:root {
    --stack-ink: #151515;
    --stack-paper: #fbf8ed;
    --stack-yellow: #ffd526;
    --stack-red: #ef5b4c;
    --stack-green: #69a66f;
    --stack-blue: #5d88b6;
    --stack-purple: #8c70a7;
}

.stack-page {
    color: var(--stack-ink);
    overflow-x: hidden;
}

.stack-shell {
    width: min(1180px, calc(100% - 34px));
}

.stack-main {
    padding: 74px 0 48px;
}

.stack-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
    margin: 0 auto 44px;
    max-width: 1020px;
}

.stack-heading h1 {
    margin: 8px 0 14px;
    font-family: "Kalam", cursive;
    font-size: clamp(4.2rem, 9vw, 8.2rem);
    font-weight: 700;
    line-height: .68;
    letter-spacing: -.07em;
    transform: rotate(-1deg);
}

.stack-heading h1 span {
    color: transparent;
    -webkit-text-stroke: 3px var(--stack-ink);
    text-shadow: 5px 5px 0 rgba(255, 213, 38, .8);
}

.stack-heading > div > p:last-child {
    margin: 24px 0 0;
    font-family: "Space Mono", monospace;
    font-size: .86rem;
    line-height: 1.65;
}

.stack-heading-note {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 220px;
    padding: 10px 13px;
    border: 2px dashed var(--stack-ink);
    background: rgba(255, 213, 38, .2);
    font: 700 .72rem/1.35 "Space Mono", monospace;
    transform: rotate(2deg);
}

.stack-heading-note img {
    width: 58px;
    height: 58px;
    object-fit: contain;
    filter: grayscale(.15);
}

.stack-card {
    position: relative;
    max-width: 1060px;
    margin: 0 auto;
    padding: 22px;
    border: 3px solid var(--stack-ink);
    border-radius: 9px 13px 8px 14px;
    background:
        linear-gradient(rgba(37, 54, 47, .05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 54, 47, .05) 1px, transparent 1px),
        var(--stack-paper);
    background-size: 22px 22px;
    box-shadow: 10px 12px 0 rgba(21, 21, 21, .12);
}

.stack-tape {
    position: absolute;
    z-index: 3;
    top: -16px;
    width: 116px;
    height: 29px;
    border: 1px solid rgba(77, 66, 34, .14);
    background: rgba(231, 222, 190, .82);
    box-shadow: 0 2px 3px rgba(0, 0, 0, .08);
}

.stack-tape--left { left: 72px; transform: rotate(-3deg); }
.stack-tape--right { right: 72px; transform: rotate(3deg); }

.stack-toolbar,
.stack-controls,
.stack-panel-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.stack-toolbar {
    margin-bottom: 18px;
    padding-bottom: 15px;
    border-bottom: 2px dashed rgba(21, 21, 21, .36);
}

.stack-file,
.stack-side > span,
.stack-panel-heading span,
.stack-incident-readout span {
    display: block;
    margin-bottom: 4px;
    color: #69655a;
    font: 700 .62rem/1.2 "Space Mono", monospace;
    letter-spacing: .11em;
}

.stack-toolbar h2,
.stack-panel-heading h2 {
    margin: 0;
    font-family: "Kalam", cursive;
    line-height: 1;
}

.stack-toolbar h2 { font-size: 1.6rem; }
.stack-panel-heading h2 { font-size: 1.35rem; }

.stack-scoreboard {
    display: flex;
    gap: 18px;
    padding: 10px 13px;
    border: 2px solid var(--stack-ink);
    background: #171a18;
    color: #f8f3df;
    box-shadow: 4px 4px 0 var(--stack-yellow);
    font: 700 .58rem/1.1 "Space Mono", monospace;
}

.stack-scoreboard strong {
    display: block;
    margin-top: 5px;
    color: var(--stack-yellow);
    font-size: 1.08rem;
    letter-spacing: .08em;
}

.stack-console {
    display: grid;
    grid-template-columns: minmax(100px, 1fr) minmax(240px, 320px) minmax(100px, 1fr);
    align-items: start;
    gap: 18px;
    max-width: 760px;
    margin: 0 auto;
}

.stack-board-wrap {
    position: relative;
    min-width: 0;
    border: 3px solid var(--stack-ink);
    border-radius: 5px 8px 4px 7px;
    background: #f4f0e2;
    box-shadow: 6px 7px 0 rgba(21, 21, 21, .16);
    overflow: hidden;
}

#stack-canvas {
    display: block;
    width: 100%;
    aspect-ratio: 1 / 2;
    background: #f8f4e8;
    touch-action: none;
}

#stack-canvas:focus-visible {
    outline: 4px solid var(--stack-yellow);
    outline-offset: -5px;
}

.stack-overlay {
    position: absolute;
    inset: 0;
    z-index: 4;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 22px;
    background: rgba(251, 248, 237, .92);
    backdrop-filter: blur(3px);
    text-align: center;
}

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

.stack-overlay > img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 5px;
    animation: stackStickerIn .55s cubic-bezier(.22, 1.4, .36, 1) both;
}

.stack-kicker {
    margin: 0 0 4px;
    padding: 3px 7px;
    background: var(--stack-yellow);
    font: 700 .58rem/1 "Space Mono", monospace;
    transform: rotate(-2deg);
}

#stack-overlay-title {
    margin: 8px 0 13px;
    font: 700 1.18rem/1.15 "Kalam", cursive;
}

.stack-identity {
    display: grid;
    width: min(100%, 236px);
    gap: 7px;
    text-align: left;
}

.stack-identity label,
.stack-identity small,
.stack-name-error {
    font-family: "Space Mono", monospace;
    font-size: .63rem;
}

.stack-identity label { font-weight: 700; }
.stack-identity small { color: #676256; }
.stack-name-error { min-height: 2.2em; color: #a52f25; }

.stack-identity input {
    width: 100%;
    border: 2px solid var(--stack-ink);
    border-radius: 3px;
    background: #fffdf6;
    padding: 9px 10px;
    color: var(--stack-ink);
    font: 700 .8rem "Space Mono", monospace;
}

.stack-primary,
.stack-secondary,
.stack-controls button,
.stack-touch-controls button,
.stack-panel-heading button {
    border: 2px solid var(--stack-ink);
    border-radius: 3px 6px 3px 5px;
    background: #fffdf6;
    color: var(--stack-ink);
    cursor: pointer;
    font: 700 .69rem "Space Mono", monospace;
    box-shadow: 3px 3px 0 var(--stack-ink);
    transition: transform .14s ease, box-shadow .14s ease, background .14s ease;
}

.stack-primary,
.stack-secondary { padding: 9px 11px; }
.stack-primary { background: var(--stack-yellow); }
.stack-secondary { background: #fffdf6; }

.stack-primary:hover,
.stack-secondary:hover,
.stack-controls button:hover,
.stack-touch-controls button:hover,
.stack-panel-heading button:hover {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--stack-ink);
}

.stack-primary:disabled {
    cursor: not-allowed;
    filter: grayscale(1);
    opacity: .5;
    transform: none;
}

.stack-side {
    align-self: start;
    min-width: 0;
    padding: 12px 10px;
    border: 2px dashed rgba(21, 21, 21, .58);
    background: rgba(255, 253, 246, .78);
    text-align: center;
}

.stack-side--hold { transform: rotate(-1deg); }
.stack-side--next { transform: rotate(1deg); }

.stack-side p {
    margin: 8px 0 0;
    color: #676256;
    font: .58rem/1.7 "Space Mono", monospace;
}

.stack-piece-preview,
.stack-mini-piece {
    display: grid;
    grid-template-columns: repeat(4, 14px);
    grid-template-rows: repeat(4, 14px);
    justify-content: center;
    min-height: 58px;
    margin: 8px auto;
}

.stack-next-preview {
    display: grid;
    gap: 5px;
}

.stack-mini-cell {
    width: 13px;
    height: 13px;
    border: 1px solid var(--stack-ink);
    background: var(--piece-color, var(--stack-blue));
    box-shadow: inset 2px 2px 0 rgba(255, 255, 255, .36);
}

.stack-mini-cell[data-special]::after {
    content: "!";
    display: block;
    font: 700 8px/12px "Space Mono", monospace;
}

.stack-incident-readout {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px dashed rgba(21, 21, 21, .45);
}

.stack-incident-readout strong {
    display: block;
    overflow-wrap: anywhere;
    color: #a52f25;
    font: 700 .68rem/1.3 "Space Mono", monospace;
}

.stack-controls {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 2px dashed rgba(21, 21, 21, .35);
}

.stack-controls p {
    margin: 0;
    font: .68rem/1.8 "Space Mono", monospace;
}

.stack-controls button,
.stack-panel-heading button { padding: 7px 10px; }

.stack-touch-controls {
    display: none;
    grid-template-columns: repeat(6, 1fr);
    gap: 7px;
    margin-top: 12px;
}

.stack-touch-controls button {
    min-height: 46px;
    padding: 7px 4px;
    touch-action: manipulation;
}

.stack-status {
    min-height: 1.7em;
    margin: 14px 0 0;
    color: #4f4a40;
    font: .68rem/1.5 "Space Mono", monospace;
}

.stack-below-game {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 24px;
    max-width: 1060px;
    margin: 30px auto 0;
}

.stack-leaderboard,
.stack-log-panel {
    padding: 20px;
    border: 2px solid var(--stack-ink);
    background: rgba(251, 248, 237, .9);
    box-shadow: 6px 7px 0 rgba(21, 21, 21, .11);
}

.stack-leaderboard { transform: rotate(-.25deg); }
.stack-log-panel { transform: rotate(.3deg); }

#stack-leaderboard-status,
#stack-personal-result {
    margin: 12px 0;
    color: #5e594f;
    font: .67rem/1.45 "Space Mono", monospace;
}

#stack-leaderboard-list,
#stack-event-log {
    margin: 13px 0 0;
    padding: 0;
    list-style: none;
    font-family: "Space Mono", monospace;
}

#stack-leaderboard-list li,
#stack-event-log li {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr) auto;
    gap: 9px;
    align-items: center;
    padding: 7px 3px;
    border-bottom: 1px dashed rgba(21, 21, 21, .24);
    font-size: .7rem;
}

#stack-event-log li { grid-template-columns: 28px minmax(0, 1fr); }
#stack-event-log li span { color: #8b8577; }

.stack-legend {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 7px;
    margin-top: 16px;
    padding-top: 13px;
    border-top: 2px dashed rgba(21, 21, 21, .3);
    font: .58rem/1.35 "Space Mono", monospace;
}

.stack-legend b {
    display: inline-block;
    padding: 1px 3px;
    background: var(--stack-yellow);
}

.stack-console[data-incident="500"] .stack-board-wrap {
    animation: stackIncidentPulse 1s steps(2, end) infinite;
}

.stack-console[data-state="running"] .stack-side--next {
    animation: stackQueueWobble 5s ease-in-out infinite;
}

@keyframes stackStickerIn {
    from { opacity: 0; transform: scale(.65) rotate(-12deg); }
    to { opacity: 1; transform: scale(1) rotate(2deg); }
}

@keyframes stackIncidentPulse {
    50% { box-shadow: 6px 7px 0 rgba(239, 91, 76, .62); }
}

@keyframes stackQueueWobble {
    0%, 100% { transform: rotate(1deg); }
    50% { transform: rotate(-.5deg); }
}

@media (max-width: 820px) {
    .stack-main { padding-top: 48px; }
    .stack-heading { align-items: center; }
    .stack-heading-note { width: 190px; }
    .stack-card { padding: 16px; }
    .stack-console { grid-template-columns: 82px minmax(220px, 300px) 82px; gap: 10px; }
    .stack-scoreboard { gap: 10px; }
    .stack-piece-preview, .stack-mini-piece {
        grid-template-columns: repeat(4, 11px);
        grid-template-rows: repeat(4, 11px);
    }
    .stack-mini-cell { width: 10px; height: 10px; }
}

@media (max-width: 640px) {
    .stack-shell { width: min(100% - 20px, 440px); }
    .stack-main { padding-top: 38px; }
    .stack-heading { display: block; margin-bottom: 30px; }
    .stack-heading h1 { font-size: clamp(4rem, 21vw, 6.3rem); }
    .stack-heading-note { width: fit-content; margin: 24px 0 0 auto; }
    .stack-toolbar { align-items: flex-start; }
    .stack-toolbar h2 { font-size: 1.28rem; }
    .stack-scoreboard { display: grid; grid-template-columns: repeat(3, 1fr); padding: 8px; }
    .stack-scoreboard strong { font-size: .78rem; }
    .stack-console {
        grid-template-columns: 1fr 1fr;
        max-width: 360px;
    }
    .stack-board-wrap { grid-column: 1 / -1; grid-row: 1; width: min(100%, 320px); margin: auto; }
    .stack-side { grid-row: 2; }
    .stack-side--hold { grid-column: 1; }
    .stack-side--next { grid-column: 2; }
    .stack-controls { align-items: flex-start; }
    .stack-controls p { max-width: 75%; font-size: .58rem; }
    .stack-touch-controls { display: grid; }
    .stack-below-game { grid-template-columns: 1fr; }
    .stack-leaderboard, .stack-log-panel { padding: 16px; }
}

@media (pointer: coarse) {
    .stack-touch-controls { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
    .stack-overlay > img,
    .stack-console[data-incident="500"] .stack-board-wrap,
    .stack-console[data-state="running"] .stack-side--next {
        animation: none !important;
    }
    .stack-primary,
    .stack-secondary,
    .stack-controls button,
    .stack-touch-controls button,
    .stack-panel-heading button {
        transition: none;
    }
}