:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --background-color: #ffffff;
    --panel-background: #f8fbfe;
    --border-color: #e0e0e0;
    --text-color: #333333;
    --text-light-color: #7f8c8d;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.vpk-unpacker-frontend {
    font-family: var(--font-family);
    width: 100%;
    padding: 40px;
    background-color: var(--background-color);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.07);
    color: var(--text-color);
    box-sizing: border-box;
}

.vpk-unpacker-header {
    text-align: center;
    margin-bottom: 30px;
}

.vpk-unpacker-title {
    color: var(--secondary-color);
    font-size: 2em;
    font-weight: 600;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin-bottom: 10px;
}

.section-title {
    margin-bottom: 18px;
    color: var(--secondary-color);
    font-size: 1.25em;
    font-weight: 600;
}

.vpk-tool-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
}

.vpk-tool-section {
    background-color: var(--panel-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
}

#file-drop-zone,
#pack-drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px 28px;
    text-align: center;
    cursor: pointer;
    background-color: #ffffff;
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}

#file-drop-zone.dragover,
#pack-drop-zone.dragover {
    background-color: #f8f9fa;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

#file-drop-zone .file-drop-zone-content .main-text,
#pack-drop-zone .file-drop-zone-content .main-text {
    margin: 10px 0 5px;
    font-size: 1.2em;
    color: var(--text-color);
    font-weight: 600;
}

#file-drop-zone .file-drop-zone-content .sub-text,
#pack-drop-zone .file-drop-zone-content .sub-text {
    margin: 0;
    font-size: 1em;
    color: var(--text-light-color);
    line-height: 1.6;
}

.icon-container {
    margin-bottom: 20px;
}

.upload-icon {
    width: 50px;
    height: 50px;
    color: var(--primary-color);
}

.vpk-unpacker-frontend button {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 18px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95em;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.vpk-unpacker-frontend button:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.vpk-unpacker-frontend button:active {
    transform: translateY(0);
}

#progressContainer,
#packProgressContainer {
    margin-top: 20px;
}

#progressBar,
#packProgressBar {
    width: 100%;
    height: 12px;
    -webkit-appearance: none;
    appearance: none;
    border-radius: 6px;
    overflow: hidden;
    background-color: #ecf0f1;
}

#progressBar::-webkit-progress-bar,
#packProgressBar::-webkit-progress-bar {
    background-color: #ecf0f1;
}

#progressBar::-webkit-progress-value,
#packProgressBar::-webkit-progress-value {
    background-color: var(--success-color);
}

#progressBar::-moz-progress-bar,
#packProgressBar::-moz-progress-bar {
    background-color: var(--success-color);
}

#commonMessages {
    margin-top: 0;
}

#commonMessages .notice {
    padding: 15px;
    margin-top: 0;
    border-radius: 8px;
    border: 1px solid transparent;
    text-align: center;
}

#commonMessages .notice-error {
    background-color: #fbeae5;
    border-color: var(--error-color);
    color: #c0392b;
}

#commonMessages .notice-success {
    background-color: #eafaf1;
    border-color: var(--success-color);
    color: #27ae60;
}

#commonMessages .notice-info {
    background-color: #eef6fc;
    border-color: var(--primary-color);
    color: #2c6ea3;
}

.task-results-container {
    margin-top: 28px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    background-color: #fcfcfd;
}

.task-results-header {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 18px;
}

.task-results-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.empty-state {
    padding: 24px;
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    color: var(--text-light-color);
    text-align: center;
    background-color: #ffffff;
}

.task-card {
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 18px;
    background-color: #ffffff;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
}

.task-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.task-card-headline {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    min-width: 0;
}

.task-title-group {
    min-width: 0;
}

.task-title {
    font-size: 1.05em;
    font-weight: 600;
    color: var(--secondary-color);
    word-break: break-word;
}

.task-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    margin-top: 6px;
    color: var(--text-light-color);
    font-size: 0.9em;
}

.task-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.task-card-actions button {
    background-color: #000000;
}

.task-card-actions button:hover {
    background-color: #1f1f1f;
}

.task-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 72px;
    min-height: 40px;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.95em;
    font-weight: 600;
    color: #ffffff;
    background-color: #000000;
    box-sizing: border-box;
}

.task-message {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 0.95em;
}

.task-message-processing,
.task-message-packing {
    background-color: #eef6fc;
    color: #2c6ea3;
}

.task-message-done,
.task-message-ready {
    background-color: #eafaf1;
    color: #239b56;
}

.task-message-error {
    background-color: #fbeae5;
    color: #c0392b;
}

.task-tree {
    margin-top: 14px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    background-color: #fdfdfd;
}

.empty-task-tree {
    margin: 0;
    color: var(--text-light-color);
}

.dir-entry {
    margin-bottom: 10px;
}

.dir-header {
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.dir-header:hover {
    background-color: #f0f0f0;
}

.dir-entry:nth-child(odd) > .dir-header,
.file-entry:nth-child(odd) {
    background-color: #f9f9f9;
}

.dir-entry:nth-child(even) > .dir-header,
.file-entry:nth-child(even) {
    background-color: #ffffff;
}

.dir-content {
    padding-left: 25px;
    display: none;
}

.file-entry {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.file-entry a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.file-entry a:hover {
    color: #2980b9;
    text-decoration: underline;
}

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

.vpk-unpacker-frontend button.preview-btn {
    margin-left: 10px;
    padding: 2px 6px;
    font-size: 0.75em;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    visibility: hidden;
    opacity: 0;
    transition: all 0.2s ease-in-out;
    font-weight: normal;
    transform: none;
}

.file-entry:hover button.preview-btn {
    visibility: visible;
    opacity: 1;
}

.vpk-unpacker-frontend button.preview-btn:hover {
    background-color: #34495e;
    transform: none;
}

.preview-modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.55);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.preview-modal-content {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 12px;
    max-width: 80%;
    max-height: 80%;
    overflow: auto;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.preview-modal-content pre {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
}

@media (max-width: 960px) {
    .vpk-tool-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .vpk-unpacker-frontend {
        padding: 24px;
    }

    #file-drop-zone,
    #pack-drop-zone {
        padding: 28px 20px;
    }

    .task-card-header {
        flex-direction: column;
    }

    .task-card-actions {
        width: 100%;
        justify-content: stretch;
    }
}