:root{
  --primary:#1f4e79;
  --accent:#2d8cff;
  --danger:#dc3545;
  --dark:#212529;
  --light:#ffffff;
  --border:#e5e7eb;
}

body{
  margin:0;
  font-family:Arial,sans-serif;
  background:#f6f7f9;
  color:#222;
}

.site-header{
  background:var(--primary) !important;
  border-bottom:1px solid var(--border);
  padding:16px 28px;
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.site-title{
  font-size:1.4rem;
  font-weight:700;
}

.site-main{
  max-width:1280px;
  margin:40px auto;
  padding:32px;
  background:#fff;
  border-radius:10px;
}

.site-footer{
  margin-top:60px;
  background:#222;
  color:#fff;
  padding:30px;
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:0;
  border-radius:6px;
  cursor:pointer;
  padding:10px 18px;
  font-size:.95rem;
  text-decoration:none;
}

.btn-primary{
  background:var(--primary);
  color:#fff;
}

.btn-danger{
  background:var(--danger);
  color:#fff;
}

.login-dropdown{
  position:relative;
}

.dropdown-panel{
  position:absolute;
  right:0;
  top:100%;
  width:320px;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:0 20px 50px rgba(0,0,0,.15);
  border-radius:8px;
  padding:20px;
  margin-top:10px;
  display:none;
}

.login-dropdown.open .dropdown-panel{
  display:block;
}

.form-group{
  margin-bottom:14px;
}

.form-group label{
  display:block;
  margin-bottom:6px;
  font-size:.9rem;
}

.form-control{
  width:100%;
  box-sizing:border-box;
  padding:10px;
  border:1px solid #d0d7de;
  border-radius:6px;
}

.form-submit{
  width:100%;
}

.forgot-link{
  display:block;
  margin-top:14px;
  text-align:center;
  font-size:.85rem;
}

.alert{
  padding:14px 18px;
  border-radius:8px;
  margin-bottom:20px;
}

.alert-danger{
  background:#fff1f2;
  color:#991b1b;
}

.alert-success{
  background:#ecfdf5;
  color:#166534;
}

.layout{
    display:grid;
    grid-template-columns:260px 1fr 320px;
    gap:20px;
    width:100%;
    max-width:100%;
    margin:20px auto;
    padding:0 20px;
    box-sizing:border-box;
    transition:all .3s ease;
}

.layout.left-collapsed{
    grid-template-columns:0 1fr 320px;
}

.layout.right-collapsed{
    grid-template-columns:260px 1fr 0;
}

.layout.left-collapsed.right-collapsed{
    grid-template-columns:0 1fr 0;
}

.sidebar{
    overflow:hidden;
    background:#fff;
    border-radius:10px;
    padding:20px;
    box-shadow:0 2px 10px rgba(0,0,0,.05);
    transition:all .3s ease;
}

.layout.left-collapsed #nav-sidebar{
    width:0;
    padding:0;
    border:none;
    box-shadow:none;
}

.layout.right-collapsed #form-sidebar{
    width:0;
    padding:0;
    border:none;
    box-shadow:none;
}

.content{
    background:#fff;
    border-radius:10px;
    padding:30px;
    min-height:700px;
    width:100%;
    box-sizing:border-box;
}

.site-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:15px 25px;
    background:#fff;
    border-bottom:1px solid #ddd;
}

.sidebar-toggle{
    border:none;
    background:#1f4e79;
    color:#fff;
    padding:10px 14px;
    border-radius:6px;
    cursor:pointer;
}

.submenu-content{
    display:none;
}

.submenu.open .submenu-content{
    display:block;
}

@media (max-width:1100px){

    .layout{
        display:block;
    }

    .sidebar{
        margin-bottom:20px;
    }

    .layout.left-collapsed #nav-sidebar,
    .layout.right-collapsed #form-sidebar{
        display:none;
    }
}