:root {
    --bg: #f0f4f8;
    --bg-gradient: linear-gradient(135deg, #f0f4f8 0%, #e0e8f5 100%);
    --card-bg: #ffffff;
    --text: #212529;
    --text-muted: #6c757d;
    --primary: #4361ee;
    --primary-light: rgba(67, 97, 238, 0.1);
    --accent: #ff9f1c;
    --success: #2ec4b6;
    --danger: #ef233c;
    --border: #e2e8f0;
    --shadow: 0 8px 24px rgba(67, 97, 238, 0.08);

    /* Colori specifici Navbar */
    --navbar-bg: var(--primary);
    --navbar-text: #ffffff;
    --navbar-border: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] {
    --bg: #121212;
    --bg-gradient: linear-gradient(135deg, #121212 0%, #1a1a1a 100%);
    --card-bg: #1e1e1e;
    --text: #e9ecef;
    --text-muted: #adb5bd;
    --primary: #4cc9f0;
    --danger: #ff5c5c;
    --border: #333333;
    --shadow: 0 4px 12px rgba(0,0,0,0.4);

    /* Navbar in Dark Mode: non blu acceso, ma un dark elegante */
    --navbar-bg: #1a1a1a;
    --navbar-text: #e9ecef;
    --navbar-border: #333333;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', system-ui, sans-serif; background: var(--bg-gradient); background-color: var(--bg); background-attachment: fixed; min-height: 100vh; color: var(--text); transition: background 0.3s, color 0.3s; line-height: 1.6; }

.container { max-width: 1100px; margin: 2rem auto; padding: 0 1rem; display: flex; flex-direction: column; gap: 2rem; }
.card { background: var(--card-bg); border-radius: 12px; padding: 1.5rem; border: 1px solid var(--border); box-shadow: var(--shadow); transition: background 0.3s, border 0.3s; }

/* Navbar */
.navbar { background: var(--navbar-bg); padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--navbar-border); position: sticky; top: 0; z-index: 100; transition: background 0.3s; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.logo { font-weight: 800; font-size: 1.4rem; color: var(--navbar-text); display: flex; align-items: center; gap: 10px; }
.year-selector-container { display: flex; align-items: center; gap: 0.5rem; }

/* Controlli dentro la Navbar (sovrastati per stare su sfondo colorato) */
.navbar .icon-btn { color: var(--navbar-text); border: 1px solid var(--navbar-border); background: rgba(255,255,255,0.05); }
.navbar .icon-btn:hover { background: rgba(255,255,255,0.15); }
.navbar select#yearPicker { padding: 0.5rem 1rem; border-radius: 8px; border: 1px solid var(--navbar-border); background: rgba(255,255,255,0.1); color: var(--navbar-text); font-weight: bold; cursor: pointer; transition: 0.2s; outline: none; }
.navbar select#yearPicker option { background: var(--card-bg); color: var(--text); }
.navbar .sync-badge { border-color: var(--navbar-border) !important; color: var(--navbar-text); background: rgba(255,255,255,0.1); }

/* Month Grid */
.month-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; margin-top: 1rem; }
.month-box { padding: 0.8rem; border: 1px solid var(--border); border-radius: 8px; text-align: center; cursor: pointer; transition: 0.2s; font-size: 0.85rem; font-weight: 600; }
.month-box:hover { border-color: var(--primary); transform: translateY(-2px); }
.month-box.is-selected { background: var(--primary); color: white; border-color: var(--primary); box-shadow: 0 4px 10px rgba(67, 97, 238, 0.3); }
.month-box.has-data { border-bottom: 3px solid var(--success); }
.month-box.extra { background: var(--primary-light); color: var(--primary); border-style: dashed; }
.month-box.is-current-glob { outline: 2px solid var(--accent); outline-offset: 2px; }

/* YTD Badge */
.ytd-badge { display: inline-flex; align-items: center; gap: 6px; padding: 0.3rem 0.6rem; border-radius: 8px; font-size: 0.85rem; font-weight: 700; border: 1px solid var(--border); }
.ytd-badge.pos { color: var(--success); border-color: var(--success); background: rgba(46, 196, 182, 0.1); }
.ytd-badge.neg { color: var(--danger); border-color: var(--danger); background: rgba(239, 35, 60, 0.1); }
.ytd-badge.neu { color: var(--text-muted); background: var(--card-bg); }

/* Input Section */
.input-section { text-align: center; max-width: 600px; margin: 0 auto; width: 100%; }
.input-container { display: flex; align-items: center; justify-content: center; margin: 1.5rem 0; font-size: 2.5rem; }
#salaryInput { width: 250px; border: none; border-bottom: 3px solid var(--primary); background: transparent; color: var(--text); text-align: center; font-weight: 700; outline: none; }
#salaryDisplay { width: 250px; border: none; border-bottom: 3px solid var(--primary); background: transparent; color: var(--text); text-align: center; font-weight: 700; outline: none; font-size: inherit; font-family: inherit; transition: 0.3s; }
#salaryDisplay:focus { border-bottom-color: var(--accent); }

.form-actions { display: flex; justify-content: space-between; gap: 1rem; }
.btn { padding: 0.8rem 1.5rem; border-radius: 8px; border: none; cursor: pointer; font-weight: 600; transition: 0.2s; }
.btn-primary { background: var(--primary); color: white; flex-grow: 2; box-shadow: 0 4px 10px rgba(67, 97, 238, 0.3); }
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-nav { background: var(--border); color: var(--text); }

/* KPI Grid */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.kpi-card { background: var(--card-bg); padding: 1.5rem; border-radius: 12px; border: 1px solid var(--border); text-align: center; transition: transform 0.3s, border-color 0.3s; }
.kpi-card:hover { transform: translateY(-3px); border-color: var(--primary-light); }
.kpi-card small { color: var(--text-muted); text-transform: uppercase; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.5px; }
.kpi-card div { font-size: 1.4rem; font-weight: 800; color: var(--primary); margin-top: 0.5rem; }

/* Charts Layout */
.charts-container { display: flex; flex-direction: column; gap: 2rem; width: 100%; }
.chart-card { min-height: 400px; height: 400px; display: flex; flex-direction: column; width: 100%; }

.card-header-flex { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; gap: 10px; }
.compare-controls select { padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font-size: 0.9rem; cursor: pointer; outline: none; }

.chart-wrapper { position: relative; flex-grow: 1; min-height: 0; width: 100%; }

/* --- Grafico Annuale (SCROLLABILE) --- */
.chart-wrapper-scrollable { position: relative; flex-grow: 1; width: 100%; overflow-x: auto; overflow-y: hidden; scrollbar-width: thin; scrollbar-color: var(--primary-light) transparent; }
.chart-scroll-inner { height: 100%; position: relative; }

/* Table */
.table-wrapper { overflow-x: auto; margin-top: 1rem; }
table { width: 100%; border-collapse: collapse; }
th { text-transform: uppercase; font-size: 0.8rem; color: var(--text-muted); letter-spacing: 0.5px; }
th, td { text-align: left; padding: 1rem; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.2s; }
tbody tr:hover { background: var(--primary-light); }

/* Utility */
.icon-btn { background: none; border: 1px solid var(--border); padding: 0.6rem; border-radius: 8px; color: var(--text); cursor: pointer; transition: 0.2s; }
.icon-btn:hover:not(.navbar .icon-btn) { background: var(--bg); }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #2b2d42; color: white; padding: 12px 24px; border-radius: 50px; opacity: 0; transition: 0.3s; z-index: 1000; pointer-events: none; font-weight: 600; box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
.toast.show { opacity: 1; bottom: 40px; }

@media (max-width: 850px) {
    .month-grid { grid-template-columns: repeat(4, 1fr); }
    .chart-card { height: 350px; }
    .navbar { padding: 1rem; }
}