:root {
    --primary-color: #00ff9d;
    --primary-glow: rgba(0, 255, 157, 0.4);
    --bg-color: #0a0a0a;
    --card-bg: #121212;
    --sidebar-bg: rgba(18, 18, 18, 0.95);
    --text-color: #e0e0e0;
    --text-muted: #888;
    --border-color: #333;
    --hover-bg: #1a1a1a;
    --error-color: #ff3e3e;
    --success-color: #00ff9d;
    --sidebar-width: 260px;
    --transition: all 0.3s ease;
}

[data-theme="light"] {
    --primary-color: #00b36b;
    --primary-glow: rgba(0, 179, 107, 0.2);
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --sidebar-bg: rgba(255, 255, 255, 0.95);
    --text-color: #333;
    --text-muted: #666;
    --border-color: #ddd;
    --hover-bg: #f0f0f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: var(--transition);
    overflow-x: hidden;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    height: 100vh;
    position: fixed;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar-header {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--primary-glow);
}

.nav-links {
    flex: 1;
    padding: 0 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 5px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background: var(--hover-bg);
    color: var(--primary-color);
    box-shadow: inset 3px 0 0 var(--primary-color);
}

.nav-link i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    transition: var(--transition);
}

/* Header/Top Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.top-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    transform: translateY(-5px);
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 10px 0;
}

.stat-card .label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary-color);
    color: #000;
}

.btn-primary:hover {
    box-shadow: 0 0 15px var(--primary-glow);
    transform: scale(1.02);
}

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

/* FAB */
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px var(--primary-glow);
    cursor: pointer;
    z-index: 999;
    border: none;
    transition: var(--transition);
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
}

input, select, textarea {
    width: 100%;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: 8px;
    color: var(--text-color);
    transition: var(--transition);
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 8px var(--primary-glow);
}

/* Tables */
.table-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 1.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: var(--hover-bg);
    padding: 1rem;
    text-align: left;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
}

td {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        left: -100%;
    }

    .sidebar.active {
        left: 0;
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
    }

    .table-container {
        border: none;
        background: transparent;
    }

    /* Card design for mobile users */
    .user-table-mobile {
        display: block;
    }

    table.desktop-table {
        display: none;
    }
    
    .mobile-card {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 12px;
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .mobile-card-header {
        display: flex;
        justify-content: space-between;
        margin-bottom: 10px;
    }
}

@media (min-width: 769px) {
    .menu-toggle {
        display: none;
    }
}

/* Utilities */
.status-pill {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-active { background: rgba(0, 255, 157, 0.1); color: #00ff9d; }
.status-inactive { background: rgba(255, 62, 62, 0.1); color: #ff3e3e; }
.status-expired { background: rgba(136, 136, 136, 0.1); color: #888; }