:root {
  --bg: #f4f2ee; --panel: #ffffff; --panel2: #faf9f7; --line: #e3dfd7; --text: #1f2421; --muted: #6b716d;
  --accent: #0f766e; --accent-ink: #ffffff; --accent-soft: #d9f0ec; --warn: #b45309; --warn-soft: #fdf0dc;
  --err: #b42318; --err-soft: #fde8e6; --info-soft: #e8eef7; --shadow: 0 10px 30px rgba(20, 25, 22, .16);
  --radius: 10px; --top: 56px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171a; --panel: #1c2024; --panel2: #181b1f; --line: #2c3238; --text: #e6e8e6; --muted: #98a09b;
    --accent: #2dd4bf; --accent-ink: #06201c; --accent-soft: #123a35; --warn: #f5b361; --warn-soft: #3a2b14;
    --err: #ff8a80; --err-soft: #3d1c19; --info-soft: #1d2836; --shadow: 0 10px 30px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; display: flex; flex-direction: column; overflow: hidden; }
button, select, input, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

/* barra superior */
.top { height: var(--top); flex: none; display: flex; align-items: center; gap: 12px; padding: 0 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; }
.brand b { display: block; font-size: 15px; line-height: 1.1; }
.brand small { color: var(--muted); font-size: 11.5px; }
.logo { width: 32px; height: 32px; border-radius: 9px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-weight: 800; }
.fileinfo { color: var(--muted); max-width: 26vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-left: 12px; border-left: 1px solid var(--line); }
.fileinfo:empty { display: none; }
.spacer { flex: 1; }

.btn { border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 7px 13px; cursor: pointer; transition: background .12s, border-color .12s; }
.btn:hover:not(:disabled) { background: var(--panel2); border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--accent); }
.btn.ghost { background: transparent; }
.btn.sm { padding: 3px 9px; font-size: 12.5px; }
.btn.lg { padding: 12px 22px; font-size: 16px; border-radius: 10px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; background: var(--panel2); }
.seg button { border: 0; background: transparent; padding: 6px 12px; cursor: pointer; color: var(--muted); }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.on { background: var(--accent); color: var(--accent-ink); font-weight: 600; }

.banner { display: flex; align-items: center; gap: 10px; padding: 8px 16px; background: var(--info-soft); border-bottom: 1px solid var(--line); }

/* disposición principal */
.layout { flex: 1; min-height: 0; display: grid; grid-template-columns: 270px minmax(0, 1fr) 330px; }
.side { background: var(--panel); display: flex; flex-direction: column; min-height: 0; }
.side.left { border-right: 1px solid var(--line); }
.side.right { border-left: 1px solid var(--line); }
.tabs { display: flex; border-bottom: 1px solid var(--line); flex: none; }
.tabs button { flex: 1; border: 0; background: transparent; padding: 11px 6px; cursor: pointer; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs button.on { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.pane { display: none; flex: 1; min-height: 0; overflow: auto; }
.pane.on { display: block; }
.pane-pad { padding: 14px; }
.pane-head { display: flex; gap: 8px; align-items: center; justify-content: space-between; padding: 12px 14px 4px; color: var(--muted); font-size: 12.5px; }
.badge { display: inline-block; min-width: 18px; padding: 0 5px; border-radius: 9px; background: var(--err); color: #fff; font-size: 11px; line-height: 18px; text-align: center; }
.badge.warn { background: var(--warn); }
.note { color: var(--muted); font-size: 12.5px; margin: 0 0 10px; }

/* capítulos */
.chapters { list-style: none; margin: 0; padding: 6px; }
.chapters li { display: flex; align-items: center; gap: 6px; padding: 7px 8px; border-radius: 8px; cursor: pointer; }
.chapters li:hover { background: var(--panel2); }
.chapters li.on { background: var(--accent-soft); }
.chapters .n { color: var(--muted); font-size: 11.5px; width: 22px; text-align: right; flex: none; }
.chapters .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chapters .t small { display: block; color: var(--muted); font-size: 11px; overflow: hidden; text-overflow: ellipsis; }
.chapters .ops { display: none; gap: 2px; flex: none; }
.chapters li:hover .ops, .chapters li.on .ops { display: flex; }
.chapters .ops button { border: 0; background: transparent; cursor: pointer; padding: 2px 5px; border-radius: 5px; color: var(--muted); }
.chapters .ops button:hover { background: var(--line); color: var(--text); }
.tag { font-size: 10.5px; padding: 0 6px; border-radius: 6px; background: var(--warn-soft); color: var(--warn); flex: none; }

/* diagnóstico */
.issue { margin: 10px 12px; padding: 11px 12px; border: 1px solid var(--line); border-left: 4px solid var(--warn); border-radius: 8px; background: var(--panel2); }
.issue.error { border-left-color: var(--err); }
.issue.info { border-left-color: #4b7bbd; }
.issue h4 { margin: 0 0 4px; font-size: 13.5px; }
.issue p { margin: 0 0 8px; color: var(--muted); font-size: 12.5px; }
.issue ul { margin: 0 0 8px; padding: 0; list-style: none; font-size: 12px; max-height: 120px; overflow: auto; }
.issue li { padding: 2px 0; color: var(--muted); }
.issue li a { color: var(--accent); cursor: pointer; text-decoration: underline; }
.ok { margin: 18px 14px; padding: 14px; border-radius: 8px; background: var(--accent-soft); }

/* escenario */
.stage { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }
.stagebar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; padding: 8px 14px; border-bottom: 1px solid var(--line); background: var(--panel); font-size: 12.5px; }
.stagebar label { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); }
.stagebar select, .stagebar input[type=number] { border: 1px solid var(--line); background: var(--panel); border-radius: 6px; padding: 3px 6px; color: var(--text); }
.stagebar input[type=number] { width: 66px; }
.group { display: inline-flex; align-items: center; gap: 4px; }
.val { min-width: 26px; text-align: center; }
.hint { color: var(--muted); font-size: 12px; }
.editbar { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; padding: 6px 12px; border-bottom: 1px solid var(--line); background: var(--panel); }
.editbar button, .editbar select { border: 1px solid transparent; background: transparent; border-radius: 6px; padding: 4px 9px; cursor: pointer; }
.editbar select { border-color: var(--line); background: var(--panel); }
.editbar button:hover { background: var(--panel2); border-color: var(--line); }
.editbar button.on { background: var(--accent-soft); border-color: var(--accent); }
.editbar button:disabled { opacity: .35; cursor: default; }
.editbar i { width: 1px; align-self: stretch; background: var(--line); margin: 3px 4px; }

.viewport { flex: 1; min-height: 0; overflow: auto; display: flex; padding: 22px; }
.holder { margin: auto; flex: none; }
.device { background: #0e1114; border-radius: 22px; padding: 12px; box-shadow: var(--shadow); transform-origin: top left; }
.device.mini { padding: 0; border-radius: 4px; }
.screen { background: #fff; border-radius: 10px; overflow: hidden; position: relative; }
.screen iframe { display: block; border: 0; background: #fff; }
.pager { flex: none; display: flex; justify-content: center; align-items: center; gap: 14px; padding: 8px; border-top: 1px solid var(--line); background: var(--panel); }
.pinfo { min-width: 180px; text-align: center; color: var(--muted); font-variant-numeric: tabular-nums; }

/* formularios laterales */
.presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.fgroup { margin: 14px 0 6px; font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--line); padding-bottom: 4px; }
.frow { display: grid; grid-template-columns: 22px 1fr 54px; align-items: center; gap: 6px 8px; padding: 5px 0; }
.frow.plain { grid-template-columns: 1fr; }
.frow label { cursor: pointer; }
.frow input[type=range] { grid-column: 2 / 3; width: 100%; accent-color: var(--accent); }
.frow .rv { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; font-size: 12px; }
.frow.off label, .frow.off .rv { color: var(--muted); }
.frow.off input[type=range] { opacity: .4; }
.field { display: block; margin: 0 0 10px; }
.field > span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 3px; }
.field input[type=text], .field textarea, .field select, #codeFile { width: 100%; border: 1px solid var(--line); background: var(--panel); border-radius: 7px; padding: 6px 8px; }
.field textarea { min-height: 80px; resize: vertical; }
.check { display: flex; gap: 8px; align-items: flex-start; padding: 4px 0; cursor: pointer; }
.check input { margin-top: 3px; accent-color: var(--accent); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.seg2 { display: inline-flex; border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.seg2 button { border: 0; background: var(--panel); padding: 4px 10px; cursor: pointer; }
.seg2 button + button { border-left: 1px solid var(--line); }
.seg2 button.on { background: var(--accent-soft); font-weight: 600; }
.codepane { display: flex; flex-direction: column; gap: 8px; height: 100%; }
#codeArea { flex: 1; min-height: 260px; width: 100%; font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; border: 1px solid var(--line); border-radius: 7px; padding: 8px; background: var(--panel); resize: none; tab-size: 2; white-space: pre; }
.cover { width: 110px; border-radius: 6px; box-shadow: 0 3px 10px rgba(0,0,0,.25); display: block; margin-bottom: 8px; }
.kv { color: var(--muted); font-size: 12px; margin: 10px 0 0; }

/* bienvenida */
.welcome { flex: 1; display: grid; place-items: center; padding: 24px; overflow: auto; }
.welcome .card { max-width: 640px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 36px; box-shadow: var(--shadow); }
.welcome h1 { margin: 0 0 12px; font-size: 28px; line-height: 1.15; letter-spacing: -.01em; }
.welcome p { color: var(--muted); font-size: 15px; margin: 0 0 22px; }
.feats { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 10px; color: var(--muted); font-size: 13px; }
.feats b { color: var(--text); margin-right: 6px; }
.drop { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 80%, transparent); color: var(--accent-ink); font-size: 24px; font-weight: 700; border: 6px dashed var(--accent-ink); }
.toast { position: fixed; bottom: 22px; left: 50%; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; z-index: 60; max-width: 80vw; background: #1b1f1d; color: #fff; padding: 10px 16px; border-radius: 10px; box-shadow: var(--shadow); transition: .2s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.busy { position: fixed; inset: 0; z-index: 70; display: flex; gap: 12px; align-items: center; justify-content: center; background: rgba(0,0,0,.35); color: #fff; font-weight: 600; }
.spin { width: 22px; height: 22px; border: 3px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: sp .8s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }

@media (max-width: 1100px) { .layout { grid-template-columns: 220px minmax(0,1fr) 290px; } .brand small { display: none; } }
@media (max-width: 860px) {
  body { overflow: auto; }
  .layout { display: flex; flex-direction: column; }
  .side { max-height: 40vh; }
  .stage { min-height: 70vh; }
  .top { flex-wrap: wrap; height: auto; padding: 8px 12px; }
}