/* Shared CSS for Kube PDF Tools */
.kube-pdf-tool {
    --bg-body: #f8fafc;
    --primary: var(--primary-color, #0ea5e9);
    --primary-hover: var(--primary-color-dark, #0284c7);
    --text-main: var(--text-color, #1e293b);
    --text-muted: var(--text-muted, #64748b);
    --border: var(--border-color, #e2e8f0);
    --bg-card: #ffffff;
    --surface-hover: rgba(14, 165, 233, 0.08);
    --focus-ring: rgba(14, 165, 233, 0.16);
    color: var(--text-main);
}

body.theme-dark .kube-pdf-tool {
    --bg-body: #020617;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #334155;
    --bg-card: #0f172a;
    --surface-hover: rgba(14, 165, 233, 0.14);
    --focus-ring: rgba(14, 165, 233, 0.26);
}

.kube-pdf-tool .tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
    padding-bottom: 100px;
}

.kube-pdf-tool .tool-header {
    text-align: center;
    margin-bottom: 40px;
}

.kube-pdf-tool .tool-header h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--heading-color, #1e293b);
}

.kube-pdf-tool .tool-header p {
    color: var(--text-main);
}

/* Upload Zone */
.kube-pdf-tool .upload-zone {
    border: 2px dashed var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    margin-bottom: 30px;
}

.kube-pdf-tool .upload-zone:hover,
.kube-pdf-tool .upload-zone.is-dragging {
    border-color: var(--primary);
    background: var(--surface-hover);
}

.kube-pdf-tool .upload-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
    display: block;
}

.kube-pdf-tool .upload-btn {
    background: var(--primary);
    color: #fff;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    margin-top: 15px;
    cursor: pointer;
    display: inline-block;
    transition: background-color 0.2s;
}

.kube-pdf-tool .upload-btn:hover {
    background: var(--primary-hover);
}

/* Pages Grid */
.kube-pdf-tool .pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.kube-pdf-tool .pages-grid.hidden {
    display: none;
}

.kube-pdf-tool .page-card {
    background: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border: 2px solid transparent;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
    aspect-ratio: 1/1.4;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.kube-pdf-tool .page-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.kube-pdf-tool .page-card.selected {
    border-color: var(--primary);
    background-color: var(--surface-hover);
}

.kube-pdf-tool .check-icon {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 24px;
    height: 24px;
    background: var(--primary);
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transform: scale(0);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.kube-pdf-tool .page-card.selected .check-icon {
    transform: scale(1);
}

.kube-pdf-tool .page-preview {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    overflow: hidden;
}

.kube-pdf-tool .page-preview canvas {
    width: 100%;
    height: auto;
    display: block;
}

.kube-pdf-tool .page-loading {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.kube-pdf-tool .page-number {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-main);
    padding: 4px 0;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* Action Bar */
.kube-pdf-tool .action-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--bg-card);
    padding: 15px 40px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transform: translateY(110%);
    transition: transform 0.3s ease;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.kube-pdf-tool .action-bar.visible {
    transform: translateY(0);
}

.kube-pdf-tool .download-btn {
    background: var(--primary);
    color: #fff;
    padding: 12px 24px;
    border-radius: 10px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: opacity 0.2s, background-color 0.2s;
    text-decoration: none;
}

.kube-pdf-tool .download-btn:hover {
    background: var(--primary-hover);
}

.kube-pdf-tool .download-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--text-muted);
}

/* Result Area */
.kube-pdf-tool .result-native {
    display: none;
    margin-top: 20px;
    text-align: center;
    padding: 20px;
    background: #ecfdf5;
    border-radius: 12px;
    color: #065f46;
    border: 1px solid #d1fae5;
}

.kube-pdf-tool .result-native:not(.hidden) {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1024px) {
    .kube-pdf-tool .tool-container {
        padding: 28px 16px 120px;
    }

    .kube-pdf-tool .upload-zone {
        padding: 2.25rem 1.25rem;
    }

    .kube-pdf-tool .action-bar {
        padding: 12px 16px;
        gap: 12px;
    }
}

@media (max-width: 768px) {
    .kube-pdf-tool .tool-header {
        margin-bottom: 24px;
    }

    .kube-pdf-tool .tool-header h1 {
        font-size: 1.6rem;
        line-height: 1.2;
    }

    .kube-pdf-tool .tool-header p {
        font-size: 0.95rem;
    }

    .kube-pdf-tool .upload-zone {
        border-radius: 14px;
        padding: 1.75rem 1rem;
    }

    .kube-pdf-tool .upload-icon {
        font-size: 2.2rem;
    }

    .kube-pdf-tool .pages-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 12px;
    }

    .kube-pdf-tool .action-bar {
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
    }

    .kube-pdf-tool .download-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 520px) {
    .kube-pdf-tool .tool-container {
        padding: 22px 12px 110px;
    }

    .kube-pdf-tool .pages-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .kube-pdf-tool .page-number {
        font-size: 0.75rem;
    }
}

/* Utility Helpers */
.hidden {
    display: none !important;
}

/* Config Cards (for inputs like rotation angle, watermark text) */
.kube-pdf-tool .config-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.kube-pdf-tool .config-group {
    margin-bottom: 15px;
}

.kube-pdf-tool .config-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.kube-pdf-tool .config-input,
.kube-pdf-tool .config-select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
}

.kube-pdf-tool .config-input:focus,
.kube-pdf-tool .config-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* Dark Theme Adaption */
body.theme-dark .kube-pdf-tool .tool-header h1 {
    color: #f8fafc;
}

body.theme-dark .kube-pdf-tool .tool-header p,
body.theme-dark .kube-pdf-tool .selection-info,
body.theme-dark .kube-pdf-tool .page-loading,
body.theme-dark .kube-pdf-tool .config-label {
    color: var(--text-muted);
}

body.theme-dark .kube-pdf-tool .upload-zone,
body.theme-dark .kube-pdf-tool .page-card,
body.theme-dark .kube-pdf-tool .config-card,
body.theme-dark .kube-pdf-tool .file-item {
    background: var(--bg-card);
    border-color: var(--border);
    box-shadow: 0 10px 24px rgba(2, 6, 23, 0.28);
}

body.theme-dark .kube-pdf-tool .upload-zone h3,
body.theme-dark .kube-pdf-tool .upload-zone p,
body.theme-dark .kube-pdf-tool .file-item .file-name {
    color: var(--text-main);
}

body.theme-dark .kube-pdf-tool .page-preview {
    background: #0b1220;
}

body.theme-dark .kube-pdf-tool .page-number {
    background: rgba(15, 23, 42, 0.92);
    color: var(--text-main);
    border-top-color: rgba(148, 163, 184, 0.2);
}

body.theme-dark .kube-pdf-tool .action-bar {
    background: #0b1220;
    border-top-color: var(--border);
    box-shadow: 0 -12px 24px rgba(2, 6, 23, 0.4);
}

body.theme-dark .kube-pdf-tool .download-btn:disabled {
    background: #475569;
}

body.theme-dark .kube-pdf-tool .result-native {
    background: rgba(6, 78, 59, 0.18);
    color: #a7f3d0;
    border-color: rgba(16, 185, 129, 0.3);
}

body.theme-dark .kube-pdf-tool .config-input,
body.theme-dark .kube-pdf-tool .config-select {
    background: #0b1220;
    color: var(--text-main);
    border-color: var(--border);
}

body.theme-dark .kube-pdf-tool .file-item .action-btn {
    color: var(--text-muted);
}

body.theme-dark .kube-pdf-tool .file-item .action-btn:hover {
    background: #1e293b;
    color: var(--text-main);
}

body.theme-dark .kube-pdf-tool .file-item .action-btn.delete:hover {
    background: rgba(127, 29, 29, 0.4);
    color: #fca5a5;
}