/* ===== CSS カスタムプロパティ（テーマカラー） ===== */
:root {
    --theme:        #c9a3ff;
    --theme-glow:   rgba(201, 163, 255, 0.5);
    --theme-dim:    rgba(201, 163, 255, 0.3);
    --theme-subtle: rgba(201, 163, 255, 0.13);
    --theme-border: rgba(218, 199, 244, 0.42);
    --theme-hover:  rgba(201, 163, 255, 0.24);
    --twilight-text:   #f8f0ff;
    --twilight-soft:   #dac7f4;
    --twilight-muted:  #b99ad9;
    --twilight-accent: #c9a3ff;
    --twilight-subtle: rgba(201, 163, 255, 0.13);
    --twilight-border: rgba(218, 199, 244, 0.42);
    --twilight-hover:  rgba(201, 163, 255, 0.24);
    --twilight-faint:  rgba(218, 199, 244, 0.44);
    --twilight-glow:   rgba(201, 163, 255, 0.5);
    /* セマンティックカラー（テーマに依存しない） */
    --color-danger:      rgba(255, 100, 100, 0.6);
    --color-danger-text: rgba(255, 100, 100, 0.8);
}

.theme-purple {
    --theme:        #c9a3ff;
    --theme-glow:   rgba(201, 163, 255, 0.5);
    --theme-dim:    rgba(201, 163, 255, 0.3);
    --theme-subtle: rgba(201, 163, 255, 0.13);
    --theme-border: rgba(218, 199, 244, 0.42);
    --theme-hover:  rgba(201, 163, 255, 0.24);
    --twilight-text:   #f8f0ff;
    --twilight-soft:   #dac7f4;
    --twilight-muted:  #b99ad9;
    --twilight-accent: #c9a3ff;
    --twilight-subtle: rgba(201, 163, 255, 0.13);
    --twilight-border: rgba(218, 199, 244, 0.42);
    --twilight-hover:  rgba(201, 163, 255, 0.24);
    --twilight-faint:  rgba(218, 199, 244, 0.44);
    --twilight-glow:   rgba(201, 163, 255, 0.5);
}

.theme-blue {
    --theme:        #9bbcff;
    --theme-glow:   rgba(155, 188, 255, 0.46);
    --theme-dim:    rgba(155, 188, 255, 0.28);
    --theme-subtle: rgba(155, 188, 255, 0.12);
    --theme-border: rgba(190, 207, 255, 0.36);
    --theme-hover:  rgba(155, 188, 255, 0.22);
    --twilight-text:   #f2f5ff;
    --twilight-soft:   #cbd8ff;
    --twilight-muted:  #a9bce9;
    --twilight-accent: #9bbcff;
    --twilight-subtle: rgba(155, 188, 255, 0.12);
    --twilight-border: rgba(190, 207, 255, 0.36);
    --twilight-hover:  rgba(155, 188, 255, 0.22);
    --twilight-faint:  rgba(203, 216, 255, 0.42);
    --twilight-glow:   rgba(155, 188, 255, 0.46);
}

.theme-rose {
    --theme:        #f0a6d6;
    --theme-glow:   rgba(240, 166, 214, 0.44);
    --theme-dim:    rgba(240, 166, 214, 0.28);
    --theme-subtle: rgba(240, 166, 214, 0.12);
    --theme-border: rgba(244, 194, 226, 0.38);
    --theme-hover:  rgba(240, 166, 214, 0.22);
    --twilight-text:   #fff2fb;
    --twilight-soft:   #f0c8e4;
    --twilight-muted:  #cf9ec2;
    --twilight-accent: #f0a6d6;
    --twilight-subtle: rgba(240, 166, 214, 0.12);
    --twilight-border: rgba(244, 194, 226, 0.38);
    --twilight-hover:  rgba(240, 166, 214, 0.22);
    --twilight-faint:  rgba(240, 200, 228, 0.42);
    --twilight-glow:   rgba(240, 166, 214, 0.44);
}

.theme-green {
    --theme:        #a8d6b1;
    --theme-glow:   rgba(168, 214, 177, 0.38);
    --theme-dim:    rgba(168, 214, 177, 0.24);
    --theme-subtle: rgba(168, 214, 177, 0.1);
    --theme-border: rgba(190, 226, 198, 0.32);
    --theme-hover:  rgba(168, 214, 177, 0.18);
    --twilight-text:   #f2fff6;
    --twilight-soft:   #cde8d4;
    --twilight-muted:  #a7c7ad;
    --twilight-accent: #a8d6b1;
    --twilight-subtle: rgba(168, 214, 177, 0.1);
    --twilight-border: rgba(190, 226, 198, 0.32);
    --twilight-hover:  rgba(168, 214, 177, 0.18);
    --twilight-faint:  rgba(205, 232, 212, 0.4);
    --twilight-glow:   rgba(168, 214, 177, 0.38);
}

.theme-gold {
    --theme:        #f4d38c;
    --theme-glow:   rgba(244, 211, 140, 0.4);
    --theme-dim:    rgba(244, 211, 140, 0.24);
    --theme-subtle: rgba(244, 211, 140, 0.1);
    --theme-border: rgba(244, 211, 140, 0.32);
    --theme-hover:  rgba(244, 211, 140, 0.18);
    --twilight-text:   #fff8ea;
    --twilight-soft:   #ead8b7;
    --twilight-muted:  #cdb17a;
    --twilight-accent: #f4d38c;
    --twilight-subtle: rgba(244, 211, 140, 0.1);
    --twilight-border: rgba(244, 211, 140, 0.32);
    --twilight-hover:  rgba(244, 211, 140, 0.18);
    --twilight-faint:  rgba(234, 216, 183, 0.4);
    --twilight-glow:   rgba(244, 211, 140, 0.4);
}

/* ===== リセット・ベース ===== */
html {
    font-size: 18px;
}

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

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    color: var(--twilight-text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0a1628;
    overflow-x: hidden;
    overflow-y: auto;
}

/* ===== App コンテナ ===== */
.app {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* ===== スタート画面 ===== */
.start-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 100vh;
}

.start-content {
    text-align: center;
    padding: 2rem;
    max-width: 600px;
    color: var(--twilight-text);
}

.title-label {
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--twilight-muted);
    margin-bottom: 1rem;
}

.game-title-label {
    color: var(--twilight-text);
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 10px var(--twilight-glow);
}

.title-logo {
    display: block;
    width: min(72vw, 360px);
    height: auto;
    margin: 0 auto 1.25rem;
    border-radius: 16px;
    box-shadow: 0 0 30px var(--twilight-glow);
    -webkit-mask-image: radial-gradient(
        ellipse at center,
        #000 58%,
        rgba(0, 0, 0, 0.85) 72%,
        transparent 100%
    );
    mask-image: radial-gradient(
        ellipse at center,
        #000 58%,
        rgba(0, 0, 0, 0.85) 72%,
        transparent 100%
    );
}

.game-title {
    font-size: 2.5rem;
    font-style: italic;
    color: var(--twilight-text);
    text-shadow: 0 0 30px var(--twilight-glow);
    line-height: 1.3;
    margin-bottom: 0.75rem;
}

.question-count {
    font-size: 0.9rem;
    color: var(--twilight-text);
    margin-bottom: 1rem;
    text-shadow: 0 0 12px var(--twilight-glow);
}

.difficulty-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.diff-btn {
    background: var(--twilight-subtle);
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    transition: background 0.2s, border-color 0.2s;
    min-width: 0;
}

.difficulty-buttons > .diff-btn {
    flex: 1 1 0;
}

.diff-btn:hover {
    background: var(--twilight-hover);
    border-color: var(--twilight-accent);
}

.diff-hint {
    font-size: 0.85rem;
    color: var(--twilight-soft);
    margin-top: 0.25rem;
    display: block;
    white-space: nowrap;
}

/* ===== ゲーム画面 ===== */
.game-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    width: 100%;
    max-width: 700px;
    min-height: 100vh;
    justify-content: center;
}

.game-header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    justify-content: space-between;
    width: 100%;
    font-size: 0.85rem;
    color: var(--twilight-text);
    letter-spacing: 0.05em;
}

.song-display {
    text-align: center;
}

.now-typing {
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    color: var(--twilight-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.song-title {
    font-size: 1.8rem;
    font-style: italic;
    color: var(--twilight-text);
    text-shadow: 0 0 20px var(--twilight-glow);
    margin-bottom: 0.25rem;
}

.song-work {
    font-size: 0.9rem;
    color: var(--twilight-muted);
}

/* タイピング対象テキスト表示 */
.target-text {
    font-size: 1.4rem;
    letter-spacing: 0.1em;
    font-family: 'Courier New', monospace;
    position: relative;
    width: 100%;
    max-width: 100%;
    overflow-wrap: anywhere;
    text-align: center;
    white-space: pre-wrap;
}

.typed {
    color: var(--twilight-accent);
    display: inline;
}

.remaining {
    color: var(--twilight-faint);
    display: inline;
}

/* ===== タイプ成功エフェクト ===== */
@keyframes just-typed-pop {
    0%   { transform: scale(1.4); text-shadow: 0 0 12px var(--twilight-glow); }
    100% { transform: scale(1);   text-shadow: none; }
}

.just-typed {
    display: inline-block;
    animation: just-typed-pop 150ms ease-out forwards;
}

.empty-pool-error {
    color: var(--twilight-accent);
    font-size: 0.85em;
    margin-top: 0.5em;
    text-align: center;
}

@keyframes particle-fly {
    0%   { opacity: 1; transform: translate(0, 0) scale(1); }
    100% { opacity: 0; transform: translate(var(--px), var(--py)) scale(0.3); }
}

.particle {
    position: absolute;
    top: 0.5em;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--twilight-accent);
    box-shadow: 0 0 6px var(--twilight-glow);
    animation: particle-fly 250ms ease-out forwards;
    pointer-events: none;
}

/* 入力フィールド */
.typing-input {
    background: var(--twilight-subtle);
    border: 1px solid var(--twilight-border);
    border-radius: 24px;
    padding: 0.75rem 1.5rem;
    color: var(--twilight-text);
    font-size: 1.1rem;
    font-family: 'Courier New', monospace;
    letter-spacing: 0.1em;
    width: 100%;
    max-width: 500px;
    outline: none;
    text-align: center;
    caret-color: var(--twilight-accent);
}

.typing-input:focus {
    border-color: var(--twilight-accent);
    box-shadow: 0 0 12px var(--twilight-glow);
}

/* ===== 結果画面 ===== */
.result-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 100vh;
}

.result-content {
    text-align: center;
    padding: 2rem;
    max-width: 500px;
    color: var(--twilight-text);
}

.result-label {
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--twilight-accent);
    margin-bottom: 0.5rem;
}

.result-subtitle {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--twilight-muted);
    margin-bottom: 1rem;
}

.result-divider {
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--twilight-accent), transparent);
    margin: 1rem auto;
}

/* ランク文字 */
.rank {
    font-size: 5rem;
    font-weight: bold;
    line-height: 1;
    margin: 0.5rem 0;
}

.rank-s { color: var(--twilight-text); text-shadow: 0 0 40px var(--twilight-accent), 0 0 80px var(--twilight-glow); }
.rank-a { color: #f4d38c; text-shadow: 0 0 30px rgba(244, 211, 140, 0.55); }
.rank-b { color: #c9d5ff; text-shadow: 0 0 30px rgba(201, 213, 255, 0.45); }
.rank-c { color: var(--twilight-muted); }

.rank-label-text {
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    color: var(--twilight-muted);
    margin-bottom: 0.6rem;
}

.rank-knights {
    font-size: 0.95rem;
    letter-spacing: 0.4em;
    color: #f4d38c;
    text-shadow: 0 0 18px rgba(244, 211, 140, 0.7), 0 0 40px rgba(244, 211, 140, 0.35);
    margin-bottom: 1.2rem;
}

.result-stats {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin: 1rem 0;
}

.stat-value {
    font-size: 1.2rem;
    color: var(--twilight-accent);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--twilight-muted);
}

.result-score {
    font-size: 1rem;
    color: var(--twilight-text);
    margin: 0.5rem 0;
}

.result-mode {
    font-size: 0.75rem;
    color: var(--twilight-muted);
    letter-spacing: 0.15em;
    margin-top: 0.4rem;
}

.result-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.replay-btn,
.save-btn {
    background: none;
    border: 1px solid var(--twilight-border);
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.2s;
}

.replay-btn {
    color: var(--twilight-accent);
    padding: 0.6rem 2rem;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.save-btn {
    color: var(--twilight-muted);
    padding: 0.6rem 1.5rem;
    font-size: 0.85rem;
}

.replay-btn:hover,
.save-btn:hover {
    background: var(--twilight-subtle);
}

/* ===== デバイス選択画面 ===== */
.device-select-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 100vh;
}

.device-select-content {
    text-align: center;
    padding: 2rem;
    max-width: 600px;
    color: var(--twilight-text);
}

.device-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2.5rem;
}

.device-btn {
    background: var(--twilight-subtle);
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 1.25rem 2rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 1.1rem;
    transition: background 0.2s, border-color 0.2s;
    min-width: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.device-btn:hover {
    background: var(--twilight-hover);
    border-color: var(--twilight-accent);
}

.device-hint {
    font-size: 0.85rem;
    color: var(--twilight-soft);
    display: block;
}

.input-notice {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 2rem auto 0;
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--twilight-border);
    border-radius: 8px;
    background: var(--twilight-subtle);
    max-width: 480px;
    text-align: left;
    font-size: 0.8rem;
    color: var(--twilight-soft);
    line-height: 1.5;
}

.notice-icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--twilight-accent);
    color: #241226;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.75rem;
}

.notice-text b {
    color: var(--twilight-text);
}

/* ===== PC専用ブロックオーバーレイ ===== */
.pc-only-overlay {
    display: none;
}

@media (max-width: 767px) {
    .pc-only-overlay {
        display: flex;
        position: fixed;
        inset: 0;
        z-index: 9999;
        background: #0a0a14;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 1.5rem;
        padding: 2rem;
        text-align: center;
    }

    .pc-only-overlay .overlay-icon {
        font-size: 3rem;
        opacity: 0.7;
    }

    .pc-only-overlay .overlay-title {
        font-size: 1.4rem;
        color: #c9a3ff;
        letter-spacing: 0.1em;
    }

    .pc-only-overlay .overlay-message {
        font-size: 0.95rem;
        color: #aaa;
        line-height: 1.8;
        max-width: 320px;
    }
}

/* ===== リタイアボタン ===== */
.retire-btn {
    background: none;
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 0.2rem 0.75rem;
    border-radius: 12px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color 0.2s, color 0.2s;
}

.retire-btn:hover {
    border-color: var(--color-danger);
    color: var(--color-danger-text);
}

/* ===== フォントサイズクラス ===== */
.font-small  .target-text         { font-size: 1.1rem; }
.font-small  .typing-input        { font-size: 0.9rem; }
.font-small  .typing-input-preview{ font-size: 0.9rem; }
.font-medium .target-text         { font-size: 1.4rem; }
.font-medium .typing-input        { font-size: 1.1rem; }
.font-medium .typing-input-preview{ font-size: 1.1rem; }
.font-large  .target-text         { font-size: 1.8rem; }
.font-large  .typing-input        { font-size: 1.4rem; }
.font-large  .typing-input-preview{ font-size: 1.4rem; }


/* ===== 設定ヘッダー ===== */
.settings-header {
    font-size: 1.1rem;
    letter-spacing: 0.2em;
    color: var(--twilight-text);
    text-transform: uppercase;
    margin: 0 0 0.5rem;
}

/* ===== フォントサイズプレビュー ===== */
.settings-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    box-sizing: border-box;
    min-height: 8.5rem;
    margin-top: -0.85rem;
}

.typing-input-preview {
    background: var(--twilight-subtle);
    border: 1px solid var(--twilight-accent);
    border-radius: 24px;
    padding: 0.5rem 1.2rem;
    color: var(--twilight-text);
    font-family: 'Courier New', monospace;
    letter-spacing: 0.1em;
    width: 90%;
    text-align: center;
    box-sizing: border-box;
    box-shadow: 0 0 10px var(--twilight-glow);
}

/* ===== 設定パネル ===== */
.settings-open-btn {
    margin-top: 1.5rem;
    background: none;
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 0.5rem 2rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    transition: background 0.2s;
}

.settings-open-btn:hover {
    background: var(--twilight-subtle);
}

.settings-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 0;
}

.settings-label {
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    color: var(--twilight-text);
    margin-bottom: 0.25rem;
}

.settings-label-song-filter {
    margin-top: 0.75rem;
}

.settings-buttons {
    display: flex;
    gap: 0.75rem;
}

.settings-btn {
    background: var(--twilight-subtle);
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: background 0.2s, border-color 0.2s;
}

.settings-btn:hover,
.settings-btn.selected {
    background: var(--twilight-hover);
    border-color: var(--twilight-accent);
}

.settings-colors {
    display: flex;
    gap: 0.75rem;
}

.color-swatch {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s;
}

.color-swatch:hover {
    transform: scale(1.15);
}

.color-swatch.selected {
    border-color: var(--twilight-text);
    transform: scale(1.15);
}

.settings-close-btn {
    background: none;
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 0.5rem 2rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    transition: background 0.2s;
}

.settings-close-btn:hover {
    background: var(--twilight-subtle);
}

/* ===== SONG FILTER ===== */
.song-filter-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

@media (max-width: 480px) {
    .song-filter-buttons {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        width: 100%;
    }
}

.sf-btn {
    border-width: 1px;
    border-style: solid;
    border-radius: 8px;
    padding: 0.5rem 1.25rem;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: filter 0.15s, box-shadow 0.15s;
}

.sf-btn:hover {
    filter: brightness(1.15);
}

/* 配色 C′ — 非選択 */
.sf-all  { background: #181826; border-color: #606080; color: #b8b8d8; }
.sf-jp   { background: #201418; border-color: #784860; color: #d8a0b8; }
.sf-nojp { background: #101828; border-color: #386898; color: #88b8e8; }
.sf-st   { background: #0e1e10; border-color: #387848; color: #88c898; }

/* 配色 C′ — 選択時 */
.sf-all.selected  { background: #282840; border-color: #a0a0d8; color: #e0e0ff; box-shadow: 0 0 10px rgba(160, 160, 216, 0.5); }
.sf-jp.selected   { background: #301828; border-color: #e888b0; color: #ffd0e0; box-shadow: 0 0 10px rgba(232, 136, 176, 0.5); }
.sf-nojp.selected { background: #102040; border-color: #60a8f0; color: #c0deff; box-shadow: 0 0 10px rgba(96, 168, 240, 0.5); }
.sf-st.selected   { background: #102818; border-color: #60d880; color: #b0ffcc; box-shadow: 0 0 10px rgba(96, 216, 128, 0.5); }

/* ===== アクセシビリティ: キーボードフォーカス ===== */
.diff-btn:focus-visible,
.device-btn:focus-visible,
.replay-btn:focus-visible,
.save-btn:focus-visible,
.settings-btn:focus-visible,
.settings-open-btn:focus-visible,
.settings-close-btn:focus-visible,
.retire-btn:focus-visible,
.color-swatch:focus-visible {
    outline: 2px solid var(--twilight-accent);
    outline-offset: 2px;
}


/* ===== デバッグモード ===== */
.debug-badge {
    position: fixed;
    top: 8px;
    right: 8px;
    background: rgba(255, 50, 50, 0.8);
    color: white;
    font-size: 11px;
    font-family: monospace;
    padding: 2px 8px;
    border-radius: 4px;
    z-index: 100;
    pointer-events: none;
}

.debug-btn {
    margin-top: 12px;
    opacity: 0.55;
    font-size: 0.85em;
}

.debug-btn:hover {
    opacity: 0.85;
}

.secret-btn-row {
    flex-basis: 100%;
    display: flex;
    justify-content: center;
    margin-top: 12px;
}

.secret-btn {
    width: calc((100% - 2 * 1rem) / 3);
    background: #201418;
    border-color: #784860;
    color: #d8a0b8;
}

.secret-btn:hover {
    background: #301828;
    border-color: #e888b0;
    color: #ffd0e0;
    box-shadow: 0 0 10px rgba(232, 136, 176, 0.5);
}

.debug-download-btn {
    background: transparent;
    border: 1px solid rgba(255, 100, 100, 0.5);
    color: rgba(255, 120, 120, 0.9);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85em;
    transition: background 0.2s;
}

.debug-download-btn:hover {
    background: rgba(255, 100, 100, 0.12);
}

.debug-download-btn:focus-visible {
    outline: 2px solid rgba(255, 100, 100, 0.6);
    outline-offset: 2px;
}

.debug-result-btn {
    background: transparent;
    border: 1px solid rgba(255, 100, 100, 0.4);
    color: rgba(255, 120, 120, 0.85);
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8em;
    transition: background 0.2s;
}

.debug-result-btn:hover {
    background: rgba(255, 100, 100, 0.12);
}

/* ── Parade unlock overlay ─────────────────────────────── */
.parade-unlock-overlay {
    position: fixed;
    inset: 0;
    background: rgba(6, 4, 14, 0.88);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    cursor: pointer;
    z-index: 100;
    animation: paradeOverlayIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}
@keyframes paradeOverlayIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.parade-unlock-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    pointer-events: none;
}
.parade-unlock-ring-outer {
    width: 220px;
    height: 220px;
    border: 1px solid var(--theme-dim);
    box-shadow: 0 0 60px var(--theme-subtle), inset 0 0 60px var(--theme-subtle);
    animation: paradeRingPulse 2.5s ease-in-out infinite;
}
.parade-unlock-ring-inner {
    width: 150px;
    height: 150px;
    border: 1px solid var(--theme-dim);
    box-shadow: 0 0 30px var(--theme-subtle), inset 0 0 30px var(--theme-subtle);
}
@keyframes paradeRingPulse {
    0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
    50%       { opacity: 1;   transform: translate(-50%, -50%) scale(1.04); }
}

.parade-unlock-text {
    position: relative;
    z-index: 1;
    text-align: center;
    animation: paradeTextIn 0.6s ease 0.2s both;
}
@keyframes paradeTextIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.parade-unlock-main {
    font-size: 1rem;
    color: var(--theme);
    text-shadow: 0 0 24px var(--theme-glow), 0 0 48px var(--theme-glow);
    letter-spacing: 0.06em;
}
.parade-unlock-keyword {
    font-size: 0.65rem;
    color: var(--twilight-muted);
    letter-spacing: 0.12em;
    margin-top: 0.3rem;
    line-height: 1.9;
}
.parade-unlock-hint {
    position: absolute;
    bottom: 1.2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.6rem;
    color: var(--twilight-muted);
    letter-spacing: 0.06em;
    white-space: nowrap;
    opacity: 0.5;
    z-index: 1;
}
.parade-unlock-close-btn {
    position: relative;
    z-index: 1;
    background: var(--twilight-subtle);
    border: 1px solid var(--theme-dim);
    border-radius: 20px;
    color: var(--theme);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.75rem;
    margin-top: 0.5rem;
    padding: 0.45rem 1.5rem;
}
.parade-unlock-close-btn:focus-visible,
.parade-unlock-close-btn:hover {
    background: var(--twilight-hover);
    outline: 2px solid var(--theme);
    outline-offset: 3px;
}
.parade-unlock-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, var(--theme-subtle), var(--theme), var(--theme-subtle));
    box-shadow: 0 0 8px var(--theme-glow);
    animation: paradeProgressShrink 5s linear 0.3s both;
    transform-origin: left;
}
@keyframes paradeProgressShrink {
    from { transform: scaleX(1); }
    to   { transform: scaleX(0); }
}

/* ── 設定画面内 Parade モードノーティス ─────────────── */
.parade-notice {
    margin-top: 1rem;
    padding: 0.7rem 1rem;
    border: 1px solid var(--theme-dim);
    border-radius: 6px;
    background: var(--theme-subtle);
    text-align: center;
    animation: noticeIn 0.4s ease both;
}
@keyframes noticeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}
.parade-notice-text {
    font-size: 0.75rem;
    color: var(--theme);
    letter-spacing: 0.05em;
    line-height: 1.6;
}

.debug-result-btn:focus-visible {
    outline: 2px solid rgba(255, 100, 100, 0.6);
    outline-offset: 2px;
}

.app-version {
    font-size: 0.72rem;
    color: var(--theme);
    opacity: 0.45;
    letter-spacing: 0.05em;
    margin: 4px 0 0;
}

/* ── 遊び方画面 ──────────────────────────────── */
.how-to-play-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.how-to-play-content {
    width: 100%;
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.how-to-play-screen .settings-header {
    text-align: center;
    color: var(--twilight-text);
}

.how-to-play-section {
    padding: 1rem 1.2rem;
    border: 1px solid var(--twilight-border);
    border-radius: 6px;
    background: var(--twilight-subtle);
}

.how-to-play-section-title {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--twilight-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.how-to-play-section-body {
    font-size: 0.85rem;
    color: var(--twilight-text);
    line-height: 1.7;
}

.how-to-play-difficulty-list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.25rem 0.7rem;
    font-size: 0.85rem;
    color: var(--twilight-text);
    line-height: 1.7;
}

.how-to-play-back-btn {
    align-self: center;
    margin-top: 0.5rem;
    background: none;
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 0.45rem 2rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    transition: background 0.15s;
}

.how-to-play-back-btn:hover {
    background: var(--twilight-hover);
}

/* ── Start画面 下部ボタン横並び ─────────────── */
.start-bottom-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
    margin-top: 1.5rem;
}

.start-bottom-buttons .settings-open-btn {
    margin-top: 0;
}

.how-to-play-btn {
    background: none;
    border: 1px solid var(--twilight-border);
    color: var(--twilight-text);
    padding: 0.5rem 2rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    transition: background 0.2s;
}

.how-to-play-btn:hover {
    background: var(--twilight-subtle);
}