/* =========================================
   PDF MERGE TOOL SPECIFIC CSS
   ========================================= */

/* Tool accent tint (derived from --cat-pdf), adapts to dark mode */
:root {
    --tool-accent-tint: #fef2f2;
}
[data-theme="dark"] {
    --tool-accent-tint: #450a0a;
}

/* Hero Additions (shared pattern) */
.tool-hero {
    padding: 4rem 0 3rem;
    background: radial-gradient(circle at center, var(--bg-light) 0%, var(--bg-main) 100%);
    border-bottom: 1px solid var(--border-color);
}

.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Tool Interface */
.tool-interface-wrapper {
    padding: 2rem 0 4rem;
    background-color: var(--bg-main);
}

.tool-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Upload State Drop Zone */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 4rem 2rem;
    text-align: center;
    background: var(--bg-main);
    transition: all var(--transition-speed);
    cursor: pointer;
    max-width: 800px;
    margin: 0 auto;
}

.drop-zone.dragover {
    background: var(--tool-accent-tint);
    border-color: var(--cat-pdf);
}

.drop-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--tool-accent-tint);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.drop-zone h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    pointer-events: none;
}

.drop-zone p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    pointer-events: none;
}

.upload-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.supported-formats {
    font-size: 0.85rem !important;
    margin-bottom: 0 !important;
    pointer-events: none;
}

/* Buttons */
.btn-primary-tool {
    background: var(--cat-pdf);
    color: #fff;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-speed);
}

.btn-primary-tool:hover {
    background: #dc2626;
}

.btn-primary-tool:disabled {
    background: #cbd5e1;
    cursor: not-allowed;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-speed);
}

.btn-outline:hover {
    background: var(--bg-light);
    border-color: #cbd5e1;
}

/* Workspace Layout */
.workspace-state {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px var(--card-shadow);
    padding: 1.5rem;
}

.workspace-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.workspace-header h4 {
    margin: 0;
    font-size: 1.1rem;
}

.file-count-badge {
    background: var(--cat-pdf);
    color: #fff;
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-weight: 600;
}

.workspace-hint {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* File Grid (Drag to Reorder) */
.pdf-file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    min-height: 80px;
}

.pdf-file-card {
    position: relative;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1rem 0.75rem 0.75rem;
    cursor: grab;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    user-select: none;
}

.pdf-file-card:active {
    cursor: grabbing;
}

.pdf-file-card.dragging {
    opacity: 0.4;
}

.pdf-file-card.drag-over {
    border-color: var(--cat-pdf);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

.pdf-file-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px -4px rgba(0, 0, 0, 0.12);
}

.pdf-card-order {
    position: absolute;
    top: -8px;
    left: -8px;
    width: 24px;
    height: 24px;
    background: var(--cat-pdf);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pdf-card-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

.pdf-card-remove:hover {
    background: var(--cat-pdf);
    color: #fff;
    border-color: var(--cat-pdf);
}

.pdf-card-icon {
    width: 100%;
    aspect-ratio: 3 / 4;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.6rem;
    overflow: hidden;
}

.pdf-card-icon svg {
    color: var(--cat-pdf);
}

.pdf-card-icon canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pdf-card-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pdf-card-meta {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.add-more-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 1.5rem;
}

.workspace-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

/* Processing State */
.processing-state {
    padding: 4rem 2rem;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px var(--card-shadow);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-light);
    border-top: 4px solid var(--cat-pdf);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.progress-bar-container {
    width: 100%;
    max-width: 400px;
    height: 8px;
    background: var(--bg-light);
    border-radius: 4px;
    margin: 1.5rem auto;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--cat-pdf);
    transition: width 0.1s linear;
}

/* Feature/Steps Overrides */
.step-card {
    padding: 2rem 1rem;
}

.step-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    background: var(--tool-accent-tint);
    color: var(--cat-pdf);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    height: 100%;
}

/* Accordion */
.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.accordion-item {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    text-align: left;
    padding: 1.25rem;
    background: none;
    border: none;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-family);
}

.accordion-header svg {
    transition: transform 0.3s ease;
}

.accordion-header[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    padding: 0 1.25rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.accordion-content.open {
    max-height: 600px;
    padding: 0 1.25rem 1.25rem;
}
@media (max-width: 575px) {
    .pdf-file-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    .workspace-actions {
        flex-direction: column-reverse;
    }
    .workspace-actions .btn,
    .workspace-actions .btn-outline,
    .workspace-actions .btn-primary-tool {
        width: 100%;
    }
}