:root {
    --page-bg: #111114;
    --panel-bg: rgba(28, 29, 34, 0.86);
    --panel-bg-strong: rgba(17, 18, 22, 0.94);
    --panel-border: rgba(255, 255, 255, 0.11);
    --text-primary: #f7f4ef;
    --text-secondary: #b8b3aa;
    --text-muted: #7e7a72;
    --accent: #22c7b8;
    --accent-hover: #48d9cc;
    --accent-ink: #061312;
    --warning: #f2b84b;
    --dot-color: #f32222;
    --stripe-dark-hi: #000000;
    --stripe-light-hi: #ffffff;
    --stripe-dark-lo: #666666;
    --stripe-light-lo: #999999;

    --bg-dark-current: var(--stripe-dark-hi);
    --bg-light-current: var(--stripe-light-hi);
    --foot-dark-color: var(--stripe-dark-hi);
    --foot-light-color: var(--stripe-light-hi);
    --stripe-width: 25px;
    --foot-width: 100px;
    --foot-height: 50px;
    --duration: 10s;
    --foot-gap: 58px;
    --foot-rotate: 0deg;
    --dot-size: 18px;
    --dot-y: 50%;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    min-height: 100%;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
    background:
        radial-gradient(circle at top left, rgba(34, 199, 184, 0.18), transparent 34rem),
        linear-gradient(145deg, #191917 0%, var(--page-bg) 52%, #0a0a0c 100%);
}

button,
input,
select {
    font: inherit;
}

.app-container {
    width: min(100%, 1240px);
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.app-container:fullscreen {
    width: 100vw;
    height: 100vh;
    max-width: none;
    gap: 12px;
    padding: 18px;
    background:
        radial-gradient(circle at top left, rgba(34, 199, 184, 0.18), transparent 34rem),
        linear-gradient(145deg, #191917 0%, var(--page-bg) 52%, #0a0a0c 100%);
}

.app-container:fullscreen .header {
    display: none;
}

.app-container:fullscreen .main-content {
    min-height: 0;
    flex: 1;
    display: grid;
    grid-template-rows: minmax(0, 1fr) auto;
    gap: 10px;
}

.app-container:fullscreen .illusion-container {
    min-height: 0;
    display: flex;
    padding: 10px;
}

.app-container:fullscreen .canvas {
    flex: 1;
    height: auto;
    min-height: 0;
}

.header {
    display: grid;
    gap: 10px;
    text-align: center;
}

.header h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 0.98;
    color: var(--text-primary);
}

.header p {
    max-width: 660px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.55;
}

.main-content {
    display: grid;
    gap: 12px;
}

.glassmorphism {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.illusion-container {
    padding: 18px;
    border-radius: 14px 14px 8px 8px;
}

.canvas {
    width: 100%;
    height: clamp(280px, 40vw, 360px);
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background:
        repeating-linear-gradient(
            to right,
            var(--bg-dark-current),
            var(--bg-dark-current) var(--stripe-width),
            var(--bg-light-current) var(--stripe-width),
            var(--bg-light-current) calc(var(--stripe-width) * 2)
        );
    box-shadow:
        inset 0 0 0 1px rgba(0, 0, 0, 0.36),
        inset 0 18px 38px rgba(0, 0, 0, 0.08);
}

.foot,
.reference-dot {
    position: absolute;
    animation: walk var(--duration) linear infinite alternate;
}

.foot {
    left: 2%;
    width: var(--foot-width);
    height: var(--foot-height);
    border-radius: 5px;
    z-index: 10;
    transform: rotate(var(--foot-rotate));
    transform-origin: center;
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
}

.dark-foot {
    top: calc(50% - var(--foot-gap) - var(--foot-height));
    background-color: var(--foot-dark-color);
}

.light-foot {
    top: calc(50% + var(--foot-gap));
    background-color: var(--foot-light-color);
}

.reference-dot {
    width: var(--dot-size);
    height: var(--dot-size);
    top: calc(var(--dot-y) - (var(--dot-size) / 2));
    left: calc(2% + ((var(--foot-width) - var(--dot-size)) / 2));
    z-index: 14;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    animation-name: walk-dot;
    transition: opacity 120ms ease, visibility 120ms ease;
}

.reference-dot::before {
    content: "";
    display: block;
    width: var(--dot-size);
    height: var(--dot-size);
    border-radius: 999px;
    background: var(--dot-color);
    box-shadow:
        0 0 0 3px rgba(255, 255, 255, 0.86),
        0 0 22px rgba(243, 34, 34, 0.75);
}

.canvas.show-dot .reference-dot {
    opacity: 1;
    visibility: visible;
}

.canvas:not(.playing) .foot,
.canvas:not(.playing) .reference-dot {
    animation-play-state: paused;
}

@keyframes walk {
    from {
        left: 2%;
    }

    to {
        left: calc(98% - var(--foot-width));
    }
}

@keyframes walk-dot {
    from {
        left: calc(2% + ((var(--foot-width) - var(--dot-size)) / 2));
    }

    to {
        left: calc(98% - var(--foot-width) + ((var(--foot-width) - var(--dot-size)) / 2));
    }
}

.controls {
    display: grid;
    grid-template-columns: 1fr;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    border-radius: 8px 8px 14px 14px;
}

.control-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.shape-controls {
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
}

.action-group {
    padding-right: 4px;
}

.control-button {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 8px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
    cursor: pointer;
    transition: background 150ms ease, border-color 150ms ease;
}

.action-group .control-button {
    width: 86px;
    flex: 0 0 86px;
}

.control-button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.24);
}

.control-button:active {
    background: rgba(255, 255, 255, 0.12);
}

.control-button:focus-visible,
.dropdown:focus-visible,
.number-group input:focus-visible,
.range-group input:focus-visible,
.switch-control input:focus-visible + .switch-track,
.task-button:focus-visible,
.task-link:focus-visible,
.condition-card:focus-visible,
.choice:focus-visible,
.note-field input:focus-visible {
    outline: 2px solid var(--warning);
    outline-offset: 2px;
}

.control-button.primary {
    color: var(--accent-ink);
    border-color: rgba(34, 199, 184, 0.78);
    background: var(--accent);
    font-weight: 800;
}

.control-button.primary:hover {
    background: var(--accent-hover);
}

.control-button[aria-pressed="true"]:not(.primary) {
    color: #ffffff;
    border-color: rgba(243, 34, 34, 0.78);
    background: rgba(243, 34, 34, 0.24);
}

.control-button svg {
    width: 18px;
    height: 18px;
    stroke-width: 2.4;
}

.switch-control {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 0 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.22);
    cursor: pointer;
    white-space: nowrap;
}

.switch-control input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.switch-track {
    width: 38px;
    height: 22px;
    position: relative;
    flex: 0 0 auto;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    transition: background 150ms ease;
}

.switch-track::after {
    content: "";
    width: 16px;
    height: 16px;
    position: absolute;
    top: 3px;
    left: 3px;
    border-radius: 999px;
    background: #ffffff;
    transition: transform 150ms ease;
}

.switch-control input:checked + .switch-track {
    background: var(--accent);
}

.switch-control input:checked + .switch-track::after {
    transform: translateX(16px);
}

.select-group,
.number-group,
.range-group {
    padding: 0 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.22);
}

.select-group span,
.number-group span,
.range-group span {
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
}

.dropdown,
.number-group input {
    height: 32px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    color: var(--text-primary);
    background: var(--panel-bg-strong);
}

.dropdown {
    min-width: 118px;
    padding: 0 30px 0 10px;
    cursor: pointer;
}

.number-group input {
    width: 58px;
    padding: 0 8px;
}

.range-group input[type="range"] {
    width: 120px;
    accent-color: var(--accent);
    cursor: pointer;
}

.range-group output {
    min-width: 34px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.task-ui {
    display: none;
}

body.task-mode {
    width: 100%;
    height: 100dvh;
    min-height: 100dvh;
    align-items: stretch;
    justify-content: stretch;
    padding: 0;
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    background: var(--page-bg);
}

body.task-mode .app-container {
    width: 100vw;
    max-width: none;
    height: 100dvh;
    gap: 0;
}

body.task-mode.task-screen-visible .app-container {
    visibility: hidden;
}

body.task-mode .header,
body.task-mode .controls {
    display: none;
}

body.task-mode .main-content {
    display: block;
    width: 100%;
    height: 100%;
}

body.task-mode .illusion-container {
    width: 100%;
    height: 100%;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

body.task-mode .canvas {
    width: 100vw;
    height: 100dvh;
    min-height: 100dvh;
    border: 0;
    border-radius: 0;
    box-shadow: none;
}

body.task-mode .task-ui {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 40;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    pointer-events: none;
}

.task-screen {
    position: fixed;
    inset: 0;
    display: none;
    padding: max(env(safe-area-inset-top, 0px), 22px) 18px max(env(safe-area-inset-bottom, 0px), 22px);
    overflow-y: auto;
    background:
        radial-gradient(circle at top left, rgba(34, 199, 184, 0.14), transparent 24rem),
        var(--page-bg);
    pointer-events: auto;
}

.task-screen.active {
    display: flex;
}

.task-screen-center {
    width: 100%;
    max-width: 430px;
    min-height: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    text-align: left;
}

.task-screen h1 {
    font-size: 1.65rem;
    line-height: 1.05;
    margin-bottom: 12px;
}

.task-intro {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.48;
    margin-bottom: 18px;
}

.task-kicker {
    margin-bottom: 8px;
    color: var(--accent);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.condition-list {
    display: grid;
    gap: 10px;
    margin-bottom: 18px;
}

.condition-card,
.choice,
.task-button,
.task-link {
    font: inherit;
}

.condition-card {
    display: grid;
    gap: 5px;
    width: 100%;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 8px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
    text-align: left;
    cursor: pointer;
}

.condition-card:active,
.choice:active,
.task-link:active {
    background: rgba(255, 255, 255, 0.12);
}

.condition-title {
    font-weight: 800;
}

.condition-desc {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.35;
}

.task-preview {
    margin: 0 0 22px;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    font-size: 0.92rem;
    line-height: 1.42;
}

.task-preview p {
    margin-bottom: 8px;
}

.task-preview ul {
    padding-left: 20px;
}

.task-preview li + li {
    margin-top: 3px;
}

.task-button {
    min-height: 48px;
    width: 100%;
    border: 1px solid rgba(34, 199, 184, 0.82);
    border-radius: 8px;
    color: var(--accent-ink);
    background: var(--accent);
    font-weight: 800;
    cursor: pointer;
}

.task-button:active {
    background: var(--accent-hover);
}

.task-button:disabled {
    color: var(--text-muted);
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.08);
    cursor: default;
}

.task-link {
    align-self: center;
    margin-top: 14px;
    border: 0;
    color: var(--text-secondary);
    background: transparent;
    font-size: 0.92rem;
    text-decoration: underline;
    cursor: pointer;
}

.task-overlay {
    position: fixed;
    top: max(env(safe-area-inset-top, 0px), 12px);
    left: 50%;
    z-index: 50;
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transform: translateX(-50%);
    pointer-events: auto;
}

body.task-running .task-overlay {
    display: flex;
}

.task-running-label {
    max-width: min(92vw, 430px);
    padding: 6px 10px;
    border-radius: 6px;
    color: #ffffff;
    background: rgba(0, 0, 0, 0.78);
    font-size: 0.82rem;
    font-weight: 700;
    text-align: center;
}

.task-done {
    min-width: 78px;
    min-height: 42px;
    border: 0;
    border-radius: 8px;
    color: var(--accent-ink);
    background: var(--accent);
    font-weight: 800;
    cursor: pointer;
}

.response-card {
    width: 100%;
    padding: 0 0 8px;
}

.response-back {
    margin: 0 0 16px;
}

.response-group {
    min-width: 0;
    margin: 0 0 18px;
    padding: 0;
    border: 0;
}

.response-group legend,
.note-field span {
    display: block;
    margin-bottom: 9px;
    color: var(--text-primary);
    font-size: 0.98rem;
    font-weight: 800;
}

.choice {
    width: 100%;
    min-height: 42px;
    margin-bottom: 7px;
    padding: 10px 12px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 8px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.93rem;
    text-align: left;
    cursor: pointer;
}

.choice.selected {
    color: var(--accent-ink);
    border-color: rgba(34, 199, 184, 0.85);
    background: var(--accent);
    font-weight: 800;
}

.strength-group {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 7px;
}

.strength-group legend {
    grid-column: 1 / -1;
}

.strength-group .choice {
    min-height: 40px;
    margin-bottom: 0;
    padding: 9px 6px;
    text-align: center;
}

.note-field {
    display: block;
    margin-bottom: 16px;
}

.note-field input {
    width: 100%;
    min-height: 44px;
    padding: 0 12px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.07);
}

.note-field input::placeholder {
    color: var(--text-muted);
}

.submit-response {
    margin-top: 4px;
}

.submit-status {
    min-height: 20px;
    margin-top: 10px;
    color: var(--text-secondary);
    font-size: 0.86rem;
    text-align: center;
}

@media (orientation: landscape) and (max-height: 520px) {
    .task-screen {
        padding: max(env(safe-area-inset-top, 0px), 14px) 16px max(env(safe-area-inset-bottom, 0px), 14px);
    }

    .task-screen-center {
        max-width: 680px;
        justify-content: flex-start;
    }

    .condition-list {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .response-card {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 12px;
        align-items: start;
    }

    .response-card > .response-back,
    .response-card > .task-kicker,
    .response-card > h1,
    .response-card > .note-field,
    .response-card > .submit-response,
    .response-card > .submit-status {
        grid-column: 1 / -1;
    }

    .response-card .strength-group {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1180px) {
    .controls {
        gap: 10px;
    }
}

@media (max-width: 720px) {
    body {
        align-items: flex-start;
        padding: 18px;
    }

    .app-container {
        gap: 16px;
    }

    .illusion-container {
        padding: 10px;
    }

    .control-group,
    .control-row,
    .control-button,
    .switch-control,
    .select-group,
    .number-group,
    .range-group {
        width: 100%;
    }

    .action-group {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        padding-right: 0;
    }

    .action-group .control-button {
        width: 100%;
        flex-basis: auto;
    }

    .select-group,
    .number-group,
    .range-group {
        justify-content: space-between;
    }

    .range-group input[type="range"] {
        width: min(46vw, 220px);
    }
}

@media (max-width: 420px) {
    body {
        padding: 12px;
    }

    .header p {
        font-size: 0.95rem;
    }

    .canvas {
        height: 260px;
    }

    :root {
        --foot-width: 82px;
        --foot-gap: 44px;
    }
}