:root{
  --primary:#4A90E2;
  --primary-light:#E3F2FD;
  --primary-dark:#2E6DB4;
  --white:#FFFFFF;
  --bg:#F5FAFF;
  --text:#2C3E50;
  --muted:#7A8BA0;
  --border:#E1ECF7;
  --sidebar-w:260px;
  --sidebar-cw:83px;
  --shadow:0 2px 8px rgba(74,144,226,.08);
}

*{box-sizing:border-box}
html,body{height:100%}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--text);background:var(--bg);margin:0}
a{color:var(--primary)}
.text-muted{color:var(--muted)!important}

/* ---------- LOGIN ---------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:linear-gradient(135deg,#E3F2FD 0%,#F5FAFF 100%);}
.login-wrapper{width:100%;max-width:400px;padding:20px}
.login-card{background:#fff;padding:38px 32px;border-radius:16px;box-shadow:0 8px 30px rgba(74,144,226,.15);text-align:center}
.login-logo{font-size:2.6rem;color:var(--primary);margin-bottom:8px}
.login-title{font-size:1.6rem;font-weight:700;margin:0}
.login-subtitle{color:var(--muted);font-size:.9rem;margin-bottom:24px}
.login-card .form-control{border-radius:10px;padding:11px 14px;border-color:var(--border)}
.login-card .form-control:focus{border-color:var(--primary);box-shadow:0 0 0 .2rem rgba(74,144,226,.2)}
.login-card .btn-primary{background:var(--primary);border-color:var(--primary);border-radius:10px}

/* ---------- APP LAYOUT ---------- */
.app-body{background:var(--bg);min-height:100vh}
.app-main{margin-left:var(--sidebar-w);min-height:100vh;transition:margin-left .3s ease;display:flex;flex-direction:column}
.sidebar.collapsed ~ .app-main{margin-left:var(--sidebar-cw)}
.app-navbar{background:#fff;height:64px;display:flex;align-items:center;gap:14px;padding:0 22px;
  border-bottom:1px solid var(--border);position:sticky;top:0;z-index:900}
.navbar-title{font-weight:600;color:var(--primary-dark);flex:1}
.navbar-user{display:flex;align-items:center;gap:8px;color:var(--text);font-size:.92rem}
.navbar-user i{font-size:1.5rem;color:var(--primary)}
.navbar-burger{display:none;background:none;border:none;font-size:1.5rem;color:var(--primary);padding:0}
.app-content{padding:26px;flex:1}

/* ---------- SIDEBAR ---------- */
.sidebar{position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;background:#fff;
  border-right:1px solid var(--border);display:flex;flex-direction:column;
  transition:width .3s ease;z-index:1000;overflow:visible}
.sidebar.collapsed{width:var(--sidebar-cw)}
.sidebar-brand{display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;border-bottom:1px solid var(--border);min-height:64px}
.sidebar-logo{display:flex;align-items:center;gap:10px;color:var(--primary);
  font-weight:700;font-size:1.1rem;text-decoration:none}
.sidebar-logo:hover{color:var(--primary-dark)}
.sidebar-logo i{font-size:1.6rem}
.sidebar-text{white-space:nowrap;transition:opacity .2s}
.sidebar.collapsed .sidebar-text{opacity:0;width:0;display:none}
.sidebar-toggle{background:none;border:none;color:var(--primary);font-size:1.4rem;
  padding:4px 8px;border-radius:6px;cursor:pointer;transition:background .2s}
.sidebar-toggle:hover{background:var(--primary-light)}

.sidebar-nav{flex:1;overflow-y:auto;overflow-x:hidden;padding:10px 0}
.sidebar.collapsed .sidebar-nav{overflow:visible}
.nav-menu{list-style:none;padding:0;margin:0}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:12px;padding:12px 20px;
  color:var(--text);text-decoration:none;white-space:nowrap;transition:.2s;font-size:.95rem}
.nav-link:hover{background:var(--primary-light);color:var(--primary-dark)}
.nav-link.active{background:var(--primary-light);color:var(--primary-dark);
  border-left:3px solid var(--primary);font-weight:600}
.nav-link i{font-size:1.2rem;min-width:24px;text-align:center}
.nav-text{flex:1;transition:opacity .2s}
.sidebar.collapsed .nav-text{opacity:0;width:0;display:none}
.nav-arrow{font-size:.85rem!important;min-width:0!important;transition:transform .25s}
.nav-item.open>.nav-link .nav-arrow{transform:rotate(180deg)}

/* Expanded submenu */
.submenu{list-style:none;padding:0;margin:0;background:#F8FBFE;
  max-height:0;overflow:hidden;transition:max-height .3s ease}
.nav-item.open>.submenu{max-height:500px}
.submenu li a{display:block;padding:9px 20px 9px 56px;font-size:.88rem;
  color:var(--muted);text-decoration:none;transition:.15s}
.submenu li a:hover{color:var(--primary);background:var(--primary-light)}

/* Collapsed floating submenu (via JS) */
.sidebar.collapsed .nav-item.has-submenu>.submenu{background:#fff;border:1px solid var(--border);
  border-radius:10px;box-shadow:0 8px 24px rgba(74,144,226,.18);padding:8px 0;
  display:none;max-height:none;overflow:visible;min-width:210px}
.sidebar.collapsed .nav-item.has-submenu>.submenu.floating-show{display:block}
.sidebar.collapsed .submenu li a{padding:10px 18px}

.sidebar-footer{border-top:1px solid var(--border);padding:8px 0}
.logout-link{color:#e74c3c!important}
.logout-link:hover{background:#FDEDEC!important;color:#c0392b!important}

/* ---------- DASHBOARD ---------- */
.page-title{font-size:1.55rem;font-weight:700;margin:0 0 6px}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:12px;
  padding:18px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow);
  transition:transform .15s,box-shadow .15s}
.stat-card:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(74,144,226,.15)}
.stat-icon{width:48px;height:48px;border-radius:12px;background:var(--primary-light);
  color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:1.4rem}
.stat-value{font-size:1.5rem;font-weight:700;color:var(--primary-dark);line-height:1}
.stat-label{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}

/* ---------- OVERLAY (mobile) ---------- */
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(30,60,90,.35);z-index:999}
.sidebar-overlay.show{display:block}

/* ---------- RESPONSIVE ---------- */
@media (max-width:991.98px){
  .sidebar{width:var(--sidebar-w);transform:translateX(-100%);transition:transform .3s ease}
  .sidebar.mobile-open{transform:translateX(0)}
  .sidebar.collapsed{width:var(--sidebar-w);transform:translateX(-100%)}
  .sidebar.collapsed.mobile-open{transform:translateX(0)}
  .sidebar.collapsed .sidebar-text,
  .sidebar.collapsed .nav-text{display:inline;opacity:1;width:auto}
  .sidebar.collapsed .submenu{position:static;display:none;box-shadow:none;border:0;min-width:0;
    padding:0;background:#F8FBFE}
  .sidebar.collapsed .submenu.floating-show{display:block}
  .sidebar.collapsed .nav-item.open>.submenu{display:block;max-height:500px}
  .app-main{margin-left:0!important}
  .navbar-burger{display:block}
  .app-content{padding:18px}
}


.modal-backdrop {
    z-index: 1050 !important;
}
.modal {
    z-index: 1055 !important;
}