/* ========================================
   基本設定
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #FF6B6B;
    --secondary-color: #4ECDC4;
    --background-color: #F7FFF7;
    --text-color: #2C3E50;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
}

body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   画面切り替え
======================================== */
.screen {
    display: none;
    min-height: 100vh;
    padding: 20px;
}

.screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   スタート画面
======================================== */
#start-screen .logo {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 10px;
}

#start-screen .subtitle {
    font-size: 1.5rem;
    color: var(--text-color);
    text-align: center;
    margin-bottom: 20px;
}

#start-screen .description {
    font-size: 1rem;
    color: #666;
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.8;
}

/* ========================================
   ボタン
======================================== */
.btn {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 10px auto;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--card-shadow);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #FF5252;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(255, 107, 107, 0.3);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #45B8B0;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(78, 205, 196, 0.3);
}

.btn-share {
    background-color: #4267B2;
    color: white;
}

.btn-share:hover {
    background-color: #365899;
    transform: translateY(-2px);
}

/* ========================================
   ゲーム画面
======================================== */
.game-header {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    box-shadow: var(--card-shadow);
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: #E0E0E0;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
    width: 0%;
}

.question-count {
    font-size: 1rem;
    color: #666;
    text-align: center;
    margin-bottom: 5px;
}

.score {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    text-align: center;
}

.question-box {
    background: white;
    padding: 30px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    box-shadow: var(--card-shadow);
}

.question-text {
    font-size: 1.3rem;
    font-weight: bold;
    text-align: center;
    color: var(--text-color);
}

/* ========================================
   人物グリッド
======================================== */
.people-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

.person-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    position: relative;
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(135deg, #FF6B6B, #4ECDC4) border-box;
}

.person-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.person-card:active {
    transform: scale(0.98);
}

.person-card.selected {
    border: 3px solid var(--primary-color);
    transform: scale(1.05);
    box-shadow: 0 15px 50px rgba(255, 107, 107, 0.4);
}

.person-card.correct {
    border: 3px solid #4CAF50;
    animation: pulse-correct 0.6s ease;
    box-shadow: 0 15px 50px rgba(76, 175, 80, 0.4);
}

.person-card.incorrect {
    border: 3px solid #F44336;
    opacity: 0.6;
    filter: grayscale(50%);
}

.person-card.ai-choice {
    border: 3px solid var(--secondary-color);
    box-shadow: 0 15px 50px rgba(78, 205, 196, 0.4);
}

.person-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    display: block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
}

.person-info {
    padding: 15px;
    background: linear-gradient(to top, rgba(255,255,255,1), rgba(249,249,249,1));
}

.person-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 8px;
}

.person-category {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 10px;
}

.person-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 0.75rem;
    border-radius: 12px;
    font-weight: 500;
}

.person-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.95);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.person-badge.you {
    color: var(--primary-color);
}

.person-badge.ai {
    color: var(--secondary-color);
}

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

/* ========================================
   フィードバック
======================================== */
.feedback {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--card-shadow);
}

.feedback.hidden {
    display: none;
}

#feedback-text {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.feedback.correct #feedback-text {
    color: #4CAF50;
}

.feedback.incorrect #feedback-text {
    color: #F44336;
}

/* ========================================
   結果画面
======================================== */
.result-title {
    font-size: 2rem;
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.result-box {
    background: white;
    padding: 40px 20px;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 30px;
    box-shadow: var(--card-shadow);
}

.result-label {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 10px;
}

.result-percentage {
    font-size: 4rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.result-message {
    font-size: 1.2rem;
    color: var(--text-color);
    line-height: 1.8;
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

.stat-item {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--card-shadow);
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* ========================================
   アニメーション
======================================== */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.person-card {
    animation: slideIn 0.4s ease;
}

.person-card:nth-child(1) { animation-delay: 0s; }
.person-card:nth-child(2) { animation-delay: 0.1s; }
.person-card:nth-child(3) { animation-delay: 0.2s; }
.person-card:nth-child(4) { animation-delay: 0.3s; }

/* ========================================
   レスポンシブ
======================================== */
@media (max-width: 480px) {
    #start-screen .logo {
        font-size: 2.5rem;
    }

    #start-screen .subtitle {
        font-size: 1.2rem;
    }

    #start-screen .description {
        font-size: 0.9rem;
        padding: 0 10px;
    }

    .question-text {
        font-size: 1.1rem;
        padding: 0 10px;
    }

    .people-grid {
        gap: 12px;
    }

    .person-card {
        border-radius: 15px;
    }

    .person-info {
        padding: 12px;
    }

    .person-name {
        font-size: 0.9rem;
    }

    .person-category {
        font-size: 0.75rem;
    }

    .tag {
        font-size: 0.7rem;
        padding: 3px 8px;
    }

    .result-percentage {
        font-size: 3rem;
    }

    .btn {
        font-size: 1rem;
        padding: 12px 25px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 800px;
    }

    .people-grid {
        gap: 20px;
    }

    .person-card:hover {
        transform: translateY(-10px) scale(1.05);
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 900px;
    }

    .people-grid {
        gap: 25px;
    }
}