/* ==========================================================================
   kubshm_lms_course_menu.css
   LMS-018 / Обособленное меню страницы курса.

   ВАЖНО:
   - не зависит от /css/white-menu.css;
   - не использует его общие .main-header/.main-nav/.nav-* классы;
   - весь компонент изолирован префиксом .lms-course-menu*;
   - mobile: нижняя панель;
   - desktop: компактное выпадающее меню справа.
   ========================================================================== */

.lms-course-menu,
.lms-course-menu *{
  box-sizing: border-box;
}

.lms-course-menu{
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1200;
  width: min(calc(100% - 24px), 960px);
  margin: 0 auto;
  padding-top: 10px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

/*
 * Fixed-шапка не должна перекрывать содержимое курса.
 * Правило локально только для Resource, где Chunk стоит непосредственно перед #course.
 */
.lms-course-menu + #course{
  margin-top: 100px;
}

html[data-lms-teacher-preview="1"] .lms-course-menu,
body[data-lms-teacher-preview="1"] .lms-course-menu{
  display: none !important;
}

.lms-course-menu__bar{
  position: relative;
  z-index: 3;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px;
  border: 1px solid rgba(221, 217, 228, 0.90);
  border-radius: 18px;
  background: rgba(255,255,255,0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 24px rgba(31,20,52,0.10);
}

.lms-course-menu__brand{
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #5B00A6;
  text-decoration: none;
}

.lms-course-menu__logo{
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  object-fit: contain;
  display: block;
}

.lms-course-menu__brand-text{
  min-width: 0;
  color: #5B00A6;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.04;
}

.lms-course-menu__toggle,
.lms-course-menu__close{
  appearance: none;
  border: 0;
  background: transparent;
  color: #1f1f1f;
  font: inherit;
  cursor: pointer;
}

.lms-course-menu__toggle{
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
}

.lms-course-menu__toggle:focus-visible,
.lms-course-menu__close:focus-visible,
.lms-course-menu__item:focus-visible,
.lms-course-menu__brand:focus-visible{
  outline: 3px solid rgba(91,0,166,0.20);
  outline-offset: 2px;
}

.lms-course-menu__toggle-icon,
.lms-course-menu__toggle-icon::before,
.lms-course-menu__toggle-icon::after{
  display: block;
  width: 25px;
  height: 2px;
  border-radius: 999px;
  background: #252525;
  transition: transform .18s ease, top .18s ease, background-color .18s ease;
}

.lms-course-menu__toggle-icon{
  position: relative;
}

.lms-course-menu__toggle-icon::before,
.lms-course-menu__toggle-icon::after{
  content: "";
  position: absolute;
  left: 0;
}

.lms-course-menu__toggle-icon::before{ top: -7px; }
.lms-course-menu__toggle-icon::after{ top: 7px; }

.lms-course-menu.is-open .lms-course-menu__toggle-icon{
  background: transparent;
}

.lms-course-menu.is-open .lms-course-menu__toggle-icon::before{
  top: 0;
  transform: rotate(45deg);
}

.lms-course-menu.is-open .lms-course-menu__toggle-icon::after{
  top: 0;
  transform: rotate(-45deg);
}

.lms-course-menu__overlay{
  position: fixed;
  inset: 0;
  z-index: 1;
  background: rgba(22,18,28,0.38);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.lms-course-menu__panel{
  z-index: 2;
  overflow: hidden;
  border: 1px solid rgba(221,217,228,0.94);
  background: rgba(255,255,255,0.98);
  color: #171717;
  box-shadow: 0 24px 60px rgba(31,20,52,0.22);
}

.lms-course-menu__panel-head{
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px 8px;
}

.lms-course-menu__panel-title{
  font-size: 1.52rem;
  line-height: 1;
  font-weight: 700;
}

.lms-course-menu__close{
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  font-size: 2rem;
  line-height: 1;
  font-weight: 300;
}

.lms-course-menu__nav{
  display: grid;
  gap: 0;
  padding: 4px 14px 16px;
}

.lms-course-menu__item{
  min-width: 0;
  min-height: 58px;
  display: grid;
  grid-template-columns: 28px minmax(0,1fr) 18px;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-top: 1px solid rgba(232,228,237,0.92);
  border-radius: 0;
  color: #202027;
  text-decoration: none;
  font-size: 1rem;
  line-height: 1.28;
  font-weight: 500;
}

.lms-course-menu__item:first-child{
  border-top: 0;
}

.lms-course-menu__item:hover{
  background: rgba(245,241,250,0.82);
}

.lms-course-menu__item--contact{
  margin: 6px 0;
  border-top-color: transparent;
  border-radius: 16px;
  background: rgba(242,233,251,0.82);
  color: #5B00A6;
  font-weight: 650;
}

.lms-course-menu__item--contact + .lms-course-menu__item{
  border-top-color: rgba(232,228,237,0.92);
}

.lms-course-menu__item--contact:hover{
  background: rgba(235,219,249,0.92);
}

.lms-course-menu__item.is-placeholder,
.lms-course-menu__item[aria-disabled="true"]{
  color: #8c8793;
  cursor: default;
}

.lms-course-menu__item.is-placeholder:hover,
.lms-course-menu__item[aria-disabled="true"]:hover{
  background: transparent;
}

.lms-course-menu__item-icon{
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: currentColor;
}

.lms-course-menu__item-icon svg{
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.lms-course-menu__item-text{
  min-width: 0;
  overflow-wrap: anywhere;
}

.lms-course-menu__chevron{
  justify-self: end;
  color: #8e8998;
  font-size: 1.75rem;
  line-height: 1;
  font-weight: 300;
}

.lms-course-menu__item--contact .lms-course-menu__chevron{
  color: #731bc6;
}

body.lms-course-menu-open{
  overflow: hidden;
}

@media (max-width: 767px){
  .lms-course-menu{
    width: min(calc(100% - 20px), 560px);
    padding-top: 8px;
  }

  .lms-course-menu + #course{
    margin-top: 90px;
  }

  .lms-course-menu__bar{
    min-height: 58px;
    padding: 8px 10px 8px 12px;
    border-radius: 16px;
  }

  .lms-course-menu__logo{
    width: 32px;
    height: 32px;
  }

  .lms-course-menu__brand-text{
    font-size: 12px;
  }

  .lms-course-menu__toggle{
    width: 42px;
    height: 42px;
  }

  .lms-course-menu__panel{
    position: fixed;
    left: 10px;
    right: 10px;
    bottom: calc(10px + env(safe-area-inset-bottom));
    max-height: min(78dvh, 650px);
    overflow-y: auto;
    border-radius: 26px;
  }

  .lms-course-menu__nav{
    padding-bottom: 18px;
  }
}

@media (min-width: 768px){
  body.lms-course-menu-open{
    overflow: auto;
  }

  .lms-course-menu__overlay{
    display: none !important;
  }

  .lms-course-menu__panel{
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: min(350px, calc(100vw - 32px));
    max-height: calc(100dvh - 100px);
    overflow-y: auto;
    border-radius: 20px;
  }

  .lms-course-menu__panel-head{
    display: none;
  }

  .lms-course-menu__nav{
    padding: 12px;
  }

  .lms-course-menu__item{
    min-height: 60px;
    border-radius: 12px;
  }

  .lms-course-menu__item + .lms-course-menu__item{
    margin-top: 2px;
  }

  .lms-course-menu__item--contact{
    margin-top: 6px !important;
    margin-bottom: 6px;
  }
}

@media (prefers-reduced-motion: reduce){
  .lms-course-menu__toggle-icon,
  .lms-course-menu__toggle-icon::before,
  .lms-course-menu__toggle-icon::after{
    transition: none;
  }
}