/* ============================================================
   Snake Adventure — Stylesheet
   Theme: carved-stone jungle ruins, gold accents, deep canopy green
   ============================================================ */

:root {
  --jungle-950: #0e1f16;
  --jungle-900: #16301f;
  --jungle-800: #1f4029;
  --jungle-700: #2a5636;
  --stone-300: #d8d3c4;
  --stone-500: #9a9484;
  --gold-400: #ffdf7a;
  --gold: #f7c948;
  --gold-deep: #c9891a;
  --ember: #e8542f;
  --cream: #fbf3df;
  --shadow-deep: rgba(0,0,0,0.55);
  --font-display: 'Baloo 2', 'Luckiest Guy', 'Trebuchet MS', sans-serif;
  --font-body: 'Trebuchet MS', 'Segoe UI', sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

@font-face {
  font-family: 'Baloo 2';
  src: local('Arial');
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0;
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--jungle-950);
  font-family: var(--font-body);
  color: var(--cream);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#app {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(60,110,70,0.35), transparent 60%),
    linear-gradient(180deg, var(--jungle-900), var(--jungle-950) 70%);
}

canvas#gameCanvas, canvas#fxCanvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}
canvas#fxCanvas { pointer-events: none; }

#touchLayer {
  position: absolute;
  inset: 0;
  z-index: 5;
  touch-action: none;
  -ms-touch-action: none;
}

/* ---------------- HUD ---------------- */
.hud {
  position: absolute;
  top: calc(10px + var(--safe-top));
  left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 0 12px;
  z-index: 20;
  pointer-events: none;
}

.hud-panel {
  pointer-events: auto;
  display: flex;
  gap: 14px;
  background: linear-gradient(180deg, rgba(35,58,38,0.92), rgba(18,34,22,0.92));
  border: 2px solid rgba(255,214,120,0.35);
  border-radius: 16px;
  padding: 8px 16px;
  box-shadow: 0 6px 16px var(--shadow-deep), inset 0 1px 0 rgba(255,255,255,0.08);
  backdrop-filter: blur(2px);
}

.hud-stat { display: flex; flex-direction: column; align-items: center; min-width: 46px; }
.hud-label {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--gold);
  font-weight: 700;
  opacity: 0.85;
}
.hud-value {
  font-size: 18px;
  font-weight: 800;
  color: var(--cream);
  text-shadow: 0 2px 3px rgba(0,0,0,0.6);
  font-variant-numeric: tabular-nums;
}

.hud-buttons {
  pointer-events: auto;
  display: flex;
  gap: 8px;
}
.icon-btn {
  width: 44px; height: 44px;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  filter: drop-shadow(0 4px 6px var(--shadow-deep));
  transition: transform 0.12s ease;
}
.icon-btn img { width: 100%; height: 100%; object-fit: contain; }
.icon-btn:active { transform: scale(0.86); }

/* ---------------- Power-up bar ---------------- */
.powerup-bar {
  position: absolute;
  top: calc(72px + var(--safe-top));
  left: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 19;
  pointer-events: none;
}
.powerup-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(15,28,18,0.85);
  border: 1px solid rgba(255,214,120,0.4);
  border-radius: 20px;
  padding: 4px 10px 4px 4px;
  animation: chipIn 0.25s ease;
}
.powerup-chip img { width: 26px; height: 26px; }
.powerup-chip .chip-timer {
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
  min-width: 20px;
}
@keyframes chipIn { from { transform: translateX(-30px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ---------------- Screens (overlays) ---------------- */
.screen {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6,14,9,0.72);
  backdrop-filter: blur(4px);
  animation: fadeIn 0.25s ease;
  padding: 16px;
}
.screen.hidden { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.screen-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 420px;
  width: 100%;
  animation: popIn 0.32s cubic-bezier(.2,1.4,.4,1);
}
@keyframes popIn { from { transform: scale(0.85); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* Start screen */
.game-title {
  font-family: var(--font-display);
  font-size: 42px;
  text-align: center;
  color: var(--cream);
  text-shadow: 0 3px 0 var(--gold-deep), 0 8px 14px var(--shadow-deep);
  margin: 0 0 4px;
  letter-spacing: 0.02em;
}
.game-title span { color: var(--gold); }
.game-subtitle {
  color: var(--stone-300);
  font-size: 14px;
  margin: 0 0 22px;
  opacity: 0.9;
}

.difficulty-select { width: 100%; margin-bottom: 22px; text-align: center; }
.diff-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.diff-options { display: flex; gap: 8px; justify-content: center; }
.diff-btn {
  flex: 1;
  max-width: 110px;
  padding: 10px 4px;
  border-radius: 12px;
  border: 2px solid rgba(255,214,120,0.25);
  background: linear-gradient(180deg, #294a33, #1a3322);
  color: var(--stone-300);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.diff-btn.active {
  background: linear-gradient(180deg, var(--gold), var(--gold-deep));
  color: #3a2400;
  border-color: var(--gold);
  box-shadow: 0 4px 10px rgba(0,0,0,0.35);
}
.diff-options.small .diff-btn { padding: 8px 2px; font-size: 12px; }

.play-btn-large {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: none;
  cursor: pointer;
  background: linear-gradient(180deg, #58c15a, #2f8c3a);
  border-radius: 20px;
  padding: 16px 46px;
  box-shadow: 0 8px 0 #1d5a24, 0 14px 24px rgba(0,0,0,0.45);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}
.play-btn-large:active {
  transform: translateY(6px);
  box-shadow: 0 2px 0 #1d5a24, 0 6px 12px rgba(0,0,0,0.45);
}
.play-btn-large img { width: 30px; height: 30px; }
.play-btn-large span {
  font-family: var(--font-display);
  font-size: 22px;
  color: #fff;
  letter-spacing: 0.05em;
  text-shadow: 0 2px 2px rgba(0,0,0,0.35);
}

.start-stats {
  margin-top: 22px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--gold);
  font-size: 15px;
}
.mini-icon { width: 22px; height: 22px; vertical-align: middle; }
.start-stats .dot { color: var(--stone-500); margin: 0 4px; }

/* Pause / Settings panels */
.pause-panel, .settings-panel {
  background: linear-gradient(180deg, rgba(35,60,40,0.97), rgba(16,30,20,0.97));
  border: 3px solid rgba(255,214,120,0.4);
  border-radius: 22px;
  padding: 26px 24px;
  box-shadow: 0 16px 40px var(--shadow-deep);
  width: 100%;
}
.menu-title {
  font-family: var(--font-display);
  text-align: center;
  color: var(--gold);
  font-size: 26px;
  margin: 0 0 20px;
  text-shadow: 0 2px 0 rgba(0,0,0,0.4);
}
.menu-buttons { display: flex; flex-direction: column; gap: 12px; }
.menu-btn, .wood-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  border: none;
  cursor: pointer;
  background: linear-gradient(180deg, #3c6a45, #234631);
  border: 2px solid rgba(255,214,120,0.3);
  border-radius: 14px;
  padding: 12px 18px;
  color: var(--cream);
  font-size: 16px;
  font-weight: 700;
  transition: transform 0.1s ease;
}
.menu-btn img { width: 26px; height: 26px; }
.menu-btn:active, .wood-btn:active { transform: scale(0.96); }

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-weight: 700;
  color: var(--stone-300);
}
.toggle-btn {
  border: 2px solid var(--gold);
  background: linear-gradient(180deg, var(--gold), var(--gold-deep));
  color: #3a2400;
  padding: 6px 18px;
  border-radius: 20px;
  font-weight: 800;
  cursor: pointer;
}
.toggle-btn.off {
  background: linear-gradient(180deg, #555, #333);
  color: #ccc;
  border-color: #666;
}
.close-settings { justify-content: center; margin-top: 6px; }

/* Result panels (Game Over / Victory) */
.result-panel { align-items: center; width: 100%; max-width: 400px; }
.banner-image { width: 100%; max-width: 380px; display: block; margin-bottom: -18px; filter: drop-shadow(0 10px 20px var(--shadow-deep)); }

.result-stats {
  width: 88%;
  background: linear-gradient(180deg, rgba(20,32,22,0.95), rgba(10,18,12,0.95));
  border: 2px solid rgba(255,214,120,0.3);
  border-radius: 16px;
  padding: 14px 20px;
  margin-bottom: 16px;
}
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.12);
  font-size: 14px;
  color: var(--stone-300);
  font-weight: 700;
}
.result-row:last-child { border-bottom: none; }
.result-value {
  color: var(--cream);
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.result-value.gold { color: var(--gold); }

.result-buttons { display: flex; gap: 10px; width: 88%; }
.wood-btn {
  flex: 1;
  flex-direction: column;
  gap: 4px;
  padding: 12px 6px;
  font-size: 12px;
  justify-content: center;
  background: linear-gradient(180deg, #8a5a2e, #5c3a1c);
  border-color: rgba(255,214,120,0.4);
}
.wood-btn img { width: 24px; height: 24px; }
.wood-btn.primary {
  background: linear-gradient(180deg, #58c15a, #2f8c3a);
}

/* Screen shake target */
.shake { animation: shakeAnim 0.28s ease; }
@keyframes shakeAnim {
  0% { transform: translate(0,0); }
  20% { transform: translate(-8px,4px); }
  40% { transform: translate(7px,-5px); }
  60% { transform: translate(-5px,-3px); }
  80% { transform: translate(4px,3px); }
  100% { transform: translate(0,0); }
}

/* ---------------- Loading screen ---------------- */
.loading-screen {
  position: absolute;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: linear-gradient(180deg, var(--jungle-900), var(--jungle-950));
  transition: opacity 0.4s ease;
}
.loading-screen.hidden { opacity: 0; pointer-events: none; }
.loading-icon {
  width: 64px; height: 64px;
  animation: loadingSpin 1.4s linear infinite;
  filter: drop-shadow(0 6px 10px var(--shadow-deep));
}
@keyframes loadingSpin {
  0%, 100% { transform: rotate(-8deg) scale(1); }
  50% { transform: rotate(8deg) scale(1.08); }
}
.loading-bar-track {
  width: 200px; height: 10px;
  background: rgba(255,255,255,0.12);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(255,214,120,0.3);
}
.loading-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold));
  transition: width 0.2s ease;
}
.loading-text {
  font-size: 13px;
  color: var(--stone-300);
  letter-spacing: 0.04em;
}

/* Responsive tweaks */
@media (max-width: 380px) {
  .game-title { font-size: 32px; }
  .hud-value { font-size: 15px; }
  .hud-panel { gap: 10px; padding: 6px 10px; }
}

@media (orientation: landscape) and (max-height: 480px) {
  .screen-inner { max-width: 340px; transform: scale(0.85); }
  .hud { top: 6px; }
}