/* ===== Speed Number Game - Styles ===== */
.sng-app {
    --sng-bg: #0f172a;
    --sng-cell: #1e293b;
    --sng-cell-hover: #334155;
    --sng-cell-done: #10b981;
    --sng-accent: #fbbf24;
    --sng-text: #f1f5f9;
    --sng-text-dim: #94a3b8;
    --sng-border: #334155;
    --sng-danger: #ef4444;
    --sng-btn-bg: #3b82f6;
    --sng-btn-bg-hover: #2563eb;
    box-sizing: border-box;
    max-width: 600px;
    margin: 20px auto;
    padding: 16px;
    background: var(--sng-bg);
    color: var(--sng-text);
    border-radius: 12px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
}
.sng-app *, .sng-app *::before, .sng-app *::after { box-sizing: border-box; }

.sng-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--sng-border);
}
.sng-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--sng-accent);
}
.sng-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 70px;
}
.sng-info-label {
    font-size: 0.7rem;
    color: var(--sng-text-dim);
    line-height: 1;
}
.sng-timer, .sng-next {
    font-size: 1.4rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
    color: var(--sng-accent);
}

.sng-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    align-items: center;
}
.sng-control-label {
    font-size: 0.85rem;
    color: var(--sng-text-dim);
}
.sng-difficulty {
    flex: 1 1 auto;
    min-width: 140px;
    padding: 8px 10px;
    background: var(--sng-cell);
    color: var(--sng-text);
    border: 1px solid var(--sng-border);
    border-radius: 6px;
    font-size: 0.9rem;
}
.sng-btn {
    padding: 8px 14px;
    background: var(--sng-btn-bg);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.15s;
    font-weight: 600;
}
.sng-btn:hover { background: var(--sng-btn-bg-hover); }
.sng-btn:active { transform: translateY(1px); }

.sng-board-wrap {
    position: relative;
    aspect-ratio: 1 / 1;
    margin: 0 auto;
}
.sng-board {
    display: grid;
    gap: 6px;
    width: 100%;
    height: 100%;
    padding: 6px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
}
.sng-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--sng-cell);
    color: var(--sng-text);
    border-radius: 6px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.1s, transform 0.1s;
    -webkit-tap-highlight-color: transparent;
    font-variant-numeric: tabular-nums;
}
.sng-cell:hover:not(.sng-done) { background: var(--sng-cell-hover); }
.sng-cell:active:not(.sng-done) { transform: scale(0.95); }
.sng-cell.sng-done {
    background: var(--sng-cell-done);
    color: #fff;
    cursor: default;
    opacity: 0.55;
}
.sng-cell.sng-wrong {
    background: var(--sng-danger) !important;
    animation: sngShake 0.3s;
}
@keyframes sngShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

/* オーバーレイ */
.sng-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.92);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    z-index: 10;
    text-align: center;
    padding: 16px;
}
.sng-overlay[hidden] { display: none; }
/* スタート用：背景は透明、クリックを盤面に通す（テキストバナーだけ表示） */
.sng-overlay-start {
    background: transparent;
    pointer-events: none;
    justify-content: flex-end;
    padding-bottom: 12px;
}
.sng-overlay-start .sng-overlay-text {
    background: rgba(15, 23, 42, 0.92);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 1rem;
    border: 1px solid #fbbf24;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    margin-bottom: 0;
    animation: sngPulse 1.6s ease-in-out infinite;
}
@keyframes sngPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
.sng-overlay-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--sng-accent);
    margin-bottom: 12px;
}
.sng-clear-time {
    font-size: 2rem;
    font-weight: 700;
    color: var(--sng-text);
    font-variant-numeric: tabular-nums;
    margin-bottom: 16px;
}
.sng-clear-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

/* モーダル */
.sng-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 16px;
}
.sng-modal[hidden] { display: none; }
.sng-modal-content {
    background: var(--sng-bg);
    color: var(--sng-text);
    padding: 24px;
    border-radius: 12px;
    max-width: 400px;
    width: 100%;
    border: 1px solid var(--sng-border);
}
.sng-modal-title {
    margin: 0 0 16px;
    color: var(--sng-accent);
}
.sng-name-input {
    width: 100%;
    padding: 10px;
    margin-bottom: 16px;
    background: var(--sng-cell);
    border: 1px solid var(--sng-border);
    border-radius: 6px;
    color: var(--sng-text);
    font-size: 1rem;
}
.sng-modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}
.sng-btn-cancel {
    background: var(--sng-cell-hover);
}
.sng-btn-cancel:hover {
    background: var(--sng-border);
}
.sng-modal-msg {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--sng-text-dim);
    min-height: 1.2em;
}
.sng-modal-msg.sng-msg-error { color: var(--sng-danger); }
.sng-modal-msg.sng-msg-ok { color: var(--sng-cell-done); }

/* ランキング */
.sng-ranking {
    margin-top: 20px;
    padding: 16px;
    background: rgba(0,0,0,0.25);
    border-radius: 8px;
    border: 1px solid var(--sng-border);
}
.sng-ranking[hidden] { display: none; }
.sng-ranking-title {
    margin: 0 0 12px;
    color: var(--sng-accent);
    font-size: 1.05rem;
}
.sng-ranking-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}
.sng-tab {
    padding: 6px 10px;
    background: var(--sng-cell);
    color: var(--sng-text-dim);
    border: 1px solid var(--sng-border);
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
}
.sng-tab.sng-tab-active {
    background: var(--sng-btn-bg);
    color: #fff;
    border-color: var(--sng-btn-bg);
}
.sng-ranking-list {
    list-style: none;
    counter-reset: rank;
    padding: 0;
    margin: 0 0 12px;
}
.sng-ranking-list li {
    display: flex;
    align-items: center;
    padding: 8px 10px;
    margin-bottom: 4px;
    background: var(--sng-cell);
    border-radius: 4px;
    counter-increment: rank;
    gap: 12px;
}
.sng-ranking-list li::before {
    content: counter(rank);
    font-weight: 700;
    color: var(--sng-accent);
    min-width: 24px;
}
.sng-ranking-list li:nth-child(1):not(.sng-ranking-empty)::before { content: "🥇"; }
.sng-ranking-list li:nth-child(2):not(.sng-ranking-empty)::before { content: "🥈"; }
.sng-ranking-list li:nth-child(3):not(.sng-ranking-empty)::before { content: "🥉"; }
.sng-ranking-list li.sng-ranking-empty {
    counter-increment: none;
    justify-content: center;
    color: var(--sng-text-dim);
    background: transparent;
    list-style: none;
}
.sng-ranking-list li.sng-ranking-empty::before {
    content: none;
    display: none;
}
.sng-rank-name {
    flex: 1;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sng-rank-time {
    font-variant-numeric: tabular-nums;
    color: var(--sng-text-dim);
    font-size: 0.9rem;
}

/* スマホ最適化 */
@media (max-width: 480px) {
    .sng-app { padding: 12px; margin: 10px auto; }
    .sng-title { font-size: 1.05rem; }
    .sng-timer, .sng-next { font-size: 1.2rem; }
    .sng-info-label { font-size: 0.65rem; }
    .sng-board { gap: 4px; padding: 4px; }
    .sng-overlay-text { font-size: 1.05rem; }
    .sng-clear-time { font-size: 1.5rem; }
    .sng-controls { gap: 6px; }
    .sng-btn { padding: 7px 10px; font-size: 0.85rem; }
    .sng-difficulty { padding: 7px 8px; font-size: 0.85rem; }
}