:root {
    --primary-green: #2e7d32;
    --light-green: #e8f5e9;
    --dark-green: #1b5e20;
    --accent-gold: #ffd700;
}

body {
    background-color: #f4f7f6;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar-custom {
    background-color: var(--primary-green);
    color: white;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card {
    border: none;
    border-radius: 12px;
    transition: transform 0.2s;
}

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

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

.badge-balance {
    background-color: var(--light-green);
    color: var(--primary-green);
    font-weight: bold;
    border: 1px solid var(--primary-green);
}

.table thead {
    background-color: var(--primary-green);
    color: white;
}

.sms-box {
    background: #fff;
    border: 2px dashed var(--primary-green);
    padding: 15px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.2rem;
    color: var(--dark-green);
}