/* Air Superiority — download page. Colours from the game's UI sprites: HUD green #5cff7a, amber #ffb020,
   warning red #ff5a1f, panel #0a1410. No web fonts (strict CSP): the system's monospace does the HUD type. */
:root {
  color-scheme: dark;
  --bg: #07100c;
  --panel: #0a1410;
  --panel-2: #0f1c16;
  --line: #1d3a2a;
  --hud: #5cff7a;
  --hud-dim: #2f9a48;
  --amber: #ffb020;
  --red: #ff5a1f;
  --red-dark: #3a0d00;
  --text: #dff7e4;
  --muted: #8fb39a;
  --mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 var(--sans); }
body { padding-bottom: env(safe-area-inset-bottom); overflow-x: hidden; }
img { max-width: 100%; height: auto; }
a { color: var(--hud); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--hud); color: #04140a; padding: 8px 12px; z-index: 10; font: 700 14px var(--mono); }
.skip:focus { left: 8px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

/* ---------------------------------------------------------------- hero: flying over the desert */
.hero { position: relative; overflow: hidden; min-height: 100svh; display: grid; place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 16px 40px; isolation: isolate; }
.ground { position: absolute; inset: -512px 0 0 0; z-index: -3; background: url(/assets/img/sand.webp) 0 0 / 384px 384px repeat;
  filter: brightness(.42) saturate(.85); animation: fly 14s linear infinite; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -2;
  background: radial-gradient(ellipse at 50% 42%, rgba(7,16,12,.15), rgba(7,16,12,.75) 70%),
              linear-gradient(to bottom, rgba(7,16,12,.55), transparent 22%, transparent 70%, var(--bg));
  pointer-events: none; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .5;
  background: repeating-linear-gradient(to bottom, rgba(92,255,122,.035) 0 1px, transparent 1px 4px); }
@keyframes fly { from { transform: translateY(0); } to { transform: translateY(384px); } }
.clouds img { position: absolute; z-index: -1; opacity: .5; width: 340px; pointer-events: none; animation: drift 11s linear infinite; }
.clouds .c1 { left: -60px; animation-delay: -2s; }
.clouds .c2 { right: -90px; width: 420px; animation-duration: 15s; animation-delay: -9s; opacity: .38; }
.clouds .c3 { left: 40%; width: 260px; animation-duration: 9s; animation-delay: -5s; opacity: .28; }
@keyframes drift { from { top: -320px; } to { top: 110%; } }
.hud-corner { position: absolute; top: max(14px, env(safe-area-inset-top)); font: 700 11px/1.5 var(--mono); letter-spacing: .14em;
  color: var(--hud); opacity: .75; text-shadow: 0 0 8px rgba(92,255,122,.45); }
.hud-corner.tl { left: 16px; } .hud-corner.tr { right: 16px; text-align: right; }
.blink { color: var(--red); animation: blink 1.6s steps(2) infinite; }
@keyframes blink { 50% { opacity: .2; } }

.hero-in { width: min(560px, 100%); display: grid; justify-items: center; text-align: center; gap: 6px; }
h1 { margin: 0; line-height: 0; }
.logo { width: min(400px, 80vw); filter: drop-shadow(0 0 18px rgba(92,255,122,.25)); }
.tagline { margin: 10px 0 0; font: 700 13px/1.4 var(--mono); letter-spacing: .28em; text-transform: uppercase; color: var(--amber); }

.flight { position: relative; width: 210px; height: 250px; margin: 14px 0 4px; }
.flight .jet { position: absolute; inset: 0; display: grid; place-items: center; animation: bob 4.5s ease-in-out infinite; }
.flight .plane { width: 150px; position: relative; z-index: 1; filter: drop-shadow(0 0 1px rgba(0,0,0,.6)); }
.flight .burn { position: absolute; width: 22px; left: 50%; top: 79%; transform: translateX(-50%); z-index: 0;
  filter: drop-shadow(0 0 8px rgba(255,176,32,.9)); animation: burn .12s steps(2) infinite; }
.flight .shadow { position: absolute; width: 120px; left: 62%; top: 48%; opacity: .5; filter: blur(2px); animation: bob 4.5s ease-in-out infinite reverse; }
@keyframes bob { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(4px, -8px); } }
@keyframes burn { 50% { opacity: .65; transform: translateX(-50%) scaleY(.85); } }
.lock { position: absolute; inset: 4px 12px; animation: lock 3.2s ease-in-out infinite; }
.lock i { position: absolute; width: 26px; height: 26px; border: 3px solid var(--hud); filter: drop-shadow(0 0 4px rgba(92,255,122,.6)); }
.lock i:nth-child(1) { left: 0; top: 0; border-right: 0; border-bottom: 0; }
.lock i:nth-child(2) { right: 0; top: 0; border-left: 0; border-bottom: 0; }
.lock i:nth-child(3) { left: 0; bottom: 0; border-right: 0; border-top: 0; }
.lock i:nth-child(4) { right: 0; bottom: 0; border-left: 0; border-top: 0; }
@keyframes lock { 0%, 100% { inset: 4px 12px; opacity: 1; } 50% { inset: 18px 26px; opacity: .7; } }

/* the download button: the game's bright green button, HUD corners */
.dl { width: 100%; display: grid; justify-items: center; gap: 8px; margin-top: 6px; }
.btn-dl { position: relative; display: grid; gap: 2px; justify-items: center; width: min(420px, 100%); padding: 16px 20px 14px;
  background: var(--hud); color: #04140a; text-decoration: none; border: 0; cursor: pointer;
  box-shadow: 0 0 0 1px rgba(92,255,122,.4), 0 0 28px rgba(92,255,122,.35), inset 0 -4px 0 rgba(0,0,0,.18);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px); }
.btn-dl:hover { background: #8dffa3; }
.btn-dl:active { transform: translateY(1px); }
.btn-dl .b-main { font: 800 20px/1.15 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.btn-dl .b-sub { font: 700 12px/1.3 var(--mono); letter-spacing: .14em; text-transform: uppercase; opacity: .78; }
.btn-dl[aria-disabled="true"] { background: #23362b; color: var(--muted); box-shadow: 0 0 0 1px var(--line); cursor: default; }
.btn-dl.private { background: var(--amber); box-shadow: 0 0 0 1px rgba(255,176,32,.4), 0 0 28px rgba(255,176,32,.3), inset 0 -4px 0 rgba(0,0,0,.18); }
.dl-meta { margin: 0; font: 600 13px/1.5 var(--mono); color: var(--muted); letter-spacing: .04em; }
.dl-meta b { color: var(--text); font-weight: 700; }
.dl-alt { margin: 0; font: 600 13px/1.5 var(--mono); }
.notice { margin: 4px 0 0; width: min(420px, 100%); padding: 8px 12px; border: 1px solid var(--red); background: rgba(58,13,0,.8);
  color: #ffd2bf; font: 700 13px/1.45 var(--mono); letter-spacing: .03em; }
.private-tag { margin: 0; padding: 5px 10px; border: 1px solid var(--amber); color: var(--amber); background: rgba(40,26,0,.75);
  font: 800 11px/1.3 var(--mono); letter-spacing: .16em; }

/* ---------------------------------------------------------------- sections */
.sec { width: min(960px, 100%); margin: 0 auto; padding: 0 16px 28px; }
.panel { position: relative; background: rgba(10,20,16,.92); border: 1px solid var(--line); padding: 22px 20px 20px; }
.panel::before, .panel::after { content: ""; position: absolute; width: 22px; height: 22px; border: 3px solid var(--hud); pointer-events: none; }
.panel::before { left: -1px; top: -1px; border-right: 0; border-bottom: 0; }
.panel::after { right: -1px; bottom: -1px; border-left: 0; border-top: 0; }
h2, .sec-h { margin: 0 0 12px; font: 800 17px/1.3 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--hud); }
.slash { color: var(--amber); margin-right: 4px; }
.sec-h.warn { color: var(--red); margin-top: 26px; }
.sec-h.warn .slash { color: var(--red); }
.ver { color: var(--muted); font-size: 13px; letter-spacing: .08em; margin-left: 6px; }
.about { margin: 0 0 12px; white-space: pre-line; color: var(--text); }
.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.ticks li { position: relative; padding-left: 26px; font: 600 14px/1.5 var(--mono); }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 6px; width: 10px; height: 10px; border: 2px solid var(--hud); transform: rotate(45deg); }

.hangar { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.card { margin: 0; background: var(--panel); border: 1px solid var(--line); display: grid; grid-template-rows: auto 1fr; }
.card .pad { height: 190px; display: grid; place-items: center; padding: 14px;
  background: linear-gradient(rgba(7,16,12,.55), rgba(7,16,12,.85)), url(/assets/img/jungle.webp) center / 256px; }
.threats .card .pad { background: linear-gradient(rgba(7,16,12,.5), rgba(7,16,12,.85)), url(/assets/img/sand.webp) center / 256px; }
.card .pad img { max-height: 160px; width: auto; filter: drop-shadow(6px 10px 6px rgba(0,0,0,.55)); }
.card figcaption { padding: 10px 12px 12px; display: grid; gap: 2px; align-content: start; border-top: 2px solid var(--hud-dim); }
.card.red figcaption { border-top-color: #8a2a0e; }
.card b { font: 800 14px/1.3 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.card figcaption > span { color: var(--muted); font-size: 13px; }
.paints { display: flex; gap: 8px; margin-top: 8px; }
.paints button { width: 30px; height: 30px; border-radius: 50%; border: 2px solid var(--line); cursor: pointer; padding: 0; }
.paints button[aria-pressed="true"] { border-color: var(--hud); box-shadow: 0 0 0 2px rgba(92,255,122,.25); }
.p-std { background: linear-gradient(135deg, #9aa4ad, #59626b); }
.p-arc { background: linear-gradient(135deg, #f1f4f6, #a9b4bc); }
.p-des { background: linear-gradient(135deg, #d9bb86, #8f7446); }
.p-ngt { background: linear-gradient(135deg, #3d4247, #15181b); }

.notes p { margin: 0 0 10px; white-space: pre-line; }
.notes ul { margin: 0 0 10px; padding-left: 0; list-style: none; display: grid; gap: 4px; }
.notes li { position: relative; padding-left: 20px; }
.notes li::before { content: "›"; position: absolute; left: 4px; color: var(--amber); font-weight: 800; }

.steps { list-style: none; counter-reset: s; margin: 0 0 14px; padding: 0; display: grid; gap: 10px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.steps li { counter-increment: s; position: relative; padding: 12px 12px 12px 54px; background: var(--panel-2); border-left: 3px solid var(--hud-dim); min-height: 64px; }
.steps li::before { content: "0" counter(s); position: absolute; left: 12px; top: 11px; font: 800 20px/1 var(--mono); color: var(--amber); }
.steps b { display: block; font: 800 13px/1.4 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--hud); }
.steps span { display: block; font-size: 14px; color: var(--text); }
.req { margin: 0 0 8px; font: 600 14px/1.5 var(--mono); }
.req .k { color: var(--amber); letter-spacing: .14em; text-transform: uppercase; margin-right: 6px; font-size: 12px; }
.verify summary { cursor: pointer; color: var(--muted); font: 600 13px/1.6 var(--mono); }
.verify p { margin: 6px 0; font-size: 14px; color: var(--muted); }
.verify code { display: block; padding: 8px 10px; background: #000; border: 1px solid var(--line); color: var(--hud);
  font: 12px/1.5 var(--mono); word-break: break-all; }

.foot { display: grid; justify-items: center; gap: 6px; padding: 18px 16px 34px; text-align: center; color: var(--muted); font: 12px/1.5 var(--mono); letter-spacing: .04em; }
.foot img { opacity: .8; }
.foot p { margin: 0; }

@media (max-width: 720px) {
  .hangar { grid-template-columns: repeat(3, minmax(150px, 1fr)); overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 6px; }
  .hangar .card { scroll-snap-align: start; }
  .card .pad { height: 150px; }
  .card .pad img { max-height: 124px; }
  .steps { grid-template-columns: 1fr; }
  .hud-corner { font-size: 10px; }
}
@media (max-width: 380px) {
  .btn-dl .b-main { font-size: 17px; }
  .flight { height: 210px; }
  .flight .plane { width: 126px; }
}
@media (prefers-reduced-motion: reduce) {
  .ground, .clouds img, .flight .jet, .flight .shadow, .flight .burn, .lock, .blink { animation: none; }
  .clouds { display: none; }
}