/* 漸層與毛玻璃主題設定 */
:root {
    --bg-gradient: linear-gradient(135deg, #e0f2fe 0%, #dcfce7 100%);
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.4);
    --text-color: #1f2937;
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
}

.dark {
    --bg-gradient: linear-gradient(135deg, #111827 0%, #064e3b 100%);
    --glass-bg: rgba(15, 23, 42, 0.75);
    --glass-border: rgba(255, 255, 255, 0.05);
    --text-color: #f8fafc;
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.7);
}

body {
    background: var(--bg-gradient);
    color: var(--text-color);
    transition: background 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* 毛玻璃共用類別 */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.4s ease;
}

.glass-panel:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.25);
}

/* 導覽列 */
.nav-fixed {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

/* 翻轉卡片設計 */
.flip-card {
    perspective: 1000px;
    width: 250px;
    height: 320px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card:hover .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: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    text-align: center;
}

.flip-card-back {
    transform: rotateY(180deg);
    background: rgba(74, 222, 128, 0.2);
    border: 1px solid rgba(74, 222, 128, 0.4);
}

/* 頭像圓形圖片 */
.member-img {
    width: 160px;
    height: 160px;
    object-fit: cover;
    border-radius: 50%;
    border: 5px solid #5f7c8d;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}


/* 懸浮按鈕 */
.floating-action {
    position: fixed;
    z-index: 99;
    transition: transform 0.3s, opacity 0.3s;
}

.floating-ad {
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.floating-top {
    right: 20px;
    bottom: 20px;
    opacity: 0;
    pointer-events: none;
}

.floating-top.show {
    opacity: 1;
    pointer-events: auto;
}

/* Modal 共用設定 */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(5px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

/* 讓所有段落文字自動左右對齊 */
p {
    text-align: justify;
    text-justify: inter-ideograph; /* 針對中文、日文等亞洲語系做優化的對齊方式 */
}