/* ==================== ALIS DESIGN SYSTEM ==================== */
/* Dashboard Fatture - Professional Design System */
/* Version: 2.0.0 */
/* Last Updated: 2025-10-29 */

:root {
    /* Primary Colors */
    --color-primary-dark: #0F2654;
    --color-primary-medium: #1E3A8A;
    --color-accent-green: #047857;

    /* Background Colors */
    --color-bg-dark: #0A0E27;
    --color-bg-secondary: #0F1729;
    --color-bg-tertiary: #131C3B;
    --color-surface: #FFFFFF;
    --color-surface-alt: #F8FAFC;
    --color-surface-hover: #F1F5F9;

    /* Text Colors */
    --color-text-primary: #0F172A;
    --color-text-secondary: #475569;
    --color-text-tertiary: #78716C;
    --color-text-white: #FFFFFF;

    /* Border Colors */
    --color-border: #E2E8F0;
    --color-border-dark: #CBD5E1;
    --color-border-light: #F1F5F9;

    /* Status Colors */
    --color-success: #059669;
    --color-success-light: #10B981;
    --color-success-bg: #ECFDF5;
    --color-warning: #D97706;
    --color-warning-light: #F59E0B;
    --color-warning-bg: #FFFBEB;
    --color-danger: #DC2626;
    --color-danger-light: #EF4444;
    --color-danger-bg: #FEF2F2;
    --color-info: #0284C7;
    --color-info-light: #06B6D4;
    --color-info-bg: #F0F9FF;

    /* Shadows (Squared, Professional) */
    --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.1), 0 1px 2px 0 rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -1px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -2px rgba(15, 23, 42, 0.05);

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */

    /* Spacing */
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */

    /* Border Radius (SQUARED - Professional) */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-Index Layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ==================== GLOBAL RESET ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-surface-alt);
    min-height: 100vh;
}

/* ==================== LAYOUT SYSTEM ==================== */
.layout {
    display: flex;
    min-height: 100vh;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    width: 100%;
}

/* ==================== HEADER ==================== */
.header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-4) var(--spacing-6);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.header-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-medium) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-white);
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.header-text h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary-dark);
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.header-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.header-sync-info {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-align: right;
}

.header-sync-time {
    color: var(--color-text-tertiary);
    display: block;
}

/* ==================== SIDEBAR ==================== */
.sidebar {
    width: 260px;
    background-color: var(--color-surface);
    border-right: 1px solid var(--color-border);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: var(--z-fixed);
    transition: transform var(--transition-base);
}

.sidebar-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.sidebar-logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-medium) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-white);
    font-weight: 700;
    font-size: var(--font-size-base);
}

.sidebar-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary-dark);
}

.sidebar-nav {
    padding: var(--spacing-4) 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-6);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    text-decoration: none;
}

.nav-item:hover {
    background-color: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.nav-item.active {
    background-color: var(--color-primary-dark);
    color: var(--color-text-white);
    border-left-color: var(--color-accent-green);
}

.nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

/* ==================== MAIN CONTENT ==================== */
.content {
    flex: 1;
    margin-left: 260px;
    padding: var(--spacing-8);
    min-height: 100vh;
}

.page-content {
    display: none;
}

.page-content.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== CARDS ==================== */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-1);
}

/* ==================== STATS GRID ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.stat-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
}

.stat-label {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.stat-card.success .stat-value { color: var(--color-success); }
.stat-card.warning .stat-value { color: var(--color-warning); }
.stat-card.danger .stat-value { color: var(--color-danger); }
.stat-card.info .stat-value { color: var(--color-info); }

/* ==================== BADGE SYSTEM ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(5, 150, 105, 0.2);
}

.badge-warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid rgba(217, 119, 6, 0.2);
}

.badge-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.badge-info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid rgba(2, 132, 199, 0.2);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary-dark);
    color: var(--color-text-white);
}

.btn-primary:hover {
    background-color: var(--color-primary-medium);
}

.btn-secondary {
    background-color: var(--color-surface-alt);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-surface-hover);
}

/* ==================== TABLES ==================== */
.table-container {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.table-header {
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.table-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background-color: var(--color-surface-alt);
    border-bottom: 1px solid var(--color-border);
}

th {
    text-align: left;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-secondary);
    font-weight: 600;
    white-space: nowrap;
}

td {
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--color-border-light);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    white-space: nowrap;
}

tr:last-child td {
    border-bottom: none;
}

tbody tr:hover {
    background-color: var(--color-surface-hover);
}

/* ==================== LOADING STATES ==================== */
.loading-container {
    padding: var(--spacing-12);
    text-align: center;
}

.spinner {
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary-dark);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-4);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg,
        var(--color-surface-alt) 0%,
        var(--color-border-light) 50%,
        var(--color-surface-alt) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

.skeleton-card {
    padding: var(--spacing-6);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.skeleton-line {
    height: 20px;
    margin-bottom: var(--spacing-3);
    border-radius: var(--radius-md);
}

.skeleton-line:last-child {
    margin-bottom: 0;
}

.skeleton-line.short {
    width: 60%;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ==================== ERROR STATES ==================== */
.error-container {
    background-color: var(--color-danger-bg);
    border: 1px solid var(--color-danger);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    text-align: center;
}

.error-icon {
    width: 48px;
    height: 48px;
    background-color: var(--color-danger);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-4);
    color: var(--color-text-white);
}

.error-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-danger);
    margin-bottom: var(--spacing-2);
}

.error-message {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-4);
}

.empty-state {
    padding: var(--spacing-12);
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-4);
    opacity: 0.3;
}

/* ==================== CHARTS ==================== */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.chart-container {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
}

.chart-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

/* ==================== MOBILE HAMBURGER ==================== */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: var(--spacing-4);
    left: var(--spacing-4);
    z-index: calc(var(--z-fixed) + 10);
    width: 40px;
    height: 40px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    box-shadow: var(--shadow-sm);
}

.mobile-menu-btn span {
    width: 20px;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
}

.mobile-overlay.active {
    display: block;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .content {
        margin-left: 0;
        padding: var(--spacing-4);
    }

    .mobile-menu-btn {
        display: flex;
    }

    .header-logo-icon {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-base);
    }

    .header-text h1 {
        font-size: var(--font-size-lg);
    }

    .header-subtitle {
        display: none;
    }

    .stat-value {
        font-size: var(--font-size-2xl);
    }

    table {
        font-size: var(--font-size-xs);
    }

    th, td {
        padding: var(--spacing-2) var(--spacing-3);
    }
}

/* ==================== ACCESSIBILITY ==================== */
.nav-item:focus,
.btn:focus {
    outline: 2px solid var(--color-primary-medium);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== UTILITY CLASSES ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }