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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1rem;
    color: #666;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
}

.btn-outline {
    background: transparent;
    color: #333;
    border: 2px solid #ddd;
}

.btn-outline:hover {
    background: #333;
    color: white;
    border-color: #333;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #667eea;
    margin: 0;
    font-size: 2.5rem;
    font-family: 'Pacifico', 'Dancing Script', 'Brush Script MT', cursive;
    font-weight: 400;
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px rgba(102, 126, 234, 0.2);
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #667eea;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding-top: 80px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #333;
}

.highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #666;
    line-height: 1.8;
}

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

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

.hero-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 650px;
    width: 100%;
}

.stat-card {
    background: white;
    padding: 2rem 1.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-card h4 {
    font-size: 0.9rem;
    color: #333;
    margin-bottom: 1rem;
    font-weight: 600;
}

.stat-text {
    font-size: 0.75rem;
    color: #666;
    margin-top: 0.5rem;
    line-height: 1.4;
}

/* Chart Line */
.stat-chart {
    height: 80px;
    position: relative;
    margin: 1rem 0;
}

.chart-line {
    width: 100%;
    height: 60px;
    background: linear-gradient(to top right, #667eea 0%, #764ba2 100%);
    clip-path: polygon(0 80%, 33% 50%, 66% 30%, 100% 10%, 100% 100%, 0 100%);
    border-radius: 5px;
}

.chart-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.65rem;
    color: #666;
    padding: 0 0.2rem;
}

/* Bar Chart */
.stat-bars {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bar-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
}

.bar-label {
    width: 50px;
    text-align: left;
    color: #666;
}

.bar-bg {
    flex: 1;
    height: 20px;
    background: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    transition: width 1s ease;
}

.bar-value {
    width: 30px;
    text-align: right;
    color: #667eea;
    font-weight: 700;
}

/* Circle Chart */
.stat-circle {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    position: relative;
}

.stat-circle svg {
    width: 100%;
    height: 100%;
}

.circle-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
}

/* Achievement List */
.achievement-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.achievement-icon {
    font-size: 1.5rem;
}

.achievement-label {
    font-size: 0.7rem;
    color: #666;
}

.achievement-value {
    font-size: 1rem;
    font-weight: 700;
    color: #667eea;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    color: #333;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: #666;
}

/* About Section */
.about {
    padding: 1.5rem 0;
    background: white;
}

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

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

/* Instructor Profile */
.instructor-profile {
    grid-column: span 1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.instructor-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.instructor-photo {
    width: 100px;
    height: 100px;
    background: white;
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.3s ease;
    border: 3px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.instructor-photo img {
    border-radius: 50%;
}

.instructor-photo:hover {
    transform: scale(1.05);
}

.photo-label {
    font-size: 0.65rem;
    color: #666;
    margin-top: 0.5rem;
}

.instructor-title h3 {
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
    font-weight: 700;
}

.instructor-title p {
    font-size: 0.85rem;
    opacity: 0.9;
    color: white;
}

.instructor-section {
    margin-bottom: 1.5rem;
}

.section-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.instructor-section h4 {
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    letter-spacing: 1px;
    opacity: 0.9;
}

.instructor-list {
    list-style: none;
    padding: 0;
}

.instructor-list li {
    font-size: 0.8rem;
    margin-bottom: 0.8rem;
    line-height: 1.5;
    opacity: 0.95;
}

.instructor-list li strong {
    display: block;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.experience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.exp-box {
    background: rgba(255, 255, 255, 0.15);
    padding: 0.8rem;
    border-radius: 8px;
    text-align: center;
}

.exp-number {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.exp-label {
    font-size: 0.65rem;
    opacity: 0.9;
}

.client-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.client-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.3rem 0.7rem;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: 500;
}

.instructor-footer {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.footer-badge p {
    margin: 0.3rem 0;
    font-size: 0.8rem;
    opacity: 0.95;
}

.about-card {
    text-align: center;
    padding: 2rem;
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.about-card:hover {
    transform: translateY(-10px);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.card-icon i {
    font-size: 2rem;
    color: white;
}

.about-card h3 {
    color: #333;
    margin-bottom: 1rem;
}

.about-card p {
    color: #666;
    line-height: 1.6;
}

/* Services Section */
.services {
    padding: 1.5rem 0;
    background: #f8f9fa;
}

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

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-icon i {
    font-size: 1.5rem;
    color: white;
}

.service-card h3 {
    color: #333;
    margin-bottom: 1rem;
}

.service-card p {
    color: #666;
    margin-bottom: 1.5rem;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    color: #666;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.service-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

/* Courses Section */
.courses {
    padding: 1.5rem 0;
    background: white;
}

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

.course-card {
    background: white;
    border: 2px solid #f0f0f0;
    border-radius: 20px;
    padding: 2rem;
    position: relative;
    transition: all 0.3s ease;
}

.course-card:hover {
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.1);
}

.course-card.featured {
    border-color: #667eea;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
}

.course-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.course-header {
    margin-bottom: 1.5rem;
}

.course-header h3 {
    color: #333;
    margin-bottom: 0.5rem;
}

.course-price {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.course-price span {
    font-size: 1rem;
    color: #666;
    font-weight: 400;
}

.course-content p {
    color: #666;
    margin-bottom: 1.5rem;
}

.course-content ul {
    list-style: none;
    margin-bottom: 2rem;
}

.course-content li {
    color: #666;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.course-content li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

/* Blog Section */
.blog {
    padding: 1.5rem 0;
    background: #f8f9fa;
}

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

.blog-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.blog-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-placeholder {
    color: white;
    text-align: center;
}

.blog-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.blog-content {
    padding: 1.5rem;
}

.blog-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.blog-date {
    color: #999;
}

.blog-category {
    color: #667eea;
    font-weight: 500;
}

.blog-content h3 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.blog-content p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.blog-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.blog-link:hover {
    color: #764ba2;
}

/* Contact Section */
.contact {
    padding: 1.5rem 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

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

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    color: white;
    font-size: 1.2rem;
}

.contact-details h4 {
    color: #333;
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: #666;
    margin: 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

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

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #ccc;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #667eea;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #555;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: background 0.3s ease;
}

.social-links a:hover {
    background: #667eea;
}

.footer-bottom {
    border-top: 1px solid #555;
    padding-top: 1rem;
    text-align: center;
}

.footer-bottom p {
    color: #ccc;
    margin: 0;
}

.footer-bottom a {
    color: #667eea;
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: 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-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats-grid {
        grid-template-columns: 1fr;
        max-width: 100%;
    }

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

    .about-grid,
    .about-grid-new,
    .services-grid,
    .courses-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 250px;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Smooth scrolling for anchor links */
html {
    scroll-padding-top: 80px;
}