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

:root {
    --bg-deep: #0a0c14;
    --bg-window: rgba(20, 22, 34, 0.88);
    --bg-titlebar: rgba(34, 36, 50, 0.92);
    --bg-editor: rgba(17, 19, 30, 0.62);
    --text-primary: #cdd6f4;
    --text-secondary: #a6adc8;
    --text-muted: #6c7086;
    --accent: #89b4fa;
    --success: #a6e3a1;
    --error: #f38ba8;
    --warning: #f9e2af;
    --border: rgba(116, 121, 153, 0.22);
    --inlay: #82a9d9;

    /* Font-size scale. Used everywhere — override in media queries
       rather than at individual rules. */
    --fs-sm: 14px;     /* chips, captions, secondary text */
    --fs-md: 16px;     /* base UI text, tooltip, error items */
    --fs-lg: 18px;     /* code editor */
    --fs-xl: 24px;     /* error close glyph */
}

html, body {
    height: 100%;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: var(--text-primary);
    background: var(--bg-deep);
    overflow: hidden;
}

/* ---- Background ---- */
.backdrop {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 18% 22%, #1d2247 0%, transparent 55%),
        radial-gradient(ellipse at 82% 75%, #2c1d4a 0%, transparent 55%),
        linear-gradient(135deg, #08091a 0%, #11142a 55%, #0a0c1c 100%);
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
    will-change: transform;
}
.orb-1 {
    width: 460px; height: 460px; background: #5b6df8;
    top: 5%; left: 8%;
    animation: drift-1 70s ease-in-out infinite;
}
.orb-2 {
    width: 540px; height: 540px; background: #c084fc;
    bottom: 5%; right: 6%;
    animation: drift-2 85s ease-in-out infinite;
}
.orb-3 {
    width: 380px; height: 380px; background: #38bdf8;
    top: 40%; left: 50%;
    opacity: 0.36;
    animation: drift-3 100s ease-in-out infinite;
}

@keyframes drift-1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25%      { transform: translate(280px, 120px) scale(1.08); }
    50%      { transform: translate(420px, 380px) scale(0.95); }
    75%      { transform: translate(140px, 260px) scale(1.05); }
}
@keyframes drift-2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25%      { transform: translate(-220px, -160px) scale(0.96); }
    50%      { transform: translate(-380px, -340px) scale(1.07); }
    75%      { transform: translate(-160px, -220px) scale(0.98); }
}
@keyframes drift-3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25%      { transform: translate(-260px, 200px) scale(1.06); }
    50%      { transform: translate(180px, -240px) scale(0.94); }
    75%      { transform: translate(260px, 180px) scale(1.04); }
}

/* ---- Window card ---- */
.window {
    position: relative;
    z-index: 1;
    width: 90vw;
    height: 90vh;
    height: 90dvh;
    margin: 5vh auto;
    margin: 5dvh auto;
    display: flex;
    flex-direction: column;
    background: var(--bg-window);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow:
        0 30px 90px rgba(0, 0, 0, 0.55),
        0 8px 24px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
}

/* ---- Title bar ---- */
.title-bar {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: 48px;
    padding: 0 16px;
    background: var(--bg-titlebar);
    border-bottom: 1px solid var(--border);
    user-select: none;
}

.traffic {
    display: flex;
    gap: 8px;
    justify-self: start;
}
.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.2);
}
.dot-red    { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green  { background: #27c93f; }

.title {
    justify-self: center;
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: var(--fs-md);
    color: var(--text-secondary);
    max-width: 100%;
    overflow: hidden;
}
.title-name {
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}
.title-sep { color: var(--text-muted); }
.title-sub { color: var(--text-muted); }

.title-actions {
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 12px;
}

.credits {
    font-size: var(--fs-sm);
    color: var(--text-muted);
    white-space: nowrap;
}
.credit-name { color: var(--text-secondary); }
.credit-sep { margin: 0 6px; color: var(--text-muted); }
.credit-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s;
}
.credit-link:hover { color: var(--accent); }
.chip {
    font-family: inherit;
    font-size: var(--fs-sm);
    padding: 5px 12px;
    border-radius: 8px;
    border: 1px solid rgba(137, 180, 250, 0.28);
    background: rgba(137, 180, 250, 0.12);
    color: var(--accent);
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.chip:hover {
    background: rgba(137, 180, 250, 0.22);
}
.chip.off {
    color: var(--text-muted);
    background: transparent;
    border-color: var(--border);
}
.chip.off:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
}
.chip.copied {
    color: var(--success);
    background: rgba(166, 227, 161, 0.16);
    border-color: rgba(166, 227, 161, 0.35);
}

.status {
    font-size: var(--fs-sm);
    padding: 5px 11px;
    border-radius: 8px;
    white-space: nowrap;
    background: rgba(108, 112, 134, 0.18);
    color: var(--text-muted);
    text-transform: lowercase;
    letter-spacing: 0.3px;
}
.status.ready { color: var(--success); background: rgba(166, 227, 161, 0.12); }
.status.error { color: var(--error);   background: rgba(243, 139, 168, 0.14); }

.github-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    transition: background 0.15s;
}
.github-link:hover { background: rgba(255, 255, 255, 0.06); }
.github-icon {
    width: 18px;
    height: 18px;
    filter: invert(0.85);
    transition: filter 0.15s;
}
.github-link:hover .github-icon { filter: invert(1); }

/* ---- Body (sidebar + main) ---- */
.body {
    flex: 1;
    display: flex;
    min-height: 0;
    position: relative;
}

.main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* ---- Sidebar ---- */
.sidebar {
    flex: 0 0 256px;
    display: flex;
    flex-direction: column;
    background: rgba(15, 17, 28, 0.78);
    border-right: 1px solid var(--border);
    overflow: hidden;
    transition: flex-basis 0.22s ease, opacity 0.18s ease;
}
.sidebar.collapsed {
    flex-basis: 0;
    opacity: 0;
    pointer-events: none;
    border-right-color: transparent;
}

.sidebar-header {
    padding: 14px 16px 10px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 2px;
    user-select: none;
}
.sidebar-title {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.3px;
    text-transform: uppercase;
}
.sidebar-hint {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.2px;
}

.tree {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 6px 12px;
    font-size: var(--fs-sm);
}

.tree-section + .tree-section { margin-top: 4px; }

.tree-section-header {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 7px 8px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font: inherit;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.12s, color 0.12s;
}
.tree-section-header:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}
.tree-chevron {
    display: inline-block;
    width: 10px;
    height: 10px;
    transition: transform 0.15s ease;
    color: var(--text-muted);
}
.tree-chevron::before {
    content: "";
    display: block;
    width: 0;
    height: 0;
    border-left: 5px solid currentColor;
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
    transform: translateY(1px);
}
.tree-section.open .tree-chevron { transform: rotate(90deg); }
.tree-section-icon {
    color: var(--accent);
    font-size: 13px;
    line-height: 1;
}
.tree-section-label { flex: 1; }
.tree-section-count {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
}

.tree-children {
    display: none;
    margin: 2px 0 6px;
    padding-left: 14px;
    border-left: 1px solid rgba(255, 255, 255, 0.05);
    margin-left: 13px;
}
.tree-section.open .tree-children { display: block; }

.tree-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 6px 8px 6px 6px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font: inherit;
    text-align: left;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.12s, color 0.12s;
}
.tree-item:hover {
    background: rgba(137, 180, 250, 0.08);
    color: var(--text-primary);
}
.tree-item.active {
    background: rgba(137, 180, 250, 0.16);
    color: var(--accent);
    box-shadow: inset 2px 0 0 var(--accent);
}
.tree-item-icon {
    flex-shrink: 0;
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    opacity: 0.8;
}
.tree-item:hover .tree-item-icon,
.tree-item.active .tree-item-icon { color: var(--accent); opacity: 1; }
.tree-item-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.sidebar-footer {
    padding: 10px 14px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-muted);
    min-height: 36px;
    line-height: 1.4;
}
.dot-status {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    flex-shrink: 0;
}
.dot-status.active { background: var(--accent); box-shadow: 0 0 8px rgba(137, 180, 250, 0.6); }
#example-blurb {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---- Sidebar toggle button ---- */
.sidebar-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 10px 5px 8px;
}
.sidebar-toggle-icon {
    display: inline-flex;
    flex-direction: column;
    gap: 2.5px;
    width: 12px;
}
.sidebar-toggle-icon span {
    display: block;
    height: 1.5px;
    background: currentColor;
    border-radius: 1px;
}
.sidebar-toggle-icon span:nth-child(2) { width: 70%; }
.sidebar-toggle-icon span:nth-child(3) { width: 85%; }

/* Scrim shown only on mobile when sidebar is open over content */
.sidebar-scrim {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(2px);
    z-index: 5;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}
.sidebar-scrim.visible {
    opacity: 1;
    pointer-events: auto;
}

/* ---- Editor ---- */
.editor-container {
    flex: 1;
    position: relative;
    min-height: 0;
}

.editor-container .CodeMirror,
.editor-container .CodeMirror.cm-s-dracula {
    position: absolute !important;
    inset: 0;
    height: auto !important;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace !important;
    font-size: var(--fs-lg);
    line-height: 1.6;
    background: var(--bg-editor) !important;
    padding: 8px 0;
}
.editor-container .CodeMirror-gutters,
.editor-container .cm-s-dracula .CodeMirror-gutters {
    background: rgba(0, 0, 0, 0.4) !important;
    border-right: 1px solid var(--border) !important;
}
.CodeMirror-linenumber {
    color: var(--text-muted) !important;
    padding: 0 14px 0 8px !important;
}
.editor-container .CodeMirror-lines { padding-left: 8px !important; }

/* ---- Inlay hints ----
   Rendered inline with the source as a *subtle* pill so readers see
   at a glance that the annotation isn't part of the code itself. The
   border is faint enough to fade into the editor, but the rounded
   shape and slight tint clearly separate it from the JS tokens. */
.inlay-hint {
    display: inline-block;
    font-style: italic;
    color: var(--inlay);
    background: rgba(130, 169, 217, 0.07);
    border: 1px solid rgba(130, 169, 217, 0.22);
    border-radius: 999px;
    padding: 0 0.55em;
    margin: 0 0.05em 0 0.4em;
    line-height: 1.25;
    pointer-events: none;
    user-select: none;
    font-size: 0.82em;
    vertical-align: baseline;
    transition: background 0.15s, border-color 0.15s, opacity 0.15s;
}
.inlay-hint:hover {
    background: rgba(130, 169, 217, 0.14);
    border-color: rgba(130, 169, 217, 0.4);
    opacity: 1;
}

/* ---- Hover tooltip ---- */
.hover-tooltip {
    position: fixed;
    z-index: 100;
    display: none;
    max-width: 560px;
    padding: 10px 14px;
    background: rgba(20, 22, 34, 0.96);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: var(--fs-md);
    line-height: 1.45;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45);
    pointer-events: none;
    white-space: pre-wrap;
    word-break: break-word;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.hover-tooltip.visible { display: block; }
.hover-tooltip .tooltip-name { color: var(--accent); font-weight: 600; }
.hover-tooltip .tooltip-type { color: var(--success); }

/* ---- Errors ---- */
.error-bar {
    border-top: 1px solid rgba(243, 139, 168, 0.4);
    background: rgba(20, 22, 34, 0.85);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
}
.error-bar.visible {
    max-height: 220px;
}
.error-bar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: rgba(243, 139, 168, 0.08);
    color: var(--error);
    font-size: var(--fs-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}
.error-bar-header button {
    background: none;
    border: none;
    color: var(--error);
    cursor: pointer;
    font-size: var(--fs-xl);
    line-height: 1;
    padding: 0 6px;
}
.error-content {
    max-height: 200px;
    overflow: auto;
    padding: 10px 16px;
}
.error-item {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: var(--fs-md);
    cursor: pointer;
}
.error-item:last-child { border-bottom: none; }
.error-item .message { color: var(--error); }
.error-item .location { color: var(--text-muted); font-size: var(--fs-sm); margin-top: 3px; }

/* ---- Error underline in editor ---- */
.error-underline {
    text-decoration: underline wavy var(--error);
    background: rgba(243, 139, 168, 0.12);
}

/* ---- Onboarding demo cursor ---- */
.demo-cursor {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    width: 0;
    height: 0;
    pointer-events: none;
    opacity: 0;
    transform: translate(-100px, -100px);
    transition: transform 0.85s cubic-bezier(0.4, 0.0, 0.2, 1),
                opacity 0.4s ease;
    will-change: transform, opacity;
}
.demo-cursor.visible { opacity: 1; }

.demo-cursor-arrow {
    position: absolute;
    top: -2px;
    left: -2px;
    width: 24px;
    height: 24px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.5));
}

.demo-cursor-ring {
    position: absolute;
    top: 6px;
    left: 6px;
    width: 12px;
    height: 12px;
    margin: -6px;
    border-radius: 50%;
    background: rgba(137, 180, 250, 0.55);
    opacity: 0;
    transform: scale(0.4);
    pointer-events: none;
}
.demo-cursor.clicking .demo-cursor-ring {
    animation: demo-ripple 0.55s ease-out;
}
@keyframes demo-ripple {
    0%   { opacity: 0.8; transform: scale(0.4); }
    100% { opacity: 0;   transform: scale(3.2); }
}
.demo-cursor.clicking .demo-cursor-arrow {
    animation: demo-press 0.4s ease-out;
}
@keyframes demo-press {
    0%, 100% { transform: scale(1); }
    40%      { transform: scale(0.82); }
}

.demo-cursor-caption {
    position: absolute;
    top: 30px;
    left: 18px;
    white-space: nowrap;
    padding: 7px 12px;
    background: rgba(20, 22, 34, 0.95);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.3;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.demo-cursor-caption.visible {
    opacity: 1;
    transform: translateY(0);
}
.demo-cursor-caption .accent { color: var(--accent); font-weight: 600; }
.demo-cursor-caption .muted  { color: var(--text-muted); }

/* Caption flips to the left of the cursor when near right edge */
.demo-cursor.flip-caption .demo-cursor-caption {
    left: auto;
    right: 18px;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.08); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.18); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
    :root {
        --fs-sm: 13px;
        --fs-md: 15px;
        --fs-lg: 16px;
        --fs-xl: 22px;
    }
    /* Full-bleed on mobile so the title bar + editor reach the visible
       edges of the viewport (no clipped-under-URL-bar surprise). */
    .window {
        width: 100vw;
        height: 100vh;
        height: 100dvh;
        margin: 0;
        border-radius: 0;
        border-width: 0;
    }
    /* Drop the desktop grid for flex so chips can sit naturally on the
       right and the title can ellipsis-truncate instead of overflowing. */
    .title-bar {
        display: flex;
        gap: 8px;
        padding: 0 10px;
    }
    .title {
        flex: 1 1 auto;
        min-width: 0;
        justify-content: flex-start;
        overflow: hidden;
    }
    .title-name {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .title-actions {
        flex-shrink: 0;
        gap: 6px;
    }
    .title-sub, .title-sep, .credits { display: none; }
    .chip { padding: 4px 10px; }

    /* Sidebar overlays the editor on mobile */
    .sidebar {
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        z-index: 10;
        flex-basis: 280px;
        max-width: 84vw;
        box-shadow: 8px 0 24px rgba(0, 0, 0, 0.5);
        transform: translateX(0);
        transition: transform 0.22s ease, opacity 0.18s ease;
    }
    .sidebar.collapsed {
        transform: translateX(-100%);
        flex-basis: 280px;
        opacity: 1;
        border-right-color: var(--border);
    }
    .sidebar-toggle-label { display: none; }
}

@media (max-width: 480px) {
    .tree-item-label { font-size: 13px; }
}