/* ============================================
   ORBITAL - 天体観測リズムゲーム スタイルシート
   ============================================ */

/* === CSS Variables === */
:root {
    /* カラーパレット - 宇宙テーマ */
    --bg-space: #0a0a1a;
    --bg-nebula: #12122a;
    --bg-deep: #1a1a3a;

    /* 星のカラー */
    --star-blue: #4fc3f7;
    --star-cyan: #00ffff;
    --star-gold: #ffd54f;
    --star-pink: #ff69b4;
    --star-purple: #9c27b0;

    /* 軌道カラー */
    --orbit-ul: #ff6b9d;
    /* 左上 - ピンク */
    --orbit-ur: #4fc3f7;
    /* 右上 - シアン */
    --orbit-dl: #69f0ae;
    /* 左下 - グリーン */
    --orbit-dr: #ffd54f;
    /* 右下 - ゴールド */

    /* 判定カラー */
    --perfect-color: #00ffff;
    --good-color: #ffd54f;
    --miss-color: #ff4444;

    /* テキスト */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* スペーシング */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    /* フォント */
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;

    /* トランジション */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* === Reset & Base === */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-body);
    background: var(--bg-space);
    color: var(--text-primary);
    line-height: 1.6;
}

#app {
    width: 100%;
    height: 100%;
    position: relative;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(156, 39, 176, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(79, 195, 247, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(0, 255, 255, 0.05) 0%, transparent 70%),
        linear-gradient(180deg, var(--bg-space) 0%, var(--bg-nebula) 100%);
}

/* === 画面管理 === */
.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: 1;
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

/* === タイトル画面 === */
.title-content {
    text-align: center;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-title {
    font-family: var(--font-display);
    margin-bottom: var(--spacing-md);
}

.title-orbital {
    font-size: 5rem;
    font-weight: 900;
    letter-spacing: 0.3em;
    background: linear-gradient(135deg, var(--star-cyan), var(--star-pink), var(--star-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    filter: drop-shadow(0 0 30px rgba(0, 255, 255, 0.5));
    animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {

    0%,
    100% {
        filter: drop-shadow(0 0 30px rgba(0, 255, 255, 0.5));
    }

    50% {
        filter: drop-shadow(0 0 50px rgba(0, 255, 255, 0.8));
    }
}

.subtitle {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 0.5em;
    margin-bottom: var(--spacing-xxl);
}

.title-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.key-hints {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.key-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.key-hint .key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--star-cyan);
}

.version {
    position: absolute;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    font-family: var(--font-display);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* === Orbital ボタン === */
.orbital-button {
    position: relative;
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    padding: var(--spacing-md) var(--spacing-xxl);
    border: 2px solid;
    background: transparent;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-normal);
    min-width: 250px;
    border-radius: 30px;
}

.orbital-button.primary {
    color: var(--star-cyan);
    border-color: var(--star-cyan);
    box-shadow:
        0 0 15px rgba(0, 255, 255, 0.3),
        inset 0 0 15px rgba(0, 255, 255, 0.1);
}

.orbital-button.primary:hover {
    background: rgba(0, 255, 255, 0.15);
    box-shadow:
        0 0 30px rgba(0, 255, 255, 0.5),
        inset 0 0 30px rgba(0, 255, 255, 0.2);
    transform: scale(1.05);
}

.orbital-button.secondary {
    color: var(--star-pink);
    border-color: var(--star-pink);
    box-shadow:
        0 0 15px rgba(255, 105, 180, 0.3),
        inset 0 0 15px rgba(255, 105, 180, 0.1);
}

.orbital-button.secondary:hover {
    background: rgba(255, 105, 180, 0.15);
    box-shadow:
        0 0 30px rgba(255, 105, 180, 0.5),
        inset 0 0 30px rgba(255, 105, 180, 0.2);
    transform: scale(1.05);
}

.orbital-button.large {
    font-size: 1.3rem;
    padding: var(--spacing-lg) var(--spacing-xxl);
    min-width: 300px;
}

/* === 画面ヘッダー === */
.screen-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    z-index: 10;
}

.back-button {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.back-button:hover {
    color: var(--star-cyan);
}

.back-button .arrow {
    font-size: 1.5rem;
}

.screen-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.2em;
}

/* === 楽曲選択画面 === */
.select-content {
    width: 100%;
    max-width: 800px;
    padding: var(--spacing-xxl);
    padding-top: 80px;
}

.select-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    justify-content: center;
}

.select-tab {
    font-family: var(--font-display);
    font-size: 0.9rem;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.select-tab:hover {
    border-color: rgba(255, 255, 255, 0.4);
}

.select-tab.active {
    border-color: var(--star-cyan);
    color: var(--star-cyan);
    background: rgba(0, 255, 255, 0.1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ドロップゾーン */
.drop-zone {
    border: 3px dashed rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: var(--spacing-xxl);
    text-align: center;
    transition: all var(--transition-normal);
    background: rgba(255, 255, 255, 0.02);
}

.drop-zone.dragover {
    border-color: var(--star-cyan);
    background: rgba(0, 255, 255, 0.05);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.2);
}

.drop-zone-content {
    pointer-events: none;
}

.drop-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.drop-text {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.drop-subtext {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.file-select-button {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--star-pink);
    border: 2px solid var(--star-pink);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 20px;
    cursor: pointer;
    pointer-events: auto;
    transition: all var(--transition-fast);
}

.file-select-button:hover {
    background: rgba(255, 105, 180, 0.1);
    box-shadow: 0 0 20px rgba(255, 105, 180, 0.3);
}

.supported-formats {
    margin-top: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* デモ譜面リスト */
.demo-charts {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.demo-chart-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.demo-chart-item:hover {
    border-color: var(--star-cyan);
    background: rgba(0, 255, 255, 0.1);
}

.demo-chart-item.selected {
    border-color: var(--star-cyan);
    background: rgba(0, 255, 255, 0.15);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

.chart-icon {
    font-size: 2.5rem;
}

.chart-info {
    flex: 1;
}

.chart-name {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.chart-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 選択された楽曲 */
.selected-song {
    margin-top: var(--spacing-xl);
    text-align: center;
    animation: fadeInUp 0.5s ease;
}

.selected-song.hidden {
    display: none;
}

.song-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    margin-bottom: var(--spacing-xl);
}

.song-artwork {
    width: 80px;
    height: 80px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--star-purple), var(--star-pink));
    display: flex;
    align-items: center;
    justify-content: center;
}

.artwork-placeholder {
    font-size: 2.5rem;
}

.song-details {
    text-align: left;
}

.song-name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.song-duration {
    color: var(--text-secondary);
}

/* === ライブラリ画面 === */
.library-content {
    width: 100%;
    max-width: 900px;
    padding: var(--spacing-xxl);
    padding-top: 80px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    height: 100%;
    overflow-y: auto;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    letter-spacing: 0.1em;
    color: var(--star-cyan);
    margin-bottom: var(--spacing-md);
}

.library-drop {
    padding: var(--spacing-lg);
}

.library-drop .drop-icon {
    font-size: 2.5rem;
    animation: none;
}

.library-songs {
    max-height: 300px;
    overflow-y: auto;
}

.library-songs::-webkit-scrollbar {
    width: 6px;
}

.library-songs::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.library-songs::-webkit-scrollbar-thumb {
    background: var(--star-pink);
    border-radius: 3px;
}

.library-empty,
.library-empty-msg {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.empty-hint {
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
    color: var(--star-pink);
}

/* ライブラリアイテム */
.library-item,
.song-library-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid transparent;
    border-radius: 10px;
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.library-item:hover,
.song-library-item:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.library-item.selected {
    border-color: var(--star-cyan);
    background: rgba(0, 255, 255, 0.1);
}

.library-item-icon,
.song-library-icon {
    width: 45px;
    height: 45px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--star-purple), var(--star-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.library-item-info {
    flex: 1;
    min-width: 0;
}

.library-item-name {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.library-item-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    gap: var(--spacing-md);
    margin-top: 2px;
}

.library-song-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.library-song-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.library-song-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.library-song-btn.delete:hover {
    background: rgba(255, 68, 68, 0.3);
    color: var(--miss-color);
}

/* === 曲選択画面のアイテム === */
.select-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.select-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 255, 255, 0.3);
}

.select-item.selected {
    background: rgba(0, 255, 255, 0.1);
    border-color: var(--star-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
}

.select-jacket {
    width: 70px;
    height: 70px;
    border-radius: 10px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--star-purple), var(--star-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 0 15px rgba(156, 39, 176, 0.3);
}

.select-jacket img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.jacket-placeholder-small {
    font-size: 1.8rem;
    color: rgba(255, 255, 255, 0.7);
}

.select-info {
    flex: 1;
    min-width: 0;
}

.select-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.select-artist {
    font-size: 0.9rem;
    color: var(--star-gold);
    margin-bottom: 2px;
}

.select-credit {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.select-duration {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* === ゲーム画面 === */
#game-screen {
    background: var(--bg-space);
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* デバッグオーバーレイ */
.debug-overlay {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.7);
    padding: var(--spacing-md);
    border-radius: 8px;
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--star-cyan);
}

.debug-overlay.hidden {
    display: none;
}

/* === オーバーレイ === */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 26, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.pause-content,
.loading-content {
    text-align: center;
}

.pause-title {
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--star-cyan);
    margin-bottom: var(--spacing-xl);
}

.pause-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

/* スピナー */
.orbital-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid rgba(0, 255, 255, 0.2);
    border-top-color: var(--star-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--star-cyan);
    letter-spacing: 0.3em;
    margin-bottom: var(--spacing-sm);
}

.loading-status {
    color: var(--text-secondary);
}

/* === リザルト画面 === */
.result-content {
    text-align: center;
    animation: fadeInUp 0.5s ease;
}

.result-title {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: 0.3em;
    margin-bottom: var(--spacing-xl);
    color: var(--star-cyan);
}

.result-rank {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--spacing-xl);
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 105, 180, 0.2));
    border: 3px solid var(--star-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.3);
}

.rank-letter {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--star-cyan), var(--star-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.result-stats {
    margin-bottom: var(--spacing-xl);
}

/* メインリザルト表示（大きく） */
.result-main {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.result-rank-big {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 105, 180, 0.2));
    border: 4px solid var(--star-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.4);
    animation: rankPulse 2s ease-in-out infinite;
}

@keyframes rankPulse {

    0%,
    100% {
        box-shadow: 0 0 40px rgba(0, 255, 255, 0.4);
    }

    50% {
        box-shadow: 0 0 60px rgba(0, 255, 255, 0.6);
    }
}

.rank-letter-big {
    font-family: var(--font-display);
    font-size: 6rem;
    font-weight: 900;
    color: var(--star-cyan);
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.8);
}

.result-score-big {
    text-align: center;
}

.score-number {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 900;
    color: var(--star-gold);
    display: block;
    letter-spacing: 0.1em;
    text-shadow: 0 0 20px rgba(255, 213, 79, 0.6);
}

.score-label {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 0.3em;
}

/* コンパクト統計表示 */
.result-stats-compact {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-lg);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-label {
    font-family: var(--font-display);
    color: var(--text-secondary);
}

.stat-value {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--star-cyan);
}

.result-details {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.detail-item {
    text-align: center;
}

.detail-label {
    font-family: var(--font-display);
    font-size: 0.8rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.detail-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.detail-item.perfect .detail-label,
.detail-item.perfect .detail-value {
    color: var(--perfect-color);
}

.detail-item.good .detail-label,
.detail-item.good .detail-value {
    color: var(--good-color);
}

.detail-item.miss .detail-label,
.detail-item.miss .detail-value {
    color: var(--miss-color);
}

.result-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* === 設定画面 === */
.settings-content {
    width: 100%;
    max-width: 600px;
    padding: var(--spacing-xxl);
    padding-top: 80px;
}

.setting-group {
    margin-bottom: var(--spacing-xl);
}

.setting-group-title {
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--star-pink);
    margin-bottom: var(--spacing-md);
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

input[type="range"] {
    width: 200px;
    height: 6px;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--star-cyan);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--star-cyan);
}

.slider-value {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--star-cyan);
    min-width: 60px;
    text-align: right;
}

.keybind-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.keybind-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.keybind-lane {
    color: var(--text-secondary);
}

.keybind-key {
    font-family: var(--font-display);
    color: var(--star-cyan);
}

/* 難易度ボタン */
.difficulty-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.difficulty-btn {
    flex: 1;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.difficulty-btn:hover {
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.08);
}

.difficulty-btn.active {
    border-color: var(--star-cyan);
    background: rgba(0, 255, 255, 0.15);
}

.diff-name {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.difficulty-btn.active .diff-name {
    color: var(--star-cyan);
}

.diff-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* トグルスイッチ */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.2);
    transition: var(--transition-fast);
    border-radius: 26px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: white;
    transition: var(--transition-fast);
    border-radius: 50%;
}

input:checked+.toggle-slider {
    background: var(--star-cyan);
}

input:checked+.toggle-slider:before {
    transform: translateX(24px);
}

/* === INFOリンク === */
.info-links {
    display: flex;
    gap: var(--spacing-md);
}

.info-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.info-link:hover {
    background: rgba(0, 255, 255, 0.1);
    border-color: var(--star-cyan);
    color: var(--star-cyan);
}

.info-icon {
    font-size: 1.2rem;
}

.info-text {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
}

/* === 免責文言 === */
.disclaimer-notice {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(255, 170, 0, 0.08);
    border: 1px solid rgba(255, 170, 0, 0.2);
    border-radius: 10px;
    text-align: center;
}

.disclaimer-ja {
    font-size: 0.85rem;
    color: var(--star-gold);
    margin-bottom: var(--spacing-sm);
}

.disclaimer-en {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* === ユーティリティ === */
.hidden {
    display: none !important;
}

/* === ゲーム画面 サイドパネル === */
.game-side-panel {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
}

.game-side-panel.left {
    left: 30px;
}

.game-side-panel.right {
    right: 40px;
    text-align: left;
    max-width: 300px;
}

/* 左側：大きなジャケット */
.game-jacket-full {
    width: 220px;
    height: 220px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--star-purple), var(--star-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow:
        0 0 40px rgba(156, 39, 176, 0.4),
        0 0 80px rgba(0, 255, 255, 0.2),
        0 20px 60px rgba(0, 0, 0, 0.5);
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.game-jacket-full img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.game-jacket-full .jacket-placeholder {
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.6);
}

.jacket-artist-overlay {
    margin-top: 15px;
    text-align: center;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* 右側：楽曲情報 */
.game-title-side {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
    letter-spacing: 0.05em;
}

.game-artist-side {
    font-size: 1.3rem;
    color: var(--star-gold);
    margin-bottom: 16px;
    font-weight: 500;
}

.game-credit-side {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.song-jacket {
    flex-shrink: 0;
}

.jacket-image {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--star-purple), var(--star-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(156, 39, 176, 0.3);
}

.jacket-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.jacket-placeholder {
    font-size: 1.8rem;
    color: rgba(255, 255, 255, 0.8);
}

.song-meta {
    min-width: 0;
    flex: 1;
}

.game-song-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.game-song-artist {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.game-song-credit {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* === 大きなジャケット表示（左側） === */
.song-jacket-large {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.jacket-image-large {
    width: 120px;
    height: 120px;
    border-radius: 15px;
    background: linear-gradient(135deg, var(--star-purple), var(--star-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(156, 39, 176, 0.5), 0 0 60px rgba(0, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.jacket-image-large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.jacket-image-large .jacket-placeholder {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.8);
}

/* === 右側テキスト表示 === */
.song-meta-right {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
}

.game-song-title-large {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    word-wrap: break-word;
    line-height: 1.2;
}

.game-song-artist-large {
    font-size: 1rem;
    color: var(--star-gold);
    margin-bottom: 4px;
    font-weight: 500;
}

.game-song-credit-large {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
    line-height: 1.4;
}

/* === レスポンシブ === */
@media (max-width: 768px) {
    .title-orbital {
        font-size: 3rem;
    }

    .key-hints {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .result-details {
        flex-wrap: wrap;
    }

    .keybind-display {
        grid-template-columns: 1fr;
    }

    .song-info-overlay {
        max-width: 280px;
        padding: var(--spacing-sm);
    }

    .jacket-image {
        width: 45px;
        height: 45px;
    }

    .game-song-title {
        font-size: 0.9rem;
    }

    .game-song-artist {
        font-size: 0.75rem;
    }
}