/* Lektionsansicht: rahmt einen vorhandenen Lernzettel, ohne dessen Inhalt zu ändern. */

.lesson-page { min-height: 100vh; background: var(--cream); }

.lesson-bar { position: sticky; top: 0; z-index: 40; border-bottom: 1px solid var(--line); background: rgba(255, 248, 237, .94); backdrop-filter: blur(10px); }
.lesson-bar-inner { display: flex; align-items: center; gap: 16px; width: min(100% - 32px, 860px); margin: 0 auto; padding: 14px 0 6px; }
.lesson-close { display: grid; flex: 0 0 auto; width: 42px; height: 42px; place-items: center; border-radius: 50%; color: var(--muted); transition: background .15s, color .15s; }
.lesson-close:hover, .lesson-close:focus-visible { color: var(--ink); background: var(--cream-deep); }
.lesson-close svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2.6; stroke-linecap: round; }

.lesson-progress { position: relative; flex: 1; height: 16px; overflow: hidden; border-radius: 999px; background: var(--cream-deep); }
.lesson-progress span { position: absolute; inset: 0 auto 0 0; width: 0; border-radius: inherit; background: var(--teal); transition: width .25s ease-out; }
.lesson-progress span::after { content: ""; position: absolute; top: 4px; right: 8px; left: 8px; height: 4px; border-radius: 999px; background: rgba(255, 255, 255, .38); }

.lesson-points { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 5px; color: #b98500; font-weight: 900; }
.lesson-points svg { width: 22px; height: 22px; fill: var(--yellow); stroke: #e0a800; stroke-width: 1.4; stroke-linejoin: round; }

.lesson-bar-meta { display: flex; align-items: baseline; gap: 10px; width: min(100% - 32px, 860px); margin: 0 auto; padding: 0 0 10px 58px; }
.lesson-bar-meta span { flex: 0 0 auto; white-space: nowrap; color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.lesson-bar-meta strong { min-width: 0; overflow: hidden; color: var(--ink); font-size: .92rem; text-overflow: ellipsis; white-space: nowrap; }

.lesson-main { width: min(100% - 32px, 860px); margin: 0 auto; padding: 22px 0 64px; }
.lesson-frame { overflow: hidden; border: 1px solid var(--line); border-radius: 26px; background: var(--paper); box-shadow: var(--shadow); }
.lesson-frame iframe { display: block; width: 100%; height: 80vh; border: 0; }

.lesson-finish-card { display: flex; align-items: center; gap: 18px; margin-top: 26px; border: 2px solid var(--line); border-radius: 24px; padding: 18px 22px; background: var(--cream-panel); }
.lesson-finish-card img { width: 72px; height: 72px; flex: 0 0 auto; object-fit: contain; }
.lesson-finish-card div { flex: 1; }
.lesson-finish-card strong { display: block; font-size: 1.1rem; }
.lesson-finish-card p { margin: 4px 0 0; color: var(--muted); }
.lesson-finish-card .primary-cta { flex: 0 0 auto; }

/* Abschluss-Bildschirm */
.lesson-done { position: fixed; inset: 0; z-index: 90; display: grid; place-items: center; padding: 16px; overflow-y: auto; background: rgba(255, 248, 237, .96); animation: lesson-fade .25s ease-out; }
.lesson-done[hidden] { display: none; }
.lesson-done-card { width: min(100%, 560px); border: 1px solid var(--line); border-radius: 32px; padding: 30px 30px 24px; background: var(--paper); box-shadow: var(--shadow); text-align: center; animation: lesson-pop .35s cubic-bezier(.2, 1.4, .4, 1); }
.lesson-done-figure { position: relative; display: inline-block; margin-bottom: 6px; }
.lesson-done-figure img { width: 150px; height: 150px; object-fit: contain; }
.lesson-done-bubble { position: absolute; top: 4px; left: calc(100% - 18px); min-width: 130px; border: 2px solid var(--line); border-radius: 18px 18px 18px 4px; padding: 8px 12px; background: var(--cream-panel); font-weight: 900; text-align: left; white-space: nowrap; }
.lesson-done-bubble small { display: block; color: var(--muted); font-weight: 700; }
.lesson-done-card .eyebrow { margin: 0 0 4px; }
.lesson-done-card h1 { margin: 0 0 22px; font-size: clamp(1.5rem, 4vw, 2rem); line-height: 1.15; }

.lesson-done-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 22px; }
.lesson-done-stats article { border: 2px solid; border-radius: 20px; padding: 12px 8px; }
.lesson-done-stats small { display: block; font-size: .7rem; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.lesson-done-stats strong { display: block; margin: 4px 0 2px; color: var(--ink); font-size: 1.5rem; }
.lesson-done-stats span { color: var(--muted); font-size: .78rem; }
.lesson-done-stats .is-points { border-color: var(--yellow); background: #fff6d8; }
.lesson-done-stats .is-points small { color: #b98500; }
.lesson-done-stats .is-streak { border-color: var(--coral); background: #fff0eb; }
.lesson-done-stats .is-streak small { color: #d9502f; }
.lesson-done-stats .is-goal { border-color: var(--teal); background: #e6f8f6; }
.lesson-done-stats .is-goal small { color: #13867b; }
.lesson-done-stats .is-goal i { display: block; height: 6px; margin: 8px 6px 0; overflow: hidden; border-radius: 999px; background: rgba(19, 134, 123, .18); }
.lesson-done-stats .is-goal i b { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--teal); transition: width .25s ease; }

.target-chooser { margin: 0 0 22px; border: 2px solid var(--line); border-radius: 22px; padding: 18px; background: var(--cream-panel); }
.target-chooser[hidden] { display: none; }
.target-chooser h2 { margin: 0 0 14px; font-size: 1.2rem; }
.target-chooser > p:last-child { margin: 12px 0 0; color: var(--muted); font-size: .8rem; font-weight: 700; }
.target-choices { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.target-choices button { position: relative; display: grid; gap: 2px; border: 2px solid var(--line); border-radius: 16px; padding: 13px 8px; color: var(--ink); background: white; font: inherit; cursor: pointer; }
.target-choices button:hover, .target-choices button:focus-visible { border-color: var(--blue); outline: 0; }
.target-choices button.is-recommended { border-color: var(--yellow); }
.target-choices button small { position: absolute; top: -9px; left: 50%; border-radius: 999px; padding: 2px 7px; color: var(--ink); background: var(--yellow); font-size: .57rem; font-weight: 900; transform: translateX(-50%); }
.target-choices button strong { font-size: .95rem; }
.target-choices button span { color: var(--muted); font-size: .78rem; font-weight: 800; }

.lesson-done-actions { display: grid; gap: 10px; }
.lesson-done-actions a { justify-content: center; }
.lesson-done-actions .secondary-cta { display: flex; align-items: center; min-height: 46px; margin-top: 4px; border: 1px solid var(--line); border-radius: 16px; padding: 0 18px; color: var(--muted); background: var(--cream-panel); font-size: .88rem; font-weight: 800; text-decoration: none; transition: background .15s, color .15s; }
.lesson-done-actions .secondary-cta:hover, .lesson-done-actions .secondary-cta:focus-visible { color: var(--ink); background: var(--cream-deep); }
.lesson-done-next { margin: -2px 0 4px; color: var(--muted); font-size: .82rem; font-weight: 700; }
.lesson-done-note { margin: 16px 0 0; color: var(--muted); font-size: .78rem; }

@keyframes lesson-fade { from { opacity: 0; } }
@keyframes lesson-pop { from { opacity: 0; transform: translateY(18px) scale(.96); } }

@media (max-width: 650px) {
  .lesson-bar-inner { gap: 10px; padding-top: 10px; }
  .lesson-bar-meta { padding-left: 52px; }
  .lesson-main { padding-top: 14px; }
  .lesson-frame { border-radius: 18px; }
  .lesson-finish-card { flex-wrap: wrap; }
  .lesson-finish-card .primary-cta { width: 100%; justify-content: center; }
  .lesson-done-card { padding: 22px 18px 18px; border-radius: 26px; }
  .lesson-done-figure img { width: 110px; height: 110px; }
  .lesson-done-bubble { left: auto; right: calc(100% - 22px); border-radius: 18px 18px 4px 18px; min-width: 0; }
  .lesson-done-stats { gap: 8px; }
  .lesson-done-stats strong { font-size: 1.2rem; }
  .target-choices { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-done, .lesson-done-card { animation: none; }
  .lesson-progress span { transition: none; }
}
.lesson-done-actions [hidden] { display: none; }

/* Zwei Modi: Lesen (Lernzettel) und Latihan (interaktive Übung) */
.lesson-page.is-baca .lesson-latihan, .lesson-page.is-latihan .lesson-read,
.lesson-page.is-baca .for-latihan, .lesson-page.is-latihan .for-baca { display: none; }
.lesson-points b { font-weight: 900; }
.lesson-finish-card .primary-cta:disabled { cursor: not-allowed; filter: grayscale(1); opacity: .55; }

.lesson-latihan-hero { margin: 4px 0 22px; text-align: center; }
.lesson-latihan-hero .eyebrow { margin: 0 0 4px; }
.lesson-latihan-hero h1 { margin: 0 0 10px; font-size: clamp(1.7rem, 5vw, 2.6rem); line-height: 1.08; }
.lesson-latihan-hero #exercise-intro { max-width: 640px; margin: 0 auto; color: var(--muted); }
.lesson-latihan-meta { display: flex; justify-content: space-between; gap: 12px; margin: 20px 0 8px; font-size: .9rem; }
.lesson-latihan-meta strong { color: var(--blue); }
.lesson-latihan-meta span { color: #b98500; font-weight: 900; }
.lesson-latihan .exercise-progress-track { height: 10px; overflow: hidden; border: 1px solid var(--line); border-radius: 999px; background: white; }
.lesson-latihan #exercise-progress-bar { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--teal); transition: width .25s ease; }
.lesson-latihan-loading, .lesson-latihan-error, #exercise-root .exercise-empty { padding: 40px 0; color: var(--muted); text-align: center; }

/* Gestaltung der Aufgaben aus exercise-runner.js, im Creme-System */
#exercise-root .exercise-level { overflow: hidden; margin: 0 0 22px; border: 1px solid var(--line); border-radius: 26px; background: var(--paper); box-shadow: var(--shadow); }
#exercise-root .exercise-level-head { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: center; padding: 20px 22px; }
#exercise-root .exercise-level-head > span { display: grid; place-items: center; min-width: 74px; min-height: 52px; border-radius: 18px; padding: 6px 10px; color: white; font-weight: 900; text-align: center; }
#exercise-root .exercise-level-head h2 { margin: 0; font-size: 1.3rem; }
#exercise-root .exercise-level-head p { margin: 3px 0 0; color: var(--muted); font-size: .92rem; }
#exercise-root .level-1 { background: #e6f8f6; } #exercise-root .level-1 > span { background: var(--teal); }
#exercise-root .level-2 { background: var(--blue-soft); } #exercise-root .level-2 > span { background: var(--blue); }
#exercise-root .level-3 { background: #fff0eb; } #exercise-root .level-3 > span { background: var(--coral); }
#exercise-root .level-plus { background: #fff6d8; } #exercise-root .level-plus > span { color: var(--ink); background: var(--yellow); }
#exercise-root .exercise-task-list { padding: 4px 22px 20px; }
#exercise-root .exercise-task { border-bottom: 1px solid var(--line); padding: 18px 0; }
#exercise-root .exercise-task:last-child { border-bottom: 0; }
#exercise-root .exercise-task label { display: grid; grid-template-columns: 32px 1fr; gap: 12px; align-items: start; font-weight: 800; }
#exercise-root .exercise-task label > span { display: grid; place-items: center; width: 30px; aspect-ratio: 1; border-radius: 10px; color: var(--blue); background: var(--blue-soft); font-weight: 900; }
#exercise-root .exercise-task input, #exercise-root .exercise-task textarea { display: block; box-sizing: border-box; width: 100%; margin: 12px 0 10px; border: 2px solid var(--line); border-radius: 14px; padding: 11px 14px; color: var(--ink); background: var(--cream); font: inherit; font-weight: 600; resize: vertical; }
#exercise-root .exercise-task input:focus, #exercise-root .exercise-task textarea:focus { border-color: var(--blue); outline: 0; box-shadow: 0 0 0 3px var(--blue-soft); }
#exercise-root .exercise-task > button { border: 0; border-radius: 14px; padding: 10px 18px; color: white; background: var(--blue); box-shadow: 0 4px 0 var(--blue-deep); font: inherit; font-weight: 900; cursor: pointer; }
#exercise-root .exercise-task > button:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--blue-deep); }
#exercise-root .exercise-task.is-resolved > button { background: #1b988d; box-shadow: 0 4px 0 #126b63; }
#exercise-root .exercise-feedback { display: grid; gap: 4px; margin-top: 12px; border-radius: 14px; padding: 12px 15px; }
#exercise-root .exercise-feedback span { font-weight: 900; }
#exercise-root .exercise-feedback small { font-size: .84rem; }
#exercise-root .exercise-feedback.is-correct { color: #126b63; background: #e6f8f6; }
#exercise-root .exercise-feedback.is-near { color: #8a6100; background: #fff6d8; }
#exercise-root .exercise-feedback.is-wrong { color: #a03a22; background: #fff0eb; }
#exercise-root .exercise-feedback.is-review { color: var(--blue-deep); background: var(--blue-soft); }
#exercise-root .cloze-bank { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 14px; }
#exercise-root .cloze-chip { border: 1px solid var(--line); border-radius: 999px; padding: 5px 10px; background: var(--cream); font-weight: 800; }
#exercise-root .cloze-chip.is-used { color: #126b63; background: #e6f8f6; text-decoration: line-through; }
#exercise-root .cloze-text { margin: 0 0 14px; font-size: 1.05rem; line-height: 2.2; }
#exercise-root .cloze-text input, #exercise-root .rektion-row input { display: inline-block; width: 8rem; margin: 0 4px; padding: 5px 8px; }
#exercise-root .rektion-row input[data-pattern] { width: min(100%, 20rem); }
#exercise-root .is-right { border-color: #1b988d !important; background: #e6f8f6 !important; }
#exercise-root .is-bad { border-color: #e2694b !important; background: #fff0eb !important; }
#exercise-root .rektion-list { display: grid; gap: 14px; margin-bottom: 12px; }
#exercise-root .rektion-row, #exercise-root .obwohl-row { display: grid; gap: 8px; border-bottom: 1px solid var(--line); padding-bottom: 14px; }
#exercise-root .rektion-row p, #exercise-root .obwohl-row p { margin: 0; font-weight: 800; line-height: 1.8; }
#exercise-root .rektion-row p span, #exercise-root .obwohl-row p span { display: inline-grid; place-items: center; width: 28px; height: 28px; margin-right: 6px; border-radius: 9px; color: var(--blue); background: var(--blue-soft); }
#exercise-root .rektion-row label, #exercise-root .obwohl-row label { display: grid; gap: 4px; color: var(--muted); font-size: .82rem; font-weight: 800; }
#exercise-root .rektion-sample { color: var(--muted); font-size: .78rem; font-weight: 700; }
#exercise-root .exercise-choice-prompt { display: grid; grid-template-columns: 32px 1fr; gap: 12px; align-items: start; }
#exercise-root .exercise-choice-prompt > span { display: grid; place-items: center; width: 30px; aspect-ratio: 1; border-radius: 10px; color: var(--blue); background: var(--blue-soft); font-weight: 900; }
#exercise-root .exercise-choice-prompt b, #exercise-root .exercise-choice-prompt small { display: block; }
#exercise-root .exercise-choice-prompt small { margin-top: 4px; color: var(--muted); font-weight: 700; }
#exercise-root .exercise-choice-options { display: grid; gap: 9px; margin: 14px 0; }
#exercise-root .exercise-choice-options .exercise-choice-option { display: grid; grid-template-columns: 20px 1fr; gap: 10px; align-items: center; margin: 0; border: 2px solid var(--line); border-radius: 14px; padding: 11px 13px; background: var(--cream); cursor: pointer; }
#exercise-root .exercise-choice-options .exercise-choice-option:hover { border-color: var(--blue); }
#exercise-root .exercise-choice-options .exercise-choice-option > input { width: 18px; height: 18px; margin: 0; accent-color: var(--blue); }
#exercise-root .exercise-choice-options .exercise-choice-option > span { display: block; width: auto; aspect-ratio: auto; border-radius: 0; color: var(--ink); background: transparent; text-align: left; }
#exercise-root .exercise-choice-options .exercise-choice-option.is-right { border-color: #1b988d; background: #e6f8f6; }
#exercise-root .exercise-choice-options .exercise-choice-option.is-bad { border-color: #e2694b; background: #fff0eb; }
#exercise-root .exercise-plus-offer { display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; margin: 0 0 22px; border: 2px solid var(--yellow); border-radius: 22px; padding: 18px 20px; background: #fff6d8; }
#exercise-root .exercise-plus-offer > span { border-radius: 999px; padding: 7px 10px; color: var(--ink); background: var(--yellow); font-size: .72rem; font-weight: 900; }
#exercise-root .exercise-plus-offer h2, #exercise-root .exercise-plus-offer p { margin: 0; }
#exercise-root .exercise-plus-offer h2 { font-size: 1.05rem; }
#exercise-root .exercise-plus-offer p { margin-top: 3px; color: var(--muted); font-size: .86rem; }
#exercise-root .exercise-plus-offer a { border-radius: 999px; padding: 9px 13px; color: white; background: var(--blue); font-size: .82rem; font-weight: 900; text-decoration: none; white-space: nowrap; }

@media (max-width: 650px) {
  #exercise-root .exercise-level-head { grid-template-columns: 1fr; padding: 16px; }
  #exercise-root .exercise-level-head > span { justify-self: start; min-height: 0; }
  #exercise-root .exercise-task-list { padding: 2px 16px 16px; }
  #exercise-root .exercise-task label { grid-template-columns: 28px 1fr; gap: 10px; }
  #exercise-root .cloze-text input, #exercise-root .rektion-row input { width: 7rem; }
  #exercise-root .exercise-plus-offer { grid-template-columns: 1fr; }
  #exercise-root .exercise-plus-offer > span { justify-self: start; }
  #exercise-root .exercise-plus-offer a { text-align: center; }
}