/* ==========================================================================
   15パズル DELUXE - スタイルシート
   ========================================================================== */

/* ---------- テーマ変数 ---------- */
:root,
[data-theme="classic"] {
  --bg-grad-1: #667eea;
  --bg-grad-2: #764ba2;
  --card-bg: rgba(255,255,255,0.96);
  --card-border: rgba(255,255,255,0.5);
  --text-main: #2d2d3a;
  --text-sub: #6b6b80;
  --accent: #6c5ce7;
  --accent-2: #a29bfe;
  --tile-bg-1: #6c5ce7;
  --tile-bg-2: #8e7cf5;
  --tile-text: #ffffff;
  --board-bg: #dcdcf5;
  --success: #00b894;
  --danger: #e74c3c;
  --shadow: 0 8px 30px rgba(60, 40, 120, 0.25);
}

[data-theme="neon"] {
  --bg-grad-1: #0f0c29;
  --bg-grad-2: #24243e;
  --card-bg: rgba(20, 18, 40, 0.92);
  --card-border: rgba(0, 255, 200, 0.35);
  --text-main: #e6faff;
  --text-sub: #8be9fd;
  --accent: #00ffc8;
  --accent-2: #ff00e5;
  --tile-bg-1: #00ffc8;
  --tile-bg-2: #ff00e5;
  --tile-text: #0f0c29;
  --board-bg: #1a1633;
  --success: #00ffc8;
  --danger: #ff5566;
  --shadow: 0 0 30px rgba(0,255,200,0.25);
}

[data-theme="pastel"] {
  --bg-grad-1: #ffecd2;
  --bg-grad-2: #fcb69f;
  --card-bg: rgba(255,255,255,0.95);
  --card-border: rgba(255,255,255,0.6);
  --text-main: #6d5a5a;
  --text-sub: #a9908f;
  --accent: #ff9a8b;
  --accent-2: #ffb6c1;
  --tile-bg-1: #ffb6c1;
  --tile-bg-2: #ffd3a5;
  --tile-text: #6d4c4c;
  --board-bg: #fff2ea;
  --success: #7bd389;
  --danger: #ff6f6f;
  --shadow: 0 8px 30px rgba(255,150,130,0.25);
}

[data-theme="midnight"] {
  --bg-grad-1: #0a0e27;
  --bg-grad-2: #1a1f3d;
  --card-bg: rgba(22, 26, 51, 0.94);
  --card-border: rgba(120, 130, 255, 0.25);
  --text-main: #dfe3f7;
  --text-sub: #8890b8;
  --accent: #5c7cfa;
  --accent-2: #7c5cfa;
  --tile-bg-1: #364070;
  --tile-bg-2: #5c7cfa;
  --tile-text: #eef0ff;
  --board-bg: #12162e;
  --success: #38d9a9;
  --danger: #ff6b6b;
  --shadow: 0 8px 30px rgba(0,0,20,0.5);
}

[data-theme="sakura"] {
  --bg-grad-1: #ffd1dc;
  --bg-grad-2: #ffb7c5;
  --card-bg: rgba(255,255,255,0.95);
  --card-border: rgba(255,255,255,0.6);
  --text-main: #5a3d4d;
  --text-sub: #a97b8f;
  --accent: #ff6f9c;
  --accent-2: #ffc2d1;
  --tile-bg-1: #ff85a2;
  --tile-bg-2: #ffc2d1;
  --tile-text: #5a2d3d;
  --board-bg: #fff0f4;
  --success: #6bcB77;
  --danger: #ff6f6f;
  --shadow: 0 8px 30px rgba(255,120,150,0.25);
}

[data-theme="retro"] {
  --bg-grad-1: #f7971e;
  --bg-grad-2: #ffd200;
  --card-bg: rgba(255, 250, 235, 0.96);
  --card-border: rgba(120, 80, 20, 0.25);
  --text-main: #4a3300;
  --text-sub: #8a6a2a;
  --accent: #d64545;
  --accent-2: #3aa6a6;
  --tile-bg-1: #d64545;
  --tile-bg-2: #3aa6a6;
  --tile-text: #fff8e8;
  --board-bg: #fff1cf;
  --success: #3aa66b;
  --danger: #d64545;
  --shadow: 0 8px 30px rgba(140,90,10,0.3);
}

/* ---------- リセット ---------- */
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  font-family: 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  background: linear-gradient(135deg, var(--bg-grad-1), var(--bg-grad-2));
  color: var(--text-main);
  min-height: 100vh;
  transition: background 0.5s ease;
  overflow-x: hidden;
}
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, p { margin: 0; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

/* ---------- レイアウト ---------- */
.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 20px;
  margin-bottom: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 200px; }
.brand-logo { font-size: 2.2rem; }
.brand-text h1 { font-size: 1.3rem; color: var(--text-main); }
.brand-text .deluxe { color: var(--accent); font-weight: 800; }
.tagline { font-size: 0.75rem; color: var(--text-sub); }

.level-badge {
  display: flex; flex-direction: column; gap: 3px;
  min-width: 160px;
}
.level-num { font-weight: 700; font-size: 0.9rem; color: var(--accent); }
.xp-bar { width: 100%; height: 8px; border-radius: 5px; background: var(--board-bg); overflow: hidden; }
.xp-bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); width: 0%; transition: width 0.4s ease; }
.xp-text { font-size: 0.65rem; color: var(--text-sub); }

.topnav { display: flex; gap: 8px; }
.nav-btn {
  width: 42px; height: 42px; border-radius: 12px; border: none;
  background: var(--board-bg); font-size: 1.2rem;
  transition: transform 0.15s ease, background 0.2s ease;
}
.nav-btn:hover { transform: translateY(-2px) scale(1.05); background: var(--accent-2); }

.main-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 16px;
  align-items: start;
}
@media (max-width: 860px) {
  .main-grid { grid-template-columns: 1fr; }
}

/* ---------- コントロールパネル ---------- */
.control-panel { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.panel-title { font-size: 1.05rem; }
.control-group label { display: block; font-size: 0.8rem; color: var(--text-sub); margin-bottom: 6px; font-weight: 600; }

.btn-row { display: flex; gap: 6px; flex-wrap: wrap; }
.opt-btn {
  flex: 1; min-width: 60px; padding: 9px 6px; border: 2px solid var(--board-bg);
  border-radius: 10px; background: transparent; color: var(--text-main);
  font-weight: 600; font-size: 0.85rem; transition: all 0.15s ease;
}
.opt-btn:hover { border-color: var(--accent-2); }
.opt-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.opt-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-main); cursor: pointer; }
.checkbox-row input { width: 16px; height: 16px; accent-color: var(--accent); }

.image-presets { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-bottom: 8px; }
.preset-thumb {
  aspect-ratio: 1; border-radius: 8px; border: 2px solid transparent;
  background-size: cover; background-position: center; overflow: hidden;
}
.preset-thumb.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-2); }

.upload-btn {
  display: block; text-align: center; padding: 9px; border-radius: 10px;
  border: 2px dashed var(--accent-2); font-size: 0.78rem; color: var(--text-sub);
}
.upload-btn:hover { background: var(--board-bg); }

.control-buttons { display: flex; gap: 8px; }
.btn {
  flex: 1; padding: 11px 10px; border: none; border-radius: 12px;
  font-weight: 700; font-size: 0.85rem; transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 4px 14px rgba(0,0,0,0.2); }
.btn-secondary { background: var(--board-bg); color: var(--text-main); }
.btn-outline { background: transparent; border: 2px solid var(--board-bg); color: var(--text-main); }
.btn-outline:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-danger { background: var(--danger); color: #fff; }

.daily-info { background: var(--board-bg); border-radius: 12px; padding: 10px 12px; font-size: 0.78rem; }
.daily-info p { margin: 2px 0; }

/* ---------- 盤面エリア ---------- */
.board-area { display: flex; flex-direction: column; align-items: center; gap: 12px; }

.hud {
  display: flex; gap: 10px; width: 100%; max-width: 520px;
}
.hud-item {
  flex: 1; background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 14px; padding: 8px 6px; text-align: center; box-shadow: var(--shadow);
}
.hud-label { display: block; font-size: 0.68rem; color: var(--text-sub); font-weight: 600; }
.hud-value { display: block; font-size: 1.3rem; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }

.board-wrap {
  position: relative;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1;
}
.board {
  position: relative;
  width: 100%; height: 100%;
  background: var(--board-bg);
  border-radius: 16px;
  box-shadow: var(--shadow), inset 0 0 0 2px var(--card-border);
  overflow: hidden;
}
.tile {
  position: absolute;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--tile-bg-1), var(--tile-bg-2));
  color: var(--tile-text);
  font-weight: 800;
  user-select: none;
  cursor: pointer;
  box-shadow: 0 3px 8px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.25);
  transition: top 0.16s ease, left 0.16s ease, transform 0.1s ease, filter 0.15s ease;
  background-repeat: no-repeat;
}
.tile:hover { filter: brightness(1.08); }
.tile:active { transform: scale(0.96); }
.tile.movable::after {
  content: '';
  position: absolute; inset: 0; border-radius: 10px;
  box-shadow: 0 0 0 2px rgba(255,255,255,0.5) inset;
  opacity: 0; transition: opacity 0.15s ease;
}
.tile.movable:hover::after { opacity: 1; }
.tile .num-overlay {
  position: absolute; bottom: 2px; right: 4px; font-size: 0.6em;
  background: rgba(0,0,0,0.45); color: #fff; border-radius: 4px; padding: 0 4px;
}
.tile.just-moved { z-index: 5; }

.hint-overlay {
  position: absolute; inset: 0; border-radius: 16px;
  background-size: cover; background-position: center;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
  background-color: rgba(0,0,0,0.75);
  z-index: 20;
  flex-wrap: wrap; overflow: hidden;
}
.hint-overlay.show { opacity: 1; pointer-events: auto; }
.hint-overlay .hint-label {
  position: absolute; top: 10px; left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,0.6); color: #fff; padding: 4px 12px; border-radius: 20px; font-size: 0.75rem;
}
.hint-tile {
  position: absolute; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--tile-bg-1), var(--tile-bg-2));
  color: var(--tile-text); font-weight: 800; border-radius: 8px;
  background-repeat: no-repeat; background-size: var(--hbg-size);
}

.win-overlay {
  position: absolute; inset: 0; border-radius: 16px;
  background: rgba(20,15,40,0.72);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transform: scale(0.9);
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 30;
}
.win-overlay.show { opacity: 1; pointer-events: auto; transform: scale(1); }
.win-card {
  background: var(--card-bg); border-radius: 20px; padding: 28px 26px;
  text-align: center; max-width: 320px; box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.win-emoji { font-size: 3rem; }
.win-card h2 { font-size: 1.5rem; margin: 6px 0; color: var(--accent); }
.win-card p { color: var(--text-sub); font-size: 0.85rem; margin-bottom: 10px; }
#winAchievements { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.win-ach-item {
  background: var(--board-bg); border-radius: 10px; padding: 6px 10px; font-size: 0.75rem;
  display: flex; align-items: center; gap: 8px; text-align: left;
}

#confettiCanvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 999;
}

/* ---------- パネル(モーダル) ---------- */
.panel-overlay {
  position: fixed; inset: 0; background: rgba(10,8,20,0.55);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
  z-index: 100; padding: 16px;
}
.panel-overlay.show { opacity: 1; pointer-events: auto; }
.panel {
  width: 100%; max-width: 560px; max-height: 84vh; overflow-y: auto;
  padding: 22px;
}
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.panel-head h2 { font-size: 1.15rem; }
.close-btn { width: 32px; height: 32px; border: none; border-radius: 10px; background: var(--board-bg); font-size: 1rem; }
.sub-head { font-size: 0.95rem; margin: 16px 0 8px; color: var(--accent); }

.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.stat-box { background: var(--board-bg); border-radius: 12px; padding: 10px 12px; }
.stat-box .stat-val { font-size: 1.3rem; font-weight: 800; color: var(--accent); display: block; }
.stat-box .stat-lbl { font-size: 0.7rem; color: var(--text-sub); }

.best-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.best-table th, .best-table td { padding: 6px 8px; text-align: center; border-bottom: 1px solid var(--board-bg); }
.best-table th { color: var(--text-sub); font-size: 0.7rem; }

.ach-progress { font-size: 0.8rem; color: var(--text-sub); font-weight: 400; }
.ach-list { display: flex; flex-direction: column; gap: 8px; }
.ach-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px;
  background: var(--board-bg); border-radius: 12px; opacity: 0.55;
}
.ach-item.unlocked { opacity: 1; box-shadow: 0 0 0 2px var(--accent-2) inset; }
.ach-icon { font-size: 1.5rem; width: 36px; text-align: center; }
.ach-body { flex: 1; }
.ach-name { font-weight: 700; font-size: 0.85rem; }
.ach-desc { font-size: 0.7rem; color: var(--text-sub); }
.ach-cat { font-size: 0.6rem; color: var(--accent); font-weight: 700; text-transform: uppercase; }

.theme-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.theme-swatch {
  border-radius: 12px; padding: 12px 6px; text-align: center; font-size: 0.75rem;
  font-weight: 700; border: 2px solid transparent; position: relative; color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.4);
}
.theme-swatch.active { border-color: var(--accent); }
.theme-swatch.locked { opacity: 0.4; cursor: not-allowed; }
.theme-swatch .lock-icon { position: absolute; top: 4px; right: 6px; font-size: 0.9rem; }

.changelog { max-height: 160px; overflow-y: auto; font-size: 0.75rem; color: var(--text-sub); display: flex; flex-direction: column; gap: 6px; }
.changelog .cl-entry { border-left: 3px solid var(--accent-2); padding-left: 8px; }
.changelog .cl-ver { font-weight: 700; color: var(--text-main); }

/* ---------- トースト ---------- */
.toast-stack {
  position: fixed; top: 16px; right: 16px; display: flex; flex-direction: column; gap: 8px;
  z-index: 500; max-width: 300px;
}
.toast {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 12px; padding: 10px 14px; box-shadow: var(--shadow);
  display: flex; align-items: center; gap: 10px;
  animation: toast-in 0.3s ease, toast-out 0.4s ease 3.6s forwards;
  font-size: 0.8rem;
}
.toast .toast-icon { font-size: 1.4rem; }
.toast .toast-title { font-weight: 700; }
.toast .toast-sub { color: var(--text-sub); font-size: 0.7rem; }
@keyframes toast-in { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toast-out { to { transform: translateX(120%); opacity: 0; } }

/* ---------- レスポンシブ ---------- */
@media (max-width: 520px) {
  .brand-text h1 { font-size: 1.05rem; }
  .level-badge { min-width: 120px; }
  .hud-value { font-size: 1.05rem; }
  .win-card { padding: 20px 16px; }
}