:root {
    --bg-dark: #0f172a;
    --bg-panel: #1e293b;
    --bg-hover: #334155;
    --accent: #38bdf8;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100%;
}

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.brand {
    padding: 24px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

nav {
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    padding: 12px 16px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    transition: all 0.2s;
}

.nav-item:hover, .nav-item.active {
    background-color: var(--bg-hover);
    color: var(--text-main);
}

.nav-item.active {
    border-left: 4px solid var(--accent);
}

/* Main Content Styling */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: 70px;
    padding: 0 32px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.breadcrumb-item {
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}

.breadcrumb-item:hover {
    color: var(--accent);
}

.breadcrumb-separator {
    color: var(--border);
}

.search-bar {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-bar input {
    background: transparent;
    border: none;
    color: var(--text-main);
    outline: none;
    width: 200px;
}

/* Grid Ansicht */
.content-area {
    padding: 32px;
    overflow-y: auto;
    flex: 1;
}

.grid-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
}

.item-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    text-decoration: none;
    color: inherit;
}

.item-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    border-color: var(--accent);
}

.item-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.fa-folder { color: #facc15; } /* Gelber Ordner */
.fa-file-code, .fa-file-archive, .fa-box-open { color: var(--accent); } /* Blaue Dateien */

.item-name {
    font-weight: 500;
    margin-bottom: 8px;
    word-break: break-all;
}

.item-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}