:root {
  --bg: #f8f3ea;
  --bg-strong: #efe6d6;
  --card: rgba(255, 252, 246, 0.95);
  --ink: #21312a;
  --muted: #5f6f65;
  --line: rgba(33, 49, 42, 0.12);
  --accent: #136f63;
  --accent-soft: #d9eee5;
  --warm: #cf6a32;
  --warm-soft: #f8dfcf;
  --danger: #9d2f2f;
  --success: #1f7a47;
  --shadow: 0 18px 48px rgba(35, 50, 43, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(19, 111, 99, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(207, 106, 50, 0.14), transparent 26%),
    linear-gradient(180deg, #fcfaf5 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: "Avenir Next", "Trebuchet MS", sans-serif;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
strong {
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
}

p,
li,
label,
input,
textarea,
select,
button,
table {
  font: inherit;
}

h1,
h2,
h3,
p,
strong,
.choice-option-text,
.feedback,
.badge,
.progress-pill,
.user-chip,
.button {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.2rem 0 3rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
  background: rgba(255, 251, 245, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: calc(var(--radius) + 4px);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--ink);
}

.brand small {
  display: block;
  color: var(--muted);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent) 0%, #2d9482 100%);
  color: white;
  font-weight: 700;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.main-nav,
.topbar-actions,
.button-row,
.pill-list,
.stack-inline,
.filter-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.main-nav a {
  padding: 0.6rem 0.95rem;
  border-radius: 999px;
  color: var(--muted);
}

.main-nav a.is-active,
.main-nav a:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.user-chip,
.badge,
.progress-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  background: rgba(19, 111, 99, 0.09);
  color: var(--accent);
  font-size: 0.95rem;
}

.badge-muted {
  background: rgba(33, 49, 42, 0.08);
  color: var(--muted);
}

.content {
  display: grid;
  gap: 1.4rem;
}

.hero,
.split-layout,
.card-grid,
.stat-grid {
  display: grid;
  gap: 1.2rem;
}

.hero {
  grid-template-columns: 1.25fr 0.95fr;
  align-items: stretch;
  padding: 1.4rem 0 0.6rem;
}

.hero-home {
  position: relative;
  min-height: 560px;
  grid-template-columns: minmax(0, 0.72fr);
  padding: 2.4rem;
  border-radius: calc(var(--radius) + 0.75rem);
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(252, 249, 241, 0.92) 0%, rgba(252, 249, 241, 0.84) 34%, rgba(252, 249, 241, 0.46) 60%, rgba(252, 249, 241, 0.14) 100%),
    radial-gradient(circle at 82% 18%, rgba(210, 224, 199, 0.36), transparent 32%),
    linear-gradient(180deg, #fcfaf4 0%, #f4f5ef 100%);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow);
}

.hero-home::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--home-hero-image, none);
  background-position: center right;
  background-repeat: no-repeat;
  background-size: cover;
  opacity: 1;
  pointer-events: none;
}

.hero-home::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(252, 249, 241, 0.97) 0%, rgba(252, 249, 241, 0.91) 34%, rgba(252, 249, 241, 0.48) 58%, rgba(252, 249, 241, 0.1) 100%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-copy {
  display: grid;
  align-content: center;
  gap: 1rem;
  max-width: 34rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.3rem, 4vw, 4rem);
  line-height: 1.02;
}

.hero-smile {
  font-size: 0.8em;
  vertical-align: 0.06em;
}

.hero-text {
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-panel {
  display: grid;
  gap: 1rem;
}

.stat-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.card,
.stat-card,
.note-card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card,
.note-card {
  padding: 1.35rem;
}

.stat-card {
  padding: 1.2rem;
}

.stat-card span,
.muted {
  color: var(--muted);
}

.stat-card strong {
  display: block;
  margin-top: 0.45rem;
  font-size: 2rem;
}

.feature-card {
  min-height: 180px;
  display: grid;
  align-content: start;
  gap: 1rem;
}

.feature-card-head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.feature-card-icon {
  width: 4.4rem;
  height: 4.4rem;
  object-fit: cover;
  flex-shrink: 0;
  border-radius: 999px;
}

.feature-card h2,
.feature-card p {
  margin: 0;
}

.feature-card p {
  color: var(--muted);
  line-height: 1.6;
}

.feature-card-subtext {
  font-size: 0.95rem;
}

.feature-card-smile {
  font-size: 0.95em;
  vertical-align: 0.04em;
}

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

.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.compact-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.page-header,
.section-title,
.question-summary-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow {
  margin: -0.7rem 0 1.15rem;
  color: var(--warm);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.pdf-viewer-shell {
  overflow: hidden;
  border-radius: calc(var(--radius) - 0.25rem);
  border: 1px solid rgba(19, 111, 99, 0.12);
  background: #f6f7f6;
}

.pdf-viewer-frame {
  display: block;
  width: 100%;
  min-height: 78vh;
  border: 0;
  background: white;
}

.stack-form,
.stack-list,
.quiz-runner {
  display: grid;
  gap: 1rem;
}

.quiz-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.quiz-navigation p {
  margin-bottom: 0;
}

.quiz-navigation .button-row {
  justify-content: flex-end;
}

.stack-form label,
.filter-grid label {
  display: grid;
  gap: 0.45rem;
  color: var(--ink);
}

input,
textarea,
select {
  width: 100%;
  padding: 0.82rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: white;
  color: var(--ink);
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus,
button:focus {
  outline: 3px solid rgba(19, 111, 99, 0.18);
  outline-offset: 2px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.15rem;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent) 0%, #2a8a7b 100%);
  color: white;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(19, 111, 99, 0.2);
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.button-secondary {
  background: var(--bg-strong);
  color: var(--ink);
  box-shadow: none;
}

.button-danger {
  background: var(--warm-soft);
  color: var(--danger);
  box-shadow: none;
}

.flash-stack {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.flash {
  padding: 0.9rem 1rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: white;
}

.flash-success {
  border-color: rgba(31, 122, 71, 0.2);
  background: rgba(31, 122, 71, 0.08);
}

.flash-warning {
  border-color: rgba(207, 106, 50, 0.2);
  background: rgba(207, 106, 50, 0.08);
}

.flash-error {
  border-color: rgba(157, 47, 47, 0.2);
  background: rgba(157, 47, 47, 0.08);
}

.auth-layout {
  min-height: 70vh;
  display: grid;
  place-items: center;
}

.auth-card {
  width: min(520px, 100%);
}

.list-card,
.question-summary,
.review-card {
  display: grid;
  gap: 0.8rem;
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  color: inherit;
}

.list-card:hover {
  text-decoration: none;
  border-color: rgba(19, 111, 99, 0.26);
  transform: translateY(-2px);
}

.question-bank-pick {
  cursor: pointer;
}

.question-bank-pick.is-disabled {
  opacity: 0.72;
  cursor: default;
}

.question-bank-pick input[type="checkbox"]:disabled + span {
  opacity: 0.72;
}

.list-card-actions {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}

.list-card-main p {
  margin-bottom: 0;
}

.list-card-side {
  display: grid;
  justify-items: end;
  gap: 0.85rem;
}

.answer-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.is-correct-answer {
  color: var(--success);
  font-weight: 700;
}

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

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

.data-table th,
.data-table td {
  padding: 0.9rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.empty-state {
  color: var(--muted);
  margin: 0;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.toggle-group.hidden {
  display: none;
}

.question-card.correct,
.review-card.correct {
  border-color: rgba(31, 122, 71, 0.22);
  background: rgba(31, 122, 71, 0.05);
}

.question-card.incorrect,
.review-card.incorrect {
  border-color: rgba(157, 47, 47, 0.18);
  background: rgba(157, 47, 47, 0.04);
}

.quiz-runner-single .question-card {
  margin: 0;
}

.question-card-hidden {
  display: none;
}

.choice-grid {
  display: grid;
  gap: 0.75rem;
}

.choice-grid-rows {
  gap: 0.9rem;
}

.choice-button {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: white;
  text-align: left;
  cursor: pointer;
}

.choice-button:hover:not(:disabled) {
  border-color: rgba(19, 111, 99, 0.35);
  background: rgba(19, 111, 99, 0.06);
}

.inline-answer-form {
  display: flex;
  gap: 0.75rem;
}

.inline-answer-form input {
  flex: 1;
}

.feedback {
  min-height: 1.5rem;
  padding: 0.25rem 0;
  color: var(--muted);
  font-weight: 600;
  font-size: 1.02rem;
}

.feedback-detail {
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 0.3rem;
}

.feedback-status {
  font-weight: 600;
}

.feedback.correct {
  color: var(--success);
}

.feedback.incorrect {
  color: var(--danger);
}

.feedback-status.correct {
  color: var(--success);
}

.feedback-status.incorrect {
  color: var(--danger);
}

.choice-option {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 1.1rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: white;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.choice-option:hover {
  border-color: rgba(19, 111, 99, 0.28);
  transform: translateY(-1px);
}

.question-card[data-answered="true"] .choice-option,
.review-card .choice-option {
  cursor: default;
}

.question-card[data-answered="true"] .choice-option:hover,
.review-card .choice-option:hover {
  transform: none;
}

.choice-option-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.choice-option-text {
  flex: 1;
  font-size: 1.08rem;
  line-height: 1.45;
}

.choice-option-large {
  min-height: 4.7rem;
  padding: 1.15rem 1.4rem;
}

.choice-option.is-selected,
.choice-button.is-selected {
  border-color: rgba(19, 111, 99, 0.4);
  background: rgba(19, 111, 99, 0.08);
}

.choice-state-selected-correct {
  border-color: rgba(31, 122, 71, 0.48);
  background: rgba(31, 122, 71, 0.14);
}

.choice-state-missed-correct {
  border-width: 3px;
  border-color: rgba(31, 122, 71, 0.75);
  background: white;
  box-shadow: inset 0 0 0 1px rgba(31, 122, 71, 0.18);
}

.choice-state-selected-incorrect {
  border-color: rgba(157, 47, 47, 0.48);
  background: rgba(157, 47, 47, 0.1);
}

.helper-text {
  margin: 0;
}

.answer-submit {
  align-self: center;
  width: min(360px, 100%);
}

.question-action-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.question-action-row .button {
  margin: 0;
}

.answer-submit {
  flex: 1 1 auto;
  width: auto;
}

.answer-next {
  flex: 0 0 auto;
  min-width: 8rem;
}

.answer-field-large {
  min-height: 3.9rem;
  padding: 1rem 1.15rem;
  border-radius: 22px;
  font-size: 1.08rem;
}

.review-answer-stack {
  display: grid;
  gap: 0.85rem;
}

.review-answer-box {
  padding: 1rem 1.15rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: white;
  font-size: 1.05rem;
}

.review-answer-box-correct {
  border-color: rgba(31, 122, 71, 0.48);
  background: rgba(31, 122, 71, 0.14);
}

.review-answer-box-incorrect {
  border-color: rgba(157, 47, 47, 0.48);
  background: rgba(157, 47, 47, 0.1);
}

.responsive-phone-only {
  display: none;
}

.attempt-summary-card {
  display: grid;
  gap: 1rem;
}

.attempt-history-group {
  display: grid;
  gap: 1rem;
}

.attempt-summary-entry {
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.admin-attempt-card-grid {
  gap: 0.9rem;
}

.admin-attempt-card {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.admin-attempt-card h3,
.admin-attempt-card p {
  margin: 0;
}

.admin-attempt-head {
  align-items: center;
  gap: 0.6rem;
}

.admin-attempt-head h3 {
  flex: 1;
  min-width: 0;
  font-size: 1.02rem;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-attempt-head .badge {
  flex-shrink: 0;
  white-space: nowrap;
  padding: 0.32rem 0.6rem;
  font-size: 0.84rem;
}

.admin-attempt-card .button {
  width: 100%;
}

.student-quiz-head {
  align-items: center;
}

.student-quiz-head h2 {
  flex: 1;
  min-width: 0;
}

.student-quiz-score {
  flex-shrink: 0;
  white-space: nowrap;
  word-break: normal;
  overflow-wrap: normal;
  min-width: 4.25rem;
  justify-content: center;
  text-align: center;
}

.attempt-summary-card h3 {
  margin: 0;
  font-size: 1.35rem;
}

.attempt-summary-meta {
  display: grid;
  gap: 0.45rem;
}

.attempt-summary-meta p {
  margin: 0;
}

.hidden {
  display: none !important;
}

.checkbox-line {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.checkbox-line input {
  width: auto;
  margin-top: 0.15rem;
  accent-color: var(--accent);
}

.question-image-wrap {
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
}

.question-image-display {
  width: 100%;
  margin-bottom: 0.85rem;
}

.question-image {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  background: #fff;
}

.image-upload-panel {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 20px;
  border: 1px dashed rgba(19, 111, 99, 0.3);
  background: rgba(19, 111, 99, 0.05);
}

.image-library-picker {
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
  border-radius: 20px;
  border: 1px dashed rgba(19, 111, 99, 0.28);
  background: rgba(19, 111, 99, 0.05);
}

.image-library-picker .section-title {
  align-items: center;
}

.library-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.library-image-card {
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.library-image-thumb {
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
}

.library-image-thumb .question-image {
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: contain;
}

.compact-stack {
  gap: 0.65rem;
}

option[hidden] {
  display: none;
}

.crop-editor-shell {
  overflow: auto;
  padding: 0.5rem;
  border-radius: 18px;
  border: 1px solid rgba(19, 111, 99, 0.16);
  background: rgba(255, 255, 255, 0.7);
}

.crop-editor-canvas {
  display: block;
  max-width: 100%;
  cursor: crosshair;
  background: white;
  border-radius: 16px;
}

.image-preview-shell {
  overflow: auto;
  padding: 0.5rem;
}

.image-resizable {
  position: relative;
  width: 320px;
}

.image-preview {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: white;
}

.image-resize-handle {
  position: absolute;
  right: 0.4rem;
  bottom: 0.4rem;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid white;
  box-shadow: 0 8px 20px rgba(19, 111, 99, 0.28);
  cursor: se-resize;
  touch-action: none;
}

.force-phone-layout,
.force-phone-layout body {
  overflow-x: hidden;
}

.force-phone-layout .page-shell {
  width: calc(var(--device-vw, 100vw) - 0.75rem);
  max-width: calc(var(--device-vw, 100vw) - 0.75rem);
  padding: 0.75rem 0 2rem;
}

.force-phone-layout .topbar,
.force-phone-layout .page-header,
.force-phone-layout .question-summary-head,
.force-phone-layout .quiz-navigation {
  flex-direction: column;
  align-items: stretch;
}

.force-phone-layout .hero,
.force-phone-layout .split-layout,
.force-phone-layout .filter-grid,
.force-phone-layout .card-grid,
.force-phone-layout .stat-grid,
.force-phone-layout .list-card-actions {
  grid-template-columns: 1fr;
}

.force-phone-layout .topbar {
  padding: 0.9rem;
  gap: 0.85rem;
}

.force-phone-layout .brand {
  align-items: flex-start;
}

.force-phone-layout .brand small {
  font-size: 0.88rem;
}

.force-phone-layout .main-nav,
.force-phone-layout .topbar-actions,
.force-phone-layout .button-row,
.force-phone-layout .stack-inline,
.force-phone-layout .pill-list,
.force-phone-layout .filter-actions {
  width: 100%;
}

.force-phone-layout .main-nav a {
  flex: 1 1 calc(50% - 0.4rem);
  text-align: center;
}

.force-phone-layout .topbar-actions form,
.force-phone-layout .page-header form,
.force-phone-layout .stack-inline form,
.force-phone-layout .quiz-navigation .button-row,
.force-phone-layout .quiz-navigation .button-row .button,
.force-phone-layout .page-header .button,
.force-phone-layout .page-header form .button,
.force-phone-layout .stack-inline .button,
.force-phone-layout .topbar-actions .button {
  width: 100%;
}

.force-phone-layout .page-header .stack-inline,
.force-phone-layout .page-header .button-row,
.force-phone-layout .quiz-navigation .button-row {
  flex-direction: column;
  align-items: stretch;
}

.force-phone-layout .page-header .button-row .button {
  width: 100%;
}

.force-phone-layout .filter-grid {
  grid-template-columns: 1fr;
}

.force-phone-layout .filter-actions {
  flex-direction: column;
  align-items: stretch;
}

.force-phone-layout .filter-actions .button {
  width: 100%;
}

.force-phone-layout .progress-pill,
.force-phone-layout .user-chip,
.force-phone-layout .badge {
  max-width: 100%;
  justify-content: center;
  text-align: center;
}

.force-phone-layout h1,
.force-phone-layout .hero h1 {
  font-size: clamp(1.8rem, 8vw, 2.3rem);
  line-height: 1.08;
}

.force-phone-layout .hero-home {
  min-height: auto;
  grid-template-columns: 1fr;
  padding: 1.15rem;
}

.force-phone-layout .hero-home::before {
  background-position: 72% center;
  background-size: cover;
}

.force-phone-layout .hero-home::after {
  background: linear-gradient(180deg, rgba(252, 249, 241, 0.98) 0%, rgba(252, 249, 241, 0.9) 44%, rgba(252, 249, 241, 0.78) 100%);
}

.force-phone-layout .hero-copy {
  gap: 0.9rem;
}

.force-phone-layout h2 {
  font-size: clamp(1.25rem, 6vw, 1.7rem);
  line-height: 1.18;
}

.force-phone-layout .question-card h2,
.force-phone-layout .review-card h2 {
  font-size: clamp(1.45rem, 7vw, 1.9rem);
}

.force-phone-layout .card,
.force-phone-layout .note-card,
.force-phone-layout .stat-card {
  padding: 1rem;
  border-radius: 20px;
}

.force-phone-layout .list-card-side {
  justify-items: stretch;
}

.force-phone-layout .choice-option-large {
  min-height: auto;
  padding: 1rem 1.05rem;
  border-radius: 20px;
}

.force-phone-layout .library-image-grid {
  grid-template-columns: 1fr;
}

.force-phone-layout .choice-option-text,
.force-phone-layout .answer-field-large,
.force-phone-layout .feedback {
  font-size: 1rem;
}

.force-phone-layout .answer-field-large {
  min-height: 3.5rem;
}

.force-phone-layout .answer-submit {
  width: auto;
}

.force-phone-layout .question-action-row {
  gap: 0.7rem;
}

.force-phone-layout .answer-next {
  min-width: 6.8rem;
}

.force-phone-layout .question-image {
  max-height: 280px;
}

.force-phone-layout .inline-answer-form {
  flex-direction: column;
}

.force-phone-layout .responsive-desktop-only {
  display: none;
}

.force-phone-layout .responsive-phone-only {
  display: grid;
  gap: 1rem;
}

.force-phone-layout .attempt-summary-entry .button,
.force-phone-layout .attempt-history-group .badge,
.force-phone-layout .admin-attempt-card .badge {
  width: 100%;
}

.force-phone-layout .admin-attempt-head {
  flex-direction: row;
  align-items: center;
}

.force-phone-layout .admin-attempt-head .badge {
  width: auto;
}

.force-phone-layout .student-quiz-score {
  width: auto;
}

@media (max-width: 900px) {
  .topbar,
  .page-header,
  .question-summary-head,
  .quiz-navigation {
    flex-direction: column;
    align-items: stretch;
  }

  .hero,
  .split-layout,
  .filter-grid {
    grid-template-columns: 1fr;
  }

  .hero-home {
    min-height: auto;
  }

  .hero-home::after {
    background: linear-gradient(180deg, rgba(252, 249, 241, 0.98) 0%, rgba(252, 249, 241, 0.9) 45%, rgba(252, 249, 241, 0.76) 100%);
  }

  .hero-illustration-card,
  .hero-note-card {
    width: 100%;
    margin-left: 0;
  }

  .list-card-actions {
    grid-template-columns: 1fr;
  }

  .list-card-side {
    justify-items: stretch;
  }

  .main-nav,
  .topbar-actions,
  .stack-inline {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 0.75rem, 100%);
    padding: 0.75rem 0 2rem;
  }

  .topbar {
    padding: 0.9rem;
    gap: 0.85rem;
  }

  .brand {
    align-items: flex-start;
  }

  .brand small {
    font-size: 0.88rem;
  }

  h1,
  .hero h1 {
    font-size: clamp(1.8rem, 8vw, 2.3rem);
    line-height: 1.08;
  }

  h2 {
    font-size: clamp(1.25rem, 6vw, 1.7rem);
    line-height: 1.18;
  }

  .card,
  .note-card,
  .stat-card {
    padding: 1rem;
    border-radius: 20px;
  }

  .main-nav,
  .topbar-actions,
  .button-row,
  .stack-inline,
  .pill-list,
  .filter-actions {
    width: 100%;
  }

  .main-nav a {
    flex: 1 1 calc(50% - 0.4rem);
    text-align: center;
  }

  .topbar-actions form,
  .page-header form,
  .stack-inline form,
  .quiz-navigation .button-row,
  .quiz-navigation .button-row .button,
  .page-header .button,
  .page-header form .button,
  .stack-inline .button,
  .topbar-actions .button {
    width: 100%;
  }

  .page-header .stack-inline,
  .page-header .button-row,
  .quiz-navigation .button-row {
    flex-direction: column;
    align-items: stretch;
  }

  .page-header .button-row .button {
    width: 100%;
  }

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

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

  .filter-actions .button {
    width: 100%;
  }

  .progress-pill,
  .user-chip,
  .badge {
    max-width: 100%;
    justify-content: center;
    text-align: center;
  }

  .question-card h2,
  .review-card h2 {
    font-size: clamp(1.45rem, 7vw, 1.9rem);
  }

  .choice-option-large {
    min-height: auto;
    padding: 1rem 1.05rem;
    border-radius: 20px;
  }

  .library-image-grid {
    grid-template-columns: 1fr;
  }

  .choice-option-text,
  .answer-field-large,
  .feedback {
    font-size: 1rem;
  }

  .answer-field-large {
    min-height: 3.5rem;
  }

  .answer-submit {
    width: auto;
  }

  .question-action-row {
    gap: 0.7rem;
  }

  .answer-next {
    min-width: 6.8rem;
  }

  .question-image {
    max-height: 280px;
  }

  .inline-answer-form {
    flex-direction: column;
  }

  .data-table th,
  .data-table td {
    white-space: nowrap;
  }

  .responsive-desktop-only {
    display: none;
  }

  .responsive-phone-only {
    display: grid;
    gap: 1rem;
  }

  .attempt-summary-entry .button,
  .attempt-history-group .badge,
  .admin-attempt-card .badge {
    width: 100%;
  }

  .admin-attempt-head {
    flex-direction: row;
    align-items: center;
  }

  .admin-attempt-head .badge {
    width: auto;
  }

  .student-quiz-score {
    width: auto;
  }
}