/* 기본 스타일 */
:root {
    --primary-color: #2d3748;
    --secondary-color: #4a5568;
    --accent-color: #3182ce;
    --light-color: #f7fafc;
    --dark-color: #1a202c;
    --gray-color: #a0aec0;
    --success-color: #48bb78;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;
    line-height: 1.6;
    color: var(--secondary-color);
    background-color: var(--light-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* 버튼 스타일 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--dark-color);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
}

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

/* 헤더 스타일 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 0.375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.25rem;
}

.logo-text {
    font-weight: bold;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.desktop-nav {
    display: none;
}

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
        gap: 2rem;
    }

    .desktop-nav a {
        color: var(--secondary-color);
        font-weight: 500;
        transition: var(--transition);
    }

    .desktop-nav a:hover {
        color: var(--primary-color);
    }

    .header-button {
        display: block;
    }

    .mobile-menu-btn {
        display: none;
    }
}

.header-button {
    display: none;
}

.mobile-menu-btn {
    background: none;
    border: none;
    color: var(--secondary-color);
    font-size: 1.25rem;
    cursor: pointer;
}

/* 모바일 네비게이션 */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    z-index: 1001;
    display: none;
    flex-direction: column;
}

.mobile-nav.active {
    display: flex;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-close-btn {
    background: none;
    border: none;
    color: var(--secondary-color);
    font-size: 1.25rem;
    cursor: pointer;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    padding: 2rem 20px;
    gap: 1.5rem;
}

.mobile-nav-links a {
    color: var(--primary-color);
    font-size: 1.25rem;
    font-weight: 500;
}

.mobile-cta {
    margin-top: 1rem;
    width: 100%;
}

/* 히어로 섹션 */
.hero {
    height: 100vh;
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://source.unsplash.com/random/1920x1080/?website');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-image: url(main.png);
    display: flex;
    align-items: center;
    color: white;
    position: relative;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 800px;
}

.hero-text h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

@media (min-width: 768px) {
    .hero-text h1 {
        font-size: 3.5rem;
    }
}

.hero-text p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
    }
}

/* 섹션 공통 스타일 */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--secondary-color);
    max-width: 700px;
    margin: 0 auto;
}

.section-header.light h2,
.section-header.light p {
    color: white;
}

/* 서비스 섹션 */
.services {
    background-color: white;
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background-color: var(--light-color);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.service-icon {
    width: 3.5rem;
    height: 3.5rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.service-card p {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.service-link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.service-link:hover {
    color: var(--accent-color);
}

/* 특징 섹션 */
.features {
    background-image: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8)), url('https://source.unsplash.com/random/1920x1080/?coding');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.feature-card {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-card p {
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.feature-list i {
    color: var(--success-color);
}

/* 가격 섹션 */
.pricing {
    background-color: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.pricing-card {
    background-color: var(--light-color);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border: 2px solid var(--accent-color);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.pricing-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--accent-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header {
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.price {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.period {
    color: var(--gray-color);
}

.pricing-features {
    padding: 2rem;
    flex-grow: 1;
}

.pricing-features ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pricing-features i.fa-check {
    color: var(--success-color);
}

.pricing-features i.fa-times {
    color: var(--gray-color);
}

.pricing-footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

/* 푸터 */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    margin-bottom: 3rem;
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.footer-logo p {
    margin-top: 1rem;
    opacity: 0.8;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 640px) {
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

.footer-link-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    transition: var(--transition);
}

.footer-link-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    font-size: 0.875rem;
}