* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: #1B1B1F;
    color: #DDDDDD;
}
a { color: #D4AF37; text-decoration: none; }

.app-shell { min-height: 100vh; }
.app-main { max-width: 900px; margin: 0 auto; padding: 24px; }

.topnav {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px 24px;
    background: #25252B;
    border-bottom: 1px solid #333;
    flex-wrap: wrap;
}
.topnav .brand { font-weight: bold; color: #D4AF37; font-size: 18px; letter-spacing: 1px; }
.topnav a { color: #DDD; font-size: 14px; }
.topnav a:hover { color: #D4AF37; }
.topnav .spacer { flex: 1; }
.topnav .user-email { font-size: 13px; color: #999; }
.logout-btn {
    background: #3A3A42; color: white; border: none; padding: 8px 14px;
    border-radius: 6px; cursor: pointer; font-size: 13px;
}

.page-title { color: #D4AF37; font-size: 26px; margin-bottom: 20px; }

.card {
    background: #25252B;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}
.card h3 { margin-top: 0; color: #DDD; }

label { display: block; font-size: 12px; color: #AAA; margin: 10px 0 4px; }
input, select {
    width: 100%;
    height: 38px;
    padding: 6px 10px;
    border-radius: 4px;
    border: 1px solid #444;
    background: #1B1B1F;
    color: #EEE;
    font-size: 15px;
}

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 500px) { .two-col { grid-template-columns: 1fr; } }

.button-row { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }

.primary-btn, .primary-btn-link {
    background: #D4AF37; color: #1B1B1F; border: none; font-weight: bold;
    padding: 12px 20px; border-radius: 6px; cursor: pointer; font-size: 15px;
    display: inline-block; text-align: center;
}
.secondary-btn, .secondary-btn-link {
    background: #3A3A42; color: white; border: none;
    padding: 12px 20px; border-radius: 6px; cursor: pointer; font-size: 15px;
    display: inline-block; text-align: center;
}
.full-width { width: 100%; margin-top: 20px; }

.result-box { background: #1B1B1F; border-radius: 6px; padding: 16px; margin-top: 20px; }
.offer-line { color: #D4AF37; font-size: 20px; font-weight: bold; }
.profit-line { color: #7FBF7F; }

.status-text { margin-top: 10px; font-size: 13px; }
.status-text.success { color: #7FBF7F; }
.status-text.error { color: #E07A7A; }

.gold-text { color: #D4AF37; font-size: 15px; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td {
    text-align: left; padding: 10px; border-bottom: 1px solid #333; font-size: 14px;
}
.data-table th { color: #D4AF37; }
.link-btn {
    background: none; border: none; color: #E07A7A; cursor: pointer;
    font-size: 13px; text-decoration: underline; padding: 0;
}

.auth-page {
    min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px;
}
.auth-card {
    background: #25252B; border-radius: 10px; padding: 32px; max-width: 380px; width: 100%;
}
.brand-title { color: #D4AF37; font-size: 28px; font-weight: bold; margin: 0; text-align: center; }
.brand-sub { color: #AAA; font-size: 13px; text-align: center; margin: 6px 0 24px; }
.error-box {
    background: #3a1f1f; color: #E07A7A; padding: 10px 14px; border-radius: 6px;
    font-size: 13px; margin-bottom: 16px;
}
.auth-switch { text-align: center; font-size: 13px; color: #999; margin-top: 20px; }

.customer-display {
    min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
    background: #1B1B1F; text-align: center; padding: 20px;
}
.customer-display .item-desc { color: #AAA; font-size: 22px; margin: 10px 0 30px; }
.customer-display .offer-label { color: #DDD; font-size: 18px; }
.customer-display .offer-amount { color: #D4AF37; font-size: 72px; font-weight: bold; margin: 10px 0; }