/*
    Public nav. The look comes from Admin → Settings → Site → Navbar and lands on <html>:
      data-nav-variant     webring | bios | classic
      data-nav-head        ascii | off                    (webring title art)
      data-nav-title-anim  none | rainbow | wave | glitch | flicker | typewriter
      data-nav-foot        off | mountains | <plot id>    (webring ticker; drawn by site_nav.js)
      data-nav-ticker-look trace | bars | sparks          (live ticker look)
      data-nav-ticker-anim none | rainbow | wave | glitch | flicker
    Option lists live in helpers/nav_settings.go.
*/

/* ---------- Shared base ---------- */

.site-nav {
    padding: 10px 0;
    box-sizing: border-box;
}

.site-nav-bar {
    position: relative;
    box-sizing: border-box;
}

.site-nav-items {
    display: flex;
    min-width: 0;
}

.site-nav-item {
    display: flex;
    align-items: center;
    min-width: 0;
    color: inherit;
    text-decoration: none;
    box-sizing: border-box;
}

.site-nav-item:hover {
    text-decoration: none;
}

.site-nav-item:focus-visible {
    outline: 2px dotted #fff;
    outline-offset: 2px;
}

.site-nav-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.site-nav-icon img {
    display: block;
    height: 24px;
    image-rendering: pixelated;
}

.site-nav-head,
.site-nav-foot,
.site-nav-meta,
.site-nav-art,
.site-nav-ticker {
    display: none;
}

@media (max-width: 600px) {
    .site-nav {
        padding: 10px;
    }
}

/* ---------- classic: the original coloured outset buttons ---------- */

[data-nav-variant="classic"] .site-nav-items {
    justify-content: space-around;
    color: #fff;
}

[data-nav-variant="classic"] .site-nav-item {
    flex: 1;
    gap: 8px;
    padding: 5px;
    margin: 0 2px;
    border: 4px outset var(--nav-color);
    background: var(--nav-color);
    text-shadow: 1px 1px 5px #000;
}

[data-nav-variant="classic"] .site-nav-item.is-current,
[data-nav-variant="classic"] .site-nav-item:active {
    border-style: inset;
}

@media (max-width: 600px) {
    [data-nav-variant="classic"] .site-nav-items {
        flex-direction: column;
    }

    [data-nav-variant="classic"] .site-nav-item {
        margin: 5px 0;
    }
}

/* ---------- bios: blue Setup Utility ---------- */

[data-nav-variant="bios"] .site-nav-bar {
    --bios-blue: #0000a8;
    --bios-gray: #c0c0c0;
    --bios-yellow: #ffff55;

    padding: 0 0 4px;
    background: var(--bios-blue);
    border: 4px double var(--bios-gray);
    box-shadow: 0 0 0 2px var(--bios-blue), 4px 4px 0 2px rgba(0, 0, 0, 0.6);
    color: var(--bios-gray);
    font-family: 'PixelOperatorMono', 'PixelOperator', monospace;
    font-size: 15px;
}

[data-nav-variant="bios"] .site-nav-head {
    display: flex;
    justify-content: center;
    padding: 1px 8px;
    background: var(--bios-gray);
    color: var(--bios-blue);
    font-weight: bold;
    letter-spacing: 1px;
    text-transform: uppercase;
    white-space: nowrap;
    overflow: hidden;
}

[data-nav-variant="bios"] .site-nav-head-text {
    overflow: hidden;
    text-overflow: ellipsis;
}

[data-nav-variant="bios"] .site-nav-head-text::before {
    content: "danlegt setup utility - copyright (c) 1998-2026 legt software, inc.";
}

[data-nav-variant="bios"] .site-nav-items {
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 7px 10px 5px;
    gap: 2px 4px;
}

[data-nav-variant="bios"] .site-nav-item {
    position: relative;
    padding: 1px 10px 1px 8px;
    gap: 8px;
    color: var(--bios-yellow);
    text-transform: uppercase;
}

[data-nav-variant="bios"] .site-nav-icon {
    display: none;
}

[data-nav-variant="bios"] .site-nav-meta {
    display: inline;
    color: var(--bios-gray);
}

[data-nav-variant="bios"] .site-nav-meta::before {
    content: "[";
}

[data-nav-variant="bios"] .site-nav-meta::after {
    content: "]";
}

[data-nav-variant="bios"] .site-nav-item:hover {
    background: #0000d8;
    color: #fff;
}

[data-nav-variant="bios"] .site-nav-item.is-current {
    background: #a80000;
    color: #fff;
}

[data-nav-variant="bios"] .site-nav-item.is-current .site-nav-meta {
    color: #fff;
}

[data-nav-variant="bios"] .site-nav-item.is-current::before {
    content: "\25BA";
    position: absolute;
    left: -6px;
    color: #fff;
}

[data-nav-variant="bios"] .site-nav-item.is-current::after {
    content: "\258C";
    margin-left: -4px;
    animation: site-nav-blink 1s steps(1) infinite;
}

[data-nav-variant="bios"] .site-nav-foot {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin: 0 8px;
    padding-top: 3px;
    border-top: 1px solid var(--bios-gray);
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
}

[data-nav-variant="bios"] .site-nav-foot-text {
    display: flex;
    justify-content: space-between;
    flex: 1;
    gap: 12px;
}

[data-nav-variant="bios"] .site-nav-foot-text::before {
    content: "\2191\2193\2192\2190 : select item\00a0\00a0\00a0\00a0 enter : select";
}

[data-nav-variant="bios"] .site-nav-foot-text::after {
    content: "esc : exit\00a0\00a0\00a0\00a0 f10 : save & exit setup";
}

@media (max-width: 600px) {
    [data-nav-variant="bios"] .site-nav-items {
        justify-content: flex-start;
        padding-left: 16px;
    }

    [data-nav-variant="bios"] .site-nav-item {
        flex: 1 1 45%;
    }

    [data-nav-variant="bios"] .site-nav-foot-text::after {
        display: none;
    }
}

/* ---------- webring: 90s text-link bar ---------- */

[data-nav-variant="webring"] .site-nav-bar {
    padding: 6px 10px 5px;
    border: 6px ridge #fff;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.93);
    text-align: center;
}

/* Title: figlet-style "danlegt", tinted left to right with the six page colours. */
[data-nav-variant="webring"] .site-nav-head {
    display: flex;
    justify-content: center;
    margin-bottom: 4px;
}

[data-nav-variant="webring"] .site-nav-art {
    display: block;
    margin: 0;
    font-family: 'PixelOperatorMono', monospace;
    font-size: 16px;
    font-weight: bold;
    line-height: 0.875;
    text-align: left;
    white-space: pre;
    color: #fff;
    background: linear-gradient(90deg, #ff9a3c, #3cb8ff, #4fe03a, #b86bff, #ff4d4d, #ffd23c);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-nav-variant="webring"][data-nav-head="off"] .site-nav-head {
    display: none;
}

[data-nav-variant="webring"] .site-nav-items {
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 2px 0;
}

[data-nav-variant="webring"] .site-nav-item {
    gap: 6px;
    padding: 2px 8px;
    font-size: 15px;
    color: color-mix(in srgb, var(--nav-color) 55%, #fff);
}

[data-nav-variant="webring"] .site-nav-item::before,
[data-nav-variant="webring"] .site-nav-item::after {
    color: #777;
}

[data-nav-variant="webring"] .site-nav-item::before {
    content: "[";
}

[data-nav-variant="webring"] .site-nav-item::after {
    content: "]";
}

[data-nav-variant="webring"] .site-nav-icon img {
    height: 16px;
}

[data-nav-variant="webring"] .site-nav-label {
    text-decoration: underline;
}

[data-nav-variant="webring"] .site-nav-item:hover .site-nav-label {
    color: #ff0;
}

[data-nav-variant="webring"] .site-nav-item:hover .site-nav-icon img {
    animation: site-nav-bob 0.6s steps(1) infinite;
}

[data-nav-variant="webring"] .site-nav-item.is-current {
    color: #fff;
}

[data-nav-variant="webring"] .site-nav-item.is-current .site-nav-label {
    text-decoration: none;
}

[data-nav-variant="webring"] .site-nav-item.is-current::before,
[data-nav-variant="webring"] .site-nav-item.is-current::after {
    color: #ff0;
    animation: site-nav-blink 1s steps(1) infinite;
}

[data-nav-variant="webring"] .site-nav-item.is-current::before {
    content: ">>";
}

[data-nav-variant="webring"] .site-nav-item.is-current::after {
    content: "<<";
}

/* Ticker: site_nav.js fills the track with two identical halves, so -50% loops seamlessly. */
[data-nav-variant="webring"] .site-nav-foot {
    display: block;
    overflow: hidden;
    margin-top: 4px;
    padding-top: 4px;
    border-top: 1px dashed #555;
}

[data-nav-variant="webring"][data-nav-foot="off"] .site-nav-foot {
    display: none;
}

[data-nav-variant="webring"] .site-nav-ticker {
    display: block;
    margin: 0;
    font-family: 'PixelOperatorMono', monospace;
    font-size: 16px;
    font-weight: bold;
    line-height: 0.875;
    text-align: left;
    white-space: pre;
    color: #8f8fc0;
}

.site-nav-ticker-track {
    display: inline-block;
    animation: site-nav-ticker var(--ticker-duration, 30s) linear infinite;
    animation-delay: var(--ticker-scroll-delay, 0s);
}

/* Effects wrap, rather than replace, the static track's scrolling transform. */
.site-nav-ticker-effect,
.site-nav-ticker-signal {
    display: inline-block;
    vertical-align: top;
}

.site-nav-ticker {
    overflow: hidden;
    min-height: 1.75em;
    padding-block: 3px;
}

.site-nav-ticker-column {
    display: inline-block;
    vertical-align: top;
    white-space: pre;
    animation: site-nav-ticker-wave 1.6s ease-in-out infinite;
    animation-delay: calc(var(--x) * -0.06s + var(--ticker-effect-delay, 0s));
}

@keyframes site-nav-ticker-wave {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

[data-nav-foot="network"] .site-nav-ticker { color: #75bce3; }
[data-nav-foot="input"] .site-nav-ticker { color: #e5af7f; }
[data-nav-foot="frames"] .site-nav-ticker { color: #b8a0e9; }
[data-nav-foot="combined"] .site-nav-ticker { color: #8ed4b0; }

[data-nav-ticker-anim="rainbow"] .site-nav-ticker-track,
[data-nav-ticker-anim="rainbow"] .site-nav-ticker-signal {
    background-image: linear-gradient(90deg, #ff9a3c, #3cb8ff, #4fe03a, #b86bff, #ff4d4d, #ffd23c, #ff9a3c);
    background-size: 200% 100%;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: site-nav-title-rainbow 4s linear infinite;
    animation-delay: var(--ticker-effect-delay, 0s);
}

[data-nav-ticker-anim="rainbow"] .site-nav-ticker-track {
    animation: site-nav-ticker var(--ticker-duration, 30s) linear infinite, site-nav-title-rainbow 4s linear infinite;
    animation-delay: var(--ticker-scroll-delay, 0s), var(--ticker-effect-delay, 0s);
}

[data-nav-ticker-anim="glitch"] .site-nav-ticker-effect {
    animation: site-nav-ticker-glitch 4s steps(1) infinite;
    animation-delay: var(--ticker-effect-delay, 0s);
}

@keyframes site-nav-ticker-glitch {
    0%, 89%, 100% { transform: none; filter: none; }
    90% { transform: translateX(-1px) skewX(-3deg); filter: drop-shadow(1px 0 #ff00d4); }
    92% { transform: translateX(1px); filter: drop-shadow(-1px 0 #00f0ff); }
    94% { transform: none; filter: none; }
}

[data-nav-ticker-anim="flicker"] .site-nav-ticker-effect {
    animation: site-nav-ticker-flicker 3.4s steps(1) infinite;
    animation-delay: var(--ticker-effect-delay, 0s);
}

@keyframes site-nav-ticker-flicker {
    0%, 100% { opacity: 1; filter: brightness(1.08); }
    42% { opacity: 0.75; }
    44% { opacity: 1; }
    71% { opacity: 0.85; }
    72% { opacity: 1; }
}

[data-nav-paused="true"] .site-nav-bar *,
[data-nav-paused="true"] .site-nav-bar *::before,
[data-nav-paused="true"] .site-nav-bar *::after {
    animation-play-state: paused !important;
}

@keyframes site-nav-ticker {
    to { transform: translateX(-50%); }
}

@keyframes site-nav-bob {
    0%, 100% { transform: translateY(0); }
    33%      { transform: translateY(-2px); }
    66%      { transform: translateY(-1px); }
}

@media (max-width: 600px) {
    [data-nav-variant="webring"] .site-nav-art {
        font-size: 11px;
    }
}

/* ---------- webring title animations ---------- */

[data-nav-title-anim="rainbow"] .site-nav-art {
    background-size: 200% 100%;
    background-image: linear-gradient(90deg, #ff9a3c, #3cb8ff, #4fe03a, #b86bff, #ff4d4d, #ffd23c, #ff9a3c);
    animation: site-nav-title-rainbow 4s linear infinite;
}

@keyframes site-nav-title-rainbow {
    to { background-position: -200% 0; }
}

/* Wave: site_nav.js splits the art into one span per character; each keeps its slice of the gradient. */
[data-nav-title-anim="wave"] .site-nav-art {
    background: none;
    -webkit-text-fill-color: currentColor;
}

.site-nav-art-char {
    display: inline-block;
    background: linear-gradient(90deg, #ff9a3c, #3cb8ff, #4fe03a, #b86bff, #ff4d4d, #ffd23c);
    background-size: calc(var(--title-cols, 37) * 1ch) 100%;
    background-position: calc(var(--x) * -1ch) 0;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: site-nav-title-wave 1.6s ease-in-out infinite;
    animation-delay: calc(var(--x) * -0.06s);
}

@keyframes site-nav-title-wave {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-4px); }
}

[data-nav-title-anim="glitch"] .site-nav-art {
    animation: site-nav-title-glitch 3s steps(1) infinite;
}

@keyframes site-nav-title-glitch {
    0%, 86%, 100% { transform: none; filter: none; }
    88% { transform: translateX(-3px) skewX(-8deg); filter: drop-shadow(3px 0 #ff00d4) drop-shadow(-3px 0 #00f0ff); }
    90% { transform: translateX(2px); filter: drop-shadow(-2px 0 #ff00d4) drop-shadow(2px 0 #00f0ff); clip-path: inset(30% 0 35% 0); }
    92% { transform: translateX(-1px) skewX(6deg); filter: drop-shadow(2px 0 #ff00d4); clip-path: none; }
    94% { transform: none; filter: drop-shadow(-1px 0 #00f0ff); }
}

[data-nav-title-anim="flicker"] .site-nav-art {
    animation: site-nav-title-flicker 2.4s steps(1) infinite;
}

@keyframes site-nav-title-flicker {
    0%, 100% { opacity: 1; filter: brightness(1.15) drop-shadow(0 0 3px rgba(255, 255, 255, 0.35)); }
    8%  { opacity: 0.55; }
    9%  { opacity: 1; }
    42% { opacity: 0.8; filter: brightness(0.9); }
    44% { opacity: 1; }
    71% { opacity: 0.4; }
    72% { opacity: 1; }
}

/* Typewriter: reveal one column per step, hold, then repeat. */
[data-nav-title-anim="typewriter"] .site-nav-art {
    animation: site-nav-title-type 6s steps(37) infinite;
}

@keyframes site-nav-title-type {
    0%        { clip-path: inset(0 100% 0 0); }
    45%, 100% { clip-path: inset(0 0 0 0); }
}

/* ---------- shared keyframes ---------- */

@keyframes site-nav-blink {
    50% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
    [data-nav-variant] .site-nav-bar *,
    [data-nav-variant] .site-nav-bar *::before,
    [data-nav-variant] .site-nav-bar *::after {
        animation: none !important;
    }
}