/* ── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Tokens ─────────────────────────────────────────────────────── */
:root {
  --clr-bg:        #63C2FF;
  --clr-bg-end:    #A0E4FF;
  --clr-primary:   #FF4081;
  --clr-secondary: #2196F3;
  --clr-accent:    #FFD700;
  --clr-green:     #4caf50;
  --clr-text:      #ffffff;
  --clr-text-dim:  rgba(255,255,255,0.65);
  --clr-overlay:   rgba(15,65,155,0.82);
  --clr-border:    rgba(255,255,255,0.15);
  --radius-btn:    12px;
  --radius-card:   18px;
  --btn-h:         56px;
  --btn-w-min:     220px;
  --icon-btn-sz:   52px;
  --safe-t: env(safe-area-inset-top,    0px);
  --safe-r: env(safe-area-inset-right,  0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left,   0px);
}

/* ── Base ───────────────────────────────────────────────────────── */
html, body {
  width: 100%; height: 100%; overflow: hidden;
  background: var(--clr-bg);
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: var(--clr-text);
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
}

#app {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(to bottom, var(--clr-bg), var(--clr-bg-end));
}

/* ── Canvas ─────────────────────────────────────────────────────── */
#game-canvas {
  display: block; position: absolute;
  touch-action: none; user-select: none; -webkit-user-select: none;
  image-rendering: pixelated; image-rendering: crisp-edges;
  background: var(--clr-bg);
}

/* ── Screens ────────────────────────────────────────────────────── */
.screen { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center; z-index: 10; }
.screen--hidden { display: none; }
.screen--active { display: flex; }
.screen--overlay { background: transparent; pointer-events: none; }
.screen--overlay > * { pointer-events: auto; }

/* ── Screen inner (card) ────────────────────────────────────────── */
.screen__inner {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  padding: 32px 28px;
  padding-top: calc(32px + var(--safe-t));
  padding-bottom: calc(32px + var(--safe-b));
  background: var(--clr-overlay); border-radius: var(--radius-card);
  border: 1px solid var(--clr-border); min-width: 280px; max-width: 380px; width: 90vw;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.screen__inner--loading { background: transparent; border: none; backdrop-filter: none; -webkit-backdrop-filter: none; }
.screen__inner--shop { max-height: 90svh; overflow-y: auto; overscroll-behavior: contain; }

/* ── Loading ────────────────────────────────────────────────────── */
#loading-screen { background: var(--clr-bg); z-index: 100; }

/* ── Logo ───────────────────────────────────────────────────────── */
.logo__sub   { font-size: 13px; font-weight: 600; letter-spacing: 8px; color: var(--clr-accent); text-transform: uppercase; }
.logo__title { font-size: 42px; font-weight: 900; letter-spacing: 3px; line-height: 1.1; color: var(--clr-text); text-shadow: 0 0 24px rgba(255,64,129,0.65); text-align: center; }

/* ── Progress bar ───────────────────────────────────────────────── */
.progress-bar { width: 240px; height: 6px; background: rgba(255,255,255,0.12); border-radius: 3px; overflow: hidden; margin-top: 8px; }
.progress-bar__fill { height: 100%; width: 0%; background: var(--clr-primary); border-radius: 3px; transition: width 0.25s ease; }

/* ── Screen title ───────────────────────────────────────────────── */
.screen__title { font-size: 26px; font-weight: 800; letter-spacing: 3px; text-align: center; }

/* ── Record block ───────────────────────────────────────────────── */
.record-block { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.record-block__label { font-size: 11px; font-weight: 600; letter-spacing: 3px; color: var(--clr-text-dim); text-transform: uppercase; }
.record-block__value { font-size: 34px; font-weight: 800; color: var(--clr-accent); }

/* ── Buttons ────────────────────────────────────────────────────── */
.btn {
  display: flex; align-items: center; justify-content: center;
  min-height: var(--btn-h); min-width: var(--btn-w-min); width: 100%;
  padding: 0 20px; border: none; border-radius: var(--radius-btn);
  font-size: 15px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase;
  cursor: pointer; touch-action: manipulation;
  transition: transform 0.12s ease, opacity 0.12s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:active   { transform: scale(0.95); opacity: 0.88; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn--primary   { background: var(--clr-primary);   color: var(--clr-text); }
.btn--secondary { background: var(--clr-secondary);  color: var(--clr-text); }
.btn--rewarded  { background: var(--clr-green);      color: var(--clr-text); font-size: 13px; }
.btn--active    { background: var(--clr-accent);     color: #0d47a1; }
.btn--icon {
  min-width: var(--icon-btn-sz); width: var(--icon-btn-sz);
  min-height: var(--icon-btn-sz); height: var(--icon-btn-sz);
  padding: 0; border-radius: 50%; background: var(--clr-secondary); font-size: 20px; color: var(--clr-text);
}

/* ── HUD ────────────────────────────────────────────────────────── */
.hud {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  padding-top: calc(10px + var(--safe-t));
  padding-left: calc(14px + var(--safe-l));
  padding-right: calc(14px + var(--safe-r));
  pointer-events: none;
}
.hud__btn {
  pointer-events: auto; width: 44px; height: 44px; border: none; border-radius: 50%;
  background: rgba(0,0,0,0.45); color: var(--clr-text); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  touch-action: manipulation; -webkit-tap-highlight-color: transparent;
  font-size: 18px; transition: background 0.15s ease; flex-shrink: 0;
}
.hud__btn:active { background: rgba(0,0,0,0.65); }
.hud__center {
  display: flex; flex-direction: column; align-items: center; gap: 0;
}
.hud__timer {
  font-size: 28px; font-weight: 900; color: #22DD55;
  text-shadow: 0 1px 6px rgba(0,0,0,0.7);
  transition: color 0.3s ease;
  line-height: 1;
}
.hud__timer--warn   { color: #FFD600; }
.hud__timer--danger { color: #FF2D87; }
.hud__level { font-size: 11px; font-weight: 700; letter-spacing: 2px; color: var(--clr-text-dim); }
.hud__right { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; }
.hud__score {
  font-size: 20px; font-weight: 800; color: var(--clr-accent);
  text-shadow: 0 1px 6px rgba(0,0,0,0.7);
}
.hud__lives { font-size: 16px; letter-spacing: 2px; filter: drop-shadow(0 1px 4px rgba(0,0,0,0.6)); }

/* ── Toast ──────────────────────────────────────────────────────── */
.hud-toast {
  position: fixed;
  top: calc(var(--safe-t) + 6px);
  left: 50%; transform: translateX(-50%) translateY(-8px);
  background: rgba(255,215,0,0.92); color: #1a1a2e;
  font-size: 14px; font-weight: 800; letter-spacing: 1px;
  padding: 6px 18px; border-radius: 20px; white-space: nowrap;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease; z-index: 20;
}
.hud-toast--hidden  { opacity: 0; transform: translateX(-50%) translateY(-12px); }
.hud-toast--visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Stats grid ─────────────────────────────────────────────────── */
.stats-grid { width: 100%; display: flex; flex-direction: column; gap: 0; }
.stats-grid__row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--clr-border); }
.stats-grid__label { font-size: 13px; color: var(--clr-text-dim); letter-spacing: 0.5px; }
.stats-grid__value { font-size: 18px; font-weight: 700; }
.stats-grid__row--accent .stats-grid__value { color: var(--clr-accent); font-size: 22px; }

/* ── Shop ───────────────────────────────────────────────────────── */
.shop-balance { display: flex; align-items: center; gap: 8px; font-size: 26px; font-weight: 800; color: var(--clr-accent); }
.shop-items { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.shop-card { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 14px 10px; background: rgba(255,255,255,0.06); border-radius: 12px; border: 1px solid var(--clr-border); }
.shop-card--active { border-color: var(--clr-accent); background: rgba(255,215,0,0.08); }
.shop-card__preview { width: 48px; height: 48px; border-radius: 50%; border: 3px solid rgba(255,255,255,0.2); flex-shrink: 0; }
.shop-card__name { font-size: 12px; font-weight: 600; letter-spacing: 0.5px; text-align: center; }
.shop-card .btn { min-width: unset; width: 100%; min-height: 36px; font-size: 11px; padding: 0 8px; }

/* ── Misc ───────────────────────────────────────────────────────── */
.coin-icon { display: inline-block; width: 16px; height: 16px; background: var(--clr-accent); border-radius: 50%; border: 2px solid rgba(255,255,255,0.35); flex-shrink: 0; }
.btn-row   { display: flex; gap: 12px; justify-content: center; }

/* ── Shop scrollbar ─────────────────────────────────────────────── */
.screen__inner--shop::-webkit-scrollbar { width: 4px; }
.screen__inner--shop::-webkit-scrollbar-track { background: transparent; }
.screen__inner--shop::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 2px; }

/* ── GPU hints ──────────────────────────────────────────────────── */
#game-canvas, .progress-bar__fill, .hud-toast, .screen { will-change: transform; }