/* PDF Merger Styles */
:root {
    --primary-color: #128C7E;
    --primary-dark: #075E54;
    --secondary-color: #25D366;
    --danger-color: #dc3545;
    --success-color: #128C7E;
    --background-light: #f5f6f7;
    --text-dark: #333;
    --text-light: #6c757d;
    --whatsapp-teal: #128C7E;
    --whatsapp-light: #25D366;
}

.pdf-merger-container {
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    margin: 2rem auto;
    max-width: 95%;
    position: relative;
    overflow: hidden;
}

.pdf-merger-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.file-input-zone {
    border: 2px dashed var(--primary-color);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    margin: 1rem 0;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.file-input-zone:hover {
    background-color: #f0f8ff;
    border-color: var(--primary-dark);
}

.file-input-zone i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.file-list {
    margin: 2rem 0;
    max-height: 300px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem;
    background-color: #f8f9fa;
    border-radius: 5px;
    margin-bottom: 0.5rem;
}

.file-item:hover {
    background-color: #e9ecef;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-name {
    font-weight: 500;
    color: var(--text-dark);
}

.file-size {
    color: var(--text-light);
    font-size: 0.9rem;
}

.remove-file {
    color: var(--danger-color);
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 5px;
}

.remove-file:hover {
    background-color: #ffebee;
}

.file-order-controls {
    margin: 1rem 0;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    text-align: center;
}

.file-item.dragging {
    opacity: 0.5;
    border: 2px dashed var(--primary-color);
}

.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
}

.merged-result {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 10px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.merged-result h3 {
    color: var(--success-color);
    margin-bottom: 1rem;
    width: 100%;
}

.download-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.filename-input {
    width: 100%;
    text-align: center;
    margin-bottom: 1rem;
}

.filename-field {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    transition: border-color 0.3s ease;
}

.filename-field:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.filename-hint {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0.5rem 0;
}

.action-button {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.merge-button {
    background-color: var(--primary-color);
    color: white;
}

.merge-button:hover {
    background-color: var(--primary-dark);
}

.download-button {
    background-color: var(--success-color);
    color: white;
}

.download-button:hover {
    background-color: var(--primary-dark);
}

.clear-button {
    background-color: var(--danger-color);
    color: white;
}

.clear-button:hover {
    background-color: #c82333;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background-color: #e9ecef;
    border-radius: 5px;
    margin: 1rem 0;
    display: none;
}

.progress {
    width: 0%;
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 5px;
    transition: width 0.3s ease;
}

.recent-files {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.recent-files-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.clear-recent-button {
    background-color: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.clear-recent-button:hover {
    background-color: var(--danger-color);
    color: white;
}

.recent-files-list {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.recent-file-item {
    position: relative;
    border: 1px solid #e0e0e0;
    transition: all 0.3s ease;
    padding: 1.5rem;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.recent-file-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(18, 140, 126, 0.1);
}

.recent-file-item .merge-count {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.recent-file-item .merge-count i {
    color: var(--secondary-color);
}

.recent-file-item .merge-date {
    font-size: 0.9rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px dashed #e0e0e0;
    padding-bottom: 0.8rem;
}

.recent-file-item .merge-date i {
    color: #6c757d;
}

.recent-file-item .merge-size {
    background-color: #e8f5e9;
    color: #2e7d32;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    align-self: flex-start;
}

.recent-file-item .merge-size i {
    color: #2e7d32;
}

.recent-file-item .files-list {
    background-color: #f8f9fa;
    padding: 0.8rem;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-dark);
    max-height: 80px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) #f0f0f0;
}

.recent-file-item .files-list::-webkit-scrollbar {
    width: 6px;
}

.recent-file-item .files-list::-webkit-scrollbar-track {
    background: #f0f0f0;
    border-radius: 3px;
}

.recent-file-item .files-list::-webkit-scrollbar-thumb {
    background-color: var(--primary-color);
    border-radius: 3px;
}

.delete-recent {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    color: var(--danger-color);
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    background-color: #fff0f0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.delete-recent:hover {
    background-color: var(--danger-color);
    color: white;
    transform: rotate(90deg);
}

.instructions-section {
    margin: 4rem auto;
    max-width: 1000px;
    padding: 2rem;
}

.instruction-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.instruction-card {
    background-color: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

.instruction-card:hover {
    transform: translateY(-5px);
}

.instruction-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.instruction-card h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.tips-section {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 12px;
    margin-top: 3rem;
}

.tips-section ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.tips-section li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
}

.tips-section i {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .pdf-merger-container {
        margin: 1rem;
        padding: 1rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .action-button {
        width: 100%;
    }

    .recent-files-header {
        flex-direction: column;
        gap: 1rem;
    }

    .clear-recent-button {
        width: 100%;
    }
}