/* Shared 2026 visual refresh. Structural and feature-specific rules remain in styles.css. */
:root {
  --font-family-sans: 'Manrope', sans-serif;
  --ink: #111318;
  --muted: #687386;
  --line: #e7ecf3;
  --cream: #f8fafd;
  --paper: #ffffff;
  --peach: #ffe9e3;
  --coral: #f27661;
  --mint: #e6f6ef;
  --green: #2563eb;
  --lav: #f0efff;
  --purple: #6658bf;
  --yellow: #fff4d8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eef4ff;
  --primary-line: #dce8ff;
  --success: #24835f;
  --success-accent: #53b98b;
  --success-soft: #e6f6ef;
  --warning: #8a6416;
  --warning-accent: #f3b43f;
  --warning-soft: #fff4d8;
  --danger: #d85d49;
  --danger-soft: #fff0eb;
  --navy: #10263f;
  --surface-shadow: 0 6px 24px rgba(30, 60, 100, .06);
  --surface-shadow-hover: 0 12px 30px rgba(30, 60, 100, .09);
  font-family: var(--font-family-sans);
  color: var(--ink);
  background: var(--cream);
}

html {
  min-width: 320px;
  background: var(--cream);
}

body {
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-family-sans);
  font-size: 15px;
  line-height: 1.45;
  letter-spacing: -.005em;
  background:
    radial-gradient(circle at 26% 92%, rgba(90, 168, 255, .2), transparent 40%),
    radial-gradient(circle at 90% 84%, rgba(194, 126, 255, .18), transparent 38%),
    radial-gradient(circle at 94% 28%, rgba(242, 118, 97, .1), transparent 32%),
    linear-gradient(145deg, #f5faff 0%, #f5f7ff 50%, #fff4fb 100%);
  background-attachment: fixed;
}

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

.app-shell {
  grid-template-columns: 235px minmax(0, 1fr);
  min-height: 100vh;
  background: transparent;
}

main {
  grid-column: 2;
  min-width: 0;
  background: transparent;
}

.sidebar {
  width: 235px;
  padding: 26px 14px 22px;
  border-right-color: #e8edf4;
  background: rgba(255, 255, 255, .96);
  box-shadow: none;
}

.brand {
  gap: 12px;
  min-height: 48px;
  padding: 0 7px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
}

.brand > span:last-child {
  display: grid;
}

.brand span span {
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
}

.brand-mark,
.app-loading-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  box-shadow: 0 6px 16px rgba(37, 99, 235, .18);
}

#main-nav {
  margin-top: 36px;
}

.nav-link {
  min-height: 52px;
  margin-bottom: 4px;
  padding: 12px 14px;
  border-radius: 12px;
  color: #293449;
  font-size: 14px;
  font-weight: 500;
  transition: color .18s ease, background-color .18s ease, box-shadow .18s ease;
}

.nav-link span {
  width: 30px;
  color: #506079;
  font-size: 19px;
}

.nav-link:hover,
.nav-link.active {
  color: #1d5fd1;
  background: var(--primary-soft);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, .02);
}

.nav-link.active {
  font-weight: 600;
}

.nav-link:hover span,
.nav-link.active span {
  color: var(--primary);
}

.sidebar-bottom .nav-link {
  min-height: 46px;
}

.sign-out {
  min-height: 46px;
  padding: 12px 13px;
  color: #4f5c70;
  font-size: 13px;
  border-radius: 10px;
}

.sign-out:hover {
  color: var(--primary);
  background: #f6f9ff;
}

.nav-profile-avatar,
.avatar,
.mini-avatar,
.student-directory-avatar,
.profile-avatar-preview {
  box-shadow: 0 0 0 1px #e3eaf3;
}

.topbar {
  height: 68px;
  padding-inline: clamp(28px, 4vw, 48px);
  border-bottom-color: #e9edf3;
  background: rgba(255, 255, 255, .84);
  backdrop-filter: blur(14px);
  box-shadow: none;
}

.breadcrumb {
  color: #718097;
  font-size: 13px;
}

.breadcrumb span {
  color: #a7b1c0;
}

.demo-pill {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 11px;
  font-weight: 600;
}

.notification {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
}

.notification:hover {
  background: var(--primary-soft);
}

.notification-panel {
  border-color: var(--line);
  border-radius: 14px;
  box-shadow: 0 18px 48px rgba(30, 60, 100, .14);
}

.view {
  width: 100%;
  max-width: 1360px;
  padding: 44px clamp(32px, 4vw, 48px) 64px;
}

.welcome-row,
.page-title {
  margin-bottom: 30px;
}

.view h1,
.auth-card h1 {
  color: var(--ink);
  font-size: clamp(36px, 3.3vw, 42px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.025em;
}

.view h1 em,
.deadline-card h2 em {
  color: var(--coral);
}

#welcome-name {
  color: var(--primary);
  background: linear-gradient(105deg, #2563eb 0%, #7159dc 54%, #d866b3 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (forced-colors: active) {
  #welcome-name {
    background: none;
    color: Highlight;
    -webkit-text-fill-color: currentColor;
  }
}

.section-heading h2,
.card h2,
.lesson-list-group h2,
.modal h2,
.student-detail-identity h2,
.sticker-progress-summary h3,
.sticker-book-medal h3 {
  color: var(--ink);
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.015em;
}

h3,
h4 {
  color: var(--ink);
  line-height: 1.35;
}

.eyebrow {
  margin-bottom: 9px;
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .075em;
}

.muted,
.modal-hint {
  color: var(--muted);
  line-height: 1.55;
}

.muted {
  font-size: 14px;
}

.card,
.stat,
.lesson-directory,
.lesson-row,
.lesson-card,
.material,
.course-card,
.course-lesson-card,
.task,
.whiteboard-wrap,
.annotation-workspace,
.profile-form,
.student-detail-panel,
.teacher-homework-section,
.teacher-homework-table-wrap,
.sticker-admin-year-card {
  border-color: var(--line);
  background: rgba(255, 255, 255, .96);
  box-shadow: var(--surface-shadow);
}

.card,
.lesson-directory,
.profile-form,
.student-detail-panel,
.teacher-homework-section,
.teacher-homework-table-wrap {
  border-radius: 18px;
}

.card {
  padding: 24px;
}

.stat,
.lesson-row,
.lesson-card,
.material,
.course-card,
.course-lesson-card,
.task {
  border-radius: 14px;
}

.lesson-row:hover,
.lesson-card:hover,
.course-card:hover,
.stat-button:hover {
  border-color: #cfdbeb;
  box-shadow: var(--surface-shadow-hover);
  transform: translateY(-2px);
}

.primary,
.soft,
.danger,
.tool,
.text-button,
.avatar-upload-button {
  font-weight: 600;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.primary {
  min-height: 44px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 11px;
  color: #fff;
  background: var(--primary);
  box-shadow: 0 5px 14px rgba(37, 99, 235, .16);
}

.primary:hover {
  color: #fff;
  background: var(--primary-hover);
  box-shadow: 0 8px 18px rgba(37, 99, 235, .21);
  transform: translateY(-1px);
}

.soft,
.avatar-upload-button {
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid var(--primary-line);
  border-radius: 11px;
  color: var(--primary);
  background: var(--primary-soft);
}

.soft:hover,
.avatar-upload-button:hover {
  color: var(--primary-hover);
  border-color: #c8d9ff;
  background: #e5efff;
}

.text-button,
.back-button,
.material a,
.lesson-card button {
  color: var(--primary);
}

.text-button {
  border-radius: 8px;
  padding: 7px 9px;
}

.text-button:hover,
.back-button:hover {
  color: var(--primary-hover);
  background: #f3f7ff;
}

.danger,
.danger-link,
.danger-icon {
  color: var(--danger) !important;
}

.danger {
  min-height: 44px;
  border-radius: 11px;
  background: var(--danger-soft);
}

.join-lesson,
.save-board {
  color: #fff;
  background: var(--navy);
  border-color: var(--navy);
  box-shadow: 0 5px 14px rgba(16, 38, 63, .15);
}

.join-lesson:hover,
.save-board:hover {
  background: #0b1d32;
  border-color: #0b1d32;
}

input,
select,
textarea,
.search,
.lesson-select select,
.sticker-book-year-select select,
.student-teacher-assignment-form select {
  border: 1px solid #dde4ed;
  border-radius: 11px;
  color: var(--ink);
  background: #fff;
}

input,
select {
  min-height: 44px;
  padding: 10px 12px;
}

.profile-form .avatar-upload-input {
  width: 1px;
  height: 1px;
  min-height: 0;
  padding: 0;
  border: 0;
  clip-path: inset(50%);
}

textarea {
  min-height: 110px;
  padding: 12px;
  line-height: 1.5;
}

input::placeholder,
textarea::placeholder {
  color: #9aa6b7;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(52, 120, 246, .14);
  outline-offset: 2px;
  border-color: #3478f6;
}

.search {
  min-height: 46px;
  display: flex;
  align-items: center;
  padding: 10px 13px;
  color: #8793a6;
}

.search:focus-within {
  border-color: #3478f6;
  box-shadow: 0 0 0 3px rgba(52, 120, 246, .1);
}

.search input {
  min-height: 0;
  height: auto;
  margin-left: 7px;
  padding: 0;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.search input:focus-visible {
  outline: 0;
}

.modal-backdrop {
  background: rgba(15, 29, 50, .36);
  backdrop-filter: blur(5px);
}

.modal {
  padding: 28px;
  border: 1px solid rgba(231, 236, 243, .9);
  border-radius: 20px;
  box-shadow: 0 24px 70px rgba(16, 38, 63, .2);
}

.modal label,
.profile-form > label,
.homework-form label,
.lesson-field > span,
.lesson-field-label {
  color: #39465a;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .025em;
}

.modal input,
.modal select,
.modal textarea {
  border-color: #dde4ed;
  border-radius: 11px;
}

.close-modal,
.close-series-modal,
.close-material-modal,
.close-student-modal,
.close-teacher-modal,
.close-student-course-modal,
.close-course-editor,
.close-course-lesson,
.close-homework-editor,
.close-course-exercise {
  position: absolute;
  top: 12px;
  right: 15px;
  left: auto;
  z-index: 2;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--muted);
  background: #f6f8fb;
}

/* Dashboard and shared data surfaces */
.stats-grid,
.stats-grid.teacher-stats {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 22px;
}

.stat {
  min-height: 84px;
  padding: 18px;
  gap: 14px;
}

.stat-icon,
.material-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
}

.stat strong {
  font-size: 22px;
  font-weight: 700;
}

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

.peach,
.material-icon.pdf {
  color: var(--danger);
  background: var(--danger-soft);
}

.mint,
.material-icon.link {
  color: var(--success);
  background: var(--success-soft);
}

.lavender,
.material-icon.video {
  color: var(--primary);
  background: var(--primary-soft);
}

.teacher-dashboard,
.admin-dashboard {
  margin-top: 22px;
}

.teacher-dashboard-grid {
  grid-template-columns: minmax(0, 1.6fr) minmax(300px, .68fr);
  gap: 20px;
}

.teacher-calendar {
  padding: 24px;
}

.teacher-side-widgets {
  gap: 16px;
}

.teacher-side-widgets .card {
  padding: 20px;
}

.calendar-controls .soft {
  min-width: 40px;
  min-height: 40px;
  padding: 8px 11px;
}

.calendar-weekdays,
.calendar-grid {
  gap: 6px;
}

.calendar-weekdays {
  margin-top: 22px;
  color: #6f7d91;
  font-size: 10px;
}

.calendar-day {
  min-height: 94px;
  padding: 8px;
  border-color: #e4eaf2;
  border-radius: 10px;
  background: rgba(255, 255, 255, .9);
}

.calendar-day:hover {
  border-color: #c9d8ee;
  background: #fbfdff;
}

.calendar-day.today {
  border: 2px solid var(--primary);
  background: var(--primary-soft);
}

.calendar-event {
  padding: 5px 6px;
  border-radius: 6px;
  color: #1d5fd1;
  background: #eaf2ff;
}

.teacher-agenda-row,
.teacher-progress-row,
.admin-overview-grid button {
  padding: 10px;
  border: 1px solid #edf1f6;
  border-radius: 10px;
  background: #f7f9fd;
}

.teacher-progress-row b,
.student-progress-cell,
.course-teacher-progress b {
  color: var(--success);
}

.course-progress-track,
.sticker-level-progress {
  height: 7px;
  background: #e6ecf5;
}

.course-progress-track i,
.sticker-level-progress i {
  background: var(--primary);
}

.course-progress strong {
  color: var(--primary);
}

/* Lesson directory */
#lessons.view.active {
  gap: 20px;
}

#lessons > .page-title {
  margin-bottom: 10px;
}

.lesson-calendar-integration {
  gap: 20px;
}

body.teacher-mode #lessons .lesson-calendar-integration {
  top: 88px;
  padding: 22px;
}

.lesson-directory {
  padding: 22px;
}

.lesson-toolbar {
  gap: 14px;
  padding-bottom: 20px;
}

.lesson-field {
  gap: 7px;
}

.lesson-field select,
.lesson-search {
  min-height: 46px;
}

.lesson-filter-row {
  gap: 7px;
  margin: 15px 0 10px;
}

.filter {
  min-height: 38px;
  padding: 9px 13px;
  border-radius: 9px;
  color: #536176;
  font-size: 12px;
}

.filter.active,
.filter:hover,
.lesson-filter-row .filter.active {
  color: var(--primary);
  border-color: transparent;
  background: var(--primary-soft);
}

.lesson-summary {
  padding-bottom: 18px;
  color: var(--muted);
}

.lesson-list {
  gap: 22px;
}

.lesson-list-group {
  gap: 10px;
}

.lesson-list-group h2 span {
  color: var(--primary);
  background: var(--primary-soft);
}

.lesson-row {
  grid-template-columns: 56px minmax(0, 1fr) auto auto;
  gap: 15px;
  padding: 16px;
}

.lesson-date-badge {
  width: 52px;
  height: 54px;
  border-radius: 12px;
  color: var(--primary);
  background: var(--primary-soft);
}

.lesson-date-badge b {
  font-size: 19px;
}

.lesson-row-title h3 {
  font-size: 16px;
  font-weight: 700;
}

.lesson-row-title p {
  font-size: 12px;
}

.lesson-row-meta {
  margin-left: 0;
  color: #748196;
  font-size: 10px;
}

.status,
.account-status,
.lesson-status,
.time-tag,
.teacher-homework-status,
.exercise-teacher-status,
.meet-generation-status,
.sticker-admin-status {
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  width: max-content;
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
}

.status.active,
.account-status.active,
.lesson-status.upcoming,
.lesson-status.completed,
.meet-generation-status.ready,
.teacher-homework-status.reviewed {
  color: var(--success);
  background: var(--success-soft);
}

.status.invited,
.time-tag,
.meet-generation-status.pending {
  color: var(--warning);
  background: var(--warning-soft);
}

.account-status.inactive,
.lesson-status.cancelled,
.teacher-homework-status.overdue {
  color: var(--danger);
  background: var(--danger-soft);
}

.lesson-status.held {
  color: var(--primary);
  background: var(--primary-soft);
}

/* Lesson detail, whiteboard and annotations */
.lesson-hero.card {
  padding: 24px 28px;
  border-color: #f4ded8;
  border-radius: 18px;
  background: linear-gradient(110deg, #fff1ec, #fff8f5);
  box-shadow: 0 8px 26px rgba(111, 68, 59, .08);
}

.lesson-hero h1 {
  font-size: clamp(28px, 2.6vw, 34px);
}

.lesson-hero-title-row .lesson-meet-summary {
  border: 1px solid #e2e8f0;
  border-radius: 999px;
  background: rgba(255, 255, 255, .9);
}

.lesson-hero-meta dt {
  color: #8a6158;
}

.lesson-description {
  border-top-color: rgba(242, 118, 97, .2);
}

.tabs {
  gap: 28px;
  border-bottom-color: var(--line);
}

.tab {
  padding: 13px 0;
  color: #5d6a7e;
  font-size: 13px;
}

.tab.active {
  color: var(--primary);
  border-color: var(--primary);
}

.whiteboard-wrap,
.annotation-workspace {
  border-radius: 17px;
  overflow: hidden;
}

.whiteboard-file-panel,
.board-toolbar,
.annotation-toolbar {
  border-color: var(--line);
  background: rgba(255, 255, 255, .95);
}

.room-banner {
  background: #fff;
}

.room-live-dot,
.board-status i,
.meet-status-dot {
  background: var(--success-accent);
}

.room-code,
.tool.active {
  color: var(--success);
  background: var(--success-soft);
}

.tool {
  min-width: 36px;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: #314057;
  background: #fff;
}

.tool.save-board {
  color: #fff;
  border-color: var(--navy);
  background: var(--navy);
  box-shadow: 0 5px 14px rgba(16, 38, 63, .15);
}

.tool.save-board:hover {
  border-color: #0b1d32;
  background: #0b1d32;
}

#complete-lesson {
  color: var(--success);
  border-color: #cfe8dc;
  background: rgba(255, 255, 255, .86);
}

#complete-lesson:hover {
  color: #1c6f50;
  border-color: #b9dccb;
  background: #fff;
}

.google-calendar-action {
  color: var(--success);
  border-color: #cfe8dc;
  background: var(--success-soft);
}

.google-calendar-action:hover {
  color: #1c6f50;
  border-color: #b9dccb;
  background: #dcf1e7;
}

#disconnect-google-calendar {
  color: var(--success);
}

.board-toolbar,
.annotation-toolbar {
  padding: 12px 16px;
}

.whiteboard-stage,
canvas {
  background-color: #fff;
  background-image: linear-gradient(#edf1f6 1px, transparent 1px), linear-gradient(90deg, #edf1f6 1px, transparent 1px);
}

.annotation-stage {
  background: #eef2f7;
}

/* Courses, homework and account directories */
.course-grid {
  gap: 18px;
}

.course-card {
  overflow: hidden;
  padding: 22px;
}

.course-card .course-teacher-progress {
  margin-top: auto;
  margin-bottom: 0;
  padding-top: 20px;
}

.course-card .course-progress {
  margin-top: 0;
  margin-bottom: 0;
  padding-top: 0;
}

.course-card-footer {
  flex-wrap: nowrap;
  margin: 14px -22px -22px;
  padding: 14px 22px 16px;
  border-top: 1px solid var(--line);
  background: #f7f9fd;
}

.student-row.header,
.teacher-row.header {
  background: #f7f9fd;
}

.course-progress-card,
.progress-card {
  border-color: #dfe8f7;
  background: linear-gradient(135deg, #f3f8ff, #f7f5ff 56%, #fff6f8);
}

.progress-ring {
  background: conic-gradient(var(--primary) 0 72%, #e6ecf5 72% 100%);
}

.progress-ring:before {
  background: #f7f8ff;
}

.homework-layout {
  gap: 22px;
}

#lesson-homework,
#lesson-homework .detail-tasks,
#lesson-homework .homework-form {
  width: 100%;
  max-width: none;
  min-width: 0;
}

#lesson-homework .homework-form {
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255, 255, 255, .98), #f5f8ff 68%, #faf7ff);
  box-shadow: var(--surface-shadow);
}

#lesson-homework .homework-interactive-builder {
  border-color: #dce6f5;
  background: #f8faff;
}

.teacher-homework-sections {
  gap: 24px;
}

.teacher-homework-section {
  padding: 22px 24px 24px;
}

.teacher-homework-section > .section-heading {
  margin-bottom: 20px;
}

.teacher-homework-section[data-homework-section="reviewed"]:not(:has(.teacher-homework-section-toggle[aria-expanded="true"])) > .section-heading {
  margin-bottom: 0;
}

.teacher-homework-empty {
  padding: 24px;
}

.student-homework-section-heading {
  margin-bottom: 18px;
}

.student-homework-done-body {
  margin-top: 18px;
}

.task-list {
  gap: 11px;
}

.task {
  padding: 17px 18px;
}

.task-check {
  border-color: #aeb9c8;
}

.task.done .task-check {
  border-color: var(--success);
  background: var(--success);
}

.due {
  color: var(--danger);
  background: var(--danger-soft);
}

.deadline-card {
  border-color: #f4e8ca;
  background: #fffaf0;
}

.small-progress {
  background: #f3ead7;
}

.small-progress span {
  background: var(--warning-accent);
}

.student-table,
.teacher-directory {
  border-radius: 18px;
}

.student-row,
.teacher-row {
  border-bottom-color: var(--line);
}

.student-progress-cell {
  display: grid;
  gap: 8px;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid #e1e8f3;
  border-radius: 12px;
  background: linear-gradient(135deg, #f7faff, #fbf9ff);
}

.student-progress-cell .course-progress {
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "copy percent"
    "track track";
  gap: 6px 10px;
  width: 100%;
  margin: 0;
}

.student-progress-cell .course-progress > span {
  grid-area: copy;
  color: var(--muted);
  font-size: 10px;
}

.student-progress-cell .course-progress > strong {
  grid-area: percent;
  align-self: center;
  color: var(--primary);
  font-size: 15px;
  line-height: 1;
}

.student-progress-cell .course-progress-track {
  grid-area: track;
  width: 100%;
}

.student-progress-rewards {
  display: flex;
  align-items: center;
  gap: 4px 10px;
  min-width: 0;
  flex-wrap: wrap;
}

.student-progress-rewards .student-badge-count,
.student-progress-rewards .student-sticker-book-count {
  margin: 0;
  font-size: 9px;
  line-height: 1.35;
}

.student-progress-empty {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.student-row-actions {
  display: grid;
  justify-content: stretch;
}

.student-row-actions .soft {
  width: 100%;
  white-space: nowrap;
}

@media (min-width: 1201px) {
  .student-row {
    grid-template-columns: minmax(155px, 1fr) minmax(150px, .9fr) minmax(210px, 1.15fr) minmax(200px, .9fr) minmax(120px, .6fr);
  }

  body.admin-mode .student-row.header,
  .student-row.admin-student-row {
    grid-template-columns: minmax(155px, 1fr) minmax(150px, .9fr) minmax(145px, .8fr) minmax(190px, 1.05fr) minmax(200px, .9fr) minmax(120px, .6fr);
  }
}

@media (min-width: 651px) and (max-width: 1200px) {
  .student-row {
    grid-template-columns: minmax(155px, 1fr) minmax(150px, .9fr) minmax(210px, 1.15fr) minmax(200px, .9fr) minmax(120px, .6fr);
  }

  body.admin-mode .student-row.header,
  .student-row.admin-student-row {
    grid-template-columns: minmax(155px, 1fr) minmax(150px, .9fr) minmax(145px, .8fr) minmax(190px, 1.05fr) minmax(200px, .9fr) minmax(120px, .6fr);
  }
}

.student-detail-section,
.lesson-sticker-student,
.lesson-completion-student,
.student-teacher-assignment {
  border-color: var(--line);
  background: #f8faff;
}

.student-detail-teacher-assignment {
  border-color: #dce8ff;
  background: #f5f8ff;
}

.teacher-directory,
.student-table,
.profile-form,
.profile-learning {
  box-shadow: var(--surface-shadow);
}

.toast {
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 11px;
  background: var(--navy);
  box-shadow: 0 14px 36px rgba(16, 38, 63, .24);
}

/* Authentication */
.auth-gate {
  padding: 28px;
  background:
    radial-gradient(circle at 14% 88%, rgba(92, 170, 255, .22), transparent 38%),
    radial-gradient(circle at 88% 84%, rgba(196, 143, 255, .18), transparent 38%),
    radial-gradient(circle at 88% 12%, rgba(242, 118, 97, .11), transparent 30%),
    linear-gradient(145deg, #f5faff, #f5f7ff 52%, #fff4fb);
}

.auth-card {
  width: min(460px, 100%);
  padding: 40px;
  border-color: rgba(231, 236, 243, .9);
  border-radius: 22px;
  box-shadow: 0 18px 54px rgba(30, 60, 100, .1);
}

.auth-brand {
  gap: 12px;
  margin-bottom: 34px;
  color: var(--ink);
  font-size: 19px;
  line-height: 1.3;
}

.auth-brand b {
  color: var(--coral);
}

.auth-card h1 {
  font-size: 34px;
}

.auth-tabs {
  gap: 5px;
  padding: 4px;
  border: 1px solid #e8edf4;
  border-radius: 11px;
  background: #f6f8fc;
}

.auth-tab {
  min-height: 40px;
  border-radius: 8px;
  color: var(--muted);
}

.auth-tab.active {
  color: var(--primary);
  background: #fff;
  box-shadow: 0 3px 10px rgba(30, 60, 100, .08);
}

.auth-card input {
  min-height: 46px;
  border-color: #dde4ed;
  border-radius: 11px;
}

.auth-message {
  color: var(--success) !important;
}

.auth-message.error {
  color: var(--danger) !important;
}

.app-loading {
  color: var(--ink);
  background:
    radial-gradient(circle at 22% 78%, rgba(92, 170, 255, .2), transparent 36%),
    radial-gradient(circle at 86% 82%, rgba(194, 126, 255, .15), transparent 34%),
    linear-gradient(145deg, #f5faff, #fff4fb);
}

.brand-mark.has-studio-logo,
.app-loading-mark.has-studio-logo {
  overflow: hidden;
  border-radius: 10px;
  background: transparent;
  box-shadow: none;
}

[data-studio-logo] {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

[data-studio-logo][hidden] {
  display: none;
}

.studio-logo-editor {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 19px;
  align-items: center;
  padding-bottom: 23px;
  margin-bottom: 21px;
  border-bottom: 1px solid var(--line);
}

.studio-logo-preview {
  display: grid;
  width: 118px;
  height: 82px;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f6f8fc;
  color: var(--primary);
  font-size: 28px;
  font-weight: 700;
}

.studio-logo-preview img {
  display: block;
  width: 100%;
  height: 100%;
  padding: 8px;
  object-fit: contain;
}

.studio-logo-preview img[hidden],
.studio-logo-preview span[hidden] {
  display: none;
}

.studio-logo-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.studio-logo-actions .text-button {
  min-height: 40px;
  padding: 9px 11px;
}

/* Sticker Book keeps its book metaphor but inherits the shared surfaces and typography. */
.sticker-book-state,
.sticker-admin-year-card,
.sticker-progress-summary,
.sticker-book-album,
.sticker-book-levels,
.sticker-level-card,
.student-sticker-history article {
  border-color: var(--line);
}

.sticker-book-active-label,
.sticker-book-page-status.active {
  color: var(--success);
  background: var(--success-soft);
}

.sticker-book-page-button:focus-visible,
.sticker-book-current-page:focus-visible {
  outline-color: var(--primary);
}

.sticker-progress-summary.compact,
.sticker-level-card,
.student-sticker-history article {
  background: rgba(255, 255, 255, .94);
}

.sticker-book-reader:not(.compact) :is(
  .sticker-level-card,
  .sticker-level-card.unlocked,
  .sticker-level-card.locked
) {
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

.dashboard-sticker-book .sticker-progress-summary.compact {
  border: 0;
  background: transparent;
  box-shadow: none;
}

@media (max-width: 1050px) {
  .teacher-dashboard-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  main {
    grid-column: 1;
  }

  .sidebar {
    z-index: 12;
    width: min(300px, 86vw);
    box-shadow: 18px 0 48px rgba(16, 38, 63, .14);
  }

  .view {
    padding: 36px clamp(20px, 4vw, 36px) 52px;
  }

  .topbar {
    padding-inline: clamp(20px, 4vw, 36px);
  }
}

@media (max-width: 580px) {
  body {
    font-size: 14px;
  }

  .view {
    padding: 28px 16px 44px;
  }

  .topbar {
    height: 62px;
    padding-inline: 16px;
  }

  .view h1 {
    font-size: 32px;
  }

  .welcome-row,
  .page-title {
    margin-bottom: 24px;
  }

  .card,
  .lesson-directory,
  .profile-form,
  .student-detail-panel {
    padding: 20px;
    border-radius: 16px;
  }

  .teacher-homework-section {
    padding: 20px;
  }

  .stats-grid,
  .stats-grid.teacher-stats,
  .teacher-side-widgets {
    grid-template-columns: 1fr;
  }

  .lesson-toolbar {
    gap: 12px;
  }

  .lesson-row {
    padding: 14px;
  }

  .lesson-hero.card {
    padding: 20px;
  }

  .lesson-hero h1 {
    font-size: 28px;
  }

  .auth-gate {
    padding: 16px;
  }

  .auth-card {
    padding: 28px 22px;
    border-radius: 18px;
  }

  .auth-card h1 {
    font-size: 30px;
  }

  .studio-logo-editor {
    grid-template-columns: 1fr;
  }

  .demo-pill {
    display: none;
  }
}

/*
 * Laptop density (roughly a 13–14 inch display at the default system scale).
 * Mobile keeps its compact layout and wide desktops keep the regular density;
 * this range gives intermediate screens larger, easier-to-scan UI instead of
 * squeezing desktop widgets into undersized typography.
 */
@media (min-width: 901px) and (max-width: 1536px) {
  body {
    font-size: 16px;
  }

  .brand {
    font-size: 17px;
  }

  .brand span span {
    font-size: 14px;
  }

  .nav-link {
    min-height: 56px;
    padding: 13px 15px;
    font-size: 15px;
  }

  .nav-link span {
    font-size: 20px;
  }

  .sidebar-bottom .nav-link,
  .sign-out {
    min-height: 48px;
    font-size: 14px;
  }

  .breadcrumb {
    font-size: 14px;
  }

  .demo-pill {
    min-height: 36px;
    font-size: 12px;
  }

  .view {
    padding-top: 42px;
    padding-bottom: 72px;
  }

  .view h1,
  .auth-card h1 {
    font-size: clamp(40px, 3.3vw, 46px);
  }

  .section-heading h2,
  .card h2,
  .lesson-list-group h2,
  .modal h2,
  .student-detail-identity h2,
  .sticker-progress-summary h3,
  .sticker-book-medal h3 {
    font-size: clamp(22px, 2vw, 26px);
  }

  .eyebrow {
    font-size: 12px;
  }

  .muted {
    font-size: 15px;
  }

  .card {
    padding: 26px;
  }

  .primary,
  .soft,
  .danger,
  .text-button,
  .avatar-upload-button,
  input,
  select,
  textarea {
    font-size: 14px;
  }

  .modal {
    padding: 32px;
  }

  .modal label,
  .profile-form > label,
  .homework-form label,
  .lesson-field > span,
  .lesson-field-label {
    font-size: 12px;
  }

  .stats-grid,
  .stats-grid.teacher-stats {
    gap: 20px;
    margin-bottom: 24px;
  }

  .stat {
    min-height: 94px;
    gap: 16px;
    padding: 20px;
  }

  .stat-icon,
  .material-icon {
    width: 44px;
    height: 44px;
  }

  .stat strong {
    font-size: 24px;
  }

  .stat small {
    font-size: 13px;
  }

  .teacher-dashboard-grid {
    gap: 22px;
  }

  .teacher-calendar {
    padding: 26px;
  }

  .teacher-side-widgets {
    gap: 20px;
  }

  .teacher-side-widgets .card {
    min-height: 190px;
    padding: 24px;
  }

  .calendar-weekdays {
    font-size: 11px;
  }

  .calendar-day {
    min-height: 102px;
    padding: 9px;
  }

  .calendar-event {
    padding: 6px 7px;
    font-size: 11px;
  }

  .teacher-agenda-row,
  .teacher-progress-row,
  .admin-overview-grid button {
    padding: 12px;
    font-size: 13px;
  }

  .lesson-directory {
    padding: 26px;
  }

  .lesson-toolbar {
    gap: 16px;
    padding-bottom: 22px;
  }

  .lesson-field select,
  .lesson-search {
    min-height: 48px;
  }

  .filter {
    min-height: 40px;
    padding: 10px 14px;
    font-size: 13px;
  }

  .lesson-summary {
    font-size: 14px;
  }

  .lesson-list {
    gap: 26px;
  }

  .lesson-list-group {
    gap: 12px;
  }

  .lesson-row {
    grid-template-columns: 62px minmax(0, 1fr) auto auto;
    min-height: 120px;
    gap: 17px;
    padding: 18px;
  }

  .lesson-date-badge {
    width: 58px;
    height: 60px;
  }

  .lesson-date-badge b {
    font-size: 21px;
  }

  .lesson-row-title h3 {
    font-size: 18px;
  }

  .lesson-row-title p {
    font-size: 13px;
  }

  .lesson-row-meta {
    font-size: 11px;
  }

  .status,
  .account-status,
  .lesson-status,
  .time-tag,
  .teacher-homework-status,
  .exercise-teacher-status,
  .meet-generation-status,
  .sticker-admin-status {
    min-height: 28px;
    padding: 6px 10px;
    font-size: 11px;
  }

  .lesson-row-actions > :is(button, a) {
    min-height: 40px;
    font-size: 12px;
  }

  .tab,
  .lesson-detail > .tabs .tab {
    font-size: 14px;
  }

  .course-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 360px), 1fr));
    gap: 22px;
  }

  .course-card {
    min-height: 400px;
    padding: 26px;
  }

  .course-level,
  .course-count {
    font-size: 11px;
  }

  .course-card h3 {
    font-size: 23px;
  }

  .course-card > p,
  .course-lesson-list li {
    font-size: 13px;
  }

  .course-lesson-list {
    gap: 10px;
    margin-block: 20px;
  }

  .course-card .course-teacher-progress {
    padding-top: 24px;
    font-size: 12px;
  }

  .course-card-footer {
    margin: 16px -26px -26px;
    padding: 16px 26px 18px;
  }

  .course-card-footer small {
    font-size: 12px;
  }

  .course-card-footer .text-button {
    font-size: 13px;
  }

  .material {
    min-height: 170px;
    padding: 20px;
  }

  .material h3 {
    font-size: 16px;
  }

  .material p,
  .material small,
  .material a {
    font-size: 13px;
  }

  .teacher-homework-sections {
    gap: 26px;
  }

  .teacher-homework-section {
    padding: 26px 28px 28px;
  }

  .teacher-homework-section > .section-heading {
    margin-bottom: 22px;
  }

  .teacher-homework-empty {
    padding: 28px;
    font-size: 15px;
  }

  .task {
    padding: 19px 20px;
  }

  .student-table {
    padding: 28px;
  }

  .student-row.header {
    padding: 18px 24px;
    font-size: 11px;
  }

  .student-row:not(.header) {
    padding: 20px 24px;
    font-size: 14px;
  }

  .student-progress-cell {
    padding: 12px 14px;
  }

  .student-progress-cell .course-progress > span {
    font-size: 11px;
  }

  .student-progress-cell .course-progress > strong {
    font-size: 16px;
  }

  .student-progress-rewards .student-badge-count,
  .student-progress-rewards .student-sticker-book-count {
    font-size: 10px;
  }

  .student-progress-empty,
  .student-row-actions .soft {
    font-size: 12px;
  }

  .teacher-row {
    padding: 19px 22px;
    font-size: 13px;
  }
}

@media (min-width: 901px) and (max-width: 1536px) and (max-height: 800px) {
  #sticker-book.view {
    padding-top: 22px;
  }

  #sticker-book .sticker-book-page-title {
    margin-bottom: 8px;
  }

  #sticker-book .sticker-book-page-title .eyebrow {
    display: block;
  }

  #sticker-book .sticker-book-page-title h1 {
    font-size: 30px;
    letter-spacing: -.02em;
  }
}

@media (min-width: 901px) and (max-width: 1320px) {
  #lessons.view.active {
    grid-template-columns: 1fr;
  }

  #lessons .lesson-directory {
    grid-column: 1;
    grid-row: 2;
  }

  body.teacher-mode #lessons .lesson-calendar-integration {
    grid-column: 1;
    grid-row: 2;
    position: static;
  }

  body.teacher-mode #lessons .lesson-directory {
    grid-column: 1;
    grid-row: 3;
  }

  .student-table {
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-gutter: stable;
  }

  .student-row {
    grid-template-columns: minmax(145px, 1fr) minmax(140px, .9fr) minmax(190px, 1.15fr) minmax(180px, .9fr) minmax(100px, .6fr);
  }

  body.admin-mode .student-row.header,
  .student-row.admin-student-row {
    min-width: 1030px;
  }
}

/* Lesson workspace alignment with the approved mockup. */
.lesson-detail.view {
  padding-top: 28px;
}

.lesson-detail > .back-button {
  margin-bottom: 16px;
}

.lesson-detail .lesson-hero.card {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 28px;
  padding: 28px 36px 26px;
  margin-bottom: 26px;
  border-radius: 18px;
}

.lesson-detail .lesson-hero h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
}

.lesson-detail .lesson-hero-title-row {
  align-items: center;
  gap: 12px 16px;
}

.lesson-detail .lesson-hero-title-row .lesson-meet-summary {
  min-height: 38px;
  padding: 8px 14px;
  border-radius: 11px;
  font-size: 12px;
}

.lesson-detail .lesson-hero-meta {
  align-items: center;
  flex-wrap: nowrap;
  gap: 8px 14px;
  margin-top: 20px;
}

.lesson-detail .lesson-hero-meta > div {
  align-items: center;
  flex: 0 0 auto;
  gap: 5px;
}

.lesson-detail .lesson-hero-meta dt {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 16px 16px;
}

.lesson-detail .lesson-hero-meta dt:before {
  content: none;
}

.lesson-detail .lesson-hero-meta > div:nth-child(1) dt {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23687386' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M7 2v4M17 2v4M3 9h18'/%3E%3Crect x='3' y='4' width='18' height='17' rx='2'/%3E%3C/svg%3E");
}

.lesson-detail .lesson-hero-meta > div:nth-child(2) dt {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23687386' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M12 7v5l3 2'/%3E%3C/svg%3E");
}

.lesson-detail .lesson-hero-meta > div:nth-child(3) dt {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23687386' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='8' r='4'/%3E%3Cpath d='M4.5 21a7.5 7.5 0 0 1 15 0'/%3E%3C/svg%3E");
}

.lesson-detail .lesson-hero-meta > div:nth-child(4) dt {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23687386' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='5' y='2.5' width='14' height='19' rx='2'/%3E%3Cpath d='M8 6h8M8 17h8'/%3E%3C/svg%3E");
}

.lesson-detail .lesson-hero-meta dd {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.35;
  white-space: nowrap;
}

.lesson-detail .lesson-description {
  gap: 10px;
  margin-top: 18px;
  padding-top: 18px;
  border-top-color: rgba(16, 38, 63, .12);
}

.lesson-detail .lesson-description .eyebrow {
  margin: 0;
  color: var(--coral);
  font-size: 10px;
}

.lesson-detail .lesson-description p:not(.eyebrow) {
  color: #405069;
  font-size: 13px;
  line-height: 1.55;
}

.lesson-detail .lesson-hero-side {
  max-width: none;
}

.lesson-detail .lesson-hero-actions {
  display: flex;
  grid-template-columns: none;
  justify-content: flex-end;
  gap: 14px;
}

.lesson-detail .lesson-hero-actions > :is(button, a) {
  width: auto;
  min-width: 214px;
  height: 44px;
  min-height: 44px;
  max-height: none;
  padding: 10px 18px;
  border-radius: 11px;
  font-size: 12px;
  line-height: 1.25;
}

.lesson-detail .lesson-hero-actions .join-lesson {
  min-width: 240px;
}

.lesson-detail > .tabs {
  gap: 28px;
}

.lesson-detail > .tabs .tab {
  padding: 12px 8px;
  font-size: 13px;
}

.lesson-detail > .lesson-tab {
  padding-top: 12px;
}

.lesson-detail .whiteboard-file-panel {
  gap: 14px 24px;
  padding: 20px 18px;
}

.lesson-detail .whiteboard-file-panel .muted {
  font-size: 13px;
  line-height: 1.5;
}

.lesson-detail .whiteboard-file-actions > :is(button, a) {
  min-height: 42px;
  padding: 10px 16px;
}

.lesson-detail .whiteboard-file-open {
  min-height: 32px;
  padding-block: 5px;
  font-size: 12px;
}

.lesson-detail #whiteboard .room-banner {
  min-height: 68px;
  margin: 0;
  padding: 14px 18px;
}

.lesson-detail #whiteboard .room-banner strong {
  font-size: 14px;
}

.lesson-detail #whiteboard .room-banner small {
  font-size: 12px;
}

.lesson-detail #whiteboard .room-code {
  padding: 9px 14px;
  font-size: 11px;
}

.lesson-detail #whiteboard .board-toolbar {
  min-height: 62px;
  gap: 10px;
  padding: 12px 16px;
}

.lesson-detail #whiteboard .color {
  width: 22px;
  height: 22px;
}

.lesson-detail #whiteboard .tool {
  min-height: 38px;
  padding-inline: 11px;
}

@media (max-width: 1050px) {
  .lesson-detail .lesson-hero.card {
    grid-template-columns: 1fr;
    padding: 26px 28px;
  }

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

@media (max-width: 580px) {
  .lesson-detail.view {
    padding-top: 18px;
  }

  .lesson-detail .lesson-hero.card {
    padding: 20px;
    margin-bottom: 22px;
  }

  .lesson-detail .lesson-hero h1 {
    font-size: 28px;
  }

  .lesson-detail .lesson-hero-meta {
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-top: 18px;
  }

  .lesson-detail .lesson-description {
    margin-top: 16px;
    padding-top: 16px;
  }

  .lesson-detail .lesson-hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }

  .lesson-detail .lesson-hero-actions > :is(button, a),
  .lesson-detail .lesson-hero-actions .join-lesson {
    width: 100%;
    min-width: 0;
    height: 44px;
    min-height: 44px;
  }

  .lesson-detail .whiteboard-file-panel {
    padding: 18px 16px;
  }

  .lesson-detail #whiteboard .room-banner {
    padding: 14px 16px;
  }

  .lesson-detail #whiteboard .board-toolbar {
    padding: 12px;
  }
}

.tutorial-settings {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 22px;
}

.tutorial-settings h2 {
  margin: 0 0 7px;
  font-size: 21px;
}

.tutorial-settings .soft {
  flex: 0 0 auto;
}

body.admin-mode .tutorial-eligible {
  display: none !important;
}

.tutorial-layer {
  position: fixed;
  z-index: 1000;
  inset: 0;
  pointer-events: auto;
}

.tutorial-layer[hidden] {
  display: none;
}

.tutorial-backdrop {
  position: fixed;
  z-index: 0;
  inset: 0;
  background: rgba(24, 37, 51, .24);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.tutorial-backdrop i {
  display: none;
  position: fixed;
  background: rgba(24, 37, 51, .24);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}

.tutorial-layer.has-target .tutorial-backdrop {
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.tutorial-layer.has-target .tutorial-backdrop i {
  display: block;
}

.tutorial-backdrop [data-tutorial-shade="top"] {
  inset: 0 0 auto;
  height: var(--tutorial-target-top);
}

.tutorial-backdrop [data-tutorial-shade="bottom"] {
  inset: var(--tutorial-target-bottom) 0 0;
}

.tutorial-backdrop [data-tutorial-shade="left"] {
  top: var(--tutorial-target-top);
  bottom: calc(100vh - var(--tutorial-target-bottom));
  left: 0;
  width: var(--tutorial-target-left);
}

.tutorial-backdrop [data-tutorial-shade="right"] {
  top: var(--tutorial-target-top);
  right: 0;
  bottom: calc(100vh - var(--tutorial-target-bottom));
  left: var(--tutorial-target-right);
}

.tutorial-backdrop [data-tutorial-corner] {
  width: var(--tutorial-target-radius);
  height: var(--tutorial-target-radius);
}

.tutorial-backdrop [data-tutorial-corner="top-left"] {
  top: var(--tutorial-target-top);
  left: var(--tutorial-target-left);
  -webkit-mask: radial-gradient(circle var(--tutorial-target-radius) at bottom right, transparent calc(100% - 1px), #000 100%);
  mask: radial-gradient(circle var(--tutorial-target-radius) at bottom right, transparent calc(100% - 1px), #000 100%);
}

.tutorial-backdrop [data-tutorial-corner="top-right"] {
  top: var(--tutorial-target-top);
  left: calc(var(--tutorial-target-right) - var(--tutorial-target-radius));
  -webkit-mask: radial-gradient(circle var(--tutorial-target-radius) at bottom left, transparent calc(100% - 1px), #000 100%);
  mask: radial-gradient(circle var(--tutorial-target-radius) at bottom left, transparent calc(100% - 1px), #000 100%);
}

.tutorial-backdrop [data-tutorial-corner="bottom-right"] {
  top: calc(var(--tutorial-target-bottom) - var(--tutorial-target-radius));
  left: calc(var(--tutorial-target-right) - var(--tutorial-target-radius));
  -webkit-mask: radial-gradient(circle var(--tutorial-target-radius) at top left, transparent calc(100% - 1px), #000 100%);
  mask: radial-gradient(circle var(--tutorial-target-radius) at top left, transparent calc(100% - 1px), #000 100%);
}

.tutorial-backdrop [data-tutorial-corner="bottom-left"] {
  top: calc(var(--tutorial-target-bottom) - var(--tutorial-target-radius));
  left: var(--tutorial-target-left);
  -webkit-mask: radial-gradient(circle var(--tutorial-target-radius) at top right, transparent calc(100% - 1px), #000 100%);
  mask: radial-gradient(circle var(--tutorial-target-radius) at top right, transparent calc(100% - 1px), #000 100%);
}

.tutorial-spotlight {
  position: fixed;
  z-index: 1;
  border: 3px solid #fff;
  border-radius: 16px;
  background: rgba(255, 255, 255, .05);
  box-shadow: 0 5px 18px rgba(15, 27, 39, .16), 0 0 0 1px rgba(255, 255, 255, .28);
  pointer-events: none;
}

.tutorial-card {
  position: fixed;
  z-index: 2;
  width: min(400px, calc(100vw - 24px));
  max-height: min(520px, calc(100dvh - 24px));
  overflow: auto;
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, .85);
  border-radius: 18px;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 24px 70px rgba(15, 27, 39, .28);
  outline: 0;
  transition: top .2s ease, left .2s ease;
}

.tutorial-card:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

.tutorial-layer:not(.has-target) .tutorial-card:focus-visible {
  outline: none;
}

body.tutorial-running .view.active,
body.tutorial-running .student-detail-panel:not([hidden]) {
  animation: none !important;
}

.tutorial-brand,
.tutorial-progress {
  margin: 0;
  color: var(--primary);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .12em;
}

.tutorial-progress {
  margin-top: 7px;
  color: var(--muted);
  letter-spacing: .04em;
}

.tutorial-card h2 {
  margin: 16px 0 8px;
  font-size: 24px;
  line-height: 1.2;
}

.tutorial-card > p:last-of-type {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.tutorial-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
}

.tutorial-actions > div {
  display: flex;
  gap: 8px;
}

.tutorial-actions button {
  min-height: 42px;
}

@media (max-width: 680px) {
  .tutorial-settings {
    align-items: flex-start;
    flex-direction: column;
  }

  .tutorial-settings .soft {
    width: 100%;
  }

  .tutorial-card {
    right: 12px !important;
    left: 12px !important;
    width: auto;
    max-height: min(48dvh, 430px);
    padding: 24px;
  }

  .tutorial-card h2 {
    font-size: 21px;
  }

  .tutorial-actions {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .tutorial-actions > div {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .tutorial-actions > div > :only-child,
  .tutorial-actions #tutorial-finish:not([hidden]) {
    grid-column: 1 / -1;
  }

  .tutorial-actions #tutorial-skip {
    align-self: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-spotlight,
  .tutorial-card {
    transition: none;
  }
}