:root {
  --bg: #eef0f5;
  --panel: #ffffff;
  --panel-2: #f7f8fb;
  --border: #d7dae5;
  --text: #1c1f2b;
  --muted: #62687e;
  --accent: #4f5b93;
  --accent-ink: #ffffff;
  --accent-soft: #e4e7f4;
  --ok: #2c7a3f;
  --warn: #9a6400;
  --err: #b3261e;
  --code-bg: #fbfbfd;
  --term-bg: #10121a;
  --term-text: #d6dae8;
  --shadow: 0 1px 2px rgba(20, 24, 40, .06), 0 4px 16px rgba(20, 24, 40, .06);
  --radius: 8px;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  /* editor tokens */
  --tok-keyword: #7a3e9d;
  --tok-var: #1f5fa8;
  --tok-string: #a3401c;
  --tok-number: #0b7a75;
  --tok-comment: #7d8397;
  --tok-tag: #245a8f;
  --tok-attr: #8a5a00;
  --tok-meta: #b3261e;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12131a;
    --panel: #1b1d27;
    --panel-2: #20222e;
    --border: #2e3142;
    --text: #e4e6ef;
    --muted: #9ba1b9;
    --accent: #8f9ad0;
    --accent-ink: #12131a;
    --accent-soft: #2a2e45;
    --ok: #6cc486;
    --warn: #e0b050;
    --err: #ff8a80;
    --code-bg: #171922;
    --term-bg: #0b0c11;
    --term-text: #d6dae8;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
    --tok-keyword: #c792ea;
    --tok-var: #82aaff;
    --tok-string: #f0a07a;
    --tok-number: #7fdbca;
    --tok-comment: #7b819a;
    --tok-tag: #89b4fa;
    --tok-attr: #e5c07b;
    --tok-meta: #ff8a80;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12131a;
  --panel: #1b1d27;
  --panel-2: #20222e;
  --border: #2e3142;
  --text: #e4e6ef;
  --muted: #9ba1b9;
  --accent: #8f9ad0;
  --accent-ink: #12131a;
  --accent-soft: #2a2e45;
  --ok: #6cc486;
  --warn: #e0b050;
  --err: #ff8a80;
  --code-bg: #171922;
  --term-bg: #0b0c11;
  --term-text: #d6dae8;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
  --tok-keyword: #c792ea;
  --tok-var: #82aaff;
  --tok-string: #f0a07a;
  --tok-number: #7fdbca;
  --tok-comment: #7b819a;
  --tok-tag: #89b4fa;
  --tok-attr: #e5c07b;
  --tok-meta: #ff8a80;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 var(--sans);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
button, input, select, textarea { font: inherit; color: inherit; }
code, kbd { font-family: var(--mono); font-size: .92em; }
kbd { border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 4px; padding: 0 5px; background: var(--panel); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.muted { color: var(--muted); }
[hidden] { display: none !important; }

/* Top bar ------------------------------------------------------------------ */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex: none;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.logo {
  flex: none;
  display: inline-grid; place-items: center;
  width: 52px; height: 30px; border-radius: 50%;
  background: #4f5b93; color: #fff;
  font: italic 700 16px/1 Arial, Helvetica, sans-serif; letter-spacing: -.5px;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,.18);
}
.brand-text { min-width: 0; }
.brand h1 { margin: 0; font-size: 16px; font-weight: 650; letter-spacing: -.01em; white-space: nowrap; }
.brand p { margin: 0; font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.top-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

.btn {
  border: 1px solid var(--border); background: var(--panel); border-radius: 6px;
  padding: 5px 12px; cursor: pointer; white-space: nowrap;
}
.btn:hover { background: var(--panel-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.primary:disabled { opacity: .6; cursor: progress; }
.btn.ghost { background: transparent; }
.icon-btn {
  border: 1px solid transparent; background: transparent; border-radius: 6px;
  width: 28px; height: 28px; display: inline-grid; place-items: center; cursor: pointer; font-size: 15px; color: var(--muted);
}
.icon-btn:hover:not(:disabled) { background: var(--panel-2); border-color: var(--border); color: var(--text); }
.icon-btn:disabled { opacity: .35; cursor: default; }
.link-btn { border: 0; background: none; color: var(--accent); cursor: pointer; padding: 0; font-size: 12px; }
.link-btn:hover { text-decoration: underline; }
.link-btn.danger { color: var(--err); }
select, input[type="text"], input[type="number"], textarea {
  background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 5px 8px;
}
textarea { font-family: var(--mono); font-size: 12.5px; resize: vertical; }
.select-wrap select { max-width: 220px; }

.engine-status { font-size: 12px; padding: 3px 8px; border-radius: 999px; background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); white-space: nowrap; }
.engine-status.ready { color: var(--ok); }
.engine-status.busy { color: var(--warn); }
.engine-status.error { color: var(--err); }

/* Layout ------------------------------------------------------------------- */
.layout {
  flex: 1; min-height: 0;
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px; padding: 10px;
}
.pane {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex; flex-direction: column; min-height: 0; min-width: 0; overflow: hidden;
}
.pane-head {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 6px 8px 6px 12px; border-bottom: 1px solid var(--border); background: var(--panel-2);
  min-height: 42px; flex: none;
}
.pane-title { font-size: 12px; font-weight: 650; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.pane-tools { display: flex; align-items: center; gap: 8px; }

/* Files -------------------------------------------------------------------- */
.file-tree { flex: 1; overflow: auto; padding: 6px 0; font-size: 13px; }
.tree-dir { padding: 3px 12px; color: var(--muted); font-size: 12px; font-family: var(--mono); display: flex; justify-content: space-between; align-items: center; }
.tree-file {
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
  padding: 3px 8px 3px 12px; cursor: pointer; font-family: var(--mono); font-size: 12.5px;
  border-left: 2px solid transparent;
}
.tree-file:hover { background: var(--panel-2); }
.tree-file.active { background: var(--accent-soft); border-left-color: var(--accent); }
.tree-file .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-file .meta { color: var(--muted); font-size: 11px; flex: none; }
.tree-file .del { visibility: hidden; border: 0; background: none; color: var(--muted); cursor: pointer; padding: 0 2px; }
.tree-file:hover .del { visibility: visible; }
.tree-file .del:hover { color: var(--err); }
.tree-file.server { font-style: italic; }
.files-foot { display: flex; justify-content: space-between; padding: 8px 12px; border-top: 1px solid var(--border); flex: none; }

/* Editor ------------------------------------------------------------------- */
.file-tab { font-family: var(--mono); font-size: 13px; display: flex; gap: 4px; align-items: center; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dirty { color: var(--accent); }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.seg-btn { border: 0; background: var(--panel); padding: 4px 10px; cursor: pointer; font-size: 12.5px; color: var(--muted); }
.seg-btn + .seg-btn { border-left: 1px solid var(--border); }
.seg-btn.active { background: var(--accent-soft); color: var(--text); font-weight: 600; }
.editor { flex: 1; min-height: 0; position: relative; }
.editor .CodeMirror { position: absolute; inset: 0; height: auto; font-family: var(--mono); font-size: 13px; line-height: 1.5; background: var(--code-bg); color: var(--text); }
.editor textarea.fallback { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; border-radius: 0; padding: 10px; background: var(--code-bg); font-size: 13px; resize: none; }
.CodeMirror-gutters { background: var(--panel-2); border-right: 1px solid var(--border); }
.CodeMirror-linenumber { color: var(--muted); }
.CodeMirror-cursor { border-left-color: var(--text); }
.CodeMirror-selected, .CodeMirror-focused .CodeMirror-selected { background: var(--accent-soft) !important; }
.CodeMirror-matchingbracket { color: var(--ok) !important; text-decoration: underline; }
.cm-s-default .cm-keyword { color: var(--tok-keyword); }
.cm-s-default .cm-variable-2, .cm-s-default .cm-variable-3 { color: var(--tok-var); }
.cm-s-default .cm-variable, .cm-s-default .cm-def, .cm-s-default .cm-property { color: var(--text); }
.cm-s-default .cm-string, .cm-s-default .cm-string-2 { color: var(--tok-string); }
.cm-s-default .cm-number, .cm-s-default .cm-atom { color: var(--tok-number); }
.cm-s-default .cm-comment { color: var(--tok-comment); font-style: italic; }
.cm-s-default .cm-tag, .cm-s-default .cm-bracket { color: var(--tok-tag); }
.cm-s-default .cm-attribute, .cm-s-default .cm-qualifier { color: var(--tok-attr); }
.cm-s-default .cm-meta { color: var(--tok-meta); font-weight: 600; }
.cm-s-default .cm-builtin { color: var(--tok-var); }
.cm-s-default .cm-operator { color: var(--muted); }

/* Browser ------------------------------------------------------------------ */
.browser-pane > #web-view, .browser-pane > #cli-view { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.browser-bar { display: flex; align-items: center; gap: 4px; padding: 6px 8px; border-bottom: 1px solid var(--border); background: var(--panel-2); flex: none; min-height: 42px; }
.url-form {
  flex: 1; min-width: 0; display: flex; align-items: center; gap: 6px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 999px; padding: 2px 4px 2px 6px;
}
.url-form:focus-within { border-color: var(--accent); }
.method { font: 600 10.5px/1 var(--mono); padding: 3px 6px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); flex: none; }
.url-host { color: var(--muted); font-family: var(--mono); font-size: 12.5px; flex: none; }
.url-form input { flex: 1; min-width: 0; border: 0; background: transparent; padding: 3px 0; font-family: var(--mono); font-size: 12.5px; outline: none; }

.tabs { display: flex; gap: 2px; padding: 0 8px; border-bottom: 1px solid var(--border); flex: none; overflow-x: auto; }
.tab { border: 0; background: none; padding: 7px 10px 6px; cursor: pointer; color: var(--muted); border-bottom: 2px solid transparent; font-size: 13px; white-space: nowrap; }
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.badge { display: inline-block; min-width: 16px; padding: 0 5px; border-radius: 999px; background: var(--err); color: #fff; font-size: 10.5px; line-height: 16px; text-align: center; font-weight: 600; }

.tab-panels { flex: 1; min-height: 0; position: relative; }
.tab-panel { position: absolute; inset: 0; overflow: auto; display: none; }
.tab-panel.active { display: block; }
.tab-panel[data-panel="page"] { overflow: hidden; background: #fff; }
#page-frame { width: 100%; height: 100%; border: 0; background: #fff; display: block; }
.empty-state { position: absolute; inset: 0; display: grid; place-items: center; color: #666; background: #fff; font-size: 13px; }
.code-view { margin: 0; padding: 10px 12px; font: 12.5px/1.5 var(--mono); white-space: pre-wrap; word-break: break-word; background: var(--code-bg); min-height: 100%; }
.code-view.small { min-height: 0; padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; max-height: 140px; overflow: auto; }
.code-view .hl-status { color: var(--accent); font-weight: 600; }
.code-view .hl-name { color: var(--tok-attr); }
.code-view .hl-dim { color: var(--muted); }
.code-view .hl-err { color: var(--err); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 12px; padding: 12px; }
.form-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.form-grid label.wide, .form-grid .wide { grid-column: 1 / -1; }
.form-grid input, .form-grid select, .form-grid textarea { color: var(--text); }
.form-grid small { font-weight: normal; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.label { font-size: 12px; color: var(--muted); }
.cookie-box { display: flex; flex-direction: column; gap: 4px; }
.hint { margin: 0 12px 12px; font-size: 12px; color: var(--muted); }

/* CLI ---------------------------------------------------------------------- */
#cli-view { background: var(--term-bg); color: var(--term-text); }
.term-bar { display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-bottom: 1px solid #262a38; font-family: var(--mono); font-size: 12.5px; flex-wrap: wrap; flex: none; }
.term-bar .prompt { color: #6cc486; }
.term-bar .cmd { color: #fff; font-weight: 600; }
.term-bar input { background: #171a24; border: 1px solid #2c3142; color: var(--term-text); font-family: var(--mono); font-size: 12.5px; padding: 3px 6px; border-radius: 4px; }
#cli-args { width: 9em; }
#cli-extra { flex: 1; min-width: 6em; }
.cli-script { color: #e5c07b; }
.stdin-label { display: flex; flex-direction: column; gap: 3px; padding: 6px 10px; font-size: 11px; color: #8d93ab; font-family: var(--mono); border-bottom: 1px solid #262a38; flex: none; }
.stdin-label textarea { background: #171a24; border-color: #2c3142; color: var(--term-text); }
.terminal { flex: 1; min-height: 0; margin: 0; padding: 10px 12px; overflow: auto; font: 12.5px/1.5 var(--mono); white-space: pre-wrap; word-break: break-word; }
.terminal .exit { color: #8d93ab; }
.terminal .exit.bad { color: #ff8a80; }
.terminal .stderr { color: #ff8a80; }

/* Status bar --------------------------------------------------------------- */
.statusbar { flex: none; display: flex; align-items: center; gap: 10px; padding: 4px 12px; border-top: 1px solid var(--border); font: 11.5px/1.6 var(--mono); color: var(--muted); background: var(--panel-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.statusbar .ok { color: var(--ok); font-weight: 600; }
.statusbar .redir { color: var(--warn); font-weight: 600; }
.statusbar .bad { color: var(--err); font-weight: 600; }

/* Drawer ------------------------------------------------------------------- */
.drawer { position: fixed; inset: 0; background: rgba(10, 12, 20, .35); display: flex; justify-content: flex-end; z-index: 20; }
.drawer-inner { width: min(420px, 100%); height: 100%; background: var(--panel); border-left: 1px solid var(--border); padding: 16px 18px; overflow: auto; display: flex; flex-direction: column; gap: 14px; box-shadow: var(--shadow); }
.drawer h2 { margin: 0; font-size: 16px; }
.drawer p { margin: 0; font-size: 13px; }
.drawer label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; font-weight: 600; }
.drawer label small { font-weight: normal; }
.drawer label.check { flex-direction: row; align-items: center; font-weight: normal; gap: 8px; }
.setting-block { display: flex; flex-direction: column; gap: 4px; }
.setting-block small { font-size: 12px; line-height: 1.45; }

.toast { position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); background: var(--text); color: var(--panel); padding: 8px 14px; border-radius: 8px; font-size: 13px; z-index: 30; box-shadow: var(--shadow); max-width: calc(100% - 32px); }

/* Responsive --------------------------------------------------------------- */
@media (max-width: 1100px) {
  .layout { grid-template-columns: 180px minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) minmax(0, 1fr); }
  .browser-pane { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  body { overflow: auto; height: auto; }
  .topbar { flex-wrap: wrap; padding: 10px 16px; }
  .brand p { display: none; }
  .layout { display: flex; flex-direction: column; padding: 10px 16px; }
  .files-pane { max-height: 200px; }
  .editor-pane { height: 55vh; }
  .browser-pane { height: 75vh; }
  .form-grid { grid-template-columns: 1fr; }
  .select-wrap select { max-width: 150px; }
}

/* About modal: an archive exhibit card -------------------------------------- */
:root {
  --about-bg: #f3ead3;
  --about-bg-2: #e9dcbc;
  --about-ink: #3b2f22;
  --about-muted: #7a6547;
  --about-accent: #8a5a2b;
  --about-edge: #c9b48a;
  --about-backdrop: rgba(24, 18, 10, .62);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --about-bg: #221b12;
    --about-bg-2: #19140d;
    --about-ink: #eadcbd;
    --about-muted: #b59f7a;
    --about-accent: #e0a85a;
    --about-edge: #5a4629;
    --about-backdrop: rgba(0, 0, 0, .72);
  }
}
:root[data-theme="dark"] {
  --about-bg: #221b12;
  --about-bg-2: #19140d;
  --about-ink: #eadcbd;
  --about-muted: #b59f7a;
  --about-accent: #e0a85a;
  --about-edge: #5a4629;
  --about-backdrop: rgba(0, 0, 0, .72);
}
.about {
  border: 0; padding: 0; background: transparent; color: var(--about-ink);
  width: min(560px, calc(100% - 32px)); max-height: calc(100% - 32px); overflow: visible;
}
.about::backdrop { background: var(--about-backdrop); backdrop-filter: blur(3px); }
.about[open] { animation: about-in .45s ease-out; }
@keyframes about-in { from { opacity: 0; transform: translateY(10px) scale(.985); } }
.about-card {
  position: relative; max-height: calc(100vh - 32px); overflow: auto;
  padding: 26px 40px 28px; text-align: center; border-radius: 6px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255, 200, 110, .22), transparent 60%),
    radial-gradient(ellipse at 50% 120%, var(--about-bg-2), var(--about-bg) 70%);
  border: 1px solid var(--about-edge);
  box-shadow: 0 0 0 6px var(--about-bg), 0 0 0 7px var(--about-edge), 0 24px 60px rgba(0, 0, 0, .45);
  font-family: "IM Fell English", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}
.about-candle { width: 58px; height: 87px; display: block; margin: 0 auto 6px; overflow: visible; }
.about-fire { transform-origin: 40px 44px; animation: about-flicker 2.6s ease-in-out infinite; }
.about-halo { transform-origin: 40px 34px; animation: about-halo 2.6s ease-in-out infinite; }
@keyframes about-flicker {
  0%, 100% { transform: scale(1, 1) skewX(0deg); }
  20% { transform: scale(.96, 1.04) skewX(1.5deg); }
  45% { transform: scale(1.03, .96) skewX(-1deg); }
  70% { transform: scale(.98, 1.05) skewX(2deg); }
}
@keyframes about-halo { 0%, 100% { opacity: 1; transform: scale(1); } 45% { opacity: .8; transform: scale(.94); } }
@media (prefers-reduced-motion: reduce) {
  .about[open], .about-fire, .about-halo { animation: none; }
}
.about-kicker {
  margin: 0; color: var(--about-muted); letter-spacing: .14em; font-size: 13px;
  font-family: "IM Fell English SC", "IM Fell English", Georgia, serif; text-transform: lowercase;
}
.about h2 { margin: 2px 0 0; font-weight: normal; font-size: clamp(26px, 6vw, 34px); line-height: 1.15; color: var(--about-ink); }
.about-rule { display: flex; align-items: center; gap: 12px; margin: 10px auto 14px; max-width: 280px; color: var(--about-accent); }
.about-rule::before, .about-rule::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, transparent, var(--about-edge)); }
.about-rule::after { transform: scaleX(-1); }
.about-text { text-align: left; font-size: 17.5px; line-height: 1.6; hyphens: auto; }
.about-text p { margin: 0 0 .7em; text-indent: 1.4em; }
.about-text p:first-child { text-indent: 0; }
.about-text p:first-child::first-letter {
  float: left; font-size: 3.3em; line-height: .82; padding: .06em .08em 0 0; color: var(--about-accent);
}
.about-provenance { margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--about-edge); font-size: 13px; font-style: italic; color: var(--about-muted); line-height: 1.5; }
.about-source { color: inherit; text-decoration: underline dotted; text-underline-offset: 2px; }
.about-source:hover { color: var(--about-accent); }
.about-actions { margin-top: 18px; }
.about-enter {
  font: inherit; font-size: 16px; letter-spacing: .02em; cursor: pointer;
  padding: 8px 22px; border-radius: 3px; color: var(--about-bg);
  background: var(--about-accent); border: 1px solid var(--about-accent);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, .18);
}
.about-enter:hover { filter: brightness(1.08); }
.about-enter:focus-visible, .about-close:focus-visible { outline: 2px solid var(--about-accent); outline-offset: 3px; }
.about-close {
  position: absolute; top: 8px; right: 10px; width: 30px; height: 30px; border: 0; border-radius: 50%;
  background: none; color: var(--about-muted); font-size: 22px; line-height: 1; cursor: pointer;
}
.about-close:hover { color: var(--about-ink); background: rgba(138, 90, 43, .12); }
@media (max-width: 520px) {
  .about-card { padding: 22px 20px 22px; }
  .about-text { font-size: 16.5px; }
}