@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&family=JetBrains+Mono:ital,wght@0,400;0,500;0,600;1,400&display=swap');

:root {
    --bg: #15181d; /* Deeper, more immersive dark background */
    --bg-panel: #1e222b; /* Refined One Dark panel tone */
    --bg-toolbar: #1a1d24; /* Balanced toolbar background */
    --border: #2e3340; /* Soft, low-contrast dark border */
    --fg: #abb2bf;
    --fg-dim: #737c8c;
    --accent: #f5a623; /* Vibrant golden amber */
    --accent-hover: #f7b343; /* Brighter amber for hover interactive states */
    --accent-fg: #15181d; /* High-contrast dark text on gold background */
    --focus-ring: rgba(245, 166, 35, 0.25);
    --error: #e06c75;
    --ok: #98c379;
    --tok-comment: #5c6370;
    --tok-string: #98c379;
    --tok-number: #d19a66;
    --tok-variable: #61afef;
    --tok-predicate: #e5c07b;
    --tok-keyword: #c678dd;
    --tok-punct: #abb2bf;
    --mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, "Liberation Mono", monospace;
    --sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
}

:root[data-theme="light"] {
    --bg: #fdfdfc; /* Premium Warm Alabaster background */
    --bg-panel: #f5f4ef; /* Smooth porcelain-like container */
    --bg-toolbar: #edebe4; /* Distinct warm-gray toolbar */
    --border: #d4cfc3; /* Vintage paper border line */
    --fg: #332f29; /* Slate charcoal */
    --fg-dim: #7c7569;
    --accent: #a83d00; /* Rich, high-contrast terracotta burnt orange */
    --accent-hover: #c44700; /* Vivid burnt orange for hover reactive states */
    --accent-fg: #fdfdfc; /* High-contrast warm white on terracotta */
    --focus-ring: rgba(168, 61, 0, 0.2);
    --error: #d32f2f;
    --ok: #388e3c;
    --tok-comment: #8b8f97;
    --tok-string: #388e3c;
    --tok-number: #78350f; /* Rich deep amber-brown */
    --tok-variable: #1a73e8;
    --tok-predicate: #0f766e; /* Deep premium teal */
    --tok-keyword: #8e24aa;
    --tok-punct: #332f29;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
    font-size: 14px;
    transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

header, nav, .toolbar, .pane, #output, footer, dialog, button, select, #divider {
    transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg-toolbar);
    border-bottom: 1px solid var(--border);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand h1 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

nav a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s ease;
}

nav a:hover {
    text-decoration: underline;
}

nav button {
    background: none;
    border: 0;
    padding: 0;
    color: var(--accent);
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
    transition: color 0.15s ease;
}

nav button:hover {
    text-decoration: underline;
}

#theme {
    font-size: 15px;
    transition: color 0.15s ease, transform 0.15s ease;
}

#theme:hover {
    text-decoration: none;
    transform: scale(1.08);
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 8px 16px;
    background: var(--bg-toolbar);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.toolbar label {
    color: var(--fg-dim);
    font-size: 13px;
}

.toolbar select,
.toolbar button {
    background: var(--bg-panel);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 5px 12px;
    font-size: 13px;
    cursor: pointer;
    font-family: inherit;
    transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
    outline: none;
}

.toolbar select:focus,
.toolbar button:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--focus-ring);
}

.toolbar button:hover {
    border-color: var(--accent);
}

.toolbar button:active {
    transform: scale(0.97);
}

#run {
    background: var(--accent);
    color: var(--accent-fg);
    font-weight: 600;
    border-color: var(--accent);
}

#run:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

#status-container {
    display: flex;
    align-items: center;
    margin-left: auto;
}

#status {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0;
    transition: opacity 0.2s ease, background-color 0.25s ease;
    line-height: 1.2;
}

#status:not(:empty) {
    opacity: 1;
}

#status.ok {
    background: rgba(152, 195, 121, 0.15);
    color: var(--ok);
    border: 1px solid rgba(152, 195, 121, 0.3);
}

#status.error {
    background: rgba(224, 108, 117, 0.15);
    color: var(--error);
    border: 1px solid rgba(224, 108, 117, 0.3);
}

#status.cleared {
    background: rgba(128, 128, 128, 0.12);
    color: var(--fg-dim);
    border: 1px solid rgba(128, 128, 128, 0.25);
}

main {
    display: flex;
    flex: 1;
    min-height: 0;
}

.pane {
    min-width: 120px;
    overflow: hidden;
    display: flex;
}

.editor-pane {
    flex: 0 0 55%;
}

.output-pane {
    flex: 1;
    background: var(--bg-panel);
    display: flex;
    flex-direction: column;
}

.output-header {
    display: flex;
    justify-content: flex-end;
    padding: 6px 12px;
    background: var(--bg-toolbar);
    border-bottom: 1px solid var(--border);
}

.output-header button {
    background: var(--bg-panel);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 10px;
    font-size: 11px;
    font-family: var(--sans);
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease;
    outline: none;
}

.output-header button:hover {
    border-color: var(--accent);
}


#divider {
    flex: 0 0 5px;
    cursor: col-resize;
    background: var(--border);
    transition: background-color 0.15s ease;
}

#divider:hover, #divider.dragging {
    background: var(--accent);
}

.editor-container {
    display: flex;
    flex: 1;
    width: 100%;
    height: 100%;
    background: var(--bg);
    overflow: hidden;
}

.editor-gutter {
    flex: 0 0 auto;
    width: 44px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border);
    padding: 12px 0;
    text-align: right;
    user-select: none;
    overflow: hidden;
    position: relative;
}

.editor-linenos {
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.5;
    color: var(--fg-dim);
    padding-right: 8px;
    white-space: pre;
}

/* Editor: a transparent textarea over a highlighted backdrop. */
.editor {
    position: relative;
    flex: 1;
    overflow: hidden;
}

.editor pre,
.editor textarea {
    position: absolute;
    inset: 0;
    margin: 0;
    padding: 12px;
    border: 0;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.5;
    tab-size: 4;
    white-space: pre;
    overflow: auto;
}

.editor pre {
    pointer-events: none;
    color: var(--fg);
    background: var(--bg);
    overflow: hidden; /* Prevent double scrollbars; positioning is synced via JS */
}

.editor pre::-webkit-scrollbar {
    display: none; /* Hide WebKit scrollbars */
}

.editor textarea {
    resize: none;
    outline: none;
    background: transparent;
    color: transparent;
    caret-color: var(--fg);
}

.editor textarea::selection {
    background: rgba(97, 175, 239, 0.25);
    color: transparent;
}

.tok-comment {
    color: var(--tok-comment);
    font-style: italic;
}

.tok-string {
    color: var(--tok-string);
}

.tok-number {
    color: var(--tok-number);
}

.tok-variable {
    color: var(--tok-variable);
}

.tok-predicate {
    color: var(--tok-predicate);
}

.tok-keyword {
    color: var(--tok-keyword);
}

.tok-punct {
    color: var(--tok-punct);
}

#output {
    flex: 1;
    margin: 0;
    padding: 12px;
    overflow: auto;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.5;
    white-space: pre;
}

#output.error {
    color: var(--error);
}

footer {
    padding: 6px 16px;
    background: var(--bg-toolbar);
    border-top: 1px solid var(--border);
    color: var(--fg-dim);
    font-size: 12px;
}

footer code, footer kbd {
    font-family: var(--mono);
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 0 4px;
}

dialog {
    width: min(440px, 90vw);
    padding: 28px 36px;
    background: var(--bg-panel);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.6;
    outline: none;
}

dialog[open] {
    animation: dialogFadeIn 0.2s ease-out forwards;
}

dialog::backdrop {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
}

@keyframes dialogFadeIn {
    from {
        opacity: 0;
        transform: scale(0.98) translateY(5px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

dialog h2 {
    margin-top: 0;
    font-size: 18px;
}

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

dialog code {
    font-family: var(--mono);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 0 4px;
}

dialog button {
    background: var(--bg);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 5px 12px;
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.15s ease, color 0.15s ease;
}

dialog button:hover {
    border-color: var(--accent);
}

/* Styled scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--fg-dim);
}

/* About box improvements based on ocelot web design */
.about-content {
    margin-top: 14px;
}

.about-content p {
    color: var(--fg);
    font-size: 13px;
    line-height: 1.5;
    margin: 0 auto 14px;
}

.about-info {
    margin: 0 auto 16px;
    border-top: 1px solid var(--border);
}

.about-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    font-family: var(--mono);
}

.about-row span:first-child {
    color: var(--fg-dim);
}

.about-row span:last-child {
    color: var(--fg);
    font-weight: 500;
}

.about-support {
    margin: 10px 0 0;
    font-size: 12px;
    color: var(--fg-dim);
    line-height: 1.5;
}

.about-actions {
    margin: 16px 0;
    font-size: 13px;
    text-align: center;
}

.about-actions a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.about-actions a:hover {
    text-decoration: underline;
}

#about-dialog button {
    display: block;
    margin: 16px auto 0;
}

#help-dialog {
    width: min(640px, 95vw);
    max-height: 80vh;
    overflow-y: auto;
}

#help-dialog button {
    display: block;
    margin: 20px auto 0;
}

.help-content {
    margin-top: 14px;
}

.help-content section {
    margin-bottom: 20px;
}

.help-content h3 {
    margin: 0 0 8px;
    font-size: 15px;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    padding-bottom: 4px;
}

.help-content p {
    margin: 0 0 10px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--fg);
}

.help-content ul {
    margin: 0 0 12px;
    padding-left: 20px;
    font-size: 13px;
}

.help-content li {
    margin-bottom: 8px;
}

.help-content pre {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 8px 12px;
    margin: 8px 0;
    overflow-x: auto;
}

.help-content pre code {
    background: transparent;
    border: none;
    padding: 0;
    font-size: 12px;
    line-height: 1.4;
    color: var(--fg);
}

/* Inline error highlights in syntax backdrop */
.line-error {
    background: rgba(224, 108, 117, 0.12) !important;
    border-left: 3px solid var(--error) !important;
    display: inline-block;
    width: 100%;
}

/* Wasm engine loading states */
.loader-container {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--fg-dim);
    font-size: 13px;
    padding: 8px 0;
}

.loader-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Output header telemetry info panel */
#telemetry-info {
    font-size: 12px;
    color: var(--fg-dim);
    margin-right: auto;
    align-self: center;
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* View toggle styling */
.view-toggle {
    display: flex;
    margin-right: 8px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px;
    align-self: center;
}

.view-toggle button {
    background: transparent;
    border: none !important;
    border-radius: 3px;
    padding: 3px 8px;
    font-size: 11px;
    font-family: var(--sans);
    color: var(--fg-dim);
    cursor: pointer;
    transition: color 0.15s ease, background-color 0.15s ease;
    line-height: 1;
}

.view-toggle button:hover {
    color: var(--fg);
}

.view-toggle button.active {
    background: var(--border);
    color: var(--fg);
}

/* Tabular output styling */
#output-table {
    flex: 1;
    margin: 0;
    padding: 12px;
    overflow: auto;
}

.output-table-group {
    margin-bottom: 24px;
}

.output-table-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.output-table-title {
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    margin: 0;
}

.copy-table-btn {
    background: var(--bg-panel);
    color: var(--fg-dim);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 3px 10px;
    font-size: 11px;
    font-family: var(--sans);
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
    line-height: 1;
}

.copy-table-btn:hover {
    color: var(--fg);
    border-color: var(--accent);
}

.output-table-el {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
    font-family: var(--sans);
    font-size: 13px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.output-table-el th, .output-table-el td {
    padding: 8px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.output-table-el th {
    background: var(--bg-toolbar);
    font-weight: 600;
    color: var(--fg);
    border-bottom: 2px solid var(--border);
}

.output-table-el th.index-col,
.output-table-el td.index-col {
    width: 40px;
    text-align: center;
    color: var(--fg-dim);
    background: var(--bg-toolbar);
    border-right: 1px solid var(--border);
    user-select: none;
}

.output-table-el tr:last-child td {
    border-bottom: none;
}

.output-table-el tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.output-table-el tbody tr[data-atom] {
    cursor: pointer;
}

.output-table-el tbody tr[data-atom]:hover td {
    background: rgba(127, 127, 127, 0.12);
}

.output-table-no-results {
    font-family: var(--sans);
    font-size: 13px;
    color: var(--fg-dim);
    font-style: italic;
    padding: 12px 0;
}

.output-table-text-block {
    margin: 0 0 16px 0;
    padding: 8px 12px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--fg);
    font-family: var(--mono);
    font-size: 13px;
    white-space: pre-wrap;
    word-break: break-all;
}