:root {
    --primary-color: #2E8B57; /* Sea Green */
    --primary-hover: #236B43;
    --secondary-color: #F0F8FF; /* Alice Blue */
    --accent-color: #FF8C00; /* Dark Orange for alerts/returns */
    --text-main: #333333;
    --text-muted: #6c757d;
    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --border-radius: 12px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    padding-bottom: 80px; /* Space for bottom nav if added later */
}

/* Navbar */
.navbar {
    background-color: var(--primary-color) !important;
    box-shadow: var(--shadow-md);
}
.navbar-brand {
    font-weight: 700;
    color: white !important;
}
.navbar-brand i {
    margin-right: 8px;
}

/* Typography & Layout */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
}
.page-title {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
    color: var(--text-main);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-bottom: 1rem;
    background-color: var(--card-bg);
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: 8px;
    font-weight: 500;
    padding: 10px 20px;
    transition: all 0.2s;
}
.btn-primary:hover, .btn-primary:focus {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 0 0 0.25rem rgba(46, 139, 87, 0.25);
}
.btn-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 12px rgba(46, 139, 87, 0.3);
    z-index: 1000;
}

/* Forms */
.form-control {
    border-radius: 8px;
    padding: 12px;
    border: 1px solid #ced4da;
}
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(46, 139, 87, 0.25);
}

/* Lists */
.list-group-item {
    border: none;
    border-bottom: 1px solid #eee;
    padding: 1rem;
}
.list-group-item:last-child {
    border-bottom: none;
}

/* Badges */
.badge-return {
    background-color: var(--accent-color);
    color: white;
}

/* Utilities */
.text-primary-custom {
    color: var(--primary-color);
}