/* Game Sections Styles */

/* Story Section */
.story-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--darker-color) 0%, var(--dark-color) 50%, var(--darker-color) 100%);
    position: relative;
    overflow: hidden;
}

.story-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" patternUnits="userSpaceOnUse" width="100" height="100"><circle cx="50" cy="50" r="1" fill="%23d4af37" opacity="0.03"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.story-content {
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

.story-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease;
}

.story-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.story-card.reverse {
    direction: rtl;
}

.story-card.reverse .story-text {
    direction: ltr;
}

.story-image {
    position: relative;
    height: 500px;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    transition: all 0.6s ease;
}

.story-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: opacity 0.6s ease;
    z-index: 2;
    mix-blend-mode: overlay;
}

.story-image:hover::before {
    opacity: 0.2;
}

.story-image:hover {
    transform: scale(1.02) rotateY(2deg);
    box-shadow: 0 30px 80px rgba(212, 175, 55, 0.3);
}

.parallax-img {
    width: 100%;
    height: 140%; /* Giảm xuống để tối ưu performance */
    object-fit: cover;
    object-position: center top; /* Luôn bắt đầu từ đầu ảnh */
    will-change: transform; /* GPU optimization */
    transform: translate3d(0, 0, 0); /* Force GPU layer, bắt đầu từ 0% */
    transition: transform 0.8s cubic-bezier(0.23, 1, 0.32, 1); /* Smoother easing */
    filter: brightness(0.9) contrast(1.1);
    contain: layout style paint; /* CSS containment cho performance */
}

/* Scroll Animation States - Bắt đầu từ đầu ảnh */
.story-image.scroll-start .parallax-img {
    transform: translate3d(0, -5%, 0); /* Nhẹ nhàng từ đầu ảnh */
}

.story-image.scroll-progress .parallax-img {
    transform: translate3d(0, -20%, 0); /* Trung bình */
    filter: brightness(1) contrast(1.2);
}

.story-image.scroll-complete .parallax-img {
    transform: translate3d(0, -35%, 0); /* Giảm xuống để tránh quá mức */
    filter: brightness(1.05) contrast(1.25);
}

.story-image:hover .parallax-img {
    transform: translate3d(0, -15%, 0) scale(1.02); /* Hover nhẹ nhàng hơn */
    filter: brightness(1.1) contrast(1.3) saturate(1.05);
    transition: transform 0.4s ease-out; /* Nhanh hơn cho hover */
}

.story-text {
    padding: 2rem;
}

.story-text h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 2rem;
    position: relative;
}

.story-text h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.story-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-muted);
}

/* Characters Section */
.characters-section {
    padding: var(--section-padding);
    background: var(--dark-color);
    position: relative;
}

.characters-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(255, 107, 53, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.characters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.character-card {
    position: relative;
    border-radius: 25px;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(212, 175, 55, 0.1), rgba(255, 107, 53, 0.05));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 175, 55, 0.2);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    opacity: 0;
    transform: translateY(50px) scale(0.9);
}

.character-card.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.character-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 80px rgba(212, 175, 55, 0.2);
    border-color: var(--primary-color);
}

.character-image {
    position: relative;
    height: 400px;
    overflow: hidden;
}

.character-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top; /* Đảm bảo hiển thị từ đầu ảnh */
    transition: all 0.8s ease;
    filter: sepia(20%) saturate(1.2) contrast(1.1);
}

.character-card:hover .character-image img {
    transform: scale(1.1);
    filter: sepia(0%) saturate(1.4) contrast(1.2);
}

.character-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    padding: 2rem;
    transform: translateY(100px);
    transition: all 0.6s ease;
}

.character-card:hover .character-overlay {
    transform: translateY(0);
}

.character-overlay h4 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.character-overlay p {
    color: var(--text-muted);
    font-size: 1rem;
    margin: 0;
}

/* Gameplay Section */
.gameplay-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--dark-color) 0%, var(--darker-color) 100%);
    position: relative;
}

.gameplay-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.feature-card {
    background: linear-gradient(145deg, rgba(212, 175, 55, 0.05), rgba(255, 107, 53, 0.03));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 175, 55, 0.1);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.1), transparent);
    transition: left 0.8s ease;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 60px rgba(212, 175, 55, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
    filter: sepia(100%) saturate(200%) hue-rotate(35deg);
    transition: all 0.6s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.2) rotateY(360deg);
    filter: sepia(100%) saturate(200%) hue-rotate(0deg);
}

.feature-card h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
}

/* Download Section */
.download-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--darker-color) 0%, var(--dark-color) 50%, var(--darker-color) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(212, 175, 55, 0.1), transparent, rgba(255, 107, 53, 0.1), transparent);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

.download-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.download-content h2 {
    color: var(--primary-color);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 1.5rem;
    text-shadow: 0 0 30px rgba(212, 175, 55, 0.5);
}

.download-content p {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: var(--text-muted);
}

.download-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--darker-color);
    padding: 3rem 0 1rem;
    border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section p,
.footer-section li {
    color: var(--text-muted);
    line-height: 1.6;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(212, 175, 55, 0.1);
}

.footer-bottom p {
    color: var(--text-muted);
    margin: 0;
}

/* Animations */
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design với Vietnamese Font Optimization */
@media (max-width: 768px) {
    .story-card {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .story-card.reverse {
        direction: ltr;
    }
    
    .story-image {
        height: 350px;
        margin: 0 auto;
        max-width: 400px;
    }
    
    .parallax-img {
        height: 120%; /* Giảm height trên mobile cho performance */
        transform: translateY(-5%);
    }
    
    .story-image.scroll-progress .parallax-img {
        transform: translateY(-15%);
    }
    
    .story-image.scroll-complete .parallax-img {
        transform: translateY(-25%);
    }
    
    .story-text {
        padding: 1.5rem;
    }
    
    .story-text h3 {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .story-text p {
        font-size: 1rem;
        line-height: 1.7;
        text-align: left;
    }
    
    .characters-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    
    .gameplay-features {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .story-text {
        padding: 1rem;
    }
    
    .story-text h3 {
        font-size: 1.6rem;
        margin-bottom: 1rem;
    }
    
    .story-text p {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .story-image {
        height: 280px;
        border-radius: 15px;
    }
    
    .feature-card {
        padding: 2rem 1.5rem;
    }
    
    .character-card {
        margin: 0 1rem;
    }
    
    .character-image {
        height: 300px;
    }
}

/* Enhanced typography cho Vietnamese text */
@media (prefers-reduced-motion: no-preference) {
    .story-text h3 {
        animation: fadeInUp 0.8s ease-out 0.3s both;
    }
    
    .story-text p {
        animation: fadeInUp 0.8s ease-out 0.5s both;
    }
}

/* High contrast support */
@media (prefers-contrast: high) {
    .story-image::before {
        opacity: 0.1 !important;
    }
    
    .parallax-img {
        filter: contrast(1.4) brightness(1.1) !important;
    }
}