:root {
    --bg-color: #050505;
    --accent-color: #00f2ff;
    --secondary-accent: #7000ff;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --nav-height: 80px;
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Noto Sans TC', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 導覽列樣式 */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    z-index: 1000;
    transition: var(--transition-slow);
    background: transparent;
}

#navbar.scrolled {
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    height: 70px;
}

#navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 2px;
}

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

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
}

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

.menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero 區塊 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(rgba(5, 5, 5, 0.7), rgba(5, 5, 5, 0.7)), url('hero_background.png');
    background-size: cover;
    background-position: center;
    text-align: center;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(90deg, var(--accent-color), var(--secondary-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

/* 按鈕樣式 */
.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-slow);
    cursor: pointer;
    display: inline-block;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-color);
    border: 2px solid var(--accent-color);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent-color);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--glass-border);
}

.btn-outline:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 樣式通用 */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.underline {
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 0 auto;
    border-radius: 2px;
}

/* 毛玻璃卡片 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

/* 關於我 */
.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 2rem;
}

.skill-tag {
    background: var(--glass-bg);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.skill-tag:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-5px);
}

/* 作品集 */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    height: 400px;
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    background: #1a1a1a; /* 佔位背景 */
}

.glass-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: rgba(5, 5, 5, 0.6);
    backdrop-filter: blur(15px);
    border-top: 1px solid var(--glass-border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: var(--transition-slow);
    opacity: 0;
}

.project-card:hover .glass-overlay {
    height: 100%;
    opacity: 1;
}

.project-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project-link {
    margin-top: 1rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
}

/* 聯絡區塊 */
.contact-card {
    padding: 4rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.social-links {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.social-links a:hover {
    color: var(--accent-color);
    transform: scale(1.2);
}

/* 頁尾 */
footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 動態效果預設 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 響應式 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    .nav-links {
        display: none;
    }
    .menu-btn {
        display: block;
    }
}