:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

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

.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    padding: 2rem 0;
    border-right: 1px solid var(--glass-border);
}

.logo {
    padding: 0 2rem;
    margin-bottom: 2rem;
}

.nav li {
    padding: 1rem 2rem;
    list-style: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.nav li:hover, .nav li.active {
    color: var(--text-primary);
    background-color: var(--glass-bg);
    border-left: 4px solid var(--accent);
}

.main-content {
    flex: 1;
    padding: 2rem 3rem;
    overflow-y: auto;
}

.hidden {
    display: none !important;
}

header {
    margin-bottom: 2rem;
}

header p {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 0.5rem;
}

.value.success { color: var(--success); }
.value.danger { color: var(--danger); }
.value.warning { color: var(--warning); }

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

th {
    color: var(--text-secondary);
    font-weight: 500;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-Pending { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.status-In-Transit { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.status-Delivered { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.status-Failed-Return-Pending { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.status-Returned-to-Stock { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.status-Lost-Delayed { background: rgba(239, 68, 68, 0.2); color: #f87171; }

.scanner-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

#barcode-input {
    width: 100%;
    padding: 1rem;
    font-size: 1.25rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: white;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s;
}

#barcode-input:focus {
    border-color: var(--accent);
}

.message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    font-weight: 500;
}

.message.success {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.message.error {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}