:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel2: #273449;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #fbbf24;
  --accent2: #f59e0b;
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
  --radius: 10px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
a { color: var(--accent); cursor: pointer; text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline-offset: 0; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px; background: var(--panel); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-size: 20px; font-weight: 700; cursor: pointer; color: var(--accent); }
.brand:hover { text-decoration: none; }
.brand span { font-size: 12px; font-weight: 400; color: var(--muted); margin-left: 6px; }
.topbar nav a {
  margin-left: 20px; color: var(--text); padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}
.topbar nav a:hover { text-decoration: none; }
.topbar nav a.active { color: var(--accent); border-bottom-color: var(--accent); }

@media (max-width: 640px) {
  .brand span { display: none; }
  .topbar { padding: 12px var(--space-3); }
  .topbar nav a { margin-left: var(--space-3); font-size: 13px; }
}

main { max-width: 1100px; margin: 0 auto; padding: 28px 24px 80px; }
.loading { color: var(--muted); padding: 40px; text-align: center; }

h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 24px 0 12px; }
.sub { color: var(--muted); margin: 0 0 20px; }

.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }

button, .btn {
  background: var(--accent); color: #1a1a1a; border: 0; padding: 9px 16px;
  border-radius: 8px; font-weight: 600; cursor: pointer; font-size: 14px;
  display: inline-block; text-decoration: none;
}
button:hover, .btn:hover { background: var(--accent2); text-decoration: none; }
button.ghost, .btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
button.ghost:hover, .btn.ghost:hover { background: var(--panel2); }
button.danger, .btn.danger { background: transparent; color: var(--red); border: 1px solid var(--red); }
button.sm, .btn.sm { padding: 5px 10px; font-size: 13px; }

input, select, textarea {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 9px 12px; font: inherit;
}
input:focus, select:focus, textarea:focus { outline: 1px solid var(--accent); }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.field { margin-bottom: 14px; }

.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; margin-bottom: 14px;
}
.card.clickable {
  cursor: pointer; transition: border-color .15s;
  display: block; color: var(--text); text-decoration: none;
}
.card.clickable:hover { border-color: var(--accent); text-decoration: none; }

.grid { display: grid; gap: 14px; }
.grid.cols2 { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.grid.cols-cat { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }

.badge { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--panel2); color: var(--muted); }
.badge.green { background: rgba(34,197,94,.18); color: var(--green); }
.badge.yellow { background: rgba(234,179,8,.18); color: var(--yellow); }
.badge.red { background: rgba(239,68,68,.18); color: var(--red); }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.big-num { font-size: 32px; font-weight: 700; }

/* progress bar */
.bar { background: var(--panel2); border-radius: 6px; height: 22px; overflow: hidden; position: relative; }
.bar > span { display: block; height: 100%; background: var(--accent); transition: width .3s; }
.bar.green > span { background: var(--green); }
.bar.yellow > span { background: var(--yellow); }
.bar.red > span { background: var(--red); }
.bar-label { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600; color: #0f172a; }

/* question / assessment editor */
.cat-nav { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.cat-nav button { background: var(--panel2); color: var(--text); font-weight: 500; }
.cat-nav button.active { background: var(--accent); color: #1a1a1a; }
.cat-nav button .gp { font-size: 11px; opacity: .8; margin-left: 4px; }

/* sidebar de categorías/subsecciones (desktop) */
.edit-layout { display: grid; grid-template-columns: 260px 1fr; gap: 20px; align-items: start; }
.edit-nav {
  position: sticky; top: 70px; max-height: calc(100vh - 90px); overflow-y: auto;
  z-index: 5; padding-right: 4px;
}
.edit-nav .nav-cat { margin-bottom: 4px; }
.edit-nav .nav-cat-btn {
  display: flex; align-items: center; gap: 8px; width: 100%; text-align: left;
  background: var(--panel); color: var(--text); font-weight: 500; padding: 9px 10px;
  border: 1px solid var(--border); border-radius: 8px;
}
.edit-nav .nav-cat-btn:hover { border-color: var(--accent); }
.edit-nav .nav-cat.active .nav-cat-btn { background: var(--panel2); border-color: var(--accent); color: var(--accent); }
.edit-nav .nav-cat-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.edit-nav .nav-cat-count { font-size: 12px; color: var(--muted); flex: 0 0 auto; }
.edit-nav .nav-cat.done .nav-cat-count { color: var(--green); }
.edit-nav .nav-cat.active .nav-cat-count { color: inherit; }
.edit-nav .nav-subs { display: none; flex-direction: column; gap: 2px; margin: 4px 0 8px 8px; }
.edit-nav .nav-cat.active .nav-subs { display: flex; }
.edit-nav .nav-sub-btn {
  display: block; width: 100%; text-align: left; background: transparent; color: var(--muted);
  font-weight: 400; font-size: 12px; padding: 5px 8px; border: 0; border-radius: 6px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.edit-nav .nav-sub-btn:hover { background: var(--panel2); color: var(--text); }

.edit-toolbar { display: flex; justify-content: flex-end; margin-bottom: 10px; }
.edit-pager { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; }

.question.answered.hide-answered { display: none; }
.subsection-card.all-hidden { display: none; }

@media (max-width: 900px) {
  .edit-layout { display: block; }
  .edit-nav { display: none; }
  .cat-nav { display: flex; }
}
@media (min-width: 901px) {
  .cat-nav { display: none; }
}

.question { border-bottom: 1px solid var(--border); padding: 16px 0; }
.question:last-child { border-bottom: 0; }
.q-code { color: var(--accent); font-weight: 600; font-size: 13px; }
.q-statement { margin: 4px 0 10px; }
.likert { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.likert .opt {
  border: 1px solid var(--border); border-radius: 8px; padding: 8px; cursor: pointer;
  font-size: 12px; text-align: center; background: var(--bg); transition: all .12s;
}
.likert .opt:hover { border-color: var(--accent); }
.likert .opt.sel { background: var(--accent); color: #1a1a1a; border-color: var(--accent); font-weight: 600; }
.likert .opt .lvl { display: block; font-weight: 700; font-size: 14px; margin-bottom: 2px; }
.q-comment { margin-top: 8px; width: 100%; min-height: 0; height: 36px; resize: vertical; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(100px);
  background: var(--green); color: #052e16; padding: 10px 18px; border-radius: 8px;
  font-weight: 600; transition: transform .3s; z-index: 50;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--red); color: #450a0a; }

.breadcrumb { color: var(--muted); font-size: 13px; margin-bottom: 12px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb > *:not(:last-child)::after { content: '›'; margin: 0 6px; color: var(--border); }
.flex-fill { flex: 1; }

/* pestañas del hub de evaluación */
.view-tabs {
  display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin: 18px 0 20px;
  overflow-x: auto;
}
.view-tabs a {
  padding: 10px 16px; color: var(--muted); font-weight: 500; font-size: 14px;
  border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap; flex: 0 0 auto;
}
.view-tabs a:hover { text-decoration: none; color: var(--text); }
.view-tabs a.active { color: var(--text); border-bottom-color: var(--accent); }

/* gráficos */
.chart-box { position: relative; width: 100%; height: 260px; }
.chart-box.chart-lg { height: 420px; max-width: 640px; margin: 0 auto; }
.reco { margin-top: 10px; }
.reco-row { display: flex; align-items: center; gap: 10px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.reco-row:last-child { border-bottom: 0; }
.dot { width: 10px; height: 10px; border-radius: 50%; flex: 0 0 auto; }
details summary { cursor: pointer; padding: 6px 0; }

/* chat / assessment IA */
.chat-layout { display: grid; grid-template-columns: 1fr 280px; gap: 14px; align-items: start; }
@media (max-width: 760px) { .chat-layout { grid-template-columns: 1fr; } }
.chat-main { display: flex; flex-direction: column; height: 70vh; padding: 0; }
.chat-thread { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.bubble { max-width: 80%; padding: 10px 14px; border-radius: 14px; line-height: 1.45; white-space: normal; }
.bubble.user { align-self: flex-end; background: var(--accent); color: #1a1a1a; border-bottom-right-radius: 4px; }
.bubble.assistant { align-self: flex-start; background: var(--panel2); color: var(--text); border-bottom-left-radius: 4px; }
.bubble.typing { color: var(--muted); letter-spacing: 2px; animation: pulse 1.2s infinite; }
@keyframes pulse { 0%,100% { opacity: .4; } 50% { opacity: 1; } }
.chat-input { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border); }
.chat-input textarea { flex: 1; resize: none; }
.chat-side { max-height: 70vh; overflow: hidden; display: flex; flex-direction: column; }
.chat-side #scores { overflow-y: auto; }
.score-row { display: flex; align-items: center; gap: 8px; padding: 3px 0; }
.score-row .badge { min-width: 22px; text-align: center; }
.checkbox-row { display: flex; align-items: center; gap: 8px; padding: 6px 0; }
.checkbox-row input { width: auto; }

/* skeleton de carga */
.skeleton-block { display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-4) 0; }
.skeleton {
  height: 64px; border-radius: var(--radius); background: linear-gradient(
    100deg, var(--panel) 30%, var(--panel2) 50%, var(--panel) 70%
  );
  background-size: 200% 100%; animation: shimmer 1.4s ease-in-out infinite;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* estado vacío con CTA */
.empty-state {
  text-align: center; padding: var(--space-4) var(--space-3) calc(var(--space-4) * 1.5);
}
.empty-state .empty-icon { font-size: 40px; margin-bottom: var(--space-2); }
.empty-state h3 { margin: 0 0 var(--space-1); font-size: 17px; }
.empty-state p { color: var(--muted); margin: 0 0 var(--space-3); }

/* diálogo de confirmación propio */
dialog.confirm-dialog {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--radius); padding: var(--space-4); max-width: 360px; width: calc(100% - 32px);
}
dialog.confirm-dialog::backdrop { background: rgba(15, 23, 42, .6); }
dialog.confirm-dialog p { margin: 0 0 var(--space-4); }
dialog.confirm-dialog .row { justify-content: flex-end; }

/* asegurar sin overflow horizontal en viewports angostos */
@media (max-width: 480px) {
  main { padding: var(--space-3) var(--space-2) 60px; }
  .likert { grid-template-columns: repeat(auto-fit, minmax(60px, 1fr)); }
}