:root {
    --bg-app: #18181b;
    --bg-sidebar: #27272a;
    --bg-panel: #27272a;
    --border: #3f3f46;
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #a1a1aa;
    --accent-dim: rgba(161, 161, 170, 0.15);
    --success: #4ade80;
    --danger: #f87171;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-app);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

/* LAYOUT */
.app-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    height: 100vh;
}

/* SIDEBAR */
.sidebar {
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px; height: 32px;
    background: var(--text-primary);
    color: var(--bg-app);
    border-radius: 6px;
    display: grid;
    place-items: center;
    font-size: 1.2rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    margin-bottom: 0.25rem;
    transition: all 0.2s;
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-item:hover {
    background: rgba(255,255,255,0.04);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--accent-dim);
    color: var(--text-primary);
    font-weight: 600;
}

/* NUOVA REGOLA: Stile per link non attivi */
.nav-item[href="#"] {
    opacity: 0.6;
    cursor: not-allowed;
}
.nav-item[href="#"]:hover {
    background: none;
    color: var(--text-secondary);
}
.nav-item.active[href="#"] {
    opacity: 1;
    cursor: default;
}


.sidebar-footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--success);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.dot {
    width: 8px; height: 8px;
    background: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(74, 222, 128, 0.4);
}

/* MAIN CONTENT */
.main-content {
    background: var(--bg-app);
    overflow-y: auto;
    padding: 2rem;
}

/* TOPBAR */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2.5rem;
}

.page-title h1 { margin: 0; font-size: 1.5rem; font-weight: 600; }
.page-title p { margin: 0.25rem 0 0; color: var(--text-secondary); font-size: 0.9rem; }

.controls { display: flex; gap: 1rem; }

.control-group {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0 0.75rem;
}

.control-group i { color: var(--text-secondary); margin-right: 0.5rem; }

select, input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 0.6rem 0;
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    min-width: 140px;
}

/* NUOVA REGOLA: Corregge il menu a tendina bianco su bianco */
select option {
    background-color: var(--bg-sidebar);
    color: var(--text-primary);
}

.btn-icon {
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    color: var(--text-primary);
    width: 40px; height: 40px;
    border-radius: 6px;
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: 0.2s;
}
.btn-icon:hover { border-color: var(--text-secondary); }

/* KPI GRID */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.kpi-value { font-size: 2rem; font-weight: 600; color: var(--text-primary); letter-spacing: -0.03em; }
.kpi-sub { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.5rem; }
.kpi-trend { font-size: 0.8rem; margin-top: 0.5rem; display: flex; align-items: center; gap: 4px; }
.positive { color: var(--success); }

/* CHARTS */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.panel-header h3 { margin: 0; font-size: 1rem; font-weight: 600; }
.chart-wrapper { position: relative; height: 300px; width: 100%; }
.btn-text { background: none; border: 1px solid var(--border); color: var(--text-secondary); padding: 4px 10px; border-radius: 4px; font-size: 0.75rem; cursor: pointer; }
.btn-text:hover { color: var(--text-primary); border-color: var(--text-secondary); }

/* TABLE */
.search-input { background: var(--bg-app); border: 1px solid var(--border); padding: 0.4rem 0.8rem; border-radius: 4px; font-size: 0.85rem; }
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th { text-align: left; color: var(--text-secondary); font-weight: 500; padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); color: var(--text-primary); }
tr:last-child td { border-bottom: none; }
.text-right { text-align: right; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-app); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* NUOVE REGOLE: Correzione Stili per Date Picker (Flatpickr) */
.flatpickr-calendar.dark {
    background: var(--bg-panel);
    border: 1px solid var(--border);
}
.flatpickr-day.selected, .flatpickr-day.startRange, .flatpickr-day.endRange {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-app);
}
.flatpickr-day:hover {
    background: var(--border);
}
.flatpickr-months .flatpickr-month, .flatpickr-current-month .flatpickr-monthDropdown-months {
    color: var(--text-primary);
}
span.flatpickr-weekday, .numInput, .arrowUp, .arrowDown {
    color: var(--text-secondary);
}

@media (max-width: 1024px) {
    .app-layout { grid-template-columns: 1fr; }
    .sidebar { display: none; }
    .charts-grid { grid-template-columns: 1fr; }
}