@font-face {
  font-family: "Manrope";
  src: url("./fonts/Manrope.ttf") format("truetype");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --color-bg: #eef8ff;
  --color-bg-soft: #f7fcff;
  --color-white: #ffffff;

  --color-text: #10202b;
  --color-muted: #6b7c8f;

  --color-turquoise: #18b8a8;
  --color-blue: #2f80ed;
  --color-light-blue: #6bb7ff;

  --radius-lg: 24px;
  --radius-md: 18px;

  --shadow-soft: 0 18px 45px rgba(16, 32, 43, 0.08);
  --shadow-button: 0 12px 24px rgba(47, 128, 237, 0.22);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Manrope";
  background:
    radial-gradient(circle at top left, rgba(107, 183, 255, 0.35), transparent 34%),
    linear-gradient(180deg, #f7fcff 0%, var(--color-bg) 100%);
  color: var(--color-text);
  min-height: 100vh;
}

button,
input,
textarea,
select {
  font-family: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(107, 183, 255, 0.34);
  outline-offset: 3px;
}

.app {
  width: 100%;
  min-height: 100vh;
  padding: 32px;
}

.app-shell {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
}

.page {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.72);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(131, 212, 241, 0.22);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1 1 auto;
}

.logo-image {
  width: 84px;
  height: 84px;
  object-fit: contain;
  flex: 0 0 auto;
}

.logo-text {
  display: flex;
  min-width: 0;
}

.logo-title {
  font-size: 23px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo-link {
  color: var(--color-blue);
  text-decoration: none;
  margin-left: 0;
  transition: 0.2s ease;
}

.logo-link:hover {
  opacity: 0.8;
}

.logo-link:focus-visible {
  outline: none;
}

.profile-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
}

.profile-link:hover {
  color: var(--color-blue);
}

@media (max-width: 900px) {
  .logo {
    min-width: 0;
  }

  .logo-title {
    font-size: 20px;
    white-space: normal;
  }

  .logo-image {
    width: 70px;
    height: 70px;
  }
}

.nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
  flex: 0 1 auto;
}

.nav-button {
  border: 0;
  background: transparent;
  color: var(--color-muted);
  padding: 10px 12px;
  border-radius: 999px;
  font-size: 14px;
  transition: 0.28s ease;
}

.nav-button:hover,
.nav-button.active {
  background: rgba(47, 144, 216, 0.1);
  color: var(--color-blue);
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 24px;
  align-items: stretch;
}

.hero-card {
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #ffffff 0%, #eff9ff 100%);
  box-shadow: var(--shadow-soft);
}

.hero-title {
  margin: 0;
  font-size: 38px;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-text {
  max-width: 660px;
  margin: 16px 0 0;
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.stats-card {
  padding: 22px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-turquoise), var(--color-blue));
  color: white;
  box-shadow: var(--shadow-button);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
  overflow: hidden;
}

.stats-arrow {
  display: block;
  width: 100%;
  font-size: 46px;
  font-weight: 800;
  line-height: 1;
  animation: arrowMoveFade 2.6s ease-in-out infinite;
  will-change: transform, opacity;
}

@keyframes arrowMoveFade {
  0% {
    transform: translateX(0);
    opacity: 0;
  }

  18% {
    transform: translateX(0);
    opacity: 1;
  }

  58% {
    opacity: 0.45;
  }

  84% {
    transform: translateX(calc(100% - 42px));
    opacity: 0;
  }

  100% {
    transform: translateX(calc(100% - 42px));
    opacity: 0;
  }
}

.stats-text {
  margin-top: 14px;
  font-size: 15px;
  opacity: 0.94;
  line-height: 1.5;
}

.stats-steps {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.stats-step {
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  color: white;
  font-size: 13px;
  font-weight: 700;
  backdrop-filter: blur(8px);
}

.stats-note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.88);
  font-size: 13px;
  line-height: 1.45;
}

.card {
  background: rgba(255, 255, 255, 0.84);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(131, 212, 241, 0.2);
  backdrop-filter: blur(16px);
  padding: 24px;
  animation: surfaceIn 0.42s ease both;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.test-editor-header {
  align-items: flex-end;
}

.test-editor-header .button-primary {
  min-width: 150px;
  margin-bottom: 4px;
}

.card-title {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.course-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.course-access-hidden {
  display: none !important;
}

.card-subtitle {
  margin: 6px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.5;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.course-card,
.lesson-card,
.result-card {
  border-radius: var(--radius-md);
  padding: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.58), rgba(244, 251, 253, 0.94)),
    var(--color-bg-soft);
  border: 1px solid rgba(47, 144, 216, 0.11);
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease, background 0.28s ease;
}

.course-card {
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(244, 251, 253, 0.16)),
    url("image/course-card-bg.png") center / cover no-repeat,
    var(--color-bg-soft);
}

.lesson-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.44), rgba(247, 252, 255, 0.72)),
    url("image/lesson-card-bg.png") center / cover no-repeat,
    var(--color-bg-soft);
}

.course-card .progress {
  margin-top: auto;
}

.course-card:hover,
.lesson-card:hover,
.result-card:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 144, 216, 0.2);
  box-shadow: 0 18px 38px rgba(35, 118, 145, 0.1);
}

.course-title,
.lesson-title {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
}

.course-title-link,
.lesson-title-link {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  text-align: left;
  cursor: pointer;
}

.course-title-link:hover,
.course-title-link:focus-visible,
.lesson-title-link:hover,
.lesson-title-link:focus-visible {
  color: var(--color-blue);
}

.course-title-link:focus-visible,
.lesson-title-link:focus-visible {
  outline: 3px solid rgba(107, 183, 255, 0.34);
  outline-offset: 4px;
  border-radius: 10px;
}

.lesson-card-top {
  min-height: 40px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.course-card > .lesson-card-top {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: 16px;
}

.course-card > .lesson-card-top > .badge,
.course-card > .lesson-card-top > .lesson-edit-button {
  width: 100%;
  min-width: 0;
  justify-content: center;
  text-align: center;
}

.lesson-view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.lesson-view-toggle {
  display: inline-flex;
  padding: 4px;
  border-radius: 16px;
  background: rgba(47, 128, 237, 0.08);
  border: 1px solid rgba(47, 128, 237, 0.12);
}

.lesson-view-button {
  min-width: 88px;
  border: 0;
  border-radius: 12px;
  padding: 9px 12px;
  background: transparent;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 800;
}

.lesson-view-button.active {
  background: #ffffff;
  color: var(--color-blue);
  box-shadow: 0 8px 20px rgba(47, 128, 237, 0.12);
}

.lesson-view-hidden {
  display: none !important;
}

.lesson-list {
  display: grid;
  gap: 10px;
}

.lesson-list-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 16px;
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(247, 252, 255, 0.76)),
    url("image/lesson-card-bg.png") center / cover no-repeat,
    var(--color-bg-soft);
  border: 1px solid rgba(47, 144, 216, 0.11);
}

.lesson-list-index {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(47, 128, 237, 0.1);
  color: var(--color-blue);
  font-size: 15px;
  font-weight: 900;
}

.lesson-list-content {
  min-width: 0;
}

.lesson-list-actions {
  justify-content: flex-end;
}

.course-meta,
.lesson-meta {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.5;
}

.progress {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: rgba(47, 144, 216, 0.1);
  overflow: hidden;
  margin-top: 16px;
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-turquoise), var(--color-light-blue), var(--color-blue));
  box-shadow: 0 0 18px rgba(47, 144, 216, 0.24);
  transition: width 0.45s ease;
}

.progress-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  color: var(--color-muted);
  font-size: 13px;
}

.course-card-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.lesson-card-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.button {
  border: 0;
  border-radius: 18px;
  padding: 13px 18px;
  font-size: 14px;
  font-weight: 700;
  transition: 0.28s ease;
}

.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--color-turquoise), var(--color-light-blue), var(--color-blue));
  box-shadow: var(--shadow-button);
}

.button-primary:hover {
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.56;
  transform: none;
  box-shadow: none;
}

.button-secondary {
  color: var(--color-blue);
  background: rgba(47, 144, 216, 0.1);
}

.button-secondary:hover {
  background: rgba(47, 128, 237, 0.16);
}

.button-danger {
  color: #d63c3c;
  background: rgba(214, 60, 60, 0.1);
}

.button-danger:hover {
  background: rgba(214, 60, 60, 0.16);
}

.button-light {
  color: var(--color-text);
  background: white;
}

.form {
  display: grid;
  gap: 14px;
}

.form-row {
  display: grid;
  gap: 8px;
}

.label {
  font-size: 13px;
  color: var(--color-muted);
}

.input {
  width: 100%;
  border: 1px solid rgba(47, 128, 237, 0.12);
  background: #ffffff;
  color: var(--color-text);
  border-radius: 18px;
  padding: 14px 16px;
  font-size: 15px;
  outline: none;
  transition: 0.2s ease;
}

.input:focus {
  border-color: rgba(47, 128, 237, 0.45);
  box-shadow: 0 0 0 4px rgba(47, 128, 237, 0.08);
}

.content-editor-section {
  display: grid;
  gap: 16px;
}

.content-editor-course-list,
.content-editor-lessons,
.content-editor-questions,
.content-editor-form,
.content-editor-block {
  display: grid;
  gap: 14px;
}

.content-editor-block[hidden] {
  display: none !important;
}

.content-editor-course {
  display: grid;
  gap: 18px;
}

.content-editor-lesson,
.content-editor-block {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(47, 128, 237, 0.09);
}

.content-editor-lesson {
  display: grid;
  gap: 16px;
}

.lesson-sortable-item {
  position: relative;
  cursor: grab;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
}

.lesson-sortable-item.lesson-dragging {
  opacity: 0.58;
  transform: scale(0.995);
}

.lesson-sortable-item.lesson-drop-target {
  border-color: rgba(47, 128, 237, 0.56);
  box-shadow: inset 0 0 0 3px rgba(47, 128, 237, 0.18), 0 14px 30px rgba(47, 128, 237, 0.14);
}

.lesson-sortable-item.lesson-drop-above,
.lesson-sortable-item.lesson-drop-below {
  border-color: rgba(47, 128, 237, 0.3);
  box-shadow: 0 10px 24px rgba(47, 128, 237, 0.1);
}

.lesson-sortable-item.lesson-drop-above::before,
.lesson-sortable-item.lesson-drop-below::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-turquoise), var(--color-blue));
  box-shadow: 0 0 16px rgba(47, 128, 237, 0.26);
}

.lesson-sortable-item.lesson-drop-above::before {
  top: -3px;
}

.lesson-sortable-item.lesson-drop-below::after {
  bottom: -3px;
}

.lesson-sort-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lesson-sortable-item:active {
  cursor: grabbing;
}

.lesson-sort-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.lesson-sort-actions .button {
  padding: 9px 12px;
  border-radius: 14px;
}

.content-editor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 0.34fr);
  gap: 14px;
  align-items: end;
}

.content-editor-actions {
  display: flex;
  align-items: end;
  gap: 10px;
  flex-wrap: wrap;
}

.courses-header-actions {
  flex: 0 0 auto;
  justify-content: flex-end;
  align-items: center;
  min-width: max-content;
  margin-top: 16px;
}

.content-editor-save-row {
  justify-content: flex-end;
}

.content-editor-small-field {
  width: 160px;
}

.content-editor-textarea {
  min-height: 92px;
  resize: vertical;
  line-height: 1.5;
}

.content-editor-file {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.file-picker-button {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  padding: 13px 18px;
  color: var(--color-blue);
  background: rgba(47, 144, 216, 0.1);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.28s ease;
}

.file-picker-button:hover {
  background: rgba(47, 128, 237, 0.16);
}

.content-editor-file:focus-visible + .file-picker-button,
.file-picker-button:focus-visible {
  outline: 3px solid rgba(107, 183, 255, 0.34);
  outline-offset: 3px;
}

.content-editor-note {
  display: block;
  margin-top: 7px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.4;
}

.rutube-video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border: 1px solid rgba(47, 128, 237, 0.12);
  border-radius: 14px;
  background: rgba(247, 252, 255, 0.94);
  color: var(--color-text);
  font-size: 13px;
  line-height: 1.35;
}

.rutube-video-meta[hidden] {
  display: none;
}

.rutube-video-meta-image {
  width: 112px;
  aspect-ratio: 16 / 9;
  flex: 0 0 auto;
  object-fit: cover;
  border-radius: 10px;
  background: #10202b;
}

.rutube-video-meta-body {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.rutube-video-meta-label {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
}

.rutube-video-meta-body strong {
  overflow-wrap: anywhere;
}

.rutube-video-meta-warning {
  border-color: rgba(214, 60, 60, 0.34);
  background: rgba(214, 60, 60, 0.08);
}

.rutube-video-meta-warning-text {
  color: #b42a2a;
  font-weight: 800;
}

.content-editor-title {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0;
}

.course-question-title {
  font-size: 22px;
  font-weight: 900;
  color: var(--color-text);
}

.content-editor-check {
  min-height: 49px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid rgba(47, 128, 237, 0.12);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 700;
}

.content-editor-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-blue);
}

.course-test-toggle-panel {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 18px 0;
  padding: 16px;
  border: 1px solid rgba(47, 128, 237, 0.14);
  border-radius: 8px;
  background: rgba(239, 248, 255, 0.72);
}

.course-test-toggle {
  flex: 0 0 auto;
  cursor: pointer;
}

.course-test-toggle-input {
  position: absolute;
  width: 1px !important;
  height: 1px !important;
  opacity: 0;
  pointer-events: none;
}

.course-test-toggle-control {
  position: relative;
  width: 42px;
  height: 24px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: #cbd7e5;
  transition: background 160ms ease;
}

.course-test-toggle-control::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 2px 5px rgba(24, 46, 72, 0.2);
  content: "";
  transition: transform 160ms ease;
}

.course-test-toggle-input:checked + .course-test-toggle-control {
  background: var(--color-blue);
}

.course-test-toggle-input:checked + .course-test-toggle-control::after {
  transform: translateX(18px);
}

.course-test-toggle-input:focus-visible + .course-test-toggle-control {
  outline: 3px solid rgba(47, 128, 237, 0.22);
  outline-offset: 2px;
}

.course-test-toggle-panel .course-meta {
  margin: 0;
}

@media (max-width: 720px) {
  .course-test-toggle-panel {
    align-items: stretch;
    flex-direction: column;
  }
}

.notification-form {
  display: grid;
  gap: 20px;
}

.notification-management-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 76px;
  margin-bottom: 18px;
  padding: 14px 18px;
}

.notification-management-block .course-meta {
  margin-top: 3px;
}

.notification-management-block .course-title {
  font-size: 18px;
}

.notification-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(17, 35, 51, 0.42);
  backdrop-filter: blur(4px);
}

.notification-modal {
  width: min(820px, 100%);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 24px;
  border: 1px solid rgba(47, 128, 237, 0.16);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 24px 70px rgba(16, 32, 43, 0.24);
}

.notification-modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.notification-modal-close {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border: 0;
  border-radius: 50%;
  background: rgba(231, 240, 248, 0.9);
  color: var(--color-text);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.notification-modal-close:hover,
.notification-modal-close:focus-visible {
  background: rgba(211, 230, 245, 1);
}

.notification-message {
  min-height: 180px;
}

.notification-portals {
  display: grid;
  gap: 14px;
  padding-top: 4px;
}

.notification-portals-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.notification-portal-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  overflow: hidden;
  border: 1px solid rgba(47, 128, 237, 0.14);
  border-radius: 8px;
  background: #ffffff;
}

.notification-portal-option {
  min-height: 64px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 0;
  border-bottom: 1px solid rgba(47, 128, 237, 0.1);
  background: #ffffff;
  cursor: pointer;
}

.notification-portal-option:last-child {
  border-bottom: 0;
}

.notification-portal-option:hover:not(.disabled) {
  background: rgba(239, 248, 255, 0.7);
}

.notification-portal-option.disabled {
  opacity: 0.58;
  cursor: default;
}

.notification-portal-option input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-blue);
}

.notification-portal-copy {
  min-width: 0;
  display: grid;
  gap: 3px;
}

.notification-portal-copy strong,
.notification-portal-copy span {
  overflow-wrap: anywhere;
}

.notification-portal-copy span {
  color: var(--color-muted);
  font-size: 13px;
}

.notification-status {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid rgba(47, 128, 237, 0.15);
  border-radius: 8px;
  background: rgba(239, 248, 255, 0.75);
}

.notification-status.success {
  border-color: rgba(27, 178, 151, 0.28);
  background: rgba(226, 249, 245, 0.72);
}

.notification-status.error {
  border-color: rgba(218, 73, 73, 0.25);
  background: rgba(255, 239, 239, 0.78);
}

.notification-result-list {
  display: grid;
  gap: 4px;
  color: var(--color-muted);
  font-size: 13px;
}

.lesson-update-mode {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid rgba(47, 128, 237, 0.14);
  border-radius: 8px;
  background: rgba(239, 248, 255, 0.64);
}

.lesson-update-mode-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lesson-update-mode-header .course-meta {
  margin-top: 4px;
}

.lesson-update-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: flex-start;
  gap: 12px;
  padding: 13px 14px;
  border: 1px solid rgba(47, 128, 237, 0.12);
  border-radius: 8px;
  background: #ffffff;
  cursor: pointer;
}

.lesson-update-option:has(input:checked) {
  border-color: rgba(47, 128, 237, 0.42);
  background: rgba(237, 247, 255, 0.92);
}

.lesson-update-option input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-blue);
}

.lesson-update-option span {
  display: grid;
  gap: 4px;
}

.lesson-update-option small {
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.45;
}

.management-portal-list {
  display: grid;
  overflow: hidden;
  border: 1px solid rgba(47, 128, 237, 0.14);
  border-radius: 8px;
  background: #ffffff;
}

.management-portal-item + .management-portal-item {
  border-top: 1px solid rgba(47, 128, 237, 0.1);
}

.management-portal-row {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: #ffffff;
}

.management-portal-row:hover,
.management-portal-item.open .management-portal-row {
  background: rgba(239, 248, 255, 0.72);
}

.management-portal-copy {
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  justify-items: start;
  gap: 4px;
}

.management-portal-title-input {
  width: min(420px, 100%);
  padding: 0;
  border: 0;
  border-bottom: 1px solid transparent;
  outline: none;
  background: transparent;
  color: var(--color-text);
  font: inherit;
  font-weight: 700;
}

.management-portal-title-input:hover,
.management-portal-title-input:focus {
  border-bottom-color: rgba(47, 128, 237, 0.38);
}

.management-portal-title-input:disabled {
  opacity: 0.65;
}

.management-portal-link {
  color: var(--color-muted);
  font-size: 13px;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.management-portal-link:hover,
.management-portal-link:focus-visible {
  color: var(--color-blue);
  text-decoration: underline;
}

.management-portal-toggle {
  flex: 0 0 auto;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.management-portal-chevron {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(220, 238, 252, 0.8);
  color: var(--color-blue);
  font-size: 22px;
}

.management-portal-users {
  padding: 0 16px 16px;
  background: rgba(247, 251, 254, 0.68);
}

.management-portal-state {
  padding: 18px;
  color: var(--color-muted);
}

.management-portal-state.error {
  color: #c83c3c;
}

.management-portal-role-select {
  width: 190px;
  max-width: 100%;
  min-width: 0;
  padding: 9px 28px 9px 10px;
  border-radius: 8px;
}

@media (max-width: 760px) {
  .notification-management-block {
    align-items: stretch;
    flex-direction: column;
  }

  .notification-modal-backdrop {
    align-items: end;
    padding: 10px;
  }

  .notification-modal {
    max-height: calc(100vh - 20px);
    padding: 18px;
  }

  .notification-portals-header {
    align-items: stretch;
    flex-direction: column;
  }

  .notification-portal-option {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .notification-portal-option .badge {
    grid-column: 2;
    justify-self: start;
  }
}

.access-user-grid {
  display: grid;
  gap: 10px;
}

.access-user-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 14px;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid rgba(47, 128, 237, 0.1);
  cursor: pointer;
}

.access-user-option-all {
  border-color: rgba(47, 128, 237, 0.2);
  background: rgba(47, 144, 216, 0.08);
}

.access-user-option input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-blue);
}

.access-user-option span {
  display: grid;
  gap: 3px;
}

.access-user-option small {
  color: var(--color-muted);
  font-size: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.badge-green {
  background: rgba(22, 184, 176, 0.12);
  color: var(--color-turquoise);
}

.badge-blue {
  background: rgba(47, 144, 216, 0.12);
  color: var(--color-blue);
}

.badge-gray {
  background: rgba(16, 32, 43, 0.07);
  color: var(--color-muted);
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.45);
}

.table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

.table th,
.table td {
  padding: 15px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(47, 144, 216, 0.08);
  font-size: 14px;
}

.table th {
  color: var(--color-muted);
  font-weight: 700;
  background: rgba(244, 251, 253, 0.9);
}

.table th[data-tooltip] {
  cursor: help;
  position: relative;
}

.table-tooltip {
  position: fixed;
  z-index: 9999;
  max-width: 260px;
  padding: 10px 12px;
  border: 1px solid rgba(47, 128, 237, 0.16);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 14px 34px rgba(16, 32, 43, 0.14);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.35;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: 0.18s ease;
  pointer-events: none;
}

.table-tooltip.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.table td {
  color: var(--color-text);
}

.management-users-table-wrap {
  overflow-x: hidden;
}

.management-users-table {
  width: 100%;
  table-layout: fixed;
}

.management-users-table th,
.management-users-table td {
  white-space: normal;
  word-break: break-word;
}

.management-users-table th:nth-child(1),
.management-users-table td:nth-child(1) {
  width: 33.333%;
}

.management-users-table th:nth-child(2),
.management-users-table td:nth-child(2) {
  width: 33.333%;
  text-align: center;
}

.management-users-table th:nth-child(3),
.management-users-table td:nth-child(3) {
  width: 33.333%;
  text-align: left;
  padding-left: 168px;
}

.management-users-table td:nth-child(3) .input {
  text-align: left;
}

.table tbody tr {
  transition: background 0.16s ease;
}

.table tbody tr:hover {
  background: rgba(107, 183, 255, 0.08);
}

.table .nav-button {
  transition: color 0.16s ease, transform 0.16s ease;
}

.table .nav-button:hover {
  transform: translateX(2px);
}

.analytics-table th,
.analytics-table td {
  text-align: center;
}

.analytics-table th:first-child,
.analytics-table td:first-child {
  text-align: left;
}

.analytics-table th:nth-child(n + 2),
.analytics-table td:nth-child(n + 2) {
  text-align: center;
}

.analytics-table tbody td:not(:first-child) {
  font-size: 16px;
  font-weight: 700;
}

.analytics-table tbody td:first-child {
  font-size: 15px;
}

.analytics-user-link {
  padding: 0;
  color: var(--color-text);
  font: inherit;
  font-weight: 700;
  text-align: left;
}

.analytics-user-link:hover,
.analytics-user-link:focus-visible {
  color: var(--color-blue);
}

.analytics-user-course-details {
  margin-top: 18px;
}

@keyframes surfaceIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Аналитика — раскрывающийся блок под строкой */

.analytics-table .analytics-row-opened td {
  background: #f7fcff;
  border-bottom-color: rgba(47, 128, 237, 0.08);
}

.analytics-detail-row td {
  padding: 0 18px 26px;
  background: linear-gradient(180deg, #f7fcff 0%, rgba(247, 252, 255, 0) 100%);
  border-bottom: 1px solid rgba(16, 32, 43, 0.07);
}

.analytics-detail-panel {
  margin: 0 auto 8px;
  padding: 30px;
  border-radius: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #f2fbff 100%);
  border: 1px solid rgba(47, 128, 237, 0.1);
  box-shadow: 0 22px 55px rgba(16, 32, 43, 0.09);
  animation: analyticsSlideDown 0.28s ease both;
  transform-origin: top;
}

@keyframes analyticsSlideDown {
  0% {
    opacity: 0;
    transform: translateY(-10px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.analytics-detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(47, 128, 237, 0.08);
}

.analytics-detail-title {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0;
}

.analytics-detail-subtitle {
  margin: 6px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.5;
}

.analytics-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.analytics-summary-card {
  min-height: 144px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 12px;
  padding: 22px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(47, 128, 237, 0.09);
}

.analytics-summary-card strong {
  display: block;
  margin-top: 4px;
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0;
}

.analytics-summary-card span:last-child {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.45;
}

.analytics-course-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.analytics-course-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  min-height: 232px;
  padding: 24px;
  border-radius: 22px;
  background: #ffffff;
  border: 1px solid rgba(47, 128, 237, 0.1);
  box-shadow: 0 12px 28px rgba(16, 32, 43, 0.05);
}

.analytics-course-card h4 {
  margin: 16px 0 12px;
  font-size: 18px;
  letter-spacing: 0;
}

.analytics-course-card p {
  margin: 6px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.45;
}

.analytics-course-result {
  display: grid;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(16, 32, 43, 0.06);
}

.analytics-course-result strong {
  display: block;
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0;
}

.lesson-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 22px;
  align-items: start;
}

.lesson-video {
  position: relative;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
  padding: 28px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(24, 184, 168, 0.88), rgba(47, 128, 237, 0.92)),
    #2f80ed;
  color: white;
  box-shadow: var(--shadow-soft);
}

.lesson-video:has(.lesson-video-player) {
  min-height: 0;
  padding: 0;
  overflow: hidden;
  background: #10202b;
}

.lesson-video:fullscreen {
  width: 100vw;
  height: 100vh;
  padding: 0;
  border-radius: 0;
  background: #000;
  justify-content: center;
}

.lesson-video:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  padding: 0;
  border-radius: 0;
  background: #000;
  justify-content: center;
}

.lesson-video:fullscreen .lesson-video-player {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  border-radius: 0;
}

.lesson-video:-webkit-full-screen .lesson-video-player {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  border-radius: 0;
}

.video-expanded-lock {
  overflow: hidden;
}

.video-expanded-lock .card {
  animation: none !important;
  backdrop-filter: none !important;
  transform: none !important;
}

.lesson-video.lesson-video-expanded {
  position: fixed;
  inset: 0;
  z-index: 10000;
  width: 100vw;
  height: 100vh;
  min-height: 100vh;
  padding: 0;
  aspect-ratio: auto;
  border-radius: 0;
  background: #000;
  transform: none;
}

.lesson-video.lesson-video-expanded .lesson-video-player {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  border-radius: 0;
}

.lesson-video-fullscreen {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 3;
  border: 0;
  border-radius: 999px;
  padding: 9px 13px;
  background: rgba(16, 32, 43, 0.78);
  color: #ffffff;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.18);
}

.lesson-video-fullscreen:hover,
.lesson-video-fullscreen:focus-visible {
  background: rgba(16, 32, 43, 0.92);
  outline: 2px solid rgba(255, 255, 255, 0.72);
  outline-offset: 2px;
}

.lesson-video-placeholder {
  display: flex;
  min-height: 264px;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
}

.lesson-video-label {
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  font-size: 13px;
  font-weight: 700;
}

.lesson-video-title {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0;
}

.lesson-video-text {
  max-width: 520px;
  color: rgba(255, 255, 255, 0.86);
  line-height: 1.55;
}

.lesson-video-link {
  color: #ffffff;
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.lesson-video-player {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  border: 0;
  border-radius: var(--radius-lg);
  background: #10202b;
}

.lesson-video-cover {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  gap: 12px;
  place-items: center;
  align-content: center;
  border: 0;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 28% 22%, rgba(24, 184, 168, 0.28), transparent 34%),
    linear-gradient(135deg, rgba(16, 32, 43, 0.24), rgba(16, 32, 43, 0.7)),
    #10202b;
  background-position: center;
  background-size: cover;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.lesson-video-cover:hover,
.lesson-video-cover:focus-visible {
  opacity: 0.94;
}

.lesson-video-cover-play {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--color-blue);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 16px 36px rgba(16, 32, 43, 0.28);
  font-size: 28px;
  line-height: 1;
  padding-left: 4px;
}

.lesson-video-cover-title {
  max-width: min(82%, 520px);
  color: #ffffff;
  font-size: 22px;
  font-weight: 900;
  line-height: 1.25;
  text-align: center;
  text-shadow: 0 3px 14px rgba(16, 32, 43, 0.55);
}

.lesson-video-cover-text {
  color: #ffffff;
  font-size: 15px;
  font-weight: 800;
  text-shadow: 0 2px 10px rgba(16, 32, 43, 0.45);
}

.lesson-video-status {
  position: absolute;
  left: 18px;
  bottom: 18px;
  z-index: 2;
  max-width: calc(100% - 36px);
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(16, 32, 43, 0.78);
  color: #ffffff;
  font-size: 13px;
  font-weight: 800;
}

.lesson-video-status-error {
  border-radius: 10px;
  background: rgba(180, 42, 42, 0.88);
}

.lesson-material {
  position: relative;
  padding: 26px;
  padding-top: 72px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-soft);
  border: 1px solid rgba(47, 128, 237, 0.08);
}

.lesson-material-badge {
  position: absolute;
  top: 12px;
  left: 26px;
  white-space: nowrap;
}

.lesson-material p {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
}

.lesson-material p + p {
  margin-top: 16px;
}

.lesson-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.test-question-list {
  display: grid;
  gap: 18px;
}

.test-question-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-soft);
  border: 1px solid rgba(47, 128, 237, 0.08);
}

.test-question-card h3 {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.35;
  letter-spacing: 0;
}

.test-question-title {
  white-space: pre-wrap;
}

.test-question-counter {
  margin: 0 0 10px;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 700;
}

.test-options {
  display: grid;
  gap: 10px;
}

.test-option {
  width: 100%;
  text-align: left;
  border: 1px solid rgba(47, 128, 237, 0.1);
  background: white;
  border-radius: 18px;
  padding: 14px 16px;
  color: var(--color-text);
  font-size: 15px;
  transition: 0.2s ease;
}

.test-option:hover,
.test-option.selected {
  border-color: rgba(47, 128, 237, 0.45);
  background: rgba(47, 128, 237, 0.08);
}

.test-result-panel {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #ffffff 0%, #f2fbff 100%);
  border: 1px solid rgba(47, 128, 237, 0.1);
  box-shadow: var(--shadow-soft);
}

.test-result-panel h3 {
  margin: 16px 0 22px;
  font-size: 44px;
  line-height: 1;
  letter-spacing: 0;
}

.test-result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
}

.test-result-grid div {
  display: grid;
  gap: 8px;
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(47, 128, 237, 0.08);
}

.test-result-grid strong {
  font-size: 18px;
}

.test-result-grid span {
  color: var(--color-muted);
  font-size: 14px;
}

.test-review {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.test-review h4 {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0;
}

.test-review-item {
  display: grid;
  gap: 8px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(214, 60, 60, 0.14);
}

.test-review-item span {
  color: var(--color-muted);
  line-height: 1.45;
}

.empty {
  padding: 28px;
  border-radius: var(--radius-md);
  background: var(--color-bg-soft);
  color: var(--color-muted);
  text-align: center;
}

@media (max-width: 900px) {
  .app {
    padding: 18px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 32px;
  }

  .grid-3,
  .grid-2,
  .analytics-summary-grid,
  .analytics-course-list,
  .content-editor-grid,
  .lesson-layout,
  .test-result-grid {
    grid-template-columns: 1fr;
  }

  .content-editor-small-field {
    width: 100%;
  }

  .analytics-detail-panel {
    margin: 0 8px 6px;
    padding: 18px;
  }

  .analytics-detail-header,
  .lesson-page-header {
    flex-direction: column;
  }

  .lesson-view-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .lesson-view-toggle {
    width: 100%;
  }

  .lesson-view-button {
    flex: 1;
  }

  .lesson-list-item {
    grid-template-columns: 44px minmax(0, 1fr);
    align-items: flex-start;
  }

  .lesson-list-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .lesson-video {
    min-height: 260px;
  }

  .lesson-actions {
    justify-content: flex-start;
  }
}