:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #00c6ff;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #3498db;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: #f0f2f5;
    color: var(--dark-color);
    font-size: 0.9rem;
}

.futuristic-title {
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 1px;
}

.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 60px 0 0;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--dark-color) 100%);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.sidebar-sticky {
    position: relative;
    top: 0;
    height: calc(100vh - 60px);
    padding-top: 1rem;
    overflow-x: hidden;
    overflow-y: auto;
}

.navbar-brand {
    padding-top: .75rem;
    padding-bottom: .75rem;
    font-size: 1.1rem;
    font-family: 'Orbitron', sans-serif;
    background-color: rgba(0, 0, 0, .25);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    border-left: 3px solid transparent;
    padding: 0.7rem 1rem;
    margin: 0.2rem 0;
    transition: all 0.3s ease;
    font-size: 0.85rem;
}

.nav-link:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.1);
    border-left: 3px solid var(--accent-color);
}

.nav-link.active {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.15);
    border-left: 3px solid var(--accent-color);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.card-header {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-bottom: none;
    padding: 1rem 1.5rem;
}

.btn {
    border-radius: 5px;
    font-weight: 500;
    padding: 0.4rem 1rem;
    transition: all 0.3s ease;
    font-size: 0.85rem;
}

.btn-primary {
    background: linear-gradient(90deg, var(--secondary-color) 0%, var(--accent-color) 100%);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(90deg, var(--accent-color) 0%, var(--secondary-color) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.badge {
    padding: 0.5em 0.8em;
    border-radius: 4px;
}

.table {
    border-collapse: separate;
    border-spacing: 0;
}

.table th {
    background-color: rgba(0, 0, 0, 0.03);
    border-top: none;
    font-weight: 500;
}

.table td, .table th {
    padding: 0.75rem;
    vertical-align: middle;
    font-size: 0.85rem;
}

.form-control, .form-select {
    border-radius: 5px;
    padding: 0.5rem 0.9rem;
    border: 1px solid #e0e0e0;
    font-size: 0.85rem;
}

.form-control:focus, .form-select:focus {
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.25);
    border-color: var(--secondary-color);
}

/* Modal Styling */
.modal-content {
    border: none;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.modal-header {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-bottom: none;
    border-radius: 10px 10px 0 0;
}

.modal-footer {
    border-top: none;
}

/* KPI Card Styling */
.kpi-card {
    border-radius: 10px;
    padding: 15px;
    color: white;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.kpi-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.kpi-card .kpi-value {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: 'Orbitron', sans-serif;
}

.kpi-card .kpi-label {
    font-size: 0.8rem;
    font-weight: 400;
    opacity: 0.9;
}

.kpi-card .kpi-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    opacity: 0.2;
}

.kpi-card.bg-primary { background-color: var(--primary-color) !important; }
.kpi-card.bg-success { background-color: var(--success-color) !important; }
.kpi-card.bg-warning { background-color: var(--warning-color) !important; }
.kpi-card.bg-info { background-color: var(--info-color) !important; }


@media (max-width: 767.98px) {
    .sidebar {
        top: 5rem;
    }
    .futuristic-title.h3 {
        font-size: 1.5rem;
    }
}

/*
 * Korrektur für das Layout mit fester Sidebar.
 * Da die Sidebar `position: fixed` hat, wird sie aus dem normalen Dokumentenfluss entfernt.
 * Der Hauptinhalt (`main`) würde daher unter der Sidebar beginnen.
 * Wir fügen einen linken Rand zum `main`-Element hinzu, der der Breite der Sidebar entspricht.
 * Die Breiten (25% für md, 16.666667% für lg) entsprechen den Bootstrap-Spaltenklassen
 * (col-md-3 und col-lg-2), die für die Sidebar verwendet werden.
 */
@media (min-width: 768px) {
    main.col-md-9 {
        margin-left: 25%;
    }
}

@media (min-width: 992px) {
    main.col-lg-10 {
        margin-left: 16.666667%;
    }
}