:root {
    --ok: #33ff99;
    --ok-rgb: 51, 255, 153;
    --bad: #ff3352;
    --bad-rgb: 255, 51, 82;
    --pixel: "Press Start 2P", monospace;
    --mono: "IBM Plex Mono", Consolas, monospace;
}
.screen { --ph: #ffb000; --ph-dim: #d6973a; --ph-faint: #4a3208; --ph-rgb: 255, 176, 0; --bg: #150d02; }

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: #000; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { -webkit-tap-highlight-color: transparent; }
body { font: 500 18px/1.55 var(--mono); }

.screen {
    position: relative; min-height: 100vh; color: var(--ph);
    --glow: 0 0 1px rgba(var(--ph-rgb), .95), 0 0 12px rgba(var(--ph-rgb), .45);
    --glow-ok: 0 0 1px rgba(var(--ok-rgb), .95), 0 0 12px rgba(var(--ok-rgb), .45);
    --glow-bad: 0 0 1px rgba(var(--bad-rgb), .95), 0 0 12px rgba(var(--bad-rgb), .55);
    background: radial-gradient(ellipse at 50% 45%, var(--bg) 0%, #050403 60%, #010101 100%);
    animation: flicker 7s infinite; text-shadow: var(--glow);
}
.poweron .screen { animation: flicker 7s infinite, poweron 1.1s ease-out; }
@keyframes flicker { 0%, 97%, 100% { opacity: 1; } 97.6% { opacity: .9; } 98.4% { opacity: .97; } }
@keyframes poweron { 0% { filter: brightness(4); transform: scaleY(.006) scaleX(.6); } 45% { transform: scaleY(.006) scaleX(1); } 70% { filter: brightness(2); transform: none; } 100% { filter: none; } }
.screen::before { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 30; background: repeating-linear-gradient(0deg, rgba(0, 0, 0, .22) 0 2px, transparent 2px 4px); }
.vignette { position: fixed; inset: 0; z-index: 31; pointer-events: none; background: radial-gradient(ellipse 78% 74% at 50% 50%, transparent 68%, rgba(0, 0, 0, .5) 88%, rgba(0, 0, 0, .88) 100%); }

.content { position: relative; z-index: 2; max-width: 1100px; margin: 0 auto; padding: 48px 72px 64px; }

a { color: var(--ph); }
a:active { background: var(--ph); color: #000; text-shadow: none; text-decoration: none; }
@media (hover: hover) {
    a:hover { background: var(--ph); color: #000; text-shadow: none; text-decoration: none; }
    .ascii a:hover { background: none; color: var(--ph); text-shadow: var(--glow); }
    .nav a:hover, .linkbtn:hover { color: var(--ph); background: none; text-shadow: var(--glow); }
    .opt:hover, label.code-line:hover { background: rgba(var(--ph-rgb), .1); }
    .btn:hover { background: var(--ph); color: #000; text-shadow: none; }
    .btn.bad-btn:hover { background: var(--bad); color: #000; }
    a.heat-cell:hover { outline: 1px solid var(--ph); }
}
h1, h2, h3 { margin: 0; font-weight: 700; }
h1 { font-size: 27px; margin: 6px 0 14px; }
h2 { font-size: 20px; margin: 26px 0 12px; }
p { margin: 0 0 12px; }
ul, ol { margin: 0 0 12px; padding-left: 0; list-style: none; }

.dim { color: var(--ph-dim); text-shadow: none; }
.faint { color: var(--ph-faint); text-shadow: none; }

::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: #0b0803; border-left: 1px solid #4a3208; }
::-webkit-scrollbar-thumb { background: #4a3208; border: 3px solid #0b0803; box-shadow: inset 0 0 0 1px #d6973a; }
::-webkit-scrollbar-thumb:hover { background: #d6973a; }
::-webkit-scrollbar-thumb:active { background: #ffb000; }
::-webkit-scrollbar-corner { background: #0b0803; }
::-webkit-scrollbar-button { display: none; }
@supports not selector(::-webkit-scrollbar) {
    * { scrollbar-color: #d6973a #0b0803; scrollbar-width: thin; }
}
.meter {
    display: inline-block;
    height: 0.8em;
    margin: 0 2px;
    vertical-align: -0.05em;
    background: repeating-linear-gradient(90deg, var(--ph-faint) 0 calc(1ch - 2px), transparent calc(1ch - 2px) 1ch);
}
.meter-fill {
    display: block;
    height: 100%;
    background: repeating-linear-gradient(90deg, var(--ph) 0 calc(1ch - 2px), transparent calc(1ch - 2px) 1ch);
    filter: drop-shadow(0 0 3px rgba(var(--ph-rgb), 0.6));
}
.streak-line { margin: 0 0 6px; }
.gate { max-width: 560px; }
.captcha-img { display: block; max-width: 100%; height: auto; margin: 4px 0 8px; border: 1px dashed var(--ph-faint); }
.heat-wrap { overflow-x: auto; padding: 4px 0 8px; margin: 0 0 14px; }
.heat { display: flex; gap: 3px; width: max-content; }
.heat-col { display: flex; flex-direction: column; gap: 3px; width: 12px; }
.heat-labels { width: 22px; margin-right: 2px; }
.heat-month, .heat-label { height: 12px; font-size: 10px; line-height: 12px; color: var(--ph-dim); text-shadow: none; white-space: nowrap; overflow: visible; }
.heat-month { height: 14px; }
.heat-cell { display: inline-block; width: 12px; height: 12px; box-sizing: border-box; text-decoration: none !important; }
.heat-none { visibility: hidden; }
.heat-0 { border: 1px solid rgba(var(--ph-rgb), 0.12); background: rgba(var(--ph-rgb), 0.03); }
.heat-1 { background: rgba(var(--ph-rgb), 0.25); }
.heat-2 { background: rgba(var(--ph-rgb), 0.45); }
.heat-3 { background: rgba(var(--ph-rgb), 0.7); box-shadow: 0 0 3px rgba(var(--ph-rgb), 0.4); }
.heat-4 { background: var(--ph); box-shadow: 0 0 5px rgba(var(--ph-rgb), 0.8); }
.heat-sel { outline: 2px solid var(--ok) !important; outline-offset: 1px; }
.heat-legend { display: flex; align-items: center; gap: 4px; margin-top: 8px; flex-wrap: wrap; }
.ok { color: var(--ok); text-shadow: var(--glow-ok); }
.bad { color: var(--bad); text-shadow: var(--glow-bad); }
.strike { color: var(--bad); text-shadow: var(--glow-bad); text-decoration: line-through; }
.pixel { font-family: var(--pixel); font-weight: normal; }
.small { font-size: 15px; }

.ascii { white-space: pre; font: 600 16px/1.3 var(--mono); margin: 0 0 12px; overflow: hidden; }
.ascii a { text-decoration: none; }
.ascii a:active { background: none; color: var(--ph); text-shadow: var(--glow); }
.ascii-narrow, .m-only { display: none; }
.nav { color: var(--ph-dim); margin-bottom: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 16px; text-shadow: none; }
.nav a, .linkbtn { color: var(--ph-dim); text-decoration: none; margin-right: 14px; text-shadow: none; }
.nav a.on, .nav a:active, .linkbtn:active { color: var(--ph); background: none; text-shadow: var(--glow); }
.nav-user { margin-right: 14px; }
.linkbtn { background: none; border: 0; padding: 0; font: inherit; cursor: pointer; }
.inline { display: inline; margin: 0; }
[hidden] { display: none !important; }
@media (display-mode: standalone) {
    .content { padding-top: max(48px, calc(env(safe-area-inset-top) + 16px)); padding-bottom: max(64px, calc(env(safe-area-inset-bottom) + 24px)); }
}
@media (display-mode: standalone) and (max-width: 760px) {
    .content { padding-top: calc(env(safe-area-inset-top) + 16px); }
}

.prompt { color: var(--ok); text-shadow: var(--glow-ok); }
.cmdline { color: var(--ph-dim); margin-bottom: 6px; text-shadow: none; }
.cmdline .prompt { margin-right: 8px; }

.box { border: 1px dashed var(--ph-faint); padding: 18px 22px; margin: 0 0 22px; position: relative; }
.box[data-label]::before { content: " " attr(data-label) " "; position: absolute; top: -9px; left: 16px; background: #050403; padding: 0 6px; font: 10px var(--pixel); color: var(--ph-dim); text-shadow: none; }
.box.err { border-color: rgba(var(--bad-rgb), .7); background: rgba(var(--bad-rgb), .05); }
.box.err::before { color: var(--bad); text-shadow: var(--glow-bad); }
.box.good { border-color: rgba(var(--ok-rgb), .6); background: rgba(var(--ok-rgb), .04); }
.box.good::before { color: var(--ok); text-shadow: var(--glow-ok); }
.box .title { font: 20px/1.4 var(--pixel); margin: 4px 0 10px; }
.box.err .title { color: var(--bad); text-shadow: var(--glow-bad); animation: blinkhard 1.2s steps(1) 3; }
.box.good .title { color: var(--ok); text-shadow: var(--glow-ok); }
@keyframes blinkhard { 50% { opacity: 0; } }
.kv { display: grid; grid-template-columns: 140px 1fr; gap: 0 10px; }
.kv > .dim { white-space: nowrap; }
.pre { white-space: pre-wrap; }

.bar { margin-bottom: 18px; font-weight: 500; white-space: nowrap; overflow: hidden; }
.meter { white-space: pre; }

.question { font-size: 27px; font-weight: 700; margin: 6px 0 18px; white-space: pre-wrap; }
.typed.typing::after { content: "█"; animation: blink 1s steps(1) infinite; margin-left: 2px; }
.cursor::after { content: "█"; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.opt { display: block; padding: 4px 12px; margin: 0 -12px 2px; cursor: pointer; }
.opt input { position: absolute; opacity: 0; pointer-events: none; }
.opt:has(input:checked) { background: var(--ph); color: #000; text-shadow: none; box-shadow: 0 0 22px rgba(var(--ph-rgb), .5); }
.opt .mark::before { content: "( )"; }
.opt:has(input:checked) .mark::before { content: "(•)"; }
.opt-inline { display: inline-block; margin: 0 6px 6px 0; }

.code { border: 1px solid var(--ph-faint); background: rgba(0, 0, 0, .35); margin: 0 0 18px; padding: 10px 0; font: 500 17px/1.6 var(--mono); overflow-x: auto; }
.code-line { display: flex; white-space: pre; padding: 0 16px 0 0; }
.code-line .ln { width: 48px; flex: none; text-align: right; padding-right: 14px; margin-right: 12px; color: var(--ph-dim); border-right: 1px solid var(--ph-faint); text-shadow: none; user-select: none; }
label.code-line { cursor: pointer; }
label.code-line input { position: absolute; opacity: 0; pointer-events: none; }
label.code-line:has(input:checked) { background: var(--ph); color: #000; text-shadow: none; box-shadow: 0 0 22px rgba(var(--ph-rgb), .45); }
label.code-line:has(input:checked) .ln { color: #000; border-color: #000; }
.code-line.hl-bad { background: rgba(var(--bad-rgb), .12); }
.code-line.hl-bad .ln { color: var(--bad); }
.code-line.hl-ok { background: rgba(var(--ok-rgb), .1); }
.code-line.hl-ok .ln { color: var(--ok); }

.field { margin-bottom: 14px; }
.field label { display: block; color: var(--ph-dim); text-shadow: none; font-size: 15px; margin-bottom: 4px; }
.input { display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--ph-dim); padding: 2px 0; }
.input:focus-within { border-color: var(--ph); box-shadow: 0 1px 0 var(--ph); }
.input input, .input textarea, select {
    flex: 1; min-width: 0; background: none; border: 0; outline: none; color: var(--ph); caret-color: var(--ph);
    font: 500 18px/1.55 var(--mono); text-shadow: var(--glow); padding: 4px 0;
}
.input textarea { resize: vertical; min-height: 2.2em; white-space: pre; }
.input:has(.answer-input) { align-items: flex-start; }
.input:has(.answer-input) .prompt { padding-top: 4px; }
.input textarea.answer-input { resize: none; min-height: 0; overflow: hidden; white-space: pre-wrap; overflow-wrap: anywhere; }
.input input::placeholder { color: var(--ph-faint); text-shadow: none; }
.input input:-webkit-autofill,
.input input:-webkit-autofill:hover,
.input input:-webkit-autofill:focus,
.input input:-webkit-autofill:active {
    -webkit-text-fill-color: var(--ph);
    caret-color: var(--ph);
    -webkit-box-shadow: 0 0 0 1000px #050403 inset;
    box-shadow: 0 0 0 1000px #050403 inset;
    transition: background-color 600000s 0s, color 600000s 0s;
    font: 500 18px/1.55 var(--mono);
}
.input input:autofill { background: transparent; }
.check input { appearance: none; width: 14px; height: 14px; border: 1px solid var(--ph-dim); vertical-align: -2px; margin-right: 6px; background: none; cursor: pointer; }
.check input:checked { background: var(--ph); box-shadow: 0 0 8px rgba(var(--ph-rgb), .6); }
.noselect { -webkit-user-select: none; user-select: none; }
.field .bad, .errors { font-size: 15px; }
.check { color: var(--ph-dim); text-shadow: none; cursor: pointer; }
.check input { accent-color: var(--ph); }

.actions { margin-top: 24px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-block; background: none; border: 1px solid var(--ph); color: var(--ph); font: 11px/1.4 var(--pixel); padding: 9px 18px; cursor: pointer; text-decoration: none; text-shadow: var(--glow); box-shadow: 0 0 14px rgba(var(--ph-rgb), .35), inset 0 0 12px rgba(var(--ph-rgb), .15); }
.btn:active { background: var(--ph); color: #000; text-shadow: none; }
.btn.bad-btn { border-color: var(--bad); color: var(--bad); text-shadow: var(--glow-bad); box-shadow: 0 0 14px rgba(var(--bad-rgb), .35); }
.btn.bad-btn:active { background: var(--bad); color: #000; }
.keys { color: var(--ph-dim); font-size: 14px; margin-left: auto; text-shadow: none; }

.tbl { width: 100%; border-collapse: collapse; margin: 0 0 22px; }
.tbl th { text-align: left; color: var(--ph-dim); font-weight: 500; font-size: 15px; text-shadow: none; border-bottom: 1px dashed var(--ph-faint); padding: 6px 12px 6px 0; }
.tbl td { padding: 6px 12px 6px 0; border-bottom: 1px dashed var(--ph-faint); vertical-align: top; }

.list > li { padding: 10px 0; border-bottom: 1px dashed var(--ph-faint); }
.list > li:last-child { border-bottom: 0; }

.content.with-ref { max-width: 1640px; }
.with-ref .quiz-grid { display: grid; grid-template-columns: minmax(0, 1fr) 500px; gap: 40px; align-items: start; }
.with-ref .quiz-grid:has(.ref.collapsed) { grid-template-columns: minmax(0, 1fr) 200px; }
.quiz-main { min-width: 0; }
.help-mark { color: var(--ph-dim); }

.ref { position: sticky; top: 24px; height: 440px; max-height: calc(100vh - 48px); display: flex; flex-direction: column; border: 1px dashed var(--ph-faint); background: rgba(0, 0, 0, .3); font-size: 15px; line-height: 1.5; }
.ref-head { display: flex; justify-content: space-between; align-items: center; padding: 8px 14px; border-bottom: 1px dashed var(--ph-faint); font: 10px var(--pixel); color: var(--ph-dim); text-shadow: none; }
.ref-head .linkbtn { margin: 0; font: 15px var(--mono); }
.ref-out { flex: 1; overflow-y: auto; padding: 10px 14px; white-space: pre-wrap; word-break: break-word; scrollbar-width: thin; scrollbar-color: var(--ph-faint) transparent; }
.ref-out { white-space: normal; }
.ref-out > div { min-height: 1.5em; white-space: pre-wrap; }
.ref-out > .ref-help { white-space: normal; }
.ref-cmd { margin-top: 10px; color: var(--ph); }
.ref-top { display: flex; justify-content: space-between; margin: 6px 0 4px; font-weight: 700; }
.ref-h { margin-top: 10px; font-weight: 700; }
.ref-ind { padding-left: 2ch; }
.ref-ind:has(.ref-key) { display: grid; grid-template-columns: minmax(9ch, max-content) 1fr; gap: 0 2ch; }
.ref-key { color: var(--ok); text-shadow: var(--glow-ok); white-space: pre; }
.ref-row { white-space: pre; overflow: hidden; text-overflow: ellipsis; }
.ref-link { text-decoration: none; }
.ref-input { margin: 0; padding: 6px 14px; border-top: 1px dashed var(--ph-faint); border-bottom: 0; }
.ref-input input { font-size: 16px; }
.ref-help { display: grid; grid-template-columns: max-content 1fr; gap: 0 3ch; margin: 1.5em 0; white-space: normal; }
.ref-gap { margin-top: 1.5em; }
.ref-head .linkbtn + .linkbtn { margin-left: 10px; }
.ref-frame { flex: 1; width: 100%; min-height: 0; border: 0; background: #050403; }
.ref-frame[hidden], .ref-out[hidden] { display: none; }
.ref-type { color: var(--ph-dim); text-shadow: none; }
.ref.collapsed { height: auto; }
.ref.collapsed .ref-out, .ref.collapsed .ref-input, .ref.collapsed .ref-frame { display: none; }

@media (max-width: 1180px) {
    .with-ref .quiz-grid, .with-ref .quiz-grid:has(.ref.collapsed) { grid-template-columns: minmax(0, 1fr); }
    .ref { position: static; height: 400px; margin-top: 30px; }
}

@media (max-width: 760px) {
    .content { padding: 16px max(16px, env(safe-area-inset-right)) 40px max(16px, env(safe-area-inset-left)); font-size: 16px; }
    .ascii { font-size: 12px; margin-bottom: 8px; }
    .ascii-wide, .hide-m { display: none; }
    .ascii-narrow { display: block; }
    .m-only { display: inline; }

    .nav { font-size: 15px; margin-bottom: 14px; row-gap: 0; }
    .nav a, .nav .linkbtn { display: inline-block; padding: 8px 0; margin-right: 12px; }
    .nav-user { margin-right: 10px; }

    h1, .question { font-size: 20px; line-height: 1.4; }
    h1 { margin-bottom: 12px; }
    h2 { font-size: 17px; margin: 22px 0 10px; }
    .small { font-size: 14px; }
    .cmdline { font-size: 14px; word-break: break-all; }

    .box { padding: 16px 14px; margin-bottom: 18px; }
    .box .title { font-size: 14px; }
    .kv { grid-template-columns: 1fr; }
    .kv > :nth-child(odd):not(:first-child) { margin-top: 8px; }
    .kv > :nth-child(odd) { font-size: 13px; }

    .bar { white-space: normal; line-height: 1.9; margin-bottom: 12px; font-size: 15px; }

    .opt { padding: 11px 12px; margin: 0 0 6px; border: 1px dashed rgba(var(--ph-rgb), .2); }
    .opt-inline { padding: 9px 14px; margin: 0 6px 8px 0; min-width: 58px; text-align: center; }

    .code { font-size: 14px; padding: 6px 0; }
    .code-line { white-space: pre-wrap; overflow-wrap: anywhere; }
    .code-line .ln { width: 34px; padding-right: 8px; margin-right: 8px; }
    label.code-line { padding-top: 7px; padding-bottom: 7px; border-bottom: 1px dashed rgba(var(--ph-rgb), .08); }

    .actions { gap: 12px; }
    .actions .btn, .actions form.inline { flex: 1 1 100%; text-align: center; }
    .actions form.inline .btn { width: 100%; }
    .btn { font-size: 12px; padding: 15px 18px; }
    .quiz-actions { position: sticky; bottom: 0; z-index: 5; margin: 18px -16px 0; padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); background: rgba(5, 4, 3, .96); border-top: 1px dashed var(--ph-faint); }
    .quiz-actions .help-mark { flex-basis: 100%; text-align: center; }
    .keys { display: none; }

    .tbl { font-size: 15px; }
    .tbl-cards, .tbl-cards tbody { display: block; }
    .tbl-cards tr:has(th) { display: none; }
    .tbl-cards tr { display: grid; grid-template-columns: 1fr auto; align-items: baseline; gap: 4px 14px; padding: 12px 0; border-bottom: 1px dashed var(--ph-faint); }
    .tbl-cards.cols-3 tr { grid-template-columns: 1fr auto auto; }
    .tbl-cards td { padding: 0; border: 0; }
    .tbl-cards .m-full { grid-column: 1 / -1; }
    .tbl-cards .m-last { order: 10; }
    .tbl-cards .small-m { font-size: 13px; }
    .tbl-scroll { overflow-x: auto; margin: 0 0 22px; }
    .tbl-scroll .tbl { margin: 0; white-space: nowrap; }

    .heat-wrap { margin-right: -16px; padding-right: 16px; }

    .ref { height: 70vh; margin-top: 24px; font-size: 14px; }
    .ref-head { padding: 4px 10px; }
    .ref-head .linkbtn { padding: 8px 4px; }
    .ref-out { padding: 8px 10px; }
    .ref-input { padding: 6px 10px; }
}

@media (max-width: 380px) {
    .ascii { font-size: 11px; }
    .content { font-size: 15px; }
}