.main-header {
    background-color: var(--bg-card);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}
.main-header h1 {
    font-size: 20px;
    margin: 0;
    color: var(--text-primary);
}
.btn-back {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    white-space: nowrap; /* Mencegah teks turun baris */
}
.btn-back:hover {
    color: var(--accent-cyan);
}
.files-page {
    flex-direction: column;
    align-items: stretch;
}
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap; /* Izinkan wrapping jika layar sempit */
    gap: 16px;
}
#searchInput {
    padding: 10px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: white;
    font-size: 16px;
    flex-grow: 1; /* Biarkan search bar membesar */
    min-width: 200px;
}
#totalSizeInfo {
    color: var(--text-secondary);
    white-space: nowrap;
}
.file-groups-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}
.file-group {
    background-color: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}
.file-group-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
}
.file-group-header .count {
    color: var(--text-secondary);
    font-weight: 400;
}
.file-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.file-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}
.file-item:last-child { border-bottom: none; }
.file-details {
    flex-grow: 1;
    overflow: hidden; /* Penting untuk text-overflow */
}
.file-item-name {
    display: block;
    white-space: nowrap; /* Mencegah teks turun baris */
    overflow: hidden; /* Sembunyikan teks yang berlebih */
    text-overflow: ellipsis; /* Tampilkan ... di akhir */
    color: var(--text-primary);
    font-weight: 500;
}
.file-item-meta {
    font-size: 12px;
    color: var(--text-secondary);
}
.file-actions {
    display: flex;
    gap: 8px;
    padding-left: 12px; /* Beri jarak dari nama file */
}
.file-actions a, .file-actions button {
    color: var(--text-secondary);
    background-color: #374151;
    border-radius: 6px;
    padding: 6px;
    display: flex;
    align-items: center;
    border: none;
    cursor: pointer;
}
.file-actions a:hover, .file-actions button:hover {
    color: white;
    background-color: #4b5563;
}
.loading-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px;
    color: var(--text-secondary);
}
.spinner {
    border: 4px solid #f3f3f330;
    border-top: 4px solid var(--accent-cyan);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- BAGIAN BARU: STYLE KHUSUS UNTUK MOBILE --- */
@media (max-width: 768px) {
    .main-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .main-header h1 {
        font-size: 18px;
    }
    .toolbar {
        flex-direction: column;
        align-items: stretch; /* Buat search bar full width */
    }
    .file-groups-container {
        grid-template-columns: 1fr; /* Pastikan hanya 1 kolom */
    }
    .file-item-name {
        /* Tambahkan ini agar nama file yang sangat panjang tidak merusak layout */
        max-width: 200px; /* Sesuaikan nilainya jika perlu */
    }
}