:root {
    --rz-primary: #2C5A92;
    --rz-primary-dark: #1B3A63;
    --rz-secondary: #1B2A4A;
}

html, body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
    background: #f4f7fb;
    color: #24303f;
}

* { box-sizing: border-box; }
a { color: #2C5A92; text-decoration: none; }

.admin-shell { display: flex; min-height: 100vh; }

/* Sidebar */
.admin-sidebar {
    width: 240px; background: #1B2A4A; color: #cfd9e8; flex: none;
    display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
}
.admin-brand { display: flex; align-items: center; gap: .6rem; padding: 1.1rem 1.2rem; border-bottom: 1px solid rgba(255,255,255,.1); }
.admin-brand img { height: 34px; }
.admin-brand b { color: #fff; font-size: .95rem; letter-spacing: .06em; }
.admin-nav { padding: .8rem .6rem; display: flex; flex-direction: column; gap: .2rem; }
.admin-nav a {
    color: #cfd9e8; padding: .6rem .8rem; border-radius: 8px; font-weight: 600; font-size: .92rem;
    display: flex; align-items: center; gap: .6rem;
}
.admin-nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.admin-nav a.active { background: #2C5A92; color: #fff; }

/* Main */
.admin-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
    height: 62px; background: #fff; border-bottom: 1px solid #dbe3ee; display: flex; align-items: center;
    padding: 0 1.4rem; gap: 1rem; position: sticky; top: 0; z-index: 20;
}
.admin-topbar h1 { font-size: 1.1rem; margin: 0; color: #0F1B2D; }
.admin-topbar .spacer { margin-left: auto; }
.admin-user { display: flex; align-items: center; gap: .8rem; font-size: .9rem; color: #5b6675; }
.admin-content { padding: 1.6rem; flex: 1 1 auto; }

/* KPI cards */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.kpi-card { background: #fff; border: 1px solid #dbe3ee; border-radius: 12px; padding: 1.2rem; box-shadow: 0 6px 24px rgba(27,42,74,.06); }
.kpi-card .kpi-label { color: #5b6675; font-size: .82rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.kpi-card .kpi-value { font-size: 2rem; font-weight: 800; color: #1B2A4A; margin-top: .3rem; }

.admin-card { background: #fff; border: 1px solid #dbe3ee; border-radius: 12px; padding: 1.4rem; box-shadow: 0 6px 24px rgba(27,42,74,.06); }
.admin-page-head { display: flex; align-items: center; margin-bottom: 1.2rem; }
.admin-page-head .spacer { margin-left: auto; }

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #1B2A4A, #2C5A92); }
.login-card { background: #fff; border-radius: 16px; padding: 2.2rem; width: 360px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.login-card img { height: 46px; display: block; margin: 0 auto 1rem; }
.login-card h1 { text-align: center; font-size: 1.2rem; margin: 0 0 1.4rem; }
.login-card label { font-weight: 600; font-size: .85rem; display: block; margin-bottom: .3rem; }
.login-card input { width: 100%; padding: .7rem .8rem; border: 1px solid #dbe3ee; border-radius: 8px; margin-bottom: 1rem; font-size: .95rem; }
.login-card button { width: 100%; padding: .75rem; background: #2C5A92; color: #fff; border: none; border-radius: 8px; font-weight: 700; cursor: pointer; font-size: .95rem; }
.login-card button:hover { background: #1B3A63; }
.login-error { background: #fdeaea; color: #b3261e; padding: .6rem .8rem; border-radius: 8px; font-size: .88rem; margin-bottom: 1rem; }

@media (max-width: 800px) {
    .admin-sidebar { position: fixed; z-index: 50; transform: translateX(-100%); transition: transform .2s; }
    .kpi-grid { grid-template-columns: 1fr 1fr; }
}