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

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-header {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: #8B5CF6;
    text-decoration: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #8B5CF6;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 3px;
}

.main-nav {
    display: flex;
    gap: 30px;
}

.main-nav a {
    color: #555;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    padding: 8px 0;
}

.main-nav a:hover,
.main-nav a.active {
    color: #8B5CF6;
}

.hero {
    padding: 80px 0;
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.cta-button {
    display: inline-block;
    background: white;
    color: #8B5CF6;
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.info-cards {
    padding: 60px 0;
    background: white;
}

.info-cards .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.card h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.card p {
    font-size: 16px;
    line-height: 1.6;
}

.game-showcase {
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.95);
}

.game-showcase h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 40px;
    color: #8B5CF6;
}

.game-container {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

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

.game-note {
    text-align: center;
    margin-top: 20px;
    font-size: 18px;
    color: #666;
}

.features {
    padding: 60px 0;
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    color: white;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.feature-item p {
    font-size: 16px;
    line-height: 1.6;
}

.responsibility {
    padding: 60px 0;
    background: white;
}

.responsibility h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: #8B5CF6;
}

.responsibility > .container > p {
    text-align: center;
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto 40px;
    color: #555;
}

.notice-box {
    background: #FEF3C7;
    border-left: 5px solid #F59E0B;
    padding: 30px;
    border-radius: 10px;
    max-width: 800px;
    margin: 0 auto;
}

.notice-box strong {
    display: block;
    font-size: 20px;
    margin-bottom: 15px;
    color: #D97706;
}

.notice-box ul {
    list-style-position: inside;
    color: #555;
}

.notice-box li {
    margin: 10px 0;
}

.main-footer {
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #8B5CF6;
}

.footer-section p {
    line-height: 1.8;
    color: #ccc;
}

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

.footer-section ul li {
    margin: 10px 0;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #8B5CF6;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #999;
}

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

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

.age-modal-content {
    background: white;
    padding: 50px;
    border-radius: 20px;
    text-align: center;
    max-width: 500px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.age-modal-content h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #8B5CF6;
}

.age-modal-content p {
    font-size: 18px;
    margin-bottom: 15px;
    color: #555;
}

.age-buttons {
    display: flex;
    gap: 20px;
    margin-top: 30px;
    justify-content: center;
}

.age-buttons button {
    padding: 15px 40px;
    font-size: 18px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-yes {
    background: #10B981;
    color: white;
}

.btn-yes:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.4);
}

.btn-no {
    background: #EF4444;
    color: white;
}

.btn-no:hover {
    background: #DC2626;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(239, 68, 68, 0.4);
}

.content-page {
    background: white;
    min-height: calc(100vh - 200px);
    padding: 60px 0;
}

.content-page h1 {
    font-size: 42px;
    margin-bottom: 30px;
    color: #8B5CF6;
    text-align: center;
}

.content-box {
    max-width: 900px;
    margin: 0 auto;
    background: #f9f9f9;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.content-box h2 {
    font-size: 28px;
    margin: 30px 0 15px;
    color: #8B5CF6;
}

.content-box p,
.content-box li {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
    margin-bottom: 15px;
}

.content-box ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.warning-box {
    background: #FEE2E2;
    border: 2px solid #EF4444;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.warning-box h2 {
    color: #DC2626;
    margin-top: 0;
}

.play-page {
    background: white;
    min-height: calc(100vh - 200px);
}

.play-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0;
    color: white;
    text-align: center;
}

.play-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.play-header p {
    font-size: 18px;
}

.game-play {
    padding: 60px 0;
}

.game-wrapper {
    max-width: 1000px;
    margin: 0 auto 40px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.game-frame-full {
    width: 100%;
    height: 700px;
    border: none;
    display: block;
}

.game-info {
    max-width: 800px;
    margin: 0 auto;
    background: #f9f9f9;
    padding: 30px;
    border-radius: 15px;
}

.game-info h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #8B5CF6;
}

.game-info p {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
    margin-bottom: 25px;
}

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

    .main-nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 250px;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        padding: 30px 20px;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        transition: left 0.3s;
        gap: 0;
    }

    .main-nav.active {
        left: 0;
    }

    .main-nav a {
        padding: 15px 0;
        border-bottom: 1px solid #eee;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .game-frame {
        height: 400px;
    }

    .game-frame-full {
        height: 500px;
    }

    .age-modal-content {
        padding: 30px 20px;
        margin: 20px;
    }

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

    .content-box {
        padding: 25px;
    }

    .content-page h1 {
        font-size: 32px;
    }
}