:root {
    color-scheme: dark;
    --sf-bg: #151615;
    --sf-panel: rgba(20, 21, 20, 0.9);
    --sf-line: rgba(255, 255, 255, 0.13);
    --sf-text: #f7f3e8;
    --sf-muted: #b9b3a7;
    --sf-green: #6ed28a;
    --sf-gold: #f0c75e;
    --sf-orange: #e97849;
    --sf-blue: #6ca6d9;
}

* {
    box-sizing: border-box;
}

body.scramblefall-page {
    margin: 0;
    min-height: var(--sf-viewport-height, 100vh);
    overflow-x: hidden;
    overflow-y: auto;
    background:
        radial-gradient(circle at 18% 0%, rgba(240, 199, 94, 0.14), transparent 28rem),
        linear-gradient(140deg, #151615 0%, #20251f 54%, #11151a 100%);
    color: var(--sf-text);
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.scramblefall-shell {
    width: min(94vw, 36rem);
    min-height: var(--sf-viewport-height, 100vh);
    margin: 0 auto;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    overflow: visible;
}

.scramblefall-header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
}

.scramblefall-header h1 {
    margin: 0;
    font-size: clamp(2rem, 10vw, 3.7rem);
    line-height: 0.95;
    letter-spacing: 0;
}

.scramblefall-score {
    padding-bottom: 0.25rem;
    color: var(--sf-muted);
    font-weight: 700;
    text-transform: uppercase;
}

.scramblefall-music-control {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding-bottom: 0.25rem;
    color: var(--sf-muted);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    white-space: nowrap;
}

.scramblefall-music-control input {
    width: 1rem;
    height: 1rem;
    margin: 0;
    accent-color: var(--sf-gold);
}

.scramblefall-score strong {
    color: var(--sf-green);
    font-size: 1.55rem;
}

.scramblefall-board-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
    min-height: 0;
}

.scramblefall-board {
    position: relative;
    overflow: hidden;
    width: min(100%, var(--sf-board-size, 36rem));
    aspect-ratio: 1 / 1;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.07), transparent 28%),
        #1d211f;
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.34);
}

.scramblefall-grid {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-rows: repeat(13, 1fr);
}

.scramblefall-grid div {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.scramblefall-grid .scramblefall-extension-row {
    background: rgba(108, 166, 217, 0.07);
    border-top-color: rgba(108, 166, 217, 0.18);
}

.scramblefall-grid .scramblefall-extension-row:nth-child(3) {
    border-bottom: 1px solid rgba(240, 199, 94, 0.55);
}

.scramblefall-stack,
.scramblefall-effects {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.scramblefall-row {
    position: absolute;
    top: var(--sf-y);
    left: 7%;
    right: 7%;
    height: 6.45%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: min(0.95vw, 0.32rem);
    transform: none;
    transition: transform 170ms ease, opacity 170ms ease;
}

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

.scramblefall-row.is-falling {
    filter: drop-shadow(0 0.4rem 0.7rem rgba(240, 199, 94, 0.18));
}

.scramblefall-row.is-solved {
    opacity: 0;
    transform: scale(1.08);
}

.scramblefall-letter {
    width: min(10.2%, 2.15rem);
    height: auto;
    aspect-ratio: 1 / 1;
    display: grid;
    place-items: center;
    border-radius: 5px;
    background: #f7f3e8;
    color: #171916;
    font-weight: 900;
    font-size: clamp(0.9rem, 4.7vw, 1.55rem);
    line-height: 1;
    box-shadow: inset 0 -0.18rem 0 rgba(0, 0, 0, 0.18);
    transform-style: preserve-3d;
}

.scramblefall-letter.is-answer {
    background: #f0c75e;
    color: #171916;
}

.scramblefall-overlay {
    position: absolute;
    inset: 0;
    z-index: 4;
    display: grid;
    place-items: center;
    padding: 1rem;
    background: rgba(16, 17, 16, 0.58);
    backdrop-filter: blur(3px);
}

.scramblefall-overlay[hidden] {
    display: none;
}

.scramblefall-panel {
    width: min(88%, 22rem);
    min-height: 12rem;
    padding: 1.2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: var(--sf-panel);
    display: grid;
    gap: 1rem;
    align-content: center;
}

.scramblefall-game-over-panel {
    position: absolute;
    z-index: 5;
    inset: 0 0 auto;
    height: 23.08%;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 0.8rem;
    padding: 0.35rem 7%;
    border-bottom: 1px solid rgba(240, 199, 94, 0.55);
    background: rgba(20, 21, 20, 0.88);
    backdrop-filter: blur(3px);
}

.scramblefall-game-over-panel[hidden] {
    display: none;
}

.scramblefall-game-over-panel h2 {
    margin: 0;
    font-size: clamp(1.35rem, 4vw, 1.7rem);
    white-space: nowrap;
}

.scramblefall-duration {
    margin-top: 0.1rem;
    color: var(--sf-muted);
    font-size: 0.9rem;
    font-weight: 800;
}

.scramblefall-game-over-panel .scramblefall-actions {
    width: min(100%, 15rem);
}

.scramblefall-form[hidden] {
    display: none;
}

.scramblefall-game-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
}

.scramblefall-game-controls[hidden] {
    display: none;
}

.scramblefall-panel label {
    display: grid;
    gap: 0.4rem;
    color: var(--sf-muted);
    font-weight: 800;
    text-transform: uppercase;
}

.scramblefall-panel select,
.scramblefall-form input {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    background: #f7f3e8;
    color: #171916;
    font: inherit;
}

.scramblefall-panel select {
    padding: 0.7rem;
}

.scramblefall-panel h2,
.scramblefall-panel p {
    margin: 0;
    text-align: center;
}

.scramblefall-panel h2 {
    font-size: 2rem;
}

.scramblefall-panel p {
    color: var(--sf-muted);
    font-size: 1.2rem;
}

.scramblefall-extra {
    min-height: 2rem;
    color: var(--sf-muted);
    font-size: 0.95rem;
}

button {
    min-height: 2.9rem;
    border: 0;
    border-radius: 6px;
    background: var(--sf-gold);
    color: #171916;
    font: inherit;
    font-weight: 900;
    cursor: pointer;
}

button:disabled,
input:disabled {
    cursor: not-allowed;
    opacity: 0.58;
}

.scramblefall-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
}

.scramblefall-actions button:last-child,
.scramblefall-form button {
    background: var(--sf-blue);
}

.scramblefall-form {
    display: grid;
    grid-template-columns: 1fr 6.5rem;
    gap: 0.55rem;
}

.scramblefall-form input {
    min-height: 3rem;
    padding: 0.2rem 0.85rem;
    font-size: 1.25rem;
    font-weight: 800;
    text-transform: uppercase;
}

.scramblefall-message {
    min-height: 1.4rem;
    color: var(--sf-muted);
    text-align: center;
    font-weight: 700;
}

.scramblefall-solved-words {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    padding: 0.2rem 0 1rem;
}

.scramblefall-solved-word {
    width: 86%;
    display: flex;
    justify-content: center;
    gap: min(0.95vw, 0.32rem);
}

.scramblefall-footer {
    padding: 0.2rem 0 1rem;
    color: rgba(247, 243, 232, 0.48);
    font-size: 0.78rem;
    text-align: center;
}

.scramblefall-footer a {
    color: inherit;
}

.scramblefall-message.is-good {
    color: var(--sf-green);
}

.scramblefall-message.is-bad {
    color: var(--sf-orange);
}

.scramblefall-pop {
    position: absolute;
    width: var(--sf-size);
    height: var(--sf-length);
    left: var(--sf-x);
    top: var(--sf-y);
    border-radius: 999px;
    background: var(--sf-color);
    animation: scramblefall-pop var(--sf-duration) linear var(--sf-delay) forwards;
    transform: translate(-50%, -50%) rotate(var(--sf-angle));
    transform-origin: center;
}

.scramblefall-burst {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.scramblefall-flying-letter {
    position: absolute;
    display: grid;
    place-items: center;
    border-radius: 5px;
    background: #f7f3e8;
    color: #171916;
    font-weight: 900;
    font-size: clamp(0.9rem, 4.7vw, 1.55rem);
    line-height: 1;
    pointer-events: none;
    transform-origin: center;
    will-change: transform, opacity;
}

.scramblefall-pop.is-fragment {
    border-radius: 2px;
}

@keyframes scramblefall-pop {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) rotate(var(--sf-angle));
    }

    75% {
        opacity: 1;
    }

    to {
        opacity: 0;
        transform: translate(calc(-50% + var(--sf-dx)), calc(-50% + var(--sf-dy))) rotate(var(--sf-angle));
    }
}

@media (prefers-reduced-motion: reduce) {
    .scramblefall-pop {
        animation-duration: 1ms;
        animation-delay: 0ms;
    }
}


@media (max-width: 26rem) {
    .scramblefall-shell {
        width: 100vw;
        padding: 0.5rem;
        gap: 0.45rem;
    }

    .scramblefall-form {
        grid-template-columns: 1fr 5.4rem;
    }

    .scramblefall-game-over-panel {
        grid-template-columns: 1fr;
        gap: 0.2rem;
        padding-left: 5%;
        padding-right: 5%;
    }

    .scramblefall-game-over-panel .scramblefall-actions {
        width: 100%;
    }
}

body.scramblefall-keyboard-open .scramblefall-header h1 {
    font-size: clamp(1.65rem, 8vw, 2.6rem);
}

body.scramblefall-keyboard-open .scramblefall-score strong {
    font-size: 1.25rem;
}

body.scramblefall-keyboard-open .scramblefall-message {
    min-height: 1rem;
    font-size: 0.9rem;
}