:root {
    --desktop: #008080;
    --window: #c0c0c0;
    --light: #ffffff;
    --mid: #dfdfdf;
    --shadow: #808080;
    --black: #000000;
    --navy: #000080;
    --screen: #080908;
    --phosphor: #d8ff44;
    --ui: "MS Sans Serif", Tahoma, Geneva, sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--desktop); }

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background:
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        var(--desktop);
    background-size: 4px 4px;
    color: #000;
    font: 13px/1.35 var(--ui);
}

button, a { font: inherit; }
button { border-radius: 0; cursor: pointer; }
a { color: inherit; }

button:focus-visible,
a:focus-visible,
canvas:focus-visible {
    outline: 2px dotted #fff;
    outline-offset: 3px;
}

.home-shell {
    display: grid;
    grid-template-columns: minmax(280px, .72fr) minmax(480px, 1.28fr);
    grid-template-rows: minmax(0, 1fr) auto auto;
    gap: clamp(18px, 3vw, 44px);
    width: min(1480px, 100%);
    min-height: 100vh;
    margin: 0 auto;
    padding: clamp(18px, 3vw, 50px);
}

.brand-panel {
    display: flex;
    min-width: 0;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.brand-index {
    margin-bottom: clamp(18px, 4vh, 42px);
    padding: 4px 7px;
    background: #000;
    color: #fff;
    font: 10px "Courier New", monospace;
    letter-spacing: .15em;
}

.logout-mark {
    display: flex;
    max-width: 100%;
    margin: 0;
    flex-direction: column;
    font: 900 clamp(82px, 13vw, 210px)/.64 "Arial Narrow", Arial, Helvetica, sans-serif;
    letter-spacing: -.095em;
    text-transform: uppercase;
}

.logout-mark span:first-child { color: #000; }

.logout-mark span:last-child {
    color: transparent;
    transform: translateX(.16em);
    -webkit-text-stroke: clamp(2px, .25vw, 5px) #000;
}

.brand-panel p {
    max-width: 470px;
    margin: clamp(34px, 6vh, 70px) 0 0;
    padding: 13px 0 0 16px;
    border-top: 1px solid #000;
    border-left: 6px solid #000;
    font: 14px/1.6 Arial, Helvetica, sans-serif;
}

.window {
    min-width: 0;
    border: 2px solid;
    border-color: var(--light) var(--black) var(--black) var(--light);
    background: var(--window);
    box-shadow: inset 1px 1px var(--mid), inset -1px -1px var(--shadow), 12px 12px 0 rgba(0,0,0,.18);
}

.game-window {
    align-self: center;
    padding: 2px;
}

.title-bar {
    display: flex;
    min-height: 27px;
    align-items: center;
    justify-content: space-between;
    padding: 2px 3px 2px 5px;
    background: linear-gradient(90deg, var(--navy), #1084d0);
    color: #fff;
    font-size: 12px;
}

.title-copy { display: flex; align-items: center; gap: 6px; }

.app-icon {
    display: grid;
    width: 18px;
    height: 17px;
    place-items: center;
    border: 1px solid #fff;
    background: #000;
    color: var(--phosphor);
    font: bold 9px Arial, sans-serif;
}

.window-buttons { display: flex; gap: 2px; }

.window-buttons span {
    display: grid;
    width: 19px;
    height: 18px;
    place-items: center;
    border: 2px solid;
    border-color: var(--light) var(--black) var(--black) var(--light);
    background: var(--window);
    color: #000;
    font: bold 12px/1 Arial, sans-serif;
}

.game-menu {
    display: flex;
    gap: 16px;
    align-items: center;
    min-height: 30px;
    padding: 3px 6px;
    border-bottom: 1px solid var(--shadow);
    font-size: 11px;
}

.game-menu span:last-child {
    margin-left: auto;
    padding: 2px 6px;
    background: #000;
    color: var(--phosphor);
    font: 10px "Courier New", monospace;
}

.game-screen {
    position: relative;
    margin: 6px;
    border: 3px inset var(--window);
    background: var(--screen);
    aspect-ratio: 1;
    overflow: hidden;
}

#snake-board {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--screen);
    image-rendering: pixelated;
    touch-action: none;
}

.game-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 30px;
    background: rgba(0,0,0,.76);
    color: #fff;
    text-align: center;
}

.game-overlay[hidden] { display: none; }

.game-overlay strong {
    font: 900 clamp(30px, 5vw, 66px)/.85 "Arial Narrow", Arial, sans-serif;
    letter-spacing: -.05em;
}

.game-overlay span {
    margin: 15px 0 23px;
    color: #ccc;
    font: 10px "Courier New", monospace;
}

.game-overlay button,
.d-pad button,
.sound-panel button {
    padding: 7px 10px;
    border: 2px solid;
    border-color: var(--light) var(--black) var(--black) var(--light);
    background: var(--window);
    color: #000;
    font-weight: bold;
}

.game-overlay button:active,
.d-pad button:active,
.sound-panel button:active {
    border-color: var(--black) var(--light) var(--light) var(--black);
}

.game-lower {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 10px;
    padding: 0 6px 6px;
}

.d-pad {
    display: grid;
    grid-template-columns: repeat(3, 38px);
    grid-template-rows: repeat(2, 34px);
    place-content: center;
}

.d-pad button { padding: 0; }
.d-pad button[data-direction="up"] { grid-column: 2; }
.d-pad button[data-direction="left"] { grid-column: 1; grid-row: 2; }
.d-pad button[data-direction="down"] { grid-column: 2; grid-row: 2; }
.d-pad button[data-direction="right"] { grid-column: 3; grid-row: 2; }

.sound-panel {
    min-width: 0;
    padding: 7px 9px;
    border: 2px inset var(--window);
    background: #0c241b;
    color: #d8ff44;
    font: 10px/1.35 "Courier New", monospace;
}

.sound-panel > span { color: #8fa58e; }

.sound-panel > strong {
    display: block;
    min-height: 28px;
    margin: 4px 0 7px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sound-panel div { display: flex; gap: 4px; }
.sound-panel button { padding: 4px 7px; font-size: 9px; }

.status-bar {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3px;
    padding: 3px 4px;
}

.status-bar span {
    min-width: 0;
    padding: 3px 5px;
    border: 1px inset var(--window);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 10px;
}

.archive-links {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

.archive-links a {
    padding: 9px 10px;
    border: 2px solid;
    border-color: var(--light) var(--black) var(--black) var(--light);
    background: var(--window);
    color: #000;
    text-align: center;
    text-decoration: none;
    font-size: 10px;
    font-weight: bold;
}

.archive-links a:active {
    border-color: var(--black) var(--light) var(--light) var(--black);
}

.home-footer {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding-top: 10px;
    border-top: 1px solid #000;
    font: 9px "Courier New", monospace;
    letter-spacing: .08em;
}

.home-footer span:last-child { display: flex; gap: 16px; }

.audio-engine {
    position: fixed;
    width: 1px;
    height: 1px;
    left: -20px;
    bottom: -20px;
    overflow: hidden;
}

.audio-engine iframe { width: 1px; height: 1px; border: 0; }

@media (max-width: 980px) {
    .home-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto auto;
        max-width: 760px;
    }

    .brand-panel { padding: 5vh 0 2vh; }
    .logout-mark { font-size: clamp(92px, 26vw, 190px); }
    .brand-panel p { margin-top: 42px; }
    .archive-links, .home-footer { grid-column: 1; }
}

@media (max-width: 560px) {
    .home-shell { gap: 18px; padding: 12px; }
    .brand-panel { padding-top: 24px; }
    .brand-index { margin-bottom: 25px; }
    .logout-mark { font-size: clamp(76px, 29vw, 142px); }
    .brand-panel p { margin-top: 34px; font-size: 13px; }
    .game-lower { grid-template-columns: 1fr; }
    .d-pad { order: 2; }
    .archive-links { grid-template-columns: 1fr 1fr; }
    .home-footer { flex-direction: column; gap: 8px; }
    .status-bar { grid-template-columns: 1fr; }
    .status-bar span:last-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
    }
}