/* --- CSS Reset & Basic Styles --- */
:root {
    /* 添付画像を参考にしたカラーパレット */
    --primary-color: #E63995; /* パッケージの濃いピンク */
    --secondary-color: #005BAC; /* ロゴのブルー */
    --light-pink: #FAD0E3; /* パッケージの薄いピンク */
    --accent-color: #F5A623; /* ポイントや達成感を示すオレンジ */
    --bg-color: #FFF7FA; /* 全体の背景色（ごく薄いピンク） */
    --text-color: #333;
    --light-gray: #E0E0E0;
    --white: #FFFFFF;
    --success-color: #4CAF50;
    --error-color: #F44336;
}

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&display=swap');

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 20px;
}

/* --- Game Container --- */
#game-container {
    width: 100%;
    max-width: 420px;
    background-color: var(--white);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* --- Header --- */
.header {
    background: linear-gradient(135deg, var(--light-pink), var(--primary-color));
    color: var(--white);
    padding: 20px;
    text-align: center;
}

.header h1 {
    font-size: 1.5em;
    margin-bottom: 10px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}

.points-display {
    background-color: rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    padding: 8px 16px;
    display: inline-block;
    font-size: 1.2em;
    font-weight: bold;
}

#points-value {
    margin-left: 8px;
}

.points-display::before {
    content: '🌟';
    margin-right: 5px;
}

/* --- Screens --- */
.screen {
    padding: 25px;
    display: none;
}

.screen.active {
    display: block;
}

.screen h2 {
    font-size: 1.4em;
    color: var(--primary-color);
    margin-bottom: 20px;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
}

/* --- Home Screen --- */
.action-menu {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.action-btn {
    background-color: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    padding: 18px;
    font-size: 1.1em;
    font-weight: bold;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    position: relative;
}

.action-btn .icon {
    font-size: 1.8em;
    margin-right: 15px;
    width: 40px;
    text-align: center;
}

.action-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(230, 57, 149, 0.3);
}

.action-btn.completed {
    background-color: var(--light-gray);
    border-color: var(--light-gray);
    color: #999;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.action-btn.completed::after {
    content: '✓ 達成';
    position: absolute;
    right: 15px;
    font-size: 0.9em;
    font-weight: bold;
    color: var(--success-color);
}

/* --- Articles Screen --- */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.article-item {
    display: block;
    text-decoration: none;
    color: var(--text-color);
    background-color: #fdf2f7;
    border-radius: 8px;
    padding: 15px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.article-item:hover {
    background-color: #fce8f1;
}

.article-item.read {
    background-color: #f0f0f0;
    color: #888;
    cursor: default;
    pointer-events: none;
}

.article-item.read::after {
    content: ' (閲覧済み)';
    font-size: 0.8em;
    color: var(--success-color);
}

/* --- Quiz Screen --- */
#quiz-question {
    font-size: 1.2em;
    margin-bottom: 20px;
    line-height: 1.6;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quiz-option {
    background-color: var(--white);
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    padding: 15px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.2s;
}

.quiz-option:hover {
    border-color: var(--primary-color);
}

.quiz-option.correct, .quiz-option.incorrect, .quiz-option.disabled {
    pointer-events: none;
}

.quiz-option.correct {
    background-color: #d4edda;
    border-color: var(--success-color);
    color: #155724;
    font-weight: bold;
}

.quiz-option.incorrect {
    background-color: #f8d7da;
    border-color: var(--error-color);
    color: #721c24;
}

#quiz-result {
    margin-top: 20px;
    font-size: 1.1em;
    font-weight: bold;
    text-align: center;
}

#next-question-btn {
    margin-top: 15px;
    display: none;
}

/* --- Survey Screen --- */
#survey-screen p {
    line-height: 1.7;
    margin-bottom: 25px;
}

/* --- Common Elements --- */
.btn {
    display: block;
    width: 100%;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    padding: 15px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    background-color: #c42a7a;
}

.btn.btn-back {
    background-color: var(--light-gray);
    color: var(--text-color);
    margin-top: 20px;
}

.btn.btn-back:hover {
    background-color: #ccc;
}

.btn.disabled {
    background-color: var(--light-gray);
    cursor: not-allowed;
    pointer-events: none;
}

/* --- Notification Modal --- */
#notification {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: var(--white);
    padding: 15px 25px;
    border-radius: 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    font-weight: bold;
    transition: bottom 0.5s ease-in-out;
    z-index: 1000;
}

#notification.show {
    bottom: 30px;
}

/* --- LIFF風モーダルのスタイル --- */
#liff-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

#liff-modal.show {
    display: flex;
}

.liff-modal-content {
    background-color: var(--white);
    width: 100%;
    height: 100%;
    max-width: 480px;
    max-height: 95vh;
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.liff-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background-color: #f1f1f1;
    border-bottom: 1px solid #ddd;
}

#liff-modal-title {
    font-size: 0.9em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#close-modal-btn {
    font-size: 1.5em;
    font-weight: bold;
    cursor: pointer;
    border: none;
    background: none;
    padding: 5px 10px;
}

#liff-iframe {
    width: 100%;
    height: 100%;
    border: none;
}