:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-light: #f8fafc;
    --card-border: #e2e8f0;
    --text-main: #1e293b;
    --text-muted: #64748b;
}

body {
    background-color: var(--bg-light);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.navbar {
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
}

.card {
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.card.shadow-sm {
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1) !important;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: 500;
    padding: 0.625rem 1.25rem;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.form-control {
    border-color: var(--card-border);
    padding: 0.625rem 0.75rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.picked-qty-cell.mismatch {
    background-color: rgba(239, 68, 68, 0.1) !important;
    color: #dc2626;
    font-weight: 600;
}

#match-box.mismatch {
    background-color: rgba(239, 68, 68, 0.05) !important;
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 0.5rem;
    padding: 0.5rem;
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--primary-color) !important;
}

.table thead th {
    background-color: #f1f5f9;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 2px solid var(--card-border);
}

#loading-overlay {
    backdrop-filter: blur(4px);
}