html, body {
    font-size: 16px;
}
:root {
    --primary-color: #00559D;
    --secondary-color: #764ba2;
    --text-dark: #333;
    --bg-gray: #f5f5f5;
    --border-color: #ddd;
}
/* ========================================
   히어로 섹션 (index.html)
======================================== */
.hero {
    background: linear-gradient(135deg, #00559D 0%, #764ba2 100%);
    padding: 80px 40px 60px;
    text-align: center;
    color: white;
    min-height: calc(100vh - 72px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
    animation: fadeInDown 0.8s ease;
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: 60px;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 800px;
    margin: 0 auto 60px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.feature {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s, background 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.feature h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.feature p {
    opacity: 0.9;
    font-size: 1rem;
}

.cta-button {
    display: inline-block;
    background: white;
    color: #667eea !important;
    padding: 18px 48px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background-color: #667eea;
    color: white !important;
}

.info-box {
    background: rgba(255, 255, 255, 0.15);
    padding: 30px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.info-box h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
    text-align: center;
}

.info-box li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    line-height: 1.6;
}

.info-box li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #fff;
    font-weight: bold;
    font-size: 1.2rem;
}

/* ========================================
   애니메이션
======================================== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

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

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

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


/* ========================================
   반응형 - 작은 모바일 (480px 이하)
======================================== */
@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.6rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .feature {
        padding: 25px 20px;
    }

    .feature-icon {
        font-size: 2rem;
    }

    .feature h3 {
        font-size: 1rem;
    }

    .feature p {
        font-size: 0.9rem;
    }

    .cta-button {
        padding: 10px 25px;
        font-size: 0.95rem;
    }

    .info-box {
        padding: 18px;
    }

    .info-box li {
        font-size: 0.85rem;
    }
}