/*================================================
    Root Variables
================================================*/
:root {
    /* Color Scheme */
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-element: #262639;
    --accent-primary: #8c5eff;
    --accent-secondary: #ff67d7;
    --text-primary: #ffffff;
    --text-secondary: #b8b8d0;
    --error-color: #ff4757;
    --success-color: #2ecc71;
    --warning-color: #f1c40f;

    --border-color: rgba(184, 184, 208, 0.15);
    --shadow-color: rgba(0, 0, 0, 0.25);

    /* Typography */
    --font-family: 'Inter', sans-serif;
    --fs-base: clamp(0.9rem, 1.5vw + 0.5rem, 1rem);

    /* Sizing & Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.625rem;
    --radius-lg: 1rem;

    --container-width: 1100px;

    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-base: 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/*================================================
    Base Styles & Reset
================================================*/
*,
*::before,
*::after {
    scrollbar-color: var(--accent-secondary) transparent;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    background-image: radial-gradient(circle at 1% 1%, rgba(140, 94, 255, 0.1) 0%, transparent 50%),
                      radial-gradient(circle at 99% 99%, rgba(255, 103, 215, 0.1) 0%, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--fs-base);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/*================================================
    Layout & Container
================================================*/
.container {
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: var(--spacing-md);
}

/*================================================
    Header
================================================*/
.app-header {
    padding-block: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 15, 26, 0.1);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 600;
}

.logo-icon {
    font-size: 1.2em;
    filter: drop-shadow(0 0 10px var(--accent-primary));
}

.logo-link {
    text-decoration: none;
    color: var(--accent-primary);
}

.tagline {
    color: var(--text-secondary);
    font-size: clamp(0.85rem, 2vw, 0.9rem);
}

/*================================================
    Workstation & View Switcher
================================================*/
.workstation {
    margin: var(--spacing-xl) auto;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 15px 40px var(--shadow-color);
    overflow: hidden;
}

.view-switcher {
    display: flex;
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
}

.switcher-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-grow: 1;
    padding: var(--spacing-md);
    background-color: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.switcher-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.switcher-btn.active {
    color: var(--text-primary);
    background: var(--bg-element);
    box-shadow: inset 0 -3px 0 0 var(--accent-primary);
}

/*================================================
    Views & Content
================================================*/
.view {
    display: none;
    padding: var(--spacing-xl);
    animation: fadeIn 0.5s ease;
}

.view.active-view {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/*================================================
    Drop Zones
================================================*/
.drop-area {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-xl);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.drop-zone-content {
    transition: transform var(--transition-base);
}

.drop-area:hover {
    border-color: var(--accent-primary);
    background-color: rgba(140, 94, 255, 0.1);
}

.drop-area.dragover {
    border-style: solid;
    border-color: var(--accent-secondary);
    background-color: rgba(255, 103, 215, 0.1);
    box-shadow: 0 0 25px rgba(255, 103, 215, 0.3), inset 0 0 15px rgba(255, 103, 215, 0.2);
}

.drop-area.dragover .drop-zone-content {
    transform: scale(1.05);
}

.drop-zone-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
    transition: color var(--transition-base);
}

.drop-area.dragover .drop-zone-icon {
    color: var(--accent-secondary);
}

.drop-zone-text {
    font-size: 1.1rem;
    font-weight: 600;
}

.drop-zone-subtext {
    color: var(--text-secondary);
}

/*================================================
    File List
================================================*/
.file-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-block: var(--spacing-lg);
}

.file-list:empty::before {
    content: 'No files added yet.';
    display: block;
    padding: var(--spacing-xl);
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-align: center;
}

.file-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-element);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.file-item:hover {
    border-color: var(--border-color);
    background-color: #31314a;
    transform: translateY(-2px);
}

.file-icon {
    font-size: 1.5rem;
}

.file-meta {
    overflow: hidden;
    min-width: 0;
}

.file-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.file-size {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.file-actions {
    display: flex;
    gap: 5px;
}

/*================================================
    Forms, Options & Actions
================================================*/
.create-options,
.view-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-md);
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

textarea.form-input {
    font-family: inherit;
    resize: none;
    overflow-y: hidden;
}

#pkgDescription { min-height: 5rem; }
#pkgCustomData { min-height: 6rem; }
#shareUrls { min-height: 7rem; }


.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(140, 94, 255, 0.25);
}

.size-info {
    color: var(--text-secondary);
}

.create-options .form-input {
    width: auto;
    flex: 1 1 150px;
}

.create-options label {
    font-size: 0.9rem;
}

.password-fields-container {
    display: flex;
    gap: var(--spacing-md);
}

.password-fields-container .form-group {
    flex: 1;
}

.password-fields-container .form-input {
    width: 100%;
}

/*================================================
    Metadata & Key Forms
================================================*/
#editFormContainer,
#share-view,
.key-verification {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-element);
    border-radius: var(--radius-md);
}

#share-view {
    padding: var(--spacing-xl);
    background: transparent;
}

#editFormContainer[data-locked="true"] {
    opacity: 0.4;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

#editFormContainer h3,
#share-view h3,
.key-verification h4 {
    margin-bottom: var(--spacing-lg);
}

.key-verification p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.key-verification .form-group {
    flex-direction: row;
    gap: var(--spacing-md);
}

.metadata-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.form-note {
    font-size: 0.85rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

#editEncryptionSection {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/*================================================
    Master Key & Share Link Display
================================================*/
.master-key-area {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: rgba(140, 94, 255, 0.1);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-md);
    text-align: center;
}

.master-key-area h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
}

.master-key-area p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.key-display {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin-inline: auto;
}

.key-display input {
    width: 100%;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 1.1rem;
    text-align: center;
    padding: 0 var(--spacing-sm);
}

#shareLinkArea .key-display input {
    font-family: var(--font-family);
    font-size: 0.95rem;
    text-align: left;
    padding: 0 var(--spacing-md);
}


/*================================================
    Buttons
================================================*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-fast);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-primary {
    background: linear-gradient(90deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: var(--text-primary);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(140, 94, 255, 0.4);
}

.btn-secondary {
    background-color: var(--bg-element);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: #31314a;
    border-color: var(--text-secondary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-danger {
    background-color: var(--error-color);
    color: var(--text-primary);
}

.btn-danger:hover:not(:disabled) {
    background-color: #d63031;
    transform: scale(1.1);
}

.btn-small {
    font-size: 0.8rem;
}

/*================================================
    Progress & Download
================================================*/
.progress-container {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-element);
    border-radius: var(--radius-md);
}

.progress-text {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 99px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width var(--transition-base);
}

.download-area {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
}

.download-area > .download-links-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.download-link {
    display: block;
    padding: var(--spacing-md);
    background-color: rgba(46, 204, 113, 0.1);
    border: 1px solid var(--success-color);
    border-radius: var(--radius-sm);
    color: var(--success-color);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.download-link:hover {
    background-color: var(--success-color);
    color: white;
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.2);
}

.download-link small {
    font-weight: 400;
    opacity: 0.8;
}

/*================================================
    Package Info & Preview
================================================*/
.package-info .file-list {
    margin-top: 0;
}

.package-summary {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-element);
    border-radius: var(--radius-md);
}

.package-summary h3 {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.package-summary h3 .pkg-name {
    color: var(--accent-secondary);
}

.package-description {
    margin-block: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--accent-primary);
    color: var(--text-secondary);
    font-style: italic;
}

.package-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tag {
    padding: 2px 8px;
    background-color: var(--accent-primary);
    border-radius: 99px;
    color: white;
    font-size: 0.8rem;
    font-weight: 500;
}

.package-sources {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.package-sources ul {
    list-style-position: inside;
    padding-left: 0;
    margin-top: var(--spacing-xs);
}

.package-sources a {
    color: var(--accent-secondary);
    text-decoration: none;
}
.package-sources a:hover {
    text-decoration: underline;
}


.package-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    color: var(--text-secondary);
}

.inline-preview-container {
    margin-bottom: var(--spacing-sm);
    background-color: var(--bg-primary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    animation: fadeIn 0.3s ease;
    position: relative;
}

.inline-preview-close-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    z-index: 10;
}

.preview-wrapper {
    position: relative;
    max-height: 50vh;
    border-radius: var(--radius-sm);
    overflow-y: auto;
}

.preview-wrapper img,
.preview-wrapper video,
.preview-wrapper audio {
    margin: var(--spacing-md);
    display: block;
    max-width: 100%;
    max-height: 45vh;
    width: auto;
    height: auto;
    margin-inline: auto;
    border-radius: var(--radius-sm);
    object-fit: contain;
}

.preview-wrapper pre {
    max-height: 45vh;
    margin: 0;
    background: var(--bg-element);
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
    overflow-y: auto;
}

.preview-wrapper pre code {
    padding: var(--spacing-md);
    display: block;
}

.zip-preview-list {
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    text-align: left;
}

.zip-preview-list ul {
    list-style-type: none;
}

.zip-preview-list li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.zip-preview-list li::before {
    content: '📄 ';
    color: var(--accent-primary);
}

.zip-preview-list li.is-dir::before {
    content: '📁 ';
}

.custom-data-container {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--bg-element);
    border-radius: var(--radius-md);
}

.custom-data-container h4 {
    margin-bottom: var(--spacing-md);
}

.custom-data-container pre {
    max-height: 200px;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: var(--radius-sm);
    white-space: pre-wrap;
    word-break: break-all;
    overflow: auto;
}

/*================================================
    Toast Notifications
================================================*/
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    padding: var(--spacing-md);
    background-color: var(--bg-element);
    border-left: 4px solid var(--accent-primary);
    border-radius: var(--radius-sm);
    box-shadow: 0 5px 20px var(--shadow-color);
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.success { border-color: var(--success-color); }
.toast.error   { border-color: var(--error-color); }
.toast.warning { border-color: var(--warning-color); }

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/*================================================
    Utilities & Accessibility
================================================*/
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

:focus-visible {
    outline: 2px solid var(--accent-secondary);
    outline-offset: 2px;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/*================================================
    Responsive Design
================================================*/
@media (max-width: 768px) {
    .metadata-form-grid,
    .package-details-grid {
        grid-template-columns: 1fr;
    }

    .header-container {
        flex-direction: column;
        text-align: center;
    }

    .view {
        padding: var(--spacing-lg);
    }
    
    .file-item {
        grid-template-columns: auto minmax(0, 1fr) auto;
    }
    
    .password-fields-container {
        flex-direction: column;
    }
}