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

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    transition: all 0.3s ease;
}

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

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.theme-btn {
    background: transparent;
    border: none;
    padding: 8px 15px;
    border-radius: 25px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.theme-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.theme-btn.active {
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Liquid Glass Theme */
.liquid-glass {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.liquid-glass .hero {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
}

.liquid-glass .info-card,
.liquid-glass .feature-card,
.liquid-glass .timeline-content,
.liquid-glass .instructor-card,
.liquid-glass .benefit-item,
.liquid-glass .pricing-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Dark Blue Theme */
.dark-blue {
    background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    color: white;
}

.dark-blue .hero {
    background: linear-gradient(135deg, rgba(15, 32, 39, 0.95) 0%, rgba(32, 58, 67, 0.95) 50%, rgba(44, 83, 100, 0.95) 100%);
}

.dark-blue .info-card,
.dark-blue .feature-card,
.dark-blue .timeline-content,
.dark-blue .instructor-card,
.dark-blue .benefit-item,
.dark-blue .pricing-card,
.dark-blue .tool-item {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Light Theme */
.light {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    color: #333;
}

.light .hero {
    background: linear-gradient(135deg, rgba(255, 236, 210, 0.9) 0%, rgba(252, 182, 159, 0.9) 100%);
}

.light .info-card,
.light .feature-card,
.light .timeline-content,
.light .instructor-card,
.light .benefit-item,
.light .pricing-card {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.light .theme-toggle {
    background: rgba(0, 0, 0, 0.1);
}

.light .theme-btn {
    color: #333;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-icon {
    position: absolute;
    font-size: 3rem;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.floating-icon:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-icon:nth-child(2) {
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.floating-icon:nth-child(3) {
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.rocket-emoji {
    font-size: 1.5em;
    animation: rocketBounce 2s ease-in-out infinite;
    display: inline-block;
}

@keyframes rocketBounce {

    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }

    25% {
        transform: translateY(-10px) rotate(-5deg);
    }

    50% {
        transform: translateY(-15px) rotate(0deg);
    }

    75% {
        transform: translateY(-10px) rotate(5deg);
    }
}

.gradient-text {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.badge {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 25px;
    backdrop-filter: blur(10px);
}

.stat-item i {
    font-size: 1.2rem;
}

/* Course Info Section */
.course-info {
    padding: 5rem 0;
}

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

.info-card {
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: all 0.5s ease;
    opacity: 0;
}

.info-card:hover::before {
    opacity: 1;
    animation: shimmer 1s ease-in-out;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }

    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.info-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.info-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #4ecdc4;
}

.info-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

/* Section Titles */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    border-radius: 2px;
}

.curriculum-icon,
.tools-icon,
.benefits-icon {
    font-size: 2rem;
    color: #4ecdc4;
}

/* Features Section */
.features {
    padding: 5rem 0;
}

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

.feature-card {
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.feature-card:hover {
    transform: translateY(-10px) scale(1.02);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

/* Curriculum Section */
.curriculum {
    padding: 5rem 0;
}

.curriculum-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.curriculum-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    color: white;
    z-index: 2;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.timeline-content {
    width: 45%;
    padding: 2rem;
    border-radius: 20px;
    position: relative;
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: scale(1.05);
}

.week-icon {
    font-size: 2.5rem;
    color: #4ecdc4;
    margin-bottom: 1rem;
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

/* Tools Section */
.tools {
    padding: 5rem 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.tool-item {
    padding: 1.5rem;
    text-align: center;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    cursor: pointer;
}

.tool-item:hover {
    transform: translateY(-5px) rotate(2deg);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.tool-item i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #4ecdc4;
}

.tool-item span {
    font-weight: 500;
    font-size: 1.1rem;
}

/* 
Instructor Section */
.instructor {
    padding: 5rem 0;
}

.instructor-card {
    display: flex;
    align-items: center;
    gap: 3rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem;
    border-radius: 25px;
    position: relative;
    overflow: hidden;
}

.instructor-image {
    position: relative;
    flex-shrink: 0;
}

.instructor-image img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.instructor-image:hover img {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background: linear-gradient(45deg, rgba(255, 107, 107, 0.3), rgba(78, 205, 196, 0.3));
    opacity: 0;
    transition: all 0.3s ease;
}

.instructor-image:hover .image-overlay {
    opacity: 1;
}

.instructor-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.instructor-titles {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.title-badge {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    width: fit-content;
}

.instructor-info p {
    font-size: 1.1rem;
    line-height: 1.8;
    opacity: 0.9;
}

/* Benefits Section */
.benefits {
    padding: 5rem 0;
}

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

.benefit-item {
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.benefit-item:hover {
    transform: translateY(-10px);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(45deg, #45b7d1, #96ceb4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    position: relative;
    overflow: hidden;
}

.benefit-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: iconShine 3s ease-in-out infinite;
}

@keyframes iconShine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }

    50% {
        transform: translateX(0%) translateY(0%) rotate(45deg);
    }

    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.benefit-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

/* Pricing Section */
.pricing {
    padding: 5rem 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-card {
    padding: 2.5rem 2rem;
    border-radius: 25px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 3px solid #4ecdc4;
}

.pricing-card:hover {
    transform: translateY(-10px) scale(1.02);
}

.pricing-card.featured:hover {
    transform: translateY(-10px) scale(1.08);
}

.pricing-badge {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
}

.currency {
    font-size: 1.5rem;
    opacity: 0.7;
}

.discount {
    color: #4ecdc4;
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.original-price {
    text-decoration: line-through;
    opacity: 0.6;
    font-size: 1.2rem;
}

.per-person,
.regular {
    opacity: 0.8;
    font-size: 1rem;
}

/* CTA Section */
.cta {
    padding: 5rem 0;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.cta-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.cta-button i {
    font-size: 1.3rem;
}

/* Contact Section */
.contact {
    padding: 3rem 0;
    text-align: center;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.2rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 25px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.contact-item i {
    font-size: 1.5rem;
    color: #4ecdc4;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
        flex-direction: column;
    }

    .badge {
        font-size: 1.5rem;
    }

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

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

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

    .instructor-card {
        flex-direction: column;
        text-align: center;
    }

    .instructor-titles {
        align-items: center;
    }

    .timeline-item {
        flex-direction: column !important;
    }

    .timeline-content {
        width: 90%;
        margin-top: 1rem;
    }

    .curriculum-timeline::before {
        left: 30px;
    }

    .timeline-marker {
        left: 30px;
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
    }

    .theme-toggle {
        flex-direction: column;
        top: 10px;
        right: 10px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .container {
        padding: 0 15px;
    }

    .info-grid,
    .features-grid,
    .benefits-grid,
    .tools-grid {
        grid-template-columns: 1fr;
    }

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