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

body {
    font-family: 'Roboto', sans-serif;
    background: #ffffff;
    color: #1a1a1a;
    line-height: 1.7;
}

/* Age Verification Modal */
.verify-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    z-index: 100000;
    justify-content: center;
    align-items: center;
}

.verify-modal.active {
    display: flex;
}

.verify-container {
    background: #ffffff;
    padding: 50px 45px;
    border-radius: 10px;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.verify-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.verify-container h2 {
    font-size: 32px;
    font-weight: 700;
    color: #06b6d4;
    margin-bottom: 20px;
}

.verify-container p {
    color: #555;
    margin-bottom: 15px;
    font-size: 16px;
}

.verify-info {
    font-size: 14px;
    color: #888;
}

.verify-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    justify-content: center;
}

.verify-actions button {
    padding: 14px 35px;
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-family: 'Roboto', sans-serif;
    transition: all 0.3s ease;
}

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

.btn-verify:hover {
    background: #0891b2;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.4);
}

.btn-exit {
    background: #e5e5e5;
    color: #666;
}

.btn-exit:hover {
    background: #d4d4d4;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: -280px;
    top: 0;
    width: 280px;
    height: 100vh;
    background: #0e7490;
    z-index: 9999;
    transition: left 0.3s ease;
    overflow-y: auto;
}

.sidebar.open {
    left: 0;
}

.sidebar-header {
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h3 {
    color: white;
    font-size: 28px;
    font-weight: 700;
    margin-top: 10px;
}

.sidebar-nav {
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 400;
}

.nav-item:hover,
.nav-item.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-icon {
    font-size: 22px;
}

.nav-text {
    font-size: 16px;
}

/* Overlay */
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
}

.overlay.active {
    display: block;
}

/* Main Wrapper */
.main-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: white;
    padding: 15px 30px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.menu-btn span {
    width: 26px;
    height: 3px;
    background: #06b6d4;
    transition: 0.3s;
    border-radius: 2px;
}

.menu-btn:hover span {
    background: #0891b2;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 700;
    color: #06b6d4;
}

/* Content */
.content {
    flex: 1;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 50px 30px;
}

/* Hero Section */
.hero-section {
    margin-bottom: 60px;
    padding: 80px 40px;
    background: linear-gradient(135deg, #06b6d4, #0891b2);
    border-radius: 8px;
    text-align: center;
    color: white;
}

.hero-section h1 {
    font-size: 52px;
    font-weight: 300;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-text {
    font-size: 19px;
    font-weight: 300;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Content Block */
.content-block {
    margin-bottom: 60px;
    line-height: 1.9;
}

.content-block h2 {
    font-size: 32px;
    font-weight: 300;
    margin-bottom: 25px;
    color: #06b6d4;
}

.content-block p {
    color: #444;
    margin-bottom: 20px;
}

/* Highlight Boxes */
.highlight-boxes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 60px;
}

.highlight-box {
    padding: 35px;
    border-left: 4px solid;
    background: #f9f9f9;
}

.highlight-box.cyan {
    border-color: #06b6d4;
}

.highlight-box.teal {
    border-color: #14b8a6;
}

.highlight-box.sky {
    border-color: #0284c7;
}

.highlight-title {
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 15px;
    color: #1a1a1a;
}

.highlight-text {
    color: #555;
    line-height: 1.8;
}

/* Critical Info */
.critical-info {
    margin-bottom: 60px;
}

.critical-info h2 {
    font-size: 32px;
    font-weight: 300;
    margin-bottom: 30px;
    color: #06b6d4;
    text-align: center;
}

.info-panels {
    display: grid;
    gap: 25px;
}

.info-panel {
    padding: 35px;
    border-radius: 5px;
    border-left: 5px solid;
}

.info-panel h3 {
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 15px;
}

.info-panel p {
    line-height: 1.9;
    color: #444;
}

.red-panel {
    background: #fef2f2;
    border-color: #ef4444;
}

.red-panel h3 {
    color: #dc2626;
}

.blue-panel {
    background: #eff6ff;
    border-color: #3b82f6;
}

.blue-panel h3 {
    color: #2563eb;
}

.orange-panel {
    background: #fff7ed;
    border-color: #f97316;
}

.orange-panel h3 {
    color: #ea580c;
}

/* Game Section */
.game-section {
    margin-bottom: 60px;
}

.game-section h2 {
    font-size: 32px;
    font-weight: 300;
    margin-bottom: 15px;
    color: #06b6d4;
    text-align: center;
}

.game-description {
    text-align: center;
    color: #666;
    margin-bottom: 40px;
    font-size: 17px;
}

.game-wrapper {
    margin-bottom: 30px;
}

.game-frame {
    width: 100%;
    max-width: 950px;
    margin: 0 auto;
    background: #f5f5f5;
    border-radius: 5px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

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

.game-details {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: 15px;
}

.detail-item {
    padding: 20px;
    background: #f9f9f9;
    border-radius: 5px;
    color: #555;
}

.detail-item strong {
    color: #06b6d4;
}

/* Principles Section */
.principles-section {
    margin-bottom: 60px;
}

.principles-section h2 {
    font-size: 32px;
    font-weight: 300;
    margin-bottom: 40px;
    color: #06b6d4;
    text-align: center;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.principle-card {
    padding: 35px;
    border: 2px solid #e5e5e5;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.principle-card:hover {
    border-color: #06b6d4;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.principle-number {
    font-size: 48px;
    font-weight: 100;
    color: #06b6d4;
    margin-bottom: 15px;
}

.principle-card h3 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 12px;
    color: #1a1a1a;
}

.principle-card p {
    color: #555;
    line-height: 1.8;
}

/* Responsibility Block */
.responsibility-block {
    padding: 40px;
    background: #f9f9f9;
    border-radius: 5px;
    margin-bottom: 60px;
    text-align: center;
}

.responsibility-block h2 {
    font-size: 30px;
    font-weight: 400;
    margin-bottom: 20px;
    color: #06b6d4;
}

.responsibility-block p {
    color: #555;
    line-height: 1.9;
    max-width: 850px;
    margin: 0 auto;
}

/* Footer */
.footer {
    background: #0e7490;
    color: rgba(255, 255, 255, 0.9);
    padding: 50px 30px 25px;
    margin-top: auto;
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 500;
    color: white;
    margin-bottom: 15px;
}

.footer-section p {
    font-size: 14px;
    line-height: 1.8;
}

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

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

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
}

/* Legal Document */
.legal-document {
    max-width: 850px;
    margin: 0 auto;
    line-height: 1.9;
}

.legal-document h1 {
    font-size: 42px;
    font-weight: 300;
    color: #06b6d4;
    margin-bottom: 10px;
}

.doc-date {
    color: #999;
    font-size: 14px;
    margin-bottom: 40px;
}

.legal-document h2 {
    font-size: 26px;
    font-weight: 400;
    color: #1a1a1a;
    margin-top: 40px;
    margin-bottom: 15px;
}

.legal-document h3 {
    font-size: 20px;
    font-weight: 500;
    color: #444;
    margin-top: 25px;
    margin-bottom: 12px;
}

.legal-document p {
    color: #555;
    margin-bottom: 15px;
}

.legal-document ul {
    margin-left: 30px;
    margin-bottom: 20px;
}

.legal-document ul li {
    color: #555;
    margin-bottom: 10px;
}

.terms-box {
    background: #f0f9ff;
    padding: 30px;
    border-radius: 5px;
    margin-top: 40px;
    border-left: 4px solid #06b6d4;
}

.terms-box h3 {
    color: #06b6d4;
    font-size: 22px;
    margin-bottom: 15px;
}

.alert-box {
    background: #fef3c7;
    padding: 30px;
    border-radius: 5px;
    margin-bottom: 30px;
    border-left: 4px solid #f59e0b;
}

.alert-box h2 {
    color: #d97706;
    font-size: 26px;
    margin: 0 0 15px 0;
}

.acceptance-box {
    background: #06b6d4;
    color: white;
    padding: 30px;
    border-radius: 5px;
    text-align: center;
    margin-top: 40px;
}

.acceptance-box p {
    color: white;
    font-size: 15px;
    font-weight: 500;
    margin: 0;
}

/* Page Title */
.page-title {
    text-align: center;
    margin-bottom: 50px;
}

.page-title h1 {
    font-size: 46px;
    font-weight: 300;
    color: #06b6d4;
    margin-bottom: 15px;
}

.page-title p {
    font-size: 18px;
    color: #666;
}

/* Instructions Section */
.instructions-section {
    margin-bottom: 60px;
}

.instructions-section h2 {
    font-size: 32px;
    font-weight: 300;
    margin-bottom: 35px;
    color: #06b6d4;
    text-align: center;
}

.instruction-blocks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.instruction-block {
    padding: 30px;
    background: #f9f9f9;
    border-radius: 5px;
}

.instruction-block h3 {
    font-size: 20px;
    font-weight: 500;
    color: #06b6d4;
    margin-bottom: 12px;
}

.instruction-block p {
    color: #555;
    line-height: 1.8;
}

.play-notice {
    padding: 40px;
    background: #f0f9ff;
    border-radius: 5px;
    text-align: center;
    border-left: 4px solid #06b6d4;
}

.play-notice h2 {
    font-size: 28px;
    font-weight: 400;
    color: #06b6d4;
    margin-bottom: 15px;
}

.play-notice p {
    color: #555;
    line-height: 1.9;
    max-width: 800px;
    margin: 0 auto;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        padding: 50px 25px;
    }

    .hero-section h1 {
        font-size: 36px;
    }

    .hero-text {
        font-size: 17px;
    }

    .game-frame iframe {
        height: 450px;
    }

    .content {
        padding: 40px 20px;
    }

    .legal-document h1 {
        font-size: 32px;
    }

    .verify-container {
        margin: 20px;
        padding: 40px 30px;
    }

    .verify-actions {
        flex-direction: column;
        gap: 10px;
    }

    .verify-actions button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-section h1 {
        font-size: 30px;
    }

    .game-frame iframe {
        height: 350px;
    }

    .page-title h1 {
        font-size: 36px;
    }
}