/* --- 基本設定 --- */
:root {
    --primary-color: #3498db; /* 主題色 (不變) */
    --light-blue-color: #eaf5ff; /* <<< 新增：按鈕用的淡藍色 */
    --dark-color: #333333;    /* 清晰的深灰色 (不變) */
    --light-color: #ecf0f1;   /* 淺色背景 (不變) */
    --white-color: #ffffff;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', 'Arial', '微軟正黑體', sans-serif;
    line-height: 1.6;
    background-color: var(--white-color);
    color: var(--dark-color);
}

/* --- 通用樣式 --- */
h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: 1rem;
}

h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
}

section {
    padding: 4rem 2rem;
}

/* --- 導覽列 --- */
header {
    background: var(--white-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

/* ========= 導覽列突出按鈕的樣式 (顏色修改) ========= */
.cta-nav-button {
    padding: 8px 20px;
    background-color: var(--light-blue-color); 
    color: var(--dark-color);                   
    text-decoration: none;
    font-weight: bold;
    border-radius: 8px;
    border: 1px solid #d0e0f0;                  
    box-shadow: none;                           
    transition: all 0.2s ease-in-out;
    display: inline-block;
}

/* ▼▼▼ 主要修改處 ▼▼▼ */
/* 修改 hover 效果，移除顏色變化，只保留浮動與陰影效果 */
.cta-nav-button:hover {
    transform: translateY(-3px); /* 讓按鈕向上浮動一點點 */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15); /* 加上更明顯的陰影，增強立體感 */
    /* 已將 background-color, color, border-color 的改變移除 */
}
/* ▲▲▲ 主要修改處 ▲▲▲ */

.cta-nav-button:active {
    transform: translateY(1px);
    background-color: #2980b9;
    box-shadow: none;
}
/* =============================================== */

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
}

.nav-links li {
    padding: 0 1rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: bold;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

main {
    padding-top: 80px; 
}

/* --- 主要介紹區 (Hero) --- */
#hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url(hero-background.jpg) no-repeat center center/cover;
    height: 90vh;
    color: var(--white-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

#hero h1 {
    font-size: 3.5rem;
}

#hero p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: var(--white-color);
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.cta-button:hover {
    background: #2980b9; 
}

/* --- 關於我 --- */
#about {
    background: var(--light-color);
}
.about-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.profile-pic {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--primary-color);
    margin-bottom: 1.5rem;
}
.about-container p {
    font-size: 18px; 
    line-height: 1.8;
}

/* --- 技能 --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
.skill-item {
    background: var(--light-color);
    padding: 2rem;
    text-align: center;
    border-radius: 10px;
    transition: transform 0.3s ease;
}
.skill-item:hover {
    transform: translateY(-10px);
}
.skill-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* --- 作品集 --- */
#portfolio {
    background: var(--light-color);
}
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}
.portfolio-item {
    background: var(--white-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}
.portfolio-item:hover {
    transform: scale(1.05);
}
.portfolio-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}
.portfolio-info {
    padding: 1.5rem;
}
.portfolio-info a {
    display: inline-block;
    margin-top: 1rem;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: bold;
}

/* --- 聯絡我 --- */
#contact {
    text-align: center;
    background: var(--light-color);
}
.social-links {
    margin-top: 2rem;
}
.social-links a {
    color: var(--dark-color);
    font-size: 2.5rem;
    margin: 0 1rem;
    transition: color 0.3s ease;
}
.social-links a:hover {
    color: var(--primary-color);
}

/* --- 頁尾 --- */
footer {
    background: var(--dark-color);
    color: var(--light-color);
    text-align: center;
    padding: 2rem;
}

/* --- 手機版漢堡選單 --- */
.burger {
    display: none;
    cursor: pointer;
}
.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--dark-color);
    margin: 5px;
    transition: all 0.3s ease;
}

/* --- 響應式設計 (RWD) --- */
@media screen and (max-width: 768px) {
    body {
        overflow-x: hidden;
    }

    .nav-links {
        position: fixed;
        right: 0px;
        height: 92vh;
        top: 8vh;
        background-color: var(--white-color);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: space-around;
        width: 60%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        padding: 0;
    }
    .nav-links li {
        padding: 0;
    }

    .nav-links.nav-active {
        transform: translateX(0%);
    }
    .burger {
        display: block;
    }
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    /* 手機版漢堡選單中的「過勞儀表板」按鈕樣式 (這邊的樣式很棒，維持不變) */
    .nav-links .cta-nav-button {
        background: none;
        box-shadow: none;
        color: var(--primary-color);
        border: 2px solid var(--primary-color);
        border-radius: 30px;
        padding: 10px 20px;
    }

    .nav-links .cta-nav-button:hover {
        background-color: var(--primary-color);
        color: var(--white-color);
        transform: none; /* 手機版不需要浮動效果 */
        box-shadow: none; /* 同上 */
    }
    
    .nav-links .cta-nav-button:active {
        transform: none;
        box-shadow: none;
    }
}

/* --- 留言表單樣式 --- */
.form-container {
    max-width: 700px;
    margin: 0 auto;
    margin-top: 4rem;
    padding: 2rem;
    background: var(--white-color);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    text-align: left;
}

.form-container h3 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--dark-color);
}

.form-container p {
    margin-bottom: 1rem;
}

.form-container label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: var(--dark-color);
}

.form-container input,
.form-container textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.form-container button {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: var(--white-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    transition: background 0.3s ease;
}

.form-container button:hover {
    background: #2980b9;
}

/* ▼▼▼ 新增證書字號樣式 (已修改) ▼▼▼ */
.certificate-info {
    font-size: 1rem; /* 設定合適的字體大小 */
    margin: 0 0 1.5rem 0; /* 與下方的段落產生間距 */
    padding: 0;
    color: #555; /* 使用較柔和的顏色 */
}

.certificate-info a {
    color: inherit; /* 繼承父層的顏色 */
    text-decoration: none; /* 移除底線 */
    transition: color 0.3s ease, transform 0.3s ease; /* 加入 transform 的過渡效果 */
}

.certificate-info a:hover {
    color: var(--primary-color); /* 滑鼠懸停時變為主題色 */
    transform: translateY(-2px); /* 讓文字向上浮動 2px */
}
/* ▲▲▲ 新增證書字號樣式 (已修改) ▲▲▲ */