/* © 2026 18cores, LLC. All rights reserved. */
:root {
  color-scheme: dark;
  --bg: #0b1119;
  --panel: #101923;
  --line: #26323c;
  --muted: #83949e;
  --ink: #eff5ed;
  --green: #bdff64;
  --orange: #ff9366;
  --mono: ui-monospace, SFMono-Regular, Consolas, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: Arial, Helvetica, sans-serif; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; color: inherit; }
button:disabled { cursor: default; opacity: .4; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }
a { color: inherit; text-decoration: none; }
.app { width: 100%; height: 100vh; height: 100dvh; padding: 0 12px 10px; display: flex; flex-direction: column; background: var(--bg); }
.header { flex: 0 0 46px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 900; font-size: 15px; letter-spacing: 1.5px; white-space: nowrap; }
.brand svg { width: 23px; height: 23px; fill: var(--green); }
.header-right { display: flex; align-items: center; gap: 8px; }
.volume-control { display: flex; align-items: center; gap: 6px; }
.volume-control input { width: 80px; margin: 0; accent-color: var(--green); cursor: pointer; }
.volume-control output { width: 30px; color: var(--muted); font: 9px var(--mono); }
.volume-control input:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }
.icon-button { border: 1px solid var(--line); background: transparent; padding: 6px 9px; border-radius: 4px; font-size: 14px; }
.icon-button span { font: 10px var(--mono); margin-left: 4px; }
.icon-button svg { width: 14px; height: 14px; vertical-align: -2px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.icon-button:hover { background: var(--panel); border-color: #546552; }
.control-button { border-color: transparent; }
.control-button i, .game-footer i { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--green); margin-right: 6px; }
.control-label { color: var(--muted); }
main { flex: 1; min-height: 0; }
.cabinet { width: 100%; height: 100%; display: grid; grid-template-rows: 50px minmax(0, 1fr) 30px; border: 1px solid #34434c; border-radius: 6px; overflow: hidden; background: #070c13; }
.hud { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 0 22px; background: #111b25; border-bottom: 1px solid var(--line); }
.hud > div { min-width: 90px; }
.hud span { display: block; font: 8px var(--mono); letter-spacing: 1.5px; color: var(--muted); margin-bottom: 4px; }
.hud strong { font: 19px var(--mono); letter-spacing: 2px; }
.hud-best strong { color: #a8bca0; }
.hud-center { text-align: center; }
.hud-center strong { font-size: 14px; }
.hud-center span { font-size: 10px; letter-spacing: 1px; transition: color .3s; }
.hud-center span.hot { color: var(--orange); }
.hud-lives { text-align: right; }
.hud-lives strong { color: var(--green); font-size: 18px; }
.screen { position: relative; min-height: 0; min-width: 0; overflow: hidden; background: #070c13; }
canvas { display: block; width: 100%; height: 100%; object-fit: contain; }
.screen::after { content: ''; position: absolute; inset: 0; pointer-events: none; background: repeating-linear-gradient(0deg, #0000 0, #0000 3px, #0002 4px); opacity: .23; }
.overlay { position: absolute; inset: 0; display: grid; place-items: center; background: radial-gradient(ellipse at center, #080f19ef 5%, #080f1980 75%); z-index: 2; text-align: center; overflow-y: auto; }
.overlay[hidden] { display: none; }
.overlay-content { padding: 24px; width: min(540px, 100%); max-height: 100%; }
.mission-tag { font: 9px var(--mono); letter-spacing: 2px; color: var(--green); margin-bottom: 23px; }
.hero-alien svg { height: 52px; width: 52px; color: var(--green); filter: drop-shadow(0 0 12px #bdff6499); }
h1 { font-size: clamp(30px, 4.2vw, 58px); letter-spacing: -2px; margin: 16px 0 10px; font-weight: 800; }
.overlay p { color: #9fb0bd; font-size: 13px; margin: 0 0 25px; line-height: 1.5; }
.primary-button { border: 0; border-radius: 4px; background: var(--green); color: #14200d; font-size: 13px; font-weight: 700; padding: 16px 24px; min-width: 230px; display: inline-flex; gap: 35px; align-items: center; justify-content: space-between; }
.primary-button:hover { background: #d1ff96; }
.primary-button span { font-size: 20px; line-height: 16px; }
#start-hint { display: block; font: 8px var(--mono); letter-spacing: 1px; color: #81919c; margin-top: 17px; }
.secondary-button { display: block; margin: 17px auto 0; border: 0; background: transparent; color: #aebbc4; font-size: 12px; }
.secondary-button[hidden] { display: none; }
.title-controls { font: 10px/1.7 var(--mono); color: var(--muted); margin-top: 24px; }
.title-controls span { margin: 0 7px; color: #455966; }
.game-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 0 16px; border-top: 1px solid var(--line); background: #111b25; }
.game-footer > span { font: 8px var(--mono); letter-spacing: 1px; color: #aab9c1; }
.game-footer .play-hint { color: #6d838e; }
.play-hint span { padding: 0 12px; }
.text-button { border: 0; background: transparent; font: 10px var(--mono); padding: 0; color: #cbd5d7; white-space: nowrap; }
.text-button:hover { color: var(--green); }
kbd { display: inline-block; border: 1px solid #35434d; border-radius: 3px; padding: 2px 4px; font: 8px var(--mono); color: #a4b4bf; margin-left: 8px; }
.toast { position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%); padding: 10px 18px; color: var(--green); background: #101b26e8; border: 1px solid #bdff6444; border-radius: 4px; font: 11px var(--mono); letter-spacing: 1px; opacity: 0; transition: opacity .15s; z-index: 4; max-width: 95%; text-align: center; pointer-events: none; }
.toast.visible { opacity: 1; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
dialog { background: #111b25; color: var(--ink); border: 1px solid #43524a; border-radius: 10px; padding: 32px; max-width: 480px; width: calc(100% - 32px); max-height: calc(100dvh - 32px); box-shadow: 0 24px 100px #0008; }
dialog::backdrop { background: #020710d9; }
.section-label { font: 10px var(--mono); letter-spacing: 1.5px; color: #bdc9cd; margin-bottom: 15px; }
dialog h2 { font-size: 32px; letter-spacing: -1px; margin: 20px 0 12px; }
dialog p { color: #a5b5be; font-size: 13px; line-height: 1.7; }
dialog small { display: block; font: 9px var(--mono); color: var(--muted); margin-top: 18px; }
#controller-help { font-size: 11px; }
#test-device { font: 11px/1.6 var(--mono); color: var(--green); overflow-wrap: anywhere; margin: 25px 0 18px; }
.test-indicators { display: flex; flex-wrap: wrap; gap: 10px; }
.test-indicators span { flex: 1 1 70px; text-align: center; border: 1px solid var(--line); padding: 16px 5px; font: 11px var(--mono); border-radius: 5px; }
.test-indicators .active { background: var(--green); color: #111b10; }
.test-detail { min-height: 40px; }
.app:fullscreen { padding: 0 6px 6px; }
.app:fullscreen .header { flex-basis: 38px; }
@media (max-width: 700px) {
  .app { padding: 0 6px 6px; }
  .header { flex-basis: 44px; gap: 5px; }
  .brand { font-size: 12px; letter-spacing: 1px; gap: 5px; }
  .brand svg { width: 19px; height: 19px; }
  .header-right { gap: 3px; }
  .volume-control input { width: 45px; }
  .volume-control output { display: none; }
  .icon-button { padding: 6px; }
  .icon-button > span { display: none; }
  .control-button::after { content: 'Controls'; font: 9px var(--mono); }
  .hud { padding: 0 10px; gap: 8px; }
  .hud > div { min-width: 0; }
  .hud span { font-size: 6px; letter-spacing: .6px; }
  .hud strong { font-size: 15px; letter-spacing: 1px; }
  .hud-center strong { font-size: 11px; }
  .hud-lives strong { font-size: 13px; }
  .game-footer { padding: 0 9px; }
  .game-footer > span { font-size: 7px; letter-spacing: .3px; }
  .game-footer .play-hint { display: none; }
  .overlay-content { padding: 20px 14px; }
  .title-controls { font-size: 8px; }
  .title-controls span { margin: 0 3px; }
  .toast { font-size: 9px; padding: 8px 12px; }
}
@media (max-height: 700px) {
  .overlay-content { padding-top: 16px; padding-bottom: 16px; }
  .hero-alien { display: none; }
  .mission-tag { margin-bottom: 10px; font-size: 8px; }
  h1 { font-size: 36px; margin-top: 10px; }
  .overlay p { margin-bottom: 16px; }
  .title-controls { margin-top: 15px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* Title-screen controls: readable key caps on a solid panel, so they hold up over any background. */
.mission-tag { display: none; }
#start-hint { font: 11px var(--mono); letter-spacing: 1px; color: #9aa9b4; margin-top: 18px; }
.title-controls { display: grid; gap: 10px; justify-items: center; font: 14px/1.5 Arial, Helvetica, sans-serif; color: #c9d4dc; margin-top: 24px; padding: 14px 20px; background: #080f19e6; border: 1px solid #1d2c38; border-radius: 10px; width: max-content; max-width: min(820px, calc(100vw - 32px)); position: relative; left: 50%; transform: translateX(-50%); }
.title-controls > div { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px 20px; }
.title-controls .act { display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; margin: 0; color: #d3dde4; }
.title-controls b { font: 10px var(--mono); letter-spacing: 1.5px; color: #7f909c; font-weight: normal; }
.title-controls kbd { display: inline-block; min-width: 26px; padding: 4px 7px; font: 12px/1.2 var(--mono); color: #eef4f8; background: #13202c; border: 1px solid #3a4c5a; border-bottom-width: 2px; border-radius: 5px; text-align: center; }
@media (max-height: 640px), (max-width: 620px) {
  .title-controls { font-size: 12px; padding: 10px 12px; gap: 6px; margin-top: 14px; }
  .title-controls > div { gap: 6px 12px; }
  .title-controls kbd { font-size: 11px; padding: 3px 5px; min-width: 22px; }
}
/* The menu must fit the screen exactly: no sideways scrolling or nudging on a phone. */
.overlay { overflow-x: hidden; grid-template-columns: minmax(0, 1fr); }
.overlay-content { box-sizing: border-box; max-width: 100%; }
@media (max-width: 620px) {
  .title-controls { width: auto; max-width: 100%; left: 0; transform: none; }
}

/* Touch play: shown after the first touch (data-input="touch" on the app), hidden again on a key or controller press. */
canvas { touch-action: none; -webkit-user-select: none; user-select: none; }
.title-controls .touch-row { display: none; }
.app[data-input="touch"] .title-controls > div:not(.touch-row) { display: none; }
.app[data-input="touch"] .title-controls .touch-row { display: flex; }
.app[data-input="touch"] #start-hint { display: none; }
/* On touch screens the footer's key hints and Pause give way to the controls drawn in the game. */
.app[data-input="touch"] .cabinet { grid-template-rows: 50px minmax(0, 1fr) 0; }
.app[data-input="touch"] .game-footer { display: none; }
@media (max-height: 520px) {
  .app[data-input="touch"] .header { flex-basis: 34px; }
  .app[data-input="touch"] .cabinet { grid-template-rows: 32px minmax(0, 1fr) 0; }
  .app[data-input="touch"] .hud span { font-size: 6px; margin-bottom: 1px; }
  .app[data-input="touch"] .hud strong { font-size: 13px; }
}
.hud { position: relative; }
.hud-tip { position: absolute; inset: 0; display: grid; place-items: center; background: #111b25; color: var(--green); font: 12px var(--mono); letter-spacing: 2px; opacity: 0; pointer-events: none; transition: opacity .4s; }
.hud.tip .hud-tip { opacity: 1; }
/* On touch screens the score bar is the pause button, and shows a pause icon so you can find it. */
.hud-pause { display: none; }
.app[data-input="touch"] .hud-pause { display: flex; gap: 4px; align-items: center; justify-content: center; flex: 0 0 34px; min-width: 0; height: 34px; border: 1px solid #3a4c5a; border-radius: 50%; }
.app[data-input="touch"] .hud-pause i { width: 4px; height: 12px; border-radius: 1px; background: #eef4f8; }
.app[data-input="touch"] .hud { cursor: pointer; }
/* Phones: the game always fills exactly the visible screen. No pinch or double-tap zoom, no page
   bounce or scroll, and nothing under a notch or rounded corner. */
html, body { height: 100%; overflow: hidden; overscroll-behavior: none; }
body { touch-action: manipulation; }
.overlay { touch-action: pan-y; }
.app { position: fixed; inset: 0; height: auto; padding-top: env(safe-area-inset-top); padding-left: max(12px, env(safe-area-inset-left)); padding-right: max(12px, env(safe-area-inset-right)); padding-bottom: max(10px, env(safe-area-inset-bottom)); }
@media (max-width: 700px) { .app { padding-left: max(6px, env(safe-area-inset-left)); padding-right: max(6px, env(safe-area-inset-right)); padding-bottom: max(6px, env(safe-area-inset-bottom)); } }
.title-controls .home-tip { display: none; }
.app[data-input="touch"][data-home-tip="yes"] .title-controls .home-tip { display: block; font-size: 13px; color: #9aa9b4; margin-top: 2px; }
.home-tip kbd { font-size: 11px; }
#fullscreen[hidden] { display: none; }
/* On touch screens the controls sit at the bottom, so messages show at the top. */
.app[data-input="touch"] .toast { top: 14px; bottom: auto; }
/* Phones held sideways are short: on touch screens the title bar goes, so the game gets the height.
   Its sound switch moves into the menus (title, pause, game over). */
.overlay-sound { display: none; }
@media (max-height: 520px) {
  .app[data-input="touch"] .header { display: none; }
  .app[data-input="touch"] { padding-top: 6px; }
  .app[data-input="touch"] .overlay-sound { display: block; margin: 12px auto 0; border: 0; background: transparent; color: #aebbc4; font-size: 12px; }
}
/* No long-press callout or text selection while playing. */
body { -webkit-touch-callout: none; }