/* Examen Cabo · estilos */
:root {
  --paper: #eff2ec;
  --card: #ffffff;
  --ink: #14261b;
  --muted: #55665a;
  --line: #d3dacd;
  --green: #1b4a2d;
  --green-ink: #f4f7f1;
  --brass: #a87f1c;
  --brass-soft: #f1e7c8;
  --ok: #1d7a42;
  --ok-soft: #dff1e5;
  --bad: #b3261e;
  --bad-soft: #f8e1de;
  --focus: #1b6fd1;
  --kw: #ecd48a;
  --radius: 6px;
  --f-head: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --f-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --f-ui: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
}
:root:not([data-theme="light"]) { }
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e1912; --card: #15251a; --ink: #e7eee3; --muted: #9db0a1; --line: #2a3d2f;
    --green: #2f7a4a; --green-ink: #f4f7f1; --brass: #d6b25a; --brass-soft: #2e2810;
    --ok: #55c07f; --ok-soft: #12301d; --bad: #ff8a80; --bad-soft: #3a1815; --focus: #7db4ff; --kw: #6a5818;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 1.0625rem/1.6 var(--f-body);
}
h1, h2, h3, h4 { font-family: var(--f-head); line-height: 1.12; margin: 0 0 .5em; font-stretch: 112%; letter-spacing: -.01em; }
h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); font-weight: 850; }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 750; }
p { margin: 0 0 1em; }
a { color: var(--green); }
@media (prefers-color-scheme: dark) { a { color: #8fd3a8; } }
code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .9em; background: var(--brass-soft); padding: .05em .35em; border-radius: 3px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 3px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .5rem 1rem; z-index: 99; }
.skip:focus { left: 8px; top: 8px; }
.empty { padding: 3rem 16px; text-align: center; color: var(--muted); }

/* cabecera */
.top { background: var(--green); color: var(--green-ink); display: flex; align-items: center; justify-content: space-between; padding: .7rem max(16px, calc((100vw - 1080px) / 2)); font-family: var(--f-ui); }
.brand { display: flex; align-items: center; gap: .6rem; color: inherit; text-decoration: none; }
.brand__mark { width: 28px; height: 28px; fill: #d6b25a; }
.brand__name { font: 800 1.15rem/1 var(--f-head); font-stretch: 118%; letter-spacing: .01em; }
.top__user { font-size: .85rem; opacity: .9; display: flex; align-items: center; gap: .4rem; }
.dot { width: .55rem; height: .55rem; border-radius: 50%; background: #d6b25a; display: inline-block; }
main { max-width: 1080px; margin: 0 auto; padding: 0 16px 4rem; }
.foot { max-width: 1080px; margin: 0 auto; padding: 1.5rem 16px 3rem; color: var(--muted); font: .85rem/1.5 var(--f-ui); border-top: 1px solid var(--line); }

/* inicio */
.hero { padding: 3.5rem 0 2rem; max-width: 46rem; }
.hero h1 { margin-bottom: .3em; }
.hero__lead { font-size: 1.25rem; color: var(--muted); }
.temas { display: grid; gap: 14px; }
.tema { display: flex; gap: 1.1rem; align-items: stretch; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: inherit; overflow: hidden; transition: border-color .15s, transform .15s; }
a.tema:hover { border-color: var(--green); }
.tema__n { flex: 0 0 4.6rem; display: grid; place-items: center; background: var(--green); color: var(--green-ink); font: 850 2.4rem/1 var(--f-head); font-stretch: 125%; }
.tema__body { padding: 1rem 1rem 1rem 0; display: grid; gap: .25rem; }
.tema__t { font: 800 1.2rem/1.2 var(--f-head); font-stretch: 108%; }
.tema__norma { font: 600 .9rem var(--f-ui); color: var(--brass); }
.tema__d { color: var(--muted); font-size: 1rem; }
.tema--next { border-style: dashed; background: transparent; }
.tema--next .tema__n { background: transparent; color: var(--muted); border-right: 1px dashed var(--line); }

/* tema: navegación */
.thead { padding: 1.8rem 0 1rem; }
.thead .crumb { font: .9rem var(--f-ui); margin-bottom: .6rem; }
.thead h1 { font-size: clamp(1.7rem, 4.2vw, 2.6rem); margin-bottom: .2em; }
.thead .norma { color: var(--muted); font-family: var(--f-ui); font-size: .95rem; }
.tabs { position: sticky; top: 0; z-index: 10; background: var(--paper); border-bottom: 2px solid var(--ink); display: flex; gap: 2px; overflow-x: auto; margin: 0 -16px; padding: 0 16px; scrollbar-width: thin; }
.tabs a { flex: 0 0 auto; padding: .75rem .95rem; text-decoration: none; color: var(--muted); font: 700 .95rem var(--f-ui); border-bottom: 4px solid transparent; margin-bottom: -2px; white-space: nowrap; }
.tabs a:hover { color: var(--ink); }
.tabs a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--brass); }
.view { padding: 1.6rem 0; }
.note { background: var(--brass-soft); border-left: 4px solid var(--brass); padding: .7rem 1rem; font: .92rem/1.5 var(--f-ui); margin: 0 0 1.4rem; border-radius: 0 var(--radius) var(--radius) 0; }

/* componentes */
.btn { font: 700 .98rem var(--f-ui); padding: .65rem 1.1rem; border-radius: var(--radius); border: 2px solid var(--ink); background: var(--card); color: var(--ink); cursor: pointer; text-decoration: none; display: inline-block; }
.btn:hover { background: var(--ink); color: var(--paper); }
.btn--primary { background: var(--green); border-color: var(--green); color: var(--green-ink); }
.btn--primary:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.row { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin: 0 0 1.2rem; }
.chip { font: 600 .85rem var(--f-ui); padding: .35rem .7rem; border: 1px solid var(--line); border-radius: 99px; background: var(--card); color: var(--ink); cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.3rem; }
.grid2 { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.dl { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1.2rem; margin: 0; }
.dl dt { font: 700 .92rem var(--f-ui); color: var(--muted); }
.dl dd { margin: 0; }
@media (max-width: 560px) { .dl { grid-template-columns: 1fr; } .dl dd { margin-bottom: .5rem; } }
.ref { font: 700 .8rem var(--f-ui); color: var(--brass); }

/* plan de estudio */
.plan { counter-reset: paso; display: grid; gap: 10px; padding: 0; list-style: none; margin: 1rem 0 0; }
.plan li { counter-increment: paso; display: grid; grid-template-columns: 2.4rem 1fr auto; gap: .9rem; align-items: start; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1rem; }
.plan li::before { content: counter(paso); font: 850 1.6rem/1 var(--f-head); color: var(--brass); }
.plan b { font-family: var(--f-head); }
.plan span { color: var(--muted); display: block; }
@media (max-width: 560px) { .plan li { grid-template-columns: 2rem 1fr; } .plan li .btn { grid-column: 2; justify-self: start; } }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 1.4rem 0; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem 1rem; }
.stat b { display: block; font: 800 1.8rem/1.1 var(--f-head); }
.stat span { color: var(--muted); font: .85rem var(--f-ui); }

/* resumen / acordeones */
details.acc { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin: 0 0 10px; }
details.acc > summary { cursor: pointer; padding: .9rem 1.1rem; font: 800 1.08rem/1.25 var(--f-head); font-stretch: 105%; list-style: none; display: flex; gap: .8rem; align-items: baseline; justify-content: space-between; }
details.acc > summary::-webkit-details-marker { display: none; }
details.acc > summary::after { content: "+"; font: 700 1.4rem/1 var(--f-ui); color: var(--brass); }
details.acc[open] > summary::after { content: "–"; }
details.acc > .acc__body { padding: 0 1.2rem 1.1rem; }
.acc__arts { font: 600 .85rem var(--f-ui); color: var(--muted); font-weight: 600; margin-left: auto; padding-right: .6rem; white-space: nowrap; }
.clave { font: 600 1rem/1.45 var(--f-ui); background: var(--ok-soft); border-left: 4px solid var(--ok); padding: .6rem .9rem; margin: 0 0 .9rem; border-radius: 0 var(--radius) var(--radius) 0; }
ul.pts { padding-left: 1.2rem; margin: 0; }
ul.pts li { margin-bottom: .55rem; }
.tools { display: flex; gap: .6rem; flex-wrap: wrap; margin: 0 0 1rem; }

/* esquema */
.tree, .tree ul { list-style: none; margin: 0; padding-left: 1.15rem; border-left: 2px solid var(--line); }
.tree { border-left: 0; padding-left: 0; }
.tree li { margin: .2rem 0; }
.tree summary { cursor: pointer; font: 700 1rem var(--f-ui); padding: .2rem 0; }
.tree .leaf { padding: .15rem 0 .15rem .2rem; color: var(--ink); }
.tree > li > details > summary { font: 800 1.1rem var(--f-head); font-stretch: 108%; }

/* tablas */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); margin: 0 0 1.6rem; }
table { border-collapse: collapse; width: 100%; font: .95rem/1.45 var(--f-ui); min-width: 560px; }
th { text-align: left; background: var(--ink); color: var(--paper); padding: .6rem .8rem; font-weight: 700; }
td { padding: .55rem .8rem; border-top: 1px solid var(--line); vertical-align: top; }
tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--line) 22%, transparent); }
td.n { font-weight: 700; white-space: nowrap; }
.mn { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); margin-bottom: 1.6rem; }
.mn .panel h3 { font-size: 1rem; margin-bottom: .3rem; }
.mn .panel p { margin: 0; }
.filterbox { width: 100%; padding: .7rem .9rem; font: 1rem var(--f-ui); border: 2px solid var(--ink); border-radius: var(--radius); background: var(--card); color: var(--ink); margin-bottom: 1rem; }

/* tarjetas */
.deck { max-width: 640px; margin: 0 auto; }
.card3d { perspective: 1200px; margin: 1rem 0; }
.card { position: relative; min-height: 300px; width: 100%; cursor: pointer; border: 0; background: none; padding: 0; text-align: left; color: inherit; transform-style: preserve-3d; transition: transform .45s; font: inherit; display: block; }
.card.flip { transform: rotateY(180deg); }
.face { position: absolute; inset: 0; backface-visibility: hidden; background: var(--card); border: 2px solid var(--ink); border-radius: 10px; padding: 1.5rem; display: flex; flex-direction: column; justify-content: center; overflow: auto; }
.face--back { transform: rotateY(180deg); background: var(--green); color: var(--green-ink); border-color: var(--green); }
.face .ref { position: absolute; top: .8rem; right: 1rem; }
.face--back .ref { color: #d6b25a; }
.face .q { font: 800 1.4rem/1.25 var(--f-head); font-stretch: 105%; }
.face .a { font-size: 1.1rem; line-height: 1.55; }
.hint { text-align: center; color: var(--muted); font: .88rem var(--f-ui); }
.rate { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.rate .btn { padding: .75rem .4rem; }
.rate .no { border-color: var(--bad); color: var(--bad); } .rate .no:hover { background: var(--bad); color: #fff; }
.rate .mid { border-color: var(--brass); color: var(--brass); } .rate .mid:hover { background: var(--brass); color: #fff; }
.rate .yes { border-color: var(--ok); color: var(--ok); } .rate .yes:hover { background: var(--ok); color: #fff; }
.boxes { display: flex; gap: 8px; margin: 0 0 .8rem; font: 700 .85rem var(--f-ui); flex-wrap: wrap; }
.boxes span { background: var(--card); border: 1px solid var(--line); border-radius: 99px; padding: .25rem .7rem; }
.bar { height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; margin: .6rem 0 1rem; }
.bar i { display: block; height: 100%; background: var(--brass); transition: width .25s; }
@media (prefers-reduced-motion: reduce) { .card, .bar i { transition: none; } }
@media (max-width: 560px) { .card { min-height: 360px; } }

/* huecos */
.cloze { font-size: 1.2rem; line-height: 2.2; }
.cloze input { font: 600 1rem var(--f-ui); border: 0; border-bottom: 3px solid var(--ink); background: var(--brass-soft); color: var(--ink); padding: .15rem .4rem; margin: 0 .15rem; text-align: center; border-radius: 3px 3px 0 0; }
.cloze input.ok { border-color: var(--ok); background: var(--ok-soft); }
.cloze input.bad { border-color: var(--bad); background: var(--bad-soft); }
.cloze .sol { color: var(--ok); font: 700 .95rem var(--f-ui); }

/* artículos */
.art { scroll-margin-top: 70px; }
.art p { margin: 0 0 .6rem; }
.art p.l1 { margin-left: 1.2rem; } .art p.l2 { margin-left: 2.4rem; }
.art .cap { font: 600 .82rem var(--f-ui); color: var(--muted); }
mark { background: #ffe38a; color: #000; padding: 0 .1em; }

/* examen */
.exam { max-width: 760px; margin: 0 auto; }
.exam__top { display: flex; justify-content: space-between; font: 700 .9rem var(--f-ui); color: var(--muted); }
.qtext { font: 800 1.4rem/1.3 var(--f-head); font-stretch: 105%; margin: .6rem 0 1.1rem; }
.opts { display: grid; gap: 9px; padding: 0; margin: 0; list-style: none; }
.opt { display: grid; grid-template-columns: 2rem 1fr; gap: .6rem; text-align: left; width: 100%; padding: .85rem 1rem; background: var(--card); border: 2px solid var(--line); border-radius: var(--radius); font: 1.02rem/1.45 var(--f-body); color: var(--ink); cursor: pointer; }
.opt b { font: 800 1.05rem var(--f-head); color: var(--muted); }
.opt:hover:not([disabled]) { border-color: var(--ink); }
.opt.ok { border-color: var(--ok); background: var(--ok-soft); }
.opt.bad { border-color: var(--bad); background: var(--bad-soft); }
.opt[disabled] { cursor: default; }
.why { margin-top: 1rem; border-radius: var(--radius); padding: 1rem 1.1rem; border-left: 5px solid; font-size: 1rem; }
.why.ok { background: var(--ok-soft); border-color: var(--ok); }
.why.bad { background: var(--bad-soft); border-color: var(--bad); }
.why h3 { font-size: 1.05rem; margin-bottom: .3rem; }
.why blockquote { margin: .6rem 0 0; padding-left: .8rem; border-left: 3px solid var(--line); font-style: italic; color: var(--muted); }
.score { text-align: center; padding: 1.6rem 0 1rem; }
.score b { font: 850 4.5rem/1 var(--f-head); font-stretch: 125%; display: block; }
.score span { font: 700 1.05rem var(--f-ui); color: var(--muted); }
.review { margin-top: 1.4rem; display: grid; gap: 10px; }
.review .panel { border-left: 5px solid var(--bad); }
.review .panel.ok { border-left-color: var(--ok); }
.review .t { font: 700 1rem var(--f-ui); }
.pool { font: .9rem var(--f-ui); color: var(--muted); margin-top: .5rem; }
.hist { font: .95rem var(--f-ui); }
.hist li { margin-bottom: .3rem; }

/* cabecera: usuario */
.top__name { font-weight: 600; }
.top__form { margin: 0; display: inline; }
.top__btn { font: 700 .85rem var(--f-ui); color: var(--green-ink); background: transparent; border: 1px solid rgba(244,247,241,.55); border-radius: var(--radius); padding: .3rem .7rem; cursor: pointer; text-decoration: none; display: inline-block; }
.top__btn:hover { background: var(--green-ink); color: var(--green); }
.top__user { gap: .6rem; }

/* inicio: tema con subtemas */
.hero__note { font: .95rem/1.5 var(--f-ui); color: var(--muted); }
.grupo { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.grupo__h { display: flex; gap: 1.1rem; align-items: stretch; border-bottom: 1px solid var(--line); }
.grupo__h > div { padding: 1rem 1rem 1rem 0; }
.grupo__h h2 { font-size: 1.3rem; margin-bottom: .2em; }
.grupo__h p { margin: 0; color: var(--muted); font-size: 1rem; }
.subtemas { list-style: none; margin: 0; padding: 0; }
.sub { display: flex; gap: 1.1rem; padding: .9rem 1rem .9rem 0; color: inherit; text-decoration: none; border-top: 1px solid var(--line); }
.subtemas > li:first-child .sub { border-top: 0; }
a.sub:hover { background: var(--paper); }
.sub__n { flex: 0 0 4.6rem; text-align: center; font: 800 1.35rem/1.3 var(--f-head); font-stretch: 118%; color: var(--green); }
@media (prefers-color-scheme: dark) { .sub__n { color: #8fd3a8; } }
.sub__body { display: grid; gap: .2rem; }
.sub__t { font: 800 1.1rem/1.25 var(--f-head); font-stretch: 105%; }
.sub--next { color: var(--muted); border-top: 1px dashed var(--line); }
.sub--next .sub__n { color: var(--muted); }
.sub--next .sub__t { font-weight: 600; }

/* login */
.auth { max-width: 26rem; margin: 3rem auto; }
.auth h1 { font-size: clamp(1.8rem, 5vw, 2.4rem); }
.auth__lead { color: var(--muted); font-family: var(--f-ui); }
.alert { background: var(--bad-soft); border-left: 4px solid var(--bad); padding: .7rem 1rem; font: .95rem/1.5 var(--f-ui); border-radius: 0 var(--radius) var(--radius) 0; }
.form { display: grid; gap: .35rem; margin: 1.2rem 0; }
.form label { font: 700 .92rem var(--f-ui); margin-top: .6rem; }
.form input { font: 1.05rem var(--f-ui); padding: .65rem .8rem; border: 2px solid var(--line); border-radius: var(--radius); background: var(--card); color: var(--ink); width: 100%; }
.form input:focus { border-color: var(--green); }
.form .btn { margin-top: 1rem; justify-self: start; }
.hint { font: .85rem/1.4 var(--f-ui); color: var(--muted); margin: 0; }
.auth__alt { font: .95rem var(--f-ui); color: var(--muted); }
.trampa { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* palabras clave en la vista de artículos */
.kwbar { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1rem; margin: 0 0 .6rem; }
.kwbar .hint { margin: 0; flex: 1 1 18rem; }
.seg { display: inline-flex; border: 2px solid var(--ink); border-radius: var(--radius); overflow: hidden; }
.seg button { font: 700 .85rem var(--f-ui); padding: .45rem .8rem; background: var(--card); color: var(--ink); border: 0; border-right: 1px solid var(--line); cursor: pointer; }
.seg button:last-child { border-right: 0; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
mark.kw { background: linear-gradient(to top, var(--kw) 42%, transparent 42%); color: inherit; font-weight: 600; padding: 0 .06em; }
.kwhide mark.kw:not(.rev) { background: var(--kw); color: transparent; border-radius: 3px; cursor: pointer; user-select: none; box-shadow: 0 0 0 1px var(--kw); }
.kwhide mark.kw.rev { background: linear-gradient(to top, var(--kw) 42%, transparent 42%); cursor: pointer; }
.kwhide mark.kw { cursor: pointer; }
.kwbar .hint { text-align: left; }

/* ---------- selector de dificultad ---------- */
.levels { border: 0; padding: 0; margin: 1.2rem 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.levels legend { font: 700 .9rem var(--f-ui); color: var(--muted); padding: 0; margin-bottom: .5rem; }
.lvl { position: relative; display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem .9rem .8rem; cursor: pointer; }
.lvl input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.lvl__t { display: block; font: 800 1.05rem var(--f-head); }
.lvl__s { display: block; font: .82rem/1.3 var(--f-ui); color: var(--muted); margin: .15rem 0 .4rem; }
.lvl__n { font: 700 .78rem var(--f-ui); color: var(--brass); }
.lvl:has(input:checked) { border-color: var(--ink); box-shadow: inset 0 0 0 2px var(--ink); }
.lvl:has(input:focus-visible) { outline: 3px solid var(--brass); outline-offset: 2px; }
.badge { display: inline-block; font: 700 .72rem var(--f-ui); padding: .1rem .5rem; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); margin-right: .4rem; vertical-align: 1px; }
.badge--1 { border-color: #3f7d4e; color: #3f7d4e; }
.badge--2 { border-color: #a97b1c; color: #a97b1c; }
.badge--3 { border-color: #a23a3a; color: #a23a3a; }
@media (prefers-color-scheme: dark) { .badge--1 { color: #7cc48d; border-color: #7cc48d; } .badge--2 { color: #e0b44f; border-color: #e0b44f; } .badge--3 { color: #e58a8a; border-color: #e58a8a; } }