/**
 * File Manager - Mini Cloud UI Styles
 * Grid-based file explorer with thumbnails and category filters
 */

/* Container */
.file-manager-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
    border-radius: 8px;
}

/* Filter Bar */
.file-filter-bar {
    display: flex;
    gap: 10px;
    padding: 0;
    background: transparent;
    flex-wrap: wrap;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: transparent;
    border: 1px solid var(--border-color, #444);
    border-radius: 26px;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
}

.filter-btn:hover {
    background: transparent;
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-count {
    background: var(--accent-dim);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.filter-btn.active .filter-count {
    background: rgba(0, 0, 0, 0.2);
}

/* Upload Zone */
.upload-zone {
    position: relative;
    padding: 40px;
    background: var(--bg-panel);
    border: dashed 2px var(--border);
    border-radius: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-zone:hover {
    border-color: var(--accent);
    background: transparent;
}

.upload-zone.drag-over {
    border-color: var(--accent);
    background: rgba(0, 188, 212, 0.1);
    transform: scale(1.02);
}

.upload-zone-content i {
    font-size: 20px;
    color: var(--accent);
    margin-bottom: 15px;
}

.upload-title {
    font-size: 16px;
    color: var(--text-primary, #fff);
    margin-bottom: 8px;
}

.upload-link {
    color: var(--accent);
    text-decoration: underline;
    cursor: pointer;
}

.upload-subtitle {
    font-size: 13px;
    color: var(--text-muted);
}

/* File Grid */
.file-grid-container {
    min-height: 300px;
    overflow-y: auto;
    height: fit-content;
    border: solid 1px var(--border);
    border-radius: 16px;
    padding: 10px;
    max-height: 50vh;
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.file-grid-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.file-grid-empty i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.1;
}

.file-grid-empty p {
    font-size: 16px;
    opacity: 0.3;
}

/* File Card */
.file-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--bg-tertiary);
    border: solid 1px var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.2s ease;
    cursor: pointer;
}

.file-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 188, 212, 0.2);
}

/* Thumbnail */
.file-thumbnail {
    width: 100%;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    overflow: hidden;
}

.file-thumbnail.image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-thumbnail.icon {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-tertiary) 100%);
}

.file-thumbnail.icon i {
    font-size: 64px;
    color: var(--accent);
    opacity: 0.6;
}

/* File Info */
.file-card-info {
    padding: 12px;
    flex: 1;
}

.file-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

.file-category-badge {
    padding: 3px 8px;
    border-radius: 30px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.file-category-badge.foto {
    background: rgba(76, 175, 80, 0.2);
    color: #4CAF50;
}

.file-category-badge.planimetrie {
    background: rgba(33, 150, 243, 0.2);
    color: #2196F3;
}

.file-category-badge.documenti {
    background: rgba(255, 152, 0, 0.2);
    color: #FF9800;
}

.file-category-badge.quiz_audio {
    background: rgba(156, 39, 176, 0.2);
    color: #9C27B0;
}

/* Vault (Encrypted) Documents */
.file-category-badge.vault {
    background: var(--warning);
    color: var(--text-secondary);
}

.file-size {
    margin-left: auto;
}

/* Entity reference link for vault docs */
.file-entity-ref {
    color: var(--accent);
    opacity: 0.7;
    font-size: 11px;
}

.file-entity-ref:hover {
    opacity: 1;
}

/* ========================================
   VAULT DOCUMENT CARD STYLES
   ======================================== */

/* Vault filter button special styling */
.filter-btn-vault {
    border-color: var(--color-warning);
}

.filter-btn-vault:hover {
    border-color: var(--warning);
    background: var(--warning);
    color: var(--text-secondary);
}

.filter-btn-vault.active {
    background: var(--warning);
    border-color: transparent;
}

/* Vault document card */
.file-card-vault {
    border-color: var(--warning);
}

.file-card-vault:hover {
    border-color: var(--warning);
    box-shadow: var(--shadow-sm);
}

/* Vault thumbnail with lock badge */
.vault-thumbnail {
    position: relative;
    background: linear-gradient(135deg, rgba(233, 30, 99, 0.1) 0%, rgba(156, 39, 176, 0.1) 100%);
}

.vault-thumbnail i {
    color: var(--text-secondary);
    opacity: 0.8 !important;
}

.vault-lock-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--warning);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(233, 30, 99, 0.4);
}

.vault-lock-badge i {
    font-size: 12px !important;
    color: var(--text-secondary) !important;
    opacity: 1 !important;
}

/* Vault action buttons */
.file-card-vault .file-action-btn.view:hover {
    background: var(--accent);
    border-color: transparent;
}

.file-card-vault .file-action-btn.download:hover {
}

/* File Actions */
.file-card-actions {
    display: flex;
    gap: 4px;
    padding: 8px;
    background: transparent;
    border-top: solid 1px var(--border);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.file-card:hover .file-card-actions {
    opacity: 1;
}

.file-action-btn {
    flex: 1;
    padding: 8px;
    background: transparent;
    border: 1px solid var(--border-color, #444);
    border-radius: 16px;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s ease;
}

.file-action-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-secondary);
}

.file-action-btn.delete:hover {
    background: #f44336;
    border-color: #f44336;
    color: #fff;
}

/* ========================================
   MULTI-SELECT STYLES
   ======================================== */

/* File card needs relative positioning for checkbox overlay */
.file-card {
    position: relative;
}

/* Checkbox overlay - top-left corner */
.file-card-checkbox {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: rgba(0, 0, 0, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.2s ease, background 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
}

.file-card-checkbox i {
    font-size: 12px;
    color: #fff;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.file-card:hover .file-card-checkbox {
    opacity: 1;
}

.file-card-checkbox.checked {
    opacity: 1;
    background: var(--accent, #00bcd4);
    border-color: var(--accent, #00bcd4);
}

.file-card-checkbox.checked i {
    opacity: 1;
}

/* Selected card highlight */
.file-card-selected {
    border-color: var(--accent, #00bcd4) !important;
    box-shadow: 0 0 0 2px var(--accent, #00bcd4), 0 4px 16px rgba(0, 188, 212, 0.2) !important;
}

.file-card-selected .file-card-checkbox {
    opacity: 1;
}

/* Floating multi-select action bar */
.file-multiselect-bar {
    position: sticky;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg-panel, #1a1a2e);
    border: 1px solid var(--accent, #00bcd4);
    border-radius: 12px;
    margin-top: 12px;
    z-index: 10;
    animation: multiSelectSlideUp 0.2s ease;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

@keyframes multiSelectSlideUp {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.multiselect-bar-left,
.multiselect-bar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.multiselect-count {
    font-weight: 600;
    color: var(--accent, #00bcd4);
    font-size: 14px;
    white-space: nowrap;
}

.multiselect-btn {
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border-color, #444);
    background: transparent;
    color: var(--text-main, #eee);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.multiselect-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-secondary);
}

.multiselect-btn.delete-selected:hover {
    background: #f44336;
    border-color: #f44336;
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }

    .file-filter-bar {
        flex-direction: column;
    }

    .filter-btn {
        justify-content: space-between;
    }

    /* Fixed bottom sheet — always visible when files are selected */
    .file-multiselect-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        border-radius: 14px 14px 0 0;
        border-left: none;
        border-right: none;
        border-bottom: none;
        margin-top: 0;
        /* Single compact row */
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        flex-wrap: nowrap;
        gap: 8px;
        padding: 14px 16px;
        /* iPhone safe area (notch / home indicator) */
        padding-bottom: max(14px, env(safe-area-inset-bottom));
    }

    .multiselect-bar-left,
    .multiselect-bar-right {
        gap: 8px;
        flex-shrink: 0;
    }

    .multiselect-count {
        font-size: 15px;
        font-weight: 700;
    }

    /* Icon-only circular touch targets */
    .multiselect-btn span {
        display: none;
    }
    .multiselect-btn {
        width: 40px;
        height: 40px;
        min-width: 40px;
        padding: 0;
        justify-content: center;
        border-radius: 50%;
        font-size: 15px;
    }

    /* Download — accent tint */
    .multiselect-btn.download-selected {
        border-color: var(--accent, #00bcd4);
        color: var(--accent, #00bcd4);
    }
    .multiselect-btn.download-selected:active {
        background: var(--accent, #00bcd4);
        color: #fff;
    }

    /* Delete — red tint */
    .multiselect-btn.delete-selected {
        border-color: #f44336;
        color: #f44336;
    }
    .multiselect-btn.delete-selected:active {
        background: #f44336;
        color: #fff;
    }
}