700; margin-bottom:8px; }
  .btn-ghost-light{
    display:inline-flex; align-items:center; gap:6px;
    background:rgba(255,255,255,0.16);
    border:1px solid rgba(255,255,255,0.3);
    color:#fff; border-radius:9px; padding:6px 12px;
    font-size:11.5px; font-weight:600; cursor:pointer;
  }

  .nav-section-label{
    font-size:10px; font-weight:700; letter-spacing:0.07em;
    color:var(--text-faint); margin:12px 6px 6px;
  }
  .nav-item{
    display:flex; align-items:center; gap:10px;
    padding:9px 10px; border-radius:9px;
    color:var(--text-dim); font-size:12.5px; font-weight:500;
    cursor:pointer; margin-bottom:1px;
  }
  .nav-item svg{ width:16px; height:16px; flex-shrink:0; }
  .nav-item:hover{ background:rgba(255,255,255,0.04); color:var(--text); }
  .nav-item.active{
    background:rgba(124,92,255,0.16); color:#c9beff;
    border:1px solid rgba(124,92,255,0.3);
  }

  .sidebar-bottom{ margin-top:auto; padding-top:14px; }
  .logout-btn{
    display:flex; align-items:center; justify-content:center; gap:8px;
    width:100%; padding:10px; border-radius:10px;
    background:rgba(255,92,122,0.1); border:1px solid rgba(255,92,122,0.3);
    color:var(--danger); font-weight:600; font-size:12.5px; cursor:pointer;
  }

  /* ===== MAIN CONTENT ===== */
  main{ padding:20px 16px 110px; max-width:720px; margin:0 auto; }
  .view{ display:none; }
  .view.active{ display:block; }

  .section-title{ font-size:15px; font-weight:700; margin:22px 4px 12px; color:var(--text); }
  .section-title:first-child{ margin-top:4px; }

  /* ===== SEARCH + FILTER CHIPS (Buy Keys) ===== */
  .search-bar{
    display:flex; align-items:center; gap:10px;
    background:var(--card); border:1px solid var(--card-border);
    border-radius:14px; padding:13px 16px; margin-bottom:14px;
  }
  .search-bar svg{ width:18px; height:18px; color:var(--text-faint); flex-shrink:0; }
  .search-bar input{
    background:none; border:none; outline:none; color:var(--text);
    font-size:14px; width:100%;
  }
  .search-bar input::placeholder{ color:var(--text-faint); }

  .chip-row{ display:flex; gap:9px; overflow-x:auto; padding-bottom:6px; margin-bottom:18px; }
  .chip-row::-webkit-scrollbar{ display:none; }
  .chip{
    flex-shrink:0; padding:9px 18px; border-radius:20px;
    background:var(--card); border:1px solid var(--card-border);
    color:var(--text-dim); font-size:13px; font-weight:700;
    letter-spacing:0.02em; cursor:pointer; white-space:nowrap;
  }
  .chip.active{
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    border-color:transparent; color:#fff;
  }

  .product-grid{ display:grid; grid-template-columns:1fr 1fr; gap:12px; }
  .product-card{
    background:var(--card); border:1px solid var(--card-border);
    border-radius:var(--radius); overflow:hidden; display:flex; flex-direction:column;
  }
  .product-card-top{
    padding:12px 12px 10px; border-bottom:1px solid var(--card-border);
  }
  .product-name{
    font-size:13.5px; font-weight:700; line-height:1.25;
    display:block; margin-bottom:6px;
  }
  .product-tag{
    display:inline-flex; align-items:center; gap:4px;
    border:1px solid rgba(124,92,255,0.35); color:#b6a8ff;
    background:rgba(124,92,255,0.08);
    font-size:9.5px; font-weight:700; letter-spacing:0.03em;
    padding:3px 8px; border-radius:20px;
  }
  .product-tag svg{ width:9px; height:9px; }

  .product-image-wrap{
    margin:8px; border-radius:10px; overflow:hidden;
    aspect-ratio:1/1; background:linear-gradient(135deg, var(--purple-2), var(--purple-1));
    display:flex; align-items:center; justify-content:center;
  }
  .product-image-wrap img{ width:100%; height:100%; object-fit:cover; display:block; }
  .product-image-fallback{
    font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:20px; color:#fff;
  }

  .product-info{ padding:4px 12px 12px; display:flex; flex-direction:column; gap:6px; }
  .product-meta{ font-size:11px; color:var(--text-dim); }
  .product-price{ font-size:12px; }
  .product-price .label{ color:var(--text-dim); font-weight:500; }
  .product-price .value{ color:#a996ff; font-weight:700; }
  .btn-buy{
    display:flex; align-items:center; justify-content:center; gap:6px;
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    border:none; color:#fff; font-weight:600; font-size:13px;
    padding:10px; border-radius:10px; cursor:pointer; width:100%;
  }
  .btn-download{
    display:flex; align-items:center; justify-content:center; gap:6px;
    background:#4ea1ff; border:none; color:#08203d; font-weight:700; font-size:13px;
    padding:10px; border-radius:10px; cursor:pointer; width:100%;
    text-decoration:none;
  }
  .btn-tutorial{
    display:flex; align-items:center; justify-content:center; gap:6px;
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    border:none; color:#fff; font-weight:700; font-size:13px;
    padding:10px; border-radius:10px; cursor:pointer; width:100%;
    text-decoration:none; margin-bottom:10px;
  }
  .success-product-line{
    text-align:center; font-size:14px; font-weight:700; color:var(--text);
    margin-bottom:12px;
  }
  .success-product-line span{ color:var(--text-dim); font-weight:600; }

  .success-info-box{
    background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:12px; padding:4px 14px; margin-bottom:14px;
  }
  .success-info-box .row-line{
    display:flex; align-items:center; justify-content:space-between;
    padding:9px 0; font-size:13px;
  }
  .success-info-box .row-line + .row-line{ border-top:1px solid var(--card-border); }

  .key-reveal-row{ display:flex; align-items:center; gap:8px; margin-bottom:10px; }
  .key-reveal-row .key-reveal-label{
    font-size:12.5px; font-weight:700; color:var(--text-dim); flex-shrink:0;
  }
  .key-reveal-row .key-reveal{ flex:1; margin-bottom:0; }

  .success-actions-row{ display:flex; gap:10px; margin-bottom:10px; }
  .success-actions-row .btn-tutorial,
  .success-actions-row .btn-download{ flex:1; margin-bottom:0; }

  .placeholder-panel{
    background:var(--card); border:1px dashed var(--card-border);
    border-radius:var(--radius); padding:32px 20px; text-align:center;
    color:var(--text-dim); font-size:13.5px; line-height:1.6;
  }
  .placeholder-panel strong{ color:var(--text); display:block; margin-bottom:6px; font-size:15px; }

  /* ===== GENERIC PANEL / FILTER CARD ===== */
  .panel{
    background:var(--card); border:1px solid var(--card-border);
    border-radius:var(--radius); padding:16px; margin-bottom:16px;
  }
  .field-label{ font-size:12.5px; font-weight:600; color:var(--text-dim); margin-bottom:7px; }
  .select-field, .text-field{
    width:100%; background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:11px; padding:12px 14px; color:var(--text); font-size:14px;
    outline:none; appearance:none;
  }
  .select-field{
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238d8ba3' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat:no-repeat; background-position:right 12px center; background-size:16px;
    padding-right:36px;
  }
  .field-row{ display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-bottom:12px; }
  .btn-row{ display:flex; gap:10px; }
  .btn-primary{
    flex:1; display:flex; align-items:center; justify-content:center; gap:7px;
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    border:none; color:#fff; font-weight:700; font-size:14px;
    padding:12px; border-radius:11px; cursor:pointer;
    box-shadow:0 4px 16px rgba(124,92,255,0.35);
  }
  .btn-secondary{
    flex:1; display:flex; align-items:center; justify-content:center; gap:7px;
    background:var(--card-soft); border:1px solid var(--card-border); color:var(--text);
    font-weight:600; font-size:14px; padding:12px; border-radius:11px; cursor:pointer;
  }
  .btn-green{
    display:flex; align-items:center; justify-content:center; gap:7px;
    background:var(--green); border:none; color:#08210f;
    font-weight:700; font-size:13.5px; padding:11px; border-radius:11px; cursor:pointer;
  }

  .panel-header{ display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; flex-wrap:wrap; gap:10px;}
  .panel-header .title{ display:flex; align-items:center; gap:8px; font-size:15px; font-weight:700; }
  .panel-header .title svg{ width:18px; height:18px; color:var(--purple-1); }

  .empty-state{
    text-align:center; padding:26px 16px; color:var(--text-dim);
    font-size:13.5px; background:var(--card-soft); border-radius:12px;
  }

  /* ===== STAT CARDS (Transacciones) ===== */
  .stat-grid{ display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:16px; }
  .stat-card{
    background:var(--card); border:1px solid var(--card-border);
    border-radius:var(--radius); padding:16px;
  }
  .stat-icon{
    width:34px; height:34px; border-radius:10px; margin-bottom:14px;
    display:flex; align-items:center; justify-content:center;
  }
  .stat-icon svg{ width:17px; height:17px; }
  .stat-icon.purple{ background:rgba(124,92,255,0.16); color:#a996ff; }
  .stat-icon.green{ background:rgba(34,197,94,0.16); color:var(--green); }
  .stat-icon.blue{ background:rgba(78,161,255,0.16); color:var(--blue); }
  .stat-value{ font-size:22px; font-weight:700; margin-bottom:4px; }
  .stat-label{ font-size:10.5px; font-weight:700; letter-spacing:0.06em; color:var(--text-faint); }

  /* ===== LIST ROWS (My Keys / Depósitos / Transacciones history) ===== */
  .list-row{
    background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:12px; padding:14px; margin-bottom:10px;
  }
  .list-row .row-line{
    display:flex; align-items:center; justify-content:space-between;
    padding:8px 0; font-size:13.5px;
  }
  .list-row .row-line + .row-line{ border-top:1px solid var(--card-border); }
  .row-label{ color:var(--text-dim); font-size:12.5px; font-weight:600; }
  .row-value{ font-weight:600; }
  .mono-tag{
    background:var(--card); border:1px solid var(--card-border);
    border-radius:8px; padding:5px 10px; font-size:12px; font-family:monospace;
    color:var(--text-dim);
  }
  .badge{
    display:inline-flex; align-items:center; gap:5px;
    padding:5px 11px; border-radius:8px; font-size:12px; font-weight:700;
  }
  .badge-pending{ background:rgba(245,166,35,0.15); color:var(--amber); }
  .badge-completed{ background:rgba(34,197,94,0.15); color:var(--green); }
  .badge-failed{ background:rgba(255,92,122,0.15); color:var(--danger); }
  .badge-gateway{ background:rgba(124,92,255,0.15); color:#b6a8ff; }
  .badge-gateway.binance{ background:rgba(245,166,35,0.15); color:var(--amber); }

  /* ===== ADD FUNDS ===== */
  .tab-row{ display:flex; gap:10px; margin-bottom:18px; }
  .tab-btn{
    flex:1; display:flex; align-items:center; justify-content:center; gap:8px;
    padding:13px; border-radius:12px; font-size:14px; font-weight:700; cursor:pointer;
    background:var(--card); border:1px solid var(--card-border); color:var(--text-dim);
  }
  .tab-btn.active{
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    color:#fff; border-color:transparent;
  }
  .amount-field{
    display:flex; align-items:center; gap:10px;
    background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:12px; padding:14px 16px; margin-bottom:8px;
  }
  .amount-field span{ color:var(--text-dim); font-weight:700; font-size:17px; }
  .amount-field input{
    background:none; border:none; outline:none; color:var(--text);
    font-size:20px; font-weight:700; width:100%;
  }
  .hint-text{ font-size:12px; color:var(--text-faint); margin-bottom:14px; }
  .quick-amounts{ display:grid; grid-template-columns:repeat(4,1fr); gap:8px; margin-bottom:18px; }
  .quick-amount{
    padding:12px 4px; text-align:center; border-radius:11px;
    background:var(--card-soft); border:1px solid var(--card-border);
    color:var(--text); font-size:13px; font-weight:700; cursor:pointer;
  }
  .security-note{
    display:flex; align-items:center; justify-content:center; gap:6px;
    font-size:12px; color:var(--text-faint); margin:12px 0 22px;
  }
  .security-note svg{ width:14px; height:14px; }

  /* ===== SETTINGS ===== */
  .form-group{ margin-bottom:14px; }
  .form-group label{ display:block; font-size:12.5px; font-weight:600; color:var(--text-dim); margin-bottom:7px; }
  .form-group input{
    width:100%; background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:11px; padding:12px 14px; color:var(--text); font-size:14px; outline:none;
  }
  .form-group input:disabled{ color:var(--text-faint); }
  .form-group input:focus{ border-color:var(--purple-1); }

  /* ===== MODAL (Confirm Purchase) ===== */
  .modal-overlay{
    position:fixed; inset:0; background:rgba(0,0,0,0.65);
    display:none; align-items:flex-end; justify-content:center;
    z-index:50; backdrop-filter:blur(2px);
  }
  .modal-overlay.show{ display:flex; }

  /* ===== Variante centrada (ventana de "procesando pago") ===== */
  .modal-overlay-center{
    align-items:center !important;
    backdrop-filter:blur(8px);
    background:rgba(5,5,12,0.6);
  }
  .modal-center-card{
    background:var(--bg-elevated); border:1px solid var(--card-border);
    border-radius:20px; padding:38px 28px; max-width:300px; width:88%;
    text-align:center; box-shadow:0 24px 60px rgba(0,0,0,0.55);
  }
  .modal-center-card .spinner{ margin:0 auto 16px; }
  .modal-center-card p{ color:var(--text-dim); font-weight:600; font-size:14px; margin:0; }

  .modal{
    width:100%; max-width:480px;
    background:var(--bg-elevated); border:1px solid var(--card-border);
    border-radius:22px 22px 0 0; padding:22px 20px 26px;
    max-height:88vh; overflow-y:auto;
    animation:slideUp .25s ease;
  }
  @keyframes slideUp{ from{ transform:translateY(24px); opacity:0; } to{ transform:translateY(0); opacity:1; } }
  .modal-header{ display:flex; align-items:center; justify-content:space-between; margin-bottom:18px; }
  .modal-header .title{ display:flex; align-items:center; gap:10px; font-size:19px; font-weight:700; }
  .modal-header .title svg{ width:20px; height:20px; color:var(--purple-1); }
  .modal-product-name{
    background:var(--card); border:1px solid var(--card-border);
    border-radius:12px; padding:16px; font-weight:700; font-size:16px; margin-bottom:18px;
  }
  .qty-row{ display:flex; align-items:center; gap:10px; margin-bottom:16px; }
  .qty-btn{
    width:48px; height:44px; border-radius:11px;
    background:var(--card-soft); border:1px solid var(--card-border);
    color:var(--text); font-size:18px; font-weight:700; cursor:pointer;
    touch-action:manipulation;
  }
  .qty-btn:disabled{
    opacity:0.35; cursor:not-allowed; color:var(--text-faint);
  }
  .btn-pay:disabled, .btn-cancel:disabled{
    opacity:0.4; cursor:not-allowed;
  }

  /* ===== Estado de carga / éxito del modal de compra ===== */
  .modal-loading{ text-align:center; padding:44px 10px 30px; }
  .spinner{
    width:38px; height:38px; margin:0 auto;
    border:3px solid var(--card-border); border-top-color:var(--purple-1);
    border-radius:50%; animation:spin .7s linear infinite;
  }
  @keyframes spin{ to{ transform:rotate(360deg); } }
  .modal-loading p{ margin-top:16px; color:var(--text-dim); font-weight:600; font-size:14px; }

  .success-icon{
    width:56px; height:56px; border-radius:50%; margin:0 auto 12px;
    background:rgba(34,197,94,0.15); display:flex; align-items:center; justify-content:center; color:var(--green);
  }
  .success-icon svg{ width:28px; height:28px; }
  .modal-success-title{ text-align:center; font-size:19px; font-weight:700; margin-bottom:22px; }

  .key-reveal{
    display:flex; align-items:center; justify-content:space-between; gap:10px;
    background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:12px; padding:13px 14px; margin-bottom:10px;
  }
  .key-reveal span{
    font-family:monospace; font-size:14px; font-weight:700; color:#c9beff; word-break:break-all;
  }
  .key-reveal button{
    background:var(--card); border:1px solid var(--card-border); border-radius:8px;
    padding:8px; cursor:pointer; color:var(--text-dim); flex-shrink:0; display:flex;
  }
  .key-reveal button svg{ width:15px; height:15px; }
  .key-reveal button.copied{ color:var(--green); border-color:rgba(34,197,94,0.4); }

  .copy-key-btn{
    background:var(--card); border:1px solid var(--card-border); border-radius:7px;
    padding:5px; cursor:pointer; color:var(--text-dim); flex-shrink:0; display:flex;
  }
  .copy-key-btn svg{ width:13px; height:13px; }
  .copy-key-btn.copied{ color:var(--green); border-color:rgba(34,197,94,0.4); }
  .qty-value{
    flex:1; text-align:center; background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:11px; padding:11px; font-weight:700; font-size:16px;
  }
  .total-row{
    display:flex; align-items:center; justify-content:space-between;
    background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:12px; padding:14px 16px; margin-bottom:10px;
  }
  .total-row .label{ color:var(--text-dim); font-size:14px; }
  .total-row .value{ color:#c9beff; font-weight:700; font-size:19px; }
  .wallet-row{
    display:flex; align-items:center; justify-content:space-between;
    padding:0 4px 14px; font-size:13.5px; color:var(--text-dim);
  }
  .modal-note{
    display:flex; gap:8px; font-size:12.5px; color:var(--text-dim);
    background:rgba(124,92,255,0.08); border:1px solid rgba(124,92,255,0.25);
    border-radius:11px; padding:12px 14px; margin-bottom:18px; line-height:1.5;
  }
  .modal-note strong{ color:#c9beff; }
  .modal-note svg{ width:16px; height:16px; flex-shrink:0; margin-top:1px; color:#a996ff; }
  .modal-actions{ display:flex; gap:10px; }
  .btn-pay{
    flex:2; display:flex; align-items:center; justify-content:center; gap:7px;
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    border:none; color:#fff; font-weight:700; font-size:14px;
    padding:14px; border-radius:12px; cursor:pointer;
  }
  .btn-cancel{
    flex:1; background:var(--card-soft); border:1px solid var(--card-border);
    color:var(--text-dim); font-weight:600; font-size:14px;
    padding:14px; border-radius:12px; cursor:pointer;
  }

  /* ===== BOTTOM NAV (blurred) ===== */
  .bottom-nav{
    position:fixed; bottom:14px; left:50%; transform:translateX(-50%);
    width:calc(100% - 28px); max-width:420px;
    display:flex; align-items:center; justify-content:space-between;
    background:rgba(18,18,30,0.65);
    backdrop-filter:blur(18px); -webkit-backdrop-filter:blur(18px);
    border:1px solid rgba(255,255,255,0.08);
    border-radius:22px; padding:10px 14px;
    z-index:15;
  }
  .bn-item{
    display:flex; flex-direction:column; align-items:center; gap:4px;
    color:var(--text-faint); font-size:10.5px; font-weight:600;
    background:none; border:none; cursor:pointer;
  }
  .bn-item svg{ width:20px; height:20px; }
  .bn-item.active{ color:var(--purple-1); font-weight:700; }
  .bn-center{
    width:46px; height:46px; border-radius:50%; margin-top:-26px;
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    display:flex; align-items:center; justify-content:center;
    box-shadow:0 6px 18px rgba(124,92,255,0.45);
    border:4px solid var(--bg); cursor:pointer;
  }
  .bn-center svg{ width:20px; height:20px; color:#fff; }

  .whatsapp-fab{
    position:fixed; bottom:92px; right:18px; z-index:16;
    width:50px; height:50px; border-radius:50%;
    background:#25D366; display:flex; align-items:center; justify-content:center;
    box-shadow:0 6px 18px rgba(37,211,102,0.45);
    text-decoration:none;
  }

  .nav-authed{
    display:flex; align-items:center; justify-content:space-between; width:100%;
  }
  .nav-guest{
    display:none; align-items:center; gap:10px; width:100%;
  }
  body.logged-out .nav-authed{ display:none; }
  body.logged-out .nav-guest{ display:flex; }
  body.logged-out #openSidebar{ display:none; }

  .nav-guest button{
    flex:1; padding:12px; border-radius:14px; font-size:14px; font-weight:700; cursor:pointer;
  }
  .nav-guest .btn-outline{
    background:transparent; border:1.5px solid var(--purple-1); color:#c9beff;
  }
  .nav-guest .btn-fill{
    background:linear-gradient(135deg, var(--purple-1), var(--purple-2));
    border:none; color:#fff;
  }

  /* ===== LOGIN / REGISTER ===== */
  .auth-card{
    max-width:420px; margin:30px auto 10px;
    background:var(--card); border:1px solid var(--card-border);
    border-radius:24px; padding:32px 24px; text-align:center;
  }
  .auth-brand{
    display:inline-flex; align-items:center; gap:8px;
    background:rgba(124,92,255,0.12); border:1px solid rgba(124,92,255,0.3);
    color:#c9beff; font-weight:700; font-size:13px; letter-spacing:0.03em;
    padding:7px 16px; border-radius:20px; margin-bottom:20px;
  }
  .auth-title{ font-size:26px; font-weight:700; margin-bottom:8px; }
  .auth-subtitle{ font-size:14px; color:var(--text-dim); margin-bottom:26px; }
  .auth-card .form-group{ text-align:left; }
  .auth-card .form-group label{ font-size:11.5px; letter-spacing:0.04em; }
  .password-wrap{ position:relative; }
  .password-wrap input{ padding-right:44px; }
  .toggle-pass{
    position:absolute; right:10px; top:50%; transform:translateY(-50%);
    background:none; border:none; color:var(--text-faint); cursor:pointer; font-size:15px;
  }
  .auth-link{
    display:block; text-align:right; font-size:13px; font-weight:600;
    color:#a996ff; text-decoration:none; margin:-6px 0 6px;
  }
  .auth-switch{ font-size:13.5px; color:var(--text-dim); margin-top:18px; }
  .auth-switch a{ color:#a996ff; font-weight:700; text-decoration:none; }
  .auth-footnote{
    display:flex; align-items:center; justify-content:center; gap:6px;
    font-size:11.5px; color:var(--text-faint); margin-top:22px;
  }
  .auth-footnote svg{ width:14px; height:14px; flex-shrink:0; }

  /* ===== MODO CLARO ===== */
  :root[data-theme="light"]{
    --bg:#f3f2fa;
    --bg-elevated:#ffffff;
    --card:#ffffff;
    --card-soft:#f2f1fa;
    --card-border:#e3e1f0;
    --text:#171625;
    --text-dim:#6b6880;
    --text-faint:#9896ac;
  }
  :root[data-theme="light"] .overlay{ background:rgba(20,18,40,0.35); }
  :root[data-theme="light"] .topbar{ background:rgba(255,255,255,0.75); }
  :root[data-theme="light"] .bottom-nav{ background:rgba(255,255,255,0.7); border-color:rgba(20,18,40,0.08); }
  :root[data-theme="light"] .bn-center{ border-color:var(--bg); }

  /* ===== INPUT DE ARCHIVO (comprobante de pago) ===== */
  input[type="file"]{
    width:100%; background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:11px; padding:10px 12px; color:var(--text-dim); font-size:12.5px;
  }
  .file-preview{
    display:flex; align-items:center; gap:10px; margin-top:10px;
    background:var(--card-soft); border:1px solid var(--card-border);
    border-radius:11px; padding:8px 10px;
  }
  .file-preview img{ width:44px; height:44px; border-radius:8px; object-fit:cover; }
  .file-preview span{ font-size:12px; color:var(--text-dim); word-break:break-all; }

  .btn-pay:disabled{ cursor:not-allowed; }

  /* ===== PANTALLA DE BIENVENIDA ===== */
  #introOverlay{
    position:fixed; inset:0; z-index:9999;
    display:flex; align-items:center; justify-content:center;
    background:
      radial-gradient(circle at 50% 42%, rgba(124,92,255,0.14), transparent 60%),
      var(--bg);
    transition:opacity .5s ease;
  }
  #introOverlay.fade-out{ opacity:0; pointer-events:none; }

  .intro-content{ text-align:center; padding:0 20px; }

  .intro-line{
    width:0; height:2px; margin:0 auto 26px;
    background:linear-gradient(90deg, transparent, #d946ef, transparent);
    box-shadow:0 0 22px 2px rgba(217,70,239,0.7);
    animation:introLineGrow .6s ease-out forwards;
  }
  @keyframes introLineGrow{
    from{ width:0; opacity:0; }
    to{ width:150px; opacity:1; }
  }

  .intro-title{
    font-family:'Space Grotesk', sans-serif; font-weight:700;
    font-size:30px; letter-spacing:0.06em; color:#fff;
  }
  .intro-title span{
    display:inline-block; opacity:0; filter:blur(8px);
    animation:introLetterIn .4s ease forwards;
    animation-delay:calc(.5s + var(--i, 0) * .06s);
  }
  .intro-title .intro-space{ display:inline-block; width:14px; }
  @keyframes introLetterIn{
    to{ opacity:1; filter:blur(0); }
  }

  .intro-subtitle{
    opacity:0; margin-top:14px;
    font-size:11px; font-weight:600; letter-spacing:0.32em;
    color:var(--text-faint);
    animation:introFadeUp .6s ease forwards; animation-delay:1.5s;
  }
  @keyframes introFadeUp{
    from{ opacity:0; transform:translateY(6px); }
    to{ opacity:1; transform:translateY(0); }
  }

  .intro-dots{
    position:absolute; bottom:76px; left:50%; transform:translateX(-50%);
    display:flex; gap:8px;
  }
  .intro-dots span{
    width:7px; height:7px; border-radius:50%; background:var(--purple-1);
    opacity:.3; animation:introDotPulse 1.4s ease-in-out infinite;
  }
  .intro-dots span:nth-child(2){ animation-delay:.2s; }
  .intro-dots span:nth-child(3){ animation-delay:.4s; }
  @keyframes introDotPulse{
    0%, 80%, 100%{ opacity:.3; transform:scale(.85); }
    40%{ opacity:1; transform:scale(1.15); }
  }

  .intro-footer{
    position:absolute; bottom:32px; left:50%; transform:translateX(-50%);
    display:flex; align-items:center; gap:6px;
    font-size:10px; font-weight:600; letter-spacing:0.18em; color:var(--text-faint);
    opacity:0; animation:introFadeUp .6s ease forwards; animation-delay:1.8s;
  }