* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(180deg, #f4f7fb 0%, #eef3f8 100%);
    color: #1d2a39;
}

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-card,
.card {
    background: #ffffff;
    border: 1px solid #dbe5ef;
    border-radius: 16px;
    box-shadow: 0 18px 40px rgba(31, 55, 86, 0.08);
}

.auth-card {
    width: min(520px, 100%);
    padding: 28px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 24px;
}

.page-header h1,
.auth-card h1,
.card h2 {
    margin-top: 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    padding: 0 24px 24px;
}

.card {
    padding: 24px;
}

.table-card {
    margin: 0 24px 24px;
}

.stack {
    display: grid;
    gap: 14px;
}

.row {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.check-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

label span {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #526273;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="file"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #c8d5e2;
    border-radius: 10px;
    background: #fbfdff;
    font-size: 14px;
}

button,
.logout {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    border: 0;
    border-radius: 10px;
    background: #0d6efd;
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
}

button.danger {
    background: #d9534f;
}

.muted,
.message {
    color: #647587;
}

.tip-box {
    margin-top: 20px;
    padding: 16px;
    border-radius: 12px;
    background: #f6f9fc;
}

.tip-box pre {
    margin: 0;
    white-space: pre-wrap;
}

.flash {
    margin: 0 24px 24px;
    padding: 14px 16px;
    border-radius: 12px;
}

.flash.success {
    background: #eaf8ee;
    color: #1b6f36;
}

.flash.error {
    background: #fff1f1;
    color: #a23434;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 12px;
    border-bottom: 1px solid #e7edf4;
    text-align: left;
    vertical-align: top;
}

code {
    padding: 2px 6px;
    border-radius: 6px;
    background: #f2f6fb;
}

@media (max-width: 640px) {
    .row {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}