/* CLIFF JUMP — about page. The page is the shaft: rock walls with spikes on
   both edges, a starry gap between, altitude markers that count down to the
   lava at the bottom. Colours are the game's Pyxel palette. */
:root {
  --black: #000000; --navy: #2b335f; --purple: #7e2072; --teal: #19959c; --brown: #8b4852;
  --rock: #395c98; --sky: #a9c1ff; --white: #eeeeee; --lava: #d4186c; --orange: #d38441;
  --gem: #e9c35b; --mint: #70c6a9; --ice: #7696de; --grey: #a3a3a3; --pink: #ff9798;
  --pixel: 'DotGothic16', 'Hiragino Kaku Gothic ProN', monospace;
  --en: 'Press Start 2P', monospace;
  --px: 'Pixelify Sans', 'Press Start 2P', monospace;
  --wall: 34px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--black); }
body {
  margin: 0; color: var(--white); font: 16px/1.85 var(--pixel); letter-spacing: .02em;
  background-color: var(--black);
  background-image:
    radial-gradient(1px 1px at 18% 12%, var(--white) 98%, transparent),
    radial-gradient(1px 1px at 72% 26%, var(--grey) 98%, transparent),
    radial-gradient(1px 1px at 44% 58%, var(--ice) 98%, transparent),
    radial-gradient(1px 1px at 86% 74%, var(--grey) 98%, transparent),
    radial-gradient(1px 1px at 30% 88%, var(--white) 98%, transparent);
  background-size: 360px 360px;
  position: relative; overflow-x: hidden;
}

/* ---- the two rock walls, running the full height of the page ---- */
body::before, body::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: var(--wall); z-index: 0; pointer-events: none;
  /* the game's wall: blue rock, a dark seam every block, grey and black specks */
  background-color: var(--rock);
  background-image:
    linear-gradient(var(--navy) 0 2px, transparent 2px),
    radial-gradient(circle at 2px 2px, var(--grey) 1.5px, transparent 1.6px),
    radial-gradient(circle at 2px 2px, var(--black) 1.5px, transparent 1.6px);
  background-size: 100% 32px, 30px 46px, 26px 38px;
  background-position: 0 0, 6px 10px, 16px 26px;
}
body::before { left: 0; border-right: 2px solid var(--grey); }
body::after { right: 0; border-left: 2px solid var(--grey); }
/* spikes come in clusters, like the walls in play */
.spikes { position: absolute; top: 0; bottom: 0; width: 12px; z-index: 0; pointer-events: none; }
.spikes.l { left: calc(var(--wall) + 2px); background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='16' shape-rendering='crispEdges'%3E%3Cpath d='M0 2h4v1h4v1h4v1H8v1H4v1H0z' fill='%23a9c1ff'/%3E%3Cpath d='M0 6h4v1H0z' fill='%237696de'/%3E%3C/svg%3E") 0 0 / 12px 16px repeat-y;
  -webkit-mask: repeating-linear-gradient(transparent 0 380px, #000 380px 444px, transparent 444px 1020px, #000 1020px 1052px, transparent 1052px 1500px);
          mask: repeating-linear-gradient(transparent 0 380px, #000 380px 444px, transparent 444px 1020px, #000 1020px 1052px, transparent 1052px 1500px); }
.spikes.r { right: calc(var(--wall) + 2px); background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='16' shape-rendering='crispEdges'%3E%3Cpath d='M12 2H8v1H4v1H0v1h4v1h4v1h4z' fill='%23a9c1ff'/%3E%3Cpath d='M12 6H8v1h4z' fill='%237696de'/%3E%3C/svg%3E") 0 0 / 12px 16px repeat-y;
  -webkit-mask: repeating-linear-gradient(transparent 0 720px, #000 720px 768px, transparent 768px 1240px, #000 1240px 1320px, transparent 1320px 1700px);
          mask: repeating-linear-gradient(transparent 0 720px, #000 720px 768px, transparent 768px 1240px, #000 1240px 1320px, transparent 1320px 1700px); }
@media (max-width: 640px) { :root { --wall: 10px; } .spikes { width: 6px; background-size: 6px 8px !important; } body::before, body::after { background-size: 100% 20px, 30px 46px, 26px 38px; } }

main, footer { position: relative; z-index: 1; }
img.pix { image-rendering: pixelated; image-rendering: crisp-edges; display: block; width: 100%; height: auto; }
a { color: var(--gem); }
figure { margin: 0; }
.wrap { width: min(1000px, 100% - 2 * var(--wall) - 64px); margin: 0 auto; }
@media (max-width: 640px) { .wrap { width: calc(100% - 2 * var(--wall) - 28px); } }

/* ---- altitude marker: like the game's 100m milestone line ---- */
.alt { display: flex; align-items: center; gap: 12px; font: 13px/1 var(--px); color: var(--gem); letter-spacing: .08em; margin: 0 0 18px; }
.alt::after { content: ""; flex: 1; height: 0; border-top: 2px dashed rgba(233, 195, 91, .45); }
.alt b { font-family: var(--en); font-size: 11px; font-weight: 400; color: var(--black); background: var(--gem); padding: 5px 7px 4px; }
h2 { font-size: clamp(24px, 4vw, 34px); line-height: 1.35; margin: 0 0 20px; font-weight: 400; }
h2 .hl { color: var(--gem); }
h3 { font-size: 18px; margin: 0 0 6px; font-weight: 400; color: var(--sky); }
p { margin: 0 0 1em; }
section { padding: 64px 0; }

kbd { display: inline-block; min-width: 22px; padding: 2px 6px 1px; margin: 0 2px 2px 0; text-align: center; font: 13px/1.4 var(--pixel); color: var(--white); background: var(--navy); border: 1px solid var(--ice); box-shadow: 0 2px 0 var(--black); }

/* ---- the game's game-over box: navy fill, grey frame ---- */
.box { background: var(--navy); border: 1px solid var(--grey); box-shadow: 0 0 0 3px var(--black), 0 0 0 4px var(--rock); padding: 20px 22px; }
.shot { border: 2px solid var(--ice); box-shadow: 0 0 0 3px var(--black), 0 0 0 5px var(--rock), 0 16px 36px rgba(0, 0, 0, .6); background: var(--black); }
.cap { font-size: 12px; line-height: 1.6; color: var(--grey); margin-top: 12px; text-align: center; }

/* ---- buttons: RETRY (blue) and TITLE (purple) from the game-over box ---- */
.btn { display: inline-block; font: 15px/1 var(--pixel); letter-spacing: .1em; text-decoration: none; padding: 16px 24px 14px; color: var(--white); background: var(--ice); border: 1px solid var(--white); box-shadow: 0 0 0 3px var(--black), 0 5px 0 3px var(--navy); }
.btn.sub { background: var(--purple); }
.btn:hover { color: var(--navy); background: var(--gem); }
.btn:focus-visible, a:focus-visible { outline: 2px solid var(--gem); outline-offset: 5px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 28px; }

/* ---- hero: the mountain emblem and the two-line logo ---- */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.emblem { width: 72px; height: 44px; margin-bottom: 18px;
  background: linear-gradient(135deg, transparent 50%, var(--navy) 50%) 0 100% / 50% 60% no-repeat,
              conic-gradient(from 150deg at 50% 0, var(--white) 0 60deg, transparent 0) 0 0 / 100% 45% no-repeat,
              conic-gradient(from 150deg at 50% 0, var(--rock) 0 60deg, transparent 0); }
.logo { margin: 0; font: clamp(40px, 7vw, 72px)/1.1 var(--en); }
.logo span { display: block; text-shadow: 4px 4px 0 var(--navy), -2px -2px 0 var(--black); }
.logo .a { color: var(--gem); }
.logo .b { color: var(--orange); margin-top: 6px; }
.tagline { font: 12px/1.6 var(--en); color: var(--ice); margin: 20px 0 22px; letter-spacing: .04em; }
.hero .lead { font-size: 17px; }
.hero-art { width: min(320px, 100%); justify-self: center; }
@media (max-width: 820px) { .hero .wrap { grid-template-columns: 1fr; } .hero-art { width: min(260px, 72%); } }

/* ---- layouts ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step .n { font: 20px var(--en); color: var(--gem); display: block; margin-bottom: 10px; }
.step p { font-size: 15px; margin: 0; }
.split { display: grid; grid-template-columns: 240px 1fr; gap: 36px; align-items: start; }
.split.rev { grid-template-columns: 1fr 240px; }
.split.rev > figure { order: 2; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } .split, .split.rev { grid-template-columns: 1fr; } .split > figure, .split.rev > figure { order: 0; width: min(240px, 70%); margin: 0 auto; } }

/* ---- wall gimmicks: a pixel icon per row ---- */
.gims { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.gims li { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start; }
.gims h3 { margin: 0 0 2px; }
.gims p { margin: 0; font-size: 15px; }
.ic { width: 44px; height: 44px; background: var(--black); border: 1px solid var(--rock); position: relative; image-rendering: pixelated; }
.ic::before { content: ""; position: absolute; inset: 0; margin: auto; }
.ic.spike::before { width: 0; height: 0; border-top: 9px solid transparent; border-bottom: 9px solid transparent; border-left: 14px solid var(--sky); left: 0; right: auto; top: 0; bottom: 0; margin: auto 0; box-shadow: none; }
.ic.spike { background: linear-gradient(90deg, var(--rock) 0 10px, var(--black) 10px); }
.ic.spike::before { left: 10px; }
.ic.crumb { background: linear-gradient(90deg, var(--rock) 0 14px, var(--black) 14px); }
.ic.crumb::before { left: 0; right: auto; width: 14px; height: 24px; margin: auto 0; background: var(--navy);
  -webkit-mask: linear-gradient(90deg, #000 0 3px, transparent 3px 5px, #000 5px); mask: linear-gradient(90deg, #000 0 3px, transparent 3px 5px, #000 5px); }
.ic.bounce::before { width: 20px; height: 5px; background: var(--mint); box-shadow: 0 2px 0 var(--teal); }
.ic.gem::before { width: 14px; height: 14px; background: var(--gem); transform: rotate(45deg); box-shadow: inset -3px -3px 0 var(--orange); }
.ic.lava { background: linear-gradient(transparent 55%, var(--lava) 55%); }
.ic.lava::before { width: 100%; height: 4px; top: 55%; bottom: auto; margin: -3px 0 0; background: repeating-linear-gradient(90deg, var(--lava) 0 4px, transparent 4px 7px); }

/* ---- score table ---- */
.facts { width: 100%; border-collapse: collapse; font-size: 15px; }
.facts th { text-align: left; font-weight: 400; color: var(--sky); padding: 10px 14px 10px 0; white-space: nowrap; vertical-align: top; width: 9em; }
.facts td { padding: 10px 0; border-bottom: 1px dashed var(--navy); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 820px) { .grid2 { grid-template-columns: 1fr; } }
.box h3 .m { font-family: var(--en); font-size: 11px; color: var(--black); background: var(--lava); padding: 3px 6px 2px; margin-left: 8px; vertical-align: 2px; }
.box h3 .m.n { background: var(--white); }

.tips { list-style: none; margin: 0; padding: 0; }
.tips li { position: relative; padding: 11px 0 11px 28px; border-bottom: 1px dashed var(--navy); }
.tips li::before { content: ""; position: absolute; left: 3px; top: 21px; width: 9px; height: 9px; background: var(--gem); transform: rotate(45deg); box-shadow: inset -2px -2px 0 var(--orange); }
.faq dt { color: var(--gem); margin-top: 18px; }
.faq dd { margin: 4px 0 0; }

/* ---- bottom of the shaft: the lava ---- */
.final { text-align: center; padding: 90px 0 120px; background: linear-gradient(transparent 0, rgba(212, 24, 108, .18) 55%, rgba(212, 24, 108, .55) 100%); position: relative; }
.final::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 26px;
  background: repeating-linear-gradient(90deg, var(--lava) 0 6px, transparent 6px 9px, var(--lava) 9px 13px, transparent 13px 15px) 0 0 / 100% 6px no-repeat, linear-gradient(transparent 6px, var(--lava) 6px); }
.final .alt { justify-content: center; }
.final .alt::after { display: none; }
.final .cta-row { justify-content: center; }
.warn { font: 12px var(--en); color: var(--lava); letter-spacing: .1em; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.games-nav { margin-top: 26px; font-size: 14px; }
.games-nav a { color: var(--white); }
footer { background: var(--lava); color: var(--white); padding: 22px 0 34px; font-size: 13px; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer a { color: var(--white); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .warn { animation: none; } }