body {
    font-family: 'Sarabun', sans-serif;
    background-color: #f0fdf4;
    color: #333;
    margin: 0;
    padding: 20px;
    text-align: center;
}
.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
h1 { color: #166534; }
.btn {
    display: inline-block;
    padding: 15px 30px;
    font-size: 20px;
    color: white;
    background-color: #16a34a;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    margin: 5px;
}
.btn-next { background-color: #2563eb; }
.btn-complete { background-color: #dc2626; }
.queue-box {
    font-size: 80px;
    font-weight: bold;
    color: #15803d;
    margin: 20px 0;
    border: 3px dashed #86efac;
    padding: 20px;
}
.status-waiting { color: #ca8a04; }
.status-serving { color: #16a34a; animation: blink 1s infinite; }

@keyframes blink { 50% { opacity: 0.5; } }