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

body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(180deg, #0c4a6e 0%, #164e63 50%, #0c4a6e 100%);
    color: #e5e7eb;
    line-height: 1.6;
    min-height: 100vh;
}

/* Age Popup */
.age-popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(12, 74, 110, 0.98);
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.age-popup.show {
    display: flex;
}

.age-popup-box {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    border-radius: 16px;
    padding: 50px 45px;
    max-width: 550px;
    width: 90%;
    text-align: center;
    box-shadow: 0 25px 70px rgba(6, 182, 212, 0.4);
    animation: popIn 0.4s ease;
}

.age-popup-icon {
    font-size: 70px;
    margin-bottom: 25px;
}

.age-popup-box h2 {
    color: #fff;
    font-size: 34px;
    margin-bottom: 25px;
    font-weight: 700;
}

.age-popup-box p {
    color: #f0f9ff;
    font-size: 17px;
    margin-bottom: 15px;
    line-height: 1.7;
}

.age-popup-actions {
    display: flex;
    gap: 20px;
    margin-top: 35px;
}

.age-btn {
    flex: 1;
    padding: 16px 32px;
    border: none;
    border-radius: 10px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.age-btn.confirm {
    background: #fff;
    color: #06b6d4;
}

.age-btn.confirm:hover {
    background: #f0f9ff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.3);
}

.age-btn.deny {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.age-btn.deny:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

/* Header */
.site-header {
    background: rgba(8, 47, 73, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 3px solid #06b6d4;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    font-size: 36px;
}

.brand-name {
    color: #06b6d4;
    font-size: 30px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.hamburger span {
    display: block;
    width: 30px;
    height: 3px;
    background: #06b6d4;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.navigation {
    display: flex;
    gap: 8px;
}

.nav-link {
    color: #cbd5e1;
    text-decoration: none;
    padding: 12px 24px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 8px;
    font-size: 16px;
}

.nav-link:hover,
.nav-link.current {
    color: #fff;
    background: rgba(6, 182, 212, 0.25);
}

/* Main Container */
.main-container {
    padding-bottom: 40px;
}

/* Banner Section */
.banner-section {
    padding: 90px 20px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.2) 0%, rgba(8, 145, 178, 0.2) 100%);
    text-align: center;
}

.banner-content {
    max-width: 1100px;
    margin: 0 auto;
}

.banner-content h1 {
    font-size: 58px;
    color: #fff;
    margin-bottom: 25px;
    font-weight: 900;
    text-shadow: 0 4px 15px rgba(6, 182, 212, 0.5);
}

.banner-tagline {
    font-size: 24px;
    color: #bfdbfe;
    margin-bottom: 20px;
    font-weight: 500;
}

.banner-description {
    font-size: 18px;
    color: #cbd5e1;
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.action-btn {
    display: inline-block;
    padding: 18px 48px;
    background: #06b6d4;
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
}

.action-btn:hover {
    background: #0891b2;
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(6, 182, 212, 0.6);
}

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

/* Core Section */
.core-section {
    padding: 80px 20px;
}

.heading-main {
    text-align: center;
    font-size: 44px;
    color: #fff;
    margin-bottom: 60px;
    font-weight: 700;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.principle-box {
    background: rgba(6, 182, 212, 0.1);
    border: 2px solid rgba(6, 182, 212, 0.3);
    border-radius: 12px;
    padding: 35px 30px;
    transition: all 0.3s ease;
}

.principle-box:hover {
    background: rgba(6, 182, 212, 0.2);
    border-color: #06b6d4;
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(6, 182, 212, 0.3);
}

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

.principle-icon {
    font-size: 52px;
}

.principle-box h3 {
    color: #fff;
    font-size: 24px;
    font-weight: 700;
}

.principle-box p {
    color: #cbd5e1;
    font-size: 16px;
    line-height: 1.8;
}

/* Info Section */
.info-section {
    padding: 80px 20px;
    background: rgba(0, 0, 0, 0.2);
}

.info-blocks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.info-block {
    padding: 40px 35px;
    border-radius: 12px;
    border-left: 6px solid #06b6d4;
}

.info-block.primary {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.25) 0%, rgba(8, 145, 178, 0.25) 100%);
}

.info-block.secondary {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.25) 0%, rgba(14, 116, 144, 0.25) 100%);
}

.info-block h3 {
    color: #fff;
    font-size: 26px;
    margin-bottom: 20px;
    font-weight: 700;
}

.info-block p {
    color: #cbd5e1;
    font-size: 17px;
    line-height: 1.8;
}

/* Featured Section */
.featured-section {
    padding: 80px 20px;
}

.subheading {
    text-align: center;
    font-size: 19px;
    color: #94a3b8;
    margin-bottom: 45px;
}

.game-display {
    background: #000;
    border: 4px solid #06b6d4;
    border-radius: 16px;
    overflow: hidden;
    max-width: 1000px;
    margin: 0 auto;
    box-shadow: 0 15px 50px rgba(6, 182, 212, 0.4);
}

.game-frame {
    width: 100%;
    height: 600px;
    border: none;
    display: block;
}

/* Advantages Section */
.advantages-section {
    padding: 80px 20px;
    background: rgba(0, 0, 0, 0.2);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.advantage-card {
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.2);
    padding: 35px 28px;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.advantage-card:hover {
    background: rgba(6, 182, 212, 0.15);
    border-color: #06b6d4;
    transform: translateY(-6px);
}

.advantage-num {
    color: #06b6d4;
    font-size: 56px;
    font-weight: 900;
    margin-bottom: 15px;
    opacity: 0.6;
}

.advantage-card h4 {
    color: #fff;
    font-size: 23px;
    margin-bottom: 15px;
    font-weight: 700;
}

.advantage-card p {
    color: #cbd5e1;
    font-size: 16px;
    line-height: 1.7;
}

/* Responsibility Section */
.responsibility-section {
    padding: 80px 20px;
}

.responsibility-panel {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    padding: 50px 40px;
    border-radius: 15px;
    text-align: center;
    max-width: 950px;
    margin: 0 auto;
    box-shadow: 0 12px 45px rgba(6, 182, 212, 0.4);
}

.responsibility-panel h3 {
    color: #fff;
    font-size: 32px;
    margin-bottom: 22px;
    font-weight: 700;
}

.responsibility-panel p {
    color: #f0f9ff;
    font-size: 18px;
    line-height: 1.8;
}

/* Page Title Section */
.page-title-section {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.3) 0%, rgba(8, 145, 178, 0.3) 100%);
    padding: 70px 20px;
    text-align: center;
    border-bottom: 3px solid #06b6d4;
}

.page-title-section h1 {
    color: #fff;
    font-size: 52px;
    margin-bottom: 15px;
    font-weight: 900;
}

.page-title-section p {
    color: #cbd5e1;
    font-size: 19px;
}

.document-date {
    color: #94a3b8;
    font-size: 16px;
}

/* Guidelines Section */
.guidelines-section {
    padding: 60px 20px;
}

.guidelines-box {
    background: rgba(6, 182, 212, 0.1);
    border: 2px solid rgba(6, 182, 212, 0.3);
    border-radius: 14px;
    padding: 45px;
    max-width: 1000px;
    margin: 0 auto;
}

.guidelines-box h2 {
    color: #fff;
    font-size: 36px;
    margin-bottom: 35px;
    text-align: center;
    font-weight: 700;
}

.guidelines-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.guideline-item {
    background: rgba(8, 47, 73, 0.5);
    padding: 25px;
    border-radius: 10px;
    border-left: 4px solid #06b6d4;
}

.guideline-item strong {
    color: #06b6d4;
    font-size: 19px;
    display: block;
    margin-bottom: 12px;
    font-weight: 700;
}

.guideline-item p {
    color: #cbd5e1;
    font-size: 16px;
    line-height: 1.7;
}

/* Document Section */
.document-section {
    padding: 60px 20px;
}

.document-content {
    background: rgba(8, 47, 73, 0.6);
    border: 2px solid rgba(6, 182, 212, 0.3);
    padding: 55px;
    border-radius: 14px;
    max-width: 1000px;
    margin: 0 auto;
}

.document-content h2 {
    color: #06b6d4;
    font-size: 30px;
    margin-top: 40px;
    margin-bottom: 22px;
    font-weight: 700;
}

.document-content h2:first-child {
    margin-top: 0;
}

.document-content p {
    color: #cbd5e1;
    margin-bottom: 22px;
    line-height: 1.9;
    font-size: 17px;
}

.document-content ul {
    margin: 22px 0 22px 32px;
}

.document-content li {
    color: #cbd5e1;
    margin-bottom: 14px;
    line-height: 1.8;
}

/* Footer */
.site-footer {
    background: rgba(8, 47, 73, 0.8);
    border-top: 3px solid #06b6d4;
    padding: 70px 20px 35px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 45px;
    margin-bottom: 45px;
}

.footer-col h4 {
    color: #06b6d4;
    font-size: 24px;
    margin-bottom: 22px;
    font-weight: 700;
}

.footer-col p {
    color: #94a3b8;
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 18px;
}

.footer-list {
    list-style: none;
}

.footer-list li {
    margin-bottom: 14px;
}

.footer-list a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 16px;
}

.footer-list a:hover {
    color: #06b6d4;
}

.footer-base {
    text-align: center;
    padding-top: 35px;
    border-top: 1px solid rgba(6, 182, 212, 0.3);
}

.footer-base p {
    color: #64748b;
    font-size: 15px;
}

/* Animations */
@keyframes popIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .navigation {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(8, 47, 73, 0.98);
        flex-direction: column;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        border-bottom: 3px solid transparent;
    }

    .navigation.active {
        max-height: 450px;
        border-bottom-color: #06b6d4;
    }

    .nav-link {
        padding: 20px 30px;
        border-radius: 0;
        border-left: 4px solid transparent;
    }

    .nav-link:hover,
    .nav-link.current {
        background: rgba(6, 182, 212, 0.3);
        border-left-color: #06b6d4;
    }

    .banner-content h1 {
        font-size: 40px;
    }

    .banner-tagline {
        font-size: 20px;
    }

    .banner-description {
        font-size: 17px;
    }

    .heading-main {
        font-size: 34px;
    }

    .game-frame {
        height: 400px;
    }

    .document-content {
        padding: 35px 28px;
    }

    .age-popup-box {
        padding: 40px 28px;
    }

    .age-popup-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .banner-content h1 {
        font-size: 34px;
    }

    .game-frame {
        height: 300px;
    }

    .brand-name {
        font-size: 26px;
    }

    .brand-icon {
        font-size: 32px;
    }
}