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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 50%, #7dd3fc 100%);
    color: #0c4a6e;
    min-height: 100vh;
}

/* Navigation Bar */
.top-navigation {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(14, 116, 144, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
}

.brand-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 8px rgba(14, 116, 144, 0.4));
}

.brand-name {
    font-size: 1.9rem;
    font-weight: 700;
    color: #0e7490;
    letter-spacing: -0.5px;
}

.navigation-menu ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.navigation-menu a {
    color: #075985;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    padding: 0.5rem 0;
    position: relative;
}

.navigation-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #0ea5e9;
    transition: width 0.3s;
}

.navigation-menu a:hover::before {
    width: 100%;
}

.navigation-menu a:hover {
    color: #0ea5e9;
}

.menu-button {
    display: none;
    background: #0ea5e9;
    border: none;
    padding: 0.6rem;
    border-radius: 8px;
    cursor: pointer;
}

.menu-button span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    margin: 5px 0;
    transition: 0.3s;
}

/* Main Container */
.page-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.intro-banner {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(186, 230, 253, 0.8) 100%);
    border-radius: 30px;
    padding: 5rem 3rem;
    margin-bottom: 3rem;
    text-align: center;
    box-shadow: 0 10px 40px rgba(14, 116, 144, 0.2);
    border: 2px solid rgba(14, 116, 144, 0.1);
}

.intro-banner h1 {
    font-size: 3.8rem;
    color: #0e7490;
    margin-bottom: 1.2rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.intro-banner p {
    font-size: 1.4rem;
    color: #075985;
    font-weight: 500;
}

.text-block {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 3rem;
    margin-bottom: 2.5rem;
    box-shadow: 0 5px 30px rgba(14, 116, 144, 0.15);
    border: 1px solid rgba(14, 116, 144, 0.1);
}

.text-block h2 {
    color: #0e7490;
    font-size: 2.5rem;
    margin-bottom: 1.8rem;
    font-weight: 700;
}

.text-block h3 {
    color: #0284c7;
    font-size: 1.9rem;
    margin-top: 2.5rem;
    margin-bottom: 1.2rem;
    font-weight: 600;
}

.text-block p {
    line-height: 1.85;
    margin-bottom: 1.4rem;
    color: #0c4a6e;
    font-size: 1.08rem;
}

.text-block ul {
    margin-left: 2.5rem;
    margin-bottom: 1.5rem;
}

.text-block li {
    margin-bottom: 1rem;
    line-height: 1.75;
    color: #0c4a6e;
}

/* Notice Panel */
.notice-panel {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-radius: 20px;
    padding: 2.5rem;
    margin: 2.5rem 0;
    border-left: 6px solid #f59e0b;
    box-shadow: 0 5px 25px rgba(245, 158, 11, 0.2);
}

.notice-panel h3 {
    color: #92400e;
    margin-top: 0;
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
}

.notice-panel ul {
    color: #78350f;
}

.notice-panel li {
    color: #78350f;
    font-weight: 500;
}

.notice-panel strong {
    color: #92400e;
    font-weight: 700;
}

/* Game Display */
.game-display {
    background: rgba(15, 23, 42, 0.05);
    border-radius: 25px;
    padding: 3.5rem;
    margin: 3rem 0;
    text-align: center;
    box-shadow: 0 8px 35px rgba(14, 116, 144, 0.2);
    border: 2px solid rgba(14, 116, 144, 0.2);
}

.game-display h2 {
    color: #0e7490;
    font-size: 2.3rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.game-display p {
    color: #075985;
    margin-bottom: 2rem;
    font-size: 1.15rem;
}

.game-display iframe {
    border-radius: 15px;
    max-width: 100%;
    border: 3px solid #0ea5e9;
    box-shadow: 0 10px 40px rgba(14, 165, 233, 0.3);
}

/* Features Layout */
.features-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin: 3rem 0;
}

.feature-box {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 5px 25px rgba(14, 116, 144, 0.15);
    transition: all 0.3s;
    border: 1px solid rgba(14, 116, 144, 0.1);
}

.feature-box:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 45px rgba(14, 116, 144, 0.25);
    border-color: #0ea5e9;
}

.feature-box h3 {
    color: #0e7490;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.feature-box p {
    color: #075985;
    line-height: 1.75;
}

/* Site Footer */
.site-footer {
    background: linear-gradient(135deg, #0e7490 0%, #0284c7 100%);
    padding: 3.5rem 2rem;
    margin-top: 5rem;
    color: #fff;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-navigation {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.footer-navigation a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: opacity 0.3s;
}

.footer-navigation a:hover {
    opacity: 0.8;
}

.footer-text {
    font-size: 1rem;
    opacity: 0.95;
}

/* Age Verification Overlay */
.age-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(7, 89, 133, 0.96);
    z-index: 10000;
    justify-content: center;
    align-items: center;
}

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

.age-box {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    border-radius: 30px;
    padding: 4rem;
    max-width: 580px;
    text-align: center;
    box-shadow: 0 15px 60px rgba(0, 0, 0, 0.4);
    border: 3px solid #0ea5e9;
}

.age-box h2 {
    color: #0e7490;
    font-size: 2.5rem;
    margin-bottom: 1.2rem;
    font-weight: 800;
}

.age-box p {
    color: #075985;
    margin-bottom: 2rem;
    font-size: 1.2rem;
    line-height: 1.6;
}

.age-controls {
    display: flex;
    gap: 1.8rem;
    justify-content: center;
}

.age-control-btn {
    padding: 1.3rem 3rem;
    border: none;
    border-radius: 15px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Inter', sans-serif;
}

.age-control-yes {
    background: #0ea5e9;
    color: #fff;
}

.age-control-yes:hover {
    background: #0284c7;
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
}

.age-control-no {
    background: #dc2626;
    color: #fff;
}

.age-control-no:hover {
    background: #b91c1c;
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.4);
}

/* Responsive Design */
@media (max-width: 968px) {
    .navigation-menu ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        gap: 0.5rem;
    }

    .navigation-menu ul.active {
        display: flex;
    }

    .menu-button {
        display: block;
    }

    .intro-banner h1 {
        font-size: 2.5rem;
    }

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

    .age-box {
        margin: 1rem;
        padding: 2.5rem;
    }

    .footer-navigation {
        flex-direction: column;
        gap: 1.2rem;
    }
}