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

:root {
    --primary-black: #0a0a0a;
    --secondary-gray: #666666;
    --light-gray: #f0f0f0;
    --accent-gray: #e8e8e8;
    --white: #ffffff;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: '본고딕', 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: var(--primary-black);
    background-color: var(--light-gray);
    overflow-x: hidden;
}

/* Navigation */
.navbar {
    /* position: fixed; */
    /* top: 0; */
    /* left: 0; */
    /* right: 0; */
    /* z-index: 1000; */
    background: transparent;
    /* backdrop-filter: blur(20px); */
    /* border-bottom: 1px solid rgba(0, 0, 0, 0.1); */
    padding: 20px 0;
    /* transition: var(--transition); */
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.logo-full {
    height: 32px;
    width: auto;
}

.logo-short {
    display: none;
    height: 32px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--primary-black);
    font-size: 16px;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--secondary-gray);
}

.nav-cta {
    background: var(--primary-black);
    color: var(--white);
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    padding: 120px 0 80px;
    display: flex;
    align-items: center;
    background: var(--light-gray);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.hero-tag,
.about-tag,
.services-tag,
.projects-tag,
.articles-tag,
.contact-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--secondary-gray);
    font-weight: 500;
}

.plus-icon {
    font-size: 16px;
    color: var(--primary-black);
}

.hero-title {
    font-family: '열린고딕', 'Yeolrin Gothic', sans-serif;
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--primary-black);
    letter-spacing: -0.02em;
    background: none !important;
    background-image: none !important;
    background-clip: unset !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: unset !important;
}

.hero-cta {
    background: var(--primary-black);
    color: var(--white);
    padding: 16px 32px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    font-family: inherit;
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.arrow {
    font-size: 18px;
    transition: var(--transition);
}

.hero-cta:hover .arrow {
    transform: translateX(4px);
}

.trust-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.trust-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--secondary-gray);
}

.checkmark {
    color: var(--primary-black);
    font-weight: bold;
}

.trust-logos {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.trust-logo {
    height: 24px;
    width: auto;
    opacity: 0.6;
    transition: var(--transition);
}

.trust-logo:hover {
    opacity: 1;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.portrait-img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

/* About Section */
.about-section {
    padding: 120px 0;
    background: var(--white);
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.about-title {
    font-family: '열린고딕', 'Yeolrin Gothic', sans-serif;
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 600;
    line-height: 1.2;
    color: var(--primary-black);
    max-width: 800px;
}

.about-description {
    font-size: 18px;
    line-height: 1.7;
    color: var(--secondary-gray);
    max-width: 600px;
}

/* Services Section */
.services-section {
    padding: 120px 0;
    background: var(--light-gray);
}

.services-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.services-title {
    font-family: '열린고딕', 'Yeolrin Gothic', sans-serif;
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    margin-bottom: 60px;
    color: var(--primary-black);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.service-card {
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.service-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--primary-black);
}

.service-card p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--secondary-gray);
}

/* Projects Section */
.projects-section {
    padding: 120px 0;
    background: var(--white);
}

.projects-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.projects-title {
    font-family: '열린고딕', 'Yeolrin Gothic', sans-serif;
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    margin-bottom: 60px;
    color: var(--primary-black);
}

.projects-grid {
    display: flex;
    flex-direction: row;
    gap: 40px;
    justify-content: flex-start;
    align-items: stretch;
    flex-wrap: nowrap;
}

.project-card {
    background: var(--light-gray);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.project-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin: 24px 32px 8px;
    color: var(--primary-black);
}

.project-card p {
    font-size: 16px;
    color: var(--secondary-gray);
    margin: 0 32px 32px;
    line-height: 1.5;
}

/* Articles Section */
.articles-section {
    padding: 120px 0;
    background: var(--light-gray);
}

.articles-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.articles-title {
    font-family: '열린고딕', 'Yeolrin Gothic', sans-serif;
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    margin-bottom: 60px;
    color: var(--primary-black);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.article-card {
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.08);
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.article-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--primary-black);
}

.article-card p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--secondary-gray);
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary-black);
    font-weight: 500;
    font-size: 16px;
    transition: var(--transition);
}

.article-card:hover .read-more {
    color: var(--secondary-gray);
}

/* Contact Section */
.contact-section {
    padding: 120px 0;
    background: var(--white);
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 40px;
    text-align: center;
}

.contact-title {
    font-family: '열린고딕', 'Yeolrin Gothic', sans-serif;
    font-size: clamp(36px, 5vw, 48px);
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--primary-black);
}

.contact-description {
    font-size: 18px;
    line-height: 1.7;
    color: var(--secondary-gray);
    margin-bottom: 48px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.contact-email {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-black);
    text-decoration: none;
    transition: var(--transition);
}

.contact-email:hover {
    color: var(--secondary-gray);
}

.contact-social {
    display: flex;
    gap: 32px;
}

.social-link {
    color: var(--secondary-gray);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-black);
}

/* 404 Error Page */
.error-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-gray);
    padding: 80px 40px;
}

.error-container {
    text-align: center;
    max-width: 600px;
}

.error-code {
    font-size: 18px;
    color: var(--secondary-gray);
    margin-bottom: 32px;
    font-weight: 500;
}

.error-title {
    font-family: '열린고딕', 'Yeolrin Gothic', sans-serif;
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--primary-black);
    margin-bottom: 48px;
    letter-spacing: -0.02em;
}

.back-home {
    background: var(--primary-black);
    color: var(--white);
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.back-home:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.back-home:hover .arrow {
    transform: translateX(4px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .nav-link {
        font-size: 14px;
    }
    
    .logo-full {
        display: none;
    }
    
    .logo-short {
        display: block;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
        padding: 0 20px;
    }
    
    .hero-section {
        padding: 100px 0 60px;
    }
    
    .about-container,
    .services-container,
    .projects-container,
    .articles-container,
    .contact-container {
        padding: 0 20px;
    }
    
    .services-grid,
    .projects-grid,
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .service-card,
    .article-card {
        padding: 32px 24px;
    }
    
    .trust-logos {
        justify-content: center;
    }
    
    .contact-social {
        gap: 24px;
    }
    
    .hero-title,
    .about-title,
    .services-title,
    .projects-title,
    .articles-title,
    .contact-title {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: 16px;
    }
    
    .nav-cta {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .hero-cta,
    .back-home {
        padding: 14px 28px;
        font-size: 15px;
    }
    
    .service-card,
    .article-card {
        padding: 24px;
    }
    
    .project-card h3 {
        margin: 20px 24px 8px;
    }
    
    .project-card p {
        margin: 0 24px 24px;
    }
    
    .trust-logos {
        gap: 16px;
    }
    
    .trust-logo {
        height: 20px;
    }
}

/* Smooth animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scale-in {
    opacity: 0;
    transform: scale(0.8);
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}