:root {
    --bg:          #0d1117;
    --bg-panel:    #161b22;
    --bg-elevated: #1c2330;
    --bg-input:    #0b0f16;
    --bg-editor:   #0b0e14;
    --border:      #2a313c;
    --border-soft: #21262d;
    --text:        #c9d1d9;
    --text-muted:  #8b949e;
    --text-faint:  #5b6675;
    --accent:      #00dd63;
    --accent-hi:   #00ff71;
    --accent-dim:  rgba(0, 221, 99, 0.18);
    --output:      #3ddc84;
    --error:       #f14c4c;
    --warning:     #e2c08d;
    --info:        #4aa3ff;
    --line-h:      21px;
    --mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Menlo, Consolas, monospace;
    --ui: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: var(--ui);
    background: var(--bg);
    color: var(--text);
    overflow: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hi); }

/* ===== IDE shell ===== */

.ide {
    display: grid;
    grid-template-rows: auto 1fr auto;
    height: 100vh;
    min-height: 0;
}

/* ---- Title bar ---- */

.titlebar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 6px 12px;
    background: linear-gradient(180deg, #12171f, var(--bg-panel));
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 6px;
    font-size: 15px;
    white-space: nowrap;
}
.brand-mark { color: var(--accent); font-size: 13px; }
.brand-name { font-weight: 700; color: var(--accent); letter-spacing: 0.3px; }
.brand-ver { color: var(--text-faint); font-family: var(--mono); font-size: 11px; }
.brand-sub {
    margin-left: 4px;
    color: var(--text-muted);
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
}

.tb-controls, .tb-examples {
    display: flex;
    align-items: center;
    gap: 8px;
}
.tb-examples { margin-left: auto; }

.tb-field {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.tb-check {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
}

/* ---- Body: sidebar + main ---- */

.ide-body {
    display: grid;
    grid-template-columns: 250px 1fr;
    min-height: 0;
    overflow: hidden;
}

.sidebar {
    background: var(--bg-panel);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.panel-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-muted);
    background: #12161d;
    border-bottom: 1px solid var(--border-soft);
    border-top: 1px solid var(--border-soft);
}
.panel-head-tag {
    margin-left: auto;
    color: var(--accent);
    border: 1px solid var(--accent-dim);
    background: var(--accent-dim);
    border-radius: 4px;
    padding: 0 5px;
    font-size: 9px;
    letter-spacing: 0.5px;
}

.panel-head-bottom { border-top: 1px solid var(--border); }
.runcfg { padding: 8px 12px; display: flex; flex-direction: column; gap: 6px; flex: 0 0 auto; }
.runcfg-actions { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.runcfg-actions .btn-run { flex: 1; }
.runcfg-actions .tb-check { white-space: nowrap; }
.runcfg-download { width: 100%; margin: 4px 0 0; font-size: 12px; }
.runcfg label {
    display: flex;
    flex-direction: column;
    gap: 3px;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.runcfg-hint { color: var(--text-faint); font-size: 10px; font-style: italic; }

/* ---- Outline ---- */

.outline-lang {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-soft);
}
.outline-lang-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}
.outline-lang select { flex: 1; font-size: 12px; }

.outline { padding: 4px 0; overflow-y: auto; flex: 1; }
.outline-empty { padding: 8px 12px; color: var(--text-faint); font-size: 12px; font-style: italic; }
.outline-row {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 3px 12px 3px 8px;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
}
.outline-row:hover { background: var(--bg-elevated); }
.outline-name { color: var(--text); }
.outline-detail { color: var(--text-faint); font-size: 11px; font-family: var(--mono); }
.outline-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px; height: 16px;
    border-radius: 3px;
    font-size: 11px;
    font-family: var(--mono);
    font-weight: 700;
    flex: 0 0 auto;
}
.sym-class  { background: rgba(226,192,141,.16); color: #e2c08d; }
.sym-func   { background: rgba(0,221,99,.16);    color: var(--accent); }
.sym-field  { background: rgba(74,163,255,.16);  color: var(--info); }
.sym-enum   { background: rgba(197,134,255,.16); color: #c586ff; }
.sym-other  { background: var(--bg-elevated);    color: var(--text-muted); }

/* ---- Main column ---- */

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

.tabbar {
    display: flex;
    align-items: stretch;
    flex: 0 0 auto;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    height: 34px;
}
.tab {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 0 14px;
    font-size: 13px;
    background: var(--bg-editor);
    border-right: 1px solid var(--border);
    color: var(--text);
}
.tab-active { box-shadow: inset 0 2px 0 var(--accent); }
.tab-icon { color: var(--accent); font-size: 11px; }
.tabbar-spacer { flex: 1; }
.tabbar-hint {
    display: flex; align-items: center;
    padding: 0 12px;
    color: var(--text-faint);
    font-size: 11px;
    font-family: var(--mono);
}

/* ---- Editor ---- */

.editor {
    display: flex;
    align-items: stretch;
    flex: 1 1 auto;
    min-height: 0;
    background: var(--bg-editor);
    overflow: hidden;
}

.bottom-resizer {
    flex: 0 0 auto;
    height: 6px;
    cursor: ns-resize;
    background: transparent;
    border-top: 1px solid var(--border);
    transition: background-color .12s;
}
.bottom-resizer:hover, .bottom-resizer.dragging { background: var(--accent); }

.gutter {
    flex: 0 0 auto;
    min-width: 3.6em;
    padding: 10px 0 10px 0;
    text-align: right;
    background: var(--bg-editor);
    border-right: 1px solid var(--border-soft);
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}
.gln {
    position: relative;
    height: var(--line-h);
    line-height: var(--line-h);
    padding: 0 12px 0 18px;
    font-family: var(--mono);
    font-size: 14px;
    color: var(--text-faint);
}
.gln.sev-error   { color: var(--error); }
.gln.sev-warning { color: var(--warning); }
.gln.sev-error::before, .gln.sev-warning::before {
    content: '';
    position: absolute;
    left: 6px; top: 50%;
    width: 6px; height: 6px;
    margin-top: -3px;
    border-radius: 50%;
}
.gln.sev-error::before   { background: var(--error); }
.gln.sev-warning::before { background: var(--warning); }

.code-wrap {
    position: relative;
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
}

.code-syntax, .code-highlight, .code-wrap textarea {
    margin: 0;
    padding: 10px 14px;
    font-family: var(--mono);
    font-size: 14px;
    line-height: var(--line-h);
    tab-size: 2;
    -moz-tab-size: 2;
    white-space: pre;
    border: 0;
}

/* Bottom layer: colored syntax tokens. */
.code-syntax {
    position: absolute;
    top: 0; left: 0;
    color: var(--text);
    pointer-events: none;
    overflow: visible;
    will-change: transform;
    z-index: 1;
}

/* Middle layer: transparent text carrying only the diagnostic squiggles. */
.code-highlight {
    position: absolute;
    top: 0; left: 0;
    color: transparent;
    pointer-events: none;
    overflow: visible;
    will-change: transform;
    z-index: 2;
}

/* Top layer: the editable textarea — transparent text (colors come from the
   syntax layer below), visible caret and selection. */
.code-wrap textarea {
    position: absolute;
    inset: 0;
    width: 100%; height: 100%;
    color: transparent;
    background: transparent;
    caret-color: var(--accent-hi);
    overflow: auto;
    outline: none;
    resize: none;
    z-index: 3;
}
.code-wrap textarea::selection { background: rgba(0, 221, 99, 0.28); }

/* Syntax token colors */
.tok-comment { color: #6a9955; font-style: italic; }
.tok-keyword { color: #569cd6; }
.tok-string  { color: #ce9178; }
.tok-number  { color: #b5cea8; }
.tok-type    { color: #4ec9b0; }
.tok-func    { color: #dcdcaa; }
.tok-op      { color: #d4d4d4; }
.tok-ident   { color: var(--text); }

/* Squiggles (rendered under the transparent mirror text) */
.sq { text-decoration-line: underline; text-decoration-style: wavy; text-decoration-skip-ink: none; text-decoration-thickness: 1px; }
.sq.sev-error   { text-decoration-color: var(--error); background: rgba(241,76,76,.10); }
.sq.sev-warning { text-decoration-color: var(--warning); background: rgba(226,192,141,.10); }
.sq.sev-info    { text-decoration-color: var(--info); }

/* ---- Bottom panel ---- */

.bottom {
    display: grid;
    grid-template-rows: auto 1fr;
    flex: 0 0 auto;
    height: 230px;
    min-height: 80px;
    background: var(--bg-panel);
}
.bottom.bottom-collapsed {
    height: auto;
    min-height: 0;
}
.bottom.bottom-collapsed .bottom-body { display: none; }
.bottom.bottom-collapsed .bottom-tabs { border-bottom: none; }

.bottom-tabs {
    display: flex;
    align-items: stretch;
    background: #12161d;
    border-bottom: 1px solid var(--border-soft);
}
.bottom-tabs-spacer { flex: 1; }
.bottom-max {
    padding: 0 12px;
    margin: 0;
    background: transparent;
    border: none;
    border-left: 1px solid var(--border-soft);
    border-radius: 0;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
}
.bottom-max:hover { color: var(--text); background: var(--bg-elevated); }
.btab {
    padding: 6px 14px;
    margin: 0;
    background: transparent;
    border: none;
    border-right: 1px solid var(--border-soft);
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    border-radius: 0;
}
.btab:hover { color: var(--text); background: var(--bg-elevated); }
.btab-active { color: var(--text); box-shadow: inset 0 -2px 0 var(--accent); background: var(--bg-editor); }
.badge {
    display: inline-block;
    min-width: 16px;
    padding: 0 5px;
    margin-left: 4px;
    border-radius: 9px;
    background: var(--bg-elevated);
    color: var(--text-muted);
    font-size: 10px;
    font-family: var(--mono);
    text-align: center;
}

.bottom-body { position: relative; min-height: 0; overflow: hidden; }
.bpanel { display: none; height: 100%; overflow: auto; }
.bpanel-active { display: block; }

.term {
    font-family: var(--mono);
    font-size: 12.5px;
    line-height: 1.55;
    margin: 0;
    padding: 10px 12px;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--output);
}
.term.muted { color: var(--text-faint); }
#vmResult { color: var(--accent-hi); }
#vmExecutedCode { color: var(--text-muted); border-top: 1px dashed var(--border-soft); }
.vmOutputDivEmpty { color: var(--text-faint) !important; font-style: italic; }
.vmOutputDivInfo { color: #d6e85a !important; }
.vmOutputDivError { color: var(--error) !important; }

/* ---- Problems list ---- */

.problems { padding: 4px 0; }
.problems-empty { padding: 10px 14px; color: var(--text-faint); font-size: 12.5px; font-style: italic; }
.problem-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 4px 14px;
    font-size: 12.5px;
    cursor: pointer;
}
.problem-row:hover { background: var(--bg-elevated); }
.problem-icon { flex: 0 0 auto; font-size: 12px; }
.problem-msg { color: var(--text); flex: 1; }
.problem-loc { color: var(--text-faint); font-family: var(--mono); font-size: 11px; white-space: nowrap; }

.sev-error   { color: var(--error); }
.sev-warning { color: var(--warning); }
.sev-info    { color: var(--info); }

/* ---- Transpile tabs ---- */

.translate-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: #12161d;
    border-bottom: 1px solid var(--border-soft);
}
.translate-hint { color: var(--text-faint); font-size: 11px; }

.conversionTabs { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; padding: 6px 10px; }
.conversionTabs .conv-from { color: var(--text-faint); font-family: var(--mono); font-size: 11px; margin-right: 4px; }
.conv-tab { padding: 3px 9px; margin: 0; font-size: 11px; font-family: var(--mono); }
.conv-tab-active { background: var(--accent); color: #04130a; border-color: var(--accent); }
.conv-tab-active:hover { background: var(--accent-hi); color: #04130a; }
#conversionOutput { color: var(--output); }

/* ---- Status bar ---- */

.statusbar {
    display: flex;
    align-items: center;
    gap: 16px;
    height: 24px;
    padding: 0 12px;
    background: linear-gradient(180deg, var(--bg-panel), #10141b);
    border-top: 1px solid var(--border);
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--mono);
}
.sb-item { display: inline-flex; align-items: center; gap: 5px; }
.sb-diag { gap: 12px; }
.sb-grow { flex: 1; }

/* ---- Form controls ---- */

input, select {
    background: var(--bg-input);
    color: var(--accent);
    border-radius: 5px;
    outline: none;
    border: 1px solid var(--border);
    padding: 4px 7px;
    font-family: var(--mono);
    font-size: 12px;
}
input { text-transform: none; letter-spacing: 0; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-dim); }

button {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    font-family: var(--ui);
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-elevated);
    color: var(--accent);
    cursor: pointer;
    transition: background-color .15s, border-color .15s, color .15s;
    white-space: nowrap;
}
button:hover { border-color: var(--accent); color: var(--accent-hi); background: #232c3a; }
button:active { transform: translateY(1px); }

.btn-run {
    background: var(--accent);
    color: #04130a;
    border-color: var(--accent);
    font-weight: 700;
}
.btn-run:hover { background: var(--accent-hi); color: #04130a; }

/* ---- Hover tooltip ---- */

.hovertip {
    position: fixed;
    z-index: 100;
    max-width: 460px;
    max-height: 260px;
    overflow: auto;
    padding: 8px 10px;
    background: #10151d;
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 6px 24px rgba(0,0,0,.5);
    font-size: 12px;
    color: var(--text);
    pointer-events: none;
}
.hovertip.hidden { display: none; }

/* ---- Completion popup ---- */

.completion {
    position: fixed;
    z-index: 120;
    min-width: 220px;
    max-width: 340px;
    max-height: 242px;
    overflow-y: auto;
    padding: 3px;
    background: #10151d;
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, .55);
    font-family: var(--mono);
    font-size: 12.5px;
}
.completion.hidden { display: none; }
.comp-row {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 22px;
    padding: 0 8px;
    border-radius: 4px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
}
.comp-row.sel { background: var(--accent-dim); }
.comp-row:hover { background: var(--bg-elevated); }
.comp-label { color: var(--text); }
.comp-detail { color: var(--text-faint); font-size: 11px; margin-left: auto; padding-left: 10px; }
.comp-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px; height: 16px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 700;
    flex: 0 0 auto;
}
.comp-keyword { background: rgba(86,156,214,.16); color: #569cd6; }
.hover-body { margin: 0; font-family: var(--mono); font-size: 12px; white-space: pre-wrap; color: var(--text); }
.hover-sev { margin-right: 4px; }

/* Scrollbars */
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-thumb { background: #2a313c; border-radius: 6px; border: 3px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: #3a424f; background-clip: padding-box; }
::-webkit-scrollbar-track { background: transparent; }