:root {
            --primary-color: #222;
            --secondary-color: #444;
            --light-color: #f8f9fa;
            --white: #fff;
            --border-color: #eaeaea;
            --link-color: #0066cc;
            --hover-color: #004499;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --nav-bg: #1a1a1a;
            --nav-text: #f0f0f0;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--primary-color);
            background-color: var(--light-color);
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        /* ===== HERO SECTION ===== */
        .hero {
            text-align: center;
            margin: 30px 0 40px;
            position: relative;
        }
        
        .hero-image-container {
            max-width: 600px;
            margin: 0 auto 20px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .hero-image-container:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        
        .hero-image {
            width: 100%;
            height: auto;
            display: block;
            aspect-ratio: 1 / 1;
            object-fit: cover;
        }
        
        /* ===== NAVIGATION ===== */
        /* Desktop Navigation - DARK THEME */
        .desktop-nav {
            background-color: var(--nav-bg);
            border-radius: 12px;
            padding: 0 30px;
            margin-bottom: 40px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            position: sticky;
            top: 15px;
            z-index: 100;
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 80px;
        }
        
        .nav-logo-container {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .nav-logo {
            width: 50px;
            height: auto;
            object-fit: contain;
            transition: var(--transition);
        }
        
        .nav-logo:hover {
            transform: rotate(15deg);
        }
        
        .nav-brand {
            color: var(--white);
            font-size: 22px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 40px;
            flex-wrap: wrap;
        }
        
        .desktop-nav a {
            text-decoration: none;
            color: var(--nav-text);
            font-weight: 500;
            font-size: 16px;
            padding: 12px 0;
            position: relative;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .desktop-nav a::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: #0066cc;
            transition: width 0.3s ease;
            border-radius: 3px;
        }
        
        .desktop-nav a:hover {
            color: var(--white);
        }
        
        .desktop-nav a:hover::before {
            width: 100%;
        }
        
        .desktop-nav a[aria-current="page"] {
            color: #0066cc;
            font-weight: 600;
        }
        
        .desktop-nav a[aria-current="page"]::before {
            width: 100%;
            background-color: #0066cc;
        }
        
        /* Mobile Navigation - WHITE THEME */
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 32px;
            cursor: pointer;
            padding: 12px;
            color: var(--nav-bg);
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1001;
            background-color: var(--white);
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            transition: var(--transition);
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .hamburger:hover {
            background-color: #f5f5f5;
            transform: scale(1.05);
        }
        
        .hamburger.active {
            background-color: var(--nav-bg);
            color: var(--white);
        }
        
        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 85%;
            max-width: 350px;
            height: 100vh;
            background-color: var(--white);
            padding: 100px 30px 40px;
            box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
            z-index: 1000;
            transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
        }
        
        .mobile-nav.active {
            right: 0;
        }
        
        .mobile-nav-header {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            background-color: var(--nav-bg);
            padding: 20px 30px;
            display: flex;
            align-items: center;
            gap: 15px;
            border-bottom: 2px solid #0066cc;
        }
        
        .mobile-nav-logo {
            width: auto;
            height: 40px;
            object-fit: contain;
        }
        
        .mobile-nav-brand {
            color: var(--white);
            font-size: 20px;
            font-weight: 700;
        }
        
        .mobile-nav ul {
            list-style: none;
            margin-top: 20px;
        }
        
        .mobile-nav li {
            margin-bottom: 10px;
            border-radius: 8px;
            overflow: hidden;
            transition: var(--transition);
        }
        
        .mobile-nav li:hover {
            background-color: #f8f9fa;
        }
        
        .mobile-nav a {
            text-decoration: none;
            color: var(--primary-color);
            font-size: 18px;
            font-weight: 500;
            display: block;
            padding: 16px 20px;
            transition: var(--transition);
            border-left: 4px solid transparent;
        }
        
        .mobile-nav a:hover {
            color: var(--link-color);
            border-left-color: var(--link-color);
            padding-left: 25px;
        }
        
        .mobile-nav a[aria-current="page"] {
            background-color: #f0f7ff;
            color: var(--link-color);
            border-left-color: var(--link-color);
            font-weight: 600;
        }
        
        /* Overlay untuk mobile nav */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease;
            backdrop-filter: blur(3px);
        }
        
        .nav-overlay.active {
            display: block;
            opacity: 1;
        }
        
        /* ===== MAIN CONTENT SECTIONS ===== */
        main {
            margin-bottom: 70px;
            flex: 1;
        }
        
        section {
            margin-bottom: 50px;
            background-color: var(--white);
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        
        section:hover {
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
        }
        
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 25px;
            font-weight: 600;
            line-height: 1.3;
        }
        
        h1 {
            font-size: 32px;
            text-align: center;
            position: relative;
            padding-bottom: 20px;
        }
        
        h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }
        
        h2 {
            font-size: 26px;
            border-left: 5px solid var(--primary-color);
            padding-left: 20px;
            margin-top: 10px;
        }
        
        h3 {
            font-size: 20px;
            margin-bottom: 20px;
        }
        
        p {
            margin-bottom: 20px;
            font-size: 17px;
            color: var(--secondary-color);
            line-height: 1.7;
        }
        
section {
  margin-bottom: 50px;
  background-color: #fff;
  padding: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.intro {
  border-top: 4px solid var(--primary-color);
  background-color: #fefefe;
}

.intro h1 {
  margin-bottom: 30px;
}

.topics {
  background-color: #ffffff;
}

.topics h2 {
  border-left-color: #222;
}

.phenomenon {
  background-color: #f9f9f9;
}

.phenomenon h2 {
  border-left-color: #666;
}

.mahjong-experience {
  background-color: #ffffff;
}

.mahjong-experience p {
  max-width: 720px;
}

.closing-note {
  background-color: #fcfcfc;
  border: 1px dashed #ddd;
}

.closing-note h2 {
  border-left: none;
  padding-left: 0;
}
        
        /* Further Navigation */
        .further-nav {
            background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
        }
        
        .further-nav h2 {
            text-align: center;
            border: none;
            padding-left: 0;
        }
        
        .further-nav h2::after {
            content: '';
            display: block;
            width: 100px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), transparent);
            margin: 15px auto 30px;
            border-radius: 2px;
        }
        
        .further-nav nav ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        
        .further-nav a {
            display: flex;
            align-items: center;
            padding: 22px 25px;
            background-color: var(--white);
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            text-decoration: none;
            color: var(--primary-color);
            font-weight: 500;
            transition: var(--transition);
            min-height: 80px;
            position: relative;
            overflow: hidden;
        }
        
        .further-nav a::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 4px;
            height: 100%;
            background-color: var(--link-color);
            transform: scaleY(0);
            transition: transform 0.3s ease;
        }
        
        .further-nav a:hover {
            background-color: #f0f7ff;
            border-color: var(--link-color);
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 102, 204, 0.1);
        }
        
        .further-nav a:hover::before {
            transform: scaleY(1);
        }
        
        /* ===== FOOTER ===== */
        .footer {
            background-color: var(--primary-color);
            color: #ddd;
            padding: 50px 40px 25px;
            border-radius: 15px 15px 0 0;
            margin-top: 60px;
            position: relative;
            overflow: hidden;
        }
        
        .footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #0066cc, #28a745, #ffc107);
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 50px;
            margin-bottom: 50px;
            position: relative;
            z-index: 1;
        }
        
        .footer-col h3 {
            color: var(--white);
            font-size: 20px;
            margin-bottom: 25px;
            border-left: 4px solid var(--white);
            padding-left: 15px;
        }
        
        .footer-col p {
            color: #bbb;
            font-size: 16px;
            line-height: 1.8;
        }
        
        .footer-col ul {
            list-style: none;
        }
        
        .footer-col li {
            margin-bottom: 15px;
        }
        
        .footer-col a {
            color: #bbb;
            text-decoration: none;
            font-size: 16px;
            transition: var(--transition);
            padding: 5px 0;
            display: inline-block;
        }
        
        .footer-col a:hover {
            color: var(--white);
            padding-left: 10px;
        }
        
        .footer-disclaimer {
            border-top: 1px solid #444;
            padding-top: 30px;
            font-size: 15px;
            color: #999;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        
        .footer-disclaimer strong {
            color: #ccc;
        }
        
.editorial-cue {
  width: 100%;
  background: rgba(0,0,0,0.04);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.editorial-cue-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #444;
}

.cue-label {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 12px;
  color: #666;
}

.cue-dot {
  color: #999;
}

.cue-topic {
  font-weight: 500;
  color: #222;
}

        
        /* ===== RESPONSIVE DESIGN ===== */
        @media (max-width: 992px) {
            .desktop-nav ul {
                gap: 30px;
            }
            
            section {
                padding: 35px;
            }
        }
        
        @media (max-width: 768px) {
            body {
                padding: 0 15px;
            }
            
            .hero {
                margin: 20px 0 30px;
            }
            
            .hero-image-container {
                max-width: 100%;
            }
            
            /* Hide desktop nav, show hamburger on mobile */
            .desktop-nav {
                display: none;
            }
            
            .hamburger {
                display: flex;
            }
            
            .mobile-nav {
                display: block;
            }
            
            /* Section padding */
            section {
                padding: 30px;
                margin-bottom: 40px;
            }
            
            h1 {
                font-size: 28px;
                padding-bottom: 15px;
            }
            
            h2 {
                font-size: 24px;
                padding-left: 15px;
            }
            
            p {
                font-size: 16px;
            }
            
            .further-nav nav ul {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .further-nav a {
                padding: 20px;
                min-height: 70px;
            }
            
            .footer {
                padding: 40px 25px 20px;
                margin-top: 40px;
            }
            
            .footer-grid {
                gap: 40px;
            }
            
            .principles li {
                padding: 15px 15px 15px 50px;
            }
            
            .principles li:before {
                left: 15px;
                width: 30px;
                height: 30px;
                font-size: 20px;
            }
        }
        
        @media (max-width: 480px) {
            h1 {
                font-size: 24px;
            }
            
            h2 {
                font-size: 22px;
            }
            
            section {
                padding: 25px 20px;
            }
            
            .hero-image-container {
                border-radius: 8px;
            }
            
            .mobile-nav {
                width: 85%;
            }
            
            .footer-col h3 {
                font-size: 18px;
            }
            
            .footer-col p,
            .footer-col a {
                font-size: 15px;
            }
            
            .topics li {
                padding: 10px 0 10px 30px;
            }
            
            .topics li:before {
                left: 8px;
            }
        }
        
        /* ===== PRINT STYLES ===== */
        @media print {
            .hamburger,
            .mobile-nav,
            .nav-overlay,
            .footer::before,
            .further-nav a:hover::before,
            .desktop-nav a::before {
                display: none !important;
            }
            
            body {
                max-width: 100%;
                padding: 0;
                font-size: 14px;
            }
            
            .desktop-nav {
                display: flex !important;
                position: static;
                box-shadow: none;
                border: 1px solid #000;
                background-color: #fff !important;
            }
            
            .nav-logo {
                filter: none !important;
            }
            
            .nav-brand {
                color: #000 !important;
            }
            
            .desktop-nav a {
                color: #000 !important;
            }
            
            section {
                box-shadow: none;
                border: 1px solid #ccc;
                page-break-inside: avoid;
                margin-bottom: 20px;
            }
            
            a {
                color: #000;
                text-decoration: underline;
            }
            
            .footer {
                background-color: #fff;
                color: #000;
                border: 1px solid #000;
                margin-top: 30px;
            }
            
            .footer-col h3,
            .footer-col p,
            .footer-col a {
                color: #000;
            }
            
            .hero-image-container {
                max-width: 400px;
            }
        }
        
.topic-overview {
  max-width: 1100px;
  margin: 48px auto 0;
  padding: 0 16px;
}

.topic-overview-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.topic-item {
  padding-left: 16px;
  border-left: 3px solid #e5e5e5;
}

.topic-question {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: #111;
  line-height: 1.4;
}
        
        /* ===== UTILITY CLASSES ===== */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        
        .text-center {
            text-align: center;
        }