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

body {
    font-family: 'Open Sans', sans-serif;
    background: #F7F9FB;
    color: #2C3E50;
    line-height: 1.6;
}

.header-inner,
.welcome-wrapper,
.intro-flex,
.values-container,
.game-container-wrapper,
.benefits-container,
.notice-wrapper,
.footer-content,
.play-welcome-wrapper,
.play-game-wrapper,
.legal-intro-inner,
.legal-text-wrapper {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 28px;
}

.site-header {
    background: #ffffff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 18px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-text {
    font-size: 30px;
    font-weight: 800;
    color: #00CED1;
    letter-spacing: 1px;
}

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

.menu-bar {
    width: 28px;
    height: 3px;
    background: #00CED1;
    border-radius: 2px;
    transition: 0.3s;
}

.site-nav {
    display: flex;
    gap: 28px;
}

.nav-link {
    color: #2C3E50;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    padding: 10px 18px;
    border-radius: 6px;
    transition: all 0.3s;
}

.nav-link:hover,
.nav-link-active {
    background: #00CED1;
    color: #ffffff;
}

.welcome-section {
    background: linear-gradient(135deg, #00CED1 0%, #20B2AA 100%);
    padding: 90px 0;
    color: #ffffff;
}

.welcome-text h1 {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 22px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.welcome-lead {
    font-size: 22px;
    font-weight: 300;
    line-height: 1.7;
    max-width: 800px;
}

.introduction-section {
    padding: 80px 0;
    background: #ffffff;
}

.intro-flex {
    display: flex;
    gap: 45px;
    align-items: flex-start;
}

.intro-text-block {
    flex: 1.5;
}

.intro-text-block h2 {
    font-size: 38px;
    color: #00CED1;
    margin-bottom: 25px;
    font-weight: 800;
}

.intro-text-block p {
    font-size: 17px;
    margin-bottom: 20px;
    line-height: 1.8;
}

.intro-highlight-block {
    flex: 1;
    background: #E8F8F8;
    padding: 35px;
    border-radius: 12px;
    border-left: 5px solid #00CED1;
}

.intro-highlight-block h3 {
    font-size: 24px;
    color: #00CED1;
    margin-bottom: 20px;
    font-weight: 700;
}

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

.highlight-list li {
    font-size: 16px;
    padding: 10px 0;
    border-bottom: 1px solid #d1e7e7;
}

.highlight-list li:last-child {
    border-bottom: none;
}

.highlight-list li::before {
    content: '✓';
    color: #00CED1;
    font-weight: bold;
    margin-right: 10px;
}

.values-section {
    padding: 80px 0;
    background: #F7F9FB;
}

.values-title {
    font-size: 40px;
    text-align: center;
    color: #00CED1;
    margin-bottom: 50px;
    font-weight: 800;
}

.values-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
}

.value-card {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0,206,209,0.2);
}

.value-emoji {
    font-size: 52px;
    margin-bottom: 20px;
}

.value-card h3 {
    font-size: 24px;
    color: #00CED1;
    margin-bottom: 18px;
    font-weight: 700;
}

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

.game-section {
    padding: 80px 0;
    background: #ffffff;
}

.game-section-title {
    font-size: 42px;
    text-align: center;
    color: #00CED1;
    margin-bottom: 20px;
    font-weight: 800;
}

.game-section-description {
    text-align: center;
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto 45px;
}

.game-embed-box {
    max-width: 100%;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,206,209,0.3);
    border: 3px solid #00CED1;
}

.game-embed-iframe {
    width: 100%;
    height: 720px;
    border: none;
    display: block;
}

.benefits-section {
    padding: 80px 0;
    background: #F7F9FB;
}

.benefits-title {
    font-size: 40px;
    text-align: center;
    color: #00CED1;
    margin-bottom: 50px;
    font-weight: 800;
}

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

.benefit-column {
    background: #ffffff;
    padding: 32px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.06);
}

.benefit-column h4 {
    font-size: 20px;
    color: #00CED1;
    margin-bottom: 15px;
    font-weight: 700;
}

.benefit-column p {
    font-size: 16px;
    line-height: 1.7;
}

.notice-section {
    padding: 60px 0;
    background: #E8F8F8;
}

.notice-card {
    max-width: 950px;
    margin: 0 auto;
    background: #ffffff;
    padding: 40px;
    border-radius: 12px;
    border: 3px solid #00CED1;
    box-shadow: 0 6px 20px rgba(0,206,209,0.2);
}

.notice-card h3 {
    font-size: 32px;
    color: #00CED1;
    margin-bottom: 20px;
    font-weight: 800;
    text-align: center;
}

.notice-card p {
    font-size: 17px;
    line-height: 1.8;
    text-align: center;
}

.play-welcome {
    background: linear-gradient(135deg, #00CED1 0%, #20B2AA 100%);
    padding: 80px 0;
    color: #ffffff;
    text-align: center;
}

.play-welcome h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
}

.play-welcome p {
    font-size: 20px;
    font-weight: 300;
}

.play-game-section {
    padding: 60px 0 80px;
    background: #ffffff;
}

.play-instructions {
    background: #E8F8F8;
    padding: 35px;
    border-radius: 12px;
    margin-bottom: 40px;
}

.play-instructions h3 {
    font-size: 28px;
    color: #00CED1;
    margin-bottom: 25px;
    font-weight: 700;
}

.instruction-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

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

.instruction-emoji {
    font-size: 32px;
}

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

.play-game-box {
    margin: 40px 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,206,209,0.3);
    border: 3px solid #00CED1;
}

.play-game-iframe {
    width: 100%;
    height: 820px;
    border: none;
    display: block;
}

.play-notice {
    background: #FFF4E6;
    padding: 30px;
    border-radius: 10px;
    border-left: 5px solid #FF9800;
    margin-top: 40px;
}

.play-notice p {
    font-size: 17px;
    color: #5D4037;
}

.legal-intro {
    background: linear-gradient(135deg, #00CED1 0%, #20B2AA 100%);
    padding: 70px 0;
    color: #ffffff;
    text-align: center;
}

.legal-intro h1 {
    font-size: 46px;
    font-weight: 800;
    margin-bottom: 15px;
}

.legal-date {
    font-size: 17px;
    font-weight: 300;
}

.legal-text-section {
    padding: 60px 0 80px;
    background: #ffffff;
}

.legal-content {
    max-width: 950px;
    margin: 0 auto;
}

.legal-content h2 {
    font-size: 30px;
    color: #00CED1;
    margin: 45px 0 20px;
    font-weight: 700;
}

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

.legal-content p {
    font-size: 17px;
    line-height: 1.9;
    margin-bottom: 22px;
}

.site-footer {
    background: #2C3E50;
    color: #ECF0F1;
    padding: 70px 0 30px;
    margin-top: 80px;
}

.footer-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 45px;
    margin-bottom: 45px;
}

.footer-col h4 {
    font-size: 22px;
    color: #00CED1;
    margin-bottom: 20px;
    font-weight: 700;
}

.footer-col p {
    margin-bottom: 20px;
    line-height: 1.7;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: #ECF0F1;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #00CED1;
}

.footer-base {
    text-align: center;
    padding-top: 35px;
    border-top: 1px solid #34495E;
    font-size: 15px;
}

.age-check-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.93);
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.age-check-overlay.show {
    display: flex;
}

.age-check-dialog {
    background: #ffffff;
    padding: 50px 40px;
    border-radius: 15px;
    max-width: 520px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    border: 4px solid #00CED1;
}

.age-check-header {
    margin-bottom: 25px;
}

.age-check-icon {
    font-size: 60px;
}

.age-check-dialog h2 {
    font-size: 32px;
    color: #00CED1;
    margin-top: 15px;
    font-weight: 800;
}

.age-check-dialog p {
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: 30px;
    color: #2C3E50;
}

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

.age-btn {
    padding: 16px 35px;
    font-size: 17px;
    font-weight: 700;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Open Sans', sans-serif;
    transition: all 0.3s;
}

.age-btn-confirm {
    background: #00CED1;
    color: #ffffff;
}

.age-btn-decline {
    background: #E74C3C;
    color: #ffffff;
}

.age-btn-confirm:hover {
    background: #00B5B8;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,206,209,0.4);
}

.age-btn-decline:hover {
    background: #C0392B;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231,76,60,0.4);
}

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

    .site-nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 30px 0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        transition: left 0.3s;
    }

    .site-nav.mobile-open {
        left: 0;
    }

    .welcome-text h1 {
        font-size: 36px;
    }

    .welcome-lead {
        font-size: 18px;
    }

    .intro-flex {
        flex-direction: column;
    }

    .intro-text-block h2,
    .values-title,
    .game-section-title,
    .benefits-title {
        font-size: 32px;
    }

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

    .play-game-iframe {
        height: 650px;
    }

    .play-welcome h1,
    .legal-intro h1 {
        font-size: 36px;
    }

    .age-check-dialog {
        margin: 20px;
        padding: 35px 25px;
    }

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

    .age-btn {
        width: 100%;
    }
}