/* new_main.css (Dark Mode Version) */
@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;700&family=Roboto+Mono:wght@400;500&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons+Outlined');

:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --primary-color: #8ab4f8; /* Ein helleres Blau für besseren Kontrast auf dunklem Grund */
    --on-primary-color: #121212;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --border-color: #3c4043;
    --hover-color: #282a2d;

    --font-sans: 'Google Sans', 'Roboto', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
}

html, body {
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-color);
    font-family: var(--font-sans);
    color: var(--text-primary);
}

.main-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    grid-template-rows: 100vh;
    height: 100vh;
}

#left-column {
    background-color: var(--surface-color);
    height: 100vh;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.left-column-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.site-header {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
}

#nav-search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    margin-top: 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 0.9rem;
}
#nav-search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(138, 180, 248, 0.2);
}

#sidenav {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem;
}
#sidenav::-webkit-scrollbar { width: 6px; }
#sidenav::-webkit-scrollbar-track { background: transparent; }
#sidenav::-webkit-scrollbar-thumb { background: #444; border-radius: 3px; }

#sidenav .category-header {
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 1.5rem 1rem 0.5rem;
    letter-spacing: 0.5px;
}

#sidenav .subcategory-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: var(--text-secondary);
    font-weight: 500;
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}

#sidenav .subcategory-item:hover {
    background-color: var(--hover-color);
    color: var(--text-primary);
}

#sidenav .subcategory-item.active {
    background-color: var(--primary-color);
    color: var(--on-primary-color);
    font-weight: 700;
}

#content-pane {
    overflow-y: auto;
    padding: 2rem 3rem;
    background-color: var(--bg-color);
}
#content-pane::-webkit-scrollbar { width: 6px; }
#content-pane::-webkit-scrollbar-track { background: transparent; }
#content-pane::-webkit-scrollbar-thumb { background: #444; border-radius: 3px; }


.section-header {
    margin-bottom: 2rem;
}
.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}
.section-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    max-width: 65ch;
}

.download-card {
    display: block;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.download-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    border-color: var(--primary-color);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}
.card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--hover-color);
    border-radius: 50%;
    color: var(--primary-color);
}
.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}
.card-description {
    font-size: 1rem;
    color: var(--text-secondary);
}
.card-footer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.content-placeholder {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    flex-direction: column;
    gap: 1rem;
}
.content-placeholder-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    text-align: center;
}
.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--text-secondary);
    border-bottom-color: var(--primary-color);
    border-radius: 50%;
    animation: rotation 1s linear infinite;
}
@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}