:root {
    --primary-500: #3B82F6;
    --primary-600: #2563EB;
    --primary-700: #1D4ED8;
    --sidebar-w: 250px;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-500: #6B7280;
    --gray-700: #374151;
    --gray-900: #111827;
}

* { box-sizing: border-box; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    margin: 0;
}

.btn-primary {
    background: var(--primary-600);
    border-color: var(--primary-600);
}
.btn-primary:hover { background: var(--primary-700); border-color: var(--primary-700); }

/* ----- LAYOUT ----- */
.main-wrapper { min-height: 100vh; }
.main-sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: var(--sidebar-w); background: #fff;
    border-right: 1px solid var(--gray-200);
    overflow-y: auto; z-index: 1030;
}
.sidebar-brand {
    padding: 1.25rem 1.25rem; border-bottom: 1px solid var(--gray-100);
    display: flex; align-items: center; gap: .6rem;
}
.sidebar-brand a { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--primary-700); }
.sidebar-brand img { height: 32px; }
.sidebar-brand .logo-name { font-weight: 700; font-size: 1.05rem; }

.sidebar-menu { list-style: none; padding: .75rem; margin: 0; }
.sidebar-menu .menu-header {
    font-size: .72rem; text-transform: uppercase; letter-spacing: .08em;
    color: var(--gray-500); padding: 1rem .75rem .35rem; font-weight: 600;
}
.sidebar-menu li a {
    display: flex; align-items: center; gap: .65rem;
    padding: .55rem .75rem; border-radius: .5rem;
    color: var(--gray-700); text-decoration: none; font-size: .92rem;
}
.sidebar-menu li a i { width: 18px; text-align: center; color: var(--gray-500); }
.sidebar-menu li a:hover { background: var(--gray-100); }
.sidebar-menu li.active a { background: #EFF6FF; color: var(--primary-700); }
.sidebar-menu li.active a i { color: var(--primary-600); }

.navbar-top {
    margin-left: var(--sidebar-w);
    height: 60px; background: #fff; border-bottom: 1px solid var(--gray-200);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 1.5rem; position: sticky; top: 0; z-index: 1020;
}
.navbar-top .nav-title { font-weight: 600; color: var(--gray-700); }
.navbar-top .user-dropdown { position: relative; }
.navbar-top .user-btn {
    display: flex; align-items: center; gap: .55rem;
    background: none; border: 0; cursor: pointer; padding: .35rem .6rem; border-radius: .5rem;
}
.navbar-top .user-btn:hover { background: var(--gray-100); }
.navbar-top .user-btn .avatar {
    width: 32px; height: 32px; border-radius: 50%; background: var(--primary-600);
    color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: .85rem;
}

.main-content {
    margin-left: var(--sidebar-w);
    padding: 1.5rem;
}

.main-footer {
    margin-left: var(--sidebar-w);
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    color: var(--gray-500); font-size: .85rem;
    display: flex; justify-content: space-between;
}

.hamburger { display: none; background: none; border: 0; font-size: 1.25rem; color: var(--gray-700); }

@media (max-width: 992px) {
    .main-sidebar { transform: translateX(-100%); transition: transform .2s; }
    .main-sidebar.open { transform: translateX(0); }
    .navbar-top, .main-content, .main-footer { margin-left: 0; }
    .hamburger { display: inline-block; }
}

/* ----- SEMANTIC COLOR PAIRS ----- */
.bg-primary-100 { background: #DBEAFE; } .text-primary-600 { color: #2563EB; }
.bg-success-100 { background: #D1FAE5; } .text-success-600 { color: #059669; }
.bg-warning-100 { background: #FEF3C7; } .text-warning-600 { color: #D97706; }
.bg-danger-100  { background: #FEE2E2; } .text-danger-600  { color: #DC2626; }
.bg-info-100    { background: #E0F2FE; } .text-info-600    { color: #0284C7; }

/* ----- CARD ----- */
.card-clean {
    background: #fff; border-radius: 12px; border: 1px solid var(--gray-100);
    box-shadow: 0 1px 2px rgba(0,0,0,.04); padding: 1.25rem;
}