/* Estilo inspirado en la consola de AWS: azul tinta #232F3E, naranja #FF9900, enlaces azules */
:root {
  --bg: #f2f3f3; --card: #ffffff; --ink: #16191f; --muted: #5f6b7a; --line: #d5dbdb;
  --accent: #ff9900; --accent-ink: #16191f; --accent-hover: #ec7211; --link: #0972d3;
  --opt: #fafafa; --opt-hover: #f2f8fd;
  --ok: #037f0c; --ok-bg: #f2fcf3; --bad: #d91515; --bad-bg: #fff7f7; --miss-bg: #fffce9; --miss: #8d6605;
  --nav: #232f3e; --nav2: #37475a; --nav-ink: #ffffff;
  --shadow: 0 1px 1px 0 rgba(0,28,36,.3), 1px 1px 1px 0 rgba(0,28,36,.15), -1px 1px 1px 0 rgba(0,28,36,.15);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1b2a; --card: #192534; --ink: #e9ebed; --muted: #9ba7b6; --line: #354150;
    --link: #539fe5; --opt: #1f2b3a; --opt-hover: #26364a;
    --ok: #29ad32; --ok-bg: #0f2a14; --bad: #ff7a7a; --bad-bg: #2f1316; --miss-bg: #2a2410; --miss: #f0c24b;
    --nav: #0f141a; --nav2: #232f3e;
    --shadow: 0 1px 1px 0 rgba(0,0,0,.6);
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 "Amazon Ember", "Helvetica Neue", Roboto, Arial, sans-serif; }
a { color: var(--link); }
.topwrap { position: sticky; top: 0; z-index: 5; background: var(--nav); box-shadow: 0 2px 6px rgba(0,0,0,.35); border-bottom: 3px solid var(--accent); }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 16px 6px; background: var(--nav); color: var(--nav-ink); }
.brand { background: none; border: 0; color: var(--nav-ink); font: inherit; font-weight: 700; font-size: 17px; cursor: pointer; padding: 0; text-align: left; }
.brand b { color: var(--accent); font-weight: 800; letter-spacing: .5px; }
.brand span { font-weight: 400; opacity: .75; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.top-right { font-variant-numeric: tabular-nums; font-size: 14px; opacity: .9; }
.optbtn { font: inherit; font-size: 14px; font-weight: 700; padding: 5px 14px; border-radius: 2px; border: 1px solid #879596; background: transparent; color: var(--nav-ink); cursor: pointer; white-space: nowrap; }
.optbtn:hover, .optbtn[aria-expanded="true"] { background: rgba(255,255,255,.12); border-color: var(--accent); }
main { max-width: 900px; margin: 0 auto; padding: 20px 16px 80px; }
h1 { font-size: 28px; font-weight: 700; margin: 8px 0 4px; }
h2 { font-size: 18px; font-weight: 700; margin: 0 0 12px; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 18px; box-shadow: var(--shadow); margin-bottom: 16px; }
.card > h2:first-child { padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
label.field { display: block; font-size: 13px; font-weight: 700; color: var(--muted); margin-bottom: 4px; }
select, input[type=number] { width: 100%; padding: 8px 10px; border-radius: 2px; border: 1px solid #879596; background: var(--card); color: var(--ink); font: inherit; }
select:focus, input:focus, textarea:focus { outline: 2px solid var(--link); outline-offset: 1px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--opt); cursor: pointer; font-size: 14px; user-select: none; }
.chip input { margin: 0; accent-color: var(--accent); }
button.btn { font: inherit; font-weight: 700; padding: 8px 20px; border-radius: 20px; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); cursor: pointer; }
button.btn:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
button.btn.secondary { background: transparent; color: var(--link); border-color: var(--link); }
button.btn.secondary:hover:not(:disabled) { background: var(--opt-hover); border-color: var(--link); }
button.btn:disabled { opacity: .45; cursor: not-allowed; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.spacer { flex: 1; }
.stats { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 8px; }
.stat b { display: block; font-size: 28px; font-weight: 700; }
.stat span { font-size: 13px; color: var(--muted); }

.progress { height: 6px; background: var(--line); border-radius: 999px; overflow: hidden; margin-bottom: 14px; }
.progress i { display: block; height: 100%; background: var(--accent); transition: width .2s; }
.qmeta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.tag { padding: 2px 9px; border-radius: 999px; background: var(--opt); border: 1px solid var(--line); font-size: 12px; }
.tag.hint { background: var(--miss-bg); color: var(--miss); border-color: transparent; font-weight: 600; }
.qtext { font-size: 18px; font-weight: 600; line-height: 1.5; margin: 0 0 16px; white-space: pre-line; }
.opts { display: grid; gap: 10px; }
.opt .otxt { white-space: pre-wrap; min-width: 0; overflow-wrap: anywhere; }
.opt { display: flex; gap: 12px; align-items: flex-start; text-align: left; width: 100%; padding: 12px 14px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--opt); color: var(--ink); font: inherit; cursor: pointer; }
.opt:hover:not(:disabled) { background: var(--opt-hover); }
.opt:disabled { cursor: default; }
.opt .k { flex: 0 0 auto; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-weight: 700; font-size: 14px; }
.opt.sel { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent); }
.opt.ok { border-color: var(--ok); background: var(--ok-bg); }
.opt.bad { border-color: var(--bad); background: var(--bad-bg); }
.opt.missed { border-color: var(--miss); background: var(--miss-bg); border-style: dashed; }
.opt .mark { margin-left: auto; font-weight: 700; padding-left: 8px; white-space: nowrap; }
.opt.ok .mark { color: var(--ok); } .opt.bad .mark { color: var(--bad); } .opt.missed .mark { color: var(--miss); }
.opt .ord { margin-left: auto; min-width: 28px; height: 28px; border-radius: 8px; background: var(--ok); color: #fff; display: grid; place-items: center; font-weight: 700; }
.match { display: grid; gap: 10px; margin-top: 14px; }
.match .prow { display: grid; grid-template-columns: 1fr 170px; gap: 12px; align-items: center; padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 10px; }
.match .prow.ok { border-color: var(--ok); background: var(--ok-bg); } .match .prow.bad { border-color: var(--bad); background: var(--bad-bg); }
.match .fix { grid-column: 1 / -1; font-size: 13px; color: var(--bad); }
@media (max-width: 560px) { .match .prow { grid-template-columns: 1fr; } }
.fb { margin-top: 16px; padding: 14px 16px; border-radius: 10px; border-left: 5px solid var(--accent); background: var(--opt); }
.fb.ok { border-left-color: var(--ok); } .fb.bad { border-left-color: var(--bad); }
.fb h3 { margin: 0 0 6px; font-size: 15px; }
.fb p { margin: 0; white-space: pre-line; }
details.shot { margin-top: 12px; }
details.shot summary { cursor: pointer; color: var(--link); font-weight: 600; }
details.shot img { width: 100%; border: 1px solid var(--line); border-radius: 8px; margin-top: 8px; }
.nav { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }

.score { font-size: 56px; font-weight: 800; line-height: 1; }
.score.pass { color: var(--ok); } .score.fail { color: var(--bad); }
.rlist { display: grid; gap: 8px; }
.ritem { border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
.ritem > summary { list-style: none; cursor: pointer; padding: 10px 14px; display: flex; gap: 10px; align-items: center; }
.ritem > summary::-webkit-details-marker { display: none; }
.ritem .res { font-weight: 800; width: 22px; }
.ritem.ok .res { color: var(--ok); } .ritem.bad .res { color: var(--bad); }
.ritem .body { padding: 4px 16px 16px; }
.empty { text-align: center; padding: 30px 10px; color: var(--muted); }

/* ---- memoria: confianza, ancla, hipercorreccion ---- */
.confrow { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line); }
.conf { font: inherit; padding: 7px 14px; border-radius: 999px; border: 1.5px solid var(--line); background: var(--opt); color: var(--ink); cursor: pointer; }
.conf:hover { background: var(--opt-hover); }
.conf.on { border-color: var(--accent); background: var(--accent); color: var(--accent-ink); font-weight: 700; }
.anchor { margin-top: 16px; padding: 14px 16px; border-radius: 10px; border: 2px solid var(--bad); background: var(--bad-bg); }
.anchor h3 { margin: 10px 0 4px; font-size: 15px; }
.anchor .gold { margin: 0; font-weight: 700; font-size: 17px; }
.anchor textarea { width: 100%; padding: 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font: inherit; resize: vertical; }
.hyper { font-weight: 600; padding: 8px 10px; border-radius: 8px; background: var(--miss-bg); color: var(--miss); }
.hyper.soft { margin-top: 14px; }
.mynote { margin-top: 12px; padding: 10px 14px; border-radius: 10px; border-left: 5px solid var(--miss); background: var(--miss-bg); }
.tag.scar { background: var(--bad-bg); color: var(--bad); border-color: transparent; font-weight: 600; }
.card.recall { border: 2px dashed var(--accent); }

/* ---- banco de preguntas incorrectas ---- */
.bitem { display: flex; gap: 10px; align-items: center; padding: 10px 14px; }
.bitem .bmain { flex: 1; min-width: 0; font-size: 14px; overflow-wrap: anywhere; }
.bitem .btn { padding: 6px 14px; flex: 0 0 auto; }
.hyper.ok { background: var(--ok-bg); color: var(--ok); }
@media (max-width: 560px) { .bitem { flex-wrap: wrap; } .bitem .bmain { flex-basis: 100%; } }

/* ---- menú de navegación y sesiones ---- */
.mainnav { display: flex; gap: 2px; padding: 0 12px; overflow-x: auto; scrollbar-width: none; background: var(--nav2); }
.mainnav::-webkit-scrollbar { display: none; }
.nbtn { flex: 0 0 auto; font: inherit; font-size: 14px; font-weight: 700; padding: 9px 14px 7px; border: 0; border-bottom: 3px solid transparent; background: transparent; color: #d5dbdb; cursor: pointer; white-space: nowrap; }
.nbtn:hover:not(:disabled) { color: #fff; background: rgba(255,255,255,.08); }
.nbtn.on { color: #fff; border-bottom-color: var(--accent); }
.nbtn.flag:not(.on) { color: #ffb3b3; }
.nbtn:disabled { opacity: .4; cursor: not-allowed; }
.card.resume { border: 2px solid var(--accent); }
.card.pausecard { text-align: center; padding: 34px 18px; }
.card.pausecard .row { justify-content: center; margin-top: 14px; }

/* ---- panel de opciones (descarga del APK) ---- */
.optpanel { position: fixed; top: 56px; right: 12px; z-index: 20; width: min(360px, calc(100vw - 24px)); background: var(--card); color: var(--ink);
  border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: 4px; box-shadow: 0 4px 16px rgba(0,0,0,.35); padding: 16px; }
.optpanel h2 { margin: 0 0 10px; font-size: 16px; padding: 0; border: 0; }
.optpanel .apkline { display: flex; gap: 12px; align-items: center; }
.optpanel .apkicon { font-size: 30px; }
.optpanel .apkname { font-weight: 700; }
.optpanel a.btn { display: inline-block; text-decoration: none; font-weight: 700; padding: 8px 20px; border-radius: 20px; background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent); }
.optpanel a.btn:hover { background: var(--accent-hover); }
.optpanel ol { margin: 10px 0 0; padding-left: 20px; font-size: 13px; color: var(--muted); }
.optpanel .optclose { float: right; background: none; border: 0; font-size: 20px; line-height: 1; cursor: pointer; color: var(--muted); }
.tipcard { border-left: 4px solid var(--accent); }

/* ---- móvil ---- */
.tipcard a { overflow-wrap: anywhere; }
@media (max-width: 560px) {
  .top { padding-inline: 12px; }
  .brand span { display: none; }
  .top-actions { gap: 8px; }
  .optbtn { padding: 5px 10px; }
  .optpanel { top: 52px; right: 8px; }
  h1 { font-size: 24px; }
}

/* ---- exam selection ---- */
.examgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin: 18px 0; }
.examcard { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; text-align: left; text-decoration: none; color: var(--ink); font: inherit;
  background: var(--card); border: 1px solid var(--line); border-top: 4px solid var(--accent); border-radius: 8px; padding: 18px; box-shadow: var(--shadow); cursor: pointer; }
.examcard:hover { border-color: var(--accent); }
.examcard.current { outline: 2px solid var(--accent); }
.examcard.soon { border-top-color: var(--line); border-style: dashed; cursor: default; opacity: .75; }
.examcard.soon:hover { border-color: var(--line); }
.exbadge { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; padding: 2px 10px; border-radius: 999px; background: var(--ok-bg); color: var(--ok); }
.examcard.soon .exbadge { background: var(--opt); color: var(--muted); }
.exname { font-size: 19px; line-height: 1.25; }
.excode { font-weight: 800; color: var(--accent-hover); letter-spacing: .04em; }
.exfacts { font-size: 13px; color: var(--muted); }
.exgo { margin-top: 6px; font-weight: 700; color: var(--link); }
.examline { margin: 4px 0 10px; font-size: 14px; color: var(--muted); }
.examline b { color: var(--ink); }
button.linkbtn { background: none; border: 0; padding: 0; font: inherit; color: var(--link); text-decoration: underline; cursor: pointer; }