/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

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

:root {
    --primary-blue: #1e40af;
    --dark-blue: #1e3a8a;
    --light-blue: #3b82f6;
    --white: #ffffff;
    --gray-light: #f3f4f6;
    --gray: #6b7280;
    --gray-dark: #374151;
    --text-dark: #111827;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

/* Header & Navigation */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    width: 250px;
    height: 60px;
    object-fit: contain;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: all 0.3s;
}

/* Main Content */
main {
    margin-top: 80px;
}

/* Section IDs for smooth scrolling */
section[id] {
    scroll-margin-top: 100px;
}

html {
    scroll-behavior: smooth;
}

/* Hero Section */
.hero {
    position: relative;
    color: var(--white);
    padding: 6rem 2rem;
    text-align: center;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-bg-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.hero-video-desktop {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.hero-bg-image-mobile {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('image/image.jpg');
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.15) 0%, rgba(59, 131, 246, 0.15) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 0, 0, 0.3);
}

.hero .tagline {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.hero .typewriter-line {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.hero .tagline .typewriter-line {
    font-size: 1.5rem;
}

.typewriter-cursor {
    display: inline-block;
    animation: blink 0.8s step-end infinite;
    color: var(--white);
}

.typewriter-cursor-2 {
    margin-left: 2px;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* Hero 텍스트 하이라이트 - 가독성 */
.hero-content h1,
.hero-content .tagline,
.hero-content .typewriter-line {
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 0, 0, 0.5);
}

.hero-content .btn {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--white);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

/* Section Styles */
section {
    padding: 4rem 2rem;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

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

.service-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.service-card h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--gray-dark);
    line-height: 1.8;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.product-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.product-card-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    color: var(--white);
    padding: 1.5rem;
}

.product-card-header h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.product-card-body {
    padding: 1.5rem;
}

.product-card-body p {
    color: var(--gray-dark);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.product-card-body ul {
    list-style: none;
    padding-left: 0;
}

.product-card-body li {
    padding: 0.5rem 0;
    color: var(--gray-dark);
    padding-left: 1.5rem;
    position: relative;
}

.product-card-body li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* Testimonials */
.testimonials {
    background-color: var(--gray-light);
}

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

.testimonial-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.testimonial-card p {
    font-style: italic;
    color: var(--gray-dark);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.testimonial-card .author {
    font-weight: 600;
    color: var(--primary-blue);
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    color: var(--white);
    text-align: center;
    padding: 4rem 2rem;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* About Page Styles */
.about-section {
    padding: 3rem 0;
}

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

.about-content h2 {
    color: var(--primary-blue);
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.about-content p {
    color: var(--gray-dark);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.timeline {
    margin: 3rem 0;
}

.timeline-item {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    background-color: var(--white);
    border-left: 4px solid var(--primary-blue);
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.timeline-item h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.timeline-item p {
    color: var(--gray-dark);
    margin: 0;
}

.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.vision-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.vision-card h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.vision-card p {
    color: var(--gray-dark);
    line-height: 1.8;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.team-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.team-card h3 {
    color: var(--primary-blue);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.team-card .position {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.team-card p {
    color: var(--gray-dark);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Contact Form */
.contact-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-form {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.contact-form h3 {
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--gray-dark);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-light);
    border-radius: 5px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.form-group input.error,
.form-group textarea.error {
    border-color: #ef4444;
    background-color: #fef2f2;
}

.error-message {
    display: block;
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.5rem;
    min-height: 1.25rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.contact-info {
    background-color: var(--gray-light);
    padding: 2rem;
    border-radius: 10px;
}

.contact-info h3 {
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.contact-info-item {
    margin-bottom: 1.5rem;
}

.contact-info-item h4 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.contact-info-item p {
    color: var(--gray-dark);
    line-height: 1.8;
}

.contact-info-item a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.3s;
}

.contact-info-item a:hover {
    color: var(--light-blue);
    text-decoration: underline;
}

footer a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.3s;
}

footer a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: var(--white);
    padding: 2rem;
    text-align: center;
}

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

.footer-content p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-video-desktop {
        display: none;
    }

    .hero-bg-image-mobile {
        display: block;
    }

    .logo img {
        width: 150px;
        height: 45px;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .tagline {
        font-size: 1.2rem;
    }

    .hero p {
        font-size: 1rem;
    }

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

    .services-grid,
    .products-grid,
    .testimonials-grid,
    .vision-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }

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

    .hero {
        padding: 4rem 1.5rem;
    }

    section {
        padding: 3rem 1.5rem;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero .tagline {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* Contact Modal */
.contact-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.contact-modal-overlay.show {
    display: flex;
}

.contact-modal {
    background: var(--white);
    border-radius: 10px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.contact-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0;
}

.contact-modal-header h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
}

.contact-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray);
    padding: 0.25rem;
    line-height: 1;
}

.contact-modal-close:hover {
    color: var(--text-dark);
}

.contact-modal-body {
    padding: 1.5rem;
}

.contact-modal .form-group {
    margin-bottom: 1.25rem;
}

.contact-modal .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--gray-dark);
    font-weight: 500;
}

.contact-modal .form-group input,
.contact-modal .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-light);
    border-radius: 5px;
    font-family: 'Noto Sans KR', sans-serif;
}

.contact-modal .form-group textarea {
    resize: vertical;
    min-height: 120px;
}