:root {
  --bg: #f4f6f9; --panel: #ffffff; --ink: #1c2430; --muted: #5f6b7a; --line: #d9dee6; --soft: #eef2f7;
  --accent: #2463c9; --accent-ink: #ffffff; --accent2: #0e8a6b; --danger: #c62828; --warn-bg: #fff4d6; --warn-ink: #7a5300;
  --code-bg: #fbfcfe; --wave-bg: #ffffff; --wave-grid: #e8ecf2; --wave-line: #11804a; --wave-bus: #1d5fbf;
  --wave-x: #d33b3b; --wave-z: #c08a00; --wave-text: #1c2430; --wave-cursor: #e0761a; --sel: #dbe7fb;
  --mono: "JetBrains Mono", "Cascadia Code", "Fira Code", Consolas, "DejaVu Sans Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11151b; --panel: #181e26; --ink: #e3e8ef; --muted: #98a3b3; --line: #2b3440; --soft: #202833;
    --accent: #5b93f0; --accent-ink: #0b1220; --accent2: #3cc29d; --danger: #ff6b6b; --warn-bg: #3a2f10; --warn-ink: #f4d27a;
    --code-bg: #141a21; --wave-bg: #12171e; --wave-grid: #222b36; --wave-line: #4bd38a; --wave-bus: #6ea7ff;
    --wave-x: #ff6b6b; --wave-z: #f0c040; --wave-text: #e3e8ef; --wave-cursor: #ffa24d; --sel: #23324a;
  }
}
:root[data-theme="dark"] {
  --bg: #11151b; --panel: #181e26; --ink: #e3e8ef; --muted: #98a3b3; --line: #2b3440; --soft: #202833;
  --accent: #5b93f0; --accent-ink: #0b1220; --accent2: #3cc29d; --danger: #ff6b6b; --warn-bg: #3a2f10; --warn-ink: #f4d27a;
  --code-bg: #141a21; --wave-bg: #12171e; --wave-grid: #222b36; --wave-line: #4bd38a; --wave-bus: #6ea7ff;
  --wave-x: #ff6b6b; --wave-z: #f0c040; --wave-text: #e3e8ef; --wave-cursor: #ffa24d; --sel: #23324a;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 15px; line-height: 1.5; }
code, pre { font-family: var(--mono); }
button, select, input, .button { font: inherit; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 18px; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { font-size: 19px; margin: 0; line-height: 1.3; }
.brand p { margin: 0; color: var(--muted); font-size: 13px; }
.logo { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); font-size: 24px; }
.top-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

select, input { background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: 8px; padding: 5px 8px; }
button, .button { cursor: pointer; border-radius: 8px; border: 1px solid var(--line); background: var(--soft); color: var(--ink); padding: 6px 12px; display: inline-flex; align-items: center; gap: 4px; }
button:hover, .button:hover { border-color: var(--accent); }
button:disabled { opacity: .55; cursor: wait; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 700; }
button.primary.alt { background: var(--accent2); border-color: var(--accent2); }
.ghost { background: transparent; }
.small { padding: 3px 9px; font-size: 13px; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 14px; padding: 14px 18px; align-items: start; }
@media (max-width: 1100px) { .layout { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 600px) {
  .layout { padding: 10px 16px; } .top { padding: 10px 16px; }
  .top-tools { width: 100%; flex-wrap: nowrap; } #examples { flex: 1; min-width: 0; }
}
.pane { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; min-width: 0; }

.file-bar { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 6px 8px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.file-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.file-tab { font-family: var(--mono); font-size: 13px; padding: 3px 6px 3px 10px; border-radius: 7px; border: 1px solid transparent; background: transparent; }
.file-tab.active { background: var(--sel); border-color: var(--accent); }
.file-tab .x { margin-left: 6px; color: var(--muted); padding: 0 3px; border-radius: 4px; }
.file-tab .x:hover { color: var(--danger); }
.file-actions { display: flex; gap: 4px; }

.editor { height: 58vh; min-height: 320px; }
.editor .CodeMirror { height: 100%; font-family: var(--mono); font-size: 13.5px; background: var(--code-bg); color: var(--ink); }
.CodeMirror-gutters { background: var(--soft); border-right: 1px solid var(--line); }
.CodeMirror-linenumber { color: var(--muted); }
.CodeMirror-cursor { border-left-color: var(--ink); }
.CodeMirror-selected { background: var(--sel) !important; }
.cm-line-error { background: rgba(214, 48, 49, .14); }
.cm-line-warning { background: rgba(230, 160, 0, .14); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .cm-s-default .cm-keyword { color: #c792ea; }
  :root:not([data-theme="light"]) .cm-s-default .cm-string { color: #c3e88d; }
  :root:not([data-theme="light"]) .cm-s-default .cm-comment { color: #7f8c98; }
  :root:not([data-theme="light"]) .cm-s-default .cm-number { color: #f78c6c; }
  :root:not([data-theme="light"]) .cm-s-default .cm-builtin { color: #82aaff; }
  :root:not([data-theme="light"]) .cm-s-default .cm-variable { color: #e3e8ef; }
  :root:not([data-theme="light"]) .cm-s-default .cm-variable-2 { color: #89ddff; }
  :root:not([data-theme="light"]) .cm-s-default .cm-meta { color: #ffcb6b; }
  :root:not([data-theme="light"]) .cm-s-default .cm-atom { color: #f78c6c; }
}

.run-bar { display: flex; flex-wrap: wrap; gap: 10px 18px; padding: 10px; border-top: 1px solid var(--line); align-items: center; }
.run-group { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.run-group label { display: inline-flex; gap: 6px; align-items: center; color: var(--muted); font-size: 13.5px; }
.run-group select { min-width: 9em; font-family: var(--mono); font-size: 13px; }
.status { padding: 0 10px 10px; min-height: 1.6em; color: var(--muted); font-size: 13.5px; }
.status.err { color: var(--danger); }
.spinner { display: inline-block; width: 12px; height: 12px; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -1px; margin-left: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }

.out-tabs { display: flex; gap: 2px; padding: 6px 6px 0; border-bottom: 1px solid var(--line); overflow-x: auto; }
.out-tabs button { border: none; border-radius: 8px 8px 0 0; background: transparent; padding: 7px 14px; color: var(--muted); white-space: nowrap; }
.out-tabs button.active { background: var(--soft); color: var(--ink); font-weight: 700; box-shadow: inset 0 -2px 0 var(--accent); }
.out-tabs button .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent2); display: inline-block; }
.out { display: none; padding: 10px; }
.out.active { display: block; }
.log { margin: 0; white-space: pre-wrap; word-break: break-word; font-size: 12.5px; background: var(--code-bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px; max-height: 62vh; overflow: auto; text-align: left; }
.diag { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; }
.diag button { justify-content: flex-start; text-align: left; direction: ltr; font-family: var(--mono); font-size: 12.5px; border-color: transparent; background: rgba(214, 48, 49, .1); white-space: normal; }
.diag button.warning { background: rgba(230, 160, 0, .12); }
.banner { border-radius: 8px; padding: 8px 12px; margin-bottom: 8px; font-size: 14px; }
.banner.warn { background: var(--warn-bg); color: var(--warn-ink); }
.banner.err { background: rgba(214, 48, 49, .12); color: var(--danger); }
.banner.ok { background: rgba(14, 138, 107, .12); color: var(--accent2); }
.empty { color: var(--muted); }

.view-head { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: flex-start; margin-bottom: 8px; }
.view-head .banner { flex-basis: 100%; margin: 0; }
.stats { display: flex; gap: 8px; flex-wrap: wrap; }
.stat { background: var(--soft); border: 1px solid var(--line); border-radius: 10px; padding: 6px 12px; min-width: 76px; text-align: center; }
.stat b { display: block; font-size: 22px; line-height: 1.2; font-family: var(--mono); }
.stat span { font-size: 12px; color: var(--muted); }
.cells { border-collapse: collapse; font-size: 13px; direction: ltr; }
.cells td, .cells th { border: 1px solid var(--line); padding: 2px 10px; font-family: var(--mono); }
.cells th { background: var(--soft); font-family: var(--sans); font-weight: 700; }
.cells td.fa { font-family: var(--sans); color: var(--muted); }
.tools-row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; margin-inline-start: auto; }

.schem { position: relative; border: 1px solid var(--line); border-radius: 8px; background: #ffffff; overflow: auto; height: 56vh; min-height: 300px; cursor: grab; }
.schem.dragging { cursor: grabbing; }
.schem svg { display: block; }
.schem .note { color: #5f6b7a; padding: 20px; font-family: var(--sans); }

.wave-host { min-height: 120px; }
.wave-toolbar { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-bottom: 8px; }
.wave-toolbar .sep { flex: 1; }
.wave-scroll { border: 1px solid var(--line); border-radius: 8px; overflow-y: auto; max-height: 62vh; background: var(--wave-bg); touch-action: none; }
.wave-scroll canvas { display: block; width: 100%; cursor: crosshair; }
.sig-picker { margin-top: 8px; }
.sig-picker summary { cursor: pointer; color: var(--muted); }
.sig-list { direction: ltr; text-align: left; columns: 3 220px; font-family: var(--mono); font-size: 12.5px; padding: 6px; }
.sig-list label { display: block; break-inside: avoid; }
.sig-list .scope { color: var(--muted); font-weight: 700; margin-top: 4px; }

.foot { color: var(--muted); font-size: 12.5px; padding: 0 18px 18px; }

.help { max-width: 720px; width: calc(100% - 32px); border: 1px solid var(--line); border-radius: 14px; background: var(--panel); color: var(--ink); padding: 18px 22px; }
.help::backdrop { background: rgba(0, 0, 0, .45); }
.help h2 { margin-top: 0; }
.help li { margin-bottom: 8px; }
.help .close { float: right; font-size: 20px; padding: 0 10px; }