/* ダークモードとUI拡張のスタイル */

/* =========================================
   ダークモードの変数定義
   ========================================= */
:root {
    --transition-theme: 0.3s ease;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --success-color: #10b981;
    
    /* グラスモーフィズム効果 */
    --glass-bg: rgba(30, 41, 59, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* =========================================
   ダークモード時の要素スタイル
   ========================================= */
[data-theme="dark"] body {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: var(--text-primary);
}

[data-theme="dark"] .hero-header {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(20px);
}

[data-theme="dark"] .screen {
    background: rgba(30, 41, 59, 0.9);
    border-color: var(--border-color);
}

[data-theme="dark"] .question-card,
[data-theme="dark"] .result-card,
[data-theme="dark"] .setup-card {
    background: rgba(30, 41, 59, 0.95);
    border-color: var(--border-color);
}

[data-theme="dark"] .option {
    background: rgba(15, 23, 42, 0.6);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .option:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

[data-theme="dark"] .nav-item {
    background: rgba(15, 23, 42, 0.8);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .question-navigation {
    background: rgba(30, 41, 59, 0.95);
}

[data-theme="dark"] .category-breakdown,
[data-theme="dark"] .learning-stats {
    background: rgba(30, 41, 59, 0.8);
    border-color: var(--border-color);
}

[data-theme="dark"] .breakdown-item,
[data-theme="dark"] .stat-box {
    background: rgba(15, 23, 42, 0.8);
}

/* =========================================
   ヘッダーコントロールボタン
   ========================================= */
.header-controls {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 100;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .icon-btn {
    background: rgba(30, 41, 59, 0.9);
    border-color: var(--border-color);
}

.icon-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border-color: var(--primary-color);
}

.icon-btn:active {
    transform: translateY(0);
}

/* =========================================
   タイマー表示
   ========================================= */
.timer {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, #f59e0b, #f97316);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 4px 12px rgba(245, 158, 11, 0.5);
    }
}

/* =========================================
   問題アクションボタン
   ========================================= */
.question-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    justify-content: flex-end;
}

.action-btn {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.9);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all var(--transition-normal);
    position: relative;
}

[data-theme="dark"] .action-btn {
    background: rgba(30, 41, 59, 0.8);
    border-color: var(--border-color);
}

.action-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.action-btn.bookmarked {
    background: linear-gradient(135deg, #f59e0b, #f97316);
    border-color: #f59e0b;
}

.action-btn.bookmarked .bookmark-icon {
    animation: bookmarkPop 0.3s ease-out;
}

@keyframes bookmarkPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* =========================================
   グラスモーフィズム効果
   ========================================= */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .glass-effect {
    background: rgba(30, 41, 59, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* =========================================
   ニューモーフィズム効果
   ========================================= */
.neumorphism {
    background: linear-gradient(145deg, #ffffff, #f0f0f0);
    box-shadow: 
        8px 8px 16px rgba(163, 177, 198, 0.6),
        -8px -8px 16px rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] .neumorphism {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    box-shadow: 
        8px 8px 16px rgba(0, 0, 0, 0.5),
        -8px -8px 16px rgba(51, 65, 85, 0.3);
}

.neumorphism-inset {
    background: linear-gradient(145deg, #f0f0f0, #ffffff);
    box-shadow: 
        inset 5px 5px 10px rgba(163, 177, 198, 0.5),
        inset -5px -5px 10px rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] .neumorphism-inset {
    background: linear-gradient(145deg, #0f172a, #1e293b);
    box-shadow: 
        inset 5px 5px 10px rgba(0, 0, 0, 0.5),
        inset -5px -5px 10px rgba(51, 65, 85, 0.3);
}

/* =========================================
   スムーズなテーマ遷移
   ========================================= */
body,
.screen,
.hero-header,
.question-card,
.option,
.nav-item,
.btn-primary,
.btn-secondary,
.icon-btn,
.action-btn {
    transition: 
        background var(--transition-theme),
        color var(--transition-theme),
        border-color var(--transition-theme),
        box-shadow var(--transition-theme);
}

/* =========================================
   レスポンシブ対応
   ========================================= */
@media (max-width: 768px) {
    .header-controls {
        top: 0.5rem;
        right: 0.5rem;
        gap: 0.375rem;
    }
    
    .icon-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .question-actions {
        gap: 0.375rem;
    }
    
    .action-btn {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .header-controls {
        flex-wrap: wrap;
        width: auto;
    }
    
    .icon-btn {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }
    
    .timer {
        font-size: 0.75rem;
        padding: 0.2rem 0.5rem;
    }
}

/* =========================================
   アニメーション強化
   ========================================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

.animate-slideInRight {
    animation: slideInRight 0.6s ease-out;
}

.animate-scaleIn {
    animation: scaleIn 0.4s ease-out;
}

/* =========================================
   印刷スタイル
   ========================================= */
@media print {
    .header-controls,
    .question-navigation,
    .quiz-controls,
    .result-controls,
    .particles,
    .loading-screen {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .screen {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
        background: white !important;
    }
}

/* =========================================
   アクセシビリティ強化
   ========================================= */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-main:focus {
    top: 0;
}

/* フォーカス表示の強化 */
*:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 4px;
}

[data-theme="dark"] *:focus-visible {
    outline-color: var(--primary-light);
}

/* =========================================
   カスタムツールチップ
   ========================================= */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 0.5rem 0.75rem;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    font-size: 0.75rem;
    white-space: nowrap;
    border-radius: var(--radius-md);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    z-index: 1000;
}

[data-tooltip]:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

[data-theme="dark"] [data-tooltip]::after {
    background: rgba(255, 255, 255, 0.95);
    color: var(--bg-primary);
}