:root {
    --bg-color: #fdfbfb;
    --primary-color: #e74c3c;
    --secondary-color: #2980b9;
    --text-color: #2c3e50;
    --text-muted: #7f8c8d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans JP', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* Background Effects */
.background-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: radial-gradient(#bdc3c7 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.3;
    z-index: -1;
}

/* Hero Section */
.hero-section {
    min-height: 80vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.1) 0%, rgba(253, 251, 251, 0) 100%);
}

.hero-content {
    max-width: 800px;
    animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-icon {
    font-size: 6rem;
    margin-bottom: 20px;
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-15px);
    }
}

.title {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--text-color);
    margin-bottom: 15px;
    text-shadow: 2px 2px 0 #fff;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    font-weight: 700;
}

/* Button */
.cta-container {
    margin-top: 30px;
}

.play-btn {
    display: inline-block;
    padding: 20px 40px;
    background-color: var(--primary-color);
    color: #fff;
    font-size: 1.8rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 50px;
    box-shadow: 0 5px 0 #c0392b, 0 10px 20px rgba(231, 76, 60, 0.3);
    transition: all 0.2s;
}

.play-btn:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 7px 0 #962d22, 0 15px 25px rgba(231, 76, 60, 0.4);
}

.play-btn:active {
    transform: translateY(5px);
    box-shadow: 0 0 0 #962d22;
}

.free-text {
    margin-top: 15px;
    font-size: 1rem;
    color: var(--text-muted);
}

/* Features Section */
.features {
    padding: 80px 20px;
    background: #fff;
    position: relative;
    z-index: 10;
    border-top: 1px solid #eee;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-color);
}

.feature-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.card {
    background: #fdfbfb;
    border: 1px solid #ecf0f1;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    flex: 1;
    min-width: 280px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

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

.card .icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.card h3 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.card p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Bottom CTA */
.bottom-cta {
    padding: 80px 20px;
    text-align: center;
    background: linear-gradient(135deg, rgba(41, 128, 185, 0.1) 0%, rgba(253, 251, 251, 0) 100%);
    position: relative;
    z-index: 10;
}

.bottom-cta h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--text-color);
}

/* Footer */
footer {
    text-align: center;
    padding: 30px;
    background: #2c3e50;
    color: #ecf0f1;
    font-size: 1rem;
}

/* Back to Portal Button */
.back-to-portal {
    position: absolute;
    top: 20px;
    left: 20px;
    color: var(--text-color);
    font-size: 1rem;
    text-decoration: none;
    font-weight: bold;
    border: 2px solid var(--text-color);
    padding: 10px 20px;
    border-radius: 50px;
    z-index: 1000;
    transition: 0.3s;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
}

.back-to-portal:hover {
    background: var(--text-color);
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    .title {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .play-btn {
        font-size: 1.2rem;
        padding: 15px 30px;
    }
}

/* Ofuse Floating Button */
.ofuse-floating-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(135deg, #ff4081, #ff79b0);
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 50px;
    font-weight: bold;
    font-size: 0.85rem;
    box-shadow: 0 4px 15px rgba(255, 64, 129, 0.4);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 9999;
    transition: all 0.3s ease;
    font-family: 'Noto Sans JP', sans-serif;
}

.ofuse-floating-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(255, 64, 129, 0.6);
    color: white;
}

.ofuse-icon {
    font-size: 1.2rem;
}