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

body {
    font-family: 'Lato', sans-serif;
    background: #f0fdfa;
    color: #134e4a;
    line-height: 1.6;
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
}

/* Header */
.site-header {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    box-shadow: 0 3px 10px rgba(6,182,212,0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1300px;
    margin: 0 auto;
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-branding {
    display: flex;
    align-items: center;
    gap: 15px;
}

.site-name {
    font-size: 1.7rem;
    font-weight: 900;
    color: white;
    letter-spacing: 1px;
}

.menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
}

.menu-line {
    width: 30px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s;
}

.menu-btn.open .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(9px, 9px);
}

.menu-btn.open .menu-line:nth-child(2) {
    opacity: 0;
}

.menu-btn.open .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

.site-nav {
    position: fixed;
    top: 90px;
    right: -100%;
    width: 270px;
    background: linear-gradient(180deg, #06b6d4 0%, #0891b2 100%);
    display: flex;
    flex-direction: column;
    transition: right 0.3s;
    box-shadow: -4px 0 12px rgba(0,0,0,0.2);
    max-height: calc(100vh - 90px);
    overflow-y: auto;
}

.site-nav.open {
    right: 0;
}

.nav-item {
    padding: 17px 28px;
    color: white;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    transition: all 0.2s;
}

.nav-item:hover {
    background: rgba(255,255,255,0.15);
    padding-left: 38px;
}

/* Main Banner */
.main-banner {
    background: linear-gradient(135deg, #0891b2 0%, #0e7490 100%);
    color: white;
    padding: 95px 25px;
    text-align: center;
}

.banner-content h1 {
    font-size: 2.7rem;
    margin-bottom: 22px;
    text-shadow: 2px 2px 5px rgba(0,0,0,0.3);
}

.banner-subtitle {
    font-size: 1.25rem;
    margin-bottom: 38px;
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background: white;
    color: #06b6d4;
    padding: 17px 48px;
    border-radius: 35px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.15rem;
    transition: all 0.3s;
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.cta-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 28px rgba(0,0,0,0.4);
}

/* Page Content */
.page-content {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 25px;
}

/* Introduction */
.introduction {
    padding: 75px 0;
    background: white;
}

.intro-wrapper h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 28px;
    color: #0891b2;
}

.intro-description {
    font-size: 1.12rem;
    line-height: 1.9;
    color: #134e4a;
    max-width: 950px;
    margin: 0 auto;
    text-align: center;
}

/* Pillars */
.pillars {
    padding: 75px 0;
    background: #f0fdfa;
}

.pillars-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: #0891b2;
}

.pillars-layout {
    display: grid;
    gap: 38px;
}

.pillar {
    background: white;
    padding: 45px;
    border-radius: 18px;
    box-shadow: 0 6px 20px rgba(6,182,212,0.15);
    text-align: center;
    border-top: 5px solid #06b6d4;
}

.pillar-icon {
    font-size: 3.5rem;
    margin-bottom: 22px;
}

.pillar h3 {
    font-size: 1.7rem;
    margin-bottom: 18px;
    color: #0e7490;
}

.pillar p {
    color: #164e63;
    line-height: 1.85;
}

/* Showcase */
.showcase {
    padding: 75px 0;
    background: white;
}

.showcase-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 18px;
    color: #0891b2;
}

.showcase-description {
    text-align: center;
    font-size: 1.12rem;
    color: #164e63;
    margin-bottom: 38px;
}

.game-area {
    background: #e0f2fe;
    padding: 28px;
    border-radius: 18px;
    box-shadow: 0 8px 25px rgba(6,182,212,0.2);
}

.game-embed {
    width: 100%;
    height: 580px;
    border: none;
    border-radius: 12px;
    background: #000;
}

/* Advantages */
.advantages {
    padding: 75px 0;
    background: #f0fdfa;
}

.advantages-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: #0891b2;
}

.advantages-layout {
    display: grid;
    gap: 32px;
}

.advantage {
    background: white;
    padding: 38px;
    border-radius: 15px;
    box-shadow: 0 5px 18px rgba(6,182,212,0.12);
    border-left: 5px solid #0e7490;
}

.advantage h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #0891b2;
}

.advantage p {
    color: #164e63;
    line-height: 1.85;
}

/* Mission */
.mission {
    padding: 75px 0;
    background: white;
}

.mission-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.mission-wrapper h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 28px;
    color: #0891b2;
}

.mission-text {
    font-size: 1.12rem;
    line-height: 1.9;
    color: #134e4a;
    text-align: center;
    margin-bottom: 50px;
}

.mission-metrics {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.metric {
    text-align: center;
    display: flex;
    flex-direction: column;
}

.metric-number {
    font-size: 3.2rem;
    font-weight: 900;
    color: #0891b2;
    font-family: 'Montserrat', sans-serif;
}

.metric-label {
    font-size: 1.05rem;
    color: #164e63;
    margin-top: 10px;
}

/* Footer */
.site-footer {
    background: linear-gradient(135deg, #134e4a 0%, #0f3f3c 100%);
    color: white;
    padding: 60px 25px 28px;
}

.footer-wrapper {
    max-width: 1300px;
    margin: 0 auto;
}

.footer-sections {
    display: grid;
    gap: 45px;
    margin-bottom: 38px;
}

.footer-about h4,
.footer-nav h4,
.footer-resources h4 {
    font-size: 1.45rem;
    margin-bottom: 20px;
    color: #67e8f9;
}

.footer-about p {
    line-height: 1.85;
    color: #99f6e4;
}

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

.footer-links li {
    margin-bottom: 13px;
}

.footer-links a {
    color: #99f6e4;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #67e8f9;
}

.footer-copyright {
    text-align: center;
    padding-top: 28px;
    border-top: 1px solid rgba(255,255,255,0.2);
    color: #99f6e4;
}

/* Age Check Modal */
.modal-age-check {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(19,78,74,0.92);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.modal-age-check.hidden {
    display: none;
}

.modal-box {
    background: white;
    padding: 52px 45px;
    border-radius: 22px;
    max-width: 560px;
    text-align: center;
    box-shadow: 0 18px 55px rgba(0,0,0,0.6);
}

.modal-box h2 {
    font-size: 2.4rem;
    margin-bottom: 28px;
    color: #0891b2;
}

.modal-box p {
    font-size: 1.12rem;
    color: #164e63;
    margin-bottom: 22px;
    line-height: 1.75;
}

.modal-actions {
    display: flex;
    gap: 22px;
    justify-content: center;
    margin-top: 38px;
}

.modal-btn {
    padding: 16px 38px;
    border: none;
    border-radius: 28px;
    font-size: 1.08rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-yes {
    background: #06b6d4;
    color: white;
}

.btn-yes:hover {
    background: #0891b2;
    transform: translateY(-3px);
}

.btn-no {
    background: #dc2626;
    color: white;
}

.btn-no:hover {
    background: #b91c1c;
    transform: translateY(-3px);
}

/* Play Container */
.play-container {
    padding: 75px 25px;
    background: #f0fdfa;
    min-height: 80vh;
}

.play-wrapper {
    max-width: 1300px;
    margin: 0 auto;
}

.play-heading {
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 38px;
    color: #0891b2;
}

.play-guide {
    background: white;
    padding: 32px;
    border-radius: 15px;
    margin-bottom: 38px;
    box-shadow: 0 5px 18px rgba(6,182,212,0.12);
}

.play-guide p {
    color: #164e63;
    line-height: 1.85;
    margin-bottom: 22px;
}

.system-requirements {
    background: #e0f2fe;
    padding: 20px;
    border-radius: 12px;
    color: #0e7490;
    border-left: 5px solid #06b6d4;
}

.play-advice {
    background: white;
    padding: 38px;
    border-radius: 15px;
    margin-top: 38px;
    box-shadow: 0 5px 18px rgba(6,182,212,0.12);
}

.play-advice h2 {
    font-size: 1.95rem;
    margin-bottom: 22px;
    color: #0891b2;
}

.play-advice ul {
    list-style-position: inside;
    color: #164e63;
    line-height: 2.3;
}

/* Document Page */
.document-page {
    padding: 75px 25px;
    background: #f0fdfa;
}

.document-wrapper {
    max-width: 1100px;
    margin: 0 auto;
}

.document-title {
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 18px;
    color: #0891b2;
}

.document-date {
    text-align: center;
    color: #6b7280;
    font-style: italic;
    margin-bottom: 50px;
}

.document-section {
    background: white;
    padding: 38px;
    border-radius: 15px;
    margin-bottom: 32px;
    box-shadow: 0 5px 18px rgba(6,182,212,0.12);
    border-left: 5px solid #06b6d4;
}

.document-section h2 {
    font-size: 1.85rem;
    margin-bottom: 20px;
    color: #0891b2;
}

.document-section p {
    color: #164e63;
    line-height: 1.9;
    margin-bottom: 20px;
}

.document-section ul {
    margin-left: 28px;
    color: #164e63;
    line-height: 2.3;
}

.notice-section {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left-color: #f59e0b;
}

.notice-section h2 {
    color: #92400e;
}

/* Tablet */
@media (min-width: 768px) {
    .pillars-layout {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-layout {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-sections {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .game-embed {
        height: 680px;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .menu-btn {
        display: none;
    }
    
    .site-nav {
        position: static;
        flex-direction: row;
        width: auto;
        background: none;
        box-shadow: none;
        gap: 10px;
    }
    
    .nav-item {
        border-bottom: none;
        padding: 12px 22px;
        border-radius: 8px;
    }
    
    .nav-item:hover {
        padding-left: 22px;
    }
    
    .banner-content h1 {
        font-size: 3.8rem;
    }
    
    .pillars-layout {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .game-embed {
        height: 780px;
    }
}