:root {
  --bg: #faf8f4;
  --surface: #ffffff;
  --ink: #1f1d1a;
  --muted: #6b665e;
  --line: #e6e1d8;
  --accent: #b4410f;
  --accent-soft: #fbe9df;
  --ok: #1f7a4d;
  --ok-soft: #e3f3ea;
  --no: #b3261e;
  --no-soft: #fbe6e4;
  --warn: #8a6100;
  --warn-soft: #fff3d6;
  --de: #0f5c6e;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.04);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161513; --surface: #201e1b; --ink: #ede9e2; --muted: #a59f95; --line: #34312c;
    --accent: #f08a55; --accent-soft: #3a2519; --ok: #5cc98f; --ok-soft: #1b3326; --no: #f07a70; --no-soft: #3a1f1c;
    --warn: #e7b547; --warn-soft: #362c14; --de: #6cc3d5; --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #161513; --surface: #201e1b; --ink: #ede9e2; --muted: #a59f95; --line: #34312c;
  --accent: #f08a55; --accent-soft: #3a2519; --ok: #5cc98f; --ok-soft: #1b3326; --no: #f07a70; --no-soft: #3a1f1c;
  --warn: #e7b547; --warn-soft: #362c14; --de: #6cc3d5; --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--accent); }
h1, h2, h3, h4 { font-family: Fraunces, Georgia, serif; line-height: 1.25; letter-spacing: -.01em; }
h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); margin: .4em 0 .2em; }
h2 { font-size: 1.5rem; margin: 1.6em 0 .5em; }
h3 { font-size: 1.15rem; margin: 1.3em 0 .4em; }
h4 { font-size: 1rem; margin: 1.2em 0 .3em; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.lead { font-size: 1.15rem; }
.subtitle { color: var(--de); margin-top: 0; font-style: italic; }
[lang="de"] { }

.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px; background: var(--bg); border-bottom: 1px solid var(--line);
}
.brand { font-family: Fraunces, Georgia, serif; font-weight: 700; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand em { font-weight: 600; color: var(--muted); font-style: normal; }
.flag { width: 18px; height: 14px; border-radius: 2px; background: linear-gradient(#222 0 33%, #c0392b 33% 66%, #e6b800 66%); flex: none; }
.topnav { display: flex; gap: 16px; }
.topnav a { color: var(--ink); text-decoration: none; font-weight: 500; }
.badge { display: inline-block; min-width: 1.4em; padding: 0 .4em; border-radius: 99px; background: var(--accent); color: #fff; font-size: .75rem; text-align: center; }

main { max-width: 860px; margin: 0 auto; padding: 16px 16px 80px; outline: none; }
.foot { text-align: center; color: var(--muted); font-size: .8rem; padding: 24px 16px 40px; }
.loading { color: var(--muted); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin: 16px 0; box-shadow: var(--shadow); }
.card.error { border-color: var(--no); }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.row p { margin: 0; flex: 1 1 260px; }

.btn {
  display: inline-block; border: 1px solid var(--accent); background: var(--accent); color: #fff; font: inherit; font-weight: 600;
  padding: 8px 16px; border-radius: 999px; cursor: pointer; text-decoration: none; line-height: 1.3;
}
.btn:hover { filter: brightness(1.07); }
.btn:disabled { opacity: .5; cursor: default; filter: none; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.big { font-size: 1.1rem; padding: 12px 28px; }
.btn.rec { background: var(--no); border-color: var(--no); color: #fff; }

.crumbs { font-size: .9rem; color: var(--muted); margin-top: 8px; }
.crumbs a { color: var(--muted); }

.hero { padding: 24px 0 8px; }
.levels { display: grid; gap: 14px; }
.level-card {
  display: grid; grid-template-columns: 88px 1fr; gap: 16px; align-items: center; text-decoration: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow);
}
.level-card:hover { border-color: var(--accent); }
.level-card p { margin: .3em 0; }
.level-name { font-family: Fraunces, Georgia, serif; font-size: 2.6rem; font-weight: 700; color: var(--accent); text-align: center; }
.level-exam { font-weight: 600; }
.progressbar { height: 6px; background: var(--line); border-radius: 99px; overflow: hidden; margin: 8px 0 4px; }
.progressbar span { display: block; height: 100%; background: var(--accent); }

.topics { list-style: none; padding: 0; margin: 20px 0; display: grid; gap: 10px; }
.topics li > a, .topics li > div {
  display: flex; gap: 14px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: var(--ink);
}
.topics li > a:hover { border-color: var(--accent); }
.topics li.disabled > div { opacity: .6; }
.tnum { font-family: Fraunces, Georgia, serif; font-size: 1.4rem; color: var(--accent); min-width: 2ch; }
.ttitle { font-weight: 600; }
.tgram { color: var(--muted); font-size: .88rem; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip { display: inline-block; font-size: .78rem; padding: 2px 10px; border-radius: 99px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
.chip.muted { color: var(--muted); }
.chip.pass { background: var(--ok-soft); border-color: transparent; color: var(--ok); }
.chip.fail { background: var(--no-soft); border-color: transparent; color: var(--no); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 18px 0 8px; overflow-x: auto; }
.tabs a { padding: 8px 14px; text-decoration: none; color: var(--muted); font-weight: 500; white-space: nowrap; border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--ink); border-bottom-color: var(--accent); }

.goals ul { margin: .3em 0; padding-left: 1.2em; }
.goals h3 { margin-top: 0; }

.lesson { font-size: 1rem; }
.lesson h2 { border-top: 1px solid var(--line); padding-top: 1em; }
.lesson blockquote { margin: 1em 0; padding: 10px 16px; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 8px 8px 0; }
.lesson code { background: var(--bg); padding: 0 4px; border-radius: 4px; }
.lesson del { color: var(--no); }
.tablewrap { overflow-x: auto; margin: .8em 0; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; background: var(--surface); }
th, td { border-bottom: 1px solid var(--line); padding: 7px 10px; text-align: left; vertical-align: top; }
th { font-weight: 600; background: var(--bg); }
.de { color: var(--de); white-space: normal; }
.spk {
  border: none; background: transparent; cursor: pointer; font-size: .9em; padding: 0 4px 0 0; line-height: 1; vertical-align: baseline; opacity: .75;
}
.spk:hover, .spk.playing { opacity: 1; transform: scale(1.15); }
.next { margin: 28px 0; text-align: right; }

.vocab { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.vrow { display: grid; grid-template-columns: 28px minmax(140px, 1.2fr) 1fr 1.6fr; gap: 10px; padding: 9px 12px; border-bottom: 1px solid var(--line); align-items: start; }
.vrow:last-child { border-bottom: none; }
.vde strong { color: var(--de); }
.vex span[lang] { font-style: italic; }
@media (max-width: 640px) {
  .vrow { grid-template-columns: 28px 1fr; }
  .ves, .vex { grid-column: 2; }
}

.exercise header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.exercise header h3 { margin: 0; }
.item { padding: 10px 0; border-bottom: 1px dashed var(--line); }
.item:last-child { border-bottom: none; }
.item.ok { background: linear-gradient(90deg, var(--ok-soft), transparent 70%); }
.item.no { background: linear-gradient(90deg, var(--no-soft), transparent 70%); }
.item.case { background: linear-gradient(90deg, var(--warn-soft), transparent 70%); }
.q { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.n { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 1.8em; }
.opts { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 6px 0 0 2.2em; }
.opt { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.fb { margin: 6px 0 0 2.2em; font-size: .92rem; }
.item.ok .fb { color: var(--ok); }
.item.no .fb { color: var(--no); }
.item.case .fb { color: var(--warn); }
.transcript { display: block; margin-top: 6px; padding: 6px 10px; background: var(--bg); border-radius: 6px; color: var(--muted); font-style: italic; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.result.good { color: var(--ok); font-weight: 600; }
.result.bad { color: var(--no); font-weight: 600; }

input[type="text"], select, textarea {
  font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px;
}
input[type="text"]:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
input.gap { padding: 2px 6px; margin: 0 4px; min-width: 4ch; text-align: center; }
input.gap.wrong { border-color: var(--no); }
input.wide { width: 100%; margin: 6px 0 0; }
textarea { width: 100%; resize: vertical; }
.gapline { line-height: 2.2; }
.match { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.mleft { font-weight: 500; }

.built { min-height: 40px; margin: 6px 0 6px 2.2em; padding: 6px; border: 1px dashed var(--line); border-radius: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.pool { margin-left: 2.2em; display: flex; flex-wrap: wrap; gap: 6px; }
.chip.word { font-size: .95rem; padding: 4px 12px; cursor: pointer; }
.chip.word.on { background: var(--accent-soft); border-color: var(--accent); }
.chip.word:disabled { opacity: .3; cursor: default; }

.exam-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.exam-card h3 { margin-top: 0; }
.sticky { position: sticky; top: 52px; z-index: 10; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 0; background: var(--bg); border-bottom: 1px solid var(--line); }
.modnav { display: flex; gap: 14px; overflow-x: auto; }
.modnav a { color: var(--ink); text-decoration: none; font-weight: 500; }
.timer { font-variant-numeric: tabular-nums; color: var(--muted); }
.module h2 { margin-top: 1.4em; }
.teil h3 { margin-top: 0; }
.instr { font-weight: 600; margin-bottom: 0; }
.btn.listen { margin: 6px 0 0 2.2em; font-size: .9rem; padding: 5px 14px; }
.text { white-space: pre-wrap; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; margin-bottom: 8px; }
.sign {
  display: inline-block; font-weight: 600; background: #fdf6d8; color: #2b2a26; border: 2px solid #2b2a26; border-radius: 4px; padding: 10px 14px; margin: 4px 0 8px;
  font-family: "Arial Narrow", Arial, sans-serif; letter-spacing: .01em;
}
.tfrow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; padding: 5px 4px; border-radius: 6px; }
.tfrow .stmt { flex: 1 1 260px; }
.tfrow.ok { background: var(--ok-soft); }
.tfrow.no { background: var(--no-soft); }
.ab { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 8px 0 0 2.2em; }
@media (max-width: 560px) { .ab { grid-template-columns: 1fr; margin-left: 0; } }
.abcard { display: flex; gap: 8px; align-items: flex-start; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); cursor: pointer; }
.abk { font-weight: 700; color: var(--accent); }
.form { border: 1px solid var(--line); border-radius: 8px; padding: 12px; }
.ftitle { font-weight: 700; margin-bottom: 8px; }
.frow { display: grid; grid-template-columns: 160px 1fr; gap: 10px; align-items: center; padding: 4px; border-radius: 6px; }
.frow.ok { background: var(--ok-soft); }
.frow.no { background: var(--no-soft); }
.frow input[readonly] { opacity: .7; }
@media (max-width: 480px) { .frow { grid-template-columns: 1fr; gap: 2px; } }
.keywords { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0; }
.kw { border: 2px solid var(--ink); border-radius: 6px; padding: 4px 12px; font-weight: 600; }
.cardword { display: inline-flex; flex-direction: column; align-items: center; min-width: 150px; padding: 10px 18px; border: 2px solid var(--ink); border-radius: 10px; margin: 4px 0; }
.cardword strong { font-size: 1.2rem; }
.recorder { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 8px; }
.recorder audio { height: 36px; max-width: 100%; }
.selfeval { margin-top: 12px; padding: 12px; background: var(--warn-soft); border-radius: 8px; display: grid; gap: 6px; }
.model pre { white-space: pre-wrap; font: inherit; background: var(--surface); padding: 10px; border-radius: 6px; margin: 6px 0; }
.submitbar { text-align: center; margin: 32px 0; }
.results { border: 2px solid var(--accent); }
.results h2 { margin-top: 0; }
.scores { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin: 10px 0; }
.score { padding: 12px; border-radius: 10px; text-align: center; display: grid; }
.score strong { font-size: 1.6rem; font-family: Fraunces, Georgia, serif; }
.score.pass { background: var(--ok-soft); color: var(--ok); }
.score.fail { background: var(--no-soft); color: var(--no); }

.flashcard { text-align: center; padding: 32px 18px; }
.fc-front { font-size: 1.6rem; font-family: Fraunces, Georgia, serif; margin-bottom: 18px; }
.fc-back { display: grid; gap: 6px; }
.fc-back[hidden] { display: none; }
.fc-de { font-size: 1.4rem; color: var(--de); }
.flashcard .actions { justify-content: center; }

@media (max-width: 480px) { .brand em { display: none; } .item .q .n { min-width: 1.4em; } }

/* Frase alemana con su traducción debajo */
.de.has-tr { display: inline-flex; flex-direction: column; vertical-align: top; margin: 2px 0; }
.de .tr { color: var(--muted); font-size: .86em; font-style: italic; line-height: 1.35; padding-left: 1.45em; }
blockquote .de.has-tr { display: flex; margin: 4px 0 8px; }
li .de.has-tr + .de.has-tr, li .de.has-tr { margin-right: 4px; }
blockquote .de.has-tr + br { display: none; }

/* A2/B1: preguntas con varios apartados */
.subq { padding: 6px 4px; border-radius: 6px; }
.subq.ok { background: var(--ok-soft); }
.subq.no { background: var(--no-soft); }
.subq .fb { margin-left: 2.2em; font-size: .9rem; }
.subq.ok .fb { color: var(--ok); }
.subq.no .fb { color: var(--no); }
.ads { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 8px; margin: 6px 0 12px; }
.ad { display: flex; gap: 8px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); font-size: .95rem; }
.topiccard { display: grid; gap: 8px; justify-items: center; text-align: center; padding: 14px 18px; border: 2px solid var(--ink); border-radius: 10px; margin: 4px 0; }
.topiccard strong { font-size: 1.15rem; }
.agendas { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; margin: 8px 0; }
.agenda { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: var(--bg); }
.agenda[hidden] { display: none; }
.agenda ul { margin: 6px 0 0; padding-left: 1.1em; }
.subq .n { display: inline-block; min-width: 2.2em; }
/* B1: diapositivas de la presentación y comentarios de lectores */
.slides { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; margin: 8px 0; }
.slide { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: var(--bg); min-height: 120px; }
.slide small { display: block; color: var(--muted); margin-bottom: 4px; }
.slide strong { display: block; margin-bottom: 6px; }
.slide p { margin: 0; font-size: 0.92rem; }
.subq.comment .text { margin-bottom: 6px; }
[hidden] { display: none !important; }