.river-game {
    --river-panel: #0c110e;
    --river-panel-raised: #121a15;
    --river-border: rgba(229, 240, 226, 0.2);
    --river-text: #f5f2e8;
    --river-muted: #9fa9a0;
    --river-green: #c7ff38;
    --river-blue: #85dcff;
    --river-red: #ff6f5e;
    overflow: hidden;
    border: 1px solid #58645b;
    background: var(--river-panel);
    color: var(--river-text);
    box-shadow: 12px 12px 0 #152d26;
}

.river-game button {
    font: inherit;
    color: inherit;
}

.river-game-header {
    display: grid;
    min-height: 52px;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    border-bottom: 1px solid var(--river-border);
    background: #090d0b;
    font: 500 0.61rem/1 var(--mono);
    letter-spacing: 0.08em;
}

.river-game-header span,
.river-game-header strong,
.river-game-header i {
    padding: 0 18px;
}

.river-game-header span {
    color: var(--river-green);
}

.river-game-header strong {
    color: #ccd3cc;
    font-weight: 400;
}

.river-game-header i {
    color: var(--river-blue);
    font-style: normal;
}

.river-game-body {
    display: grid;
    grid-template-columns: minmax(330px, 0.68fr) minmax(600px, 1.32fr);
}

.river-editor-panel,
.river-world-panel {
    min-width: 0;
}

.river-editor-panel {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--river-border);
    background:
        radial-gradient(circle at 0 100%, rgba(102, 115, 255, 0.12), transparent 42%),
        var(--river-panel);
}

.river-panel-label {
    display: flex;
    min-height: 44px;
    align-items: center;
    justify-content: space-between;
    padding: 0 17px;
    border-bottom: 1px solid var(--river-border);
    color: var(--river-muted);
    font: 500 0.56rem/1 var(--mono);
    letter-spacing: 0.09em;
}

.river-panel-label small {
    color: #667068;
    font: inherit;
    letter-spacing: 0;
}

.river-editor-shell {
    --river-source-font-size: 0.76rem;
    --river-source-line-step: 1.482rem;
    --river-source-padding-x: 28px;
    --river-source-padding-y: 34px;
    --river-source-scroll-y: 0px;
    position: relative;
    min-height: 385px;
    flex: 1;
    overflow: hidden;
    cursor: text;
}

.river-source,
.river-source-highlight,
.river-source-playback,
.river-source-diagnostics {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    margin: 0;
    overflow: auto;
    padding: var(--river-source-padding-y) var(--river-source-padding-x);
    border: 0;
    outline: 0;
    font: 400 var(--river-source-font-size)/1.95 var(--mono);
    font-variant-ligatures: none;
    letter-spacing: normal;
    tab-size: 4;
    white-space: pre;
}

.river-source {
    z-index: 4;
    resize: none;
    background: transparent;
    color: transparent;
    caret-color: var(--river-green);
    -webkit-text-fill-color: transparent;
}

.river-source-highlight {
    z-index: 1;
    color: #dde5dd;
    pointer-events: none;
    scrollbar-width: none;
}

.river-source-highlight::-webkit-scrollbar,
.river-source-playback::-webkit-scrollbar,
.river-source-diagnostics::-webkit-scrollbar {
    display: none;
}

.river-source-highlight code,
.river-source-playback code,
.river-source-diagnostics code {
    display: block;
    min-width: max-content;
    margin: 0;
    padding: 0;
    font: inherit;
}

.river-source-playback {
    z-index: 2;
    color: transparent;
    pointer-events: none;
    scrollbar-width: none;
}

.river-source-playback [data-river-call-range] {
    border-radius: 4px;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

.river-source-playback [data-river-call-state="active"] {
    background: rgba(199, 255, 56, 0.2);
    box-shadow: 0 0 12px rgba(199, 255, 56, 0.2);
}

.river-source-playback [data-river-call-state="error"] {
    background: rgba(255, 91, 76, 0.3);
    box-shadow: 0 0 14px rgba(255, 80, 65, 0.34);
}

.river-source-diagnostics {
    z-index: 3;
    color: transparent;
    pointer-events: none;
    scrollbar-width: none;
}

.river-source-diagnostics [data-river-diagnostic-range] {
    text-decoration-line: underline;
    text-decoration-style: wavy;
    text-decoration-color: #ff655f;
    text-decoration-thickness: 1.5px;
    text-underline-offset: 3px;
    text-decoration-skip-ink: none;
}

.river-source-diagnostics [data-river-diagnostic-range].is-empty {
    display: inline-block;
    width: 0.7em;
}

.river-source:focus {
    box-shadow: inset 0 0 0 1px var(--river-blue);
}

.river-source::selection {
    background: rgba(133, 220, 255, 0.3);
}

.river-completions {
    position: absolute;
    z-index: 6;
    top: 0;
    left: 0;
    width: min(290px, calc(100% - 16px));
    max-height: 230px;
    overflow: auto;
    border: 1px solid rgba(133, 220, 255, 0.48);
    border-radius: 9px;
    background: rgba(10, 23, 20, 0.97);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.38);
}

.river-completions button {
    display: grid;
    width: 100%;
    padding: 9px 12px;
    border: 0;
    border-bottom: 1px solid rgba(133, 220, 255, 0.12);
    background: transparent;
    color: #e8eee8;
    text-align: left;
    cursor: pointer;
}

.river-completions button:last-child {
    border-bottom: 0;
}

.river-completions button[aria-selected="true"] {
    background: linear-gradient(90deg, rgba(133, 220, 255, 0.2), rgba(199, 255, 56, 0.08));
}

.river-completions strong {
    color: var(--river-blue);
    font: 600 0.72rem/1.25 "DM Mono", monospace;
}

.river-completions small {
    overflow: hidden;
    color: #8ea097;
    font: 500 0.58rem/1.3 "DM Mono", monospace;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.river-source-line-state {
    position: absolute;
    z-index: 0;
    top: calc(
        var(--river-source-padding-y)
        + var(--river-source-scroll-y)
        + var(--river-source-line-index) * var(--river-source-line-step)
    );
    right: var(--river-source-padding-x);
    left: calc(var(--river-source-padding-x) - 8px);
    height: var(--river-source-line-step);
    border-left: 2px solid transparent;
    pointer-events: none;
    transition: background-color 160ms ease, border-color 160ms ease;
}

.river-token-comment {
    color: #79867c;
}

.river-token-function,
.river-token-section,
.river-token-keyword {
    color: var(--river-blue);
}

.river-token-variable,
.river-token-type {
    color: #ffd787;
}

.river-token-string {
    color: #b7e59b;
}

.river-token-number {
    color: #f1a5ff;
}

.river-token-intrinsic,
.river-token-patterndefinition {
    color: #b8acff;
}

.river-source-line-state[data-river-line-state="active"] {
    border-color: var(--river-green);
    background: linear-gradient(90deg, rgba(199, 255, 56, 0.18), transparent);
    box-shadow: 0 0 13px rgba(199, 255, 56, 0.16);
}

.river-source-line-state[data-river-line-state="error"] {
    border-color: var(--river-red);
    background: linear-gradient(90deg, rgba(255, 111, 94, 0.24), transparent);
    box-shadow: 0 0 14px rgba(255, 80, 65, 0.28);
}

.river-diagnostics {
    min-height: 48px;
    padding: 12px 17px;
    border-top: 1px solid rgba(255, 111, 94, 0.48);
    background: rgba(255, 111, 94, 0.1);
    color: #ffafa2;
    font: 400 0.61rem/1.5 var(--mono);
    white-space: pre-wrap;
}

.river-diagnostics[hidden] {
    display: none;
}

.river-editor-actions {
    display: grid;
    min-height: 55px;
    grid-template-columns: 1fr auto;
    align-items: center;
    border-top: 1px solid var(--river-border);
}

.river-editor-actions > span {
    padding: 0 17px;
    color: #657067;
    font: 500 0.53rem/1 var(--mono);
}

.river-editor-actions button {
    align-self: stretch;
    min-width: 118px;
    border: 0;
    border-left: 1px solid var(--river-border);
    background: var(--river-green);
    color: #0a0d0a;
    cursor: pointer;
    font: 600 0.61rem/1 var(--mono);
}

.river-editor-actions button i {
    margin-left: 8px;
    color: #3a4919;
    font-style: normal;
}

.river-editor-actions button:hover:not(:disabled) {
    background: var(--river-blue);
}

.river-editor-actions button:disabled {
    cursor: wait;
    opacity: 0.58;
}

.river-world-panel {
    position: relative;
    background: #071513;
}

.river-world-label {
    background: #0a100d;
}

.river-stage {
    --river-animation-play-state: paused;
    --river-character-size: 7.4cqw;
    --river-passenger-size: 5.92cqw;
    position: relative;
    container-type: inline-size;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    isolation: isolate;
    background: #0b5d6e;
}

.river-stage::after {
    position: absolute;
    z-index: 20;
    inset: 0;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 0 70px rgba(0, 12, 15, 0.48);
    content: "";
    pointer-events: none;
}

.river-landscape {
    position: absolute;
    z-index: 0;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
}

.river-light {
    position: absolute;
    z-index: 1;
    inset: 0;
    background:
        radial-gradient(circle at 18% 55%, rgba(255, 231, 118, 0.12), transparent 29%),
        radial-gradient(circle at 81% 52%, rgba(255, 231, 118, 0.12), transparent 29%),
        linear-gradient(180deg, rgba(5, 21, 30, 0.15), transparent 34%, rgba(4, 16, 19, 0.12));
    mix-blend-mode: screen;
    pointer-events: none;
}

.river-shore-label {
    position: absolute;
    z-index: 3;
    top: 5%;
    padding: 6px 8px;
    border: 1px solid rgba(246, 241, 218, 0.38);
    background: rgba(7, 22, 18, 0.62);
    color: rgba(249, 244, 222, 0.86);
    backdrop-filter: blur(5px);
    font: 500 clamp(0.42rem, 0.7vw, 0.58rem)/1 var(--mono);
    letter-spacing: 0.1em;
}

.river-shore-home {
    left: 4%;
}

.river-shore-far {
    right: 4%;
}

.river-boat,
.river-boat-hull,
.river-character,
.river-dust {
    position: absolute;
    transform: translate(-50%, -50%);
    will-change: left, top, translate, transform;
}

.river-stage[data-boat-heading="HOME"] .river-boat,
.river-stage[data-boat-heading="HOME"] .river-boat-hull {
    transform: translate(-50%, -50%) scaleX(-1);
}

.river-boat,
.river-boat-hull {
    width: 14.8%;
}

.river-boat {
    z-index: 6;
    filter: drop-shadow(0 5px 4px rgba(0, 25, 29, 0.42));
}

.river-boat-hull {
    z-index: 10;
    clip-path: polygon(0 63%, 100% 63%, 100% 100%, 0 100%);
    pointer-events: none;
}

.river-boat img,
.river-boat-hull img {
    display: block;
    width: 100%;
    height: auto;
}

.river-character {
    z-index: 7;
    width: var(--river-character-size);
    aspect-ratio: 1;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    filter: drop-shadow(0 8px 5px rgba(5, 24, 19, 0.35));
    transition: filter 160ms ease, opacity 180ms ease;
}

.river-sheep {
    --river-aboard-lift: -81.0667%;
    background-image: url("media/river-challenge/sheep.webp");
}

.river-wolf {
    --river-aboard-lift: -94%;
    background-image: url("media/river-challenge/wolf.webp");
}

.river-hay {
    --river-aboard-lift: -79.6%;
    background-image: url("media/river-challenge/hay.webp");
}

.river-character.is-aboard {
    z-index: 8;
    width: var(--river-passenger-size);
    transform: translate(-50%, var(--river-aboard-lift));
}

.river-blink-layer {
    position: absolute;
    inset: 0;
    z-index: 1;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    opacity: 0;
    animation: river-character-blink 7.3s steps(1, end) infinite;
    will-change: opacity;
    pointer-events: none;
}

.river-boat-farmer-blink {
    background-image: url("media/river-challenge/boat-blink.webp");
    mask-image: radial-gradient(ellipse 9% 15% at 36% 35%, #000 55%, transparent 78%);
}

.river-sheep-blink {
    animation-delay: -2.1s;
    animation-duration: 6.4s;
}
.river-wolf-blink {
    animation-delay: -4.6s;
    animation-duration: 8.1s;
}
.river-sheep-blink::before,
.river-sheep-blink::after,
.river-wolf-blink::before,
.river-wolf-blink::after {
    position: absolute;
    inset: 0;
    background: 0 0 / 100% 100% no-repeat;
    content: "";
    transform-origin: top left;
}
.river-sheep-blink::before,
.river-sheep-blink::after {
    background-image: url("media/river-challenge/sheep-blink.webp");
    transform: translateY(-3%);
}
.river-sheep-blink::before {
    mask-image: radial-gradient(ellipse 9% 9% at 45.5% 44%, #000 80%, transparent 100%);
}
.river-sheep-blink::after {
    mask-image: radial-gradient(ellipse 9% 9% at 68% 44%, #000 80%, transparent 100%);
}
.river-wolf-blink::before,
.river-wolf-blink::after {
    background-image: url("media/river-challenge/wolf-blink.webp");
}
.river-wolf-blink::before {
    mask-image: radial-gradient(ellipse 8% 7.5% at 36.4% 50.4%, #000 82%, transparent 100%);
}
.river-wolf-blink::after {
    mask-image: radial-gradient(ellipse 8% 7.5% at 55.9% 49%, #000 82%, transparent 100%);
    transform: translate(-1.8%, 1.2%);
}

.river-sheep-mouth {
    position: absolute;
    top: 52%;
    left: 56%;
    width: 9%;
    height: 7%;
    transform: translate(-50%, -50%) scaleY(0.12);
    transform-origin: center top;
    border: 1px solid #171312;
    border-radius: 45% 45% 52% 52%;
    background: #211718;
    opacity: 0;
    z-index: 2;
    pointer-events: none;
    transition: transform 90ms ease-out, opacity 70ms linear;
}

.river-sheep-mouth::after {
    position: absolute;
    right: 16%;
    bottom: 4%;
    left: 16%;
    height: 34%;
    border-radius: 50%;
    background: #b95d68;
    content: "";
}

.river-sheep.is-bellowing .river-sheep-mouth {
    transform: translate(-50%, -50%) scaleY(1);
    opacity: 1;
}

.river-character.is-fighting {
    animation: river-character-scuffle 150ms ease-in-out infinite alternate;
    animation-play-state: var(--river-animation-play-state, running);
}
.river-character.is-eaten {
    opacity: 0;
    filter: blur(5px);
}
.river-wolf-tongue {
    position: absolute;
    z-index: 2;
    top: 65.687%;
    left: 62.152%;
    width: 5.2%;
    aspect-ratio: 39 / 40;
    transform: translate(-50%, -50%) rotate(29.745deg);
    opacity: 0;
    pointer-events: none;
    will-change: top, left, transform;
}
.river-wolf-tongue svg {
    display: block;
    width: 100%;
    height: 100%;
    overflow: visible;
    filter: drop-shadow(0 0 1px #6d2633);
    transform: scaleX(0);
    transform-box: fill-box;
    transform-origin: left center;
    opacity: 0;
    will-change: transform, opacity;
}
.river-wolf-tongue-shape {
    fill: #f27086;
}
.river-wolf.is-licking .river-wolf-tongue {
    opacity: 1;
}
.river-dust {
    z-index: 12;
    top: 61%;
    left: 25%;
    display: none;
    width: 15%;
    aspect-ratio: 1.5;
}
.river-stage[data-danger-side="FAR"] .river-dust {
    left: 75%;
}
.river-dust.is-active {
    display: block;
}
.river-dust i {
    position: absolute;
    width: 42%;
    aspect-ratio: 1;
    animation: river-dust-pop 420ms ease-in-out infinite alternate;
    animation-play-state: var(--river-animation-play-state, running);
    border: 2px solid rgba(89, 68, 42, 0.32);
    border-radius: 50%;
    background: #dfc995;
    box-shadow: inset -7px -8px 0 rgba(119, 91, 55, 0.16);
}

.river-dust i:first-child {
    top: 26%;
    left: 4%;
}

.river-dust i:nth-child(2) {
    top: 2%;
    left: 27%;
    animation-delay: -210ms;
}

.river-dust i:nth-child(3) {
    top: 30%;
    left: 51%;
    animation-delay: -110ms;
}

.river-dust i:nth-child(4) {
    top: 49%;
    left: 25%;
    width: 31%;
    animation-delay: -310ms;
}

.river-dust i:nth-child(5) {
    top: 18%;
    left: 63%;
    width: 24%;
    animation-delay: -80ms;
}

.river-speech {
    --river-speech-edge: #3c503a;
    --river-speech-tail: #ddd3a8;
    position: absolute;
    z-index: 16;
    transform: translate(-75%, calc(-100% - 30px));
    transform-origin: 75% calc(100% + 30px);
    width: min(31%, 260px);
    padding: clamp(10px, 1.4vw, 18px);
    border: 2px solid var(--river-speech-edge);
    border-radius: 24px;
    box-shadow:
        0 0 0 3px rgba(240, 224, 163, 0.24),
        5px 7px 0 rgba(19, 48, 39, 0.3),
        0 17px 34px rgba(5, 28, 24, 0.25),
        inset 0 1px rgba(255, 255, 231, 0.8);
    background:
        radial-gradient(circle at 14% 18%, rgba(255, 253, 225, 0.86), transparent 34%),
        radial-gradient(circle at 88% 86%, rgba(82, 117, 66, 0.18), transparent 40%),
        repeating-linear-gradient(112deg, transparent 0 12px, rgba(101, 91, 54, 0.035) 13px 14px),
        linear-gradient(135deg, #eee8c9, #d8cda0);
    color: #233025;
    font-size: clamp(0.65rem, 1.15vw, 0.98rem);
    font-weight: 700;
    line-height: 1.35;
    text-shadow: 0 1px rgba(255, 255, 235, 0.72);
}

.river-speech::before {
    position: absolute;
    z-index: 2;
    top: -30px;
    right: 10px;
    width: 72px;
    height: 34px;
    transform: rotate(-7deg);
    background: url("media/river-challenge/speech-sprig.svg") center / contain no-repeat;
    content: "";
    filter: drop-shadow(0 2px 1px rgba(20, 44, 31, 0.35));
    pointer-events: none;
}

.river-speech::after {
    position: absolute;
    bottom: -22px;
    left: 69%;
    width: 32px;
    height: 32px;
    transform: rotate(45deg);
    border-right: 2px solid var(--river-speech-edge);
    border-bottom: 2px solid var(--river-speech-edge);
    background: var(--river-speech-tail);
    box-shadow: 3px 3px 2px rgba(19, 48, 39, 0.12);
    content: "";
}

.river-speech[data-side="FAR"] {
    --river-speech-edge: #4a6538;
    --river-speech-tail: #dce7ad;
    border-radius: 24px;
    background:
        radial-gradient(circle at 14% 18%, rgba(255, 255, 224, 0.85), transparent 34%),
        radial-gradient(circle at 88% 86%, rgba(88, 133, 60, 0.2), transparent 40%),
        repeating-linear-gradient(112deg, transparent 0 12px, rgba(78, 108, 49, 0.035) 13px 14px),
        linear-gradient(135deg, #eff3c8, #d4e69f);
}

.river-speech[hidden] {
    display: none;
}

.river-playback {
    display: grid;
    min-height: 50px;
    grid-template-columns: repeat(4, auto);
    justify-content: end;
    border-top: 1px solid var(--river-border);
    background: #09100d;
}

.river-playback button {
    min-width: 100px;
    padding: 0 14px;
    border: 0;
    border-left: 1px solid var(--river-border);
    background: transparent;
    color: #adb7af;
    cursor: pointer;
    font: 500 0.56rem/1 var(--mono);
}

.river-playback button:hover:not(:disabled) {
    background: #14251d;
    color: var(--river-green);
}

.river-playback button:disabled {
    cursor: default;
    opacity: 0.4;
}

.river-playback [data-river-playback-toggle] {
    color: var(--river-blue);
}

.river-playback [data-river-mute][aria-pressed="true"] {
    color: #757d77;
}

.river-program-message {
    min-height: 43px;
    margin: 0;
    padding: 13px 17px;
    border-top: 1px solid var(--river-border);
    color: #a9b3ab;
    font: 400 0.61rem/1.45 var(--mono);
}

.river-game[data-playback-state="failure"] .river-program-message,
.river-game[data-playback-state="error"] .river-program-message {
    color: #ffafa2;
}

.river-game[data-playback-state="success"] .river-program-message {
    color: var(--river-green);
}

.river-game-credit {
    display: flex;
    min-height: 42px;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 8px 17px;
    border-top: 1px solid var(--river-border);
    background: #070a08;
    color: #59635b;
    font: 500 0.51rem/1.4 var(--mono);
    letter-spacing: 0.04em;
}

.river-game-credit a {
    color: #849087;
}

.river-game-credit a:hover {
    color: var(--river-blue);
}

@keyframes river-character-scuffle {
    from { rotate: -8deg; translate: -4px 2px; }
    to { rotate: 9deg; translate: 4px -3px; }
}

@keyframes river-character-blink {
    0%, 91%, 95%, 100% { opacity: 0; }
    92%, 94% { opacity: 1; }
}

@keyframes river-dust-pop {
    from { transform: scale(0.78) translate(-4px, 3px); }
    to { transform: scale(1.06) translate(3px, -4px); }
}

@media (max-width: 1120px) {
    .river-game-body {
        grid-template-columns: 1fr;
    }

    .river-world-panel {
        order: 1;
    }

    .river-editor-panel {
        order: 2;
        border-top: 1px solid var(--river-border);
        border-right: 0;
    }

    .river-editor-shell {
        min-height: 265px;
    }
}

@media (max-width: 680px) {
    .river-game {
        box-shadow: 7px 7px 0 #152d26;
    }

    .river-game-header {
        grid-template-columns: 1fr auto;
    }

    .river-game-header strong {
        display: none;
    }

    .river-stage {
        --river-character-size: 10cqw;
        --river-passenger-size: 8cqw;
        aspect-ratio: 4 / 3;
    }

    .river-landscape {
        width: 134%;
        max-width: none;
        transform: translateX(-12.7%);
    }

    .river-boat,
    .river-boat-hull {
        width: 19%;
    }

    .river-speech {
        width: 41%;
        font-size: 0.64rem;
    }

    .river-shore-label {
        display: none;
    }

    .river-playback {
        grid-template-columns: repeat(2, 1fr);
    }

    .river-playback button {
        min-height: 42px;
        border-bottom: 1px solid var(--river-border);
    }

    .river-editor-shell {
        min-height: 250px;
    }

    .river-source,
    .river-source-highlight,
    .river-source-playback,
    .river-source-diagnostics {
        font-size: var(--river-source-font-size);
    }

    .river-editor-shell {
        --river-source-font-size: 0.64rem;
        --river-source-line-step: 1.248rem;
        --river-source-padding-x: 16px;
        --river-source-padding-y: 25px;
    }

    .river-game-credit {
        display: grid;
    }
}

@media (prefers-reduced-motion: reduce) {
    .river-character,
    .river-source-line-state,
    .river-blink-layer,
    .river-sheep-mouth,
    .river-wolf-tongue,
    .river-dust i,
    .river-speech {
        transition: none;
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
    }
}