:root {
    --primary-color: #FF6B9D;
    --primary-dark: #E5527D;
    --secondary-color: #FFA07A;
    --success-color: #4ECDC4;
    --danger-color: #FF6B6B;
    --warning-color: #FFD93D;
    --purple: #A78BFA;
    --blue: #60A5FA;
    --green: #34D399;
    --pink: #F472B6;
    --orange: #FB923C;
    --bg-color: #FFF5F7;
    --card-bg: #ffffff;
    --text-primary: #2D3748;
    --text-secondary: #718096;
    --border-color: #FFE4EC;
    --shadow: 0 4px 6px rgba(255, 107, 157, 0.15);
    --shadow-lg: 0 10px 25px rgba(255, 107, 157, 0.25);
    --shadow-glow: 0 0 20px rgba(255, 107, 157, 0.3);
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: linear-gradient(135deg, #FF6B9D 0%, #FFA07A 50%, #FFD93D 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-primary);
    padding: 20px;
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(167, 139, 250, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    position: relative;
    z-index: 1;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* ヘッダー */
.header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    animation: bounceIn 0.8s ease-out;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.2);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.header-content i {
    font-size: 3rem;
}

.header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin: 0;
    color: white;
}

.subtitle {
    font-size: 1.2rem;
    margin-top: 15px;
    opacity: 0.95;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* カード */
.card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 107, 157, 0.1);
    animation: popIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--warning-color), var(--success-color));
    border-radius: 24px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 0.15;
}

.card h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}

.card h2 i {
    color: var(--primary-color);
}

.description {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 1.05rem;
}

/* 画面切り替え */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* 選択グループ */
.selection-group {
    margin-bottom: 30px;
}

.label-main {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.label-main i {
    color: var(--primary-color);
}

/* エクストラセクション */
.extra-section {
    margin-top: 40px;
    padding: 25px;
    border-top: 3px solid var(--warning-color);
    background: linear-gradient(135deg, #FFFDF7 0%, #FFF9E6 100%);
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.extra-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--warning-color);
    margin-bottom: 10px;
}

.extra-label i {
    color: var(--warning-color);
    font-size: 1.3rem;
}

.extra-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    padding-left: 5px;
}

.genre-grid-extra {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.genre-btn-extra {
    background: linear-gradient(135deg, #FFFFFF 0%, #FFFBF0 100%);
    border: 3px solid var(--warning-color);
    position: relative;
    padding-bottom: 30px;
}

.genre-btn-extra i {
    color: var(--warning-color);
}

.genre-btn-extra .extra-badge {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--warning-color);
    color: white;
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
}

.genre-btn-extra:hover {
    border-color: var(--warning-color);
    box-shadow: 0 0 20px rgba(255, 217, 61, 0.4);
}

.genre-btn-extra.selected {
    background: linear-gradient(135deg, var(--warning-color), var(--orange));
    color: white;
    border-color: var(--warning-color);
}

.genre-btn-extra.selected i {
    color: white;
}

.genre-btn-extra.selected .extra-badge {
    background: white;
    color: var(--warning-color);
}

/* ジャンルボタングリッド */
.genre-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
}

.genre-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 22px 15px;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--bg-color) 100%);
    border: 3px solid transparent;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    box-shadow: var(--shadow);
}

.genre-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.genre-btn:hover::before {
    opacity: 1;
}

.genre-btn i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.genre-btn:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: var(--shadow-glow);
}

.genre-btn:hover i {
    transform: scale(1.2) rotate(10deg);
}

.genre-btn.selected {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: transparent;
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.genre-btn.selected::before {
    opacity: 0;
}

.genre-btn.selected i {
    color: white;
    transform: scale(1.1);
}

/* 問題数ボタングリッド */
.number-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.number-btn {
    padding: 18px 10px;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--bg-color) 100%);
    border: 3px solid var(--border-color);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.number-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 107, 157, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.number-btn:hover {
    transform: scale(1.1) rotate(-3deg);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.number-btn:hover::after {
    width: 200px;
    height: 200px;
}

.number-btn.selected {
    background: linear-gradient(135deg, var(--primary-color), var(--pink));
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.08);
    box-shadow: var(--shadow-glow);
}

.number-btn.selected::after {
    opacity: 0;
}

/* ボタン */
.btn {
    padding: 18px 35px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    justify-content: center;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-glow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(-1px) scale(1.02);
}

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.5;
    transform: none;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--purple), var(--blue));
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 0 20px rgba(167, 139, 250, 0.4);
}

/* プログレスバー */
.progress-bar {
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50px;
    height: 12px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    background: linear-gradient(90deg, #4ECDC4, #FF6B9D);
    height: 100%;
    transition: width 0.4s ease;
    border-radius: 50px;
    box-shadow: 0 0 10px rgba(255, 107, 157, 0.3);
}

.progress-text {
    text-align: center;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

/* クイズカード */
.quiz-card {
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.btn-home {
    background: linear-gradient(135deg, var(--secondary-color), var(--pink));
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--shadow);
}

.btn-home:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

.genre-badge {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--pink));
    color: white;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: var(--shadow);
}

.question-text {
    font-size: 1.3rem;
    line-height: 1.8;
    margin-bottom: 30px;
    color: var(--text-primary);
    font-weight: 500;
}

/* 選択肢 */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.option-btn {
    padding: 20px;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--bg-color) 100%);
    border: 3px solid var(--border-color);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    text-align: left;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: var(--shadow);
    position: relative;
}

.option-label {
    background: linear-gradient(135deg, var(--primary-color), var(--pink));
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(255, 107, 157, 0.3);
}

.option-btn:hover:not(.disabled) {
    transform: translateX(8px) scale(1.02);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.option-btn.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #FFF5F7 0%, #FFE4EC 100%);
    box-shadow: var(--shadow-glow);
}

.option-btn.correct {
    border-color: var(--success-color);
    background: linear-gradient(135deg, #F0FDFA 0%, #CCFBF1 100%);
    animation: successPulse 0.6s ease-out;
}

.option-btn.correct .option-label {
    background: linear-gradient(135deg, var(--success-color), var(--green));
}

.option-btn.incorrect {
    border-color: var(--danger-color);
    background: linear-gradient(135deg, #FEF2F2 0%, #FEE2E2 100%);
    animation: shake 0.5s ease-out;
}

.option-btn.incorrect .option-label {
    background: linear-gradient(135deg, var(--danger-color), #DC2626);
}

.option-btn.disabled {
    cursor: not-allowed;
}

/* 解説 */
.explanation {
    margin-top: 20px;
    padding: 20px;
    background: #f8fafc;
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    animation: fadeIn 0.5s ease-out;
}

.explanation-title {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.explanation-text {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 結果画面 */
.result-card {
    text-align: center;
}

.result-header {
    margin-bottom: 30px;
}

.result-icon {
    font-size: 4rem;
    color: var(--warning-color);
    margin-bottom: 15px;
}

.score-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin: 40px 0;
}

.score-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), #764ba2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg);
}

.score-value {
    font-size: 3.5rem;
    font-weight: 700;
}

.percent-sign {
    font-size: 2rem;
}

.score-label {
    font-size: 1rem;
    margin-top: 5px;
    opacity: 0.9;
}

.score-details {
    display: flex;
    gap: 40px;
    font-size: 1.1rem;
}

.score-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.correct-icon {
    color: var(--success-color);
    font-size: 1.5rem;
}

.incorrect-icon {
    color: var(--danger-color);
    font-size: 1.5rem;
}

.result-message {
    font-size: 1.2rem;
    margin: 30px 0;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 12px;
    font-weight: 500;
}

/* 間違えた問題 */
.incorrect-questions {
    text-align: left;
    margin: 30px 0;
}

.incorrect-questions h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--danger-color);
    margin-bottom: 20px;
}

.incorrect-item {
    background: var(--bg-color);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 15px;
    border-left: 4px solid var(--danger-color);
}

.incorrect-genre {
    font-size: 0.85rem;
    color: var(--danger-color);
    font-weight: 600;
    margin-bottom: 10px;
}

.incorrect-question {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.incorrect-answer {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.user-answer {
    color: var(--danger-color);
}

.correct-answer {
    color: var(--success-color);
}

.incorrect-explanation {
    background: white;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 結果アクション */
.result-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.result-actions .btn {
    flex: 1;
}

/* フッター */
.footer {
    text-align: center;
    color: white;
    margin-top: 40px;
    padding: 20px;
    font-size: 0.9rem;
    opacity: 0.9;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-50px);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes shimmer {
    0% {
        background-position: 200% center;
    }
    100% {
        background-position: -200% center;
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

@keyframes successPulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(78, 205, 196, 0.7);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(78, 205, 196, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(78, 205, 196, 0);
    }
}

/* 結果マーク（○×表示） */
.result-mark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
    font-size: 8rem;
    font-weight: 700;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    animation: markPopIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    pointer-events: none;
}

.result-mark span {
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.result-mark.correct {
    color: var(--success-color);
}

.result-mark.correct i {
    animation: correctBounce 0.6s ease-out;
}

.result-mark.incorrect {
    color: var(--danger-color);
}

.result-mark.incorrect i {
    animation: incorrectShake 0.6s ease-out;
}

@keyframes markPopIn {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes correctBounce {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.3);
    }
    50% {
        transform: scale(0.9);
    }
    75% {
        transform: scale(1.1);
    }
}

@keyframes incorrectShake {
    0%, 100% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(-15deg);
    }
    75% {
        transform: rotate(15deg);
    }
}

/* レスポンシブ */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.8rem;
    }

    .card {
        padding: 25px;
    }

    .genre-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .genre-grid-extra {
        grid-template-columns: 1fr;
    }

    .number-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .score-circle {
        width: 160px;
        height: 160px;
    }

    .score-value {
        font-size: 2.5rem;
    }

    .score-details {
        flex-direction: column;
        gap: 15px;
    }

    .result-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 20px;
    }

    .genre-grid {
        grid-template-columns: 1fr;
    }

    .genre-grid-extra {
        grid-template-columns: 1fr;
    }

    .number-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .question-text {
        font-size: 1.1rem;
    }
}