/* Sổ Tay: hand-written styles for the SSR pages (TL-ADR-03). Learner pages are mobile first (360 px);
   Admin pages widen on desktop (1280 px and up). Body text is 16 px and touch targets are at least 44 px (NFR-21). */
:root {
  --ink: #1f2933;
  --muted: #52606d;
  --surface: #ffffff;
  --background: #f4f5f7;
  --line: #cbd2d9;
  --accent: #1d4ed8;
  --accent-ink: #ffffff;
  --danger: #b42318;
  --info-background: #e6f0ff;
  --alert-background: #fdecea;
  --badge-background: #92400e;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    Arial,
    sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.skip {
  position: absolute;
  left: 0.5rem;
  top: -4rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  color: var(--accent);
}

.skip:focus {
  top: 0.5rem;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
}

.workspace {
  color: var(--muted);
}

.badge {
  padding: 0.125rem 0.5rem;
  border-radius: 0.25rem;
  background: var(--badge-background);
  color: var(--accent-ink);
  font-size: 0.875rem;
  font-weight: 700;
}

.page {
  width: 100%;
  max-width: 36rem;
  margin: 1rem auto;
  padding: 1rem;
  background: var(--surface);
  border-radius: 0.5rem;
}

.admin .page {
  max-width: 64rem;
  margin-top: 1.5rem;
  padding: 1.5rem 2rem;
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.5rem;
  line-height: 1.25;
}

h2 {
  font-size: 1.25rem;
}

a {
  color: var(--accent);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1rem 0;
}

label {
  font-weight: 600;
}

input[type='email'],
input[type='text'] {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--muted);
  border-radius: 0.375rem;
  font: inherit;
  background: var(--surface);
  color: var(--ink);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 0.375rem;
  background: var(--surface);
  color: var(--accent);
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.button.danger {
  border-color: var(--danger);
  color: var(--danger);
}

.button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

.stack .button {
  width: 100%;
}

.info,
.alert {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
}

.info {
  background: var(--info-background);
}

.alert {
  background: var(--alert-background);
  color: var(--danger);
  font-weight: 600;
}

.notice h1 {
  font-size: 1.5rem;
}

.notice h2 {
  font-size: 1.125rem;
}

.owner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.owner-actions h2,
.owner-actions p {
  flex: 1 0 100%;
  margin: 0;
}

.admin-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  padding: 0 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.admin-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cards li,
.panel {
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

.cards h2 {
  margin-top: 0;
}

input[type='file'] {
  min-height: 2.75rem;
  padding: 0.5rem 0;
  font: inherit;
}

input[type='checkbox'] {
  width: 1.25rem;
  height: 1.25rem;
}

fieldset {
  margin: 0;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

.choice {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.75rem;
  min-height: 2.75rem;
}

.muted {
  color: var(--muted);
}

.error-text {
  color: var(--danger);
}

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

th,
td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.button:disabled,
.button.primary:disabled {
  border-color: var(--muted);
  background: var(--background);
  color: var(--muted);
  cursor: not-allowed;
}

dialog {
  max-width: 32rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  color: var(--ink);
}

dialog::backdrop {
  background: rgb(31 41 51 / 60%);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Course editor (TASK-048): one box per lesson and question. */
.item {
  margin: 1rem 0;
}

.item label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0.5rem 0;
}

.item label.choice {
  flex-direction: row;
  align-items: center;
  font-weight: 400;
}

.item .option {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 0 1rem;
}

textarea,
#course-page input[type='text'] {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--muted);
  border-radius: 0.375rem;
  font: inherit;
  background: var(--surface);
  color: var(--ink);
}

#course-page input[type='text'] {
  min-height: 2.75rem;
}

textarea:focus-visible,
input[type='checkbox']:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

.sources {
  margin: 0.5rem 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.sources blockquote {
  margin: 0.25rem 0 0.5rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--line);
}

.text {
  white-space: pre-wrap;
}

/* Learner pages (TASK-049): one column at 360 px, links and answers with a 44 px touch target. */
.learner .cards {
  grid-template-columns: minmax(0, 1fr);
}

.touch-link {
  display: inline-flex;
  align-items: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
}

.lessons {
  margin: 0;
  padding-left: 1.5rem;
}

.lesson-body {
  margin: 1rem 0;
  white-space: pre-line;
}

.option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 2.75rem;
  font-weight: 400;
}

.option input {
  flex: none;
  width: 1.25rem;
  height: 1.25rem;
}

/* Admin member, assign and report pages (TASK-052). */
select,
input[type='date'] {
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--muted);
  border-radius: 0.375rem;
  font: inherit;
  background: var(--surface);
  color: var(--ink);
}

select:focus-visible,
input:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

.table-wrap {
  overflow-x: auto;
}

.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.inline-form {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
}

.error-list {
  margin: 1rem 0;
  padding: 0.75rem 1rem 0.75rem 2rem;
  border-radius: 0.375rem;
  background: var(--alert-background);
  color: var(--danger);
}

.summary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

/* Assistant, account and withdrawal screens (TASK-054). */
.page .actions {
  margin: 1rem 0;
}

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

.thread > li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}

.question {
  margin: 0 0 0.5rem;
  font-weight: 700;
}

textarea {
  resize: vertical;
}

dd {
  margin: 0 0 0.75rem;
}