/* Tema OSCURO por defecto (estilo Khipu). El modo claro se aplica abajo via
   @media (prefers-color-scheme: light), asi la app se despliega en el modo del
   navegador. color-scheme: dark light -> controles nativos (scrollbars, textarea)
   siguen tambien la preferencia del browser. */
:root {
  color-scheme: dark light;
  --bg: #0f1216;
  --panel: #171b22;
  --panel-2: #1e242d;
  --border: #2a313c;
  --text: #e6e9ef;
  --muted: #8b95a3;
  --accent: #6ea8fe;
  --accent-2: #3b6fd4;
  --user: #20303f;
  --tool: #2a2320;
  --tool-text: #d8b48a;  /* texto del tool-pill */
  --code-bg: #0c0f13;    /* fondo de code/pre */
  --ok: #5fd08a;
  --err: #e2725b;
}

/* Tema CLARO: se activa solo si el navegador prefiere modo claro. Redefine las
   mismas variables -> todos los estilos que usan var(--*) cambian a la vez. */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --panel: #f4f5f7;
    --panel-2: #e8eaee;
    --border: #d6dae1;
    --text: #1b2027;
    --muted: #5c6675;
    --accent: #2563eb;
    --accent-2: #2563eb;
    --user: #dbeafe;
    --tool: #f3ecdf;
    --tool-text: #8a5a1e;
    --code-bg: #f0f2f5;
    --ok: #1a9e54;
    --err: #c0392b;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: flex;
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* Sidebar */
#sidebar {
  width: 300px;
  flex: 0 0 300px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 18px 16px;
  overflow-y: auto;
}
.side-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
#sidebar h1 { font-size: 18px; margin: 0 0 4px; }
.sub { color: var(--muted); font-size: 13px; margin: 0 0 18px; }

/* Toggle del sidebar */
.side-toggle, .side-expand {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; padding: 0; flex: 0 0 auto;
  font-size: 16px; line-height: 1; cursor: pointer;
  background: var(--panel-2); color: var(--muted);
  border: 1px solid var(--border); border-radius: 7px;
}
.side-toggle:hover, .side-expand:hover { color: var(--text); border-color: var(--accent); }
.side-expand { display: none; position: fixed; top: 14px; left: 14px; z-index: 20; }
/* Estado comprimido: ocultar panel, mostrar botón flotante para expandir */
body.sidebar-collapsed #sidebar { display: none; }
body.sidebar-collapsed .side-expand { display: inline-flex; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.muted { color: var(--muted); font-weight: normal; font-size: 11px; }

/* Índice de contenidos (TOC) */
.toc details { margin-bottom: 4px; }
.toc summary {
  font-size: 13px; padding: 6px 8px; border-radius: 7px; cursor: pointer;
  user-select: none; color: var(--text);
}
.toc summary:hover { background: var(--panel-2); color: var(--accent); }
.toc .chapter-label {
  font-size: 12.5px; font-weight: 600; color: var(--muted);
  margin: 6px 0 2px 14px;
}
.tocbtn {
  display: block; width: calc(100% - 14px); margin: 2px 0 2px 14px;
  padding: 5px 8px; text-align: left; font-size: 12.5px; line-height: 1.4;
  background: transparent; color: var(--text);
  border: 1px solid transparent; border-radius: 7px; cursor: pointer;
  font-family: inherit;
}
.tocbtn:hover { background: var(--panel-2); border-color: var(--border); color: var(--accent); }
.tocbtn.section { margin-left: 26px; width: calc(100% - 26px); color: var(--muted); }
.tocbtn.section:hover { color: var(--accent); }

.reset {
  width: 100%; margin-top: 6px; padding: 9px; border-radius: 8px; cursor: pointer;
  background: transparent; color: var(--muted); border: 1px dashed var(--border);
  font: inherit;
}
.reset:hover { color: var(--text); border-color: var(--accent); }
.status { margin-top: 18px; font-size: 12px; color: var(--muted); }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }

/* Main */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
#chat { flex: 1; overflow-y: auto; padding: 24px 28px; }
.msg { max-width: 820px; margin: 0 auto 20px; }
.msg .role { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.bubble {
  padding: 12px 16px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--panel); overflow-x: auto;
}
.msg.user .bubble { background: var(--user); }
.tools { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.toolpill {
  font-size: 12px; padding: 3px 9px; border-radius: 999px;
  background: var(--tool); border: 1px solid var(--border); color: var(--tool-text);
}
.artifacts { max-width: 820px; margin: 8px auto 0; }

/* Imágenes del libro (mismo patrón que Khipu: hover → descargar / abrir visor) */
.imgwrap { position: relative; margin-top: 8px; }
.imgwrap img { display: block; max-width: 100%; border-radius: 8px; border: 1px solid var(--border); background: #fff; }
.imgcaption { font-size: 12.5px; color: var(--muted); margin: 6px 2px 0; font-style: italic; }
.imgtools {
  position: absolute; top: 8px; right: 8px;
  display: flex; gap: 6px;
  opacity: 0; transition: opacity .15s ease;
}
.imgwrap:hover .imgtools, .imgtools:focus-within { opacity: 1; }
.imgbtn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; padding: 0;
  font-size: 15px; line-height: 1; text-decoration: none; cursor: pointer;
  color: #e8e8e8; background: rgba(20, 24, 30, .82);
  border: 1px solid var(--border); border-radius: 7px;
  backdrop-filter: blur(2px);
}
.imgbtn:hover { background: rgba(40, 48, 60, .92); color: #fff; }
.imgbtn:disabled { opacity: .5; cursor: default; }

/* Fuentes RAG (desplegable, datos fieles del artifact de la tool) */
.toolout { margin-top: 8px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel); }
.toolout summary {
  padding: 6px 10px; font-size: 12.5px; color: var(--muted);
  cursor: pointer; user-select: none;
}
.toolout[open] summary { border-bottom: 1px solid var(--border); background: var(--panel-2); }
.tooloutbody { padding: 4px 12px 10px; overflow: auto; max-height: 480px; font-size: 13.5px; }
.srcitem { padding: 8px 0; border-bottom: 1px solid var(--border); }
.srcitem:last-child { border-bottom: none; }
.srcitem .srchead { font-weight: 600; font-size: 13px; }
.srcitem .srchead .cite { color: var(--accent); margin-right: 6px; }
.srcitem .srcchap { color: var(--muted); font-style: italic; }
.srcitem .srctext { color: var(--muted); font-size: 12.5px; margin-top: 4px; }

/* Markdown */
.bubble h1, .bubble h2, .bubble h3 { margin: 12px 0 6px; line-height: 1.3; }
.bubble h1 { font-size: 19px; } .bubble h2 { font-size: 17px; } .bubble h3 { font-size: 15px; }
.bubble p { margin: 8px 0; }
.bubble code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.bubble pre { background: var(--code-bg); padding: 12px; border-radius: 8px; overflow-x: auto; }
.bubble pre code { background: none; padding: 0; }
/* Bloque de código con botón de copiar */
.codeblock { position: relative; }
.codeblock .copybtn {
  position: absolute; top: 8px; right: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; padding: 0;
  font-size: 14px; line-height: 1; cursor: pointer;
  color: #cdd3dc; background: rgba(30, 36, 45, .9);
  border: 1px solid var(--border); border-radius: 6px;
  opacity: .55; transition: opacity .15s ease;
}
.codeblock:hover .copybtn { opacity: 1; }
.codeblock .copybtn:hover { color: #fff; border-color: var(--accent); }
.codeblock .copybtn.ok { color: #5fd08a; border-color: #5fd08a; opacity: 1; }
.bubble table { border-collapse: collapse; margin: 10px 0; font-size: 13px; }
.bubble th, .bubble td { border: 1px solid var(--border); padding: 5px 10px; text-align: left; }
.bubble th { background: var(--panel-2); }
.bubble a { color: var(--accent); }

/* Composer */
#composer {
  display: flex; gap: 10px; padding: 14px 28px; border-top: 1px solid var(--border);
  background: var(--panel);
}
#input {
  flex: 1; resize: none; padding: 11px 14px; border-radius: 10px; max-height: 180px;
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  font: inherit;
}
#send {
  padding: 0 20px; border-radius: 10px; cursor: pointer; font-weight: 600;
  background: var(--accent-2); color: white; border: none;
}
#send:disabled { opacity: 0.5; cursor: default; }
.cursor::after { content: "▋"; color: var(--accent); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }