/* Shared hierarchy for every UI locale; Korean is the target learning language. */
.story-panel .story-jp,.story-panel .story-text{font-family:system-ui,-apple-system,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;font-size:clamp(22px,3vw,26px);font-weight:600;line-height:1.8;letter-spacing:-.02em;color:#293d35;word-break:keep-all;overflow-wrap:anywhere;margin:12px 0}
.story-panel .story-translation,.story-panel .translated{font-family:system-ui,sans-serif;font-size:14px;font-weight:400;line-height:1.8;color:#666d6a;white-space:pre-line;margin:8px 0 16px}
.story-option{padding:16px 18px;line-height:1.75;min-height:60px}
.story-option [lang=ko]{font-size:19px;font-weight:600;color:#293d35}
.story-option small{font-size:13px;font-weight:400;line-height:1.7;color:#666d6a;margin-top:7px}
.lesson-scroll{display:block;overflow-y:auto;overscroll-behavior:contain}
.lesson-scroll .lesson-question{max-height:none;overflow:visible;padding:20px 22px}
.lesson-scroll .lesson-choices{overflow:visible;padding:16px 22px 28px}
.lesson-question h2,.question-passage{font-family:system-ui,-apple-system,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;font-size:22px;line-height:1.8;font-weight:600;word-break:keep-all;overflow-wrap:anywhere;letter-spacing:-.02em}
.lesson-question .instruction{font-size:16px;line-height:1.85;color:#46564e;white-space:pre-line;margin:10px 0 14px}
.answer-row{margin-bottom:14px;border-radius:12px}
.answer-option{min-height:76px;padding:18px 16px;gap:14px;align-items:flex-start}
.answer-option .jp{font-size:20px;font-weight:600;line-height:1.75;word-break:keep-all;overflow-wrap:anywhere}
.answer-option .number{padding-top:5px;font-size:12px;font-weight:400;color:#747b77}
.lesson-help,.learning-notes{margin:0 22px 12px}
.lesson-help{display:flex;flex-wrap:wrap;gap:8px 20px}
.lesson-help details[open]{flex-basis:100%}
.reading-aid summary,.answer-help summary,.learning-notes summary,.yuna-beginner-guide summary{cursor:pointer;min-height:44px;padding:10px 0;font-size:13px;font-weight:500;color:#626d66;line-height:1.8}
.reading-aid p,.answer-help p{font-size:14px;line-height:1.85;margin:8px 0 14px}
.reading-aid .reading,.reading-aid small{display:block;font-size:13px;font-weight:400;line-height:1.8;color:#707873;margin-top:5px}
.reading-aid [lang=ko]{font-size:17px;font-weight:500;color:#344c3e}
.learning-notes .learning-context{margin:0;padding:12px 0}
.explanation{font-size:16px;line-height:1.9;padding:20px;border-radius:12px}
.explanation b{font-size:14px}
.story-option:focus-visible,summary:focus-visible,.answer-option:focus-visible{outline:3px solid #557e6b;outline-offset:3px}
@media(max-width:600px){.story-panel{padding:20px;max-height:68dvh}.story-panel .story-jp{font-size:22px}.story-panel .story-translation,.story-panel .translated{font-size:14px}.lesson-scroll .lesson-question{padding:16px 18px}.lesson-scroll .lesson-choices{padding:12px 18px 24px}.lesson-help,.learning-notes{margin-left:18px;margin-right:18px}.answer-option .jp{font-size:19px}.lesson-question h2,.question-passage{font-size:21px}}