:root {
  --bg: #07070f; --pnl: #10101a; --bdr: #1e1e2a;
  --cy: #00f5ff; --mg: #ff2bd6; --yl: #ffd83d;
  --rd: #ff3860; --gr: #3dffaa; --or: #ff9a3d;
  --txt: #f0f0f8; --dim: #555;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --jp: 'Noto Sans JP', sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  width: 100%; height: 100vh; height: 100dvh;
  background: var(--bg); color: var(--txt);
  font-family: var(--jp); overflow: hidden;
  -webkit-text-size-adjust: 100%; touch-action: manipulation;
}
#app {
  display: flex; flex-direction: column;
  height: 100vh; height: 100dvh;
  max-width: 680px; margin: 0 auto;
}

/* HEADER */
#header {
  flex-shrink: 0; padding: 10px 14px 8px;
  border-bottom: 1px solid var(--bdr);
  display: flex; align-items: center; gap: 8px;
}
.brand { font-family: var(--mono); font-size: 0.65rem; color: var(--mg); font-weight: 700; letter-spacing: 2px; white-space: nowrap; }
.brand span { color: var(--cy); }
.dir-btns { display: flex; gap: 3px; }
.dir-btn {
  background: none; border: 1px solid var(--bdr); color: var(--dim);
  font-family: var(--mono); font-size: 0.62rem; padding: 4px 9px;
  border-radius: 4px; cursor: pointer; letter-spacing: 1px; transition: 0.1s;
  white-space: nowrap;
}
.dir-btn.active.ja-en { border-color: var(--cy); color: var(--cy); background: rgba(0,245,255,.06); }
.dir-btn.active.en-ja { border-color: var(--mg); color: var(--mg); background: rgba(255,43,214,.06); }
.hdr-space { flex: 1; }
.back-link { font-family: var(--mono); font-size: 0.6rem; color: var(--dim); text-decoration: none; letter-spacing: 1px; transition: color 0.1s; white-space: nowrap; }
.back-link:hover { color: var(--mg); }

/* PROGRESS */
#progress-bar {
  flex-shrink: 0; padding: 6px 14px;
  display: flex; align-items: center; gap: 8px;
}
.prog-dots { display: flex; gap: 4px; flex-wrap: wrap; }
.prog-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--bdr); transition: background 0.2s; }
.prog-dot.done { background: var(--gr); }
.prog-dot.current { background: var(--cy); }
.prog-dot.wrong-done { background: var(--rd); opacity: 0.6; }
.prog-label { font-family: var(--mono); font-size: 0.58rem; color: var(--dim); letter-spacing: 1px; margin-left: auto; }
.prog-score { color: var(--yl); font-weight: 700; }

/* SOURCE PANEL */
#source-panel { flex-shrink: 0; padding: 10px 16px 8px; text-align: center; }
.cat-label { font-family: var(--mono); font-size: 0.52rem; color: var(--dim); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 5px; }
.source-ja {
  font-weight: 900; color: var(--txt); line-height: 1.2;
  transition: font-size 0.2s;
}
.source-ja.mode-ja-en { font-size: clamp(1.8rem, 6vw, 2.6rem); font-family: var(--jp); }
.source-ja.mode-en-ja { font-size: clamp(1rem, 3.5vw, 1.5rem); font-family: var(--mono); letter-spacing: 0.5px; font-weight: 700; color: var(--cy); }
.source-reading { font-family: var(--mono); font-size: 0.68rem; color: var(--cy); letter-spacing: 1px; margin-top: 4px; transition: opacity 0.2s; }
.source-reading.mode-en-ja { font-family: var(--jp); font-size: 1.1rem; font-weight: 700; color: var(--mg); letter-spacing: 0; }
.source-reading.hidden { opacity: 0; pointer-events: none; }
.reading-toggle {
  background: none; border: 1px solid var(--bdr); color: var(--dim);
  font-family: var(--mono); font-size: 0.5rem; padding: 2px 6px;
  border-radius: 3px; cursor: pointer; letter-spacing: 1px; margin-left: 8px;
  transition: 0.1s; vertical-align: middle;
}
.reading-toggle.on { border-color: var(--cy); color: var(--cy); }
.reading-toggle.on.mode-en-ja { border-color: var(--mg); color: var(--mg); }

/* ASSEMBLY ZONE */
#assembly-zone {
  flex-shrink: 0; margin: 0 12px;
  min-height: 72px;
  background: var(--pnl); border: 1.5px solid var(--bdr); border-radius: 10px;
  padding: 10px 12px; display: flex; flex-wrap: wrap;
  align-items: center; gap: 7px; transition: border-color 0.2s;
}
#assembly-zone.correct { border-color: var(--gr); background: rgba(61,255,170,.04); }
#assembly-zone.wrong { border-color: var(--rd); background: rgba(255,56,96,.04); animation: shake-zone 0.3s; }
@keyframes shake-zone { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }
.assembly-placeholder { font-family: var(--mono); font-size: 0.62rem; color: var(--dim); letter-spacing: 2px; width: 100%; text-align: center; padding: 4px 0; }
.asm-tile {
  background: var(--cy); color: #000; font-family: var(--mono);
  font-size: 1rem; font-weight: 700; padding: 9px 16px;
  border-radius: 8px; cursor: pointer; transition: 0.1s;
  user-select: none; letter-spacing: 0.5px; white-space: nowrap;
}
.asm-tile:hover { background: #33faff; transform: translateY(-1px); }
.asm-tile.ja { font-family: var(--jp); font-size: 1.3rem; letter-spacing: 0; background: var(--mg); color: #000; }
.asm-tile.ja:hover { background: #ff70e8; }

/* ACTION ROW */
#action-row {
  flex-shrink: 0; padding: 6px 12px;
  display: flex; gap: 8px; align-items: center;
}
.act-btn {
  background: none; border: 1px solid var(--bdr); color: var(--dim);
  font-family: var(--mono); font-size: 0.65rem; padding: 7px 12px;
  border-radius: 6px; cursor: pointer; letter-spacing: 1px; transition: 0.1s;
}
.act-btn:hover { border-color: #444; color: #999; }
.act-btn.primary { flex: 1; background: var(--cy); color: #000; border-color: var(--cy); font-weight: 700; font-size: 0.85rem; letter-spacing: 2px; padding: 11px 12px; }
.act-btn.primary:hover { background: #33faff; }
.act-btn.primary.en-ja-mode { background: var(--mg); border-color: var(--mg); }
.act-btn.primary.en-ja-mode:hover { background: #ff70e8; }

/* TILE POOL */
#tile-pool {
  flex: 1; overflow-y: auto; padding: 10px 12px 12px;
  display: flex; flex-wrap: wrap; gap: 8px;
  align-content: flex-start;
  -webkit-overflow-scrolling: touch;
}
.pool-tile {
  background: var(--pnl); border: 1.5px solid var(--bdr); color: var(--txt);
  font-family: var(--mono); font-size: 0.9rem; font-weight: 700;
  padding: 9px 15px; border-radius: 8px; cursor: pointer; transition: 0.12s;
  user-select: none; letter-spacing: 0.5px; white-space: nowrap;
}
.pool-tile:hover { border-color: var(--cy); color: var(--cy); background: rgba(0,245,255,.04); transform: translateY(-1px); }
.pool-tile:active { transform: scale(0.95); }
.pool-tile.ja { font-family: var(--jp); font-size: 1.2rem; letter-spacing: 0; padding: 8px 12px; border-color: rgba(255,43,214,.2); }
.pool-tile.ja:hover { border-color: var(--mg); color: var(--mg); background: rgba(255,43,214,.04); }
.pool-tile.correct-reveal { border-color: var(--gr); color: var(--gr); background: rgba(61,255,170,.07); pointer-events: none; }
.pool-tile.wrong-reveal { border-color: var(--rd); color: var(--rd); opacity: 0.4; pointer-events: none; }

/* BREAKDOWN */
#breakdown { display: none; flex-direction: column; flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding-top: 2px; }
#breakdown.show { display: flex; }
.bd-title { font-family: var(--mono); font-size: 0.55rem; letter-spacing: 3px; color: var(--dim); text-transform: uppercase; padding: 10px 14px 6px; }
.morpheme-row { display: flex; flex-wrap: wrap; gap: 5px; padding: 0 12px 10px; align-items: center; }
.morpheme-card { display: flex; flex-direction: column; align-items: center; background: var(--pnl); border: 1px solid var(--bdr); border-radius: 8px; padding: 7px 11px; gap: 3px; min-width: 52px; }
.morpheme-card .m-chunk { font-size: 1.05rem; font-weight: 900; font-family: var(--jp); color: var(--txt); }
.morpheme-card .m-gloss { font-family: var(--mono); font-size: 0.5rem; color: var(--cy); letter-spacing: 1px; text-align: center; line-height: 1.3; }
.morpheme-connector { align-self: center; color: var(--dim); font-size: 0.85rem; font-family: var(--mono); flex-shrink: 0; }
.bd-answer { margin: 0 12px; padding: 10px 14px; background: rgba(61,255,170,.05); border: 1px solid rgba(61,255,170,.2); border-radius: 8px; font-family: var(--mono); font-size: 0.85rem; color: var(--gr); font-weight: 700; letter-spacing: 1px; }
.bd-answer .ja-ans { font-family: var(--jp); font-size: 1.1rem; display: block; margin-top: 4px; color: var(--mg); }
.bd-note { margin: 7px 12px 0; padding: 8px 12px; background: rgba(255,154,61,.05); border: 1px solid rgba(255,154,61,.18); border-radius: 8px; font-family: var(--mono); font-size: 0.6rem; color: var(--or); line-height: 1.6; letter-spacing: 0.5px; }
.bd-note strong { color: var(--yl); }
.bd-packaging { margin: 6px 12px 0; padding: 8px 12px; background: rgba(164,140,255,.05); border: 1px solid rgba(164,140,255,.15); border-radius: 8px; font-family: var(--mono); font-size: 0.6rem; color: #a48cff; line-height: 1.6; letter-spacing: 0.5px; }
.bd-next { margin: auto 12px 12px; width: calc(100% - 24px); padding: 13px; background: var(--gr); color: #000; font-family: var(--mono); font-size: 0.85rem; font-weight: 700; letter-spacing: 3px; border: none; border-radius: 8px; cursor: pointer; transition: 0.1s; }
.bd-next:hover { background: #5fffbf; }
.bd-next.en-ja-mode { background: var(--mg); color: #000; }
.bd-next.en-ja-mode:hover { background: #ff70e8; }

/* OVERLAY SCREENS */
.overlay-screen {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; flex-direction: column; align-items: center;
  justify-content: flex-start;
  /* padding-top: centers content when it fits, collapses on small screens */
  padding: clamp(16px, calc(50dvh - 260px), 80px) 20px 32px;
  gap: 0; z-index: 100;
  overflow-y: auto; -webkit-overflow-scrolling: touch;
}
.overlay-screen.hidden { display: none; }
.ov-title { font-size: clamp(2rem, 8vw, 3rem); font-weight: 900; font-family: var(--jp); color: var(--txt); margin-bottom: 2px; line-height: 1; }
.ov-title .accent { color: var(--cy); }
.ov-sub { font-family: var(--mono); font-size: 0.58rem; color: var(--dim); letter-spacing: 4px; text-transform: uppercase; margin-bottom: 20px; }
.ov-block { width: 100%; max-width: 400px; margin-bottom: 12px; }
.ov-label { font-family: var(--mono); font-size: 0.52rem; color: var(--dim); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 6px; display: block; }
.pill-row { display: flex; gap: 5px; flex-wrap: wrap; }
.pill {
  flex: 1; padding: 7px 8px; background: #000; border: 1px solid var(--bdr);
  color: var(--dim); font-family: var(--mono); font-size: 0.62rem;
  cursor: pointer; border-radius: 6px; letter-spacing: 1px; transition: 0.12s;
  text-align: center; min-width: 60px; line-height: 1.3;
}
.pill:hover { border-color: #444; color: #999; }
.pill.on.d-easy { border-color: var(--gr); color: var(--gr); background: rgba(61,255,170,.07); }
.pill.on.d-normal { border-color: var(--cy); color: var(--cy); background: rgba(0,245,255,.07); }
.pill.on.d-hard { border-color: var(--rd); color: var(--rd); background: rgba(255,56,96,.07); }
.pill.on.dir { border-color: var(--mg); color: var(--mg); background: rgba(255,43,214,.07); }
.pill.on.cat { border-color: #a48cff; color: #a48cff; background: rgba(164,140,255,.07); }
.ov-start {
  width: 100%; max-width: 400px; padding: 14px; background: var(--cy); color: #000;
  font-family: var(--mono); font-size: 0.9rem; font-weight: 700; letter-spacing: 3px;
  border: none; border-radius: 8px; cursor: pointer; transition: 0.1s; margin-top: 4px;
}
.ov-start:hover { background: #33faff; }
.ov-start.en-ja { background: var(--mg); }
.ov-start.en-ja:hover { background: #ff70e8; }
.ov-back { font-family: var(--mono); font-size: 0.6rem; color: var(--dim); text-decoration: none; letter-spacing: 2px; margin-top: 12px; transition: color 0.1s; }
.ov-back:hover { color: var(--mg); }
.end-score { font-size: clamp(3.5rem, 14vw, 5rem); font-weight: 900; font-family: var(--mono); color: var(--cy); line-height: 1; }
.end-label { font-family: var(--mono); font-size: 0.55rem; letter-spacing: 3px; color: var(--dim); margin-bottom: 20px; }
.end-stats { display: flex; gap: 24px; margin-bottom: 22px; }
.end-stat { text-align: center; }
.end-stat .v { font-size: 1.5rem; font-weight: 700; color: var(--yl); font-family: var(--mono); display: block; }
.end-stat .l { font-size: 0.5rem; letter-spacing: 2px; color: var(--dim); font-family: var(--mono); }
.go-sec { width:100%;max-width:400px;padding:10px;background:none;border:1px solid var(--bdr);color:var(--dim);font-family:var(--mono);font-size:.62rem;letter-spacing:2px;border-radius:8px;cursor:pointer;margin-top:8px;transition:.1s; }
.go-sec:hover { color: var(--rd); border-color: var(--rd); }

/* ── IN-GAME SETTINGS ── */

.hdr-settings:hover { color: var(--cy); border-color: var(--cy); }



.settings-title {
  font-family: var(--mono); font-size: 0.7rem;
  color: var(--cy); letter-spacing: 2px;
}


/* ── DETAIL PANEL (in breakdown) ── */
.bd-detail { margin: 6px 12px 0; }
.bd-detail-toggle {
  width: 100%; padding: 7px 12px; background: none;
  border: 1px dashed var(--bdr); color: var(--dim);
  font-family: var(--mono); font-size: 0.52rem; letter-spacing: 2px;
  border-radius: 6px; cursor: pointer; text-align: left; transition: 0.1s;
}
.bd-detail-toggle:hover { border-color: var(--cy); color: var(--cy); }
.bd-detail-toggle.open { border-color: var(--cy); color: var(--cy); border-style: solid; }
.bd-detail-body { display: none; margin-top: 6px; }
.bd-detail-body.open { display: block; }
.bd-detail-section {
  margin-bottom: 5px; padding: 8px 12px;
  background: var(--bg); border: 1px solid var(--bdr); border-radius: 8px;
}
.bd-detail-label {
  font-family: var(--mono); font-size: 0.48rem; color: var(--dim);
  letter-spacing: 3px; text-transform: uppercase; margin-bottom: 5px;
}
.bd-meaning-path { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.bd-mstep { font-family: var(--mono); font-size: 0.62rem; color: var(--txt); }
.bd-mstep.final { color: var(--cy); font-weight: 700; }
.bd-marrow { color: var(--dim); font-size: 0.7rem; }
.bd-variant { font-family: var(--mono); font-size: 0.62rem; color: var(--txt); padding: 3px 0; border-bottom: 1px solid var(--bdr); }
.bd-variant:last-child { border-bottom: none; }
.bd-variant .var-tag { font-size: 0.44rem; color: var(--dim); letter-spacing: 1px; margin-right: 6px; }
.bd-variant.primary { color: var(--gr); }
/* ── MA-LITE (in breakdown) ── */
.bd-malite-q { font-family: var(--mono); font-size: 0.58rem; color: var(--yl); margin-bottom: 7px; line-height: 1.5; }
.bd-malite-opts { display: flex; flex-wrap: wrap; gap: 5px; }
.bd-malite-btn {
  padding: 5px 10px; background: none; border: 1px solid var(--bdr);
  color: var(--txt); font-family: var(--mono); font-size: 0.58rem;
  border-radius: 6px; cursor: pointer; transition: 0.1s;
}
.bd-malite-btn:hover { border-color: var(--yl); color: var(--yl); }
.bd-malite-btn.ruled-out { border-color: var(--rd); color: var(--rd); opacity: 0.4; text-decoration: line-through; pointer-events: none; }
.bd-malite-result { margin-top: 7px; font-family: var(--mono); font-size: 0.6rem; color: var(--gr); display: none; }
.bd-malite-result.show { display: block; }
.bd-malite-reset { margin-top: 5px; padding: 2px 7px; background: none; border: 1px solid var(--bdr); color: var(--dim); font-family: var(--mono); font-size: 0.48rem; border-radius: 4px; cursor: pointer; }
.bd-malite-reset:hover { color: var(--cy); border-color: var(--cy); }
/* EXPLORE link */
.explore-link {
  font-family: var(--mono); font-size: 0.6rem; color: var(--mg);
  text-decoration: none; letter-spacing: 1px; transition: color 0.1s; white-space: nowrap;
  border: 1px solid rgba(255,43,214,.3); border-radius: 4px; padding: 3px 8px;
}
.explore-link:hover { color: #ff70e8; border-color: var(--mg); }

/* ── NEAR MISS (amber / meaning-correct) ── */
.prog-dot.near-done { background: var(--yl); }
.bd-nearmiss {
  margin: 6px 12px 0; padding: 8px 12px;
  background: rgba(255,216,61,.06); border: 1px solid rgba(255,216,61,.25);
  border-radius: 8px; font-family: var(--mono); font-size: 0.6rem;
  color: var(--yl); line-height: 1.6; letter-spacing: 0.5px;
}
.bd-nearmiss strong { color: #fff; margin-right: 6px; }

/* ── MOBILE TOUCH TARGETS + LAYOUT ── */
@media (max-width: 520px) {
  /* Bigger pool tiles — easier to tap accurately */
  .pool-tile { padding: 12px 18px; font-size: 1rem; min-height: 44px; display: flex; align-items: center; }
  .pool-tile.ja { font-size: 1.4rem; padding: 10px 14px; }

  /* Bigger assembled tiles */
  .asm-tile { padding: 11px 18px; font-size: 1.05rem; min-height: 44px; }
  .asm-tile.ja { font-size: 1.5rem; }

  /* Bigger action buttons — 44px minimum tap target (Apple HIG) */
  .act-btn { padding: 12px 14px; font-size: 0.72rem; min-height: 44px; }
  .act-btn.primary { padding: 14px 12px; font-size: 0.9rem; }

  /* Taller assembly zone */
  #assembly-zone { min-height: 84px; padding: 12px; }

  /* Start screen: pill buttons easier to tap */
  .pill { min-height: 44px; padding: 10px 8px; font-size: 0.68rem; }

  /* Slightly larger source text on small screens */
  .source-ja.mode-ja-en { font-size: clamp(2rem, 7vw, 2.8rem); }

  /* Ensure tile pool fills remaining space and scrolls cleanly */
  #tile-pool { gap: 10px; padding: 12px; }

  /* Header: shrink brand text to save space */
  .brand { font-size: 0.58rem; }
  .back-link, .explore-link { font-size: 0.55rem; }
  .dir-btn { font-size: 0.58rem; padding: 5px 8px; }
}

/* Very small screens (iPhone SE 1st gen, 320px wide) */
@media (max-width: 360px) {
  .pool-tile { padding: 10px 12px; font-size: 0.92rem; }
  #tile-pool { gap: 7px; }
}