@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0a0f1d;
    --bg-secondary: #121829;
    --bg-glass: rgba(18, 24, 41, 0.7);
    --border-glass: rgba(255, 255, 255, 0.08);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.15);
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --info: #06b6d4;
    --info-bg: rgba(6, 182, 212, 0.1);
    --indigo: #6366f1;
    --indigo-bg: rgba(99, 102, 241, 0.1);
    
    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --sidebar-width: 260px;
    --header-height: 70px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-body);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Premium Layout Grid */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-glass);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    text-decoration: none;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), var(--indigo));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px var(--accent-glow);
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-item a:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.03);
}

.nav-item.active a {
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--accent-glow), rgba(99, 102, 241, 0.05));
    border-left: 3px solid var(--accent);
}

.sidebar-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.logout-btn {
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
}

.logout-btn:hover {
    color: var(--danger);
}

/* Main Area Layout */
.main-content {
    flex-grow: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem 2.5rem;
    width: calc(100% - var(--sidebar-width));
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.page-title {
    font-size: 1.8rem;
    font-weight: 700;
}

.page-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Premium Cards */
.card-glass {
    background-color: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-premium);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.card-glass:hover {
    border-color: rgba(59, 130, 246, 0.25);
    transform: translateY(-2px);
}

/* Executive Dashboard Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    display: flex;
    flex-direction: column;
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.stat-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.stat-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.stat-val {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #ffffff, #cbd5e1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stat-desc .trend-up {
    color: var(--success);
    font-weight: 600;
}

.stat-desc .trend-down {
    color: var(--danger);
    font-weight: 600;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

@media (max-width: 1024px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    min-height: 350px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.5);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.btn-icon-only {
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-size: 0.85rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background-color: var(--success-bg); color: var(--success); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning); }
.badge-danger { background-color: var(--danger-bg); color: var(--danger); }
.badge-info { background-color: var(--info-bg); color: var(--info); }
.badge-indigo { background-color: var(--indigo-bg); color: var(--indigo); }

/* Table overrides and modern DataTables styling */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

table.dataTable {
    width: 100% !important;
    border-collapse: collapse !important;
    margin: 1.5rem 0 !important;
}

table.dataTable thead th {
    background-color: rgba(255, 255, 255, 0.02) !important;
    color: var(--text-secondary) !important;
    font-family: var(--font-heading) !important;
    font-weight: 600 !important;
    font-size: 0.85rem !important;
    text-transform: uppercase !important;
    letter-spacing: 0.05em !important;
    padding: 1rem !important;
    border-bottom: 1px solid var(--border-glass) !important;
}

table.dataTable tbody td {
    padding: 1rem !important;
    border-bottom: 1px solid var(--border-glass) !important;
    font-size: 0.9rem !important;
    color: var(--text-primary) !important;
    background: transparent !important;
}

table.dataTable tbody tr:hover td {
    background-color: rgba(255, 255, 255, 0.02) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    background-color: rgba(255, 255, 255, 0.03) !important;
    border: 1px solid var(--border-glass) !important;
    color: var(--text-secondary) !important;
    border-radius: var(--radius-sm) !important;
    padding: 0.4rem 0.8rem !important;
    transition: var(--transition) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current, 
.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--accent) !important;
    color: white !important;
    border-color: var(--accent) !important;
}

.dataTables_wrapper .dataTables_filter input, 
.dataTables_wrapper .dataTables_length select {
    background-color: var(--bg-secondary) !important;
    border: 1px solid var(--border-glass) !important;
    border-radius: var(--radius-sm) !important;
    padding: 0.4rem 0.8rem !important;
    color: white !important;
    outline: none !important;
}

.dataTables_wrapper .dataTables_filter input:focus {
    border-color: var(--accent) !important;
}

/* Forms controls */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.9rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.1);
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(5, 8, 17, 0.85);
    backdrop-filter: blur(8px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-dialog {
    width: 90%;
    max-width: 550px;
    z-index: 210;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-glass);
}

.modal-body {
    padding: 1.5rem 0;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-glass);
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
}

.close-modal:hover {
    color: white;
}

/* Login View Styling */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.12), transparent),
                radial-gradient(circle at bottom left, rgba(6, 182, 212, 0.12), transparent),
                var(--bg-primary);
}

.login-card {
    width: 100%;
    max-width: 420px;
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo .brand {
    justify-content: center;
    margin-bottom: 0.5rem;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 2rem;
}

/* Error messages alert */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-danger {
    background-color: var(--danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger);
}