* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* 별이 빛나는 배경 애니메이션 */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background: linear-gradient(135deg, #0c1445 0%, #1a2980 50%, #26d0ce 100%);
}

.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    animation: twinkle 3s infinite;
}

/* 달 애니메이션 */
.moon {
    position: absolute;
    top: 10%;
    right: 15%;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle at 30% 30%, #f5f5dc 0%, #e6e6e6 40%, #d3d3d3 100%);
    border-radius: 50%;
    box-shadow: 
        0 0 20px rgba(245, 245, 220, 0.3),
        inset -10px -10px 0 rgba(200, 200, 200, 0.3);
    animation: moonFloat 8s ease-in-out infinite;
}

/* 달 표면의 크레이터 */
.moon::before {
    content: '';
    position: absolute;
    top: 25%;
    left: 40%;
    width: 12px;
    height: 12px;
    background: rgba(180, 180, 180, 0.4);
    border-radius: 50%;
    box-shadow: 
        15px 10px 0 -2px rgba(180, 180, 180, 0.3),
        -5px 20px 0 -3px rgba(180, 180, 180, 0.3);
}

@keyframes moonFloat {
    0%, 100% { 
        transform: translateY(0px) translateX(0px);
        opacity: 0.8;
    }
    50% { 
        transform: translateY(-15px) translateX(10px);
        opacity: 1;
    }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* 헤더 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(12, 20, 69, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #26d0ce;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo::before {
    content: "⭐";
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

.nav-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    color: #26d0ce;
    background: rgba(38, 208, 206, 0.1);
}

/* 메인 섹션 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
}

.hero-content {
    max-width: 800px;
    padding: 0 2rem;
    animation: fadeInUp 1s ease-out;
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #26d0ce, #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(45deg, #26d0ce, #1a2980);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(38, 208, 206, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(38, 208, 206, 0.4);
}

/* 섹션 스타일 */
.section {
    padding: 5rem 0;
    position: relative;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #0c1445;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: #26d0ce;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    text-align: center;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #0c1445;
    text-align: center;
}

.feature-card p {
    color: #666;
    text-align: center;
}

/* 프로그램 소개 */
.programs {
    background: linear-gradient(135deg, #0c1445 0%, #1a2980 100%);
    color: white;
}

.programs h2 {
    color: white !important;
}

.program-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    align-items: stretch; /* 추가 */
}

.program-link {
    text-decoration: none;
    color: inherit;
    display: flex; /* block → flex 변경 */
}

.program-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    width: 100%;
    align-items: center; /* 추가 */
}

.program-item p {
    flex: 1; /* 추가 — 설명 텍스트가 남은 공간을 채워 카드 높이 균등화 */
}

.program-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.program-item:hover .program-icon {
    transform: scale(1.1);
}

.program-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.program-link .program-item:hover {
    background: rgba(38, 208, 206, 0.3);
    border-color: rgba(38, 208, 206, 0.5);
}

.program-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #26d0ce;
}

/* 연락처 */
.contact {
    text-align: center;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-icon {
    font-size: 1.5rem;
    color: #26d0ce;
}

.contact-icon-img {
    width: 24px;
    height: 24px;
    color: #26d0ce;
}

/* 푸터 */
footer {
    background: #0c1445;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* 반응형 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .contact-info {
        flex-direction: column;
        align-items: center;
    }
    
    /* 모바일에서 달 크기 조정 */
    .moon {
        width: 75px !important;
        height: 75px !important;
        top: 8% !important;
        right: 10% !important;
    }
}

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

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