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

:root {
    /* Main Purple Gradient Colors - Bright & Vibrant */
    --lavender: #F3E5FF;
    --soft-purple: #E8D4FF;
    --light-lilac: #DDB3FF;
    --medium-purple: #C996FF;
    --deep-purple: #A855F7;
    --vivid-purple: #9333EA;
    
    /* Accent Colors */
    --white: #FFFFFF;
    --light-gray: #FAFAFA;
    --silver: #E5E7EB;
    --dark-gray: #4B5563;
    --text-dark: #1F2937;
    
    /* Gradients - More Vibrant */
    --gradient-main: linear-gradient(135deg, #F3E5FF 0%, #E8D4FF 30%, #DDB3FF 70%, #C996FF 100%);
    --gradient-hero: linear-gradient(135deg, rgba(243, 229, 255, 0.95) 0%, rgba(232, 212, 255, 0.9) 40%, rgba(221, 179, 255, 0.85) 100%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.98) 0%, rgba(243, 229, 255, 0.4) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-main: 'Noto Sans KR', sans-serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.7;
    color: var(--text-dark);
    background: linear-gradient(to bottom, #FAFAFA 0%, #F3E5FF 100%);
    overflow-x: hidden;
}

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

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(147, 112, 219, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-md);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

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

.nav-link:hover {
    color: var(--deep-purple);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--deep-purple);
    cursor: pointer;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.25) 0%, rgba(221, 179, 255, 0.15) 50%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-background::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(232, 212, 255, 0.4) 0%, rgba(243, 229, 255, 0.2) 50%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(50px, 50px) scale(1.1);
    }
}

.hero-content {
    text-align: center;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--deep-purple) 0%, var(--medium-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    margin: var(--spacing-md) 0;
}

.hero-quote {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.hero-quote strong {
    color: var(--deep-purple);
    font-weight: 700;
}

.hero-credentials {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.credential-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(147, 112, 219, 0.15);
    transition: var(--transition);
}

.credential-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(147, 112, 219, 0.25);
}

.credential-item i {
    font-size: 1.2rem;
    color: var(--deep-purple);
}

.credential-item span {
    font-weight: 500;
    color: var(--text-dark);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-main);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.35);
    font-weight: 700;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(168, 85, 247, 0.5);
    filter: brightness(1.1);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.9);
    color: var(--deep-purple);
    border-color: var(--deep-purple);
}

.btn-outline:hover {
    background: var(--deep-purple);
    color: var(--white);
    transform: translateY(-3px);
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

/* Fade In Animation */
.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.3s; }
.fade-in:nth-child(3) { animation-delay: 0.5s; }
.fade-in:nth-child(4) { animation-delay: 0.7s; }
.fade-in:nth-child(5) { animation-delay: 0.9s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Section Styles
   =================================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.section-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-main);
    margin: 0 auto;
    border-radius: 2px;
}

/* ===================================
   About Section
   =================================== */
.about {
    background: linear-gradient(to bottom, #FFFFFF 0%, #F3E5FF 100%);
}

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

.about-text {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(147, 112, 219, 0.1);
}

.about-intro {
    font-size: 1.2rem;
    line-height: 2;
    margin-bottom: var(--spacing-md);
}

.about-intro strong {
    color: var(--deep-purple);
    font-weight: 700;
}

.about-philosophy,
.about-vision {
    font-size: 1.1rem;
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 4px solid var(--light-lilac);
}

.about-philosophy strong,
.about-vision strong {
    color: var(--deep-purple);
    font-weight: 700;
}

.about-quote {
    background: var(--gradient-main);
    color: var(--white);
    padding: var(--spacing-md);
    border-radius: 15px;
    font-size: 1.3rem;
    font-weight: 600;
    text-align: center;
    margin-top: var(--spacing-lg);
    position: relative;
}

.about-quote i {
    opacity: 0.5;
    font-size: 1rem;
}

/* ===================================
   Credentials Section
   =================================== */
.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.credentials-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(147, 112, 219, 0.1);
    transition: var(--transition);
}

.credentials-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(147, 112, 219, 0.2);
}

.credentials-card .card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--deep-purple);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.credentials-card .card-title i {
    font-size: 1.5rem;
}

.credentials-list {
    list-style: none;
}

.credentials-list li {
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    line-height: 1.6;
}

.credentials-list i {
    color: var(--light-lilac);
    margin-top: 0.3rem;
    flex-shrink: 0;
}

.credentials-list .detail {
    display: block;
    color: var(--dark-gray);
    font-size: 0.95rem;
    margin-left: 1.5rem;
}

/* ===================================
   Expertise Section
   =================================== */
.expertise {
    background: linear-gradient(to bottom, #FAFAFA 0%, #F3E5FF 50%, #E8D4FF 100%);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.expertise-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(147, 112, 219, 0.1);
    transition: var(--transition);
}

.expertise-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(147, 112, 219, 0.2);
}

.expertise-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
}

.expertise-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.expertise-card p {
    color: var(--dark-gray);
    font-size: 0.95rem;
}

/* ===================================
   Programs Section
   =================================== */
.programs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.program-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(147, 112, 219, 0.1);
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

.program-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(147, 112, 219, 0.2);
    border-color: var(--light-lilac);
}

.program-card.featured {
    border-color: var(--deep-purple);
    box-shadow: 0 10px 30px rgba(147, 112, 219, 0.2);
}

.program-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--gradient-main);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
}

.program-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-main);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
}

.program-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.program-title .level {
    font-size: 1rem;
    color: var(--dark-gray);
    font-weight: 500;
}

.program-slogan {
    font-size: 1.1rem;
    color: var(--deep-purple);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.program-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.program-list li {
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.program-list i {
    color: var(--light-lilac);
    flex-shrink: 0;
}

.program-info {
    background: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: 10px;
    margin-top: var(--spacing-md);
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-item i {
    color: var(--deep-purple);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.info-item strong {
    color: var(--text-dark);
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    background: linear-gradient(to bottom, #FFFFFF 0%, #F3E5FF 100%);
}

.experience-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.experience-item {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(147, 112, 219, 0.1);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: var(--transition);
}

.experience-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(147, 112, 219, 0.2);
}

.experience-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
}

.experience-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.experience-content p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* ===================================
   CTA Section
   =================================== */
.cta {
    background: var(--gradient-hero);
    padding: var(--spacing-xl) 0;
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
}

.cta-description strong {
    color: var(--deep-purple);
    font-weight: 700;
}

.contact-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    flex-wrap: nowrap;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(168, 85, 247, 0.2);
    transition: var(--transition);
    flex: 1;
    min-width: 300px;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.35);
    background: rgba(255, 255, 255, 1);
}

.contact-item i {
    font-size: 2.5rem;
    color: var(--deep-purple);
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--deep-purple);
    margin-bottom: 0.3rem;
    letter-spacing: 0.5px;
}

.contact-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
    letter-spacing: 0.3px;
}

.contact-value:hover {
    color: var(--deep-purple);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer-content {
    padding: var(--spacing-md) 0;
}

.footer-text {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.footer-subtitle {
    font-size: 0.95rem;
    color: var(--silver);
}

/* ===================================
   Scroll to Top Button
   =================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-main);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(147, 112, 219, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(147, 112, 219, 0.4);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    /* Navigation */
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    /* Hero */
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-quote {
        font-size: 1.1rem;
    }
    
    .hero-credentials {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Sections */
    section {
        padding: var(--spacing-lg) 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* About */
    .about-text {
        padding: var(--spacing-md);
    }
    
    .about-intro {
        font-size: 1.1rem;
    }
    
    .about-quote {
        font-size: 1.1rem;
    }
    
    /* Credentials */
    .credentials-grid {
        grid-template-columns: 1fr;
    }
    
    /* Expertise */
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    /* Programs */
    .programs-grid {
        grid-template-columns: 1fr;
    }
    
    /* Experience */
    .experience-list {
        grid-template-columns: 1fr;
    }
    
    /* CTA */
    .cta-title {
        font-size: 1.8rem;
    }
    
    .cta-description {
        font-size: 1.1rem;
    }
    
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .contact-item {
        width: 100%;
        min-width: auto;
    }
    
    .contact-label {
        font-size: 1.1rem;
    }
    
    .contact-value {
        font-size: 1.2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    /* Scroll to top */
    .scroll-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .credential-item span {
        font-size: 0.9rem;
    }
}