body {
  background:
    radial-gradient(circle at top left, rgba(111, 135, 255, 0.14), transparent 28%),
    radial-gradient(circle at top right, rgba(44, 184, 255, 0.08), transparent 24%),
    linear-gradient(180deg, #030817 0%, #061128 48%, #040a18 100%);
  color: var(--color-text);
}

.app-page {
  min-height: 100vh;
}

.app-shell {
  padding: 40px 0 56px;
}

.app-shell .container {
  max-width: 1320px;
}

.app-toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.app-search {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  height: 48px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.app-search__results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 45;
  max-height: 360px;
  overflow-y: auto;
  padding: 8px;
  border-radius: 18px;
  background: #171a2c;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 40px rgba(2, 8, 24, 0.5);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.app-search__results[hidden] {
  display: none;
}

.app-search__icon {
  display: inline-flex;
  opacity: 0.7;
  flex-shrink: 0;
}

.app-search__icon svg {
  width: 16px;
  height: 16px;
}

.app-search__input {
  flex: 1;
  height: 100%;
  border: none;
  background: transparent;
  color: #f5f7ff;
  font-family: inherit;
  font-size: 14.5px;
}

.app-search__input:focus {
  outline: none;
}

.app-search__input::placeholder {
  color: #7985ab;
}

.app-toolbar__exam {
  flex-shrink: 0;
  white-space: nowrap;
}

.app-toolbar__exam svg {
  width: 17px;
  height: 17px;
}

.search-result-btn {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: flex-start;
}

.search-result-btn__topic {
  font-weight: 700;
}

.search-result-btn__discipline {
  font-size: 12px;
  font-weight: 600;
  opacity: 0.7;
}

.notepad__textarea {
  width: 100%;
  min-height: 260px;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
  color: #f5f7ff;
  font-family: inherit;
  font-size: 14.5px;
  line-height: 1.6;
  resize: vertical;
  margin-top: 14px;
}

.notepad__textarea:focus {
  outline: none;
  border-color: rgba(111, 135, 255, 0.5);
}

.notepad__status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 700;
  color: #6dd6a6;
  min-height: 18px;
}

.notepad__status svg {
  width: 14px;
  height: 14px;
}

.app {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.app-selectors {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.app-select {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 240px;
  flex: 1;
}

.app-select__label {
  font-size: 12px;
  font-weight: 700;
  color: #9ca8cb;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.app-select__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  padding: 13px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #f5f7ff;
  font-weight: 700;
  font-size: 14.5px;
  text-align: left;
  transition: background var(--transition), border-color var(--transition);
}

.app-select__btn:hover {
  border-color: rgba(111, 135, 255, 0.38);
  background: rgba(111, 135, 255, 0.14);
}

.app-select__value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-select__btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.app-select:has(.app-select__menu:not([hidden])) .app-select__btn svg {
  transform: rotate(180deg);
}

.app-select__menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 40;
  max-height: 360px;
  overflow-y: auto;
  padding: 8px;
  border-radius: 18px;
  background: #171a2c;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 40px rgba(2, 8, 24, 0.5);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.app-select__menu[hidden] {
  display: none;
}

.panel {
  background: linear-gradient(180deg, rgba(10, 19, 42, 0.95), rgba(7, 14, 32, 0.92));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 30px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(2, 8, 24, 0.52);
  min-height: 480px;
}

.item-btn {
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #9ca8cb;
  font-weight: 700;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    transform 0.18s ease,
    box-shadow 0.18s ease;
}

.item-btn:hover {
  border-color: rgba(111, 135, 255, 0.38);
  background: rgba(111, 135, 255, 0.14);
  color: #fff;
  transform: translateY(-1px);
}

.item-btn:active {
  transform: translateY(0) scale(0.98);
}

.item-btn.is-active {
  background: linear-gradient(135deg, rgba(95, 123, 255, 0.92), rgba(111, 135, 255, 0.85));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 12px 26px rgba(111, 135, 255, 0.22);
}

.item-btn.is-locked {
  opacity: 0.7;
}

.item-lock-badge {
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(111, 135, 255, 0.18);
  color: #b9c4ff;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.paywall {
  max-width: 520px;
  margin-top: 18px;
  padding: 28px;
  border-radius: 20px;
  border: 1px solid rgba(111, 135, 255, 0.22);
  background: rgba(111, 135, 255, 0.06);
}

.paywall__badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(111, 135, 255, 0.18);
  color: #b9c4ff;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.paywall__title {
  color: #f5f7ff;
  font-size: 19px;
  margin-bottom: 10px;
}

.paywall__text {
  color: #9ca8cb;
  font-size: 14.5px;
  line-height: 1.65;
  margin-bottom: 18px;
}

.content-body {
  position: relative;
}

.content-body.is-blurred > *:not(.content-lock-overlay) {
  filter: blur(7px);
  pointer-events: none;
  user-select: none;
}

.content-lock-overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  justify-content: center;
  padding-top: 40px;
}

.content-lock-overlay__card {
  position: sticky;
  top: 110px;
  max-width: 480px;
  height: max-content;
  padding: 30px;
  border-radius: 22px;
  border: 1px solid rgba(111, 135, 255, 0.3);
  background: #12162a;
  box-shadow: 0 30px 70px rgba(2, 8, 24, 0.55);
  text-align: center;
}

.content-lock-overlay__card .paywall__badge {
  margin-bottom: 14px;
}

.content-lock-overlay__card .paywall__text {
  text-align: left;
}

.item-progress__fill {
  transition: width 0.5s cubic-bezier(0.25, 0.7, 0.35, 1);
}

.content {
  padding: 0;
  position: relative;
}

.content__scroll {
  min-height: 100%;
  padding: 28px 26px 32px;
  overflow: visible;
  transition: padding 0.5s cubic-bezier(0.65, 0, 0.35, 1);
}

.content__scroll.content-fade-in {
  animation: contentFadeIn 0.32s cubic-bezier(0.25, 0.7, 0.35, 1);
}

@keyframes contentFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .content__scroll.content-fade-in {
    animation: none;
  }
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  color: #9ca8cb;
  font-size: 13px;
  margin-bottom: 18px;
}

/* ---------------- Быстрый переключатель темы/дисциплины ---------------- */
.crumb-switch {
  position: relative;
}

.crumb-switch__btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px 3px 4px;
  border-radius: 8px;
  color: #d3d8ee;
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition), color var(--transition);
}

.crumb-switch__btn:hover {
  background: rgba(111, 135, 255, 0.14);
  color: #fff;
}

.crumb-switch__btn svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.crumb-switch:has(.crumb-switch__menu:not([hidden])) .crumb-switch__btn svg {
  transform: rotate(180deg);
}

.crumb-switch__menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 40;
  min-width: 240px;
  max-width: 360px;
  max-height: 320px;
  overflow-y: auto;
  padding: 6px;
  border-radius: 14px;
  background: #171a2c;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 40px rgba(2, 8, 24, 0.5);
  display: flex;
  flex-direction: column;
  gap: 2px;
  animation: crumbMenuIn 0.16s ease;
}

.crumb-switch__menu[hidden] {
  display: none;
}

@keyframes crumbMenuIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.crumb-switch__item {
  padding: 8px 10px;
  border-radius: 8px;
  text-align: left;
  font-size: 13px;
  color: #d3d8ee;
  transition: background var(--transition), color var(--transition);
}

.crumb-switch__item:hover {
  background: rgba(111, 135, 255, 0.16);
  color: #fff;
}

.crumb-switch__item.is-active {
  background: rgba(111, 135, 255, 0.22);
  color: #fff;
  font-weight: 700;
}

[data-theme="light"] .crumb-switch__btn {
  color: var(--color-text);
}

[data-theme="light"] .crumb-switch__btn:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

[data-theme="light"] .crumb-switch__menu {
  background: #fff;
  border-color: var(--color-border);
  box-shadow: 0 20px 40px rgba(20, 22, 31, 0.14);
}

[data-theme="light"] .crumb-switch__item {
  color: var(--color-text);
}

[data-theme="light"] .crumb-switch__item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

[data-theme="light"] .crumb-switch__item.is-active {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

[data-theme="light"] .app-select__label {
  color: #6b7285;
}

[data-theme="light"] .app-select__btn {
  background: #ffffff;
  border-color: var(--color-border);
  color: var(--color-text);
}

[data-theme="light"] .app-select__btn:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

[data-theme="light"] .app-select__menu,
[data-theme="light"] .app-search__results {
  background: #fff;
  border-color: var(--color-border);
  box-shadow: 0 20px 40px rgba(20, 22, 31, 0.14);
}

.topic-title {
  font-size: 24px;
  line-height: 1.15;
  color: #f5f7ff;
  margin-bottom: 12px;
  font-weight: 800;
}

.topic-desc {
  color: #9ca8cb;
  margin-bottom: 18px;
  max-width: 720px;
}

.topic-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.topic-tab {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid transparent;
  color: #9ca8cb;
  font-size: 13px;
  font-weight: 700;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.15s ease;
}

.topic-tab:hover {
  color: #fff;
  transform: translateY(-1px);
}

.topic-tab.is-active {
  background: rgba(111, 135, 255, 0.12);
  color: #fff;
  border-color: rgba(111, 135, 255, 0.35);
}

.topic-tab--pdf {
  margin-left: auto;
  background: rgba(111, 135, 255, 0.14);
  color: #d3d8ee;
}

.topic-tab--pdf:hover {
  background: rgba(111, 135, 255, 0.24);
}

.note-box {
  background: rgba(111, 135, 255, 0.08);
  border: 1px solid rgba(111, 135, 255, 0.18);
  border-radius: 18px;
  padding: 18px;
  margin-bottom: 22px;
}

.note-box h3 {
  font-size: 16px;
  color: #f5f7ff;
  margin-bottom: 10px;
}

.note-box p {
  color: #9ca8cb;
}

/* ---------------- Практика ВС РФ ---------------- */
.practice-act {
  margin-bottom: 22px;
}

.practice-act__name {
  font-size: 14px;
  font-weight: 700;
  color: #d3d8ee;
  margin-bottom: 10px;
  line-height: 1.5;
}

.practice-position {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 3px solid rgba(111, 135, 255, 0.5);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.practice-position__point {
  font-size: 12px;
  font-weight: 800;
  color: #6f87ff;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}

.practice-position__text {
  color: #d3d8ee;
  font-size: 14.5px;
  margin: 0 0 8px;
}

.practice-position__why {
  color: #9ca8cb;
  font-size: 13.5px;
  margin: 0;
}

.practice-case {
  background: rgba(111, 135, 255, 0.06);
  border: 1px solid rgba(111, 135, 255, 0.16);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 14px;
}

.practice-case__source {
  font-size: 12.5px;
  font-weight: 700;
  color: #6f87ff;
  margin-bottom: 8px;
}

.practice-case p {
  color: #9ca8cb;
  font-size: 14px;
  margin: 0 0 6px;
}

.practice-case p:last-child {
  margin-bottom: 0;
}

.practice-empty {
  color: #9ca8cb;
  font-size: 14px;
}

[data-theme="light"] .practice-act__name {
  color: #14161f;
}

[data-theme="light"] .practice-position {
  background: #f7f8fd;
  border-color: #dde3f2;
  border-left-color: var(--color-primary);
}

[data-theme="light"] .practice-position__point {
  color: var(--color-primary);
}

[data-theme="light"] .practice-position__text {
  color: #1a1f2e;
}

[data-theme="light"] .practice-position__why,
[data-theme="light"] .practice-case p,
[data-theme="light"] .practice-empty {
  color: #6b7285;
}

[data-theme="light"] .practice-case {
  background: var(--color-primary-light);
  border-color: rgba(61, 90, 254, 0.2);
}

[data-theme="light"] .practice-case__source {
  color: var(--color-primary);
}

/* ---------------- Тест с несколькими правильными ответами ---------------- */
.question--multi .answers label {
  display: flex;
}

.question--multi__hint {
  font-size: 12px;
  color: #6f87ff;
  font-weight: 700;
  margin-bottom: 6px;
}

/* Барьер от бездумного копипаста конспекта — не настоящая защита
   (обходится через DevTools), но убирает "выдели всё → Ctrl+C". */
.theory,
.flashcard__face {
  user-select: none;
}

.theory h2,
.theory h3 {
  color: #f5f7ff;
  font-size: 18px;
  margin: 24px 0 8px;
}

.theory p,
.theory li {
  color: #9ca8cb;
  font-size: 15px;
  line-height: 1.65;
}

.theory p {
  margin: 0 0 14px;
}

.theory ul,
.theory ol {
  padding-left: 18px;
  margin: 8px 0 14px;
}

.theory li {
  margin-bottom: 6px;
}

.theory li:last-child {
  margin-bottom: 0;
}

.theory table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 18px;
  font-size: 14px;
  overflow-x: auto;
  display: block;
}

.theory th,
.theory td {
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: left;
  vertical-align: top;
  color: #9ca8cb;
}

.theory th {
  background: rgba(111, 135, 255, 0.1);
  color: #f5f7ff;
  font-weight: 700;
}

.theory tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

.test-box__title {
  color: #f5f7ff;
  font-size: 22px;
}

.tests-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.test-card {
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
  margin-bottom: 12px;
}

.test-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 16px 18px;
  text-align: left;
}

.test-card__head.is-open {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.test-card__head-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.test-card__title {
  display: block;
  font-size: 14.5px;
  font-weight: 800;
  color: #f5f7ff;
}

.test-card__meta {
  font-size: 12px;
  font-weight: 700;
  color: #9ca8cb;
  flex-shrink: 0;
}

.test-card__chevron {
  width: 16px;
  height: 16px;
  color: #9ca8cb;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.test-card__head.is-open .test-card__chevron {
  transform: rotate(180deg);
}

.test-card__author {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.test-card__author-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.test-card__avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  min-width: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #5f7bff, #7e95ff);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}

.test-card__author-line {
  font-size: 12.5px;
  font-weight: 700;
  color: #9ca8cb;
}

.test-card__level {
  display: inline-flex;
  padding: 1px 7px;
  border-radius: 999px;
  background: rgba(111, 135, 255, 0.16);
  color: #9db3ff;
  font-size: 10.5px;
  font-weight: 800;
}

.test-card__body {
  padding: 16px 18px 18px;
}

.test-card__body[hidden] {
  display: none;
}

.user-tests-list {
  max-height: 480px;
  overflow-y: auto;
  padding-right: 2px;
}

.question {
  padding: 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(13, 24, 53, 0.7), rgba(8, 16, 34, 0.88));
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.question + .question {
  margin-top: 16px;
}

.question h4 {
  color: #f5f7ff;
  font-size: 16px;
  margin-bottom: 12px;
}

.answers {
  display: grid;
  gap: 10px;
}

.answer {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #9ca8cb;
}

.answer input {
  margin-top: 4px;
  accent-color: #6f87ff;
}

.question-result {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  display: none;
  font-size: 14px;
}

.question-result.is-correct {
  display: block;
  background: rgba(109, 214, 166, 0.12);
  border: 1px solid rgba(109, 214, 166, 0.28);
  color: #a8ecc9;
}

.question-result.is-wrong {
  display: block;
  background: rgba(225, 77, 77, 0.12);
  border: 1px solid rgba(225, 77, 77, 0.28);
  color: #ffb3b3;
}

.test-actions {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.summary {
  margin-top: 20px;
  padding: 18px;
  border-radius: 18px;
  background: rgba(111, 135, 255, 0.08);
  border: 1px solid rgba(111, 135, 255, 0.2);
  display: none;
}

.summary.is-visible {
  display: block;
}

.summary h3 {
  color: #f5f7ff;
  margin-bottom: 8px;
}

.summary p {
  color: #f5f7ff;
}

.summary__note {
  margin-top: 8px;
  color: #7985ab;
}

.flashcards {
  margin: 4px 0 32px;
}

.flashcard {
  perspective: 1400px;
  cursor: pointer;
  user-select: none;
  border-radius: 20px;
  animation: cardFadeIn 0.35s ease both;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.flashcard--correct,
.flashcard--wrong {
  animation: cardGradeFlash 0.26s ease;
}

@keyframes cardGradeFlash {
  0% {
    box-shadow: 0 0 0 0 rgba(111, 135, 255, 0);
  }
  40% {
    box-shadow: 0 0 0 6px var(--flash-color, rgba(111, 135, 255, 0.35));
  }
  100% {
    box-shadow: 0 0 0 0 rgba(111, 135, 255, 0);
  }
}

.flashcard--correct {
  --flash-color: rgba(52, 199, 89, 0.4);
}

.flashcard--wrong {
  --flash-color: rgba(255, 69, 58, 0.4);
}

@media (prefers-reduced-motion: reduce) {
  .flashcard,
  .flashcard--correct,
  .flashcard--wrong {
    animation: none !important;
  }
}

.flashcard__inner {
  position: relative;
  min-height: 220px;
  transition: transform 0.5s;
  transform-style: preserve-3d;
}

.flashcard__inner.is-flipped {
  transform: rotateY(180deg);
}

.flashcard__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 32px;
  border-radius: 20px;
  text-align: center;
  backface-visibility: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(13, 24, 53, 0.75), rgba(8, 16, 34, 0.92));
  /* карточки с большим количеством текста иначе вылезают за пределы
     фиксированной высоты .flashcard__inner и наезжают на всё, что идёт
     после карточки (точки уровня, подсказка "Оцени...") — вместо этого
     длинный текст прокручивается внутри самой карточки */
  overflow-y: auto;
}

.flashcard__face--back {
  transform: rotateY(180deg);
  background: linear-gradient(135deg, rgba(95, 123, 255, 0.22), rgba(111, 135, 255, 0.1));
  border-color: rgba(111, 135, 255, 0.3);
}

.flashcard__face p {
  margin: 0;
  color: #f5f7ff;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.flashcard__label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #88a0ff;
}

.flashcard-hint {
  margin-top: 12px;
  color: #7985ab;
  font-size: 13px;
  text-align: center;
}

.flashcards__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.flashcards__due {
  color: #9ca8cb;
  font-size: 13.5px;
  font-weight: 700;
}

.flashcards__meta-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.mode-toggle {
  display: flex;
  align-items: center;
  padding: 3px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.mode-toggle__btn {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  color: #9ca8cb;
  transition: background var(--transition), color var(--transition);
}

.mode-toggle__btn.is-active {
  background: #6f87ff;
  color: #fff;
}

.voice-trainer {
  margin-top: 18px;
  padding: 16px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.voice-trainer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.voice-mic-btn svg {
  width: 16px;
  height: 16px;
}

.voice-mic-btn.is-recording {
  border-color: #ff453a;
  color: #ff453a;
  animation: micPulse 1s ease-in-out infinite;
}

@keyframes micPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 69, 58, 0.35); }
  50% { box-shadow: 0 0 0 6px rgba(255, 69, 58, 0.12); }
}

.voice-trainer__input {
  flex: 1;
  min-width: 200px;
}

.voice-trainer__actions {
  margin-top: 12px;
}

.voice-verdict {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 13.5px;
  font-weight: 700;
}

.voice-verdict--good {
  background: rgba(52, 199, 89, 0.14);
  color: #34c759;
}

.voice-verdict--mid {
  background: rgba(255, 204, 0, 0.14);
  color: #e6b800;
}

.voice-verdict--bad {
  background: rgba(255, 69, 58, 0.14);
  color: #ff453a;
}

.voice-verdict__note {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 500;
  color: #9ca8cb;
}

.flashcard-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 14px;
}

.flashcard-box__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.flashcard-box__dot.is-filled {
  background: #6f87ff;
}

.flashcard-grade {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 16px;
}

.flashcard-grade svg {
  width: 17px;
  height: 17px;
}

.cards-empty {
  padding: 32px;
  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.14);
  text-align: center;
}

[data-theme="light"] body {
  background: #f3f5fb;
}

[data-theme="light"] .panel {
  background: #ffffff;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 60px rgba(20, 22, 31, 0.08);
}

[data-theme="light"] .topic-title,
[data-theme="light"] .question h4,
[data-theme="light"] .note-box h3,
[data-theme="light"] .theory h2,
[data-theme="light"] .theory h3,
[data-theme="light"] .summary h3 {
  color: #14161f;
}

[data-theme="light"] .breadcrumbs,
[data-theme="light"] .topic-desc,
[data-theme="light"] .summary__note {
  color: #6b7285;
}

[data-theme="light"] .item-btn {
  background: #ffffff;
  border: 1px solid var(--color-border);
  color: #1a1f2e;
  box-shadow: none;
}

[data-theme="light"] .item-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  box-shadow: none;
}

[data-theme="light"] .item-btn.is-active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  box-shadow: none;
}

[data-theme="light"] .note-box {
  background: #f7f8fd;
  border: 1px solid #dde3f2;
}

[data-theme="light"] .paywall {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

[data-theme="light"] .paywall__title {
  color: #14161f;
}

[data-theme="light"] .paywall__text {
  color: #6b7285;
}

[data-theme="light"] .paywall__badge,
[data-theme="light"] .item-lock-badge {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

[data-theme="light"] .content-lock-overlay__card {
  background: #ffffff;
  border-color: var(--color-border);
  box-shadow: 0 30px 70px rgba(20, 22, 31, 0.18);
}

[data-theme="light"] .note-box p,
[data-theme="light"] .theory p,
[data-theme="light"] .theory li,
[data-theme="light"] .answer,
[data-theme="light"] .summary p {
  color: #384152;
}

[data-theme="light"] .theory th,
[data-theme="light"] .theory td {
  border-color: var(--color-border);
  color: #384152;
}

[data-theme="light"] .theory th {
  background: var(--color-primary-light);
  color: #14161f;
}

[data-theme="light"] .theory tr:nth-child(even) td {
  background: #f7f8fd;
}

[data-theme="light"] .topic-tab {
  background: #f3f5fb;
  color: #687087;
}

[data-theme="light"] .topic-tab.is-active {
  background: #e9eeff;
  color: var(--color-primary-dark);
  border: 1px solid #d9e1ff;
}

[data-theme="light"] .question {
  background: #ffffff;
  border: 1px solid var(--color-border);
}

[data-theme="light"] .test-box__title {
  color: #14161f;
}

[data-theme="light"] .test-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
}

[data-theme="light"] .test-card__head.is-open {
  border-bottom: 1px solid var(--color-border);
}

[data-theme="light"] .test-card__title {
  color: #14161f;
}

[data-theme="light"] .test-card__meta,
[data-theme="light"] .test-card__chevron,
[data-theme="light"] .test-card__author-line {
  color: #687087;
}

[data-theme="light"] .test-card__level {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

[data-theme="light"] .answer {
  background: #f8f9fd;
  border: 1px solid var(--color-border);
}

[data-theme="light"] .question-result.is-correct {
  background: rgba(31, 183, 116, 0.1);
  border: 1px solid rgba(31, 183, 116, 0.28);
  color: #178a58;
}

[data-theme="light"] .question-result.is-wrong {
  background: rgba(225, 77, 77, 0.08);
  border: 1px solid rgba(225, 77, 77, 0.24);
  color: #b8362f;
}

[data-theme="light"] .flashcard__face {
  background: #ffffff;
  border: 1px solid var(--color-border);
}

[data-theme="light"] .flashcard__face--back {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

[data-theme="light"] .flashcard__face p {
  color: #14161f;
}

[data-theme="light"] .flashcard__label {
  color: var(--color-primary-dark);
}

[data-theme="light"] .flashcard-hint,
[data-theme="light"] .flashcards__due {
  color: #6b7285;
}

[data-theme="light"] .flashcard-box__dot {
  background: var(--color-border);
}

[data-theme="light"] .flashcard-box__dot.is-filled {
  background: var(--color-primary);
}

[data-theme="light"] .mode-toggle {
  background: #f3f5fb;
  border: 1px solid var(--color-border);
}

[data-theme="light"] .mode-toggle__btn {
  color: #687087;
}

[data-theme="light"] .mode-toggle__btn.is-active {
  background: var(--color-primary);
  color: #fff;
}

[data-theme="light"] .voice-trainer {
  background: #f8f9fd;
  border: 1px solid var(--color-border);
}

[data-theme="light"] .voice-verdict__note {
  color: #6b7285;
}

[data-theme="light"] .cards-empty {
  border-color: var(--color-border);
}

[data-theme="light"] .app-search {
  border: 1px solid var(--color-border);
  background: #ffffff;
}

[data-theme="light"] .app-search__input {
  color: #14161f;
}

[data-theme="light"] .app-search__input::placeholder {
  color: #8f96a8;
}

[data-theme="light"] .search-result-btn__discipline {
  opacity: 0.65;
}

[data-theme="light"] .notepad__textarea {
  border: 1px solid var(--color-border);
  background: #ffffff;
  color: #14161f;
}

@media (max-width: 1100px) {
  .app-toolbar {
    flex-wrap: wrap;
  }
}

@media (max-width: 1100px) {
  .panel,
  .content__scroll {
    min-height: auto;
  }

  .app-selectors {
    flex-direction: column;
  }
}

@media (max-width: 600px) {
  .app-shell .container {
    padding: 0 10px;
  }

  .panel {
    border-radius: 18px;
  }

  .content__scroll {
    padding: 16px 12px;
  }

  .question {
    padding: 14px 12px;
    border-radius: 14px;
  }

  .answer {
    padding: 10px 12px;
    border-radius: 12px;
  }

  .app-select {
    min-width: 0;
  }
}

/* ---------------- AI consultant chat widget (demo, no real AI wired yet) ---------------- */
.ai-chat {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.ai-chat__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #5f7bff, #6f87ff 58%, #7e95ff);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 18px 36px rgba(111, 135, 255, 0.32);
}

.ai-chat__toggle svg {
  width: 18px;
  height: 18px;
}

.ai-chat__panel {
  width: min(360px, calc(100vw - 48px));
  max-height: min(480px, calc(100vh - 140px));
  display: flex;
  flex-direction: column;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.ai-chat__panel[hidden] {
  display: none;
}

.ai-chat__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.ai-chat__head-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  font-weight: 800;
  color: var(--color-text);
}

.ai-chat__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, #5f7bff, #7e95ff);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
}

.ai-chat__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.ai-chat__close:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.ai-chat__close svg {
  width: 13px;
  height: 13px;
}

.ai-chat__body {
  flex: 1;
  min-height: 160px;
  max-height: 320px;
  overflow-y: auto;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ai-chat__msg {
  max-width: 88%;
  padding: 10px 13px;
  border-radius: 14px;
  font-size: 13.5px;
  line-height: 1.5;
}

.ai-chat__msg--bot {
  align-self: flex-start;
  background: var(--color-bg-alt);
  color: var(--color-text);
  border-bottom-left-radius: 4px;
}

.ai-chat__msg--user {
  align-self: flex-end;
  background: var(--color-primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.ai-chat__form {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--color-border);
}

.ai-chat__input {
  flex: 1;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1.5px solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 13.5px;
  font-family: inherit;
}

.ai-chat__input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.ai-chat__send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: #fff;
}

.ai-chat__send svg {
  width: 16px;
  height: 16px;
}

.ai-chat__attach {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  min-width: 34px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
}

.ai-chat__attach[hidden] {
  display: none;
}

.ai-chat__attach svg {
  width: 16px;
  height: 16px;
}

.ai-chat__attachment {
  padding: 0 12px 12px;
}

.ai-chat__attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  font-size: 12.5px;
  color: var(--color-text);
}

.ai-chat__attachment-remove {
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1;
  padding: 0;
}

/* Продвинутый ИИ-консультант (годовая подписка) — золотое оформление,
   чтобы визуально отличаться от обычного синего виджета. */
.ai-chat--advanced .ai-chat__toggle {
  background: linear-gradient(135deg, #b8860b, #d4af37 58%, #f0d580);
  box-shadow: 0 18px 36px rgba(212, 175, 55, 0.35);
}

.ai-chat--advanced .ai-chat__badge {
  background: linear-gradient(135deg, #b8860b, #f0d580);
}

.ai-chat--advanced .ai-chat__attach {
  border-color: #d4af37;
  color: #b8860b;
}

.ai-chat--advanced .ai-chat__send {
  background: linear-gradient(135deg, #b8860b, #d4af37);
}

@media (max-width: 640px) {
  .ai-chat {
    right: 16px;
    bottom: 16px;
  }

  .ai-chat__toggle span {
    display: none;
  }

  .flashcard__inner {
    min-height: 280px;
  }

  .flashcard__face {
    padding: 24px 18px;
    max-height: 60vh;
  }

  .flashcard__face p {
    font-size: 16px;
  }
}

/* ---------------- Gamification bar ---------------- */
.gamify-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  margin-bottom: 20px;
  border-radius: 18px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
}

.gamify-bar__level {
  position: relative;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
}

.gamify-bar__rank-icon {
  display: block;
  width: 48px;
  height: 48px;
}

.gamify-bar__level-num {
  position: absolute;
  right: -4px;
  bottom: -4px;
  min-width: 20px;
  height: 20px;
  padding: 0 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 2px solid var(--color-white);
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
}

.gamify-badges__link {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
}

.gamify-bar__main {
  flex: 1;
  min-width: 0;
}

.gamify-bar__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
}

.gamify-bar__title {
  font-size: 14px;
  font-weight: 800;
  color: var(--color-text);
}

.gamify-bar__xp {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.gamify-bar__track {
  height: 8px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  overflow: hidden;
}

.gamify-bar__fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #5f7bff, #7e95ff);
  transition: width 0.4s ease;
}

.gamify-bar__badges-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.gamify-bar__badges-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.gamify-bar__badges-count {
  color: var(--color-primary);
  font-weight: 800;
}

.gamify-badges {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 50;
  width: min(360px, 92vw);
  padding: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
}

.gamify-badges[hidden] {
  display: none;
}

.gamify-badge {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  opacity: 0.45;
}

.gamify-badge.is-earned {
  opacity: 1;
  border-color: rgba(111, 135, 255, 0.4);
  background: var(--color-primary-light);
}

.gamify-badge__title {
  font-size: 12.5px;
  font-weight: 800;
  color: var(--color-text);
}

.gamify-badge__desc {
  font-size: 11px;
  color: var(--color-text-muted);
}

/* ---------------- Progress bars for disciplines/topics ---------------- */
.item-progress {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.item-progress__track {
  flex: 1;
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.item-progress__fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #5f7bff, #7e95ff);
}

.item-progress__label {
  font-size: 11px;
  font-weight: 800;
  color: #9ca8cb;
  flex-shrink: 0;
  min-width: 30px;
  text-align: right;
  white-space: nowrap;
}

[data-theme="light"] .item-progress__track {
  background: #eef0f6;
}

[data-theme="light"] .item-progress__label {
  color: #687087;
}

@media (max-width: 640px) {
  .gamify-bar {
    flex-wrap: wrap;
  }

  .gamify-bar__badges-toggle {
    order: 1;
    width: 100%;
    justify-content: center;
  }
}