/* Tema Telegram: usa las variables nativas y cae a un tema claro/oscuro propio */
:root {
  --tg-bg: var(--tg-theme-bg-color, #ffffff);
  --tg-text: var(--tg-theme-text-color, #222222);
  --tg-hint: var(--tg-theme-hint-color, #999999);
  --tg-link: var(--tg-theme-link-color, #2481cc);
  --tg-btn: var(--tg-theme-button-color, #2481cc);
  --tg-btn-text: var(--tg-theme-button-text-color, #ffffff);
  --tg-secondary: var(--tg-theme-secondary-bg-color, #f1f1f1);
  --tg-section: var(--tg-theme-section-bg-color, #ffffff);
  --tg-header: var(--tg-theme-header-bg-color, #ffffff);
  --tg-destructive: var(--tg-theme-destructive-text-color, #d14a4a);
  --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--tg-bg);
  color: var(--tg-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  display: flex;
  flex-direction: column;
  max-width: 720px;
  margin: 0 auto;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* ── Barra simulador ─────────────────────────────────────── */
#simbar {
  display: flex; gap: 8px; align-items: center;
  padding: 6px 10px; font-size: 12px;
  background: var(--tg-secondary); border-bottom: 1px solid rgba(0,0,0,.08);
}
#simbar label { color: var(--tg-hint); }
#simbar select, #simbar button {
  font: inherit; padding: 4px 8px; border-radius: 8px;
  border: 1px solid rgba(0,0,0,.15); background: var(--tg-section); color: var(--tg-text);
}

/* ── Cabecera ────────────────────────────────────────────── */
#app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; background: var(--tg-header);
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo { font-size: 26px; }
.brand h1 { font-size: 17px; font-weight: 600; }
.brand p { font-size: 12px; color: var(--tg-hint); }
.badge {
  font-size: 11px; padding: 3px 8px; border-radius: 20px;
  background: var(--tg-secondary); color: var(--tg-hint); white-space: nowrap;
}
.badge.ok { background: #e7f6ec; color: #2e9e5b; }
.badge.err { background: #fdeaea; color: var(--tg-destructive); }

/* ── Selector de agentes ─────────────────────────────────── */
/* Flex-wrap: todos los botones visibles siempre (sin scroll oculto) */
#preset-bar {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 8px 14px;
}
.preset-chip {
  flex: 1 1 auto; min-width: 0; display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 10px; border-radius: 20px; border: 1px solid rgba(0,0,0,.1);
  background: var(--tg-secondary); color: var(--tg-text);
  font-size: 13px; cursor: pointer; user-select: none; transition: transform .05s;
  white-space: nowrap;
}
.preset-chip:active { transform: scale(.96); }
.preset-chip.active {
  background: var(--tg-btn); color: var(--tg-btn-text); border-color: transparent;
}
.preset-chip .desc { font-size: 11px; opacity: .75; }

/* ── Chat ────────────────────────────────────────────────── */
#chat {
  flex: 1; overflow-y: auto; padding: 12px 14px;
  display: flex; flex-direction: column; gap: 8px;
}
.empty {
  margin: auto; text-align: center; color: var(--tg-hint); font-size: 13px; line-height: 1.6;
}
.empty-icon { font-size: 40px; margin-bottom: 8px; }

.msg {
  max-width: 85%; padding: 9px 12px; border-radius: var(--radius);
  font-size: 14px; line-height: 1.45; white-space: pre-wrap; word-wrap: break-word;
  box-shadow: 0 1px 2px rgba(0,0,0,.06);
}
.msg.user {
  align-self: flex-end;
  background: var(--tg-btn); color: var(--tg-btn-text);
  border-bottom-right-radius: 4px;
}
.msg.assistant {
  align-self: flex-start;
  background: var(--tg-secondary);
  border-bottom-left-radius: 4px;
}
.msg .meta { display: block; font-size: 10px; opacity: .6; margin-top: 4px; }
.msg.error { border: 1px solid var(--tg-destructive); color: var(--tg-destructive); }

/* ── Indicador de escritura ──────────────────────────────── */
.typing {
  display: flex; align-items: center; gap: 6px;
  padding: 0 18px 4px; font-size: 12px; color: var(--tg-hint);
}
.typing .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--tg-hint); animation: blink 1.2s infinite;
}
.typing .dot:nth-child(2) { animation-delay: .2s; }
.typing .dot:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

/* ── Compositor ──────────────────────────────────────────── */
#composer {
  display: flex; gap: 8px; align-items: flex-end;
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
  background: var(--tg-bg); border-top: 1px solid rgba(0,0,0,.06);
}
#input {
  flex: 1; resize: none; font: inherit; font-size: 14px; line-height: 1.4;
  max-height: 120px; padding: 10px 12px; border-radius: 18px;
  border: 1px solid rgba(0,0,0,.12); outline: none;
  background: var(--tg-secondary); color: var(--tg-text);
}
#input:focus { border-color: var(--tg-link); }
#send {
  width: 42px; height: 42px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--tg-btn); color: var(--tg-btn-text); font-size: 17px;
  display: flex; align-items: center; justify-content: center;
}
#send:disabled { opacity: .5; cursor: default; }

/* ── Botones de compositor (adjuntar / documentos) ────────── */
#attach, #files-toggle {
  width: 40px; height: 40px; flex: 0 0 auto; border-radius: 50%; border: none; cursor: pointer;
  background: var(--tg-secondary); color: var(--tg-text); font-size: 17px;
  display: flex; align-items: center; justify-content: center;
}
#attach:active, #files-toggle:active { transform: scale(.94); }

/* ── Panel de documentos ──────────────────────────────────── */
#files-panel {
  border-top: 1px solid rgba(0,0,0,.08);
  background: var(--tg-bg);
  max-height: 40vh; overflow-y: auto;
}
.files-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px; font-size: 13px; font-weight: 600; color: var(--tg-hint);
  position: sticky; top: 0; background: var(--tg-bg);
}
#files-close {
  border: none; background: none; color: var(--tg-hint); font-size: 15px; cursor: pointer;
}
#files-list { list-style: none; padding: 0 10px 10px; display: flex; flex-direction: column; gap: 6px; }
.file-empty { color: var(--tg-hint); font-size: 12px; padding: 6px 4px; }
.file-item {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--tg-secondary); border-radius: 10px; padding: 8px 10px;
}
.file-info { display: flex; flex-direction: column; min-width: 0; }
.file-name { font-size: 13px; font-weight: 500; word-break: break-all; }
.file-meta { font-size: 11px; color: var(--tg-hint); }
.file-actions { display: flex; gap: 6px; flex: 0 0 auto; }
.file-actions button {
  border: none; cursor: pointer; border-radius: 8px; width: 34px; height: 34px;
  background: var(--tg-btn); color: var(--tg-btn-text); font-size: 14px;
}
.file-actions button:active { transform: scale(.94); }
.file-actions .file-del { background: var(--tg-destructive, #d14a4a); }

/* ── Barra de cuaderno ────────────────────────────────────── */
#project-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 14px; background: var(--tg-section);
  border-bottom: 1px solid rgba(0,0,0,.06);
}
#project-bar label { font-size: 12px; color: var(--tg-hint); font-weight: 600; }
#project-select {
  flex: 1; font: inherit; font-size: 13px; padding: 6px 8px; border-radius: 8px;
  border: 1px solid rgba(0,0,0,.12); background: var(--tg-secondary); color: var(--tg-text);
}
#project-new {
  width: 34px; height: 34px; border-radius: 8px; border: none; cursor: pointer;
  background: var(--tg-btn); color: var(--tg-btn-text); font-size: 17px;
}

/* ── Selección de documentos ──────────────────────────────── */
.file-item { display: flex; align-items: center; gap: 8px; }
.file-check { width: 18px; height: 18px; flex: 0 0 auto; accent-color: var(--tg-btn); }
.file-section {
  font-size: 12px; font-weight: 600; color: var(--tg-hint);
  padding: 8px 4px 2px; list-style: none;
}
.files-tools { display: flex; gap: 6px; }
#files-reindex {
  border: none; background: none; color: var(--tg-hint); font-size: 15px; cursor: pointer;
}
.files-hint {
  font-size: 11px; color: var(--tg-link); padding: 2px 14px 4px;
}
.files-search {
  display: flex; gap: 6px; padding: 4px 14px 8px;
}
.files-search input {
  flex: 1; font: inherit; font-size: 13px; padding: 7px 10px; border-radius: 8px;
  border: 1px solid rgba(0,0,0,.12); background: var(--tg-secondary); color: var(--tg-text);
}
.files-search button {
  border: none; border-radius: 8px; padding: 0 12px; cursor: pointer;
  background: var(--tg-btn); color: var(--tg-btn-text); font-size: 13px;
}
#rag-results { list-style: none; padding: 0 10px 8px; display: flex; flex-direction: column; gap: 6px; }
.rag-hit .file-name { color: var(--tg-link); }

/* ── Modal y toast ─────────────────────────────────────────── */
.modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.modal-box {
  background: var(--tg-section, var(--tg-bg)); color: var(--tg-text);
  border-radius: 14px; padding: 18px; width: 100%; max-width: 320px;
  display: flex; flex-direction: column; gap: 12px;
}
.modal-box p { font-size: 14px; font-weight: 600; }
.modal-desc { font-size: 12px !important; font-weight: 400 !important; color: var(--tg-hint); line-height: 1.4; }
#modal-input {
  font: inherit; font-size: 14px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid rgba(0,0,0,.15); outline: none;
  background: var(--tg-secondary); color: var(--tg-text);
}
.modal-btns { display: flex; gap: 8px; justify-content: flex-end; }
.modal-btns button {
  border: none; border-radius: 10px; padding: 9px 16px; cursor: pointer; font: inherit; font-size: 13px;
  background: var(--tg-secondary); color: var(--tg-text);
}
.modal-btns button.primary { background: var(--tg-btn); color: var(--tg-btn-text); }
#toast {
  position: fixed; left: 50%; bottom: calc(70px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  background: var(--tg-btn); color: var(--tg-btn-text);
  padding: 9px 16px; border-radius: 20px; font-size: 13px; z-index: 60;
  max-width: 86%; text-align: center; box-shadow: 0 2px 8px rgba(0,0,0,.25);
}

/* El atributo HTML [hidden] debe ganar siempre sobre display:flex de las clases */
[hidden] { display: none !important; }

/* ── Botones de la barra de cuaderno ───────────────────────── */
#project-bar button { flex: 0 0 auto; }
#chat-delete, #chat-reset {
  width: 34px; height: 34px; border-radius: 8px; border: none; cursor: pointer;
  background: var(--tg-secondary); color: var(--tg-text); font-size: 15px;
}
#chat-delete.active { background: var(--tg-destructive, #d14a4a); color: #fff; }

/* ── Selección de mensajes ─────────────────────────────────── */
.msg.selectable { position: relative; padding-left: 30px; }
.msg-check {
  position: absolute; left: 8px; top: 10px;
  width: 17px; height: 17px; accent-color: var(--tg-btn);
}
#selbar {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px calc(8px + env(safe-area-inset-bottom));
  background: var(--tg-section, var(--tg-bg)); border-top: 1px solid rgba(0,0,0,.1);
  position: sticky; bottom: 0;
}
#sel-count { flex: 1; font-size: 13px; color: var(--tg-hint); }
#selbar button {
  border: none; border-radius: 10px; padding: 8px 14px; cursor: pointer; font: inherit; font-size: 13px;
  background: var(--tg-secondary); color: var(--tg-text);
}
#selbar .primary { background: var(--tg-destructive, #d14a4a); color: #fff; }
#selbar .primary:disabled { opacity: .4; }

/* ── Botón pantalla completa ───────────────────────────────── */
.header-tools { display: flex; align-items: center; gap: 8px; }
#fullscreen-btn {
  border: none; cursor: pointer; border-radius: 8px; width: 34px; height: 34px;
  background: var(--tg-secondary); color: var(--tg-text); font-size: 16px;
}
#fullscreen-btn:active { transform: scale(.94); }

/* ── Archivos restringidos (solo Turnitin) ─────────────────── */
.file-actions .file-lock { background: var(--tg-secondary); color: var(--tg-hint); }
.file-actions .file-lock.on { background: var(--tg-destructive, #d14a4a); color: #fff; }
.file-name.locked::after { content: " 🔒"; }

/* ── Panel de colaboradores ────────────────────────────────── */
#collab-panel {
  border-top: 1px solid rgba(0,0,0,.08);
  background: var(--tg-bg);
  max-height: 45vh; overflow-y: auto;
}
#collab-invite, #collab-add {
  flex: 1; border: none; border-radius: 8px; padding: 9px 10px; cursor: pointer;
  background: var(--tg-btn); color: var(--tg-btn-text); font-size: 12px; white-space: nowrap;
}
#collab-invite-box { padding: 4px 14px 10px; display: flex; flex-direction: column; gap: 6px; }
#collab-invite-box code {
  font-size: 11px; word-break: break-all; background: var(--tg-secondary);
  padding: 8px 10px; border-radius: 8px; color: var(--tg-text);
}
.collab-link { font-size: 12px; font-weight: 600; color: var(--tg-hint); }
.collab-hint { font-size: 11px; color: var(--tg-hint); }