:root {
    --primary: #0f172a;
    --primary-light: #334155;
    --accent: #2563eb;
    --bg-body: #f1f5f9;
    --border-color: #cbd5e1;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --white: #ffffff;
    --max-app-width: 1100px; /* <--- CONTROLS THE WIDTH */
}

body {
    background-color: var(--bg-body);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-main);
}

/* Custom Container to fix "Too Wide" issue */
.app-container {
    max-width: var(--max-app-width);
    margin: 0 auto; /* Center it */
    padding-left: 20px;
    padding-right: 20px;
}

/* Navbar */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.navbar-brand {
    font-weight: 700;
    color: var(--primary) !important;
    font-size: 1.25rem;
}

/* Card & Tables */
.card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    background: var(--white);
    margin-bottom: 1.5rem;
}
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.table {
    margin-bottom: 0;
    font-size: 0.95rem;
}
.table th {
    background-color: #f8fafc;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}
.table td {
    vertical-align: middle;
}

/* Tracking Input - Hero Style */
.scan-hero {
    border: 2px solid var(--border-color);
    font-size: 1.5rem;
    padding: 1rem;
    font-family: 'Roboto Mono', monospace;
    transition: all 0.2s;
}
.scan-hero:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* Scrolling List for Items */
.scroll-area {
    height: 500px; 
    overflow-y: auto;
    border-top: 1px solid var(--border-color);
}

.item-row {
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.item-row:nth-child(even) { background-color: #f8fafc; }
.item-row:hover { background-color: #eef2ff; }

.mono { font-family: 'Roboto Mono', monospace; }

/* Status Labels */
.status-pill {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}
.status-pending { background: #fff7ed; color: #ea580c; border: 1px solid #ffedd5; }
.status-saved { background: #f0fdf4; color: #16a34a; border: 1px solid #dcfce7; }

/* Utilities */
.btn-primary { background-color: var(--accent); border-color: var(--accent); }
.text-label { font-size: 0.75rem; text-transform: uppercase; color: var(--text-muted); font-weight: 600; }