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

:root {
    --primary-cyan: #00d9ff;
    --electric-blue: #0099ff;
    --deep-blue: #001a33;
    --darker-blue: #000d1a;
    --light-cyan: #5ff0ff;
    --bg-dark: #0a1628;
    --text-light: #c8e6ff;
    --text-white: #ffffff;
    --accent-glow: rgba(0, 217, 255, 0.3);
}

body {
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, var(--darker-blue) 0%, var(--deep-blue) 50%, var(--bg-dark) 100%);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
.site-header {
    background: rgba(0, 13, 26, 0.95);
    border-bottom: 2px solid var(--primary-cyan);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    filter: drop-shadow(0 0 8px var(--primary-cyan));
}

.brand-name {
    font-family: 'Orbitron', sans-serif;
    font-size: 26px;
    font-weight: 900;
    color: var(--primary-cyan);
    letter-spacing: 4px;
    text-shadow: 0 0 10px var(--accent-glow);
}

.main-nav {
    display: flex;
    gap: 35px;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-cyan);
    transition: width 0.3s ease;
    box-shadow: 0 0 8px var(--primary-cyan);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-cyan);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 28px;
    height: 3px;
    background: var(--primary-cyan);
    border-radius: 2px;
    transition: all 0.3s ease;
    box-shadow: 0 0 5px var(--primary-cyan);
}

.mobile-menu {
    display: none;
    background: rgba(0, 13, 26, 0.98);
    border-bottom: 2px solid var(--primary-cyan);
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    z-index: 999;
    flex-direction: column;
    box-shadow: 0 8px 20px var(--accent-glow);
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    color: var(--text-light);
    text-decoration: none;
    padding: 18px 30px;
    border-bottom: 1px solid rgba(0, 217, 255, 0.2);
    font-family: 'Orbitron', sans-serif;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.mobile-menu a:hover {
    background: rgba(0, 217, 255, 0.1);
    color: var(--primary-cyan);
}

/* Content Wrapper */
.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

.content-wrapper-full {
    width: 100%;
    padding: 0 30px;
}

/* Hero Section */
.hero-section {
    padding: 120px 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 2px solid var(--primary-cyan);
}

.hero-bg-effect {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 217, 255, 0.15) 0%, transparent 70%);
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 64px;
    font-weight: 900;
    color: var(--text-white);
    margin-bottom: 25px;
    text-shadow: 0 0 20px var(--accent-glow);
}

.highlight {
    color: var(--primary-cyan);
    text-shadow: 0 0 30px var(--primary-cyan);
}

.hero-text {
    font-size: 24px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.hero-cta {
    display: inline-block;
    padding: 18px 50px;
    background: linear-gradient(135deg, var(--electric-blue), var(--primary-cyan));
    color: var(--text-white);
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    font-size: 18px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 50px;
    border: 2px solid var(--primary-cyan);
    transition: all 0.3s ease;
    box-shadow: 0 0 20px var(--accent-glow);
}

.hero-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 40px var(--primary-cyan);
}

/* Content Sections */
.intro-block, .principles-section, .game-section, .features-section,
.responsibility-section, .play-header, .play-guide, .play-zone,
.document-header, .document-content {
    padding: 80px 0;
}

.intro-card {
    background: rgba(0, 26, 51, 0.6);
    border: 2px solid var(--primary-cyan);
    border-radius: 15px;
    padding: 50px;
    box-shadow: 0 8px 32px var(--accent-glow);
    backdrop-filter: blur(10px);
}

.intro-card h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 38px;
    color: var(--primary-cyan);
    margin-bottom: 30px;
    text-shadow: 0 0 15px var(--accent-glow);
}

.intro-card p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* Section Titles */
.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 44px;
    font-weight: 900;
    text-align: center;
    color: var(--primary-cyan);
    margin-bottom: 60px;
    text-shadow: 0 0 20px var(--accent-glow);
}

/* Principles Grid */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
}

.principle-card {
    background: rgba(0, 26, 51, 0.6);
    border: 2px solid;
    border-radius: 12px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.card-blue {
    border-color: #0099ff;
}

.card-cyan {
    border-color: #00d9ff;
}

.card-electric {
    border-color: #5ff0ff;
}

.principle-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--accent-glow);
}

.principle-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.principle-icon {
    font-size: 42px;
}

.principle-card h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 26px;
    color: var(--text-white);
}

.principle-card p {
    font-size: 16px;
    line-height: 1.7;
}

/* Game Section */
.game-intro {
    text-align: center;
    margin-bottom: 45px;
}

.game-intro h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 42px;
    color: var(--primary-cyan);
    margin-bottom: 15px;
    text-shadow: 0 0 15px var(--accent-glow);
}

.game-intro p {
    font-size: 18px;
}

.game-frame {
    max-width: 1000px;
    margin: 0 auto;
    background: #000;
    border: 3px solid var(--primary-cyan);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 40px var(--accent-glow);
}

.game-frame iframe {
    width: 100%;
    height: 600px;
    display: block;
}

.game-footer {
    text-align: center;
    margin-top: 35px;
}

.game-link {
    display: inline-block;
    font-family: 'Orbitron', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-cyan);
    text-decoration: none;
    transition: all 0.3s ease;
}

.game-link:hover {
    color: var(--light-cyan);
    text-shadow: 0 0 10px var(--primary-cyan);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-item {
    background: rgba(0, 26, 51, 0.6);
    border: 2px solid rgba(0, 217, 255, 0.3);
    border-radius: 10px;
    padding: 35px;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.feature-item:hover {
    border-color: var(--primary-cyan);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.feature-number {
    font-family: 'Orbitron', sans-serif;
    font-size: 48px;
    font-weight: 900;
    color: rgba(0, 217, 255, 0.3);
    margin-bottom: 15px;
}

.feature-item h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 24px;
    color: var(--primary-cyan);
    margin-bottom: 15px;
}

.feature-item p {
    font-size: 16px;
    line-height: 1.7;
}

/* Responsibility Section */
.responsibility-panel {
    background: rgba(0, 26, 51, 0.6);
    border: 2px solid var(--primary-cyan);
    border-radius: 15px;
    padding: 50px;
    box-shadow: 0 8px 32px var(--accent-glow);
    backdrop-filter: blur(10px);
}

.responsibility-panel h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 36px;
    color: var(--primary-cyan);
    margin-bottom: 25px;
}

.responsibility-panel p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* Play Page */
.play-header {
    background: linear-gradient(135deg, rgba(0, 153, 255, 0.2) 0%, rgba(0, 217, 255, 0.2) 100%);
    border-bottom: 2px solid var(--primary-cyan);
    text-align: center;
}

.play-header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 52px;
    color: var(--text-white);
    margin-bottom: 15px;
    text-shadow: 0 0 20px var(--accent-glow);
}

.play-subtitle {
    font-size: 22px;
    color: var(--text-light);
}

.guide-card {
    background: rgba(0, 26, 51, 0.6);
    border: 2px solid var(--primary-cyan);
    border-radius: 12px;
    padding: 40px;
    max-width: 1000px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px var(--accent-glow);
}

.guide-card h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 32px;
    color: var(--primary-cyan);
    margin-bottom: 30px;
    text-align: center;
}

.guide-content {
    margin-bottom: 25px;
}

.guide-item {
    padding: 15px;
    margin-bottom: 12px;
    background: rgba(0, 217, 255, 0.05);
    border-left: 3px solid var(--primary-cyan);
    border-radius: 5px;
}

.guide-item strong {
    color: var(--primary-cyan);
}

.guide-notice {
    background: rgba(0, 217, 255, 0.1);
    border: 2px solid var(--primary-cyan);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    color: var(--text-white);
}

.play-zone {
    background: rgba(0, 13, 26, 0.8);
}

.game-fullscreen {
    max-width: 100%;
    background: #000;
    border: 3px solid var(--primary-cyan);
    box-shadow: 0 0 40px var(--accent-glow);
}

.game-fullscreen iframe {
    width: 100%;
    height: 750px;
    display: block;
}

/* Document Pages */
.document-header {
    background: linear-gradient(135deg, rgba(0, 153, 255, 0.2) 0%, rgba(0, 217, 255, 0.2) 100%);
    border-bottom: 2px solid var(--primary-cyan);
    text-align: center;
    padding: 70px 30px;
}

.alert-header {
    background: linear-gradient(135deg, rgba(255, 0, 0, 0.2) 0%, rgba(0, 217, 255, 0.2) 100%);
}

.document-header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 52px;
    color: var(--text-white);
    margin-bottom: 15px;
    text-shadow: 0 0 20px var(--accent-glow);
}

.doc-date {
    font-size: 16px;
    color: var(--text-light);
}

.document-body {
    background: rgba(0, 26, 51, 0.6);
    border: 2px solid var(--primary-cyan);
    border-radius: 15px;
    padding: 50px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px var(--accent-glow);
}

.document-body h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 32px;
    color: var(--primary-cyan);
    margin-top: 40px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-cyan);
}

.document-body h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 24px;
    color: var(--light-cyan);
    margin-top: 30px;
    margin-bottom: 15px;
}

.document-body p {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 18px;
}

.document-body ul {
    margin-left: 30px;
    margin-bottom: 20px;
}

.document-body li {
    margin-bottom: 10px;
    line-height: 1.7;
}

/* Alert Boxes */
.alert-box {
    background: rgba(255, 0, 0, 0.1);
    border: 3px solid #ff0040;
    border-radius: 10px;
    padding: 35px;
    margin: 35px 0;
    box-shadow: 0 0 20px rgba(255, 0, 64, 0.3);
}

.alert-box h2 {
    color: #ff4060 !important;
    border-bottom-color: #ff4060 !important;
}

.summary-box {
    background: rgba(0, 217, 255, 0.1);
    border: 2px solid var(--primary-cyan);
    border-radius: 10px;
    padding: 30px;
    margin: 30px 0;
}

.summary-box ul {
    list-style: none;
}

.summary-box li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 217, 255, 0.2);
}

.summary-box li:last-child {
    border-bottom: none;
}

/* Age Verification Modal */
.age-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.age-modal.active {
    display: flex;
}

.age-modal-content {
    background: linear-gradient(135deg, var(--deep-blue), var(--darker-blue));
    border: 3px solid var(--primary-cyan);
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    padding: 50px 40px;
    box-shadow: 0 0 60px var(--primary-cyan);
    text-align: center;
    position: relative;
}

.modal-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 15px;
    background: radial-gradient(circle at 50% 50%, rgba(0, 217, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.age-modal-content h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 34px;
    color: var(--primary-cyan);
    margin-bottom: 25px;
    text-shadow: 0 0 15px var(--accent-glow);
}

.age-modal-content p {
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: 15px;
}

.age-buttons {
    display: flex;
    gap: 15px;
    margin-top: 35px;
}

.btn-confirm, .btn-decline {
    flex: 1;
    padding: 16px;
    font-family: 'Orbitron', sans-serif;
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-confirm {
    background: var(--primary-cyan);
    color: var(--darker-blue);
    border-color: var(--primary-cyan);
}

.btn-confirm:hover {
    box-shadow: 0 0 25px var(--primary-cyan);
    transform: translateY(-2px);
}

.btn-decline {
    background: transparent;
    color: var(--text-light);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-decline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-light);
}

/* Footer */
.site-footer {
    background: rgba(0, 13, 26, 0.95);
    border-top: 2px solid var(--primary-cyan);
    padding: 60px 0 25px;
    margin-top: 80px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-bottom: 35px;
}

.footer-col h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 20px;
    color: var(--primary-cyan);
    margin-bottom: 20px;
    text-shadow: 0 0 10px var(--accent-glow);
}

.footer-col p {
    font-size: 15px;
    line-height: 1.7;
}

.footer-col a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--primary-cyan);
}

.footer-legal {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(0, 217, 255, 0.3);
}

.footer-legal p {
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 968px) {
    .main-nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 42px;
    }

    .principles-grid, .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-container, .content-wrapper {
        padding: 0 20px;
    }

    .hero-section {
        padding: 80px 20px;
    }

    .hero-title {
        font-size: 36px;
    }

    .intro-card, .responsibility-panel, .guide-card, .document-body {
        padding: 30px;
    }

    .game-frame iframe {
        height: 400px;
    }

    .game-fullscreen iframe {
        height: 500px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .brand-name {
        font-size: 20px;
    }

    .hero-title {
        font-size: 30px;
    }

    .age-buttons {
        flex-direction: column;
    }
}