body.memorize-pi-body {
    display: block;
    padding: 0;
    margin: 0;
}

.memorize-pi-header-top {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.65rem 1.25rem;
    margin-bottom: 0.35rem;
}

.memorize-pi-header-top .bc-back {
    margin-bottom: 0;
}

.pi-phase-skip-btn {
    position: absolute;
    top: auto;
    right: 15px;
    bottom: 15px;
    left: auto;
    z-index: 13;
    margin: 0;
    padding: 0.15rem 0.25rem;
    border: none;
    border-radius: 6px;
    background: transparent;
    font: inherit;
    font-size: clamp(0.62rem, 1.5vw, 0.72rem);
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: lowercase;
    color: #8a8a94;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition:
        color 0.15s ease,
        background-color 0.15s ease;
}

.pi-phase-skip-btn:hover,
.pi-phase-skip-btn:focus-visible {
    color: #5c5c64;
    background: rgba(0, 0, 0, 0.05);
}

.pi-phase-skip-btn:focus-visible {
    outline: 2px solid #f8e071;
    outline-offset: 2px;
}

.sorting-break-container.locked-milestone,
.fishing-break-container.locked-milestone,
.eclipse-break-container.locked-milestone {
    display: none !important;
}

#eclipse-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    border: none;
    background-color: #2b2b2b;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 2s ease-in-out;
}

.eclipse-break-container {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    max-width: 500px;
    margin: 0 auto 1.25rem;
    padding: 1.35rem 1.35rem 1.5rem;
    border: 3px solid var(--fg, #111);
    border-radius: 14px;
    background: linear-gradient(
        180deg,
        #e8e4f0 0%,
        #d4cfe0 42%,
        #c4bdd5 100%
    );
    box-shadow: 4px 4px 0 var(--fg, #111);
    text-align: center;
    transition: opacity 0.45s ease;
    -webkit-tap-highlight-color: transparent;
}

.eclipse-break-container__title {
    margin: 0 0 1rem;
    font-size: clamp(0.9rem, 2.2vw, 1.05rem);
    font-weight: 800;
    letter-spacing: 0.02em;
    text-transform: none;
    color: var(--fg, #111);
    line-height: 1.35;
}

.eclipse-break-container__btn {
    margin: 0;
    padding: 0.5rem 1.15rem;
    border: 3px solid var(--fg, #111);
    border-radius: 10px;
    background: #fff;
    box-shadow: 3px 3px 0 var(--fg, #111);
    font: inherit;
    font-size: clamp(0.85rem, 2vw, 0.95rem);
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: lowercase;
    color: var(--fg, #111);
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.eclipse-break-container__btn:hover:not(:disabled),
.eclipse-break-container__btn:focus-visible:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--fg, #111);
}

.eclipse-break-container__btn:focus-visible {
    outline: 2px solid #f8e071;
    outline-offset: 2px;
}

.eclipse-break-container__btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.fishing-break-container {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    max-width: 500px;
    margin: 0 auto 1.25rem;
    padding: 1.35rem 1.35rem 1.5rem;
    border: 3px solid var(--fg, #111);
    border-radius: 14px;
    background: linear-gradient(
        180deg,
        #dbeafe 0%,
        #bfdbfe 42%,
        #93c5fd 100%
    );
    box-shadow: 4px 4px 0 var(--fg, #111);
    text-align: center;
    cursor: pointer;
    transition: opacity 0.45s ease;
    -webkit-tap-highlight-color: transparent;
}

.fishing-break-container--fade-out {
    opacity: 0;
    pointer-events: none;
}

.fishing-break-container__title {
    margin: 0 0 0.85rem;
    font-size: clamp(0.9rem, 2.2vw, 1.05rem);
    font-weight: 800;
    text-transform: lowercase;
    letter-spacing: 0.03em;
    color: var(--fg, #111);
    line-height: 1.35;
}

.fishing-break-container__pond {
    position: relative;
    min-height: 4.25rem;
    margin: 0;
    border-radius: 12px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.35);
    border: 2px solid rgba(17, 17, 17, 0.2);
}

.fish-target {
    position: absolute;
    top: 50%;
    left: 10%;
    width: 2.1rem;
    height: 1.05rem;
    margin-top: -0.525rem;
    border-radius: 50%;
    background: linear-gradient(180deg, #fb923c 0%, #ea580c 100%);
    border: 2px solid rgba(17, 17, 17, 0.55);
    box-shadow: 2px 2px 0 rgba(17, 17, 17, 0.25);
    animation: pi-fish-swim 4.2s ease-in-out infinite alternate;
}

.fish-target.fish-target--caught {
    animation: none;
}

@keyframes pi-fish-swim {
    0% {
        left: 8%;
    }
    100% {
        left: calc(92% - 2.1rem);
    }
}

.sorting-break-container {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    max-width: 500px;
    margin: 0 auto 1.25rem;
    padding: 1.35rem 1.35rem 1.5rem;
    border: 3px solid var(--fg, #111);
    border-radius: 14px;
    background: linear-gradient(
        180deg,
        #fff5eb 0%,
        #ffe8d6 45%,
        #ffd6ba 100%
    );
    box-shadow: 4px 4px 0 var(--fg, #111);
    text-align: center;
    transition: opacity 0.45s ease;
    -webkit-tap-highlight-color: transparent;
}

.sorting-break-container--fade-out {
    opacity: 0;
    pointer-events: none;
}

.sorting-break-container__title {
    margin: 0 0 1rem;
    font-size: clamp(0.9rem, 2.2vw, 1.05rem);
    font-weight: 800;
    letter-spacing: 0.02em;
    text-transform: none;
    color: var(--fg, #111);
    line-height: 1.35;
}

.sorting-break-pots {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: center;
    gap: 1.25rem 1.75rem;
}

.sorting-pot {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex: 0 1 auto;
}

.sorting-pot__label {
    font-size: clamp(0.78rem, 1.9vw, 0.88rem);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #5c534c;
}

.sorting-pot__circle {
    box-sizing: border-box;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    width: min(11.5rem, 100%);
    min-height: 7.5rem;
    padding: 0.65rem;
    border: 3px solid var(--fg, #111);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.55);
    box-shadow: 3px 3px 0 rgba(17, 17, 17, 0.2);
}

.sorting-ball {
    flex-shrink: 0;
    width: 2.1rem;
    height: 2.1rem;
    border-radius: 50%;
    border: 2px solid rgba(17, 17, 17, 0.65);
    box-shadow: 2px 2px 0 rgba(17, 17, 17, 0.35);
    cursor: grab;
    touch-action: none;
}

.sorting-ball:active {
    cursor: grabbing;
}

#trophy-bubble-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 150;
    box-sizing: border-box;
    width: 144px;
    height: 144px;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #000;
    border-radius: 50%;
    background-color: #fff;
    box-shadow: 4px 4px 0 var(--fg, #111);
    color: var(--fg, #111);
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
    -webkit-tap-highlight-color: transparent;
}

#trophy-bubble-btn:hover,
#trophy-bubble-btn:focus-visible {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--fg, #111);
}

#trophy-bubble-btn:focus-visible {
    outline: 2px solid #f8e071;
    outline-offset: 3px;
}

#trophy-bubble-btn.hidden {
    display: none !important;
}

#trophy-bubble-btn svg {
    display: block;
    width: 58%;
    max-width: 96px;
    height: auto;
    flex-shrink: 0;
}

#achievements-modal.achievements-modal {
    position: fixed;
    inset: 0;
    z-index: 220;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    box-sizing: border-box;
}

#achievements-modal.achievements-modal.hidden {
    display: none;
}

.achievements-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    cursor: pointer;
}

.achievements-modal__panel {
    position: relative;
    z-index: 1;
    box-sizing: border-box;
    width: 100%;
    max-width: 440px;
    max-height: min(85vh, 560px);
    overflow-y: auto;
    padding: 1.35rem 1.35rem 1.5rem;
    border: 3px solid var(--fg, #111);
    border-radius: 14px;
    background: #fafafa;
    box-shadow: 8px 8px 0 var(--fg, #111);
    text-align: left;
}

.achievements-modal__close {
    position: absolute;
    top: 0.5rem;
    right: 0.55rem;
    margin: 0;
    padding: 0.2rem 0.45rem;
    border: none;
    background: transparent;
    font: inherit;
    font-size: 1.65rem;
    font-weight: 700;
    line-height: 1;
    color: #888;
    cursor: pointer;
    border-radius: 6px;
}

.achievements-modal__close:hover,
.achievements-modal__close:focus-visible {
    color: var(--fg, #111);
    background: rgba(0, 0, 0, 0.06);
}

.achievements-modal__close:focus-visible {
    outline: 2px solid #f8e071;
    outline-offset: 2px;
}

.achievements-modal__title {
    margin: 0 2rem 1rem 0;
    padding-bottom: 0.65rem;
    border-bottom: 2px solid var(--fg, #111);
    font-size: clamp(1.05rem, 3vw, 1.35rem);
    font-weight: 900;
    text-transform: lowercase;
    letter-spacing: 0.03em;
    color: var(--fg, #111);
}

.achievements-modal__list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
}

.pi-achievement-item {
    position: relative;
    box-sizing: border-box;
    aspect-ratio: 1;
    width: 100%;
    margin: 0;
    padding: 0.5rem;
    border: 3px solid var(--fg, #111);
    border-radius: 14px;
    background: #fff;
    box-shadow: 3px 3px 0 var(--fg, #111);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.pi-achievement-item:hover {
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0 var(--fg, #111);
}

.pi-achievement-item__title {
    position: relative;
    z-index: 0;
    margin: 0;
    padding: 0.2rem;
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: lowercase;
    letter-spacing: 0.02em;
    color: var(--fg, #111);
    line-height: 1.2;
    hyphens: auto;
    overflow-wrap: anywhere;
}

.pi-achievement-item__tooltip {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    box-sizing: border-box;
    border-radius: 11px;
    background: rgba(17, 17, 17, 0.94);
    color: #fff;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}

.pi-achievement-item:hover .pi-achievement-item__tooltip {
    opacity: 1;
    pointer-events: auto;
}

.pi-achievement-item:focus-within .pi-achievement-item__tooltip {
    opacity: 1;
    pointer-events: auto;
}

.pi-achievement-item__desc {
    margin: 0;
    font-size: 0.68rem;
    font-weight: 600;
    line-height: 1.35;
    color: #f3f3f3;
    text-align: center;
    overflow-wrap: anywhere;
}

.memorize-pi-page {
    box-sizing: border-box;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem 2.5rem;
    text-align: center;
    overflow: visible;
}

.memorize-pi-section--practice {
    overflow: visible !important;
}

#toast-container.pi-toast-container {
    position: fixed;
    right: 16px;
    bottom: 120px;
    z-index: 300;
    display: flex;
    flex-direction: column-reverse;
    align-items: flex-end;
    gap: 10px;
    max-width: min(340px, calc(100vw - 32px));
    pointer-events: none;
}

.pi-toast,
.pi-toast * {
    pointer-events: none;
}

.pi-toast {
    box-sizing: border-box;
    margin: 0;
    padding: 0.75rem 1rem;
    border: 3px solid #22c55e;
    border-radius: 12px;
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    box-shadow:
        4px 4px 0 #111,
        0 8px 24px rgba(34, 197, 94, 0.25);
    color: #111;
    opacity: 0;
    transform: translateY(16px);
    animation: pi-toast-enter 0.38s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.pi-toast__title {
    margin: 0 0 0.25rem;
    font-size: 0.82rem;
    font-weight: 900;
    text-transform: lowercase;
    letter-spacing: 0.02em;
    line-height: 1.2;
    color: #14532d;
}

.pi-toast__desc {
    margin: 0;
    font-size: 0.72rem;
    font-weight: 600;
    line-height: 1.35;
    color: #166534;
}

.pi-toast--leave {
    animation: pi-toast-exit 0.4s ease forwards;
}

@keyframes pi-toast-enter {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pi-toast-exit {
    to {
        opacity: 0;
        transform: translateY(8px);
    }
}

.memorize-pi-section {
    margin-bottom: 2rem;
    padding: 0.5rem 0;
    border: none;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.memorize-pi-section h2 {
    margin: 0 0 0.85rem;
    font-size: clamp(1.15rem, 2.8vw, 1.45rem);
    font-weight: 900;
    text-transform: lowercase;
    letter-spacing: 0.02em;
}

.pi-subsection-heading {
    margin: 0 0 0.75rem;
    font-size: clamp(1rem, 2.4vw, 1.15rem);
    font-weight: 800;
    text-transform: lowercase;
    letter-spacing: 0.02em;
}

#main-grid-heading {
    margin-top: 1.35rem;
}

.chunking-container {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: flex-start;
    justify-content: center;
    gap: 20px;
    width: 100%;
    overflow: hidden;
    box-sizing: border-box;
    padding-bottom: 15px;
    padding-right: 10px;
}

.chunking-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0.45rem;
    flex: 0 1 auto;
    min-width: 0;
}

.chunking-ref {
    margin: 0;
    padding: 0;
    width: auto;
    max-width: 100%;
    text-align: center;
    font: inherit;
    font-size: clamp(0.95rem, 2.3vw, 1.12rem);
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.14em;
    line-height: 1.25;
    color: var(--fg);
    word-break: break-all;
}

.chunking-container .chunking-input {
    box-sizing: content-box;
    margin: 0;
    padding: 0.5rem 0.85rem;
    min-width: 4ch;
    width: auto !important;
    max-width: 6ch;
    border: 3px solid var(--fg);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 3px 3px 0 var(--fg);
    font: inherit;
    font-size: clamp(0.88rem, 2vw, 1rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    text-align: center;
    color: var(--fg);
    flex-shrink: 0;
    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.chunking-input:focus {
    outline: none;
    box-shadow: 3px 3px 0 var(--fg), 0 0 0 2px #f8e071;
}

.ghosting-input {
    width: 100%;
    max-width: 19ch;
    margin: 0;
    padding: 0.55rem 0.65rem;
    border: 3px solid var(--fg);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 3px 3px 0 var(--fg);
    font: inherit;
    font-size: clamp(0.95rem, 2.2vw, 1.05rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.06em;
    text-align: left;
    color: var(--fg);
    transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.ghosting-input::placeholder {
    color: #b0b0b8;
    opacity: 1;
    font-weight: 600;
    letter-spacing: 0.08em;
}

.ghosting-input:focus {
    outline: none;
    box-shadow: 3px 3px 0 var(--fg), 0 0 0 2px #f8e071;
}

.pi-ghost-stage-wrap {
    position: relative;
    width: 100%;
    max-width: 19ch;
    margin: 0;
    align-self: flex-start;
    z-index: 0;
}

.pi-ghost-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    box-sizing: border-box;
    margin: 0;
    padding: 0.55rem 0.65rem;
    border: 3px solid var(--fg);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 3px 3px 0 var(--fg);
    font: inherit;
    font-size: clamp(0.95rem, 2.2vw, 1.05rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.06em;
    text-align: left;
    line-height: 1.35;
    word-break: break-all;
    pointer-events: none;
    user-select: none;
    overflow: hidden;
}

.pi-ghost-layer .pi-ghost-typed {
    color: #000;
}

.pi-ghost-layer .pi-ghost-rest {
    color: #c8c8d0;
}

.pi-ghost-input-overlay {
    position: relative;
    z-index: 2;
    display: block;
    box-sizing: border-box;
    width: 100%;
    min-height: 2.85rem;
    margin: 0;
    padding: 0.55rem 0.65rem;
    border: 3px solid transparent;
    border-radius: 10px;
    background: transparent;
    box-shadow: none;
    font: inherit;
    font-size: clamp(0.95rem, 2.2vw, 1.05rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.06em;
    text-align: left;
    line-height: 1.35;
    color: transparent;
    caret-color: var(--fg);
    outline: none;
    resize: none;
}

.pi-ghost-input-overlay:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px #f8e071;
    border-radius: 10px;
}

.pi-stage-host {
    width: 100%;
    min-height: 2.75rem;
}

.milestone-container.pi-practice-card {
    max-width: 540px;
    border-color: #6b5b95;
    background: linear-gradient(180deg, #faf8ff 0%, #f3f0fa 100%);
    box-shadow: 4px 4px 0 #6b5b95;
}

.milestone-container.active-box {
    box-shadow: 6px 6px 0 #6b5b95, 0 8px 24px rgba(107, 91, 149, 0.18);
}

.milestone-container .pi-practice-card__label {
    color: #4a3f6b;
}

.milestone-container.locked-milestone {
    display: none !important;
}

.pi-practice-card[data-pi-learning-stage="1"] .target-digits,
.pi-practice-card[data-pi-learning-stage="2"] .target-digits,
.milestone-container[data-pi-learning-stage="1"] .target-digits,
.milestone-container[data-pi-learning-stage="2"] .target-digits {
    display: none !important;
}

.pi-diagnostic-prompt {
    margin: 0 0 1rem;
    font-size: clamp(0.95rem, 2.2vw, 1.05rem);
    line-height: 1.4;
    font-weight: 700;
}

.practice-instructions {
    margin: 0 0 1.1rem;
    font-size: clamp(0.8rem, 2vw, 0.92rem);
    line-height: 1.45;
    font-weight: 600;
    color: var(--fg);
    opacity: 0.88;
    text-align: center;
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

.pi-warmup-section {
    background: #fff;
}

.pi-warmup-encouragement {
    margin: 0 auto 1.15rem;
    max-width: none;
    padding: 0 0.5rem;
    font-size: clamp(0.85rem, 2.1vw, 0.98rem);
    line-height: 1.55;
    font-weight: 500;
    color: #5c5c62;
    text-align: center;
    letter-spacing: 0.01em;
    white-space: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.pi-study-grid {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
    overflow: visible;
}

.pi-warmup-grid.pi-warmup-grid--beginner-layout {
    gap: 2.75rem;
}

.pi-warmup-grid.pi-warmup-grid--beginner-layout .warm-up-container {
    max-width: 100%;
    padding: 1.35rem 0 2rem;
}

.pi-warmup-grid .warm-up-container__digits,
.pi-warmup-grid .warm-up-container .target-digits {
    font-size: 2.5rem;
    line-height: 1.25;
    letter-spacing: 0.12em;
}

.pi-warmup-grid .warm-up-container .pi-mini-input {
    font-size: 2.5rem;
    line-height: 1.15;
    padding: 0.4em 0.45em;
    min-height: calc(2.5rem * 1.15 + 0.8em);
    box-sizing: border-box;
    border-radius: 12px;
}

.warm-up-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0.7rem;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    padding: 0.65rem 0;
    border: none;
    background: none;
    box-shadow: none;
    text-align: center;
    overflow: visible;
}

.warm-up-container__label {
    margin: 0;
    width: 100%;
    font-size: clamp(0.78rem, 2vw, 0.9rem);
    font-weight: 700;
    text-transform: lowercase;
    letter-spacing: 0.03em;
    color: #6b6b72;
    text-align: center;
}

.warm-up-container__digits,
.warm-up-container .target-digits {
    margin: 0;
    width: 100%;
    font-variant-numeric: tabular-nums;
    font-size: clamp(0.95rem, 2.3vw, 1.1rem);
    font-weight: 800;
    letter-spacing: 0.1em;
    line-height: 1.4;
    word-break: break-all;
    color: #3d3d42;
    text-align: center;
    transition: opacity 0.2s ease-in-out;
}

.warm-up-container .pi-practice-input-row {
    justify-content: center;
    width: 100%;
}

.warm-up-container input {
    width: auto !important;
    max-width: fit-content !important;
    margin: 0 auto;
    text-align: center;
}

.warm-up-container .pi-mini-input {
    flex: 0 0 auto;
    box-sizing: content-box;
    min-width: 0;
    max-width: none;
    margin: 0 auto;
    padding: 0.35rem 0.4rem;
    border: 3px solid var(--fg);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 3px 3px 0 var(--fg);
    text-align: center;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--fg);
    transition:
        border-color 0.2s ease,
        background-color 0.2s ease,
        box-shadow 0.15s ease;
}

.warm-up-container .pi-mini-input:focus {
    outline: none;
    box-shadow: 3px 3px 0 var(--fg), 0 0 0 2px #f8e071;
    border-color: var(--fg);
}

.warm-up-container .pi-mini-input.pi-mini--complete {
    background: rgba(220, 252, 231, 0.85);
    border-color: #166534;
    box-shadow: 3px 3px 0 #14532d;
}

.warm-up-container .pi-mini-input.pi-input--error {
    animation: pi-warmup-mini-error 0.45s ease;
}

@keyframes pi-warmup-mini-error {
    0%,
    100% {
        border-color: var(--fg);
        background: #ffffff;
        box-shadow: 3px 3px 0 var(--fg);
    }
    25%,
    75% {
        border-color: #c00;
        background: rgba(255, 228, 228, 0.55);
        box-shadow: 3px 3px 0 #c00;
    }
}

.pi-personal-best {
    position: absolute;
    right: 0.55rem;
    bottom: 0.45rem;
    z-index: 9;
    margin: 0;
    max-width: calc(100% - 5rem);
    padding: 0;
    font-size: 0.68rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
    line-height: 1.2;
    color: #7a7a82;
    text-align: right;
    pointer-events: none;
}

.pi-practice-card {
    position: relative;
    overflow: visible !important;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    width: 100%;
    max-width: 500px;
    margin: 0 auto 30px;
    padding: 1.35rem 3rem 1.25rem 1.35rem;
    border: 3px solid var(--fg);
    border-radius: 14px;
    background: #fafafa;
    box-shadow: 4px 4px 0 var(--fg);
    text-align: left;
    transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.pi-practice-card.active-box {
    transform: scale(1.05);
    box-shadow: 6px 6px 0 var(--fg), 0 8px 24px rgba(0, 0, 0, 0.12);
}

.pi-practice-card__label {
    margin: 0;
    font-size: clamp(0.8rem, 2vw, 0.95rem);
    font-weight: 800;
    text-transform: lowercase;
    letter-spacing: 0.04em;
    color: var(--fg);
    opacity: 0.9;
}

.pi-practice-card__digits,
.pi-practice-card .target-digits {
    margin: 0;
    font-variant-numeric: tabular-nums;
    font-size: clamp(1rem, 2.4vw, 1.2rem);
    font-weight: 900;
    letter-spacing: 0.12em;
    line-height: 1.35;
    word-break: break-all;
    color: var(--fg);
    transition: opacity 0.2s ease-in-out;
}

.pi-practice-card.is-mastered::after {
    content: "✓";
    position: absolute;
    inset: -3px;
    width: auto;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #4caf50;
    border: 3px solid #000;
    color: #ffffff;
    font-size: 4rem;
    font-weight: 900;
    line-height: 1;
    z-index: 20;
    border-radius: inherit;
    box-sizing: border-box;
    pointer-events: auto;
    cursor: pointer;
}

.pi-practice-card.is-mastered .pi-mastered-overlay-best {
    position: absolute;
    left: 50%;
    bottom: 0.55rem;
    transform: translateX(-50%);
    z-index: 21;
    margin: 0;
    padding: 0 0.35rem;
    max-width: calc(100% - 1rem);
    font-size: clamp(0.62rem, 1.65vw, 0.72rem);
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
    line-height: 1.25;
    color: #ffffff;
    text-align: center;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
    pointer-events: none;
}

#final-joke-container {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 500px;
    margin: 1.5rem auto 0;
}

.pi-practice-input-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
    width: 100%;
}

.pi-card-with-seam-wrap {
    position: relative;
    overflow: visible !important;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: center;
    gap: 0.85rem 1rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.pi-card-with-seam-wrap > .pi-practice-card,
.pi-card-with-seam-wrap > .warm-up-container {
    flex: 0 1 auto;
    min-width: 0;
}

.pi-card-with-seam-wrap > .pi-repair-external-slot {
    flex: 0 0 0;
    width: 0;
    min-width: 0;
    overflow: visible;
    align-self: flex-start;
}

.pi-repair-external-slot {
    display: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    position: static;
    z-index: 25;
    box-sizing: border-box;
    width: auto;
    min-width: 0;
    max-width: none;
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    box-shadow: none;
}

.seam-wrapper {
    position: absolute;
    right: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: stretch;
    width: max-content;
    max-width: min(100%, 12.5rem);
    z-index: 26;
}

.seam-card {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0.55rem;
    padding: 0.75rem 0.85rem;
    border: 3px solid var(--fg, #111);
    border-radius: 12px;
    background: #fffef7;
    box-shadow: 4px 4px 0 var(--fg, #111);
}

.seam-card__target {
    margin: 0;
    padding: 0;
    font: inherit;
    font-size: clamp(1rem, 2.4vw, 1.15rem);
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.18em;
    line-height: 1.25;
    color: var(--fg, #111);
    text-align: center;
}

.seam-card__input {
    box-sizing: border-box;
    display: block;
    width: auto;
    min-width: 5.5ch;
    max-width: 8ch;
    margin: 0;
    padding: 0.45rem 0.55rem;
    border: 3px solid var(--fg, #111);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 3px 3px 0 var(--fg, #111);
    font: inherit;
    font-size: clamp(0.9rem, 2.1vw, 1.05rem);
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.1em;
    text-align: center;
    color: var(--fg, #111);
    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.seam-card__input:focus {
    outline: none;
    box-shadow: 3px 3px 0 var(--fg, #111), 0 0 0 2px #f8e071;
}

.seam-card__input:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.repair-bubble {
    box-sizing: border-box;
    width: 3.2ch;
    min-width: 2.75rem;
    margin: 0;
    padding: 0.5rem 0.45rem;
    border: 3px solid var(--fg);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 3px 3px 0 var(--fg);
    font: inherit;
    font-size: clamp(0.95rem, 2.2vw, 1.05rem);
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    text-align: center;
    color: var(--fg);
    transition:
        border-color 0.15s ease,
        background-color 0.15s ease,
        box-shadow 0.15s ease;
}

.repair-bubble:focus {
    outline: none;
    box-shadow: 3px 3px 0 var(--fg), 0 0 0 2px #f8e071;
    background: #ffffff;
}

.repair-bubble:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #f3f3f3;
}

.pi-practice-input-row .pi-mini-input {
    flex: 1 1 140px;
    min-width: 0;
}

.pi-practice-card.is-mastered .pi-mastery-checkbox-wrap {
    z-index: 8;
}

.pi-mastery-checkbox-wrap {
    position: absolute;
    top: 0.65rem;
    right: 0.65rem;
    z-index: 11;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin: 0;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.pi-mastery-checkbox-wrap--labeled {
    font-size: clamp(0.72rem, 1.8vw, 0.85rem);
    font-weight: 800;
    text-transform: lowercase;
    letter-spacing: 0.03em;
    color: var(--fg);
}

.pi-mastery-checkbox-wrap__text {
    flex-shrink: 0;
    user-select: none;
}

.pi-mastery-checkbox {
    flex-shrink: 0;
    width: 1.35rem;
    height: 1.35rem;
    margin: 0;
    appearance: none;
    border: 3px solid var(--fg);
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 2px 2px 0 var(--fg);
    cursor: pointer;
    transition:
        background-color 0.15s ease,
        border-color 0.15s ease,
        box-shadow 0.1s ease,
        transform 0.1s ease;
}

.pi-mastery-checkbox:hover {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 var(--fg);
}

.pi-mastery-checkbox:checked {
    background: #166534;
    border-color: #14532d;
    box-shadow:
        2px 2px 0 var(--fg),
        inset 0 0 0 2px rgba(255, 255, 255, 0.92);
}

.pi-mastery-checkbox:focus-visible {
    outline: 2px solid #f8e071;
    outline-offset: 2px;
}

.pi-practice-card.is-mastered .pi-mini-input {
    pointer-events: none;
}

.pi-mini-input {
    width: 100%;
    margin: 0;
    padding: 0.55rem 0.65rem;
    border: 3px solid var(--fg);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 3px 3px 0 var(--fg);
    font: inherit;
    font-size: clamp(0.95rem, 2.2vw, 1.05rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.08em;
    color: var(--fg);
    transition:
        box-shadow 0.15s ease,
        border-color 0.15s ease,
        background-color 0.2s ease;
}

.pi-mini-input:focus {
    outline: none;
    box-shadow: 3px 3px 0 var(--fg), 0 0 0 2px #f8e071;
}

.pi-mini-input.pi-mini--complete {
    background-color: #dcfce7;
    border-color: #166534;
}

.pi-mini-input.pi-input--error {
    animation: pi-input-flash 0.45s ease;
}

.pi-test-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
    max-width: 100%;
    margin: 0 auto 0.75rem;
}

.pi-test-prefix {
    flex-shrink: 0;
    font-size: clamp(1.05rem, 2.6vw, 1.35rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.06em;
    color: var(--fg);
    line-height: 1.2;
}

.pi-test-row .pi-test-input {
    flex: 1 1 auto;
    min-width: 0;
    width: auto;
    margin: 0;
}

.memorize-pi-section--diagnostic .pi-test-row .pi-test-input {
    flex: 0 0 auto;
    width: 6ch;
    min-width: 80px;
    max-width: 100%;
    box-sizing: content-box;
    transition:
        width 0.2s ease-out,
        box-shadow 0.15s ease,
        border-color 0.15s ease;
}

.pi-test-input {
    display: block;
    width: 100%;
    padding: 0.85rem 1rem;
    border: 3px solid var(--fg);
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 4px 4px 0 var(--fg);
    font: inherit;
    font-size: clamp(1.05rem, 2.6vw, 1.35rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.06em;
    color: var(--fg);
    transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.pi-test-input:focus {
    outline: none;
    box-shadow: 4px 4px 0 var(--fg), 0 0 0 2px #f8e071;
}

.pi-test-input:disabled {
    opacity: 0.85;
    cursor: not-allowed;
    box-shadow: 3px 3px 0 var(--fg);
}

.pi-test-input.pi-input--error {
    animation: pi-input-flash 0.45s ease;
}

@keyframes pi-input-flash {
    0%,
    100% {
        border-color: var(--fg);
        background: #ffffff;
    }
    25%,
    75% {
        border-color: #c00;
        background: #ffe4e4;
    }
}

.pi-progress {
    margin: 0;
    font-size: clamp(1rem, 2.4vw, 1.2rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.pi-reset-wrap {
    margin: 1.75rem 0 0;
    padding: 0;
    text-align: center;
}

#reset-progress-btn {
    margin: 0;
    padding: 0;
    border: none;
    background: none;
    font: inherit;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: #888;
    cursor: pointer;
    text-decoration: none;
}

#reset-progress-btn:hover,
#reset-progress-btn:focus-visible {
    color: #666;
    text-decoration: underline;
}

#reset-progress-btn:focus-visible {
    outline: 2px solid #f8e071;
    outline-offset: 2px;
}

.pi-win-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.72);
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition:
        opacity 0.35s ease,
        visibility 0.35s ease;
}

.pi-win-overlay.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    cursor: pointer;
}

.pi-win-title {
    position: relative;
    z-index: 201;
    margin: 0;
    padding: 1rem 1.35rem;
    font-size: clamp(1.75rem, 6vw, 3.25rem);
    font-weight: 900;
    text-align: center;
    line-height: 1.1;
    text-transform: lowercase;
    color: var(--fg);
    background: #fff;
    border: 4px solid var(--fg);
    border-radius: 18px;
    box-shadow: 8px 8px 0 var(--fg);
}

.pi-confetti-layer {
    position: fixed;
    inset: 0;
    z-index: 199;
    pointer-events: none;
    overflow: hidden;
}

.pi-confetti-piece {
    position: absolute;
    top: -12px;
    width: 10px;
    height: 14px;
    border: 2px solid var(--fg);
    border-radius: 2px;
    opacity: 0.95;
    animation: pi-confetti-fall linear forwards;
}

@keyframes pi-confetti-fall {
    0% {
        transform: translateY(0) rotateZ(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(110vh) rotateZ(720deg);
        opacity: 0.85;
    }
}

.memorize-pi-page .visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}