:root {
  --sky-top: #1a3a5c;
  --sky-mid: #4a7fa8;
  --sky-low: #b8d4e8;
  --ground: #2d5a3d;
  --accent: #e8a04a;
  --ink: #0f1c28;
  --glass: rgba(15, 28, 40, 0.55);
  --panel: rgba(12, 22, 34, 0.78);
  --cream: #eef4f8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a1520;
  font-family: "DM Sans", system-ui, sans-serif;
  color: var(--cream);
}

#app {
  position: relative;
  width: 100%;
  height: 100%;
}

#game-root {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#game-root canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.hidden {
  display: none !important;
}

#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  z-index: 3;
}

.brand {
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.12em;
  font-size: 1.35rem;
  color: rgba(238, 244, 248, 0.9);
  margin-bottom: 0.75rem;
  text-shadow: 0 0 18px rgba(232, 160, 74, 0.25);
}

.stat {
  display: flex;
  gap: 0.65rem;
  align-items: baseline;
  margin-bottom: 0.25rem;
  padding: 0.1rem 0.35rem 0.1rem 0;
  border-left: 2px solid transparent;
}

.stat:hover {
  border-left-color: rgba(232, 160, 74, 0.35);
}

.stat span {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  opacity: 0.65;
}

.stat strong {
  font-family: "Bebas Neue", sans-serif;
  font-size: 1.75rem;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.hud-right {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-width: 140px;
}

.gauge {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0.45rem;
  align-items: center;
}

.gauge span {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  opacity: 0.7;
}

.bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  overflow: hidden;
}

.bar i {
  display: block;
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, #6eb8d8, var(--accent));
  border-radius: inherit;
  transition: width 0.08s linear;
}

.panel {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(440px, calc(100vw - 2rem));
  padding: 2rem 1.75rem 1.75rem;
  background:
    linear-gradient(165deg, rgba(36, 52, 70, 0.5) 0%, transparent 45%),
    var(--panel);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(238, 244, 248, 0.14);
  border-top-color: rgba(232, 160, 74, 0.4);
  border-radius: 4px;
  text-align: center;
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  animation: rise 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translate(-50%, calc(-50% + 18px));
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

h1 {
  font-family: "Bebas Neue", sans-serif;
  font-size: clamp(3rem, 10vw, 4.4rem);
  letter-spacing: 0.08em;
  line-height: 0.95;
  margin-bottom: 0.65rem;
}

h2 {
  font-family: "Bebas Neue", sans-serif;
  font-size: 2.4rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.tagline {
  opacity: 0.78;
  font-size: 0.95rem;
  line-height: 1.45;
  margin-bottom: 1.35rem;
}

#overlay-msg {
  opacity: 0.8;
  margin-bottom: 1.35rem;
}

.plane-picker {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.plane-card {
  appearance: none;
  border: 1px solid rgba(238, 244, 248, 0.14);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 55%),
    rgba(255, 255, 248, 0.03);
  color: inherit;
  border-radius: 4px;
  padding: 0.75rem 0.4rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.plane-card:hover {
  transform: translateY(-2px);
  border-color: rgba(232, 160, 74, 0.45);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);
}

.plane-card.selected {
  border-color: var(--accent);
  background:
    linear-gradient(180deg, rgba(232, 160, 74, 0.18), rgba(232, 160, 74, 0.06));
  box-shadow: 0 0 0 1px rgba(232, 160, 74, 0.25), 0 8px 20px rgba(0, 0, 0, 0.28);
}

.plane-card canvas {
  width: 100%;
  height: 48px;
  display: block;
  margin-bottom: 0.35rem;
}

.plane-card .name {
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.08em;
  font-size: 1rem;
}

.plane-card .meta {
  font-size: 0.65rem;
  opacity: 0.6;
  margin-top: 0.15rem;
}

.airframe-label {
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.1em;
  font-size: 1.15rem;
  color: var(--accent);
  margin: -0.35rem 0 0.9rem;
  text-shadow: 0 0 16px rgba(232, 160, 74, 0.3);
}

.hangar {
  text-align: left;
  margin-bottom: 1.1rem;
  padding: 0.85rem 0.9rem;
  background:
    linear-gradient(135deg, rgba(232, 160, 74, 0.06), transparent 40%),
    rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(238, 244, 248, 0.12);
  border-left: 3px solid rgba(232, 160, 74, 0.45);
  border-radius: 4px;
}

.hangar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.65rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  opacity: 0.8;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid rgba(238, 244, 248, 0.08);
}

.hangar-head strong {
  font-family: "Bebas Neue", sans-serif;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  opacity: 1;
}

.hangar-head em {
  font-style: normal;
}

.upgrade-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.upgrade-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.82rem;
  padding: 0.35rem 0.4rem;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.12);
  border: 1px solid rgba(238, 244, 248, 0.05);
}

.upgrade-row .meta {
  opacity: 0.55;
  font-size: 0.72rem;
}

.upgrade-row button {
  appearance: none;
  border: 1px solid rgba(232, 160, 74, 0.45);
  background: rgba(232, 160, 74, 0.12);
  color: var(--cream);
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.65rem;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.upgrade-row button:hover:not(:disabled) {
  background: rgba(232, 160, 74, 0.28);
}

.upgrade-row button:disabled {
  opacity: 0.35;
  cursor: default;
  border-color: rgba(238, 244, 248, 0.15);
  background: transparent;
}

.setting {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  text-align: left;
  margin-bottom: 1.1rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  opacity: 0.9;
}

.setting span {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.setting strong {
  font-family: "Bebas Neue", sans-serif;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  opacity: 1;
}

.setting input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  outline: none;
  cursor: pointer;
}

.setting input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

.setting input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

.hud-setting {
  margin-top: 0.65rem;
  margin-bottom: 0;
  pointer-events: auto;
  min-width: 140px;
  opacity: 0.85;
}

.hud-setting span {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
}

.hp-gauge {
  margin-top: 0.65rem;
  min-width: 140px;
}

.hp-gauge .bar i {
  background: linear-gradient(90deg, #c44b4b, #e8a04a);
}

.grok-banner {
  position: absolute;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.14em;
  font-size: 1.1rem;
  padding: 0.45rem 0.9rem;
  color: #f0d878;
  background: rgba(12, 22, 34, 0.72);
  border: 1px solid rgba(240, 216, 120, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.grok-banner.show {
  opacity: 1;
}

.view-btn {
  position: absolute;
  right: 1.5rem;
  bottom: 1.5rem;
  pointer-events: auto;
  appearance: none;
  border: 1px solid rgba(238, 244, 248, 0.22);
  background: rgba(12, 22, 34, 0.72);
  color: var(--cream);
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.12em;
  font-size: 1rem;
  padding: 0.55rem 0.85rem;
  cursor: pointer;
  border-radius: 3px;
}

.view-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.cockpit {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.cockpit-frame {
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 90px 32px rgba(8, 14, 22, 0.88);
  background:
    linear-gradient(90deg, rgba(10, 16, 24, 0.62) 0%, transparent 11%, transparent 89%, rgba(10, 16, 24, 0.62) 100%),
    linear-gradient(0deg, transparent 0%, transparent 76%, rgba(10, 16, 24, 0.4) 100%);
}

.cockpit-canopy {
  position: absolute;
  inset: 8% 18% 28%;
  border: 1px solid rgba(180, 210, 230, 0.08);
  border-radius: 42% 42% 8% 8% / 28% 28% 4% 4%;
  box-shadow:
    inset 0 0 40px rgba(140, 190, 220, 0.06),
    inset 0 -20px 50px rgba(8, 14, 22, 0.25);
  background: linear-gradient(
    165deg,
    rgba(180, 210, 235, 0.07) 0%,
    transparent 40%,
    transparent 70%,
    rgba(232, 160, 74, 0.04) 100%
  );
}

.cockpit-pillar {
  position: absolute;
  top: 0;
  bottom: 16%;
  width: 3.2%;
  background: linear-gradient(
    180deg,
    rgba(18, 24, 32, 0.95),
    rgba(28, 34, 42, 0.85) 40%,
    rgba(14, 18, 24, 0.98)
  );
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.45);
}

.cockpit-pillar-l {
  left: 14%;
  transform: skewX(-6deg);
  border-right: 1px solid rgba(232, 160, 74, 0.12);
}

.cockpit-pillar-r {
  right: 14%;
  transform: skewX(6deg);
  border-left: 1px solid rgba(232, 160, 74, 0.12);
}

.cockpit-dash {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 20%;
  background:
    linear-gradient(180deg, transparent, rgba(12, 18, 26, 0.55) 18%, rgba(10, 14, 20, 0.95) 42%),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 6px,
      rgba(255, 255, 255, 0.015) 6px,
      rgba(255, 255, 255, 0.015) 7px
    );
  border-top: 1px solid rgba(232, 160, 74, 0.18);
  box-shadow: inset 0 12px 28px rgba(0, 0, 0, 0.35);
}

.cockpit-dial {
  position: absolute;
  bottom: 22%;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid rgba(232, 160, 74, 0.35);
  background:
    radial-gradient(circle at 40% 35%, rgba(60, 70, 80, 0.9), rgba(16, 20, 28, 0.95)),
    conic-gradient(from 210deg, rgba(232, 160, 74, 0.55) 0 40%, transparent 40% 100%);
  box-shadow:
    inset 0 0 8px rgba(0, 0, 0, 0.6),
    0 0 10px rgba(232, 160, 74, 0.12);
}

.cockpit-dial::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 38%;
  background: rgba(232, 160, 74, 0.85);
  transform-origin: bottom center;
  transform: translate(-50%, -100%) rotate(-25deg);
  border-radius: 1px;
  box-shadow: 0 0 6px rgba(232, 160, 74, 0.5);
}

.cockpit-dial-l { left: 22%; }
.cockpit-dial-c { left: 50%; transform: translateX(-50%); width: 60px; height: 60px; }
.cockpit-dial-r { right: 22%; }

.cockpit-gunsight {
  position: absolute;
  left: 50%;
  top: 46%;
  width: 36px;
  height: 36px;
  transform: translate(-50%, -50%);
}

.cockpit-gunsight .sight-ring {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(232, 160, 74, 0.55);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(232, 160, 74, 0.2);
}

.cockpit-gunsight .sight-ring::before {
  content: "";
  position: absolute;
  inset: -10px;
  border: 1px solid rgba(232, 160, 74, 0.22);
  border-radius: 50%;
}

.cockpit-gunsight .sight-pip {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 4px;
  height: 4px;
  margin: -2px 0 0 -2px;
  border-radius: 50%;
  background: rgba(255, 220, 140, 0.95);
  box-shadow: 0 0 6px rgba(232, 160, 74, 0.8);
}

.cockpit-gunsight::before,
.cockpit-gunsight::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: rgba(232, 160, 74, 0.65);
  transform: translate(-50%, -50%);
}

.cockpit-gunsight::before {
  width: 1px;
  height: 52px;
}

.cockpit-gunsight::after {
  width: 52px;
  height: 1px;
}

.btn {
  appearance: none;
  border: none;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 0.85rem 1.4rem;
  border-radius: 3px;
  cursor: pointer;
  width: 100%;
  transition: transform 0.15s, filter 0.15s;
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.btn:active {
  transform: translateY(0);
}

.btn.primary {
  background: var(--accent);
  color: var(--ink);
  margin-bottom: 0.55rem;
}

.btn.ghost {
  background: transparent;
  color: var(--cream);
  border: 1px solid rgba(238, 244, 248, 0.25);
}

.controls-hint {
  margin-top: 0.85rem;
  font-size: 0.72rem;
  opacity: 0.55;
  line-height: 1.5;
}

kbd {
  display: inline-block;
  padding: 0.05rem 0.35rem;
  border: 1px solid rgba(238, 244, 248, 0.25);
  border-radius: 3px;
  font-family: inherit;
  font-size: 0.68rem;
}

@media (max-width: 520px) {
  #hud {
    padding: 0.85rem;
  }

  .hud-right {
    min-width: 110px;
  }

  .plane-picker {
    gap: 0.45rem;
  }
}