:root {
  --ink: #24304f;
  --ink-soft: #5e6886;
  --bg: #eef2fa;
  --well: #c9d3e8;
  --cell: #dfe6f3;
  --stone: #6b7186;
  --primary: #2f6fd6;
  --primary-dark: #1f4fa3;
  --gold: #ffd166;
  --line: #d6deec;
  --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; }

.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; }

/* 上の数字 */
.bar { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.box { background: var(--ink); color: #fff; border-radius: 12px; padding: 6px 10px; text-align: center; min-width: 0; }
.lbl { font-size: 11px; font-weight: 900; opacity: 0.75; 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); overflow: hidden; text-overflow: ellipsis; }

/* 盤 */
.board-wrap { background: var(--well); border-radius: 16px; padding: 8px; }
.board { position: relative; aspect-ratio: 1; touch-action: none; }
.cell, .tile { position: absolute; width: calc((100% - 24px) / 4); height: calc((100% - 24px) / 4); border-radius: 10px; }
.cell { background: var(--cell); }
.cell.stone { background: var(--stone); background-image: radial-gradient(circle at 30% 28%, rgba(255, 255, 255, 0.22) 0 12%, transparent 13%), radial-gradient(circle at 68% 64%, rgba(0, 0, 0, 0.18) 0 16%, transparent 17%); box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.25); }
.tile { display: flex; align-items: center; justify-content: center; font: 800 clamp(26px, 9vw, 44px)/1 var(--num); transition: transform 0.1s ease-out; box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.12); }
.tile.d3 { font-size: clamp(22px, 7.6vw, 38px); }
.tile.d4 { font-size: clamp(18px, 6.2vw, 30px); }
.tile.d5 { font-size: clamp(15px, 5vw, 24px); }
.tile.new { animation: appear 0.16s ease-out; }
.tile.pop { animation: pop 0.18s ease-out; z-index: 2; }
@keyframes appear { from { transform: var(--pos) scale(0.2); } }
@keyframes pop { 50% { transform: var(--pos) scale(1.16); } }
/* 数字ごとの色（2の何乗か） */
.v1 { background: #ffffff; color: #3b4766; }
.v2 { background: #e6f0ff; color: #2c4a86; }
.v3 { background: #b9d6ff; color: #1d3f86; }
.v4 { background: #7fb4ff; color: #fff; }
.v5 { background: #4f8ef7; color: #fff; }
.v6 { background: #2f6fd6; color: #fff; }
.v7 { background: #7b61ff; color: #fff; }
.v8 { background: #a14ee8; color: #fff; }
.v9 { background: #d64fc0; color: #fff; }
.v10 { background: #f2509a; color: #fff; }
.v11 { background: #ff7a59; color: #fff; box-shadow: 0 0 18px rgba(255, 122, 89, 0.6), inset 0 -4px 0 rgba(0, 0, 0, 0.15); }
.v12, .v13, .v14, .v15, .v16, .v17 { background: #ffc43d; color: #3b2a00; box-shadow: 0 0 22px rgba(255, 196, 61, 0.75), inset 0 -4px 0 rgba(0, 0, 0, 0.15); }

.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: 0; border-radius: 12px; background: #fff; 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: 11px; 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; }
.play.review .tools #b-undo { display: none; }
.card-ui { width: 100%; max-width: 420px; margin: 0 auto; background: #fff; border-radius: 18px; padding: 20px 16px 16px; text-align: center; box-shadow: 0 10px 30px rgba(36, 48, 79, 0.12); }
.logo { margin: 0; font-size: 28px; font-weight: 900; letter-spacing: 0.04em; 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-size: 24px; font-weight: 900; color: var(--primary-dark); line-height: 1.35; }
.daily-desc { margin: 2px 0 0; font-size: 13px; font-weight: 700; }
.daily-note { margin: 6px 0 8px; font-size: 12px; color: var(--ink-soft); }
.done { font-size: 14px; font-weight: 900; margin-top: 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: #eef2fa; color: var(--ink); }
.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.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-score { display: flex; align-items: baseline; justify-content: center; gap: 6px; margin: 6px 0; }
.clear-score b { font: 800 64px/1 var(--num); font-variant-numeric: tabular-nums; }
.clear-score span { font-weight: 900; }
.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-size: 24px; font-weight: 900; }
.share { margin: 8px 0; }
.c-note { margin: 8px 0; padding: 8px 10px; border-radius: 12px; background: #fff6dd; font-size: 13px; font-weight: 700; text-align: left; }

.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(20, 26, 44, 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: #fff; border-radius: 18px; padding: 22px 20px 12px; font-size: 15px; line-height: 1.85; }
.guide p { margin: 0 0 1em; }
.guide h2 { font-size: 19px; margin: 32px 0 12px; padding-left: 10px; border-left: 5px solid var(--primary); line-height: 1.4; }
.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; }