:root {
    --example-header-height: 64px;
}

body {
    margin: 0;
    padding-bottom: var(--example-header-height);
}

.example-header {
    --header-bg: rgb(248 250 252 / 35%);
    --header-text: #172b3a;
    --header-muted: #526778;
    --header-border: #dbe4ec;
    --control-bg: #fff;
    --control-border: #ccd9e3;
    --control-hover: #edf3f7;
    --accent: #16739b;
    --accent-bg: #e5f3fa;
    --accent-border: #b7dce9;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    z-index: 2147483647;
    box-sizing: border-box;
    padding: 6px 16px max(6px, env(safe-area-inset-bottom));
    color: var(--header-text);
    background: var(--header-bg);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    border-top: 1px solid var(--header-border);
    font: 13px/1.4 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    text-align: left;
    color-scheme: light;
}

body[data-example="big"] .example-header,
body[data-example="multicolor"] .example-header,
body[data-example="balls"] .example-header,
body[data-example="some_layers"] .example-header,
body[data-example="3d_cube"] .example-header,
body[data-example="scroll_page"] .example-header,
body[data-example="constructor"].body_bg_black .example-header {
    --header-bg: rgb(16 18 20 / 20%);
    --header-text: #e5e9ed;
    --header-muted: #a4adb6;
    --header-border: #282d32;
    --control-bg: #1a1e22;
    --control-border: #343c44;
    --control-hover: #262d34;
    --accent: #8dcde8;
    --accent-bg: #19313d;
    --accent-border: #2d5365;
    color-scheme: dark;
}

/* Keep labels readable over both the white and black quadrants. */
body[data-example="some_layers"] .example-header {
    --header-bg: rgb(16 18 20 / 65%);
    --header-muted: #e5e9ed;
}

/* The difference layer renders over a white canvas with large black flakes. */
body[data-example="blend_mode"] .example-header {
    --header-bg: rgb(248 250 252 / 75%);
    --header-muted: #344656;
}

.example-heading,
.example-tools,
.example-navigation,
.example-controls,
.example-playback,
[data-example-controls] {
    display: flex;
    align-items: center;
    gap: 6px;
}

.example-heading {
    flex-wrap: wrap;
    gap: 4px 12px;
    margin-bottom: 2px;
}

.example-tools {
    flex-shrink: 0;
    flex-wrap: wrap;
    justify-content: flex-end;
    align-self: flex-end;
    max-width: 55%;
}

.example-navigation {
    order: 2;
    flex-shrink: 0;
    align-self: flex-end;
}

#example-picker {
    width: 216px;
}

.example-brand {
    color: var(--header-text);
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    font-size: 11px;
}

.example-brand a {
    color: inherit;
    text-decoration: none;
}

.example-brand a:hover {
    text-decoration: underline;
}

.example-brand__icon {
    color: var(--accent);
    font-size: 15px;
    vertical-align: middle;
    margin-right: 5px;
}

.example-brand .example-brand__label {
    color: var(--header-muted);
    font-weight: 400;
}

.example-intro {
    max-width: 720px;
    min-width: 0;
}

.example-header h1 {
    margin: 0;
    color: var(--header-text);
    font-size: 15px;
    line-height: 1.2;
    letter-spacing: -0.3px;
}

.example-header p {
    margin: 0;
    color: var(--header-muted);
    font-size: 12px;
}

.example-controls {
    flex-shrink: 0;
    flex-wrap: wrap;
    justify-content: flex-end;
    max-width: 390px;
}

.example-header button,
.example-header select,
.example-step {
    box-sizing: border-box;
    min-height: 30px;
    padding: 4px 8px;
    border: 1px solid var(--control-border);
    border-radius: 6px;
    background: var(--control-bg);
    color: var(--header-text);
    font: inherit;
    cursor: pointer;
}

.example-header label {
    margin: 0;
    white-space: nowrap;
}

.example-header input[type="checkbox"] {
    accent-color: var(--accent);
}

.example-header #example-pause {
    min-width: 70px;
    background: var(--accent-bg);
    border-color: var(--accent-border);
    color: var(--accent);
    font-weight: 600;
}

.example-step {
    min-width: 32px;
    text-align: center;
    text-decoration: none;
}

.example-header button:hover,
.example-step:hover {
    background: var(--control-hover);
}

.example-header :focus-visible {
    outline: 3px solid #1786b5;
    outline-offset: 3px;
}

.example-playback[hidden] {
    display: none;
}

.example-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

/* Center contained scenes in the space above the bottom panel. */
body[data-example="layer"] #layer {
    top: calc((100vh - var(--example-header-height)) / 2);
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - var(--example-header-height) - 32px);
    margin: 0;
    transform: translate(-50%, -50%);
    border-color: #a2c2d5;
    border-radius: 12px;
}

body[data-example="z-index"] #top-layer,
body[data-example="z-index"] #bottom-layer {
    top: calc((100vh - var(--example-header-height)) / 2);
    width: min(300px, 44vw);
    height: min(300px, 45vh);
    margin: 0;
    line-height: normal;
    display: grid;
    place-items: center;
    transform: translateY(-50%);
    font: 14px system-ui, sans-serif;
}

body[data-example="z-index"] #bottom-layer {
    transform: translate(-100%, -50%);
}

body[data-example="3d_cube"] .cube-3d {
    --cube-size: min(36vw, calc((100vh - var(--example-header-height)) * .48), 400px);
    top: calc((100vh - var(--example-header-height)) / 2);
}

body[data-example="3d_cube"] .cube-3d__container {
    width: var(--cube-size);
    height: var(--cube-size);
}

body[data-example="3d_cube"] .cube-3d__side_back { transform: translateZ(calc(var(--cube-size) / -2)); }
body[data-example="3d_cube"] .cube-3d__side_front { transform: translateZ(calc(var(--cube-size) / 2)); }
body[data-example="3d_cube"] .cube-3d__side_left { transform: translateX(calc(var(--cube-size) / -2)) rotateY(90deg); }
body[data-example="3d_cube"] .cube-3d__side_right { transform: translateX(calc(var(--cube-size) / 2)) rotateY(90deg); }
body[data-example="3d_cube"] .cube-3d__side_top { transform: translateY(calc(var(--cube-size) / -2)) rotateX(90deg); }
body[data-example="3d_cube"] .cube-3d__side_bottom { transform: translateY(calc(var(--cube-size) / 2)) rotateX(90deg); }
.example-paused .cube-3d__container { animation-play-state: paused; }


body[data-example="constructor"] { min-height: calc(440px + var(--example-header-height)); }
body[data-example="constructor"] .form__panel { top: 20px; }
body[data-example="constructor"] .no-support { top: 5px; }
body[data-example="constructor"] .code { left: 320px; right: 24px; bottom: calc(var(--example-header-height) + 12px); height: 210px; }
body[data-example="constructor"] .code__textarea { max-width: 520px; height: 150px; }

@media (max-width: 760px) {
    .example-header { flex-direction: column; align-items: stretch; gap: 6px; padding: 6px 12px max(6px, env(safe-area-inset-bottom)); }
    .example-brand { display: none; }
    .example-tools { max-width: none; align-self: stretch; justify-content: flex-start; }
    .example-navigation { flex: 1 1 160px; min-width: 0; }
    .example-playback label { display: none; }
    .example-header button,
    .example-header select,
    .example-step { min-height: 32px; }
    .example-step { min-width: 32px; }
    #example-picker { flex: 1; width: 0; min-width: 0; }
    .example-controls { max-width: 100%; justify-content: flex-start; }
    body[data-example="constructor"] .form__layer { position: relative; inset: auto; width: calc(100% - 32px); height: 260px; margin: 20px 16px; }
    body[data-example="constructor"] .form__panel { position: relative; top: auto; left: auto; width: fit-content; max-width: calc(100% - 32px); margin: 20px 16px; }
    body[data-example="constructor"] .code { position: relative; left: auto; right: auto; bottom: auto; margin: 20px 16px; }
    body[data-example="constructor"] .code__textarea { max-width: 100%; }
}

@media (max-height: 400px) {
    .example-header { max-height: 50vh; overflow-y: auto; }
}