.astro-main {
  padding-top: 1.2rem;
}

.astro-hero {
  border-radius: 18px;
  border: 1px solid var(--border-color);
  background:
    radial-gradient(circle at 84% 16%, rgba(110, 210, 255, 0.18), transparent 34%),
    linear-gradient(145deg, #0d2146, #173f74 55%, #245b8e 100%);
  color: #fff;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.astro-hero h1 {
  margin: 0 0 0.4rem;
  color: #fff;
  font-size: clamp(1.65rem, 4.2vw, 2.45rem);
}

.astro-hero p {
  margin: 0;
  line-height: 1.65;
  max-width: 85ch;
  color: rgba(255, 255, 255, 0.93);
}

.astro-pill-row {
  margin-top: 0.82rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
}

.astro-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  padding: 0.22rem 0.6rem;
  font-size: 0.82rem;
  background: rgba(255, 255, 255, 0.11);
  color: #fff;
}

.astro-gate,
.astro-panel {
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: var(--card-bg);
  padding: 1rem;
}

.astro-gate h2 {
  margin: 0 0 0.35rem;
}

.astro-gate p {
  margin: 0 0 0.75rem;
  line-height: 1.55;
}

.astro-gate-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  max-width: 560px;
}

.astro-gate-form input,
.quiz-setup input,
.quiz-setup select,
.location-checker input {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  padding: 0.56rem 0.7rem;
  font: inherit;
}

.astro-btn,
.quiz-option,
.astro-tab,
.astro-folder,
.memory-cell,
.reaction-target {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  font: inherit;
}

.astro-btn,
.astro-tab,
.quiz-option,
.astro-folder {
  cursor: pointer;
}

.astro-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.47rem 0.75rem;
}

.astro-btn.primary {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #fff;
}

.astro-btn.primary:hover,
.astro-btn.primary:focus-visible {
  filter: brightness(1.03);
}

.astro-btn:hover,
.astro-tab:hover,
.astro-folder:hover {
  border-color: var(--accent-color);
}

.astro-btn:disabled,
.quiz-option:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.astro-btn.danger {
  border-color: #d95a5a;
  color: #b13838;
}

[data-theme="dark"] .astro-btn.danger {
  color: #f3a2a2;
  border-color: #9c3e3e;
}

.astro-status {
  margin-top: 0.45rem;
  min-height: 1.1rem;
  font-size: 0.9rem;
}

.astro-status.error {
  color: #c33434;
}

.astro-status.success {
  color: #2b8b4f;
}

.astro-topbar {
  margin-top: 1rem;
  margin-bottom: 0.9rem;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

.astro-auth-controls {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.62rem 0.72rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.42rem;
  background: rgba(47, 140, 255, 0.06);
}

.astro-auth-user {
  font-size: 0.88rem;
  color: var(--muted-text);
  overflow-wrap: anywhere;
}

.astro-metric {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--card-bg);
  padding: 0.55rem 0.65rem;
}

.astro-metric-label {
  display: block;
  font-size: 0.78rem;
  opacity: 0.78;
}

.astro-metric-value {
  display: block;
  margin-top: 0.15rem;
  font-weight: 650;
  font-size: 1.04rem;
}

.astro-tabs {
  display: flex;
  gap: 0.48rem;
  overflow-x: auto;
  margin-bottom: 0.85rem;
  padding-bottom: 0.2rem;
}

.astro-tab {
  flex: 0 0 auto;
  padding: 0.44rem 0.76rem;
  white-space: nowrap;
}

.astro-tab[aria-selected="true"] {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

.astro-panel {
  margin-bottom: 0.95rem;
}

.astro-panel[hidden] {
  display: none;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.7rem;
  margin-bottom: 0.7rem;
  flex-wrap: wrap;
}

.panel-head h2,
.panel-head h3 {
  margin: 0;
}

.panel-head p {
  margin: 0;
  opacity: 0.82;
  font-size: 0.92rem;
}

.astro-folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(165px, 1fr));
  gap: 0.55rem;
  margin-bottom: 0.9rem;
}

.astro-folder {
  text-align: left;
  padding: 0.55rem 0.64rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.astro-folder:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
}

.astro-folder.active {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(0, 112, 243, 0.15);
}

.astro-folder-name {
  display: block;
  font-weight: 620;
  margin-bottom: 0.15rem;
}

.astro-folder-meta {
  display: block;
  font-size: 0.81rem;
  opacity: 0.78;
}

.flash-layout {
  display: grid;
  gap: 0.7rem;
  grid-template-columns: 1fr;
}

.flash-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.6rem;
}

.flash-controls label {
  display: grid;
  gap: 0.3rem;
  font-size: 0.89rem;
}

.flash-controls select {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  padding: 0.45rem 0.6rem;
  font: inherit;
}

.flash-card-wrap {
  perspective: 1100px;
}

.flash-card {
  width: 100%;
  min-height: 250px;
  position: relative;
  border-radius: 14px;
  border: 1px solid var(--border-color);
  background: linear-gradient(140deg, rgba(24, 64, 119, 0.12), rgba(9, 30, 66, 0.03));
  transform-style: preserve-3d;
  transition: transform 0.45s ease;
  cursor: pointer;
}

.flash-card.is-flipped {
  transform: rotateY(180deg);
}

.flash-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 14px;
  padding: 0.95rem;
  display: grid;
  align-content: center;
  gap: 0.48rem;
}

.flash-face h3 {
  margin: 0;
  font-size: 0.92rem;
  opacity: 0.78;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.flash-face p {
  margin: 0;
  line-height: 1.57;
  font-size: 1.05rem;
}

.flash-image-wrap {
  margin: 0.35rem 0 0;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  background: rgba(44, 78, 122, 0.08);
}

.flash-image-wrap img {
  display: block;
  width: 100%;
  max-height: 130px;
  object-fit: contain;
  background: rgba(14, 28, 49, 0.08);
}

.flash-face.back {
  transform: rotateY(180deg);
  background: linear-gradient(145deg, rgba(0, 112, 243, 0.09), rgba(20, 124, 96, 0.07));
}

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

.flash-meta {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.84;
}

.quiz-setup {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.quiz-setup label {
  display: grid;
  gap: 0.28rem;
  font-size: 0.9rem;
}

#quiz-instant {
  width: auto;
  margin: 0;
  transform: translateY(1px);
}

.quiz-question {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-color);
  padding: 0.85rem;
}

.quiz-question h3 {
  margin: 0 0 0.48rem;
  font-size: 1.05rem;
}

.quiz-question p {
  margin: 0;
  line-height: 1.62;
  font-size: 1.02rem;
}

.quiz-image-wrap {
  margin: 0.62rem 0 0;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  max-width: 380px;
  background: rgba(44, 78, 122, 0.08);
}

.quiz-image-wrap img {
  display: block;
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  background: rgba(14, 28, 49, 0.08);
}

.quiz-options {
  margin-top: 0.7rem;
  display: grid;
  gap: 0.55rem;
}

.quiz-option {
  text-align: left;
  padding: 0.58rem 0.7rem;
  line-height: 1.45;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.quiz-option:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 14px rgba(0, 0, 0, 0.08);
}

.quiz-option.selected {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(0, 112, 243, 0.17);
}

.quiz-option.correct {
  border-color: #28945c;
  background: rgba(40, 148, 92, 0.12);
}

.quiz-option.wrong {
  border-color: #c84646;
  background: rgba(200, 70, 70, 0.12);
}

.quiz-footer {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  justify-content: space-between;
}

.quiz-progress {
  font-size: 0.92rem;
  opacity: 0.82;
}

.quiz-result {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-color);
  padding: 0.9rem;
  margin-top: 0.75rem;
}

.quiz-result h3 {
  margin: 0 0 0.3rem;
}

.quiz-result p {
  margin: 0 0 0.45rem;
}

.quiz-recommendation {
  margin-top: 0.15rem;
}

.quiz-review {
  margin: 0.65rem 0 0;
  padding-left: 1.05rem;
  display: grid;
  gap: 0.3rem;
}

.cognitive-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.cog-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-color);
  padding: 0.85rem;
}

.cog-card h3 {
  margin: 0 0 0.28rem;
}

.cog-card p {
  margin: 0 0 0.55rem;
  opacity: 0.86;
  line-height: 1.5;
}

.cog-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.cog-meta {
  margin: 0.2rem 0 0.45rem;
  font-size: 0.86rem;
  opacity: 0.84;
}

.rms-speed-controls {
  margin-bottom: 0.4rem;
}

.rms-speed-label {
  display: grid;
  gap: 0.22rem;
  font-size: 0.84rem;
  min-width: 145px;
}

.rms-speed-select {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-color);
  padding: 0.34rem 0.42rem;
  font: inherit;
}

.cog-sequence {
  font-size: 1.38rem;
  letter-spacing: 0.22em;
  font-weight: 700;
  min-height: 1.8rem;
  margin: 0.3rem 0;
}

.digit-feedback {
  min-height: 2.2rem;
  margin: 0.2rem 0 0.45rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  letter-spacing: 0.08em;
}

.digit-line {
  display: block;
  line-height: 1.35;
  font-size: 0.92rem;
}

.digit-char {
  display: inline-block;
  min-width: 0.65ch;
}

.digit-char.ok {
  color: #2ea76f;
  animation: digit-ok-pulse 0.9s ease;
}

.digit-char.bad {
  color: #d24d4d;
  animation: digit-bad-pulse 0.9s ease;
}

.digit-correct-label {
  color: #8ab7ff;
  letter-spacing: normal;
  font-size: 0.84rem;
}

@keyframes digit-ok-pulse {
  0% { transform: scale(1); opacity: 0.8; }
  40% { transform: scale(1.18); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes digit-bad-pulse {
  0% { transform: scale(1); opacity: 0.8; }
  35% { transform: scale(1.18); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.cog-input {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-color);
  padding: 0.5rem 0.65rem;
  font: inherit;
  max-width: 220px;
}

.memory-grid {
  margin: 0.45rem 0 0.65rem;
  display: grid;
  grid-template-columns: repeat(var(--memory-cols, 4), minmax(32px, 1fr));
  gap: 0.35rem;
  max-width: 340px;
}

.memory-cell {
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.memory-cell.active {
  background: rgba(0, 112, 243, 0.2);
  border-color: var(--accent-color);
}

.memory-cell.user-picked {
  background: rgba(34, 163, 111, 0.22);
  border-color: #239367;
}

.conc-rule-grid {
  display: grid;
  gap: 0.4rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0.45rem 0;
}

.conc-rule-box {
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-color);
  padding: 0.45rem 0.55rem;
}

.conc-rule-box .label {
  display: block;
  font-size: 0.76rem;
  opacity: 0.76;
}

.conc-rule-box strong {
  display: block;
  margin-top: 0.12rem;
  font-size: 0.92rem;
}

.conc-reveal-btn {
  margin-top: 0.35rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text-color);
  font: inherit;
  font-size: 0.8rem;
  padding: 0.22rem 0.5rem;
  cursor: pointer;
}

.conc-reveal-btn:hover {
  border-color: var(--accent-color);
}

.conc-arena {
  margin: 0.3rem 0 0.45rem;
  display: grid;
  grid-template-columns: 1fr 170px 1fr;
  grid-template-rows: auto minmax(180px, auto) auto;
  gap: 0.42rem;
  align-items: center;
}

.conc-action {
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--card-bg);
  color: var(--text-color);
  min-height: 46px;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.conc-action:hover {
  transform: translateY(-1px);
}

.conc-action.top {
  grid-column: 2;
  grid-row: 1;
}

.conc-triangle-wrap {
  grid-column: 2;
  grid-row: 2;
  min-height: 180px;
  border: 1px dashed var(--border-color);
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(70, 115, 177, 0.06);
  padding: 0.4rem;
}

.conc-action.bottom {
  grid-column: 2;
  grid-row: 3;
}

.conc-action.side {
  grid-column: 3;
  grid-row: 2;
  min-height: 180px;
}

.conc-triangle {
  width: 142px;
  height: 142px;
  display: grid;
  place-items: center;
}

.conc-triangle svg {
  width: 100%;
  height: 100%;
}

.reaction-zone {
  margin-top: 0.55rem;
  max-width: 320px;
}

.reaction-mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.38rem;
  margin-top: 0.35rem;
}

.reaction-mode-tab {
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  border-radius: 999px;
  padding: 0.3rem 0.58rem;
  font-size: 0.78rem;
  cursor: pointer;
  transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.reaction-mode-tab:hover {
  transform: translateY(-1px);
}

.reaction-mode-tab.active {
  border-color: rgba(47, 140, 255, 0.9);
  background: rgba(47, 140, 255, 0.18);
}

.reaction-target {
  width: 100%;
  padding: 1.45rem 0.8rem;
  text-align: center;
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.reaction-target.waiting {
  background: rgba(227, 188, 60, 0.18);
  border-color: #d9a434;
}

.reaction-target.ready {
  background: rgba(38, 162, 102, 0.2);
  border-color: #2a9a62;
}

.reaction-target.too-soon {
  background: rgba(208, 66, 66, 0.2);
  border-color: #be4a4a;
}

.reaction-target.nogo {
  background: rgba(199, 55, 55, 0.2);
  border-color: #bf4444;
}

.reaction-target.stroop-match {
  border-width: 2px;
}

.speed-switcher {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.36rem;
}

.speed-mode-tab {
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  border-radius: 999px;
  padding: 0.3rem 0.62rem;
  font-size: 0.79rem;
  cursor: pointer;
  transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.speed-mode-tab:hover {
  transform: translateY(-1px);
}

.speed-mode-tab.active {
  border-color: rgba(47, 140, 255, 0.9);
  background: rgba(47, 140, 255, 0.18);
}

.speed-grid {
  margin: 0.45rem 0 0.65rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(72px, 1fr));
  gap: 0.35rem;
}

.speed-option {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-color);
  cursor: pointer;
  padding: 0.44rem 0.42rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.86rem;
  min-height: 44px;
  line-height: 1.25;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.speed-option:hover {
  transform: translateY(-1px);
}

.speed-option.selected {
  border-color: var(--accent-color);
  background: rgba(0, 112, 243, 0.15);
}

.speed-option.correct {
  border-color: #2d9f67;
  background: rgba(45, 159, 103, 0.18);
}

.speed-option.wrong {
  border-color: #c45151;
  background: rgba(196, 81, 81, 0.18);
}

.speed2-grid {
  margin: 0.45rem 0 0.6rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(78px, 1fr));
  gap: 0.35rem;
  max-width: 330px;
}

.speed2-cell {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-color);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.speed2-cell svg {
  width: 100%;
  height: 100%;
}

.speed2-cell.masked {
  background: linear-gradient(145deg, rgba(70, 115, 177, 0.1), rgba(70, 115, 177, 0.03));
}

.speed2-cell.masked::before {
  content: "";
  width: 44%;
  height: 44%;
  border-radius: 50%;
  border: 2px dashed rgba(120, 140, 170, 0.6);
}

.rot-prompt,
.math-question {
  margin: 0.45rem 0 0.65rem;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: rgba(70, 115, 177, 0.08);
  padding: 0.58rem 0.62rem;
  line-height: 1.5;
  white-space: pre-line;
}

.rot-options,
.math-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
  margin-bottom: 0.55rem;
}

.rot-option,
.math-option {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-color);
  cursor: pointer;
  padding: 0.45rem 0.5rem;
  text-align: left;
  min-height: 44px;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.rot-option:hover,
.math-option:hover {
  transform: translateY(-1px);
}

.rot-option.correct,
.math-option.correct {
  border-color: #2d9f67;
  background: rgba(45, 159, 103, 0.18);
}

.rot-option.wrong,
.math-option.wrong {
  border-color: #c45151;
  background: rgba(196, 81, 81, 0.18);
}

.speed-option:disabled,
.rot-option:disabled,
.math-option:disabled {
  cursor: default;
  transform: none;
  opacity: 0.9;
}

.progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.progress-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.8rem;
  align-items: center;
  margin-bottom: 0.55rem;
}

.progress-controls label {
  display: grid;
  gap: 0.2rem;
  font-size: 0.82rem;
  opacity: 0.9;
}

.progress-controls select {
  min-width: 140px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.3rem 0.45rem;
  background: var(--bg-color);
  color: var(--text-color);
}

.progress-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.58rem 0.65rem;
  background: var(--bg-color);
}

.progress-label {
  display: block;
  font-size: 0.8rem;
  opacity: 0.8;
}

.progress-value {
  display: block;
  margin-top: 0.16rem;
  font-size: 1.04rem;
  font-weight: 630;
}

.progress-chart-wrap {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-color);
  padding: 0.55rem;
}

#progress-chart {
  width: 100%;
  min-height: 220px;
  display: block;
  border-radius: 8px;
}

.badge-row {
  margin: 0.7rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mastery-section {
  margin-top: 0.7rem;
}

.mastery-section h3 {
  margin: 0 0 0.45rem;
}

.topic-mastery-list {
  display: grid;
  gap: 0.48rem;
}

.topic-mastery-item {
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-color);
  padding: 0.48rem 0.56rem 0.52rem;
}

.topic-mastery-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.3rem 0.5rem;
  align-items: baseline;
}

.topic-mastery-title {
  font-size: 0.92rem;
  font-weight: 620;
}

.topic-mastery-metrics {
  font-size: 0.8rem;
  opacity: 0.82;
}

.topic-mastery-bar {
  width: 100%;
  margin-top: 0.32rem;
  height: 8px;
  border-radius: 999px;
  background: rgba(130, 150, 180, 0.24);
  overflow: hidden;
}

.topic-mastery-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #2f8cff, #7f6dff);
}

.topic-mastery-meta {
  margin-top: 0.28rem;
  font-size: 0.78rem;
  opacity: 0.82;
}

.topic-mastery-empty {
  font-size: 0.84rem;
  opacity: 0.75;
}

.leaderboard-section {
  margin-top: 0.72rem;
}

.leaderboard-section h3 {
  margin: 0 0 0.36rem;
}

.leaderboard-controls {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.64rem;
  background: var(--bg-color);
  display: grid;
  gap: 0.46rem;
}

.leaderboard-controls label {
  display: grid;
  gap: 0.18rem;
  font-size: 0.83rem;
}

.leaderboard-controls input[type="text"] {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-color);
  padding: 0.52rem 0.68rem;
  font: inherit;
}

.leaderboard-optin {
  display: flex;
  align-items: center;
  gap: 0.46rem;
  font-size: 0.87rem;
}

.leaderboard-list {
  margin: 0.52rem 0 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.32rem;
  font-size: 0.9rem;
}

.leaderboard-item {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.6rem;
  align-items: baseline;
}

.leaderboard-rank {
  font-weight: 700;
  min-width: 2rem;
}

.leaderboard-name {
  font-weight: 600;
}

.leaderboard-meta {
  color: var(--muted-text);
  font-size: 0.84rem;
}

.badge-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  padding: 0.26rem 0.54rem;
  font-size: 0.82rem;
}

.history-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-color);
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.history-table th,
.history-table td {
  border-bottom: 1px solid var(--border-color);
  padding: 0.45rem 0.52rem;
  text-align: left;
  white-space: nowrap;
}

.history-table tr:last-child td {
  border-bottom: none;
}

.sources-list {
  margin: 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.32rem;
}

.sources-list a {
  word-break: break-word;
}

.panel-note {
  margin-top: 0.65rem;
  font-size: 0.88rem;
  opacity: 0.8;
  line-height: 1.5;
}

.panel-head .cog-row {
  margin-top: 0.42rem;
}

.panel-note.success,
.panel-note.error {
  opacity: 1;
}

.panel-note.success {
  color: #2f9e63;
}

.panel-note.error {
  color: #c45151;
}

.status-pop {
  animation: status-pop 300ms ease;
}

@keyframes status-pop {
  0% { transform: translateY(0); opacity: 0.82; }
  35% { transform: translateY(-2px); opacity: 1; }
  100% { transform: translateY(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .status-pop,
  .digit-char.ok,
  .digit-char.bad,
  .quiz-option,
  .speed-option,
  .rot-option,
  .math-option {
    animation: none !important;
    transition: none !important;
  }
}

@media (min-width: 860px) {
  .flash-layout {
    grid-template-columns: 1.25fr 1fr;
    align-items: start;
  }

  .flash-side {
    position: sticky;
    top: 4.4rem;
  }

  .cognitive-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .astro-hero,
  .astro-gate,
  .astro-panel {
    padding: 0.9rem;
  }

  .flash-card {
    min-height: 260px;
  }

  .quiz-option {
    padding: 0.62rem 0.62rem;
  }

  .cog-row {
    flex-direction: column;
    align-items: stretch;
  }

  .astro-gate-form .cog-row {
    gap: 0.42rem;
  }

  .leaderboard-controls .cog-row {
    gap: 0.42rem;
  }

  .cog-row .astro-btn,
  .cog-row .cog-input {
    width: 100%;
  }

  .astro-auth-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .rms-speed-label,
  .rms-speed-select {
    width: 100%;
  }

  .cog-input {
    max-width: none;
  }

  .cog-sequence {
    font-size: 1.18rem;
    letter-spacing: 0.14em;
  }

  .reaction-zone,
  .memory-grid {
    max-width: 100%;
  }

  .reaction-mode-tabs {
    gap: 0.32rem;
  }

  .speed-switcher {
    gap: 0.32rem;
  }

  .reaction-mode-tab {
    flex: 1 1 calc(50% - 0.2rem);
    min-height: 40px;
    font-size: 0.74rem;
    padding: 0.34rem 0.42rem;
  }

  #reaction-card .cog-row {
    flex-direction: row;
    gap: 0.35rem;
  }

  #reaction-card .cog-row .astro-btn {
    width: auto;
    flex: 1 1 0;
  }

  .speed-mode-tab {
    flex: 1 1 calc(50% - 0.2rem);
    min-height: 40px;
    font-size: 0.74rem;
    padding: 0.34rem 0.42rem;
  }

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

  .speed2-grid {
    max-width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .conc-rule-grid {
    grid-template-columns: 1fr;
  }

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

  .conc-action.top {
    grid-column: 1 / span 2;
    grid-row: 1;
  }

  .conc-triangle-wrap {
    grid-column: 1 / span 2;
    grid-row: 2;
  }

  .conc-action.bottom {
    grid-column: 1;
    grid-row: 3;
  }

  .conc-action.side {
    grid-column: 2;
    grid-row: 3;
    min-height: 48px;
  }

  .rot-options,
  .math-options {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 430px) {
  .speed-grid {
    grid-template-columns: 1fr;
  }

  .speed-option {
    font-size: 0.83rem;
  }

  .reaction-mode-tab {
    flex: 1 1 100%;
  }

  .speed-mode-tab {
    flex: 1 1 100%;
  }

  .speed2-grid {
    gap: 0.28rem;
  }
}