:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --primary: #00e5ff;
    --secondary: #7000ff;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --danger: #ef4444;
    --success: #22c55e;
    --border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.sidebar h2 {
    color: var(--primary);
    text-align: center;
    margin-bottom: 40px;
    font-size: 20px;
    letter-spacing: 1px;
}

.sidebar a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 12px 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    transition: 0.3s;
    display: flex;
    align-items: center;
}

.sidebar a i {
    margin-left: 10px;
}

.sidebar a:hover, .sidebar a.active {
    background: rgba(0, 229, 255, 0.1);
    color: var(--primary);
}

.sidebar .logout {
    margin-top: auto;
    color: var(--danger);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--bg-card);
    padding: 25px;
    border-radius: 20px;
    border: 1px solid var(--border);
    text-align: center;
}

.stat-card h3 {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: bold;
    color: var(--primary);
}

/* Tables */
.card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 20px;
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th {
    text-align: right;
    color: var(--text-muted);
    padding: 15px;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 15px;
    border-bottom: 1px solid var(--border);
}

tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.badge {
    padding: 5px 10px;
    border-radius: 8px;
    font-size: 12px;
}

.badge-success { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: var(--danger); }

/* Buttons */
.btn {
    padding: 8px 15px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: 0.3s;
}

.btn-primary { background: var(--primary); color: #000; font-weight: bold; }
.btn-danger { background: var(--danger); color: #fff; }

.form-group {
    margin-bottom: 20px;
}

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

input, select {
    width: 100%;
    padding: 12px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: #fff;
}

.card-table {
    overflow-x: auto;
    width: 100%;
}

/* Custom scrollbar for better look */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}