:root {
    --bg-primary: #12141c;
    --bg-secondary: #1a1d28;
    --bg-card: #222634;
    --bg-card-hover: #2a2f42;
    --accent: #5e81ac;
    --accent-hover: #81a1c1;
    --danger: #bf616a;
    --danger-hover: #d08770;
    --success: #a3be8c;
    --text-main: #eceff4;
    --text-muted: #99a1b3;
    --border: #2e3440;
    --border-hover: #4c566a;
    --radius: 10px;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-area {
    display: flex;
    flex-direction: column;
}

.archive-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.archive-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Buttons */
.btn {
    background-color: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.btn-primary {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-danger {
    background-color: rgba(191, 97, 106, 0.15);
    color: var(--danger);
    border-color: rgba(191, 97, 106, 0.3);
}

.btn-danger:hover {
    background-color: var(--danger);
    color: #fff;
}

.view-toggle {
    display: flex;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.view-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 8px 12px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.view-btn.active {
    background-color: var(--bg-card);
    color: var(--text-main);
}

/* Main Container */
main {
    flex: 1;
    padding: 24px;
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Breadcrumbs */
.breadcrumb-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    background-color: var(--bg-secondary);
    padding: 12px 18px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.breadcrumb-item {
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}

.breadcrumb-item:hover {
    color: var(--text-main);
}

.breadcrumb-item.active {
    color: var(--accent-hover);
    font-weight: 600;
    cursor: default;
}

.breadcrumb-sep {
    color: var(--border-hover);
}

/* Sections */
.section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Preview / Grid View */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    display: flex;
    flex-direction: column;
    position: relative;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--border-hover);
    background-color: var(--bg-card-hover);
}

.card-thumb {
    width: 100%;
    height: 150px;
    object-fit: cover;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-folder-icon {
    font-size: 48px;
    color: var(--accent);
}

.card-info {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.card-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}

.card-delete {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(18, 20, 28, 0.7);
    border: none;
    color: var(--danger);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
}

.card:hover .card-delete {
    opacity: 1;
}

.card-delete:hover {
    background: var(--danger);
    color: #fff;
}

/* List View */
.table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

th, td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:last-child td {
    border-bottom: none;
}

tbody tr {
    cursor: pointer;
    transition: background-color 0.15s;
}

tbody tr:hover {
    background-color: var(--bg-card-hover);
}

.file-row-icon {
    width: 24px;
    text-align: center;
    color: var(--accent);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    padding: 24px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 20px;
    transform: translateY(20px);
    transition: transform 0.2s;
}

.modal-overlay.open .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 20px;
}

.modal-close:hover {
    color: var(--text-main);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.modal-option-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 10px;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
}

.modal-option-btn:hover, .modal-option-btn.active {
    border-color: var(--accent);
    background-color: var(--bg-card-hover);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    color: var(--text-muted);
}

.form-control {
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 14px;
    color: var(--text-main);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: var(--accent);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 12, 16, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s;
}

.lightbox.open {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 4px;
    transition: transform 0.1s ease;
    user-select: none;
}

.lightbox-content video {
    max-width: 100%;
    max-height: 85vh;
    border-radius: 4px;
    outline: none;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 2010;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.25);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 2010;
}

.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.25);
}

.lightbox-prev {
    left: 30px;
}

.lightbox-next {
    right: 30px;
}

.lightbox-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    color: var(--text-main);
    z-index: 2010;
}

/* Empty state */
.empty-state {
    padding: 60px;
    text-align: center;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.empty-state svg {
    width: 64px;
    height: 64px;
    color: var(--border-hover);
}