/* ============================================================
   Screen-specific layout
   ============================================================ */

/* ---------- Top app bar ---------- */
.appbar {
  display: flex; align-items: center; gap: var(--s-2);
  margin-bottom: var(--s-3);
}
.appbar .title {
  font-family: var(--font-display); font-weight: var(--fw-black);
  font-size: var(--t-lg); letter-spacing: -0.01em;
}
.appbar .spacer { flex: 1; }

/* ---------- Splash / boot ---------- */
#screen-splash { align-items: center; justify-content: center; text-align: center; gap: var(--s-5); }
.wordmark {
  font-family: var(--font-display); font-weight: var(--fw-black);
  font-size: var(--t-3xl); line-height: 0.92; letter-spacing: -0.02em;
  filter: drop-shadow(0 6px 24px rgba(255,78,205,0.4));
}
.wordmark span { display: inline-block; }
.tagline { font-size: var(--t-md); color: var(--c-fog); font-weight: var(--fw-bold); }
.boot-dots { display: flex; gap: 8px; }
.boot-dots i { width: 12px; height: 12px; border-radius: 50%; background: var(--cat-b); animation: pulse-soft 1s infinite; }
.boot-dots i:nth-child(2){ animation-delay: 0.15s; }
.boot-dots i:nth-child(3){ animation-delay: 0.3s; }

/* ---------- Home / menu ---------- */
#screen-home .hero-mark { text-align: center; margin: var(--s-3) 0 var(--s-2); }
#screen-home .hero-mark .wordmark { font-size: var(--t-2xl); }
.mascot-stage {
  position: relative; height: clamp(150px, 26vh, 230px);
  display: grid; place-items: center; margin: var(--s-2) 0;
}
.mascot-stage canvas { width: 100%; height: 100%; }
.home-stats { display: flex; justify-content: center; gap: var(--s-2); margin-bottom: var(--s-4); flex-wrap: wrap; }
.home-actions { display: flex; flex-direction: column; gap: var(--s-3); }
.mini-actions { display: flex; gap: var(--s-2); }
.mini-actions .btn { flex: 1; min-height: 50px; font-size: var(--t-sm); }

/* ---------- Mode select ---------- */
.mode-list { display: flex; flex-direction: column; gap: var(--s-3); }
.mode {
  display: flex; align-items: center; gap: var(--s-4);
  padding: var(--s-4) var(--s-5);
  border-radius: var(--r-lg);
  background: var(--glass); border: 1px solid var(--glass-border);
  box-shadow: var(--sh-1), var(--inset-hi);
  text-align: left; overflow: hidden; position: relative;
  transition: transform var(--dur-1) var(--e-spring), border-color var(--dur-2);
}
.mode:active { transform: scale(0.98); }
.mode::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 6px;
  background: linear-gradient(var(--cat-a), var(--cat-b));
}
.mode .em { font-size: 2.2rem; filter: drop-shadow(0 3px 6px rgba(0,0,0,0.4)); }
.mode .mt { font-family: var(--font-display); font-weight: var(--fw-black); font-size: var(--t-md); }
.mode .md { font-size: var(--t-xs); color: var(--c-fog); }
.mode .go { margin-left: auto; font-size: 1.4rem; color: var(--c-fog); }

/* ---------- Category grid ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-2); }
.cat {
  aspect-ratio: 1 / 1.06;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 6px; border-radius: var(--r-lg);
  background: var(--glass); border: 1.5px solid var(--glass-border);
  box-shadow: var(--inset-hi);
  position: relative; overflow: hidden;
  transition: transform var(--dur-1) var(--e-spring), border-color var(--dur-2);
}
.cat:active { transform: scale(0.95); }
.cat::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 80% at 50% 120%, color-mix(in srgb, var(--cc,#fff) 40%, transparent), transparent 70%);
  opacity: 0.5;
}
.cat .em { font-size: 2rem; position: relative; filter: drop-shadow(0 3px 5px rgba(0,0,0,0.4)); }
.cat .cn { font-family: var(--font-display); font-weight: var(--fw-black); font-size: var(--t-2xs); text-align: center; position: relative; }
.cat.sel { border-color: var(--cc); box-shadow: 0 0 0 2px var(--cc) inset, var(--inset-hi); }
.cat .cnt { position: absolute; top: 6px; right: 8px; font-size: var(--t-2xs); color: var(--c-fog); font-weight: var(--fw-bold); }
.cat.all { grid-column: span 3; aspect-ratio: auto; flex-direction: row; gap: var(--s-3); padding: var(--s-4); justify-content: flex-start; }
.cat.all .em { font-size: 1.7rem; }
.cat.all .cn { font-size: var(--t-md); }

/* ---------- Game screen ---------- */
#screen-game { display: flex; flex-direction: column; transition: transform var(--dur-2) var(--e-out); }
/* Lift the game screen when the iOS keyboard is open so the input stays visible. */
body.kb-open #screen-game { transform: translateY(calc(-1 * var(--kb, 0px) * 0.55)); }
.game-top { display: flex; align-items: center; gap: var(--s-2); margin-bottom: var(--s-3); }
.game-top .spacer { flex: 1; }

.progress-rail {
  position: absolute; left: max(var(--safe-l), 6px); top: 22%; bottom: 22%;
  width: 8px; border-radius: var(--r-pill);
  background: rgba(255,255,255,0.08); overflow: hidden;
  z-index: var(--z-hud);
}
.progress-rail > i {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: linear-gradient(var(--cat-a), var(--cat-b));
  box-shadow: 0 0 12px var(--cat-b);
  border-radius: inherit;
  transition: height var(--dur-4) var(--e-spring);
}
.progress-rail .climber {
  position: absolute; left: 50%; width: 22px; height: 22px;
  transform: translate(-50%, 50%);
  transition: bottom var(--dur-4) var(--e-spring);
  font-size: 18px; text-align: center; line-height: 22px;
  filter: drop-shadow(0 0 6px var(--cat-b));
}

.riddle-wrap { flex: 1; display: flex; flex-direction: column; justify-content: center; gap: var(--s-4); min-height: 0; }
.riddle-card {
  position: relative;
  padding: var(--s-6) var(--s-5);
  border-radius: var(--r-xl);
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  box-shadow: var(--sh-3), var(--inset-hi);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  text-align: center;
}
.riddle-card .cat-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--t-xs); font-weight: var(--fw-bold); color: var(--c-fog);
  margin-bottom: var(--s-3);
}
.riddle-card .em-big { font-size: 3rem; margin-bottom: var(--s-2); filter: drop-shadow(0 6px 12px rgba(0,0,0,0.4)); }
.riddle-card .q {
  font-family: var(--font-display); font-weight: var(--fw-bold);
  font-size: var(--t-lg); line-height: var(--lh-snug);
  white-space: pre-line; text-wrap: balance;
}
.riddle-card .diff { position: absolute; top: var(--s-4); right: var(--s-4); display: flex; gap: 3px; }
.riddle-card .diff i { width: 7px; height: 7px; border-radius: 50%; background: var(--glass-hi); }
.riddle-card .diff i.on { background: var(--cat-b); box-shadow: 0 0 8px var(--cat-b); }
.riddle-card.good { animation: correct-punch var(--dur-3) var(--e-spring); }
.riddle-card.bad  { animation: shake 0.5s; }

.game-input { display: flex; flex-direction: column; gap: var(--s-3); }
.game-tools { display: flex; gap: var(--s-2); }
.game-tools .btn { flex: 1; min-height: 50px; font-size: var(--t-sm); }

/* reveal / fun fact after answer */
.reveal {
  text-align: center; padding: var(--s-4);
  border-radius: var(--r-lg);
  background: color-mix(in srgb, var(--c-good) 12%, var(--glass));
  border: 1px solid color-mix(in srgb, var(--c-good) 40%, var(--glass-border));
  animation: pop-in var(--dur-3) var(--e-spring) both;
}
.reveal .ra { font-family: var(--font-display); font-weight: var(--fw-black); font-size: var(--t-xl); }
.reveal .rf { font-size: var(--t-sm); color: var(--c-mist); margin-top: 6px; }

/* ---------- Results ---------- */
#screen-results { text-align: center; }
.result-hero { display: flex; flex-direction: column; align-items: center; gap: var(--s-2); margin: var(--s-4) 0; }
.result-hero .em { font-size: 3.4rem; }
.result-hero .grade { font-family: var(--font-display); font-weight: var(--fw-black); font-size: var(--t-2xl); }
.big-score {
  font-family: var(--font-display); font-weight: var(--fw-black);
  font-size: var(--t-3xl); font-variant-numeric: tabular-nums;
  line-height: 1;
}
.result-rows { display: flex; flex-direction: column; gap: var(--s-2); text-align: left; margin: var(--s-4) 0; }
.result-row { display: flex; justify-content: space-between; align-items: center; padding: var(--s-3) var(--s-4); border-radius: var(--r-md); background: var(--glass); border: 1px solid var(--glass-border); }
.result-row .rk { color: var(--c-fog); font-weight: var(--fw-bold); font-size: var(--t-sm); }
.result-row .rv { font-family: var(--font-display); font-weight: var(--fw-black); font-variant-numeric: tabular-nums; }
.newbest { color: #2a1200; background: linear-gradient(135deg, var(--c-gold), var(--c-orange)); }

/* ---------- Settings / lists ---------- */
.list { display: flex; flex-direction: column; gap: var(--s-3); }
.section-title { font-family: var(--font-display); font-weight: var(--fw-black); font-size: var(--t-md); margin: var(--s-3) 0 var(--s-1); color: var(--c-mist); }
.grid-badges { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-2); }

/* howto steps */
.step { display: flex; gap: var(--s-3); align-items: flex-start; padding: var(--s-3) 0; }
.step .n { width: 34px; height: 34px; flex: 0 0 auto; border-radius: 50%; display: grid; place-items: center; font-family: var(--font-display); font-weight: var(--fw-black); background: linear-gradient(135deg, var(--cat-a), var(--cat-b)); color: #fff; }
.step .st { font-family: var(--font-display); font-weight: var(--fw-bold); }
.step .sd { font-size: var(--t-sm); color: var(--c-fog); }

/* install hint (iOS A2HS) */
.a2hs {
  display: flex; gap: var(--s-3); align-items: center;
  padding: var(--s-3) var(--s-4); border-radius: var(--r-md);
  background: color-mix(in srgb, var(--c-cyan) 12%, var(--glass));
  border: 1px dashed color-mix(in srgb, var(--c-cyan) 40%, var(--glass-border));
  font-size: var(--t-sm);
}