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

body {
    font-family: 'Nunito', sans-serif;
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 50%, #0e7490 100%);
    color: #1e293b;
    line-height: 1.7;
    min-height: 100vh;
}

.header {
    background: linear-gradient(90deg, #f97316 0%, #fb923c 50%, #fdba74 100%);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.25);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-wrapper {
    max-width: 1350px;
    margin: 0 auto;
    padding: 1.3rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
}

.nav-item {
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    padding: 0.7rem 1.5rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
}

.nav-item:hover,
.nav-item.active {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.menu-btn {
    display: none;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    padding: 0.7rem;
    border-radius: 8px;
    cursor: pointer;
    gap: 4px;
}

.menu-btn span {
    width: 28px;
    height: 3px;
    background: #ffffff;
    border-radius: 3px;
    transition: 0.3s;
}

.main-wrapper {
    max-width: 1350px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.welcome-banner {
    text-align: center;
    padding: 4rem 3rem;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
    border-radius: 25px;
    margin-bottom: 3rem;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.2);
}

.welcome-banner h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1rem;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.2);
}

.welcome-text {
    font-size: 1.4rem;
    color: #ffffff;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
}

.notice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.notice-box {
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    color: #ffffff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.notice-box:hover {
    transform: translateY(-10px);
}

.notice-box.coral {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

.notice-box.teal {
    background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
}

.notice-box.orange {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
}

.notice-emoji {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
}

.notice-box h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.about-area {
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem;
    border-radius: 20px;
    margin: 3rem 0;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.15);
}

.about-area h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: #0891b2;
    margin-bottom: 1.5rem;
}

.about-text p {
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
    color: #334155;
}

.game-section {
    margin: 4rem 0;
}

.game-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.game-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.game-iframe {
    width: 100%;
    height: 650px;
    border: none;
    border-radius: 15px;
}

.game-info {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 1.2rem;
    color: #ffffff;
    font-weight: 600;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

.features-area {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    color: #ffffff;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: scale(1.05);
}

.feature-card.cyan {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.feature-card.pink {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

.feature-card.lime {
    background: linear-gradient(135deg, #84cc16 0%, #65a30d 100%);
}

.feature-card.amber {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.feature-card.purple {
    background: linear-gradient(135deg, #a855f7 0%, #9333ea 100%);
}

.feature-card.red {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.feature-emoji {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.responsibility-area {
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem;
    border-radius: 20px;
    margin: 3rem 0;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.15);
}

.responsibility-area h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: #0891b2;
    margin-bottom: 1.5rem;
}

.responsibility-area p {
    font-size: 1.05rem;
    color: #334155;
}

.play-banner {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
    border-radius: 25px;
    margin-bottom: 3rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.play-banner h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1rem;
}

.play-banner p {
    font-size: 1.3rem;
    color: #ffffff;
}

.play-game-section {
    margin: 3rem 0;
}

.play-game-wrapper {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.play-game-iframe {
    width: 100%;
    height: 750px;
    border: none;
    border-radius: 15px;
}

.instructions-section {
    margin: 4rem 0;
}

.instructions-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.instruction-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.instruction-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.instruction-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: #0891b2;
    margin-bottom: 1rem;
}

.instruction-card p {
    color: #334155;
}

.gaming-tips {
    margin: 4rem 0;
}

.gaming-tips h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tip-box {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: #334155;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.document-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem;
    border-radius: 20px;
    margin: 2rem 0;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.15);
}

.document-section h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    color: #0891b2;
    margin-bottom: 1rem;
}

.document-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: #0891b2;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.document-section p {
    margin-bottom: 1.2rem;
    line-height: 1.9;
    color: #334155;
}

.document-section ul {
    margin: 1rem 0 1rem 2.5rem;
    line-height: 1.9;
    color: #334155;
}

.date-stamp {
    font-style: italic;
    color: #64748b;
    margin-bottom: 2rem;
}

.footer {
    background: linear-gradient(90deg, #0e7490 0%, #0891b2 50%, #06b6d4 100%);
    padding: 3rem 2rem 1rem;
    margin-top: 5rem;
}

.footer-wrapper {
    max-width: 1350px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #e0f2fe;
}

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

.footer-list li {
    margin: 0.5rem 0;
}

.footer-list a {
    color: #e0f2fe;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    max-width: 1350px;
    margin: 0 auto;
    text-align: center;
    padding-top: 2rem;
    border-top: 2px solid rgba(255, 255, 255, 0.3);
    color: #e0f2fe;
}

.age-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    backdrop-filter: blur(10px);
}

.age-modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.age-modal-content {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    padding: 3rem;
    border-radius: 25px;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.5);
}

.age-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.age-modal-content h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1.5rem;
}

.age-modal-content p {
    color: #ffffff;
    font-size: 1.1rem;
    margin: 1rem 0;
}

.age-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.age-buttons button {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
}

.btn-yes {
    background: #fbbf24;
    color: #1e293b;
}

.btn-yes:hover {
    background: #f59e0b;
    transform: scale(1.08);
}

.btn-no {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.btn-no:hover {
    background: rgba(255, 255, 255, 0.3);
}

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 75px;
        flex-direction: column;
        background: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
        width: 100%;
        padding: 2rem;
        transition: 0.3s;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }

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

    .welcome-banner h1 {
        font-size: 2.2rem;
    }

    .welcome-text {
        font-size: 1.1rem;
    }

    .game-iframe {
        height: 500px;
    }

    .play-game-iframe {
        height: 550px;
    }

    .age-modal-content {
        margin: 1rem;
        padding: 2rem;
    }

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

    .main-wrapper {
        padding: 2rem 1rem;
    }

    .about-area,
    .responsibility-area,
    .document-section {
        padding: 1.5rem;
    }
}