/* The about site's look, shared by its pages. The colours are the game's
   (web/src/ui/theme.css). */
:root {
  --charcoal: #121512;
  --panel: #181d19;
  --raised: #202821;
  --line: #245c36;
  --green: #33ff66;
  --dim: #1fa846;
  --soft: #a9d8b5;
  --bright: #d9ffe3;
  --amber: #ffb000;
  --cyan: #3fd0e8;
  --faint: #4f7a5b;
  --bronze: #d08d55;
  --silver: #c5d3cc;
  --gold: #f2c94c;
  --display: "VT323", "Cascadia Mono", Consolas, monospace;
  --body: "IBM Plex Sans", system-ui, sans-serif;
  --code: "IBM Plex Mono", "Cascadia Mono", Consolas, monospace;
  --measure: 34rem;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--charcoal);
  color: var(--soft);
  font: 400 1.0625rem/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: var(--green); text-underline-offset: 3px; }
a:hover { color: var(--bright); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--display); font-weight: 400; color: var(--bright); margin: 0; }
h2 { font-size: clamp(2.6rem, 5vw, 3.6rem); line-height: 1; margin-bottom: 18px; text-shadow: 0 0 18px rgba(51, 255, 102, .25); }
h3 { font-size: 1.9rem; line-height: 1.05; margin-bottom: 8px; }
p { margin: 0 0 14px; max-width: var(--measure); }
section { padding: 104px 0; border-top: 1px solid var(--raised); }
.lede { font-size: 1.15rem; color: var(--soft); }

/* ---- Header ---- */
.top { position: sticky; top: 0; z-index: 10; background: rgba(18, 21, 18, .92); backdrop-filter: blur(6px); border-bottom: 1px solid var(--raised); }
.top .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--bright); text-decoration: none; font: 1.6rem/1 var(--display); }
.brand img { width: 26px; height: 26px; }
.top nav { margin-left: auto; display: flex; gap: 22px; font-size: .95rem; }
.top nav a { color: var(--soft); text-decoration: none; }
.top nav a:hover { color: var(--green); }

/* ---- Hero ---- */
.hero { padding: 72px 0 96px; border-top: 0; }
.hero .wrap.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: 64px; align-items: center; }
.hero h1 {
  font-size: clamp(3.4rem, 6.4vw, 6rem);
  line-height: .9;
  color: var(--green);
  text-shadow: 0 0 2px rgba(51, 255, 102, .8), 0 0 28px rgba(51, 255, 102, .35);
  margin-bottom: 26px;
}
.hero h1 .cursor { display: inline-block; width: .4em; height: .62em; margin-left: .12em; background: var(--green); vertical-align: -.06em; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.stores { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.store {
  display: inline-flex; flex-direction: column; justify-content: center;
  min-width: 196px; padding: 10px 20px; border: 1px solid var(--green);
  color: var(--bright); text-decoration: none; background: var(--panel);
  font: 500 1.05rem/1.2 var(--body);
}
.store small { font-size: .78rem; color: var(--dim); font-weight: 400; }
.store:hover { background: var(--green); color: var(--charcoal); }
.store:hover small { color: var(--charcoal); }
.also { font-size: .95rem; color: var(--faint); }
.also a { color: var(--dim); }

/* The screen: the one loud thing on the page. */
.crt {
  position: relative; padding: 22px; border-radius: 26px;
  background: linear-gradient(160deg, #2a322b, #171c18 60%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06), 0 30px 80px rgba(0, 0, 0, .55), 0 0 120px rgba(51, 255, 102, .12);
}
.crt .screen {
  position: relative; overflow: hidden; border-radius: 14px; background: var(--charcoal);
  box-shadow: inset 0 0 0 2px #0e110e, 0 0 26px rgba(51, 255, 102, .28);
  aspect-ratio: 480 / 392;
  animation: power-on 1.1s cubic-bezier(.2, .8, .2, 1) .2s both;
}
.crt .screen img { width: 100%; height: 100%; image-rendering: pixelated; }
.crt .screen::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    repeating-linear-gradient(to bottom, rgba(0, 0, 0, .22) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, .45) 100%);
}
@keyframes power-on {
  0% { transform: scale(1, .004); filter: brightness(4); opacity: .2; }
  45% { transform: scale(1, .004); filter: brightness(4); opacity: 1; }
  70% { transform: scale(1, 1); filter: brightness(1.8); }
  100% { transform: scale(1, 1); filter: none; }
}
.crt figcaption { margin-top: 14px; font-size: .9rem; color: var(--faint); text-align: center; }
.facts { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--raised); }
.facts div { font-size: .92rem; color: var(--faint); }
.facts b { display: block; font: 2.4rem/1 var(--display); color: var(--bright); font-weight: 400; }

/* ---- Steps: a real sequence, so numbered ---- */
.steps { list-style: none; padding: 0; margin: 48px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.steps li { display: flex; flex-direction: column; }
.phone {
  border: 1px solid var(--line); border-radius: 22px; padding: 8px; background: var(--panel);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .4);
}
.phone img { border-radius: 15px; width: 100%; height: auto; }
.steps .n { font: 3.2rem/1 var(--display); color: var(--amber); margin: 22px 0 4px; }
.steps p { font-size: .98rem; }

/* ---- The code ---- */
.code-row { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 56px; align-items: start; margin-top: 44px; }
pre.program {
  margin: 0; padding: 20px 0; background: var(--panel); border: 1px solid var(--line);
  font: 400 .9rem/1.65 var(--code); color: var(--green); overflow-x: auto; counter-reset: line 10;
  white-space: normal;
}
pre.program span.row { display: block; padding: 0 20px 0 0; white-space: pre; min-height: 1.65em; width: max-content; min-width: 100%; }
pre.program span.row::before { counter-increment: line; content: counter(line); display: inline-block; width: 3.4em; padding-right: 1.2em; text-align: right; color: var(--faint); }
pre.program span.row.on { background: rgba(51, 255, 102, .14); }
pre.program .k { color: var(--bright); }
pre.program .n { color: var(--amber); }
pre.program .c { color: var(--faint); }
pre.program .l { color: var(--cyan); }
.code-row .side { display: grid; grid-template-columns: minmax(0, 1fr) 190px; gap: 24px; align-items: start; }
.code-note { font-size: .9rem; color: var(--faint); margin-top: 12px; }

/* ---- The classes: a staircase ---- */
.ladder { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; align-items: end; margin-top: 48px; }
.rung { border: 1px solid var(--line); background: var(--panel); padding: 26px 24px 24px; border-top: 4px solid var(--metal); }
.rung.bronze { --metal: var(--bronze); }
.rung.silver { --metal: var(--silver); padding-top: 70px; }
.rung.gold { --metal: var(--gold); padding-top: 116px; }
.rung h3 { color: var(--metal); font-size: 2.6rem; }
.rung dl { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; margin: 14px 0 16px; font-size: .95rem; }
.rung dt { color: var(--faint); }
.rung dd { margin: 0; color: var(--bright); font-family: var(--code); font-size: .9rem; text-align: right; }
.rung p { font-size: .95rem; margin: 0; }

/* ---- Competing ---- */
.ways { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 56px; margin-top: 44px; }
.ways div { border-left: 2px solid var(--line); padding-left: 22px; }
.twists { color: var(--bright); }

/* ---- The same everywhere ---- */
.print { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.fingerprint { font: clamp(2.6rem, 6vw, 4.6rem)/1 var(--display); color: var(--amber); text-shadow: 0 0 22px rgba(255, 176, 0, .3); word-break: break-all; }
.platforms { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 16px; color: var(--dim); font-size: .95rem; list-style: none; padding: 0; }

/* ---- Price ---- */
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: 44px; }
.plan { border: 1px solid var(--line); background: var(--panel); padding: 30px; }
.plan.paid { border-color: var(--green); box-shadow: 0 0 40px rgba(51, 255, 102, .08); }
.plan .price { font: 2.6rem/1 var(--display); color: var(--bright); margin: 6px 0 14px; }
.plan ul { margin: 0 0 14px; padding-left: 1.1em; }
.plan li { margin: 4px 0; }
.plan li::marker { color: var(--green); }
.small { font-size: .88rem; color: var(--faint); }

/* ---- Support and footer ---- */
.support { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; }
.support ul { list-style: none; padding: 0; margin: 0; }
.support li { padding: 10px 0; border-bottom: 1px solid var(--raised); }
footer { padding: 32px 0 48px; border-top: 1px solid var(--raised); font-size: .88rem; color: var(--faint); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 28px; }

@media (max-width: 960px) {
  .hero .wrap.split, .code-row, .print, .support { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ladder { grid-template-columns: minmax(0, 1fr); }
  .rung.silver, .rung.gold { padding-top: 26px; }
  .ways, .plans { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 620px) {
  .wrap { padding: 0 16px; }
  .top nav { display: none; }
  section { padding: 72px 0; }
  .hero { padding: 40px 0 64px; }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .steps { gap: 44px; }
  .steps .phone { max-width: 260px; }
  .code-row .side { grid-template-columns: minmax(0, 1fr); }
  .code-row .side .phone { max-width: 220px; }
  .crt { padding: 12px; border-radius: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .crt .screen, .hero h1 .cursor { animation: none; }
}

/* ---- The support page ---- */
.page-head { padding-top: 64px; padding-bottom: 40px; }
.page-head h1 { font-size: clamp(3.2rem, 6vw, 5rem); line-height: .95; color: var(--green); text-shadow: 0 0 2px rgba(51, 255, 102, .8), 0 0 28px rgba(51, 255, 102, .35); margin-bottom: 18px; }
.contact { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 48px; align-items: start; }
.contact .mail { font: 2.2rem/1 var(--display); }
.contact ul { margin: 0; padding-left: 1.1em; }
.contact li { margin: 4px 0; }
.contact li::marker { color: var(--green); }
.links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 32px; list-style: none; padding: 0; margin: 32px 0 0; }
.links li { border-bottom: 1px solid var(--raised); padding: 14px 0; }
.links a { font-weight: 500; }
.links span { display: block; font-size: .9rem; color: var(--faint); }
.faq-group { padding: 56px 0 8px; }
.faq-group h2 { font-size: clamp(2.2rem, 4vw, 2.8rem); margin-bottom: 14px; }
.faq details { border-bottom: 1px solid var(--raised); max-width: 46rem; }
.faq summary { cursor: pointer; list-style: none; padding: 16px 32px 16px 0; position: relative; color: var(--bright); font-weight: 500; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 10px; font: 1.8rem/1 var(--display); color: var(--green); }
.faq details[open] summary::after { content: "\2212"; }
.faq details > div { padding: 0 0 18px; }
.faq details p:last-child { margin-bottom: 0; }
.faq kbd { font: 500 .85em var(--code); color: var(--bright); background: var(--raised); border: 1px solid var(--line); padding: 1px 6px; }
.toc { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 8px; font-size: .95rem; }

@media (max-width: 960px) {
  .contact { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .links { grid-template-columns: minmax(0, 1fr); }
}