:root {
    --page-bg: #2f3129;
    --panel-bg: #1f221b;
    --panel-border: #3f4437;
    --text-main: #f4f5f0;
    --text-muted: #b7beaa;
    --sidebar-width: 236px;
    --sidebar-collapsed-width: 72px;
    --toolbar-height: 56px;
    --accent-save: #6dddf2;
    --accent-open: #f53855;
    --accent-folder: #ca6a4a;
    --accent-share: #a7c336;
    --accent-run: #3b82f6;
    --accent-home: #ef7d62;
    --accent-download: #7f6df2;
    --toolbar-hover-lift: 4px;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: var(--page-bg);
    color: var(--text-main);
    overflow: hidden;
}

* {
    box-sizing: border-box;
}

.ace_editor .ace_content span,
.ace_editor .ace_content .ace_line {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace !important;
}

.ace_editor .ace_gutter-cell {
    cursor: pointer;
}

.ace_editor .ace_gutter-cell.codemark-line-highlight-gutter {
    background: rgba(255, 209, 102, 0.18);
    color: #ffd166;
    font-weight: 700;
}

.ace_editor .ace_marker-layer .codemark-line-highlight {
    position: absolute;
    z-index: 2;
    background: rgba(255, 209, 102, 0.2);
    border-left: 3px solid rgba(255, 209, 102, 0.95);
    box-shadow: inset 0 0 0 1px rgba(255, 209, 102, 0.14);
}

.ace_editor .ace_marker-layer .ace_active-line {
    z-index: 1;
}

.ace_editor .ace_marker-layer .ace_selection {
    z-index: 3;
}

#appRoot {
    height: 100vh;
    width: 100vw;
    display: flex;
    overflow: hidden;
    position: relative;
}

#projectSidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--panel-bg);
    border-right: 1px solid var(--panel-border);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transform-origin: left center;
    transition: transform 0.3s cubic-bezier(0.22, 0.7, 0.24, 1),
                width 0.3s cubic-bezier(0.22, 0.7, 0.24, 1),
                min-width 0.3s cubic-bezier(0.22, 0.7, 0.24, 1);
    z-index: 140;
}

#projectSidebar::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 18px;
    height: 100%;
    pointer-events: none;
    opacity: 0;
    transform: translateX(10px);
    background: linear-gradient(to left, rgba(0, 0, 0, 0.34), rgba(0, 0, 0, 0));
    transition: opacity 0.24s ease, transform 0.24s ease;
}

#sidebarResizeHandle {
    position: absolute;
    top: 0;
    right: 0;
    width: 10px;
    height: 100%;
    cursor: col-resize;
    z-index: 12;
    background: transparent;
}

#sidebarResizeHandle::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 4px;
    width: 2px;
    background: rgba(109, 221, 242, 0);
    transition: background 0.14s ease;
}

#sidebarResizeHandle:hover::before,
body.sidebar-resizing #sidebarResizeHandle::before {
    background: rgba(109, 221, 242, 0.78);
}

body.sidebar-resizing {
    cursor: col-resize;
    user-select: none;
}

body.sidebar-resizing #projectSidebar {
    transition: none;
}

#appRoot.sidebar-collapsed #projectSidebar {
    width: var(--sidebar-collapsed-width);
    min-width: var(--sidebar-collapsed-width);
    transform: translateX(0);
    border-right: 1px solid var(--panel-border);
}

#appRoot.sidebar-collapsed #projectSidebar::after {
    opacity: 1;
    transform: translateX(0);
}

#appRoot.sidebar-collapsed #sidebarResizeHandle {
    display: none;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 6px;
    min-height: 52px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--panel-border);
    transition: padding 0.22s ease, min-height 0.22s ease;
}

.sidebar-logo-btn {
    border: none;
    background: transparent;
    color: inherit;
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.16s ease, transform 0.14s ease, margin-left 0.22s ease;
}

.sidebar-logo-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar-logo-btn:active {
    transform: scale(0.95);
}

.sidebar-logo-svg {
    width: 30px;
    height: 30px;
    display: block;
}

.sidebar-title {
    flex: 1 1 auto;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.2s ease, max-width 0.24s ease, transform 0.24s ease;
}

#appRoot.sidebar-collapsed .sidebar-title {
    max-width: 0;
    opacity: 0;
    transform: translateX(-10px);
    margin: 0;
}

.sidebar-action,
.sidebar-floating-toggle {
    border: none;
    color: #fff;
    cursor: pointer;
    border-radius: 6px;
}

.sidebar-floating-toggle {
    width: 32px;
    height: 32px;
    padding: 0;
    background: rgba(31, 34, 27, 0.9);
    border: 1px solid var(--panel-border);
    color: var(--text-muted);
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.16s ease, color 0.16s ease, transform 0.14s ease,
                width 0.22s ease, opacity 0.16s ease, border-width 0.22s ease;
    margin-left: auto;
    flex-shrink: 0;
}

.sidebar-floating-toggle:hover {
    background: #364030;
    color: var(--text-main);
}

.sidebar-floating-toggle:active {
    transform: scale(0.95);
}

.sidebar-floating-toggle svg {
    width: 20px;
    height: 20px;
    transition: transform 0.22s ease;
}

#appRoot.sidebar-collapsed .sidebar-floating-toggle svg {
    transform: rotate(180deg);
}

.sidebar-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px;
    border-bottom: 1px solid var(--panel-border);
    transition: padding 0.22s ease, gap 0.22s ease, border-color 0.22s ease;
}

.sidebar-action {
    width: 100%;
    height: 46px;
    padding: 0 12px;
    font-size: 14px;
    font-weight: 600;
    background: transparent;
    color: #dce2cf;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    justify-content: flex-start;
    border-radius: 16px;
    transition: background 0.16s ease, color 0.16s ease, padding 0.22s ease, border-radius 0.22s ease, gap 0.22s ease;
}

.sidebar-action:hover {
    background: rgba(255, 255, 255, 0.08);
}

.sidebar-action .sidebar-action-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-action .sidebar-action-icon svg {
    width: 18px;
    height: 18px;
}

.sidebar-action .sidebar-action-text {
    white-space: nowrap;
    line-height: 1;
    overflow: hidden;
    max-width: 128px;
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.16s ease, max-width 0.2s ease, transform 0.2s ease;
}

.sidebar-action.primary {
    background: transparent;
    color: #dce2cf;
}

.sidebar-action.primary:hover {
    background: rgba(255, 255, 255, 0.08);
}

.sidebar-action.upload {
    color: #d7ddca;
}

.sidebar-action.folder {
    background: transparent;
    color: #dce2cf;
}

.sidebar-action.folder:hover {
    background: rgba(255, 255, 255, 0.08);
}

.sidebar-action.select.active {
    background: rgba(109, 221, 242, 0.18);
    color: #eaffff;
}

.sidebar-action.clear {
    color: #ffb4a8;
}

.sidebar-action.clear:hover {
    background: rgba(245, 56, 85, 0.14);
    color: #ffd2cb;
}

#appRoot.sidebar-collapsed .sidebar-header {
    justify-content: flex-start;
    padding: 8px 10px;
    min-height: 52px;
    border-bottom: none;
}

#appRoot.sidebar-collapsed .sidebar-logo-btn {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    margin: 0 0 0 7px;
}

#appRoot.sidebar-collapsed .sidebar-logo-svg {
    width: 30px;
    height: 30px;
}

#appRoot.sidebar-collapsed .sidebar-floating-toggle {
    width: 0;
    min-width: 0;
    padding: 0;
    margin-left: 0;
    border-width: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    overflow: hidden;
}

#appRoot.sidebar-collapsed .sidebar-actions {
    padding: 6px 8px 10px;
    gap: 6px;
}

#appRoot.sidebar-collapsed .sidebar-action {
    padding: 0;
    border-radius: 12px;
    justify-content: center;
    gap: 0;
}

#appRoot.sidebar-collapsed .sidebar-action .sidebar-action-text {
    max-width: 0;
    opacity: 0;
    transform: translateX(-6px);
}

#appRoot.sidebar-collapsed #projectTreeEmpty,
#appRoot.sidebar-collapsed #projectFileTree {
    display: none;
}

#projectFileTree {
    flex: 1;
    overflow: auto;
    padding: 8px;
}

#projectFileTree.is-drop-target,
#projectTreeEmpty.is-drop-target {
    outline: 1px dashed rgba(109, 221, 242, 0.72);
    outline-offset: -4px;
    background: rgba(109, 221, 242, 0.08);
}

#projectFileTree.is-external-upload-target,
#projectTreeEmpty.is-external-upload-target,
.tree-folder-title.is-external-upload-target,
.tree-file-button.is-external-upload-target {
    outline: 1px dashed rgba(26, 115, 232, 0.88);
    outline-offset: -3px;
    background: rgba(26, 115, 232, 0.12);
}

#editorArea.is-external-upload-target::after {
    content: "Drop files or folders to upload";
    position: absolute;
    inset: 14px;
    z-index: 80;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px dashed rgba(109, 221, 242, 0.82);
    border-radius: 10px;
    background: rgba(31, 34, 27, 0.72);
    color: var(--text-main);
    font-size: 14px;
    font-weight: 700;
    pointer-events: none;
}

.tree-group {
    margin: 0;
    padding-left: 0;
    list-style: none;
}

.tree-node {
    margin: 2px 0;
}

.tree-folder {
    color: #d7ddca;
    font-size: 13px;
    margin: 6px 0 2px;
    opacity: 0.9;
}

.tree-folder-title {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 6px;
    border-radius: 6px;
    cursor: pointer;
    min-height: 28px;
    user-select: none;
}

.tree-folder-title[draggable="true"],
.tree-file-button[draggable="true"] {
    -webkit-user-drag: element;
}

.tree-folder-title:hover {
    background: rgba(255, 255, 255, 0.08);
}

.tree-folder-title.is-upload-target {
    background: rgba(109, 221, 242, 0.18);
    color: #eaffff;
}

.tree-folder-title:focus-visible,
.tree-file-button:focus-visible {
    outline: 1px solid rgba(109, 221, 242, 0.8);
    outline-offset: 1px;
}

.tree-entry-label {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-select-control {
    display: none;
    width: 16px;
    min-width: 16px;
    height: 16px;
    margin-right: 6px;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
}

#appRoot.project-selection-visible .tree-select-control {
    display: inline-flex;
}

.tree-select-checkbox {
    width: 14px;
    height: 14px;
    margin: 0;
    cursor: pointer;
    accent-color: var(--accent-download);
}

.tree-file-button {
    width: 100%;
    border: none;
    text-align: left;
    background: transparent;
    color: var(--text-main);
    border-radius: 6px;
    padding: 7px 8px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 0;
    cursor: pointer;
    transition: background 0.15s ease;
}

.tree-file-button:hover {
    background: rgba(255, 255, 255, 0.08);
}

.tree-file-button.active {
    background: rgba(109, 221, 242, 0.2);
    color: #eaffff;
}

.tree-folder-title.is-dragging,
.tree-file-button.is-dragging {
    opacity: 0.48;
}

.tree-folder-title.is-drop-target,
.tree-file-button.is-drop-target {
    background: rgba(109, 221, 242, 0.16);
    outline: 1px dashed rgba(109, 221, 242, 0.82);
    outline-offset: -2px;
}

.tree-folder-toggle {
    width: 12px;
    min-width: 12px;
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1;
    text-align: center;
}

.tree-folder-icon {
    width: 20px;
    min-width: 20px;
    height: 20px;
    margin-right: 0;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.tree-file-icon {
    width: 20px;
    min-width: 20px;
    height: 20px;
    margin-right: 7px;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.tree-vscode-icon-image {
    width: 100%;
    height: 100%;
    display: block;
}

.tree-file-icon-text {
    display: none;
}

.tree-group.is-collapsed {
    display: none;
}

.file-icon-python { background: linear-gradient(135deg, #2f6fb0 0%, #48a6ff 54%, #ffd15a 55%, #f1b83b 100%); color: #fff; }
.file-icon-javascript { background: #f0d848; color: #2f2a12; }
.file-icon-typescript { background: #3478c6; color: #fff; }
.file-icon-html { background: #e86d37; color: #fff; }
.file-icon-css { background: #297bd7; color: #fff; }
.file-icon-markdown { background: #55606a; color: #f5f7fa; }
.file-icon-json { background: #d79e2a; color: #221a09; }
.file-icon-yaml { background: #8357c5; color: #fff; }
.file-icon-java { background: #d34f3f; color: #fff; }
.file-icon-php { background: #777bb4; color: #fff; }
.file-icon-ruby { background: #c83f4d; color: #fff; }
.file-icon-go { background: #25a9c7; color: #fff; }
.file-icon-shell { background: #4e9a45; color: #fff; }
.file-icon-sql { background: #2d8bcf; color: #fff; }
.file-icon-image { background: #49a65f; color: #fff; }
.file-icon-audio { background: #9d62ce; color: #fff; }
.file-icon-video { background: #d2783d; color: #fff; }
.file-icon-pdf { background: #d44848; color: #fff; }
.file-icon-archive { background: #9a7840; color: #fff; }
.file-icon-code { background: #5a7fb7; color: #fff; }
.file-icon-text { background: #737d71; color: #fff; }
.file-icon-asset { background: #6970b8; color: #fff; }

.tree-delete-btn .bi {
    font-size: 13px;
    line-height: 1;
}

.tree-delete-btn,
.tree-delete-confirm-btn {
    flex: 0 0 auto;
    border: none;
    border-radius: 5px;
    height: 22px;
    min-width: 24px;
    padding: 0 6px;
    margin-left: 6px;
    font-size: 12px;
    line-height: 1;
    cursor: pointer;
}

.tree-delete-btn {
    background: transparent;
    color: #ffb4a8;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.12s ease, background 0.12s ease;
}

.tree-folder-title:hover .tree-delete-btn,
.tree-file-button:hover .tree-delete-btn,
.tree-delete-btn:focus,
.tree-delete-confirm-btn {
    opacity: 1;
    pointer-events: auto;
}

.tree-delete-btn:hover {
    background: rgba(245, 56, 85, 0.16);
}

.tree-delete-confirm-btn {
    background: #e5484d;
    color: #fff;
    font-weight: 700;
}

.tree-rename-input {
    width: 100%;
    height: 28px;
    border: 1px solid rgba(109, 221, 242, 0.72);
    border-radius: 6px;
    background: #11140f;
    color: var(--text-main);
    padding: 0 7px;
    font-size: 13px;
    outline: none;
}

.tree-create-row {
    min-height: 28px;
    border-radius: 6px;
    background: rgba(109, 221, 242, 0.1);
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 6px;
}

.tree-create-row .tree-folder-toggle {
    color: transparent;
}

.tree-create-input {
    flex: 1 1 auto;
    min-width: 0;
    height: 24px;
}

.project-context-menu {
    position: fixed;
    z-index: 260;
    min-width: 168px;
    padding: 6px;
    border-radius: 8px;
    border: 1px solid var(--panel-border);
    background: #252920;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.38);
    display: none;
}

.project-context-menu button {
    width: 100%;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-main);
    text-align: left;
    padding: 0 10px;
    font-size: 13px;
    cursor: pointer;
}

.project-context-menu button:hover {
    background: rgba(255, 255, 255, 0.1);
}

.project-context-menu-separator {
    height: 1px;
    margin: 5px 4px;
    background: rgba(255, 255, 255, 0.12);
}

.project-context-menu button.danger {
    color: #ffb4a8;
}

.project-context-menu button.danger:hover {
    background: rgba(245, 56, 85, 0.16);
}

.sidebar-empty {
    padding: 12px;
    color: var(--text-muted);
    font-size: 13px;
}

#workspaceMain {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    transition: transform 0.26s ease;
    position: relative;
    background: var(--page-bg);
    isolation: isolate;
}

#editorArea {
    flex: 1;
    min-height: 0;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

#editor {
    position: absolute;
    inset: 0;
    z-index: 1;
}

#htmlPreviewPane {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: none;
    background: #fff;
}

#htmlPreviewFrame {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
    background: #fff;
}

#editorArea.share-view-split #editor {
    right: 50%;
    border-right: 1px solid rgba(255, 255, 255, 0.16);
}

#editorArea.share-view-split #htmlPreviewPane {
    left: 50%;
    width: auto;
    border-left: 1px solid rgba(34, 37, 28, 0.28);
    box-shadow: -16px 0 36px rgba(0, 0, 0, 0.18);
}

#editorArea.is-preview-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 10040;
    background: #fff;
}

#editorArea.is-preview-fullscreen #editor,
#editorArea.is-preview-fullscreen #assetViewer {
    display: none !important;
}

#editorArea.is-preview-fullscreen #htmlPreviewPane {
    display: block !important;
    inset: 0 !important;
    left: 0 !important;
    right: 0 !important;
    top: 0 !important;
    bottom: 0 !important;
    width: auto;
    border: none;
    box-shadow: none;
}

.editor-preview-controls {
    position: absolute;
    top: 14px;
    right: 16px;
    z-index: 12;
    align-items: center;
    gap: 6px;
    max-width: calc(100% - 32px);
    padding: 6px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.07)),
        rgba(37, 41, 32, 0.5);
    box-shadow:
        0 16px 36px rgba(0, 0, 0, 0.34),
        inset 0 1px 0 rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(18px) saturate(1.35);
    -webkit-backdrop-filter: blur(18px) saturate(1.35);
    opacity: 0.48;
    overflow-x: auto;
    scrollbar-width: none;
    transition: opacity 0.16s ease;
}

.editor-preview-controls::-webkit-scrollbar {
    display: none;
}

.editor-preview-controls.is-visible {
    display: flex;
}

.editor-preview-controls:hover,
.editor-preview-controls:focus-within {
    opacity: 1;
}

#editorArea.share-view-split .editor-preview-controls {
    right: calc(50% + 16px);
    max-width: calc(50% - 32px);
}

#editorArea.is-preview-fullscreen .editor-preview-controls {
    right: 16px;
    max-width: calc(100% - 32px);
}

.preview-mode-btn,
.preview-fullscreen-btn {
    min-width: 0;
    height: 34px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    background: rgba(31, 34, 27, 0.42);
    color: rgba(244, 245, 240, 0.88);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0 11px;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition:
        color 0.16s ease,
        background 0.16s ease,
        border-color 0.16s ease,
        box-shadow 0.16s ease,
        transform 0.14s ease;
}

.preview-mode-btn i,
.preview-fullscreen-btn i {
    font-size: 14px;
    line-height: 1;
}

.preview-mode-btn:hover,
.preview-fullscreen-btn:hover {
    color: #fff;
    background: rgba(91, 109, 74, 0.58);
    border-color: rgba(219, 242, 176, 0.34);
    transform: translateY(-1px);
}

.preview-mode-btn:active,
.preview-fullscreen-btn:active {
    transform: translateY(0);
}

.preview-mode-btn.is-active,
.preview-fullscreen-btn.is-active {
    color: #f9ffe8;
    background:
        linear-gradient(135deg, rgba(167, 195, 54, 0.5), rgba(109, 221, 242, 0.22)),
        rgba(31, 34, 27, 0.5);
    border-color: rgba(226, 246, 158, 0.5);
    box-shadow:
        0 0 0 1px rgba(226, 246, 158, 0.08),
        0 8px 22px rgba(167, 195, 54, 0.22),
        inset 0 1px 0 rgba(255, 255, 255, 0.24);
}

.preview-mode-btn:disabled,
.preview-fullscreen-btn:disabled {
    opacity: 0.48;
    cursor: not-allowed;
    transform: none;
}

#assetViewer {
    position: absolute;
    inset: 0;
    padding: 20px;
    overflow: auto;
    background: #1a1d17;
    color: var(--text-main);
    display: none;
}

.asset-preview-stage {
    --asset-preview-max-height: calc(100vh - var(--toolbar-height) - 190px);
    --asset-preview-max-height: min(72vh, calc(100vh - var(--toolbar-height) - 190px));
    width: 100%;
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.22);
}

.asset-preview-stage.is-audio {
    padding: 14px;
}

#assetViewer .asset-media {
    max-width: 100%;
    display: block;
}

#assetViewer img.asset-media,
#assetViewer video.asset-media {
    width: auto;
    height: auto;
    max-height: var(--asset-preview-max-height);
    object-fit: contain;
    border-radius: 9px;
}

#assetViewer video.asset-media {
    width: 100%;
    background: #000;
}

#assetViewer audio.asset-media {
    width: 100%;
}

@media (max-width: 768px) {
    .asset-preview-stage {
        --asset-preview-max-height: calc(100vh - var(--toolbar-height) - 150px);
        --asset-preview-max-height: min(62vh, calc(100vh - var(--toolbar-height) - 150px));
    }
}

.asset-meta {
    margin-top: 14px;
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
    word-break: break-word;
}

.asset-open-link {
    display: inline-block;
    margin-top: 14px;
    color: #8fd4ff;
    text-decoration: none;
    border: 1px solid #8fd4ff;
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 13px;
}

.toolbar {
    height: calc(var(--toolbar-height) + var(--toolbar-hover-lift));
    margin-top: calc(var(--toolbar-hover-lift) * -1);
    padding-top: var(--toolbar-hover-lift);
    background: linear-gradient(
        to bottom,
        transparent 0,
        transparent var(--toolbar-hover-lift),
        var(--panel-border) var(--toolbar-hover-lift),
        var(--panel-border) calc(var(--toolbar-hover-lift) + 1px),
        var(--page-bg) calc(var(--toolbar-hover-lift) + 1px),
        var(--page-bg) 100%
    );
    border-top: none;
    display: flex;
    align-items: center;
    gap: 0;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    position: relative;
    z-index: 160;
    flex: 0 0 calc(var(--toolbar-height) + var(--toolbar-hover-lift));
}

.toolbar::-webkit-scrollbar {
    height: 8px;
}

.toolbar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.16);
    border-radius: 999px;
}

.toolbar button,
.toolbar select {
    height: 100%;
    border: none;
}

.toolbar-btn {
    color: #fff;
    border-radius: 0;
    border-width: 0;
    width: 88px;
    min-width: 88px;
    transition: transform 0.14s ease, filter 0.14s ease;
    font-size: 14px;
    position: relative;
    z-index: 1;
}

.toolbar-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.08);
    cursor: pointer;
    z-index: 2;
}

.toolbar-btn:active {
    transform: translateY(0);
    filter: brightness(0.92);
}

.toolbar-btn.save { background-color: var(--accent-save); }
.toolbar-btn.open { background-color: var(--accent-open); }
.toolbar-btn.folder { background-color: var(--accent-folder); }
.toolbar-btn.download { background-color: var(--accent-download); }
.toolbar-btn.share { background-color: var(--accent-share); }
.toolbar-btn.run { background-color: var(--accent-run); }
.toolbar-btn.home { background-color: var(--accent-home); }

.project-download-btn:disabled {
    opacity: 0.64;
    cursor: wait;
}

.toolbar-select-group {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 10px;
    color: #fff;
    font-size: 13px;
    border-left: 1px solid rgba(255, 255, 255, 0.12);
    height: 100%;
}

.toolbar-select {
    height: 36px !important;
    border-radius: 6px;
    border: 1px solid #4a5342 !important;
    background: #252920;
    color: #fff;
    padding: 0 8px;
    min-width: 126px;
}

.html-share-view-control {
    display: none;
}

.toolbar .html-share-view-control.is-visible {
    display: flex;
}

#floatingMenu .html-share-view-control.is-visible {
    display: block;
}

.toolbar-link {
    color: #d8dfca;
    text-decoration: none;
    margin: 0 12px;
    font-size: 13px;
}

.toolbar-link:hover {
    color: #fff;
}

#sidebarBackdrop {
    display: none;
}

#floatingToggle {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    z-index: 10000;
    width: 40px;
    height: 40px;
    background-color: var(--accent-home);
    border-radius: 6px 0 0 6px;
    display: none;
    justify-content: center;
    align-items: center;
    color: #fff;
    cursor: pointer;
    font-size: 20px;
    line-height: 1;
}

#floatingMenu {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translate(100%, -50%);
    background-color: #2f3129;
    padding: 10px;
    border-radius: 8px 0 0 8px;
    transition: transform 0.3s ease;
    z-index: 9999;
    box-shadow: -2px 2px 6px rgba(0, 0, 0, 0.5);
    width: 220px;
    display: none;
}

#floatingMenu.show-menu {
    transform: translate(0, -50%);
}

#floatingMenu button {
    display: block;
    width: 100%;
    margin-bottom: 8px;
    color: #fff;
    border-width: 0;
    border-radius: 4px;
    height: 40px;
    cursor: pointer;
}

#mobile-toggle-files { background: #56634a; }
#mobile-new-file { background: #657056; }
#mobile-save { background: var(--accent-save); }
#mobile-open { background: var(--accent-open); }
#mobile-folder { background: var(--accent-folder); }
#mobile-download { background: var(--accent-download); }
#mobile-share { background: var(--accent-share); }
#mobile-python-run { background: var(--accent-run); }
#mobile-home { background: var(--accent-home); }

#floatingMenu .mobile-select-wrap {
    margin-top: 8px;
}

#floatingMenu .mobile-select-wrap label {
    font-size: 12px;
    color: #fff;
    margin-bottom: 4px;
    display: block;
}

#floatingMenu .mobile-select {
    width: 100%;
    height: 36px;
    border-radius: 4px;
    border: 1px solid #4a5342;
    background: #252920;
    color: #fff;
    padding: 0 8px;
}

#projectConfirmOverlay,
#aboutOverlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.64);
    display: none;
    z-index: 10020;
}

.overlay-dialog {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 560px;
    background: #fff;
    border-radius: 12px;
    color: #222;
    max-height: 82vh;
    overflow: auto;
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.35);
}

.overlay-dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid #ececec;
}

.overlay-dialog-title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
}

.overlay-dialog-close {
    border: none;
    background: none;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    color: #333;
}

.overlay-dialog-body {
    padding: 18px;
}

.overlay-field {
    margin-bottom: 14px;
}

.overlay-field label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: #444;
}

.overlay-field input,
.overlay-field select {
    width: 100%;
    height: 38px;
    border-radius: 6px;
    border: 1px solid #d5d8dd;
    padding: 0 10px;
    font-size: 14px;
}

.overlay-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.overlay-actions button {
    border: none;
    border-radius: 6px;
    height: 36px;
    padding: 0 14px;
    cursor: pointer;
}

.btn-secondary-lite {
    background: #eaedf2;
    color: #333;
}

.btn-primary-lite {
    background: #3a7cff;
    color: #fff;
}

.btn-danger-lite {
    background: #e5484d;
    color: #fff;
}

.project-confirm-message {
    margin: 0 0 18px;
    color: #333;
    font-size: 14px;
    line-height: 1.7;
}

.project-notice {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 10030;
    max-width: min(360px, calc(100vw - 36px));
    padding: 10px 14px;
    border-radius: 8px;
    background: #252920;
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.34);
    font-size: 13px;
    line-height: 1.45;
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.16s ease, transform 0.16s ease;
}

.project-notice.show {
    opacity: 1;
    transform: translateY(0);
}

.project-upload-overlay {
    position: fixed;
    inset: 0;
    z-index: 10025;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(10, 12, 10, 0.48);
}

.project-upload-overlay.show {
    display: flex;
}

.project-upload-dialog {
    width: min(520px, 100%);
    max-height: min(680px, calc(100vh - 40px));
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: #f8fafc;
    color: #1f2937;
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.46);
    overflow: hidden;
}

.project-upload-dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 18px 12px;
    border-bottom: 1px solid #e5e7eb;
}

.project-upload-dialog-title {
    margin: 0;
    font-size: 17px;
    font-weight: 800;
    line-height: 1.2;
}

.project-upload-dialog-close,
.project-upload-progress-close,
.project-upload-progress-collapse {
    border: none;
    background: transparent;
    color: inherit;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.project-upload-dialog-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: #4b5563;
}

.project-upload-dialog-close:hover {
    background: #eef2f7;
}

.project-upload-dialog-body {
    padding: 16px 18px 18px;
    overflow: auto;
}

.project-upload-target-row {
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin-bottom: 14px;
}

.project-upload-target-row label {
    margin: 0;
    font-size: 12px;
    font-weight: 800;
    color: #4b5563;
}

.project-upload-target-row select {
    height: 38px;
    border-radius: 8px;
    border: 1px solid #cfd6e2;
    padding: 0 10px;
    color: #1f2937;
    background: #fff;
    font-size: 13px;
    outline: none;
}

.project-upload-target-row select:focus {
    border-color: #1a73e8;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.14);
}

.project-upload-drop-zone {
    min-height: 220px;
    border: 2px dashed #b8c4d4;
    border-radius: 12px;
    background: #ffffff;
    color: #1f2937;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 22px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.project-upload-drop-zone:hover,
.project-upload-drop-zone.is-drag-over {
    border-color: #1a73e8;
    background: #eef5ff;
}

.project-upload-drop-zone:focus-visible {
    outline: 3px solid rgba(26, 115, 232, 0.28);
    outline-offset: 2px;
}

.project-upload-drop-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #e8f0fe;
    color: #1a73e8;
    font-size: 24px;
}

.project-upload-drop-title {
    font-size: 16px;
    font-weight: 800;
    line-height: 1.35;
}

.project-upload-drop-subtitle {
    color: #6b7280;
    font-size: 12px;
    line-height: 1.55;
}

.project-upload-choose-btn {
    margin-top: 4px;
    height: 36px;
    border: none;
    border-radius: 18px;
    padding: 0 16px;
    background: #1a73e8;
    color: #fff;
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
}

.project-upload-choose-btn:hover {
    background: #155fc2;
}

.project-upload-progress-panel {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 10035;
    width: min(420px, calc(100vw - 36px));
    max-height: min(520px, calc(100vh - 36px));
    display: none;
    flex-direction: column;
    overflow: hidden;
    border-radius: 10px;
    border: 1px solid #d8dee8;
    background: #fff;
    color: #202124;
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.36);
}

.project-upload-progress-panel.show {
    display: flex;
}

.project-upload-progress-header {
    min-height: 54px;
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: #f8fafd;
    border-bottom: 1px solid #e5e7eb;
}

.project-upload-progress-collapse,
.project-upload-progress-close {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    color: #5f6368;
    font-size: 15px;
}

.project-upload-progress-collapse:hover,
.project-upload-progress-close:hover {
    background: #edf1f7;
}

.project-upload-progress-title {
    font-size: 13px;
    font-weight: 800;
    line-height: 1.25;
}

.project-upload-progress-summary {
    margin-top: 2px;
    color: #6b7280;
    font-size: 12px;
    line-height: 1.3;
}

.project-upload-progress-list {
    overflow: auto;
    max-height: 420px;
    padding: 4px 0;
}

.project-upload-progress-panel.is-collapsed .project-upload-progress-list {
    display: none;
}

.project-upload-progress-panel.is-collapsed {
    max-height: 56px;
}

.project-upload-progress-item {
    display: grid;
    grid-template-columns: 28px 1fr auto;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 8px 12px;
    border-bottom: 1px solid #f0f2f5;
}

.project-upload-progress-item:last-child {
    border-bottom: none;
}

.project-upload-progress-ring {
    --progress: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: conic-gradient(#1a73e8 calc(var(--progress) * 1%), #d9dfe8 0);
    position: relative;
    color: #1a73e8;
    font-size: 14px;
}

.project-upload-progress-ring::before {
    content: "";
    position: absolute;
    inset: 4px;
    border-radius: 50%;
    background: #fff;
}

.project-upload-progress-ring i {
    position: relative;
    z-index: 1;
    display: none;
}

.project-upload-progress-ring.is-complete {
    background: #1e8e3e;
    color: #fff;
}

.project-upload-progress-ring.is-complete::before {
    display: none;
}

.project-upload-progress-ring.is-complete i {
    display: inline-flex;
}

.project-upload-progress-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.25;
}

.project-upload-progress-path {
    margin-top: 2px;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #6b7280;
    font-size: 11px;
    line-height: 1.3;
}

.project-upload-progress-percent {
    min-width: 42px;
    text-align: right;
    color: #5f6368;
    font-size: 12px;
    font-weight: 700;
}

#qrcode {
    margin: 8px auto 16px;
    text-align: center;
}

#share-modal {
    z-index: 10020;
}

.modal-backdrop {
    z-index: 10010;
}

#share-modal .modal-dialog {
    margin: 0.5rem auto;
    max-width: 70%;
    width: auto;
}

#share-modal .modal-content {
    color: #212529;
    max-height: 80vh;
    overflow-y: auto;
}

#share-modal .modal-title a {
    word-break: break-all;
}

#final-image-container {
    margin-top: 20px;
}

#final-image-container img {
    max-width: 90%;
    border-radius: 8px;
    border: 1px solid #e3e5e8;
}

.copy-success {
    display: none;
    color: #28a745;
    font-weight: bold;
    margin-top: 10px;
    animation: fadeInOut 2s forwards;
}

@keyframes fadeInOut {
    0% { opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { opacity: 0; }
}

@media (max-width: 768px) {
    #share-modal .modal-dialog {
        max-width: 95% !important;
        margin: 1rem auto;
    }
}

.about-content {
    line-height: 1.75;
    font-size: 14px;
}

.about-content img {
    max-width: 160px;
    border-radius: 8px;
    margin-top: 8px;
}

@media (max-width: 992px) {
    :root {
        --sidebar-width: 228px;
    }
}

@media (max-width: 768px) {
    #projectSidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        height: 100vh;
        transform: translateX(-100%);
        width: var(--sidebar-width);
        min-width: var(--sidebar-width);
        z-index: 130;
        border-right: 1px solid var(--panel-border);
    }

    #sidebarResizeHandle {
        display: none;
    }

    #appRoot.sidebar-open #projectSidebar {
        transform: translateX(0);
    }

    #appRoot.sidebar-collapsed #projectSidebar {
        width: var(--sidebar-width);
        min-width: var(--sidebar-width);
        transform: translateX(-100%);
    }

    #appRoot.sidebar-collapsed #projectTreeEmpty,
    #appRoot.sidebar-collapsed #projectFileTree {
        display: block;
    }

    #sidebarBackdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.46);
        z-index: 120;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.22s ease;
        display: block;
    }

    #appRoot.sidebar-open #sidebarBackdrop {
        opacity: 1;
        pointer-events: auto;
    }

    #workspaceMain {
        transform: translateX(0);
    }

    #appRoot.sidebar-open #workspaceMain {
        transform: translateX(0);
    }

    .toolbar {
        display: none;
    }

    #editorArea.share-view-split #editor {
        right: 0;
        bottom: 50%;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.16);
    }

    #editorArea.share-view-split #htmlPreviewPane {
        left: 0;
        top: 50%;
        border-left: none;
        border-top: 1px solid rgba(34, 37, 28, 0.28);
        box-shadow: 0 -16px 36px rgba(0, 0, 0, 0.18);
    }

    .editor-preview-controls {
        top: 10px;
        right: 10px;
        max-width: calc(100% - 20px);
        gap: 4px;
        padding: 5px;
    }

    #editorArea.share-view-split .editor-preview-controls,
    #editorArea.is-preview-fullscreen .editor-preview-controls {
        right: 10px;
        max-width: calc(100% - 20px);
    }

    .preview-mode-btn,
    .preview-fullscreen-btn {
        height: 32px;
        padding: 0 9px;
        font-size: 11px;
    }

    #floatingToggle,
    #floatingMenu {
        display: flex;
    }

    #floatingMenu {
        display: block;
    }

    .overlay-dialog {
        width: 92%;
        max-height: 88vh;
    }
}