/* ============================================================
   Erasmusys — Windows 11 Fluent Design System (Light Theme)
   Inspired by Microsoft Fluent UI / WinUI 3
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Segoe+UI:wght@300;400;500;600;700&family=Inter:ital,opsz,wght@0,14..32,300;0,14..32,400;0,14..32,500;0,14..32,600;0,14..32,700&display=swap');
@import url('https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css');

/* ── Fluent Design Tokens ───────────────────────────────── */
:root {
    --sidebar-w:   260px;
    --navbar-h:    48px;

    /* Windows 11 Color System */
    --win-accent:       #0078D4;   /* Windows Blue */
    --win-accent-light: #50A0E0;
    --win-accent-dark:  #005A9E;
    --win-accent-bg:    rgba(0,120,212,0.08);

    /* Mica / Background layers */
    --win-bg:           #F3F3F3;   /* Windows 11 default background */
    --win-surface:      #FFFFFF;   /* Card / panel surface */
    --win-surface-alt:  #FAFAFA;   /* Alternate rows */
    --win-layer:        rgba(255,255,255,0.72); /* Acrylic layer */

    /* Sidebar (Windows NavigationView style) */
    --sidebar-bg:       #F3F3F3;
    --sidebar-border:   #E0E0E0;
    --sidebar-hover:    rgba(0,0,0,0.04);
    --sidebar-active-bg: rgba(0,120,212,0.10);
    --sidebar-active-bar: #0078D4;
    --sidebar-text:     #1A1A1A;
    --sidebar-muted:    #787878;

    /* Borders */
    --win-border:       #E0E0E0;
    --win-border-focus: #0078D4;

    /* Shadows (Windows 11 uses very subtle elevation) */
    --shadow-2:  0 1px 2px rgba(0,0,0,0.08), 0 0 1px rgba(0,0,0,0.06);
    --shadow-4:  0 2px 4px rgba(0,0,0,0.10), 0 0 1px rgba(0,0,0,0.06);
    --shadow-8:  0 4px 8px rgba(0,0,0,0.12), 0 0 1px rgba(0,0,0,0.06);
    --shadow-16: 0 8px 16px rgba(0,0,0,0.12), 0 0 1px rgba(0,0,0,0.06);

    /* Radius — Windows 11 uses rounded corners */
    --radius-sm:  4px;
    --radius-md:  8px;
    --radius-lg:  12px;
    --radius-xl:  16px;

    /* Status Colors */
    --win-success:  #107C10;
    --win-warning:  #F7A600;
    --win-danger:   #C42B1C;
    --win-info:     #0078D4;

    --card-bg:     #FFFFFF;
    --card-border: #E0E0E0;
    --card-shadow: var(--shadow-4);
    --card-radius: var(--radius-lg);

    --text-main:        #1A1A1A;
    --text-muted:       #5A5A5A;
}

[data-theme="dark"] {
    --win-accent-bg:    rgba(0,120,212,0.15);
    
    --win-bg:           #202020;   
    --win-surface:      #2C2C2C;   
    --win-surface-alt:  #333333;   
    --win-layer:        rgba(44,44,44,0.72); 
    
    --sidebar-bg:       #202020;
    --sidebar-border:   #404040;
    --sidebar-hover:    rgba(255,255,255,0.06);
    --sidebar-active-bg: rgba(0,120,212,0.20);
    --sidebar-text:     #FFFFFF;
    --sidebar-muted:    #A0A0A0;
    
    --win-border:       #404040;
    --win-border-focus: #50A0E0;
    
    --card-bg:          #2C2C2C;
    --card-border:      #404040;
    --card-shadow:      0 4px 8px rgba(0,0,0,0.25), 0 0 1px rgba(255,255,255,0.1);
    
    --text-main:        #FFFFFF;
    --text-muted:       #A0A0A0;
}

/* ── Reset / Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

body {
    font-family: 'Segoe UI Variable', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--win-bg);
    color: var(--text-main);
    font-size: 0.875rem;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ── Root wrapper ─────────────────────────────────────── */
#wrapper {
    display: flex;
    min-height: 100vh;
    width: 100%;
    overflow: hidden;
}

/* ── Sidebar (Windows NavigationView) ─────────────────── */
#sidebar-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-w);
    background: var(--sidebar-bg);
    /* Mica material simulation */
    background: linear-gradient(180deg,
        rgba(240,240,240,0.95) 0%,
        rgba(245,245,245,0.97) 100%);
    border-right: 1px solid var(--sidebar-border);
    z-index: 1040;
    overflow-y: auto;
    overflow-x: hidden;
    transition: width 0.2s cubic-bezier(0.4,0,0.2,1),
                transform 0.2s cubic-bezier(0.4,0,0.2,1);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

/* Thin scrollbar */
#sidebar-wrapper::-webkit-scrollbar { width: 3px; }
#sidebar-wrapper::-webkit-scrollbar-track { background: transparent; }
#sidebar-wrapper::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }

/* Sidebar brand */
.sidebar-brand {
    padding: 14px 16px 12px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
    border-bottom: 1px solid var(--win-border);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    letter-spacing: -0.01em;
    min-height: var(--navbar-h);
}
.sidebar-brand .brand-icon {
    width: 28px; height: 28px;
    background: var(--win-accent);
    border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    font-size: 0.85rem;
    flex-shrink: 0;
}

/* Section labels */
.sidebar-section-title {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--sidebar-muted);
    padding: 16px 16px 4px;
    font-weight: 600;
}

/* Nav links */
#sidebar-wrapper .nav-link {
    color: var(--sidebar-text);
    padding: 7px 12px;
    margin: 1px 8px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.84rem;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.15s ease, color 0.15s ease;
    white-space: nowrap;
    text-decoration: none;
    position: relative;
    border: 1px solid transparent;
}

#sidebar-wrapper .nav-link i {
    font-size: 1rem;
    flex-shrink: 0;
    width: 20px;
    text-align: center;
    color: var(--sidebar-muted);
    transition: color 0.15s;
}

#sidebar-wrapper .nav-link:hover {
    background: var(--sidebar-hover);
    color: var(--text-main);
    border-color: rgba(0,0,0,0.03);
}
#sidebar-wrapper .nav-link:hover i { color: var(--win-accent); }

#sidebar-wrapper .nav-link.active {
    background: var(--sidebar-active-bg);
    color: var(--win-accent);
    font-weight: 600;
    border-color: transparent;
}
#sidebar-wrapper .nav-link.active i { color: var(--win-accent); }
/* Left accent bar for active item */
#sidebar-wrapper .nav-link.active::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--win-accent);
    border-radius: 0 3px 3px 0;
}

/* Dropdown group */
.sidebar-dropdown-group { margin-bottom: 2px; }
.sidebar-dropdown-group > button {
    border: none;
    background: transparent;
    cursor: pointer;
}
.sidebar-dropdown-group > button .sidebar-chevron {
    font-size: 0.65rem;
    transition: transform 0.2s ease;
    margin-left: auto;
    color: var(--sidebar-muted);
}
.sidebar-dropdown-group > button[aria-expanded="true"] .sidebar-chevron {
    transform: rotate(180deg);
}
.nav-link-sub {
    padding-left: 40px !important;
    font-size: 0.82rem !important;
    font-weight: 400 !important;
    color: #3A3A3A !important;
    margin: 1px 8px !important;
}
.nav-link-sub.active {
    font-weight: 600 !important;
    color: var(--win-accent) !important;
    background: var(--sidebar-active-bg) !important;
}

/* ── Page content wrapper ─────────────────────────────── */
#page-content-wrapper {
    margin-left: var(--sidebar-w);
    width: calc(100% - var(--sidebar-w));
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.2s cubic-bezier(0.4,0,0.2,1),
                width 0.2s cubic-bezier(0.4,0,0.2,1);
    overflow-x: hidden;
}

/* Sidebar collapsed */
body.sidebar-collapsed #sidebar-wrapper {
    transform: translateX(calc(-1 * var(--sidebar-w)));
}
body.sidebar-collapsed #page-content-wrapper {
    margin-left: 0;
    width: 100%;
}

/* ── Top Navbar (Windows TitleBar style) ──────────────── */
.top-navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(243,243,243,0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--win-border);
    min-height: var(--navbar-h);
    padding: 0 16px;
    box-shadow: var(--shadow-2);
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

/* Navbar search — Windows style */
.search-container .form-control {
    background: rgba(255,255,255,0.85);
    border: 1px solid var(--win-border);
    border-radius: var(--radius-sm);
    font-size: 0.83rem;
    height: 32px;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.search-container .form-control:focus {
    border-color: var(--win-accent);
    box-shadow: 0 0 0 1px var(--win-accent);
    background: #fff;
}

/* ── Main content area ────────────────────────────────── */
.main-content {
    flex: 1 1 auto;
    padding: 20px 24px 32px;
    width: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

/* ── Cards (Fluent "Layer" cards) ─────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
}

.card-header {
    background: #FAFAFA;
    border-bottom: 1px solid var(--card-border);
    padding: 14px 18px;
    font-weight: 600;
    border-radius: var(--card-radius) var(--card-radius) 0 0 !important;
    font-size: 0.875rem;
}
.card-body { padding: 18px; }
.card-footer {
    background: #FAFAFA;
    border-top: 1px solid var(--card-border);
    padding: 12px 18px;
    border-radius: 0 0 var(--card-radius) var(--card-radius) !important;
}

/* ── Stat / KPI Cards ─────────────────────────────────── */
.stat-card {
    border-radius: var(--card-radius);
    padding: 18px 20px;
    transition: box-shadow 0.18s ease, transform 0.18s ease;
    border: 1px solid var(--card-border);
    background: #FFFFFF;
}
.stat-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-8);
}

.stat-icon {
    width: 40px; height: 40px;
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.15rem;
}

/* ── Tables (Windows DataGrid style) ─────────────────── */
.table {
    margin-bottom: 0;
    font-size: 0.855rem;
    width: 100%;
}
.table thead th {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    background: #FAFAFA;
    border-bottom: 1px solid var(--win-border);
    padding: 10px 14px;
    white-space: nowrap;
    letter-spacing: 0;
    text-transform: none;
}
.table td {
    padding: 10px 14px;
    vertical-align: middle;
    color: var(--text-main);
    border-bottom: 1px solid #F0F0F0;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: rgba(0,120,212,0.04); }
/* Row selection effect */
.table tbody tr { transition: background 0.1s; }

/* ── Badges ───────────────────────────────────────────── */
.badge {
    font-size: 0.73rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    letter-spacing: 0;
}

/* ── Buttons (WinUI control style) ───────────────────── */
.btn {
    font-weight: 500;
    border-radius: var(--radius-sm);
    font-size: 0.855rem;
    transition: background 0.1s ease, box-shadow 0.1s ease, border-color 0.1s ease;
}
.btn-sm { font-size: 0.8rem; padding: 4px 12px; }
.btn-primary {
    background: var(--win-accent);
    border-color: var(--win-accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--win-accent-dark);
    border-color: var(--win-accent-dark);
}
.btn-outline-primary {
    color: var(--win-accent);
    border-color: var(--win-accent);
}
.btn-outline-primary:hover {
    background: var(--win-accent-bg);
    color: var(--win-accent);
    border-color: var(--win-accent);
}
/* WinUI "Subtle" button */
.btn-light {
    background: rgba(0,0,0,0.03);
    border-color: rgba(0,0,0,0.08);
    color: var(--text-main);
}
.btn-light:hover {
    background: rgba(0,0,0,0.07);
    border-color: rgba(0,0,0,0.12);
}

/* Rounded pill override — keep for certain buttons */
.rounded-pill { border-radius: 100px !important; }

/* ── Forms (WinUI TextBox / ComboBox style) ───────────── */
.form-control, .form-select {
    border-radius: var(--radius-sm);
    border: 1px solid #ACACAC;
    font-size: 0.875rem;
    padding: 6px 10px;
    background: #FFFFFF;
    transition: border-color .15s ease, box-shadow .15s ease;
    color: var(--text-main);
}
.form-control:focus, .form-select:focus {
    border-color: var(--win-accent);
    box-shadow: 0 0 0 1px var(--win-accent);
    outline: none;
}
/* Bottom accent line on focus — WinUI TextBox style */
.form-control:focus {
    border-bottom: 2px solid var(--win-accent);
    padding-bottom: 5px;
}
.form-label {
    font-weight: 500;
    font-size: 0.84rem;
    color: #242424;
    margin-bottom: 4px;
}

/* ── Page header ──────────────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}
.page-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
    line-height: 1.3;
}
.page-subtitle {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0;
}

/* ── Alert Cards ──────────────────────────────────────── */
.action-alert-card {
    border-left: 3px solid var(--win-warning) !important;
    background: #FFFBF0;
}
.action-alert-card.danger { border-left-color: var(--win-danger) !important; background: #FDF3F2; }
.action-alert-card.info   { border-left-color: var(--win-info)   !important; background: #EFF6FF; }

/* ── Flash Alerts (WinUI InfoBar style) ───────────────── */
.alert {
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    border: 1px solid transparent;
}
.alert-success {
    background: #DFF6DD;
    color: #107C10;
    border-color: #C8E6C9;
}
.alert-danger {
    background: #FDE7E9;
    color: #C42B1C;
    border-color: #F8C4C2;
}
.alert-info {
    background: #EFF6FF;
    color: #0078D4;
    border-color: #CCE4F7;
}
.alert-warning {
    background: #FFF4CE;
    color: #7A5E00;
    border-color: #FFE7A0;
}

/* ── Dropdown menus (Fluent CommandFlyout) ─────────────── */
.dropdown-menu {
    border: 1px solid var(--win-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-16);
    font-size: 0.855rem;
    padding: 4px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}
.dropdown-item {
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    font-weight: 400;
    transition: background 0.1s;
    color: var(--text-main);
}
.dropdown-item:hover {
    background: rgba(0,120,212,0.08);
    color: var(--win-accent);
}
.dropdown-item:active {
    background: rgba(0,120,212,0.14);
    color: var(--win-accent);
}
.dropdown-divider { border-color: var(--win-border); margin: 4px 0; }

/* ── Modal (Fluent Dialog style) ──────────────────────── */
.modal-content {
    border-radius: var(--radius-xl);
    border: 1px solid var(--win-border);
    box-shadow: var(--shadow-16);
}
.modal-header {
    border-bottom: 1px solid var(--win-border);
    padding: 16px 20px;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.modal-body { padding: 20px; }
.modal-footer {
    border-top: 1px solid var(--win-border);
    padding: 12px 20px;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ── Empty state ──────────────────────────────────────── */
.empty-state { padding: 48px 24px; text-align: center; }
.empty-state-icon { font-size: 2.5rem; color: #A0A0A0; margin-bottom: 16px; display: block; }

/* ── Scrollbar (main content) ─────────────────────────── */
.main-content::-webkit-scrollbar { width: 6px; }
.main-content::-webkit-scrollbar-track { background: transparent; }
.main-content::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.12);
    border-radius: 3px;
}

/* ── Table-responsive overflow fix ───────────────────────*/
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ── Simple DataTables override ───────────────────────── */
.dataTable-wrapper .dataTable-bottom,
.dataTable-wrapper .dataTable-top {
    padding: 10px 16px;
    background: #FAFAFA;
    font-size: 0.82rem;
}
.dataTable-pagination a {
    border-radius: var(--radius-sm) !important;
    border: 1px solid var(--win-border) !important;
    color: #1A1A1A !important;
}
.dataTable-pagination a.active, .dataTable-pagination a:hover {
    background: var(--win-accent) !important;
    color: #fff !important;
    border-color: var(--win-accent) !important;
}

/* ── Responsive: mobile ───────────────────────────────── */
@media (max-width: 991.98px) {
    #sidebar-wrapper {
        transform: translateX(calc(-1 * var(--sidebar-w)));
    }
    #page-content-wrapper {
        margin-left: 0;
        width: 100%;
    }
    body.sidebar-open #sidebar-wrapper {
        transform: translateX(0);
    }
    .main-content { padding: 16px 14px 24px; }
}

/* ── WinUI "Reveal Highlight" micro-interactions ─────── */
.stat-card, .card { position: relative; overflow: hidden; }

/* ── Pill/Tag badge variant ───────────────────────────── */
.badge.win-tag {
    background: rgba(0,120,212,0.10);
    color: var(--win-accent);
    border: 1px solid rgba(0,120,212,0.2);
    border-radius: var(--radius-sm);
    font-weight: 500;
}

/* ── Focus ring (accessibility) ───────────────────────── */
*:focus-visible {
    outline: 2px solid var(--win-accent);
    outline-offset: 2px;
}