:root {
    --bg-primary: #0f172a;
    --bg-card: #1e293b;
    --bg-sidebar: #1e293b;
    --border: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --green: #22c55e;
    --yellow: #eab308;
    --red: #ef4444;
    --blue: #3b82f6;
    --cyan: #06b6d4;
    --orange: #f97316;
    --sidebar-width: 220px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
    position: fixed; top: 0; left: 0;
    width: var(--sidebar-width); height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    padding: 20px 0; z-index: 100;
    display: flex; flex-direction: column;
}
.sidebar-logo { padding: 0 20px 20px; border-bottom: 1px solid var(--border); margin-bottom: 10px; }
.sidebar-logo h2 { font-size: 16px; font-weight: 700; color: var(--blue); letter-spacing: -0.5px; }
.sidebar-logo small { font-size: 11px; color: var(--text-muted); }
.sidebar nav { flex: 1; }
.sidebar nav a {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 20px; color: var(--text-secondary);
    text-decoration: none; font-size: 13px; font-weight: 500;
    transition: all 0.15s; border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(59,130,246,0.08); color: var(--text-primary); }
.sidebar nav a.active { color: var(--blue); background: rgba(59,130,246,0.1); border-left-color: var(--blue); }
.sidebar nav a .icon { width: 18px; text-align: center; font-size: 14px; }
.sidebar-footer { padding: 15px 20px; border-top: 1px solid var(--border); font-size: 11px; color: var(--text-muted); }
.sidebar-footer a { color: var(--text-muted); text-decoration: none; }
.sidebar-footer a:hover { color: var(--red); }

/* ── Main Content ── */
.main { margin-left: var(--sidebar-width); padding: 24px 32px; min-height: 100vh; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-header h1 { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
.page-header .refresh-info { font-size: 11px; color: var(--text-muted); }

/* ── KPI Cards ── */
.kpi-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.kpi-card .label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 6px; }
.kpi-card .value { font-size: 32px; font-weight: 800; line-height: 1; }
.kpi-card .sub { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }
.kpi-card.green .value { color: var(--green); }
.kpi-card.yellow .value { color: var(--yellow); }
.kpi-card.red .value { color: var(--red); }
.kpi-card.blue .value { color: var(--blue); }
.kpi-card.cyan .value { color: var(--cyan); }
.kpi-card.orange .value { color: var(--orange); }
.kpi-card.gray .value { color: var(--text-muted); }

/* ── Cards Grid ── */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 16px; margin-bottom: 24px; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.card-title { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }

/* ── Tables ── */
.table-container { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin-bottom: 24px; overflow-x: auto; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data-table th { text-align: left; padding: 10px 12px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); border-bottom: 1px solid var(--border); font-weight: 600; white-space: nowrap; cursor: pointer; }
table.data-table td { padding: 10px 12px; border-bottom: 1px solid rgba(51,65,85,0.5); color: var(--text-secondary); }
table.data-table tr:hover td { background: rgba(59,130,246,0.04); }
table.data-table tr:last-child td { border-bottom: none; }

/* ── Badges ── */
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; }
.badge-green { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-yellow { background: rgba(234,179,8,0.15); color: var(--yellow); }
.badge-red { background: rgba(239,68,68,0.15); color: var(--red); }
.badge-blue { background: rgba(59,130,246,0.15); color: var(--blue); }
.badge-gray { background: rgba(100,116,139,0.15); color: var(--text-muted); }
.badge-orange { background: rgba(249,115,22,0.15); color: var(--orange); }

/* ── Filter bar ── */
.filter-bar { display: flex; gap: 12px; align-items: center; margin-bottom: 20px; flex-wrap: wrap; }
.filter-bar select, .filter-bar input {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 6px; padding: 8px 12px; color: var(--text-primary); font-size: 13px;
}
.filter-bar select:focus, .filter-bar input:focus { outline: none; border-color: var(--blue); }

/* ── Checkbox group ── */
.checkbox-group { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.checkbox-group label { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text-secondary); cursor: pointer; }
.checkbox-group input[type="checkbox"] { accent-color: var(--blue); }

/* ── Channel tags ── */
.canal-tag { display: inline-block; padding: 1px 6px; border-radius: 3px; font-size: 10px; font-weight: 600; background: rgba(59,130,246,0.12); color: var(--blue); margin: 1px 2px; }

/* ── Matrix grid (canais) ── */
.matrix-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-bottom: 24px; }
.matrix-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
    padding: 16px; cursor: pointer; transition: all 0.15s;
}
.matrix-card:hover { border-color: var(--blue); }
.matrix-card.selected { border-color: var(--blue); background: rgba(59,130,246,0.08); }
.matrix-card .canal-code { font-size: 18px; font-weight: 800; color: var(--blue); }
.matrix-card .canal-name { font-size: 11px; color: var(--text-muted); margin-bottom: 10px; }
.matrix-card .canal-stats { display: flex; flex-direction: column; gap: 4px; }
.matrix-card .stat-row { display: flex; justify-content: space-between; font-size: 12px; }
.matrix-card .stat-label { color: var(--text-muted); }
.matrix-card .stat-value { color: var(--text-primary); font-weight: 600; }

/* ── Chart container ── */
.chart-container { position: relative; height: 300px; }

/* ── Loading ── */
.loading { display: flex; align-items: center; justify-content: center; padding: 40px; color: var(--text-muted); font-size: 13px; }
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--blue); border-radius: 50%; animation: spin 0.8s linear infinite; margin-right: 10px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Pagination ── */
.pagination { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 16px; }
.btn-page { padding: 5px 12px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 6px; color: var(--text-secondary); cursor: pointer; font-size: 13px; transition: all 0.15s; }
.btn-page:hover:not(:disabled) { border-color: var(--blue); color: var(--blue); }
.btn-page:disabled { opacity: 0.3; cursor: not-allowed; }

/* ── Drill-down section ── */
.drill-down { display: none; margin-top: 24px; }
.drill-down.active { display: block; }
.drill-down-header { margin-bottom: 16px; }
.drill-down-header h3 { font-size: 16px; font-weight: 600; }
.drill-down-header .sub { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ── Login ── */
.login-container { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--bg-primary); }
.login-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 40px; width: 360px; }
.login-box h1 { font-size: 20px; font-weight: 700; margin-bottom: 6px; color: var(--blue); }
.login-box p { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }
.login-box .form-group { margin-bottom: 16px; }
.login-box label { display: block; font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; font-weight: 500; }
.login-box input { width: 100%; padding: 10px 12px; background: var(--bg-primary); border: 1px solid var(--border); border-radius: 6px; color: var(--text-primary); font-size: 14px; }
.login-box input:focus { outline: none; border-color: var(--blue); }
.login-box button { width: 100%; padding: 10px; background: var(--blue); color: white; border: none; border-radius: 6px; font-size: 14px; font-weight: 600; cursor: pointer; margin-top: 8px; transition: opacity 0.15s; }
.login-box button:hover { opacity: 0.9; }
.flash-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: var(--red); padding: 10px; border-radius: 6px; font-size: 13px; margin-bottom: 16px; }

/* ── Responsive ── */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main { margin-left: 0; padding: 16px; }
    .kpi-row { grid-template-columns: repeat(2, 1fr); }
    .cards-grid { grid-template-columns: 1fr; }
    .matrix-grid { grid-template-columns: repeat(2, 1fr); }
}