/* 기본 설정 */
:root {
    --primary-color: #4F8A8B;
    --primary-light: #7FB8B8;
    --primary-dark: #3A6B6C;
    --secondary-color: #FF8A66;
    --accent-color: #8B5E3C;
    --text-dark: #2C3E50;
    --text-light: #6C7A89;
    --bg-light: #F8F9FA;
    --bg-ivory: #FFFEF7;
    --white: #FFFFFF;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* 헤더 스타일 */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.5rem;
}

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

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

.auth-menu {
    margin-left: 1rem;
}

.auth-link {
    padding: 8px 20px;
    background: var(--primary-color);
    color: white !important;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.auth-link:hover {
    background: var(--primary-dark);
    color: white !important;
    transform: translateY(-2px);
}

.auth-link::after {
    display: none;
}

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

/* 히어로 섹션 */
.hero-section {
    margin-top: 70px;
    min-height: 600px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
}

.hero-content {
    text-align: center;
    color: var(--white);
    z-index: 2;
    padding: 2rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-cta {
    background: var(--secondary-color);
    color: var(--white);
    font-size: 1.1rem;
    padding: 15px 40px;
}

.btn-cta:hover {
    background: #FF7A50;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 히어로 도형 애니메이션 */
.hero-image {
    position: absolute;
    right: 0;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--white);
    top: 10%;
    right: 10%;
    animation: float 6s ease-in-out infinite;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--secondary-color);
    bottom: 20%;
    left: 10%;
    animation: float 8s ease-in-out infinite reverse;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--white);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-30px); }
}

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

/* 섹션 공통 스타일 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

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

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* 프로그램 섹션 */
.programs-section {
    background: var(--white);
}

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

.program-card {
    background: var(--bg-ivory);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(79, 138, 139, 0.1);
}

.program-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    background: var(--white);
}

.program-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

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

.program-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 강사 모집 섹션 */
.recruit-section {
    background: linear-gradient(135deg, #F8F9FA 0%, #E8F4F4 100%);
}

.recruit-content {
    text-align: center;
}

.recruit-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.grade-system {
    margin: 3rem 0;
}

.grade-system h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--primary-dark);
}

.grade-cards {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.grade-card {
    background: var(--white);
    border-radius: 15px;
    padding: 2rem 1.5rem;
    width: 200px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
}

.grade-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.grade-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.grade-card h4 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.grade-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.recruit-benefits {
    background: var(--white);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem auto;
    max-width: 600px;
}

.recruit-benefits h3 {
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
}

.recruit-benefits ul {
    list-style: none;
    text-align: left;
}

.recruit-benefits li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.recruit-benefits i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* 인사말 섹션 */
.greeting-section {
    background: var(--bg-ivory);
    padding: 100px 0;
}

.greeting-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.greeting-image {
    flex-shrink: 0;
}

.greeting-avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.greeting-text h2 {
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.greeting-text blockquote {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
    font-style: italic;
    position: relative;
    padding-left: 2rem;
}

.greeting-text blockquote::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -10px;
    font-size: 3rem;
    color: var(--primary-light);
}

.greeting-signature {
    margin-top: 2rem;
    text-align: right;
}

.signature-name {
    font-weight: 700;
    color: var(--primary-dark);
}

/* 활동 사례 섹션 */
.cases-section {
    background: var(--white);
}

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

.case-card {
    background: var(--bg-ivory);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    font-size: 3rem;
    color: var(--white);
}

.case-content {
    padding: 1.5rem;
}

.case-content h3 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.case-content p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.case-date {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* 문의하기 섹션 */
.contact-section {
    background: linear-gradient(135deg, #F8F9FA 0%, #E8F4F4 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-item h4 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-light);
}

.contact-item .small {
    font-size: 0.9rem;
    color: var(--text-light);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Noto Sans KR', sans-serif;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 138, 139, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* 푸터 */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-logo i {
    font-size: 2rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

.footer-column li {
    padding: 0.5rem 0;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--white);
}

.footer-column i {
    margin-right: 8px;
    width: 16px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .programs-grid {
        grid-template-columns: 1fr;
    }
    
    .grade-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .greeting-content {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 10px 25px;
        font-size: 0.95rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}