.lessons-page .navbar-custom .nav a[href='/lessons/'] { text-decoration: underline; text-underline-offset: 6px; }
.lessons-intro { max-width: 650px; margin: 28px 0; font-size: 18px; line-height: 1.6; }
.lesson-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0; }
.lesson-tags a { padding: 6px 12px; border: 1px solid #ccc; font-size: 14px; }
.lesson-tags a[aria-current] { background: #111; border-color: #111; color: #fff; }
.lesson-list { padding-bottom: 80px; }
.lessons-index :is(.news-masthead, .lesson-list) > .container { width: 100%; max-width: 780px; padding-inline: 0; }
@media (max-width: 823px) {
  .lessons-index :is(.news-masthead, .lesson-list) > .container { width: auto; margin-inline: 22px; }
}
.lesson-card { padding: 18px 0; border-bottom: 1px solid #ddd; }
.lesson-card h2 { margin: 0 0 8px; font-size: 21px; line-height: 1.3; letter-spacing: -.015em; text-transform: none; }
.lesson-card h2 a:hover { text-decoration: underline; text-underline-offset: 3px; }
.lesson-card p { max-width: 780px; margin: 0; color: #666; font-size: 14px; line-height: 1.6; }
.lessons-index .news-masthead { padding: 40px 0 16px; }
.lessons-index .news-masthead .module-title { font-size: clamp(44px, 6vw, 72px); letter-spacing: -.045em; }
.lessons-index .lessons-intro { margin: 16px 0; font-size: 15px; }
.lessons-index .lesson-tags { gap: 6px 12px; margin: 12px 0 0; align-items: center; }
.lessons-index .lesson-tags a { padding: 2px 0; border: 0; color: #777; font-size: 12px; line-height: 1.5; }
.lessons-index .lesson-tags a:hover { color: #111; text-decoration: underline; text-underline-offset: 3px; }
.lessons-index .lesson-tags a[aria-current] { background: transparent; color: #111; font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.lesson-pagination { display: flex; gap: 24px; margin-top: 32px; }
.lessons-page .news-detail { padding: 44px 0 64px; }
.lessons-page .news-detail .post-header { max-width: 780px; margin: 0 auto 28px; padding-bottom: 20px; }
.lesson-breadcrumbs { margin-bottom: 18px; font-size: 12px; line-height: 1.6; color: #777; }
.lesson-breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 4px 8px; margin: 0; padding: 0; list-style: none; }
.lesson-breadcrumbs li { min-width: 0; overflow-wrap: anywhere; }
.lesson-breadcrumbs li + li::before { content: '/'; margin-right: 8px; color: #aaa; }
.lesson-breadcrumbs a { color: #555; }
.lesson-breadcrumbs a:hover { color: #111; text-decoration: underline; text-underline-offset: 3px; }
.lessons-page .news-detail .post-title { font-size: clamp(28px, 3.5vw, 42px); line-height: 1.15; letter-spacing: -.03em; }
.lessons-page .news-detail .post-entry { font-size: 16px; line-height: 1.7; }
.lessons-page .news-detail .post-entry :is(h1, h2, h3, h4, h5, h6) { margin: 28px 0 14px; }
.lessons-page .news-detail .post-entry :is(h1, h2) { font-size: 26px; }
.lessons-page .news-detail .post-entry h3 { font-size: 22px; }
.lessons-page .news-detail .post-entry :is(h4, h5, h6) { font-size: 18px; }
.lessons-page .news-detail .post-entry p { margin-bottom: 16px; }
.lessons-page .news-detail .post-entry :is(ul, ol) { margin-block: 16px; }
.lessons-page .news-detail .post-entry li { margin-bottom: 6px; }
.lessons-page .news-detail .post-entry blockquote { margin-block: 24px; font-size: 19px; }
.lessons-page .news-detail .post > .btn { margin-top: 32px; padding-block: 16px; font-size: 15px; }
.lessons-page .news-detail .lesson-tags { gap: 6px 12px; margin: 14px 0 0; }
.lessons-page .news-detail .lesson-tags a { padding: 2px 0; border: 0; color: #777; font-size: 12px; }
.lesson-videos { max-width: 780px; margin: 0 auto; }
.lesson-player { margin: 0 0 36px; }
.lesson-player figcaption { margin-bottom: 12px; font-size: 18px; }
.lesson-player video { display: block; width: 100%; max-height: 75svh; background: #111; }
.lesson-player-stage { position: relative; overflow: hidden; border-radius: 12px; background: #101012; color: #fff; isolation: isolate; }
.lesson-player-stage video { aspect-ratio: 16 / 9; object-fit: contain; }
.lesson-player-stage button { display: inline-grid; place-items: center; width: 42px; height: 42px; padding: 0; border: 0; border-radius: 8px; background: transparent; color: #fff; font: inherit; font-size: 20px; cursor: pointer; }
.lesson-player-stage button:hover, .lesson-player-menu summary:hover { background: #ffffff26; }
.lesson-player-stage button, .lesson-player-menu summary { transition: background .15s ease, transform .15s ease; }
.lesson-player-stage button:active { transform: scale(.94); }
.lesson-player-stage .player-icon { display: block; width: 22px; height: 22px; flex-shrink: 0; pointer-events: none; }
.lesson-player-start .player-icon { width: 30px; height: 30px; }
.player-icon [data-icon='pause'], .player-icon [data-icon='muted'], .player-icon [data-icon='collapse'] { display: none; }
[data-play][data-state='playing'] [data-icon='play'], [data-mute][data-state='muted'] [data-icon='sound'], [data-fullscreen][data-state='expanded'] [data-icon='expand'] { display: none; }
[data-play][data-state='playing'] [data-icon='pause'], [data-mute][data-state='muted'] [data-icon='muted'], [data-fullscreen][data-state='expanded'] [data-icon='collapse'] { display: initial; }
.lesson-player-menu[open] summary { background: #ffffff26; }
.lesson-player-stage :focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.lesson-player-stage .lesson-player-start { position: absolute; inset: 0; margin: auto; width: 72px; height: 72px; padding-left: 4px; border: 1px solid #ffffff60; border-radius: 50%; background: #101012a6; backdrop-filter: blur(12px); font-size: 28px; }
.lesson-player-controls { position: absolute; inset: auto 0 0; padding: 36px 16px 10px; background: linear-gradient(transparent, #000d); z-index: 2; }
.lesson-player-toolbar { display: flex; align-items: center; gap: 8px; }
.lesson-player-time { font-size: 12px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.lesson-player-spacer { flex: 1; }
.lesson-player input[type=range] { accent-color: #fff; cursor: pointer; }
.lesson-player .lesson-player-seek { display: block; width: 100%; height: 4px; margin: 0 0 8px; appearance: none; border-radius: 4px; background: linear-gradient(to right, #fff var(--progress, 0%), #ffffff50 var(--progress, 0%)); }
.lesson-player .lesson-player-volume { width: 64px; margin: 0; }
.lesson-player-menu { position: relative; }
.lesson-player-menu summary { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 8px; cursor: pointer; list-style: none; font-size: 22px; }
.lesson-player-menu summary::-webkit-details-marker { display: none; }
.lesson-player-options { position: absolute; right: 0; bottom: 52px; width: 220px; padding: 16px; border: 1px solid #ffffff25; border-radius: 12px; background: #1b1b20f5; box-shadow: 0 8px 32px #0005; font-size: 13px; }
.lesson-player-options label { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-weight: 400; }
.lesson-player-options select { padding: 6px; border: 1px solid #ffffff30; border-radius: 5px; background: #2c2c32; color: #fff; }
.lesson-player-options [data-quality-status] { display: block; margin: 8px 0 16px; color: #bbb; }
.lesson-player-loading { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; z-index: 1; }
.lesson-player-spinner { width: 48px; height: 48px; border: 3px solid #ffffff40; border-top-color: #fff; border-radius: 50%; box-shadow: 0 0 20px #0003; animation: lesson-player-spin .8s linear infinite; }
.lesson-player-stage:has(.lesson-player-loading:not([hidden])) .lesson-player-start { visibility: hidden; }
@keyframes lesson-player-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .lesson-player-spinner { animation-duration: 2s; } }
.lesson-player-stage [hidden] { display: none !important; }
.lesson-player-stage:fullscreen { display: flex; align-items: center; border-radius: 0; }
.lesson-player-stage:fullscreen video { max-height: 100vh; height: 100%; }
@media (max-width: 480px) {
  .lesson-player-controls { padding: 30px 8px 6px; }
  .lesson-player-toolbar { gap: 2px; }
  .lesson-player .lesson-player-volume { display: none; }
  .lesson-player-stage .lesson-player-start { width: 56px; height: 56px; font-size: 22px; }
}