@font-face {
  font-family: "League Spartan";
  src: url("fonts/LeagueSpartan-Bold.otf") format("opentype");
}

@font-face {
  font-family: "Sackers Gothic";
  src: url("fonts/Sackers-Gothic-Std-Light.ttf") format("truetype");
}

:root {
  --blue: #0d4ccc;
  --panel: rgba(240, 243, 249, 0.82);
  --overlay: rgba(80, 89, 102, 0.7);
  --text: #0d4ccc;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #c7d7f3;
  color: var(--text);
  font-family: "League Spartan", Arial, sans-serif;
}

body {
  display: grid;
  place-items: center;
  padding: 24px;
}

.app-shell {
  width: min(100%, 1320px);
}

.game-shell {
  display: grid;
  place-items: center;
}

.game {
  position: relative;
  width: min(100vw - 48px, 1170px);
  aspect-ratio: 1170 / 540;
  overflow: hidden;
  background: #dbe7ff;
  box-shadow: var(--shadow);
}

.layer,
.dynamic-layer img,
.dynamic-layer div {
  position: absolute;
  display: block;
  user-select: none;
  pointer-events: none;
  opacity: 0;
}

.stretch {
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
}

#homeBG,
#waterBG,
#bg,
#islandOutline,
#island,
#deck,
#heightBar,
#arrowHead,
#propeller,
#planeSprite,
#startImg,
#finishImg,
#youWinImg,
#bigPlane,
#flyingPlane {
  z-index: 5;
}

#howToBG {
  z-index: 26;
}

.tall-bg {
  left: 0;
  width: 100%;
  height: 300%;
  top: -100%;
  object-fit: fill;
  opacity: 0;
}

.island {
  width: 20%;
  height: 60%;
  left: 40%;
  top: -100%;
  object-fit: contain;
  opacity: 0;
}

.island.faded {
  opacity: 0;
}

.deck {
  width: 50%;
  height: 15%;
  left: 25%;
  top: 82.5%;
  object-fit: fill;
  opacity: 0;
}

.meter {
  width: 5%;
  height: 95%;
  left: 0;
  top: 2.5%;
  object-fit: fill;
  opacity: 0;
}

.arrow {
  width: 2.5%;
  height: 5.4%;
  left: 3.2%;
  top: 50%;
  object-fit: fill;
  opacity: 0;
}

.plane.part {
  width: 30%;
  height: 12%;
  object-fit: contain;
  opacity: 0;
  transform-origin: center;
}

.center-banner {
  width: 40%;
  height: 40%;
  left: 30%;
  top: 30%;
  object-fit: contain;
  opacity: 0;
}

.win-banner {
  width: 100%;
  height: 40%;
  left: 0;
  top: 30%;
  object-fit: fill;
  opacity: 0;
}

.big-plane {
  width: 90%;
  height: 90%;
  left: -25%;
  top: 5%;
  object-fit: contain;
  opacity: 0;
}

.menu-plane {
  width: 60%;
  height: 60%;
  left: 0;
  top: 0;
  object-fit: contain;
  opacity: 0;
}

.menu-copy,
.menu-buttons,
.hud-copy,
.overlay-panel,
#pauseBtn {
  position: absolute;
  z-index: 30;
}

.menu-buttons.visible,
.overlay-panel,
#pauseBtn.visible,
#howToBG.visible {
  pointer-events: auto;
}

.menu-copy {
  left: 6%;
  top: 3%;
  opacity: 0;
}

.menu-copy h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 4.2rem);
  line-height: 0.95;
}

.menu-copy .subtitle {
  margin: 0 0 14px;
  font-family: "Sackers Gothic", sans-serif;
  font-size: clamp(0.6rem, 1vw, 1rem);
}

.menu-buttons {
  right: 6%;
  top: 31%;
  width: 25%;
  display: grid;
  gap: 26px;
  opacity: 0;
}

.primary-btn {
  border: 0;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  font: inherit;
  font-size: clamp(1rem, 1.5vw, 1.6rem);
  padding: 16px 18px;
  cursor: pointer;
}

.primary-btn:disabled {
  cursor: default;
  opacity: 0.5;
}

.icon-btn {
  top: 0;
  right: 0;
  width: 8%;
  aspect-ratio: 1;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  opacity: 0;
}

.icon-btn img {
  width: 100%;
  height: 100%;
  object-fit: fill;
}

.hud-copy {
  inset: 0;
  opacity: 0;
  font-size: clamp(0.8rem, 1.5vw, 1.6rem);
  pointer-events: none;
}

.hud-copy p {
  position: absolute;
  margin: 0;
}

#distanceLabel {
  left: 12%;
  bottom: 3%;
}

#scoreLabel {
  right: 14%;
  bottom: 3%;
}

#altLabel {
  left: 8%;
  top: 3%;
}

.overlay-panel {
  left: 50%;
  top: 50%;
  width: min(62%, 720px);
  transform: translate(-50%, -50%);
  background: var(--panel);
  color: var(--text);
  padding: 28px 32px;
  border-radius: 8px;
  display: none;
  text-align: center;
  box-shadow: var(--shadow);
}

.overlay-panel h2 {
  margin: 0 0 22px;
  font-family: "Sackers Gothic", sans-serif;
  font-size: clamp(1.4rem, 2.3vw, 2.3rem);
}

.overlay-panel p {
  margin: 12px 0;
  font-size: clamp(1rem, 1.5vw, 1.4rem);
}

.summary-actions {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.dynamic-layer {
  position: absolute;
  inset: 0;
  z-index: 20;
}

.dimmed::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay);
  z-index: 25;
}

.visible {
  opacity: 1;
  visibility: visible;
}

.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

@media (max-width: 820px) {
  body {
    padding: 12px;
  }

  .game {
    width: min(100vw - 24px, 1170px);
  }

  .menu-buttons {
    width: 34%;
    gap: 16px;
  }

  .summary-actions {
    grid-template-columns: 1fr;
  }
}