/* Artifact Browser — an h5ai-inspired, read-only artifact browsing UI. */

:root {
    color-scheme: light dark;

    --font-sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

    --bg: #fafafa;
    --bg-elevated: #ffffff;
    --border: #e0e0e0;
    --text: #2b2b2b;
    --text-muted: #737373;
    --accent: #2f6fed;
    --accent-contrast: #ffffff;
    --row-hover: #f0f4ff;
    --row-selected: #dbe6ff;
    --header-bg: #2b2f36;
    --header-text: #f5f5f5;
    --radius: 4px;
    --folder-color: #dfa543;
    --ui-scale: 1;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1c1e22;
        --bg-elevated: #23262b;
        --border: #33363b;
        --text: #e6e6e6;
        --text-muted: #9a9a9a;
        --row-hover: #262b36;
        --row-selected: #26385c;
        --header-bg: #17181b;
        --header-text: #f0f0f0;
    }
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: calc(13px * var(--ui-scale, 1));
}

#app, .app-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    height: 100%;
}

a {
    color: var(--accent);
}

/* Header */
.app-header {
    background: var(--header-bg);
    color: var(--header-text);
    padding: 0.6rem 1rem;
}

.app-header__title {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.app-header__title:focus:not(:focus-visible) {
    outline: none;
}

.app-header__title:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
    padding: 0.4rem 0.75rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
}

.toolbar__group {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.toolbar__btn, .toolbar__select {
    background: var(--bg-elevated);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.3rem 0.55rem;
    font-size: 0.85rem;
    cursor: pointer;
    line-height: 1.2;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.toolbar__group .toolbar__btn {
    border: none;
    border-right: 1px solid var(--border);
    border-radius: 0;
}

.toolbar__group .toolbar__btn:last-child {
    border-right: none;
}

.toolbar__btn:hover, .toolbar__select:hover {
    background: var(--row-hover);
}

.toolbar__btn.is-active {
    background: var(--accent);
    color: var(--accent-contrast);
}

.toolbar__btn:disabled {
    opacity: 0.4;
    cursor: default;
}

.toolbar__btn:disabled:hover {
    background: var(--bg-elevated);
}

.toolbar__zoom-value {
    min-width: 3.2rem;
    justify-content: center;
    font-variant-numeric: tabular-nums;
}

.toolbar__input {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.3rem 0.5rem;
    font-size: 0.85rem;
    background: var(--bg-elevated);
    color: var(--text);
    min-width: 10rem;
}

.toolbar__search {
    display: inline-flex;
    gap: 0.25rem;
}

.toolbar__selection {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-left: 0.25rem;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    padding: 0.45rem 0.9rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
    overflow-x: auto;
    white-space: nowrap;
}

.breadcrumb__segment {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 0.15rem 0.3rem;
    border-radius: var(--radius);
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font: inherit;
}

.breadcrumb__segment:hover {
    background: var(--row-hover);
}

.breadcrumb__home {
    width: 0.9rem;
    height: 0.9rem;
    fill: var(--text-muted);
}

.breadcrumb__sep {
    color: var(--text-muted);
    padding: 0 0.05rem;
}

/* Body layout */
.app-body {
    flex: 1;
    display: flex;
    min-height: 0;
}

.sidebar {
    width: calc(240rem / 13);
    flex-shrink: 0;
    border-right: 1px solid var(--border);
    background: var(--bg-elevated);
    overflow-y: auto;
    padding: 0.5rem 0;
}

.content {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0.25rem 0;
}

.content__split {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.content__split--with-index {
    display: grid;
    grid-template-rows: 1fr 1fr;
}

.content__listing {
    flex: 1;
    min-height: 0;
    overflow: auto;
}

.content__index {
    min-height: 0;
    overflow: auto;
    border-top: 1px solid var(--border);
    padding: 0.9rem 1rem;
    background: var(--bg-elevated);
}

.metadata-panel {
    width: calc(260rem / 13);
    flex-shrink: 0;
    border-left: 1px solid var(--border);
    background: var(--bg-elevated);
    padding: 0.9rem;
    overflow-y: auto;
}

@media (max-width: 900px) {
    .sidebar {
        display: none;
    }

    .metadata-panel {
        display: none;
    }
}

/* Folder tree */
.sidebar__tree ul {
    list-style: none;
    margin: 0;
    padding-left: 0.9rem;
}

.sidebar__tree > ul {
    padding-left: 0.3rem;
}

.tree-node__row {
    display: flex;
    align-items: center;
    border-radius: var(--radius);
}

.tree-node__row.is-active {
    background: var(--row-selected);
}

.tree-node__toggle {
    width: 1.1rem;
    height: 1.1rem;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tree-node__toggle svg {
    width: 0.6rem;
    height: 0.6rem;
    fill: var(--text-muted);
    transition: transform 0.1s ease;
}

.tree-node__toggle svg.is-open {
    transform: rotate(90deg);
}

.tree-node__toggle--spacer {
    cursor: default;
}

.tree-node__label {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.3rem;
    text-align: left;
    flex: 1;
    border-radius: var(--radius);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tree-node__label:hover {
    background: var(--row-hover);
}

.tree-node__icon {
    width: 0.9rem;
    height: 0.9rem;
    fill: var(--folder-color);
    flex-shrink: 0;
}

.tree-node__loading {
    color: var(--text-muted);
    padding: 0.2rem 1.5rem;
    font-size: 0.8rem;
}

/* Items table (details view) */
.items-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.items-table thead th {
    text-align: left;
    padding: 0.35rem 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-elevated);
}

.items-table__row {
    cursor: pointer;
    border-bottom: 1px solid var(--border);
}

.items-table__row:hover {
    background: var(--row-hover);
}

.items-table__row.is-selected {
    background: var(--row-selected);
}

.items-table__row td {
    padding: 0.3rem 0.75rem;
    white-space: nowrap;
}

.items-table__row td:nth-child(2) {
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

.items-table__size, .items-table__date {
    color: var(--text-muted);
}

/* Grid/icon views */
.items-tiles {
    --tile-icon: calc(72rem / 13);

    display: grid;
    gap: 0.6rem;
    padding: 0.75rem;
}

.items-tiles--small {
    --tile-icon: calc(48rem / 13);

    grid-template-columns: repeat(auto-fill, calc(80rem / 13));
}

.items-tiles--medium {
    --tile-icon: calc(72rem / 13);

    grid-template-columns: repeat(auto-fill, calc(110rem / 13));
}

.items-tiles--large {
    --tile-icon: calc(112rem / 13);

    grid-template-columns: repeat(auto-fill, calc(150rem / 13));
}

.items-tiles .file-icon,
.items-tiles .tile__thumb {
    width: var(--tile-icon);
    height: var(--tile-icon);
    flex-shrink: 0;
}

.items-tiles--small .file-icon__ext {
    font-size: 0.45rem;
}

.items-tiles--medium .file-icon__ext {
    font-size: 0.55rem;
}

.items-tiles--large .file-icon__ext {
    font-size: 0.7rem;
}

.tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    padding: 0.6rem 0.4rem;
    border-radius: var(--radius);
    cursor: pointer;
    text-align: center;
}

.tile:hover {
    background: var(--row-hover);
}

.tile.is-selected {
    background: var(--row-selected);
}

.tile__thumb {
    object-fit: cover;
    border-radius: var(--radius);
    background: var(--border);
}

.tile__name {
    font-size: 0.78rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

/* File icons */
.file-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 1.4rem;
    height: 1.4rem;
}

.file-icon svg {
    width: 100%;
    height: 100%;
}

.file-icon--folder svg {
    fill: var(--folder-color);
}

.file-icon:not(.file-icon--folder) svg {
    fill: #9aa3ad;
}

.file-icon--markdown svg, .file-icon--code svg { fill: #5b8def; }
.file-icon--image svg { fill: #57b894; }
.file-icon--audio svg, .file-icon--video svg { fill: #d17bd6; }
.file-icon--archive svg { fill: #d99b3f; }
.file-icon--pdf svg { fill: #e05c5c; }

.file-icon__ext {
    position: absolute;
    bottom: -0.1rem;
    font-size: 0.4rem;
    font-weight: 700;
    color: #fff;
    background: rgba(0, 0, 0, 0.55);
    border-radius: 2px;
    padding: 0 0.15rem;
    text-transform: uppercase;
}

/* Empty / loading / error states */
.empty-state, .loading-state, .error-state {
    padding: 2.5rem 1rem;
    text-align: center;
    color: var(--text-muted);
}

.error-state p {
    margin-bottom: 0.6rem;
}

.content__hint {
    padding: 0.5rem 0.9rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* Metadata panel */
.metadata-panel__empty {
    color: var(--text-muted);
}

.metadata-panel__icon {
    display: flex;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.metadata-panel__icon .file-icon {
    width: 2.6rem;
    height: 2.6rem;
}

.metadata-panel__name {
    font-size: 0.95rem;
    text-align: center;
    overflow-wrap: anywhere;
    word-break: normal;
    margin: 0 0 0.75rem;
}

.metadata-panel__list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.25rem 0.6rem;
    font-size: 0.8rem;
    margin: 0;
}

.metadata-panel__list dt {
    color: var(--text-muted);
}

.metadata-panel__path {
    word-break: break-all;
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.metadata-panel__download {
    display: block;
    margin-top: 1rem;
    text-align: center;
    background: var(--accent);
    color: var(--accent-contrast);
    padding: 0.4rem;
    border-radius: var(--radius);
    text-decoration: none;
}

/* Preview dialog */
.preview-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1.5rem;
}

.preview-dialog {
    background: var(--bg-elevated);
    color: var(--text);
    border-radius: 6px;
    max-width: min(1100px, 96vw);
    max-height: 92vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.preview-dialog__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0.9rem;
    border-bottom: 1px solid var(--border);
    gap: 0.5rem;
}

.preview-dialog__title {
    font-size: 0.9rem;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preview-dialog__actions {
    display: flex;
    gap: 0.25rem;
    flex-shrink: 0;
}

.preview-dialog__body {
    padding: 1rem;
    overflow: auto;
    flex: 1;
}

.preview-dialog__text {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: normal;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    margin: 0;
}

.markdown-view img,
.preview-dialog__markdown img {
    max-width: 100%;
}

.markdown-view pre,
.preview-dialog__markdown pre {
    background: var(--row-hover);
    padding: 0.6rem;
    overflow: auto;
    border-radius: var(--radius);
}

.markdown-view h1,
.markdown-view h2,
.markdown-view h3 {
    margin-top: 0.4rem;
}

.preview-dialog__image {
    max-width: 100%;
    max-height: 78vh;
    display: block;
    margin: 0 auto;
}

.preview-dialog__media {
    width: 100%;
    max-height: 78vh;
}

.preview-dialog__pdf {
    width: 100%;
    height: 78vh;
    border: none;
}

.preview-dialog__status {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem 1rem;
}

.preview-dialog__truncated {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 0.75rem;
}

/* Blazor error UI */
#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    color: #2b2b2b;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 2000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}