:root {
  --ink: #1f3a35;
  --ink-soft: #5b716c;
  --bg: #e4ece6;
  --paper: #fbfdfb;
  --line: #cfdcd4;
  --well: #24483f;
  --well-edge: #183630;
  --wood: #e9c58a;
  --wood-hi: #f6dcab;
  --wood-edge: #b98a4a;
  --wood-ink: #4a2f12;
  --ok: #7fbf8e;
  --primary: #2e7d68;
  --primary-dark: #1d5a4a;
  --gold: #f2c14e;
  --font: "Zen Kaku Gothic New", system-ui, sans-serif;
  --num: "Big Shoulders Display", "Zen Kaku Gothic New", sans-serif;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); font-weight: 500; line-height: 1.7; line-break: strict; }
.hidden { display: none !important; }
.nw { white-space: nowrap; }

.g-head { display: flex; align-items: center; gap: 10px; padding: 10px 16px; max-width: 520px; margin: 0 auto; font-size: 13px; font-weight: 900; }
.g-brand { color: var(--ink-soft); text-decoration: none; }
.g-title { flex: 1; text-align: center; }
.g-head [data-mg-account] a { color: var(--primary-dark); text-decoration: none; }

main { max-width: 520px; margin: 0 auto; padding: 0 12px 24px; }
.play { position: relative; user-select: none; -webkit-user-select: none; }

.bar { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.box { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 6px 10px; text-align: center; min-width: 0; }
.lbl { font-size: 11px; font-weight: 900; color: var(--ink-soft); white-space: nowrap; }
.val { font: 800 26px/1.1 var(--num); font-variant-numeric: tabular-nums; white-space: nowrap; }
.val.sm { font: 900 15px/1.7 var(--font); }

/* 盤（札は空きマスへすべる。位置は translate で、札1枚分＝100%） */
.board-wrap { background: var(--well); border-radius: 18px; padding: 8px; box-shadow: inset 0 3px 0 var(--well-edge), 0 10px 26px rgba(31, 58, 53, 0.18); }
.board { position: relative; aspect-ratio: 1; touch-action: none; --n: 4; }
.tile { position: absolute; left: 0; top: 0; width: calc(100% / var(--n)); height: calc(100% / var(--n)); padding: 0; margin: 0; border: 3px solid transparent; border-radius: 12px; background-clip: padding-box;
  background-color: var(--wood); background-image: linear-gradient(160deg, var(--wood-hi) 0%, var(--wood) 55%); box-shadow: inset 0 -5px 0 var(--wood-edge);
  color: var(--wood-ink); font: 800 clamp(26px, 10vw, 46px)/1 var(--num); font-variant-numeric: tabular-nums; cursor: pointer; transition: transform 0.09s ease-out; touch-action: none; }
.board[data-n="5"] .tile { font-size: clamp(22px, 7.6vw, 36px); border-width: 2px; border-radius: 10px; }
.board[data-n="3"] .tile { font-size: clamp(34px, 13vw, 58px); }
.tile.ok { box-shadow: inset 0 -5px 0 var(--wood-edge), inset 0 0 0 3px var(--ok); }
.board.instant .tile { transition: none; }
.play.solved .tile { background-image: linear-gradient(160deg, #fff1cf 0%, var(--gold) 60%); box-shadow: inset 0 -5px 0 #c99a2e; }
.board.shake { animation: shake 0.25s; }
@keyframes shake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }
@media (prefers-reduced-motion: reduce) { .tile { transition: none; } .board.shake { animation: none; } }

.tools { display: flex; justify-content: space-between; gap: 8px; margin-top: 10px; }
.tool { display: inline-flex; align-items: center; gap: 4px; padding: 9px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); color: var(--ink); font: 900 13px/1 var(--font); cursor: pointer; }
.tool:disabled { opacity: 0.35; cursor: default; }
.kbd { margin: 8px 0 0; font-size: 12px; color: var(--ink-soft); text-align: center; }

/* タイトル・結果（盤を隠して全体を見せる） */
.play.menu .bar, .play.menu .board-wrap, .play.menu .tools, .play.menu .kbd { display: none; }
.card-ui { width: 100%; max-width: 420px; margin: 0 auto; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; padding: 20px 16px 16px; text-align: center; box-shadow: 0 10px 30px rgba(43, 42, 51, 0.1); }
.logo { margin: 0; font: 900 30px/1.3 var(--font); letter-spacing: 0.06em; white-space: nowrap; }
.day { margin: 2px 0 12px; font-size: 13px; color: var(--ink-soft); font-weight: 900; }
.daily-box { border: 2px solid var(--primary); border-radius: 16px; padding: 12px; margin-bottom: 10px; }
.daily-lbl { font-size: 11px; font-weight: 900; color: var(--ink-soft); letter-spacing: 0.1em; }
.daily-name { font: 900 24px/1.4 var(--font); color: var(--primary-dark); }
.daily-note { margin: 4px 0 8px; font-size: 12px; color: var(--ink-soft); }
.done { font-size: 14px; font-weight: 900; margin-top: 6px; }
.free-lbl { font-size: 12px; font-weight: 900; color: var(--ink-soft); margin: 6px 0 4px; }
.free-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.howto { list-style: none; margin: 12px 0 0; padding: 10px 12px; background: var(--bg); border-radius: 12px; text-align: left; font-size: 13px; font-weight: 700; }
.howto li { display: flex; align-items: baseline; gap: 6px; padding: 3px 0; }
.howto .num { flex: none; font-weight: 900; color: var(--primary); }
.stats { font-size: 12px; color: var(--ink-soft); font-weight: 700; margin: 10px 0 0; }

.btn { display: block; width: 100%; margin: 8px 0; padding: 13px 10px; border: 0; border-radius: 14px; font: 900 16px/1.2 var(--font); cursor: pointer; background: var(--bg); color: var(--ink); }
.btn small { display: block; font-size: 11px; font-weight: 700; color: var(--ink-soft); margin-top: 3px; }
.btn.primary { background: var(--primary); color: #fff; box-shadow: 0 4px 0 var(--primary-dark); }
.btn.primary:active { transform: translateY(2px); box-shadow: 0 2px 0 var(--primary-dark); }
.btn.lv { margin: 0; font-size: 15px; padding: 10px 2px; }
.btn.sub { font-size: 14px; }
.btn.ghost { background: transparent; border: 2px solid var(--line); color: var(--ink-soft); font-size: 14px; }
.btn.x { background: #000; color: #fff; display: flex; align-items: center; justify-content: center; gap: 8px; }
.btn:disabled { opacity: 0.5; cursor: default; }

.clear-lbl { font-size: 13px; font-weight: 900; color: var(--primary-dark); }
.clear-time { font: 800 64px/1 var(--num); font-variant-numeric: tabular-nums; margin: 6px 0; }
.clear-sub { margin: 0; font-size: 14px; font-weight: 700; }
.best { display: inline-block; margin: 8px 0 0; padding: 2px 12px; border-radius: 999px; background: var(--gold); font-weight: 900; font-size: 13px; }
.rank { margin: 12px 0; padding: 8px; background: var(--bg); border-radius: 14px; }
.rank-lbl { font-size: 11px; font-weight: 900; color: var(--ink-soft); }
.rank-name { font: 900 22px/1.4 var(--font); }
.c-note { margin: 8px 0; padding: 8px 10px; border-radius: 12px; background: #fff6dd; font-size: 13px; font-weight: 700; text-align: left; }
.share { margin: 8px 0; }

.toast { position: absolute; left: 50%; top: 40%; transform: translate(-50%, -50%); z-index: 40; max-width: calc(100% - 24px); padding: 10px 18px; border-radius: 16px; background: rgba(43, 42, 51, 0.92); color: #fff; font-weight: 900; font-size: 14px; text-align: center; pointer-events: none; }

/* 下の解説（ポータルと同じ決まり: 行間 1.85・段落の間は1行分・見出しは前を広く後ろを狭く） */
.guide { margin-top: 28px; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; padding: 22px 20px 12px; font-size: 15px; line-height: 1.85; }
.guide p { margin: 0 0 1em; }
.guide h2 { font: 900 19px/1.4 var(--font); margin: 32px 0 12px; padding-left: 10px; border-left: 5px solid var(--primary); }
.guide h2:first-child { margin-top: 0; }
.guide h3 { font-size: 16px; margin: 22px 0 6px; line-height: 1.5; }
.guide ul { padding-left: 1.3em; margin: 0 0 1em; }
.guide li { margin: 6px 0; }
.guide .steps { list-style: none; padding: 0; }
.guide .steps li { display: flex; align-items: baseline; gap: 6px; }
.guide .steps .num { flex: none; font-weight: 900; color: var(--primary); }
.guide details { border-top: 1px solid var(--line); padding: 12px 0; }
.guide details p { margin: 8px 0 4px; }
.guide summary { font-weight: 900; cursor: pointer; }
.guide a { color: var(--primary-dark); }
.g-foot { max-width: 520px; margin: 0 auto; padding: 14px 16px 28px; font-size: 12px; text-align: center; }
.g-foot a { color: var(--ink-soft); }

.card-ui .mg-box { background: var(--bg); border-color: transparent; }