:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #DBEAFE;
    --secondary: #334155;
    --accent: #10B981;
    --surface: #F8FAFC;
    --card: #FFFFFF;
    --text: #1E293B;
    --muted: #64748B;
    --border: #E2E8F0;
    --success: #16A34A;
    --warning: #F59E0B;
    --danger: #DC2626;
    --info: #2563EB;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Inter, Segoe UI, Arial, sans-serif;
    color: var(--text);
    background: var(--surface);
}

.admin-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 250px;
    background: linear-gradient(180deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 24px 18px;
    display: flex;
    flex-direction: column;
}
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 28px; }
.brand.centered { justify-content: center; margin-bottom: 20px; }
.brand-icon {
    width: 42px; height: 42px; border-radius: 12px;
    background: rgba(255,255,255,.18); display: grid; place-items: center;
    font-size: 24px; font-weight: 700;
}
.brand small { display: block; opacity: .85; }
.sidebar nav { display: grid; gap: 8px; }
.sidebar nav a {
    color: #fff; text-decoration: none; padding: 12px 14px; border-radius: 12px;
}
.sidebar nav a.active, .sidebar nav a:hover { background: rgba(255,255,255,.16); }
.logout-form { margin-top: auto; }
.logout-form button {
    width: 100%; border: 1px solid rgba(255,255,255,.35); background: transparent;
    color: #fff; padding: 10px 14px; border-radius: 12px; cursor: pointer;
}

.content { flex: 1; padding: 24px; }
.topbar {
    display: flex; justify-content: space-between; align-items: center; gap: 16px;
    margin-bottom: 20px;
}
.topbar h1 { margin: 0 0 4px; font-size: 28px; }
.topbar p { margin: 0; color: var(--muted); }
.user-chip {
    background: var(--card); border: 1px solid var(--border); padding: 10px 14px;
    border-radius: 999px; font-weight: 600;
}

.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px; margin-bottom: 20px;
}
.stat-card {
    background: var(--card); border-radius: 16px; padding: 18px;
    box-shadow: 0 4px 16px rgba(0,0,0,.05);
}
.stat-card strong { display: block; font-size: 28px; margin: 6px 0; }
.stat-label, .stat-card small { color: var(--muted); }

.panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.panel {
    background: var(--card); border-radius: 16px; padding: 18px;
    box-shadow: 0 4px 16px rgba(0,0,0,.05);
}
.panel h2 { margin: 0 0 14px; font-size: 18px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; }
.empty { text-align: center; color: var(--muted); }
.report-range { margin: 0 0 14px; font-size: 14px; }
.totals-row td { background: var(--primary-light); font-weight: 600; }
.back-link { margin: 0 0 16px; }
.back-link a { color: var(--primary-dark); text-decoration: none; font-weight: 600; }
.actions-cell { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.badge {
    display: inline-block; padding: 4px 10px; border-radius: 999px;
    background: var(--primary-light); color: var(--primary-dark); font-size: 12px; font-weight: 600;
}
.badge-success { background: #e8f8f4; color: #0f766e; }
.badge-warning { background: #fff7e6; color: #b45309; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar input, .toolbar select, label input, label select {
    border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; font: inherit;
}
.toolbar input[type=search] { min-width: 260px; flex: 1; }

.btn {
    border: none; border-radius: 12px; padding: 10px 16px; font: inherit; cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-secondary { background: #eef2f7; color: var(--text); }
.btn-small { padding: 6px 12px; font-size: 13px; }
.inline-form { display: inline; }

.alert { padding: 12px 14px; border-radius: 12px; margin-bottom: 16px; }
.alert-success, .alert.success { background: #e8f8f4; color: #0f766e; }
.alert-error, .alert.danger { background: #fdecec; color: #b42318; }
.alert ul { margin: 0; padding-left: 18px; }
.pager { margin-top: 16px; }
.login-card form { display: grid; gap: 14px; margin-top: 18px; }
.login-card input[type=email],
.login-card input[type=password] {
    border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; font: inherit;
}
.login-card button[type=submit] {
    border: none; border-radius: 12px; padding: 12px 16px; font: inherit;
    background: var(--primary); color: #fff; cursor: pointer; font-weight: 600;
}

.pagination-wrap { margin-top: 16px; }
.pagination { display: flex; gap: 8px; list-style: none; padding: 0; }
.pagination a, .pagination span {
    display: inline-block; padding: 8px 12px; border-radius: 10px;
    border: 1px solid var(--border); text-decoration: none; color: var(--text);
}
.pagination .active span { background: var(--primary); color: #fff; border-color: var(--primary); }

.login-page {
    min-height: 100vh; display: grid; place-items: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}
.login-card {
    width: min(420px, 92vw); background: var(--card); border-radius: 20px;
    padding: 28px; box-shadow: 0 20px 50px rgba(0,0,0,.15);
}
.login-card h1 { margin: 0 0 8px; }
.muted, .hint { color: var(--muted); }
.hint { margin-top: 18px; font-size: 13px; text-align: center; }
.stack { display: grid; gap: 14px; margin-top: 18px; }
label { display: grid; gap: 6px; font-weight: 600; font-size: 14px; }
.checkbox { display: flex; align-items: center; gap: 8px; font-weight: 500; }

@media (max-width: 900px) {
    .admin-shell { flex-direction: column; }
    .sidebar { width: 100%; }
}