/* 1. Base Reset & Typography */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: linear-gradient(180deg, #0f172a 0%, #020617 50%, #000000 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: #ffffff;
    font-family: 'Inter', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; }

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 2. Header */
.header {
    padding: 30px 0;
}

.header-container {
    display: flex;
    justify-content: flex-start;
}

.header-logo {
    /* [수정] 로고 크기 확대 (50px -> 65px) */
    height: 65px;
    width: auto;
    display: block;
}

/* 3. Hero Section */
.hero-section {
    padding-bottom: 40px;
}

.hero-card {
    position: relative;
    width: 100%;
    height: 600px;
    border-radius: 30px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
}

.video-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
}

.video-bg video {
    width: 100%; height: 100%;
    object-fit: cover;
}

.overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.4);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
}

.headline {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 20px;
    color: #ffffff;
    text-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.subheadline {
    font-size: 1.2rem;
    color: #e2e8f0;
    font-weight: 400;
    margin-bottom: 40px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* Button Style */
.btn-main {
    display: inline-block;
    background-color: #fff;
    color: #0f172a;
    font-weight: 700;
    padding: 16px 32px;
    border-radius: 100px;
    font-size: 1rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.btn-main:hover {
    transform: scale(1.05);
    background-color: #f1f5f9;
}

/* 4. Feature Section */
.feature-section {
    padding: 20px 0 30px 0;
}

.feature-card-item {
    display: flex;
    align-items: center;
    gap: 60px;
    background: rgba(15, 23, 42, 0.6); 
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 60px;
    backdrop-filter: blur(12px);
}

.text-content {
    flex: 1;
    text-align: left;
}

.badge {
    display: inline-block;
    color: #60a5fa;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.text-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    color: #fff;
}

.description {
    font-size: 1.1rem;
    color: #cbd5e1;
    line-height: 1.6;
}

.description strong {
    color: #fff;
}

.image-content {
    flex: 1.2;
}

.image-content img {
    width: 100%;
    border-radius: 12px;
    display: block;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* 5. Footer */
.footer {
    padding: 20px 0 60px 0;
    text-align: center;
    color: #64748b;
    font-size: 0.85rem;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 20px;
}

.footer-content p {
    margin: 6px 0;
}

.company-name {
    font-weight: 600;
    color: #94a3b8;
}

/* Mobile Response */
@media (max-width: 768px) {
    .hero-card { height: 500px; }
    .headline { font-size: 2.8rem; }
    .feature-card-item {
        flex-direction: column;
        padding: 30px;
        gap: 40px;
    }
    .text-content { text-align: center; }
}