/* Hallmark · genre: playful editorial · macrostructure: Workbench + Focus Stage · design-system: DESIGN.md · designed-as-app · pre-emit critique: P5 H5 E4 S5 R5 V4 */

html,
body {
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
}

body {
  background: var(--color-paper);
}

[hidden] {
  display: none !important;
}

* {
  scrollbar-color: var(--color-scrollbar) transparent;
}

::selection {
  background: var(--color-brand-soft);
  color: var(--color-ink);
}

button,
input,
textarea,
select {
  font-family: var(--font-body);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 0.1875rem solid var(--color-focus);
  outline-offset: 0.1875rem;
}

.topbar {
  background: var(--color-nav);
  border-block-end: 0.0625rem solid var(--color-brand-mid);
  box-shadow: none;
  color: var(--color-nav-text);
  backdrop-filter: none;
}

.topbar__inner {
  min-height: 4.5rem;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-xl);
}

.topbar__right {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-lg);
}

.brand {
  gap: var(--space-2xs);
  color: var(--color-nav-text);
}

.brand__title {
  color: var(--color-nav-text);
  font-family: var(--font-wordmark);
  font-size: clamp(1.55rem, 2.2vw, 2rem);
  font-style: normal;
  font-weight: 400;
}

.brand__eyebrow {
  color: var(--color-nav-muted);
  font-family: var(--font-wordmark);
  font-size: var(--text-xs);
  font-weight: 400;
}

.topbar__tools {
  justify-self: end;
  gap: var(--space-lg);
}

.topbar__tools button {
  min-height: 2.75rem;
  padding: 0;
  color: var(--color-nav-muted);
  font-size: var(--text-sm);
  font-weight: 800;
  white-space: nowrap;
}

.topbar__tools button::after {
  inset-block-end: 0.25rem;
  height: 0.125rem;
  background: var(--color-gold);
}

.topbar__tools button:hover,
.topbar__tools button.is-active {
  color: var(--color-nav-text);
}

/* Account: avatar-first trigger and a flat, ruled menu (one containment layer). */
.topbar__account-trigger {
  min-height: 2.75rem;
  min-width: 2.75rem;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-nav-text);
  box-shadow: none;
}

.topbar__account-trigger:hover,
.topbar__account-trigger[aria-expanded="true"] {
  border: 0;
  background: transparent;
  box-shadow: none;
}

.topbar__avatar {
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-nav-text);
  color: var(--color-brand-strong);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 650;
  line-height: 1;
  box-shadow: 0 0 0 0.125rem var(--color-nav), 0 0 0 0.25rem transparent;
  transition: box-shadow var(--dur-short) var(--ease-out);
}

.topbar__account-trigger:hover .topbar__avatar,
.topbar__account-trigger[aria-expanded="true"] .topbar__avatar {
  box-shadow: 0 0 0 0.125rem var(--color-nav), 0 0 0 0.25rem var(--color-gold);
}

.topbar__identity,
.topbar__account-chevron {
  display: none;
}

.account-menu {
  width: min(19rem, calc(100vw - 2rem));
  padding: 0;
  border-color: var(--color-rule);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-raised);
}

.account-menu__identity {
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-md) var(--space-sm);
  border-bottom: 0;
}

.account-menu__identity .topbar__avatar {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-ink);
  color: var(--color-nav-text);
  font-size: 1.1rem;
  box-shadow: none;
}

.account-menu__identity strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.account-menu__identity small {
  color: var(--color-ink-faint);
  font-size: var(--text-xs);
}

.account-menu__nav {
  display: flex;
  gap: var(--space-md);
  padding: 0 var(--space-md);
  border-bottom: 0.0625rem solid var(--color-rule);
}

.account-menu__nav button {
  position: relative;
  min-height: 2.5rem;
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-ink-faint);
  font-size: var(--text-sm);
  font-weight: 700;
}

.account-menu__nav button:hover,
.account-menu__nav button[aria-pressed="true"] {
  background: transparent;
  color: var(--color-ink);
}

.account-menu__nav button[aria-pressed="true"]::after {
  content: "";
  position: absolute;
  inset: auto 0 -0.0625rem;
  height: 0.125rem;
  background: var(--color-ink);
}

.account-menu__section {
  padding: var(--space-md);
  border-radius: 0;
  background: transparent;
}

.account-profile {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: var(--space-xs);
}

.account-profile label {
  gap: var(--space-2xs);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
  font-weight: 700;
}

.account-profile input {
  min-height: 2.5rem;
  padding: 0 var(--space-sm);
  border-color: var(--color-rule-strong);
  border-radius: 0.625rem;
  background: var(--color-surface);
  color: var(--color-ink);
  font: 500 var(--text-sm) var(--font-body);
  transition: border-color var(--dur-short) var(--ease-out), box-shadow var(--dur-short) var(--ease-out);
}

.account-profile input:focus {
  border-color: var(--color-brand);
  outline: none;
  box-shadow: 0 0 0 0.1875rem var(--color-brand-whisper);
}

.account-profile button {
  min-height: 2.5rem;
  padding: 0 var(--space-md);
  border-radius: var(--radius-control);
  background: var(--color-ink);
  color: var(--color-nav-text);
  font-size: var(--text-sm);
  transition: background-color var(--dur-short) var(--ease-out);
}

.account-profile button:hover { background: var(--color-brand); }
.account-profile button:disabled { opacity: 0.6; }

.account-profile p {
  grid-column: 1 / -1;
  min-height: 0;
  color: var(--color-green);
  font-size: var(--text-xs);
}

.account-profile p:empty { display: none; }

.account-setting strong { font-size: var(--text-sm); font-weight: 700; }
.account-setting small { color: var(--color-ink-faint); font-size: var(--text-xs); line-height: 1.4; }

.account-setting input {
  appearance: none;
  position: relative;
  flex: 0 0 auto;
  width: 2.25rem;
  height: 1.25rem;
  margin: 0;
  border-radius: var(--radius-pill);
  background: var(--color-rule-strong);
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out);
}

.account-setting input::after {
  content: "";
  position: absolute;
  inset: 0.125rem auto auto 0.125rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--color-surface);
  transition: transform var(--dur-short) var(--ease-out);
}

.account-setting input:checked { background: var(--color-ink); }
.account-setting input:checked::after { transform: translateX(1rem); }

.topbar__signout {
  min-height: 2.75rem;
  margin: 0;
  padding: 0 var(--space-md);
  border-top: 0.0625rem solid var(--color-rule);
  border-radius: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 700;
  transition: color var(--dur-short) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

.topbar__signout:hover {
  background: var(--color-red-soft);
  color: var(--color-red);
}

@media (max-width: 40rem) {
  .account-menu { width: auto; }
  .topbar__account-trigger { padding: 0; }
}

.app {
  width: min(100%, var(--app-shell));
  margin-inline: auto;
  padding: var(--space-2xl) var(--gutter) var(--space-4xl);
}

.home-stack,
.subject-page,
.content-stack,
.studio-page {
  gap: var(--space-2xl);
  animation: none;
}

.primary-button,
.ghost-button,
.back-link,
.subject-tab,
.icon-button,
.studio-button,
.studio-text-button,
.mock-paper-row__open {
  min-height: 2.75rem;
  border-radius: var(--radius-control);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 800;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.primary-button {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-nav-text);
  box-shadow: none;
}

.primary-button:hover {
  border-color: var(--color-brand);
  background: var(--color-brand);
  box-shadow: none;
  transform: translateY(-0.0625rem);
}

.primary-button:active,
.ghost-button:active,
.studio-button:active,
.mock-paper-row__open:active {
  transform: translateY(0.0625rem);
}

.ghost-button,
.icon-button {
  border-color: var(--color-rule-strong);
  background: transparent;
  color: var(--color-ink);
  box-shadow: none;
}

.ghost-button:hover,
.icon-button:hover {
  border-color: var(--color-brand);
  background: var(--color-brand-whisper);
  color: var(--color-brand-strong);
  box-shadow: none;
  transform: none;
}

.catalog-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(24rem, 1.05fr);
  gap: var(--space-3xl);
  align-items: end;
  padding-block: var(--space-xl) var(--space-2xl);
  border-block-end: 0.0625rem solid var(--color-rule);
}

.catalog-intro__copy {
  min-width: 0;
  display: grid;
  gap: var(--space-md);
}

.catalog-intro h1 {
  max-width: 12ch;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(3rem, 6.5vw, 5.5rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 0.96;
  overflow-wrap: anywhere;
}

.catalog-intro p,
.continue-section p,
.catalog-result,
.lane-section__intro p,
.study-directory__head p,
.deck-directory__head p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: 1.55;
}

.catalog-intro__copy p {
  max-width: 34rem;
  font-size: var(--text-md);
}

.catalog-intro__tools {
  min-width: 0;
  display: grid;
  gap: var(--space-sm);
}

.search-field.catalog-search {
  width: 100%;
  max-width: none;
  min-height: 4rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: var(--space-md);
  align-items: center;
  padding-inline: var(--space-lg) var(--space-sm);
  border: 0.125rem solid var(--color-ink);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  box-shadow: none;
}

.search-field.catalog-search:focus-within {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 0.25rem var(--color-brand-soft);
}

.catalog-search .search-field__label {
  color: var(--color-brand-strong);
  font-size: var(--text-sm);
}

.catalog-search input {
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--color-ink);
  font-size: var(--text-md);
  font-weight: 600;
  outline: 0;
  text-overflow: ellipsis;
}

.catalog-search input::placeholder {
  color: var(--color-ink-faint);
  opacity: 1;
}

.catalog-search .icon-button {
  width: 2.75rem;
  padding: 0;
  border: 0;
}

.catalog-search .icon-button svg {
  width: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.catalog-result {
  min-height: 1.5rem;
  padding-inline: var(--space-2xs);
  font-size: var(--text-sm);
  font-weight: 700;
}

.continue-section {
  display: grid;
  gap: var(--space-xl);
  padding: var(--space-xl);
  border-radius: var(--radius-panel);
  background: var(--color-brand-strong);
  color: var(--color-nav-text);
}

.continue-section__head h2,
.catalog-toolbar h2,
.study-directory__head h2,
.deck-directory__head h2 {
  margin: 0;
  color: inherit;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.6rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.05;
}

.continue-section p {
  margin-block-start: var(--space-xs);
  color: var(--color-nav-muted);
}

.continue-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-block-start: 0.0625rem solid var(--color-brand-mid);
}

.continue-grid.is-single {
  grid-template-columns: minmax(0, 1fr);
}

.continue-grid.is-single .continue-item {
  padding-inline-end: 0;
  border-inline-end: 0;
}

.continue-item {
  position: relative;
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-xs) var(--space-lg);
  align-items: end;
  padding: var(--space-xl) var(--space-lg) var(--space-md) 0;
  border: 0;
  border-inline-end: 0.0625rem solid var(--color-brand-mid);
  background: transparent;
  color: var(--color-nav-text);
  text-align: start;
}

.continue-item:nth-child(even) {
  padding-inline-start: var(--space-lg);
  padding-inline-end: 0;
  border-inline-end: 0;
}

.continue-item__programme {
  grid-column: 1 / -1;
  color: var(--color-nav-muted);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.continue-item strong {
  min-width: 0;
  color: var(--color-nav-text);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 650;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.continue-item > span:not(.continue-item__programme):not(.continue-item__meter):not(.continue-item__action) {
  grid-column: 1;
  color: var(--color-nav-muted);
  font-size: var(--text-sm);
}

.continue-item__action {
  grid-column: 2;
  grid-row: 2 / 4;
  align-self: center;
  color: var(--color-nav-text);
  font-size: var(--text-sm);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--color-gold);
  text-decoration-thickness: 0.125rem;
  text-underline-offset: 0.35rem;
  white-space: nowrap;
}

.continue-item__meter {
  grid-column: 1;
  height: 0.25rem;
  overflow: hidden;
  border-radius: var(--radius-pill);
  background: var(--color-brand-mid);
}

.continue-item__meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--color-gold);
}

.catalog-toolbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-xl);
  align-items: center;
}

.catalog-toolbar h2 {
  color: var(--color-ink);
  font-size: var(--text-xl);
  white-space: nowrap;
}

/* The row scrolls sideways, which clips anything outside it; the padding (offset by
   the negative margin) leaves room for the hover lift, its shadow and focus rings. */
.segmented.catalog-filters {
  justify-self: end;
  max-width: calc(100% + 2 * var(--space-2xs));
  gap: var(--space-xs);
  margin: calc(-1 * var(--space-xs)) calc(-1 * var(--space-2xs));
  padding: var(--space-xs) var(--space-2xs);
  border: 0;
  border-radius: 0;
  background: transparent;
}

.catalog-filters button {
  min-height: 2.5rem;
  padding-inline: var(--space-md);
  border: 0.0625rem solid var(--color-rule-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  box-shadow: none;
}

.catalog-filters button:hover {
  border-color: var(--color-brand);
  color: var(--color-brand-strong);
}

.catalog-filters button.is-active {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-nav-text);
  box-shadow: none;
}

.lane-stack {
  gap: var(--space-3xl);
}

.programme-directory {
  display: grid;
  gap: var(--space-xl);
}

.programme-directory__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: end;
  padding-block-end: var(--space-md);
  border-block-end: 0.125rem solid var(--color-ink);
}

.programme-directory__head h2 {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1;
}

.programme-directory__head p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-base);
}

.programme-directory__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--space-2xl);
}

.programme-directory__row {
  min-width: 0;
  min-height: 6.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: center;
  padding: var(--space-lg) 0;
  border: 0;
  border-block-end: 0.0625rem solid var(--color-rule);
  background: transparent;
  color: var(--color-ink);
  text-align: start;
}

.programme-directory__row:hover {
  color: var(--color-brand-strong);
}

.programme-directory__copy {
  min-width: 0;
  display: grid;
  gap: var(--space-xs);
}

.programme-directory__copy strong {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1;
}

.programme-directory__copy span,
.programme-directory__count {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 700;
}

.programme-directory__count {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.lane-section,
.lane-section[data-track="CSEC"],
.lane-section[data-track="CAPE"] {
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.lane-section__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: end;
  margin: 0;
  padding-block-end: var(--space-md);
  border-block-end: 0.125rem solid var(--color-ink);
}

.lane-section__intro {
  min-width: 0;
  display: flex;
  gap: var(--space-md);
  align-items: baseline;
}

.lane-section__intro h2 {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1;
}

.lane-section__intro p {
  font-size: var(--text-sm);
}

.lane-section__count {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  white-space: nowrap;
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--space-2xl);
}

.subject-card,
.subject-card[data-track="CSEC"],
.subject-card[data-track="CAPE"] {
  position: relative;
  min-height: 11.5rem;
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: minmax(0, 1fr) auto auto;
  gap: var(--space-md) var(--space-lg);
  align-items: end;
  padding: var(--space-xl) 0 var(--space-lg);
  overflow: visible;
  border: 0;
  border-block-end: 0.0625rem solid var(--color-rule);
  border-radius: 0;
  background: transparent;
  color: var(--color-ink);
  box-shadow: none;
  text-align: start;
}

.subject-card::before {
  content: "";
  position: absolute;
  inset: var(--space-xs) calc(var(--space-md) * -1);
  z-index: -1;
  border-radius: var(--radius-control);
  background: var(--color-brand-whisper);
  opacity: 0;
  transition: opacity var(--dur-short) var(--ease-out);
}

.subject-card:hover,
.subject-card:focus-visible {
  border-color: var(--color-rule);
  background: transparent;
  box-shadow: none;
  transform: none;
}

.subject-card:hover::before,
.subject-card:focus-visible::before {
  opacity: 1;
}

.subject-card__main {
  min-width: 0;
  display: grid;
  gap: var(--space-sm);
  align-self: start;
}

.subject-card__programme {
  width: max-content;
  color: var(--color-brand-strong);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.subject-card__name {
  min-height: 0;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.12;
  overflow-wrap: anywhere;
}

.subject-card__desc {
  min-height: 0;
  max-width: 58ch;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.45;
  -webkit-line-clamp: 2;
}

.subject-card__footer {
  min-width: 0;
  display: contents;
}

.subject-card__progress-copy {
  grid-column: 1;
  color: var(--color-ink-faint);
  font-size: var(--text-sm);
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.subject-card__action {
  grid-column: 2;
  grid-row: 1 / 4;
  align-self: center;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-brand-strong);
  box-shadow: none;
  font-size: var(--text-sm);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--color-brand-light);
  text-decoration-thickness: 0.125rem;
  text-underline-offset: 0.35rem;
}

.subject-card__action::after {
  content: none;
}

.subject-card__progress {
  grid-column: 1;
  height: 0.1875rem;
  overflow: hidden;
  border-radius: var(--radius-pill);
  background: var(--color-rule);
}

.subject-card__progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--color-brand);
}

.subject-page {
  width: min(100%, 76rem);
  margin-inline: auto;
  display: grid;
  gap: var(--space-xl);
}

.back-link {
  width: max-content;
  min-height: 2rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-ink-soft);
  box-shadow: none;
  text-decoration: underline;
  text-decoration-color: var(--color-rule-strong);
  text-underline-offset: 0.3rem;
}

.back-link:hover {
  color: var(--color-brand-strong);
  box-shadow: none;
  transform: none;
}

.subject-heading {
  min-width: 0;
  display: grid;
  gap: var(--space-md);
  padding-block-end: var(--space-xl);
  border-block-end: 0.0625rem solid var(--color-rule);
}

.subject-heading__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  color: var(--color-ink-faint);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.subject-heading__meta span:first-child {
  color: var(--color-brand-strong);
  font-weight: 800;
}

.subject-heading h1 {
  max-width: 16ch;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 0.98;
  overflow-wrap: anywhere;
}

.subject-heading p {
  max-width: 68ch;
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-md);
  line-height: 1.55;
}

.subject-tabs {
  display: flex;
  gap: var(--space-xl);
  border-block-end: 0.0625rem solid var(--color-rule);
}

.subject-tab {
  position: relative;
  min-height: 3rem;
  justify-content: flex-start;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-ink-soft);
  box-shadow: none;
}

.subject-tab::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: -0.0625rem;
  height: 0.1875rem;
  background: var(--color-brand);
  opacity: 0;
}

.subject-tab:hover,
.subject-tab.is-active {
  border: 0;
  background: transparent;
  color: var(--color-ink);
  box-shadow: none;
  transform: none;
}

.subject-tab.is-active::after {
  opacity: 1;
}

.subject-stage,
.content-stack {
  min-width: 0;
}

.next-step {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-xl);
  align-items: center;
  padding: var(--space-xl);
  border-radius: var(--radius-panel);
  background: var(--color-brand-strong);
  color: var(--color-nav-text);
}

.next-step__copy {
  min-width: 0;
  display: grid;
  gap: var(--space-sm);
}

.next-step h2 {
  margin: 0;
  color: var(--color-nav-text);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.35rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1;
}

.next-step p {
  margin: 0;
  color: var(--color-nav-muted);
  font-size: var(--text-base);
}

.next-step .primary-button {
  border-color: var(--color-nav-text);
  background: var(--color-nav-text);
  color: var(--color-brand-strong);
}

.next-step .primary-button:hover {
  border-color: var(--color-gold-soft);
  background: var(--color-gold-soft);
}

.next-step .progress-meter {
  width: min(100%, 30rem);
  height: 0.25rem;
  margin: var(--space-xs) 0 0;
  background: var(--color-brand-mid);
}

.next-step .progress-meter span {
  background: var(--color-gold);
}

.study-directory,
.deck-directory,
.quiz-directory.panel {
  display: grid;
  gap: var(--space-xl);
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.study-directory__head,
.deck-directory__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: end;
}

.study-directory__head h2,
.deck-directory__head h2 {
  color: var(--color-ink);
}

.study-mode-list,
.deck-table {
  overflow: visible;
  border: 0;
  border-block-start: 0.125rem solid var(--color-ink);
  border-block-end: 0.0625rem solid var(--color-rule);
  border-radius: 0;
  background: transparent;
}

.study-mode-row {
  width: 100%;
  min-height: 6rem;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: center;
  padding: var(--space-lg) 0;
  border: 0;
  border-block-end: 0.0625rem solid var(--color-rule);
  background: transparent;
  color: var(--color-ink);
  text-align: start;
}

.study-mode-row:last-child {
  border-block-end: 0;
}

.study-mode-row:hover {
  color: var(--color-brand-strong);
}

.study-mode-row__number {
  color: var(--color-ink-faint);
  font-family: var(--font-label);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.study-mode-row__copy {
  min-width: 0;
  display: grid;
  gap: var(--space-2xs);
}

.study-mode-row__copy strong {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 650;
}

.study-mode-row__copy span {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.study-mode-row__status {
  color: var(--color-brand-strong);
  font-size: var(--text-sm);
  font-weight: 800;
  white-space: nowrap;
}

.deck-row,
.list-row {
  min-height: 5rem;
  padding: var(--space-md) 0;
  border: 0;
  border-block-end: 0.0625rem solid var(--color-rule);
  background: transparent;
}

.deck-row:last-child,
.list-row:last-child {
  border-block-end: 0;
}

.deck-row__body strong,
.list-row strong {
  color: var(--color-ink);
  font-size: var(--text-base);
  line-height: 1.3;
}

.deck-row__body span,
.list-row__body span,
.deck-row__status,
.list-row__status {
  color: var(--color-ink-faint);
  font-size: var(--text-sm);
}

.deck-toolbar {
  justify-content: flex-end;
}

.study-header {
  align-items: center;
  padding-block-end: var(--space-md);
  border-block-end: 0.0625rem solid var(--color-rule);
}

.study-header__copy .panel__title,
.quiz-stage__copy h2,
.quiz-directory .panel__title {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.6rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.025em;
}

.study-actions {
  gap: var(--space-sm);
}

.flashcard-suite {
  justify-items: center;
}

.flashcard-reader {
  width: min(100%, 62rem);
}

.flip-card-scene {
  width: 100%;
  max-width: 62rem;
  height: clamp(36rem, 72svh, 42rem);
}

.flip-card {
  transition: transform 650ms var(--ease-in-out);
}

.flip-card__face {
  gap: var(--space-lg);
  padding: clamp(var(--space-xl), 4vw, var(--space-2xl));
  border-radius: var(--radius-panel);
  box-shadow: none;
}

.flip-card__body {
  width: 100%;
}

.flip-card__face--front {
  border: 0.125rem solid var(--color-ink);
  background: var(--color-surface);
}

.flip-card__face--back {
  border: 0.125rem solid var(--color-brand-mid);
  background: var(--color-ink);
  color: var(--color-nav-text);
}

.flip-card__question {
  max-width: 28ch;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.12;
}

.flip-card__answer,
.flip-card__answer--concise {
  color: var(--color-nav-text);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.7vw, 1.5rem);
  font-style: normal;
  line-height: 1.5;
}

.flip-card__answer--concise {
  width: 100%;
  max-width: 52ch;
  text-wrap: pretty;
}

.flip-card__expanded {
  border-color: var(--color-brand-mid);
}

.flip-card__expanded > span {
  color: var(--color-nav-muted);
}

.flip-card__deeper {
  border-color: var(--color-brand-light);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-nav-text);
}

.flip-card__deeper:hover {
  border-color: var(--color-nav-text);
  background: var(--color-nav-hover);
  transform: none;
}

.flip-card__hint {
  border: 0;
  border-radius: var(--radius-control);
  background: var(--color-surface-muted);
}

.quiz-panel,
.result-panel {
  padding: var(--space-xl);
  border: 0.125rem solid var(--color-ink);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  box-shadow: none;
}

.quiz-panel__question {
  max-width: 34ch;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.5vw, 2.6rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.quiz-timer {
  border-radius: var(--radius-control);
  background: var(--color-ink);
  color: var(--color-nav-text);
  box-shadow: none;
}

.quiz-timer.is-low {
  box-shadow: none;
}

.option {
  border-color: var(--color-rule-strong);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-ink);
}

.option:hover {
  border-color: var(--color-brand);
  background: var(--color-brand-whisper);
}

.option.is-selected {
  border-color: var(--color-brand);
  background: var(--color-surface-brand);
}

.option.is-correct {
  border-color: var(--color-green);
  background: var(--color-green-soft);
  color: var(--color-green);
}

.option.is-wrong {
  border-color: var(--color-red);
  background: var(--color-red-soft);
  color: var(--color-red);
}

.feedback {
  border-color: var(--color-rule);
  border-radius: var(--radius-control);
  background: var(--color-surface-muted);
  color: var(--color-ink-soft);
}

body[data-study-mode="true"] .topbar__tools,
body[data-study-mode="true"] .topbar__account {
  display: none;
}

body[data-study-mode="true"] .topbar__right {
  display: none;
}

body[data-study-mode="true"] .topbar__inner {
  min-height: 3.75rem;
  grid-template-columns: auto;
}

body[data-study-mode="true"] .brand__eyebrow,
body[data-study-mode="true"] .subject-heading {
  display: none;
}

body[data-study-mode="true"] .app {
  padding-block-start: var(--space-xl);
}

.studio-page,
.project-page {
  color: var(--color-ink);
  font-family: var(--font-body);
}

.studio-hero {
  min-height: 0;
  padding: var(--space-xl);
  border: 0;
  border-radius: var(--radius-panel);
  background: var(--color-surface-brand);
  box-shadow: none;
}

.studio-hero::after {
  display: none;
}

.studio-hero h1 {
  max-width: 16ch;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 0.98;
}

.studio-hero p {
  max-width: 62ch;
  color: var(--color-ink-soft);
  font-size: var(--text-base);
}

.studio-kicker {
  border-radius: var(--radius-control);
}

.mock-library-page .studio-hero {
  min-height: 11rem;
  align-content: center;
  background: var(--color-surface-brand);
}

.mock-library-page .studio-hero::before {
  inset-block-start: var(--space-md);
  inset-inline-end: var(--space-lg);
  color: var(--color-brand-soft);
  font-family: var(--font-display);
  font-size: clamp(3.25rem, 8vw, 6.5rem);
  font-style: normal;
  font-weight: 650;
  opacity: 0.55;
}

.mock-level-tabs {
  display: flex;
  gap: var(--space-xs);
  overflow-x: auto;
  padding-block-end: var(--space-xs);
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.mock-level-tabs button {
  min-width: 10rem;
  min-height: 3.5rem;
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto;
  gap: var(--space-xs) var(--space-md);
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  border: 0.0625rem solid var(--color-rule-strong);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-ink);
}

.mock-level-tabs button::after,
.mock-level-tabs small {
  display: none;
}

.mock-level-tabs button:hover {
  border-color: var(--color-brand);
  background: var(--color-brand-whisper);
}

.mock-level-tabs button.is-active {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-nav-text);
}

.mock-level-tabs strong {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 800;
}

.mock-level-tabs b {
  grid-column: 2;
  grid-row: 1;
  color: var(--color-brand-strong);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.mock-level-tabs .is-active b {
  color: var(--color-nav-muted);
}

.mock-browser {
  grid-template-columns: minmax(13rem, 0.28fr) minmax(0, 1fr);
  overflow: hidden;
  border: 0.0625rem solid var(--color-rule);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  box-shadow: none;
}

.mock-subjects {
  padding: var(--space-lg) var(--space-md);
  border-inline-end: 0.0625rem solid var(--color-rule);
  background: var(--color-surface-muted);
}

.mock-browser__label {
  color: var(--color-ink-faint);
}

.mock-browser__label b {
  border-radius: var(--radius-control);
  background: var(--color-surface-brand);
  color: var(--color-brand-strong);
}

.mock-subjects__list button {
  min-height: 2.75rem;
  border-radius: var(--radius-control);
  color: var(--color-ink-soft);
}

.mock-subjects__list button:hover {
  background: var(--color-surface);
  color: var(--color-ink);
  transform: none;
}

.mock-subjects__list button.is-active {
  background: var(--color-ink);
  color: var(--color-nav-text);
  box-shadow: none;
}

.mock-papers {
  padding: var(--space-xl);
}

.mock-papers__head {
  padding-block-end: var(--space-lg);
  border-color: var(--color-rule);
}

.mock-papers__head h2 {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
}

.mock-search input {
  border-color: var(--color-rule-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface-muted);
  color: var(--color-ink);
}

.mock-paper-row {
  border-color: var(--color-rule);
}

.mock-paper-row__copy h3 {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
}

.mock-paper-row__open {
  border-color: var(--color-rule-strong);
  background: transparent;
  color: var(--color-ink);
  box-shadow: none;
}

.mock-paper-row__open:hover {
  border-color: var(--color-brand);
  background: var(--color-brand-whisper);
  color: var(--color-brand-strong);
}

.mock-paper-row__actions,
.mock-reader__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-xs);
  min-width: 0;
}

.mock-paper-row__open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 var(--space-md);
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
}

.mock-reader__actions .studio-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  text-decoration: none;
}

.mock-document,
.mock-document * {
  -webkit-user-select: text;
  user-select: text;
}

.mock-document ::selection {
  background: var(--color-brand-soft);
  color: var(--color-ink);
}

.mock-reader__body {
  display: grid;
  width: min(100%, var(--reader-width));
  min-width: 0;
  margin-inline: auto;
}

.mock-reader__body--exam {
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 21rem);
  align-items: start;
  gap: var(--space-lg);
}

.mock-reader__body .mock-document { width: 100%; min-width: 0; }

.pdf-paper-viewer {
  display: block;
  width: 100%;
  min-height: 70vh;
  background: var(--color-surface-muted);
}

.pdf-paper-viewer__status {
  margin: 0;
  padding: var(--space-md);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

/* EmbedPDF mounts its own container element inside this host. */
.pdf-paper-viewer embedpdf-container {
  display: block;
  width: 100%;
  height: min(88vh, 1400px);
  min-height: 70vh;
}

.mock-answer-dock {
  position: sticky;
  top: 5.5rem;
  display: grid;
  align-content: start;
  gap: var(--space-md);
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  padding: var(--space-lg);
  border: 1px solid var(--color-rule-strong);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  color: var(--color-ink);
}

.mock-answer-dock h2 {
  margin: 0;
  font: 650 1.55rem/1.1 var(--font-display);
}

.mock-answer-dock p { margin: 0; line-height: 1.5; }
.mock-answer-dock__note { color: var(--color-ink-soft); font-size: var(--text-sm); }
.mock-answer-dock__head { display: flex; align-items: start; justify-content: space-between; gap: var(--space-sm); }
.mock-answer-dock__head .exam-timer { flex: none; min-width: 7.5rem; }

.mock-answer-dock__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  max-height: 8rem;
  overflow-y: auto;
  padding-block: var(--space-xs);
  border-block: 1px solid var(--color-rule);
}

.mock-answer-dock__list button {
  min-height: 2.5rem;
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-rule-strong);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-ink);
  font-weight: 800;
}

.mock-answer-dock__list button.is-active { background: var(--color-ink); color: var(--color-nav-text); }

.mock-answer-dock__field { display: grid; gap: var(--space-xs); font-weight: 800; }
.mock-answer-dock__field input,
.mock-answer-dock__field textarea {
  width: 100%;
  min-width: 0;
  padding: var(--space-sm);
  border: 1px solid var(--color-rule-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: 1rem;
  font-weight: 400;
}

.mock-answer-dock__field input { min-height: 2.75rem; }
.mock-answer-dock__field textarea { min-height: 13rem; resize: vertical; line-height: 1.5; }
.mock-answer-dock__footer { display: grid; gap: var(--space-xs); color: var(--color-ink-soft); font-size: var(--text-sm); }
.mock-answer-dock__saved { display: grid; gap: var(--space-md); }
.mock-answer-dock__saved section { display: grid; gap: var(--space-xs); padding-block: var(--space-md); border-block-end: 1px solid var(--color-rule); }
.mock-answer-dock__saved p { white-space: pre-wrap; overflow-wrap: anywhere; }

@media (max-width: 56rem) {
  .mock-reader__body--exam { grid-template-columns: minmax(0, 1fr); }
  .mock-answer-dock { position: static; order: -1; max-height: none; }
}

@media (max-width: 48rem) {
  .mock-paper-row__actions { grid-column: 2; justify-content: flex-start; }
  .mock-reader__actions { justify-content: flex-start; }
}

/* The landing page's gold diamond becomes a small, already-visible punctuation moment. */
@keyframes kandeur-gold-punctuation {
  from {
    opacity: 0.68;
    transform: translateX(-0.5rem) rotate(18deg) scale(0.78);
  }
  to {
    opacity: 1;
    transform: translateX(0) rotate(45deg) scale(1);
  }
}

.catalog-intro__copy::after {
  content: "";
  width: 0.75rem;
  height: 0.75rem;
  display: block;
  margin-block-start: var(--space-lg);
  border-radius: 0.125rem;
  background: var(--color-gold);
  animation: kandeur-gold-punctuation 520ms var(--ease-out) both;
}

/* SBA: one editorial work surface, ruled workflow rows, shared control scale. */
.studio-page,
.project-page {
  --studio-accent: var(--color-brand);
  --studio-accent-soft: var(--color-surface-brand);
  --studio-accent-border: var(--color-rule-strong);
}

.studio-section {
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.studio-section__head {
  margin-block-end: var(--space-md);
  padding-block-end: var(--space-md);
  border-block-end: 0.125rem solid var(--color-ink);
}

.studio-principles {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  padding: 0;
  border: 0;
  border-block: 0.0625rem solid var(--color-rule);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.studio-principles > div {
  min-height: 0;
  padding: var(--space-lg);
  border: 0;
  border-inline-end: 0.0625rem solid var(--color-rule);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.studio-principles > div:last-child {
  border-inline-end: 0;
}

.studio-principles strong {
  margin-block: var(--space-lg) var(--space-xs);
}

.project-list,
.setup-sheet,
.project-top,
.brief-lead,
.brief-block,
.draft-nav,
.draft-editor,
.draft-feedback,
.history-sheet,
.export-sheet,
.export-preview,
.paper-preview,
.mock-reader__masthead,
.mock-reader__tools {
  border-color: var(--color-rule);
  border-radius: var(--radius-panel);
  background-color: var(--color-surface);
  background-image: none;
  box-shadow: none;
}

.setup-sheet {
  border-radius: var(--radius-panel);
}

.setup-sheet__number {
  background: var(--color-surface-brand);
}

.studio-field input,
.studio-field select,
.studio-textarea,
.studio-field--editor textarea,
.sba-dropzone,
.sba-dropzone__mark,
.project-tabs,
.project-tabs button,
.criterion-row,
.draft-nav__list button,
.draft-purpose,
.studio-check {
  border-radius: var(--radius-control);
  background-image: none;
  box-shadow: none;
}

.sba-dropzone {
  background: var(--color-surface-muted);
  transform: none;
}

.sba-dropzone:hover {
  border-color: var(--color-brand);
  box-shadow: none;
  transform: none;
}

.project-tabs {
  border: 0;
  border-block-end: 0.0625rem solid var(--color-rule);
  background: transparent;
}

.project-tabs button {
  border: 0;
  border-block-end: 0.125rem solid transparent;
  background: transparent;
}

.project-tabs button.is-active {
  border-color: var(--color-brand);
  background: transparent;
  color: var(--color-brand-strong);
}

.studio-kicker {
  display: none;
}

.studio-button--primary {
  box-shadow: none;
}

/* Tutor: compact overlay, flat workflow rows, no separate decorative visual system. */
.ai-tutor-root {
  --tutor-radius-panel: var(--radius-panel);
  --tutor-radius-card: var(--radius-control);
  --tutor-radius-field: var(--radius-control);
  --tutor-shadow-lift: none;
  --tutor-shadow-card: none;
}

.ai-tutor-launcher,
.ai-selection-popover {
  border-radius: var(--radius-control);
  background: var(--color-ink);
  box-shadow: none;
}

.ai-tutor-launcher:hover {
  background: var(--color-brand-strong);
  box-shadow: none;
  transform: translateY(-0.0625rem);
}

.ai-tutor-launcher__mark {
  border-radius: var(--radius-control);
  background: var(--color-brand);
  box-shadow: none;
}

.ai-tutor-panel {
  border-color: var(--color-rule-strong);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  box-shadow: 0 18px 48px rgba(29, 19, 51, 0.18);
}

.ai-tutor-panel * {
  background-image: none !important;
  box-shadow: none;
}

.ai-tutor-head,
.ai-tutor-context,
.tt-subjectbar,
.tt-modebar,
.ai-tutor-messages,
.ai-tutor-prompts-wrap,
.ai-tutor-compose {
  background: var(--color-surface);
}

.ai-tutor-context {
  border-color: var(--color-rule);
  background: var(--color-surface-muted);
}

.ai-tutor-close,
.ai-tutor-context__status,
.ai-tutor-selection,
.tt-subjectbar__select,
.tt-mode,
.tt-btn,
.tt-chip,
.tt-style,
.tt-field,
.tt-onboard__subject,
.tt-practice__option,
.tt-practice__hint,
.tt-review__item,
.ai-tutor-prompts button,
.ai-tutor-input-row,
.ai-tutor-send,
.ai-tutor-message {
  border-radius: var(--radius-control);
}

.tt-modebar {
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-lg);
  overflow-x: auto;
  border-block-end: 0.0625rem solid var(--color-rule);
}

.tt-mode {
  min-height: 2.25rem;
  border: 0;
  border-block-end: 0.125rem solid transparent;
  background: transparent;
}

.tt-mode.is-active {
  border-color: var(--color-brand);
  background: transparent;
  color: var(--color-brand-strong);
}

.ai-tutor-messages {
  padding: var(--space-lg);
}

.ai-tutor-empty,
.tt-onboard,
.tt-practice,
.tt-lesson,
.tt-review,
.tt-plan,
.tt-subject-manager {
  border: 0;
  border-radius: 0;
  background: transparent;
}

.ai-tutor-prompts-wrap {
  padding: var(--space-sm) var(--space-lg);
  border-block-start: 0.0625rem solid var(--color-rule);
}

/* Suggested prompts wrap as outlined chips so every one reads as a button at rest. */
.ai-tutor-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  overflow: visible;
  padding: 0;
}

.ai-tutor-prompts button {
  flex: 0 1 auto;
  max-width: 100%;
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border: 0.0625rem solid var(--color-rule-strong);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  box-shadow: none;
  text-align: start;
  white-space: normal;
}

.ai-tutor-prompts button::after {
  content: "→";
  color: var(--color-brand);
  font-weight: 700;
  transition: transform var(--dur-short) var(--ease-out);
}

.ai-tutor-prompts button:hover {
  border-color: var(--color-brand);
  background: var(--color-brand-whisper);
  box-shadow: none;
}

.ai-tutor-prompts button:hover::after {
  transform: translateX(0.125rem);
}

.ai-tutor-prompt__title {
  color: var(--color-ink);
  font: 700 var(--text-sm) / 1.3 var(--font-body);
}

/* `.ai-tutor-panel *` strips gradients, so anything whose only colour was a
   gradient needs a solid fill here or it renders blank. */
.ai-tutor-send {
  background-color: var(--color-ink);
}

.ai-tutor-send:hover {
  background-color: var(--color-brand);
}

.tt-lesson__bar-fill,
.tt-onboard__progress span.is-done {
  background-color: var(--color-brand);
}

/* Header: status appears only when the tutor needs attention. */
.ai-tutor-head__status {
  margin-inline-start: auto;
}

/* Subject bar: a compact context line, not a second header. */
.tt-subjectbar {
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-lg);
  border-block-end: 0;
}

.tt-subjectbar strong {
  font: 650 1.05rem / 1.3 var(--font-display);
}

.tt-subjectbar .tt-subjectbar__manage {
  min-height: 2.25rem;
  padding: 0 var(--space-sm);
  font-size: var(--text-sm);
}

/* Modes: underlined text tabs on one rule. */
.ai-tutor-panel .tt-modebar {
  gap: var(--space-lg);
  margin: 0;
  padding: 0 var(--space-lg);
  border: 0;
  border-block-end: 0.0625rem solid var(--color-rule);
  border-radius: 0;
  background: var(--color-surface);
  box-shadow: none;
}

.ai-tutor-panel .tt-mode {
  flex: 0 0 auto;
  min-height: 2.75rem;
  margin-block-end: -0.0625rem;
  padding: 0;
  border: 0;
  border-block-end: 0.125rem solid transparent;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: var(--color-ink-faint);
  font: 700 var(--text-sm) / 1 var(--font-body);
  overflow: visible;
}

.ai-tutor-panel .tt-mode:hover {
  background: transparent;
  color: var(--color-ink);
}

.ai-tutor-panel .tt-mode.is-active {
  border-color: var(--color-ink);
  background: transparent;
  box-shadow: none;
  color: var(--color-ink);
}

/* Review rows carry their own actions; the row itself is not a button. */
.tt-review__item,
.tt-review__item:hover {
  border-color: var(--color-rule);
  transform: none;
  box-shadow: none;
}

.tt-review__item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: var(--space-2xs) 0 0;
}

.tt-review__item-actions .tt-btn {
  min-height: 2.5rem;
  padding: 0 var(--space-md);
}

/* Lesson header: subject eyebrow above the topic title. */
.tt-lesson__meta {
  display: grid;
  justify-content: start;
  gap: var(--space-3xs);
}

.tt-plan__standfirst .tt-plan__focus-link {
  margin-inline-start: var(--space-2xs);
}

.ai-tutor-panel,
.flashcard-navigator,
.flashcard-browser,
.ai-selection-popover {
  animation: none;
}

.ai-tutor-message[data-role="user"] {
  background: var(--color-ink);
  color: var(--color-nav-text);
}

.ai-tutor-message[data-role="assistant"] {
  border: 0.0625rem solid var(--color-rule);
  background: var(--color-surface-muted);
  color: var(--color-ink);
}

@media (max-width: 70rem) {
  .catalog-intro {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-xl);
  }

  .catalog-intro h1 {
    max-width: 14ch;
  }

  .catalog-toolbar {
    grid-template-columns: minmax(0, 1fr);
  }

  .segmented.catalog-filters {
    justify-self: stretch;
  }

  .mock-papers__head {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 52rem) {
  .topbar__inner {
    min-height: 4rem;
    gap: var(--space-md);
    padding-inline: var(--space-md);
  }

  .topbar__right {
    gap: var(--space-sm);
  }

  .topbar__tools {
    justify-self: stretch;
    gap: var(--space-md);
    overflow-x: auto;
  }

  .topbar__tools button {
    flex: 0 0 auto;
  }

  .app {
    padding: var(--space-xl) var(--space-md) var(--space-3xl);
  }

  .continue-grid,
  .subject-grid,
  .programme-directory__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .continue-item,
  .continue-item:nth-child(even) {
    padding-inline: 0;
    border-inline-end: 0;
    border-block-end: 0.0625rem solid var(--color-brand-mid);
  }

  .continue-item:last-child {
    border-block-end: 0;
  }

  .lane-section__intro {
    display: grid;
    gap: var(--space-xs);
  }

  .subject-card {
    min-height: 10rem;
  }

  .next-step {
    grid-template-columns: minmax(0, 1fr);
  }

  .next-step .primary-button {
    width: max-content;
  }

  .study-directory__head,
  .deck-directory__head {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-xs);
  }

  .mock-browser {
    grid-template-columns: minmax(0, 1fr);
  }

  .mock-subjects {
    border-inline-end: 0;
    border-block-end: 0.0625rem solid var(--color-rule);
  }

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

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

  .studio-principles > div:nth-child(2) {
    border-inline-end: 0;
  }

  .studio-principles > div:nth-child(-n + 2) {
    border-block-end: 0.0625rem solid var(--color-rule);
  }
}

@media (max-width: 38rem) {
  .topbar__inner {
    min-height: 0;
    grid-template-columns: auto minmax(0, 1fr);
    padding-block: var(--space-xs);
  }

  .topbar__right {
    display: contents;
  }

  .topbar__account {
    justify-self: end;
  }

  .topbar__tools {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: stretch;
    padding-block-start: var(--space-2xs);
  }

  body[data-study-mode="true"] .topbar__inner {
    display: grid;
  }

  .catalog-intro {
    padding-block-start: var(--space-md);
  }

  .catalog-intro h1,
  .subject-heading h1 {
    font-size: clamp(2.6rem, 14vw, 4rem);
  }

  .search-field.catalog-search {
    min-height: 3.5rem;
    gap: var(--space-sm);
    padding-inline-start: var(--space-md);
  }

  .catalog-search .search-field__label {
    position: absolute;
    width: 0.0625rem;
    height: 0.0625rem;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .continue-section,
  .next-step,
  .quiz-panel,
  .result-panel,
  .studio-hero,
  .mock-papers {
    padding: var(--space-lg);
  }

  .catalog-toolbar h2 {
    white-space: normal;
  }

  .lane-section__head {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-sm);
  }

  .lane-section__count {
    justify-self: start;
  }

  .subject-card {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto auto;
  }

  .subject-card__action {
    grid-column: 1;
    grid-row: auto;
    justify-self: start;
  }

  .subject-card__progress {
    grid-column: 1;
  }

  .subject-tabs {
    gap: var(--space-lg);
    overflow-x: auto;
  }

  .study-mode-row {
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: var(--space-md);
  }

  .study-mode-row__status {
    grid-column: 2;
  }

  .deck-row,
  .list-row {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-sm);
  }

  .deck-row .ghost-button,
  .deck-row .primary-button,
  .list-row .ghost-button,
  .list-row .primary-button {
    width: 100%;
  }

  .study-header {
    align-items: stretch;
  }

  body[data-study-mode="true"] .content-stack:has(.flashcard-suite) {
    display: flex;
    flex-direction: column;
  }

  body[data-study-mode="true"] .content-stack:has(.flashcard-suite) .flashcard-suite {
    order: -2;
  }

  body[data-study-mode="true"] .content-stack:has(.flashcard-suite) .flashcard-scopebar {
    order: -1;
  }

  body[data-study-mode="true"] .content-stack:has(.flashcard-suite) .study-header {
    padding-block-start: var(--space-md);
    border-block-start: 0.0625rem solid var(--color-rule);
    border-block-end: 0;
  }

  body[data-study-mode="true"] .content-stack:has(.flashcard-suite) .study-header__copy {
    display: none;
  }

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

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

  .study-actions button:last-child {
    grid-column: 1 / -1;
  }

  .flip-card-scene,
  .flip-card {
    width: 100%;
    max-width: 100%;
    height: clamp(21rem, 54svh, 28rem);
    min-height: 0;
  }

  .flip-card__face {
    padding: var(--space-lg);
  }

  .mock-subjects__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .mock-paper-row {
    grid-template-columns: 2rem minmax(0, 1fr);
  }

  .mock-paper-row__open {
    grid-column: 2;
    justify-self: start;
  }

  .programme-directory__head {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-xs);
  }

  .programme-directory__row {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-sm);
  }

  .programme-directory__count {
    white-space: normal;
  }

  .studio-principles {
    grid-template-columns: minmax(0, 1fr);
  }

  .studio-principles > div,
  .studio-principles > div:nth-child(2),
  .studio-principles > div:nth-child(-n + 2) {
    border-inline-end: 0;
    border-block-end: 0.0625rem solid var(--color-rule);
  }

  .studio-principles > div:last-child {
    border-block-end: 0;
  }

  .ai-tutor-panel {
    inset: var(--space-sm);
    width: auto;
    height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}