/* ==========================================================================
   PAGE / lesson — צפייה בשיעור (Tutor LMS single lesson, custom player)
   No Figma frame exists for this screen. Built from the course page's own
   language (pages/_course.css, components/_course-lms.css, the dashboard
   progress bar):
     - Fredoka everywhere, Manrope 700 for numbers (time, %), as in the dashboard
     - navy #000080 = structure / text, pink #CB6DA7 = the main action,
       magenta #C22DAF = "you are here", mint = done
     - the one loud element: the video frame — the course hero's pink
       #E89DC4 border + pink drop shadow, on a 32px-rounded 16:9 stage
   Markup: assets/js/pages/lesson.js + assets/js/components/lesson-player.js
   ========================================================================== */

/* .main-content clips sideways with overflow-x:hidden, which turns it into a
   scroll container and breaks position:sticky for the outline. `clip`
   clips the same way without creating one. */
.main-content.lesson-page {
  overflow-x: clip;
}

.lesson-page {
  padding-top: 40px;
  --lesson-navy: var(--color-primary-navy);
  --lesson-ink: var(--color-text-slate);
  --lesson-pink: var(--color-pink-accent);
  --lesson-magenta: var(--color-magenta-accent);
  --lesson-pink-soft: var(--color-magenta-soft-bg);
  --lesson-frame: #E89DC4;
  --lesson-mint-bg: var(--color-mint-bg);
  --lesson-mint-ink: var(--color-mint-text);
  --lesson-line: rgba(24, 59, 81, 0.16);
  --lesson-aside-w: 400px;
  --lesson-sticky-top: calc(var(--header-height) + 24px);
}

.lesson-app {
  max-width: 1640px;
  margin: 0 auto;
  padding: 0 32px;
  box-sizing: border-box;
}

/* RTL grid: the first column is on the right → the outline sits at the
   reading start, the player takes the rest. */
.lesson-layout {
  display: grid;
  grid-template-columns: var(--lesson-aside-w) minmax(0, 1fr);
  grid-template-areas: "aside main";
  gap: 40px;
  align-items: start;
}
.lesson-main { grid-area: main; min-width: 0; transition: opacity 0.2s ease; }
.lesson-main.is-loading { opacity: 0.45; }
.lesson-aside { grid-area: aside; position: sticky; top: var(--lesson-sticky-top); }

/* --- Breadcrumbs + head ------------------------------------------------ */
.lesson-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-family: var(--font-main);
  font-size: 18px;
  line-height: 1.4;
  color: var(--lesson-navy);
}
.lesson-crumbs a { color: inherit; text-decoration: none; }
.lesson-crumbs a:hover { text-decoration: underline; }
.lesson-crumbs [aria-current] { color: var(--lesson-ink); opacity: 0.75; }
.lesson-crumbs__sep { opacity: 0.5; }

.lesson-head { margin-bottom: 28px; }
.lesson-head__topic {
  margin: 0 0 6px;
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 20px;
  line-height: 26px;
  color: var(--lesson-magenta);
}
.lesson-head__title {
  margin: 0;
  max-width: 28ch;
  font-family: var(--font-main);
  font-weight: 400;
  font-size: 48px;
  line-height: 1.12;
  color: var(--lesson-navy);
}
.lesson-head__title:focus { outline: none; }
.lesson-head__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  margin: 14px 0 0;
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 18px;
  line-height: 24px;
  color: var(--lesson-ink);
}

.lesson-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  border-radius: 9999px;
  font-size: 15px;
  line-height: 20px;
  white-space: nowrap;
}
.lesson-tag--free { background: #BEE1DA; color: var(--lesson-ink); }
.lesson-tag--done { background: var(--lesson-mint-bg); color: var(--lesson-mint-ink); }

/* --- Stage (the signature frame) -------------------------------------- */
.lesson-stage {
  position: relative;
  aspect-ratio: 16 / 9;
  border: 4px solid var(--lesson-frame);
  border-radius: 32px;
  overflow: hidden;
  background: var(--color-tab-active-bg);
  box-shadow: 0 18px 30px -10px rgba(86, 41, 80, 0.5);
  isolation: isolate;
}
.lesson-stage--locked,
.lesson-stage--html { aspect-ratio: auto; }
.lesson-stage--html { background: #000; }
.lp-html { width: 100%; }
.lp-html iframe,
.lp-html video { display: block; width: 100%; aspect-ratio: 16 / 9; height: auto; border: 0; }

.lp-embed {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Facade — poster + the course hero's pink play button */
.lp-facade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  color: #FFFFFF;
}
.lp-facade__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.lp-facade__poster--empty {
  background:
    radial-gradient(circle at 78% 22%, rgba(232, 157, 196, 0.55), transparent 55%),
    radial-gradient(circle at 18% 85%, rgba(161, 206, 225, 0.45), transparent 50%),
    var(--color-tab-active-bg);
}
.lp-facade__shade { position: absolute; inset: 0; background: rgba(18, 33, 61, 0.28); }
.lp-facade__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.lp-facade__play {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  background: var(--lesson-pink);
  box-shadow: 0 18px 30px -10px rgba(194, 45, 175, 0.667);
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.lp-facade__play svg { margin-left: 4px; } /* optical centre of the triangle */
.lp-facade__caption {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 22px;
  line-height: 28px;
  text-shadow: 0 1px 12px rgba(0, 0, 40, 0.45);
}
.lp-facade__time {
  padding: 2px 12px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--lesson-navy);
  font-size: 16px;
  line-height: 24px;
  text-shadow: none;
}
.lp-facade:hover .lp-facade__play { transform: scale(1.07); background: var(--lesson-magenta); }
.lp-facade:hover .lp-facade__poster { transform: scale(1.02); }
.lp-facade:focus-visible { outline: none; }
.lp-facade:focus-visible .lp-facade__play { outline: 3px solid #FFFFFF; outline-offset: 5px; }

/* --- Custom player (self-hosted file) --------------------------------- */
.lp {
  position: absolute;
  inset: 0;
  background: #000;
  font-family: var(--font-main);
  color: #FFFFFF;
}
.lp:focus { outline: none; }
.lp:focus-visible { box-shadow: inset 0 0 0 3px #FFFFFF; }
.lp__video { width: 100%; height: 100%; display: block; object-fit: contain; background: #000; }
.lp.is-idle { cursor: none; }

.lp__center {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 84px;
  height: 84px;
  margin: -42px 0 0 -42px;
  border: 0;
  border-radius: 50%;
  background: var(--lesson-pink);
  box-shadow: 0 18px 30px -10px rgba(194, 45, 175, 0.667);
  cursor: pointer;
  opacity: 0;
  transform: scale(0.85);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.lp__center svg { margin-left: 4px; }
.lp.is-paused .lp__center { opacity: 1; transform: none; pointer-events: auto; }
.lp__center:hover { background: var(--lesson-magenta); }

.lp__spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 52px;
  height: 52px;
  margin: -26px 0 0 -26px;
  border: 4px solid rgba(255, 255, 255, 0.25);
  border-top-color: var(--lesson-frame);
  border-radius: 50%;
  animation: lp-spin 0.8s linear infinite;
}
.lp__spinner[hidden] { display: none; }
@keyframes lp-spin { to { transform: rotate(360deg); } }

.lp__error {
  position: absolute;
  inset: auto 24px 50% 24px;
  margin: 0;
  padding: 14px 20px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--lesson-navy);
  text-align: center;
  direction: rtl;
  font-size: 18px;
}
.lp__error[hidden] { display: none; }
.lp.has-error .lp__center,
.lp.has-error .lp__bar { display: none; }

.lp__bar {
  position: absolute;
  inset: auto 0 0 0;
  padding: 48px 20px 14px;
  background: linear-gradient(to top, rgba(10, 16, 48, 0.82), rgba(10, 16, 48, 0));
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.lp.is-idle .lp__bar { opacity: 0; transform: translateY(8px); pointer-events: none; }

.lp__row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.lp__group { display: flex; align-items: center; gap: 4px; }

.lp__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #FFFFFF;
  cursor: pointer;
  transition: background-color 0.15s ease;
}
.lp__btn:hover { background: rgba(255, 255, 255, 0.16); }
.lp__btn:focus-visible,
.lp__center:focus-visible,
.lp__menu-item:focus-visible { outline: 2px solid #FFFFFF; outline-offset: 2px; }
.lp__btn--speed {
  width: auto;
  min-width: 52px;
  padding: 0 10px;
  border-radius: 9999px;
  font-family: var(--font-manrope);
  font-weight: 700;
  font-size: 15px;
}

.lp__time {
  margin-left: 8px;
  font-family: var(--font-manrope);
  font-weight: 700;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.lp__time-sep { margin: 0 6px; opacity: 0.6; }

/* Ranges: one style for seek + volume. --pct = filled part. */
.lp__range {
  --pct: 0%;
  --buffered: 0%;
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 18px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.lp__range::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 6px;
  background:
    linear-gradient(to right, var(--lesson-pink) var(--pct), transparent var(--pct)),
    linear-gradient(to right, rgba(255, 255, 255, 0.5) var(--buffered), rgba(255, 255, 255, 0.25) var(--buffered));
}
.lp__range::-moz-range-track {
  height: 6px;
  border-radius: 6px;
  background:
    linear-gradient(to right, var(--lesson-pink) var(--pct), transparent var(--pct)),
    linear-gradient(to right, rgba(255, 255, 255, 0.5) var(--buffered), rgba(255, 255, 255, 0.25) var(--buffered));
}
.lp__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -5px;
  border: 3px solid var(--lesson-pink);
  border-radius: 50%;
  background: #FFFFFF;
  transition: transform 0.15s ease;
}
.lp__range::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 3px solid var(--lesson-pink);
  border-radius: 50%;
  background: #FFFFFF;
}
.lp__range:hover::-webkit-slider-thumb,
.lp__range:focus-visible::-webkit-slider-thumb { transform: scale(1.2); }
.lp__range:focus-visible { outline: 2px solid #FFFFFF; outline-offset: 2px; border-radius: 6px; }
.lp__seek-wrap { margin-bottom: 6px; }

.lp__volume { display: flex; align-items: center; }
.lp__vol { width: 0; opacity: 0; transition: width 0.2s ease, opacity 0.2s ease; }
.lp__volume:hover .lp__vol,
.lp__volume:focus-within .lp__vol { width: 84px; opacity: 1; margin-left: 6px; }

.lp__speed { position: relative; }
.lp__menu {
  position: absolute;
  right: 0;
  bottom: calc(100% + 10px);
  display: flex;
  flex-direction: column;
  min-width: 96px;
  padding: 6px;
  border-radius: 16px;
  background: #FFFFFF;
  box-shadow: 0 12px 30px rgba(10, 16, 48, 0.35);
}
.lp__menu[hidden] { display: none; }
.lp__menu-item {
  padding: 8px 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--lesson-navy);
  font-family: var(--font-manrope);
  font-weight: 700;
  font-size: 15px;
  text-align: center;
  cursor: pointer;
}
.lp__menu-item:hover { background: rgba(0, 0, 128, 0.08); }
.lp__menu-item[aria-checked="true"] { background: var(--lesson-pink-soft); color: var(--lesson-magenta); }
.lp__menu-item:focus-visible { outline-color: var(--lesson-navy); }

.lp.is-fullscreen { border-radius: 0; }

/* End card — over the stage when the video ends */
.lesson-endcard {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(18, 33, 61, 0.78);
  backdrop-filter: blur(3px);
  animation: lesson-fade 0.3s ease;
}
.lesson-endcard__box { max-width: 520px; text-align: center; color: #FFFFFF; font-family: var(--font-main); }
.lesson-endcard__eyebrow { margin: 0 0 8px; font-weight: 500; font-size: 20px; color: var(--lesson-frame); }
.lesson-endcard__next { margin: 0 0 22px; font-size: 24px; line-height: 1.3; }
.lesson-endcard__next strong { display: block; margin-top: 4px; font-weight: 500; font-size: 28px; }
.lesson-endcard__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
@keyframes lesson-fade { from { opacity: 0; } }

/* --- Locked panel ------------------------------------------------------ */
.lesson-locked {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 72px 32px 64px;
  background: var(--lesson-pink-soft);
  text-align: center;
  font-family: var(--font-main);
  overflow: hidden;
}
.lesson-locked::before {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  left: -60px;
  bottom: -70px;
  background: url('../../images/decorations/Flowers26.png') center / contain no-repeat;
  opacity: 0.35;
  transform: rotate(18deg);
  pointer-events: none;
}
.lesson-locked > * { position: relative; }
.lesson-locked__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 112px;
  height: 112px;
  margin-bottom: 6px;
  border: 2px dashed var(--lesson-frame);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
}
.lesson-locked__title { margin: 0; font-weight: 500; font-size: 34px; line-height: 1.2; color: var(--lesson-navy); }
.lesson-locked__text { margin: 0; max-width: 46ch; font-size: 20px; line-height: 1.5; color: var(--lesson-ink); }
.lesson-locked__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 10px; }
.lesson-locked__note { margin: 0; font-size: 17px; color: var(--lesson-navy); }

/* --- Buttons (lesson scope; same shape as the course hero buttons) ---- */
.lesson-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 50px;
  padding: 0 28px;
  box-sizing: border-box;
  border: 1px solid transparent;
  border-radius: 9999px;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 19px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.lesson-btn--primary { background: var(--lesson-pink); color: #FFFFFF; }
.lesson-btn--primary:hover { background: var(--lesson-magenta); }
.lesson-btn--navy { background: var(--lesson-navy); color: #FFFFFF; }
.lesson-btn--navy:hover { background: #1A1A9E; }
.lesson-btn--ghost { border-color: rgba(24, 59, 81, 0.3); background: transparent; color: var(--lesson-ink); font-weight: 500; }
.lesson-btn--ghost:hover { background: rgba(24, 59, 81, 0.05); }
.lesson-btn--light { background: #FFFFFF; color: var(--lesson-navy); }
.lesson-btn--light:hover { background: var(--lesson-pink-soft); }
.lesson-btn--sm { height: 42px; padding: 0 20px; font-size: 17px; }
.lesson-btn--block { width: 100%; }
.lesson-btn.is-disabled,
.lesson-btn:disabled { background: #B9B9C8; border-color: transparent; color: #FFFFFF; cursor: not-allowed; }
.lesson-btn--ghost.is-disabled,
.lesson-btn--ghost:disabled { background: transparent; border-color: rgba(24, 59, 81, 0.15); color: rgba(24, 59, 81, 0.4); }
.lesson-btn[aria-busy="true"] { cursor: progress; opacity: 0.75; }
.lesson-btn:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: 3px; }
.lesson-endcard .lesson-btn:focus-visible { outline-color: #FFFFFF; }

/* --- Actions row ------------------------------------------------------- */
.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 28px 0 0;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--lesson-line);
}
.lesson-actions__status { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.lesson-actions__nav { display: flex; gap: 12px; margin-inline-start: auto; }

.lesson-done {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 50px;
  padding: 0 24px;
  border: 1px solid var(--color-mint-border);
  border-radius: 9999px;
  background: var(--lesson-mint-bg);
  color: var(--lesson-mint-ink);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 19px;
}
.lesson-done:focus { outline: none; }
.lesson-error { margin: 0; color: #B3261E; font-family: var(--font-main); font-size: 16px; }

.lesson-actions__status:has(.lesson-preview-note) { flex: 1 1 520px; }
.lesson-preview-note {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  padding: 12px 12px 12px 12px;
  padding-inline-start: 22px;
  border-radius: 20px;
  background: var(--lesson-pink-soft);
  font-family: var(--font-main);
}
.lesson-preview-note p { margin: 0; flex: 1 1 260px; font-size: 18px; line-height: 1.45; color: var(--lesson-navy); }

/* --- About / files ----------------------------------------------------- */
.lesson-panel { margin-top: 32px; }
.lesson-panel__title {
  margin: 0 0 18px;
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 28px;
  line-height: 1.2;
  color: var(--lesson-navy);
}

.lesson-tabs { display: flex; gap: 10px; margin-bottom: 20px; }
.lesson-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border: 1px solid rgba(0, 0, 128, 0.2);
  border-radius: 9999px;
  background: #FFFFFF;
  color: var(--lesson-navy);
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 18px;
  cursor: pointer;
}
.lesson-tab[aria-selected="true"] { border-color: var(--color-tab-active-bg); background: var(--color-tab-active-bg); color: #FFFFFF; }
.lesson-tab:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: 3px; }
.lesson-tab__count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  border-radius: 9999px;
  background: var(--lesson-pink-soft);
  color: var(--lesson-magenta);
  font-family: var(--font-manrope);
  font-weight: 700;
  font-size: 13px;
}
.lesson-tabpanel:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: 6px; border-radius: 8px; }

/* Lesson body (author content from Tutor's editor) */
.lesson-content {
  max-width: 72ch;
  font-family: var(--font-main);
  font-size: 20px;
  line-height: 1.65;
  color: var(--lesson-ink);
}
.lesson-content > *:first-child { margin-top: 0; }
.lesson-content > *:last-child { margin-bottom: 0; }
.lesson-content p,
.lesson-content ul,
.lesson-content ol { margin: 0 0 1em; }
.lesson-content ul,
.lesson-content ol { padding-inline-start: 1.3em; }
.lesson-content li { margin-bottom: 0.35em; }
.lesson-content h2,
.lesson-content h3,
.lesson-content h4 { margin: 1.4em 0 0.5em; font-weight: 500; line-height: 1.25; color: var(--lesson-navy); }
.lesson-content h2 { font-size: 28px; }
.lesson-content h3 { font-size: 24px; }
.lesson-content h4 { font-size: 21px; }
.lesson-content a { color: var(--lesson-magenta); font-weight: 500; }
.lesson-content strong { font-weight: 600; color: var(--lesson-navy); }
.lesson-content img,
.lesson-content video,
.lesson-content iframe { max-width: 100%; height: auto; border-radius: 20px; }
.lesson-content blockquote {
  margin: 1.4em 0;
  padding: 18px 24px;
  border-inline-start: 4px solid var(--lesson-frame);
  border-radius: 16px 0 0 16px; /* RTL */
  background: rgba(244, 217, 232, 0.45);
  color: var(--lesson-navy);
}
.lesson-content table { width: 100%; border-collapse: collapse; font-size: 17px; }
.lesson-content th,
.lesson-content td { padding: 10px 12px; border: 1px solid var(--color-table-border); text-align: start; }
.lesson-content th { background: var(--color-table-header-bg); color: var(--lesson-navy); font-weight: 500; }

.lesson-files {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.lesson-file {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid rgba(196, 197, 217, 0.45);
  border-radius: 20px;
  background: #FFFFFF;
  color: var(--lesson-navy);
  text-decoration: none;
  font-family: var(--font-main);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.lesson-file:hover { border-color: var(--lesson-frame); background: #FFFBFD; }
.lesson-file:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: 3px; }
.lesson-file__icon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--color-icon-wave-bg);
  color: var(--lesson-navy);
}
.lesson-file__ext {
  position: absolute;
  bottom: 6px;
  padding: 0 4px;
  border-radius: 4px;
  background: var(--lesson-magenta);
  color: #FFFFFF;
  font-family: var(--font-manrope);
  font-weight: 700;
  font-size: 9px;
  line-height: 13px;
}
.lesson-file__body { display: flex; flex-direction: column; gap: 2px; min-width: 0; flex: 1 1 auto; }
.lesson-file__name { font-weight: 500; font-size: 18px; line-height: 1.3; overflow-wrap: anywhere; }
.lesson-file__size { font-size: 15px; color: var(--lesson-ink); opacity: 0.75; }
.lesson-file__dl { display: flex; color: var(--lesson-pink); }

/* --- Aside ------------------------------------------------------------- */
.lesson-aside__card {
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - var(--lesson-sticky-top) - 24px);
  border: 1px solid rgba(196, 197, 217, 0.3);
  border-radius: 32px;
  background: #FFFFFF;
  box-shadow: 0 40px 60px -10px rgba(13, 28, 47, 0.06);
  overflow: hidden;
}
.lesson-aside__head {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px 28px 22px;
  border-bottom: 1px solid var(--lesson-line);
}
.lesson-aside__course {
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 24px;
  line-height: 1.25;
  color: var(--lesson-navy);
  text-decoration: none;
}
.lesson-aside__course:hover { text-decoration: underline; }
.lesson-aside__course:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: 3px; border-radius: 4px; }

/* Progress — same bar as the personal-area dashboard */
.lesson-progress { display: flex; flex-direction: column; gap: 8px; }
.lesson-progress__labels { display: flex; align-items: center; justify-content: space-between; }
.lesson-progress__label { font-family: var(--font-main); font-weight: 500; font-size: 18px; color: var(--lesson-navy); }
.lesson-progress__pct { font-family: var(--font-manrope); font-weight: 700; font-size: 17px; color: var(--lesson-navy); }
.lesson-progress__track { height: 10px; border-radius: 10px; background: rgba(0, 0, 128, 0.145); overflow: hidden; }
.lesson-progress__fill { display: block; height: 100%; border-radius: 10px; background: var(--lesson-navy); transition: width 0.5s ease; }
.lesson-progress__count { margin: 0; font-family: var(--font-main); font-size: 15px; color: var(--lesson-ink); opacity: 0.8; }

.lesson-finish--done {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  padding: 12px 16px;
  border-radius: 16px;
  background: var(--lesson-mint-bg);
  color: var(--lesson-mint-ink);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 18px;
}
.lesson-finish--done a { margin-inline-start: auto; color: var(--lesson-navy); font-weight: 500; }

/* Mobile-only outline toggle */
.lesson-aside__toggle { display: none; }

.lesson-outline {
  flex: 1 1 auto;
  min-height: 0;
  padding: 14px 16px 20px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 0, 128, 0.2) transparent;
}

/* Topics — the course page's curriculum module, compact */
.lesson-topic { border-radius: 20px; }
.lesson-topic + .lesson-topic { margin-top: 6px; }
.lesson-topic__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border-radius: 16px;
  list-style: none;
  cursor: pointer;
}
.lesson-topic__summary::-webkit-details-marker { display: none; }
.lesson-topic__summary:hover { background: rgba(0, 0, 128, 0.04); }
.lesson-topic__summary:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: -2px; }
.lesson-topic__badge {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: rgba(0, 0, 128, 0.18);
  color: var(--lesson-navy);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 17px;
}
.lesson-topic:nth-of-type(3n + 2) .lesson-topic__badge { background: #BEE1DA; color: #4F8278; }
.lesson-topic:nth-of-type(3n + 3) .lesson-topic__badge { background: rgba(247, 192, 255, 0.55); color: var(--lesson-magenta); }
.lesson-topic__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; flex: 1 1 auto; }
.lesson-topic__title { font-family: var(--font-main); font-weight: 500; font-size: 19px; line-height: 1.25; color: var(--lesson-navy); }
.lesson-topic__meta { font-family: var(--font-main); font-size: 15px; color: var(--lesson-ink); opacity: 0.75; }
.lesson-topic__chevron { flex: 0 0 auto; color: var(--lesson-navy); transition: transform 0.2s ease; }
.lesson-topic[open] .lesson-topic__chevron { transform: rotate(180deg); }

.lesson-topic__items {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 4px 0 10px;
  padding: 0 0 0 0;
  padding-inline-start: 30px;
  list-style: none;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-inline-start: 2px solid rgba(0, 0, 128, 0.18);
  border-radius: 14px 0 0 14px; /* RTL: the line is on the right */
  font-family: var(--font-main);
  font-size: 17px;
  line-height: 1.3;
  color: var(--lesson-ink);
  text-decoration: none;
  transition: background-color 0.15s ease;
}
a.lesson-item:hover { background: rgba(0, 0, 128, 0.04); }
a.lesson-item:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: -2px; }
.lesson-item__status {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1.5px solid rgba(0, 0, 128, 0.25);
  color: var(--lesson-navy);
}
.lesson-item__status svg { margin-inline-start: 0; }
.lesson-item--lesson .lesson-item__status svg { margin-left: 2px; } /* optical centre of the play triangle */
.lesson-item__title { flex: 1 1 auto; min-width: 0; }
.lesson-item__time {
  flex: 0 0 auto;
  font-family: var(--font-manrope);
  font-weight: 700;
  font-size: 13px;
  color: var(--lesson-ink);
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
}
.lesson-item__free {
  flex: 0 0 auto;
  padding: 1px 8px;
  border-radius: 9999px;
  background: #BEE1DA;
  color: var(--lesson-ink);
  font-size: 13px;
}

.lesson-item.is-complete .lesson-item__status { border-color: transparent; background: var(--lesson-mint-bg); color: var(--lesson-mint-ink); }
.lesson-item.is-locked { color: rgba(24, 59, 81, 0.5); }
.lesson-item.is-locked .lesson-item__status { border-style: dashed; color: rgba(24, 59, 81, 0.5); }
.lesson-item.is-current {
  border-inline-start-color: var(--lesson-magenta);
  background: var(--lesson-pink-soft);
  color: var(--lesson-navy);
  font-weight: 500;
}
.lesson-item.is-current .lesson-item__status { border-color: transparent; background: var(--lesson-pink); color: #FFFFFF; }
.lesson-item.is-current.is-complete .lesson-item__status { background: var(--lesson-mint-ink); }

/* --- Skeleton (before the module runs) / noscript --------------------- */
.lesson-skeleton { display: grid; grid-template-columns: var(--lesson-aside-w) minmax(0, 1fr); grid-template-areas: "aside main"; gap: 40px; }
.lesson-skeleton__main { grid-area: main; display: flex; flex-direction: column; gap: 14px; }
.lesson-skeleton__line,
.lesson-skeleton__stage,
.lesson-skeleton__aside { display: block; border-radius: 16px; background: rgba(0, 0, 128, 0.06); animation: lesson-pulse 1.4s ease-in-out infinite; }
.lesson-skeleton__line { height: 22px; width: 60%; }
.lesson-skeleton__line--short { width: 30%; }
.lesson-skeleton__stage { aspect-ratio: 16 / 9; border-radius: 32px; margin-top: 12px; }
.lesson-skeleton__aside { grid-area: aside; height: 520px; border-radius: 32px; }
@keyframes lesson-pulse { 50% { opacity: 0.5; } }
.lesson-noscript { font-family: var(--font-main); font-size: 20px; color: var(--lesson-navy); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1300px) {
  .lesson-page { --lesson-aside-w: 340px; }
  .lesson-layout { gap: 28px; }
  .lesson-head__title { font-size: 40px; }
}

@media (max-width: 1023px) {
  .lesson-app { padding: 0 20px; }
  .lesson-layout,
  .lesson-skeleton { grid-template-columns: minmax(0, 1fr); grid-template-areas: "main" "aside"; }
  .lesson-skeleton__aside { display: none; }
  .lesson-aside { position: static; }
  .lesson-aside__card { max-height: none; }
  .lesson-aside__head { padding: 22px; }

  .lesson-aside__toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 18px 22px;
    border: 0;
    border-bottom: 1px solid var(--lesson-line);
    background: transparent;
    color: var(--lesson-navy);
    font-family: var(--font-main);
    font-weight: 500;
    font-size: 20px;
    cursor: pointer;
  }
  .lesson-aside__toggle-count { margin-inline-start: auto; font-size: 16px; font-weight: 400; color: var(--lesson-ink); }
  .lesson-aside__toggle[aria-expanded="true"] .lesson-topic__chevron { transform: rotate(180deg); }
  .lesson-aside__toggle:focus-visible { outline: 2px solid var(--lesson-navy); outline-offset: -3px; }
  .lesson-outline { display: none; max-height: 70vh; }
  .lesson-outline.is-expanded { display: block; }
}

@media (max-width: 767px) {
  .lesson-page { padding-top: 16px; }
  .lesson-app { padding: 0 14px; }
  .lesson-crumbs { font-size: 15px; margin-bottom: 14px; }
  .lesson-head { margin-bottom: 20px; }
  .lesson-head__topic { font-size: 17px; }
  .lesson-head__title { font-size: 30px; line-height: 1.18; }
  .lesson-head__meta { font-size: 16px; gap: 8px 16px; }

  .lesson-stage { border-width: 3px; border-radius: 20px; box-shadow: 0 12px 22px -10px rgba(86, 41, 80, 0.5); }
  .lp-facade__center { gap: 10px; }
  .lp-facade__play { width: 64px; height: 64px; }
  .lp-facade__caption { font-size: 16px; }
  .lp-facade__caption > span:first-child { display: none; } /* small stage: the play button says it; keep the duration */
  .lp__center { width: 64px; height: 64px; margin: -32px 0 0 -32px; }
  .lp__bar { padding: 36px 10px 8px; }
  .lp__btn { width: 38px; height: 38px; }
  .lp__btn--skip,
  .lp__vol { display: none; }
  .lp__time { font-size: 13px; margin-left: 4px; }

  .lesson-locked { padding: 44px 20px 40px; }
  .lesson-locked__icon { width: 88px; height: 88px; }
  .lesson-locked__icon svg { width: 44px; height: auto; }
  .lesson-locked__title { font-size: 26px; }
  .lesson-locked__text { font-size: 17px; }
  .lesson-locked__actions { flex-direction: column; align-self: stretch; }

  .lesson-endcard__next { font-size: 18px; }
  .lesson-endcard__next strong { font-size: 20px; }

  .lesson-actions { flex-direction: column; align-items: stretch; }
  .lesson-actions__status,
  .lesson-actions__status:has(.lesson-preview-note) { flex: none; } /* column axis: no 520px basis as height */
  .lesson-preview-note { padding: 16px 18px; }
  .lesson-preview-note .lesson-btn { width: 100%; }
  .lesson-actions__status .lesson-btn,
  .lesson-done { width: 100%; justify-content: center; }
  .lesson-actions__nav { margin: 0; }
  .lesson-actions__nav .lesson-btn { flex: 1 1 0; }
  .lesson-btn { font-size: 17px; padding: 0 20px; }

  .lesson-panel__title { font-size: 24px; }
  .lesson-tabs { overflow-x: auto; }
  .lesson-tab { flex: 0 0 auto; font-size: 16px; padding: 0 18px; }
  .lesson-content { font-size: 18px; }
  .lesson-files { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-page *,
  .lesson-page *::before,
  .lesson-page *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}