* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: #f4f7fe; color: #333; display: flex; flex-direction: column; min-height: 100vh; }
header { background: #0d253f; color: white; padding: 15px 20px; display: flex; justify-content: space-between; align-items: center; }
.logo-container { display: flex; align-items: center; gap: 10px; }
.logo-container img { height: 40px; width: 40px; border-radius: 8px; }
.logo-text { font-size: 20px; font-weight: bold; color: #00d2ff; }
nav a { color: white; text-decoration: none; margin-left: 15px; font-size: 14px; }
.container { max-width: 500px; margin: 30px auto; background: white; padding: 25px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); flex: 1; width: 90%; }
h2 { font-size: 18px; margin-bottom: 15px; color: #0d253f; }
.form-group { margin-bottom: 15px; }
label { display: block; font-size: 13px; margin-bottom: 5px; color: #666; }
input, select { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 6px; font-size: 15px; }
.discount-box { background: #e6f9f0; border: 1px dashed #00b074; color: #00875a; padding: 10px; border-radius: 6px; font-size: 14px; margin-bottom: 15px; }
button { width: 100%; background: #0052cc; color: white; border: none; padding: 14px; font-size: 16px; font-weight: bold; border-radius: 6px; cursor: pointer; }
button:hover { background: #0047b3; }
footer { background: #0d253f; color: #aaa; text-align: center; padding: 15px; font-size: 12px; margin-top: auto; }
footer a { color: #00d2ff; text-decoration: none; margin: 0 5px; }
/* Spinner Animation */
.spinner { width: 50px; height: 50px; border: 5px solid #f3f3f3; border-top: 5px solid #0052cc; border-radius: 50%; animation: spin 1s linear infinite; margin: 20px auto; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }