* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #f5f5f5;
    color: #333;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Payment page */
.pay-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    padding: 32px;
    max-width: 400px;
    width: 90%;
    text-align: center;
}

.pay-container h2 {
    margin-bottom: 8px;
    color: #333;
}

.order-name {
    color: #888;
    margin-bottom: 16px;
    font-size: 14px;
}

.amount {
    margin: 16px 0;
}

.amount .currency {
    font-size: 24px;
    vertical-align: top;
}

.amount .value {
    font-size: 48px;
    font-weight: bold;
    color: #e74c3c;
}

.amount-hint {
    color: #e74c3c;
    font-size: 13px;
    margin-bottom: 20px;
}

.qr-wrapper {
    margin: 20px auto;
    padding: 12px;
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
    display: inline-block;
}

.qr-code {
    width: 240px;
    height: 240px;
    display: block;
}

.scan-hint {
    color: #666;
    font-size: 14px;
    margin: 12px 0 20px;
}

.actions {
    margin-top: 16px;
}

.btn {
    padding: 10px 32px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary {
    background: #39c5bb;
    color: #fff;
}

.btn-primary:hover {
    background: #32b0a8;
}

.btn-primary:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.status-msg {
    margin-top: 16px;
    font-size: 14px;
    color: #888;
}

.status-msg.success {
    color: #39c5bb;
    font-weight: bold;
}

.status-msg.error {
    color: #e74c3c;
}

.success-title {
    color: #39c5bb;
}

/* Admin styles */
.admin-container {
    max-width: 900px;
    width: 95%;
    margin: 20px auto;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    padding: 24px;
}

.admin-container h2 {
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 12px;
}

.login-form {
    max-width: 360px;
    margin: 0 auto;
}

.login-form label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
}

.login-form input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin-bottom: 12px;
    font-size: 14px;
}

.login-form .btn {
    width: 100%;
    margin-top: 8px;
}

.order-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.order-table th,
.order-table td {
    padding: 8px 12px;
    border-bottom: 1px solid #eee;
    text-align: left;
}

.order-table th {
    background: #f8f8f8;
    font-weight: 600;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    color: #fff;
}

.badge-pending { background: #f0ad4e; }
.badge-paid { background: #39c5bb; }
.badge-expired { background: #999; }
.badge-failed { background: #e74c3c; }
.badge-claimed { background: #3498db; }

.btn-confirm {
    background: #39c5bb;
    color: #fff;
    padding: 4px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}

.btn-reject {
    background: #e74c3c;
    color: #fff;
    padding: 4px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    margin-left: 4px;
}

.btn-logout {
    background: #999;
    color: #fff;
    padding: 6px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    float: right;
}

.error-msg {
    color: #e74c3c;
    margin-bottom: 12px;
}

.tab-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.tab-bar a {
    padding: 6px 16px;
    border-radius: 4px;
    text-decoration: none;
    color: #666;
    background: #f0f0f0;
    font-size: 14px;
}

.tab-bar a.active {
    background: #333;
    color: #fff;
}

/* Shop page */
.shop-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    padding: 32px;
    max-width: 500px;
    width: 90%;
    text-align: center;
}

.shop-container h2 {
    margin-bottom: 8px;
}

.shop-desc {
    color: #888;
    font-size: 14px;
    margin-bottom: 24px;
}

.shop-container h3 {
    text-align: left;
    font-size: 15px;
    margin-bottom: 12px;
    color: #555;
}

.amount-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 24px;
}

.tier-grid {
    grid-template-columns: repeat(3, 1fr);
}

.amount-card {
    cursor: pointer;
}

.amount-card input { display: none; }

.amount-label {
    display: block;
    padding: 14px 8px;
    border: 2px solid #eee;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.15s;
}

.tier-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 6px;
    font-size: 16px;
}

.tier-price {
    display: flex;
    align-items: center;
    gap: 4px;
}

.discount-tag {
    background: #39c5bb;
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 4px;
}

.tier-detail {
    font-size: 12px;
    font-weight: 400;
    color: #888;
}

.amount-card input:checked + .tier-label .tier-detail {
    color: #39c5bb;
}

.amount-card input:checked + .amount-label {
    border-color: #39c5bb;
    background: #e6f7f6;
    color: #39c5bb;
}

.pay-type-grid {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}

.pay-type-card {
    flex: 1;
    cursor: pointer;
}

.pay-type-card input { display: none; }

.pay-type-label {
    display: block;
    padding: 12px 8px;
    border: 2px solid #eee;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    transition: all 0.15s;
}

.pay-type-card input:checked + .pay-type-label {
    border-color: #39c5bb;
    background: #e6f7f6;
    color: #39c5bb;
}

.btn-buy {
    width: 100%;
    padding: 14px;
    font-size: 18px;
}

.pay-hint {
    background: #f9f9f9;
    border-left: 3px solid #39c5bb;
    padding: 12px 16px;
    margin-bottom: 20px;
    font-size: 13px;
    color: #666;
    text-align: left;
    line-height: 1.6;
}

.pay-hint a {
    color: #39c5bb;
}

.login-required {
    padding: 32px 0;
    color: #888;
    font-size: 16px;
}

.login-required .btn {
    display: inline-block;
    margin-top: 16px;
    text-decoration: none;
}

/* Redemption code display */
.code-section {
    margin-top: 16px;
}

.code-label {
    font-size: 16px;
    margin-bottom: 12px;
    color: #39c5bb;
    font-weight: 600;
}

.code-box {
    background: #f8f8f8;
    border: 2px dashed #39c5bb;
    border-radius: 8px;
    padding: 16px;
    font-size: 20px;
    font-family: monospace;
    letter-spacing: 1px;
    word-break: break-all;
    margin-bottom: 16px;
    user-select: all;
}

.code-hint {
    font-size: 13px;
    color: #888;
    margin-top: 16px;
}

.code-hint a {
    color: #39c5bb;
}

/* Shop header with navigation */
.shop-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.shop-header h2 {
    margin-bottom: 0;
}

.shop-nav {
    display: flex;
    gap: 12px;
    align-items: center;
    font-size: 14px;
}

.shop-nav a {
    color: #39c5bb;
    text-decoration: none;
}

.shop-nav a:hover {
    text-decoration: underline;
}

.nav-user {
    color: #333;
    font-weight: 500;
}

/* User login page */
.login-hint {
    color: #888;
    font-size: 14px;
    margin-bottom: 16px;
    text-align: center;
}

.login-footer {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    color: #888;
}

.login-footer a {
    color: #39c5bb;
    text-decoration: none;
}

/* Header actions (orders page) */
.header-actions {
    float: right;
    display: flex;
    gap: 8px;
}

.btn-nav {
    background: #39c5bb;
    color: #fff;
    padding: 6px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    text-decoration: none;
}

/* Code inline in order tables */
.code-inline {
    font-size: 11px;
    background: #f5f5f5;
    padding: 2px 4px;
    border-radius: 3px;
}

.btn-copy-small {
    background: #39c5bb;
    color: #fff;
    border: none;
    border-radius: 3px;
    padding: 2px 8px;
    font-size: 11px;
    cursor: pointer;
    margin-left: 4px;
}

.btn-link {
    color: #39c5bb;
    text-decoration: none;
    font-size: 13px;
}

.btn-link:hover {
    text-decoration: underline;
}