:root {
    --ink: #101322;
    --paper: #f4f4ec;
    --panel: #d9d9d9;
    --panel-light: #ffffff;
    --panel-dark: #777777;
    --navy: #061d4f;
    --teal: #009c9c;
    --magenta: #d10f82;
    --yellow: #ffdf35;
    --green: #25a25a;
    --shadow: rgba(0, 0, 0, 0.32);
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    color: var(--ink);
    font-family: Tahoma, Verdana, Arial, sans-serif;
    line-height: 1.55;
    background-color: #0c2b50;
    background-image: url("../img/tile-grid.svg");
    background-attachment: fixed;
}

body::before {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    content: "";
    background:
        linear-gradient(90deg, rgba(255, 223, 53, 0.08), transparent 28%),
        linear-gradient(180deg, rgba(0, 156, 156, 0.13), rgba(6, 29, 79, 0.45));
}

a {
    color: #002f9f;
    font-weight: 700;
}

a:hover {
    color: var(--magenta);
}

img {
    max-width: 100%;
    height: auto;
}

button,
input,
select {
    font: inherit;
}

:focus-visible {
    outline: 3px solid var(--yellow);
    outline-offset: 3px;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 20;
    padding: 0.55rem 0.75rem;
    color: #000;
    background: var(--yellow);
    border: 2px solid #000;
    transform: translateY(-160%);
}

.skip-link:focus {
    transform: translateY(0);
}

.page-shell {
    width: min(1180px, calc(100% - 28px));
    margin: 14px auto 28px;
}

.top-window,
.window-panel,
.guestbook {
    background: var(--panel);
    border-color: var(--panel-light) var(--panel-dark) var(--panel-dark) var(--panel-light);
    border-style: solid;
    border-width: 3px;
    box-shadow: 8px 8px 0 var(--shadow);
}

.titlebar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 34px;
    padding: 0.35rem 0.65rem;
    color: #fff;
    font-weight: 700;
    background: linear-gradient(90deg, var(--navy), var(--teal));
}

.titlebar-dot {
    width: 14px;
    height: 14px;
    background: var(--yellow);
    border: 2px solid #000;
    box-shadow: inset -2px -2px 0 rgba(0, 0, 0, 0.28);
}

.titlebar-controls {
    margin-left: auto;
    font-family: "Courier New", monospace;
    font-size: 0.82rem;
}

.masthead {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem;
    background:
        repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.45) 0 8px, transparent 8px 16px),
        var(--paper);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    color: var(--ink);
    text-decoration: none;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 64px;
    aspect-ratio: 1;
    color: #fff;
    font-size: 1.45rem;
    font-weight: 900;
    background: var(--magenta);
    border: 3px solid #000;
    box-shadow: inset -5px -5px 0 rgba(0, 0, 0, 0.25);
}

.brand strong {
    display: block;
    font-size: clamp(1.45rem, 5vw, 3.8rem);
    line-height: 0.95;
}

.brand small {
    display: block;
    max-width: 48ch;
    margin-top: 0.35rem;
    color: #344;
    font-size: clamp(0.82rem, 2vw, 1rem);
}

.counter {
    display: grid;
    min-width: 138px;
    align-content: center;
    justify-items: center;
    padding: 0.55rem 0.7rem;
    color: #2cff79;
    background: #050505;
    border: 3px inset #777;
    font-family: "Courier New", monospace;
}

.counter span {
    color: #f5f5f5;
    font-size: 0.72rem;
    text-transform: uppercase;
}

.counter strong {
    font-size: 1.5rem;
    letter-spacing: 0;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0.65rem 1rem;
    background: #bfc7d1;
    border-top: 2px solid #fff;
    border-bottom: 2px solid #777;
}

.main-nav a,
.retro-button,
.tab-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0.48rem 0.76rem;
    color: #000;
    text-decoration: none;
    background: #e9e9e9;
    border-color: #fff #555 #555 #fff;
    border-style: solid;
    border-width: 2px;
    box-shadow: inset -1px -1px 0 #aaa;
    cursor: pointer;
}

.main-nav a.is-active,
.main-nav a:hover,
.retro-button.primary,
.tab-button.is-active {
    color: #fff;
    background: var(--navy);
    border-color: #6aa8ff #020617 #020617 #6aa8ff;
}

.language-link {
    margin-left: auto;
}

.ticker {
    overflow: hidden;
    white-space: nowrap;
    color: #000;
    background: var(--yellow);
    border-top: 2px solid #222;
}

.ticker span {
    display: inline-block;
    min-width: 100%;
    padding: 0.35rem 0;
    animation: ticker 18s linear infinite;
}

main {
    display: grid;
    gap: 1.5rem;
    margin-top: 1.3rem;
}

.hero,
.subpage-hero {
    display: grid;
    min-height: min(720px, calc(100svh - 210px));
    align-items: center;
    gap: clamp(1.2rem, 4vw, 3rem);
    margin-inline: calc(50% - 50vw);
    padding: clamp(2.2rem, 5vw, 5.2rem) max(1rem, calc((100vw - 1180px) / 2));
    color: #fff;
    background:
        linear-gradient(90deg, rgba(6, 29, 79, 0.94), rgba(0, 98, 112, 0.82)),
        url("../img/banner-stats.svg") center right / auto 85% no-repeat,
        #061d4f;
    border-block: 4px solid #000;
}

.hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(270px, 0.8fr);
}

.subpage-hero {
    min-height: 340px;
    align-content: center;
}

.hero-copy,
.subpage-hero > * {
    max-width: 760px;
}

.kicker,
.section-label,
.status {
    margin: 0 0 0.45rem;
    color: var(--yellow);
    font-family: "Courier New", monospace;
    font-size: 0.84rem;
    font-weight: 700;
    text-transform: uppercase;
}

.section-label {
    color: var(--magenta);
}

h1,
h2,
h3,
p {
    overflow-wrap: anywhere;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.05;
}

h1 {
    max-width: 11ch;
    font-size: clamp(3rem, 9vw, 7.5rem);
    text-shadow: 5px 5px 0 #000;
}

.subpage-hero h1 {
    max-width: 13ch;
}

h2 {
    font-size: clamp(1.6rem, 4vw, 3rem);
}

h3 {
    font-size: 1.25rem;
}

.headline {
    max-width: 52ch;
    font-size: clamp(1.15rem, 2.8vw, 1.75rem);
    font-weight: 700;
}

.hero-copy p:not(.kicker),
.subpage-hero p:not(.kicker) {
    max-width: 64ch;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    margin-top: 1.1rem;
}

.hero-visual {
    display: grid;
    gap: 1rem;
    justify-items: center;
}

.pixel-avatar {
    width: min(270px, 75vw);
    image-rendering: pixelated;
    filter: drop-shadow(10px 10px 0 rgba(0, 0, 0, 0.45));
}

.console-window {
    width: min(100%, 420px);
    padding: 0.75rem;
    color: #52ff80;
    background: #050505;
    border: 3px inset #888;
    font-family: "Courier New", monospace;
}

.console-title {
    margin: -0.75rem -0.75rem 0.65rem;
    padding: 0.35rem 0.5rem;
    color: #fff;
    background: #001f70;
}

.console-window code {
    display: block;
    margin-top: 0.25rem;
    white-space: normal;
}

.cursor {
    animation: blink 0.9s steps(2, start) infinite;
}

.window-panel,
.guestbook {
    padding: clamp(1rem, 3vw, 2rem);
}

.bio-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
    gap: 2rem;
}

.timeline {
    display: grid;
    gap: 0.8rem;
    padding: 0;
    margin: 1.3rem 0 0;
    list-style: none;
}

.timeline li {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 0.8rem;
    align-items: start;
}

.timeline span {
    padding: 0.3rem 0.45rem;
    color: #fff;
    background: var(--navy);
    border: 2px solid #000;
    font-family: "Courier New", monospace;
    text-align: center;
}

.timeline p {
    margin: 0;
}

.dossier {
    padding: 1rem;
    background: var(--paper);
    border: 2px dashed var(--panel-dark);
}

.dossier dl,
.model-meta {
    display: grid;
    gap: 0.55rem;
    margin: 1rem 0 0;
}

.dossier dl div,
.model-meta div {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 0.7rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px dotted #777;
}

dt {
    font-weight: 700;
}

dd {
    margin: 0;
}

.interests ul,
.metric-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    padding: 0;
    margin: 1rem 0 0;
    list-style: none;
}

.interests li,
.metric-strip span,
.status {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0.25rem 0.55rem;
    color: #000;
    background: var(--yellow);
    border: 2px solid #000;
    box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.25);
}

.projects {
    display: grid;
    gap: 1.1rem;
}

.section-heading {
    max-width: 760px;
}

.project-list {
    display: grid;
    gap: 0.9rem;
}

.project-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: center;
    padding: 1rem;
    background: var(--paper);
    border: 2px solid #888;
}

.project-item p {
    margin-bottom: 0;
}

.guestbook {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 1rem;
    align-items: center;
    background: #fff8c9;
}

.lab-layout,
.ml-layout {
    display: grid;
    grid-template-columns: minmax(260px, 0.38fr) minmax(0, 1fr);
    gap: 1.2rem;
    align-items: start;
}

.control-panel {
    display: grid;
    gap: 0.8rem;
}

.control-panel label {
    font-weight: 700;
}

.control-panel select,
.control-panel input[type="range"] {
    width: 100%;
}

.control-panel select {
    min-height: 40px;
    padding: 0.35rem;
    background: #fff;
    border: 2px inset #888;
}

.control-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
}

.control-actions .retro-button {
    width: 100%;
}

.retro-button:disabled {
    cursor: wait;
    opacity: 0.68;
}

.simulation-status {
    height: 58px;
    margin: 0;
    padding: 0.7rem;
    overflow: auto;
    color: #52ff80;
    background: #050505;
    border: 2px inset #777;
    font-family: "Courier New", monospace;
}

.clt-workspace {
    display: grid;
    gap: 1.2rem;
}

.chart-panel {
    min-height: 360px;
}

.window-title {
    margin: calc(clamp(1rem, 3vw, 2rem) * -1) calc(clamp(1rem, 3vw, 2rem) * -1) 1rem;
    padding: 0.45rem 0.7rem;
    color: #fff;
    font-weight: 700;
    background: var(--navy);
}

.histogram {
    display: flex;
    align-items: end;
    gap: clamp(0.4rem, 2vw, 1rem);
    height: 260px;
    padding: 1rem;
    overflow: hidden;
    background:
        linear-gradient(#d8eff5 1px, transparent 1px),
        linear-gradient(90deg, #d8eff5 1px, transparent 1px),
        #ffffff;
    background-size: 24px 24px;
    border: 2px inset #777;
    contain: layout paint;
}

.histogram > span:not(.histogram-bin) {
    flex: 1;
    min-width: 18px;
    background: var(--teal);
    border: 2px solid #00434a;
    box-shadow: inset -4px -4px 0 rgba(0, 0, 0, 0.22);
    transition: height 180ms ease;
}

.clt-histogram {
    display: grid;
    grid-template-columns: repeat(var(--bin-count, 24), minmax(7px, 1fr));
    align-items: end;
    gap: clamp(0.14rem, 0.9vw, 0.42rem);
}

.histogram .histogram-bin {
    position: relative;
    display: flex;
    align-items: end;
    min-width: 0;
    height: 100%;
    background: transparent;
    border: 0;
    box-shadow: none;
}

.bar-fill {
    width: 100%;
    min-height: 2px;
    height: var(--bar-height);
    background: var(--teal);
    border: 2px solid #00434a;
    box-shadow: inset -4px -4px 0 rgba(0, 0, 0, 0.22);
    transition: height 110ms ease;
}

.histogram-bin.has-normal::after {
    position: absolute;
    right: -1px;
    bottom: var(--normal-height);
    left: -1px;
    height: 0;
    border-top: 3px solid var(--magenta);
    content: "";
    filter: drop-shadow(0 1px 0 #fff);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.55rem;
    margin: 1rem 0 0;
}

.metrics-grid div {
    min-width: 0;
    padding: 0.6rem;
    color: #52ff80;
    background: #050505;
    border: 2px inset #777;
    font-family: "Courier New", monospace;
}

.metrics-grid dt {
    color: #fff;
    font-size: 0.72rem;
    text-transform: uppercase;
}

.metrics-grid dd {
    margin: 0.2rem 0 0;
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 700;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    white-space: nowrap;
    border: 0;
    clip: rect(0, 0, 0, 0);
}

.formula {
    display: block;
    margin-top: 1rem;
    padding: 0.8rem;
    color: #52ff80;
    background: #050505;
    border: 2px inset #777;
    white-space: normal;
}

.step-list {
    margin-bottom: 0;
}

.dataset-panel a {
    display: block;
    overflow-wrap: anywhere;
}

.dataset-badge {
    display: inline-flex;
    margin: 0.65rem 0 0;
    padding: 0.28rem 0.5rem;
    color: #000;
    background: var(--yellow);
    border: 2px solid #000;
    font-family: "Courier New", monospace;
    font-weight: 700;
}

.dataset-facts,
.prediction-card,
.confusion-grid {
    display: grid;
    gap: 0.45rem;
    margin: 1rem 0;
}

.dataset-facts div,
.prediction-card div,
.confusion-grid div {
    display: grid;
    grid-template-columns: minmax(110px, 0.45fr) minmax(0, 1fr);
    gap: 0.6rem;
    padding: 0.45rem 0;
    border-bottom: 1px dotted #777;
}

.sample-picker {
    display: grid;
    gap: 0.35rem;
    margin-top: 1rem;
    font-weight: 700;
}

.sample-picker select {
    width: 100%;
    min-height: 40px;
    padding: 0.35rem;
    background: #fff;
    border: 2px inset #888;
}

.prediction-card {
    padding: 0.65rem;
    color: #52ff80;
    background: #050505;
    border: 2px inset #777;
    font-family: "Courier New", monospace;
}

.prediction-card dt {
    color: #fff;
}

.compact-heading {
    margin-top: 1.2rem;
    font-size: 1rem;
}

.feature-list,
.weight-list,
.tree-rule-list,
.tree-path {
    display: grid;
    gap: 0.48rem;
    padding: 0;
    margin: 0.7rem 0 0;
    list-style: none;
}

.feature-list li,
.weight-list li {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.35rem 0.65rem;
    align-items: center;
    min-width: 0;
}

.feature-list span,
.weight-list span {
    overflow-wrap: anywhere;
}

.feature-list i,
.weight-list i {
    grid-column: 1 / -1;
    height: 10px;
    overflow: hidden;
    background: #fff;
    border: 2px inset #888;
}

.feature-list b,
.weight-list b {
    display: block;
    height: 100%;
    min-width: 2px;
    background: var(--teal);
    transition: width 160ms ease;
}

.weight-list b {
    background: var(--magenta);
}

.tree-rule-list li,
.tree-path li {
    padding: 0.45rem 0.55rem;
    background: #fff;
    border: 2px solid #aaa;
    font-family: "Courier New", monospace;
    overflow-wrap: anywhere;
}

.tree-path {
    list-style: decimal;
    padding-left: 1.4rem;
}

.source-note {
    margin-top: 1.2rem;
    padding-top: 1rem;
    border-top: 2px dashed #777;
}

.source-note h3 {
    font-size: 1rem;
}

.source-note p {
    margin-bottom: 0.35rem;
}

.model-workbench {
    padding-top: 1rem;
}

.tab-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 1rem;
}

.model-panel {
    display: none;
    padding: 1rem;
    background: var(--paper);
    border: 2px inset #888;
}

.model-panel.is-active {
    display: block;
}

.prediction-result {
    display: grid;
    gap: 0.2rem;
    margin: 1rem 0;
    padding: 0.75rem;
    color: #52ff80;
    background: #050505;
    border: 2px inset #777;
    font-family: "Courier New", monospace;
}

.prediction-result p {
    margin: 0;
    color: #fff;
    font-weight: 700;
    text-transform: uppercase;
}

.prediction-result strong {
    font-size: clamp(1.45rem, 3vw, 2.2rem);
    line-height: 1.1;
}

.prediction-result span {
    color: #d7ffd9;
}

.training-console {
    display: grid;
    gap: 0.8rem;
    margin: 1rem 0;
    padding: 0.8rem;
    color: #52ff80;
    background: #050505;
    border: 2px inset #777;
    font-family: "Courier New", monospace;
}

.training-header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem 0.8rem;
    align-items: baseline;
    justify-content: space-between;
}

.training-header h3 {
    color: #fff;
    font-size: 1rem;
    text-transform: uppercase;
}

.training-header span,
.training-meta {
    color: #d7ffd9;
}

.training-progress {
    height: 16px;
    overflow: hidden;
    background: #111;
    border: 2px inset #777;
}

.training-progress span {
    display: block;
    width: 0;
    height: 100%;
    background: var(--yellow);
    box-shadow: inset -4px -4px 0 rgba(0, 0, 0, 0.28);
    transition: width 220ms ease;
}

.training-readout {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.45rem;
    margin: 0;
}

.training-readout div {
    min-width: 0;
    padding: 0.5rem;
    background: #101322;
    border: 1px solid #4b5563;
}

.training-readout dt {
    color: #fff;
    font-size: 0.72rem;
    text-transform: uppercase;
}

.training-readout dd {
    margin-top: 0.15rem;
    font-size: 1.15rem;
    font-weight: 700;
}

.training-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin: 0;
}

.training-meta span {
    padding: 0.15rem 0.35rem;
    border: 1px solid #334155;
}

.training-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.training-weight-list,
.training-tree-path {
    display: grid;
    gap: 0.45rem;
    padding: 0;
    margin: 0;
    list-style: none;
}

.training-weight-list li {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.25rem 0.65rem;
    align-items: center;
}

.training-weight-list span {
    color: #fff;
    overflow-wrap: anywhere;
}

.training-weight-list i {
    grid-column: 1 / -1;
    height: 9px;
    overflow: hidden;
    background: #111;
    border: 1px solid #4b5563;
}

.training-weight-list b {
    display: block;
    height: 100%;
    min-width: 2px;
    background: var(--teal);
    transition: width 260ms ease;
}

.training-tree-path {
    list-style: decimal;
    padding-left: 1.35rem;
}

.training-tree-path li {
    padding: 0.4rem 0.5rem;
    color: #000;
    background: var(--yellow);
    border: 2px solid #000;
    overflow-wrap: anywhere;
}

.training-confusion {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.35rem;
    margin: 0;
}

.training-confusion div {
    display: grid;
    justify-items: center;
    padding: 0.45rem;
    background: #101322;
    border: 1px solid #4b5563;
}

.training-confusion dt {
    color: #fff;
}

.training-confusion dd {
    font-size: 1.15rem;
    font-weight: 700;
}

.metric-strip-compact span {
    gap: 0.35rem;
}

.confusion-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.confusion-grid div {
    display: grid;
    grid-template-columns: 1fr;
    justify-items: center;
    padding: 0.65rem;
    color: #52ff80;
    background: #050505;
    border: 2px inset #777;
    font-family: "Courier New", monospace;
}

.confusion-grid dt {
    color: #fff;
}

.confusion-grid dd {
    font-size: 1.35rem;
    font-weight: 700;
}

.site-footer {
    margin-top: 1.5rem;
    padding: 1rem;
    color: #fff;
    text-align: center;
    background: rgba(0, 0, 0, 0.72);
    border: 2px solid rgba(255, 255, 255, 0.35);
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.45rem;
    margin-bottom: 0.8rem;
}

.legal-nav {
    margin-top: 0.6rem;
    font-size: 0.8rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.legal-nav a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: underline;
}

.legal-nav a:hover {
    color: #fff;
}

.legal-block {
    max-width: 700px;
}

.legal-block h2 {
    margin-top: 1.5rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid var(--panel-dark);
    padding-bottom: 0.2rem;
}

.legal-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.legal-table th,
.legal-table td {
    text-align: left;
    padding: 0.35rem 0.6rem;
    border: 1px solid var(--panel-dark);
}

.legal-table thead {
    background: var(--panel);
}

.badge-row img {
    width: 88px;
    height: 31px;
    image-rendering: pixelated;
}

@keyframes ticker {
    from {
        transform: translateX(100%);
    }
    to {
        transform: translateX(-100%);
    }
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

/* ─── Visitor Wall ─────────────────────────────────────────────────────── */

.visitor-wall {
    background: var(--panel);
    border-color: var(--panel-light) var(--panel-dark) var(--panel-dark) var(--panel-light);
    border-style: solid;
    border-width: 3px;
    box-shadow: 8px 8px 0 var(--shadow);
}

.visitor-wall-inner {
    display: grid;
    gap: 1.2rem;
    padding: clamp(1rem, 3vw, 2rem);
}

.visitor-wall-form {
    display: grid;
    gap: 0.5rem;
}

.visitor-wall-input-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.visitor-wall-form input[name="name"] {
    flex: 1 1 180px;
    min-height: 40px;
    padding: 0.35rem 0.55rem;
    background: #fff;
    border: 2px inset #888;
    font: inherit;
}

.visitor-wall-hint,
.visitor-wall-privacy {
    margin: 0;
    color: var(--panel-dark);
    font-size: 0.78rem;
}

.visitor-wall-status {
    margin: 0;
    min-height: 1.4em;
    color: var(--teal);
    font-family: "Courier New", monospace;
    font-size: 0.85rem;
}

.visitor-wall-canvas {
    position: relative;
    min-height: 220px;
    overflow: hidden;
    background:
        repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.35) 0 6px, transparent 6px 12px),
        #e8e8e0;
    border: 2px inset #777;
}

.visitor-card {
    position: absolute;
    display: inline-block;
    padding: 0.28rem 0.65rem;
    color: var(--ink);
    font-family: "Courier New", monospace;
    font-size: 0.78rem;
    white-space: nowrap;
    cursor: default;
    user-select: none;
    background: var(--yellow);
    border: 2px solid #333;
    box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.28);
}

@media (max-width: 840px) {
    .page-shell {
        width: min(100% - 18px, 720px);
        margin-top: 9px;
    }

    .masthead,
    .hero,
    .bio-grid,
    .visitor-wall,
    .lab-layout,
    .ml-layout {
        grid-template-columns: 1fr;
    }

    .masthead {
        display: grid;
    }

    .brand {
        align-items: flex-start;
    }

    .counter {
        justify-self: start;
    }

    .language-link {
        margin-left: 0;
    }

    .hero,
    .subpage-hero {
        min-height: auto;
        padding-block: 2.4rem;
        background:
            linear-gradient(180deg, rgba(6, 29, 79, 0.96), rgba(0, 98, 112, 0.9)),
            #061d4f;
    }

    h1 {
        max-width: 9ch;
    }

    .project-item,
    .timeline li,
    .dossier dl div,
    .model-meta div,
    .dataset-facts div,
    .prediction-card div,
    .confusion-grid,
    .training-readout,
    .training-confusion,
    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .visitor-wall-canvas {
        min-height: 160px;
    }
}

@media (max-width: 520px) {
    .titlebar {
        font-size: 0.82rem;
    }

    .titlebar-controls {
        display: none;
    }

    .main-nav a,
    .retro-button,
    .tab-button {
        width: 100%;
    }

    .brand-mark {
        width: 52px;
        font-size: 1.1rem;
    }

    .histogram {
        height: 190px;
        gap: 0.28rem;
    }

    .histogram > span:not(.histogram-bin) {
        min-width: 10px;
    }

    .control-actions {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}