:root {
    --green: #1f9d55;
    --blue: #00adef;
    --yellow: #fcd116;
    --dark: #080c14;
    --dark-surface: #111827;
    --dark-elevated: #1f2937;
    --border: #374151;
    --text: #f3f4f6;
    --text-muted: #9ca3af;
    --sidebar-width: 260px;
    --header-height: 70px;
}

body {
    background-color: var(--dark);
    color: var(--text);
    font-family: 'Plus Jakarta Sans', sans-serif;
    margin: 0;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--dark-surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Admin Wrapper Layouts */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
    transition: all 0.3s ease;
}

/* Sidebar Core */
.admin-sidebar {
    background: var(--dark-surface);
    border-right: 1px solid var(--border);
    width: var(--sidebar-width);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    z-index: 1000;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border);
    font-weight: 800;
    font-size: 1.25rem;
    color: #fff;
}

.sidebar-header span {
    background: linear-gradient(90deg, var(--green), var(--blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-nav {
    padding: 1rem 0;
    flex: 1;
    overflow-y: auto;
}

.nav-menu-label {
    padding: 0.75rem 1.5rem 0.25rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 700;
}

.nav-item {
    list-style: none;
    margin-bottom: 0.25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.6rem 1.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
    background: rgba(31, 157, 85, 0.1);
    color: #fff;
    border-left-color: var(--green);
}

.nav-link i {
    width: 24px;
    font-size: 1.1rem;
    margin-right: 0.75rem;
    color: var(--blue);
}

/* Main Content Area */
.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.admin-header {
    height: var(--header-height);
    background: var(--dark-surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 999;
}

.admin-content {
    padding: 1.5rem;
    flex: 1;
}

/* 
 * Layout Variations (Left, Right, Top) 
 * Toggled via JS adding classes to .admin-wrapper
 */

/* Default is layout-left */
.layout-left .admin-sidebar { order: 1; }
.layout-left .admin-main { order: 2; }

/* Right Sidebar */
.layout-right .admin-sidebar { 
    order: 2; 
    border-right: none; 
    border-left: 1px solid var(--border); 
}
.layout-right .admin-main { order: 1; }

/* Top Navbar (Horizontal Mode) */
.layout-top {
    flex-direction: column;
}
.layout-top .admin-sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex-direction: row;
    align-items: center;
}
.layout-top .sidebar-nav {
    display: flex;
    padding: 0;
    overflow-x: auto;
    overflow-y: hidden;
}
.layout-top .nav-menu-label { display: none; } /* Hide group headings in top mode */
.layout-top .nav-item { margin: 0; }
.layout-top .nav-link { 
    border-left: none; 
    border-bottom: 3px solid transparent;
    padding: 1.25rem 1rem;
}
.layout-top .nav-link:hover, .layout-top .nav-link.active {
    border-bottom-color: var(--green);
}

/* Cards & Utilities */
.card-dark {
    background: var(--dark-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    color: var(--text);
}
.card-dark .text-muted {
    color: var(--text-muted) !important;
}
.card-dark h1, .card-dark h2, .card-dark h3, .card-dark h4, .card-dark h5, .card-dark h6 {
    color: #fff;
}
.card-dark .card-header {
    border-bottom: 1px solid var(--border);
    background: transparent;
    font-weight: 600;
    color: #fff;
}
.form-control, .form-select {
    background-color: var(--dark-elevated);
    border: 1px solid var(--border);
    color: var(--text);
}
.form-control:focus, .form-select:focus {
    background-color: var(--dark-elevated);
    border-color: var(--blue);
    color: #fff;
    box-shadow: 0 0 0 0.25rem rgba(0, 173, 239, 0.25);
}
.btn-smfu {
    background: linear-gradient(90deg, var(--green), var(--blue));
    color: #fff;
    border: none;
    font-weight: 600;
}
.btn-smfu:hover {
    opacity: 0.9;
    color: #fff;
}