/* Compact study navigation in the approved Korean cover palette. */
.series-copy{min-width:0}.study-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:13px}
.study-actions .series-start{min-height:44px;font-size:.875rem;line-height:1.5;padding:10px 16px;max-width:100%;text-align:left}
.study-lessons-toggle{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:8px 12px;border:1px solid var(--control-border);border-radius:25px;background:var(--surface);color:var(--accent);font-size:.875rem;font-weight:700}
.study-lessons-toggle svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;flex-shrink:0}
.study-lessons-toggle:hover{background:var(--accent);border-color:var(--accent);color:#fff}.study-lessons-toggle:active{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff}
.study-lesson-count{display:grid;place-items:center;min-width:25px;height:25px;padding:0 5px;border-radius:50%;background:var(--accent);color:#fff;font-size:.8125rem}.study-lessons-toggle:hover .study-lesson-count,.study-lessons-toggle:active .study-lesson-count{background:var(--gold);color:var(--cover-navy)}
.study-dialog{padding:0;border:1px solid var(--line);border-radius:20px;width:min(610px,calc(100% - 32px));max-height:min(720px,calc(100dvh - 40px));color:var(--ink);background:var(--paper);box-shadow:0 30px 100px #04101c88}
.study-dialog[open]{display:flex;flex-direction:column}.study-dialog::backdrop{background:#04101cb8;backdrop-filter:blur(5px)}
.study-dialog-header{display:flex;align-items:center;gap:16px;padding:22px 24px;background-color:var(--cover-navy);background-image:linear-gradient(115deg,var(--cover-navy),var(--cover-navy-highlight));color:#fff;flex-shrink:0}
.study-dialog-header>img{width:68px;height:68px;border-radius:9px;border:1px solid var(--gold-tint);box-shadow:0 4px 15px #04101c60;flex-shrink:0}
.study-dialog-heading{flex:1;min-width:0}.study-dialog-eyebrow{font-size:.875rem;color:var(--gold-tint)}
.study-dialog-heading h2{font-family:var(--korean-font);font-size:1.75rem;line-height:1.4;letter-spacing:-.035em;margin:5px 0 4px;overflow-wrap:break-word}
.study-dialog-heading p{margin:0;color:var(--gold-tint);font-size:.875rem;line-height:1.6}
.study-dialog-close{display:grid;place-items:center;border:1px solid var(--gold-tint);border-radius:50%;background:transparent;color:#fff;width:44px;height:44px;font-size:1.5rem;flex-shrink:0}
.study-dialog-close:hover{background:var(--gold);border-color:var(--gold);color:var(--cover-navy)}.study-dialog-close:active{background:var(--gold-hover);border-color:var(--gold-hover);color:var(--cover-navy)}
.study-dialog-actions{padding:17px 24px 10px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;flex-shrink:0}.study-dialog-start{font-size:.875rem;min-height:44px;line-height:1.5;max-width:100%;white-space:normal}
.study-lesson-list{list-style:none;padding:0 17px 18px;margin:0;overflow-y:auto;min-height:0;overscroll-behavior:contain;scrollbar-color:var(--control-border) #eaf0f5}.study-lesson-list li+li{border-top:1px solid var(--line)}
.study-lesson{display:flex;align-items:center;gap:12px;width:100%;padding:12px 7px;min-height:72px;border:0;border-radius:9px;background:transparent;text-align:left;color:var(--ink)}
.study-lesson:hover,.study-lesson:focus-visible{background:#eaf0f5}.study-lesson:active{background:var(--line)}.study-lesson:focus-visible{outline-offset:-3px}
.study-lesson-number{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;font-size:.8125rem;font-weight:700;background:var(--accent);color:#fff;flex-shrink:0;font-variant-numeric:tabular-nums}
.study-lesson>img{width:48px;height:48px;border-radius:6px;flex-shrink:0}.study-lesson-copy{flex:1;min-width:0}
.study-lesson-copy strong{display:block;font-family:var(--korean-font);font-size:.9375rem;line-height:1.65;font-weight:800;overflow-wrap:break-word}.study-lesson-copy small{display:block;margin-top:3px;font-size:.8125rem;line-height:1.6;color:var(--muted);overflow-wrap:break-word}
.study-lesson-play{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--gold);color:var(--cover-navy);flex-shrink:0}.study-lesson-play svg{width:13px;height:13px;fill:currentColor;stroke:none}
@media(max-width:760px){.study-actions{gap:8px}.study-actions .series-start{font-size:.875rem;padding:9px 12px}.study-lessons-toggle{font-size:.875rem;padding:8px 10px}.study-dialog{width:calc(100% - 24px);max-height:calc(100dvh - 24px);border-radius:17px}.study-dialog-header{padding:19px 16px;gap:12px}.study-dialog-header>img{width:56px;height:56px}.study-dialog-heading h2{font-size:1.5rem}.study-dialog-actions{padding:15px 16px 9px}.study-lesson-list{padding:0 9px 12px}.study-lesson{gap:8px;padding:11px 6px}.study-lesson-number{width:28px;height:28px}.study-lesson>img{width:42px;height:42px}.study-lesson-play{width:26px;height:26px}}
@media(max-width:370px){.study-lesson-copy strong{font-size:.875rem}.study-dialog-header{padding:16px 12px;gap:9px}.study-dialog-header>img{width:48px;height:48px}.study-lesson{gap:7px}}
@media(prefers-reduced-motion:reduce){.study-lesson-list{scroll-behavior:auto}}