:root {
    --bg: #f5f6f8;
    --card-bg: #ffffff;
    --border: #e2e5ea;
    --text: #1c2333;
    --text-muted: #6b7280;
    --accent: #2f5eff;
    --accent-dark: #1e3fc4;
    --success: #16a34a;
    --danger: #dc2626;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar-inner {
    max-width: 1600px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 32px;
}
.brand { font-weight: 700; font-size: 18px; color: var(--text); display: flex; align-items: center; gap: 10px; }
.brand:hover { text-decoration: none; }
.brand-logo { height: 44px; width: auto; display: block; }

/* Hamburger toggle button — hidden on desktop, shown only on mobile below */
.nav-toggle {
    display: none;
    margin-left: auto;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

nav a {
    margin-right: 20px;
    color: var(--text-muted);
    font-weight: 500;
    padding-bottom: 4px;
}
nav a.active, nav a:hover { color: var(--accent); text-decoration: none; }

.page {
    max-width: 1600px;
    margin: 0 auto;
    padding: 28px 24px 60px;
}

h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 0 0 14px; }
.subtitle { color: var(--text-muted); margin: 0 0 24px; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.insights-card {
    background: #fffdf5;
    border: 1px solid #f5e6b8;
    border-left: 3px solid #f59e0b;
    border-radius: var(--radius);
    padding: 18px 22px;
    margin-bottom: 24px;
}
.insights-card .insights-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: .03em;
    margin-bottom: 12px;
    color: #92400e;
}
.insights-card .insights-title .tag {
    color: var(--text-muted);
    font-weight: 400;
    text-transform: none;
    font-size: 12px;
    letter-spacing: 0;
}
.insights-card ul { list-style: none; margin: 0; padding: 0; }
.insights-card li { display: flex; gap: 10px; padding: 6px 0; font-size: 14px; line-height: 1.5; }
.insights-card li .icon { flex-shrink: 0; }

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.kpi {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
}
.kpi .label { color: var(--text-muted); font-size: 13px; margin-bottom: 6px; text-transform: uppercase; letter-spacing: .03em; }
.kpi .value { font-size: 26px; font-weight: 700; }
.kpi .delta { font-size: 13px; margin-top: 4px; }
.delta.up { color: var(--success); }
.delta.down { color: var(--danger); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 800px) { .grid-2 { grid-template-columns: 1fr; } }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .03em;
}
tr:hover td { background: #fafbfc; }
.table-wrap { overflow-x: auto; }

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}
.filters select, .filters input[type=text], .filters input[type=date] {
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: #fff;
}
.filters button, .btn {
    padding: 8px 16px;
    border-radius: 6px;
    border: none;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    font-size: 14px;
}
.filters button:hover, .btn:hover { background: var(--accent-dark); }
.btn-outline {
    background: #fff;
    color: var(--accent);
    border: 1px solid var(--accent);
}
.btn-outline:hover { background: #eef2ff; }

.pagination { display: flex; gap: 6px; margin-top: 16px; align-items: center; }
.pagination a, .pagination span {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
}
.pagination .current { background: var(--accent); color: #fff; border-color: var(--accent); }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: #eef2ff;
    color: var(--accent);
}
.badge.success { background: #ecfdf3; color: var(--success); }
.badge.danger { background: #fef2f2; color: var(--danger); }
.badge.warn { background: #fff7ed; color: #c2410c; }
.badge.muted { background: #f1f5f9; color: var(--text-muted); }

.upload-box {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    background: #fff;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-success { background: #ecfdf3; color: #067647; border: 1px solid #abefc6; }
.alert-error { background: #fef2f2; color: #b42318; border: 1px solid #fecdca; }

.footer {
    border-top: 1px solid var(--border);
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 13px;
}
.footer-inner { max-width: 1600px; margin: 0 auto; }

.text-muted { color: var(--text-muted); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* ---------- Nav (hamburger kicks in earlier than layout changes,
   since the full nav needs ~850-900px to fit on one line — narrower
   than that and it would wrap awkwardly even on tablet-width screens) ---------- */
@media (max-width: 960px) {
    .topbar-inner {
        flex-wrap: wrap;
        gap: 12px;
        padding: 12px 16px;
        position: relative;
    }
    .brand-logo { height: 34px; }
    .brand span { font-size: 15px; }

    .nav-toggle { display: flex; }

    nav#mainNav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 2px;
        padding-top: 10px;
        border-top: 1px solid var(--border);
    }
    nav#mainNav.open { display: flex; }
    nav#mainNav a {
        margin-right: 0;
        padding: 10px 4px;
        border-bottom: 1px solid var(--border);
    }
    nav#mainNav a:last-child { border-bottom: none; }
}

/* ---------- Page layout (phone-width specific) ---------- */
@media (max-width: 768px) {
    .page { padding: 20px 16px 40px; }
    .kpi-grid { grid-template-columns: 1fr 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr; }
}