:root {
  --bg: #f6f5f1; --panel: #fff; --fg: #1d1d1b; --muted: #6b6b66; --line: #e2e0d8;
  --accent: #1f3a5f; --accent-2: #c8553d; --ok: #2e7d4f; --bad: #b3261e; --warn: #a66300;
  --ok-bg: #e6f3eb; --bad-bg: #fbe9e7; --warn-bg: #fff4e0; --sel: #e8eef6;
  --radius: 10px; --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161614; --panel: #201f1d; --fg: #ecebe6; --muted: #a3a29b; --line: #34332f;
    --accent: #8fb2e0; --accent-2: #e88a72; --ok: #6cc28f; --bad: #f08a80; --warn: #e8b05c;
    --ok-bg: #1d3326; --bad-bg: #3a1f1c; --warn-bg: #3a2c14; --sel: #22324a;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 var(--font); }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.05rem; }
.muted { color: var(--muted); } .center { text-align: center; } .small { font-size: .875rem; }
main { max-width: 1000px; margin: 0 auto; padding: 1rem 16px 4rem; }

.top { position: sticky; top: 0; z-index: 10; background: var(--panel); border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 1rem; padding: .5rem 16px; }
.brand { font-weight: 700; text-decoration: none; color: var(--accent); white-space: nowrap; }
nav { display: flex; gap: .25rem; overflow-x: auto; scrollbar-width: none; }
nav a { text-decoration: none; color: var(--fg); padding: .35rem .6rem; border-radius: 6px; white-space: nowrap; font-size: .95rem; }
nav a.active { background: var(--sel); color: var(--accent); font-weight: 600; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; margin-bottom: 1rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }
.kpi .v { font-size: 1.9rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.kpi .l { color: var(--muted); font-size: .85rem; }
.row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.spacer { flex: 1; }

button, .btn { font: inherit; border: 1px solid var(--line); background: var(--panel); color: var(--fg); border-radius: 8px; padding: .5rem .9rem; cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
@media (prefers-color-scheme: dark) { button.primary, .btn.primary { color: #10131a; } }
button:disabled { opacity: .5; cursor: default; }
button.small { padding: .25rem .6rem; font-size: .85rem; }
input, select, textarea { font: inherit; color: var(--fg); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: .5rem .6rem; width: 100%; }
label { display: block; font-size: .9rem; color: var(--muted); margin: .6rem 0 .2rem; }
label.inline { display: inline-flex; gap: .35rem; align-items: center; color: var(--fg); margin: 0 .8rem .3rem 0; }
label.inline input { width: auto; }
.error { color: var(--bad); }

.login { max-width: 380px; margin: 12vh auto; }

.temas-sel { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr)); gap: .15rem .8rem; max-height: 22rem; overflow: auto; border: 1px solid var(--line); border-radius: 8px; padding: .5rem; }
.temas-sel label { margin: 0; color: var(--fg); display: flex; gap: .4rem; align-items: flex-start; font-size: .88rem; }
.temas-sel input { width: auto; margin-top: .25rem; }

/* test */
.testbar { position: sticky; top: 49px; z-index: 5; background: var(--bg); padding: .5rem 0; display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: 1rem; }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; }
.timer.low { color: var(--bad); }
.progress { flex: 1; min-width: 120px; height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--accent); }
.q { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; margin-bottom: .9rem; }
.q .meta { font-size: .78rem; color: var(--muted); margin-bottom: .35rem; display: flex; gap: .5rem; flex-wrap: wrap; }
.q .enun { font-weight: 600; margin-bottom: .6rem; }
.opt { display: flex; gap: .6rem; width: 100%; text-align: left; padding: .55rem .7rem; margin: .3rem 0; border: 1px solid var(--line); border-radius: 8px; background: transparent; }
.opt .letra { font-weight: 700; color: var(--muted); min-width: 1.2rem; }
.opt.sel { background: var(--sel); border-color: var(--accent); }
.opt.correcta { background: var(--ok-bg); border-color: var(--ok); }
.opt.incorrecta { background: var(--bad-bg); border-color: var(--bad); }
.conf { display: flex; gap: .4rem; margin-top: .4rem; align-items: center; font-size: .85rem; color: var(--muted); }
.conf button { padding: .15rem .55rem; font-size: .8rem; }
.conf button.on { background: var(--sel); border-color: var(--accent); color: var(--accent); }
.expl { margin-top: .6rem; padding: .6rem .75rem; border-left: 3px solid var(--accent); background: var(--sel); border-radius: 0 8px 8px 0; font-size: .92rem; }
.tag { display: inline-block; font-size: .72rem; padding: .05rem .45rem; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }
.tag.ok { color: var(--ok); border-color: var(--ok); } .tag.bad { color: var(--bad); border-color: var(--bad); } .tag.warn { color: var(--warn); border-color: var(--warn); }
.mapa { display: flex; flex-wrap: wrap; gap: 4px; }
.mapa a { width: 2rem; height: 2rem; display: grid; place-items: center; border-radius: 6px; border: 1px solid var(--line); text-decoration: none; color: var(--fg); font-size: .78rem; }
.mapa a.r { background: var(--sel); border-color: var(--accent); }
.mapa a.ok { background: var(--ok-bg); border-color: var(--ok); }
.mapa a.bad { background: var(--bad-bg); border-color: var(--bad); }

/* resultados */
.nota { font-size: 2.6rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.pass { color: var(--ok); } .fail { color: var(--bad); }
table { width: 100%; border-collapse: collapse; font-size: .9rem; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: .4rem .45rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--panel); }
.tablewrap { overflow: auto; max-height: 34rem; }
.bar { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; min-width: 60px; }
.bar > i { display: block; height: 100%; }
svg text { fill: var(--muted); font-size: 11px; }

textarea.practico { min-height: 55vh; line-height: 1.6; }
.rubrica td:first-child { width: 55%; }
@media (max-width: 640px) {
  h1 { font-size: 1.35rem; }
  .hide-sm { display: none; }
  .testbar { top: 45px; }
}