/* ===================================================
   記憶の断片 — style.css  v1.0.0
   Aesthetic: Dark Crystalline / Deep Space Memory
   =================================================== */

@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;600;700&family=Noto+Sans+JP:wght@400;700&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --clr-bg:        #060a14;
  --clr-surface:   #0d1525;
  --clr-surface2:  #111d35;
  --clr-border:    rgba(100,180,255,0.15);
  --clr-border2:   rgba(100,180,255,0.30);
  --clr-accent:    #38c4ff;
  --clr-accent2:   #7b5cf5;
  --clr-gold:      #f5c842;
  --clr-green:     #34e0a1;
  --clr-text:      #cde4f8;
  --clr-text-dim:  #5a7a99;
  --clr-empty:     rgba(6,10,20,0.6);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --piece-gap: 3px;
  --transition-piece: 0.18s cubic-bezier(0.4,0,0.2,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* ============================================================
   SCREENS
   ============================================================ */
.screen {
  position: fixed; inset: 0;
  display: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.screen.active {
  display: flex;
  opacity: 1;
}

/* ============================================================
   TITLE SCREEN
   ============================================================ */
#screen-title {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  overflow-x: hidden;
}

.title-bg {
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(56,196,255,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(123,92,245,0.10) 0%, transparent 60%),
    var(--clr-bg);
}
/* Animated grain */
.title-bg::after {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  opacity: 0.4;
  pointer-events: none;
}

.title-content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  align-items: center; gap: 1.2rem;
  padding: 3rem 1.5rem;
  text-align: center;
}

.title-eyebrow {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.4em;
  color: var(--clr-accent);
  opacity: 0.8;
}

.title-main {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(2.8rem, 8vw, 5rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  text-shadow:
    0 0 30px rgba(56,196,255,0.5),
    0 0 80px rgba(56,196,255,0.2);
  line-height: 1;
}

.title-sub {
  font-size: 0.95rem;
  color: var(--clr-text-dim);
  letter-spacing: 0.2em;
}

/* Difficulty select */
.difficulty-select { width: 100%; max-width: 420px; }

.select-label {
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--clr-text-dim);
  margin-bottom: 0.7rem;
}

.diff-buttons {
  display: flex; gap: 0.6rem;
}

.diff-btn {
  flex: 1;
  display: flex; flex-direction: column; align-items: center;
  gap: 0.25rem;
  padding: 0.9rem 0.5rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  color: var(--clr-text);
}
.diff-btn:hover {
  border-color: var(--clr-border2);
  background: var(--clr-surface2);
}
.diff-btn.active {
  border-color: var(--clr-accent);
  background: rgba(56,196,255,0.08);
  box-shadow: 0 0 16px rgba(56,196,255,0.15);
}

.diff-name {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.diff-btn[data-diff="easy"]   .diff-name { color: var(--clr-green); }
.diff-btn[data-diff="normal"] .diff-name { color: var(--clr-accent); }
.diff-btn[data-diff="hard"]   .diff-name { color: #ff6b6b; }

.diff-desc {
  font-size: 0.7rem;
  color: var(--clr-text-dim);
}

.title-score-preview {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  min-height: 1.2rem;
}

/* ============================================================
   GAME SCREEN
   ============================================================ */
#screen-game {
  flex-direction: column;
  height: 100dvh;
}

/* HUD */
#hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  flex-shrink: 0;
  height: 52px;
}

.hud-item {
  display: flex; align-items: center; gap: 0.4rem;
  min-width: 80px;
}
.hud-item:last-child { justify-content: flex-end; }

.hud-label { font-size: 1rem; }
.hud-value {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--clr-accent);
  letter-spacing: 0.05em;
  min-width: 3.5ch;
}

.hud-center { text-align: center; }
.diff-badge {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 0.2rem 0.7rem;
  border-radius: 100px;
  background: rgba(56,196,255,0.12);
  border: 1px solid rgba(56,196,255,0.3);
  color: var(--clr-accent);
}
.diff-badge.easy   { background: rgba(52,224,161,0.12); border-color: rgba(52,224,161,0.3); color: var(--clr-green); }
.diff-badge.hard   { background: rgba(255,107,107,0.12); border-color: rgba(255,107,107,0.3); color: #ff6b6b; }

/* Main game layout */
#game-main {
  display: flex;
  flex: 1;
  overflow: hidden;
  gap: 0;
}

/* Puzzle area */
#puzzle-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  min-width: 0;
}

#puzzle-board {
  aspect-ratio: 1 / 1;
  width: min(
    calc(100dvh - 52px - 2rem),
    calc(100% - 0px)
  );
  max-width: 520px;
  display: grid;
  gap: var(--piece-gap);
  /* grid-template-columns set by JS */
  background: var(--clr-surface);
  border: 1px solid var(--clr-border2);
  border-radius: var(--radius-md);
  padding: var(--piece-gap);
  box-shadow:
    0 0 0 1px rgba(56,196,255,0.05),
    0 20px 60px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.04);
  position: relative;
  overflow: hidden;
}

/* Piece */
.piece {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-sm);
  background-size: cover;
  background-repeat: no-repeat;
  cursor: pointer;
  transition:
    transform var(--transition-piece),
    box-shadow var(--transition-piece),
    filter var(--transition-piece);
  border: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}
.piece:hover:not(.empty) {
  transform: scale(0.96);
  z-index: 2;
  box-shadow: 0 0 0 2px var(--clr-accent);
}
.piece.empty {
  background:
    repeating-conic-gradient(
      rgba(255,255,255,0.12) 0% 25%,
      rgba(0,0,0,0.0) 0% 50%
    ) 0 0 / 12px 12px,
    var(--clr-empty) !important;
  cursor: default;
  border: 2px dashed rgba(255,255,255,0.12) !important;
}
.piece.slide-anim {
  transition: transform 0.15s cubic-bezier(0.4,0,0.2,1);
}

/* Piece number overlay (optional debug) */
/* .piece::after { content: attr(data-idx); position:absolute; ... } */

/* Side panel */
#side-panel {
  width: 160px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 1rem 0.8rem 1rem 0;
  overflow-y: auto;
}

.panel-section { display: flex; flex-direction: column; gap: 0.5rem; }

.panel-label {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--clr-text-dim);
  text-transform: uppercase;
}

#preview-canvas {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
  display: block;
  background: var(--clr-surface);
}


/* ── Side panel: left column (desktop) ── */
.panel-left {
  gap: 0.4rem;
}
.panel-left-footer {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.3rem;
}
.panel-left-footer .upload-btn {
  flex: 1;
  font-size: 0.75rem;
}
/* デスクトップ: ⚙を右端に */
.panel-left-footer .btn-panel-gear {
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center; justify-content: center;
  padding: 0.85rem 2.2rem;
  background: var(--clr-accent);
  color: var(--clr-bg);
  border: none;
  border-radius: var(--radius-md);
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 0 24px rgba(56,196,255,0.35);
}
.btn-primary:hover {
  background: #5dd3ff;
  box-shadow: 0 0 36px rgba(56,196,255,0.5);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 100%;
  padding: 0.6rem 0.8rem;
  background: var(--clr-surface2);
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.18s;
  gap: 0.3rem;
}
.btn-secondary:hover {
  border-color: var(--clr-border2);
  background: rgba(56,196,255,0.06);
  color: var(--clr-accent);
}

.btn-ghost {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 100%;
  padding: 0.5rem 0.8rem;
  background: transparent;
  color: var(--clr-text-dim);
  border: 1px solid rgba(90,122,153,0.3);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.18s;
}
.btn-ghost:hover { color: var(--clr-text); border-color: var(--clr-border2); }

/* サイドパネル内の btn-ghost はボタン群と背景色・文字色を統一 */
#side-panel .btn-ghost {
  background: var(--clr-surface2);
  border-color: var(--clr-border);
  color: var(--clr-text);
}
#side-panel .btn-ghost:hover {
  border-color: var(--clr-border2);
  background: rgba(56,196,255,0.06);
  color: var(--clr-text);
}

.upload-btn {
  display: flex;
  align-items: center; justify-content: center;
  width: 100%;
  padding: 0.6rem 0.5rem;
  background: var(--clr-surface2);
  color: var(--clr-text);
  border: 1px dashed var(--clr-border2);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.18s;
  text-align: center;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.upload-btn:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: rgba(56,196,255,0.05);
}
.upload-btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-group-vertical {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ============================================================
   HINT OVERLAY
   ============================================================ */
#hint-overlay {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 100;
}
#hint-overlay.active {
  pointer-events: none;
}

.hint-piece-glow {
  position: fixed;
  border-radius: var(--radius-sm);
  background: rgba(56,196,255,0.22);
  border: 3px solid var(--clr-accent);
  box-shadow:
    0 0 16px rgba(56,196,255,0.7),
    inset 0 0 12px rgba(56,196,255,0.15);
  animation: hintPulse 0.5s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes hintPulse {
  from { opacity: 0.6; box-shadow: 0 0 12px rgba(56,196,255,0.5); }
  to   { opacity: 1;   box-shadow: 0 0 28px rgba(56,196,255,0.9); }
}

.hint-arrow {
  position: fixed;
  font-size: 2rem;
  color: #fff;
  text-shadow:
    0 0 10px var(--clr-accent),
    0 0 24px var(--clr-accent);
  pointer-events: none;
  z-index: 101;
  animation: hintPulse 0.5s ease-in-out infinite alternate;
  line-height: 1;
}

/* ============================================================
   MODALS
   ============================================================ */
.modal {
  position: fixed; inset: 0;
  background: rgba(6,10,20,0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}
.modal.hidden { display: none; }

.modal-box {
  position: relative;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border2);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  max-width: 360px;
  width: 100%;
  text-align: center;
  box-shadow:
    0 0 0 1px rgba(56,196,255,0.08),
    0 30px 80px rgba(0,0,0,0.7);
  overflow: hidden;
}

.modal-fireworks {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
#fireworks-canvas { width: 100%; height: 100%; }

.modal-emoji { font-size: 3rem; position: relative; z-index: 1; }
.modal-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  text-shadow: 0 0 20px rgba(56,196,255,0.4);
  margin: 0.3rem 0 1rem;
  position: relative; z-index: 1;
}

.modal-stats {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
  position: relative; z-index: 1;
}
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.8rem;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm);
}
.stat-label { font-size: 0.82rem; color: var(--clr-text-dim); }
.stat-value {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--clr-text);
}
.stat-value.highlight { color: var(--clr-gold); font-size: 1.5rem; }

.score-row {
  background: rgba(245,200,66,0.06);
  border: 1px solid rgba(245,200,66,0.15);
}

.new-record {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--clr-gold);
  text-shadow: 0 0 16px rgba(245,200,66,0.5);
  margin-bottom: 0.8rem;
  position: relative; z-index: 1;
  animation: recordPulse 1s ease-in-out infinite alternate;
}
@keyframes recordPulse {
  from { opacity: 0.7; }
  to   { opacity: 1; text-shadow: 0 0 28px rgba(245,200,66,0.8); }
}
.new-record.hidden { display: none; }

.modal-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  position: relative; z-index: 1;
  width: 100%;
}
.modal-buttons button {
  flex: 1 1 auto;
  min-width: 5rem;
  max-width: 10rem;
  white-space: nowrap;
  padding: 0.65rem 0.8rem;
  font-size: 0.88rem;
}

/* Ranking — クリア/ゲームオーバーモーダルより前面に */
#modal-ranking { z-index: 210; }
.ranking-box { max-width: 400px; }
.rank-tabs {
  display: flex; gap: 0.4rem;
  margin: 0.8rem 0;
}
.rank-tab {
  flex: 1;
  padding: 0.4rem;
  background: var(--clr-surface2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-dim);
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.18s;
}
.rank-tab.active {
  border-color: var(--clr-accent);
  background: rgba(56,196,255,0.1);
  color: var(--clr-accent);
}

#ranking-list {
  display: flex; flex-direction: column; gap: 0.35rem;
  max-height: 300px;
  overflow-y: auto;
}
.rank-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.7rem;
  background: var(--clr-surface2);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}
.rank-pos {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  min-width: 1.8rem;
  color: var(--clr-text-dim);
}
.rank-pos.gold   { color: #f5c842; }
.rank-pos.silver { color: #c0c0c0; }
.rank-pos.bronze { color: #cd7f32; }
.rank-score {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-accent);
  margin-left: auto;
}
.rank-detail {
  font-size: 0.7rem;
  color: var(--clr-text-dim);
}
.rank-empty {
  text-align: center;
  color: var(--clr-text-dim);
  font-size: 0.82rem;
  padding: 1rem;
}

/* ============================================================
   RESPONSIVE — Tablet
   ============================================================ */
@media (max-width: 680px) {
  /* ── ゲームエリア縦並び ── */
  #game-main {
    flex-direction: column;
  }

  /* ── パズルエリア: flex:none でボードサイズに追従 ── */
  #puzzle-wrap {
    flex: none;
    width: 100%;
    padding: 0.5rem;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  #puzzle-board {
    width: 100%;                                         /* wrap幅いっぱい */
    max-width: calc(100dvh - 52px - 150px - 1rem);      /* 縦幅ガード */
    /* aspect-ratio: 1/1 はデスクトップから継承 → wrapの高さも自動決定 */
  }

  /* ── サイドパネル全体 ── */
  #side-panel {
    width: 100%;
    flex-direction: row;
    align-items: stretch;
    padding: 0.5rem 0.6rem;
    gap: 0.6rem;
    border-top: 1px solid var(--clr-border);
    overflow-y: visible;
    flex-shrink: 0;
    height: 150px;
    box-sizing: border-box;
  }

  /* 左列: プレビュー（上）+ 画像選択（下） */
  .panel-left {
    flex-direction: column;
    align-items: stretch;
    justify-content: space-between;
    flex-shrink: 0;
    width: 110px;
    padding: 0;
    gap: 0.3rem;
  }

  .panel-label { display: none; }

  /* プレビューを正方形で */
  #preview-canvas {
    width: 100%;
    aspect-ratio: 1 / 1;
    flex: 1;
    height: 0;
  }

  /* 画像選択: プレビュー下 */
  .panel-left-footer {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.3rem;
    flex-shrink: 0;
  }
  .panel-left-footer .upload-btn {
    flex: 1;
    font-size: 0.65rem;
    padding: 0.3rem 0.2rem;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* ⚙: モバイルでは panel-left-footer 右端に配置 */
  .panel-left-footer .btn-panel-gear {
    font-size: 1rem;
    padding: 0.2rem 0.3rem;
    flex-shrink: 0;
  }

  /* 右列: ボタン 2×2 グリッド */
  .btn-group-vertical {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 0.45rem;
    align-items: stretch;
  }
  .btn-group-vertical .btn-secondary,
  .btn-group-vertical .btn-ghost {
    width: 100%;
    height: 100%;
    font-size: 0.82rem;
    padding: 0.3rem;
    white-space: nowrap;
  }
}

@media (max-width: 360px) {
  #hud { padding: 0.4rem 0.6rem; height: 46px; }
  .hud-value { font-size: 1.2rem; }
}

/* ============================================================
   UTILITIES
   ============================================================ */
.hidden { display: none !important; }

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(56,196,255,0.2); border-radius: 2px; }

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ============================================================
   CLEAR IMAGE OVERLAY  (v1.1.0)
   ============================================================ */
#clear-overlay {
  position: fixed; inset: 0;
  z-index: 150;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(6,10,20,0.0);
  cursor: pointer;
  transition: background 0.6s ease;
}
#clear-overlay.visible {
  background: rgba(6,10,20,0.55);
}
#clear-overlay.hidden { display: none; }

#clear-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}
#clear-overlay.visible #clear-canvas { opacity: 1; }

#clear-overlay-text {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease 0.4s, transform 0.5s ease 0.4s;
  pointer-events: none;
}
#clear-overlay.visible #clear-overlay-text {
  opacity: 1;
  transform: translateY(0);
}

.clear-overlay-label {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(1.8rem, 6vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: #fff;
  text-shadow:
    0 0 20px rgba(56,196,255,0.8),
    0 0 50px rgba(56,196,255,0.4);
}
.clear-overlay-sub {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.2em;
  animation: subtleBlink 2s ease-in-out infinite;
}
@keyframes subtleBlink {
  0%, 100% { opacity: 0.55; }
  50%       { opacity: 0.2; }
}

/* Piece clear animation */
.piece.clear-flash {
  animation: clearFlash 0.6s ease forwards;
}
@keyframes clearFlash {
  0%   { filter: brightness(1); }
  40%  { filter: brightness(2.5) saturate(1.5); }
  100% { filter: brightness(1.2); }
}

/* ============================================================
   TIME ATTACK MODE  (v1.2.0)
   ============================================================ */

/* Mode select on title */
.mode-select { width: 100%; max-width: 420px; }

.mode-buttons {
  display: flex; gap: 0.6rem;
}

.mode-btn {
  flex: 1;
  display: flex; flex-direction: column; align-items: center;
  gap: 0.2rem;
  padding: 0.8rem 0.5rem;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  color: var(--clr-text);
}
.mode-btn:hover {
  border-color: var(--clr-border2);
  background: var(--clr-surface2);
}
.mode-btn.active {
  border-color: var(--clr-gold);
  background: rgba(245,200,66,0.07);
  box-shadow: 0 0 16px rgba(245,200,66,0.12);
}
.mode-icon { font-size: 1.3rem; }
.mode-name {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--clr-text);
}
.mode-btn.active .mode-name { color: var(--clr-gold); }
.mode-desc {
  font-size: 0.65rem;
  color: var(--clr-text-dim);
}

/* Mode badge in HUD */
.mode-badge {
  display: inline-block;
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.1rem 0.5rem;
  border-radius: 100px;
  background: rgba(245,200,66,0.15);
  border: 1px solid rgba(245,200,66,0.4);
  color: var(--clr-gold);
  margin-top: 0.15rem;
}
.mode-badge.hidden { display: none !important; }

/* Time bar */
#time-bar-wrap {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.06);
  flex-shrink: 0;
  overflow: hidden;
}
#time-bar-wrap.hidden { display: none; }
#time-bar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent2));
  transform-origin: left;
  transition: width 1s linear, background 0.5s ease;
}
#time-bar.warning {
  background: linear-gradient(90deg, #ff6b6b, #ff9f43);
  animation: barPulse 0.5s ease-in-out infinite alternate;
}
@keyframes barPulse {
  from { opacity: 0.7; }
  to   { opacity: 1; }
}

/* HUD timer warning */
#hud-timer.warning {
  color: #ff6b6b;
  animation: timerPulse 0.5s ease-in-out infinite alternate;
}
@keyframes timerPulse {
  from { opacity: 0.6; }
  to   { opacity: 1; }
}

/* Game over modal */
.gameover-box {
  border-color: rgba(255,107,107,0.4);
  box-shadow:
    0 0 0 1px rgba(255,107,107,0.08),
    0 30px 80px rgba(0,0,0,0.7);
}
.gameover-title { color: #ff6b6b; text-shadow: 0 0 20px rgba(255,107,107,0.5); }
.gameover-sub {
  font-size: 0.85rem;
  color: var(--clr-text-dim);
  margin: -0.5rem 0 1rem;
  position: relative; z-index: 1;
}

/* HUD time limit display */
#hud-timelimit {
  font-size: 0.65rem;
  color: var(--clr-text-dim);
  letter-spacing: 0.05em;
}

/* Ranking mode tabs */
.rank-mode-tabs {
  display: flex; gap: 0.4rem;
  margin-bottom: 0.4rem;
}
.rank-mode-btn {
  flex: 1;
  padding: 0.35rem;
  background: var(--clr-surface2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-dim);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.18s;
}
.rank-mode-btn.active {
  border-color: var(--clr-gold);
  background: rgba(245,200,66,0.1);
  color: var(--clr-gold);
}

/* ============================================================
   HUD score display  (v1.2.4)
   ============================================================ */
.hud-item--right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem;
  min-width: 120px;
}
.hud-sep {
  color: var(--clr-border2);
  font-size: 0.9rem;
}
.hud-score {
  color: var(--clr-gold);
  min-width: 5ch;
  text-align: right;
}

/* ============================================================
   PLAYER NAME / SETTINGS  (v1.3.0)
   ============================================================ */

/* タイトル画面のネームプレート */
.player-nameplate {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(56,196,255,0.07);
  border: 1px solid rgba(56,196,255,0.25);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.8rem;
  width: 100%;
  max-width: 420px;
  justify-content: center;
}
.nameplate-label {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--clr-text-dim);
}
.nameplate-value {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-accent);
  letter-spacing: 0.1em;
  flex: 1;
  text-align: center;
}
.btn-settings {
  background: none;
  border: none;
  color: var(--clr-text-dim);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  transition: color 0.2s;
  line-height: 1;
}
.btn-settings:hover { color: var(--clr-accent); }

/* セットアップ・設定オーバーレイ */
.overlay-modal {
  position: fixed; inset: 0;
  z-index: 200;
  background: rgba(6,10,20,0.92);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.overlay-modal.hidden { display: none; }

.overlay-box {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border2);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  max-width: min(460px, 90vw);
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}

.overlay-title {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.overlay-title-main {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--clr-text);
  text-shadow: 0 0 20px rgba(56,196,255,0.4);
}
.overlay-title-sub {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  letter-spacing: 0.2em;
}

.settings-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--clr-text);
}

/* 名前入力フォーム */
.setup-section {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
  width: 100%;
}
.setup-label {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--clr-text-dim);
  align-self: flex-start;
}
.name-input {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(56,196,255,0.35);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  color: var(--clr-text);
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}
.name-input::placeholder { color: var(--clr-text-dim); }
.name-input:focus {
  border-color: var(--clr-accent);
  box-shadow: 0 0 10px rgba(56,196,255,0.25);
}
.name-hint {
  font-size: 0.65rem;
  color: var(--clr-text-dim);
  letter-spacing: 0.03em;
  line-height: 1.5;
}
.name-error {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.7rem;
  color: #ff6b6b;
  letter-spacing: 0.05em;
  min-height: 1.2em;
}

.settings-buttons {
  display: flex;
  gap: 0.6rem;
  width: 100%;
}
.btn-large {
  padding: 0.7rem 1.2rem;
  font-size: 0.9rem;
  width: 100%;
}

/* ランキング行の名前 */
.rank-name {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: 0.05em;
}

/* ランキングモーダルに名前列を追加した際の行スタイル調整 */
.rank-row {
  grid-template-columns: 2rem 1fr auto;
}

/* ============================================================
   TITLE SCREEN — image upload link  (v1.3.7)
   ============================================================ */
.title-upload-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--clr-text-dim);
  cursor: pointer;
  transition: color 0.18s;
  letter-spacing: 0.03em;
  border-bottom: 1px dashed transparent;
  padding-bottom: 1px;
}
.title-upload-link:hover {
  color: var(--clr-accent);
  border-bottom-color: var(--clr-accent);
}
#title-upload-name {
  color: var(--clr-accent);
  font-size: 0.72rem;
  max-width: 12ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================================
   PIECE NUMBER OVERLAY  (v1.3.8)
   ============================================================ */
.piece-number {
  position: absolute;
  right: 4px;
  bottom: 3px;
  font-size: clamp(0.75rem, 2.2vw, 1.1rem);
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  color: #fff;
  text-shadow:
    0 0 4px rgba(0,0,0,1),
    0 1px 3px rgba(0,0,0,0.9),
    -1px -1px 0 rgba(0,0,0,0.8);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: 0;
}

/* トグルON状態 */
#btn-number.active {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: rgba(56,196,255,0.1);
}

/* ============================================================
   PAUSE OVERLAY  (v1.4.1)
   ============================================================ */
.pause-box {
  gap: 1.4rem;
}
.pause-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--clr-text);
}
.pause-sub {
  font-size: 0.85rem;
  color: var(--clr-text-dim);
  letter-spacing: 0.05em;
  margin: 0;
}
.pause-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  width: 100%;
}

/* ============================================================
   TITLE SCREEN — ranking button  (v1.4.3)
   ============================================================ */
.title-ranking-btn {
  width: auto;
  padding: 0.5rem 1.8rem;
  font-size: 0.85rem;
}

/* ============================================================
   TITLE SCREEN — restructured layout  (v1.4.4)
   ============================================================ */

/* セクション間の区切り */
.title-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.title-settings {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
}

.title-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
}

/* 画像選択とランキングを横並び */
.title-sub-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
}

/* ランキングリンク（画像選択と同スタイルで統一） */
.title-ranking-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--clr-text-dim);
  cursor: pointer;
  background: transparent;
  border: none;
  border-bottom: 1px dashed transparent;
  padding-bottom: 1px;
  transition: color 0.18s, border-color 0.18s;
  letter-spacing: 0.03em;
  font-family: inherit;
}
.title-ranking-link:hover {
  color: var(--clr-accent);
  border-bottom-color: var(--clr-accent);
}

/* 旧スタイルを上書き */
.title-ranking-btn {
  all: unset;
}

/* ============================================================
   SIDE PANEL — gear button next to preview label  (v1.4.5)
   ============================================================ */
.panel-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-bottom: 0.4rem;
}
.panel-label-row .panel-label {
  margin: 0;
}
.btn-panel-gear {
  background: transparent;
  border: none;
  color: var(--clr-text-dim);
  font-size: 1.2rem;        /* デスクトップ: 視認しやすいサイズ */
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color 0.18s, background 0.18s;
  line-height: 1;
}
.btn-panel-gear:hover {
  color: var(--clr-accent);
  background: rgba(56,196,255,0.08);
}

/* ============================================================
   SETTINGS — slide toggle switch  (v1.4.6b)
   ============================================================ */
.sound-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sound-row .setup-label {
  margin: 0;
}
.slide-toggle {
  position: relative;
  cursor: pointer;
  user-select: none;
}
.slide-toggle input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.slide-track {
  display: flex;
  align-items: center;
  width: 90px;
  height: 36px;
  border-radius: 4px;
  background: #2a2a2a;
  border: 1px solid #444;
  position: relative;
  overflow: hidden;
  transition: background 0.2s;
}
.slide-thumb {
  position: absolute;
  width: 45px;
  height: 100%;
  border-radius: 3px;
  background: #4caf50;
  left: 0;
  transition: left 0.2s ease, background 0.2s;
  z-index: 1;
}
.slide-toggle input:not(:checked) ~ .slide-track .slide-thumb {
  left: 45px;
  background: #555;
}
.slide-label-on,
.slide-label-off {
  position: absolute;
  width: 45px;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 700;
  z-index: 2;
  pointer-events: none;
  transition: color 0.2s;
}
.slide-label-on  { left: 0;   color: #000; }
.slide-label-off { right: 0;  color: #aaa; }
.slide-toggle input:not(:checked) ~ .slide-track .slide-label-on  { color: #555; }
.slide-toggle input:not(:checked) ~ .slide-track .slide-label-off { color: #000; }