/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #2c2c2c;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 15px 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #2c2c2c;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #ff6b35;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #ff6b35;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section with YouTube Background */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-video-background {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -3;
    transform: translateX(-50%) translateY(-50%);
}

.hero-video-background iframe {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100vw;
    height: 56.25vw; /* 16:9 aspect ratio */
    min-height: 100vh;
    min-width: 177.78vh; /* 16:9 aspect ratio */
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg, 
        rgba(102, 126, 234, 0.7) 0%, 
        rgba(118, 75, 162, 0.7) 50%,
        rgba(255, 107, 53, 0.6) 100%
    );
    z-index: -2;
}

.hero-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        circle at center,
        transparent 30%,
        rgba(0, 0, 0, 0.3) 100%
    );
}

.film-grain {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.15;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.03) 2px,
            rgba(255, 255, 255, 0.03) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.03) 2px,
            rgba(0, 0, 0, 0.03) 4px
        );
    animation: grain 0.2s steps(10) infinite;
    z-index: -1;
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -10%); }
    20% { transform: translate(-15%, 5%); }
    30% { transform: translate(7%, -25%); }
    40% { transform: translate(-5%, 25%); }
    50% { transform: translate(-15%, 10%); }
    60% { transform: translate(15%, 0%); }
    70% { transform: translate(0%, 15%); }
    80% { transform: translate(3%, 35%); }
    90% { transform: translate(-10%, 10%); }
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    color: white;
    z-index: 2;
    position: relative;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 0.5s;
}

.highlight {
    background: linear-gradient(45deg, #ff6b35, #f7931e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.3rem);
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 300;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 0.8s;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.1s;
}

.btn-primary, .btn-secondary {
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(45deg, #ff6b35, #f7931e);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-2px);
}

.btn-primary.large, .btn-secondary.large {
    padding: 18px 40px;
    font-size: 18px;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeIn 1s ease forwards 1.5s;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid rgba(255, 255, 255, 0.8);
    border-bottom: 2px solid rgba(255, 255, 255, 0.8);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(45deg);
    }
    40% {
        transform: translateY(-10px) rotate(45deg);
    }
    60% {
        transform: translateY(-5px) rotate(45deg);
    }
}

/* About Section */
.about {
    padding: 120px 0;
    background: 
        linear-gradient(rgba(250, 250, 250, 0.95), rgba(250, 250, 250, 0.95)),
        url('https://images.unsplash.com/photo-1606983340126-99ab4feaa64a?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80') center/cover;
    background-attachment: fixed;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-paragraph {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 30px;
    color: #4a4a4a;
    font-weight: 300;
}

.about-paragraph.final {
    font-size: 20px;
    color: #2c2c2c;
}

.about-paragraph strong {
    color: #ff6b35;
    font-weight: 500;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.camera-icon {
    width: 120px;
    height: 120px;
    color: #ff6b35;
    opacity: 0.8;
}

.camera-icon svg {
    width: 100%;
    height: 100%;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: 20px;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #2c2c2c;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Slogan Section */
.slogan {
    padding: 120px 0;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    text-align: center;
}

.slogan-text {
    font-size: clamp(2rem, 4vw, 3.5rem);
    line-height: 1.3;
    font-weight: 300;
    margin: 0 auto;
    max-width: 800px;
}

.slogan-highlight {
    font-weight: 700;
    background: linear-gradient(45deg, #ff6b35, #f7931e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: 
        linear-gradient(rgba(248, 249, 250, 0.9), rgba(248, 249, 250, 0.9)),
        url('https://images.unsplash.com/photo-1478720568477-152d9b164e26?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80') center/cover;
    background-attachment: fixed;
    text-align: center;
}

.cta-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    margin-bottom: 20px;
    color: #2c2c2c;
    font-weight: 600;
}

.cta-subtitle {
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
    font-weight: 300;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: #2c2c2c;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-logo {
    font-size: 18px;
    font-weight: 700;
}

.footer-info p {
    margin-bottom: 5px;
    color: #ccc;
    font-size: 14px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-video-background iframe {
        width: 100vw;
        height: 177.78vw; /* 16:9 aspect ratio for mobile */
        min-height: 100vh;
        min-width: 100vw;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 280px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 30px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .slogan-text {
        padding: 0 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content {
        padding: 0 15px;
    }
    
    .about {
        padding: 80px 0;
    }
    
    .features {
        padding: 60px 0;
    }
    
    .slogan {
        padding: 80px 0;
    }
    
    .cta {
        padding: 60px 0;
    }
}