/* ==========================================================
   GLOBAL DARK THEME
========================================================== */
body {
  background: #000;
  color: #fff;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

/* Screens */
.screen {
  display: none;
  background: #000;
  color: #fff;
  min-height: 100vh;
  padding: 40px;
}

/* Visible screen */
.screen:not(.hidden) {
  display: block;
}

/* Required for JS screen switching */
.hidden {
  display: none !important;
}

/* Titles */
.title {
  font-size: 32px;
  margin-bottom: 30px;
  color: #fff;
}

/* ==========================================================
   LEVEL SELECT BUTTONS
========================================================== */
.levelBtn {
  background: #222;
  color: #fff;
  border: 1px solid #444;
  padding: 4px 8px;
  margin: 4px;
  font-size: 12px;
  border-radius: 4px;
  cursor: pointer;
  width: 70px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.levelBtn:hover {
  background: #333;
}

/* ==========================================================
   MUSIC CONTROLS
========================================================== */
.music-controls {
  position: fixed;
  top: 10px;
  right: 10px;
}

.iconBtn {
  background: #222;
  color: #fff;
  border: 1px solid #555;
  padding: 8px 12px;
  margin-left: 6px;
  border-radius: 6px;
  cursor: pointer;
}

.iconBtn:hover {
  background: #333;
}

/* ==========================================================
   SCREEN 2 — CHUNK PUZZLE / ARRANGE MODE
========================================================== */

/* Replay button at the top */
.replay-top {
  margin-bottom: 20px;
  font-size: 22px;
  padding: 10px 20px;
  background: #222;
  border: 1px solid #555;
  border-radius: 8px;
}

/* ⭐⭐⭐ FIXED TIMER — ALWAYS VISIBLE ABOVE PROGRESS BAR ⭐⭐⭐ */
#screen2Timer {
  position: absolute;
  top: 70px;          /* BELOW progress bar (usually ~50px tall) */
  right: 20px;
  font-size: 32px;
  font-weight: bold;
  color: #ff4444;
  z-index: 999999;    /* ABOVE everything */
  pointer-events: none;
}

/* Scrambled chunks container */
.chunk-container {
  display: block;
  text-align: center;
  margin-top: 20px;
}

/* Chunk buttons */
.chunkBtn {
  font-size: 28px;
  padding: 18px 26px;
  margin: 10px;
  border-radius: 12px;
  background: #222;
  color: #fff;
  border: 2px solid #555;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 140px;
  min-height: 70px;
  text-align: center;

  cursor: grab;
  -webkit-user-drag: element;
  user-select: none;
  touch-action: none;
}

.chunkBtn:active {
  cursor: grabbing;
}

.chunkBtn:hover {
  background: #333;
}

/* Drop lines container */
.drop-lines {
  display: block;
  text-align: center;
  margin-top: 30px;
}

/* Drop line boxes */
.dropLine {
  width: 160px;
  height: 70px;
  border: 3px dashed #888;
  border-radius: 10px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  font-size: 26px;
  color: #ccc;
  margin: 10px;
}

/* Correct placement */
.dropLine.correct {
  border-color: #4caf50;
  background: #1b3d1b;
  color: #4caf50;
}

/* ==========================================================
   SCREEN 3 — MEANING SCREEN
========================================================== */

.meaning-box {
  font-size: 26px;
  margin: 20px auto 30px auto;
  padding: 16px 20px;
  max-width: 480px;
  text-align: center;
  background: #111;
  border-radius: 12px;
  border: 1px solid #444;
}

.summary-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 20px auto;
  max-width: 480px;
}

.summary-row {
  background: #111;
  border: 1px solid #444;
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.summary-hiragana {
  font-size: 26px;
  color: #fff;
}

.summary-romaji {
  font-size: 18px;
  color: #bbb;
}

.summary-english {
  font-size: 18px;
  color: #4caf50;
}

.summary-controls {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  gap: 20px;
}

/* ==========================================================
   EXPLANATION BLOCK
========================================================== */

.explanation-box {
  margin: 20px auto 40px auto;
  max-width: 480px;
  padding: 16px 20px;
  background: #111;
  border: 1px solid #444;
  border-radius: 10px;
  font-size: 18px;
  color: #ccc;
  line-height: 1.6;
  white-space: pre-line;
}

/* ==========================================================
   SESSION SUMMARY
========================================================== */

.session-summary-box {
  margin-top: 20px;
  padding: 20px;
  background: #ffffffdd;
  border-radius: 12px;
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
  font-size: 1.2rem;
}

.session-line {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

.session-controls {
  margin-top: 25px;
  display: flex;
  justify-content: center;
  gap: 20px;
}

/* ==========================================================
   LEVEL BLOCKS (L1 vs L2)
========================================================== */

.level-block {
  margin-top: 20px;
  padding: 10px 0;
}

.level-block.hidden {
  display: none !important;
}

.instruction-line {
  font-size: 1.1rem;
  color: #fff;
  text-align: center;
  margin: 6px 0 10px 0;
}

/* ==========================================================
   LEVEL 2 — MCQ MODE
========================================================== */

.mcq-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.mcqBtn {
  padding: 14px 18px;
  font-size: 1.2rem;
  border-radius: 8px;
  border: 2px solid #444;
  background: #222;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease;
}

.mcqBtn:hover {
  background: #333;
}