/*
 * ProtoCore - Instrument Panel
 * Copyright (C) 2026 Douglas Quigg (dstroy0) <dquigg123@gmail.com>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * The subject is a deterministic, zero-heap, OSI-layered network stack. The reader is an
 * engineer deciding whether it fits a RAM budget and matches a spec. So this reads as an
 * instrument panel rather than terminal nostalgia: a cool slate case, neutral prose, and
 * color that MEANS something instead of one green doing every job at once.
 *
 *   cyan   interactive - links and controls. Squirty's own color, so mascot and UI agree.
 *   green  a state, not a mood: ok / pass / enabled.
 *   amber  a cost or a caution: warnings, budgets, deltas.
 *   rose   an error or a removal.
 *
 * Mono is kept where mono earns its place - code, flags, identifiers, numeric tables - and
 * dropped for prose, which was setting ~110 characters per line in a monospace face.
 *
 * Squirty's own block is carried over unchanged at the end of this file.
 */

/* ====================================================================== */
/* Tokens                                                                 */
/* ====================================================================== */
html {
    --pc-panel: #0b0f14; /* the case */
    --pc-panel-2: #121924; /* raised: code wells, table headers */
    --pc-panel-3: #0d131b; /* recessed: nav, footer */
    --pc-rule: #1e2836; /* hairlines */
    --pc-rule-2: #2b3846; /* emphasized hairlines */
    --pc-text: #c8d3de; /* body prose */
    --pc-bright: #eaf1f8; /* headings, emphasis */
    --pc-dim: #808f9e; /* captions, metadata, inactive */
    --pc-cyan: #00e5ff; /* interactive */
    --pc-cyan-dim: #00a3b8;
    --pc-signal: #3ecf7a; /* state: ok / pass / enabled */
    --pc-amber: #e8b04b; /* cost / caution */
    --pc-rose: #f2557a; /* error / removed */
    --pc-violet: #b78af0; /* types, keywords */

    --pc-mono: "Fira Code", "Cascadia Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --pc-sans:
        ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;

    /* Sizing targets a normal display first - 1440/1920 and phones - with an ultrawide
       simply getting a centred column rather than stretched lines. Both are min() against a
       percentage so nothing overflows a narrow viewport. */
    --pc-prose: min(80ch, 100%);
    --pc-track: min(860px, 96%); /* sized to the text; data breaks out below */
    --pc-bleed: min(1340px, calc(100vw - 340px)); /* left rule -> right edge of the content area */
    --pc-radius: 6px;

    /* Doxygen's own variables, mapped onto the palette. */
    --primary-color: var(--pc-cyan);
    --primary-dark-color: var(--pc-cyan-dim);
    --primary-light-color: #7df3ff;
    --secondary-color: var(--pc-signal);
    --secondary-dark-color: #2a9d5c;
    --secondary-light-color: #6fe39f;
    --page-background-color: var(--pc-panel);
    --page-foreground-color: var(--pc-text);
    --page-secondary-foreground-color: var(--pc-dim);
    --separator-color: var(--pc-rule);
    --border-color: var(--pc-rule);
    --header-background: var(--pc-panel);
    --header-foreground: var(--pc-text);
    --nav-background: var(--pc-panel-3);
    --nav-foreground: var(--pc-text);
    --nav-accent: var(--pc-cyan);
    --code-background: var(--pc-panel-2);
    --code-foreground: #dde6f0;
    --memdef-background: #0e141d;
    --memdef-title-background: var(--pc-panel-2);

    /* These were all one green: a warning was indistinguishable from a note. */
    --warning-color: var(--pc-amber);
    --note-color: var(--pc-cyan);
    --attention-color: var(--pc-rose);
    --deprecated-color: var(--pc-dim);
    --bug-color: var(--pc-rose);
    --todo-color: var(--pc-signal);
}

/* Border-box everywhere. #titlearea was 100% wide PLUS 36px of padding, which pushed the
   page 36px past the viewport and gave every screen a horizontal scrollbar. */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* ====================================================================== */
/* Type                                                                   */
/* ====================================================================== */
body,
html {
    background: var(--pc-panel);
    color: var(--pc-text);
    font-family: var(--pc-sans);
    font-size: 15px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* Data stays mono. Prose does not. */
code,
kbd,
samp,
pre,
tt,
.fragment,
div.line,
.lineno,
.memname,
.memproto,
.paramname,
.paramtype,
span.mlabel,
table.memberdecls td,
table.doxtable th,
table.doxtable td,
table.markdownTable th,
table.markdownTable td,
#nav-tree,
#nav-tree a,
.navpath li,
.navpath a,
#projectname,
#MSearchField,
h1,
h2,
h3,
h4,
h5,
h6,
div.header .title,
.memtitle,
summary {
    font-family: var(--pc-mono);
}

h1,
h2,
h3,
h4,
div.header .title,
.memtitle {
    color: var(--pc-bright);
    font-weight: 600;
    letter-spacing: -0.012em;
    line-height: 1.25;
}
div.header .title,
h1 {
    font-size: 1.55rem;
    margin: 0 0 0.6em;
}
h2 {
    font-size: 1.2rem;
    margin: 2.2em 0 0.7em;
    padding-bottom: 0.35em;
    border-bottom: 1px solid var(--pc-rule);
}
h3 {
    font-size: 1.02rem;
    margin: 1.8em 0 0.5em;
    color: #d7e2ee;
}

/* An eyebrow encodes the layer a section belongs to - structure, not ornament. */
.pc-eyebrow {
    display: block;
    font-family: var(--pc-mono);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--pc-dim);
    margin-bottom: 0.35em;
}

a {
    color: var(--pc-cyan);
    text-decoration: none;
    border-bottom: 1px solid color-mix(in srgb, var(--pc-cyan) 28%, transparent);
    transition:
        color 0.12s ease,
        border-color 0.12s ease;
}
a:hover {
    color: #7df3ff;
    border-bottom-color: var(--pc-cyan);
}
a:focus-visible,
summary:focus-visible,
button:focus-visible {
    outline: 2px solid var(--pc-cyan);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ====================================================================== */
/* Shell: header, nav, content track                                      */
/* ====================================================================== */
#titlearea {
    background: var(--pc-panel);
    border-bottom: 1px solid var(--pc-rule);
    padding: 10px 18px;
}
#projectname {
    color: var(--pc-bright);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}
#projectnumber {
    color: var(--pc-dim);
    font-size: 0.75rem;
    font-weight: 400;
}
#projectbrief {
    color: var(--pc-dim);
    font-family: var(--pc-sans);
    font-size: 0.82rem;
}

/* ---------------------------------------------------------------------- */
/* Sidebar                                                                  */
/* ---------------------------------------------------------------------- */
#side-nav {
    background: var(--pc-panel-3);
    border-right: 1px solid var(--pc-rule);
}
#nav-tree {
    background: transparent;
    padding: 8px 0 24px;
    font-size: 12.5px;
}
#nav-tree-contents > ul {
    margin: 0;
    padding: 0;
}

/* The row is the box that gets clamped: Doxygen sizes the anchor from JS, so a clamp on
   the anchor alone did nothing and labels sheared mid-word. */
/* Doxygen's row is `a` (icon) followed by `span.label` (the text). Making the row a flex
   container and letting the ANCHOR grow pushed every label to the right edge - the clamp
   has to sit on .label, and the row stays a normal block. */
#nav-tree .item {
    padding: 1px 10px 1px 0;
    line-height: 1.9;
    border-left: 2px solid transparent;
    white-space: nowrap;
    overflow: hidden;
}
#nav-tree .item > a {
    border-bottom: none;
    padding: 0;
}
#nav-tree .label {
    display: inline-block;
    max-width: calc(100% - 26px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: bottom;
}

/* Indent guides: depth you can see, rather than depth you have to count. */
#nav-tree ul ul {
    margin: 0;
    padding-left: 13px;
    border-left: 1px solid var(--pc-rule);
}

/* Top-level entries carry more weight than their children - that is the category. */
#nav-tree-contents > ul > li > .item > a {
    color: #dbe5f0;
    font-weight: 600;
}
#nav-tree ul ul .item > a {
    color: #9fadbb;
    font-weight: 400;
}

#nav-tree .item:hover {
    background: color-mix(in srgb, var(--pc-cyan) 7%, transparent);
}
#nav-tree .item:hover > a {
    color: var(--pc-cyan);
}
#nav-tree .item.selected,
#nav-tree .selected {
    background: color-mix(in srgb, var(--pc-cyan) 13%, transparent);
    border-left-color: var(--pc-cyan);
}
#nav-tree .selected > a,
#nav-tree .selected a {
    color: var(--pc-bright);
    font-weight: 600;
}

/* Disclosure arrows: quiet until you are on the row. */
#nav-tree .arrow {
    color: var(--pc-dim);
    opacity: 0.65;
    flex: none;
    width: 12px;
    text-align: center;
    transition: opacity 0.12s ease;
}
#nav-tree .item:hover .arrow {
    opacity: 1;
    color: var(--pc-cyan);
}

/* ---------------------------------------------------------------------- */
/* Title relocated into the navbar by footer.html                           */
/* ---------------------------------------------------------------------- */
.navbar-project-title {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    padding: 0 16px 0 4px;
    margin-right: 8px;
    line-height: 30px;
    font-family: var(--pc-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--pc-bright);
    border-right: 1px solid var(--pc-rule-2);
    vertical-align: middle;
}
.navbar-project-title .navbar-version {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--pc-dim);
}
.navbar-libname-link {
    color: inherit;
    border-bottom: none;
    pointer-events: auto;
}
.navbar-libname-link:hover {
    color: var(--pc-cyan);
}
/* Doxygen's own title block is empty once the JS has moved it out. */
#titlearea:empty,
#projectrow:empty {
    display: none;
}

/* Content track: prose keeps a readable measure, data keeps the width. */
#doc-content {
    background: var(--pc-panel);
}
/* Left-aligned, not centred: wide data has to start on the same rule as the prose, and it
   cannot do that if the text column floats in the middle of the content area. */
div.contents,
div.header {
    max-width: var(--pc-track);
    margin-inline: 0 auto;
    padding-inline: clamp(16px, 3vw, 48px);
    box-sizing: border-box;
}
div.contents p,
div.contents li,
div.textblock > p,
div.textblock > ul,
div.textblock > ol,
dl.note,
dl.warning,
dl.attention,
dl.bug,
dl.todo {
    max-width: var(--pc-prose);
}
/* Data breaks OUT of the text column and centres on the content area. A child given only a
   larger width would overflow right, hence the margin/transform pair. */
div.contents > table,
div.contents .fragment,
div.contents > .memitem,
div.contents > details,
div.contents .pc-examples,
div.contents > .textblock > table,
div.contents > .textblock > .fragment,
div.contents > .textblock > details,
div.contents > .textblock > .pc-examples {
    width: var(--pc-bleed);
    max-width: none;
    margin-left: 0; /* same left rule as the prose; the extra width goes right */
}
div.contents img {
    max-width: 100%;
    height: auto;
}

/* ====================================================================== */
/* Code                                                                   */
/* ====================================================================== */
div.fragment,
pre.fragment {
    background: var(--pc-panel-2);
    border: 1px solid var(--pc-rule);
    border-left: 2px solid var(--pc-cyan-dim);
    border-radius: var(--pc-radius);
    padding: 12px 14px;
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.55;
}
div.line {
    color: #dde6f0;
}
.lineno {
    color: #4a5666;
}
span.keyword,
span.keywordtype,
span.keywordflow {
    color: var(--pc-violet);
}
span.comment {
    color: #6b7a8a;
    font-style: italic;
}
span.stringliteral {
    color: var(--pc-signal);
}
span.preprocessor {
    color: var(--pc-amber);
}
code,
tt {
    background: color-mix(in srgb, var(--pc-panel-2) 80%, transparent);
    border: 1px solid var(--pc-rule);
    border-radius: 4px;
    padding: 0.08em 0.36em;
    font-size: 0.9em;
    color: #dbe5f0;
}

/* ====================================================================== */
/* Tables                                                                 */
/* ====================================================================== */
table.doxtable,
table.markdownTable {
    border-collapse: collapse;
    width: 100%;
    margin: 1.2em 0;
    font-size: 13px;
}
table.doxtable th,
table.markdownTable th {
    background: var(--pc-panel-2);
    color: var(--pc-bright);
    text-align: left;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-size: 11.5px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--pc-rule-2);
}
table.doxtable td,
table.markdownTable td {
    padding: 7px 10px;
    border-bottom: 1px solid var(--pc-rule);
    color: var(--pc-text);
}
table.doxtable tr:hover td,
table.markdownTable tr:hover td {
    background: color-mix(in srgb, var(--pc-cyan) 5%, transparent);
}

/* ====================================================================== */
/* Admonitions - each one now looks like what it is                       */
/* ====================================================================== */
dl.note,
dl.warning,
dl.attention,
dl.bug,
dl.todo,
dl.deprecated {
    border-left: 3px solid var(--pc-rule-2);
    background: color-mix(in srgb, var(--pc-panel-2) 60%, transparent);
    border-radius: 0 var(--pc-radius) var(--pc-radius) 0;
    padding: 10px 14px;
    margin: 1.2em 0;
}
dl.note {
    border-left-color: var(--pc-cyan);
}
dl.warning {
    border-left-color: var(--pc-amber);
}
dl.attention,
dl.bug {
    border-left-color: var(--pc-rose);
}
dl.todo {
    border-left-color: var(--pc-signal);
}
dl.deprecated {
    border-left-color: var(--pc-dim);
}
dl.note dt,
dl.warning dt,
dl.attention dt,
dl.bug dt,
dl.todo dt {
    font-family: var(--pc-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
dl.note dt {
    color: var(--pc-cyan);
}
dl.warning dt {
    color: var(--pc-amber);
}
dl.attention dt,
dl.bug dt {
    color: var(--pc-rose);
}
dl.todo dt {
    color: var(--pc-signal);
}

/* ====================================================================== */
/* Member documentation                                                   */
/* ====================================================================== */
.memitem {
    background: var(--memdef-background);
    border: 1px solid var(--pc-rule);
    border-radius: var(--pc-radius);
    margin: 1.2em 0;
    overflow: hidden;
}
.memproto {
    background: var(--memdef-title-background);
    border-bottom: 1px solid var(--pc-rule);
    padding: 9px 12px;
}
.memname {
    color: var(--pc-bright);
}
.memdoc {
    padding: 12px;
}
.paramname {
    color: var(--pc-amber);
    font-style: normal;
}
span.mlabel {
    background: color-mix(in srgb, var(--pc-cyan) 14%, transparent);
    border: 1px solid var(--pc-cyan-dim);
    color: var(--pc-cyan);
    border-radius: 3px;
    padding: 1px 6px;
    font-size: 10.5px;
}

/* ====================================================================== */
/* Collapsible sections                                                   */
/* ====================================================================== */
details {
    background: var(--pc-panel-3);
    border: 1px solid var(--pc-rule);
    border-radius: var(--pc-radius);
    margin: 1.2em 0;
    overflow: hidden;
}
details > summary {
    cursor: pointer;
    padding: 9px 12px;
    background: var(--pc-panel-2);
    color: var(--pc-bright);
    font-size: 0.9rem;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}
details > summary::-webkit-details-marker {
    display: none;
}
/* A disclosure caret that points where it is going. */
details > summary::before {
    content: "";
    width: 0;
    height: 0;
    border-left: 5px solid var(--pc-cyan);
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
    transition: transform 0.15s ease;
    flex: none;
}
details[open] > summary::before {
    transform: rotate(90deg);
}
details > summary:hover {
    background: color-mix(in srgb, var(--pc-cyan) 8%, var(--pc-panel-2));
}
details > *:not(summary) {
    padding-inline: 12px;
}
details > summary + * {
    padding-top: 10px;
}

/*
 * The reveal. This used to wrap every text node in one <span> per character and drive
 * them from requestAnimationFrame - 259 elements for 506 characters, and a 3000-char cap
 * that meant 6 of 9 sections on the front page got no animation at all. Now it is one
 * GPU-composited mask sweep on the container: no DOM churn, no cap, same idea.
 */
@keyframes pc-reveal {
    from {
        -webkit-mask-position: 0 0;
        mask-position: 0 0;
    }
    to {
        -webkit-mask-position: -200% 0;
        mask-position: -200% 0;
    }
}
details[open] > .pc-reveal {
    -webkit-mask-image: linear-gradient(90deg, #000 25%, rgba(0, 0, 0, 0.35) 50%, #000 75%);
    mask-image: linear-gradient(90deg, #000 25%, rgba(0, 0, 0, 0.35) 50%, #000 75%);
    -webkit-mask-size: 200% 100%;
    mask-size: 200% 100%;
    animation: pc-reveal 0.5s ease-out 1;
    will-change: mask-position;
}

/* ====================================================================== */
/* Examples index: a real tree, grouped by OSI layer                      */
/* ====================================================================== */
.pc-examples {
    margin: 1.4em 0;
}
.pc-examples > details {
    margin: 0 0 -1px;
    border-radius: 0;
}
.pc-examples > details:first-of-type {
    border-radius: var(--pc-radius) var(--pc-radius) 0 0;
}
.pc-examples > details:last-of-type {
    border-radius: 0 0 var(--pc-radius) var(--pc-radius);
}
/* Doxygen strips <span> inside <summary>, so the badge is plain text with separators.
   The summary still reads as a label because of the mono face and the caret. */
.pc-examples > details > summary {
    font-size: 0.86rem;
    letter-spacing: 0.02em;
    color: #dbe5f0;
}
.pc-examples .pc-desc {
    color: var(--pc-dim);
    font-size: 0.85rem;
    margin: 0 0 0.7em;
    max-width: var(--pc-prose);
}
.pc-examples ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 2px 10px;
    margin: 0;
    padding: 0 0 12px;
}
.pc-examples ul li {
    margin: 0;
    max-width: none;
}
.pc-examples ul a {
    display: block;
    padding: 4px 8px;
    border-radius: 4px;
    border-bottom: none;
    font-family: var(--pc-mono);
    font-size: 12.5px;
    color: var(--pc-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.pc-examples ul a:hover {
    background: color-mix(in srgb, var(--pc-cyan) 12%, transparent);
    color: var(--pc-cyan);
}

/* ====================================================================== */
/* Search, tabs, footer                                                   */
/* ====================================================================== */
#MSearchBox {
    background: var(--pc-panel-2);
    border: 1px solid var(--pc-rule-2);
    border-radius: var(--pc-radius);
}
#MSearchField {
    background: transparent;
    color: var(--pc-text);
    font-size: 12.5px;
}
.tablist a {
    color: var(--pc-dim);
    border-bottom: none;
}
.tablist li.current a {
    color: var(--pc-cyan);
}
.navpath {
    background: var(--pc-panel-3);
    border-top: 1px solid var(--pc-rule);
}
.navpath li,
.navpath a {
    color: var(--pc-dim);
    font-size: 11.5px;
}
address.footer,
.footer {
    color: var(--pc-dim);
    font-size: 11.5px;
}

/* Scrollbars: part of the case, not a default. */
::-webkit-scrollbar {
    width: 11px;
    height: 11px;
}
::-webkit-scrollbar-track {
    background: var(--pc-panel-3);
}
::-webkit-scrollbar-thumb {
    background: var(--pc-rule-2);
    border-radius: 6px;
    border: 2px solid var(--pc-panel-3);
}
::-webkit-scrollbar-thumb:hover {
    background: #3c4d5f;
}

/* ====================================================================== */
/* Quality floor                                                          */
/* ====================================================================== */
/* Phones and small tablets. Doxygen collapses its own sidebar below its breakpoint; this
   makes what is left actually readable rather than merely present. */
@media (max-width: 850px) {
    body,
    html {
        font-size: 15px;
        line-height: 1.6;
    }
    div.contents,
    div.header {
        padding-inline: 14px;
        max-width: 100%;
    }
    h1,
    div.header .title {
        font-size: 1.3rem;
    }
    h2 {
        font-size: 1.08rem;
        margin-top: 1.6em;
    }
    /* The treeview sidebar is 260px of a 426px screen, leaving 160px of content - Doxygen
       sizes it from resizable.js and never releases it. Inline styles are why this needs
       !important; the hamburger menu is the navigation at this width. */
    #side-nav {
        display: none !important;
    }
    #doc-content {
        margin-left: 0 !important;
        width: 100% !important;
        height: auto !important;
        overflow: visible !important;
    }

    /* No sidebar to subtract at this width, and no room to break out of the column. */
    div.contents > table,
    div.contents .fragment,
    div.contents > .memitem,
    div.contents > details,
    div.contents .pc-examples,
    div.contents > .textblock > table,
    div.contents > .textblock > .fragment,
    div.contents > .textblock > details,
    div.contents > .textblock > .pc-examples {
        width: 100%;
        margin-left: 0;
    }

    /* Wide tables and long code lines are what force a narrow page to scroll sideways.
       Let them scroll inside their own box instead of dragging the page with them. */
    div.contents table,
    div.fragment,
    pre.fragment {
        display: block;
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .pc-examples ul {
        grid-template-columns: 1fr 1fr;
    }
    details > summary {
        padding: 10px;
    }
}

@media (max-width: 520px) {
    .pc-examples ul {
        grid-template-columns: 1fr;
    }
    div.contents,
    div.header {
        padding-inline: 10px;
    }
    body,
    html {
        font-size: 14.5px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
    details[open] > .pc-reveal {
        -webkit-mask-image: none;
        mask-image: none;
    }
}

/* ======================================================================
 * Squirty - carried over unchanged.
 *
 * His artwork, animation and controls are byte-for-byte the original. The only thing
 * that moved is his behaviour, in footer.html: he used to drift across body text and
 * sit on top of it while you were reading.
 * ====================================================================== */

/* ---- Cute Pixel Squid Animation ------------------------------------ */
#squid-container {
    position: fixed;
    width: 37px;
    height: 37px;
    z-index: 10000;
    cursor: pointer;
    pointer-events: auto;
    will-change: left, top, transform;
    transition: none !important;
}

#squid-container * {
    transition: none !important;
}

.squid-svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 3px rgba(0, 229, 255, 0.7));
}

/* Pixel Tentacle wiggling keyframes with discrete step timing */
@keyframes pixel-wiggle-left {
    0%,
    100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(-1px, 0);
    }
}
@keyframes pixel-wiggle-right {
    0%,
    100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(1px, 0);
    }
}

.pixel-tentacle-1 {
    animation: pixel-wiggle-left 0.8s steps(2) infinite;
    transform-origin: 5px 12px;
}
.pixel-tentacle-2 {
    animation: pixel-wiggle-left 0.6s steps(2) infinite;
    transform-origin: 7px 12px;
}
.pixel-tentacle-3 {
    animation: pixel-wiggle-right 0.6s steps(2) infinite;
    transform-origin: 8px 12px;
}
.pixel-tentacle-4 {
    animation: pixel-wiggle-right 0.8s steps(2) infinite;
    transform-origin: 10px 12px;
}

/* Mantle fins / wings: an undulating wave ripple (rotate + skew through a
   sine-ish cycle), not a mechanical back-and-forth tilt. Each fin's hinge is
   set inline on the group in 64-grid coordinates. */
@keyframes squid-fin-flap-l {
    0% {
        transform: rotate(9deg) skewY(0deg);
    }
    25% {
        transform: rotate(3deg) skewY(7deg);
    }
    50% {
        transform: rotate(-7deg) skewY(0deg);
    }
    75% {
        transform: rotate(1deg) skewY(-7deg);
    }
    100% {
        transform: rotate(9deg) skewY(0deg);
    }
}
@keyframes squid-fin-flap-r {
    0% {
        transform: rotate(-9deg) skewY(0deg);
    }
    25% {
        transform: rotate(-3deg) skewY(-7deg);
    }
    50% {
        transform: rotate(7deg) skewY(0deg);
    }
    75% {
        transform: rotate(-1deg) skewY(7deg);
    }
    100% {
        transform: rotate(-9deg) skewY(0deg);
    }
}
.squid-fin-left {
    animation: squid-fin-flap-l 1.15s ease-in-out infinite;
}
.squid-fin-right {
    animation: squid-fin-flap-r 1.15s ease-in-out infinite 0.3s;
}

/* Cloak: while approaching (hunting) or fleeing, Squirty fades to a refracting
   outline (a light-bending shimmer), then pops back out on the strike. The
   transition is re-enabled only for opacity/filter (transform stays instant). */
.squid-svg {
    transition:
        opacity 0.16s ease-out,
        filter 0.16s ease-out !important;
}
.squid-svg.squid-cloaked {
    opacity: 0.16;
    filter: drop-shadow(0 0 0.6px #00e5ff) drop-shadow(0 0 0.6px #00e5ff)
        drop-shadow(0 0 2px rgba(125, 249, 255, 0.8));
}
#squid-container.cloaking {
    backdrop-filter: blur(2px) saturate(1.4) hue-rotate(-8deg);
    -webkit-backdrop-filter: blur(2px) saturate(1.4) hue-rotate(-8deg);
    border-radius: 46% 46% 40% 40%;
}
@keyframes squid-pop {
    0% {
        transform: scale(0.7);
    }
    60% {
        transform: scale(1.18);
    }
    100% {
        transform: scale(1);
    }
}
.squid-svg.squid-pop-active {
    animation: squid-pop 0.32s cubic-bezier(0.2, 1.4, 0.4, 1);
}

/* Hunting: tentacles wiggle faster/agitated as Squirty stalks the cursor. */
.squid-svg.squid-hunting .pixel-tentacle-1,
.squid-svg.squid-hunting .pixel-tentacle-2,
.squid-svg.squid-hunting .pixel-tentacle-3,
.squid-svg.squid-hunting .pixel-tentacle-4 {
    animation-duration: 0.25s;
}

/* Attacking: tentacles shoot out to grab the cursor. */
@keyframes squid-tentacle-strike {
    0% {
        transform: scaleY(1);
    }
    100% {
        transform: scaleY(2.6);
    }
}
.squid-svg.squid-attacking .pixel-tentacle-1,
.squid-svg.squid-attacking .pixel-tentacle-2,
.squid-svg.squid-attacking .pixel-tentacle-3,
.squid-svg.squid-attacking .pixel-tentacle-4 {
    transform-origin: 8px 12px;
    animation: squid-tentacle-strike 0.18s ease-out forwards;
}

/* Chewing: tentacles stay extended and chomp rapidly on the cursor. */
@keyframes squid-tentacle-chew {
    0%,
    100% {
        transform: scaleY(2.3);
    }
    50% {
        transform: scaleY(1.7);
    }
}
.squid-svg.squid-chewing .pixel-tentacle-1,
.squid-svg.squid-chewing .pixel-tentacle-2,
.squid-svg.squid-chewing .pixel-tentacle-3,
.squid-svg.squid-chewing .pixel-tentacle-4 {
    transform-origin: 8px 12px;
    animation: squid-tentacle-chew 0.14s steps(2) infinite;
}

/* Pulse swim scale */
@keyframes squid-pulse {
    0%,
    100% {
        transform: scale(1);
    }
    30% {
        transform: scale(0.85, 1.15);
    }
    70% {
        transform: scale(1.1, 0.9);
    }
}
.squid-pulse-active {
    animation: squid-pulse 0.7s ease-out;
}

.squid-ink {
    position: fixed;
    width: 24px;
    height: 24px;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.9;
    filter: drop-shadow(0 0 3px rgba(0, 255, 0, 0.7));
    transform-origin: center center;
    transition:
        transform 0.9s cubic-bezier(0.1, 0.8, 0.3, 1),
        opacity 0.9s ease-out;
}

/* ---- Squirty: long hunting tentacles, chromatophores, house & timeout ---- */

/* Full-viewport overlay the strike tentacles are drawn into. Click-through,
   sits just under the squid (z 10000) and above page content. */
#squid-tentacles {
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9998;
    overflow: visible;
}
#squid-tentacles path {
    fill: none;
    stroke-linecap: round;
    filter: drop-shadow(0 0 4px rgba(0, 229, 255, 0.85));
}

/* Chromatophore color-pulsing while hunting/striking: quick "weird" steps
   through cyan -> magenta -> amber -> green, like a hunting squid flashing. */
@keyframes squid-chromatophore {
    0% {
        filter: drop-shadow(0 0 3px rgba(0, 229, 255, 0.7)) hue-rotate(0deg)
            saturate(1.2) brightness(1);
    }
    25% {
        filter: drop-shadow(0 0 6px rgba(255, 64, 129, 0.8)) hue-rotate(170deg)
            saturate(1.9) brightness(1.3);
    }
    50% {
        filter: drop-shadow(0 0 5px rgba(255, 160, 0, 0.8)) hue-rotate(300deg)
            saturate(1.6) brightness(1.1);
    }
    75% {
        filter: drop-shadow(0 0 6px rgba(64, 255, 64, 0.85)) hue-rotate(90deg)
            saturate(1.8) brightness(1.25);
    }
    100% {
        filter: drop-shadow(0 0 3px rgba(0, 229, 255, 0.7)) hue-rotate(0deg)
            saturate(1.2) brightness(1);
    }
}
.squid-svg.squid-chromatophore {
    animation: squid-chromatophore 0.6s steps(4, end) infinite;
}

/* Squirty's house, parked in the top-right banner area. */
#squirty-house {
    position: fixed;
    top: 46px;
    right: 10px;
    width: 60px;
    height: 60px;
    /* Above the CRT screen overlay (body::after, z 9998) so the house is not
       washed out / hidden by the scanlines + corner vignette; still below the
       squid (z 10000). */
    z-index: 9999;
    pointer-events: none;
    image-rendering: pixelated;
    opacity: 0.96;
    filter: drop-shadow(0 0 4px rgba(255, 126, 182, 0.35));
}

/* Chimney bubbles: idle (hidden) until Squirty is sent to his house, then they
   rise out of the sponge and fade in a staggered loop. */
#squirty-house .sq-bubble {
    opacity: 0;
    transform-box: fill-box;
    transform-origin: center;
}
#squirty-house.timeout .sq-bubble {
    animation: sq-bubble-rise 1.8s linear infinite;
}
#squirty-house.timeout .sq-bubble.sq-b2 {
    animation-delay: 0.6s;
}
#squirty-house.timeout .sq-bubble.sq-b3 {
    animation-delay: 1.1s;
}
@keyframes sq-bubble-rise {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0.6);
    }
    25% {
        opacity: 0.9;
    }
    100% {
        opacity: 0;
        transform: translateY(-7px) scale(1);
    }
}

/* "Squirty timeout" toggle in the navbar. */
.navbar-squirty-timeout {
    float: right !important;
    display: inline-block !important;
    margin: 4px 6px !important;
    padding: 6px 12px !important;
    line-height: 22px !important; /* shared row height so the navbar add-ons align */
    vertical-align: middle !important;
    font-weight: 700 !important;
    font-size: 0.85rem !important;
    color: #00e5ff !important;
    background: rgba(0, 30, 40, 0.5) !important;
    border: 1px solid #00838f !important;
    border-radius: 4px !important;
    cursor: pointer !important;
    pointer-events: auto !important;
    user-select: none !important;
    text-shadow: 0 0 5px rgba(0, 229, 255, 0.5) !important;
}
.navbar-squirty-timeout:hover {
    background: rgba(0, 60, 80, 0.7) !important;
}
.navbar-squirty-timeout.active {
    color: #ff4081 !important;
    border-color: #ff4081 !important;
    text-shadow: 0 0 6px rgba(255, 64, 129, 0.6) !important;
}

/* Tucked into the house during timeout: stop the idle fin/tentacle motion. */
#squid-container.squid-tucked {
    z-index: 9996;
}
#squid-container.squid-tucked .squid-svg * {
    animation: none !important;
}

/* Mascot Clicks Counter in Navbar Banner */
.navbar-squirty-counter {
    float: right !important;
    display: inline-block !important;
    padding: 6px 16px !important;
    line-height: 22px !important; /* shared row height so the navbar add-ons align */
    font-weight: 700 !important;
    color: #40ff40 !important;
    text-shadow: 0 0 5px rgba(64, 255, 64, 0.6) !important;
    font-size: 0.95rem !important;
    pointer-events: none !important;
    border-left: 2px solid #008000 !important; /* visual left divider */
    margin-left: 8px !important;
    vertical-align: middle !important;
}

.navbar-squirty-counter .navbar-squirty-label {
    color: #008000 !important;
    text-shadow: none !important;
    margin-right: 4px !important;
}


/* ---------------------------------------------------------------------- */
/* Navbar add-ons: one centre line                                          */
/* ---------------------------------------------------------------------- */
/* Doxygen floats these into the menu row, each with its own height and margins, so they
   landed on four different centres (46 / 43 / 38 / 32 against a row centre of 45.5). One
   box for all three, contents centred inside it. */
.navbar-squirty-timeout,
.navbar-squirty-counter,
#MSearchBox {
    box-sizing: border-box;
    height: 28px;
    margin-top: 10px !important;
    margin-bottom: 10px !important;
    display: inline-flex !important;
    align-items: center;
    float: right !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    line-height: normal !important;
    vertical-align: middle !important;
}
.navbar-squirty-timeout,
.navbar-squirty-counter {
    gap: 6px;
    padding-inline: 12px !important;
}
#MSearchBox {
    padding-inline: 8px !important;
}
/* Doxygen sizes the field from its own sheet; let it fill the box it now sits in. */
#MSearchField {
    height: 26px;
    line-height: 26px;
    margin: 0;
    padding: 0 4px;
}
#MSearchSelect,
#MSearchCloseImg {
    vertical-align: middle;
}