/* ============================================
   Archive Viewer & Opener - archive-viewer.css
   Prefix: isv- (archive file viewer)
   Light mode default, dark mode via [data-theme="dark"]
   Green theme - compression/archive category
   ============================================ */

/* CSS Variables - Light Mode (Default) */
:root {
    --isv-transition: 0.25s;

    /* Primary - green (compression/archive tools) */
    --isv-primary: #339966;
    --isv-primary-light: #d1fae5;
    --isv-primary-dark: #2d7a52;

    /* Secondary functional colors */
    --isv-folder: #d97706;
    --isv-folder-light: #fef3c7;
    --isv-success: #339966;
    --isv-success-light: #d1fae5;
    --isv-warning: #d97706;
    --isv-warning-light: #fef3c7;
    --isv-danger: #b91c1c;
    --isv-danger-light: #fee2e2;
    --isv-info: #2563eb;
    --isv-info-light: #dbeafe;

    /* Surfaces */
    --isv-bg: #f7fbf9;
    --isv-bg-elevated: #ffffff;
    --isv-bg-secondary: #f0f9f4;
    --isv-bg-tertiary: #e0f2e8;
    --isv-bg-canvas: #fafafa;

    /* Text */
    --isv-text: #1f2937;
    --isv-text-secondary: #374151;
    --isv-text-muted: #6b7280;

    /* Borders */
    --isv-border: #c8e6d4;
    --isv-border-light: #e0f2e8;

    /* Radius */
    --isv-radius-sm: 6px;
    --isv-radius-md: 10px;
    --isv-radius-lg: 14px;
    --isv-radius-xl: 18px;
}

/* Dark Mode */
[data-theme="dark"] {
    --isv-primary: #4ade80;
    --isv-primary-light: rgba(74, 222, 128, 0.15);
    --isv-primary-dark: #22c55e;

    --isv-folder: #fbbf24;
    --isv-folder-light: rgba(251, 191, 36, 0.15);
    --isv-success: #4ade80;
    --isv-success-light: rgba(74, 222, 128, 0.15);
    --isv-warning: #fbbf24;
    --isv-warning-light: rgba(251, 191, 36, 0.15);
    --isv-danger: #f87171;
    --isv-danger-light: rgba(248, 113, 113, 0.15);
    --isv-info: #60a5fa;
    --isv-info-light: rgba(96, 165, 250, 0.15);

    --isv-bg: #0f1a14;
    --isv-bg-elevated: #16241c;
    --isv-bg-secondary: #1c2e23;
    --isv-bg-tertiary: #25382c;
    --isv-bg-canvas: #131e18;

    --isv-text: #f3f4f6;
    --isv-text-secondary: #d1d5db;
    --isv-text-muted: #9ca3af;

    --isv-border: #2a4233;
    --isv-border-light: #1f3327;
}

/* ============================================
   GLOBAL OVERRIDES (custom_styles.css cascade)
   ============================================ */
* { box-sizing: border-box; }

/* tool-main has overflow: hidden globally - tool needs visible for overlays */
.tool-main { overflow: visible !important; }

/* Neutralize the global .upload-area::before gradient overlay
   (custom_styles.css adds it; the dashed border should be the only visual cue) */
.isv-upload-area::before,
.isv-upload-area::after {
    display: none !important;
    content: none !important;
}

.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.25rem;
}

.tool-header { text-align: center; margin-bottom: 2rem; }

.tool-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin: 0 0 0.75rem;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--isv-primary);
}
.tool-title i { color: var(--isv-primary); }

.tool-description {
    max-width: 800px;
    margin: 0 auto;
    color: var(--isv-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}
.tool-description a {
    color: var(--isv-primary);
    text-decoration: none;
    font-weight: 500;
}
.tool-description a:hover { text-decoration: underline; }

/* ============================================
   MAIN AREA
   ============================================ */
.isv-tool-main {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0;
    overflow: visible !important;
}

/* ============================================
   UPLOAD SECTION
   ============================================ */
.isv-upload-section {
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-xl);
    padding: 2rem;
}

.isv-upload-area {
    border: 2px dashed var(--isv-border);
    border-radius: var(--isv-radius-lg);
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--isv-transition), background var(--isv-transition), box-shadow var(--isv-transition);
    background: var(--isv-bg-secondary);
    position: relative;
    overflow: hidden; /* clip any rogue pseudo-elements from global styles */
    outline: none;    /* kill default browser focus outline that ignores border-radius */
}

.isv-upload-area:hover {
    border-color: var(--isv-primary);
    background: var(--isv-primary-light);
}
.isv-upload-area:focus-visible {
    border-color: var(--isv-primary);
    border-style: solid;
    box-shadow: 0 0 0 4px var(--isv-primary-light);
}
.isv-upload-area.dragover {
    border-color: var(--isv-primary);
    border-style: solid;
    background: var(--isv-primary-light);
    box-shadow: 0 0 0 4px var(--isv-primary-light);
}

.isv-upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.isv-upload-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--isv-primary);
    margin-bottom: 0.5rem;
}

.isv-upload-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--isv-text);
}

.isv-upload-subtitle {
    margin: 0 0 0.75rem;
    color: var(--isv-text-muted);
    font-size: 0.9rem;
}

.isv-file-types {
    display: inline-flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    margin: 0.5rem 0;
}

.isv-file-type-badge {
    padding: 0.25rem 0.65rem;
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: 9999px;
    color: var(--isv-primary);
    font-size: 0.75rem;
    font-weight: 600;
}

.isv-upload-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--isv-text-muted);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}
.isv-upload-hint i { color: var(--isv-success); }

/* ============================================
   VIEWER SECTION
   ============================================ */
.isv-viewer-section {
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-xl);
    padding: 1.5rem;
}

/* Archive header info */
.isv-archive-info {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--isv-border-light);
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.isv-archive-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--isv-radius-md);
    background: var(--isv-primary-light);
    color: var(--isv-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.isv-archive-meta {
    flex: 1;
    min-width: 200px;
}

.isv-archive-name {
    font-weight: 600;
    color: var(--isv-text);
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.isv-archive-stats {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 0.25rem;
}

.isv-stat {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--isv-text-muted);
    font-size: 0.8rem;
}
.isv-stat i { color: var(--isv-text-muted); }

.isv-archive-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ============================================
   BREADCRUMBS
   ============================================ */
.isv-breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.3rem;
    padding: 0.5rem 0.75rem;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    margin-bottom: 0.75rem;
}

.isv-breadcrumb-item {
    display: inline-flex !important;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.7rem !important;
    background: transparent !important;
    border: none !important;
    border-radius: var(--isv-radius-sm) !important;
    color: var(--isv-text-muted) !important;
    font-size: 0.85rem !important;
    font-weight: 500 !important;
    cursor: pointer;
    transition: all var(--isv-transition);
    box-shadow: none !important;
    transform: none !important;
}
.isv-breadcrumb-item:hover {
    background: var(--isv-bg-tertiary) !important;
    color: var(--isv-text) !important;
    transform: none !important;
}
.isv-breadcrumb-item.active {
    color: var(--isv-primary) !important;
}

.isv-breadcrumb-sep {
    color: var(--isv-text-muted);
    font-size: 0.8rem;
    user-select: none;
}

/* ============================================
   SELECTION BAR
   ============================================ */
.isv-selection-bar {
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    background: var(--isv-primary-light);
    border: 1px solid var(--isv-primary);
    border-radius: var(--isv-radius-md);
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.isv-selection-info {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--isv-primary-dark);
    font-weight: 600;
    font-size: 0.88rem;
    min-width: 0;
}
.isv-selection-info i { color: var(--isv-primary-dark); flex-shrink: 0; }

[data-theme="dark"] .isv-selection-info { color: var(--isv-primary); }
[data-theme="dark"] .isv-selection-info i { color: var(--isv-primary); }

.isv-selection-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ============================================
   FILE CHECKBOX - scoped overrides for the global
   custom_styles.css blue/20px checkbox rule
   ============================================ */
.isv-file-checkbox {
    appearance: auto !important;
    -webkit-appearance: auto !important;
    width: 18px !important;
    height: 18px !important;
    margin: 0 !important;
    margin-right: 0 !important;
    accent-color: var(--isv-primary);
    border: 1px solid var(--isv-border) !important;
    background: var(--isv-bg-elevated) !important;
    cursor: pointer;
    flex-shrink: 0;
}
.isv-file-checkbox:checked {
    background: var(--isv-primary) !important;
    border-color: var(--isv-primary) !important;
}

/* ============================================
   TOOLBAR
   ============================================ */
.isv-toolbar {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    margin-bottom: 0.85rem;
    flex-wrap: wrap;
}

.isv-toolbar > .isv-btn { flex-shrink: 0; }

.isv-search-wrapper {
    position: relative;
    flex: 1;
    min-width: 200px;
    display: flex;
    align-items: center;
}

.isv-search-wrapper > i:first-child {
    position: absolute;
    left: 12px;
    color: var(--isv-text-muted);
    pointer-events: none;
}

.isv-search-input {
    width: 100%;
    padding: 0.55rem 2.25rem 0.55rem 2.25rem;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    color: var(--isv-text);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--isv-transition);
}
.isv-search-input:focus {
    border-color: var(--isv-primary);
}

.isv-search-clear {
    position: absolute;
    right: 8px;
    background: transparent !important;
    border: none !important;
    color: var(--isv-text-muted) !important;
    cursor: pointer;
    width: 24px;
    height: 24px;
    border-radius: var(--isv-radius-sm) !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 !important;
    box-shadow: none !important;
    transform: none !important;
}
.isv-search-clear:hover {
    background: var(--isv-bg-tertiary) !important;
    transform: none !important;
}

.isv-view-toggle {
    display: inline-flex;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    padding: 2px;
    gap: 2px;
    flex-shrink: 0;
}

.isv-view-btn {
    background: transparent !important;
    border: none !important;
    padding: 0.4rem 0.6rem !important;
    color: var(--isv-text-muted) !important;
    border-radius: var(--isv-radius-sm) !important;
    cursor: pointer;
    transition: all var(--isv-transition);
    box-shadow: none !important;
    transform: none !important;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
}
.isv-view-btn.active {
    background: var(--isv-bg-elevated) !important;
    color: var(--isv-primary) !important;
}
.isv-view-btn:hover { transform: none !important; }

/* ============================================
   FILE LIST
   ============================================ */
.isv-file-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    min-height: 200px;
    max-height: 600px;
    overflow-y: auto;
    padding: 0.25rem;
}

/* List view */
.isv-file-list.isv-list-view .isv-file-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.65rem 0.85rem;
    border-radius: var(--isv-radius-md);
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border-light);
    cursor: pointer;
    transition: all var(--isv-transition);
    min-width: 0;
}
.isv-file-list.isv-list-view .isv-file-item:hover {
    background: var(--isv-bg-tertiary);
    border-color: var(--isv-border);
}
.isv-file-list.isv-list-view .isv-file-item.selected {
    background: var(--isv-primary-light);
    border-color: var(--isv-primary);
}

.isv-file-list.isv-list-view .isv-file-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--isv-radius-sm);
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--isv-text-muted);
}
.isv-file-list.isv-list-view .isv-file-icon.folder {
    background: var(--isv-folder-light);
    color: var(--isv-folder);
    border-color: var(--isv-folder);
}

/* Critical: flex:1 + min-width:0 so long names truncate instead of blowing out */
.isv-file-list.isv-list-view .isv-file-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.isv-file-list.isv-list-view .isv-file-name {
    font-weight: 500;
    color: var(--isv-text);
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.isv-file-list.isv-list-view .isv-file-meta {
    font-size: 0.78rem;
    color: var(--isv-text-muted);
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.isv-file-list.isv-list-view .isv-file-actions {
    display: flex;
    gap: 0.35rem;
    flex-shrink: 0;
}

.isv-file-action-btn {
    background: transparent !important;
    border: 1px solid var(--isv-border) !important;
    width: 32px;
    height: 32px;
    padding: 0 !important;
    border-radius: var(--isv-radius-sm) !important;
    color: var(--isv-text-muted) !important;
    cursor: pointer;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    transition: all var(--isv-transition);
    box-shadow: none !important;
    transform: none !important;
}
.isv-file-action-btn:hover {
    background: var(--isv-primary) !important;
    color: #ffffff !important;
    border-color: var(--isv-primary) !important;
    transform: none !important;
}

/* Grid view */
.isv-file-list.isv-grid-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
}

.isv-file-list.isv-grid-view .isv-file-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem 0.5rem;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border-light);
    border-radius: var(--isv-radius-md);
    cursor: pointer;
    transition: all var(--isv-transition);
    min-width: 0;
    gap: 0.5rem;
}
.isv-file-list.isv-grid-view .isv-file-item:hover {
    background: var(--isv-bg-tertiary);
    border-color: var(--isv-primary);
}

.isv-file-list.isv-grid-view .isv-file-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--isv-radius-md);
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--isv-text-muted);
}
.isv-file-list.isv-grid-view .isv-file-icon.folder {
    background: var(--isv-folder-light);
    color: var(--isv-folder);
    border-color: var(--isv-folder);
}

.isv-file-list.isv-grid-view .isv-file-info {
    width: 100%;
    min-width: 0;
}
.isv-file-list.isv-grid-view .isv-file-name {
    font-weight: 500;
    color: var(--isv-text);
    font-size: 0.82rem;
    word-break: break-all;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.3;
}
.isv-file-list.isv-grid-view .isv-file-meta {
    font-size: 0.7rem;
    color: var(--isv-text-muted);
    margin-top: 2px;
}
.isv-file-list.isv-grid-view .isv-file-actions {
    display: flex;
    gap: 0.3rem;
}

/* Empty state */
.isv-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    color: var(--isv-text-muted);
    text-align: center;
    gap: 0.5rem;
}
.isv-empty-state p { margin: 0; font-size: 0.9rem; }

/* ============================================
   STAGE PROCESSING OVERLAY
   ============================================ */
.isv-processing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.isv-processing-card {
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-lg);
    padding: 1.5rem 1.75rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    min-width: 340px;
    max-width: 440px;
    width: 100%;
}

.isv-stage-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    gap: 4px;
}

.isv-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
}

.isv-stage-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    color: var(--isv-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    transition: background var(--isv-transition), color var(--isv-transition), border-color var(--isv-transition);
}

.isv-stage.active .isv-stage-dot {
    background: var(--isv-primary);
    border-color: var(--isv-primary);
    color: #ffffff;
}

.isv-stage.done .isv-stage-dot {
    background: var(--isv-success);
    border-color: var(--isv-success);
    color: #ffffff;
}

.isv-stage-label {
    font-size: 0.72rem;
    color: var(--isv-text-muted);
    font-weight: 500;
}
.isv-stage.active .isv-stage-label { color: var(--isv-primary); font-weight: 600; }
.isv-stage.done .isv-stage-label { color: var(--isv-success); }

.isv-stage-connector {
    flex: 1;
    height: 2px;
    background: var(--isv-border);
    max-width: 28px;
    transition: background var(--isv-transition);
}
.isv-stage-connector.done { background: var(--isv-success); }

.isv-progress-bar-wrapper {
    width: 100%;
    height: 8px;
    background: var(--isv-bg-secondary);
    border-radius: var(--isv-radius-sm);
    overflow: hidden;
    margin-bottom: 0.6rem;
}

.isv-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--isv-primary);
    border-radius: var(--isv-radius-sm);
    transition: width 0.3s ease;
}

.isv-progress-meta {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
}

.isv-progress-percent {
    font-weight: 700;
    color: var(--isv-primary);
    font-size: 0.95rem;
}

.isv-progress-text {
    color: var(--isv-text-muted);
    font-size: 0.85rem;
    text-align: right;
    flex: 1;
    min-width: 0;
}

/* ============================================
   ERROR CONTAINER
   ============================================ */
.isv-error-container {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.15rem;
    background: var(--isv-danger-light);
    border: 1px solid var(--isv-danger);
    border-radius: var(--isv-radius-md);
    color: var(--isv-danger);
    font-size: 0.9rem;
    line-height: 1.55;
    margin-top: 1.25rem;
}

.isv-error-container a {
    color: var(--isv-danger);
    font-weight: 600;
    text-decoration: underline;
}

.isv-error-close {
    background: transparent !important;
    border: none !important;
    color: inherit !important;
    cursor: pointer;
    padding: 0.2rem !important;
    margin-left: auto;
    border-radius: var(--isv-radius-sm) !important;
    box-shadow: none !important;
    transform: none !important;
}
.isv-error-close:hover { background: rgba(185, 28, 28, 0.15) !important; transform: none !important; }

/* ============================================
   PASSWORD MODAL
   ============================================ */
.isv-password-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.isv-password-card {
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-lg);
    padding: 1.5rem 1.75rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    min-width: 340px;
    max-width: 440px;
    width: 100%;
}

.isv-password-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--isv-text);
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}
.isv-password-header i { color: var(--isv-warning); }

.isv-password-card p {
    margin: 0 0 1rem;
    color: var(--isv-text-muted);
    font-size: 0.88rem;
    line-height: 1.55;
}

.isv-password-input {
    width: 100%;
    padding: 0.65rem 0.9rem;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    color: var(--isv-text);
    font-size: 0.95rem;
    outline: none;
    margin-bottom: 1rem;
    transition: border-color var(--isv-transition);
}
.isv-password-input:focus { border-color: var(--isv-primary); }

.isv-password-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* ============================================
   FILE PREVIEW MODAL
   ============================================ */
.isv-preview-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 8000;
}

.isv-preview {
    position: fixed;
    top: 5%;
    left: 50%;
    transform: translateX(-50%);
    width: 92%;
    max-width: 900px;
    max-height: 90vh;
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-lg);
    z-index: 8100;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    overflow: hidden;
}

.isv-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.15rem;
    border-bottom: 1px solid var(--isv-border-light);
    gap: 1rem;
    flex-shrink: 0;
}

.isv-preview-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--isv-text);
    min-width: 0;
}
.isv-preview-title span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.isv-preview-title i { color: var(--isv-primary); flex-shrink: 0; }

.isv-preview-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.isv-preview-close {
    background: transparent !important;
    border: 1px solid var(--isv-border) !important;
    color: var(--isv-text-muted) !important;
    cursor: pointer;
    padding: 0.4rem !important;
    border-radius: var(--isv-radius-sm) !important;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    box-shadow: none !important;
    transform: none !important;
}
.isv-preview-close:hover {
    background: var(--isv-bg-tertiary) !important;
    color: var(--isv-text) !important;
    transform: none !important;
}

.isv-preview-body {
    flex: 1;
    overflow: auto;
    padding: 1rem;
    background: var(--isv-bg-canvas);
}

.isv-preview-body pre {
    margin: 0;
    padding: 1rem;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border-light);
    border-radius: var(--isv-radius-md);
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--isv-text);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 70vh;
    overflow: auto;
}

.isv-preview-body img {
    max-width: 100%;
    max-height: 70vh;
    display: block;
    margin: 0 auto;
    background: #ffffff;
    border-radius: var(--isv-radius-sm);
}

.isv-preview-unsupported {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 3rem 1rem;
    color: var(--isv-text-muted);
    text-align: center;
}
.isv-preview-unsupported i { color: var(--isv-text-muted); }

/* ============================================
   BUTTONS (custom_styles overrides require !important)
   ============================================ */
.isv-btn {
    display: inline-flex !important;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1rem !important;
    border-radius: var(--isv-radius-md) !important;
    font-size: 0.88rem !important;
    font-weight: 600 !important;
    cursor: pointer;
    transition: all var(--isv-transition);
    border: 1px solid transparent !important;
    line-height: 1;
    box-shadow: none !important;
    text-decoration: none;
}
.isv-btn:hover { transform: translateY(-1px); }

.isv-btn-primary {
    background: var(--isv-primary) !important;
    color: #ffffff !important;
    border-color: var(--isv-primary) !important;
}
.isv-btn-primary:hover {
    background: var(--isv-primary-dark) !important;
    border-color: var(--isv-primary-dark) !important;
    color: #ffffff !important;
}

.isv-btn-success {
    background: var(--isv-success) !important;
    color: #ffffff !important;
    border-color: var(--isv-success) !important;
}
.isv-btn-success:hover {
    filter: brightness(0.92);
    color: #ffffff !important;
}

.isv-btn-secondary {
    background: var(--isv-bg-secondary) !important;
    color: var(--isv-text-secondary) !important;
    border-color: var(--isv-border) !important;
}
.isv-btn-secondary:hover {
    background: var(--isv-bg-tertiary) !important;
    color: var(--isv-text) !important;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.isv-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.7rem 1rem;
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--isv-text);
    z-index: 10000;
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    max-width: 340px;
}
.isv-toast.show { transform: translateY(0); opacity: 1; }
.isv-toast.success i { color: var(--isv-success); }
.isv-toast.error { color: var(--isv-danger); }
.isv-toast.error i { color: var(--isv-danger); }

/* ============================================
   RELATED TOOLS
   ============================================ */
.isv-related-tools { margin: 1.75rem 0; }

.isv-related-tools-box {
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    padding: 1rem 1.15rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.isv-related-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    color: var(--isv-text-secondary);
    font-size: 0.85rem;
}
.isv-related-label i { color: var(--isv-primary); }

.isv-related-links { display: inline-flex; gap: 0.5rem; flex-wrap: wrap; }

.isv-related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    border-radius: 9999px;
    color: var(--isv-text-secondary);
    text-decoration: none;
    font-size: 0.83rem;
    font-weight: 500;
    transition: all var(--isv-transition);
}
.isv-related-link:hover {
    background: var(--isv-primary);
    border-color: var(--isv-primary);
    color: #ffffff;
}
.isv-related-link i { flex-shrink: 0; }

/* ============================================
   INFO SECTIONS
   ============================================ */
.isv-info-sections {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.isv-info-card {
    background: var(--isv-bg-elevated);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-lg);
    padding: 1.5rem;
}

.isv-info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin: 0 0 0.9rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--isv-text);
}
.isv-info-card h2 i { color: var(--isv-primary); }

.isv-info-card p {
    margin: 0.6rem 0;
    line-height: 1.7;
    color: var(--isv-text-secondary);
    font-size: 0.92rem;
}

.isv-info-card a {
    color: var(--isv-primary);
    text-decoration: none;
    font-weight: 500;
}
.isv-info-card a:hover { text-decoration: underline; }

.isv-info-card ol,
.isv-info-card ul {
    margin: 0.6rem 0;
    padding-left: 1.4rem;
    line-height: 1.75;
    color: var(--isv-text-secondary);
}
.isv-info-card li { margin: 0.4rem 0; }
.isv-steps-list strong { color: var(--isv-text); }

/* Steps - numbered green circles matching the GZ viewer's polished pattern */
.isv-steps {
    display: grid;
    gap: 14px;
    margin: 0.6rem 0;
}
.isv-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}
.isv-step-num {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--isv-primary);
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}
.isv-step-content { min-width: 0; }
.isv-step-content h3 {
    margin: 0 0 4px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--isv-text);
}
.isv-step-content p {
    margin: 0;
    color: var(--isv-text-secondary);
    line-height: 1.65;
}

/* Features grid - icon containers with light-green background */
.isv-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.85rem;
    margin-top: 0.5rem;
}

.isv-feature-item {
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    padding: 1rem;
    min-width: 0;
}
.isv-feature-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--isv-primary-light);
    color: var(--isv-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}
.isv-feature-icon i,
.isv-feature-icon svg { width: 18px; height: 18px; }
.isv-feature-item > i { color: var(--isv-primary); margin-bottom: 0.5rem; } /* legacy fallback */
.isv-feature-item h4 {
    margin: 0 0 0.35rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--isv-text);
}
.isv-feature-item p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--isv-text-muted);
    line-height: 1.55;
}

/* ============================================
   FAQ - global _footer.php handler with .faq-item.open
   ============================================ */
.isv-info-card .faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.isv-info-card .faq-item {
    background: var(--isv-bg-secondary);
    border: 1px solid var(--isv-border);
    border-radius: var(--isv-radius-md);
    overflow: hidden;
}

.isv-info-card .faq-question {
    width: 100%;
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 1.05rem !important;
    background: transparent !important;
    border: none !important;
    cursor: pointer;
    text-align: left;
    color: var(--isv-text) !important;
    font-weight: 600;
    font-size: 0.92rem;
    box-shadow: none !important;
    transform: none !important;
    transition: background var(--isv-transition);
}
.isv-info-card .faq-question:hover {
    background: var(--isv-bg-tertiary) !important;
    transform: none !important;
}
.isv-info-card .faq-question i {
    color: var(--isv-primary);
    transition: transform var(--isv-transition);
    flex-shrink: 0;
}
.isv-info-card .faq-item.open .faq-question i { transform: rotate(180deg); }

.isv-info-card .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--isv-transition) ease;
    padding: 0 1.05rem;
}
.isv-info-card .faq-item.open .faq-answer {
    max-height: 500px;
    padding: 0 1.05rem 0.95rem;
}
.isv-info-card .faq-answer p {
    margin: 0;
    color: var(--isv-text-secondary);
    font-size: 0.88rem;
    line-height: 1.65;
}
.isv-info-card .faq-answer strong { color: var(--isv-text); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .tool-container { padding: 1rem 0.75rem; }
    .tool-title { font-size: 1.4rem; }
    .tool-description { font-size: 0.9rem; }

    .isv-upload-section { padding: 1.25rem; }
    .isv-upload-area { padding: 2rem 1rem; }
    .isv-upload-title { font-size: 1.1rem; }

    .isv-viewer-section { padding: 1.15rem; }

    .isv-archive-info { gap: 0.6rem; }
    .isv-archive-actions { width: 100%; }
    .isv-archive-actions .isv-btn { flex: 1; justify-content: center; min-width: 0; }
    .isv-archive-actions .isv-btn span { display: none; }

    .isv-stage-connector { max-width: 18px; }
    .isv-stage-label { font-size: 0.65rem; }
    .isv-processing-card { padding: 1.25rem 1rem; min-width: 0; }

    .isv-info-card { padding: 1.15rem; }
    .isv-info-card h2 { font-size: 1.1rem; }

    .isv-preview { width: 96%; top: 2%; max-height: 96vh; }
    .isv-preview-actions span { display: none; }

    .isv-file-list { max-height: 500px; }
}

@media (max-width: 480px) {
    .isv-archive-stats { gap: 0.6rem; }
    .isv-file-list.isv-list-view .isv-file-item { padding: 0.55rem 0.65rem; gap: 0.6rem; }
    .isv-file-list.isv-list-view .isv-file-icon { width: 32px; height: 32px; }
    .isv-related-tools-box { padding: 0.85rem; }
}