/* Velocity look for the Kinetic docs: ink and paper, lavender and orange */

:root {
    --sidebar-width: 280px;
    --page-padding: 24px;
    --content-max-width: 780px;
    --menu-bar-height: 60px;
    --sans-font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
    --mono-font: "JetBrains Mono", ui-monospace, Consolas, monospace;
    --code-font-size: 0.875em;
    --radius: 12px;
    --radius-small: 8px;
}

.coal {
    --bg: #141216;
    --fg: #D9D4DE;
    --heading: #F5F2F7;
    --muted: #9C96A3;
    --hairline: #26232A;
    --surface: #1C1A1F;
    --surface-raised: #242128;
    --accent: #E2AC80;
    --accent-soft: #2A2224;
    --lavender: #DCD5E2;

    --sidebar-bg: #141216;
    --sidebar-fg: #A7A1AE;
    --sidebar-non-existant: #5E5964;
    --sidebar-active: var(--accent);
    --sidebar-spacer: var(--hairline);
    --scrollbar: #3A3640;

    --icons: #A7A1AE;
    --icons-hover: #F5F2F7;
    --links: var(--accent);
    --inline-code-color: var(--lavender);

    --theme-popup-bg: var(--surface-raised);
    --theme-popup-border: var(--surface-raised);
    --theme-hover: #2E2A33;

    --quote-bg: var(--surface);
    --quote-border: var(--surface);
    --warning-border: var(--accent);

    --table-border-color: var(--hairline);
    --table-header-bg: var(--surface);
    --table-alternate-bg: transparent;

    --searchbar-border-color: transparent;
    --searchbar-bg: var(--surface);
    --searchbar-fg: var(--heading);
    --searchbar-shadow-color: transparent;
    --searchresults-header-fg: var(--muted);
    --searchresults-border-color: var(--hairline);
    --searchresults-li-bg: var(--surface);
    --search-mark-bg: #5A4636;

    --hl-text: #DCD5E2;
    --hl-comment: #7D7784;
    --hl-keyword: #C9B8DA;
    --hl-string: #E2AC80;
    --hl-number: #EBC6A6;
    --hl-title: #F5F2F7;
    --hl-variable: #B9B0C3;

    --color-scheme: dark;
}

.light {
    --bg: #EEEBE5;
    --fg: #2E2B31;
    --heading: #1C1A1F;
    --muted: #6B6570;
    --hairline: #DCD7CE;
    --surface: #E5E1D9;
    --surface-raised: #F7F5F1;
    --accent: #9A4F1E;
    --accent-soft: #E6DBD0;
    --lavender: #DCD5E2;

    --sidebar-bg: #EEEBE5;
    --sidebar-fg: #5E5963;
    --sidebar-non-existant: #A29CA6;
    --sidebar-active: var(--accent);
    --sidebar-spacer: var(--hairline);
    --scrollbar: #CFC9C0;

    --icons: #5E5963;
    --icons-hover: #1C1A1F;
    --links: var(--accent);
    --inline-code-color: #3B3542;

    --theme-popup-bg: var(--surface-raised);
    --theme-popup-border: var(--surface-raised);
    --theme-hover: var(--surface);

    --quote-bg: var(--surface);
    --quote-border: var(--surface);
    --warning-border: var(--accent);

    --table-border-color: var(--hairline);
    --table-header-bg: var(--surface);
    --table-alternate-bg: transparent;

    --searchbar-border-color: transparent;
    --searchbar-bg: var(--surface);
    --searchbar-fg: var(--heading);
    --searchbar-shadow-color: transparent;
    --searchresults-header-fg: var(--muted);
    --searchresults-border-color: var(--hairline);
    --searchresults-li-bg: var(--surface);
    --search-mark-bg: #EBCFB6;

    --hl-text: #2E2B31;
    --hl-comment: #857E8A;
    --hl-keyword: #6A4C8C;
    --hl-string: #9A4F1E;
    --hl-number: #8A5A2E;
    --hl-title: #1C1A1F;
    --hl-variable: #4E4856;

    --color-scheme: light;
}

/* base type */

html {
    font-family: var(--sans-font);
    font-feature-settings: "cv11", "ss01";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-size: 1.6rem;
    line-height: 1.7;
}

::selection {
    background: var(--search-mark-bg);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 6px;
}

.content {
    padding: 8px 0 96px;
}

.content main {
    padding-top: 40px;
}

.content p,
.content ol,
.content ul {
    line-height: 1.7;
}

.content li + li {
    margin-top: 0.35em;
}

.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6 {
    color: var(--heading);
    font-weight: 600;
    letter-spacing: -0.015em;
    line-height: 1.25;
}

.content h1 {
    font-size: 3.6rem;
    letter-spacing: -0.025em;
    margin: 0 0 2.4rem;
}

.content h2 {
    font-size: 2.4rem;
    margin: 5.6rem 0 1.6rem;
}

.content h3 {
    font-size: 1.9rem;
    margin: 4rem 0 1.2rem;
}

.content h4,
.content h5,
.content h6 {
    font-size: 1.6rem;
    margin: 3.2rem 0 0.8rem;
}

.content .header:link,
.content .header:visited {
    color: inherit;
}

h1:target::before,
h2:target::before,
h3:target::before,
h4:target::before,
h5:target::before,
h6:target::before {
    content: none;
}

.content a {
    color: var(--links);
    text-decoration: none;
}

.content a:hover {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.content strong {
    color: var(--heading);
    font-weight: 600;
}

.content hr {
    border: 0;
    height: 1px;
    background: var(--hairline);
    margin: 4.8rem 0;
}

.content img {
    border-radius: var(--radius);
}

/* code */

code {
    font-variant-ligatures: none;
}

:not(pre) > code,
:not(pre) > .hljs,
:not(pre):not(a) > .hljs {
    color: var(--inline-code-color);
    background: var(--surface);
    padding: 0.15em 0.4em;
    border-radius: 6px;
    font-size: 0.85em;
    overflow-wrap: break-word;
}

.content a > code,
a > .hljs {
    color: var(--links);
}

pre {
    margin: 2rem 0;
    border-radius: var(--radius);
    background: var(--surface);
}

pre > code,
pre > code.hljs {
    padding: 16px 20px;
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--hl-text);
    font-size: 1.3rem;
    line-height: 1.65;
    /* wrap instead of scrolling sideways; long tokens such as URLs break only when they must */
    white-space: pre-wrap;
    overflow-wrap: break-word;
    overflow-x: visible;
}

@supports (text-indent: 2ch hanging each-line) {
    pre > code,
    pre > code.hljs {
        text-indent: 2ch hanging each-line;
    }
}

pre > .buttons {
    top: 8px;
    right: 8px;
    padding: 0;
}

pre > .buttons button {
    margin: 0;
    padding: 4px 8px;
    border: 0;
    border-radius: var(--radius-small);
    background: var(--surface-raised);
    color: var(--muted);
    font-size: 1.3rem;
}

pre > .buttons :hover {
    color: var(--heading);
    background-color: var(--theme-hover);
}

.hljs { background: var(--surface); color: var(--hl-text); }
html .hljs-comment,
html .hljs-quote { color: var(--hl-comment); font-style: normal; }
html .hljs-keyword,
html .hljs-selector-tag,
html .hljs-meta,
html .hljs-built_in,
html .hljs-builtin-name { color: var(--hl-keyword); }
html .hljs-string,
html .hljs-symbol,
html .hljs-bullet,
html .hljs-addition { color: var(--hl-string); }
html .hljs-number,
html .hljs-literal,
html .hljs-type,
html .hljs-params { color: var(--hl-number); }
html .hljs-title,
html .hljs-section,
html .hljs-name { color: var(--hl-title); font-weight: 400; }
html .hljs-variable,
html .hljs-template-variable,
html .hljs-attribute,
html .hljs-attr,
html .hljs-tag,
html .hljs-regexp,
html .hljs-link,
html .hljs-selector-id,
html .hljs-selector-class,
html .hljs-deletion { color: var(--hl-variable); }

/* tables */

.table-wrapper {
    margin: 2.4rem 0;
    border-radius: var(--radius);
    background: var(--bg);
    box-shadow: inset 0 0 0 1px var(--hairline);
}

table {
    width: 100%;
    margin: 0;
    border-collapse: collapse;
    font-size: 1.4rem;
    line-height: 1.55;
    font-variant-numeric: tabular-nums;
}

table thead {
    background: var(--table-header-bg);
    border: 0;
}

table thead th {
    padding: 10px 14px;
    color: var(--heading);
    font-weight: 600;
    text-align: start;
    white-space: nowrap;
}

table thead th:first-child { border-top-left-radius: var(--radius); }
table thead th:last-child { border-top-right-radius: var(--radius); }

table td {
    padding: 10px 14px;
    border: 0;
    border-top: 1px solid var(--hairline);
    vertical-align: top;
}

table tbody tr:nth-child(2n) {
    background: transparent;
}

table code {
    white-space: normal;
}

/* flag and file names in the key column read badly split at a hyphen */
table td:first-child code {
    white-space: nowrap;
}

/* quotes and notes */

blockquote {
    margin: 2.4rem 0;
    padding: 4px 20px;
    border: 0;
    border-radius: var(--radius);
    background: var(--quote-bg);
    color: var(--fg);
}

kbd {
    padding: 2px 6px;
    border: 0;
    border-radius: 6px;
    box-shadow: none;
    background: var(--surface-raised);
    color: var(--muted);
    font-family: var(--sans-font);
    font-size: 1.2rem;
    line-height: 1.4;
}

/* diagrams follow the system scheme, so give them a card when the page theme differs */

@media (prefers-color-scheme: light) {
    .coal .content picture img {
        background: #EEEBE5;
        padding: 12px;
        box-sizing: border-box;
    }
}

@media (prefers-color-scheme: dark) {
    .light .content picture img {
        background: #1C1A1F;
        padding: 12px;
        box-sizing: border-box;
    }
}

/* menu bar */

#menu-bar {
    z-index: 200;
    align-items: center;
    height: var(--menu-bar-height);
    flex-wrap: nowrap;
    padding: 0 8px;
    border-block-end: 1px solid var(--hairline);
    background: var(--bg);
}

#menu-bar.bordered {
    border-block-end-color: var(--hairline);
}

#menu-bar i,
#menu-bar .icon-button {
    line-height: 36px;
    padding: 0;
    transition: color 0.15s;
}

.icon-button,
.right-buttons > a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-small);
    color: var(--icons);
    font-size: 1.6rem;
}

.icon-button:hover,
.right-buttons > a:hover,
#menu-bar .icon-button:hover i,
.right-buttons > a:hover i {
    color: var(--icons-hover);
}

.icon-button:hover,
.right-buttons > a:hover {
    background: var(--surface);
}

.left-buttons,
.right-buttons {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
}

.left-buttons {
    flex: 1;
    min-width: 0;
}

.right-buttons {
    flex: 1;
    justify-content: flex-end;
}

.menu-title {
    display: inline-flex;
    align-items: center;
    flex: none;
    margin-inline-start: 8px;
    line-height: 1;
    font-size: 0;
}

.lockup {
    height: 36px;
    width: auto;
}

.light .lockup-dark,
.coal .lockup-light {
    display: none;
}

.search-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex: 0 1 380px;
    height: 38px;
    margin: 0 16px;
    padding: 0 8px 0 14px;
    border: 0;
    border-radius: var(--radius-small);
    background: var(--surface);
    color: var(--muted);
    font: inherit;
    font-size: 1.4rem;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.search-button:hover {
    background: var(--surface-raised);
    color: var(--fg);
}

#menu-bar .search-button i {
    line-height: 1;
    padding: 0;
    font-size: 1.3rem;
}

.search-label {
    flex: 1;
    text-align: start;
}

.search-button kbd {
    background: var(--bg);
}

.theme-popup {
    left: auto;
    right: 64px;
    top: calc(var(--menu-bar-height) - 6px);
    min-width: 140px;
    padding: 6px;
    border: 0;
    border-radius: var(--radius);
    background: var(--theme-popup-bg);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
    font-size: 1.4rem;
}

.theme-popup .theme {
    padding: 6px 12px 6px 28px;
    line-height: 1.5;
    border-radius: var(--radius-small);
    color: var(--fg);
}

.theme-popup .theme:hover {
    background: var(--theme-hover);
}

.theme-selected::before {
    content: "✓";
    color: var(--accent);
    margin-inline-start: -18px;
    width: 18px;
}

/* search opens as a panel over the page; the wide shadow dims the page behind it */

#search-wrapper {
    position: fixed;
    z-index: 300;
    top: 72px;
    left: 50%;
    transform: translateX(-50%);
    width: min(680px, 100vw - 24px);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 10px;
    box-sizing: border-box;
    border-radius: 16px;
    background: var(--surface-raised);
    box-shadow: 0 0 0 100vmax rgba(10, 8, 12, 0.55), 0 24px 48px rgba(0, 0, 0, 0.35);
}

.searchbar-outer {
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: none;
}

#searchbar::-webkit-search-cancel-button {
    display: none;
}

#search-close {
    flex: none;
    width: 40px;
    height: 40px;
    color: var(--muted);
}

#search-close:hover {
    color: var(--heading);
    background: var(--theme-hover);
}

#searchbar {
    margin: 0;
    padding: 12px 16px;
    border: 0;
    border-radius: var(--radius);
    background: var(--searchbar-bg);
    color: var(--searchbar-fg);
    font: inherit;
    font-size: 1.7rem;
    box-sizing: border-box;
}

#searchbar::placeholder {
    color: var(--muted);
}

#searchbar:focus,
#searchbar.active {
    box-shadow: 0 0 0 1.5px var(--accent);
    outline: 0;
}

.searchresults-outer {
    max-width: none;
    margin: 0;
    border: 0;
}

.searchresults-header {
    padding: 14px 16px 6px;
    color: var(--muted);
    font-size: 1.4rem;
    font-weight: 500;
}

ul#searchresults {
    margin: 0;
    padding: 0;
}

ul#searchresults li {
    margin: 2px 0;
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 1.5rem;
}

ul#searchresults li.focus,
ul#searchresults li:hover {
    background: var(--theme-hover);
}

ul#searchresults a {
    color: var(--heading);
    font-weight: 600;
}

ul#searchresults span.teaser {
    color: var(--muted);
    font-size: 1.4rem;
    line-height: 1.6;
}

ul#searchresults span.teaser em {
    color: var(--fg);
    font-style: normal;
    font-weight: 600;
}

mark {
    background: var(--search-mark-bg);
    color: inherit;
    border-radius: 3px;
}

/* sidebar */

.sidebar {
    font-size: 1.45rem;
    border-inline-end: 1px solid var(--hairline);
}

.sidebar .sidebar-scrollbox {
    padding: 24px 16px 48px;
}

.sidebar .sidebar-scrollbox {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar) transparent;
}

.chapter {
    line-height: 1.5;
}

.chapter li.chapter-item {
    margin: 1px 0;
    line-height: 1.5;
}

.chapter li a {
    flex: 1;
    padding: 6px 10px;
    border-radius: var(--radius-small);
    color: var(--sidebar-fg);
    transition: background 0.15s, color 0.15s;
}

.chapter li a:hover {
    color: var(--heading);
    background: var(--surface);
}

.chapter li a.active {
    color: var(--sidebar-active);
    background: var(--accent-soft);
    font-weight: 500;
}

.chapter ol.section {
    padding-inline-start: 12px;
}

.chapter li.part-title {
    margin: 28px 10px 6px;
    color: var(--heading);
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.sidebar-resize-handle .sidebar-resize-indicator {
    display: none;
}

/* previous and next */

.nav-wide-wrapper {
    display: none;
}

.nav-wrapper {
    display: flex;
    gap: 16px;
    max-width: var(--content-max-width);
    margin: 72px auto 0;
    padding-top: 32px;
    border-top: 1px solid var(--hairline);
}

.nav-wrapper > div {
    display: none;
}

.mobile-nav-chapters {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 2px;
    width: auto;
    padding: 16px 20px;
    border-radius: var(--radius);
    background: var(--surface);
    font-size: 1.6rem;
    text-align: start;
    text-decoration: none;
    transition: background 0.15s;
}

.mobile-nav-chapters:hover {
    background: var(--surface-raised);
    text-decoration: none;
}

.mobile-nav-chapters.next {
    text-align: end;
    margin-inline-start: auto;
}

.mobile-nav-chapters .nav-label {
    color: var(--muted);
    font-size: 1.3rem;
}

.mobile-nav-chapters .nav-title {
    color: var(--heading);
    font-weight: 600;
}

/* phone */

@media only screen and (max-width: 720px) {
    :root {
        --page-padding: 16px;
        --menu-bar-height: 56px;
    }

    .right-buttons {
        flex: none;
    }

    .search-button {
        flex: none;
        width: 36px;
        height: 36px;
        padding: 0;
        justify-content: center;
        margin: 0;
        background: transparent;
        color: var(--icons);
    }

    .search-label,
    .search-button kbd,
    .right-buttons > a[href$="print.html"] {
        display: none;
    }

    .content main {
        padding-top: 24px;
    }

    .content h1 {
        font-size: 2.8rem;
    }

    .content h2 {
        font-size: 2.1rem;
        margin-top: 4.4rem;
    }

    pre > code,
    pre > code.hljs {
        padding: 14px 16px;
        font-size: 1.25rem;
    }

    /* terminal output and aligned columns keep their shape and scroll on a phone */
    pre > code.language-text {
        white-space: pre;
        overflow-x: auto;
    }

    .content ul,
    .content ol {
        padding-inline-start: 22px;
    }

    .nav-wrapper {
        flex-direction: column;
        gap: 10px;
    }

    .theme-popup {
        right: 48px;
    }

    #search-wrapper {
        top: 64px;
        max-height: calc(100vh - 80px);
    }
}