:root {
  color-scheme: dark;
}

.memory-page {
  display: grid;
  gap: 1.4rem;
}

.test-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: 1.4rem;
  align-items: start;
}

.test-left {
  position: relative;
  min-height: 420px;
}

.screen {
  display: none;
  min-height: 420px;
}

.screen.is-active {
  display: block;
}

.landing-card,
.countdown-card,
.result-card {
  background: linear-gradient(150deg, rgba(18, 22, 30, 0.98), rgba(10, 12, 18, 0.94));
  border: 1px solid var(--dk-border);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-sm);
}

.landing-title h2 {
  font-size: 1.4rem;
  color: var(--dk-text);
  margin-bottom: 6px;
}

.landing-sub {
  color: var(--dk-muted);
  margin-bottom: 16px;
}

.difficulty-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.difficulty-btn {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--dk-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--dk-text);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.difficulty-btn.active {
  background: rgba(210, 170, 104, 0.2);
  border-color: var(--dk-gold);
  color: var(--dk-gold);
}

.landing-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 18px 0 8px;
}

.landing-stats div {
  border: 1px solid rgba(138, 168, 197, 0.16);
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.02);
}

.stat-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--dk-muted);
}

.stat-value {
  display: block;
  font-size: 1.1rem;
  margin-top: 6px;
  color: var(--dk-text);
}

.landing-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.landing-notes {
  margin-top: 12px;
  color: var(--dk-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.landing-notes .muted {
  opacity: 0.8;
}

.countdown-card {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 10px;
  min-height: 360px;
}

.countdown-ring {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 1px solid rgba(138, 168, 197, 0.3);
  position: relative;
  box-shadow: inset 0 0 0 18px rgba(138, 168, 197, 0.05);
}

.countdown-text {
  font-size: clamp(2.8rem, 8vw, 4.6rem);
  font-family: 'Cormorant Garamond', serif;
  color: var(--dk-gold);
  animation: pulseScale 1s ease-in-out infinite;
}

@keyframes pulseScale {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.12); opacity: 0.7; }
}

.screen-test {
  position: relative;
  background: linear-gradient(150deg, rgba(18, 22, 30, 0.98), rgba(10, 12, 18, 0.94));
  border: 1px solid var(--dk-border);
  border-radius: var(--radius);
  padding: clamp(18px, 2.8vw, 28px);
  min-height: 460px;
  overflow: hidden;
}

.hud {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.phase-label {
  color: var(--dk-gold-soft);
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  text-transform: uppercase;
}

.grid-wrap {
  display: grid;
  gap: 6px;
  justify-content: center;
  align-items: center;
  margin: 8px 0;
}

.grid {
  display: grid;
  gap: 8px;
}

.grid-cell {
  width: clamp(44px, 8vw, 64px);
  height: clamp(44px, 8vw, 64px);
  border-radius: 12px;
  border: 1px solid rgba(138, 168, 197, 0.25);
  background: rgba(255, 255, 255, 0.02);
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.grid-cell.active {
  background: rgba(210, 170, 104, 0.35);
  border-color: rgba(210, 170, 104, 0.7);
  box-shadow: 0 8px 20px rgba(210, 170, 104, 0.16);
}

.grid-cell.locked {
  pointer-events: none;
}

.grid-cell.selectable:hover {
  transform: translateY(-1px);
  border-color: rgba(138, 168, 197, 0.45);
}

.recall-actions {
  display: none;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

.recall-actions.show {
  display: flex;
}

.hint-line {
  color: var(--dk-muted);
  font-size: 0.92rem;
}

.pause-overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 8, 12, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.pause-overlay.active {
  display: flex;
}

.pause-card {
  padding: 20px 24px;
  border-radius: 16px;
  border: 1px solid rgba(138, 168, 197, 0.25);
  background: rgba(10, 12, 18, 0.92);
  text-align: center;
}

.pause-card h3 {
  margin: 0 0 8px;
  font-size: 1.3rem;
}

.result-card {
  display: grid;
  gap: 16px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.result-item {
  border: 1px solid rgba(138, 168, 197, 0.18);
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.02);
  display: grid;
  gap: 6px;
}

.result-item span {
  color: var(--dk-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.result-item strong {
  font-size: 1.2rem;
  color: var(--dk-text);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.side-card {
  background: linear-gradient(150deg, rgba(18, 22, 30, 0.98), rgba(10, 12, 18, 0.94));
  border: 1px solid var(--dk-border);
  border-radius: 14px;
  padding: 16px;
  display: grid;
  gap: 10px;
  color: var(--dk-muted);
  font-size: 0.94rem;
}

.side-card h3 {
  color: var(--dk-text);
  font-size: 1.05rem;
}

.side-card ul {
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.focus-alert {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid rgba(29, 158, 117, 0.35);
  background: rgba(29, 158, 117, 0.1);
  color: #9ad7c5;
}

.focus-alert.is-warning {
  border-color: rgba(163, 45, 45, 0.4);
  background: rgba(163, 45, 45, 0.16);
  color: #f0b6b6;
}

@media (max-width: 1000px) {
  .test-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hud {
    flex-direction: column;
    align-items: flex-start;
  }
}