:root { --navy:#0B1F4D; --blue:#2563EB; --orange:#F97316; --bg:#F8FAFC; --text:#111827; }
body { font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif; background: var(--bg); color: var(--text); }
.admin-shell { min-height: 100vh; }
.admin-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 260px;
    background: #081735;
    color: #fff;
    padding: 1rem;
    overflow-y: auto;
}
.admin-brand { display: flex; align-items: center; gap: .6rem; color: #fff; font-weight: 850; font-size: 1.05rem; margin-bottom: 1.4rem; text-decoration: none; }
.admin-sidebar a:not(.admin-brand) {
    display: flex;
    align-items: center;
    padding: .72rem .85rem;
    border-radius: 8px;
    color: rgba(255,255,255,.72);
    text-decoration: none;
    margin-bottom: .18rem;
    font-weight: 650;
}
.admin-sidebar a.active, .admin-sidebar a:hover { background: rgba(255,255,255,.12); color: #fff; }
.admin-main { margin-left: 260px; min-height: 100vh; }
.admin-topbar {
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 0;
    z-index: 10;
}
.admin-content { padding: 1.5rem; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1rem; }
.metric-card, .admin-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(15,23,42,.06);
}
.metric-card { padding: 1.2rem; position: relative; overflow: hidden; }
.metric-card span { color: #64748b; font-weight: 700; }
.metric-card strong { display: block; font-size: 2rem; color: var(--navy); }
.metric-card::after { content: ""; position: absolute; right: -30px; bottom: -30px; width: 90px; height: 90px; border-radius: 50%; background: rgba(37,99,235,.1); }
.admin-card { padding: 1.2rem; }
.table { vertical-align: middle; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; background: var(--orange); }
.skeleton { position: relative; overflow: hidden; background: #e2e8f0; border-radius: 8px; min-height: 120px; }
.skeleton::after { content:""; position:absolute; inset:0; transform:translateX(-100%); background:linear-gradient(90deg, transparent, rgba(255,255,255,.6), transparent); animation: shimmer 1.4s infinite; }
@keyframes shimmer { 100% { transform: translateX(100%); } }
.login-page { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(120deg, #081735, #2563EB); }
.login-card { width: min(430px, calc(100% - 2rem)); background: #fff; border-radius: 8px; padding: 1.5rem; box-shadow: 0 24px 70px rgba(0,0,0,.22); }
@media (max-width: 900px) {
    .admin-sidebar { position: static; width: 100%; height: auto; }
    .admin-main { margin-left: 0; }
    .metric-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 560px) { .metric-grid { grid-template-columns: 1fr; } .admin-content { padding: 1rem; } }