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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', '맑은 고딕', 'Malgun Gothic', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #e8e8e8;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    padding: 25px 0;
    text-align: center;
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.logo {
    font-size: 2.5rem;
    font-weight: 600;
    color: #f4d03f;
    text-shadow: 0 2px 10px rgba(244, 208, 63, 0.3);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.tagline {
    font-size: 1rem;
    color: #b8b8b8;
    font-weight: 300;
    letter-spacing: 0.5px;
}

/* Hero Section */
.hero {
    padding: 100px 0;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, #0f3460 0%, #16213e 50%, #1a1a2e 100%);
}

.mobile-preview {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
}

.mobile-frame {
    width: 200px;
    height: 400px;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    border-radius: 25px;
    padding: 10px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
    animation: float 4s ease-in-out infinite;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

.mobile-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.game-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.video-placeholder {
    color: white;
    text-align: center;
    font-size: 0.9rem;
    line-height: 1.4;
    padding: 1rem;
}

.video-placeholder small {
    color: #BBDEFB;
    font-size: 0.7rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 25px;
    color: #ffffff;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #d0d0d0;
    font-weight: 300;
    letter-spacing: 0.3px;
}

.hero-download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 40px;
    flex-wrap: wrap;
}

/* Problem Section - 다크 그레이 배경 */
.problem-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #1e1e2e 0%, #252538 100%);
    color: #e8e8e8;
}

.problem-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #f4d03f;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.problem-section .features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
    padding: 0;
    background: transparent;
}

.problem-section .feature-card {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(244, 208, 63, 0.2);
    position: relative;
    overflow: hidden;
    color: #e8e8e8;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.problem-section .feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(244, 208, 63, 0.2);
    border-color: rgba(244, 208, 63, 0.5);
}

.problem-section .feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.problem-section .feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #f4d03f;
    font-weight: 600;
}

.problem-section .feature-card p {
    opacity: 0.9;
    line-height: 1.7;
    color: #c0c0c0;
    font-size: 0.95rem;
}

/* Screenshots Section - 다크 네이비 배경 */
.screenshots {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f3460 0%, #16213e 100%);
    color: white;
}

.screenshots h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 60px;
    color: #ffffff;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.screenshots-subtitle {
    text-align: center;
    font-size: 1.5rem;
    margin-top: 40px;
    color: #d0d0d0;
    font-weight: 300;
    line-height: 1.6;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.screenshot-item {
    text-align: center;
    background: rgba(44, 62, 80, 0.6);
    border-radius: 15px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(244, 208, 63, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 200px;
    margin: 0 auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.screenshot-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(244, 208, 63, 0.2);
    border-color: rgba(244, 208, 63, 0.4);
}

.screenshot-image {
    width: 100%;
    height: 300px;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 1rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.screenshot-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.screenshot-image:hover img {
    transform: scale(1.05);
}

.screenshot-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: white;
}

.screenshot-item p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.4;
}

/* Game Features Section - 다크 그레이 배경 */
.game-features {
    padding: 100px 0;
    background: linear-gradient(135deg, #1e1e2e 0%, #252538 100%);
    color: #e8e8e8;
}

.game-features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #f4d03f;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.game-features .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.game-features .feature-card {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(244, 208, 63, 0.2);
    position: relative;
    overflow: hidden;
    color: #e8e8e8;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.game-features .feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(244, 208, 63, 0.2);
    border-color: rgba(244, 208, 63, 0.5);
}

.game-features .feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.game-features .feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #f4d03f;
    font-weight: 600;
}

.game-features .feature-card p {
    opacity: 0.9;
    line-height: 1.7;
    color: #c0c0c0;
    font-size: 0.95rem;
}

/* Testimonials Section - 다크 네이비 배경 */
.testimonials {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f3460 0%, #16213e 100%);
    color: #e8e8e8;
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #f4d03f;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.testimonial-item {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(244, 208, 63, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(244, 208, 63, 0.2);
    border-color: rgba(244, 208, 63, 0.4);
}

.testimonial-item p {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1rem;
    font-style: italic;
    color: #e8e8e8;
}

.testimonial-author {
    font-size: 0.9rem;
    opacity: 0.8;
    color: #f4d03f;
    font-weight: 500;
}

/* Download Section - 다크 그레이 배경 */
.download-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #1e1e2e 0%, #252538 100%);
    color: #e8e8e8;
    text-align: center;
}

.download-section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #f4d03f;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.download-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #ffffff;
    font-weight: 500;
}

.download-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #d0d0d0;
    opacity: 0.9;
    line-height: 1.6;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #f4d03f 0%, #f39c12 100%);
    border-radius: 12px;
    text-decoration: none;
    color: #1a1a2e;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 60px;
    width: 180px;
    box-shadow: 0 4px 15px rgba(244, 208, 63, 0.3);
    border: 1px solid rgba(244, 208, 63, 0.5);
    font-weight: 600;
}

.download-btn:hover {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(244, 208, 63, 0.4);
}

.app-store-btn,
.google-play-btn {
    display: inline-block;
    text-decoration: none;
    transition: all 0.3s ease;
}

.app-store-btn img,
.google-play-btn img {
    height: 60px;
    width: 180px;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: #fff;
    padding: 0;
}

.app-store-btn:hover img,
.google-play-btn:hover img {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(244, 208, 63, 0.3);
}

/* Footer */
.footer {
    padding: 40px 0;
    text-align: center;
    background: linear-gradient(135deg, #0f3460 0%, #16213e 100%);
    color: #b8b8b8;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Subtle animations */
.bounce-in {
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    0% { transform: translateY(30px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .problem-section .features,
    .game-features .features-grid {
        grid-template-columns: 1fr;
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .problem-section h2,
    .screenshots h2,
    .game-features h2,
    .testimonials h2 {
        font-size: 2rem;
    }

    .screenshots-subtitle {
        font-size: 1.5rem;
    }
}