:root {
  --course-promo-h: 0px;
}

html.tw-course-promo-visible {
  --course-promo-h: 66px;
}

.course-promo {
  display: none;
  min-height: var(--course-promo-h);
  height: var(--course-promo-h);
  flex: 0 0 auto;
  position: relative;
  z-index: 140;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 22% -90%, rgba(96, 165, 250, .42), transparent 38%),
    linear-gradient(105deg, #111827 0%, #172554 52%, #312e81 100%);
  border-bottom: 1px solid rgba(255,255,255,.13);
}

html.tw-course-promo-visible .course-promo { display: block; }

.course-promo::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.055), transparent);
}

.course-promo__inner {
  width: 100%;
  height: 100%;
  margin: 0 auto;
  padding: 0 68px 0 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.course-promo__link {
  min-width: 0;
  min-height: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, auto) auto;
  align-items: center;
  justify-content: center;
  gap: 20px;
  color: inherit;
  text-decoration: none;
  text-align: center;
}

.course-promo__badge {
  padding: 5px 10px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  font-size: 11px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.course-promo__link strong {
  min-width: 0;
  font-size: 17px;
  line-height: 1.2;
  letter-spacing: -.015em;
}

.course-promo__link b {
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
}

.course-promo__link:hover b { text-decoration: underline; text-underline-offset: 4px; }

.course-promo__close {
  position: absolute;
  top: 50%;
  right: 18px;
  width: 38px;
  height: 38px;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  padding: 0 0 2px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 50%;
  background: transparent;
  color: #fff;
  cursor: pointer;
  font: 400 25px/1 Arial, sans-serif;
}

.course-promo__close:hover { background: rgba(255,255,255,.1); }
.course-promo__link:focus-visible,
.course-promo__close:focus-visible { outline: 2px solid #fff; outline-offset: -3px; }

/* Баннер остаётся в потоке и не перекрывает полотно. */
.layout { height: calc(100vh - var(--topbar-h) - var(--course-promo-h)); }
.admin-popover {
  top: calc(var(--topbar-h) + var(--course-promo-h) + 10px);
  max-height: calc(100vh - var(--topbar-h) - var(--course-promo-h) - 24px);
}
body.text-focus-mode .course-promo { display: none !important; }

@media (max-width: 760px) {
  html.tw-course-promo-visible { --course-promo-h: 82px; }
  .course-promo__inner { padding: 0; }
  .course-promo__link {
    width: 100%;
    min-height: 82px;
    padding: 12px 150px 12px 14px;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto;
    justify-content: stretch;
    align-content: center;
    gap: 4px;
    text-align: left;
  }
  .course-promo__badge {
    padding: 0;
    border: 0;
    border-radius: 0;
    font-size: 10px;
    letter-spacing: .055em;
  }
  .course-promo__link strong { font-size: 16px; line-height: 1.2; }
  .course-promo__link b {
    position: absolute;
    top: 50%;
    right: 56px;
    transform: translateY(-50%);
    font-size: 12px;
  }
  .course-promo__close { right: 10px; width: 34px; height: 34px; font-size: 23px; }
  .left-panel { top: calc(var(--topbar-h) + var(--course-promo-h) + 8px); }
  .admin-popover { top: calc(var(--topbar-h) + var(--course-promo-h) + 8px) !important; }
}

@media (max-width: 430px) {
  html.tw-course-promo-visible { --course-promo-h: 78px; }
  .course-promo__link {
    min-height: 78px;
    padding: 11px 138px 11px 12px;
  }
  .course-promo__badge { font-size: 9px; letter-spacing: .045em; }
  .course-promo__link strong { font-size: 14px; }
  .course-promo__link b { right: 48px; font-size: 10.5px; }
  .course-promo__close { right: 8px; width: 30px; height: 30px; font-size: 21px; }
}

@media (max-width: 350px) {
  .course-promo__link { padding-right: 124px; }
  .course-promo__link b { right: 44px; font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .course-promo__close { transition: none; }
}