* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f4f6f8;
    color: #1f2937;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

a {
    color: #2563eb;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.admin-wrap {
    min-height: 100vh;
}

.admin-header {
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
}

.admin-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.admin-header h1 {
    margin: 0;
    font-size: 20px;
}

.admin-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.admin-main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 38px;
    padding: 0 16px;
    border-radius: 8px;
    border: 1px solid transparent;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none !important;
}

.btn-primary {
    background: #2563eb;
    color: #fff;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-ghost {
    background: #fff;
    border-color: #d1d5db;
    color: #374151;
}

.btn-block {
    width: 100%;
}

.alert {
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-success {
    background: #ecfdf5;
    color: #047857;
}

.alert-error {
    background: #fef2f2;
    color: #b91c1c;
}

.table-card,
.form-card,
.qr-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 18px;
}

.table-scroll {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

.data-table th,
.data-table td {
    padding: 12px 10px;
    border-bottom: 1px solid #f1f5f9;
    text-align: left;
    font-size: 14px;
    vertical-align: middle;
}

.data-table th {
    color: #6b7280;
    font-weight: 600;
    background: #fafafa;
}

.mono {
    font-family: Consolas, Monaco, monospace;
}

.empty {
    text-align: center !important;
    color: #9ca3af;
    padding: 36px 10px !important;
}

.ops {
    white-space: nowrap;
}

.ops a {
    margin-right: 10px;
}

.ops a.danger {
    color: #dc2626;
}

.form-card label,
.login-card label {
    display: block;
    margin: 14px 0 6px;
    font-size: 14px;
    color: #4b5563;
}

.form-card input,
.login-card input,
.qr-url input {
    width: 100%;
    height: 42px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    padding: 0 12px;
    font-size: 14px;
    outline: none;
}

.form-card input:focus,
.login-card input:focus,
.qr-url input:focus {
    border-color: #2563eb;
}

.form-actions {
    margin-top: 22px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: #fff;
    border-radius: 14px;
    padding: 32px 28px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.login-card h1 {
    margin: 0;
    font-size: 22px;
    text-align: center;
}

.login-sub {
    text-align: center;
    color: #6b7280;
    margin: 8px 0 22px;
    font-size: 14px;
}

.login-card form label {
    margin-top: 18px;
}

.login-card form label:first-of-type {
    margin-top: 0;
}

.login-card form .btn-block {
    margin-top: 28px;
}

.qr-card {
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
}

.qr-meta {
    text-align: left;
    margin-bottom: 18px;
    font-size: 14px;
    line-height: 1.8;
}

.qr-box {
    display: inline-block;
    padding: 12px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #fff;
}

.qr-url-label {
    margin: 18px 0 8px;
    color: #6b7280;
    font-size: 13px;
}

.qr-url {
    display: flex;
    gap: 8px;
}

.hint {
    margin-top: 18px;
    text-align: left;
    color: #6b7280;
    font-size: 13px;
    line-height: 1.7;
}

.hint code {
    background: #f3f4f6;
    padding: 1px 5px;
    border-radius: 4px;
}

@media (max-width: 640px) {
    .admin-header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .qr-url {
        flex-direction: column;
    }
}