/* Modern Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@400;500;700&family=Sarabun:wght@400;500;700&display=swap');

:root {
    --bg-color: #FAF5FF; /* fuchsia-50 */
    --surface-color: #FFFFFF;
    --primary-color: #701A75; /* fuchsia-900 */
    --secondary-color: #F5D0FE; /* fuchsia-200 */
    --accent-color: #FDF4FF; /* fuchsia-50 */
    --text-main: #1C1917; /* Stone-900 */
    --text-muted: #57534E; /* Stone-600 */
    --font-heading: 'Outfit', 'Sarabun', sans-serif;
    --font-body: 'Inter', 'Sarabun', sans-serif;
    --max-width: 800px; /* Optimal reading width */
    --nav-height: 80px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-lg: 24px;
    --radius-md: 12px;
    --bg-pattern: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 86c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm28-65c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm23-11c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm-6 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm29 21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM32 34c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM46 69c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448 1 1 1zm-34-9c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448 1 1 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}

/* ... existing reset ... */

/* Language Switcher */
.lang-switch {
    display: flex;
    gap: 0;
    font-weight: 600;
    font-size: 0.85rem;
    border: 1px solid rgba(112, 26, 117, 0.2);
    border-radius: 100px;
    padding: 2px;
    background: rgba(255, 255, 255, 0.5);
}

.lang-switch a {
    color: var(--text-muted);
    padding: 4px 12px;
    border-radius: 100px;
    text-decoration: none;
}

.lang-switch a.active {
    color: #FFF;
    background-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}


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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(245, 208, 254, 0.15) 0, transparent 50%), 
        radial-gradient(at 100% 0%, rgba(216, 180, 254, 0.15) 0, transparent 50%),
        var(--bg-pattern);
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.8;
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    animation: fadeIn 0.8s ease-out;
}

body.no-scroll {
    overflow: hidden;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    letter-spacing: -0.02em;
}

h1 { 
    font-size: clamp(2.5rem, 8vw, 4.5rem); 
    background: linear-gradient(135deg, var(--primary-color) 0%, #A21CAF 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
h2 { font-size: 2.25rem; margin-top: 3rem; }
h3 { font-size: 1.5rem; margin-top: 2rem; color: var(--text-main); }
h4 { font-size: 1.25rem; margin-top: 1.5rem; font-weight: 600; }

p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

ul, ol {
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
    color: var(--text-muted);
}

strong {
    color: var(--text-main);
    font-weight: 600;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a:hover {
    color: var(--text-main);
}

/* Layout Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.wide-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
nav {
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    height: var(--nav-height);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(112, 26, 117, 0.1);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

nav.scrolled {
    background-color: rgba(255, 255, 255, 0.9);
    height: 70px;
}

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

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.75rem;
    color: var(--primary-color);
    letter-spacing: -0.04em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo::before {
    content: '✨';
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-muted);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
    background-color: rgba(112, 26, 117, 0.05);
}

/* Hero Section */
.hero {
    padding: 8rem 0 6rem;
    text-align: center;
    position: relative;
    background: linear-gradient(180deg, rgba(181, 201, 154, 0.1) 0%, rgba(250, 250, 249, 0) 100%);
}

.hero h1 {
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.hero p {
    font-size: 1.25rem;
    max-width: 650px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Content Pages */
.page-content {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin-top: 2rem;
    margin-bottom: 6rem;
    position: relative;
    overflow: hidden;
}

.page-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.page-content .container {
    padding: 4rem 3rem; 
}

/* Cards Grid (Landing Page) */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    padding: 2rem 0 6rem;
}

.topic-card {
    background: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(112, 26, 117, 0.05);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.topic-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(245, 208, 254, 0.1), transparent);
    pointer-events: none;
}

.topic-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.topic-card h3 {
    margin-top: 0;
    font-size: 1.5rem;
    color: var(--text-main);
}

.topic-card p {
    font-size: 1rem;
    flex-grow: 1;
}

.read-more {
    display: inline-flex;
    align-items: center;
    margin-top: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--primary-color);
    gap: 0.5rem;
}

.read-more::after {
    content: '→';
    transition: transform 0.3s ease;
}

.topic-card:hover .read-more::after {
    transform: translateX(8px);
}

/* Footer */
footer {
    padding: 6rem 0 4rem;
    text-align: center;
    border-top: 1px solid rgba(0,0,0,0.05);
    margin-top: auto;
    background: linear-gradient(to top, rgba(112, 26, 117, 0.03), transparent);
}

footer p {
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}

/* Mobile Nav */
.burger {
    display: none;
    cursor: pointer;
    z-index: 1001;
}

.burger div {
    width: 28px;
    height: 2px;
    background-color: var(--primary-color);
    margin: 6px;
    transition: all 0.3s ease;
}

/* Alerts and Highlights */
.highlight-box, .warning-box {
    padding: 2rem;
    border-radius: var(--radius-md);
    margin: 2.5rem 0;
    border: 1px solid transparent;
}

.highlight-box {
    background-color: var(--accent-color);
    border-left: 6px solid var(--primary-color);
    border-color: rgba(112, 26, 117, 0.1);
}

.warning-box {
    background-color: #FFF1F2;
    border-left: 6px solid #E11D48;
    border-color: rgba(225, 29, 72, 0.1);
}

/* Mobile Responsive */
@media screen and (max-width: 768px) {
    .nav-links {
        position: fixed;
        right: 0px;
        height: 100vh;
        top: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        display: flex;
        flex-direction: column;
        justify-content: center;
        width: 100%;
        transform: translateX(100%);
        transition: transform 0.5s cubic-bezier(0.77, 0.2, 0.05, 1);
        padding: 4rem 2rem;
        gap: 0.5rem;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        font-size: 1.5rem;
        display: block;
        padding: 1rem;
    }

    .burger {
        display: block;
    }
    
    .hero h1 {
        font-size: 3rem;
    }

    .nav-active {
        transform: translateX(0%);
    }

    .page-content .container {
        padding: 2.5rem 1.5rem;
    }

    .logo { font-size: 1.25rem; }
}

/* Animation */
/* @keyframes navLinkFade {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0px); }
} */

.toggle .line1 {
    transform: rotate(-45deg) translate(-5px, 6px);
}
.toggle .line2 {
    opacity: 0;
}
.toggle .line3 {
    transform: rotate(45deg) translate(-5px, -6px);
}