:root {
    --spe-navy: #0B2545;
    --spe-navy-dark: #081b34;
    --spe-green: #1FA971;
    --spe-green-dark: #17845a;
    --spe-white: #FFFFFF;
    --spe-bg: #F3F6F9;
    --spe-ink: #1F2A3C;
    --spe-muted: #6B7A90;
    --spe-border: #E3E8EF;
    --sidebar-w: 236px;
  }

  * { box-sizing: border-box; }

  html, body {
    height: 100%;
    margin: 0;
    background: var(--spe-bg);
    color: var(--spe-ink);
    font-family: 'Inter', -apple-system, Segoe UI, sans-serif;
    font-size: 14px;
  }

  h1, h2, h3, h4, h5, .brand-font {
    font-family: 'Poppins', 'Inter', sans-serif;
  }

  a { text-decoration: none; }

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

  /* ===== Sidebar ===== */
  #sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--spe-navy) 0%, var(--spe-navy-dark) 100%);
    color: #dbe4f2;
    position: fixed;
    top: 0; bottom: 0; left: 0;
    display: flex;
    flex-direction: column;
    z-index: 1030;
    transition: transform .2s ease;
  }

  #sidebar .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 18px;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  #sidebar .brand .mark {
    width: 34px; height: 34px;
    border-radius: 9px;
    background: var(--spe-green);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; color: var(--spe-navy);
    font-family: 'Poppins', sans-serif;
    font-size: 15px;
  }
  #sidebar .brand .name { font-weight: 600; font-size: 15px; color: #fff; line-height: 1.15; }
  #sidebar .brand .sub { font-size: 11px; color: #96a8c4; }

  #sidebar .nav-group-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: #6f84a8;
    padding: 16px 18px 6px;
  }

  #sidebar .nav-link {
    color: #c4d1e6;
    padding: 10px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13.5px;
    font-weight: 500;
    border-left: 3px solid transparent;
    cursor: pointer;
  }
  #sidebar .nav-link i { font-size: 16px; width: 18px; text-align: center; }
  #sidebar .nav-link:hover { background: rgba(255,255,255,.05); color: #fff; }
  #sidebar .nav-link.active {
    color: #fff;
    background: rgba(31,169,113,.14);
    border-left-color: var(--spe-green);
  }

  #sidebar .sidebar-footer {
    margin-top: auto;
    padding: 14px 18px;
    font-size: 11px;
    color: #6f84a8;
    border-top: 1px solid rgba(255,255,255,.08);
  }

  /* ===== Main column ===== */
  #main-col {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
  }

  /* ===== Topbar ===== */
  #topbar {
    height: 60px;
    background: var(--spe-white);
    border-bottom: 1px solid var(--spe-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 22px;
    position: sticky;
    top: 0;
    z-index: 1020;
  }
  #topbar .page-title { font-weight: 600; font-size: 16px; color: var(--spe-navy); }
  #topbar .user-chip {
    display: flex; align-items: center; gap: 10px;
    font-size: 13px;
  }
  #topbar .user-chip .avatar {
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--spe-navy); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 600; font-size: 12px;
  }
  #menu-toggle { display: none; }

  /* ===== Content ===== */
  #content-area { padding: 22px; flex: 1; }
  .page-section { display: none; }
  .page-section.active { display: block; }

  /* ===== Cards ===== */
  .spe-card {
    background: var(--spe-white);
    border: 1px solid var(--spe-border);
    border-radius: 12px;
    padding: 18px;
  }
  .spe-card-title {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 14.5px;
    color: var(--spe-navy);
    margin-bottom: 14px;
  }

  /* ===== Stat cards ===== */
  .stat-card {
    background: var(--spe-white);
    border: 1px solid var(--spe-border);
    border-left: 4px solid var(--spe-green);
    border-radius: 10px;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    height: 100%;
  }
  .stat-card .icon {
    width: 40px; height: 40px; border-radius: 9px;
    background: rgba(11,37,69,.06);
    color: var(--spe-navy);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
  }
  .stat-card .num { font-size: 22px; font-weight: 700; color: var(--spe-navy); font-family: 'Poppins', sans-serif; line-height: 1; }
  .stat-card .label { font-size: 11.5px; color: var(--spe-muted); text-transform: uppercase; letter-spacing: .04em; margin-top: 3px; }

  /* ===== Buttons ===== */
  .btn-spe-primary {
    background: var(--spe-green);
    border-color: var(--spe-green);
    color: #fff;
    font-weight: 500;
  }
  .btn-spe-primary:hover { background: var(--spe-green-dark); border-color: var(--spe-green-dark); color: #fff; }
  .btn-spe-navy {
    background: var(--spe-navy);
    border-color: var(--spe-navy);
    color: #fff;
    font-weight: 500;
  }
  .btn-spe-navy:hover { background: var(--spe-navy-dark); border-color: var(--spe-navy-dark); color: #fff; }

  /* ===== Table ===== */
  .table-spe thead th {
    background: #F7F9FC;
    color: var(--spe-navy);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .03em;
    font-weight: 600;
    border-bottom: 1px solid var(--spe-border);
  }
  .table-spe td, .table-spe th { vertical-align: middle; padding: 10px 12px; }
  .badge-active { background: rgba(31,169,113,.12); color: var(--spe-green-dark); font-weight: 600; }
  .badge-inactive { background: rgba(107,122,144,.12); color: var(--spe-muted); font-weight: 600; }

  .form-label { font-size: 12.5px; font-weight: 600; color: var(--spe-navy); }
  .form-control, .form-select {
    border-color: var(--spe-border);
    font-size: 13.5px;
  }
  .form-control:focus, .form-select:focus {
    border-color: var(--spe-green);
    box-shadow: 0 0 0 .2rem rgba(31,169,113,.15);
  }

  /* ===== Loader ===== */
  #global-loader {
    position: fixed; inset: 0; background: rgba(11,37,69,.35);
    display: none; align-items: center; justify-content: center; z-index: 2000;
  }
  #global-loader.show { display: flex; }

  /* ===== Responsive ===== */
  @media (max-width: 900px) {
    #sidebar { transform: translateX(-100%); }
    #sidebar.open { transform: translateX(0); }
    #main-col { margin-left: 0; }
    #menu-toggle { display: inline-flex; }
  }