/* --- Color Variables --- */
:root {
    --color-primary-orange: #FF7A00; /* Vibrant Orange - Warm Accent */
    --color-secondary-purple: #6A0DAD; /* Deep Purple - Strong Accent */
    --color-light-bg: #F9F9F9; /* Off-White Background */
    --color-text-dark: #333333;
    --color-text-light: #FFFFFF;
    --color-accent-light: #FFC47A; /* Lighter Orange for hover/highlights */
    --color-border-light: #E0E0E0;
}

/* --- Global Styles & Typography --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    color: var(--color-text-dark);
    background-color: var(--color-light-bg);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-padding {
    padding: 60px 0;
}

.section-title {
    font-size: 2.2em;
    text-align: center;
    margin-bottom: 40px;
    color: var(--color-secondary-purple);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--color-primary-orange);
    margin: 10px auto 0;
    border-radius: 2px;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s, transform 0.2s;
    text-align: center;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary-orange);
    color: var(--color-text-light);
}

.btn-primary:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-secondary-purple);
    border-color: var(--color-secondary-purple);
}

.btn-secondary:hover {
    background-color: var(--color-secondary-purple);
    color: var(--color-text-light);
}

.btn-accent {
    background-color: var(--color-secondary-purple);
    color: var(--color-text-light);
}

.btn-accent:hover {
    background-color: var(--color-primary-orange);
    color: var(--color-text-light);
}


/* --- Header & Navigation --- */
.site-header {
    background-color: var(--color-text-light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-icon {
    color: var(--color-primary-orange);
    font-size: 1.5em;
    margin-right: 5px;
}

.logo-text {
    font-weight: 700;
    font-size: 1.2em;
    color: var(--color-secondary-purple);
}

.main-nav a {
    color: var(--color-text-dark);
    text-decoration: none;
    margin-left: 25px;
    font-weight: 500;
    transition: color 0.3s;
}

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

.menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    font-size: 1.8em;
    cursor: pointer;
    color: var(--color-secondary-purple);
}

.lang-toggle {
    font-weight: 700;
}

/* --- Hero Section --- */
.hero-section {
    background-color: var(--color-secondary-purple);
    color: var(--color-text-light);
    padding: 100px 0;
    text-align: center;
    /* Cultural Sign Subtlety: Subtle geometric pattern using CSS background */
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
}

.hero-content h1 {
    font-size: 3.5em;
    margin-bottom: 15px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.3em;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* --- Mission Section --- */
.mission-grid {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.mission-card {
    background-color: var(--color-text-light);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    flex: 1;
    min-width: 280px;
    text-align: center;
    border-top: 5px solid var(--color-primary-orange);
}

.mission-card .icon {
    font-size: 2.5em;
    color: var(--color-primary-orange);
    display: block;
    margin-bottom: 15px;
}

.mission-card h3 {
    color: var(--color-secondary-purple);
    margin-bottom: 10px;
}

/* --- Programs Section (Cultural Pattern Background) --- */
.section-bg-pattern {
    background-color: var(--color-light-bg);
    /* Cultural Sign Subtlety: A warmer, more distinct pattern for this section */
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 122, 0, 0.1) 10%, transparent 10%),
        radial-gradient(circle at 90% 80%, rgba(106, 13, 173, 0.1) 10%, transparent 10%),
        repeating-linear-gradient(45deg, var(--color-border-light) 0, var(--color-border-light) 1px, transparent 1px, transparent 10px);
    background-size: 40px 40px;
}

.program-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.program-item {
    background-color: var(--color-text-light);
    padding: 25px;
    border-left: 5px solid var(--color-primary-orange);
    border-radius: 5px;
    transition: box-shadow 0.3s;
}

.program-item:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.program-item h4 {
    color: var(--color-secondary-purple);
    margin-bottom: 5px;
}

/* --- Get Involved CTA --- */
.text-center {
    text-align: center;
}

.lead {
    font-size: 1.1em;
    margin-bottom: 30px;
    color: #555;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--color-secondary-purple);
    color: var(--color-text-light);
    padding: 40px 0 10px;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-grid div {
    flex: 1;
    min-width: 200px;
}

.footer-grid h4 {
    color: var(--color-primary-orange);
    margin-bottom: 15px;
    font-size: 1.2em;
}

.footer-grid p {
    margin-bottom: 8px;
}

.social-links a {
    display: inline-block;
    width: 35px;
    height: 35px;
    line-height: 35px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--color-text-light);
    text-decoration: none;
    border-radius: 50%;
    margin-right: 10px;
    font-weight: 700;
    transition: background-color 0.3s;
}

.social-links a:hover {
    background-color: var(--color-primary-orange);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    font-size: 0.9em;
    opacity: 0.7;
}

/* --- Responsive Design for Mobile Screens --- */
@media (max-width: 900px) {
    .hero-content h1 {
        font-size: 2.5em;
    }
    
    .section-padding {
        padding: 40px 0;
    }

    .mission-card {
        min-width: 100%;
    }
}

@media (max-width: 768px) {
    /* Navigation Toggle Logic */
    .main-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%; /* Positioned right below the header */
        left: 0;
        right: 0;
        background-color: var(--color-text-light);
        box-shadow: 0 8px 10px rgba(0, 0, 0, 0.1);
        padding: 15px 0;
        border-top: 1px solid var(--color-border-light);
    }

    .main-nav.active {
        display: flex;
    }

    .main-nav a {
        margin: 10px 20px;
        padding: 5px 0;
        border-bottom: 1px solid var(--color-border-light);
    }

    .main-nav a:last-child {
        border-bottom: none;
    }

    .menu-toggle {
        display: block; /* Show hamburger on mobile */
    }

    .header-content {
        padding: 0;
    }
    
    .logo-text {
        font-size: 1.1em;
    }

    /* Footer adjustments */
    .footer-grid {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-grid div {
        min-width: 100%;
    }

    .social-links {
        text-align: center;
        margin-top: 15px;
    }

    /* CTA adjustments */
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    .cta-buttons .btn {
        width: 80%;
        max-width: 300px;
    }
}