/* ==========================================================================
   HSK Scientific Trainer — Custom Styles & Animations
   ========================================================================== */

:root {
  --font-hanzi: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.font-hanzi {
  font-family: var(--font-hanzi);
}

/* Nascondi scrollbar per tab orizzontali */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* ==========================================================================
   3D Flip Card (SRS & Intro Flashcards)
   ========================================================================== */
.flip-scene {
  perspective: 1200px;
}

.flip-card {
  position: relative;
  width: 100%;
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.flip-card.is-flipped {
  transform: rotateY(180deg);
}

.flip-card-face {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.flip-card-back {
  transform: rotateY(180deg);
}

/* ==========================================================================
   Gestione Globale Visibilità Pinyin (Sempre | Hover | Nascosto)
   ========================================================================== */
body[data-pinyin-mode="hover"] .pinyin-dynamic {
  opacity: 0;
  filter: blur(3px);
  transition: opacity 0.2s ease, filter 0.2s ease;
}

body[data-pinyin-mode="hover"] .pinyin-group:hover .pinyin-dynamic,
body[data-pinyin-mode="hover"] .pinyin-dynamic:hover {
  opacity: 1;
  filter: blur(0);
}

body[data-pinyin-mode="hidden"] .pinyin-dynamic {
  visibility: hidden;
  opacity: 0;
}

/* Quando la risposta è stata rivelata, mostra sempre il Pinyin */
.pinyin-revealed .pinyin-dynamic {
  visibility: visible !important;
  opacity: 1 !important;
  filter: none !important;
}

/* ==========================================================================
   Animazioni Feedback Scientifico & Fluency Blitz
   ========================================================================== */
@keyframes shakeError {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

.animate-shake {
  animation: shakeError 0.42s ease-in-out;
}

@keyframes popSuccess {
  0% { transform: scale(1); }
  45% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.animate-pop {
  animation: popSuccess 0.32s ease-out;
}

@keyframes blitzMatchOut {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.06);
    background-color: #d1fae5;
    border-color: #10b981;
  }
  100% {
    transform: scale(0.85);
    opacity: 0;
  }
}

.blitz-matched {
  animation: blitzMatchOut 0.28s ease-out forwards;
}

@keyframes pulseAudio {
  0%, 100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.45); }
  50% { box-shadow: 0 0 0 10px rgba(79, 70, 229, 0); }
}

.audio-playing {
  animation: pulseAudio 1.2s infinite;
}

/* Stile per mattoncini Sentence Builder / Dictation */
.token-brick {
  user-select: none;
  transition: all 0.16s cubic-bezier(0.4, 0, 0.2, 1);
}

.token-brick:active {
  transform: scale(0.95);
}

/* Stile Cloaked Roleplay (Dialoghi i+1) */
.cloaked-line {
  filter: blur(6px);
  user-select: none;
  transition: filter 0.25s ease;
}

.cloaked-line.revealed,
.cloaked-line:hover {
  filter: blur(0);
}