:root {
    /* 自然生態色票 */
    --bg-paper: #F1F3F2;
    --text-primary: #3E3B39;
    --text-secondary: #757575;
    --accent-green: #6B8E23;
    --accent-soft-green: #A3C1AD;
    --accent-blue: #8FA4AE;
    --accent-brown: #8D7B68;
    --accent-flower: #D8A69E;
    --accent-alert: #D85C42;
    --border-color: rgba(255, 255, 255, 0.6);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans TC', sans-serif;
    background: linear-gradient(to bottom, #FAFAFA, #E8ECE9);
    color: var(--text-primary);
    line-height: 1.8;
    letter-spacing: 0.05em;
    position: relative;
    min-height: 100vh;
}

h1, h2, h3, .serif-font { font-family: 'Noto Serif TC', serif; }
.eng-script { font-family: 'Playfair Display', serif; font-style: italic; }

/* 導覽列：極度通透 */
.nature-nav {
    border-bottom: 1px solid rgba(255,255,255,0.4);
    background-color: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: 0 4px 30px rgba(0,0,0,0.01);
}

.nav-item {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 0.5rem 0.8rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
    cursor: pointer;
    border: 1px solid transparent;
    text-decoration: none; /* 針對 <a> 標籤 */
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.5);
    color: var(--accent-green);
    border-color: rgba(107, 142, 35, 0.3);
}

.nav-item.active {
    color: var(--accent-green);
    background-color: rgba(255, 255, 255, 0.6);
    font-weight: 600;
    border-color: rgba(107, 142, 35, 0.3);
    box-shadow: 0 2px 10px rgba(107, 142, 35, 0.05);
}

/* 透明信紙卡片 (核心容器) */
.stationery-card {
    background-color: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    padding: 3rem 2rem;
    box-shadow: 
        0 10px 40px -10px rgba(0, 0, 0, 0.03),
        inset 0 0 20px rgba(255, 255, 255, 0.5);
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    border-radius: 16px;
}
.stationery-card::before {
    content: '';
    position: absolute;
    top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 250px; height: 250px;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='50' cy='50' r='40' stroke='%236B8E23' stroke-width='1' opacity='0.05' stroke-dasharray='5 5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    pointer-events: none;
}

/* 經文金句卡片 */
.verse-card-highlight {
    background-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(107, 142, 35, 0.3);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.02);
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

/* 聖經瀏覽器與搜尋框 */
.bible-browser-container { margin-top: 2rem; }
.bible-book-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 12px;
}
.bible-book-item {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    padding: 10px; text-align: center; border-radius: 8px;
    cursor: pointer; transition: all 0.3s; font-size: 0.9rem; color: var(--text-secondary);
}
.bible-book-item:hover {
    border-color: var(--accent-green); color: var(--accent-green);
    transform: translateY(-2px); background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.chapter-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(50px, 1fr)); gap: 8px;
}
.chapter-item {
    background: rgba(163, 193, 173, 0.2);
    padding: 8px; text-align: center; border-radius: 6px;
    cursor: pointer; color: var(--accent-green); font-weight: bold; border: 1px solid transparent;
}
.chapter-item:hover { background: var(--accent-green); color: white; border-color: var(--accent-green); }

.search-box { display: flex; gap: 8px; margin-bottom: 1.5rem; max-width: 500px; margin-left: auto; margin-right: auto; }
.search-input {
    flex: 1; padding: 10px 20px;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 50px;
    outline: none; transition: all 0.3s;
    backdrop-filter: blur(4px);
}
.search-input:focus { border-color: var(--accent-green); background: rgba(255,255,255,0.9); box-shadow: 0 0 0 4px rgba(107, 142, 35, 0.1); }
.search-btn {
    background: var(--accent-green); color: white; border: none; padding: 0 20px;
    border-radius: 50px; cursor: pointer; transition: opacity 0.3s;
    box-shadow: 0 4px 10px rgba(107, 142, 35, 0.3);
}
.search-btn:hover { opacity: 0.9; transform: translateY(-1px); }

/* 一般按鈕 */
.nature-btn {
    background-color: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--accent-green); color: var(--accent-green);
    padding: 0.5rem 1.5rem; font-size: 0.9rem; letter-spacing: 0.1em;
    transition: all 0.3s ease; border-radius: 50px;
    display: inline-flex; align-items: center; gap: 0.5rem; cursor: pointer;
    backdrop-filter: blur(2px);
}
.nature-btn:hover { background-color: var(--accent-green); color: white; transform: translateY(-2px); box-shadow: 0 5px 15px rgba(107, 142, 35, 0.2); }

/* 經文按鈕 */
.scripture-btn { background-color: rgba(241, 248, 233, 0.6); border-color: #81C784; color: #33691e; }
.scripture-btn:hover { background-color: #33691e; color: white; }

/* 讀經進度按鈕 (專屬樣式) */
.reading-plan-btn {
    background-color: white;
    border: 1px solid rgba(107, 142, 35, 0.2);
    color: #3E3B39;
    padding: 1rem;
    border-radius: 16px;
    text-align: left;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 4px;
    height: 100%;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0,0,0,0.02);
}
.reading-plan-btn:hover {
    border-color: var(--accent-green);
    background-color: rgba(107, 142, 35, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(107, 142, 35, 0.1);
}
.reading-plan-btn .label {
    font-size: 0.7rem;
    color: var(--accent-green);
    font-weight: bold;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.reading-plan-btn .content {
    font-size: 1.1rem;
    font-family: 'Noto Serif TC', serif;
    font-weight: 600;
}
.reading-plan-btn i {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    opacity: 0.1;
    width: 24px;
    height: 24px;
    color: var(--accent-green);
}

/* 通用卡片 (透明化) */
.clean-card {
    background: rgba(255, 255, 255, 0.3); backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.6); padding: 2rem;
    transition: all 0.4s ease; height: 100%; display: flex; flex-direction: column; border-radius: 16px;
}
.clean-card:hover {
    border-color: var(--accent-blue); transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.7);
    box-shadow: 0 15px 30px rgba(143, 164, 174, 0.15);
}

.date-badge {
    font-family: 'Playfair Display', serif; color: var(--accent-brown); font-size: 0.85rem; letter-spacing: 0.1em;
    text-transform: uppercase; border: 1px solid var(--border-color); padding: 2px 14px; border-radius: 20px;
    display: inline-block; margin-bottom: 0.5rem; background: rgba(255, 255, 255, 0.6);
}

.must-read-badge {
    background-color: var(--accent-alert); color: white; font-size: 0.75rem; padding: 2px 12px;
    border-radius: 15px; display: inline-flex; align-items: center; gap: 4px;
    box-shadow: 0 2px 8px rgba(216, 92, 66, 0.3); animation: pulse-slow 3s infinite;
}
@keyframes pulse-slow { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.05); opacity: 0.9; } }

.divider-water {
    height: 10px; background-image: url("data:image/svg+xml,%3Csvg width='40' height='10' viewBox='0 0 40 10' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 5 Q 10 0 20 5 T 40 5' stroke='%23D6D2CC' fill='none' opacity='0.5' /%3E%3C/svg%3E");
    background-repeat: repeat-x; margin: 2rem 0; width: 100%;
}

.fade-in { animation: fadeIn 0.8s ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
.hidden { display: none; }

.framed-image {
    padding: 10px; background: rgba(255,255,255,0.9); border: 1px solid rgba(255,255,255,0.6); border-radius: 2px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05); transform: rotate(1deg);
}

/* Chaplain Styles */
.chaplain-tab-btn {
    padding: 0.75rem 1.5rem;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s;
    cursor: pointer;
    white-space: nowrap;
}
.chaplain-tab-btn.active {
    color: var(--accent-green);
    border-bottom-color: var(--accent-green);
}
.emotion-group {
    margin-bottom: 1.2rem;
}
.emotion-group-title {
    font-size: 0.85rem;
    color: #8D7B68;
    margin-bottom: 0.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}
.emotion-group-title::before {
    content: '';
    width: 4px;
    height: 14px;
    background-color: var(--accent-green);
    border-radius: 2px;
}
.emotion-chip {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--accent-blue);
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 4px;
    cursor: pointer;
    transition: all 0.2s;
}
.emotion-chip:hover, .emotion-chip.selected {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}
/* Custom colors for emotion types */
.emotion-chip.positive:hover, .emotion-chip.positive.selected { background: #81C784; border-color: #81C784; }
.emotion-chip.neutral:hover, .emotion-chip.neutral.selected { background: #90A4AE; border-color: #90A4AE; }
.emotion-chip.negative:hover, .emotion-chip.negative.selected { background: #E57373; border-color: #E57373; }

.form-input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid rgba(141, 123, 104, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.5);
    margin-bottom: 1rem;
    outline: none;
    transition: border-color 0.3s;
}
.form-input:focus {
    border-color: var(--accent-green);
    background: rgba(255, 255, 255, 0.8);
}
.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #5d4037;
    font-size: 0.95rem;
}

.prayer-item-card {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 0.8rem;
    transition: all 0.2s;
    position: relative;
}
.prayer-item-card.answered {
    background: rgba(107, 142, 35, 0.1);
    border-color: var(--accent-green);
}
.prayer-status-badge {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    display: inline-block;
    margin-bottom: 4px;
}

/* Filter Button Styles */
.filter-btn {
    font-size: 0.85rem;
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid rgba(107, 142, 35, 0.2);
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.filter-btn:hover { background: rgba(107, 142, 35, 0.1); }
.filter-btn.active {
    background: var(--accent-green);
    color: white;
    border-color: var(--accent-green);
}

/* Flip Card Styles for Trivia */
.flip-card {
    background-color: transparent;
    width: 100%;
    height: 400px;
    perspective: 1000px;
    cursor: pointer;
}
.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}
.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}
.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.6);
}
.flip-card-front {
    background: rgba(255, 255, 255, 0.8);
    color: #3E3B39;
}
.flip-card-back {
    background: #6B8E23;
    color: white;
    transform: rotateY(180deg);
}

/* Quiz Styles */
.quiz-option {
    transition: all 0.2s;
    border: 1px solid transparent;
}
/* 修正：僅在支援 hover 的裝置（如電腦）上顯示懸停效果 */
@media (hover: hover) {
    .quiz-option:hover:not(:disabled) {
        background-color: rgba(107, 142, 35, 0.1);
        border-color: var(--accent-green);
    }
}
.quiz-option.correct {
    background-color: #d1fae5; /* green-100 */
    border-color: #10b981; /* green-500 */
    color: #065f46;
}
.quiz-option.wrong {
    background-color: #fee2e2; /* red-100 */
    border-color: #ef4444; /* red-500 */
    color: #991b1b;
}
.quiz-progress-bar {
    transition: width 1s linear;
}

/* Modal */
#bible-modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(60, 60, 58, 0.4); backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100; display: none; justify-content: center; align-items: center;
}
#bible-modal.show { display: flex; }
.modal-content {
    background: rgba(255, 252, 248, 0.98); width: 90%; max-width: 700px; max-height: 85vh;
    border-radius: 12px; padding: 2.5rem; overflow-y: auto; position: relative;
    box-shadow: 0 25px 60px rgba(0,0,0,0.15); border: 1px solid rgba(255,255,255,0.8);
}
.close-modal { position: absolute; top: 1.5rem; right: 1.5rem; cursor: pointer; color: #8d6e63; transition: transform 0.2s; }
.close-modal:hover { transform: rotate(90deg); }
.verse-text { font-family: 'Noto Serif TC', serif; line-height: 2.2; margin-bottom: 0.8rem; color: #2c1810; font-size: 1.05rem; }
.verse-num { color: var(--accent-green); font-size: 0.75em; margin-right: 0.8em; vertical-align: super; font-weight: bold; opacity: 0.8; }
.search-result-item { padding: 12px; border-bottom: 1px solid rgba(0,0,0,0.05); cursor: pointer; transition: background 0.2s; }
.search-result-item:hover { background: rgba(107, 142, 35, 0.08); border-radius: 4px; }