/**
 * Страница решения задания 2 — task_solve
 * NeuroEGE
 */

/* Header с вариантами (без лого и меню) */
.header--task {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.75rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  margin-left: -0.5rem;
}

/* Круг с номером задания 2 — толстая рамка с круговой зелено-белой анимацией */
@keyframes task-circle-border-spin {
  to {
    transform: rotate(360deg);
  }
}

.task-circle--header {
  position: relative;
  flex-shrink: 0;
  width: 4rem;
  height: 4rem;
  min-width: 4rem;
  min-height: 4rem;
  margin-right: 1rem;
  border: none;
  background: linear-gradient(145deg, #1e2a26 0%, #1a2522 50%, #16201d 100%);
  box-shadow:
    inset 1px 1px 3px rgba(5, 184, 125, 0.15),
    0 0 12px rgba(5, 184, 125, 0.25);
  z-index: 1;
}

/* Рамка: градиент только по периметру (кольцо), центр без анимации */
.task-circle--header::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--green),
    rgba(255, 255, 255, 0.95),
    var(--green),
    rgba(5, 184, 125, 0.4),
    var(--green),
    rgba(255, 255, 255, 0.95),
    var(--green),
    rgba(5, 184, 125, 0.4),
    var(--green)
  );
  mask: radial-gradient(circle, transparent 2rem, black calc(2rem + 4px));
  -webkit-mask: radial-gradient(circle, transparent 2rem, black calc(2rem + 4px));
  animation: task-circle-border-spin 30s linear infinite;
  z-index: -1;
}

.task-circle--header:hover::before {
  animation-duration: 20s;
}

.task-circle--header:hover {
  box-shadow:
    inset 1px 1px 3px rgba(5, 184, 125, 0.2),
    0 0 16px rgba(5, 184, 125, 0.4);
}

.task-circle--header .task-circle__number {
  font-size: 2rem;
  color: var(--green);
}

.header--task .header__right {
  margin-left: auto;
}

.header__variants {
  display: flex;
  justify-content: flex-start;
  min-width: 0;
}

.header__variants-scroll {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.25rem 0;
  scrollbar-width: thin;
}

.header__variants-scroll::-webkit-scrollbar {
  height: 6px;
}

.header__variants-scroll::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
  border-radius: 3px;
}

.header__variants-empty {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Variant circle — компактный размер, выравнивание по левому краю */
.variant-circle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  min-width: 4rem;
  min-height: 4rem;
  padding: 0.3rem;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  cursor: pointer;
  background: linear-gradient(145deg, #2a2f35 0%, #23282d 50%, #1e2228 100%);
  box-shadow:
    inset 1px 1px 3px rgba(255, 255, 255, 0.08),
    inset -1px -1px 2px rgba(0, 0, 0, 0.2),
    0 2px 6px rgba(0, 0, 0, 0.3);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  flex-shrink: 0;
}

.variant-circle:hover {
  border-color: var(--green);
  box-shadow:
    inset 2px 2px 6px rgba(255, 255, 255, 0.1),
    0 0 12px rgba(5, 184, 125, 0.2);
}

.variant-circle--active {
  border-color: var(--green);
  box-shadow: 0 0 16px rgba(5, 184, 125, 0.35);
}

.variant-circle__title {
  font-size: 0.5625rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.15;
  word-break: break-word;
  overflow-wrap: break-word;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* Страница: сетка 2 колонки — секция справа (текст задания) в первом ряду у верхнего края */
.task-solve-page {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr auto;
  gap: 0 1.5rem;
  min-height: 100vh;
  padding: 0 2rem 0 2rem;
}

.task-solve-page .header--task {
  grid-column: 1;
  grid-row: 1;
}

.task-solve__right {
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: start;
  min-height: 0;
}

.task-solve-main {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0.5rem 0 2rem 0;
  position: relative;
  z-index: 5;
}

.task-solve__left {
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.task-solve-page .footer {
  grid-column: 1 / -1;
  grid-row: 3;
}

/* Sandbox */
.task-sandbox {
  display: flex;
  flex-direction: column;
  background: #1e2228;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.task-sandbox__header {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.task-sandbox__editor {
  flex: 1;
  min-height: 420px;
  padding: 1rem;
  font-family: "JetBrains Mono", "Fira Code", "Consolas", monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--white);
  background: transparent;
  border: none;
  resize: vertical;
}

.task-sandbox__editor:focus {
  outline: none;
}

.task-sandbox__editor::placeholder {
  color: var(--text-muted);
}

/* Текст задания */
.task-solve__statement {
  background: #1e2228;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: auto;
}

/* Заголовок варианта — как у Python-тренажёр, с зелёными акцентами */
.task-statement__header {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--green);
  background: rgba(5, 184, 125, 0.08);
  border-bottom: 1px solid rgba(5, 184, 125, 0.35);
  border-left: 3px solid var(--green);
}

.task-statement__content {
  padding: 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.task-statement__content table {
  border-collapse: collapse;
  margin: 1rem 0;
}

.task-statement__content th,
.task-statement__content td {
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.5rem 0.75rem;
}

.task-statement__content p {
  margin-bottom: 0.75rem;
}

.task-statement__empty {
  color: var(--text-muted);
}

/* Форма ответа */
.task-solve__answer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0 0;
  flex-shrink: 0;
}

.task-answer-form {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.task-answer-form__label {
  font-size: 0.9375rem;
  font-weight: 500;
}

.task-answer-form__input {
  padding: 0.625rem 1rem;
  font-size: 0.9375rem;
  background: #1e2228;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  color: var(--white);
  min-width: 12rem;
}

.task-answer-form__input:focus {
  outline: none;
  border-color: var(--green);
}

.task-answer-form__input::placeholder {
  color: var(--text-muted);
}

.task-answer-form__btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--bg);
  background: var(--green);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.task-answer-form__btn:hover {
  opacity: 0.9;
}

/* Светлая тема */
[data-theme="light"] .task-circle--header {
  background: linear-gradient(145deg, #e8f5f0 0%, #e0f0e8 50%, #d8ebe4 100%);
}

[data-theme="light"] .variant-circle {
  border-color: rgba(0, 0, 0, 0.2);
  background: linear-gradient(145deg, #ffffff 0%, #f5f5f7 50%, #ececef 100%);
  box-shadow:
    inset 1px 1px 3px rgba(255, 255, 255, 0.9),
    0 2px 6px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .variant-circle:hover {
  box-shadow:
    inset 2px 2px 6px rgba(255, 255, 255, 0.95),
    0 0 12px rgba(5, 184, 125, 0.25);
}

[data-theme="light"] .task-solve__statement {
  background: #e8e8ed;
  border-color: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .task-statement__header {
  background: rgba(5, 184, 125, 0.1);
  border-bottom-color: rgba(5, 184, 125, 0.3);
}

[data-theme="light"] .task-statement__content th,
[data-theme="light"] .task-statement__content td {
  border-color: rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .task-answer-form__input {
  background: #e8e8ed;
  border-color: rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .header__variants-scroll::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.25);
}

/* Видео вместо Pyodide (task-view toggle) */
.task-view {
  display: flex;
  flex-direction: column;
}

.task-view--sandbox {
  min-height: 0;
}

.task-view--video {
  min-height: min(55vh, 500px);
}

.task-view--sandbox[hidden],
.task-view--video[hidden] {
  display: none !important;
}

.task-view--video {
  background: #1e2228;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

[data-theme="light"] .task-view--video {
  background: #e8e8ed;
  border-color: rgba(0, 0, 0, 0.1);
}

.video-view__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

[data-theme="light"] .video-view__header {
  background: rgba(0, 0, 0, 0.06);
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

.video-view__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--white);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.video-view__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.video-view__btn {
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.video-view__btn:hover {
  color: var(--white);
  border-color: var(--green);
}

[data-theme="light"] .video-view__btn {
  border-color: rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .video-view__btn:hover {
  border-color: var(--green);
}

.video-view__player {
  flex: 1;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 320px;
  background: #000;
}

.video-view__iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Модальное окно на весь экран */
.video-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.video-modal-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.video-modal {
  position: fixed;
  inset: 2rem;
  z-index: 1101;
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
  pointer-events: none;
}

.video-modal.is-open {
  visibility: visible;
  pointer-events: auto;
}

.video-modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--white);
  background: rgba(0, 0, 0, 0.5);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  z-index: 2;
  transition: background 0.2s ease;
  pointer-events: auto;
}

.video-modal__close:hover {
  background: rgba(0, 0, 0, 0.7);
}

.video-modal__player {
  width: 100%;
  max-width: 1200px;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}

.video-modal__iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Панель пошагового объяснения (Explain Mode) */
.explain-panel {
  flex-shrink: 0;
  background: #1e2228;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.explain-panel__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(5, 184, 125, 0.12);
  border-bottom: 1px solid rgba(5, 184, 125, 0.25);
}

.explain-panel__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--green);
}

.explain-panel__progress {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-left: auto;
}

.explain-panel__close {
  width: 2rem;
  height: 2rem;
  padding: 0;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.explain-panel__close:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.explain-panel__body {
  padding: 1rem;
}

.explain-panel__content {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--white);
  margin-bottom: 1rem;
}

.explain-panel__content strong {
  color: var(--green);
}

.explain-panel__code {
  padding: 1rem;
  margin: 0 0 1rem 0;
  font-family: "JetBrains Mono", "Fira Code", "Consolas", monospace;
  font-size: 0.8125rem;
  line-height: 1.5;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  overflow-x: auto;
  white-space: pre;
}

.explain-panel__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.explain-panel__actions-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  justify-content: flex-start;
}

.explain-panel__actions .explain-panel__btn--primary {
  flex-shrink: 0;
}

.explain-panel__actions-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  justify-content: flex-end;
}

.explain-panel__btn--icon {
  padding: 0.5rem 0.6rem;
  font-size: 1rem;
  min-width: 2.25rem;
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.explain-panel__btn--icon:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.18);
}

.explain-panel__btn--icon:disabled {
  opacity: 0.4;
}

.explain-panel__btn--audio {
  padding: 0.5rem 0.75rem;
  font-size: 1.125rem;
  color: var(--green);
  background: rgba(5, 184, 125, 0.15);
  border: 1px solid rgba(5, 184, 125, 0.4);
}

.explain-panel__btn--audio:hover {
  background: rgba(5, 184, 125, 0.25);
}

.explain-panel__btn {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s, background 0.2s;
}

.explain-panel__btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.explain-panel__btn--primary {
  color: var(--bg);
  background: var(--green);
  border: none;
}

.explain-panel__btn--primary:hover:not(:disabled) {
  opacity: 0.9;
}

.explain-panel__btn--secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.explain-panel__btn--secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.22);
}

[data-theme="light"] .explain-panel {
  background: #e8e8ed;
  border-color: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .explain-panel__header {
  background: rgba(5, 184, 125, 0.1);
  border-bottom-color: rgba(5, 184, 125, 0.2);
}

[data-theme="light"] .explain-panel__content {
  color: #1a1a1a;
}

[data-theme="light"] .explain-panel__code {
  background: rgba(0, 0, 0, 0.06);
  border-color: rgba(0, 0, 0, 0.1);
}