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

body {
    font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
    color: #222;
    background: #fff;
    line-height: 1.6;
}

a {
    text-decoration: none;
}

.header {
    width: 100%;
    padding: 18px 8%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
    background: #fff;
}

.logo img {
    height: 60px;
    display: block;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: #333;
    font-size: 15px;
    font-weight: 500;
}

.main {
    position: relative;
    width: 100%;
    min-height: calc(100vh - 97px);
    overflow: hidden;
    display: flex;
    align-items: center;
    padding: 0 8%;
    color: #fff;
}

.main-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    animation: mainSlide 15s infinite;
    transform: scale(1.08);
}

.slide01 {
    background-image: url('/img/main01.jpg');
    animation-delay: 0s;
}

.slide02 {
    background-image: url('/img/main02.jpg');
    animation-delay: 5s;
}

.slide03 {
    background-image: url('/img/main03.jpg');
    animation-delay: 10s;
}

.main-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        rgba(11, 19, 36, 0.92) 0%,
        rgba(11, 19, 36, 0.75) 45%,
        rgba(11, 19, 36, 0.35) 100%
    );
    z-index: 1;
}

.main-inner {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.main-label {
    display: inline-block;
    margin-bottom: 22px;
    font-size: 14px;
    letter-spacing: 4px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.75);
}

.main h1 {
    font-size: 62px;
    line-height: 1.3;
    margin-bottom: 28px;
    font-weight: 800;
}

.main p {
    font-size: 22px;
    color: #eee;
    margin-bottom: 42px;
}

.main-btns {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 16px 34px;
    border-radius: 10px;
    font-weight: 700;
    transition: 0.3s;
}

.primary-btn {
    background: #fff;
    color: #111827;
}

.primary-btn:hover {
    opacity: 0.9;
}

.sub-btn {
    border: 1px solid rgba(255,255,255,0.3);
    color: #fff;
}

.sub-btn:hover {
    background: rgba(255,255,255,0.1);
}

@keyframes mainSlide {
    0% {
        opacity: 0;
        transform: scale(1.08);
    }

    8% {
        opacity: 1;
    }

    30% {
        opacity: 1;
    }

    40% {
        opacity: 0;
        transform: scale(1);
    }

    100% {
        opacity: 0;
        transform: scale(1.08);
    }
}

.section {
    padding: 100px 8%;
}

.section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.section h2 {
    font-size: 42px;
    margin-bottom: 24px;
    color: #111;
}

.section-text {
    font-size: 19px;
    color: #666;
    margin-bottom: 50px;
}

.service-box {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.card {
    padding: 42px;
    border-radius: 18px;
    background: #f8f8f8;
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    font-size: 24px;
    margin-bottom: 18px;
    color: #111;
}

.card p {
    font-size: 16px;
    color: #666;
}

.contact {
    padding: 120px 8%;
    background: #f3f4f6;
    text-align: center;
}

.contact-inner {
    max-width: 900px;
    margin: 0 auto;
}

.contact h2 {
    font-size: 42px;
    margin-bottom: 20px;
}

.contact p {
    font-size: 18px;
    color: #666;
    margin-bottom: 36px;
}

.footer {
    padding: 36px 8%;
    background: #111827;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    color: #aaa;
    font-size: 14px;
}

@media (max-width: 768px) {

    .header {
        flex-direction: column;
        gap: 18px;
        padding: 16px 6%;
    }

    .logo img {
        height: 52px;
    }

    .nav {
        gap: 18px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav a {
        font-size: 14px;
    }

    .main {
        min-height: 720px;
        padding: 0 6%;
    }

    .main h1 {
        font-size: 40px;
    }

    .main p {
        font-size: 18px;
    }

    .main-label {
        font-size: 12px;
        letter-spacing: 3px;
    }

    .main-btns {
        flex-direction: column;
    }

    .service-box {
        grid-template-columns: 1fr;
    }

    .section h2,
    .contact h2 {
        font-size: 32px;
    }
}