/**
 * ebook-engine-v2.css — Universal styles for all Find Luna books
 * No book-specific colors or images. Theming comes from book.json.
 */

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#1B2A4A;
  --orange:#F47920;
  --cream:#FFFCF5;
  --blue:#83B6DD;
  --gold:#E9C46A;
  --text:#1B2A4A;
}
body{
  font-family:'Quicksand',sans-serif;
  background:var(--cream);
  color:var(--text);
  overflow:hidden;
  touch-action:manipulation;
  -webkit-tap-highlight-color:transparent;
  user-select:none
}

/* ── Screen system ── */
#welcome,#cover,#intro-screen,#app,#toc-screen{display:none}
#cover.show,#intro-screen.show{display:flex!important}
#app.active,#toc-screen.show{display:block!important}
#app{position:fixed;inset:0;display:none}

/* ── Welcome screen ── */
#welcome{
  position:fixed;inset:0;
  background:linear-gradient(180deg,#4a90d9 0%,#87CEEB 50%,#98d8c8 100%);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  z-index:400;cursor:pointer
}
.welcome-luna{font-size:clamp(5rem,20vw,10rem);animation:luna-bounce 2s ease-in-out infinite}
.welcome-title{
  font-family:'Fredoka One',cursive;font-size:clamp(2rem,8vw,4rem);
  color:#fff;-webkit-text-stroke:2px #000;paint-order:stroke fill;
  text-align:center;margin-bottom:40px
}
.start-btn-large{
  background:linear-gradient(135deg,#ff6b35,#ff8c42);color:white;border:none;
  padding:20px 60px;border-radius:40px;
  font-family:'Fredoka One',cursive;font-size:clamp(1.5rem,5vw,2.5rem);
  cursor:pointer;box-shadow:0 8px 30px rgba(255,107,53,.5);
  transition:transform .2s;letter-spacing:1px
}
.start-btn-large:active{transform:scale(.96)}
.welcome-sub{margin-top:30px;font-size:clamp(.9rem,2.5vw,1.1rem);color:rgba(255,255,255,.8);text-align:center}

/* ── Cover screen ── */
.cover-hero{position:fixed;inset:0;background-size:cover;background-position:center;z-index:-1;filter:brightness(0.85) contrast(0.9)}
#cover{background:linear-gradient(180deg,rgba(27,42,74,.75) 0%,rgba(27,42,74,.4) 30%,transparent 50%,rgba(27,42,74,.2) 70%,rgba(27,42,74,.85) 100%);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem 1rem 4rem;z-index:200;cursor:pointer}
#welcome.hidden,#cover.hidden,#intro-screen.hidden{display:none!important}
.cover-title{
  font-family:'Fredoka One',cursive;font-weight:700;
  font-size:clamp(2rem,8vw,4rem);color:white;text-align:center;margin-bottom:.5rem
;margin-top:1rem}
.cover-subtitle{font-size:clamp(1rem,4vw,1.5rem);color:var(--blue);margin-bottom:auto;text-align:center}
.cover-start{
  background:var(--orange);color:white;border:none;
  font-size:1.2rem;font-weight:700;padding:.8rem 2.5rem;
  border-radius:50px;cursor:pointer;transition:transform .1s;
  display:block;margin:.5rem auto;
}
.cover-start:active{transform:scale(.95)}
.cover-note{color:rgba(255,255,255,.5);font-size:.85rem;margin-top:1.5rem;text-align:center}
.cover-toc-btn{
  background:rgba(255,255,255,.15);color:white;border:2px solid rgba(255,255,255,.3);
  font-size:.9rem;font-weight:600;padding:.5rem 1.2rem;border-radius:20px;
  cursor:pointer;display:block;margin:.5rem auto;
}
.cover-toc-btn:hover{background:rgba(255,255,255,.25)}
.cover-lang-btns{display:flex;gap:.5rem;margin-bottom:0;margin-top:0;justify-content:center}
.cover-lang-btn{  background:rgba(255,255,255,.15);border:2px solid rgba(255,255,255,.3);
  color:white;padding:.4rem 1rem;border-radius:20px;
  font-size:.85rem;font-weight:600;cursor:pointer
}
.cover-lang-btn.active{background:rgba(255,255,255,.3);border-color:white}

/* ── Intro screen ── */
#intro-screen{
  position:fixed;inset:0;
  background:linear-gradient(135deg,#1B2A4A,#243359);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  z-index:190
}
.intro-card{
  background:rgba(255,255,255,.08);border:2px solid rgba(255,255,255,.15);
  border-radius:24px;padding:clamp(1.5rem,5vw,2.5rem);
  max-width:600px;width:100%;text-align:center
}
.intro-title{font-family:'Fredoka One',cursive;font-size:clamp(1.6rem,5vw,2.2rem);color:var(--orange);margin-bottom:1.5rem}
.intro-step{display:flex;align-items:center;gap:1rem;margin-bottom:1rem;text-align:left;background:rgba(255,255,255,.05);padding:.8rem 1rem;border-radius:12px}
.intro-step-icon{font-size:1.8rem;min-width:40px;text-align:center}
.intro-step-text{font-size:clamp(.9rem,3vw,1.05rem);color:rgba(255,255,255,.9);line-height:1.4}
.intro-narr{font-size:.9rem;color:rgba(255,255,255,.6);margin-top:.8rem;min-height:1.2em}
.start-btn{
  background:linear-gradient(135deg,#ff6b35,#ff8c42);color:white;border:none;
  padding:.8rem 2.5rem;border-radius:40px;
  font-family:'Fredoka One',cursive;font-size:clamp(1rem,4vw,1.5rem);
  cursor:pointer;margin-top:1.5rem;transition:transform .2s
}
.start-btn:active{transform:scale(.96)}
.start-btn.hidden{opacity:0;pointer-events:none}

/* ── App / Scene ── */
#app{
  position:fixed;inset:0;
  background:#87CEEB;
}
#scene-wrapper{
  position:fixed;inset:0;overflow:hidden;
}
#scene-wrapper.alive .sparkle,
#scene-wrapper.alive .cloud,
#scene-wrapper.alive .firefly{opacity:.6}
.scene-bg,#scene-bg-img{
  position:absolute;width:100%;height:100%;
  object-fit:contain;display:block;pointer-events:none;
  animation:ken-burns 15s ease-in-out infinite
}
@keyframes ken-burns{
  0%{transform:scale(1)}
  50%{transform:scale(1.03)}
  100%{transform:scale(1)}
}

/* ── Header ── */
.header{
  position:fixed;top:0;left:0;right:0;height:52px;
  background:rgba(255,255,255,.95);backdrop-filter:blur(8px);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 1rem;z-index:100;
  border-bottom:2px solid rgba(27,42,74,.08)
}
.lang-btns{display:flex;gap:.3rem}
.lang-btn{
  background:none;border:2px solid var(--blue);color:var(--navy);
  padding:.2rem .6rem;border-radius:20px;
  font-size:.75rem;font-weight:600;cursor:pointer;transition:all .15s
}
.lang-btn.active,.lang-btn:active{background:var(--navy);color:white;border-color:var(--navy)}
.header-right{display:flex;gap:.5rem;align-items:center}
.icon-btn{
  background:none;border:none;color:var(--navy);
  font-size:1.2rem;cursor:pointer;padding:.3rem;border-radius:8px;
  transition:background .15s
}
.icon-btn:active{background:rgba(27,42,74,.08)}
#scene-counter{font-size:.8rem;color:var(--text);font-weight:600;opacity:.7}
.nav-btn{position:fixed;bottom:5rem;display:none}

/* ── Found bar ── */
#found-bar{
  position:fixed;top:60px;left:50%;transform:translateX(-50%);
  background:rgba(27,42,74,.9);color:white;
  padding:.4rem 1.2rem;border-radius:20px;
  font-size:.85rem;z-index:60;display:block;white-space:nowrap
}

/* ── Hotspots ── */
.hotspot{
  position:absolute;cursor:pointer;
  border-radius:8px;opacity:0;
  transition:opacity .2s;
  z-index:15
}
.hotspot.found{opacity:1!important;background:transparent!important;border:none!important;pointer-events:none}
.hotspot.found::after{content:'✓';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:2.5rem;color:#FFD700;text-shadow:0 2px 6px rgba(0,0,0,.6),0 0 10px rgba(255,215,0,.4);animation:checkPop 1.2s ease-out forwards;pointer-events:none}
.hotspot.found-flash{animation:found-flash .6s ease-out}
.hotspot.luna{z-index:25}
.hotspot.debug{opacity:.4!important;background:rgba(255,0,0,.3);border:2px solid red!important}

/* ── Narration bar ── */
.narr-text{
  position:fixed;bottom:20px;left:50%;transform:translateX(-50%);
  max-width:min(900px,90vw);
  padding:.9rem 1.4rem;
  background:rgba(27,42,74,.85);
  border-radius:16px;
  backdrop-filter:blur(8px);
  font-size:clamp(.95rem,3vw,1.15rem);
  line-height:1.5;color:white;
  text-align:center;
  z-index:50;
  box-shadow:0 4px 20px rgba(0,0,0,.2);
}

/* ── Next / Home buttons ── */
#next-btn{
  position:fixed;right:1.5rem;bottom:5rem;
  background:var(--orange);color:white;border:none;
  padding:.6rem 1.2rem;border-radius:25px;
  font-size:.9rem;font-weight:700;cursor:pointer;
  display:block;z-index:100;box-shadow:0 4px 16px rgba(244,121,32,.3)
}
#home-btn{
  position:fixed;left:1rem;bottom:5rem;
  background:var(--navy);color:white;border:none;
  padding:.5rem 1rem;border-radius:20px;
  font-size:.8rem;cursor:pointer;display:block;z-index:100
}
.nav-btn.show{display:block}

/* ── Celebration overlay ── */
#celebration-overlay{
  position:fixed;inset:0;
  background:rgba(27,42,74,.92);z-index:300;
  display:none;flex-direction:column;align-items:center;justify-content:center
}
#celebration-overlay.show{display:flex}
.celeb-title{color:white;font-size:clamp(2rem,8vw,3.5rem);font-weight:700;text-align:center;margin-bottom:1rem}
.celeb-animal{font-size:clamp(4rem,15vw,6rem);margin:1rem 0}
.celeb-sub{color:var(--gold);font-size:clamp(1.2rem,4vw,1.6rem);text-align:center}
.celeb-next{
  display:inline-block;background:var(--orange);color:white;
  padding:.8rem 2rem;border-radius:50px;
  font-size:1.1rem;font-weight:700;cursor:pointer;
  margin-top:2rem;border:none
}
.celeb-next:active{transform:scale(.95)}

/* ── Memory game / Photo album ── */
#memory-game,#photo-album{
  position:fixed;inset:0;background:rgba(27,42,74,.95);z-index:250;
  display:none;flex-direction:column;align-items:center;justify-content:center
}
#memory-game.show,#photo-album.show{display:flex}

/* ── TOC screen ── */
#toc-screen{
  position:fixed;inset:0;
  background:rgba(27,42,74,.97);z-index:180;overflow-y:auto
}
.toc-inner{max-width:500px;margin:0 auto;padding:2rem 1.5rem}
.toc-title{color:white;font-size:1.5rem;font-weight:700;text-align:center;margin-bottom:1.5rem}
.toc-book-row{display:flex;flex-wrap:wrap;gap:.8rem;justify-content:center}
.toc-scene-btn{
  background:white;color:var(--navy);border:none;
  padding:.6rem 1rem;border-radius:12px;
  font-size:.85rem;font-weight:600;cursor:pointer;
  min-width:60px;text-align:center;transition:transform .1s
}
.toc-scene-btn:active{transform:scale(.93)}
.toc-scene-btn.current{background:var(--orange);color:white}
.close-toc{
  background:white;color:var(--navy);border:none;
  padding:.7rem 2rem;border-radius:30px;
  font-size:1rem;font-weight:700;cursor:pointer;
  display:block;margin:1.5rem auto 0;width:100%;max-width:300px
}

/* ── Animations ── */
@keyframes found-flash{0%{background:rgba(255,220,100,.8);transform:scale(1.1)}100%{background:rgba(255,220,100,.3);transform:scale(1)}}
@keyframes luna-bounce{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-20px)}
}
@keyframes popIn{
  0%{transform:translate(-50%,-50%) scale(0);opacity:0}
  70%{transform:translate(-50%,-50%) scale(1.1)}
  100%{transform:translate(-50%,-50%) scale(1);opacity:1}
}
@keyframes emojiPop{
  0%{transform:translate(-50%,-50%) scale(0);opacity:1}
  50%{transform:translate(-50%,-50%) scale(1.3)}
  100%{transform:translate(-50%,-50%) scale(0);opacity:0}
}
@keyframes sparkle-float{
  0%{opacity:0;transform:translateY(0)}
  20%{opacity:.8}
  100%{opacity:0;transform:translateY(-100px)}
}
@keyframes cloud-drift{
  0%{transform:translateX(-100%)}
  100%{transform:translateX(calc(100vw + 100%))}
}
@keyframes firefly-glow{
  0%,100%{opacity:0;transform:translate(0,0)}
  25%{opacity:.8;transform:translate(10px,-15px)}
  50%{opacity:0;transform:translate(20px,5px)}
  75%{opacity:.6;transform:translate(-5px,-10px)}
}