/* ===================================
   Korean Flag Themed Translation Website
   Colors: Deep Navy Blue (#1a2332) & Crimson Red (#dc143c)
   =================================== */

/* ===== CSS RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Korean Flag Colors */
    --primary-navy: #1a2332;
    --primary-crimson: #c41230;
    --crimson-hover: #a00f27;

    /* Supporting Colors */
    --white: #ffffff;
    --light-gray: #d3cece;
    --medium-gray: #e1e8ed;
    --text-gray: #4a5568;
    --border-color: #cbd5e0;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --section-padding: 5rem 0;
    --container-padding: 0 1.5rem;

    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--primary-navy);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(26, 35, 50, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-navy);
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo:hover {
    color: var(--primary-crimson);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--primary-navy);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-crimson);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--primary-crimson);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 0.5rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.25rem;
    background-color: var(--light-gray);
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: none;
    background-color: transparent;
    color: var(--primary-navy);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    border-radius: 6px;
    transition: var(--transition);
}

.lang-btn:hover {
    background-color: var(--medium-gray);
}

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

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-navy);
    transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero {
    padding: 8rem 0 5rem;
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
    margin-top: 70px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-text {
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-navy);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* Hero visual container */
.hero-visual {
    animation: fadeInRight 0.8s ease;
    position: relative;
}

/* Hero image styling */
.hero-image {
    width: 100%;
    height: auto;
    max-height: 500px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(26, 35, 50, 0.2);
    object-fit: cover;
    transition: var(--transition);
    display: block;
}

.hero-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(26, 35, 50, 0.3);
}

/* Legacy styles for backward compatibility */
.image-placeholder {
    width: 100%;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(26, 35, 50, 0.15);
    transition: var(--transition);
}

.image-placeholder:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(26, 35, 50, 0.2);
}

.image-placeholder svg {
    width: 100%;
    height: auto;
    display: block;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-crimson);
    color: var(--white);
    box-shadow: 0 10px 30px rgba(220, 20, 60, 0.3);
}

.btn-primary:hover {
    background-color: var(--crimson-hover);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(220, 20, 60, 0.4);
}

/* ===== SECTION TITLES ===== */
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-navy);
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary-crimson);
    border-radius: 2px;
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: var(--section-padding);
    background-color: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background-color: var(--light-gray);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-crimson);
    box-shadow: 0 20px 50px rgba(26, 35, 50, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-crimson) 0%, var(--crimson-hover) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 1rem;
}

.feature-text {
    color: var(--text-gray);
    line-height: 1.7;
}

/* ===== SERVICES SECTION ===== */
.services {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.service-block {
    background-color: var(--white);
    padding: 3rem;
    border-radius: 16px;
    border-left: 4px solid var(--primary-crimson);
    box-shadow: 0 10px 40px rgba(26, 35, 50, 0.08);
    transition: var(--transition);
}

.service-block:hover {
    box-shadow: 0 20px 60px rgba(26, 35, 50, 0.12);
    transform: translateX(5px);
}

.service-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 1rem;
}

.service-intro {
    font-weight: 600;
    color: var(--primary-crimson);
    margin-bottom: 1rem;
}

.service-list {
    list-style: none;
    padding-left: 0;
}

.service-list li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    color: var(--text-gray);
    position: relative;
    line-height: 1.6;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-crimson);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: var(--section-padding);
    background-color: var(--white);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    margin-top: 2rem;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

/* ===== BLOG SECTION ===== */
.blog {
    padding: var(--section-padding);
    background-color: var(--white);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.blog-card {
    background-color: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(26, 35, 50, 0.08);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(26, 35, 50, 0.15);
}

.blog-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, #2a3a4f 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.blog-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, var(--primary-crimson) 30%, var(--primary-crimson) 50%, transparent 50%);
    opacity: 0.1;
}

.blog-image svg {
    width: 80px;
    height: 80px;
    color: var(--white);
    opacity: 0.3;
    z-index: 1;
}

.blog-content {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.blog-date {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.blog-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.blog-excerpt {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.blog-link {
    color: var(--primary-crimson);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.blog-link::after {
    content: '→';
    margin-left: 0.5rem;
    transition: var(--transition);
}

.blog-link:hover {
    color: var(--crimson-hover);
}

.blog-link:hover::after {
    margin-left: 1rem;
}

/* ===== BLOG MODAL ===== */
.blog-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
}

.blog-modal.active {
    display: block;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(26, 35, 50, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-container {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    margin: 5vh auto;
    background-color: var(--white);
    border-radius: 20px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: slideUp 0.4s ease;
    z-index: 10000;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

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

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    background-color: var(--white);
    border: 2px solid var(--light-gray);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10001;
}

.modal-close:hover {
    background-color: var(--primary-crimson);
    border-color: var(--primary-crimson);
    transform: rotate(90deg);
}

.modal-close svg {
    width: 20px;
    height: 20px;
    color: var(--text-gray);
    transition: var(--transition);
}

.modal-close:hover svg {
    color: var(--white);
}

.modal-content {
    padding: 3rem;
    max-height: 90vh;
    overflow-y: auto;
}

/* Modal content typography */
.modal-content h2 {
    font-size: 2rem;
    color: var(--primary-navy);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.modal-content .blog-date {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    display: block;
}

.modal-content h3 {
    font-size: 1.5rem;
    color: var(--primary-navy);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.modal-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.modal-content ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.modal-content ul li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 0.75rem;
    line-height: 1.7;
    color: var(--text-gray);
}

.modal-content ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-crimson);
    font-weight: bold;
}

.modal-content ul li strong {
    color: var(--primary-navy);
}

/* Custom scrollbar for modal */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--light-gray);
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--primary-navy);
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-crimson);
}

/* ===== CONTACT SECTION ===== */
.contact {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
}

.contact-grid {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 600px;
}

.contact-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-crimson);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-navy);
    margin-bottom: 0.25rem;
}

.contact-item a {
    color: var(--text-gray);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--primary-crimson);
}

/* Contact Form */
.contact-form-wrapper {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(26, 35, 50, 0.08);
}

.contact-form-wrapper h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 2rem;
}

.form-group {
    position: relative;
    margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-crimson);
}

.form-group label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--text-gray);
    transition: var(--transition);
    pointer-events: none;
    background-color: var(--white);
    padding: 0 0.25rem;
}

.form-group input:focus+label,
.form-group input:valid+label,
.form-group textarea:focus+label,
.form-group textarea:valid+label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.875rem;
    color: var(--primary-crimson);
}

.form-group input[type="file"] {
    padding: 0.75rem;
}

.file-label {
    position: static;
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary-navy);
    font-weight: 500;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--primary-navy);
    color: var(--white);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr;
    gap: 2rem;
    align-items: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.footer-info p {
    color: var(--medium-gray);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-crimson);
    transform: translateY(-5px);
}

.footer-copyright {
    text-align: right;
    color: var(--medium-gray);
}

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

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: calc(100vh - 70px);
        background-color: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: -5px 0 20px rgba(26, 35, 50, 0.1);
        transition: var(--transition);
    }

    .nav-menu.show {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 1.5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-copyright {
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 6rem 0 3rem;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .service-block {
        padding: 2rem;
    }

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

    .contact-form-wrapper {
        padding: 1.5rem;
    }
}