:root {
    color-scheme: light;
    --bg: #f4f7fb;
    --panel: #ffffff;
    --ink: #172033;
    --muted: #6b7280;
    --line: #dfe6ef;
    --primary: #1769e0;
    --primary-ink: #ffffff;
    --accent: #0f9f7a;
    --danger: #d93d3d;
    --warning: #b7791f;
    --shadow: 0 18px 45px rgba(23, 32, 51, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.login-page {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 28px;
    background:
        linear-gradient(135deg, rgba(23, 105, 224, 0.16), transparent 34%),
        linear-gradient(315deg, rgba(15, 159, 122, 0.14), transparent 32%),
        #f6f8fc;
}

.login-box {
    width: min(420px, 100%);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow);
    padding: 32px;
}

.login-box h1 {
    margin: 12px 0 8px;
    font-size: 30px;
}

.login-box p {
    margin: 0 0 28px;
    color: var(--muted);
}

.admin-shell {
    display: grid;
    min-height: 100vh;
    grid-template-columns: 260px 1fr;
}

.sidebar {
    position: sticky;
    top: 0;
    display: flex;
    height: 100vh;
    flex-direction: column;
    gap: 26px;
    padding: 24px;
    background: #101827;
    color: #dbe5f2;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-mark {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 8px;
    background: linear-gradient(135deg, #1769e0, #0f9f7a);
    color: #fff;
    font-weight: 800;
}

.brand strong {
    display: block;
    font-size: 18px;
}

.brand small,
.eyebrow {
    color: #92a1b8;
    font-size: 12px;
    letter-spacing: 0;
}

.nav {
    display: grid;
    gap: 8px;
}

.nav a,
.logout {
    border-radius: 8px;
    padding: 12px 14px;
    color: #c8d4e5;
}

.nav a:hover,
.nav a.active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.logout {
    margin-top: auto;
    color: #ffb4b4;
}

.main {
    min-width: 0;
    padding: 32px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 24px;
}

.topbar h1 {
    margin: 4px 0 0;
    font-size: 32px;
}

.api-pill,
.button,
button {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 8px;
    background: var(--primary);
    color: var(--primary-ink);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    padding: 0 16px;
}

.button.secondary {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
}

.button.danger,
button.danger {
    background: var(--danger);
}

.grid {
    display: grid;
    gap: 18px;
}

.stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat,
.panel,
.wallpaper-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.stat {
    padding: 20px;
}

.stat span,
.label,
label span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.stat strong {
    display: block;
    margin-top: 8px;
    font-size: 34px;
}

.panel {
    margin-bottom: 22px;
    padding: 22px;
}

.panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.panel h2,
.panel h3 {
    margin: 0;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.form-grid .full {
    grid-column: 1 / -1;
}

label {
    display: grid;
    gap: 7px;
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    font: inherit;
    padding: 10px 12px;
}

textarea {
    min-height: 90px;
    resize: vertical;
}

.radio-row,
.check-row,
.actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.radio-row label,
.check-row label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.radio-row input,
.check-row input {
    width: auto;
    min-height: auto;
}

.flash {
    margin-bottom: 18px;
    border-radius: 8px;
    padding: 13px 16px;
    font-weight: 700;
}

.flash.success {
    background: #e5f7ef;
    color: #126448;
}

.flash.error {
    background: #ffe9e9;
    color: #9f1f1f;
}

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

.table th,
.table td {
    border-bottom: 1px solid var(--line);
    padding: 13px 10px;
    text-align: left;
    vertical-align: middle;
}

.table th {
    color: var(--muted);
    font-size: 13px;
}

.wallpaper-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 18px;
}

.wallpaper-card {
    overflow: hidden;
}

.wallpaper-card img {
    display: block;
    width: 100%;
    aspect-ratio: 9 / 16;
    background: #dfe6ef;
    object-fit: cover;
}

.wallpaper-card-body {
    display: grid;
    gap: 10px;
    padding: 14px;
}

.wallpaper-title {
    margin: 0;
    font-size: 16px;
}

.meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--muted);
    font-size: 12px;
}

.badge {
    border-radius: 999px;
    background: #eef4ff;
    color: #1d4ed8;
    padding: 5px 8px;
}

.badge.green {
    background: #e4f8f0;
    color: #087054;
}

.empty {
    border: 1px dashed #b8c4d6;
    border-radius: 8px;
    color: var(--muted);
    padding: 34px;
    text-align: center;
}

@media (max-width: 900px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        height: auto;
    }

    .main {
        padding: 20px;
    }

    .stats,
    .form-grid {
        grid-template-columns: 1fr;
    }
}