/* Курс LibreOffice Calc: оглавление | шаги урока + Нейрошка | лист Calc. */

.calc-course {
  --cc-surface: rgba(255, 255, 255, 0.035);
  --cc-surface-2: rgba(255, 255, 255, 0.06);
  --cc-border: rgba(255, 255, 255, 0.09);
  --cc-text: #eef1f4;
  --cc-muted: rgba(238, 241, 244, 0.62);
  --cc-accent: #05b87d;
  --cc-accent-soft: rgba(5, 184, 125, 0.14);
  --cc-calc: #18a303;
  --cc-warn: #f5b041;
  --cc-bad: #ff6b6b;
  --cc-tip: #7aa7ff;
  --cc-radius: 12px;
  --cc-scrollbar-size: 9px;
  --cc-scrollbar-track: rgba(15, 23, 42, 0.42);
  --cc-scrollbar-thumb: rgba(52, 211, 153, 0.34);
  --cc-scrollbar-thumb-hover: rgba(52, 211, 153, 0.58);
  --cc-scrollbar-thumb-active: rgba(16, 185, 129, 0.78);
  --calc-course-sheet-w: 52vw;
  --calc-course-toc-w: 290px;

  display: grid;
  grid-template-columns: var(--calc-course-toc-w) minmax(380px, 1fr) 8px var(--calc-course-sheet-w);
  height: calc(100dvh - var(--calc-course-header-h, 76px));
  min-height: 520px;
  color: var(--cc-text);
  font-family: var(--font-body);
  position: relative;
  z-index: 1;
  transition: grid-template-columns 0.22s ease;
}

[data-theme="light"] .calc-course {
  --cc-surface: rgba(255, 255, 255, 0.85);
  --cc-surface-2: #ffffff;
  --cc-border: rgba(20, 30, 40, 0.1);
  --cc-text: #1d1d1f;
  --cc-muted: rgba(29, 29, 31, 0.6);
  --cc-accent-soft: rgba(5, 184, 125, 0.1);
  --cc-scrollbar-track: rgba(226, 232, 240, 0.92);
  --cc-scrollbar-thumb: rgba(5, 150, 105, 0.28);
  --cc-scrollbar-thumb-hover: rgba(5, 150, 105, 0.48);
  --cc-scrollbar-thumb-active: rgba(4, 120, 87, 0.68);
}

/* Розовая палитра: акцент и текст из theme-pink.css (--white там — цвет текста и в светлой теме). */
[data-palette="pink"] .calc-course {
  --cc-accent: var(--accent);
  --cc-accent-soft: var(--accent-soft);
  --cc-border: var(--accent-soft-strong);
  --cc-text: var(--white);
  --cc-muted: var(--text-muted);
  --cc-scrollbar-thumb: var(--accent-glow);
  --cc-scrollbar-thumb-hover: var(--accent-border-strong);
  --cc-scrollbar-thumb-active: var(--accent-strong);
}

/* Скроллбары premium — как в заданиях /ege-{n}/ (hf_premium_chrome.css). */
.calc-course-toc,
.calc-course-lesson,
.calc-course-ai__feed {
  scrollbar-width: thin;
  scrollbar-color: var(--cc-scrollbar-thumb) var(--cc-scrollbar-track);
}

.calc-course-toc::-webkit-scrollbar,
.calc-course-lesson::-webkit-scrollbar,
.calc-course-ai__feed::-webkit-scrollbar {
  width: var(--cc-scrollbar-size);
  height: var(--cc-scrollbar-size);
}

.calc-course-toc::-webkit-scrollbar-track,
.calc-course-lesson::-webkit-scrollbar-track,
.calc-course-ai__feed::-webkit-scrollbar-track {
  background: var(--cc-scrollbar-track);
  border-radius: 999px;
  margin: 3px;
}

.calc-course-toc::-webkit-scrollbar-thumb,
.calc-course-lesson::-webkit-scrollbar-thumb,
.calc-course-ai__feed::-webkit-scrollbar-thumb {
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
  background-color: var(--cc-scrollbar-thumb);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  transition: background-color 0.18s ease, box-shadow 0.18s ease;
}

.calc-course-toc::-webkit-scrollbar-thumb:hover,
.calc-course-lesson::-webkit-scrollbar-thumb:hover,
.calc-course-ai__feed::-webkit-scrollbar-thumb:hover {
  background-color: var(--cc-scrollbar-thumb-hover);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.1),
    0 0 10px rgba(52, 211, 153, 0.18);
}

.calc-course-toc::-webkit-scrollbar-thumb:active,
.calc-course-lesson::-webkit-scrollbar-thumb:active,
.calc-course-ai__feed::-webkit-scrollbar-thumb:active {
  background-color: var(--cc-scrollbar-thumb-active);
}

.calc-course-toc::-webkit-scrollbar-corner,
.calc-course-lesson::-webkit-scrollbar-corner,
.calc-course-ai__feed::-webkit-scrollbar-corner {
  background: transparent;
}

@media (prefers-reduced-motion: reduce) {
  .calc-course-toc::-webkit-scrollbar-thumb,
  .calc-course-lesson::-webkit-scrollbar-thumb,
  .calc-course-ai__feed::-webkit-scrollbar-thumb {
    transition: none;
  }
}

/* Свёрнутое оглавление — узкая полоска с кнопкой, как у панели курса Python. */
.calc-course--toc-collapsed {
  --calc-course-toc-w: 48px;
}

.calc-course--toc-collapsed .calc-course-toc {
  align-items: center;
  padding: 10px 0;
  overflow: hidden;
  cursor: pointer;
}

.calc-course--toc-collapsed .calc-course-toc__logo,
.calc-course--toc-collapsed .calc-course-toc__titles,
.calc-course--toc-collapsed .calc-course-toc__body {
  display: none;
}

.calc-course--toc-collapsed .calc-course-toc__collapse {
  transform: rotate(180deg);
}

.calc-course--toc-collapsed .calc-course-toc__rail-label {
  display: block;
}

/* Свёрнута вся левая часть (содержание + урок): лист Calc на всю ширину. */
.calc-course__rail {
  display: none;
}

@media (min-width: 1101px) {
  .calc-course--left-collapsed {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .calc-course--left-collapsed .calc-course__toc,
  .calc-course--left-collapsed .calc-course__main,
  .calc-course--left-collapsed .calc-course__resizer {
    display: none;
  }

  .calc-course--left-collapsed .calc-course__rail {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    position: relative;
    min-width: 0;
    padding: 10px 0;
    border: 0;
    border-right: 1px solid var(--cc-border);
    background: var(--cc-surface);
    color: var(--cc-muted);
    font: inherit;
    cursor: pointer;
  }
}

.calc-course__rail:hover {
  background: var(--cc-surface-2);
}

.calc-course__rail:focus-visible {
  outline: 2px solid var(--cc-accent);
  outline-offset: -2px;
}

.calc-course__rail-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid rgba(5, 184, 125, 0.32);
  background: var(--cc-accent-soft);
  color: var(--cc-accent);
  font-size: 1.15rem;
  line-height: 1;
}

.calc-course__rail-label {
  max-height: 60vh;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

/* Нейрошка написала, пока урок свёрнут. */
.calc-course__rail-unread {
  display: none;
  position: absolute;
  top: 8px;
  right: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cc-accent);
  box-shadow: 0 0 0 3px rgba(5, 184, 125, 0.25);
  animation: calc-course-unread-pulse 1.6s ease-in-out infinite;
}

.calc-course__rail--unread .calc-course__rail-unread {
  display: block;
}

@keyframes calc-course-unread-pulse {
  50% {
    box-shadow: 0 0 0 6px rgba(5, 184, 125, 0);
  }
}

.calc-course-lesson__collapse {
  flex: none;
  margin-left: auto;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid var(--cc-border);
  background: var(--cc-surface);
  color: var(--cc-text);
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.calc-course-lesson__collapse:hover {
  border-color: var(--cc-accent);
  color: var(--cc-accent);
}

.calc-course-lesson__collapse:focus-visible {
  outline: 2px solid var(--cc-accent);
  outline-offset: 2px;
}

.calc-course--resizing,
.calc-course--resizing * {
  cursor: col-resize !important;
  user-select: none;
}

.calc-course--resizing {
  transition: none;
}

.calc-course--resizing .calc-course-sheet__frame {
  pointer-events: none;
}

/* ---------- оглавление ---------- */

.calc-course__toc {
  min-width: 0;
  overflow: hidden;
  border-right: 1px solid var(--cc-border);
  background: var(--cc-surface);
}

.calc-course-toc {
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 16px 12px 12px;
  box-sizing: border-box;
}

.calc-course-toc__head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.calc-course-toc__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(24, 163, 3, 0.16);
  flex: none;
}

.calc-course-toc__title {
  margin: 0;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.25;
}

.calc-course-toc__titles {
  flex: 1 1 auto;
  min-width: 0;
}

.calc-course-toc__collapse {
  flex: none;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid rgba(5, 184, 125, 0.32);
  background: var(--cc-accent-soft);
  color: var(--cc-accent);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.15s ease, background 0.15s ease;
}

.calc-course-toc__collapse:hover {
  border-color: var(--cc-accent);
  background: rgba(5, 184, 125, 0.24);
}

.calc-course-toc__collapse:focus-visible {
  outline: 2px solid var(--cc-accent);
  outline-offset: 2px;
}

.calc-course-toc__rail-label {
  display: none;
  margin-top: 14px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cc-muted);
  user-select: none;
}

.calc-course-toc__body {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.calc-course-toc__sandbox {
  margin: 14px 4px 0;
  font-size: 0.82rem;
  color: var(--cc-accent);
  text-decoration: none;
}

.calc-course-toc__sandbox:hover {
  text-decoration: underline;
}

.calc-course-toc__progress {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: var(--cc-muted);
}

.calc-course-toc__bar {
  height: 4px;
  margin: 12px 2px 14px;
  border-radius: 4px;
  background: var(--cc-surface-2);
  overflow: hidden;
}

.calc-course-toc__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cc-calc), var(--cc-accent));
  transition: width 0.4s ease;
}

.calc-course-toc__modules {
  flex: 1 1 auto;
}

.calc-course-toc__module {
  margin-bottom: 4px;
}

.calc-course-toc__module-title {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 6px;
  border-radius: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.3;
}

.calc-course-toc__module-title::-webkit-details-marker {
  display: none;
}

.calc-course-toc__module-title:hover {
  background: var(--cc-surface-2);
}

.calc-course-toc__module-num {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  background: var(--cc-surface-2);
  color: var(--cc-muted);
}

.calc-course-toc__module[open] .calc-course-toc__module-num {
  background: var(--cc-accent-soft);
  color: var(--cc-accent);
}

.calc-course-toc__lessons {
  list-style: none;
  margin: 2px 0 6px;
  padding: 0 0 0 14px;
}

.calc-course-toc__lesson {
  display: grid;
  grid-template-columns: 30px 1fr 14px;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  border-radius: 8px;
  color: var(--cc-muted);
  text-decoration: none;
  font-size: 0.83rem;
  line-height: 1.3;
}

.calc-course-toc__lesson:hover {
  background: var(--cc-surface-2);
  color: var(--cc-text);
}

.calc-course-toc__lesson--active {
  background: var(--cc-accent-soft);
  color: var(--cc-text);
  font-weight: 600;
}

.calc-course-toc__lesson-num {
  font-variant-numeric: tabular-nums;
  opacity: 0.8;
}

.calc-course-toc__lesson-state {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--cc-border);
  box-sizing: border-box;
}

.calc-course-toc__lesson--partial .calc-course-toc__lesson-state {
  border-color: var(--cc-accent);
}

.calc-course-toc__lesson--done .calc-course-toc__lesson-state {
  border-color: var(--cc-accent);
  background: var(--cc-accent);
}

/* «Ритмы мозга» внизу оглавления; когда оглавление скрыто, course.js переносит виджет в шапку. */
.calc-course-toc__ambient {
  display: flex;
  margin: 14px 4px 0;
}

/* Оглавление обрезает всё, что шире него, — панель сцен закрепляем у левого нижнего угла окна. */
.calc-course-toc__ambient .home-ambient-widget--footer .home-ambient-panel {
  position: fixed;
  top: auto;
  right: auto;
  left: 12px;
  bottom: 64px;
}

/* Меню «Войти» в шапке: hf_task_account_menu.js выносит панель в body, без ширины подсказка тянется в строку. */
body.calc-course-body .hf-task-account-menu__panel {
  width: 16rem;
  background-color: #12171c;
}

[data-theme="light"] body.calc-course-body .hf-task-account-menu__panel {
  background-color: #ffffff;
}

/* В шапке — только иконка, чтобы шапка помещалась. */
.calc-course-header-ambient {
  display: flex;
  align-items: center;
}

.calc-course-header-ambient .home-ambient__label {
  display: none;
}

.calc-course-header-ambient .home-ambient {
  padding: 0.44rem;
  min-width: 2.35rem;
  justify-content: center;
}

.calc-course-toc__source {
  margin: 12px 4px 0;
  font-size: 0.72rem;
  color: var(--cc-muted);
}

.calc-course-toc__source a {
  color: inherit;
}

/* ---------- центральная колонка ---------- */

.calc-course__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.calc-course-lesson {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 16px 22px 12px;
}

.calc-course-lesson__top {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.calc-course-lesson__crumbs {
  margin: 0;
  font-size: 0.78rem;
  color: var(--cc-muted);
}

.calc-course-lesson__title {
  margin: 2px 0 0;
  font-size: 1.35rem;
  line-height: 1.25;
  font-weight: 700;
}

/* Дорожка шагов: подпись «Теория-1 / Практика-1 / Тест», значок и цвет — по типу. */
.calc-course-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 14px 0 12px;
  padding: 0;
}

.calc-course-steps__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 10px;
  border-radius: 8px;
  border: 1px solid var(--cc-border);
  background: var(--cc-surface);
  color: var(--cc-text);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.calc-course-steps__item::before {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--cc-muted);
}

.calc-course-steps__item--theory::before {
  content: "T";
}

.calc-course-steps__item--task::before {
  content: "ƒ";
  color: var(--cc-calc);
}

.calc-course-steps__item--quiz::before {
  content: "?";
  color: var(--cc-tip);
}

.calc-course-steps__item:hover {
  transform: translateY(-1px);
  border-color: var(--cc-accent);
}

.calc-course-steps__item--active {
  border-color: var(--cc-accent);
  box-shadow: 0 0 0 2px var(--cc-accent-soft);
}

.calc-course-steps__item--done {
  background: var(--cc-accent-soft);
  border-color: rgba(5, 184, 125, 0.5);
}

.calc-course-steps__item--done::after {
  content: "";
  position: absolute;
  right: -3px;
  top: -3px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cc-accent);
}

.calc-course-step {
  border: 1px solid var(--cc-border);
  border-radius: var(--cc-radius);
  background: var(--cc-surface);
  padding: 16px 18px;
}

.calc-course-step__kind {
  margin: 0;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--cc-muted);
}

.calc-course-step__kind--task {
  color: var(--cc-calc);
}

.calc-course-step__kind--quiz {
  color: var(--cc-tip);
}

.calc-course-step__title {
  margin: 4px 0 10px;
  font-size: 1.12rem;
  font-weight: 700;
}

.calc-course-step__title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 12px;
}

.calc-course-step__listen {
  flex: none;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--cc-border);
  background: transparent;
  color: var(--cc-accent);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.calc-course-step__listen:hover,
.calc-course-step__listen--playing {
  border-color: var(--cc-accent);
  background: color-mix(in srgb, var(--cc-accent) 12%, transparent);
}

.calc-course-step__body {
  font-size: 0.95rem;
  line-height: 1.6;
}

.calc-course-step__body p,
.calc-course-step__body ul,
.calc-course-step__body ol {
  margin: 0 0 10px;
}

.calc-course-step__body a {
  color: var(--cc-accent);
}

.calc-course-step__body code,
.calc-course-ai code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--cc-surface-2);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 0.88em;
}

.calc-course-step__body pre {
  margin: 0 0 10px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--cc-surface-2);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 0.85rem;
  overflow-x: auto;
}

.calc-course-step__body table {
  width: 100%;
  margin: 0 0 12px;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.calc-course-step__body th,
.calc-course-step__body td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--cc-border);
  text-align: left;
  vertical-align: top;
}

.calc-course-step__body th {
  color: var(--cc-muted);
  font-weight: 600;
}

.calc-course-step kbd,
.calc-course-ai kbd {
  padding: 1px 6px;
  border-radius: 5px;
  border: 1px solid var(--cc-border);
  border-bottom-width: 2px;
  font-size: 0.82em;
  font-family: inherit;
}

.calc-course-quiz {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.calc-course-quiz__option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--cc-border);
  border-radius: 9px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.calc-course-quiz__option:hover {
  border-color: var(--cc-accent);
}

.calc-course-quiz__option--ok {
  border-color: var(--cc-accent);
  background: var(--cc-accent-soft);
}

.calc-course-quiz__option--bad {
  border-color: var(--cc-bad);
  background: rgba(255, 107, 107, 0.1);
}

.calc-course-step__feedback {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 9px;
  border: 1px solid var(--cc-border);
  font-size: 0.9rem;
}

.calc-course-step__feedback p {
  margin: 0 0 4px;
}

.calc-course-step__feedback ul {
  margin: 4px 0 0;
  padding-left: 0;
  list-style: none;
}

.calc-course-step__feedback--ok {
  border-color: rgba(5, 184, 125, 0.45);
  background: var(--cc-accent-soft);
}

.calc-course-step__feedback--bad {
  border-color: rgba(255, 107, 107, 0.45);
  background: rgba(255, 107, 107, 0.08);
}

.calc-course-step__feedback--warn,
.calc-course-step__feedback--tip {
  border-color: rgba(122, 167, 255, 0.4);
  background: rgba(122, 167, 255, 0.08);
}

.calc-course-check {
  padding: 2px 0 2px 20px;
  position: relative;
}

.calc-course-check::before {
  position: absolute;
  left: 0;
  font-weight: 700;
}

.calc-course-check--ok::before {
  content: "✓";
  color: var(--cc-accent);
}

.calc-course-check--bad::before {
  content: "✗";
  color: var(--cc-bad);
}

.calc-course-step__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
}

.calc-course-step__actions-spacer {
  flex: 1 1 auto;
}

.calc-course-btn {
  padding: 8px 14px;
  border-radius: 9px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.calc-course-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.calc-course-btn--primary {
  background: var(--cc-accent);
  color: #fff;
}

.calc-course-btn--primary:hover:not(:disabled) {
  background: #04a26e;
}

.calc-course-btn--ghost {
  background: transparent;
  border-color: var(--cc-border);
  color: var(--cc-text);
}

.calc-course-btn--ghost:hover:not(:disabled) {
  border-color: var(--cc-accent);
}

.calc-course-lesson__pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 14px 2px 4px;
  font-size: 0.82rem;
}

.calc-course-lesson__pager-link {
  color: var(--cc-muted);
  text-decoration: none;
}

.calc-course-lesson__pager-link:hover {
  color: var(--cc-accent);
}

.calc-course-lesson__pager-link--next {
  text-align: right;
}

/* ---------- Нейрошка ---------- */

.calc-course-ai {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  height: var(--calc-course-ai-h, min(38%, 340px));
  min-height: 120px;
  background: linear-gradient(180deg, rgba(5, 184, 125, 0.06), transparent 60%), var(--cc-surface);
}

.calc-course-ai--collapsed {
  height: auto;
  min-height: 0;
}

.calc-course-ai--collapsed .calc-course-ai__body {
  display: none;
}

.calc-course-ai__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
}

.calc-course-ai__avatar {
  position: relative;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 30%, rgba(5, 184, 125, 0.45), rgba(5, 184, 125, 0.12));
}

.calc-course-ai__pulse {
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid var(--cc-accent);
  opacity: 0;
}

.calc-course-ai--busy .calc-course-ai__pulse {
  animation: calc-course-ai-pulse 1.2s ease-out infinite;
}

@keyframes calc-course-ai-pulse {
  from {
    opacity: 0.8;
    transform: scale(0.9);
  }
  to {
    opacity: 0;
    transform: scale(1.25);
  }
}

.calc-course-ai__titles {
  flex: 1 1 auto;
  min-width: 0;
}

.calc-course-ai__name {
  margin: 0;
  font-weight: 700;
  font-size: 0.92rem;
}

.calc-course-ai__status {
  margin: 0;
  font-size: 0.74rem;
  color: var(--cc-muted);
}

.calc-course-ai--busy .calc-course-ai__status {
  color: var(--cc-accent);
}

.calc-course-ai__skills {
  display: flex;
  gap: 4px;
}

.calc-course-ai__skill {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--cc-muted);
  border: 1px solid var(--cc-border);
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.calc-course-ai__skill--earned {
  color: var(--cc-accent);
  border-color: rgba(5, 184, 125, 0.45);
}

.calc-course-ai__skill--flash {
  transform: scale(1.2);
  background: var(--cc-accent-soft);
}

.calc-course-ai__voice {
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 8px;
  border: 1px solid var(--cc-border);
  background: transparent;
  font-size: 0.85rem;
  cursor: pointer;
}

.calc-course-ai__voice[aria-pressed="false"] {
  opacity: 0.6;
}

/* Пока Нейрошка говорит, аватар «дышит». */
.calc-course-ai--speaking .calc-course-ai__pulse {
  animation: calc-course-ai-pulse 0.9s ease-out infinite;
}

.calc-course-ai--speaking .calc-course-ai__status {
  color: var(--cc-accent);
}

.calc-course-ai__collapse {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid var(--cc-border);
  background: transparent;
  color: var(--cc-text);
  cursor: pointer;
}

.calc-course-ai__body {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 0 14px 10px;
}

.calc-course-ai__feed {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  list-style: none;
  margin: 0;
  padding: 2px 2px 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-course-ai__msg {
  max-width: 92%;
  padding: 7px 11px;
  border-radius: 12px 12px 12px 4px;
  font-size: 0.86rem;
  line-height: 1.45;
  background: var(--cc-surface-2);
  border-left: 3px solid var(--cc-border);
  animation: calc-course-ai-in 0.25s ease-out;
}

@keyframes calc-course-ai-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.calc-course-ai__msg--tip {
  border-left-color: var(--cc-tip);
}

.calc-course-ai__msg--ok {
  border-left-color: var(--cc-accent);
}

.calc-course-ai__msg--warn {
  border-left-color: var(--cc-warn);
}

.calc-course-ai__msg--err {
  border-left-color: var(--cc-bad);
}

.calc-course-ai__msg--answer {
  border-left-color: var(--cc-accent);
}

.calc-course-ai__msg--answer pre {
  margin: 6px 0;
  padding: 6px 8px;
  border-radius: 6px;
  background: var(--cc-surface);
  white-space: pre-wrap;
}

.calc-course-ai__msg--live {
  border: 1px dashed rgba(5, 184, 125, 0.55);
  border-left-width: 3px;
  background: var(--cc-accent-soft);
}

.calc-course-ai__live-label {
  display: block;
  margin-bottom: 2px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cc-accent);
}

.calc-course-ai__arg--active {
  color: var(--cc-accent);
  text-decoration: underline;
}

.calc-course-ai__msg--user {
  align-self: flex-end;
  border-radius: 12px 12px 4px 12px;
  border-left: none;
  background: rgba(122, 167, 255, 0.16);
}

.calc-course-ai__dots {
  display: inline-flex;
  gap: 4px;
}

.calc-course-ai__dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cc-muted);
  animation: calc-course-ai-dot 1s ease-in-out infinite;
}

.calc-course-ai__dots i:nth-child(2) {
  animation-delay: 0.15s;
}

.calc-course-ai__dots i:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes calc-course-ai-dot {
  0%,
  100% {
    opacity: 0.3;
    transform: translateY(0);
  }
  50% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

.calc-course-ai__ask {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.calc-course-ai__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--cc-border);
  background: var(--cc-surface-2);
  color: var(--cc-text);
  font: inherit;
  font-size: 0.86rem;
}

.calc-course-ai__input:focus {
  outline: none;
  border-color: var(--cc-accent);
}

.calc-course-ai__send {
  width: 38px;
  border-radius: 10px;
  border: none;
  background: var(--cc-accent);
  color: #fff;
  cursor: pointer;
}

/* Горизонтальный разделитель «шаг ↔ Нейрошка»; линия заменяет прежнюю border-top у Нейрошки. */
.calc-course__ai-resizer {
  flex: 0 0 8px;
  margin-top: -4px;
  position: relative;
  z-index: 1;
  cursor: row-resize;
  touch-action: none;
}

.calc-course__ai-resizer::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 3px;
  height: 2px;
  background: var(--cc-border);
  transition: background 0.15s ease;
}

.calc-course__ai-resizer:hover::after,
.calc-course__ai-resizer:focus-visible::after,
.calc-course--ai-resizing .calc-course__ai-resizer::after {
  background: var(--cc-accent);
}

.calc-course--ai-resizing,
.calc-course--ai-resizing * {
  cursor: row-resize !important;
  user-select: none;
}

.calc-course--ai-resizing .calc-course-sheet__frame {
  pointer-events: none;
}

/* Свёрнутую Нейрошку тянуть нечего — остаётся только линия. */
.calc-course__ai-resizer:has(+ .calc-course-ai--collapsed) {
  pointer-events: none;
}

/* ---------- разделитель и лист ---------- */

.calc-course__resizer {
  cursor: col-resize;
  background: transparent;
  position: relative;
}

.calc-course__resizer::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 3px;
  width: 2px;
  background: var(--cc-border);
  transition: background 0.15s ease;
}

.calc-course__resizer:hover::after,
.calc-course__resizer:focus-visible::after,
.calc-course--resizing .calc-course__resizer::after {
  background: var(--cc-accent);
}

.calc-course__sheet {
  min-width: 0;
  position: relative;
  border-left: 1px solid var(--cc-border);
}

.calc-course-sheet__frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.calc-course-sheet__loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cc-muted);
  font-size: 0.9rem;
  background: var(--bg, #23282d);
}

.calc-course-sheet__loading[hidden] {
  display: none;
}

/* ---------- узкие экраны: лист под уроком ---------- */

@media (max-width: 1100px) {
  .calc-course {
    --calc-course-toc-w: 0px;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto 70vh;
    height: auto;
  }

  .calc-course__toc,
  .calc-course__resizer,
  .calc-course__rail,
  .calc-course-lesson__collapse {
    display: none;
  }

  .calc-course__main {
    overflow: visible;
  }

  .calc-course-lesson {
    overflow: visible;
  }

  .calc-course-ai {
    height: 300px;
  }

  .calc-course__ai-resizer {
    pointer-events: none;
  }
}