.study-page-root {
  --card-prompt-size: 1.92rem;
  --card-prompt-line: 1.28;
  --study-card-face-background: linear-gradient(135deg, rgb(50 22 103), rgb(79 33 129) 56%, rgb(96 39 151));
  --deck-stack-a: linear-gradient(135deg, rgba(50, 25, 109, 0.96), rgba(110, 49, 169, 0.92) 56%, rgba(171, 76, 214, 0.84));
  --deck-stack-b: linear-gradient(135deg, rgba(77, 43, 145, 0.92), rgba(137, 64, 200, 0.88) 56%, rgba(198, 97, 232, 0.82));
  --deck-stack-shadow: 0 8px 18px rgba(4, 3, 16, 0.20), 0 0 8px rgba(167,120,255,0.07);
  --study-card-layer-shadow: var(--deck-stack-shadow, var(--deck-shadow));
  --study-card-layer-before-inset: 16px 14px 16px 14px;
  --study-card-layer-before-transform: translate(-2px, 6px) rotate(-3deg);
  --study-card-layer-before-opacity: 0.18;
  --study-card-layer-after-inset: 15px 13px 15px 13px;
  --study-card-layer-after-transform: translate(2px, 5px) rotate(2.4deg);
  --study-card-layer-after-opacity: 0.23;
}

.study-page-root .prompt {
  font-size: var(--card-prompt-size);
  line-height: var(--card-prompt-line);
  margin: 0 0 12px;
  padding-block: 0;
  font-weight: 500;
}
.study-page-root #card-body :where(p, ul, ol, blockquote) {
  margin: 0;
}
.study-page-root #card-body :where(p, ul, ol, blockquote) + :where(p, ul, ol, blockquote) {
  margin-top: 0.5em;
}
.study-page-root #card-body :where(h1, h2, h3, h4, h5, h6) {
  margin: 0 0 0.2em;
  line-height: 1.18;
}
.study-page-root #card-body > :first-child {
  margin-top: 0;
}
.study-page-root #card-body > :last-child {
  margin-bottom: 0;
}
.study-page-root #card-body :where(p, div, li, blockquote, span) {
  font-size: inherit;
  line-height: inherit;
}

:root[data-theme="light"] .study-page-root,
.study-page-root[data-theme="light"] {
  --study-card-face-background: linear-gradient(135deg, #ffffff, #f8f1ff 56%, #efe4ff);
  --deck-stack-a: linear-gradient(135deg, rgba(193, 157, 255, 0.76), rgba(166, 123, 242, 0.72) 56%, rgba(147, 96, 230, 0.62));
  --deck-stack-b: linear-gradient(135deg, rgba(228, 208, 255, 0.76), rgba(198, 164, 250, 0.70) 56%, rgba(169, 129, 238, 0.62));
  --deck-stack-shadow: 0 8px 16px rgba(64, 42, 113, 0.11), 0 0 7px rgba(130, 82, 226, 0.05);
}

.card-shell {
  grid-column: 1 / 2;
  background: transparent;
  border-radius: 0;
  border: 0;
  padding: var(--study-card-shell-padding, 14px 18px 18px);
  box-shadow: none;
  display: grid;
  grid-template-rows: auto var(--study-card-shell-card-track, minmax(0, 1fr)) auto auto;
  align-content: var(--study-card-shell-align-content, stretch);
  gap: var(--study-card-shell-gap, 20px);
  overflow: visible;
  height: 100%;
  min-height: 0;
  position: relative;
}
.study-page-root.embedded-page {
  --study-mounted-sidebar-width: 320px;
  --study-stage-max: 1240px;
  --study-stage-inline-width: min(100%, var(--study-stage-max));
  --study-card-shell-padding: 0 0 10px;
  --study-card-shell-gap: 14px;
  --study-card-shell-card-track: minmax(0, 1fr);
  --study-card-shell-align-content: stretch;
  --study-card-align-self: stretch;
  --study-face-inset: var(--study-embedded-face-inset, 14px);
  --study-option-gap: 14px;
  --study-option-row-gap: 14px;
  --study-option-toggle-size: 44px;
  --study-option-pad-y: 16px;
  --study-option-pad-x: 24px;
  --study-trust-chip-gap: 8px;
  --study-trust-chip-margin-bottom: 10px;
  --study-trust-chip-padding: 5px 8px;
  --study-trust-chip-font-size: 0.74rem;
  --deck-shadow: 0 18px 32px rgba(50, 70, 115, 0.12), 0 6px 14px rgba(50, 70, 115, 0.08);
}
.study-page-root.focus-mode,
.study-page-root.assignment-focus-mode {
  --focus-mode-inset: clamp(12px, 2vw, 24px);
  padding: var(--focus-mode-inset);
  box-sizing: border-box;
  overflow: hidden;
  background: var(--bg);
}
.study-page-root.focus-mode .app,
.study-page-root.assignment-focus-mode .app {
  width: 100%;
  max-width: none;
  height: 100%;
  min-height: 100%;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  gap: 0;
}
.study-page-root.focus-mode .study-sidebar,
.study-page-root.focus-mode .focused-study-sidebar,
.study-page-root.assignment-focus-mode .study-sidebar,
.study-page-root.assignment-focus-mode .focused-study-sidebar,
.study-page-root.focus-mode .floating-admin-link,
.study-page-root.assignment-focus-mode .floating-admin-link {
  display: none !important;
}
.study-page-root.focus-mode .card-shell,
.study-page-root.assignment-focus-mode .card-shell {
  grid-column: 1 / -1;
  height: 100%;
  max-height: none;
  padding: 18px clamp(16px, 2vw, 28px) 20px;
  justify-items: center;
  align-content: start;
}
.study-page-root.focus-mode .progress,
.study-page-root.focus-mode .card,
.study-page-root.focus-mode .session-tray,
.study-page-root.focus-mode .actions,
.study-page-root.assignment-focus-mode .progress,
.study-page-root.assignment-focus-mode .card,
.study-page-root.assignment-focus-mode .session-tray,
.study-page-root.assignment-focus-mode .actions {
  width: min(100%, 1120px);
}
.study-page-root.focus-mode .card,
.study-page-root.assignment-focus-mode .card {
  min-height: clamp(500px, 76dvh, 860px);
}
:root[data-theme="light"] .study-page-root.focus-mode,
:root[data-theme="light"] .study-page-root.assignment-focus-mode,
.study-page-root[data-theme="light"].focus-mode,
.study-page-root[data-theme="light"].assignment-focus-mode {
  background: linear-gradient(180deg, #f8fbff 0%, #eef4ff 100%) !important;
  color: #17233f;
}
:root[data-theme="light"] .study-page-root.focus-mode .progress,
:root[data-theme="light"] .study-page-root.assignment-focus-mode .progress,
.study-page-root[data-theme="light"].focus-mode .progress,
.study-page-root[data-theme="light"].assignment-focus-mode .progress {
  color: rgba(52, 77, 122, 0.78);
}
:root[data-theme="light"] .study-page-root.focus-mode .bar,
:root[data-theme="light"] .study-page-root.assignment-focus-mode .bar,
.study-page-root[data-theme="light"].focus-mode .bar,
.study-page-root[data-theme="light"].assignment-focus-mode .bar {
  background: rgba(132, 155, 213, 0.18);
}
:root[data-theme="light"] .study-page-root.focus-mode .embedded-study-actions,
:root[data-theme="light"] .study-page-root.focus-mode .actions,
:root[data-theme="light"] .study-page-root.assignment-focus-mode .embedded-study-actions,
:root[data-theme="light"] .study-page-root.assignment-focus-mode .actions,
.study-page-root[data-theme="light"].focus-mode .embedded-study-actions,
.study-page-root[data-theme="light"].focus-mode .actions,
.study-page-root[data-theme="light"].assignment-focus-mode .embedded-study-actions,
.study-page-root[data-theme="light"].assignment-focus-mode .actions {
  background: rgba(255, 255, 255, 0.82);
  border-color: rgba(132, 155, 213, 0.28);
  box-shadow: 0 18px 46px rgba(64, 42, 113, 0.14);
}
@media (max-width: 900px) {
  .study-page-root.focus-mode .card-shell,
  .study-page-root.assignment-focus-mode .card-shell {
    padding-inline: 12px;
  }
}
.study-page-root.embedded-page .card-shell {
  align-self: stretch;
  height: 100%;
  min-height: 0;
  max-height: 100%;
  width: 100%;
  justify-items: stretch;
  align-content: stretch;
  overflow: visible;
}
.study-page-root.embedded-page .card-shell > .study-progress-stack,
.study-page-root.embedded-page .card-shell > .progress,
.study-page-root.embedded-page .card-shell > .card,
.study-page-root.embedded-page .card-shell > .session-tray,
.study-page-root.embedded-page .card-shell > .actions {
  width: min(100%, var(--study-stage-inline-width));
  margin-inline: 0;
  justify-self: start;
  align-self: start;
}
.study-page-root.embedded-page .card-shell > .card {
  align-self: stretch;
}
.study-page-root.embedded-page:not(.assignment-page) .card-shell {
  grid-template-areas:
    "progress"
    "card"
    "."
    "tray"
    "actions";
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
}
.study-page-root.embedded-page:not(.assignment-page) .card-shell > .study-progress-stack,
.study-page-root.embedded-page:not(.assignment-page) .card-shell > .progress {
  grid-area: progress;
}
.study-page-root.embedded-page:not(.assignment-page) .card-shell > .card {
  grid-area: card;
}
.study-page-root.embedded-page:not(.assignment-page) .card-shell > .session-tray {
  grid-area: tray;
}
.study-page-root.embedded-page:not(.assignment-page) .card-shell > .actions {
  grid-area: actions;
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) {
  --sidebar-control-height: 48px;
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .app {
  grid-template-columns: var(--study-mounted-sidebar-width) minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  gap: clamp(22px, 2vw, 32px);
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-sidebar {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  min-width: 0;
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .card-shell {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  min-width: 0;
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-bar-pills,
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .deck-controls,
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .deck-metrics,
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-sidebar-group {
  gap: 10px;
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-timer-row {
  grid-template-columns: minmax(0, 1fr) 76px 48px;
  gap: 10px;
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-timer-pill {
  padding-inline: 12px !important;
}
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-sidebar .pill:not(.study-timer-pill),
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-sidebar button,
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-sidebar .searchable-select-trigger,
.study-page-root.embedded-page:not(.focused-study-page):not(.assignment-page) .study-sidebar select {
  font-size: 0.96rem !important;
}
.progress {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}
.study-progress-stack {
  display: var(--study-progress-stack-display, none);
  gap: 8px;
  align-self: start;
}
.study-progress-stack .progress {
  width: 100%;
}
.assignment-header {
  display: none;
  width: var(--study-assignment-header-width, min(100%, var(--study-stage-max)));
  margin: 0 auto;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 78%, transparent 22%);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.16);
}
.assignment-header.is-visible {
  display: grid;
  gap: 0.2rem;
}
.assignment-header span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.assignment-header strong {
  color: var(--text);
  font-size: clamp(1.12rem, 2vw, 1.45rem);
  line-height: 1.16;
}
.options {
  display: grid;
  gap: var(--study-option-gap, 16px);
  margin-top: 0;
  margin-left: 0;
}
.study-page-root.embedded-page .options {
  gap: var(--study-option-gap, 14px);
}
.option-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--study-option-row-gap, 16px);
  align-items: stretch;
  min-width: 0;
}
.study-page-root.embedded-page .option-row {
  gap: var(--study-option-row-gap, 12px);
  align-items: stretch;
}
.option-row > * {
  min-width: 0;
}
.option-btn {
  background: color-mix(in srgb, var(--panel-soft) 90%, transparent);
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--border) 90%, transparent);
  border-radius: 10px;
  padding: var(--study-option-pad-y, var(--card-option-pad-y)) var(--study-option-pad-x, var(--card-option-pad-x));
  font-size: var(--card-option-size, 1.14rem);
  line-height: var(--card-option-line, 1.24);
  min-height: max(
    var(--card-option-min-height, 0px),
    calc(2lh + var(--study-option-pad-y, var(--card-option-pad-y, 14px)) + var(--study-option-pad-y, var(--card-option-pad-y, 14px)))
  );
  height: auto;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  text-align: left;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: normal;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
  box-shadow: none;
  text-shadow: none;
}
.study-page-root.embedded-page .option-btn {
  display: flex;
  align-items: center;
  min-height: max(
    var(--card-option-min-height, 0px),
    calc(2lh + var(--study-option-pad-y, var(--card-option-pad-y, 14px)) + var(--study-option-pad-y, var(--card-option-pad-y, 14px)))
  );
  height: auto;
  border-radius: 8px;
  padding: var(--study-option-pad-y, var(--card-option-pad-y)) var(--study-option-pad-x, var(--card-option-pad-x));
}
.option-btn :where(p, ul, ol, li, div, span, strong, em, b, i, u, mark, a, font) {
  margin: 0;
  text-align: left !important;
  background: transparent !important;
  background-image: none !important;
  color: inherit;
  box-shadow: none !important;
  text-shadow: none !important;
}
.option-btn * {
  background: transparent !important;
  background-image: none !important;
  box-shadow: none !important;
  text-shadow: none !important;
}
.answer :where(p, ul, ol, li, div, span, strong, em, b, i, u, mark, a, font) {
  background: transparent !important;
  background-image: none !important;
  box-shadow: none !important;
  color: inherit;
  text-shadow: none !important;
}
.option-ruleout-toggle {
  width: var(--study-option-toggle-size, 48px);
  min-width: var(--study-option-toggle-size, 48px);
  min-height: var(--study-option-toggle-size, 48px);
  border-radius: 10px;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: none;
  align-self: stretch;
}
.study-page-root.embedded-page .option-ruleout-toggle {
  align-self: stretch;
  border-radius: 8px;
}
.option-ruleout-toggle svg {
  width: 18px;
  height: 18px;
  display: block;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.option-ruleout-toggle .icon-eye-off {
  display: none;
}
.option-ruleout-toggle:hover {
  transform: translateY(-1px);
  color: var(--text);
}
.option-ruleout-toggle:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.option-row.is-ruled-out .option-btn {
  opacity: 0.5;
  filter: grayscale(0.2);
  border-color: rgba(255,255,255,0.08);
  background: rgba(16, 12, 28, 0.48);
  color: rgba(250,246,255,0.72);
  box-shadow: none;
}
.option-row.is-correct-answer .option-btn,
.option-row.is-ruled-out.is-correct-answer .option-btn {
  border-width: 2px;
  border-color: var(--ok);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--ok) 38%, transparent);
}
.option-row.is-ruled-out .option-ruleout-toggle {
  color: var(--accent);
}
.option-row.is-ruled-out .icon-eye {
  display: none;
}
.option-row.is-ruled-out .icon-eye-off {
  display: block;
}
.option-btn:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--border) 72%, white 28%);
  background: color-mix(in srgb, var(--panel-soft) 96%, white 4%);
}
.option-btn:active {
  transform: translateY(1px);
}
.option-btn.incorrect {
  background: rgba(255,123,139,0.2);
  border-color: var(--bad);
}
.option-btn.pending-answer {
  background: rgba(140, 198, 255, 0.18);
  border-color: rgba(140, 198, 255, 0.66);
  box-shadow: 0 0 0 1px rgba(140, 198, 255, 0.22);
}
.option-btn.highlighted-answer {
  background: rgba(126,247,201,0.24);
  border-color: var(--ok);
  box-shadow: 0 0 0 1px rgba(126,247,201,0.35), 0 0 22px rgba(126,247,201,0.28);
  font-weight: 600;
  padding: var(--card-option-pad-y) var(--card-option-pad-x);
  border-radius: 10px;
  align-self: stretch;
}
.trust-rail {
  display: flex;
  flex-wrap: wrap;
  gap: var(--study-trust-chip-gap, 8px);
  margin-top: 0;
  margin-bottom: var(--study-trust-chip-margin-bottom, 6px);
}
.study-page-root.embedded-page .trust-rail {
  margin-bottom: var(--study-trust-chip-margin-bottom, 10px);
}
.trust-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--study-trust-chip-padding, 4px 7px);
  border-radius: 999px;
  border: 1px solid rgba(243,201,105,0.28);
  background: linear-gradient(180deg, rgba(54, 29, 94, 0.84), rgba(34, 18, 63, 0.76));
  color: #f7cf73;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04), 0 8px 18px rgba(21, 10, 42, 0.22);
  font-size: var(--study-trust-chip-font-size, 0.74rem);
  line-height: 1.2;
}
.study-page-root.embedded-page .modal {
  position: absolute;
  inset: 0;
  align-items: flex-start;
  justify-content: center;
  padding:
    calc(var(--dashboard-mounted-modal-top-offset, 18px) + 18px)
    18px
    calc(var(--dashboard-mounted-modal-bottom-offset, 18px) + 18px);
  overflow: auto;
  z-index: 10000;
}
.study-page-root.embedded-page .modal-card {
  max-width: min(560px, calc(100% - 36px));
}
.study-page-root.embedded-page .social-share-modal-card,
.study-page-root.embedded-page .confidence-modal-card {
  max-width: min(760px, calc(100% - 36px));
}
:root[data-theme="light"] .study-page-root.embedded-page .trust-chip,
:root[data-theme="light"] .study-page-root.embedded-page .card-difficulty,
.study-page-root.embedded-page[data-theme="light"] .trust-chip,
.study-page-root.embedded-page[data-theme="light"] .card-difficulty {
  border-color: rgba(212, 170, 58, 0.34);
  background: linear-gradient(180deg, rgba(255, 246, 214, 0.96), rgba(250, 236, 187, 0.94));
  color: #835a11;
  box-shadow: 0 6px 14px rgba(140, 118, 49, 0.08);
  text-shadow: none;
}
:root[data-theme="light"] .study-page-root.embedded-page .trust-chip strong,
.study-page-root.embedded-page[data-theme="light"] .trust-chip strong {
  color: #7b5310;
}
.trust-chip strong {
  color: #ffd988;
  font-weight: 600;
}
.card-difficulty {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(243,201,105,0.28);
  border-radius: 999px;
  padding: var(--study-trust-chip-padding, 4px 7px);
  font-size: var(--study-trust-chip-font-size, 0.74rem);
  letter-spacing: 0.02em;
  color: #f7cf73;
  background: linear-gradient(180deg, rgba(54, 29, 94, 0.84), rgba(34, 18, 63, 0.76));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04), 0 8px 18px rgba(21, 10, 42, 0.22);
  position: absolute;
  top: 12px;
  right: 18px;
  z-index: 3;
}
.card-face-status-badges {
  position: absolute;
  top: 12px;
  right: calc(18px + var(--study-face-flag-offset, 74px));
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.card-face-flag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 143, 177, 0.42);
  border-radius: 999px;
  padding: var(--study-trust-chip-padding, 4px 8px);
  min-height: 0;
  font: inherit;
  font-size: var(--study-trust-chip-font-size, 0.74rem);
  line-height: 1;
  color: #ff9bb9;
  background: linear-gradient(180deg, rgba(95, 24, 70, 0.74), rgba(50, 18, 56, 0.72));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04), 0 8px 18px rgba(50, 10, 42, 0.2);
  cursor: pointer;
}
.card-face-flag:disabled {
  cursor: default;
  opacity: 0.7;
}
.card-face-flag.is-active {
  border-color: rgba(255, 143, 177, 0.62);
  color: #ffd5e2;
  background: linear-gradient(180deg, rgba(150, 40, 91, 0.82), rgba(88, 28, 78, 0.76));
}
.card-shell > .study-progress-stack,
.card-shell > .progress,
.card-shell > .card,
.card-shell > .session-tray,
.card-shell > .actions {
  width: var(--study-stage-inline-width, min(calc(100% - 24px), var(--study-stage-max)));
  margin-inline: auto;
}
.bar {
  flex: 1;
  background: rgba(255,255,255,0.06);
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
}
.fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #7ef7c9);
}
.card {
  background: transparent !important;
  border-radius: 0;
  border: none !important;
  background-image: none !important;
  box-shadow: none !important;
  height: auto;
  min-height: 0;
  perspective: 1200px;
  cursor: pointer;
  position: relative;
  padding: 0;
  overflow: visible;
  align-self: var(--study-card-align-self, stretch);
  isolation: isolate;
}
.card-inner {
  width: 100%;
  height: 100%;
  min-height: var(--study-card-inner-min-height, 0);
  position: relative;
  transition: transform var(--flip-duration, 320ms) ease;
  border-radius: 16px;
  z-index: 2;
  transform: scale(1);
  overflow: visible;
}
.card::before,
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 18px;
  background: var(--deck-stack-a);
  box-shadow: var(--study-card-layer-shadow, var(--deck-stack-shadow, var(--deck-shadow)));
  pointer-events: none;
  z-index: -2;
}
.card::before {
  inset: var(--study-card-layer-before-inset, 12px 9px 13px 9px);
  transform: var(--study-card-layer-before-transform, translate(-3px, 7px) rotate(-4deg));
  opacity: var(--study-card-layer-before-opacity, 0.26);
}
.card::after {
  background: var(--deck-stack-b);
  inset: var(--study-card-layer-after-inset, 11px 8px 12px 8px);
  transform: var(--study-card-layer-after-transform, translate(3px, 6px) rotate(3deg));
  opacity: var(--study-card-layer-after-opacity, 0.32);
  z-index: -1;
}
.card.flipped .card-inner {
  transform: scale(0.995);
}
.study-page-root.embedded-page .card .card-inner,
.study-page-root.embedded-page .card.flipped .card-inner {
  transform: none;
  transform-origin: top center;
}
.face {
  position: absolute;
  inset: var(--study-face-inset, 16px);
  background: var(--study-card-face-background, var(--deck-front));
  border-radius: 18px;
  padding: var(--study-face-padding, 26px 24px 24px);
  border: none;
  box-shadow: var(--deck-shadow);
  display: flex;
  flex-direction: column;
  gap: var(--study-face-gap, 14px);
  min-height: var(--study-face-min-height, 0);
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  touch-action: pan-y;
  transition: opacity var(--flip-duration, 320ms) ease, box-shadow 130ms ease;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.face::-webkit-scrollbar {
  width: 0;
  height: 0;
  background: transparent;
}
.face.front {
  z-index: 2;
  opacity: 1;
  pointer-events: auto;
  gap: var(--study-face-front-gap, 8px);
  padding: var(--study-face-front-padding, 24px 28px 20px);
}
.face.back {
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  text-align: center;
}
.face.back::after {
  content: "";
  position: absolute;
  top: 52px;
  left: 50%;
  font-size: 3.7rem;
  line-height: 1;
  font-family: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  opacity: 0;
  transform: translateX(-50%) scale(0.9);
  transition: opacity 180ms ease, transform 180ms ease, text-shadow 180ms ease, color 180ms ease;
  pointer-events: none;
  z-index: 6;
}
.study-page-root:not(.feedback-cues-disabled) .card.show-answer.answer-correct .face.back::after {
  content: "☺";
  color: #ffd54a;
  text-shadow: 0 0 14px rgba(255,213,74,0.75), 0 0 28px rgba(255,213,74,0.5), 0 0 42px rgba(255,213,74,0.28);
  opacity: 1;
  transform: translateX(-50%) scale(1);
}
.study-page-root:not(.feedback-cues-disabled) .card.show-answer.answer-incorrect .face.back::after {
  content: "☹";
  color: #ff6d7c;
  text-shadow: 0 0 12px rgba(255,109,124,0.72), 0 0 24px rgba(255,109,124,0.46), 0 0 36px rgba(255,109,124,0.26);
  opacity: 1;
  transform: translateX(-50%) scale(1);
}
.card.flipped .face.front {
  opacity: 0;
  pointer-events: none;
}
.card.flipped .face.back {
  opacity: 1;
  pointer-events: auto;
}
.card.show-answer .face.back {
  box-shadow: var(--deck-shadow);
}
.card.show-answer.answer-correct .face.back {
  box-shadow: 0 22px 44px rgba(8, 6, 20, 0.34), 0 0 20px rgba(126,247,201,0.18), 0 0 30px rgba(126,247,201,0.10);
}
.card.show-answer.answer-incorrect .face.back {
  box-shadow: 0 22px 44px rgba(8, 6, 20, 0.34), 0 0 20px rgba(255,143,177,0.18), 0 0 30px rgba(255,143,177,0.10);
}
.answer-wrap {
  flex: 1;
  display: grid;
  align-items: center;
  justify-items: center;
  width: 100%;
  padding: 24px 0;
}
.face.back .answer {
  width: min(100%, 840px);
  padding: 18px 22px;
  border-radius: 18px;
  border: 1px solid rgba(126,247,201,0.34);
  background: linear-gradient(180deg, rgba(34, 18, 63, 0.94), rgba(54, 28, 96, 0.92));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04), 0 18px 36px rgba(10, 6, 24, 0.22);
  color: var(--text);
  text-align: left;
}
.card.flipped .face.back {
  cursor: pointer;
  transition: box-shadow 180ms ease, transform 180ms ease;
}
.card.flipped .face.back:hover,
.card.flipped .face.back:active {
  box-shadow: 0 28px 52px rgba(4, 3, 16, 0.5), 0 0 24px rgba(167,120,255,0.18), 0 0 36px rgba(243,201,105,0.08);
  transform: translateY(-1px);
}
.card-meta-row {
  position: var(--study-card-meta-position, static);
  left: var(--study-card-meta-left, auto);
  right: var(--study-card-meta-right, auto);
  bottom: var(--study-card-meta-bottom, auto);
  z-index: var(--study-card-meta-z-index, auto);
  display: flex;
  align-items: var(--study-card-meta-align-items, stretch);
  gap: var(--study-card-meta-gap, 0);
  pointer-events: var(--study-card-meta-pointer-events, auto);
  margin-top: var(--study-card-meta-margin-top, auto);
  padding-top: var(--study-card-meta-padding-top, 18px);
  width: 100%;
  min-width: 0;
}
.study-page-root.embedded-page .session-tray {
  justify-content: center;
}
.study-page-root.embedded-page .session-tray-status {
  margin-left: 0;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .card-shell {
  grid-template-areas:
    "progress"
    "card"
    "tray"
    "actions";
  grid-template-rows: auto minmax(clamp(540px, 58dvh, 760px), 1fr) auto auto;
  align-content: stretch;
  overflow: visible;
  row-gap: clamp(12px, 1.4dvh, 18px);
  padding-bottom: clamp(12px, 1.4dvh, 18px);
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .study-progress-stack {
  grid-area: progress;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .card {
  grid-area: card;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .session-tray {
  grid-area: tray;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .actions {
  grid-area: actions;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active #card {
  height: 100%;
  min-height: clamp(540px, 58dvh, 760px);
  max-height: none;
  align-self: stretch;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active #card-inner {
  height: 100%;
  min-height: 100%;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .session-tray,
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .actions {
  margin-top: 0;
  position: relative;
  z-index: 2;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .session-tray {
  width: auto;
  max-width: min(100%, 760px);
  justify-self: center;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding-inline: 0;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .session-tray-status {
  margin-left: 0;
  min-width: 0;
  white-space: nowrap;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .session-tray-tools {
  margin-left: 0;
  justify-content: center;
  flex: 0 0 auto;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 10px 12px;
  align-items: stretch;
}
.study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .actions button {
  min-height: 42px;
  border-radius: 13px;
  font-size: 0.98rem;
  padding-block: 8px;
}
.study-page-root.assignment-page.assignment-runtime-active .prompt {
  font-weight: 800;
  letter-spacing: -0.02em;
}
.study-page-root.assignment-page.assignment-runtime-active #card-body :where(p, div, li, blockquote, span) {
  font-weight: inherit;
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-row {
  --card-option-size: var(--assignment-card-option-size, 1.28rem);
  --card-option-line: var(--assignment-card-option-line, 1.28);
  --card-option-pad-y: var(--assignment-card-option-pad-y, 12px);
  --card-option-pad-x: var(--assignment-card-option-pad-x, 18px);
  --study-option-toggle-size: var(--assignment-option-toggle-size, 40px);
  grid-template-columns: minmax(0, 1fr) var(--study-option-toggle-size, 44px);
  gap: var(--study-option-row-gap, 14px);
  align-items: stretch;
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-btn {
  display: grid;
  grid-template-columns: minmax(2.2ch, auto) minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  justify-content: flex-start;
  text-align: left;
  position: relative;
  font-size: max(1.28rem, var(--card-option-size));
  line-height: max(1.28, var(--card-option-line));
  min-height: max(
    var(--card-option-min-height, 0px),
    calc(2lh + var(--card-option-pad-y, 12px) + var(--card-option-pad-y, 12px))
  );
  padding: var(--card-option-pad-y) var(--card-option-pad-x);
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-letter {
  display: block;
  flex: none;
  line-height: 1.1;
  white-space: nowrap;
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-copy {
  display: block;
  min-width: 0;
  overflow-wrap: anywhere;
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-copy :where(p, div, li) {
  display: inline;
  margin: 0;
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-copy :where(br) {
  display: inline;
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-row.is-selected .assignment-option-btn {
  background: rgba(111, 170, 255, 0.18);
  border-color: rgba(111, 170, 255, 0.9);
  box-shadow: 0 0 0 2px rgba(111, 170, 255, 0.16);
  filter: saturate(0.78);
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-row.is-ruled-out .assignment-option-btn > strong,
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-row.is-ruled-out .assignment-option-btn > span {
  opacity: 0.42;
  filter: blur(1px) saturate(0.6);
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-row.is-selected.is-ruled-out .assignment-option-btn {
  border-color: rgba(111, 170, 255, 0.98);
  box-shadow: 0 0 0 2px rgba(111, 170, 255, 0.18);
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-hide {
  width: var(--study-option-toggle-size, 44px);
  min-width: var(--study-option-toggle-size, 44px);
  min-height: var(--study-option-toggle-size, 44px);
  border: 0 !important;
  border-color: transparent !important;
  background: transparent !important;
  background-color: transparent !important;
  background-image: none !important;
  color: inherit;
  box-shadow: none !important;
  appearance: none;
}
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-hide:hover,
.study-page-root.assignment-page.assignment-runtime-active .assignment-option-hide:focus-visible {
  border-color: transparent !important;
  background: transparent !important;
  background-color: transparent !important;
  background-image: none !important;
  box-shadow: none !important;
}
@media (max-width: 900px) {
  .study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .session-tray {
    width: min(100%, var(--study-stage-inline-width));
    justify-content: flex-start;
  }
}
@media (max-width: 680px) {
  .study-page-root.assignment-page.assignment-runtime-active.assignment-has-active .actions {
    grid-template-columns: minmax(0, 1fr);
  }
}
.card-breadcrumbs {
  display: block;
  color: var(--muted);
  font-size: var(--study-card-breadcrumbs-font-size, 0.82rem);
  line-height: var(--study-card-breadcrumbs-line-height, 1.3);
  letter-spacing: 0.01em;
  word-break: break-word;
  flex: var(--study-card-breadcrumbs-flex, initial);
  min-width: var(--study-card-breadcrumbs-min-width, auto);
  pointer-events: var(--study-card-breadcrumbs-pointer-events, auto);
}
.card-breadcrumbs em {
  font-style: italic;
}
.card-tool-buttons {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  pointer-events: auto;
}
.card-citation-info {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(122, 108, 226, 0.42);
  border: 1px solid color-mix(in srgb, var(--border) 84%, rgba(255, 255, 255, 0.22));
  background: rgba(237, 242, 255, 0.92);
  background: color-mix(in srgb, var(--panel-soft) 84%, rgba(255, 255, 255, 0.05));
  color: #6f5be8;
  color: color-mix(in srgb, var(--accent) 78%, var(--text) 22%);
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 26%, transparent), 0 0 0 1px color-mix(in srgb, var(--accent) 20%, transparent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  pointer-events: auto;
}
.card-citation-info i,
.card-citation-info svg {
  width: 18px;
  height: 18px;
  display: block;
  font-size: 17px;
  line-height: 1;
  color: currentColor;
}
.card-citation-info svg {
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.card-citation-info:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 36%, var(--border));
  background: color-mix(in srgb, var(--panel-soft) 92%, rgba(255, 255, 255, 0.08));
  box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 30%, transparent), 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent);
}
.card-citation-info:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}
.card-citation-info.is-speaking {
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
  background: color-mix(in srgb, var(--accent) 18%, var(--panel-soft));
  color: var(--accent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 35%, transparent), 0 12px 28px color-mix(in srgb, var(--accent) 20%, transparent);
}
.card-citation-info.is-starred {
  border-color: color-mix(in srgb, var(--accent) 76%, var(--border));
  background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 24%, var(--panel-soft)), color-mix(in srgb, var(--accent) 16%, var(--panel-soft)));
  color: var(--accent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 40%, transparent), 0 0 18px color-mix(in srgb, var(--accent) 28%, transparent), 0 12px 26px color-mix(in srgb, var(--accent) 18%, transparent);
}
.card-citation-info.is-starred i,
.card-citation-info.is-starred svg {
  filter: drop-shadow(0 0 8px color-mix(in srgb, var(--accent) 54%, transparent));
}
:root[data-theme="light"] .study-page-root .card-citation-info,
.study-page-root[data-theme="light"] .card-citation-info {
  border-color: rgba(128, 114, 228, 0.44);
  background: linear-gradient(140deg, rgba(248, 251, 255, 0.98), rgba(235, 241, 255, 0.96));
  color: #6956e8;
  box-shadow: 0 10px 20px rgba(96, 107, 183, 0.16), 0 0 0 1px rgba(128, 114, 228, 0.2);
}
:root[data-theme="light"] .study-page-root .card-citation-info i,
:root[data-theme="light"] .study-page-root .card-citation-info svg,
.study-page-root[data-theme="light"] .card-citation-info i,
.study-page-root[data-theme="light"] .card-citation-info svg {
  color: #6956e8;
  filter: drop-shadow(0 0 6px rgba(105, 86, 232, 0.25));
}
:root[data-theme="light"] .study-page-root .card-citation-info:hover,
.study-page-root[data-theme="light"] .card-citation-info:hover {
  border-color: rgba(120, 102, 232, 0.62);
  background: linear-gradient(140deg, rgba(252, 254, 255, 1), rgba(238, 244, 255, 0.98));
  box-shadow: 0 12px 24px rgba(96, 107, 183, 0.2), 0 0 0 1px rgba(120, 102, 232, 0.3);
}
:root[data-theme="light"] .study-page-root .card-citation-info.is-starred,
.study-page-root[data-theme="light"] .card-citation-info.is-starred {
  border-color: rgba(223, 166, 49, 0.68);
  background: linear-gradient(145deg, rgba(255, 247, 222, 0.98), rgba(255, 233, 179, 0.96));
  color: #8f5b00;
  box-shadow: 0 0 0 1px rgba(223, 166, 49, 0.38), 0 0 16px rgba(223, 166, 49, 0.28), 0 10px 22px rgba(184, 133, 20, 0.2);
}
:root[data-theme="light"] .study-page-root .card-citation-info.is-starred i,
:root[data-theme="light"] .study-page-root .card-citation-info.is-starred svg,
.study-page-root[data-theme="light"] .card-citation-info.is-starred i,
.study-page-root[data-theme="light"] .card-citation-info.is-starred svg {
  color: #8f5b00;
  filter: drop-shadow(0 0 7px rgba(223, 166, 49, 0.45));
}
.session-tray {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: var(--study-session-tray-justify, flex-start);
  gap: 8px;
  margin-top: 0;
  padding-inline: 10px;
}
.session-tray-button,
.session-tray-status {
  min-height: 38px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(20, 16, 36, 0.72);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 12px;
  font-size: 0.9rem;
  line-height: 1;
  box-shadow: none;
}
.session-tray-button {
  cursor: pointer;
}
.session-tray-button i,
.session-tray-button svg {
  width: 14px;
  height: 14px;
  display: block;
  font-size: 14px;
  line-height: 1;
  color: currentColor;
  flex-shrink: 0;
}
.session-tray-button svg {
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.session-tray-button strong {
  font-size: 0.88rem;
  font-weight: 700;
  color: inherit;
}
.session-tray-button:hover {
  transform: translateY(-1px);
  border-color: rgba(255,255,255,0.24);
  background: rgba(28, 22, 48, 0.9);
}
.session-tray-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}
.session-tray-button.is-active {
  border-color: rgba(243,201,105,0.34);
  background: rgba(243,201,105,0.12);
  color: var(--accent);
}
.session-tray-button.easy {
  border-color: rgba(126,247,201,0.28);
  background: rgba(126,247,201,0.12);
  color: var(--ok);
}
.session-tray-button.warn {
  border-color: rgba(255,143,177,0.28);
  background: rgba(255,143,177,0.12);
  color: var(--bad);
}
.session-tray-button.icon-only {
  width: 38px;
  min-width: 38px;
  padding: 8px;
  gap: 0;
}
.session-tray-status {
  margin-left: var(--study-session-tray-status-margin-left, auto);
  color: var(--muted);
  max-width: 100%;
  justify-content: var(--study-session-tray-status-justify, flex-end);
}
.session-tray-tools {
  margin-left: 0;
  justify-content: var(--study-session-tray-tools-justify, flex-start);
  gap: 8px;
}
:root[data-theme="light"] .study-page-root .session-tray-button,
:root[data-theme="light"] .study-page-root .session-tray-status,
:root[data-theme="light"] .study-page-root .revisit-modal-card,
:root[data-theme="light"] .study-page-root .revisit-modal-item,
.study-page-root[data-theme="light"] .session-tray-button,
.study-page-root[data-theme="light"] .session-tray-status,
.study-page-root[data-theme="light"] .revisit-modal-card,
.study-page-root[data-theme="light"] .revisit-modal-item {
  background: rgba(255,255,255,0.92);
  color: #2a1548;
  border-color: rgba(92, 68, 142, 0.18);
  box-shadow: 0 10px 24px rgba(59, 41, 99, 0.08);
}
:root[data-theme="light"] .study-page-root .option-btn,
.study-page-root[data-theme="light"] .option-btn {
  background: color-mix(in srgb, var(--panel) 94%, white 6%);
  color: #173a4a;
  border-color: rgba(70, 140, 168, 0.36);
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,0.38),
    0 0 0 1px rgba(70, 140, 168, 0.1);
}
:root[data-theme="light"] .study-page-root .option-btn:hover,
.study-page-root[data-theme="light"] .option-btn:hover {
  border-color: rgba(58, 127, 153, 0.5);
  background: rgba(255,255,255,0.94);
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,0.44),
    0 0 0 1px rgba(58, 127, 153, 0.14);
}
:root[data-theme="light"] .study-page-root.assignment-page.assignment-runtime-active .assignment-option-row.is-selected .assignment-option-btn,
.study-page-root.assignment-page.assignment-runtime-active[data-theme="light"] .assignment-option-row.is-selected .assignment-option-btn {
  border-color: #2f6df6;
  background: rgba(224, 236, 255, 0.94);
  box-shadow: 0 0 0 3px rgba(47, 109, 246, 0.22);
}
:root[data-theme="light"] .study-page-root.assignment-page.assignment-runtime-active .assignment-option-row.is-selected.is-ruled-out .assignment-option-btn,
.study-page-root.assignment-page.assignment-runtime-active[data-theme="light"] .assignment-option-row.is-selected.is-ruled-out .assignment-option-btn {
  border-color: #2f6df6;
  box-shadow: 0 0 0 2px rgba(47, 109, 246, 0.2);
}
:root[data-theme="light"] .study-page-root .highlighted-answer,
:root[data-theme="light"] .study-page-root .option-btn.highlighted-answer,
.study-page-root[data-theme="light"] .highlighted-answer,
.study-page-root[data-theme="light"] .option-btn.highlighted-answer {
  background: linear-gradient(180deg, rgba(214, 252, 236, 0.94), rgba(190, 244, 221, 0.9));
  border-color: rgba(36, 156, 118, 0.6);
  color: #104739;
  box-shadow: 0 0 0 1px rgba(36, 156, 118, 0.18), 0 12px 24px rgba(36, 156, 118, 0.12);
}
:root[data-theme="light"] .study-page-root .option-btn.incorrect,
.study-page-root[data-theme="light"] .option-btn.incorrect {
  background: linear-gradient(180deg, rgba(255, 229, 234, 0.95), rgba(255, 208, 218, 0.92));
  border-color: rgba(219, 84, 118, 0.56);
  color: #6f1732;
  box-shadow: 0 0 0 1px rgba(219, 84, 118, 0.16), 0 10px 22px rgba(219, 84, 118, 0.1);
}
:root[data-theme="light"] .study-page-root .option-btn.pending-answer,
.study-page-root[data-theme="light"] .option-btn.pending-answer {
  background: linear-gradient(180deg, rgba(229, 242, 255, 0.96), rgba(211, 232, 255, 0.92));
  border-color: rgba(58, 127, 153, 0.42);
  color: #173752;
  box-shadow: 0 0 0 1px rgba(58, 127, 153, 0.14), 0 10px 22px rgba(58, 127, 153, 0.08);
}
:root[data-theme="light"] .study-page-root .option-ruleout-toggle,
.study-page-root[data-theme="light"] .option-ruleout-toggle {
  color: #6b5b89;
}
:root[data-theme="light"] .study-page-root .option-ruleout-toggle:hover,
.study-page-root[data-theme="light"] .option-ruleout-toggle:hover {
  color: #2a1548;
}
:root[data-theme="light"] .study-page-root .option-row.is-ruled-out .option-btn,
.study-page-root[data-theme="light"] .option-row.is-ruled-out .option-btn {
  background: rgba(208, 201, 222, 0.42);
  border-color: rgba(92, 68, 142, 0.14);
  color: rgba(42, 21, 72, 0.68);
}
:root[data-theme="light"] .study-page-root .option-row.is-correct-answer .option-btn,
:root[data-theme="light"] .study-page-root .option-row.is-ruled-out.is-correct-answer .option-btn,
.study-page-root[data-theme="light"] .option-row.is-correct-answer .option-btn,
.study-page-root[data-theme="light"] .option-row.is-ruled-out.is-correct-answer .option-btn {
  border-color: #087b62;
  box-shadow: 0 0 0 3px rgba(8, 123, 98, 0.28);
}
:root[data-theme="light"] .study-page-root .option-row.is-ruled-out .option-ruleout-toggle,
.study-page-root[data-theme="light"] .option-row.is-ruled-out .option-ruleout-toggle {
  color: #8e6a17;
}
:root[data-theme="light"] .study-page-root .trust-chip,
:root[data-theme="light"] .study-page-root .card-difficulty,
.study-page-root[data-theme="light"] .trust-chip,
.study-page-root[data-theme="light"] .card-difficulty {
  border-color: rgba(212, 178, 92, 0.34);
  background: linear-gradient(180deg, rgba(255, 247, 223, 0.96), rgba(248, 235, 194, 0.92));
  color: #7a5710;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.18), 0 8px 18px rgba(121, 90, 28, 0.10);
  text-shadow: none;
}
:root[data-theme="light"] .study-page-root .trust-chip strong,
:root[data-theme="light"] .study-page-root .card-difficulty strong,
.study-page-root[data-theme="light"] .trust-chip strong,
.study-page-root[data-theme="light"] .card-difficulty strong {
  color: #7a5710;
}
:root[data-theme="light"] .study-page-root .card-face-flag,
.study-page-root[data-theme="light"] .card-face-flag {
  border-color: rgba(209, 80, 122, 0.28);
  background: linear-gradient(180deg, rgba(255, 240, 246, 0.96), rgba(255, 225, 237, 0.92));
  color: #a12d60;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.18), 0 8px 18px rgba(152, 42, 92, 0.10);
  text-shadow: none;
}
:root[data-theme="light"] .study-page-root .card-face-flag.is-active,
.study-page-root[data-theme="light"] .card-face-flag.is-active {
  border-color: rgba(209, 80, 122, 0.42);
  background: linear-gradient(180deg, rgba(255, 225, 237, 0.98), rgba(255, 204, 224, 0.94));
  color: #8d244f;
}
:root[data-theme="light"] .study-page-root .session-tray-button:hover,
:root[data-theme="light"] .study-page-root .revisit-modal-item:hover,
.study-page-root[data-theme="light"] .session-tray-button:hover,
.study-page-root[data-theme="light"] .revisit-modal-item:hover {
  background: rgba(255,255,255,0.98);
  border-color: rgba(92, 68, 142, 0.28);
}
:root[data-theme="light"] .study-page-root .session-tray-button.is-active,
.study-page-root[data-theme="light"] .session-tray-button.is-active {
  background: rgba(245, 233, 186, 0.92);
  border-color: rgba(212, 178, 92, 0.38);
  color: #7a5710;
}
:root[data-theme="light"] .study-page-root .session-tray-button.warn,
.study-page-root[data-theme="light"] .session-tray-button.warn {
  background: rgba(255, 236, 242, 0.96);
  border-color: rgba(218, 118, 147, 0.28);
  color: #a54567;
}
:root[data-theme="light"] .study-page-root .session-tray-button.easy,
.study-page-root[data-theme="light"] .session-tray-button.easy {
  background: rgba(228, 250, 240, 0.96);
  border-color: rgba(73, 163, 124, 0.3);
  color: #1b7359;
}
:root[data-theme="light"] .study-page-root .session-tray-status,
:root[data-theme="light"] .study-page-root .revisit-modal-item-meta,
:root[data-theme="light"] .study-page-root .revisit-modal-empty,
.study-page-root[data-theme="light"] .session-tray-status,
.study-page-root[data-theme="light"] .revisit-modal-item-meta,
.study-page-root[data-theme="light"] .revisit-modal-empty {
  color: #4f7284;
}