:root {
  color-scheme: dark;
  --ink: #07131c;
  --panel: rgba(7, 19, 28, 0.92);
  --panel-soft: rgba(13, 30, 40, 0.82);
  --line: rgba(167, 218, 238, 0.34);
  --text: #f4f8fa;
  --muted: #abc0ca;
  --sky: #7ed8ff;
  --accent: #e2874f;
  --warning: #ff9b72;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--ink);
  color: var(--text);
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
}

body {
  touch-action: none;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
}

button {
  font: inherit;
}

.hidden {
  display: none !important;
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
  background: linear-gradient(#6fa6bb, #d3d0b9 62%, #53664a);
}

.start-panel {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: max(22px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(22px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  background:
    radial-gradient(circle at 72% 20%, rgba(126, 216, 255, 0.17), transparent 34%),
    linear-gradient(165deg, rgba(6, 15, 22, 0.84), rgba(4, 12, 18, 0.97)),
    linear-gradient(#294c61, #101c24);
}

.start-panel::before,
.start-panel::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.start-panel::before {
  width: min(88vw, 1000px);
  height: min(44vw, 460px);
  left: -12vw;
  bottom: -17vw;
  border-radius: 50% 50% 0 0;
  background: #243943;
  transform: rotate(8deg);
  opacity: 0.85;
}

.start-panel::after {
  width: min(64vw, 720px);
  height: min(38vw, 390px);
  right: -12vw;
  bottom: -16vw;
  border-radius: 55% 55% 0 0;
  background: #172932;
  transform: rotate(-9deg);
}

.start-panel__card {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  padding: clamp(25px, 5vw, 42px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(8, 22, 31, 0.95), rgba(8, 18, 26, 0.85));
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.38);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 9px;
  color: var(--sky);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.start-panel h1 {
  margin: 0;
  font-size: clamp(48px, 12vw, 84px);
  line-height: 0.92;
  letter-spacing: -0.07em;
  font-weight: 900;
}

.start-panel h1 span {
  color: var(--accent);
}

.start-panel__lead {
  max-width: 430px;
  margin: 18px 0 25px;
  color: var(--muted);
  font-size: clamp(16px, 4vw, 19px);
  line-height: 1.5;
}

.start-panel__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.button {
  min-height: 74px;
  padding: 13px 16px;
  border-radius: 13px;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: left;
  transition: transform 130ms ease, background 130ms ease, border-color 130ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(1px);
}

.button:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: 3px;
}

.button:disabled {
  cursor: progress;
  opacity: 0.5;
  transform: none;
}

.button span,
.button small {
  display: block;
}

.button span {
  font-size: 15px;
  font-weight: 850;
  letter-spacing: 0.035em;
}

.button small {
  margin-top: 5px;
  font-size: 11px;
  opacity: 0.76;
}

.button--primary {
  color: #07131c;
  background: var(--sky);
}

.button--secondary {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.045);
}

.start-panel__status {
  min-height: 22px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.start-panel__status.error {
  color: var(--warning);
}

.start-panel__details {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(167, 218, 238, 0.17);
  color: #91a8b3;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.system-card {
  position: fixed;
  z-index: 90;
  left: 50%;
  top: 50%;
  width: min(420px, calc(100% - 38px));
  transform: translate(-50%, -50%);
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--panel);
  text-align: center;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.46);
}

.system-card strong,
.system-card span {
  display: block;
}

.system-card strong {
  font-size: 20px;
  letter-spacing: 0.08em;
}

.system-card span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.install-hint {
  position: fixed;
  z-index: 80;
  left: max(12px, env(safe-area-inset-left));
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  max-width: 520px;
  margin: 0 auto;
  padding: 13px 14px 13px 17px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.34);
}

.install-hint strong,
.install-hint span {
  display: block;
}

.install-hint strong {
  font-size: 13px;
}

.install-hint span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.install-hint button {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border: 0;
  border-radius: 50%;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  font-size: 25px;
  cursor: pointer;
}

.eye-message {
  position: fixed;
  inset: 0;
  z-index: 30;
  pointer-events: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.eye-left,
.eye-right {
  display: grid;
  place-items: center;
  padding: 20px;
  color: #fff;
  font-size: clamp(18px, 4vw, 34px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.07em;
  white-space: pre-line;
  text-align: center;
  text-shadow: 0 2px 15px #000, 0 0 35px rgba(0, 0, 0, 0.8);
}

.mono-hud {
  position: fixed;
  z-index: 20;
  left: max(15px, env(safe-area-inset-left));
  top: max(15px, env(safe-area-inset-top));
  pointer-events: none;
}

.flight-hud {
  width: min(390px, calc(100vw - 30px));
  padding: 14px 15px 12px;
  border: 1px solid rgba(142, 219, 249, 0.3);
  border-radius: 14px;
  color: #eefaff;
  background: linear-gradient(135deg, rgba(3, 16, 24, 0.78), rgba(5, 21, 29, 0.48));
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(9px);
  font-variant-numeric: tabular-nums;
}

.flight-hud__primary {
  display: flex;
  gap: 24px;
}

.flight-hud__readout {
  display: grid;
  grid-template-columns: auto auto;
  align-items: end;
  column-gap: 7px;
}

.flight-hud__readout strong {
  grid-column: 1;
  font-size: 31px;
  line-height: 0.92;
  letter-spacing: -0.05em;
}

.flight-hud__label,
.flight-hud__unit {
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.flight-hud__label {
  grid-column: 1 / -1;
  margin-bottom: 4px;
  color: var(--sky);
}

.flight-hud__unit {
  grid-column: 2;
  padding-bottom: 2px;
  color: var(--muted);
}

.flight-hud__secondary,
.flight-hud__status {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 5px 14px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.flight-hud__secondary {
  margin-top: 11px;
  color: #a9c0ca;
}

.flight-hud__secondary b {
  color: #f5fbfd;
}

.flight-hud__status {
  margin-top: 10px;
  color: #d5e5eb;
}

.flight-hud__status [data-warning="true"] {
  color: var(--warning);
}

.flight-hud__meter {
  height: 3px;
  margin-top: 7px;
  overflow: hidden;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.10);
}

.flight-hud__meter i {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0.01);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--sky), var(--accent));
}

.flight-hud__debug {
  margin-top: 7px;
  color: rgba(195, 216, 225, 0.55);
  font-size: 8px;
  letter-spacing: 0.05em;
}

body.running .start-panel {
  display: none;
}

@media (max-width: 620px) {
  .start-panel__actions {
    grid-template-columns: 1fr;
  }

  .start-panel__card {
    border-radius: 17px;
  }

  .start-panel__details {
    display: none;
  }

  .flight-hud {
    width: 310px;
  }

  .flight-hud__debug {
    display: none;
  }
}

@media (orientation: landscape) and (max-height: 520px) {
  .start-panel {
    place-items: center;
    padding: 12px max(18px, env(safe-area-inset-right)) 12px max(18px, env(safe-area-inset-left));
  }

  .start-panel__card {
    width: min(760px, 94vw);
    padding: 18px 22px;
  }

  .start-panel h1 {
    font-size: 52px;
  }

  .start-panel__lead {
    margin: 9px 0 14px;
    font-size: 14px;
  }

  .start-panel__actions {
    grid-template-columns: 1fr 1fr;
  }

  .button {
    min-height: 60px;
  }

  .start-panel__details {
    display: none;
  }

  .start-panel__status {
    margin-top: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}


/* Desktop displays one centred system message.
   Phone stereo keeps one message for each eye. */
.eye-message.mono {
  grid-template-columns: 1fr;
}

.eye-message.mono .eye-right {
  display: none;
}

/* SKYLINE COMBAT SANDBOX V4 — analog IL-2-inspired instrument language */
:root {
  --analog-ink: #171812;
  --analog-face: #292a21;
  --analog-face-light: #3a3b2e;
  --analog-brass: #b6a36b;
  --analog-paper: #e4d9b5;
  --analog-red: #a83c34;
  --analog-glow: #e8cf7c;
}

.start-panel__card {
  border: 3px solid var(--analog-brass) !important;
  border-radius: 3px !important;
  background:
    linear-gradient(rgba(255,255,255,.025), rgba(0,0,0,.11)),
    repeating-linear-gradient(90deg, rgba(255,255,255,.018) 0 1px, transparent 1px 6px),
    var(--analog-face) !important;
  box-shadow: 0 20px 70px rgba(0,0,0,.46), inset 0 0 0 5px var(--analog-ink), inset 0 0 0 7px rgba(182,163,107,.4) !important;
  color: var(--analog-paper) !important;
}

.start-panel h1,
.start-panel__lead,
.start-panel__details,
.eyebrow,
.button {
  font-family: ui-monospace, "Cascadia Mono", "Courier New", monospace !important;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.start-panel h1 span,
.eyebrow { color: var(--analog-glow) !important; }

.button {
  border-radius: 2px !important;
  border: 2px solid var(--analog-brass) !important;
  background: #333429 !important;
  color: var(--analog-paper) !important;
  box-shadow: inset 0 0 0 3px #171812, 0 5px 0 #171812 !important;
}

.button--primary {
  background: #6f302b !important;
  border-color: #d09278 !important;
}

.button:active { transform: translateY(3px); box-shadow: inset 0 0 0 3px #171812, 0 2px 0 #171812 !important; }

.analog-hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  font-family: ui-monospace, "Cascadia Mono", "Courier New", monospace;
  color: var(--analog-paper);
}

.analog-hud__plate {
  position: absolute;
  left: max(14px, env(safe-area-inset-left));
  top: max(14px, env(safe-area-inset-top));
  width: min(470px, calc(100vw - 28px));
  padding: 14px 17px 12px;
  border: 3px solid var(--analog-brass);
  border-radius: 3px;
  background:
    linear-gradient(150deg, rgba(255,255,255,.04), transparent 35%),
    repeating-linear-gradient(0deg, rgba(255,255,255,.012) 0 1px, transparent 1px 4px),
    rgba(38,39,31,.94);
  box-shadow: inset 0 0 0 4px #14150f, 0 10px 32px rgba(0,0,0,.34);
}

.analog-hud__screws i {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--analog-brass);
  box-shadow: inset 0 0 0 2px #2a291f;
}
.analog-hud__screws i:nth-child(1) { left: 7px; top: 7px; }
.analog-hud__screws i:nth-child(2) { right: 7px; top: 7px; }
.analog-hud__screws i:nth-child(3) { left: 7px; bottom: 7px; }
.analog-hud__screws i:nth-child(4) { right: 7px; bottom: 7px; }

.analog-hud__header,
.analog-hud__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 11px;
  letter-spacing: .08em;
}

.analog-hud__header {
  padding: 0 8px 9px;
  border-bottom: 1px solid rgba(182,163,107,.55);
}

.analog-hud__header b { color: var(--analog-glow); }
.analog-hud__header b[data-warning="true"] { color: #ff8a72; }

.analog-hud__gauges {
  display: grid;
  grid-template-columns: 1.15fr 1.15fr .8fr .8fr;
  gap: 8px;
  margin: 10px 0;
}

.analog-gauge {
  min-height: 71px;
  display: grid;
  place-items: center;
  align-content: center;
  border: 2px solid #12130e;
  border-radius: 50%;
  background: radial-gradient(circle at 45% 40%, #38382c, #171811 70%);
  box-shadow: inset 0 0 0 3px #777054, inset 0 0 18px #090a07;
}

.analog-gauge small,
.analog-gauge em { font-size: 8px; color: #b8ae8d; font-style: normal; }
.analog-gauge strong { font-size: 20px; line-height: 1; color: #f0e3b7; text-shadow: 0 0 8px rgba(232,207,124,.2); }
.analog-gauge--small strong { font-size: 16px; }

.analog-hud__footer {
  border-top: 1px solid rgba(182,163,107,.55);
  padding: 8px 7px 0;
  color: #aaa180;
}
.analog-hud__footer b { color: #e6d8ad; }
.analog-hud__footer [data-hud="boost"] { color: #ffcf70; font-weight: 900; }

.eye-message.mono { grid-template-columns: 1fr !important; }
.eye-message.mono .eye-right { display: none !important; }

@media (max-width: 720px) {
  .analog-hud__plate { width: min(390px, calc(100vw - 24px)); transform: scale(.88); transform-origin: top left; }
}


/* SKYLINE V4.1 — unmistakable analog operations board */
#start-panel.start-panel {
  background:
    linear-gradient(rgba(20, 21, 16, .94), rgba(10, 11, 8, .98)),
    repeating-linear-gradient(0deg, rgba(255,255,255,.018) 0 1px, transparent 1px 5px) !important;
}
#start-panel.start-panel::before,
#start-panel.start-panel::after { display: none !important; }
#start-panel .start-panel__card {
  width: min(680px, 100%) !important;
  border: 4px solid #b7a46d !important;
  border-radius: 2px !important;
  padding: clamp(28px, 5vw, 48px) !important;
  background:
    linear-gradient(145deg, rgba(255,255,255,.035), transparent 40%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.016) 0 1px, transparent 1px 7px),
    #303126 !important;
  box-shadow:
    inset 0 0 0 5px #15160f,
    inset 0 0 0 8px rgba(183,164,109,.44),
    0 30px 90px rgba(0,0,0,.58) !important;
  backdrop-filter: none !important;
}
#start-panel .eyebrow,
#start-panel h1,
#start-panel .start-panel__lead,
#start-panel .start-panel__details,
#start-panel .start-panel__status,
#start-panel .button {
  font-family: ui-monospace, "Cascadia Mono", "Courier New", monospace !important;
  text-transform: uppercase;
}
#start-panel .eyebrow { color: #e4ca79 !important; letter-spacing: .18em !important; }
#start-panel h1 { color: #eee3bc !important; letter-spacing: -.055em !important; text-shadow: 3px 3px 0 #15160f; }
#start-panel h1 span { color: #b74b3e !important; }
#start-panel .start-panel__lead,
#start-panel .start-panel__status,
#start-panel .start-panel__details { color: #c5bb96 !important; }
#start-panel .start-panel__details { border-color: rgba(183,164,109,.55) !important; }
#start-panel .button {
  border: 3px solid #b7a46d !important;
  border-radius: 1px !important;
  color: #eee3bc !important;
  background: #3a3a2d !important;
  box-shadow: inset 0 0 0 3px #15160f, 0 6px 0 #15160f !important;
}
#start-panel .button--primary { background: #75352f !important; border-color: #d28b72 !important; }
#start-panel .button:hover { filter: brightness(1.12); }


/* SKYLINE V4.2 MENU CURSOR */
body.menu-open #game {
  cursor: crosshair !important;
}


/* SKYLINE_V5_ANALOG_UI
   Solid, utilitarian flight-command styling. No glassmorphism. */
:root {
  --skyline-ink: #11120d;
  --skyline-olive: #292b20;
  --skyline-olive-light: #3b3d2d;
  --skyline-paper: #ded6b6;
  --skyline-brass: #b9a263;
  --skyline-red: #9f3b31;
  --skyline-line: rgba(222, 214, 182, 0.34);
}

.start-panel {
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,.018) 0 1px, transparent 1px 4px),
    radial-gradient(circle at 50% 20%, #454a3a 0, #272b22 45%, #11130f 100%);
}

.start-panel::before,
.start-panel::after {
  display: none !important;
}

.start-panel__card {
  width: min(680px, 100%);
  padding: clamp(24px, 4.5vw, 46px);
  border: 2px solid var(--skyline-brass);
  border-radius: 2px;
  background:
    linear-gradient(rgba(255,255,255,.025), rgba(0,0,0,.08)),
    var(--skyline-olive);
  box-shadow:
    0 0 0 5px #15170f,
    0 0 0 7px rgba(185,162,99,.45),
    inset 0 0 0 1px rgba(255,255,255,.06),
    inset 0 -26px 60px rgba(0,0,0,.28),
    0 28px 80px rgba(0,0,0,.52);
  backdrop-filter: none;
}

.start-panel__card::before,
.start-panel__card::after {
  content: "";
  position: absolute;
  width: 9px;
  height: 9px;
  border: 2px solid #0d0e0a;
  border-radius: 50%;
  background: var(--skyline-brass);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.28);
}

.start-panel__card::before { left: 12px; top: 12px; }
.start-panel__card::after { right: 12px; bottom: 12px; }

.eyebrow,
.start-panel__details,
.start-panel__status,
.mono-hud,
.eye-message {
  font-family: "Courier New", ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: .11em;
}

.eyebrow {
  color: var(--skyline-brass);
  font-size: 11px;
}

.start-panel h1 {
  color: var(--skyline-paper);
  font-family: Impact, "Arial Narrow", sans-serif;
  font-weight: 800;
  letter-spacing: .035em;
  text-shadow: 2px 3px 0 #11120d;
}

.start-panel h1 span {
  color: var(--skyline-red);
}

.start-panel__lead {
  color: #cbc4a7;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.45;
}

.start-panel__actions {
  gap: 15px;
}

.button {
  min-height: 78px;
  border: 1px solid #0b0c08;
  border-radius: 1px;
  box-shadow:
    inset 0 0 0 2px rgba(222,214,182,.14),
    0 4px 0 #0d0e0a;
  font-family: "Courier New", ui-monospace, monospace;
  text-transform: uppercase;
}

.button:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.button:active {
  transform: translateY(3px);
  box-shadow: inset 0 0 0 2px rgba(222,214,182,.14), 0 1px 0 #0d0e0a;
}

.button--primary {
  color: #14150f;
  background: var(--skyline-brass);
}

.button--secondary {
  color: var(--skyline-paper);
  border-color: var(--skyline-brass);
  background: var(--skyline-olive-light);
}

.start-panel__details {
  border-top-color: var(--skyline-line);
  color: #a9a282;
}

.start-panel__status {
  color: #bcb493;
}

.mono-hud {
  color: #e2d9b8;
  text-shadow: 0 1px 2px #000;
}

body.menu-open #game {
  cursor: crosshair;
}