/* design tokens */

:root {
    --font-stack: "Google Sans", "Roboto", Arial, sans-serif;
    --panel-surface: rgba(20, 20, 20, 0.95);
    --panel-border: rgba(255, 255, 255, 0.1);
    --panel-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    --soft-surface: rgba(255, 255, 255, 0.06);
    --soft-surface-hover: rgba(255, 255, 255, 0.12);
    --soft-surface-muted: rgba(255, 255, 255, 0.04);
    --soft-border: rgba(255, 255, 255, 0.08);
    --soft-border-strong: rgba(255, 255, 255, 0.3);
    --button-surface: rgba(255, 255, 255, 0.05);
    --button-border: rgba(255, 255, 255, 0.08);
    --button-glow: 0 0 12px rgba(255, 255, 255, 0.15);
    --close-accent: #ff5a52;
    --reset-accent: #e7c039;
    --spotify-accent: #25d865;
    --pages-accent: #7aa3ff;
    --settings-accent: #b48dff;
}

/* page frame */

html,
body {
    height: 100%;
}

body {
    background-color: black;
    color: white;
    overflow: hidden;
    font-family: var(--font-stack);
    margin: 0;
    user-select: none;
    --slime-base-y: -45px;
    --slime-nod-peak-y: -75px;
    --split-menu-space: 160px;
    --settings-menu-safe-bottom: 16px;
}

button,
input,
select {
    font: inherit;
}

#bg-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.hue-anim {
    animation: hue-rotate 5s linear infinite;
    filter: hue-rotate(0deg);
}

@keyframes hue-rotate {
    from {
        filter: hue-rotate(0deg);
    }

    to {
        filter: hue-rotate(360deg);
    }
}

/* slime and text layout */

#slime-container {
    position: relative;
    width: 100%;
    height: 65vh;
    margin-top: 5vh;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    transition:
        width 0.42s ease,
        max-width 0.42s ease,
        height 0.42s ease,
        transform 0.42s ease,
        margin-top 0.42s ease,
        padding 0.42s ease;
}

#slime,
#bw-slime {
    display: block;
    width: auto;
    height: auto;
    user-select: none;
}

#slime {
    max-width: min(90vw, 90%);
    max-height: 100%;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition:
        transform 0.6s cubic-bezier(0.23, 1, 0.32, 1),
        max-width 0.42s ease,
        max-height 0.42s ease,
        filter 0.8s ease-out;
    transform: translateY(var(--slime-base-y)) scale(1);
}

#slime.blocked {
    filter: brightness(0.7) !important;
    cursor: default;
}

.nod-ready {
    animation: nod-anim 0.35s cubic-bezier(0.25, 0.46, 0.45, 1.4);
}

@keyframes nod-anim {
    0% {
        transform: translateY(var(--slime-base-y));
    }

    40% {
        transform: translateY(var(--slime-nod-peak-y));
    }

    100% {
        transform: translateY(var(--slime-base-y));
    }
}

#text-container {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    padding: 10px;
    z-index: 1;
    transition:
        opacity 0.5s ease,
        top 0.42s ease,
        bottom 0.42s ease,
        left 0.42s ease,
        width 0.42s ease,
        transform 0.42s ease,
        padding 0.42s ease;
    box-sizing: border-box;
}

body.split-layout #slime-container {
    /* in split mode the slime uses the left half and leaves room for the bottom menu. */
    width: 50vw;
    max-width: 50vw;
    height: calc(100vh - var(--split-menu-space));
    margin-top: 0;
    justify-content: flex-end;
    padding-right: clamp(16px, 4vw, 56px);
    transform: translateX(clamp(-24px, -2.5vw, -56px));
}

body.split-layout #slime {
    max-width: min(36vw, 90%);
    max-height: min(calc(100vh - var(--split-menu-space) - 24px), 78vh);
}

body.short-split-layout {
    --slime-base-y: -20px;
    --slime-nod-peak-y: -44px;
}

body.split-layout #text-container {
    top: 0 !important;
    bottom: var(--split-menu-space);
    left: 50%;
    right: auto;
    width: min(34vw, 460px);
    transform: translateX(clamp(12px, 1.6vw, 28px));
    align-items: flex-start;
    text-align: left;
    justify-content: center;
    padding: 24px 24px 24px clamp(16px, 3vw, 40px);
}

body.split-layout #date {
    font-size: clamp(1.5rem, min(2vw, 4.2vh), 2.8rem);
}

body.split-layout #clock {
    font-size: clamp(3rem, min(5.5vw, 9.5vh), 6.5rem);
}

body.split-layout #counter {
    font-size: clamp(2rem, min(3.3vw, 5.8vh), 3.9rem);
    transform-origin: top left;
}

body.compact-stack #slime-container {
    /* compact stack is the fallback when the text block would crowd the menu. */
    height: 52vh;
    margin-top: 3vh;
}

body.compact-stack #slime {
    max-height: 88%;
}

body.compact-stack #date {
    font-size: 1.6rem;
}

body.compact-stack #clock {
    font-size: 3.1rem;
}

body.compact-stack #counter {
    font-size: 2.15rem;
}

body.split-layout #counter-warning {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    transform: none;
    margin-top: 0;
    align-items: flex-start;
    text-align: left;
    width: max-content;
    max-width: calc(100vw - 32px);
}

body.split-layout #counter-block,
body.split-layout #counter {
    align-items: flex-start;
    align-self: flex-start;
}

#date,
#clock,
#counter {
    display: flex;
    pointer-events: auto;
}

#counter-block {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: fit-content;
}

#counter-warning {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: max-content;
    max-width: calc(100vw - 32px);
    margin-top: 0;
}

#date {
    font-size: 2rem;
    font-weight: 500;
    color: white;
    margin: 0;
    line-height: 1.2;
    transition: font-size 0.35s ease;
}

#clock {
    font-size: 4rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.2;
    transition: font-size 0.35s ease, transform 0.35s ease;
}

#counter {
    font-size: 2.5rem;
    font-weight: 600;
    color: white;
    margin: 5px 0 0;
    opacity: 0;
    line-height: 1;
    position: relative;
    transform: scale(1);
    transform-origin: center;
    transition:
        opacity 0.8s ease,
        transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275),
        font-size 0.35s ease;
}

#counter.combo {
    transform: scale(1.25);
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
}

#counter.negative {
    color: #ff8585;
}

#counter-warning {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    width: max-content;
    max-width: calc(100vw - 32px);
    min-width: 0;
    color: rgba(255, 255, 255, 0.52);
    font-size: 0.78rem;
    line-height: 1.35;
    text-align: center;
    pointer-events: none;
    translate: 0 0;
    animation: counter-warning-float 4.8s ease-in-out infinite;
}

#counter-warning .counter-warning-line {
    display: grid;
    grid-template-columns: 1.15em minmax(0, 1fr);
    align-items: start;
    width: 100%;
}

#counter-warning .counter-warning-prefix {
    display: inline-flex;
    justify-content: center;
}

#counter-warning-primary {
    white-space: nowrap;
}

#counter-warning .counter-warning-text {
    display: block;
}

#counter-warning[hidden] {
    display: none;
}

@keyframes counter-warning-float {
    0%,
    100% {
        translate: 0 0;
    }

    50% {
        translate: 0 -6px;
    }
}

/* rolling text */

.digit-container {
    position: relative;
    display: inline-block;
    height: 1em;
    width: 0.6em;
    text-align: center;
}

.digit-group {
    display: inline-flex;
    align-items: center;
    position: relative;
}

.digit-group.blur-group {
    background: rgba(255, 255, 255, 0.12);
    overflow: hidden;
    padding: 0 0.04em;
    margin: 0 -0.04em;
}

.digit-group.blur-group .digit {
    pointer-events: none;
    filter: blur(0.22em);
}

.sep {
    width: 0.45em;
}

.digit {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

.digit.new {
    transform: translateY(-120%);
    opacity: 0;
}

#counter.counter--down .digit.new {
    transform: translateY(120%);
}

.digit.current {
    transform: translateY(0);
    opacity: 1;
}

.digit.old {
    transform: translateY(120%);
    opacity: 0;
}

#counter.counter--down .digit.old {
    transform: translateY(-120%);
}

/* bottom menu */

#menu {
    position: fixed;
    bottom: -150px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(3px) saturate(200%);
    -webkit-backdrop-filter: blur(3px) saturate(200%);
    padding: 14px 18px;
    border-radius: 20px;
    display: flex;
    gap: 14px;
    align-items: stretch;
    justify-content: center;
    width: max-content;
    max-width: calc(100vw - 24px);
    flex-wrap: nowrap;
    opacity: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 10000;
    box-sizing: border-box;
    transition: bottom 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55), opacity 0.5s ease;
}

#menu.show {
    bottom: 30px;
    opacity: 1;
}

#menu .menu-button {
    /* all main controls share one base button shell, then accents layer on top by id. */
    background: var(--button-surface);
    color: white;
    border-radius: 12px;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-family: var(--font-stack);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid var(--button-border);
    box-sizing: border-box;
    height: 42px;
    transition:
        background 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.3s ease,
        color 0.3s ease;
}

#menu .menu-button:hover {
    transform: translateY(-2px);
    background: var(--soft-surface-hover);
    border-color: white;
    box-shadow: var(--button-glow);
}

#menu .menu-button:active {
    transform: translateY(1px) scale(0.95);
}

#menu #reset:hover {
    border-color: var(--reset-accent) !important;
    box-shadow: 0 0 15px rgba(231, 192, 57, 0.3) !important;
}

#menu #reset:active,
#menu #reset.is-armed,
#menu #reset.is-armed:hover {
    background: var(--reset-accent) !important;
    border-color: var(--reset-accent) !important;
    color: black !important;
}

#menu #spotify-btn:hover,
#menu #spotify-btn.active-widget {
    border-color: var(--spotify-accent) !important;
    box-shadow: 0 0 15px rgba(37, 216, 101, 0.3) !important;
}

#menu #spotify-btn:active,
#menu #spotify-btn.active-widget {
    background: var(--spotify-accent) !important;
}

#menu #spotify-btn:active img,
#menu #spotify-btn.active-widget img {
    filter: brightness(0);
}

#menu #pages-btn:hover,
#menu #pages-btn.active-widget {
    border-color: var(--pages-accent) !important;
    box-shadow: 0 0 15px rgba(122, 163, 255, 0.3) !important;
}

#menu #pages-btn:active,
#menu #pages-btn.active-widget {
    background: var(--pages-accent) !important;
}

#menu #pages-btn:active img,
#menu #pages-btn.active-widget img {
    filter: brightness(0);
}

#menu #settings-btn:hover,
#menu #settings-btn.active-widget {
    border-color: var(--settings-accent) !important;
    box-shadow: 0 0 15px rgba(180, 141, 255, 0.3) !important;
}

#menu #settings-btn:active,
#menu #settings-btn.active-widget {
    background: var(--settings-accent) !important;
    color: black !important;
}

#menu #close:hover {
    border-color: var(--close-accent) !important;
    box-shadow: 0 0 15px rgba(255, 90, 82, 0.3) !important;
}

#menu #close:active {
    background: var(--close-accent) !important;
    color: black !important;
}

.button-icon {
    width: 20px;
    height: 20px;
    display: block;
}

/* spotify drawer */

#spotify-widget {
    position: fixed;
    top: 20px;
    bottom: 20px;
    right: 20px;
    width: 360px;
    z-index: 9000;
    border-radius: 12px;
    transform: translateX(150%);
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.5s ease;
}

#spotify-widget.open {
    transform: translateX(0);
}

.spotify-frame {
    width: 100%;
    height: 100% !important;
    border: none;
    border-radius: 12px;
}

/* overlays */

.overlay-panel {
    /* pages and settings reuse the same blurred fullscreen overlay pattern. */
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
    font-family: var(--font-stack);
}

.overlay-panel.open {
    opacity: 1;
    pointer-events: auto;
}

#pages-menu {
    z-index: 9500;
}

#settings-menu {
    z-index: 9550;
    padding: 16px 16px var(--settings-menu-safe-bottom) 16px;
    box-sizing: border-box;
}

.panel-card {
    background: var(--panel-surface);
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    padding: 18px 18px 16px;
    box-shadow: var(--panel-shadow);
    box-sizing: border-box;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.panel-header h2 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: lowercase;
}

.panel-close {
    background: var(--button-surface);
    color: white;
    border-radius: 10px;
    padding: 6px 10px;
    font-size: 0.9rem;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-transform: lowercase;
    transition:
        background 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.3s ease,
        color 0.3s ease;
}

.panel-close:hover {
    transform: translateY(-2px);
    background: var(--soft-surface-hover);
    border-color: var(--close-accent);
    box-shadow: 0 0 15px rgba(255, 90, 82, 0.3);
}

.panel-close:active {
    transform: translateY(1px) scale(0.95);
    background: var(--close-accent);
    color: black;
}

#pages-card {
    width: min(92vw, 520px);
}

#pages-list,
#settings-list,
.settings-section,
.settings-subsection,
.settings-copy {
    display: flex;
    flex-direction: column;
}

#pages-list {
    gap: 10px;
}

.pages-link,
.settings-item {
    /* these cards share the same hover language so overlays feel related. */
    color: white;
    border-radius: 12px;
    border: 1px solid var(--soft-border);
    text-transform: lowercase;
    transition:
        transform 0.3s ease,
        background 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        color 0.3s ease;
}

.pages-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    text-decoration: none;
    background: var(--soft-surface);
}

.pages-link:hover {
    transform: translateY(-2px);
    background: var(--soft-surface-hover);
    border-color: var(--soft-border-strong);
}

.pages-badge {
    font-size: 0.8rem;
    opacity: 0.7;
    text-transform: lowercase;
}

.pages-soon {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.7);
    background: var(--soft-surface-muted);
    border: 1px dashed rgba(255, 255, 255, 0.15);
    font-size: 0.95rem;
    text-transform: lowercase;
}

#settings-card {
    width: min(92vw, 440px);
    max-width: 100%;
    max-height: min(calc(100vh - 16px - var(--settings-menu-safe-bottom)), 720px);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.38) transparent;
}

#settings-card::-webkit-scrollbar {
    width: 10px;
}

#settings-card::-webkit-scrollbar-track {
    background: transparent;
}

#settings-card::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0.26));
    border-radius: 999px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

#settings-card::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.34));
}

#settings-list {
    gap: 14px;
}

.settings-section {
    gap: 10px;
}

.settings-section-title {
    margin: 0 2px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: lowercase;
    color: rgba(255, 255, 255, 0.58);
}

.settings-section-title::after {
    content: "";
    flex: 1 1 auto;
    border-bottom: 2px dotted rgba(255, 255, 255, 0.34);
    transform: translateY(1px);
}

.settings-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 14px;
    background: var(--soft-surface);
    cursor: pointer;
}

.settings-item:hover {
    transform: translateY(-2px);
    background: var(--soft-surface-hover);
    border-color: white;
    box-shadow: var(--button-glow);
}

.settings-item:active {
    transform: translateY(1px) scale(0.98);
}

.settings-copy {
    gap: 2px;
    min-width: 0;
}

.settings-title {
    font-size: 0.98rem;
}

.settings-desc {
    font-size: 0.82rem;
    opacity: 0.7;
    line-height: 1.35;
}

.settings-item input:not(.settings-number-input) {
    margin: 0;
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
}

.settings-cheat-row {
    cursor: default;
}

.settings-cheat-row:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--soft-border);
    background: var(--soft-surface);
}

.settings-inline-controls {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
}

.settings-number-input {
    appearance: textfield;
    -moz-appearance: textfield;
    width: 220px;
    max-width: min(220px, 42vw);
    min-width: 0;
    min-height: 48px;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.08);
    color: white;
    font-size: 1rem;
    box-sizing: border-box;
}

.settings-number-input::-webkit-outer-spin-button,
.settings-number-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.settings-number-input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.45);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
}

.settings-number-input:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.settings-select {
    appearance: none;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.08);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 8px 34px 8px 12px;
    text-transform: lowercase;
    cursor: pointer;
    min-width: 118px;
    background-image:
        linear-gradient(45deg, transparent 50%, white 50%),
        linear-gradient(135deg, white 50%, transparent 50%);
    background-position:
        calc(100% - 18px) calc(50% - 3px),
        calc(100% - 12px) calc(50% - 3px);
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
}

.settings-select:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.45);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
}

.settings-select option {
    color: black;
    background: white;
}

.settings-item[data-select-target] {
    user-select: none;
}

#cheats-indicator {
    position: fixed;
    left: 50%;
    bottom: var(--cheats-indicator-offset, -120px);
    transform: translateX(-50%);
    z-index: 10001;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.8rem;
    line-height: 1;
    backdrop-filter: blur(3px) saturate(200%);
    -webkit-backdrop-filter: blur(3px) saturate(200%);
    opacity: 0;
    transition: bottom 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55), opacity 0.5s ease;
}

#cheats-indicator.show {
    opacity: 1;
}

#cheats-indicator.fade-out {
    opacity: 0;
}

#cheats-indicator[hidden] {
    display: none;
}

.settings-subsection {
    gap: 10px;
}

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

/* transient effects */

.plusone {
    /* small click reward. */
    position: absolute;
    color: white;
    font-size: 2rem;
    font-weight: 600;
    animation: plusone-move 0.8s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
    pointer-events: none;
    z-index: 2;
}

@keyframes plusone-move {
    0% {
        transform: translate(-50%, 10px) scale(0.5);
        opacity: 0;
    }

    30% {
        transform: translate(-50%, -20px) scale(1.2);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, -80px) scale(1);
        opacity: 0;
    }
}

.minusone {
    position: absolute;
    color: #ff8585;
    font-size: 2rem;
    font-weight: 600;
    animation: minusone-move 0.8s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
    pointer-events: none;
    z-index: 2;
}

@keyframes minusone-move {
    0% {
        transform: translate(-50%, 0px) scale(0.5);
        opacity: 0;
    }

    30% {
        transform: translate(-50%, 20px) scale(1.2);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, 60px) scale(1);
        opacity: 0;
    }
}

.plusten {
    /* larger reward shown when leaving bw mode. */
    position: absolute;
    color: white;
    font-size: 4rem;
    font-weight: 800;
    display: flex;
    animation: plusten-hold-move 2.1s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
    pointer-events: none;
    z-index: 12000;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.plusten span {
    display: inline-block;
    animation: big-wave 0.5s ease-in-out infinite alternate;
}

.plusten span:nth-child(2) {
    animation-delay: 0.12s;
}

.plusten span:nth-child(3) {
    animation-delay: 0.24s;
}

@keyframes plusten-hold-move {
    0% {
        transform: translate(-50%, 10px) scale(0.7);
        opacity: 0;
    }

    15% {
        transform: translate(-50%, -30px) scale(1.3);
        opacity: 1;
    }

    70% {
        transform: translate(-50%, -40px) scale(1.3);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, -120px) scale(1);
        opacity: 0;
    }
}

@keyframes big-wave {
    from {
        transform: translateY(-10px);
    }

    to {
        transform: translateY(10px);
    }
}

.shake {
    animation: shake 0.5s ease-in-out infinite;
}

@keyframes shake {
    0%,
    100% {
        transform: translateX(0);
    }

    20% {
        transform: translateX(-2px);
    }

    40% {
        transform: translateX(2px);
    }

    60% {
        transform: translateX(-2px);
    }

    80% {
        transform: translateX(2px);
    }
}

.explosion-effect {
    position: absolute;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    object-fit: fill;
}

/* hammer and bw mode */

#hammer {
    position: fixed;
    left: 60px;
    bottom: -100px;
    font-size: 60px;
    cursor: grab;
    z-index: 11000;
    user-select: none;
    pointer-events: auto;
    transition: transform 0.1s linear, bottom 0.3s ease-out, opacity 0.5s ease;
}

#hammer:active {
    cursor: grabbing;
}

#bw-scene {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: flex-start;
    padding-left: 56px;
    padding-right: 24px;
    box-sizing: border-box;
    pointer-events: none;
    z-index: 8500;
}

#bw-slime {
    max-width: min(calc(100vw - 80px), 820px);
    max-height: min(calc(100vh - 48px), 72vh);
    opacity: 0;
    filter: grayscale(1) brightness(0);
    transform: translateY(-45px) scale(1.1);
    transition: opacity 1.6s ease, filter 2s ease-in-out;
    pointer-events: auto;
}

#bw-slime.faded-in {
    opacity: 1;
    filter: grayscale(1) brightness(0.7);
}

.bw-mode #bg-canvas,
.bw-mode #menu,
.bw-mode #text-container,
.bw-mode #spotify-widget,
.bw-mode #pages-menu,
.bw-mode #settings-menu,
.bw-mode #hammer {
    /* hide the normal scene instantly so the grayscale reveal feels abrupt. */
    transition: none !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

.bw-mode #slime-container {
    opacity: 0 !important;
    pointer-events: none !important;
}

.bw-mode #bw-scene {
    display: flex;
}

/* responsive layout */

@media (max-width: 900px) {
    #pages-menu,
    #settings-menu {
        padding: 20px;
        box-sizing: border-box;
    }

    #pages-card {
        width: min(100%, 520px);
    }

    #settings-card {
        width: min(100%, 440px);
    }

    #menu.show {
        bottom: 20px;
    }

    #menu {
        width: max-content;
        max-width: calc(100vw - 40px);
        padding: 12px;
        gap: 10px;
        flex-wrap: nowrap;
    }

    #menu .menu-button {
        flex: 0 1 auto;
        min-width: 0;
    }
}

@media (max-width: 700px) {
    #pages-menu,
    #settings-menu {
        padding: 16px;
    }

    #pages-card,
    #settings-card {
        width: 100%;
        max-width: 100%;
    }

    #menu.show {
        bottom: 16px;
    }

    #menu {
        width: calc(100vw - 32px);
        max-width: calc(100vw - 32px);
        padding: 10px;
        gap: 8px;
        border-radius: 18px;
        flex-wrap: wrap;
    }

    #menu .menu-button {
        flex: 1 1 calc(50% - 8px);
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    #menu #pages-btn,
    #menu #settings-btn {
        order: 1;
    }

    #menu #reset {
        order: 2;
    }

    #menu #close {
        order: 3;
    }

    #menu #spotify-btn {
        order: 4;
    }

    #menu #reset,
    #menu #close,
    #menu #spotify-btn {
        flex: 1 1 calc((100% - 16px) / 3);
        width: calc((100% - 16px) / 3);
        padding: 8px;
        min-width: 0;
    }

    .settings-cheat-row {
        align-items: flex-start;
    }

    .settings-inline-controls {
        width: 100%;
        justify-content: flex-end;
    }

    .settings-number-input {
        flex: 1 1 auto;
        max-width: none;
    }

    #cheats-indicator {
        max-width: calc(100vw - 32px);
        text-align: center;
    }
}

body.menu-force-horizontal #menu {
    /* settings can override the responsive menu and keep everything on one row. */
    width: max-content !important;
    max-width: calc(100vw - 24px) !important;
    padding: 10px !important;
    gap: 8px !important;
    border-radius: 18px !important;
    flex-wrap: nowrap !important;
    flex-direction: row !important;
    justify-content: center !important;
    align-items: stretch !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    scrollbar-width: none;
}

body.menu-force-horizontal #menu::-webkit-scrollbar {
    display: none;
}

body.menu-force-horizontal #menu.show {
    bottom: 16px !important;
}

body.viewport-vertical.menu-force-horizontal #menu {
    width: calc(100vw - 32px) !important;
    max-width: calc(100vw - 32px) !important;
    justify-content: stretch !important;
}

body.viewport-vertical.menu-force-horizontal #menu #pages-btn,
body.viewport-vertical.menu-force-horizontal #menu #settings-btn {
    flex: 1 1 0 !important;
}

body.viewport-vertical.menu-force-horizontal #menu #reset,
body.viewport-vertical.menu-force-horizontal #menu #spotify-btn,
body.viewport-vertical.menu-force-horizontal #menu #close {
    flex: 0 0 auto !important;
}

body.menu-force-horizontal #menu .menu-button {
    flex: 0 1 auto !important;
    width: auto !important;
    min-width: 0 !important;
    padding: 8px 12px !important;
    font-size: 0.85rem !important;
}

body.menu-force-horizontal #menu #reset {
    order: 1 !important;
}

body.menu-force-horizontal #menu #settings-btn {
    order: 2 !important;
}

body.menu-force-horizontal #menu #pages-btn {
    order: 3 !important;
}

body.menu-force-horizontal #menu #spotify-btn {
    order: 4 !important;
}

body.menu-force-horizontal #menu #close {
    order: 5 !important;
}

body.menu-force-vertical #menu {
    /* the vertical override restores the wrapped mobile-style grid on any screen. */
    display: flex !important;
    width: calc(100vw - 32px) !important;
    max-width: calc(100vw - 32px) !important;
    padding: 10px !important;
    gap: 8px !important;
    border-radius: 18px !important;
    flex-wrap: wrap !important;
    flex-direction: row !important;
    justify-content: center !important;
    align-items: stretch !important;
}

body.menu-force-vertical #menu.show {
    bottom: 16px !important;
}

body.menu-force-vertical #menu .menu-button {
    flex: 1 1 calc(50% - 8px) !important;
    width: auto !important;
    min-width: 0 !important;
    padding: 8px 12px !important;
    font-size: 0.85rem !important;
}

body.menu-force-vertical #menu #pages-btn,
body.menu-force-vertical #menu #settings-btn {
    order: 1 !important;
}

body.menu-force-vertical #menu #reset {
    order: 2 !important;
}

body.menu-force-vertical #menu #close {
    order: 3 !important;
}

body.menu-force-vertical #menu #spotify-btn {
    order: 4 !important;
}

body.menu-force-vertical #menu #reset,
body.menu-force-vertical #menu #close,
body.menu-force-vertical #menu #spotify-btn {
    flex: 1 1 calc((100% - 16px) / 3) !important;
    width: calc((100% - 16px) / 3) !important;
    padding: 8px !important;
}