/* --- 全局基礎設定 --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans TC', sans-serif;
    background-color: #1a1a1a;
    background-image: 
        radial-gradient(circle, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.8) 100%),
        url('/bg.png'); 
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: #f0f0f0;
    line-height: 1.6;
    padding: 0 20px 40px 20px;
    padding-top: 100px; /* 留出導覽列空間 */
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

/* --- 頁面標題區 --- */
.page-header {
    text-align: center;
    margin-bottom: 30px;
}

.page-title {
    font-family: 'Press Start 2P', monospace; /* 套用 Minecraft 點陣字體 */
    font-size: 2.2rem;
    color: #ffaa00; /* 圖片橘黃色 */
    text-shadow: 4px 4px 0px #3E2723; /* 深咖啡色 3D 陰影 */
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    line-height: 1.4;
}

.page-subtitle {
    color: #aaaaaa;
    font-size: 1rem;
}

/* --- 加入與條款主要卡片區域 --- */
.join-card {
    background-color: #2e2e2e;
    border: 4px solid #000;
    box-shadow: 
        inset -4px -4px 0px #1a1a1a, 
        inset 4px 4px 0px #5c5c5c,
        0px 8px 16px rgba(0,0,0,0.6);
    padding: 30px;
    position: relative;
    margin-bottom: 30px;
}

/* 白名單提示框 */
.whitelist-notice {
    background-color: #151515;
    border: 2px dashed #ffff55;
    padding: 16px 20px;
    margin-bottom: 25px;
    color: #ffff55;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: inset 2px 2px 0px #000;
}

.whitelist-notice i {
    font-size: 1.5rem;
    color: #ffff55;
}

/* 條款標題與清單 */
.terms-title {
    font-size: 1.3rem;
    color: #ffffff;
    margin-bottom: 20px;
    border-bottom: 2px dashed #444444;
    padding-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.terms-list {
    list-style: none;
    padding: 0;
    margin-bottom: 30px;
}

.terms-list li {
    position: relative;
    padding-left: 36px;
    margin-bottom: 18px;
    font-size: 1.05rem;
    color: #dddddd;
    line-height: 1.7;
}

/* 條款數字圖示標籤 */
.terms-list li::before {
    content: attr(data-step);
    position: absolute;
    left: 0;
    top: 3px;
    width: 24px;
    height: 24px;
    background-color: #ffaa00;
    color: #000000;
    font-weight: bold;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #000;
    box-shadow: 2px 2px 0px #000;
}

/* 內部超連結樣式 */
.rules-link {
    color: #55ffff;
    text-decoration: none;
    font-weight: bold;
    border-bottom: 1px dashed #55ffff;
    padding-bottom: 2px;
    transition: color 0.2s, border-color 0.2s;
}

.rules-link:hover {
    color: #ffff55;
    border-color: #ffff55;
}

/* --- 內嵌 Google 表單容器 --- */
.form-wrapper {
    margin-top: 25px;
    border: 3px solid #000;
    box-shadow: inset 3px 3px 0px #000, 0px 4px 10px rgba(0,0,0,0.5);
    background-color: #151515;
    overflow: hidden;
}

.form-iframe {
    width: 100%;
    height: 750px;
    border: none;
    display: block;
}

/* --- Minecraft 3D 經典按鈕與動作區 --- */
.join-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 25px;
    border-top: 2px dashed #444444;
    padding-top: 25px;
}

.mc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: bold;
    font-size: 0.95rem;
    color: #ffffff;
    background-color: #4a4a4a;
    border: 3px solid #000;
    box-shadow: 
        inset -3px -3px 0px #2e2e2e, 
        inset 3px 3px 0px #8b8b8b;
    padding: 10px 20px;
    cursor: pointer;
    user-select: none;
    transition: all 0.1s ease;
    text-decoration: none;
}

.mc-btn-primary {
    background-color: #ffaa00;
    color: #000000;
    box-shadow: 
        inset -3px -3px 0px #9f6f00, 
        inset 3px 3px 0px #ffcf40;
}

.mc-btn-primary:hover {
    background-color: #ffbb22;
}

.mc-btn:active {
    box-shadow: 
        inset 3px 3px 0px #1a1a1a, 
        inset -3px -3px 0px #5c5c5c;
    transform: translateY(2px);
}

/* 頁尾 */
.footer {
    text-align: center;
    font-size: 0.85rem;
    color: #777777;
    margin-top: 50px;
    border-top: 1px solid #2e2e2e;
    padding-top: 20px;
}

/* 響應式調整 */
@media (max-width: 600px) {
    body {
        padding-top: 130px;
    }
    .page-title {
        font-size: 1.2rem;
    }
    .join-card {
        padding: 20px;
    }
    .form-iframe {
        height: 600px;
    }
    .mc-btn {
        width: 100%;
    }
}