html {
  overflow-y: scroll;
}

body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 2rem;
  color: #1a1a1a;
  background: #fafafa;
  line-height: 1.5;
}

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 1rem;
}

a {
  color: #2563eb;
}

.btn[hidden],
.btn-secondary[hidden] {
  display: none;
}

.btn {
  display: inline-block;
  border: none;
  background: #2563eb;
  color: #fff;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}

.btn:hover {
  background: #1d4ed8;
}

.btn-secondary {
  display: inline-block;
  border: 1px solid #d1d5db;
  background: #fff;
  color: #374151;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn-sm.btn,
.btn-sm.btn-secondary,
.btn-sm.admin-danger-button {
  padding: 0.3rem 0.7rem;
  font-size: 0.85rem;
}

.btn-secondary:hover {
  background: #f3f4f6;
}

@media (max-width: 600px) {
  body {
    padding: 1rem;
  }
}

.error-message {
  color: #b91c1c;
}

.success-message {
  color: #15803d;
}

/* Auth pages: login, signup, forgot/reset password, checkout success */
.auth-page {
  max-width: 400px;
  margin: 4rem auto;
}

.auth-page label {
  display: block;
  margin: 1rem 0;
}

.auth-page input {
  display: block;
  width: 100%;
  max-width: 320px;
  margin-top: 0.3rem;
  padding: 0.4rem;
  font: inherit;
}

@media (max-width: 600px) {
  .auth-page {
    margin: 2rem auto;
  }
}

/* Course catalog */
.page-title,
.page-title-container {
  width: 100%;
  max-width: 1200px;
  margin: 1.5rem auto 1rem;
  padding: 0 2rem;
  box-sizing: border-box;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 2rem;
  box-sizing: border-box;
}

@media (max-width: 900px) {
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .course-grid {
    grid-template-columns: 1fr;
    padding: 0 1rem 1rem;
  }

  .page-title,
  .page-title-container {
    padding: 0 1rem;
  }
}

.course-card {
  display: flex;
  flex-direction: column;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fff;
  text-decoration: none;
  color: inherit;
  overflow: hidden;
}

.course-card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.course-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem;
}

.course-card.enrolled {
  border-color: #2563eb;
}

.course-card.locked-card {
  opacity: 0.85;
}

.course-card h3 {
  margin: 0 0 0.5rem;
}

.course-card-description {
  flex: 1;
  margin: 0 0 1rem;
  color: #4b5563;
  font-size: 0.9rem;
}

.course-card .cta {
  font-weight: 600;
}

.course-card.locked-card .cta {
  border: none;
  background: #2563eb;
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font: inherit;
  cursor: pointer;
  align-self: flex-start;
}

.course-card.locked-card .cta:hover {
  background: #1d4ed8;
}

/* Course detail: sidebar + content layout */
.course-layout {
  display: flex;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  align-items: flex-start;
}

.course-sidebar {
  flex: 0 0 300px;
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  padding-right: 1rem;
}

.sidebar-toggle-button {
  display: none;
  border: none;
  background: none;
  color: inherit;
  font-size: 1.4rem;
  line-height: 1;
  padding: 0;
  cursor: pointer;
}

@media (max-width: 768px) {
  .sidebar-toggle-button {
    display: block;
  }

  .course-layout {
    padding: 0 1rem;
  }

  .course-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    overflow-y: auto;
    background: #fafafa;
    padding: 1.5rem;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    z-index: 20;
  }

  .course-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 15;
  }

  .sidebar-backdrop[hidden] {
    display: none;
  }
}

.course-sidebar-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
  display: block;
  margin-bottom: 0.75rem;
}

.course-sidebar-title {
  font-size: 1.1rem;
  margin: 0 0 1rem;
}

.lesson-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.lesson-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #eee;
}

.lesson-list li.active .lesson-link {
  font-weight: 700;
}

.lesson-list .locked {
  color: #999;
  display: block;
}

.lesson-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.lesson-title {
  flex: 1;
  min-width: 0;
}

.lesson-status {
  flex: 0 0 auto;
  width: 0.8em;
  height: 0.8em;
  border-radius: 50%;
  border: 1.5px solid #bbb;
  background: transparent;
}

.lesson-status.completed {
  background: #16a34a;
  border-color: #16a34a;
}

.lesson-content {
  flex: 1;
  min-width: 0;
}

.lesson-video {
  margin-bottom: 1.5rem;
}

.lesson-video-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.lesson-video-link {
  margin: 0.5rem 0 0;
}

/* Admin layout: sidebar + content */
.admin-layout {
  display: flex;
  gap: 2rem;
}

.admin-sidebar {
  flex: 0 0 200px;
}

.admin-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.admin-sidebar li {
  padding: 0.4rem 0;
}

.admin-sidebar li.active a {
  font-weight: 700;
}

.admin-content {
  flex: 1;
  min-width: 0;
}

.admin-content > * + * {
  margin-top: 1rem;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 0.6rem;
  border-bottom: 1px solid #e5e7eb;
}

.admin-table thead th {
  background: #f3f4f6;
  font-weight: 600;
}

.admin-table th.sortable {
  cursor: pointer;
  user-select: none;
}

.admin-table th.sortable:hover {
  background: #e5e7eb;
}

.admin-table th.sortable .sort-indicator {
  display: inline-block;
  width: 1em;
  color: #6b7280;
}

.admin-danger-zone {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #e5e7eb;
}

.course-edit-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  max-width: 1100px;
}

.course-edit-info {
  flex: 0 0 360px;
}

.course-edit-modules {
  flex: 1;
  min-width: 0;
}

@media (max-width: 700px) {
  .course-edit-layout {
    flex-direction: column;
  }

  .course-edit-info {
    flex: 1 1 auto;
  }
}

.lesson-edit-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  max-width: 1100px;
}

.lesson-edit-info {
  flex: 0 0 320px;
}

.lesson-edit-content {
  flex: 1;
  min-width: 0;
}

.lesson-edit-content textarea {
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 700px) {
  .lesson-edit-layout {
    flex-direction: column;
  }

  .lesson-edit-info {
    flex: 1 1 auto;
  }
}

.admin-danger-button {
  border: 1px solid #dc2626;
  background: #fff;
  color: #dc2626;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font: inherit;
  cursor: pointer;
}

.admin-danger-button:hover {
  background: #fef2f2;
}

.admin-form-inline {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.admin-form-inline label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.admin-form-stacked label {
  display: block;
  margin: 1rem 0;
}

.admin-form-stacked label[hidden] {
  display: none;
}

.admin-form-stacked label > input[type="text"],
.admin-form-stacked label > input[type="number"],
.admin-form-stacked label > input[type="email"],
.admin-form-stacked label > select,
.admin-form-stacked label > textarea {
  display: block;
  margin-top: 0.3rem;
}

.admin-form-stacked input[type="text"],
.admin-form-stacked input[type="number"],
.admin-form-stacked input[type="email"],
.admin-form-stacked select,
.admin-form-stacked textarea,
.admin-text-input {
  width: 100%;
  max-width: 320px;
  padding: 0.4rem;
  font: inherit;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  box-sizing: border-box;
}

.admin-form-stacked fieldset {
  border: 1px solid #ddd;
  border-radius: 6px;
  margin: 1rem 0;
}

.admin-form-stacked fieldset label {
  display: block;
  margin: 0.4rem 0;
}

.course-info-form .field-label,
.membership-info-form .field-label {
  display: block;
  font-weight: 600;
  color: #6b7280;
  font-size: 0.85rem;
}

.course-info-form .field-value,
.membership-info-form .field-value {
  display: block;
  margin-top: 0.1rem;
}

.course-info-form .field-checkbox,
.membership-info-form .field-checkbox {
  display: none;
}

.course-info-form label > input[type="text"],
.course-info-form label > input[type="number"],
.course-info-form label > textarea,
.course-info-form label > select,
.course-info-form input[type="text"],
.course-info-form input[type="number"],
.course-info-form textarea,
.course-info-form select,
.membership-info-form label > input[type="text"],
.membership-info-form label > input[type="number"],
.membership-info-form label > textarea,
.membership-info-form label > select,
.membership-info-form input[type="text"],
.membership-info-form input[type="number"],
.membership-info-form textarea,
.membership-info-form select {
  display: none;
}

.course-info-form.is-editing .field-value,
.membership-info-form.is-editing .field-value {
  display: none;
}

.course-info-form.is-editing .field-checkbox,
.membership-info-form.is-editing .field-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.course-info-form.is-editing label > input[type="text"],
.course-info-form.is-editing label > input[type="number"],
.course-info-form.is-editing label > textarea,
.course-info-form.is-editing label > select,
.course-info-form.is-editing input[type="text"],
.course-info-form.is-editing input[type="number"],
.course-info-form.is-editing textarea,
.course-info-form.is-editing select,
.membership-info-form.is-editing label > input[type="text"],
.membership-info-form.is-editing label > input[type="number"],
.membership-info-form.is-editing label > textarea,
.membership-info-form.is-editing label > select,
.membership-info-form.is-editing input[type="text"],
.membership-info-form.is-editing input[type="number"],
.membership-info-form.is-editing textarea,
.membership-info-form.is-editing select {
  display: block;
}

.admin-form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem 1.5rem;
  margin: 1rem 0;
  max-width: 640px;
  padding: 1.25rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  box-sizing: border-box;
}

.admin-form-grid .field-cell.span-2 {
  grid-column: 1 / -1;
}

.admin-form-grid .field-cell[hidden] {
  display: none;
}

.admin-form-grid .field-label {
  display: block;
  font-weight: 600;
  color: #6b7280;
  font-size: 0.85rem;
}

.admin-form-grid .field-value {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.4rem;
  font: inherit;
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: 6px;
  box-sizing: border-box;
}

.admin-form-grid .field-cell input[type="text"],
.admin-form-grid .field-cell input[type="number"],
.admin-form-grid .field-cell input[type="email"],
.admin-form-grid .field-cell select {
  display: none;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.4rem;
  font: inherit;
  line-height: 1.5;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  box-sizing: border-box;
}

.admin-form-grid .field-radio-group {
  display: none;
  align-items: center;
  gap: 1rem;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.4rem 0;
  border: 1px solid transparent;
  box-sizing: border-box;
  line-height: 1.5;
}

.admin-form-grid fieldset.field-cell {
  border: none;
  margin: 0;
  padding: 0;
}

.admin-form-grid fieldset.field-cell .field-radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-right: 1rem;
  font-weight: normal;
  color: inherit;
}

/* Editing mode: hide static values, show inputs */
.admin-form-grid.is-editing .field-value {
  display: none;
}

.admin-form-grid.is-editing .field-cell input[type="text"],
.admin-form-grid.is-editing .field-cell input[type="number"],
.admin-form-grid.is-editing .field-cell input[type="email"],
.admin-form-grid.is-editing .field-cell select {
  display: block;
}

.admin-form-grid.is-editing .field-radio-group {
  display: flex;
}

.admin-form-grid .admin-form-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

@media (max-width: 700px) {
  .admin-form-grid {
    grid-template-columns: 1fr;
  }
}

.admin-form-inline select {
  padding: 0.45rem 0.6rem;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font: inherit;
  background: #fff;
}

/* Admin lesson list: drag-to-reorder */
.admin-lesson-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.admin-lesson-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-bottom: 0.4rem;
  background: #fff;
  cursor: grab;
}

.admin-lesson-list li.dragging {
  opacity: 0.4;
}

.admin-lesson-list .drag-handle {
  color: #999;
}

.admin-lesson-list a {
  flex: 1;
}

.admin-lesson-list .drip {
  color: #999;
  font-size: 0.85rem;
}

/* Admin: module blocks */
.module-block {
  border: 1px solid #ddd;
  border-radius: 6px;
  margin-bottom: 1rem;
  background: #fff;
  cursor: grab;
}

.module-block.dragging {
  opacity: 0.4;
}

.module-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  border-bottom: 1px solid #eee;
}

.module-block.collapsed .module-header {
  border-bottom: none;
}

.module-block.collapsed .module-lesson-list,
.module-block.collapsed .module-collapsible-control {
  display: none;
}

form.module-delete-control {
  display: none;
}

.module-rename-form.is-editing ~ form.module-delete-control {
  display: inline-flex;
}

.module-block.collapsed .module-delete-control {
  display: none !important;
}

.module-header .drag-handle {
  color: #999;
}

.module-rename-form {
  flex: 1;
  align-items: center;
}

.module-rename-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.module-title-value {
  font-weight: 600;
}

.module-rename-form.is-editing .module-title-value {
  display: none;
}

.module-rename-form.is-editing input[type="text"] {
  display: inline-block;
}

.module-edit-button,
.module-save-button,
.module-cancel-button {
  display: none;
}

.module-rename-form:not(.is-editing) .module-edit-button {
  display: inline-block;
}

.module-rename-form.is-editing .module-save-button,
.module-rename-form.is-editing .module-cancel-button {
  display: inline-block;
}

.module-collapse-toggle {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 1rem;
  color: #6b7280;
  padding: 0.25rem 0.5rem;
}

.inline-form {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
}

.admin-add-module-form {
  display: flex;
  flex-wrap: nowrap;
  margin-bottom: 1.5rem;
}

.admin-add-module-form .admin-text-input {
  flex: 1;
  min-width: 0;
  max-width: none;
}

.admin-add-module-form button {
  flex-shrink: 0;
  white-space: nowrap;
}

.admin-search-bar {
  margin-bottom: 1rem;
}

.admin-search-bar input {
  width: 100%;
  max-width: 400px;
  padding: 0.5rem 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font: inherit;
  box-sizing: border-box;
}

.module-lesson-list {
  margin: 0.5rem;
  min-height: 2.5rem;
}

.module-add-lesson-link {
  display: block;
  margin: 0 0.5rem 0.5rem;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: #fff;
  text-align: center;
}

.module-lesson-list:not(:has(li)) {
  border: 1px dashed #ccc;
  border-radius: 4px;
}

.module-lesson-list:not(:has(li))::after {
  content: "Drag a lesson here";
  display: block;
  padding: 0.6rem;
  color: #999;
  font-size: 0.85rem;
  font-style: italic;
}

/* Course player: dark navbar */
.player-navbar {
  background: #111827;
  color: #f9fafb;
  margin: -2rem -2rem 2rem -2rem;
}

.player-navbar-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
}

.admin-navbar .player-navbar-inner {
  max-width: none;
}

.player-navbar-brand {
  font-weight: 600;
  flex: 1;
  color: inherit;
  text-decoration: none;
}

@media (max-width: 600px) {
  .player-navbar {
    margin: -1rem -1rem 2rem -1rem;
  }

  .player-navbar-inner {
    padding: 1rem;
  }
}

/* Navbar: avatar dropdown */
.navbar-avatar-menu {
  position: relative;
}

.navbar-avatar-button {
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: inherit;
  font: inherit;
}

.navbar-display-name {
  color: inherit;
  font-size: 0.9rem;
}

.navbar-avatar-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

.navbar-avatar-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: #fff;
  color: #1a1a1a;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  list-style: none;
  margin: 0;
  padding: 0.4rem 0;
  min-width: 160px;
  z-index: 10;
}

.navbar-avatar-dropdown li {
  display: block;
}

.navbar-avatar-dropdown a,
.navbar-avatar-dropdown button {
  display: block;
  width: 100%;
  padding: 0.5rem 1rem;
  text-align: left;
  text-decoration: none;
  color: inherit;
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
}

.navbar-avatar-dropdown a:hover,
.navbar-avatar-dropdown button:hover {
  background: #f3f4f6;
}

.navbar-avatar-dropdown form {
  margin: 0;
}

/* Profile page */
.profile-layout {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 0.5rem;
}

.profile-avatar-section {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

@media (max-width: 480px) {
  .profile-avatar-section {
    flex-direction: column;
    align-items: flex-start;
  }
}

.profile-avatar-img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
}

.profile-avatar-note {
  color: #9ca3af;
  font-size: 0.9rem;
}

.profile-info-section {
  margin-bottom: 2rem;
}

.profile-email {
  color: #6b7280;
  margin: 0 0 0.75rem;
}

.profile-name-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.profile-name-display {
  font-weight: 600;
}

.profile-name-edit-btn {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 1rem;
  color: #6b7280;
}

.profile-name-input {
  font: inherit;
  padding: 0.25rem 0.5rem;
}

.profile-courses-section {
  margin-bottom: 2rem;
}

.profile-course-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.profile-course-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid #eee;
}

.profile-course-status {
  color: #6b7280;
  font-size: 0.85rem;
  text-transform: capitalize;
}

/* Course player: progress bar */
.player-progress {
  margin-bottom: 1.5rem;
}

.player-progress-bar {
  height: 8px;
  border-radius: 4px;
  background: #e5e7eb;
  overflow: hidden;
}

.player-progress-fill {
  height: 100%;
  background: #2563eb;
  transition: width 0.2s ease;
}

.player-progress-label {
  font-size: 0.8rem;
  color: #6b7280;
  margin: 0.4rem 0 0;
}

/* Course player: module accordions */
.module-accordion {
  border-bottom: 1px solid #eee;
  margin-bottom: 0.5rem;
}

.module-accordion summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.5rem 0;
  list-style: none;
}

.module-accordion summary::-webkit-details-marker {
  display: none;
}

.module-accordion summary::before {
  content: "\25B8";
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.15s ease;
}

.module-accordion[open] summary::before {
  transform: rotate(90deg);
}


.mark-complete-row {
  margin-top: 1.5rem;
}

/* Public sales page */
.sales-page {
  max-width: 600px;
  margin: 4rem auto;
  padding: 0 1.5rem;
  text-align: center;
}

.sales-description {
  color: #4b5563;
  margin: 1rem 0 2rem;
}

.sales-buy-button {
  font-size: 1.1rem;
  padding: 0.75rem 1.5rem;
}

@media (max-width: 600px) {
  .sales-page {
    margin: 2rem auto;
  }
}

/* Billing details gate */
.billing-gate {
  max-width: 500px;
  margin: 3rem auto;
}

.billing-gate fieldset {
  border: 1px solid #ddd;
  border-radius: 6px;
  margin: 1rem 0;
}

.billing-gate label {
  display: block;
  margin: 1rem 0;
}

.billing-gate label[hidden] {
  display: none;
}

.billing-gate label > input[type="text"],
.billing-gate label > select {
  display: block;
  margin-top: 0.3rem;
}

.billing-gate input[type="text"],
.billing-gate select {
  width: 100%;
  max-width: 320px;
  padding: 0.4rem;
  font: inherit;
}

.billing-gate fieldset label {
  display: block;
  margin: 0.4rem 0;
}

@media (max-width: 600px) {
  .billing-gate {
    margin: 1.5rem auto;
  }
}