.source-excerpt {
  background: #f7f7f7;
  padding: 15px;
  border-radius: 12px;
  font-size: 12px;
  line-height: 1.8;
}

.material-file {
  display: block;
  padding: 12px 0;
  font-size: 12px;
}

.course-material-empty {
  text-align: center;
  padding: 35px 15px;
}

.course-material-empty h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.course-material-empty p {
  font-size: 12px;
  color: #888;
  line-height: 1.7;
  margin-bottom: 17px;
}

.course-material-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 0;
  border-bottom: 1px solid #eee;
}

.course-material-row span {
  flex: 1;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.course-material-row small {
  display: block;
  color: #999;
  font-size: 10px;
  margin-top: 5px;
}

.course-material-row:last-child {
  border-bottom: 0;
}

@scope (body[data-design]) {
  .course-material-section {
    margin-top: 28px;
  }
  .course-material-card {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    border-bottom: 1px solid var(--color-line);
    padding: 12px 0;
  }
  .course-material-card > .course-material-row {
    flex: 1;
    margin: 0;
    padding: 0;
    border: 0;
    color: inherit;
    text-decoration: none;
  }
  .course-material-thumb {
    flex: 0 0 34px !important;
    max-width: 34px;
    height: 40px;
    display: grid;
    place-items: center;
    background: var(--color-surface-soft);
    border-radius: 6px;
  }
  .course-material-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .course-material-type {
    font-size: 9px;
  }
  .course-material-state {
    color: var(--color-muted);
    font-size: 11px;
  }
  .course-material-delete {
    background: none;
    border: 0;
    cursor: pointer;
  }
  .course-material-delete img {
    width: 16px;
  }
  .coursework-picker {
    border: 1px dashed #ccc;
    border-radius: 14px;
    padding: 22px;
    margin: 16px 0;
    background: #fafafa;
  }
  .coursework-picker-intro {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .coursework-picker-icon {
    width: 26px;
    height: 32px;
    flex-shrink: 0;
  }
  .coursework-picker-intro p {
    margin-top: 5px;
    font-size: 11px;
    color: var(--color-muted);
  }
  .coursework-picker-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
  }
  .coursework-picker-actions svg {
    width: 16px;
  }
  .coursework-picker-control,
  .materials-file-picker {
    position: relative;
    overflow: hidden;
  }
  .material-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
  }
  .coursework-picker-control:focus-within,
  .materials-file-picker:focus-within {
    outline: 2px solid var(--color-focus);
    outline-offset: 3px;
  }
  .coursework-picker-formats,
  .coursework-picker-folder-help {
    font-size: 10px;
    color: var(--color-muted);
    margin: 5px 0;
    line-height: 1.6;
  }
  .selected-files {
    font-size: 11px;
    line-height: 1.6;
  }
  .selected-files li {
    margin-top: 8px;
  }
  .material-search {
    display: flex;
    gap: 8px;
    margin: 24px 0;
  }
  .material-search-result {
    display: grid;
    gap: 8px;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-line);
    text-decoration: none;
  }
  .material-search-result span {
    color: var(--color-muted);
  }
  .library-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
  }
  .onboarding-material-grid {
    display: grid;
    gap: 14px;
  }
  @media (max-width: 640px) {
    .coursework-picker {
      padding: 18px;
    }
  }
  .course-context-material-list {
    display: block;
  }
  .course-context-materials-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 9px;
  }
  .course-context-materials .course-context-materials-heading h3 {
    margin: 0;
  }
  .course-context-materials-heading > span {
    font-size: 10px;
    color: #aaa;
  }
  .course-study-title h2,
  .course-materials-heading h2 {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.35;
  }
  .course-page .course-material-section {
    margin-top: 25px;
    padding: 18px;
    border: 1px solid #e5e5e5;
    border-radius: 16px;
    background: var(--color-surface);
    box-shadow: 0 2px 8px #00000005;
  }
  .course-materials-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 13px;
  }
  .course-materials-heading-copy .course-section-eyebrow {
    margin-bottom: 4px;
  }
  .course-materials-heading-actions {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .course-material-count {
    color: #888;
    font-size: 10px;
    white-space: nowrap;
  }
  .course-materials-heading .subtle-link {
    margin: 0;
    color: #555;
    font-size: 10px;
  }
  .course-material-library {
    overflow: hidden;
    border: 1px solid #e8e8e8;
    border-radius: 12px;
    background: #fff;
  }
  .course-material-list {
    display: block;
  }
  .course-material-card {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 74px;
    padding: 10px 13px;
    border-bottom: 1px solid #eee;
  }
  .course-material-card:last-child {
    border-bottom: 0;
  }
  .course-material-card > .course-material-row {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    padding: 0;
    border: 0;
    color: inherit;
    text-decoration: none;
  }
  .course-material-row:hover .course-material-copy strong {
    color: #343434;
    text-decoration: underline;
    text-underline-offset: 2px;
  }
  .course-material-thumb {
    display: grid;
    flex: 0 0 44px !important;
    width: 44px;
    height: 50px;
    max-width: none;
    overflow: hidden;
    place-items: center;
    border: 1px solid #e8e8e8;
    border-radius: 7px;
    background: #f5f5f5;
  }
  .course-material-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .course-material-type {
    color: #737373;
    font-size: 8px;
    font-weight: 700;
    letter-spacing: 0.02em;
  }
  .course-material-copy {
    display: grid;
    min-width: 0;
    gap: 4px;
  }
  .course-material-copy strong {
    overflow: hidden;
    margin: 0;
    color: #333;
    font-size: 11px;
    font-weight: 550;
    line-height: 1.4;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .course-material-copy small {
    color: #929292;
    font-size: 9px;
    line-height: 1.4;
  }
  .course-material-state {
    position: static;
    transform: none;
    flex: 0 0 auto;
    margin-left: auto;
    color: #777;
    font-size: 9px;
  }
  .course-material-state .material-loader {
    width: 14px;
    height: 14px;
    margin: 0 auto 3px;
    border-width: 2px;
  }
  .course-materials-empty {
    padding: 16px;
    color: #888;
    font-size: 10px;
  }
  .course-page .coursework-picker {
    margin: 12px 0 0;
    padding: 13px 15px;
    border: 1px dashed #d8d8d8;
    border-radius: 12px;
    background: #fafafa;
  }
  .course-page .coursework-picker-icon {
    width: 22px;
    height: 25px;
  }
  .course-page .coursework-picker-intro {
    gap: 10px;
  }
  .course-page .coursework-picker-intro strong {
    font-size: 11px;
    font-weight: 600;
  }
  .course-page .coursework-picker-intro p {
    margin-top: 3px;
    font-size: 10px;
  }
  .course-page .coursework-picker-actions {
    gap: 7px;
    margin: 10px 0 7px;
  }
  .course-page .coursework-picker-actions .button {
    min-height: 29px;
    padding: 0 10px;
    border-radius: 8px;
    font-size: 10px;
  }
  .course-page .coursework-picker-formats,
  .course-page .coursework-picker-folder-help {
    margin: 3px 0;
    font-size: 9px;
    line-height: 1.5;
  }
  .course-page .coursework-picker-folder-help {
    border-top: 0;
    padding-top: 0;
  }
  @media (max-width: 760px) {
    .course-page .course-material-section {
      padding: 15px;
    }
  }
  @media (max-width: 520px) {
    .course-materials-heading {
      align-items: flex-start;
    }
    .course-materials-heading-actions {
      gap: 8px;
    }
    .course-materials-heading h2 {
      font-size: 14px;
    }
    .course-material-card {
      gap: 9px;
      padding-inline: 9px;
    }
    .course-material-thumb {
      flex-basis: 38px !important;
      width: 38px;
      height: 44px;
    }
    .course-material-card > .course-material-row {
      gap: 9px;
    }
    .course-material-copy strong {
      font-size: 10px;
    }
  }
}

.materials-page {
  padding-top: 26px;
  padding-bottom: 36px;
}

.materials-page-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 22px;
}

.materials-page-heading h1 {
  margin: 0;
  font-size: 25px;
  font-weight: 550;
}

.materials-page-heading p {
  color: #999;
  font-size: 11px;
}

.materials-upload-actions {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0;
}

.materials-upload-actions .materials-file-picker {
  display: inline-flex;
  margin: 0;
  font-size: 11px;
  white-space: nowrap;
  cursor: pointer;
}

.materials-upload-actions .materials-file-picker svg {
  flex-shrink: 0;
}

.materials-search {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 20px;
}

.materials-search-input {
  display: flex;
  align-items: center;
  gap: 9px;
  width: min(100%, 340px);
  min-width: 0;
  padding: 0 11px;
  border: 1px solid #e8e8e8;
  border-radius: 9px;
  background: #fafafa;
  color: #a0a0a0;
}

.materials-search-input:focus-within {
  border-color: #b7c6d1;
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.materials-search-input > svg {
  flex-shrink: 0;
}

.materials-page .materials-search input[type="search"] {
  width: 100%;
  min-width: 0;
  min-height: 35px;
  margin: 0;
  padding: 7px 0;
  border: 0;
  outline: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  font-size: 11px;
}

.materials-search > .btn {
  height: 35px;
  font-size: 11px;
}

.materials-clear-search {
  color: #888;
  font-size: 10px;
  text-decoration: none;
  text-underline-offset: 3px;
}

.materials-clear-search:hover {
  text-decoration: underline;
}

.materials-library {
  display: block;
}

.materials-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  text-align: left;
}

.materials-table .materials-type-column {
  width: 70px;
}

.materials-table .materials-size-column {
  width: 90px;
}

.materials-table .materials-action-column {
  width: 40px;
}

.materials-table th {
  padding: 10px 12px;
  border-bottom: 1px solid #e8e8e8;
  color: #999;
  font-size: 10px;
  font-weight: 400;
}

.materials-table td {
  padding: 17px 12px;
  border-bottom: 1px solid #f0f0f0;
  vertical-align: middle;
}

.materials-table :is(th, td):first-child {
  padding-left: 0;
}

.materials-table :is(th, td):last-child {
  padding-right: 0;
}

.materials-table .materials-name {
  display: block;
  width: fit-content;
  max-width: 100%;
  color: #4c4c4c;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  text-decoration: none;
  overflow-wrap: anywhere;
  text-underline-offset: 3px;
}

.materials-table .materials-name:hover {
  color: #222;
  text-decoration: underline;
}

.materials-table .materials-type {
  color: #9c9c9c;
  font-size: 9px;
}

.materials-table .materials-size {
  color: #999;
  font-size: 10px;
  text-align: right;
  white-space: nowrap;
}

.materials-table .materials-action {
  text-align: right;
}

.materials-action > form {
  display: inline-block;
  margin: 0;
}

.materials-delete {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  border-radius: 7px;
  background: none;
  color: #aaa;
  cursor: pointer;
}

.materials-delete:hover {
  background: #f9eeee;
  color: #ad5959;
}

.materials-file-status {
  display: block;
  margin-top: 4px;
  color: #999;
  font-size: 10px;
}

.materials-file-status.is-error {
  color: #a56558;
}

.materials-empty {
  padding: 28px 0;
  color: #999;
  font-size: 11px;
  line-height: 1.7;
}

.materials-empty h2 {
  margin-bottom: 6px;
  color: #666;
  font-size: 14px;
  font-weight: 500;
}

.materials-result-count {
  margin: 0 0 4px;
  color: #999;
  font-size: 10px;
}

.materials-result {
  display: block;
  max-width: 85ch;
  padding: 18px 0;
  border-bottom: 1px solid #eee;
  color: #555;
  text-decoration: none;
}

.materials-result-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  line-height: 1.6;
}

.materials-result-heading small {
  flex-shrink: 0;
  color: #aaa;
  font-size: 10px;
}

.materials-result p {
  margin-top: 7px;
  color: #999;
  font-size: 11px;
  line-height: 1.7;
}

.materials-result:hover .materials-result-heading > span {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.materials-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .materials-page {
    padding-top: 20px;
  }
  .materials-page-heading {
    margin-bottom: 18px;
  }
  .materials-upload-actions {
    gap: 5px;
  }
  .materials-upload-actions .materials-file-picker {
    gap: 5px;
    padding-inline: 9px;
    font-size: 10px;
  }
  .materials-upload-actions .materials-file-picker svg {
    width: 12px;
    height: 12px;
  }
  .materials-search {
    gap: 7px;
  }
  .materials-search-input {
    flex: 1;
  }
  .materials-page .materials-search input[type="search"] {
    font-size: 16px;
  }
  .materials-table .materials-type-column {
    width: 48px;
  }
  .materials-table .materials-size-column,
  .materials-table .materials-size {
    display: none;
  }
  .materials-table td,
  .materials-table th {
    padding-inline: 7px;
  }
  .materials-table .materials-name {
    font-size: 11px;
  }
  .materials-table .materials-type {
    font-size: 8px;
  }
}

/* Keep material upload controls clear of the rounded workspace border. */
.app .topbar:has(+ .materials-page) {
  height: 56px;
  padding-top: 12px;
}

@media (max-width: 640px) {
  .app .topbar:has(+ .materials-page) {
    height: calc(66px + env(safe-area-inset-top, 0px));
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
  }
}

/* Material selection */
/* Shared folder-selection feedback, including the onboarding upload step. */
@scope (body[data-design]) {
  .folder-notice {
    width: min(440px, calc(100% - 32px));
    max-height: calc(100dvh - 32px);
    margin: auto;
    padding: 28px;
    overflow-y: auto;
    border: 1px solid var(--color-line);
    border-radius: 20px;
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: 0 20px 80px #0003;
  }
  .folder-notice::backdrop {
    background: #151b1959;
    backdrop-filter: blur(4px);
  }
  .folder-notice-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 22px;
  }
  .folder-notice-icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: var(--color-surface-soft);
  }
  .folder-notice-close {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--color-muted);
  }
  .folder-notice-close:hover {
    background: var(--color-surface-soft);
    color: var(--color-text);
  }
  .folder-notice .folder-notice-title {
    margin: 0 0 12px;
    font-size: 23px;
    font-weight: 500;
    letter-spacing: -0.6px;
    line-height: 1.25;
  }
  .folder-notice p {
    margin: 0;
    color: var(--color-muted);
    font-size: 13px;
    line-height: 1.7;
  }
  .folder-notice-counts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 24px 0 0;
    padding: 18px;
    border-radius: 12px;
    background: var(--color-surface-soft);
  }
  .folder-notice-counts > div + div {
    border-left: 1px solid var(--color-line);
    padding-left: 16px;
  }
  .folder-notice-counts dt {
    color: var(--color-muted);
    font-size: 11px;
    line-height: 1.5;
  }
  .folder-notice-counts dd {
    margin: 8px 0 0;
    color: var(--color-text);
    font-size: 28px;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
  }
  .folder-notice-actions {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
  }
  .folder-notice-actions .button {
    min-height: 40px;
    padding: 10px 18px;
    border-radius: 10px;
    box-shadow: var(--shadow-button-primary);
  }
  .folder-notice-actions .button.secondary {
    box-shadow: var(--shadow-button-secondary);
  }
  .folder-capacity {
    margin-top: 20px;
    padding: 16px;
    border-radius: 12px;
    background: var(--color-surface-soft);
  }
  .folder-capacity p {
    font-size: 12px;
  }
  .folder-capacity a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    color: var(--color-text);
    font-size: 12px;
    font-weight: 500;
    text-underline-offset: 3px;
  }
  .folder-review-skipped {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--color-line);
    font-size: 12px;
  }
  .folder-review-skipped summary {
    cursor: pointer;
  }
  .folder-review-skipped p {
    margin-top: 12px;
    font-size: 11px;
  }
  .folder-review-skipped ul {
    max-height: 160px;
    overflow-y: auto;
    padding-left: 20px;
    color: var(--color-muted);
    overflow-wrap: anywhere;
    line-height: 1.8;
  }
  @media (max-width: 440px) {
    .folder-notice {
      padding: 24px;
    }
    .folder-notice-actions .button {
      flex: 1;
    }
  }
}

/* Daily study */
/* First value, source checks, and the second-course decision share the app's visual language. */
@scope (body[data-design]) {
  .upload-guidance {
    margin: 20px 0;
    border-block: 1px solid var(--color-line);
    font-size: 12px;
  }
  .upload-guidance summary {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
    cursor: pointer;
    color: var(--color-text);
  }
  .upload-guidance summary::after {
    content: "+";
    margin-left: auto;
    font-size: 16px;
  }
  .upload-guidance[open] summary::after {
    content: "−";
  }
  .upload-guidance > div {
    padding-bottom: 12px;
  }
  .upload-guidance p {
    margin: 0 0 10px;
    color: var(--color-muted);
    line-height: 1.7;
  }
  .lesson-source-check button:focus-visible,
  .upload-guidance summary:focus-visible,
  .lesson-source-check summary:focus-visible {
    outline: 2px solid var(--color-focus);
    outline-offset: 4px;
  }
}