/* ===================================================================
   后台布局：左侧导航 + 内容区
   =================================================================== */
.admin-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 232px minmax(0, 1fr);
    min-height: 100vh;
}

.side {
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    padding: 22px 16px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.side .brand { padding: 0 8px 18px; }

.side-label {
    font-size: 11px;
    letter-spacing: .8px;
    color: var(--muted);
    text-transform: uppercase;
    padding: 14px 10px 6px;
}

.side a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 11px;
    border-radius: 9px;
    color: var(--text-dim);
    font-size: 13px;
    transition: .16s;
}
.side a:hover { background: var(--surface-2); color: var(--text); opacity: 1; }
.side a.active {
    background: linear-gradient(100deg, rgba(124, 92, 255, .22), rgba(124, 92, 255, .06));
    color: #fff;
    box-shadow: inset 0 0 0 1px rgba(124, 92, 255, .35);
}
[data-theme="light"] .side a.active { color: var(--primary-2); }
.side a .ico { width: 18px; text-align: center; opacity: .9; font-size: 13px; }

.side-foot { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--border-soft); }

.main { padding: 24px 28px 48px; min-width: 0; }

.page-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}
.page-head h1 { font-size: 21px; }
.page-head p { margin: 4px 0 0; color: var(--muted); font-size: 12.5px; }

.user-chip {
    display: flex; align-items: center; gap: 9px;
    padding: 6px 10px 6px 6px;
    border-radius: 999px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    font-size: 12.5px;
    color: var(--text-dim);
}
.user-chip .avatar {
    width: 26px; height: 26px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #3ddad7);
    display: grid; place-items: center; color: #fff; font-size: 12px; font-weight: 700;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
    margin-bottom: 22px;
}
.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    position: relative;
    overflow: hidden;
}
.stat::after {
    content: "";
    position: absolute;
    right: -30px; top: -30px;
    width: 90px; height: 90px; border-radius: 50%;
    background: radial-gradient(circle, rgba(124, 92, 255, .18), transparent 70%);
}
.stat .label { color: var(--muted); font-size: 12px; }
.stat .value { font-size: 25px; font-weight: 800; letter-spacing: -.5px; margin-top: 4px; }
.stat .sub { color: var(--muted); font-size: 11.5px; margin-top: 2px; }

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0;
    overflow: hidden;
    margin-bottom: 20px;
}
.panel-head {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; flex-wrap: wrap;
    padding: 15px 18px;
    border-bottom: 1px solid var(--border);
}
.panel-head h2 { font-size: 14px; }
.panel-body { padding: 18px; }

.filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    background: var(--surface-2);
}
.filters input[type="search"], .filters select, .filters input[type="text"] {
    width: auto;
    min-width: 150px;
    padding: 8px 11px;
    font-size: 12.5px;
}

.pager {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 18px;
    border-top: 1px solid var(--border);
    font-size: 12.5px;
    color: var(--muted);
    flex-wrap: wrap;
}
.pager .pages { display: flex; gap: 6px; }
.pager .pages a, .pager .pages span {
    padding: 5px 10px; border-radius: 7px; border: 1px solid var(--border);
    color: var(--text-dim); font-size: 12px;
}
.pager .pages a:hover { border-color: var(--primary); color: var(--text); opacity: 1; }
.pager .pages .cur { background: var(--primary-soft); border-color: rgba(124, 92, 255, .45); color: #fff; }
[data-theme="light"] .pager .pages .cur { color: var(--primary-2); }

.row-actions { display: flex; gap: 6px; }
.inline-form { display: inline; }

.empty { padding: 44px 20px; text-align: center; color: var(--muted); font-size: 13px; }
.empty .big { font-size: 26px; opacity: .5; display: block; margin-bottom: 8px; }

.gen-codes {
    background: var(--bg-soft);
    border: 1px dashed rgba(124, 92, 255, .4);
    border-radius: var(--radius-sm);
    padding: 14px;
    font-family: var(--mono);
    font-size: 12.5px;
    line-height: 2;
    max-height: 260px;
    overflow: auto;
    color: var(--text);
    white-space: pre-wrap;
    word-break: break-all;
}

.tabs { display: flex; gap: 6px; flex-wrap: wrap; padding: 12px 18px; border-bottom: 1px solid var(--border); }
.tabs a {
    padding: 6px 13px; border-radius: 8px; font-size: 12.5px;
    color: var(--muted); border: 1px solid transparent;
}
.tabs a:hover { color: var(--text); background: var(--surface-2); opacity: 1; }
.tabs a.on { background: var(--primary-soft); color: #fff; border-color: rgba(124, 92, 255, .4); }
[data-theme="light"] .tabs a.on { color: var(--primary-2); }

/* 登录页 */
.login-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}
.login-card { width: 100%; max-width: 380px; }
.login-card .brand { justify-content: center; margin-bottom: 20px; }

@media (max-width: 900px) {
    .admin-shell { grid-template-columns: 1fr; }
    .side {
        position: relative; height: auto; flex-direction: row; flex-wrap: wrap;
        align-items: center; border-right: none; border-bottom: 1px solid var(--border);
        padding: 12px;
    }
    .side .brand { padding: 0 8px; }
    .side-label { display: none; }
    .side-foot { margin: 0 0 0 auto; padding: 0; border: none; }
    .main { padding: 18px 16px 40px; }
}