:root {
  color-scheme: dark;
  --bg: #06110c;
  --panel: #0d2118;
  --panel-strong: #112b20;
  --line: rgba(225, 204, 151, 0.22);
  --line-strong: rgba(225, 204, 151, 0.46);
  --gold: #ead7a7;
  --gold-strong: #f2d58e;
  --text: #f3f0e8;
  --muted: #939a91;
  --green: #2fbd78;
  --red: #df6d61;
  --radius: 26px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body.brain-game-page {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 88% 3%, rgba(234, 215, 167, 0.08), transparent 28rem),
    radial-gradient(circle at 4% 100%, rgba(24, 114, 76, 0.13), transparent 30rem),
    var(--bg);
  font-family: Inter, Avenir, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

.brain-topbar {
  width: min(1180px, calc(100% - 48px));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: clamp(20px, 3vw, 40px);
  border-bottom: 1px solid var(--line);
}

.brain-topbar > .language-switcher {
  margin-left: auto;
}

.brain-logo,
.brain-nav {
  display: flex;
  align-items: center;
}

.brain-logo {
  gap: 11px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.22em;
}

.brain-logo__mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-family: Georgia, serif;
  font-size: 18px;
  letter-spacing: 0;
}

.brain-nav {
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.brain-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  transition: color 160ms ease, background 160ms ease;
}

.brain-nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.brain-nav__back {
  width: 40px;
  text-align: center;
  border: 1px solid var(--line);
  color: var(--gold) !important;
}

.brain-main {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.brain-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 390px);
  gap: 44px;
  align-items: end;
  margin-bottom: 30px;
}

.brain-intro > div > p,
.brain-kicker {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.brain-intro h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(38px, 5.3vw, 72px);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.brain-instruction {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: clamp(16px, 1.55vw, 20px);
  line-height: 1.6;
}

.brain-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(19, 49, 36, 0.98), rgba(9, 28, 20, 0.98));
  box-shadow: var(--shadow);
}

.brain-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% -20%, rgba(234, 215, 167, 0.12), transparent 43%);
}

.brain-toolbar {
  position: relative;
  min-height: 74px;
  padding: 15px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}

.brain-settings,
.brain-stats,
.brain-size-picker,
.brain-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.brain-field {
  min-height: 42px;
  padding: 7px 11px;
  display: flex;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.brain-field input[type="number"] {
  width: 62px;
  padding: 4px 6px;
  border: 0;
  outline: 0;
  color: var(--text);
  background: transparent;
  text-align: center;
}

.brain-field input[type="range"] {
  width: 90px;
  accent-color: var(--gold-strong);
}

.brain-button {
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: #0a1710;
  background: var(--gold);
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.brain-button:hover {
  transform: translateY(-1px);
  background: #f2dfaf;
}

.brain-button:disabled {
  opacity: 0.48;
  cursor: default;
  transform: none;
}

.brain-button--quiet {
  color: var(--gold);
  background: transparent;
  border-color: var(--line);
}

.brain-button--quiet:hover {
  background: rgba(234, 215, 167, 0.08);
}

.brain-stat {
  min-width: 86px;
  display: grid;
  gap: 2px;
}

.brain-stat span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brain-stat strong {
  font-family: Georgia, serif;
  color: var(--gold);
  font-size: 22px;
  font-weight: 400;
}

.brain-stage {
  position: relative;
  min-height: 500px;
  padding: clamp(24px, 5vw, 58px);
  display: grid;
  place-items: center;
}

.brain-empty {
  width: min(100%, 460px);
  min-height: 300px;
  display: grid;
  place-items: center;
  text-align: center;
}

.brain-empty__icon {
  width: 92px;
  height: 92px;
  margin: 0 auto 24px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 28px;
  color: var(--gold);
  background: rgba(5, 18, 12, 0.54);
  font-family: Georgia, serif;
  font-size: 44px;
}

.brain-progress {
  width: min(300px, 72vw);
  height: 4px;
  margin: 22px auto 0;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.brain-progress > span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--gold);
  transition: width 220ms ease;
}

.brain-feedback {
  min-height: 24px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}

.brain-feedback.is-correct { color: #79dba8; }
.brain-feedback.is-wrong { color: #f09a91; }

.schulte-wrap {
  width: min(680px, 100%);
  display: grid;
  gap: 18px;
  justify-items: center;
}

.schulte-grid {
  --schulte-size: 5;
  width: min(680px, calc(100vw - 82px));
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(var(--schulte-size), 1fr);
  gap: clamp(3px, 0.7vw, 8px);
}

.schulte-cell {
  min-width: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: clamp(6px, 1vw, 13px);
  color: var(--text);
  background: rgba(4, 18, 12, 0.62);
  font-family: Georgia, serif;
  font-size: clamp(13px, calc(52px / var(--schulte-size) * 3), 34px);
  cursor: pointer;
  transition: background 130ms ease, color 130ms ease, transform 130ms ease;
}

.schulte-cell:hover { border-color: var(--line-strong); }
.schulte-cell.is-correct { color: #07130d; background: var(--gold); transform: scale(0.94); }
.schulte-cell.is-wrong { color: #fff; background: var(--red); }
.schulte-grid:not(.is-active) .schulte-cell { pointer-events: none; opacity: 0.55; }

.association-pair { display: grid; align-items: center; }
.association-link { color: var(--gold); font-size: 28px; text-align: center; }

.number-display {
  width: min(430px, 100%);
  aspect-ratio: 1.45;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  color: var(--gold);
  background: rgba(4, 18, 12, 0.65);
  font-family: Georgia, serif;
  font-size: clamp(72px, 13vw, 150px);
}

body.is-number-focus {
  overflow: hidden;
}

.number-focus {
  position: fixed;
  z-index: 1000;
  inset: 0;
  min-width: 320px;
  min-height: 100vh;
  min-height: 100dvh;
  padding: max(24px, env(safe-area-inset-top)) max(24px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left));
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  place-items: center;
  gap: 24px;
  color: var(--gold);
  background:
    radial-gradient(circle at 50% 42%, rgba(234, 215, 167, 0.1), transparent 32%),
    radial-gradient(circle at 50% 120%, rgba(28, 111, 76, 0.2), transparent 42%),
    #06110c;
}

.number-focus::before {
  content: "";
  position: absolute;
  inset: clamp(12px, 2vw, 28px);
  pointer-events: none;
  border: 1px solid var(--line);
  border-radius: clamp(22px, 3vw, 42px);
}

.number-focus .number-display {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  border: 0;
  border-radius: 0;
  color: var(--gold-strong);
  background: transparent;
  font-size: clamp(180px, 55vmin, 720px);
  line-height: 0.8;
  text-shadow: 0 0 70px rgba(242, 213, 142, 0.12);
  transition: opacity 180ms ease;
}

.number-focus__button {
  position: relative;
  z-index: 1;
  min-width: min(240px, 78vw);
  min-height: 58px;
  margin-bottom: clamp(10px, 3vh, 34px);
  font-size: 15px;
}

.number-focus.is-stopped .number-display {
  opacity: 0.24;
}

.number-answer {
  width: min(420px, 100%);
  display: grid;
  gap: 16px;
  justify-items: center;
}

.number-answer input {
  width: min(260px, 100%);
  height: 74px;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  outline: 0;
  color: var(--text);
  background: rgba(4, 18, 12, 0.65);
  font-family: Georgia, serif;
  font-size: 36px;
  text-align: center;
}

.number-answer input:focus { border-color: var(--gold); }

.memory-board-scroll {
  width: 100%;
  overflow: auto;
  scrollbar-color: rgba(234, 215, 167, 0.45) transparent;
}

.pyramid-toolbar__status {
  display: flex;
  align-items: center;
  gap: 22px;
}

.pyramid-status-details {
  display: flex;
  align-items: stretch;
}

.pyramid-mode-status {
  min-width: 210px;
  padding-left: 22px;
  display: grid;
  gap: 3px;
  border-left: 1px solid var(--line);
}

.pyramid-mode-status span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.pyramid-mode-status strong {
  color: var(--text);
  font-size: 13px;
  font-weight: 750;
}

.pyramid-difficulty-status {
  min-width: 126px;
}

.pyramid-settings-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.pyramid-settings-button svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

.pyramid-page .brain-stage {
  min-height: 610px;
  padding: clamp(24px, 4vw, 48px) clamp(8px, 3vw, 36px);
}

.pyramid-game {
  width: 100%;
  display: grid;
  justify-items: center;
  gap: clamp(18px, 3vw, 28px);
}

.pyramid-guide {
  max-width: 620px;
  margin: 0;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(4, 18, 12, 0.44);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.45;
  text-align: center;
}

.pyramid-scroll {
  width: 100%;
  overflow-x: auto;
  overflow-y: visible;
  padding: 5px 0 8px;
  scrollbar-color: rgba(234, 215, 167, 0.45) transparent;
}

.pyramid-board {
  --pyramid-cell-size: clamp(32px, 5.5vw, 64px);
  --pyramid-gap: clamp(3px, 0.7vw, 8px);
  width: max-content;
  min-width: 100%;
  display: grid;
  gap: var(--pyramid-gap);
  justify-items: center;
}

.pyramid-row {
  display: flex;
  gap: var(--pyramid-gap);
}

.pyramid-row[hidden] {
  display: none;
}

.pyramid-cell {
  width: var(--pyramid-cell-size);
  height: var(--pyramid-cell-size);
  min-width: 0;
  padding: 0 2px;
  border: 1px solid var(--line);
  border-radius: 50%;
  outline: 0;
  color: var(--text);
  background: linear-gradient(145deg, rgba(9, 34, 23, 0.92), rgba(3, 15, 10, 0.9));
  font-family: Georgia, serif;
  font-size: clamp(16px, 1.8vw, 22px);
  font-variant-numeric: tabular-nums;
  text-align: center;
  appearance: textfield;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035), 0 7px 16px rgba(0, 0, 0, 0.16);
  transition: border-color 150ms ease, background 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.pyramid-cell::-webkit-inner-spin-button,
.pyramid-cell::-webkit-outer-spin-button {
  margin: 0;
  appearance: none;
}

.pyramid-cell:not([readonly]):hover {
  border-color: var(--line-strong);
}

.pyramid-cell:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(234, 215, 167, 0.12), 0 10px 22px rgba(0, 0, 0, 0.22);
  transform: translateY(-1px);
}

.pyramid-cell.is-clue {
  border-color: rgba(242, 213, 142, 0.72);
  color: #0a1810;
  background: linear-gradient(145deg, #f6e6ba, #d8b968);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.52);
  cursor: default;
}

.pyramid-cell.is-correct {
  border-color: #70d7a2;
  background: rgba(22, 93, 61, 0.48);
  box-shadow: inset 0 0 0 1px var(--green), 0 0 0 3px rgba(47, 189, 120, 0.08);
}

.pyramid-cell.is-wrong {
  border-color: #ef8c82;
  background: rgba(103, 34, 29, 0.38);
  box-shadow: inset 0 0 0 1px var(--red), 0 0 0 3px rgba(223, 109, 97, 0.08);
}

body.is-pyramid-settings-open {
  overflow: hidden;
}

.pyramid-settings[hidden] {
  display: none;
}

.pyramid-settings {
  position: fixed;
  z-index: 2150;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease, visibility 200ms ease;
}

.pyramid-settings.is-visible {
  opacity: 1;
  visibility: visible;
}

.pyramid-settings__backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: rgba(2, 12, 8, 0.84);
  backdrop-filter: blur(12px);
  cursor: default;
}

.pyramid-settings__card {
  position: relative;
  width: min(880px, 100%);
  max-height: calc(100dvh - 48px);
  padding: clamp(24px, 4vw, 38px);
  overflow-y: auto;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background:
    radial-gradient(circle at 80% 0%, rgba(234, 215, 167, 0.12), transparent 18rem),
    linear-gradient(145deg, #133326, #081d14);
  box-shadow: 0 34px 110px rgba(0, 0, 0, 0.5);
  transform: translateY(16px) scale(0.98);
  transition: transform 220ms ease;
}

.pyramid-settings.is-visible .pyramid-settings__card {
  transform: translateY(0) scale(1);
}

.pyramid-settings__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.pyramid-settings__header p {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.18em;
}

.pyramid-settings__header h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 500;
  line-height: 1.08;
}

.pyramid-settings__close {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  background: rgba(4, 18, 12, 0.52);
  font-size: 25px;
  line-height: 1;
  cursor: pointer;
}

.pyramid-settings__close:hover {
  border-color: var(--line-strong);
  color: var(--text);
}

.pyramid-settings__section {
  margin-top: 28px;
}

.pyramid-settings__section h3 {
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.pyramid-settings__section h3 span {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--gold);
  background: rgba(234, 215, 167, 0.06);
  font-family: Georgia, serif;
  font-size: 13px;
  letter-spacing: 0;
}

.pyramid-mode-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.pyramid-difficulty-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.pyramid-mode-option {
  min-width: 0;
  min-height: 158px;
  padding: 22px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 20px;
  color: var(--text);
  background: rgba(4, 18, 12, 0.48);
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.pyramid-mode-option:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.pyramid-mode-option:focus-visible {
  outline: 3px solid rgba(234, 215, 167, 0.18);
  outline-offset: 2px;
}

.pyramid-mode-option.is-selected {
  border-color: var(--gold);
  background: rgba(234, 215, 167, 0.1);
}

.pyramid-mode-option__icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  color: var(--gold);
  background: rgba(234, 215, 167, 0.06);
  font-family: Georgia, serif;
  font-size: 22px;
}

.pyramid-mode-option__copy {
  display: grid;
  gap: 8px;
}

.pyramid-mode-option__copy strong {
  color: var(--text);
  font-size: 15px;
  line-height: 1.35;
}

.pyramid-mode-option__copy small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 550;
  line-height: 1.55;
}

.pyramid-mode-option__check {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: transparent;
  font-size: 13px;
  font-weight: 900;
}

.pyramid-mode-option.is-selected .pyramid-mode-option__check {
  border-color: var(--gold);
  color: #0a1710;
  background: var(--gold);
}

.pyramid-difficulty-option {
  min-height: 112px;
  padding: 18px;
}

.pyramid-difficulty-option .pyramid-mode-option__icon {
  width: 38px;
  height: 38px;
  font-size: 18px;
}

.pyramid-settings__actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

.pyramid-result[hidden] {
  display: none;
}

.pyramid-result {
  position: fixed;
  z-index: 2200;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  overflow: hidden;
  background: rgba(2, 12, 8, 0.88);
  backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 200ms ease, visibility 200ms ease;
}

.pyramid-result.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.pyramid-result__card {
  position: relative;
  z-index: 2;
  width: min(570px, 100%);
  display: grid;
  justify-items: center;
  padding: clamp(30px, 6vw, 58px);
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 0%, rgba(234, 215, 167, 0.15), transparent 19rem),
    linear-gradient(145deg, rgba(20, 54, 39, 0.98), rgba(7, 27, 18, 0.99));
  box-shadow: 0 34px 110px rgba(0, 0, 0, 0.5);
  text-align: center;
  transform: translateY(18px) scale(0.96);
  transition: transform 260ms ease;
}

.pyramid-result.is-visible .pyramid-result__card {
  transform: translateY(0) scale(1);
}

.pyramid-result.is-perfect .pyramid-result__card {
  border-color: rgba(234, 215, 167, 0.68);
  box-shadow: 0 34px 110px rgba(0, 0, 0, 0.5), 0 0 70px rgba(234, 215, 167, 0.1);
}

.pyramid-result__icon {
  width: clamp(92px, 15vw, 132px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 4px solid currentColor;
  border-radius: 50%;
  color: var(--gold);
  font-family: Inter, Avenir, "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(54px, 9vw, 78px);
  font-weight: 900;
  line-height: 1;
}

.pyramid-result.is-perfect .pyramid-result__icon {
  color: #78dfa9;
  animation: pyramid-success-pop 650ms cubic-bezier(0.2, 0.9, 0.3, 1.35) both;
}

.pyramid-result.is-try-again .pyramid-result__icon {
  animation: pyramid-encourage-pulse 1.8s ease-in-out infinite;
}

.pyramid-result__kicker {
  margin: 24px 0 8px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.18em;
}

.pyramid-result__card h2 {
  margin: 0;
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 500;
  line-height: 1.1;
}

.pyramid-result__score {
  margin-top: 24px;
  color: var(--gold-strong);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 500;
}

.pyramid-result__message {
  max-width: 420px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: clamp(14px, 2vw, 17px);
  line-height: 1.6;
}

.pyramid-result__actions {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 30px;
}

.pyramid-fireworks {
  position: absolute;
  z-index: 1;
  inset: 0;
  display: none;
  pointer-events: none;
}

.pyramid-result.is-perfect .pyramid-fireworks {
  display: block;
}

.pyramid-firework {
  position: absolute;
  left: var(--firework-x);
  top: var(--firework-y);
  width: 4px;
  height: 4px;
}

.pyramid-firework i {
  position: absolute;
  left: 0;
  top: 0;
  width: 6px;
  height: 22px;
  border-radius: 999px;
  background: var(--firework-color);
  box-shadow: 0 0 13px var(--firework-color);
  opacity: 0;
  transform-origin: 50% 100%;
  animation: pyramid-firework-burst 2.15s var(--firework-delay) ease-out infinite;
}

@keyframes pyramid-firework-burst {
  0%, 12% {
    opacity: 0;
    transform: rotate(calc(var(--particle) * 30deg)) translateY(0) scaleY(0.15);
  }
  18% { opacity: 1; }
  64% {
    opacity: 0;
    transform: rotate(calc(var(--particle) * 30deg)) translateY(-112px) scaleY(0.75);
  }
  100% { opacity: 0; }
}

@keyframes pyramid-success-pop {
  0% { opacity: 0; transform: scale(0.4) rotate(-12deg); }
  70% { opacity: 1; transform: scale(1.08) rotate(2deg); }
  100% { transform: scale(1) rotate(0); }
}

@keyframes pyramid-encourage-pulse {
  0%, 100% { transform: rotate(0) scale(1); box-shadow: 0 0 0 0 rgba(234, 215, 167, 0); }
  50% { transform: rotate(-18deg) scale(1.06); box-shadow: 0 0 0 14px rgba(234, 215, 167, 0.08); }
}

.brain-size-picker a {
  min-width: 44px;
  height: 38px;
  padding: 0 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.brain-size-picker a.is-active {
  border-color: var(--gold);
  color: #07130d;
  background: var(--gold);
}

.memory-stage {
  min-height: 520px;
  padding: clamp(18px, 3vw, 34px);
}

.memory-board {
  --memory-size: 4;
  width: min(680px, calc(100vw - 110px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(var(--memory-size), 1fr);
  gap: clamp(3px, 0.7vw, 8px);
}

.memory-board[data-large="true"] {
  width: calc(var(--memory-size) * 58px);
}

.memory-card {
  position: relative;
  aspect-ratio: 1;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: clamp(5px, 1vw, 13px);
  background: linear-gradient(145deg, #173e2d, #081b12);
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 280ms ease, border-color 180ms ease, opacity 180ms ease;
}

.memory-card__back,
.memory-symbol {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.memory-card__back {
  padding: 12%;
  color: var(--gold);
  background: radial-gradient(circle at 50% 15%, rgba(234, 215, 167, 0.13), transparent 61%);
  opacity: 1;
  transition: opacity 90ms ease;
}

.memory-card__orbit {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  opacity: 0.38;
}

.memory-card__orbit--inner {
  stroke-width: 1;
  opacity: 0.22;
}

.memory-card__planet,
.memory-card__star {
  fill: currentColor;
}

.memory-card__planet {
  opacity: 0.72;
}

.memory-card__star {
  filter: drop-shadow(0 0 5px rgba(242, 213, 142, 0.28));
}

.memory-symbol {
  color: var(--symbol-color);
  opacity: 0;
  transition: opacity 90ms ease;
}

.memory-symbol__paper {
  fill: #eee8d8;
}

.memory-symbol__ornament {
  fill: var(--symbol-color);
  opacity: 0.3;
}

.memory-symbol__ornament > circle:first-child {
  fill: none;
  stroke: var(--symbol-color);
  stroke-width: 1.4;
  stroke-dasharray: 2.5 4;
}

.memory-symbol__shape {
  filter: drop-shadow(0 3px 2px rgba(37, 27, 12, 0.2));
}

.memory-symbol__fill {
  fill: var(--symbol-color);
  stroke: var(--symbol-dark);
  stroke-width: 1.4;
  stroke-linejoin: round;
}

.memory-symbol__stroke {
  fill: none;
  stroke: var(--symbol-dark);
  stroke-width: 5;
  stroke-linecap: round;
}

.memory-symbol__cutout {
  fill: #eee8d8;
  stroke: var(--symbol-dark);
  stroke-width: 1.2;
}

.memory-symbol--family-1 .memory-symbol__ornament {
  transform: rotate(15deg);
  transform-origin: center;
}

.memory-symbol--family-2 .memory-symbol__ornament {
  transform: rotate(30deg) scale(0.94);
  transform-origin: center;
}

.memory-symbol--family-3 .memory-symbol__ornament {
  transform: rotate(45deg);
  transform-origin: center;
}

.memory-symbol--family-4 .memory-symbol__ornament {
  transform: rotate(60deg) scale(0.94);
  transform-origin: center;
}

.memory-symbol--family-5 .memory-symbol__ornament {
  transform: rotate(75deg);
  transform-origin: center;
}

.memory-card.is-open,
.memory-card.is-matched {
  transform: translateY(-2px) scale(0.985);
  border-color: var(--gold);
}

.memory-card.is-open .memory-card__back,
.memory-card.is-matched .memory-card__back {
  opacity: 0;
}

.memory-card.is-open .memory-symbol,
.memory-card.is-matched .memory-symbol {
  opacity: 1;
}

.memory-card.is-matched { opacity: 0.56; }
.memory-board.is-paused { pointer-events: none; filter: blur(12px); opacity: 0.3; }

.brain-result {
  width: min(460px, 100%);
  display: grid;
  justify-items: center;
  gap: 14px;
  text-align: center;
}

.brain-result strong {
  color: var(--gold);
  font-family: Georgia, serif;
  font-size: clamp(50px, 9vw, 90px);
  font-weight: 400;
  line-height: 1;
}

.brain-result p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.brain-result__kicker {
  color: var(--gold);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.2em;
}

.color-focus-stage,
.sequence-memory-stage,
.odd-one-out-stage {
  min-height: 560px;
}

.color-focus-start > div,
.sequence-start > div,
.odd-start > div {
  width: min(440px, 100%);
}

.color-focus-start h2,
.sequence-start h2,
.odd-start h2 {
  margin: 24px 0 10px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(27px, 4vw, 38px);
  font-weight: 500;
}

.color-focus-start p,
.sequence-start p,
.odd-start p {
  margin: 0 auto 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.color-focus-start__orbs {
  height: 102px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.color-focus-start__orbs i {
  width: 70px;
  height: 70px;
  margin: 0 -7px;
  border: 5px solid #0c2118;
  border-radius: 50%;
  background: #ef6f61;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
}

.color-focus-start__orbs i:nth-child(2) {
  z-index: 2;
  width: 88px;
  height: 88px;
  background: #62a8ff;
}

.color-focus-start__orbs i:nth-child(3) { background: #5ed39a; }

.color-focus-game {
  width: min(820px, 100%);
  display: grid;
  gap: 22px;
  justify-items: center;
}

.color-focus-meta {
  width: min(560px, 100%);
  display: grid;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  text-align: center;
}

.color-focus-timer {
  width: 100%;
  height: 4px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.color-focus-timer i {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), var(--gold));
  transform-origin: left center;
}

.color-focus-word {
  width: min(720px, 100%);
  min-height: 190px;
  padding: 24px;
  display: grid;
  place-items: center;
  overflow-wrap: anywhere;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.05), transparent 15rem),
    rgba(3, 15, 10, 0.68);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(38px, 7vw, 86px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.035em;
  text-align: center;
}

.color-focus-options {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 9px;
}

.color-focus-option {
  min-width: 0;
  min-height: 66px;
  padding: 9px 8px;
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 15px;
  color: var(--text);
  background: rgba(4, 18, 12, 0.64);
  font-size: 11px;
  font-weight: 750;
  line-height: 1.25;
  cursor: pointer;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.color-focus-option:hover:not(:disabled) {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.color-focus-option i {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
}

.color-focus-option span { overflow-wrap: anywhere; }
.color-focus-option:disabled { cursor: default; }
.color-focus-option.is-correct { border-color: var(--green); background: rgba(47, 189, 120, 0.14); }
.color-focus-option.is-wrong { border-color: var(--red); background: rgba(223, 109, 97, 0.13); }

.sequence-start__icon {
  width: min(210px, 70vw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.sequence-start__icon i {
  aspect-ratio: 1;
  border: 1px solid rgba(240, 220, 174, 0.34);
  border-radius: 14px;
  background: #d7ae45;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.2);
}

.sequence-start__icon i:nth-child(2) { background: #42a979; transform: translateY(10px); }
.sequence-start__icon i:nth-child(3) { background: #d97563; }
.sequence-start__icon i:nth-child(4) { background: #528ac8; transform: translateY(10px); }

.sequence-game {
  width: min(520px, 100%);
  display: grid;
  justify-items: center;
  gap: 22px;
}

.sequence-status-wrap {
  width: min(360px, 82%);
  display: grid;
  gap: 11px;
}

.sequence-status {
  min-height: 24px;
  margin: 0;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

.sequence-status-wrap .brain-progress {
  width: 100%;
  margin: 0;
}

.sequence-board {
  width: min(420px, 100%);
  aspect-ratio: 1;
  padding: clamp(10px, 2vw, 17px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(8px, 1.6vw, 14px);
  border: 1px solid var(--line);
  border-radius: 32px;
  background: rgba(3, 14, 9, 0.46);
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.18), 0 24px 54px rgba(0, 0, 0, 0.2);
}

.sequence-tile {
  position: relative;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: clamp(17px, 3vw, 28px);
  background: var(--sequence-color);
  box-shadow: inset 0 -18px 30px rgba(0, 0, 0, 0.2), 0 10px 26px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  opacity: 0.72;
  transition: opacity 130ms ease, transform 130ms ease, box-shadow 130ms ease, filter 130ms ease;
}

.sequence-tile::before {
  content: "";
  position: absolute;
  inset: 29%;
  border: 2px solid rgba(255, 255, 255, 0.45);
  transform: rotate(45deg);
}

.sequence-tile--gold { --sequence-color: #d7ae45; }
.sequence-tile--green { --sequence-color: #42a979; }
.sequence-tile--coral { --sequence-color: #d97563; }
.sequence-tile--blue { --sequence-color: #528ac8; }

.sequence-tile:hover:not(:disabled) { opacity: 0.9; transform: translateY(-2px); }
.sequence-tile:disabled { cursor: default; }
.sequence-tile.is-active {
  z-index: 2;
  opacity: 1;
  filter: saturate(1.28) brightness(1.35);
  transform: scale(0.96);
  box-shadow: inset 0 0 30px rgba(255, 255, 255, 0.35), 0 0 35px var(--sequence-color);
}
.sequence-tile.is-wrong { box-shadow: inset 0 0 0 4px #f9b0a8, 0 0 32px rgba(223, 109, 97, 0.6); }

.odd-start__icon {
  width: 150px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
}

.odd-start__icon i {
  aspect-ratio: 1;
  border: 1px solid rgba(240, 220, 174, 0.24);
  border-radius: 10px;
  background: #3d956d;
}

.odd-start__icon i:nth-child(6) {
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 22px rgba(234, 215, 167, 0.32);
}

.odd-game {
  width: min(620px, 100%);
  display: grid;
  gap: 16px;
  justify-items: center;
}

.odd-game__topline {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
}

.odd-game__topline p { margin: 0; }
.odd-game__topline span { color: var(--gold); }

.odd-grid {
  --odd-grid-size: 3;
  width: min(540px, 100%);
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(var(--odd-grid-size), 1fr);
  gap: clamp(5px, 1vw, 10px);
}

.odd-cell {
  min-width: 0;
  padding: 18%;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: clamp(9px, 1.5vw, 17px);
  background: rgba(4, 18, 12, 0.66);
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.odd-cell:hover:not(:disabled) {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.odd-cell:disabled { cursor: default; }
.odd-cell.is-wrong { border-color: var(--red); background: rgba(223, 109, 97, 0.12); opacity: 0.48; }
.odd-cell.is-correct { border-color: var(--green); background: rgba(47, 189, 120, 0.14); transform: scale(0.92); }

.odd-symbol {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  background: var(--odd-symbol-color);
  filter: drop-shadow(0 6px 8px rgba(0, 0, 0, 0.25));
}

.odd-symbol--circle { border-radius: 50%; }
.odd-symbol--square { border-radius: 18%; }
.odd-symbol--diamond { transform: rotate(45deg) scale(0.75); border-radius: 12%; }
.odd-symbol--triangle { clip-path: polygon(50% 5%, 96% 91%, 4% 91%); }
.odd-symbol--star { clip-path: polygon(50% 0%, 61% 35%, 98% 36%, 68% 57%, 79% 94%, 50% 72%, 21% 94%, 32% 57%, 2% 36%, 39% 35%); }
.odd-symbol--hexagon { clip-path: polygon(25% 7%, 75% 7%, 100% 50%, 75% 93%, 25% 93%, 0 50%); }

[hidden] { display: none !important; }

@media (max-width: 760px) {
  .brain-topbar,
  .brain-main {
    width: min(100% - 28px, 1180px);
  }

  .brain-topbar { min-height: 68px; }
  .brain-logo > span:last-child { display: none; }
  .brain-nav { gap: 3px; }
  .brain-nav a { padding: 9px 10px; }

  .brain-main { padding-top: 32px; }

  .brain-intro {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 24px;
  }

  .brain-intro h1 { font-size: clamp(36px, 12vw, 58px); }
  .brain-instruction { max-width: 35rem; }
  .brain-toolbar { align-items: flex-start; }
  .brain-settings { width: 100%; }
  .brain-field { flex: 1; }
  .brain-stage { min-height: 430px; padding: 22px 16px; }
  .schulte-grid { width: min(100%, calc(100vw - 62px)); }
  .memory-board { width: min(100%, calc(100vw - 62px)); }
  .memory-stage { min-height: 420px; }
  .pyramid-toolbar {
    display: grid;
    grid-template-columns: 1fr;
    align-items: stretch;
    gap: 13px;
  }
  .pyramid-toolbar__status {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(72px, 0.8fr) minmax(118px, 1.35fr) minmax(78px, 0.85fr);
    gap: 0;
  }
  .pyramid-status-details {
    display: contents;
  }
  .pyramid-mode-status {
    min-width: 0;
    padding-left: 16px;
    overflow: hidden;
    text-align: left;
  }
  .pyramid-difficulty-status { min-width: 92px; }
  .pyramid-mode-status strong {
    display: block;
    font-size: 12px;
    line-height: 1.25;
  }
  .pyramid-actions {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(44px, auto) minmax(76px, 1fr) minmax(96px, 1.2fr);
  }
  .pyramid-actions .brain-button {
    min-width: 0;
    padding-inline: 14px;
  }
  .pyramid-page .brain-stage {
    min-height: 0;
    padding: 24px 8px 30px;
  }
  .pyramid-game { gap: 18px; }
  .pyramid-guide {
    max-width: calc(100% - 16px);
    padding: 8px 12px;
    border-radius: 14px;
    font-size: 12px;
  }
  .pyramid-board {
    --pyramid-cell-size: clamp(32px, 8.6vw, 43px);
    --pyramid-gap: clamp(2px, 0.8vw, 4px);
  }
  .pyramid-cell {
    font-size: 16px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), 0 4px 10px rgba(0, 0, 0, 0.15);
  }
  .pyramid-settings {
    align-items: end;
    padding: 12px;
  }
  .pyramid-settings__card {
    width: 100%;
    max-height: calc(100dvh - 24px);
    padding: 24px;
    overflow-y: auto;
    border-radius: 24px;
    transform: translateY(26px);
  }
  .pyramid-mode-options {
    grid-template-columns: 1fr;
    gap: 9px;
  }
  .pyramid-difficulty-options {
    grid-template-columns: 1fr;
    gap: 9px;
  }
  .pyramid-mode-option {
    min-height: 0;
    padding: 16px;
  }
  .pyramid-difficulty-option {
    grid-template-columns: 38px minmax(0, 1fr) 22px;
  }
  .color-focus-stage,
  .sequence-memory-stage,
  .odd-one-out-stage { min-height: 470px; }
  .color-focus-word {
    min-height: 145px;
    border-radius: 22px;
  }
  .color-focus-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .color-focus-option:last-child { grid-column: 1 / -1; }
  .sequence-board { width: min(390px, 100%); }
  .odd-grid { width: min(520px, 100%); }
  .pyramid-result { padding: 14px; }
  .pyramid-result__card { border-radius: 22px; }
}

@media (max-width: 460px) {
  .brain-nav__games { font-size: 0; }
  .brain-nav__games::after { content: attr(data-short-label); font-size: 13px; }
  .brain-toolbar { padding: 13px; }
  .brain-field { width: 100%; justify-content: space-between; }
  .brain-settings .brain-button { width: 100%; }
  .brain-stats { width: 100%; justify-content: space-between; }
  .color-focus-page .brain-toolbar,
  .sequence-memory-page .brain-toolbar,
  .odd-one-out-page .brain-toolbar { flex-wrap: wrap; }
  .color-focus-page .brain-stats,
  .sequence-memory-page .brain-stats,
  .odd-one-out-page .brain-stats { flex: 1 0 100%; }
  .color-focus-page .brain-stat,
  .sequence-memory-page .brain-stat,
  .odd-one-out-page .brain-stat {
    min-width: 0;
    flex: 1;
  }
  .color-focus-page .brain-stat strong,
  .sequence-memory-page .brain-stat strong,
  .odd-one-out-page .brain-stat strong { white-space: nowrap; }
  .color-focus-page .brain-toolbar > .brain-button,
  .sequence-memory-page .brain-toolbar > .brain-button,
  .odd-one-out-page .brain-toolbar > .brain-button {
    flex: 1 0 100%;
    width: 100%;
  }
  .color-focus-game { gap: 16px; }
  .color-focus-word {
    min-height: 120px;
    padding: 17px 10px;
    font-size: clamp(29px, 10vw, 44px);
  }
  .color-focus-option {
    min-height: 55px;
    grid-template-columns: 15px minmax(0, 1fr);
    font-size: 10px;
  }
  .color-focus-option i { width: 15px; height: 15px; }
  .sequence-board { border-radius: 22px; }
  .odd-cell { padding: 20%; }
  .pyramid-toolbar__status {
    grid-template-columns: minmax(64px, 0.7fr) minmax(112px, 1.4fr) minmax(72px, 0.8fr);
  }
  .pyramid-mode-status { padding-left: 10px; }
  .pyramid-mode-status span { font-size: 8px; }
  .pyramid-mode-status strong { font-size: 11px; }
  .pyramid-settings-button span { display: none; }
  .pyramid-settings-button {
    width: 44px;
    padding: 0;
    justify-content: center;
  }
  .pyramid-settings__card { padding: 21px 16px 16px; }
  .pyramid-settings__header { gap: 14px; }
  .pyramid-mode-option {
    grid-template-columns: 38px minmax(0, 1fr) 22px;
    gap: 11px;
    padding: 14px;
  }
  .pyramid-mode-option__icon {
    width: 38px;
    height: 38px;
  }
  .pyramid-settings__actions {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
  }
  .pyramid-settings__actions .brain-button { padding-inline: 12px; }
  .pyramid-result__actions { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .pyramid-firework i,
  .pyramid-result.is-perfect .pyramid-result__icon,
  .pyramid-result.is-try-again .pyramid-result__icon,
  .sequence-tile {
    animation: none;
    transition: none;
  }

  .pyramid-result__card,
  .pyramid-settings__card {
    transform: none;
    transition: none;
  }
}

/* Association and Memory chain: shared, child-friendly picture sessions. */
.picture-memory-page {
  --picture-cream: #fff9ec;
  --picture-mint: #b9edcf;
  --picture-coral: #ffc0af;
}
.picture-memory-page .brain-intro h1 { font-size: clamp(36px, 4.4vw, 60px); }
.picture-memory-page .brain-main { padding-top: 32px; }
.picture-memory-page .brain-stage { min-height: 470px; padding: 30px; }
.picture-memory-page .brain-button { min-height: 48px; font-size: 14px; }
.picture-memory-page button:focus-visible { outline: 3px solid #9bd9ff; outline-offset: 4px; }
.picture-session-header { display: flex; align-items: center; gap: 18px; }
.picture-speed-field { display: grid; grid-template-columns: auto minmax(90px, 130px) auto; gap: 10px; }
.picture-speed-control { display: grid; gap: 5px; min-width: 0; }
.picture-speed-field input[type="range"] { width: 100%; min-width: 0; margin: 0; }
.picture-speed-scale { display: flex; justify-content: space-between; color: #b9cec1; font-size: 10px; line-height: 1.2; }
.picture-speed-field output { color: var(--gold); font-size: 12px; font-weight: 800; white-space: nowrap; font-variant-numeric: tabular-nums; }
.picture-phase { padding: 9px 14px; border-radius: 999px; background: #244a39; color: #d7f4df; font-size: 12px; font-weight: 800; }
.picture-start { width: min(620px, 100%); text-align: center; padding: 22px 0; }
.picture-start h2, .picture-ready h2, .picture-result h2 { margin: 22px 0 12px; font-size: clamp(24px, 3vw, 34px); line-height: 1.2; letter-spacing: -.025em; }
.picture-start p, .picture-ready p, .picture-result > p { color: #bacbbf; line-height: 1.6; max-width: 460px; margin: 0 auto 24px; }
.picture-preview { display: flex; align-items: center; justify-content: center; padding: 10px; }
.picture-preview img { width: clamp(70px, 12vw, 116px); aspect-ratio: 1; object-fit: contain; padding: 7px; background: var(--picture-cream); border-radius: 20px; box-shadow: 0 12px 28px #0004; }
.picture-preview img:first-child { transform: rotate(-12deg) translateX(9px); }
.picture-preview img:nth-child(2) { position: relative; z-index: 1; transform: translateY(-8px); }
.picture-preview img:last-child { transform: rotate(12deg) translateX(-9px); }
.picture-how { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin: 0 0 28px; }
.picture-how span { padding: 9px 13px; border: 1px solid #b9edcf30; border-radius: 999px; font-size: 12px; font-weight: 700; color: #cce6d7; }
.picture-load-status { min-height: 22px; font-size: 13px; margin: 12px 0 0 !important; }
body.is-picture-focus { overflow: hidden; }
.is-picture-focus .picture-panel { position: fixed; z-index: 1800; inset: 0; border-radius: 0; border: 0; display: grid; grid-template-rows: auto minmax(0, 1fr); background: radial-gradient(ellipse at 50% 0, #224d3a, #0c231a 70%); }
.is-picture-focus .picture-panel::before { display: none; }
.is-picture-focus .brain-toolbar { padding: max(12px, env(safe-area-inset-top)) max(22px, env(safe-area-inset-right)) 12px max(22px, env(safe-area-inset-left)); background: #0c231ae8; }
.is-picture-focus .brain-settings { display: none; }
.is-picture-focus .picture-session-header { width: 100%; justify-content: space-between; }
.is-picture-focus .picture-session-header .brain-stat { text-align: right; }
.is-picture-focus .picture-stage { min-height: 0; overflow-y: auto; overscroll-behavior: contain; display: block; padding: 18px 24px 26px; }
.picture-session { width: min(1160px, 100%); margin: 0 auto; display: grid; gap: 18px; }
.picture-session:has(> .picture-learn:not([hidden])) { width: min(1360px, 100%); height: 100%; min-height: 0; grid-template-rows: auto minmax(0, 1fr); gap: 12px; }
.picture-trail { list-style: none; display: flex; justify-content: center; flex-wrap: wrap; gap: 7px; padding: 0; margin: 0; }
.picture-trail-step { min-width: 34px; height: 34px; display: grid; place-items: center; padding: 0 7px; border-radius: 11px; border: 1px solid #d1e8d638; color: #b8cec0; font-size: 12px; font-weight: 800; }
.picture-trail-step.is-current { background: var(--gold); color: #183428; border-color: var(--gold); box-shadow: 0 0 0 3px #ead7a722; }
.picture-trail-step.is-seen { background: #315843; color: #fff; }
.picture-trail-step.is-correct { background: var(--picture-mint); border-color: var(--picture-mint); color: #17452d; }
.picture-trail-step.is-wrong { background: var(--picture-coral); border-color: var(--picture-coral); color: #632f24; }
.picture-learn { height: 100%; min-height: 0; display: grid; grid-template-rows: auto minmax(0, 1fr) auto; justify-items: center; gap: 14px; }
.picture-learn-visual { width: 100%; height: 100%; min-height: 0; display: grid; place-items: center; container-type: size; }
.picture-learn h2 { margin: 6px 0 0; font-size: clamp(18px, 2.2vw, 24px); text-align: center; }
.picture-memory-page .association-pair { width: min(1280px, 100%); grid-template-columns: minmax(0, 1fr) 42px minmax(0, 1fr); gap: 20px; }
.picture-card { min-width: 0; margin: 0; width: 100%; padding: 9px; border-radius: 24px; background: var(--picture-cream); color: #244735; box-shadow: 0 12px 30px #0003; }
.picture-frame { display: block; width: 100%; aspect-ratio: 1; overflow: hidden; border-radius: 16px; background: #f2ecdf; }
.picture-frame img { display: block; width: 100%; height: 100%; object-fit: contain; object-position: center; }
.picture-card figcaption { min-height: 30px; display: grid; place-items: center; padding: 8px 4px 2px; font-size: 14px; font-weight: 800; text-align: center; }
.picture-learn .picture-card { max-width: min(100%, calc(100cqh - 40px)); justify-self: center; }
.picture-learn .picture-card figcaption { height: 40px; min-height: 40px; padding: 5px 4px 1px; font-size: clamp(12px, 1.4vw, 18px); line-height: 1.15; }
.memory-picture { width: 100%; }
.picture-learn-controls { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; padding-bottom: 8px; }
.picture-ready { padding: clamp(36px, 10vh, 90px) 12px; text-align: center; }
.picture-ready-icon { width: 76px; height: 76px; display: grid; place-items: center; margin: 0 auto; font-size: 42px; color: var(--gold); border-radius: 25px; background: #ead7a714; border: 1px solid #ead7a735; }
.picture-quiz { display: grid; grid-template-columns: minmax(180px, 260px) minmax(0, 1fr); gap: 28px; align-items: center; }
.picture-question { display: grid; gap: 16px; justify-items: center; }
.picture-question h2 { font-size: clamp(17px, 2vw, 23px); text-align: center; margin: 0; line-height: 1.4; }
.picture-question .picture-card { width: min(240px, 100%); }
.picture-options { min-width: 0; width: 100%; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.picture-options[data-size="medium"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.picture-options[data-size="large"] { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.picture-option { min-width: 0; display: flex; flex-direction: column; padding: 7px; border: 3px solid transparent; border-radius: 20px; background: var(--picture-cream); color: #234331; cursor: pointer; box-shadow: 0 7px 16px #0002; transition: border-color 140ms ease, transform 140ms ease; }
.picture-option:hover:not(:disabled) { transform: translateY(-3px); border-color: var(--gold-strong); }
.picture-option-caption { display: flex; align-items: center; gap: 7px; min-height: 33px; padding-top: 7px; font-size: 12px; font-weight: 800; text-align: left; line-height: 1.25; }
.picture-option-caption > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.picture-option-badge { flex: 0 0 23px; height: 23px; display: grid; place-items: center; border-radius: 8px; background: #e7e9db; color: #50654e; font-size: 12px; }
.picture-option:disabled { cursor: default; }
.picture-option.is-correct { border-color: #69d39a; background: #e6ffef; box-shadow: 0 0 0 3px #69d39a35; }
.picture-option.is-correct .picture-option-badge { background: #23774b; color: white; font-size: 17px; }
.picture-option.is-wrong { border-color: #fa9b83; background: #fff0e9; box-shadow: 0 0 0 3px #fa9b8325; }
.picture-option.is-wrong .picture-option-badge { background: #a34732; color: white; font-size: 21px; }
.picture-answer-bar { position: sticky; bottom: -26px; z-index: 3; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 18px; border: 1px solid #cdebd735; border-radius: 20px; background: #153628; box-shadow: 0 -10px 25px #0c231a66; }
.picture-feedback { min-width: 0; flex: 1; min-height: 36px; display: flex; align-items: center; gap: 12px; color: #b9cec1; line-height: 1.4; font-size: 14px; font-weight: 750; }
.picture-feedback-answer { width: 48px; height: 48px; flex-shrink: 0; object-fit: contain; border: 2px solid #69d39a; border-radius: 10px; background: #e6ffef; }
.picture-feedback.is-correct { color: #c0f5d4; }
.picture-feedback.is-wrong { color: #ffd0c1; }
.picture-feedback-icon { flex: 0 0 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; background: var(--picture-mint); color: #16462d; font-size: 25px; }
.picture-feedback.is-wrong .picture-feedback-icon { background: var(--picture-coral); color: #733424; }
.picture-answer-bar .brain-button { flex-shrink: 0; }
.memory-picture-quiz { grid-template-columns: 1fr; gap: 20px; }
.memory-question { display: flex; justify-content: center; align-items: center; gap: 15px; }
.picture-position { width: 55px; height: 55px; flex-shrink: 0; display: grid; place-items: center; border-radius: 18px; background: var(--gold); color: #204131; font-size: 28px; font-weight: 850; }
.memory-question h2 { margin: 0 0 5px; font-size: 23px; }
.memory-question p { margin: 0; font-size: 14px; color: #bdcfc2; }
/* Keep empty columns as choices disappear so the final picture cannot fill the grid. */
.memory-picture-quiz .picture-options[data-size="small"] { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); max-width: 980px; justify-self: center; }
.picture-result { width: min(1040px, 100%); margin: 12px auto; text-align: center; }
.picture-result > strong { display: block; color: var(--picture-mint); font-size: clamp(42px, 7vw, 70px); margin: 14px 0; }
.picture-result h3 { margin: 32px 0 18px; font-size: 18px; }
.picture-review { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.picture-review-item { min-width: 0; margin: 0; padding: 9px; border: 2px solid #a4dfbc; border-radius: 18px; background: #fcf6e9; color: #274431; }
.picture-review-item.is-wrong { border-color: #efa38c; }
.picture-review-images { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.picture-review-item figcaption { padding: 10px 3px 3px; line-height: 1.4; font-size: 12px; font-weight: 800; }
.picture-review-item p { margin: 3px 0; font-size: 12px; color: #924733; }
.memory-picture-review { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
.memory-picture-review .picture-review-images { grid-template-columns: 1fr; }
@media (min-width: 901px) and (max-height: 780px) {
  .picture-session { gap: 12px; }
  .picture-options { max-width: 620px; justify-self: center; }
  .picture-options[data-size="medium"] { max-width: 720px; }
  .picture-options[data-size="large"] { max-width: 1050px; }
  .picture-option { padding: 5px; border-radius: 16px; }
  .picture-option-caption { font-size: 11px; min-height: 27px; }
  .picture-question .picture-card { width: 210px; }
}
@media (max-width: 900px) {
  .picture-session-header { gap: 10px; }
  .picture-memory-page .brain-toolbar { flex-wrap: wrap; }
  .picture-memory-page .brain-stage { padding: 22px 16px; }
  .picture-options, .picture-options[data-size="medium"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .picture-options[data-size="large"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .picture-quiz { grid-template-columns: minmax(130px, 190px) minmax(0, 1fr); gap: 18px; }
  .memory-picture-quiz { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .picture-memory-page .brain-main { padding-top: 24px; }
  .picture-memory-page .brain-toolbar { padding: 12px; }
  .picture-speed-field { min-width: 0; flex-basis: 100%; grid-template-columns: minmax(0, 1fr) auto; }
  .picture-speed-control { grid-column: 1 / -1; grid-row: 2; }
  .picture-speed-field output { grid-column: 2; grid-row: 1; }
  .picture-session-header { width: 100%; }
  .picture-phase { font-size: 10px; padding: 8px 10px; max-width: 44%; text-align: center; }
  .picture-session-header .brain-stat { min-width: 62px; text-align: right; }
  .picture-session-header .brain-stat strong { font-size: 20px; }
  .is-picture-focus .picture-stage { padding: 14px 12px 18px; }
  .picture-session { gap: 14px; }
  .picture-trail { gap: 5px; }
  .picture-trail-step { min-width: 28px; height: 28px; border-radius: 9px; font-size: 11px; }
  .picture-memory-page .association-pair { gap: 8px; grid-template-columns: minmax(0, 1fr) 22px minmax(0, 1fr); }
  .picture-memory-page .association-link { font-size: 24px; }
  .picture-card { padding: 6px; border-radius: 17px; }
  .picture-frame { border-radius: 11px; }
  .picture-card figcaption { font-size: 12px; }
  .picture-learn { gap: 22px; padding-top: 16px; }
  .picture-quiz { grid-template-columns: 1fr; gap: 16px; }
  .picture-question { grid-template-columns: minmax(0, 1fr) 112px; width: 100%; gap: 15px; }
  .picture-question h2 { text-align: left; font-size: 19px; }
  .picture-question .picture-card { width: 112px; }
  .picture-options, .picture-options[data-size="medium"], .picture-options[data-size="large"] { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .memory-picture-quiz .picture-options[data-size="small"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .picture-option { padding: 4px; border-width: 2px; border-radius: 14px; }
  .picture-option-caption { font-size: 10px; gap: 4px; min-height: 32px; padding-top: 5px; }
  .picture-option-badge { flex-basis: 19px; height: 19px; font-size: 10px; border-radius: 6px; }
  .picture-answer-bar { bottom: -18px; padding: 12px; gap: 10px; border-radius: 17px; }
  .picture-feedback { gap: 8px; font-size: 12px; }
  .picture-feedback-icon { flex-basis: 27px; height: 27px; font-size: 20px; }
  .picture-answer-bar .brain-button { min-height: 44px; padding: 0 13px; font-size: 12px; }
  .memory-question h2 { font-size: 20px; }
  .memory-question p { font-size: 12px; }
  .picture-review { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
  .picture-review-item { padding: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  .picture-memory-page *, .picture-memory-page *::before { transition: none !important; }
}