:root {
    --bg-default: #1e1e1e;
    --bg-surface: #252526;
    --bg-subdued: #2d2d30;
    --neutral-medium: #8b8b8b;
    --neutral-heavy: #cccccc;
    --neutral-trim: #3e3e42;
    --interactive-medium: #9d9d9d;
    --interactive-selected: #ffffff;
    --accent: #0a84ff;
    --accent-hover: #409cff;
}

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

body {
    font-family: monospace;
    background-color: var(--bg-default);
    color: var(--neutral-heavy);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.app-header {
    background-color: var(--bg-default);
    border-bottom: 6px solid var(--accent-hover);
    height: 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.header-left,
.header-right {
    position: absolute;
    top: 17px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 10;
}

.header-left {
    left: 10px;
}

.header-right {
    right: 10px;
}

.title-pill {
    display: flex;
    align-items: center;
    background-color: var(--neutral-trim);
    border-radius: 12px;
    padding: 6px 12px;
}

.title-pill h1 {
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1;
    color: var(--neutral-heavy);
}

.workspace {
    flex: 1;
    overflow: hidden;
    padding-top: 47px;
}

.split-container {
    height: 100%;
    display: flex;
    background-color: var(--bg-surface);
}

.explorer-resizer {
    width: 6px;
    flex: 0 0 6px;
    background-color: var(--bg-default);
    border-right: 1px solid var(--neutral-trim);
    cursor: col-resize;
    transition: background-color 120ms ease;
}

.explorer-resizer:hover,
.explorer-resizer.dragging {
    background-color: var(--neutral-trim);
}

.explorer-resizer:focus-visible {
    outline: 1px solid var(--accent);
    outline-offset: -1px;
}

.explorer-resizer.hidden {
    display: none;
}

.repl-pane {
    width: 100%;
    min-width: 320px;
    height: 100%;
    background-color: var(--bg-subdued);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.repl-pane.full-width {
    width: 100%;
}

.file-explorer-pane {
    width: 280px;
    min-width: 220px;
    max-width: 320px;
    border-right: 1px solid var(--neutral-trim);
    background-color: var(--bg-default);
    display: flex;
    flex-direction: column;
}

.file-explorer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-bottom: 1px solid var(--neutral-trim);
    font-size: 0.85rem;
    color: var(--neutral-medium);
}

.file-explorer-toggle {
    border: 0;
    background-color: transparent;
    color: var(--interactive-medium);
    font-family: monospace;
    font-size: 1rem;
    min-width: 40px;
    height: 28px;
    padding: 0;
    border-radius: 0;
    cursor: pointer;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.file-explorer-toggle:hover {
    color: var(--interactive-selected);
}

.file-explorer-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transform: translateX(3px);
}

.file-explorer-pane.collapsed .file-explorer-icon {
    transform: translateX(3px);
}

.file-explorer-icon svg {
    width: 20px;
    height: 20px;
    display: block;
}

.file-explorer-chevron {
    font-size: 1.5rem;
}

.file-explorer-refresh {
    border: 0;
    background-color: transparent;
    color: var(--interactive-medium);
    width: 28px;
    height: 28px;
    padding: 0;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.file-explorer-refresh:hover {
    color: var(--interactive-selected);
}

.file-explorer-refresh:focus-visible {
    outline: 1px solid var(--accent);
    outline-offset: 1px;
}

.file-explorer-refresh svg {
    width: 16px;
    height: 16px;
    display: block;
}

.file-explorer-pane.collapsed {
    width: 52px;
    min-width: 52px;
    max-width: 52px;
}

.file-explorer-pane.collapsed .file-list,
.file-explorer-pane.collapsed .file-list-empty,
.file-explorer-pane.collapsed .file-list-separator,
.file-explorer-pane.collapsed .file-row,
.file-explorer-pane.collapsed .file-space-footer {
    display: none;
}

.file-explorer-pane.collapsed .file-explorer-refresh {
    display: none;
}

.file-explorer-pane.collapsed .file-explorer-header {
    justify-content: center;
    padding: 10px 0;
}

body.is-resizing-explorer,
body.is-resizing-explorer * {
    cursor: col-resize !important;
    user-select: none;
}

.file-list {
    flex: 1;
    overflow-y: auto;
    padding: 6px;
}

.file-space-footer {
    border-top: 1px solid var(--neutral-trim);
    padding: 8px 10px;
    font-size: 0.78rem;
    color: var(--neutral-medium);
    text-transform: lowercase;
}

.file-list-empty {
    padding: 8px;
    color: var(--neutral-medium);
    font-size: 0.85rem;
}

.file-list-separator {
    height: 1px;
    background-color: var(--neutral-trim);
    margin: 6px 8px;
}

.file-row {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 6px;
}

.file-row:hover {
    background-color: var(--bg-surface);
}

.file-main {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    flex: 1;
}

.file-play-btn {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1px solid var(--neutral-trim);
    background-color: transparent;
    color: var(--interactive-medium);
    font-family: monospace;
    font-size: 0.72rem;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding-left: 1px;
}

.file-play-btn:hover {
    color: var(--interactive-selected);
    border-color: var(--interactive-medium);
}

.file-play-spacer {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.file-label {
    font-size: 0.85rem;
    color: var(--neutral-heavy);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-first-pill {
    border: 0;
    background-color: var(--neutral-heavy);
    color: #000;
    font-family: monospace;
    font-size: 0.68rem;
    line-height: 1;
    padding: 4px 6px 2px;
    border-radius: 999px;
    text-transform: lowercase;
    flex-shrink: 0;
}

.file-menu-btn {
    border: 1px solid var(--neutral-trim);
    background-color: var(--bg-surface);
    color: var(--interactive-medium);
    font-family: monospace;
    font-size: 1rem;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    cursor: pointer;
    line-height: 0.9;
}

.file-menu-btn:hover {
    color: var(--interactive-selected);
    border-color: var(--interactive-medium);
}

.file-menu {
    position: absolute;
    top: 30px;
    right: 8px;
    display: none;
    z-index: 20;
    min-width: 148px;
    background-color: var(--bg-surface);
    border: 1px solid var(--neutral-trim);
    border-radius: 8px;
    padding: 4px;
}

.file-menu.open {
    display: block;
}

.file-menu-item {
    width: 100%;
    text-align: left;
    border: 0;
    background: transparent;
    color: var(--neutral-heavy);
    font-family: monospace;
    font-size: 0.84rem;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
}

.file-menu-item:hover {
    background-color: var(--bg-default);
}

.repl-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
}

.repl-output-area {
    position: relative;
    flex: 1;
    min-height: 0;
}

.repl-output {
    height: 100%;
    overflow-y: auto;
    padding: 16px;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}

.output-cleanup-btn {
    position: absolute;
    right: 12px;
    top: 12px;
    z-index: 5;
}

.repl-output a {
    color: var(--accent-hover);
}

.repl-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-top: 1px solid var(--neutral-trim);
    border-bottom: 1px solid var(--neutral-trim);
    background-color: var(--bg-default);
}

.repl-actions-spacer {
    flex: 1;
}

.repl-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-surface);
    border: 1px solid var(--neutral-trim);
    border-radius: 999px;
    padding: 6px 10px;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

.repl-status-pill:hover {
    color: var(--interactive-selected);
    border-color: var(--interactive-medium);
}

.header-left .repl-status-pill {
    margin-left: 2px;
}

.repl-status-indicator {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background-color: var(--neutral-medium);
}

.repl-status-indicator.connected {
    background-color: var(--accent);
}

.repl-status-text {
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1;
    color: var(--neutral-heavy);
}

.repl-connection-btn,
.repl-action-btn {
    border: 1px solid var(--neutral-trim);
    background-color: var(--bg-surface);
    color: var(--interactive-medium);
    font-family: monospace;
    font-size: 0.85rem;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
}

.repl-connection-btn:hover,
.repl-action-btn:hover {
    color: var(--interactive-selected);
    border-color: var(--interactive-medium);
}

.repl-input-container {
    padding: 12px;
    background-color: var(--bg-subdued);
}

.repl-input-row {
    position: relative;
}

.repl-input-prompt {
    position: absolute;
    top: 10px;
    left: 10px;
    color: var(--neutral-medium);
    font-family: monospace;
    font-size: 0.9rem;
    line-height: 1.4;
    user-select: none;
    pointer-events: none;
}

.repl-input {
    width: 100%;
    flex: 1;
    min-height: 68px;
    max-height: 220px;
    resize: vertical;
    border: 1px solid var(--neutral-trim);
    border-radius: 8px;
    background-color: var(--bg-surface);
    color: var(--interactive-selected);
    font-family: monospace;
    font-size: 0.9rem;
    line-height: 1.4;
    padding: 10px 10px 10px 36px;
    outline: none;
}

.repl-input:focus {
    border-color: var(--accent);
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
}

.modal-content {
    width: min(700px, 100%);
    max-height: 90vh;
    overflow: auto;
    background: var(--bg-surface);
    border: 1px solid var(--neutral-trim);
    border-radius: 12px;
    padding: 16px;
}

.modal-content h2 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.modal-content p {
    color: var(--neutral-medium);
    margin-bottom: 8px;
}

.modal-btn {
    border: 1px solid var(--neutral-trim);
    background-color: var(--bg-default);
    color: var(--interactive-medium);
    font-family: monospace;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
}

@media (max-width: 900px) {
    .header-left,
    .header-right {
        top: 10px;
        gap: 8px;
    }

    .workspace {
        padding-top: 42px;
    }

    .repl-actions {
        flex-wrap: wrap;
    }

    .file-explorer-pane {
        width: 220px;
        min-width: 180px;
    }
}