/* --- Global Styles --- */
:root {
    --primary-green: #3D5A45;
    --sage-green: #8FBC8F;
    --sand-bg: #F9F7F2;
    --text-color: #333;
    --white: #ffffff;
    --accent-blue: #4682B4;
    --youtube-red: #cc0000;
}

body {
    margin: 0;
    font-family: 'Montserrat', sans-serif;
    background-color: var(--sand-bg);
    color: var(--text-color);
    line-height: 1.6;
}

/* --- Navigation --- */
header {
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.logo {
    height: 50px;
    display: flex;
    align-items: center;
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    color: var(--primary-green);
    font-size: 1.2rem;
    text-decoration: none;
}
.logo img { height: 100%; margin-right: 10px; }

nav a {
    margin-left: 25px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 400;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color 0.3s;
}
nav a:hover { color: var(--sage-green); }

/* 當前頁面連結樣式 (由 HBS Helper 控制) */
nav a.active-link {
    color: var(--sage-green);
    font-weight: bold;
}

/* --- Footer --- */
footer {
    background-color: #f0ede6;
    padding: 50px 5%;
    text-align: center;
    border-top: 1px solid #ddd;
    margin-top: auto; /* 確保 footer 推到底部 */
}

/* --- Mobile Menu (RWD) --- */
.menu-toggle {
    display: none;
    font-size: 1.8rem;
    color: var(--primary-green);
    cursor: pointer;
    background: none;
    border: none;
    padding: 10px;
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    
    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        border-top: 1px solid #eee;
    }
    
    nav.active { display: flex; }
    
    nav a {
        margin: 15px 0;
        margin-left: 0;
        width: 100%;
        text-align: center;
        font-size: 1rem;
    }
}