/* 全域樣式重置 ... (前面所有樣式都保持不變) ... */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: linear-gradient(135deg, #2a2a2a, #1a1a1a); color: #FFFFFF; font-family: sans-serif, "微軟正黑體"; padding: 20px; }
header { text-align: center; margin-bottom: 20px; }
header h1 { font-size: 28px; background-color: #3C3C3C; padding: 10px 20px; border-radius: 15px; display: inline-block; box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5); }
.profile-card { background-color: #3C3C3C; border-radius: 20px; padding: 20px; text-align: center; margin-bottom: 25px; box-shadow: 0 6px 12px rgba(0, 0, 0, 0.6); }
.profile-card img { width: 120px; height: 120px; border-radius: 50%; object-fit: cover; margin-bottom: 15px; border: 3px solid #FFFFFF; }
.profile-info p { font-size: 18px; line-height: 1.6; text-align: left; }
.section-title { text-align: center; margin-bottom: 15px; }
.social-links-container { }
.social-links { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 15px; }
.social-links a { position: relative; overflow: hidden; z-index: 1; display: flex; align-items: center; justify-content: center; padding: 12px; font-size: 18px; color: #FFFFFF; background-color: #4F4F4F; border-radius: 12px; text-decoration: none; transition: background-color 0.7s ease; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5); border: 0.5px solid #FFFFFF; }
.social-links a i { margin-right: 10px; }
.instagram::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(45deg, #F58529, #DD2A7B, #8134AF, #515BD4); opacity: 0; transition: opacity 0.5s ease; z-index: -1; }
.facebook:hover { background-color: #1877F2; }
.instagram:hover::before { opacity: 1; }
.threads:hover { background-color: #000000; }
.line:hover { background-color: #00C300; }
.youtube:hover { background-color: #c4302b; }
.github:hover { background-color: #24292e; }
footer { text-align: center; font-family: "Source Code Pro", monospace; margin-top: 30px; font-size: 14px; color: #BBBBBB; }

@media (min-width: 1024px) {
    .main-content { display: flex; justify-content: space-between; max-width: 1000px; margin: 0 auto; gap: 4%; }
    .profile-card, .social-links-container { flex-basis: 48%; margin-bottom: 0; display: flex; flex-direction: column; }
    .profile-card img { align-self: center; }
    .social-links-container { background-color: #3C3C3C; border-radius: 20px; padding: 20px; box-shadow: 0 6px 12px rgba(0, 0, 0, 0.6); }
    .social-links { flex-grow: 1; display: flex; flex-direction: column; justify-content: center; }
}


/* --- [新增] 導航菜單和按鈕樣式 --- */

/* 菜單按鈕樣式 */
#menu-toggle {
    position: fixed; /* 固定在視窗左上角 */
    top: 20px;
    left: 20px;
    z-index: 1001; /* 確保在最上層 */
    width: 50px;
    height: 50px;
    background-color: #3C3C3C;
    border: 1px solid #FFFFFF;
    border-radius: 12px;
    color: #FFFFFF;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    transition: background-color 0.3s ease;
}

#menu-toggle:hover {
    background-color: #4F4F4F;
}

/* 導航菜單面板 (預設在畫面左側外) */
#main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px; /* 菜單寬度 */
    height: 100vh; /* 菜單高度為整個視窗 */
    background: #1a1a1a;
    z-index: 1000;
    transform: translateX(-100%); /* 將其向左移出畫面 */
    transition: transform 0.5s cubic-bezier(0.77, 0, 0.175, 1); /* 平滑滑動動畫 */
    padding: 80px 20px 20px;
    display: flex;
    flex-direction: column;
}

/* 當導航菜單有 'menu-open' class 時，將其移回畫面內 */
#main-nav.menu-open {
    transform: translateX(0);
}

#main-nav ul {
    list-style: none; /* 移除項目符號 */
}

#main-nav ul li {
    margin-bottom: 20px;
}

/* 菜單內的連結樣式 */
#main-nav a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 24px;
    padding: 10px 15px;
    display: block;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

#main-nav a:hover {
    background-color: #3C3C3C;
}