@import url('https://fonts.googleapis.com/css2?family=Comfortaa:wght@700&family=Quicksand:wght@600;700&display=swap');

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

:root {
  --font-display: 'Comfortaa', cursive;
  --font-body:    'Quicksand', sans-serif;
  --theme-accent: #16a34a;
}

html, body {
  width:100%; height:100%; overflow:hidden;
  font-family: var(--font-body);
  user-select:none; -webkit-tap-highlight-color:transparent;
  transition: background 0.5s ease;
}

/* ── Scene layer ── */
#scene-layer { position:fixed; inset:0; z-index:0; pointer-events:none; }
.scene-item {
  position:absolute; pointer-events:none; opacity:0.25;
  animation: sceneFloat var(--sd,3.5s) ease-in-out infinite alternate;
}
@keyframes sceneFloat {
  0%   { transform:translateY(0) rotate(-4deg) scale(1); }
  100% { transform:translateY(-10px) rotate(4deg) scale(1.04); }
}

#trail-canvas { position:fixed; inset:0; z-index:4; pointer-events:none; }

/* ── Play stage ── */
#stage {
  position:fixed; inset:0; z-index:3;
  display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  gap:0.4rem; padding-bottom:6rem;
}

#prompt-emoji {
  font-size:clamp(6rem,18vw,11rem); line-height:1;
  position:relative; z-index:5;
  filter:drop-shadow(0 4px 14px rgba(0,0,0,0.1));
  animation:promptBounce 0.38s cubic-bezier(.34,1.56,.64,1);
}
@keyframes promptBounce {
  0%  {transform:scale(0.4) translateY(12px);opacity:0}
  100%{transform:scale(1) translateY(0);opacity:1}
}
#prompt-word {
  font-family: var(--font-display);
  font-size:clamp(2rem,5vw,3.2rem);
  color:var(--theme-accent);
  position:relative; z-index:5;
  animation:promptBounce 0.38s cubic-bezier(.34,1.56,.64,1) 0.05s both;
}

/* ── Letter card ── */
#card {
  width:clamp(220px,32vw,340px);
  height:clamp(255px,37vw,395px);
  border-radius:28px;
  background:rgba(255,255,255,0.96);
  border:3px solid var(--theme-accent);
  display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:0.3rem;
  box-shadow:0 16px 60px rgba(0,0,0,0.1);
  transition:border-color 0.2s;
  position:relative; z-index:5; margin-top:0.3rem;
}
#card::before, #card::after {
  content:''; position:absolute;
  width:9px; height:9px; border-radius:50%;
  background:var(--theme-accent); opacity:0.25;
}
#card::before { top:12px; left:12px; box-shadow:calc(clamp(220px,32vw,340px) - 30px) 0 0 var(--theme-accent); }
#card::after  { bottom:12px; left:12px; box-shadow:calc(clamp(220px,32vw,340px) - 30px) 0 0 var(--theme-accent); }
#card.pop { animation:cardPop 0.4s cubic-bezier(.34,1.56,.64,1); }
@keyframes cardPop {
  0%{transform:scale(1)} 35%{transform:scale(1.1) rotate(-2deg)}
  65%{transform:scale(0.95) rotate(1.5deg)} 85%{transform:scale(1.03)} 100%{transform:scale(1)}
}
#card-letter {
  font-family: var(--font-display);
  font-size:clamp(7rem,18vw,12rem); line-height:1;
  color:var(--theme-accent); transition:color 0.15s;
}
#card-word {
  font-family: var(--font-body); font-weight:700;
  font-size:clamp(0.9rem,2vw,1.2rem);
  color:var(--theme-accent);
  letter-spacing:0.1em; text-transform:uppercase; opacity:0.7;
}
#card-swatch {
  width: clamp(100px, 16vw, 180px);
  height: clamp(100px, 16vw, 180px);
  border-radius: 50%;
  margin-bottom: 0.5rem;
  transition: background 0.3s ease;
  box-shadow: 0 4px 24px rgba(0,0,0,0.12);
}
#sub-prompt {
  font-family: var(--font-body); font-weight:600;
  font-size:clamp(0.75rem,1.6vw,0.95rem);
  color:rgba(0,0,0,0.25); margin-top:0.2rem;
  position:relative; z-index:5; transition:opacity 0.4s;
}

/* ── Quiz stage ── */
#quiz-stage {
  position:fixed; inset:0; z-index:3;
  display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  gap:1rem; padding-bottom:6rem;
}
#quiz-card {
  width:clamp(200px,35vw,340px);
  height:clamp(200px,35vw,340px);
  border-radius:28px;
  background:rgba(255,255,255,0.97);
  box-shadow:0 16px 60px rgba(0,0,0,0.1);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer;
  transition:transform 0.2s cubic-bezier(.34,1.56,.64,1);
  position:relative; z-index:5;
}
#quiz-card:active { transform:scale(0.96); }
#quiz-card.flip { animation:cardFlip 0.35s ease-out; }
@keyframes cardFlip {
  0%{transform:scale(1)} 40%{transform:scale(0.9) rotateY(15deg)} 100%{transform:scale(1)}
}
#quiz-emoji { font-size:clamp(5rem,16vw,9rem); line-height:1; }
#quiz-reveal {
  display:flex; flex-direction:column; align-items:center; gap:0.2rem;
  position:relative; z-index:5;
}
#quiz-question {
  font-family: var(--font-display);
  font-size:clamp(1.8rem,4.5vw,2.8rem);
  color:rgba(0,0,0,0.18); transition:all 0.3s;
}
#quiz-question.revealed { color:var(--theme-accent); }
#quiz-hint {
  font-family: var(--font-body); font-weight:600;
  font-size:clamp(0.8rem,1.8vw,1rem);
  color:rgba(0,0,0,0.28); transition:opacity 0.3s;
}
#quiz-next {
  font-family: var(--font-display); font-size:1rem;
  background:var(--theme-accent); color:white;
  border:none; border-radius:50px; padding:0.55rem 1.6rem;
  cursor:pointer; opacity:0; pointer-events:none;
  transition:opacity 0.3s, transform 0.15s;
  box-shadow:0 4px 16px rgba(0,0,0,0.12);
  position:relative; z-index:5;
}
#quiz-next.show { opacity:1; pointer-events:all; }
#quiz-next:active { transform:scale(0.95); }

/* ── Bottom bar ── */
#bottom-bar {
  position:fixed; bottom:0; left:0; right:0; z-index:20;
  display:flex; flex-direction:column; align-items:center;
  padding:0.5rem 1rem 0.75rem;
}
#theme-pill {
  display:flex; align-items:center; gap:4px;
  background:rgba(255,255,255,0.95);
  border-radius:20px;
  padding:6px 10px;
  box-shadow:0 6px 28px rgba(0,0,0,0.1);
  overflow-x:auto; max-width:calc(100vw - 2rem);
  scrollbar-width:none;
}
#theme-pill::-webkit-scrollbar { display:none; }

.t-btn-divider {
  width:1px; height:28px;
  background:rgba(0,0,0,0.1);
  margin:0 2px; flex-shrink:0;
}

.t-btn {
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  border:none; background:transparent;
  border-radius:14px; padding:7px 10px;
  cursor:pointer;
  transition:all 0.18s cubic-bezier(.34,1.56,.64,1);
  -webkit-tap-highlight-color:transparent; flex-shrink:0;
  min-width:44px; min-height:44px; gap:2px;
}
.t-btn-icon { font-size:1.4rem; line-height:1; display:block; }
.t-btn-label {
  font-family: var(--font-body); font-size:0.58rem; font-weight:700;
  color:rgba(0,0,0,0.45); letter-spacing:0.03em;
  display:block; white-space:nowrap;
}
.t-btn.active .t-btn-label { color:rgba(255,255,255,0.95); }
.t-btn:active { transform:scale(0.88); }
.t-btn.active {
  background:var(--theme-accent);
  transform:scale(1.08);
  box-shadow:0 4px 14px rgba(0,0,0,0.15);
  padding:6px 12px;
}
.t-btn-quiz.active { background:#f43f5e; }

/* ── Credit ── */
#credit {
  position:fixed; bottom:0.55rem; right:0.8rem; z-index:25;
  font-family: var(--font-body); font-size:0.58rem; font-weight:700;
  color:rgba(0,0,0,0.28); text-decoration:none; letter-spacing:0.02em;
  background:rgba(255,255,255,0.7); padding:3px 8px; border-radius:20px;
  backdrop-filter:blur(4px); transition:color 0.2s, background 0.2s;
}
#credit:hover { color:rgba(0,0,0,0.6); background:rgba(255,255,255,0.95); }
#credit strong { font-weight:700; }

/* ── Particles ── */
.particle-emoji {
  position:fixed; font-size:2rem; pointer-events:none; z-index:10;
  animation:emojiFly var(--dur) ease-out forwards;
}
@keyframes emojiFly {
  0%  {transform:translate(0,0) scale(0.3) rotate(0deg);opacity:1}
  65% {opacity:1}
  100%{transform:translate(var(--tx),var(--ty)) scale(1.2) rotate(var(--rot));opacity:0}
}
.shooting-star {
  position:fixed; width:3px; height:3px; border-radius:50%;
  background:white; pointer-events:none; z-index:5;
  box-shadow:0 0 6px 2px white;
  animation:shoot var(--sd2) linear forwards;
}
@keyframes shoot {
  0%{transform:translate(0,0);opacity:1}
  100%{transform:translate(var(--sx),var(--sy));opacity:0}
}

/* ── Mobile keys ── */
#mobile-keys {
  display:none; position:fixed;
  bottom:5.2rem; left:0; right:0; z-index:15;
  flex-wrap:wrap; gap:0.22rem;
  justify-content:center; padding:0.3rem 0.4rem;
}
.mob-key {
  font-family: var(--font-display); font-size:0.9rem;
  background:rgba(255,255,255,0.9); border:2px solid rgba(0,0,0,0.06);
  border-radius:8px; padding:0.3rem 0.48rem;
  cursor:pointer; color:#1e293b; transition:transform 0.1s;
  min-width:32px; text-align:center;
}
.mob-key:active { transform:scale(0.82); }

/* ── Flash ── */
body.flash { animation: flashBg 0.18s ease; }
@keyframes flashBg {
  0% { filter: brightness(1.18); }
  100% { filter: brightness(1); }
}

/* ── Responsive mobile ── */
@media(max-width:600px){
  #mobile-keys { display:flex; }
  #stage        { padding-bottom:14rem; gap:0.2rem; }
  #quiz-stage   { padding-bottom:14rem; }
  #prompt-emoji { font-size:4.5rem; }
  #quiz-emoji   { font-size:5.5rem; }
  #card { width:170px; height:200px; border-radius:20px; }
  #card-letter  { font-size:5.5rem; }
  #credit       { display:none; }
  #score        { font-size:0.85rem; padding:0.25rem 0.7rem; }
  .t-btn { padding:5px 8px; min-width:40px; }
  .t-btn-icon { font-size:1.2rem; }
  .t-btn-label { font-size:0.52rem; }
}

@media(max-height:640px){
  #stage { gap:0.1rem; padding-bottom:5.5rem; }
  #prompt-emoji { font-size:3rem; }
  #card { width:140px; height:160px; }
  #card-letter { font-size:4rem; }
}

/* ── Score + Share pills ── */
#score {
  position:fixed; top:1rem; right:1rem; z-index:30;
  background:rgba(255,255,255,0.92);
  border-radius:50px; padding:0.3rem 0.9rem;
  font-family: var(--font-display);
  font-size:1rem; color:#1e1b4b;
  display:flex; align-items:center; gap:5px;
  box-shadow:0 2px 14px rgba(0,0,0,0.08);
  height:36px;
}
#score.pop { animation:scorePop 0.3s cubic-bezier(.34,1.56,.64,1); }
@keyframes scorePop { 0%{transform:scale(1)} 50%{transform:scale(1.4)} 100%{transform:scale(1)} }
#share-btn {
  position:fixed; top:1rem; left:4rem; z-index:30;
  background:rgba(255,255,255,0.85); border:none;
  border-radius:12px; width:44px; height:44px;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; color:#44403c;
  box-shadow:0 2px 10px rgba(0,0,0,0.08);
  opacity:0.6; transition:opacity 0.2s;
}
#share-btn:hover { opacity:1; }
.share-label { display:none; }